@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700;800;900&display=swap');

/* ══════════════════════════════════════════════════════
   ESSTRATA PLATFORM — FRESH DESIGN SYSTEM
══════════════════════════════════════════════════════ */
:root {
  --c-bg:        #07111d;
  --c-bg1:       #0c1a2e;
  --c-bg2:       #11223d;
  --c-glass:     rgba(255,255,255,.04);
  --c-glass2:    rgba(255,255,255,.07);
  --c-border:    rgba(255,255,255,.08);
  --c-border2:   rgba(255,255,255,.14);
  --c-txt:       #e4ecf7;
  --c-txt2:      #8aa3be;
  --c-txt3:      #4d6a84;
  --c-blue:      #2d6be4;
  --c-blue2:     #1a54c8;
  --c-blue-glow: rgba(45,107,228,.35);
  --c-purple:    #7c3aed;
  --c-cyan:      #06b6d4;
  --c-green:     #10b981;
  --c-red:       #ef4444;
  --c-yellow:    #f59e0b;
  --r-sm: 8px; --r: 14px; --r-lg: 20px; --r-xl: 28px;
  --shadow-sm: 0 2px 12px rgba(0,0,0,.4);
  --shadow:    0 4px 24px rgba(0,0,0,.5);
  --shadow-lg: 0 12px 48px rgba(0,0,0,.6);
  --shadow-xl: 0 24px 80px rgba(0,0,0,.7);
  --blur: blur(24px);
  --t: .17s cubic-bezier(.4,0,.2,1);
}

/* ── Reset + Base ── */
*,*::before,*::after { box-sizing:border-box; margin:0; padding:0; }
html { scroll-behavior:smooth; }
body { font-family:'Inter',system-ui,sans-serif; background:var(--c-bg); color:var(--c-txt); font-size:15px; line-height:1.55; -webkit-font-smoothing:antialiased; min-height:100vh; }
body::before { content:''; position:fixed; inset:0; pointer-events:none; z-index:0; background: radial-gradient(ellipse 80% 60% at 0% 0%, rgba(45,107,228,.12) 0%, transparent 55%), radial-gradient(ellipse 60% 70% at 100% 100%, rgba(124,58,237,.09) 0%, transparent 55%); }
h1,h2,h3,h4 { color:var(--c-txt); line-height:1.2; }
a { color:var(--c-blue); text-decoration:none; transition:color var(--t); }
a:hover { color:#60a5fa; }
button,input,textarea,select { font:inherit; }
img { max-width:100%; }
*:focus-visible { outline:2px solid var(--c-blue); outline-offset:2px; border-radius:4px; }
::selection { background:rgba(45,107,228,.35); color:#fff; }
* { scrollbar-width:thin; scrollbar-color:rgba(255,255,255,.1) transparent; }
::-webkit-scrollbar { width:5px; height:5px; }
::-webkit-scrollbar-thumb { background:rgba(255,255,255,.1); border-radius:99px; }

.skip-link { position:absolute; left:-999px; top:8px; z-index:9999; background:var(--c-blue); color:#fff; padding:8px 14px; border-radius:var(--r-sm); }
.skip-link:focus { left:8px; }

/* ══════════════════════════════════════════════════════
   TOP NAVIGATION
══════════════════════════════════════════════════════ */
.topnav {
  position:sticky; top:0; z-index:200;
  background:rgba(7,17,29,.8);
  backdrop-filter:var(--blur);
  -webkit-backdrop-filter:var(--blur);
  border-bottom:1px solid var(--c-border);
  height:62px;
  display:flex; align-items:center;
  padding:0 32px;
  gap:0;
}
.topnav-logo {
  display:flex; align-items:center; gap:9px;
  font-size:1.1rem; font-weight:900; color:#fff;
  letter-spacing:-.03em; text-decoration:none;
  flex-shrink:0; margin-right:32px;
}
.topnav-logo-dot {
  width:9px; height:9px; border-radius:50%;
  background:var(--c-blue);
  box-shadow:0 0 12px var(--c-blue),0 0 24px rgba(45,107,228,.5);
  animation:pulse-dot 3s ease-in-out infinite;
}
@keyframes pulse-dot {
  0%,100% { box-shadow:0 0 10px var(--c-blue),0 0 20px rgba(45,107,228,.4); }
  50%      { box-shadow:0 0 20px var(--c-blue),0 0 40px rgba(45,107,228,.7); }
}
.topnav-tabs {
  display:flex; align-items:center; gap:2px; flex:1;
}
.topnav-tab {
  display:flex; align-items:center; gap:7px;
  padding:8px 16px; border-radius:var(--r-sm);
  font-size:13.5px; font-weight:500; color:var(--c-txt2);
  background:transparent; border:none; cursor:pointer;
  transition:background var(--t), color var(--t); white-space:nowrap;
  text-decoration:none;
}
.topnav-tab:hover { background:var(--c-glass2); color:var(--c-txt); text-decoration:none; }
.topnav-tab.active { background:rgba(45,107,228,.15); color:#93c5fd; font-weight:600; }
.topnav-tab svg { opacity:.65; transition:opacity var(--t); }
.topnav-tab.active svg, .topnav-tab:hover svg { opacity:1; }

.topnav-right {
  display:flex; align-items:center; gap:12px; margin-left:auto; flex-shrink:0;
}
.topnav-balance {
  background:rgba(45,107,228,.15); border:1px solid rgba(45,107,228,.3);
  border-radius:999px; padding:5px 14px;
  font-size:13px; font-weight:700; color:#93c5fd;
  display:flex; align-items:center; gap:6px;
}
.topnav-balance-dot { width:6px; height:6px; border-radius:50%; background:var(--c-green); box-shadow:0 0 8px var(--c-green); }
.topnav-avatar {
  width:36px; height:36px; border-radius:50%;
  background:linear-gradient(135deg,var(--c-blue),var(--c-purple));
  display:flex; align-items:center; justify-content:center;
  font-weight:800; font-size:14px; color:#fff; cursor:pointer;
  box-shadow:0 0 16px rgba(45,107,228,.4);
  border:2px solid rgba(255,255,255,.1);
}
.topnav-notif {
  position:relative; background:none; border:none; color:var(--c-txt2);
  cursor:pointer; padding:6px; border-radius:var(--r-sm);
  transition:background var(--t), color var(--t);
}
.topnav-notif:hover { background:var(--c-glass2); color:var(--c-txt); }
.topnav-badge {
  position:absolute; top:-2px; right:-2px;
  width:16px; height:16px; border-radius:50%;
  background:var(--c-red); color:#fff;
  font-size:9px; font-weight:800;
  display:flex; align-items:center; justify-content:center;
  box-shadow:0 0 8px rgba(239,68,68,.6);
}
.mobile-menu-btn { display:none; background:none; border:none; color:var(--c-txt); cursor:pointer; padding:6px; }

/* ══════════════════════════════════════════════════════
   PAGE WRAPPER
══════════════════════════════════════════════════════ */
.page-wrap {
  max-width:1600px; margin:0 auto;
  padding:0 32px 80px;
  position:relative; z-index:1;
}

/* ══════════════════════════════════════════════════════
   SECTION SYSTEM
══════════════════════════════════════════════════════ */
.tab-section { display:none; padding-top:36px; }
.tab-section.active { display:block; }

/* ══════════════════════════════════════════════════════
   HERO
══════════════════════════════════════════════════════ */
.hero {
  border-radius:var(--r-xl);
  background:linear-gradient(125deg,#0c1e3d 0%,#163068 40%,#1a4ba0 70%,#2d6be4 100%);
  padding:44px 48px;
  display:flex; align-items:center; justify-content:space-between; gap:32px; flex-wrap:wrap;
  position:relative; overflow:hidden; margin-bottom:40px;
  border:1px solid rgba(45,107,228,.3);
  box-shadow:0 0 0 1px rgba(255,255,255,.04) inset, var(--shadow-lg), 0 0 80px rgba(45,107,228,.15);
}
.hero::before {
  content:''; position:absolute; top:-100px; right:-100px;
  width:400px; height:400px; border-radius:50%;
  background:radial-gradient(circle,rgba(255,255,255,.06) 0%,transparent 70%);
}
.hero::after {
  content:''; position:absolute; bottom:-80px; left:30%;
  width:300px; height:300px; border-radius:50%;
  background:radial-gradient(circle,rgba(124,58,237,.15) 0%,transparent 70%);
}
.hero-left { position:relative; z-index:1; }
.hero-eyebrow { font-size:11px; font-weight:700; letter-spacing:.1em; text-transform:uppercase; color:rgba(255,255,255,.45); margin-bottom:10px; }
.hero-title { font-size:2.2rem; font-weight:900; color:#fff; letter-spacing:-.03em; margin-bottom:8px; line-height:1.1; }
.hero-sub { font-size:15px; color:rgba(255,255,255,.55); }
.hero-right { display:flex; gap:16px; flex-wrap:wrap; position:relative; z-index:1; }
.hero-stat {
  background:rgba(255,255,255,.1); border:1px solid rgba(255,255,255,.15);
  backdrop-filter:blur(12px); border-radius:16px;
  padding:18px 24px; text-align:center; min-width:100px;
}
.hero-stat-val { font-size:1.6rem; font-weight:900; color:#fff; line-height:1; letter-spacing:-.02em; }
.hero-stat-lbl { font-size:11px; color:rgba(255,255,255,.5); margin-top:6px; font-weight:600; text-transform:uppercase; letter-spacing:.05em; }

/* ══════════════════════════════════════════════════════
   SECTION HEADERS
══════════════════════════════════════════════════════ */
.sec-head { display:flex; align-items:flex-end; justify-content:space-between; gap:16px; margin-bottom:20px; }
.sec-head-left { }
.sec-eyebrow { font-size:11px; font-weight:700; letter-spacing:.1em; text-transform:uppercase; color:var(--c-blue); margin-bottom:4px; }
.sec-title { font-size:1.2rem; font-weight:800; color:var(--c-txt); }
.sec-link { font-size:13px; font-weight:600; color:var(--c-blue); display:flex; align-items:center; gap:4px; }
.sec-link:hover { color:#60a5fa; }

/* ══════════════════════════════════════════════════════
   COURSE CARDS  (main grid)
══════════════════════════════════════════════════════ */
.courses-grid {
  display:grid;
  grid-template-columns:repeat(auto-fill,minmax(260px,1fr));
  gap:20px;
  margin-bottom:52px;
}
.course-card {
  position:relative; height:280px; border-radius:var(--r-lg);
  overflow:hidden; text-decoration:none;
  background:#1a3560 center/cover no-repeat;
  border:1px solid rgba(255,255,255,.07);
  box-shadow:var(--shadow);
  display:flex; flex-direction:column; justify-content:flex-end;
  transition:transform .3s cubic-bezier(.34,1.56,.64,1), box-shadow .3s, border-color .3s;
}
.course-card::before {
  content:''; position:absolute; inset:0;
  background:linear-gradient(180deg,rgba(7,17,29,.1) 0%,rgba(7,17,29,.95) 100%);
  transition:opacity .3s;
}
.course-card:hover {
  transform:translateY(-8px) scale(1.02);
  box-shadow:0 28px 72px rgba(0,0,0,.7), 0 0 50px rgba(45,107,228,.25);
  border-color:rgba(45,107,228,.5);
  text-decoration:none;
}
.course-card-body { position:relative; z-index:1; padding:20px; }
.course-card-pills { display:flex; gap:6px; margin-bottom:10px; }
.course-card-pill {
  display:inline-flex; align-items:center; gap:4px;
  font-size:10px; font-weight:700; letter-spacing:.05em; text-transform:uppercase;
  padding:3px 9px; border-radius:999px;
  background:rgba(45,107,228,.3); border:1px solid rgba(45,107,228,.5); color:#93c5fd;
}
.course-card-pill.enrolled { background:rgba(16,185,129,.25); border-color:rgba(16,185,129,.4); color:#34d399; }
.course-card-title { font-size:14.5px; font-weight:700; color:#fff; line-height:1.3; margin-bottom:8px; }
.course-card-meta { font-size:11.5px; color:rgba(255,255,255,.45); display:flex; align-items:center; gap:6px; }
.course-card-progress { margin-top:10px; }
.progress-bar { height:3px; background:rgba(255,255,255,.12); border-radius:99px; overflow:hidden; }
.progress-fill { height:100%; border-radius:99px; background:linear-gradient(90deg,var(--c-blue),#60a5fa); }

/* ══════════════════════════════════════════════════════
   SEARCH BAR
══════════════════════════════════════════════════════ */
.search-bar {
  display:flex; align-items:center; gap:10px;
  background:var(--c-glass); border:1px solid var(--c-border);
  border-radius:var(--r-sm); padding:0 14px; max-width:280px;
  backdrop-filter:var(--blur); transition:border-color var(--t), box-shadow var(--t);
}
.search-bar:focus-within { border-color:var(--c-blue); box-shadow:0 0 0 3px rgba(45,107,228,.15); }
.search-bar svg { color:var(--c-txt3); flex-shrink:0; }
.search-bar input { border:0; background:transparent; padding:10px 0; font-size:13.5px; flex:1; color:var(--c-txt); min-width:0; }
.search-bar input::placeholder { color:var(--c-txt3); }
.search-bar input:focus { outline:none; }
@keyframes autofillDetect { from {} to {} }
#course-search:-webkit-autofill { animation-name:autofillDetect; animation-duration:1ms; }

/* ══════════════════════════════════════════════════════
   LABS
══════════════════════════════════════════════════════ */
.labs-grid { display:grid; grid-template-columns:repeat(auto-fill,minmax(310px,1fr)); gap:20px; margin-bottom:40px; }
.lab-card {
  background:var(--c-glass); border:1px solid var(--c-border);
  border-radius:var(--r-lg); padding:26px; backdrop-filter:var(--blur);
  box-shadow:var(--shadow-sm);
  display:flex; flex-direction:column; gap:18px;
  transition:transform var(--t), border-color var(--t), box-shadow var(--t);
}
.lab-card:hover { transform:translateY(-4px); border-color:rgba(45,107,228,.4); box-shadow:var(--shadow), 0 0 40px rgba(45,107,228,.12); }
.lab-card-head { display:flex; align-items:center; gap:16px; }
.lab-icon {
  width:54px; height:54px; border-radius:16px; flex-shrink:0;
  background:linear-gradient(135deg,rgba(45,107,228,.2),rgba(124,58,237,.15));
  border:1px solid rgba(45,107,228,.25);
  display:flex; align-items:center; justify-content:center; color:#60a5fa;
  font-size:22px;
  box-shadow:0 0 24px rgba(45,107,228,.15);
}
.lab-name { font-size:17px; font-weight:700; color:var(--c-txt); }
.lab-dns  { font-size:12px; color:var(--c-txt3); font-family:monospace; margin-top:3px; }
.lab-cost { font-size:14px; color:var(--c-txt2); }
.lab-cost-val { font-size:22px; font-weight:800; color:var(--c-blue); vertical-align:middle; }

.res-bar {
  background:linear-gradient(135deg,rgba(16,185,129,.12),rgba(5,150,105,.08));
  border:1px solid rgba(16,185,129,.25); border-radius:var(--r-lg);
  padding:20px 24px; display:flex; align-items:center; gap:18px;
  margin-bottom:28px; box-shadow:0 0 32px rgba(16,185,129,.08);
}
.res-bar-icon { width:46px; height:46px; border-radius:50%; background:linear-gradient(135deg,#10b981,#059669); display:flex; align-items:center; justify-content:center; color:#fff; flex-shrink:0; box-shadow:0 0 20px rgba(16,185,129,.4); }
.res-bar-title { font-size:15px; font-weight:700; color:var(--c-txt); }
.res-bar-info  { font-size:13px; color:var(--c-txt2); margin-top:3px; }

/* ══════════════════════════════════════════════════════
   PROFILE
══════════════════════════════════════════════════════ */
.profile-shell { display:grid; grid-template-columns:300px 1fr; gap:24px; align-items:start; }
.profile-card {
  background:var(--c-glass); border:1px solid var(--c-border);
  border-radius:var(--r-xl); overflow:hidden; backdrop-filter:var(--blur);
  box-shadow:var(--shadow);
}
.profile-card-cover {
  height:90px;
  background:linear-gradient(135deg,#0c1e3d,#163068 50%,#2d6be4);
  position:relative;
  border-radius:var(--r-xl) var(--r-xl) 0 0;
}
.profile-card-av-wrap { padding:0 22px; }
.profile-card-av {
  width:78px; height:78px; border-radius:50%;
  background:linear-gradient(135deg,var(--c-blue),var(--c-purple));
  border:4px solid var(--c-bg); margin-top:-39px;
  display:flex; align-items:center; justify-content:center;
  font-size:28px; font-weight:900; color:#fff;
  box-shadow:0 0 32px rgba(45,107,228,.5);
}
.profile-card-info { padding:12px 22px 22px; }
.profile-card-name  { font-size:1.1rem; font-weight:800; color:var(--c-txt); margin-bottom:2px; }
.profile-card-email { font-size:13px; color:var(--c-txt3); margin-bottom:16px; }
.profile-card-row { display:flex; justify-content:space-between; align-items:center; padding:10px 0; border-top:1px solid var(--c-border); font-size:13.5px; color:var(--c-txt2); }
.profile-card-row strong { color:var(--c-txt); font-weight:700; }

.profile-right { display:flex; flex-direction:column; gap:20px; }
.glass-box { background:var(--c-glass); border:1px solid var(--c-border); border-radius:var(--r-xl); backdrop-filter:var(--blur); box-shadow:var(--shadow-sm); }
.glass-box-head { padding:20px 24px 0; font-size:1rem; font-weight:700; color:var(--c-txt); }
.glass-box-body { padding:20px 24px 24px; }

/* ══════════════════════════════════════════════════════
   SUPPORT / CHAT
══════════════════════════════════════════════════════ */
.support-shell { display:grid; grid-template-columns:1fr 280px; gap:24px; align-items:start; }
.chat-card { background:var(--c-glass); border:1px solid var(--c-border); border-radius:var(--r-xl); overflow:hidden; backdrop-filter:var(--blur); box-shadow:var(--shadow); display:flex; flex-direction:column; }
.chat-card-head { padding:18px 22px; border-bottom:1px solid var(--c-border); display:flex; align-items:center; gap:10px; }
.chat-card-head h2 { font-size:1rem; font-weight:700; color:var(--c-txt); }
.chat-online { width:8px; height:8px; border-radius:50%; background:var(--c-green); box-shadow:0 0 10px var(--c-green); animation:pulse-green 2s ease-in-out infinite; }
@keyframes pulse-green { 0%,100%{opacity:1}50%{opacity:.4} }
.chat-msgs { flex:1; padding:18px; max-height:420px; overflow-y:auto; display:flex; flex-direction:column; gap:14px; }
.chat-bubble { max-width:80%; display:flex; flex-direction:column; gap:4px; }
.chat-bubble-user { align-self:flex-start; }
.chat-bubble-support { align-self:flex-end; }
.chat-bubble-sender { font-size:10px; font-weight:700; text-transform:uppercase; letter-spacing:.06em; color:var(--c-txt3); padding:0 4px; }
.chat-bubble-support .chat-bubble-sender { text-align:right; color:#60a5fa; }
.chat-bubble-msg { padding:12px 16px; border-radius:16px; font-size:14px; line-height:1.55; }
.chat-bubble-user .chat-bubble-msg { background:rgba(255,255,255,.07); border:1px solid var(--c-border); color:var(--c-txt); border-bottom-left-radius:4px; }
.chat-bubble-support .chat-bubble-msg { background:linear-gradient(135deg,rgba(45,107,228,.22),rgba(45,107,228,.1)); border:1px solid rgba(45,107,228,.3); color:#dbeafe; border-bottom-right-radius:4px; }
.chat-bubble-time { font-size:11px; color:var(--c-txt3); padding:0 4px; }
.chat-bubble-support .chat-bubble-time { text-align:right; }
.chat-empty-state { text-align:center; padding:48px 20px; color:var(--c-txt3); font-size:14px; }
.chat-input { padding:14px 18px; border-top:1px solid var(--c-border); display:flex; gap:10px; align-items:flex-end; }
.chat-input textarea { flex:1; background:rgba(255,255,255,.06); border:1px solid var(--c-border); border-radius:12px; padding:11px 14px; color:var(--c-txt); font:14px/1.5 'Inter',sans-serif; resize:none; min-height:44px; max-height:100px; transition:border-color var(--t); }
.chat-input textarea::placeholder { color:var(--c-txt3); }
.chat-input textarea:focus { outline:none; border-color:rgba(45,107,228,.5); background:rgba(45,107,228,.06); }
.chat-send-btn { width:44px; height:44px; border-radius:12px; border:none; background:linear-gradient(135deg,var(--c-blue),var(--c-blue2)); color:#fff; cursor:pointer; display:flex; align-items:center; justify-content:center; flex-shrink:0; box-shadow:0 4px 16px rgba(45,107,228,.4); transition:all var(--t); }
.chat-send-btn:hover { transform:translateY(-1px); box-shadow:0 6px 24px rgba(45,107,228,.6); }

.info-card { background:var(--c-glass); border:1px solid var(--c-border); border-radius:var(--r-lg); padding:20px; backdrop-filter:var(--blur); }
.info-card + .info-card { margin-top:14px; }
.info-card-title { font-size:13.5px; font-weight:700; color:var(--c-txt); margin-bottom:8px; display:flex; align-items:center; gap:7px; }
.info-card-body  { font-size:13px; color:var(--c-txt2); line-height:1.65; }

/* ══════════════════════════════════════════════════════
   ANNOUNCEMENTS
══════════════════════════════════════════════════════ */
.ann-list { display:flex; flex-direction:column; gap:10px; margin-bottom:28px; }
.ann-item {
  display:flex; align-items:flex-start; gap:14px; padding:14px 18px;
  background:rgba(45,107,228,.08); border:1px solid rgba(45,107,228,.2);
  border-radius:var(--r-lg); backdrop-filter:var(--blur);
  animation:fade-up .3s ease;
}
@keyframes fade-up { from{opacity:0;transform:translateY(-8px)} to{opacity:1;transform:none} }
.ann-pulse { width:8px; height:8px; border-radius:50%; background:var(--c-blue); box-shadow:0 0 12px var(--c-blue); margin-top:5px; flex-shrink:0; }
.ann-text { flex:1; }
.ann-text strong { font-size:13.5px; color:#93c5fd; display:block; margin-bottom:3px; }
.ann-text span { font-size:13px; color:rgba(147,197,253,.7); line-height:1.5; }
.ann-close { background:none; border:none; color:rgba(147,197,253,.4); font-size:18px; cursor:pointer; padding:0 4px; line-height:1; flex-shrink:0; transition:color var(--t); }
.ann-close:hover { color:#93c5fd; }

/* ══════════════════════════════════════════════════════
   BUTTONS
══════════════════════════════════════════════════════ */
.btn {
  display:inline-flex; align-items:center; justify-content:center; gap:7px;
  border:1px solid transparent; border-radius:var(--r-sm);
  padding:10px 20px; min-height:40px; font-size:14px; font-weight:600;
  cursor:pointer; text-decoration:none; white-space:nowrap;
  transition:all var(--t); background:linear-gradient(135deg,var(--c-blue),var(--c-blue2));
  color:#fff; box-shadow:0 2px 8px rgba(45,107,228,.35);
}
.btn:hover { background:linear-gradient(135deg,#4d87f0,var(--c-blue)); color:#fff; text-decoration:none; box-shadow:0 4px 20px rgba(45,107,228,.55); transform:translateY(-1px); }
.btn:active { transform:none; }
.btn-ghost { background:var(--c-glass); border-color:var(--c-border2); color:var(--c-txt2); box-shadow:none; }
.btn-ghost:hover { background:var(--c-glass2); color:var(--c-txt); border-color:var(--c-border2); box-shadow:none; transform:translateY(-1px); }
.btn-danger { background:linear-gradient(135deg,var(--c-red),#dc2626); box-shadow:0 2px 8px rgba(239,68,68,.35); }
.btn-danger:hover { box-shadow:0 4px 20px rgba(239,68,68,.5); }
.btn-sm { padding:6px 13px; min-height:32px; font-size:13px; }
/* Legacy compatibility */
.button { display:inline-flex; align-items:center; justify-content:center; gap:7px; border:1px solid transparent; border-radius:var(--r-sm); padding:10px 20px; min-height:40px; font-size:14px; font-weight:600; cursor:pointer; text-decoration:none; white-space:nowrap; transition:all var(--t); background:linear-gradient(135deg,var(--c-blue),var(--c-blue2)); color:#fff; box-shadow:0 2px 8px rgba(45,107,228,.35); }
.button:hover { background:linear-gradient(135deg,#4d87f0,var(--c-blue)); color:#fff; text-decoration:none; box-shadow:0 4px 20px rgba(45,107,228,.55); transform:translateY(-1px); }
.button.secondary { background:var(--c-glass); border-color:var(--c-border2); color:var(--c-txt2); box-shadow:none; }
.button.secondary:hover { background:var(--c-glass2); color:var(--c-txt); box-shadow:var(--shadow-sm); transform:translateY(-1px); }
.button.danger { background:linear-gradient(135deg,var(--c-red),#dc2626); box-shadow:0 2px 8px rgba(239,68,68,.3); }
.button.danger:hover { box-shadow:0 4px 20px rgba(239,68,68,.5); }
.button.compact { padding:6px 13px; min-height:32px; font-size:13px; }
.button.ghost { background:transparent; color:var(--c-blue); border-color:transparent; box-shadow:none; }
.button.ghost:hover { background:rgba(45,107,228,.1); box-shadow:none; transform:none; }

/* ══════════════════════════════════════════════════════
   FORMS
══════════════════════════════════════════════════════ */
.form-grid { display:grid; gap:18px; }
.field { display:grid; gap:7px; }
.field label { font-size:13px; font-weight:600; color:var(--c-txt2); letter-spacing:.01em; }
.field input,.field textarea,.field select {
  width:100%; border:1.5px solid var(--c-border);
  border-radius:var(--r-sm); padding:11px 14px;
  background:rgba(255,255,255,.05); color:var(--c-txt); font-size:14px;
  backdrop-filter:blur(8px); transition:border-color var(--t), box-shadow var(--t), background var(--t);
}
.field input::placeholder,.field textarea::placeholder { color:var(--c-txt3); }
.field input:focus,.field textarea:focus,.field select:focus { outline:none; border-color:var(--c-blue); background:rgba(45,107,228,.07); box-shadow:0 0 0 3px rgba(45,107,228,.15); }
.field select option { background:#0c1a2e; color:var(--c-txt); }
.field textarea { min-height:120px; resize:vertical; line-height:1.6; }

/* ══════════════════════════════════════════════════════
   BADGES / ALERTS
══════════════════════════════════════════════════════ */
.badge { display:inline-flex; align-items:center; gap:4px; padding:3px 10px; border-radius:999px; font-size:11.5px; font-weight:700; }
.badge.success { background:rgba(16,185,129,.15); color:#34d399; border:1px solid rgba(16,185,129,.2); }
.badge.danger  { background:rgba(239,68,68,.15);  color:#f87171; border:1px solid rgba(239,68,68,.2); }
.badge.warning { background:rgba(245,158,11,.15); color:#fcd34d; border:1px solid rgba(245,158,11,.2); }
.badge.primary { background:rgba(45,107,228,.15); color:#93c5fd; border:1px solid rgba(45,107,228,.2); }
.badge.neutral { background:var(--c-glass); color:var(--c-txt2); border:1px solid var(--c-border); }

.alert { border-radius:var(--r-sm); padding:13px 16px; margin-bottom:16px; font-size:14px; border-left:3px solid var(--c-border); background:var(--c-glass); backdrop-filter:var(--blur); color:var(--c-txt2); }
.alert.success { border-left-color:var(--c-green); background:rgba(16,185,129,.1); color:#6ee7b7; }
.alert.error   { border-left-color:var(--c-red);   background:rgba(239,68,68,.1);  color:#fca5a5; }

/* ══════════════════════════════════════════════════════
   TABLES
══════════════════════════════════════════════════════ */
.table-wrap { overflow-x:auto; border-radius:var(--r); border:1px solid var(--c-border); }
table { width:100%; border-collapse:collapse; font-size:14px; }
thead th { background:rgba(255,255,255,.03); padding:12px 14px; text-align:left; font-weight:700; font-size:11px; text-transform:uppercase; letter-spacing:.07em; color:var(--c-txt3); border-bottom:1px solid var(--c-border); }
tbody tr { transition:background var(--t); }
tbody tr:hover { background:rgba(45,107,228,.07); }
tbody td { padding:12px 14px; border-bottom:1px solid var(--c-border); vertical-align:middle; color:var(--c-txt2); }
tbody tr:last-child td { border-bottom:none; }
code { background:rgba(255,255,255,.08); padding:2px 7px; border-radius:5px; font-size:13px; color:#93c5fd; font-family:monospace; }
.pagination { display:flex; align-items:center; gap:8px; margin-top:20px; flex-wrap:wrap; }

/* ══════════════════════════════════════════════════════
   STAT CARDS (admin compat)
══════════════════════════════════════════════════════ */
.grid { display:grid; gap:18px; }
.cols-2 { grid-template-columns:repeat(2,minmax(0,1fr)); }
.cols-3 { grid-template-columns:repeat(3,minmax(0,1fr)); }
.cols-4 { grid-template-columns:repeat(4,minmax(0,1fr)); }
.panel { background:var(--c-glass); border:1px solid var(--c-border); border-radius:var(--r-lg); padding:22px 24px; backdrop-filter:var(--blur); box-shadow:var(--shadow-sm); transition:border-color var(--t),box-shadow var(--t); }
.panel:hover { border-color:var(--c-border2); box-shadow:var(--shadow); }
.panel h2 { margin-top:0; font-size:1rem; font-weight:700; color:var(--c-txt); }
.panel h3 { margin-top:0; font-size:.95rem; font-weight:600; color:var(--c-txt2); }
.card { background:var(--c-glass); border:1px solid var(--c-border); border-radius:var(--r-lg); backdrop-filter:var(--blur); }
.stat-card { background:var(--c-glass); border:1px solid var(--c-border); border-radius:var(--r-lg); padding:22px 24px; backdrop-filter:var(--blur); box-shadow:var(--shadow-sm); display:flex; align-items:center; gap:16px; transition:all var(--t); }
.stat-card:hover { transform:translateY(-3px); box-shadow:var(--shadow); border-color:rgba(45,107,228,.3); }
.stat-icon { width:52px; height:52px; border-radius:14px; display:flex; align-items:center; justify-content:center; flex-shrink:0; }
.stat-icon.blue   { background:rgba(45,107,228,.15);  color:#60a5fa; box-shadow:0 0 20px rgba(45,107,228,.15); }
.stat-icon.green  { background:rgba(16,185,129,.15);  color:#34d399; box-shadow:0 0 20px rgba(16,185,129,.15); }
.stat-icon.purple { background:rgba(124,58,237,.15);  color:#a78bfa; box-shadow:0 0 20px rgba(124,58,237,.15); }
.stat-icon.orange { background:rgba(245,158,11,.15);  color:#fcd34d; box-shadow:0 0 20px rgba(245,158,11,.15); }
.stat-val { font-size:1.9rem; font-weight:900; line-height:1; color:var(--c-txt); letter-spacing:-.03em; }
.stat-lbl { font-size:12.5px; color:var(--c-txt3); margin-top:4px; font-weight:500; }
.admin-section-title { font-size:11px; font-weight:700; text-transform:uppercase; letter-spacing:.08em; color:var(--c-txt3); margin:0 0 12px; }
.muted   { color:var(--c-txt2); }
.text-sm { font-size:13px; }
.text-xs { font-size:12px; }
.topbar  { display:flex; justify-content:space-between; align-items:center; gap:16px; margin-bottom:24px; flex-wrap:wrap; }
.topbar h1 { font-size:1.5rem; font-weight:800; color:var(--c-txt); }

/* ══════════════════════════════════════════════════════
   LOGIN PAGE
══════════════════════════════════════════════════════ */
.auth-root {
  min-height:100vh; display:flex;
  background: linear-gradient(135deg,#050d1a 0%,#07111d 100%);
  position:relative; overflow:hidden;
}
.auth-root::before { content:''; position:absolute; inset:0; background:radial-gradient(ellipse 60% 60% at 10% 20%,rgba(45,107,228,.18) 0%,transparent 60%),radial-gradient(ellipse 50% 60% at 90% 80%,rgba(124,58,237,.14) 0%,transparent 60%); pointer-events:none; }
.auth-left {
  flex:1; display:flex; flex-direction:column; justify-content:center;
  padding:64px 72px; position:relative; z-index:1; max-width:560px;
}
.auth-left-logo { display:flex; align-items:center; gap:10px; font-size:1.3rem; font-weight:900; color:#fff; letter-spacing:-.03em; margin-bottom:56px; }
.auth-left-logo-dot { width:10px; height:10px; border-radius:50%; background:var(--c-blue); box-shadow:0 0 16px var(--c-blue); }
.auth-tagline { font-size:2.4rem; font-weight:900; color:#fff; line-height:1.1; letter-spacing:-.04em; margin-bottom:16px; }
.auth-tagline span { background:linear-gradient(135deg,#60a5fa,#a78bfa); -webkit-background-clip:text; -webkit-text-fill-color:transparent; }
.auth-desc { font-size:15px; color:rgba(255,255,255,.45); line-height:1.7; margin-bottom:40px; }
.auth-features { display:flex; flex-direction:column; gap:14px; }
.auth-feat { display:flex; align-items:center; gap:12px; font-size:14px; color:rgba(255,255,255,.55); }
.auth-feat-icon { width:32px; height:32px; border-radius:9px; display:flex; align-items:center; justify-content:center; flex-shrink:0; }
.auth-feat-icon.blue   { background:rgba(45,107,228,.2);  color:#60a5fa; }
.auth-feat-icon.purple { background:rgba(124,58,237,.2); color:#a78bfa; }
.auth-feat-icon.green  { background:rgba(16,185,129,.2);  color:#34d399; }
.auth-feat-icon.yellow { background:rgba(245,158,11,.2);  color:#fcd34d; }

.auth-right {
  width:480px; flex-shrink:0; display:flex; align-items:center; justify-content:center;
  padding:32px; position:relative; z-index:1;
  border-left:1px solid rgba(255,255,255,.05);
  background:rgba(255,255,255,.02); backdrop-filter:blur(20px);
}
.auth-box { width:100%; max-width:400px; }
.auth-box-title { font-size:1.5rem; font-weight:800; color:var(--c-txt); margin-bottom:6px; }
.auth-box-sub   { font-size:14px; color:var(--c-txt3); margin-bottom:28px; }
.auth-or { display:flex; align-items:center; gap:12px; color:var(--c-txt3); font-size:12px; margin:24px 0; }
.auth-or::before,.auth-or::after { content:''; flex:1; height:1px; background:var(--c-border); }

/* ══════════════════════════════════════════════════════
   COMMUNITY
══════════════════════════════════════════════════════ */
.comm-topnav-extra { background:rgba(7,17,29,.8); backdrop-filter:var(--blur); border-bottom:1px solid var(--c-border); padding:0 32px; }
.comm-sub-tabs { display:flex; gap:0; max-width:1600px; margin:0 auto; overflow-x:auto; scrollbar-width:none; }
.comm-sub-tabs::-webkit-scrollbar { display:none; }
.comm-sub-tab { padding:13px 18px; font-size:13.5px; font-weight:500; color:var(--c-txt3); border:none; background:transparent; cursor:pointer; border-bottom:2px solid transparent; white-space:nowrap; transition:color var(--t),border-color var(--t); text-decoration:none; display:inline-block; }
.comm-sub-tab:hover { color:var(--c-txt); text-decoration:none; }
.comm-sub-tab.active { color:#60a5fa; border-bottom-color:var(--c-blue); }

.comm-page { max-width:1600px; margin:0 auto; padding:36px 32px 80px; position:relative; z-index:1; }
.comm-hero { border-radius:var(--r-xl); background:linear-gradient(125deg,#0c1e3d,#163068 40%,#2d6be4); padding:40px 48px; margin-bottom:36px; position:relative; overflow:hidden; border:1px solid rgba(45,107,228,.3); box-shadow:var(--shadow-lg); }
.comm-hero::before { content:''; position:absolute; top:-60px; right:-60px; width:240px; height:240px; border-radius:50%; background:radial-gradient(circle,rgba(255,255,255,.07) 0%,transparent 70%); }
.comm-hero-title { font-size:1.8rem; font-weight:900; color:#fff; margin-bottom:6px; }
.comm-hero-sub   { font-size:14px; color:rgba(255,255,255,.55); }
.comm-hero-action { margin-top:24px; }

.posts-grid { display:grid; grid-template-columns:repeat(auto-fill,minmax(340px,1fr)); gap:18px; margin-bottom:28px; }
.post-card {
  background:var(--c-glass); border:1px solid var(--c-border);
  border-radius:var(--r-lg); padding:24px; backdrop-filter:var(--blur);
  box-shadow:var(--shadow-sm); display:flex; flex-direction:column; gap:14px;
  transition:all var(--t); cursor:pointer;
}
.post-card:hover { transform:translateY(-4px); border-color:rgba(45,107,228,.35); box-shadow:var(--shadow),0 0 40px rgba(45,107,228,.1); }
.post-card-author { display:flex; align-items:center; gap:10px; }
.post-card-av { width:36px; height:36px; border-radius:50%; background:linear-gradient(135deg,var(--c-blue),var(--c-purple)); display:flex; align-items:center; justify-content:center; font-size:14px; font-weight:700; color:#fff; flex-shrink:0; }
.post-card-name { font-size:13px; font-weight:600; color:var(--c-txt); }
.post-card-date { font-size:12px; color:var(--c-txt3); }
.post-card-title { font-size:15.5px; font-weight:700; color:var(--c-txt); line-height:1.35; }
.post-card-title a { color:inherit; }
.post-card-title a:hover { color:#60a5fa; text-decoration:none; }
.post-card-excerpt { font-size:13.5px; color:var(--c-txt2); line-height:1.65; flex:1; }
.post-card-footer { display:flex; align-items:center; justify-content:space-between; gap:8px; padding-top:12px; border-top:1px solid var(--c-border); }
.post-card-comment { display:flex; align-items:center; gap:5px; font-size:12px; color:var(--c-txt3); }
.post-card-read { font-size:12.5px; font-weight:600; color:var(--c-blue); }
.post-card-read:hover { color:#60a5fa; text-decoration:none; }

.comm-search { display:flex; align-items:center; gap:14px; margin-bottom:24px; flex-wrap:wrap; }
.comm-search .search-bar { flex:1; max-width:none; }
.comm-empty { display:flex; flex-direction:column; align-items:center; gap:14px; padding:80px 24px; color:var(--c-txt3); text-align:center; border:1px dashed var(--c-border); border-radius:var(--r-xl); background:var(--c-glass); backdrop-filter:var(--blur); }

.comm-avatar { display:inline-flex; align-items:center; justify-content:center; width:36px; height:36px; border-radius:50%; background:linear-gradient(135deg,var(--c-blue),var(--c-purple)); color:#fff; font-size:14px; font-weight:700; flex-shrink:0; }
.comm-avatar-lg { width:48px; height:48px; font-size:18px; }
.comm-back { display:inline-flex; align-items:center; gap:6px; font-size:13px; color:var(--c-txt3); margin-bottom:22px; font-weight:500; transition:color var(--t); }
.comm-back:hover { color:var(--c-blue); text-decoration:none; }
.comm-author-name { font-weight:600; font-size:13px; color:var(--c-txt); }

.post-view { max-width:800px; margin:0 auto; }
.post-view-article { background:var(--c-glass); border:1px solid var(--c-border); border-radius:var(--r-xl); padding:40px 44px; backdrop-filter:var(--blur); box-shadow:var(--shadow); margin-bottom:20px; }
.post-view-header { display:flex; align-items:center; gap:14px; margin-bottom:24px; }
.post-view-author { display:flex; flex-direction:column; gap:3px; }
.post-view-title { font-size:1.75rem; font-weight:900; color:var(--c-txt); line-height:1.2; letter-spacing:-.025em; margin-bottom:16px; }
.post-view-divider { height:1px; background:var(--c-border); margin-bottom:20px; }
.post-view-body { font-size:15px; line-height:1.8; color:var(--c-txt2); white-space:pre-wrap; word-break:break-word; }

.comments-section { background:var(--c-glass); border:1px solid var(--c-border); border-radius:var(--r-xl); padding:28px 32px; backdrop-filter:var(--blur); box-shadow:var(--shadow-sm); margin-bottom:20px; }
.comments-header { display:flex; align-items:center; gap:8px; margin-bottom:22px; }
.comments-header h2 { font-size:1rem; font-weight:700; color:var(--c-txt); margin:0; }
.comment-list { display:flex; flex-direction:column; }
.comment-item { display:flex; gap:14px; padding:16px 0; border-bottom:1px solid var(--c-border); }
.comment-item:last-child { border-bottom:none; }
.comment-body { flex:1; min-width:0; }
.comment-meta { display:flex; align-items:center; gap:10px; margin-bottom:7px; }
.comment-text { font-size:14px; line-height:1.7; color:var(--c-txt2); white-space:pre-wrap; word-break:break-word; }
.comment-time { font-size:12px; color:var(--c-txt3); }
.no-comments { color:var(--c-txt3); font-size:14px; padding:20px 0; text-align:center; }

.reply-box { background:var(--c-glass); border:1px solid var(--c-border); border-radius:var(--r-xl); padding:28px 32px; backdrop-filter:var(--blur); box-shadow:var(--shadow-sm); }
.reply-box h3 { font-size:1rem; font-weight:700; color:var(--c-txt); margin-bottom:14px; }
.reply-textarea { width:100%; min-height:110px; resize:vertical; border:1.5px solid var(--c-border); border-radius:var(--r-sm); padding:12px 14px; font:14px/1.6 'Inter',sans-serif; color:var(--c-txt); background:rgba(255,255,255,.05); backdrop-filter:var(--blur); transition:all var(--t); }
.reply-textarea::placeholder { color:var(--c-txt3); }
.reply-textarea:focus { outline:none; border-color:var(--c-blue); background:rgba(45,107,228,.06); box-shadow:0 0 0 3px rgba(45,107,228,.12); }
.reply-footer { display:flex; justify-content:flex-end; margin-top:12px; }

.new-post-page { max-width:1100px; margin:36px auto 80px; padding:0 32px; position:relative; z-index:1; }
.new-post-header { margin-bottom:28px; }
.new-post-header h1 { font-size:1.6rem; font-weight:900; color:var(--c-txt); margin-bottom:6px; }
.new-post-header p { font-size:14px; color:var(--c-txt3); }
.new-post-form { background:var(--c-glass); border:1px solid var(--c-border); border-radius:var(--r-xl); padding:32px; backdrop-filter:var(--blur); box-shadow:var(--shadow); display:grid; gap:20px; }
.new-post-textarea { min-height:400px; resize:vertical; }
.new-post-actions { display:flex; gap:10px; justify-content:flex-end; }

/* ══════════════════════════════════════════════════════
   COURSE PLAYER (kept functional, restyled)
══════════════════════════════════════════════════════ */
.course-layout { display:grid; grid-template-columns:300px 1fr; min-height:100vh; }
.course-sidebar { background:var(--c-bg1); border-right:1px solid var(--c-border); height:100vh; overflow-y:auto; position:sticky; top:0; }
.cs-header { padding:18px; border-bottom:1px solid var(--c-border); position:sticky; top:0; z-index:10; background:var(--c-bg1); }
.cs-back { display:inline-flex; align-items:center; gap:5px; font-size:12px; color:var(--c-txt3); text-decoration:none; margin-bottom:8px; font-weight:500; transition:color var(--t); }
.cs-back:hover { color:var(--c-blue); text-decoration:none; }
.cs-title { font-size:13.5px; font-weight:700; color:var(--c-txt); line-height:1.35; word-break:break-word; }
.cs-progress { margin-top:12px; }
.cs-progress-label { display:flex; justify-content:space-between; font-size:11px; color:var(--c-txt3); margin-bottom:5px; }
.cs-progress-bar { height:4px; border-radius:99px; background:rgba(255,255,255,.08); overflow:hidden; }
.cs-progress-fill { height:100%; border-radius:99px; background:linear-gradient(90deg,var(--c-blue),#60a5fa); transition:width .4s ease; }
.cs-empty { color:var(--c-txt3); font-size:13px; padding:20px 18px; }
.cs-section { margin-bottom:4px; }
.cs-section-header { display:flex; align-items:center; gap:8px; padding:10px 18px 6px; }
.cs-section-index { display:inline-flex; align-items:center; justify-content:center; width:20px; height:20px; border-radius:50%; background:linear-gradient(135deg,var(--c-blue),var(--c-blue2)); color:#fff; font-size:10px; font-weight:700; flex-shrink:0; }
.cs-section-name { font-size:11px; font-weight:700; text-transform:uppercase; letter-spacing:.07em; color:var(--c-txt3); }
.cs-videos { display:flex; flex-direction:column; }
.cs-video-num { display:inline-flex; align-items:center; justify-content:center; min-width:22px; height:22px; border-radius:4px; background:rgba(255,255,255,.06); color:var(--c-txt3); font-size:11px; font-weight:600; flex-shrink:0; }
.cs-video-name { flex:1; line-height:1.35; word-break:break-word; color:var(--c-txt2); font-size:13px; }
.cs-video-item { display:flex; align-items:center; gap:0; border-left:3px solid transparent; transition:background var(--t),border-color var(--t); }
.cs-video-item:hover { background:rgba(45,107,228,.07); }
.cs-video-item.active { background:rgba(45,107,228,.1); border-left-color:var(--c-blue); }
.cs-video-item.active .cs-video-num { background:var(--c-blue); color:#fff; }
.cs-check-btn { flex-shrink:0; display:flex; align-items:center; justify-content:center; width:26px; height:26px; margin-left:12px; border-radius:50%; border:1.5px solid rgba(255,255,255,.12); background:rgba(255,255,255,.04); cursor:pointer; color:transparent; transition:all var(--t); }
.cs-check-btn:hover { border-color:var(--c-blue); color:var(--c-blue); background:rgba(45,107,228,.1); }
.cs-video-item.completed .cs-check-btn { background:linear-gradient(135deg,var(--c-blue),var(--c-blue2)); border-color:var(--c-blue); color:#fff; box-shadow:0 0 12px rgba(45,107,228,.4); }
.cs-video-link { display:flex; align-items:center; gap:10px; flex:1; padding:9px 18px 9px 8px; text-decoration:none; cursor:pointer; transition:color var(--t); }
.cs-video-link:hover { color:var(--c-blue); text-decoration:none; }
.cs-video-item.active .cs-video-link { color:#93c5fd; font-weight:600; }
.cs-video-item.completed .cs-video-link { opacity:.65; }
.cs-video-item.completed .cs-video-name { text-decoration:line-through; }
.cs-video-item.completed.active .cs-video-link { opacity:1; color:#93c5fd; }
.cs-video-item.completed.active .cs-video-name { text-decoration:none; }
.video-stage { background:var(--c-bg); padding:28px; min-height:100vh; }
.vs-player-wrap { display:flex; flex-direction:column; gap:16px; }
.vs-placeholder { display:flex; flex-direction:column; align-items:center; justify-content:center; gap:16px; min-height:400px; border-radius:var(--r-xl); background:linear-gradient(135deg,var(--c-bg1),var(--c-bg2)); color:rgba(255,255,255,.35); text-align:center; padding:40px; border:1px solid var(--c-border); box-shadow:var(--shadow-lg); }
.vs-info h2 { margin:4px 0 0; font-size:18px; font-weight:700; color:var(--c-txt); }
.video-stage video { width:100%; max-height:72vh; background:#000; border-radius:var(--r-xl); box-shadow:var(--shadow-xl); }

/* ══════════════════════════════════════════════════════
   LOG VIEWER
══════════════════════════════════════════════════════ */
.log-viewer { min-height:65vh; background:#040c18; color:#58a6ff; border-radius:var(--r-xl); padding:20px 22px; font-family:'JetBrains Mono',Consolas,monospace; font-size:13px; overflow:auto; white-space:pre-wrap; line-height:1.65; border:1px solid rgba(88,166,255,.1); }

/* ══════════════════════════════════════════════════════
   ERROR PAGES
══════════════════════════════════════════════════════ */
.error-page { min-height:100vh; display:grid; place-items:center; padding:40px; }
.error-card { background:var(--c-glass); border:1px solid var(--c-border); border-radius:var(--r-xl); padding:56px 60px; text-align:center; backdrop-filter:var(--blur); box-shadow:var(--shadow-xl); max-width:480px; width:100%; }
.error-code { font-size:5rem; font-weight:900; line-height:1; margin-bottom:8px; background:linear-gradient(135deg,var(--c-blue),var(--c-purple)); -webkit-background-clip:text; -webkit-text-fill-color:transparent; }
.error-title { font-size:1.4rem; font-weight:700; margin-bottom:10px; color:var(--c-txt); }
.error-desc  { color:var(--c-txt3); font-size:15px; margin-bottom:28px; }

/* mobile-topbar compat for course/admin/doc pages */
.mobile-topbar { display:none; position:sticky; top:0; z-index:100; background:var(--c-bg1); padding:12px 16px; align-items:center; justify-content:space-between; border-bottom:1px solid var(--c-border); }
.sidebar-toggle { display:none; background:rgba(255,255,255,.08); border:none; color:rgba(255,255,255,.8); cursor:pointer; padding:7px; border-radius:var(--r-sm); align-items:center; justify-content:center; }
.sidebar-backdrop { display:none; position:fixed; inset:0; background:rgba(0,0,0,.65); z-index:149; backdrop-filter:blur(4px); }
.sidebar-backdrop.open { display:block; }
.brand { display:flex; align-items:center; gap:9px; font-size:1.1rem; font-weight:900; color:#fff; letter-spacing:-.03em; }
.brand-dot { width:9px; height:9px; border-radius:50%; background:var(--c-blue); box-shadow:0 0 12px var(--c-blue); }
.nav-label { font-size:10px; font-weight:800; letter-spacing:.12em; text-transform:uppercase; color:rgba(255,255,255,.2); padding:12px 10px 4px; display:block; }
.nav-divider { height:1px; background:rgba(255,255,255,.05); margin:5px 0; }
.nav-item { display:flex; align-items:center; gap:10px; width:100%; text-align:left; border:1px solid transparent; border-radius:9px; padding:9px 12px; font-size:13.5px; font-weight:500; color:rgba(140,163,190,.9); background:transparent; cursor:pointer; text-decoration:none; transition:all var(--t); }
.nav-item:hover { background:rgba(255,255,255,.07); color:#e2e8f0; text-decoration:none; }
.nav-item.active { background:rgba(45,107,228,.2); color:#93c5fd; font-weight:600; border-color:rgba(45,107,228,.25); }
.nav-badge { margin-left:auto; background:var(--c-red); color:#fff; font-size:10px; font-weight:700; padding:3px 7px; border-radius:10px; min-width:18px; text-align:center; }
/* admin app-shell compat */
.app-shell { display:grid; grid-template-columns:240px minmax(0,1fr); min-height:100vh; }
.sidebar { background:linear-gradient(180deg,#040c18,#07111d); border-right:1px solid var(--c-border); position:sticky; top:0; height:100vh; overflow-y:auto; display:flex; flex-direction:column; scrollbar-width:none; }
.sidebar::-webkit-scrollbar { display:none; }
.sidebar-header { padding:24px 16px 18px; border-bottom:1px solid rgba(255,255,255,.05); }
.sidebar-nav { flex:1; padding:10px; display:flex; flex-direction:column; gap:1px; }
.sidebar-footer { padding:12px 10px; border-top:1px solid rgba(255,255,255,.05); }
.sidebar-user { display:flex; align-items:center; gap:10px; padding:10px; border-radius:10px; background:rgba(255,255,255,.04); border:1px solid rgba(255,255,255,.06); }
.sidebar-user-av { width:36px; height:36px; border-radius:50%; background:linear-gradient(135deg,var(--c-blue),var(--c-purple)); display:flex; align-items:center; justify-content:center; font-weight:800; font-size:14px; color:#fff; flex-shrink:0; box-shadow:0 0 14px rgba(45,107,228,.4); }
.sidebar-user-info { min-width:0; }
.sidebar-user-name { font-size:13px; font-weight:600; color:#e2e8f0; white-space:nowrap; overflow:hidden; text-overflow:ellipsis; }
.sidebar-user-bal  { font-size:11px; color:rgba(255,255,255,.3); }
.main { padding:28px clamp(16px,3vw,48px); min-width:0; max-width:1700px; }

/* ══════════════════════════════════════════════════════
   RESPONSIVE
══════════════════════════════════════════════════════ */
/* ── Tablet ≤1100px ── */
@media (max-width:1100px) {
  .profile-shell { grid-template-columns:1fr; }
  .support-shell { grid-template-columns:1fr; }
}

/* ── Tablet ≤900px ── */
@media (max-width:900px) {
  .topnav { padding:0 16px; }
  .topnav-logo { margin-right:12px; }
  .topnav-tabs .topnav-tab span { display:none; }
  .topnav-tabs .topnav-tab { padding:8px 11px; }
  .page-wrap { padding:0 20px 60px; }
  .hero { padding:28px 24px; }
  .hero-title { font-size:1.7rem; }
  .hero-stat { padding:14px 16px; min-width:80px; }
  .courses-grid { grid-template-columns:repeat(auto-fill,minmax(190px,1fr)); gap:14px; }
  .course-card { height:210px; }
  .comm-page { padding:24px 20px 60px; }
  .comm-hero { padding:28px 24px; }
  .posts-grid { grid-template-columns:1fr; }
  .two-col { grid-template-columns:1fr; }
  .admin-wrap { padding:24px 20px 60px; }
  .stats-row { grid-template-columns:repeat(2,1fr); }
  .admin-topnav { padding:0 16px; }
  .admin-tabs .admin-tab { font-size:12.5px; padding:7px 11px; }
}

/* ── Phone ≤640px — hamburger-free two-row topnav ── */
@media (max-width:640px) {
  /* Topnav becomes two rows: logo+right on row1, tabs scrolling on row2 */
  .topnav {
    height:auto; flex-wrap:wrap; padding:0; gap:0; position:sticky; top:0; z-index:200;
  }
  .topnav-logo {
    padding:13px 16px; flex:1; margin-right:0;
  }
  .topnav-right { padding:10px 16px 10px 0; }
  .topnav-tabs {
    order:10; width:100%;
    border-top:1px solid var(--c-border);
    padding:6px 8px; overflow-x:auto; flex-wrap:nowrap; scrollbar-width:none;
  }
  .topnav-tabs::-webkit-scrollbar { display:none; }
  .topnav-tabs .topnav-tab { flex-shrink:0; padding:7px 12px; font-size:13px; }
  .topnav-tabs .topnav-tab span { display:inline; }

  /* Admin topnav same treatment */
  .admin-topnav { height:auto; flex-wrap:wrap; padding:0; gap:0; }
  .admin-logo   { padding:13px 16px; flex:1; margin-right:0; }
  .admin-right  { padding:10px 16px 10px 0; }
  .admin-tabs {
    order:10; width:100%;
    border-top:1px solid var(--c-border);
    padding:6px 8px; overflow-x:auto; flex-wrap:nowrap; scrollbar-width:none;
  }
  .admin-tabs::-webkit-scrollbar { display:none; }
  .admin-tabs .admin-tab { flex-shrink:0; font-size:13px; padding:7px 12px; }
  .admin-label { display:none; }

  /* Balance: show pill but no text */
  .topnav-balance span { display:none; }
  .topnav-balance { padding:5px 10px; }

  /* Pages */
  .page-wrap  { padding:0 12px 60px; }
  .admin-wrap { padding:16px 12px 60px; }
  .comm-page  { padding:16px 12px 60px; }

  /* Hero */
  .hero { flex-direction:column; align-items:flex-start; padding:22px 18px; gap:20px; }
  .hero-title { font-size:1.45rem; }
  .hero-right { width:100%; gap:10px; }
  .hero-stat  { flex:1; min-width:0; padding:12px 10px; }
  .hero-stat-val { font-size:1.3rem; }
  .hero-stat-lbl { font-size:10px; }

  /* Courses */
  .courses-grid { grid-template-columns:1fr 1fr; gap:10px; }
  .course-card  { height:190px; }

  /* Labs */
  .labs-grid { grid-template-columns:1fr; }

  /* Admin grids */
  .two-col { grid-template-columns:1fr; }
  .stats-row { grid-template-columns:1fr 1fr; }
  .s-val { font-size:1.5rem; }

  /* Community hero */
  .comm-hero { flex-direction:column; align-items:flex-start; padding:20px 18px; gap:14px; }
  .comm-hero-title { font-size:1.4rem; }
  .posts-grid { grid-template-columns:1fr; }

  /* Profile / Support */
  .profile-shell { grid-template-columns:1fr; }
  .support-shell { grid-template-columns:1fr; }

  /* Post view */
  .post-view-article { padding:22px 18px; }
  .post-view-title   { font-size:1.4rem; }
  .comments-section  { padding:20px 18px; }
  .reply-box         { padding:20px 18px; }
  .new-post-page     { padding:0 12px; }
  .new-post-form     { padding:20px 16px; }

  /* Login: single column, hide branding */
  .auth-root { flex-direction:column; }
  .auth-left { display:none; }
  .auth-right {
    width:100%; border-left:none; min-height:100vh;
    background:transparent; padding:40px 20px 40px;
    align-items:flex-start; justify-content:flex-start;
  }
  .auth-box { width:100%; max-width:100%; }

  /* Course player */
  .course-layout { grid-template-columns:1fr; }
  .course-sidebar { height:auto; position:static; max-height:260px; overflow-y:auto; }
  .video-stage { min-height:auto; padding:14px; }

  /* App shell (admin/course) */
  .app-shell { grid-template-columns:1fr; }
  .sidebar { position:fixed; left:0; top:0; height:100%; width:240px; transform:translateX(-100%); transition:transform .25s cubic-bezier(.4,0,.2,1); z-index:150; }
  .sidebar.open { transform:translateX(0); }
  .mobile-topbar { display:flex; }
  .sidebar-toggle { display:flex; }
  .main { padding:16px 14px; }
}

/* ── Very small ≤380px ── */
@media (max-width:380px) {
  .courses-grid  { grid-template-columns:1fr; }
  .course-card   { height:200px; }
  .hero-stat-val { font-size:1.1rem; }
  .hero-stat     { padding:10px 8px; }
  .topnav-right  { gap:8px; }
  .admin-right   { gap:8px; }
  .stats-row     { grid-template-columns:1fr; }
}

/* ── Mobile-only improvements ≤640px ── */
@media (max-width:640px) {
  /* Tables: horizontal scroll with momentum on iOS */
  .table-wrap {
    overflow-x:auto;
    -webkit-overflow-scrolling:touch;
    border-radius:var(--r);
  }
  table { min-width:540px; }

  /* Labs grid: single column already set but minmax was too wide */
  .labs-grid { grid-template-columns:1fr; gap:12px; }

  /* Community: reduce new-post textarea height on phones */
  .new-post-textarea { min-height:200px; }

  /* Community post: tighten comment meta so long names don't overflow */
  .comment-meta { flex-wrap:wrap; gap:4px; }

  /* Search bar: full width when stacked */
  .sec-head { flex-wrap:wrap; gap:12px; }
  .search-bar { max-width:100%; flex:1 1 100%; }

  /* Announcements: prevent overflow on narrow screens */
  .ann-item { flex-wrap:wrap; }

  /* Modal: full width on small screens */
  #lab-pw-modal > div { width:92vw; padding:24px 18px; }

  /* Course sidebar: slightly taller on mobile so more videos visible */
  .course-sidebar { max-height:220px; }

  /* Glass-box / panel overflow for any tables inside profile */
  .glass-box, .panel { overflow-x:auto; }

  /* Logs: reduce viewer height on small phones */
  .log-viewer { min-height:45vh; }

  /* Support info cards: full width */
  .info-card { width:100%; }

  /* Tighten profile card email to prevent overflow */
  .profile-card-email { word-break:break-all; }

  /* Reduce hero stat row gap on mobile */
  .hero-right { gap:8px; }

  /* Course sidebar: bottom border instead of right border on stacked layout */
  .course-sidebar { border-right:none; border-bottom:1px solid var(--c-border); }
}

/* ── Tablet 641–900px ── */
@media (min-width:641px) and (max-width:900px) {
  /* Labs: 2 columns on tablet */
  .labs-grid { grid-template-columns:1fr 1fr; gap:14px; }

  /* Community posts: single column on tablet */
  .posts-grid { grid-template-columns:1fr; gap:14px; }

  /* Course sidebar narrower on tablet */
  .course-layout { grid-template-columns:240px 1fr; }
}

@media (min-width:1400px) {
  .courses-grid { grid-template-columns:repeat(auto-fill,minmax(280px,1fr)); }
  .course-card { height:300px; }
}

/* ══════════════════════════════════════════════════════
   LIGHT MODE
══════════════════════════════════════════════════════ */
[data-theme="light"] {
  --c-bg:       #f0f5ff;
  --c-bg1:      #ffffff;
  --c-bg2:      #e8effa;
  --c-glass:    rgba(255,255,255,.85);
  --c-glass2:   rgba(255,255,255,.95);
  --c-border:   rgba(0,0,0,.09);
  --c-border2:  rgba(0,0,0,.16);
  --c-txt:      #0f172a;
  --c-txt2:     #334155;
  --c-txt3:     #64748b;
  --c-blue:     #2563eb;
  --c-blue2:    #1d4ed8;
  --c-blue-glow:rgba(37,99,235,.2);
  --c-purple:   #7c3aed;
  --c-cyan:     #0284c7;
  --c-green:    #059669;
  --c-red:      #dc2626;
  --c-yellow:   #d97706;
  --shadow-sm:  0 2px 8px rgba(0,0,0,.08);
  --shadow:     0 4px 16px rgba(0,0,0,.1);
  --shadow-lg:  0 8px 32px rgba(0,0,0,.12);
  --shadow-xl:  0 16px 48px rgba(0,0,0,.15);
}
[data-theme="light"] body {
  background-image:
    radial-gradient(ellipse 70% 50% at 10% 0%, rgba(37,99,235,.06) 0%, transparent 60%),
    radial-gradient(ellipse 50% 60% at 90% 100%, rgba(124,58,237,.04) 0%, transparent 60%);
}
[data-theme="light"] .topnav { background:rgba(240,245,255,.9); border-bottom-color:rgba(0,0,0,.08); }
[data-theme="light"] .topnav-logo-dot { box-shadow:0 0 10px #2563eb,0 0 20px rgba(37,99,235,.4); }
[data-theme="light"] .topnav-tab { color:#475569; }
[data-theme="light"] .topnav-tab:hover { background:rgba(0,0,0,.05); color:#0f172a; }
[data-theme="light"] .topnav-tab.active { background:rgba(37,99,235,.1); color:#2563eb; }
[data-theme="light"] .topnav-balance { background:rgba(37,99,235,.08); border-color:rgba(37,99,235,.2); color:#2563eb; }
[data-theme="light"] .topnav-avatar { box-shadow:0 0 12px rgba(37,99,235,.25); }
[data-theme="light"] .hero { box-shadow:0 8px 40px rgba(37,99,235,.2); }
[data-theme="light"] .course-card { border-color:rgba(0,0,0,.1); }
[data-theme="light"] .stat-icon.blue   { box-shadow:0 0 16px rgba(37,99,235,.1); }
[data-theme="light"] .stat-icon.green  { box-shadow:0 0 16px rgba(5,150,105,.1); }
[data-theme="light"] .stat-icon.purple { box-shadow:0 0 16px rgba(124,58,237,.1); }
[data-theme="light"] .stat-icon.orange { box-shadow:0 0 16px rgba(234,88,12,.1); }
[data-theme="light"] code { background:rgba(0,0,0,.06); color:#2563eb; }
[data-theme="light"] thead th { background:rgba(0,0,0,.03); }
[data-theme="light"] tbody tr:hover { background:rgba(37,99,235,.04); }
[data-theme="light"] .chat-bubble-user .chat-bubble-msg { background:rgba(0,0,0,.04); border-color:rgba(0,0,0,.09); color:#0f172a; }
[data-theme="light"] .reply-textarea { background:rgba(0,0,0,.03); }
[data-theme="light"] .reply-textarea:focus { background:rgba(37,99,235,.04); }
[data-theme="light"] .ann-item { background:rgba(37,99,235,.06); border-color:rgba(37,99,235,.15); }
[data-theme="light"] .badge.neutral { background:rgba(0,0,0,.05); color:#475569; border-color:rgba(0,0,0,.1); }
[data-theme="light"] .sidebar { background:linear-gradient(180deg,#1e3a5f,#0f2340); }
[data-theme="light"] .admin-topnav { background:rgba(240,245,255,.9); border-bottom-color:rgba(0,0,0,.08); }

/* Theme toggle button */
.theme-toggle {
  width:36px; height:36px; border-radius:50%; border:1px solid var(--c-border2);
  background:var(--c-glass); color:var(--c-txt2); cursor:pointer;
  display:flex; align-items:center; justify-content:center;
  transition:all var(--t); backdrop-filter:var(--blur);
  flex-shrink:0;
}
.theme-toggle:hover { background:var(--c-glass2); color:var(--c-txt); border-color:var(--c-blue); }

/* ══════════════════════════════════════════════════════
   LIGHT MODE — EXTENDED OVERRIDES
══════════════════════════════════════════════════════ */
[data-theme="light"] body::before {
  background:
    radial-gradient(ellipse 80% 60% at 0% 0%, rgba(37,99,235,.05) 0%, transparent 55%),
    radial-gradient(ellipse 60% 70% at 100% 100%, rgba(124,58,237,.03) 0%, transparent 55%);
}

/* Announcements — hardcoded dark-blue text → readable on light */
[data-theme="light"] .ann-item { background:rgba(37,99,235,.07); border-color:rgba(37,99,235,.18); }
[data-theme="light"] .ann-text strong { color:#1d4ed8; }
[data-theme="light"] .ann-text span   { color:#334155; }
[data-theme="light"] .ann-close       { color:rgba(29,78,216,.4); }
[data-theme="light"] .ann-close:hover { color:#1d4ed8; }
[data-theme="light"] .ann-pulse       { background:var(--c-blue); box-shadow:0 0 10px rgba(37,99,235,.4); }

/* Chat support bubble */
[data-theme="light"] .chat-bubble-support .chat-bubble-msg { background:rgba(37,99,235,.1); border-color:rgba(37,99,235,.25); color:#1e3a8a; }
[data-theme="light"] .chat-bubble-support .chat-bubble-sender { color:#2563eb; }
[data-theme="light"] .chat-bubble-user .chat-bubble-msg { background:rgba(0,0,0,.05); border-color:rgba(0,0,0,.1); }

/* Chat input */
[data-theme="light"] .chat-input textarea { background:rgba(0,0,0,.04); border-color:rgba(0,0,0,.12); color:#0f172a; }
[data-theme="light"] .chat-input textarea::placeholder { color:#94a3b8; }
[data-theme="light"] .chat-input textarea:focus { background:rgba(37,99,235,.05); border-color:rgba(37,99,235,.4); }

/* Select option dropdown backgrounds */
[data-theme="light"] .field select option { background:#ffffff; color:#0f172a; }

/* Community sub-tabs */
[data-theme="light"] .comm-sub-tabs { background:rgba(240,245,255,.9); }
[data-theme="light"] .comm-sub-tab  { color:#64748b; }
[data-theme="light"] .comm-sub-tab:hover { color:#0f172a; }
[data-theme="light"] .comm-sub-tab.active { color:#2563eb; border-bottom-color:#2563eb; }
[data-theme="light"] .comm-topnav-extra { background:rgba(240,245,255,.9); border-bottom-color:rgba(0,0,0,.08); }

/* Course sidebar */
[data-theme="light"] .course-sidebar { background:#f1f5fb; border-right-color:rgba(0,0,0,.1); }
[data-theme="light"] .cs-header      { background:#f1f5fb; border-bottom-color:rgba(0,0,0,.1); }
[data-theme="light"] .cs-video-item:hover { background:rgba(37,99,235,.06); }
[data-theme="light"] .cs-video-item.active { background:rgba(37,99,235,.1); border-left-color:#2563eb; }
[data-theme="light"] .cs-video-item.active .cs-video-link,
[data-theme="light"] .cs-video-item.completed.active .cs-video-link { color:#1d4ed8; }
[data-theme="light"] .cs-video-item.active .cs-video-num { background:#2563eb; }
[data-theme="light"] .cs-check-btn { border-color:rgba(0,0,0,.15); background:rgba(0,0,0,.03); }
[data-theme="light"] .cs-check-btn:hover { border-color:#2563eb; color:#2563eb; background:rgba(37,99,235,.08); }
[data-theme="light"] .video-stage { background:#f0f5ff; }

/* Reply textarea */
[data-theme="light"] .reply-textarea { background:rgba(0,0,0,.03); color:#0f172a; border-color:rgba(0,0,0,.12); }
[data-theme="light"] .reply-textarea:focus { background:rgba(37,99,235,.04); border-color:rgba(37,99,235,.4); }

/* Search bar */
[data-theme="light"] .search-bar { background:rgba(255,255,255,.9); border-color:rgba(0,0,0,.12); }
[data-theme="light"] .search-bar:focus-within { border-color:#2563eb; box-shadow:0 0 0 3px rgba(37,99,235,.1); }

/* Form fields */
[data-theme="light"] .field input,
[data-theme="light"] .field textarea,
[data-theme="light"] .field select { background:rgba(255,255,255,.9); border-color:rgba(0,0,0,.14); color:#0f172a; }
[data-theme="light"] .field input::placeholder,
[data-theme="light"] .field textarea::placeholder { color:#94a3b8; }
[data-theme="light"] .field input:focus,
[data-theme="light"] .field textarea:focus,
[data-theme="light"] .field select:focus { background:#fff; border-color:#2563eb; box-shadow:0 0 0 3px rgba(37,99,235,.12); }

/* Enrolled course link color */
[data-theme="light"] tbody td a { color:#2563eb; }

/* Post card */
[data-theme="light"] .post-card:hover { border-color:rgba(37,99,235,.3); box-shadow:var(--shadow),0 0 30px rgba(37,99,235,.08); }
[data-theme="light"] .post-card-read  { color:#2563eb; }
[data-theme="light"] .post-card-read:hover { color:#1d4ed8; }

/* Scrollbar in light mode */
[data-theme="light"] * { scrollbar-color:rgba(0,0,0,.15) transparent; }
[data-theme="light"] ::-webkit-scrollbar-thumb { background:rgba(0,0,0,.15); }