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

/* ══════════════════════════════════════
   THE DON ACADEMY — Design System
   Colors sourced from bot.donhamad.com
   ══════════════════════════════════════ */
:root {
  /* Brand colors — exact from bot.donhamad.com */
  --red:       #B80000;
  --red-hover: #D50000;
  --red-dim:   #7B0000;
  --red-glow:  rgba(184,0,0,.35);
  --red-soft:  rgba(184,0,0,.12);
  --red-mid:   rgba(184,0,0,.22);
  --red-text:  rgba(184,0,0,.85);

  /* Backgrounds */
  --bg:        #070505;
  --surface:   #0E0909;
  --surface-2: #130C0C;
  --surface-3: #1A1010;
  --surface-4: #211414;

  /* Text */
  --white:     #EDE8E8;
  --white-dim: rgba(237,232,232,.72);
  --white-low: rgba(237,232,232,.45);
  --muted:     #5A4A4A;
  --muted-hi:  #7A6060;

  /* Borders */
  --border:    rgba(184,0,0,.12);
  --border-hi: rgba(184,0,0,.28);
  --border-lo: rgba(237,232,232,.06);

  /* Semantic */
  --green:  #1DB954;
  --blue:   #4A9EFF;
  --warn:   #E8A020;

  /* Misc */
  --radius:    12px;
  --radius-sm: 8px;
  --radius-xs: 4px;
  --shadow:    0 8px 40px rgba(0,0,0,.7);
  --shadow-r:  0 0 48px rgba(184,0,0,.12);
  --t:         all .2s cubic-bezier(.4,0,.2,1);
  --font:      'Cairo', sans-serif;
}

/* ── RESET ── */
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{
  font-family:var(--font);
  background:var(--bg);
  color:var(--white);
  direction:rtl;
  line-height:1.65;
  min-height:100vh;
  overflow-x:hidden;
}
::-webkit-scrollbar{width:4px}
::-webkit-scrollbar-track{background:var(--surface)}
::-webkit-scrollbar-thumb{background:var(--red-dim);border-radius:4px}
a{text-decoration:none;color:inherit;transition:var(--t)}
img{display:block;max-width:100%}
svg{display:block;flex-shrink:0}

/* ── GRAIN TEXTURE (from bot.donhamad.com) ── */
body::after{
  content:'';position:fixed;inset:0;
  background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='300' height='300'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.75' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='300' height='300' filter='url(%23n)' opacity='0.035'/%3E%3C/svg%3E");
  pointer-events:none;z-index:9998;
}

/* ── NAVBAR ── */
.navbar{
  position:sticky;top:0;z-index:900;height:58px;
  background:rgba(7,5,5,.94);
  backdrop-filter:blur(24px);-webkit-backdrop-filter:blur(24px);
  border-bottom:1px solid var(--border);
}
.navbar-inner{
  max-width:1360px;margin:0 auto;padding:0 24px;
  height:100%;display:flex;align-items:center;gap:16px;
}
.nav-logo{font-size:1.05rem;font-weight:900;letter-spacing:3px;background:linear-gradient(135deg,#FF4444,#B80000);-webkit-background-clip:text;-webkit-text-fill-color:transparent;flex-shrink:0}
.nav-logo span{color:var(--red);-webkit-text-fill-color:var(--red)}
.nav-links{display:flex;gap:2px}
.nav-links a{
  padding:5px 13px;border-radius:var(--radius-xs);
  font-size:.76rem;font-weight:600;color:var(--muted-hi);transition:var(--t);
  letter-spacing:.3px;
}
.nav-links a:hover,.nav-links a.active{color:var(--white);background:rgba(237,232,232,.05)}
.nav-right{margin-right:auto;display:flex;align-items:center;gap:8px}
.nav-icon-btn{
  width:33px;height:33px;border-radius:var(--radius-xs);
  background:var(--surface);border:1px solid var(--border);
  color:var(--muted-hi);display:flex;align-items:center;justify-content:center;
  cursor:pointer;transition:var(--t);position:relative;
}
.nav-icon-btn:hover{border-color:var(--border-hi);color:var(--white)}
.badge-dot{
  position:absolute;top:4px;right:4px;
  width:6px;height:6px;background:var(--red);
  border-radius:50%;border:1.5px solid var(--bg);
}
.nav-avatar{
  width:31px;height:31px;border-radius:var(--radius-xs);
  border:1px solid var(--border-hi);object-fit:cover;cursor:pointer;transition:var(--t);
}
.nav-avatar:hover{border-color:var(--red)}

/* ── LAYOUT ── */
.app-layout{display:flex;min-height:calc(100vh - 58px)}

.sidebar-left{
  width:214px;flex-shrink:0;
  background:var(--surface);border-left:1px solid var(--border);
  padding:12px 8px;position:sticky;top:58px;
  height:calc(100vh - 58px);overflow-y:auto;
  display:flex;flex-direction:column;gap:2px;
}
.sidebar-group-label{
  font-size:.58rem;font-weight:800;letter-spacing:2px;
  color:rgba(184,0,0,.5);text-transform:uppercase;
  padding:10px 10px 4px;margin-top:6px;
}
.sidebar-item{
  display:flex;align-items:center;gap:9px;
  padding:8px 10px;border-radius:var(--radius-xs);
  font-size:.78rem;font-weight:500;color:var(--muted-hi);
  transition:var(--t);cursor:pointer;text-decoration:none;
}
.sidebar-item:hover{color:var(--white);background:rgba(237,232,232,.04)}
.sidebar-item.active{
  color:var(--white);
  background:rgba(184,0,0,.1);
  font-weight:700;
  border-right:2px solid var(--red);
}
.sidebar-item .si-icon{width:16px;height:16px;display:flex;align-items:center;justify-content:center;flex-shrink:0}
.sidebar-item .si-badge{margin-right:auto;background:var(--red);color:var(--white);font-size:.6rem;font-weight:800;padding:1px 7px;border-radius:2px}
.sidebar-bottom{margin-top:auto;padding-top:8px;border-top:1px solid var(--border)}

.main-area{flex:1;min-width:0;padding:28px 32px}
.sidebar-right{width:280px;flex-shrink:0;padding:18px 14px;border-right:1px solid var(--border)}

/* ── BUTTONS ── */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:7px;
  padding:9px 20px;border-radius:var(--radius-xs);
  font-family:var(--font);font-size:.8rem;font-weight:800;
  cursor:pointer;border:none;transition:var(--t);
  white-space:nowrap;text-decoration:none;line-height:1;
  letter-spacing:.3px;
}
.btn:disabled{opacity:.4;cursor:not-allowed;pointer-events:none}
.btn-gold,.btn-red{background:var(--red);color:var(--white)}
.btn-gold:hover,.btn-red:hover{background:var(--red-hover);transform:translateY(-1px);color:var(--white)}
.btn-outline{background:transparent;color:rgba(237,232,232,.55);border:1px solid rgba(255,255,255,.1)}
.btn-outline:hover{border-color:rgba(255,255,255,.25);color:var(--white)}
.btn-ghost{background:rgba(237,232,232,.04);color:var(--muted-hi);border:1px solid var(--border)}
.btn-ghost:hover{background:rgba(237,232,232,.07);color:var(--white)}
.btn-danger{background:rgba(184,0,0,.15);color:#F87171;border:1px solid rgba(184,0,0,.25)}
.btn-danger:hover{background:rgba(184,0,0,.25)}
.btn-follow{background:var(--white);color:var(--bg);font-weight:800;font-size:.74rem;padding:5px 14px;border-radius:2px;border:none}
.btn-follow:hover{background:rgba(237,232,232,.85)}
.btn-following{background:transparent;color:var(--white-dim);border:1px solid var(--border-lo);font-size:.74rem;padding:5px 14px;border-radius:2px}
.btn-following:hover{color:#F87171;border-color:rgba(248,113,113,.4);background:rgba(248,113,113,.06)}
.btn-sm{padding:6px 14px;font-size:.74rem}
.btn-lg{padding:13px 30px;font-size:.9rem}
.btn-block{width:100%}

/* ── CARDS ── */
.card{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius-sm);transition:var(--t)}
.card:hover{border-color:var(--border-hi);box-shadow:var(--shadow-r)}
.card-body{padding:20px 22px}
.card-header{padding:14px 20px;border-bottom:1px solid var(--border);display:flex;align-items:center;justify-content:space-between}
.card-header h3{font-size:.88rem;font-weight:700;color:var(--white);margin:0}

/* ── STAT CARDS ── */
.stats-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(160px,1fr));gap:1px;background:var(--border)}
.stat-card{
  background:var(--surface);padding:24px 20px;
  transition:var(--t);cursor:default;
}
.stat-card:hover{background:var(--surface-2)}
.stat-card-top{display:flex;align-items:center;justify-content:space-between;margin-bottom:14px}
.stat-icon{
  width:34px;height:34px;border-radius:var(--radius-xs);
  background:var(--red-soft);border:1px solid var(--border-hi);
  display:flex;align-items:center;justify-content:center;color:var(--red);
}
.stat-badge{font-size:.62rem;font-weight:700;padding:2px 7px;border-radius:2px}
.badge-up{background:rgba(29,185,84,.12);color:var(--green);border:1px solid rgba(29,185,84,.2)}
.badge-new{background:rgba(74,158,255,.12);color:var(--blue);border:1px solid rgba(74,158,255,.2)}
.stat-val{font-size:1.8rem;font-weight:900;color:var(--white);letter-spacing:-.5px;line-height:1}
.stat-lbl{font-size:.68rem;color:var(--muted);margin-top:5px;font-weight:600;letter-spacing:.5px;text-transform:uppercase}
.mini-bars{display:flex;align-items:flex-end;gap:3px;height:24px;margin-top:12px}
.mb{flex:1;border-radius:1px;background:rgba(184,0,0,.15);transition:.3s}
.mb.hi{background:rgba(184,0,0,.55)}

/* ── COURSE CARDS ── */
.course-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(260px,1fr));gap:1px;background:var(--border)}
.course-card{
  background:var(--surface);overflow:hidden;transition:var(--t);
  display:flex;flex-direction:column;cursor:pointer;text-decoration:none;
}
.course-card:hover{background:var(--surface-2)}
.course-thumb{height:110px;position:relative;overflow:hidden;display:flex;align-items:center;justify-content:center;background:var(--bg)}
.course-thumb-badge{position:absolute;top:10px;right:10px;font-size:.6rem;font-weight:800;padding:3px 8px;border-radius:2px;background:var(--red);color:var(--white);letter-spacing:.5px}
.course-progress-wrap{position:absolute;bottom:0;left:0;right:0;height:1px;background:var(--border)}
.course-progress-fill{height:100%;background:var(--red)}
.course-body{padding:16px;flex:1;display:flex;flex-direction:column;gap:9px}
.course-title{font-size:.85rem;font-weight:700;color:var(--white);line-height:1.4}
.course-meta{display:flex;gap:14px}
.course-meta-item{display:flex;align-items:center;gap:4px;font-size:.69rem;color:var(--muted-hi)}
.course-footer{padding:12px 16px;border-top:1px solid var(--border);display:flex;align-items:center;justify-content:space-between}
.course-price{font-size:1rem;font-weight:900;color:var(--white)}
.course-price.free{color:var(--green)}

/* ── FEED TABS ── */
.feed-tabs{
  position:sticky;top:58px;z-index:50;
  background:rgba(7,5,5,.96);backdrop-filter:blur(20px);
  border-bottom:1px solid var(--border);display:flex;
}
.feed-tab{
  flex:1;text-align:center;padding:15px 6px;
  font-size:.76rem;font-weight:700;color:var(--muted-hi);
  border-bottom:2px solid transparent;cursor:pointer;transition:var(--t);
  user-select:none;letter-spacing:.3px;
}
.feed-tab:hover{color:var(--white);background:rgba(237,232,232,.02)}
.feed-tab.active{color:var(--white);border-bottom-color:var(--red)}

/* ── COMPOSE ── */
.feed-compose{background:var(--surface);border-bottom:1px solid var(--border);padding:16px 20px}
.feed-compose-inner{display:flex;gap:12px}
.compose-textarea{
  width:100%;background:transparent;border:none;outline:none;
  color:var(--white);font-family:var(--font);font-size:.92rem;
  resize:none;min-height:54px;line-height:1.65;padding-top:2px;
}
.compose-textarea::placeholder{color:var(--muted)}
.compose-toolbar{display:flex;align-items:center;gap:6px;padding-top:10px;border-top:1px solid var(--border);margin-top:8px}
.compose-type-btn{
  padding:4px 12px;border-radius:2px;
  background:var(--surface-2);border:1px solid var(--border);
  color:var(--muted-hi);font-family:var(--font);font-size:.71rem;font-weight:700;
  cursor:pointer;transition:var(--t);letter-spacing:.3px;
}
.compose-type-btn:hover,.compose-type-btn.active{border-color:var(--border-hi);color:var(--red-text);background:var(--red-soft)}
.compose-char{margin-right:auto;font-size:.7rem;color:var(--muted);font-family:monospace}
.compose-char.warn{color:#F87171}
.post-submit-btn{
  background:var(--red);color:var(--white);border:none;
  border-radius:2px;padding:7px 20px;
  font-family:var(--font);font-size:.78rem;font-weight:800;
  cursor:pointer;transition:var(--t);letter-spacing:.3px;
}
.post-submit-btn:hover{background:var(--red-hover)}
.post-submit-btn:disabled{opacity:.5;cursor:not-allowed}

/* ── FEED POSTS ── */
.feed-post{
  background:var(--bg);border-bottom:1px solid var(--border);
  padding:16px 20px;transition:.12s;cursor:pointer;
}
.feed-post:hover{background:var(--surface)}
.post-row{display:flex;gap:12px}
.post-avatar-col{flex-shrink:0;position:relative}
.post-av-img{
  width:40px;height:40px;border-radius:var(--radius-xs);
  object-fit:cover;border:1px solid var(--border);
  display:flex;align-items:center;justify-content:center;
  font-size:.8rem;font-weight:800;color:var(--white);overflow:hidden;
}
.post-verified-dot{
  position:absolute;bottom:-2px;right:-2px;
  width:13px;height:13px;background:var(--red);
  border-radius:2px;border:2px solid var(--bg);
  display:flex;align-items:center;justify-content:center;
}
.post-col{flex:1;min-width:0}
.post-header-row{display:flex;align-items:center;gap:6px;margin-bottom:5px;flex-wrap:wrap}
.post-author-name{font-size:.87rem;font-weight:800;color:var(--white);cursor:pointer;letter-spacing:.2px}
.post-author-name:hover{color:var(--red-text)}
.post-author-handle{font-size:.73rem;color:var(--muted)}
.post-sep{width:2px;height:2px;border-radius:50%;background:var(--muted);flex-shrink:0}
.post-time{font-size:.69rem;color:var(--muted);margin-right:auto;font-family:monospace}
.post-type-badge{font-size:.61rem;font-weight:700;padding:2px 8px;border-radius:2px;letter-spacing:.5px}
.post-type-question{background:rgba(74,158,255,.1);color:var(--blue);border:1px solid rgba(74,158,255,.2)}
.post-type-achievement{background:var(--red-soft);color:var(--red-text);border:1px solid var(--border-hi)}
.post-solved-badge{background:rgba(29,185,84,.1);color:var(--green);border:1px solid rgba(29,185,84,.2);font-size:.61rem;font-weight:700;padding:2px 8px;border-radius:2px}
.post-body{font-size:.88rem;color:var(--white-dim);line-height:1.72;white-space:pre-wrap;word-break:break-word;margin-bottom:10px}
.post-body .hashtag{color:var(--red-text);font-weight:700;cursor:pointer}
.post-body .hashtag:hover{color:var(--red)}
.post-body .mention{color:var(--blue);font-weight:600;cursor:pointer}
.post-media{margin-bottom:10px;border-radius:var(--radius-xs);overflow:hidden;border:1px solid var(--border)}
.post-media img{width:100%;max-height:340px;object-fit:cover}
.post-actions{display:flex;gap:0;margin-top:2px}
.post-action-btn{
  display:flex;align-items:center;gap:5px;
  padding:6px 10px 6px 8px;border-radius:2px;border:none;
  background:none;color:var(--muted);font-family:var(--font);
  font-size:.73rem;cursor:pointer;transition:var(--t);min-width:50px;
}
.post-action-btn svg{transition:transform .18s}
.post-action-btn:hover svg{transform:scale(1.15)}
.post-action-btn.reply:hover{color:var(--blue);background:rgba(74,158,255,.06)}
.post-action-btn.repost:hover{color:var(--green);background:rgba(29,185,84,.06)}
.post-action-btn.like:hover{color:#F87171;background:rgba(248,113,113,.06)}
.post-action-btn.save:hover{color:var(--red-text);background:var(--red-soft)}
.post-action-btn.liked{color:#F87171}
.post-action-btn.reposted{color:var(--green)}
.post-action-btn.saved{color:var(--red-text)}

/* ── RIGHT SIDEBAR ── */
.r-widget{background:var(--surface);border:1px solid var(--border);margin-bottom:1px}
.r-widget-hd{padding:12px 16px;border-bottom:1px solid var(--border);font-size:.76rem;font-weight:800;color:var(--white);letter-spacing:2px;text-transform:uppercase}
.trend-row{display:flex;align-items:center;gap:10px;padding:10px 16px;cursor:pointer;transition:var(--t);text-decoration:none;border-bottom:1px solid var(--border)}
.trend-row:last-child{border-bottom:none}
.trend-row:hover{background:var(--surface-2)}
.trend-rank{font-size:.62rem;color:var(--muted);min-width:14px;text-align:center;font-weight:700;font-family:monospace}
.trend-rank.hot{color:var(--red)}
.trend-info{flex:1;min-width:0}
.trend-tag{font-size:.84rem;font-weight:800;color:var(--white)}
.trend-count{font-size:.64rem;color:var(--muted);margin-top:2px;font-family:monospace}
.trend-spark{display:flex;align-items:flex-end;gap:2px;height:16px;flex-shrink:0}
.sp{width:3px;border-radius:1px 1px 0 0;background:rgba(184,0,0,.2)}
.sp.hi{background:rgba(184,0,0,.6)}
.sug-user-row{display:flex;align-items:center;gap:10px;padding:10px 16px;border-bottom:1px solid var(--border)}
.sug-user-row:last-child{border-bottom:none}
.sug-av{width:34px;height:34px;border-radius:var(--radius-xs);object-fit:cover;border:1px solid var(--border);display:flex;align-items:center;justify-content:center;font-size:.72rem;font-weight:800;color:var(--white);flex-shrink:0}
.sug-info{flex:1;min-width:0}
.sug-name{font-size:.79rem;font-weight:700;color:var(--white);overflow:hidden;text-overflow:ellipsis;white-space:nowrap;text-decoration:none;display:block}
.sug-name:hover{color:var(--red-text)}
.sug-fol-count{font-size:.65rem;color:var(--muted);margin-top:2px}

/* ── FORMS ── */
.form-group{margin-bottom:18px}
.form-label{display:block;font-size:.74rem;font-weight:700;color:var(--white-low);margin-bottom:7px;letter-spacing:.5px;text-transform:uppercase}
.form-control{
  width:100%;padding:11px 14px;
  background:var(--surface-2);border:1px solid var(--border);
  color:var(--white);border-radius:var(--radius-xs);
  font-family:var(--font);font-size:.88rem;transition:var(--t);outline:none;
}
.form-control:focus{border-color:var(--border-hi);background:var(--surface-3);box-shadow:0 0 0 3px rgba(184,0,0,.08)}
.form-control::placeholder{color:var(--muted)}
textarea.form-control{resize:vertical;min-height:90px}
select.form-control{cursor:pointer}
select.form-control option{background:var(--surface-2)}
.form-hint{font-size:.7rem;color:var(--muted);margin-top:5px}
.form-error{font-size:.7rem;color:#F87171;margin-top:5px}

/* ── ALERTS ── */
.alert{padding:12px 16px;border-radius:var(--radius-xs);font-size:.82rem;margin-bottom:14px;border:1px solid;display:flex;align-items:flex-start;gap:8px}
.alert-success{background:rgba(29,185,84,.07);border-color:rgba(29,185,84,.2);color:var(--green)}
.alert-error{background:rgba(248,113,113,.07);border-color:rgba(248,113,113,.2);color:#F87171}
.alert-info{background:rgba(74,158,255,.07);border-color:rgba(74,158,255,.2);color:var(--blue)}
.alert-gold{background:var(--red-soft);border-color:var(--border-hi);color:var(--red-text)}

/* ── CHIPS ── */
.chip{display:inline-flex;align-items:center;gap:4px;padding:3px 9px;border-radius:2px;font-size:.65rem;font-weight:700;letter-spacing:.5px;text-transform:uppercase}
.chip-gold,.chip-red{background:var(--red-soft);color:var(--red-text);border:1px solid var(--border-hi)}
.chip-green{background:rgba(29,185,84,.1);color:var(--green);border:1px solid rgba(29,185,84,.2)}
.chip-red-danger{background:rgba(248,113,113,.1);color:#F87171;border:1px solid rgba(248,113,113,.2)}
.chip-gray{background:rgba(237,232,232,.04);color:var(--muted-hi);border:1px solid var(--border-lo)}
.chip-blue{background:rgba(74,158,255,.1);color:var(--blue);border:1px solid rgba(74,158,255,.2)}

/* ── TABLE ── */
.table-wrap{overflow-x:auto;border:1px solid var(--border)}
table{width:100%;border-collapse:collapse}
thead th{padding:11px 16px;font-size:.62rem;font-weight:800;color:var(--muted);letter-spacing:1.5px;text-transform:uppercase;background:var(--surface);border-bottom:1px solid var(--border);text-align:right}
tbody td{padding:13px 16px;font-size:.85rem;color:var(--white-dim);border-bottom:1px solid var(--border);vertical-align:middle}
tbody tr:last-child td{border-bottom:none}
tbody tr:hover td{background:var(--surface)}

/* ── MODAL ── */
.modal-overlay{position:fixed;inset:0;z-index:2000;background:rgba(0,0,0,.85);backdrop-filter:blur(12px);display:flex;align-items:center;justify-content:center;padding:20px;opacity:0;pointer-events:none;transition:opacity .2s}
.modal-overlay.open{opacity:1;pointer-events:all}
.modal{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius-xs);width:100%;max-width:520px;max-height:90vh;overflow-y:auto;transform:scale(.96);transition:transform .2s;box-shadow:0 32px 80px rgba(0,0,0,.8)}
.modal-overlay.open .modal{transform:scale(1)}
.modal-lg{max-width:720px}
.modal-header{padding:16px 20px;border-bottom:1px solid var(--border);display:flex;align-items:center;justify-content:space-between}
.modal-header h3{color:var(--white);font-size:.92rem;font-weight:700;letter-spacing:.3px}
.modal-close{background:none;border:none;color:var(--muted);cursor:pointer;font-size:1.1rem;padding:4px;transition:var(--t);line-height:1}
.modal-close:hover{color:var(--white)}
.modal-body{padding:20px}
.modal-footer{padding:14px 20px;border-top:1px solid var(--border);display:flex;gap:8px;justify-content:flex-end}

/* ── TOAST ── */
#toasts{position:fixed;bottom:24px;left:24px;z-index:9999;display:flex;flex-direction:column;gap:8px}
.toast{background:var(--surface-2);border:1px solid var(--border);padding:12px 16px;display:flex;align-items:center;gap:10px;min-width:250px;max-width:340px;animation:toastIn .25s ease;box-shadow:var(--shadow);font-size:.84rem}
.toast.success{border-color:rgba(29,185,84,.3)}
.toast.error{border-color:rgba(248,113,113,.3)}
.toast.info{border-color:var(--border-hi)}
.toast-msg{color:var(--white-dim);flex:1}
@keyframes toastIn{from{opacity:0;transform:translateY(12px)}to{opacity:1;transform:translateY(0)}}

/* ── LESSON PLAYER ── */
.player-layout{display:grid;grid-template-columns:1fr 300px;gap:0;min-height:calc(100vh - 58px)}
.player-main{padding:24px;display:flex;flex-direction:column;gap:20px;border-left:1px solid var(--border)}
.player-sidebar{background:var(--surface);overflow-y:auto;height:calc(100vh - 58px);position:sticky;top:58px}
.video-box{position:relative;aspect-ratio:16/9;background:#000;overflow:hidden}
.video-box iframe{width:100%;height:100%;border:none}
.lesson-list-header{padding:14px 18px;border-bottom:1px solid var(--border);font-size:.76rem;font-weight:800;color:var(--white);letter-spacing:1px;text-transform:uppercase}
.section-title-bar{padding:8px 18px 6px;font-size:.62rem;font-weight:800;color:rgba(184,0,0,.6);letter-spacing:1.5px;text-transform:uppercase;background:var(--bg);border-bottom:1px solid var(--border)}
.lesson-row{display:flex;align-items:center;gap:10px;padding:12px 18px;cursor:pointer;transition:var(--t);border-bottom:1px solid var(--border);text-decoration:none}
.lesson-row:hover{background:var(--surface-2)}
.lesson-row.active{background:var(--red-soft);border-right:2px solid var(--red)}
.lesson-row.locked{opacity:.4;cursor:not-allowed}
.lesson-num{width:24px;height:24px;border-radius:2px;border:1px solid var(--border);display:flex;align-items:center;justify-content:center;font-size:.7rem;font-weight:800;color:var(--muted);flex-shrink:0;font-family:monospace}
.lesson-row.completed .lesson-num{background:var(--green);border-color:var(--green);color:var(--bg)}
.lesson-row-title{flex:1;font-size:.82rem;color:var(--white-dim);line-height:1.3}
.lesson-row-dur{font-size:.68rem;color:var(--muted);white-space:nowrap;font-family:monospace}

/* ── ADMIN ── */
.admin-header{display:flex;align-items:center;justify-content:space-between;margin-bottom:28px;flex-wrap:wrap;gap:14px}
.admin-header h2{font-size:1.1rem;font-weight:800;color:var(--white);margin:0;letter-spacing:-.2px}
.search-bar{display:flex;align-items:center;background:var(--surface-2);border:1px solid var(--border);overflow:hidden;width:260px}
.search-bar input{flex:1;background:none;border:none;color:var(--white);padding:9px 14px;font-family:var(--font);font-size:.84rem;outline:none}
.search-bar input::placeholder{color:var(--muted)}
.search-bar button{background:none;border:none;color:var(--muted);padding:9px 12px;cursor:pointer;font-size:.9rem;transition:var(--t)}
.search-bar button:hover{color:var(--white)}

/* ── PAGE HEADER ── */
.page-header{margin-bottom:28px}
.page-header h1{font-size:1.3rem;font-weight:900;color:var(--white);letter-spacing:-.3px;margin-bottom:4px}
.page-header p{font-size:.78rem;color:var(--muted)}

/* ── DIVIDER ── */
.divider{height:1px;background:linear-gradient(90deg,transparent,var(--border),transparent);margin:24px 0}

/* ── MISC UTILS ── */
.text-red{color:var(--red-text)} .text-muted{color:var(--muted)} .text-white{color:var(--white)}
.text-green{color:var(--green)} .text-danger{color:#F87171} .text-blue{color:var(--blue)}
.font-mono{font-family:monospace}
.mt-1{margin-top:6px}.mt-2{margin-top:12px}.mt-3{margin-top:20px}.mt-4{margin-top:28px}
.mb-1{margin-bottom:6px}.mb-2{margin-bottom:12px}.mb-3{margin-bottom:20px}
.flex{display:flex}.items-center{align-items:center}.justify-between{justify-content:space-between}.gap-1{gap:6px}.gap-2{gap:12px}.gap-3{gap:20px}
.grid-2{display:grid;grid-template-columns:1fr 1fr;gap:16px}
.grid-3{display:grid;grid-template-columns:1fr 1fr 1fr;gap:14px}
.avatar-sm{width:32px;height:32px;border-radius:var(--radius-xs);object-fit:cover;border:1px solid var(--border);display:flex;align-items:center;justify-content:center;font-size:.72rem;font-weight:800;color:var(--white);overflow:hidden}
.avatar-md{width:40px;height:40px;border-radius:var(--radius-xs);object-fit:cover;border:1px solid var(--border);display:flex;align-items:center;justify-content:center;font-size:.8rem;font-weight:800;color:var(--white);overflow:hidden}
.spinner{display:inline-block;width:16px;height:16px;border:2px solid var(--border);border-top-color:var(--red);border-radius:50%;animation:spin .6s linear infinite}
@keyframes spin{to{transform:rotate(360deg)}}
.empty-state{text-align:center;padding:60px 20px;color:var(--muted)}
.empty-state-icon{margin:0 auto 14px;opacity:.3}
.empty-state p{font-size:.88rem}
.skel{background:linear-gradient(90deg,var(--surface) 25%,var(--surface-2) 50%,var(--surface) 75%);background-size:200% 100%;animation:skel 1.4s ease infinite;border-radius:2px}
@keyframes skel{0%{background-position:200% 0}100%{background-position:-200% 0}}

/* ── QUIZ ── */
.quiz-overlay{background:var(--surface);border:1px solid var(--border);overflow:hidden}
.quiz-header{background:var(--surface-2);padding:20px 24px;border-bottom:1px solid var(--border);display:flex;align-items:center;gap:14px}
.quiz-header h3{color:var(--white);margin-bottom:4px;font-size:1rem}
.quiz-header p{font-size:.8rem;color:var(--muted);margin:0}
.quiz-body{padding:24px}
.quiz-progress-bar{height:2px;background:var(--border);margin-bottom:24px}
.quiz-progress-fill{height:100%;background:var(--red);transition:width .4s ease}
.quiz-question-num{font-size:.62rem;color:var(--red);font-weight:800;letter-spacing:2px;text-transform:uppercase;margin-bottom:10px;font-family:monospace}
.quiz-question{font-size:.98rem;font-weight:700;color:var(--white);margin-bottom:18px;line-height:1.5}
.quiz-options{display:flex;flex-direction:column;gap:8px}
.quiz-option{display:flex;align-items:center;gap:12px;padding:13px 16px;border:1px solid var(--border);cursor:pointer;transition:var(--t);background:var(--surface-2)}
.quiz-option:hover{border-color:var(--border-hi);background:var(--surface-3)}
.quiz-option.selected{border-color:var(--border-hi);background:var(--red-soft)}
.quiz-option.correct{border-color:rgba(29,185,84,.4);background:rgba(29,185,84,.08)}
.quiz-option.wrong{border-color:rgba(248,113,113,.4);background:rgba(248,113,113,.07)}
.quiz-option-letter{width:28px;height:28px;border-radius:2px;border:1px solid var(--border);display:flex;align-items:center;justify-content:center;font-size:.74rem;font-weight:800;color:var(--muted);flex-shrink:0;font-family:monospace;transition:var(--t)}
.quiz-option.selected .quiz-option-letter{border-color:var(--border-hi);color:var(--white)}
.quiz-option.correct .quiz-option-letter{background:var(--green);border-color:var(--green);color:var(--bg)}
.quiz-option.wrong .quiz-option-letter{background:#F87171;border-color:#F87171;color:var(--bg)}
.quiz-option-text{font-size:.88rem;color:var(--white-dim);flex:1}
.quiz-explanation{margin-top:14px;padding:12px 16px;background:var(--surface-3);border-right:2px solid var(--red);font-size:.85rem;color:var(--white-dim)}
.quiz-footer{padding:18px 24px;border-top:1px solid var(--border);display:flex;align-items:center;justify-content:space-between}
.quiz-result{text-align:center;padding:40px 24px}
.quiz-result-score{font-size:3.5rem;font-weight:900;color:var(--white);line-height:1;font-family:monospace}
.quiz-result-label{font-size:.78rem;color:var(--muted);margin-top:6px;letter-spacing:1px;text-transform:uppercase}

/* ── PROFILE ── */
.profile-cover{height:160px;background:linear-gradient(135deg,var(--surface),var(--surface-2));position:relative;overflow:hidden}
.profile-cover img{width:100%;height:100%;object-fit:cover}

/* ── RESPONSIVE ── */
@media(max-width:1100px){.sidebar-right{display:none}}
@media(max-width:768px){
  .sidebar-left{display:none}
  .main-area{padding:16px}
  .navbar-inner{padding:0 16px}
  .nav-links{display:none}
  .stats-grid{grid-template-columns:repeat(2,1fr)}
  .course-grid{grid-template-columns:1fr}
  .grid-2,.grid-3{grid-template-columns:1fr}
  .player-layout{grid-template-columns:1fr}
  .player-sidebar{height:auto;position:relative;top:auto}
}

/* ── SECURE VIDEO PLAYER ── */
.secure-player-wrap{position:relative;aspect-ratio:16/9;background:#000;overflow:hidden;user-select:none;-webkit-user-select:none}
#sp-video{width:100%;height:100%;object-fit:contain;display:block}
.sp-watermark{position:absolute;pointer-events:none;z-index:20;transition:all .5s ease}
.sp-controls{position:absolute;bottom:0;left:0;right:0;background:linear-gradient(transparent,rgba(0,0,0,.8));padding:8px 14px 10px;z-index:15;opacity:0;transition:opacity .2s}
.secure-player-wrap:hover .sp-controls{opacity:1}
.sp-progress-wrap{cursor:pointer;padding:6px 0;margin-bottom:6px}
.sp-progress-bg{height:3px;background:rgba(255,255,255,.2);border-radius:2px;position:relative}
.sp-progress-fill{height:100%;background:var(--red);border-radius:2px;transition:width .1s linear}
.sp-time{font-size:.67rem;color:rgba(237,232,232,.6);font-family:monospace;margin-top:4px}
.sp-buttons{display:flex;align-items:center;gap:10px}
.sp-btn{background:none;border:none;color:rgba(237,232,232,.8);cursor:pointer;padding:4px;display:flex;align-items:center;transition:.15s}
.sp-btn:hover{color:var(--white)}

/* ── MISSING VARIABLE ALIASES ── */
:root {
  --danger:      #F87171;
  --success:     #1DB954;
  --white-muted: rgba(237,232,232,.45);
  --m:           #5A4A4A;
  --w:           #EDE8E8;
  --r:           #B80000;
  --s:           #0E0909;
}