/* ============================================================================
   admin-shell.css — MulVidya Admin Panel design system.

   Scope: ONLY the /admin-panel/ pages load this file. Nothing outside the
   Admin Panel references it, so it can never affect student-facing pages.

   Builds on the same brand tokens the rest of the site already uses
   (--bg/--surface/--gold/... from assets/auth-ui.css) but layers a more
   "control-room" futuristic language on top: glass panels, glow accents,
   animated gradient borders, and a fixed collapsible sidebar — appropriate
   for an admin console rather than the student-facing pages.
   ============================================================================ */

:root{
  /* Inherit the brand palette; admin panel adds a few of its own on top. */
  --bg:#0B0E2B; --surface:#141A45; --surface-2:#1B2358; --line:rgba(255,255,255,0.09);
  --text:#F1EFFF; --text-dim:rgba(241,239,255,0.62);
  --gold:#F2B705; --danger:#FF5C7A; --success:#3FD9A8; --info:#4C9EEB;
  --grammar:#4C9EEB; --english:#B084FF; --science:#3FD9A8; --sst:#FF8A3D;

  --accent-1:#6C8CFF; --accent-2:#B084FF; --accent-3:#4C9EEB;
  --glow: 0 0 0 1px rgba(255,255,255,0.06), 0 8px 30px rgba(76,158,235,0.10);
  --radius:18px; --radius-sm:12px;
  --sidebar-w:248px; --sidebar-w-collapsed:76px;
  --topbar-h:64px;
}

.mv-admin *{box-sizing:border-box;}
.mv-admin{
  min-height:100vh;
  background:
    radial-gradient(1100px 600px at 85% -10%, rgba(108,140,255,0.16), transparent 60%),
    radial-gradient(900px 500px at -10% 110%, rgba(76,217,168,0.10), transparent 55%),
    var(--bg);
  color:var(--text);
  font-family:'Inter',sans-serif;
}

/* ---- animated grid backdrop (subtle, purely decorative) ---- */
.mv-admin::before{
  content:"";
  position:fixed; inset:0; pointer-events:none; z-index:0;
  background-image:
    linear-gradient(rgba(255,255,255,0.028) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,0.028) 1px, transparent 1px);
  background-size:42px 42px;
  mask-image:radial-gradient(1200px 700px at 70% 0%, black, transparent 75%);
}

/* ---- layout shell ---- */
.mv-shell{display:flex; min-height:100vh; position:relative; z-index:1;}

.mv-sidebar{
  width:var(--sidebar-w); flex-shrink:0; position:sticky; top:0; height:100vh;
  background:linear-gradient(180deg, rgba(20,26,69,0.92), rgba(13,17,50,0.92));
  backdrop-filter:blur(14px);
  border-right:1px solid var(--line);
  display:flex; flex-direction:column; padding:18px 14px; gap:6px;
  transition:width .25s ease;
}
.mv-sidebar.collapsed{width:var(--sidebar-w-collapsed);}
.mv-sidebar.collapsed .mv-brand-text, .mv-sidebar.collapsed .mv-nav-label{display:none;}

.mv-brand{display:flex; align-items:center; gap:10px; padding:6px 8px 18px;}
.mv-brand-mark{
  width:36px; height:36px; border-radius:10px; flex-shrink:0;
  background:linear-gradient(135deg, var(--accent-1), var(--accent-2));
  display:flex; align-items:center; justify-content:center;
  font-family:'Baloo 2',sans-serif; font-weight:800; font-size:15px; color:#0B0E2B;
  box-shadow:0 0 22px rgba(108,140,255,0.55);
}
.mv-brand-text{font-family:'Baloo 2',sans-serif; font-weight:700; font-size:15px; line-height:1.2;}
.mv-brand-text small{display:block; font-family:'Inter',sans-serif; font-weight:500; font-size:11px; color:var(--text-dim);}

.mv-nav{display:flex; flex-direction:column; gap:3px; margin-top:4px;}
.mv-nav a{
  display:flex; align-items:center; gap:11px; padding:10px 12px; border-radius:12px;
  color:var(--text-dim); text-decoration:none; font-size:13.5px; font-weight:600;
  border:1px solid transparent; position:relative; overflow:hidden;
}
.mv-nav a .mv-nav-icon{width:18px; text-align:center; flex-shrink:0; font-size:15px;}
.mv-nav a:hover{background:var(--surface-2); color:var(--text);}
.mv-nav a.active{
  color:#fff; background:linear-gradient(90deg, rgba(108,140,255,0.22), rgba(176,132,255,0.10));
  border-color:rgba(108,140,255,0.35);
}
.mv-nav a.active::before{
  content:""; position:absolute; left:0; top:8px; bottom:8px; width:3px; border-radius:3px;
  background:linear-gradient(180deg, var(--accent-1), var(--accent-2));
}

.mv-sidebar-footer{margin-top:auto; display:flex; flex-direction:column; gap:6px;}
.mv-sidebar-footer button{
  display:flex; align-items:center; gap:10px; padding:10px 12px; border-radius:12px;
  background:transparent; border:1px solid var(--line); color:var(--danger);
  font-size:13px; font-weight:600; cursor:pointer; width:100%; text-align:left;
}
.mv-sidebar-footer button:hover{background:rgba(255,92,122,0.10);}

/* ---- main column ---- */
.mv-main{flex:1; min-width:0; display:flex; flex-direction:column;}
.mv-topbar{
  height:var(--topbar-h); flex-shrink:0; display:flex; align-items:center; justify-content:space-between;
  padding:0 26px; border-bottom:1px solid var(--line);
  background:rgba(11,14,43,0.55); backdrop-filter:blur(10px);
  position:sticky; top:0; z-index:5;
}
.mv-topbar-left{display:flex; align-items:center; gap:14px;}
.mv-menu-toggle{
  display:none; background:var(--surface-2); border:1px solid var(--line); color:var(--text);
  width:34px; height:34px; border-radius:10px; cursor:pointer; font-size:15px;
}
.mv-page-title{font-family:'Baloo 2',sans-serif; font-weight:700; font-size:18px;}
.mv-page-sub{font-size:12px; color:var(--text-dim); margin-top:1px;}
.mv-topbar-right{display:flex; align-items:center; gap:12px;}
.mv-admin-chip{
  display:flex; align-items:center; gap:8px; padding:6px 12px 6px 6px; border-radius:999px;
  background:var(--surface-2); border:1px solid var(--line); font-size:12.5px; font-weight:600;
}
.mv-admin-chip .mv-avatar{
  width:26px; height:26px; border-radius:50%; display:flex; align-items:center; justify-content:center;
  background:linear-gradient(135deg, var(--accent-3), var(--accent-1)); color:#0B0E2B; font-weight:800; font-size:11.5px;
}

.mv-content{flex:1; padding:26px; max-width:1400px; width:100%; margin:0 auto;}

/* ---- reusable pieces ---- */
.mv-stat-grid{display:grid; grid-template-columns:repeat(auto-fit, minmax(190px, 1fr)); gap:14px; margin-bottom:22px;}
.mv-card{
  background:linear-gradient(180deg, rgba(27,35,88,0.75), rgba(20,26,69,0.75));
  border:1px solid var(--line); border-radius:var(--radius); padding:18px 20px;
  box-shadow:var(--glow);
}
.mv-stat-card{position:relative; overflow:hidden;}
.mv-stat-card::after{
  content:""; position:absolute; right:-30px; top:-30px; width:110px; height:110px; border-radius:50%;
  background:radial-gradient(circle, rgba(108,140,255,0.28), transparent 70%);
}
.mv-stat-num{font-family:'Baloo 2',sans-serif; font-weight:800; font-size:28px; line-height:1;}
.mv-stat-label{font-size:12.5px; color:var(--text-dim); margin-top:6px; font-weight:600;}

.mv-section-title{font-family:'Baloo 2',sans-serif; font-weight:700; font-size:16px; margin:0 0 14px;}
.mv-panel{margin-bottom:20px;}
.mv-panel-head{display:flex; align-items:center; justify-content:space-between; margin-bottom:14px; flex-wrap:wrap; gap:10px;}

.mv-btn{
  display:inline-flex; align-items:center; gap:8px; padding:10px 16px; border-radius:12px;
  border:1px solid var(--line); background:var(--surface-2); color:var(--text);
  font-size:13px; font-weight:700; cursor:pointer; font-family:'Inter',sans-serif;
}
.mv-btn:hover{filter:brightness(1.12);}
.mv-btn.primary{
  background:linear-gradient(135deg, var(--accent-1), var(--accent-2)); border-color:transparent; color:#fff;
  box-shadow:0 6px 20px rgba(108,140,255,0.35);
}
.mv-btn.danger{background:rgba(255,92,122,0.12); border-color:rgba(255,92,122,0.35); color:var(--danger);}
.mv-btn:disabled{opacity:.45; cursor:not-allowed;}
.mv-btn.sm{padding:7px 12px; font-size:12px; border-radius:9px;}

.mv-input, .mv-select, .mv-textarea{
  width:100%; padding:10px 12px; border-radius:10px; border:1px solid var(--line);
  background:var(--surface-2); color:var(--text); font-size:13px; font-family:'Inter',sans-serif;
}
.mv-field{display:flex; flex-direction:column; gap:6px; margin-bottom:12px;}
.mv-field label{font-size:12px; font-weight:600; color:var(--text-dim);}

.mv-table{width:100%; border-collapse:collapse; font-size:13px;}
.mv-table th{text-align:left; color:var(--text-dim); font-weight:600; font-size:11.5px; text-transform:uppercase;
  letter-spacing:.04em; padding:10px 12px; border-bottom:1px solid var(--line);}
.mv-table td{padding:12px; border-bottom:1px solid var(--line); vertical-align:middle;}
.mv-table tr:last-child td{border-bottom:none;}
.mv-table tr:hover td{background:rgba(255,255,255,0.02);}

.mv-badge{display:inline-flex; align-items:center; padding:3px 10px; border-radius:999px; font-size:11px; font-weight:700;}
.mv-badge.active, .mv-badge.published{background:rgba(63,217,168,0.14); color:var(--success);}
.mv-badge.draft, .mv-badge.registered{background:rgba(242,183,5,0.14); color:var(--gold);}
.mv-badge.archived{background:rgba(255,92,122,0.14); color:var(--danger);}

.mv-empty{padding:40px 20px; text-align:center; color:var(--text-dim); font-size:13px;}
.mv-loading{padding:30px 0; text-align:center; color:var(--text-dim); font-size:13px;}
.mv-error{padding:14px 16px; border-radius:12px; background:rgba(255,92,122,0.10); border:1px solid rgba(255,92,122,0.3); color:var(--danger); font-size:13px; margin-bottom:14px;}
.mv-toast{position:fixed; bottom:22px; right:22px; z-index:50; background:var(--surface-2); border:1px solid var(--line);
  border-radius:12px; padding:12px 18px; font-size:13px; font-weight:600; box-shadow:0 10px 30px rgba(0,0,0,.4);
  animation:mv-toast-in .25s ease;}
.mv-toast.success{border-color:rgba(63,217,168,.4); color:var(--success);}
.mv-toast.error{border-color:rgba(255,92,122,.4); color:var(--danger);}
@keyframes mv-toast-in{from{opacity:0; transform:translateY(8px);} to{opacity:1; transform:translateY(0);}}

.mv-modal-backdrop{position:fixed; inset:0; background:rgba(5,7,25,0.6); backdrop-filter:blur(3px); z-index:40;
  display:flex; align-items:center; justify-content:center; padding:20px; animation:mv-fade-in .15s ease;}
.mv-modal{width:100%; max-width:440px; background:var(--surface); border:1px solid var(--line); border-radius:var(--radius);
  padding:22px; box-shadow:0 20px 60px rgba(0,0,0,.5);}
@keyframes mv-fade-in{from{opacity:0;} to{opacity:1;}}

.mv-fade-in{animation:mv-content-in .35s ease both;}
@keyframes mv-content-in{from{opacity:0; transform:translateY(6px);} to{opacity:1; transform:translateY(0);}}

.mv-badge-soon{font-size:10.5px; font-weight:700; padding:3px 9px; border-radius:999px;
  background:rgba(255,138,61,0.14); color:var(--sst); border:1px solid rgba(255,138,61,0.3);}

/* ---- responsive ---- */
@media (max-width:900px){
  .mv-sidebar{position:fixed; z-index:30; left:0; top:0; transform:translateX(-100%); transition:transform .25s ease; width:250px;}
  .mv-sidebar.mobile-open{transform:translateX(0);}
  .mv-menu-toggle{display:inline-flex; align-items:center; justify-content:center;}
  .mv-content{padding:18px;}
  .mv-stat-grid{grid-template-columns:repeat(auto-fit, minmax(140px,1fr));}
}
@media (max-width:900px){
  .mv-backdrop-mask{position:fixed; inset:0; background:rgba(0,0,0,.5); z-index:25; display:none;}
  .mv-backdrop-mask.show{display:block;}
}