/* ============================================================
   3lite Education Portal — Shared Styles
   Design System: "Lab Terminal" Aesthetic
   ============================================================ */

@import url('https://fonts.googleapis.com/css2?family=Space+Mono:ital,wght@0,400;0,700;1,400&family=DM+Sans:opsz,wght@9..40,300;9..40,400;9..40,500;9..40,600;9..40,700;9..40,800&display=swap');

:root {
  --bg: #080a0f; --bg-raised: #0d1017; --bg-surface: #121620; --bg-elevated: #171d2a; --bg-hover: #1e2535;
  --border: rgba(255,255,255,0.07); --border-mid: rgba(255,255,255,0.12); --border-strong: rgba(255,255,255,0.22);
  --text-primary: #e8edf5; --text-secondary: #6b7a99; --text-muted: #3d4a63;
  --cyan: #00e5cc; --blue: #3b82f6; --green: #22d3a1; --orange: #f59e0b; --red: #ef4444; --purple: #a855f7;
  --glow-cyan: 0 0 20px rgba(0,229,204,0.3), 0 0 60px rgba(0,229,204,0.1);
  --glass: rgba(13,16,23,0.92); --grad-brand: linear-gradient(135deg,#00e5cc,#3b82f6);
  --font-ui: 'DM Sans',sans-serif; --font-mono: 'Space Mono',monospace;
  --r-sm:8px; --r-md:14px; --r-lg:20px; --r-xl:28px; --r-2xl:36px;
  --ease-spring: cubic-bezier(0.175,0.885,0.32,1.275);
  --ease-smooth: cubic-bezier(0.4,0,0.2,1);
  --sidebar-w: 240px;
}
body.light-mode {
  --bg:#f0f2f7; --bg-raised:#f7f8fc; --bg-surface:#fff; --bg-elevated:#fff; --bg-hover:#eef0f7;
  --border:rgba(0,0,0,0.07); --border-mid:rgba(0,0,0,0.11); --border-strong:rgba(0,0,0,0.2);
  --text-primary:#111827; --text-secondary:#6b7280; --text-muted:#9ca3af;
  --cyan:#009e8e; --blue:#2563eb; --green:#059669; --orange:#d97706; --red:#dc2626; --purple:#7c3aed;
  --glow-cyan:none; --glass:rgba(255,255,255,0.95); --grad-brand:linear-gradient(135deg,#009e8e,#2563eb);
}

*,*::before,*::after { box-sizing:border-box; margin:0; padding:0; }
html { -webkit-text-size-adjust:100%; }
body { font-family:var(--font-ui); font-size:15px; line-height:1.5; color:var(--text-primary); background:var(--bg); min-height:100vh; -webkit-font-smoothing:antialiased; transition:background .4s var(--ease-smooth),color .4s; overflow-x:hidden; }
img,svg { display:block; }
button { font-family:var(--font-ui); cursor:pointer; border:none; background:none; }
a { color:inherit; text-decoration:none; }
input,textarea,select { font-family:var(--font-ui); -webkit-user-select:text; user-select:text; }

/* ── BACKGROUND ── */
.fluid-bg { position:fixed; inset:0; z-index:0; pointer-events:none; overflow:hidden; }
.fluid-bg::before { content:''; position:absolute; inset:0; background-image:linear-gradient(rgba(0,229,204,.015) 1px,transparent 1px),linear-gradient(90deg,rgba(0,229,204,.015) 1px,transparent 1px); background-size:56px 56px; mask-image:radial-gradient(ellipse 100% 100% at 50% 0%,black,transparent); animation:grid-drift 50s linear infinite; }
body.light-mode .fluid-bg::before { background-image:linear-gradient(rgba(0,0,0,.015) 1px,transparent 1px),linear-gradient(90deg,rgba(0,0,0,.015) 1px,transparent 1px); opacity:.5; }
@keyframes grid-drift { to { transform:translateY(56px) } }

/* ── PORTAL LAYOUT ── */
.portal-layout { display:flex; min-height:100vh; position:relative; z-index:1; }

/* ── SIDEBAR ── */
.sidebar {
  width:var(--sidebar-w); flex-shrink:0;
  background:var(--bg-raised); border-right:1px solid var(--border);
  display:flex; flex-direction:column;
  position:fixed; top:0; left:0; bottom:0; z-index:200;
  transition:transform .3s var(--ease-spring);
}
.sidebar-brand { padding:20px 20px 16px; border-bottom:1px solid var(--border); }
.sidebar-brand-name { font-family:var(--font-mono); font-size:13px; font-weight:700; letter-spacing:.15em; text-transform:uppercase; background:var(--grad-brand); -webkit-background-clip:text; -webkit-text-fill-color:transparent; background-clip:text; }
.sidebar-brand-sub { font-size:10px; font-weight:500; letter-spacing:.06em; color:var(--text-muted); text-transform:uppercase; margin-top:2px; }
.sidebar-role { display:inline-flex; align-items:center; gap:4px; margin-top:8px; font-family:var(--font-mono); font-size:9px; font-weight:700; letter-spacing:.12em; text-transform:uppercase; padding:3px 8px; border-radius:100px; }
.role-student  { background:rgba(0,229,204,.1);  color:var(--cyan);   border:1px solid rgba(0,229,204,.2); }
.role-parent   { background:rgba(59,130,246,.1); color:var(--blue);   border:1px solid rgba(59,130,246,.2); }
.role-tutor    { background:rgba(168,85,247,.1); color:var(--purple); border:1px solid rgba(168,85,247,.2); }
.role-admin    { background:rgba(245,158,11,.1); color:var(--orange); border:1px solid rgba(245,158,11,.2); }

.sidebar-nav { flex:1; overflow-y:auto; padding:12px 10px; }
.nav-section-label { font-family:var(--font-mono); font-size:9px; font-weight:700; letter-spacing:.16em; text-transform:uppercase; color:var(--text-muted); padding:8px 10px 4px; }
.nav-item { display:flex; align-items:center; gap:10px; padding:10px 12px; border-radius:var(--r-md); font-size:13px; font-weight:600; color:var(--text-secondary); cursor:pointer; transition:all .2s var(--ease-smooth); margin-bottom:2px; }
.nav-item:hover { color:var(--text-primary); background:var(--bg-hover); }
.nav-item.active { color:var(--cyan); background:rgba(0,229,204,.08); }
.nav-item-icon { font-size:16px; width:20px; text-align:center; flex-shrink:0; }
.nav-item-badge { margin-left:auto; font-family:var(--font-mono); font-size:9px; font-weight:700; background:var(--red); color:#fff; border-radius:100px; padding:2px 6px; }

.sidebar-footer { padding:14px 10px; border-top:1px solid var(--border); }
.sidebar-user { display:flex; align-items:center; gap:10px; padding:10px 12px; border-radius:var(--r-md); }
.sidebar-avatar { width:32px; height:32px; border-radius:50%; background:linear-gradient(135deg,rgba(0,229,204,.2),rgba(59,130,246,.15)); border:1px solid rgba(0,229,204,.25); display:flex; align-items:center; justify-content:center; font-family:var(--font-mono); font-size:11px; font-weight:700; color:var(--cyan); flex-shrink:0; }
.sidebar-user-name { font-size:13px; font-weight:600; color:var(--text-primary); }
.sidebar-user-email { font-size:11px; color:var(--text-muted); }
.btn-logout { display:flex; align-items:center; gap:8px; width:100%; padding:9px 12px; border-radius:var(--r-md); font-size:13px; font-weight:600; color:var(--text-muted); transition:all .2s; margin-top:4px; }
.btn-logout:hover { color:var(--red); background:rgba(239,68,68,.07); }

/* ── MAIN CONTENT ── */
.main-content { margin-left:var(--sidebar-w); flex:1; min-height:100vh; padding:0; }
.topbar { display:flex; align-items:center; justify-content:space-between; padding:16px 28px; border-bottom:1px solid var(--border); background:var(--glass); backdrop-filter:blur(12px); -webkit-backdrop-filter:blur(12px); position:sticky; top:0; z-index:100; }
.topbar-title { font-size:18px; font-weight:800; color:var(--text-primary); }
.topbar-actions { display:flex; align-items:center; gap:10px; }
.page-body { padding:28px; max-width:1100px; }

/* ── TOGGLE ── */
.toggle-group { display:flex; align-items:center; gap:7px; }
.toggle-pill { position:relative; width:44px; height:24px; flex-shrink:0; }
.toggle-pill input { opacity:0; width:0; height:0; position:absolute; }
.toggle-track { position:absolute; inset:0; background:var(--bg-elevated); border:1px solid var(--border-mid); border-radius:100px; cursor:pointer; transition:all .3s; }
.toggle-track::before { content:''; position:absolute; top:3px; left:3px; width:16px; height:16px; border-radius:50%; background:var(--text-muted); transition:all .3s var(--ease-spring); }
.toggle-pill input:checked+.toggle-track { background:rgba(0,229,204,.15); border-color:rgba(0,229,204,.4); }
.toggle-pill input:checked+.toggle-track::before { transform:translateX(20px); background:var(--cyan); box-shadow:0 0 8px rgba(0,229,204,.6); }

/* ── STAT CARDS ── */
.stats-grid { display:grid; grid-template-columns:repeat(auto-fill,minmax(180px,1fr)); gap:14px; margin-bottom:24px; }
.stat-card { background:var(--bg-surface); border:1px solid var(--border); border-radius:var(--r-xl); padding:20px; position:relative; overflow:hidden; transition:border-color .25s,transform .2s var(--ease-spring); }
.stat-card::before { content:''; position:absolute; top:0; left:20%;right:20%; height:1px; background:linear-gradient(90deg,transparent,rgba(255,255,255,.08),transparent); }
.stat-card:hover { border-color:rgba(0,229,204,.14); transform:translateY(-2px); }
.stat-icon { font-size:22px; margin-bottom:10px; }
.stat-val { font-family:var(--font-mono); font-size:28px; font-weight:700; background:var(--grad-brand); -webkit-background-clip:text; -webkit-text-fill-color:transparent; background-clip:text; line-height:1; }
.stat-label { font-size:12px; color:var(--text-muted); margin-top:4px; font-weight:500; }

/* ── PANEL ── */
.panel { background:var(--bg-surface); border:1px solid var(--border); border-radius:var(--r-xl); padding:24px; margin-bottom:20px; position:relative; overflow:hidden; transition:border-color .3s,box-shadow .3s; }
.panel::before { content:''; position:absolute; top:0; left:15%;right:15%; height:1px; background:linear-gradient(90deg,transparent,rgba(255,255,255,.08),transparent); }
.panel:hover { border-color:rgba(0,229,204,.12); }
.panel-header { display:flex; align-items:center; justify-content:space-between; margin-bottom:18px; }
.panel-title { font-size:15px; font-weight:700; color:var(--text-primary); }
.eyebrow { font-family:var(--font-mono); font-size:10px; font-weight:700; letter-spacing:.18em; text-transform:uppercase; background:var(--grad-brand); -webkit-background-clip:text; -webkit-text-fill-color:transparent; background-clip:text; margin-bottom:6px; }

/* ── TABLE ── */
.data-table { width:100%; border-collapse:collapse; font-size:13px; }
.data-table th { padding:8px 12px; border-bottom:1px solid var(--border-mid); color:var(--text-muted); font-family:var(--font-mono); font-size:10px; font-weight:700; letter-spacing:.1em; text-transform:uppercase; text-align:left; }
.data-table td { padding:12px 12px; border-bottom:1px solid var(--border); color:var(--text-secondary); vertical-align:middle; }
.data-table tr:last-child td { border-bottom:none; }
.data-table tr:hover td { background:var(--bg-hover); }

/* ── BADGES ── */
.badge { font-family:var(--font-mono); font-size:9px; font-weight:700; letter-spacing:.1em; text-transform:uppercase; padding:3px 8px; border-radius:100px; display:inline-flex; align-items:center; }
.badge-confirmed { background:rgba(34,211,161,.1); color:var(--green); border:1px solid rgba(34,211,161,.2); }
.badge-pending   { background:rgba(245,158,11,.1); color:var(--orange); border:1px solid rgba(245,158,11,.2); }
.badge-cancelled { background:rgba(239,68,68,.1);  color:var(--red);    border:1px solid rgba(239,68,68,.2); }
.badge-online    { background:rgba(0,229,204,.07);  color:var(--cyan);   border:1px solid rgba(0,229,204,.18); }
.badge-offline   { background:rgba(168,85,247,.07); color:var(--purple); border:1px solid rgba(168,85,247,.18); }
.badge-new      { background:rgba(59,130,246,.1); color:var(--blue); border:1px solid rgba(59,130,246,.2); }
.badge-reviewed { background:rgba(168,85,247,.1); color:var(--purple); border:1px solid rgba(168,85,247,.2); }
.badge-enrolled { background:rgba(34,211,161,.1); color:var(--green); border:1px solid rgba(34,211,161,.2); }
.badge-declined { background:rgba(239,68,68,.1);  color:var(--red);   border:1px solid rgba(239,68,68,.2); }

/* ── INPUTS ── */
.input-label { font-family:var(--font-mono); font-size:10px; font-weight:700; letter-spacing:.14em; text-transform:uppercase; color:var(--text-muted); margin-bottom:6px; display:block; }
.input-field { width:100%; height:48px; padding:0 14px; background:var(--bg-raised); border:1px solid var(--border-mid); border-radius:var(--r-md); font-size:14px; color:var(--text-primary); outline:none; transition:all .2s var(--ease-smooth); -webkit-appearance:none; appearance:none; }
.input-field::placeholder { color:var(--text-muted); font-size:13px; }
.input-field:focus { border-color:rgba(0,229,204,.6); background:var(--bg-surface); box-shadow:0 0 0 3px rgba(0,229,204,.08); }
select.input-field { cursor:pointer; background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='8' fill='none'%3E%3Cpath d='M1 1l5 5 5-5' stroke='%236b7a99' stroke-width='1.5' stroke-linecap='round' stroke-linejoin='round'/%3E%3C/svg%3E"); background-repeat:no-repeat; background-position:right 14px center; padding-right:36px; }
textarea.input-field { height:auto; padding:12px 14px; resize:vertical; min-height:80px; }
.input-wrap { display:flex; flex-direction:column; margin-bottom:14px; }
.input-grid { display:grid; grid-template-columns:1fr 1fr; gap:14px; }

/* ── BUTTONS ── */
.btn { display:inline-flex; align-items:center; justify-content:center; gap:8px; height:44px; padding:0 20px; border-radius:var(--r-md); font-size:14px; font-weight:700; cursor:pointer; border:none; outline:none; transition:all .2s var(--ease-spring); position:relative; overflow:hidden; }
.btn:active { transform:scale(.97); }
.btn-primary { background:var(--grad-brand); color:#030608; box-shadow:0 4px 16px rgba(0,229,204,.2); }
.btn-primary:hover { box-shadow:0 6px 28px rgba(0,229,204,.4); transform:translateY(-1px); }
.btn-ghost { background:transparent; border:1px solid var(--border-mid); color:var(--text-secondary); }
.btn-ghost:hover { border-color:var(--border-strong); color:var(--text-primary); }
.btn-danger { background:rgba(239,68,68,.12); border:1px solid rgba(239,68,68,.25); color:var(--red); }
.btn-danger:hover { background:rgba(239,68,68,.2); }
.btn-sm { height:34px; font-size:12px; padding:0 14px; }
body.light-mode .btn-primary { color:#fff; }

/* ── MODAL ── */
.modal-overlay { position:fixed; inset:0; background:rgba(0,0,0,.65); backdrop-filter:blur(6px); -webkit-backdrop-filter:blur(6px); z-index:1000; display:flex; align-items:center; justify-content:center; padding:20px; opacity:0; pointer-events:none; transition:opacity .3s; }
.modal-overlay.open { opacity:1; pointer-events:all; }
.modal { background:var(--bg-surface); border:1px solid var(--border-mid); border-radius:var(--r-2xl); padding:28px; width:100%; max-width:480px; transform:scale(.93) translateY(16px); transition:transform .3s var(--ease-spring); max-height:90vh; overflow-y:auto; }
.modal-overlay.open .modal { transform:scale(1) translateY(0); }
.modal-header { display:flex; align-items:center; justify-content:space-between; margin-bottom:20px; }
.modal-title { font-size:17px; font-weight:800; color:var(--text-primary); }
.modal-close { width:32px; height:32px; border-radius:50%; background:var(--bg-elevated); border:1px solid var(--border-mid); color:var(--text-muted); font-size:14px; display:flex; align-items:center; justify-content:center; cursor:pointer; transition:all .15s; }
.modal-close:hover { border-color:var(--red); color:var(--red); }
.modal-actions { display:flex; gap:10px; margin-top:20px; }
.modal-actions .btn { flex:1; }

/* ── TOAST ── */
#toast { position:fixed; top:-80px; left:50%; transform:translateX(-50%); z-index:9999; display:flex; align-items:center; gap:8px; padding:11px 20px; background:var(--bg-elevated); border:1px solid var(--border-mid); border-radius:100px; font-size:14px; font-weight:600; color:var(--text-primary); white-space:nowrap; box-shadow:0 8px 32px rgba(0,0,0,.4); transition:top .45s var(--ease-spring); }
#toast.show { top:16px; }
#toast.success { border-color:rgba(34,211,161,.4); color:var(--green); }
#toast.error   { border-color:rgba(239,68,68,.4);  color:var(--red); }
#toast.info    { border-color:rgba(0,229,204,.3);   color:var(--cyan); }

/* ── LOADING ── */
.spinner { width:16px; height:16px; border:2px solid rgba(0,229,204,.25); border-top-color:var(--cyan); border-radius:50%; animation:spin .6s linear infinite; flex-shrink:0; display:inline-block; }
.loading-state { display:flex; align-items:center; justify-content:center; gap:10px; padding:40px; color:var(--text-muted); font-size:13px; }
@keyframes spin { to { transform:rotate(360deg) } }
@keyframes fade-up { from { opacity:0;transform:translateY(12px) } to { opacity:1;transform:translateY(0) } }
.fade-up { animation:fade-up .35s var(--ease-smooth) both; }

/* ── TABS ── */
.tab-bar { display:flex; background:var(--bg-raised); border:1px solid var(--border); border-radius:var(--r-xl); padding:5px; gap:3px; margin-bottom:20px; }
.tab-btn { flex:1; text-align:center; padding:9px 10px; font-size:13px; font-weight:600; color:var(--text-secondary); border-radius:var(--r-lg); cursor:pointer; transition:all .2s; border:none; background:none; white-space:nowrap; }
.tab-btn:hover:not(.active) { color:var(--text-primary); background:var(--bg-hover); }
.tab-btn.active { background:linear-gradient(135deg,rgba(0,229,204,.12),rgba(59,130,246,.07)); color:var(--cyan); box-shadow:0 1px 8px rgba(0,0,0,.3),0 0 0 1px rgba(0,229,204,.2); }
.tab-panel { display:none; }
.tab-panel.active { display:block; animation:fade-up .3s var(--ease-smooth) both; }

/* ── EMPTY STATE ── */
.empty-state { text-align:center; padding:48px 20px; color:var(--text-muted); }
.empty-icon { font-size:36px; margin-bottom:10px; }
.empty-title { font-size:15px; font-weight:700; color:var(--text-secondary); margin-bottom:4px; }
.empty-desc { font-size:13px; }

/* ── MOBILE ── */
.sidebar-toggle { display:none; }
@media (max-width:768px) {
  .sidebar { transform:translateX(-100%); }
  .sidebar.open { transform:translateX(0); }
  .sidebar-overlay { position:fixed; inset:0; background:rgba(0,0,0,.5); z-index:199; display:none; }
  .sidebar-overlay.open { display:block; }
  .sidebar-toggle { display:flex; align-items:center; justify-content:center; width:36px; height:36px; border-radius:var(--r-sm); background:var(--bg-elevated); border:1px solid var(--border-mid); color:var(--text-secondary); font-size:18px; cursor:pointer; }
  .main-content { margin-left:0; }
  .page-body { padding:16px; }
  .topbar { padding:12px 16px; }
  .input-grid { grid-template-columns:1fr; }
  .stats-grid { grid-template-columns:1fr 1fr; }
  .modal-actions { flex-direction:column; }
}