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

:root {
  --bg: #0c1220;
  --surface: #131b2e;
  --surface-2: #1a2540;
  --card: #17203a;
  --border: #253157;
  --text: #eef2fb;
  --text-muted: #8d9ac2;
  --gold: #f2b134;
  --gold-dim: #a67d2c;
  --teal: #33d6b8;
  --rose: #ef6f6f;
  --radius: 14px;
  --radius-lg: 22px;
  --shadow: 0 20px 50px -20px rgba(0, 0, 0, 0.6);
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
  background: radial-gradient(circle at 20% -10%, #1a2447 0%, var(--bg) 55%);
  color: var(--text);
  font-family: 'Inter', system-ui, sans-serif;
  min-height: 100vh;
}

h1, h2, h3, .display {
  font-family: 'Sora', system-ui, sans-serif;
  letter-spacing: -0.01em;
}

a { color: var(--gold); text-decoration: none; }

/* ---------- Layout shells ---------- */
.app-shell { min-height: 100vh; display: flex; flex-direction: column; }

.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 16px 28px;
  border-bottom: 1px solid var(--border);
  background: rgba(12, 18, 32, 0.85);
  backdrop-filter: blur(10px);
  position: sticky;
  top: 0;
  z-index: 20;
}

.brand { display: flex; align-items: center; gap: 10px; font-family: 'Sora'; font-weight: 700; font-size: 18px; }

/* Signature element: the "campus seal" — a notched ring standing in for a
   verified university ID badge, used as the logo mark and around avatars. */
.seal {
  width: 34px; height: 34px; border-radius: 50%;
  background: conic-gradient(from 90deg, var(--gold), var(--teal), var(--gold));
  display: flex; align-items: center; justify-content: center;
  position: relative;
  flex-shrink: 0;
}
.seal::after {
  content: "";
  width: 26px; height: 26px; border-radius: 50%;
  background: var(--bg);
  position: absolute;
}
.seal-mark { position: relative; z-index: 1; font-size: 13px; font-weight: 800; color: var(--gold); font-family: 'Sora'; }

.brand-logo { width: 34px; height: 34px; border-radius: 50%; object-fit: cover; flex-shrink: 0; display: block; }
.auth-brand .brand-logo { width: 52px; height: 52px; }

.avatar-ring {
  position: relative;
  width: 56px; height: 56px;
  border-radius: 50%;
  padding: 3px;
  background: var(--border);
  display: flex; align-items: center; justify-content: center;
  flex-shrink: 0;
}
.avatar-ring.online { background: conic-gradient(var(--teal), var(--gold), var(--teal)); }
.avatar-ring .avatar-inner {
  width: 100%; height: 100%; border-radius: 50%;
  background: var(--surface-2);
  display: flex; align-items: center; justify-content: center;
  font-family: 'Sora'; font-weight: 700; font-size: 18px; color: var(--text);
}

.nav-links { display: flex; gap: 18px; align-items: center; }
.nav-links a, .nav-links button { color: var(--text-muted); font-size: 14px; font-weight: 500; }
.nav-link { padding: 6px 4px; border-bottom: 2px solid transparent; position: relative; }
.nav-link-active { color: var(--gold) !important; border-bottom-color: var(--gold); }
.unread-badge {
  display: inline-flex; align-items: center; justify-content: center;
  min-width: 16px; height: 16px; padding: 0 4px; margin-left: 4px;
  background: var(--rose); color: #fff; font-size: 10px; font-weight: 700;
  border-radius: 999px; vertical-align: middle;
}

/* ---------- Mobile hamburger nav ---------- */
.mobile-only { display: none; }
.hamburger-btn {
  width: 38px; height: 38px; border-radius: 10px; border: 1px solid var(--border);
  background: var(--surface-2); display: flex; flex-direction: column; align-items: center;
  justify-content: center; gap: 4px; cursor: pointer;
}
.hamburger-btn span { width: 18px; height: 2px; background: var(--text); border-radius: 2px; transition: 0.2s; }
.hamburger-btn.open span:nth-child(1) { transform: translateY(6px) rotate(45deg); }
.hamburger-btn.open span:nth-child(2) { opacity: 0; }
.hamburger-btn.open span:nth-child(3) { transform: translateY(-6px) rotate(-45deg); }

.mobile-nav-panel {
  display: none; position: fixed; top: 0; right: -280px; width: 260px; height: 100vh;
  background: var(--card); border-left: 1px solid var(--border); padding: 80px 20px 20px;
  z-index: 101; transition: right 0.25s ease; flex-direction: column; gap: 4px;
  box-shadow: -20px 0 40px rgba(0,0,0,0.4);
}
.mobile-nav-panel.open { right: 0; }
.mobile-nav-panel a {
  padding: 12px 10px; border-radius: 10px; font-size: 15px; font-weight: 600; color: var(--text);
}
.mobile-nav-panel a.nav-link-active { background: rgba(242, 177, 52, 0.1); color: var(--gold) !important; border-bottom: none; }
.mobile-nav-backdrop {
  display: none; position: fixed; inset: 0; background: rgba(5,8,16,0.6); z-index: 100;
  opacity: 0; pointer-events: none; transition: opacity 0.25s ease;
}
.mobile-nav-backdrop.open { opacity: 1; pointer-events: auto; }

@media (max-width: 720px) {
  .desktop-only { display: none; }
  .mobile-only { display: flex; }
  .mobile-nav-panel { display: flex; }
  .mobile-nav-backdrop { display: block; }
}

@media (max-width: 640px) { .hide-mobile { display: none; } }

main.container {
  max-width: 1080px;
  width: 100%;
  margin: 0 auto;
  padding: 32px 24px 80px;
  flex: 1;
}

/* ---------- Auth pages ---------- */
.auth-wrap {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 24px;
}
.auth-card {
  width: 100%;
  max-width: 420px;
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 36px 32px;
  box-shadow: var(--shadow);
}
.auth-card h1 { font-size: 22px; margin: 18px 0 4px; }
.auth-sub { color: var(--text-muted); font-size: 14px; margin-bottom: 24px; }
.auth-brand { display: flex; flex-direction: column; align-items: flex-start; gap: 10px; }
.auth-brand .seal { width: 46px; height: 46px; }
.auth-brand .seal-mark { font-size: 17px; }

.tab-switch { display: flex; background: var(--surface-2); border-radius: 999px; padding: 4px; margin-bottom: 22px; }
.tab-switch button {
  flex: 1; border: none; background: transparent; color: var(--text-muted);
  padding: 9px 0; border-radius: 999px; font-weight: 600; font-size: 13.5px; cursor: pointer;
  font-family: 'Inter'; transition: 0.2s;
}
.tab-switch button.active { background: var(--gold); color: #1a1206; }

.field { margin-bottom: 14px; }
.field label { display: block; font-size: 12.5px; color: var(--text-muted); margin-bottom: 6px; font-weight: 600; }
.field input, .field select, .field textarea {
  width: 100%; padding: 11px 13px; border-radius: 10px;
  border: 1px solid var(--border); background: var(--surface); color: var(--text);
  font-family: 'Inter'; font-size: 14px; outline: none; transition: border-color 0.15s;
}
.field input:focus, .field select:focus, .field textarea:focus { border-color: var(--gold); }
.field-row { display: flex; gap: 10px; }
.field-row .field { flex: 1; }

.role-toggle { display: flex; gap: 10px; margin-bottom: 16px; }
.role-toggle label {
  flex: 1; text-align: center; padding: 10px; border-radius: 10px; border: 1px solid var(--border);
  cursor: pointer; font-size: 13.5px; font-weight: 600; color: var(--text-muted);
}
.role-toggle input { display: none; }
.role-toggle input:checked + span { color: #1a1206; }
.role-toggle label:has(input:checked) { background: var(--gold); border-color: var(--gold); color: #1a1206; }

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  padding: 11px 20px; border-radius: 10px; border: none; cursor: pointer;
  font-family: 'Inter'; font-weight: 600; font-size: 14px; transition: transform 0.12s, opacity 0.12s;
}
.btn:active { transform: scale(0.98); }
.btn-primary { background: var(--gold); color: #1a1206; }
.btn-primary:hover { opacity: 0.92; }
.btn-secondary { background: var(--surface-2); color: var(--text); border: 1px solid var(--border); }
.btn-teal { background: var(--teal); color: #052b24; }
.btn-danger { background: transparent; color: var(--rose); border: 1px solid rgba(239, 111, 111, 0.4); }
.btn-block { width: 100%; }
.btn-sm { padding: 7px 14px; font-size: 12.5px; }
.btn:disabled { opacity: 0.5; cursor: not-allowed; }

/* ---------- Cards / sections ---------- */
.card { background: var(--card); border: 1px solid var(--border); border-radius: var(--radius-lg); padding: 22px; }
.section-title { display: flex; align-items: center; justify-content: space-between; margin-bottom: 16px; }
.section-title h2 { font-size: 18px; margin: 0; }
.eyebrow { font-size: 11.5px; text-transform: uppercase; letter-spacing: 0.08em; color: var(--gold); font-weight: 700; margin-bottom: 6px; }

.stat-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(150px, 1fr)); gap: 14px; margin-bottom: 26px; }
.stat-box { background: var(--card); border: 1px solid var(--border); border-radius: var(--radius); padding: 18px; }
.stat-box .num { font-family: 'Sora'; font-size: 26px; font-weight: 700; }
.stat-box .label { font-size: 12px; color: var(--text-muted); margin-top: 4px; }

/* ---------- Filters / chips ---------- */
.chip-row { display: flex; gap: 8px; flex-wrap: wrap; margin-bottom: 20px; }
.chip {
  padding: 7px 14px; border-radius: 999px; border: 1px solid var(--border); background: var(--surface);
  font-size: 12.5px; font-weight: 600; color: var(--text-muted); cursor: pointer; transition: 0.15s;
}
.chip.active { background: var(--gold); color: #1a1206; border-color: var(--gold); }

/* ---------- Teacher list ---------- */
.teacher-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(280px, 1fr)); gap: 16px; }
.teacher-card { background: var(--card); border: 1px solid var(--border); border-radius: var(--radius-lg); padding: 18px; display: flex; flex-direction: column; gap: 12px; }
.teacher-card .head { display: flex; gap: 12px; align-items: center; }
.teacher-card .name-row { display: flex; align-items: center; gap: 8px; }
.teacher-card .name { font-family: 'Sora'; font-weight: 700; font-size: 15.5px; }
.teacher-card .uni { color: var(--gold); font-size: 12px; font-weight: 600; }
.badge-status { font-size: 10.5px; padding: 2px 8px; border-radius: 999px; font-weight: 700; }
.badge-online { background: rgba(51, 214, 184, 0.15); color: var(--teal); }
.badge-offline { background: rgba(141, 154, 194, 0.15); color: var(--text-muted); }
.badge-girls { background: rgba(239, 111, 111, 0.15); color: var(--rose); font-size: 10px; padding: 2px 8px; border-radius: 999px; font-weight: 700; }
.teacher-card .bio { font-size: 13px; color: var(--text-muted); line-height: 1.5; min-height: 38px; }
.teacher-card .meta-row { display: flex; justify-content: space-between; font-size: 12.5px; color: var(--text-muted); }
.stars { color: var(--gold); font-weight: 700; }

/* ---------- Package modal ---------- */
.modal-overlay {
  position: fixed; inset: 0; background: rgba(5, 8, 16, 0.7); backdrop-filter: blur(4px);
  display: flex; align-items: center; justify-content: center; z-index: 100; padding: 20px;
}
.modal { background: var(--card); border: 1px solid var(--border); border-radius: var(--radius-lg); padding: 26px; width: 100%; max-width: 420px; }
.pkg-option {
  display: flex; justify-content: space-between; align-items: center; padding: 13px 16px;
  border: 1px solid var(--border); border-radius: 12px; margin-bottom: 10px; cursor: pointer; transition: 0.15s;
}
.pkg-option:hover { border-color: var(--gold); }
.pkg-option.selected { border-color: var(--gold); background: rgba(242, 177, 52, 0.08); }
.pkg-option .mins { font-weight: 700; font-family: 'Sora'; }
.pkg-option .price { color: var(--gold); font-weight: 700; }

/* ---------- Wallet ---------- */
.wallet-hero { display: flex; align-items: center; justify-content: space-between; gap: 20px; flex-wrap: wrap; }
.wallet-balance { font-family: 'Sora'; font-size: 34px; font-weight: 800; }
.wallet-balance small { font-size: 15px; color: var(--text-muted); font-weight: 500; }

/* ---------- Call screen ---------- */
.call-shell { min-height: 100vh; display: flex; flex-direction: column; background: #05070d; }
.call-stage { flex: 1; position: relative; overflow: hidden; }
.remote-video { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover; background: #0a0e18; }
.call-waiting {
  position: absolute; top: 50%; left: 50%; transform: translate(-50%, -50%);
  width: 80%; z-index: 2;
}
.local-video-wrap {
  position: absolute; bottom: 110px; right: 22px; width: 150px; height: 200px;
  border-radius: 16px; overflow: hidden; border: 2px solid var(--border); box-shadow: var(--shadow);
}
.local-video { width: 100%; height: 100%; object-fit: cover; transform: scaleX(-1); }
.call-status { position: absolute; top: 22px; left: 50%; transform: translateX(-50%); text-align: center; }
.call-status .name { font-family: 'Sora'; font-weight: 700; font-size: 17px; }
.call-status .timer { color: var(--teal); font-variant-numeric: tabular-nums; font-size: 13px; margin-top: 3px; }
.call-controls { display: flex; justify-content: center; gap: 16px; padding: 24px; background: rgba(12,18,32,0.6); }
.ctrl-btn {
  width: 56px; height: 56px; border-radius: 50%; border: none; cursor: pointer;
  display: flex; align-items: center; justify-content: center; font-size: 20px;
  background: var(--surface-2); color: var(--text); transition: 0.15s;
}
.ctrl-btn.off { background: rgba(239, 111, 111, 0.2); color: var(--rose); }
.ctrl-btn.end { background: var(--rose); color: #2b0505; }
.call-waiting { color: var(--text-muted); text-align: center; }

/* ---------- Review / rating ---------- */
.star-input { display: flex; gap: 6px; font-size: 30px; cursor: pointer; }
.star-input span { color: var(--border); transition: 0.1s; }
.star-input span.filled { color: var(--gold); }

/* ---------- Toasts ---------- */
#toast-container { position: fixed; bottom: 22px; right: 22px; display: flex; flex-direction: column; gap: 10px; z-index: 200; }
.toast {
  background: var(--card); border: 1px solid var(--border); padding: 12px 16px; border-radius: 10px;
  font-size: 13.5px; box-shadow: var(--shadow); opacity: 0; transform: translateY(8px); transition: 0.25s;
}
.toast-show { opacity: 1; transform: translateY(0); }
.toast-error { border-color: var(--rose); }
.toast-success { border-color: var(--teal); }

/* ---------- misc ---------- */
.empty-state { text-align: center; padding: 60px 20px; color: var(--text-muted); }
.muted { color: var(--text-muted); }
.divider { height: 1px; background: var(--border); margin: 22px 0; }
.toggle {
  position: relative; width: 44px; height: 24px; border-radius: 999px; background: var(--surface-2);
  border: 1px solid var(--border); cursor: pointer; flex-shrink: 0;
}
.toggle.on { background: var(--gold); }
.toggle .knob { position: absolute; top: 2px; left: 2px; width: 18px; height: 18px; border-radius: 50%; background: var(--text); transition: 0.2s; }
.toggle.on .knob { transform: translateX(20px); background: #1a1206; }

@media (max-width: 560px) {
  .topbar { padding: 14px 16px; }
  main.container { padding: 22px 14px 70px; }
  .local-video-wrap { width: 100px; height: 140px; bottom: 96px; right: 14px; }
}