/* =========================================================
   WHOSSMARTER — "Who's Smarter?"
   Visual identity: sophisticated academic + brain-competition.
   Dark navy base, electric-violet/cyan accents, crisp sans serif.
   ========================================================= */

:root {
  --navy-950: #0a0e1a;
  --navy-900: #0f1424;
  --navy-800: #161d33;
  --navy-700: #1e2745;
  --navy-600: #2a3559;
  --ink-100:  #eef1fb;
  --ink-300:  #b7c0dd;
  --ink-500:  #8590b3;
  --accent:   #6d5bff;      /* electric violet */
  --accent-2: #21e6c1;      /* brain-teal */
  --accent-warn: #ff9f43;
  --accent-danger: #ff5c7a;
  --accent-gold: #ffcc4d;
  --radius: 14px;
  --radius-sm: 8px;
  --shadow-lg: 0 20px 50px rgba(0,0,0,0.35);
  --shadow-sm: 0 4px 14px rgba(0,0,0,0.25);
  font-size: 16px;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: 'Segoe UI', 'Inter', system-ui, -apple-system, Roboto, Arial, sans-serif;
  background: radial-gradient(ellipse at top, var(--navy-800) 0%, var(--navy-950) 65%);
  color: var(--ink-100);
  min-height: 100vh;
  line-height: 1.5;
}

a { color: var(--accent-2); text-decoration: none; }
a:hover { text-decoration: underline; }

h1, h2, h3, h4 { font-weight: 700; letter-spacing: -0.01em; margin: 0 0 .5em; }

.container { max-width: 1120px; margin: 0 auto; padding: 0 20px; }
.container-narrow { max-width: 720px; margin: 0 auto; padding: 0 20px; }

/* ---------- Navbar ---------- */
.navbar {
  display: flex; align-items: center; justify-content: space-between;
  padding: 16px 28px; background: rgba(15,20,36,0.85); backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--navy-700); position: sticky; top: 0; z-index: 50;
}
.brand { display: flex; align-items: center; gap: 10px; font-weight: 800; font-size: 1.25rem; color: var(--ink-100); }
.brand .brand-mark {
  width: 36px; height: 36px; border-radius: 10px;
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  display: flex; align-items: center; justify-content: center; font-size: 1.1rem;
}

/* ---------- Hamburger toggle ---------- */
.hamburger {
  display: none; flex-direction: column; justify-content: center; gap: 5px;
  width: 40px; height: 40px; padding: 8px; background: transparent; border: 1px solid var(--navy-600);
  border-radius: 8px; cursor: pointer; margin-left: auto;
}
.hamburger span { display: block; width: 100%; height: 2px; background: var(--ink-100); border-radius: 2px; transition: transform .2s ease, opacity .2s ease; }
.hamburger.open span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.hamburger.open span:nth-child(2) { opacity: 0; }
.hamburger.open span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

.nav-menu { display: flex; align-items: center; gap: 22px; flex: 1; justify-content: flex-end; }
.nav-links { display: flex; gap: 22px; align-items: center; }
.nav-links a { color: var(--ink-300); font-weight: 600; font-size: .93rem; }
.nav-links a.active, .nav-links a:hover { color: var(--ink-100); text-decoration: none; }
.nav-user { display: flex; align-items: center; gap: 12px; }
.nav-user .pill { background: var(--navy-700); padding: 6px 14px; border-radius: 999px; font-size: .85rem; }

@media (max-width: 860px) {
  .hamburger { display: flex; }
  .nav-menu {
    display: none; position: absolute; top: 100%; left: 0; right: 0;
    flex-direction: column; align-items: stretch; gap: 0;
    background: var(--navy-900); border-bottom: 1px solid var(--navy-700);
    box-shadow: var(--shadow-lg); padding: 10px 20px 18px;
  }
  .nav-menu.open { display: flex; max-height: calc(100vh - 70px); overflow-y: auto; }
  .nav-links { flex-direction: column; align-items: flex-start; gap: 4px; width: 100%; }
  .nav-links a { padding: 10px 4px; width: 100%; border-bottom: 1px solid var(--navy-800); }
  .nav-user { flex-direction: column; align-items: stretch; gap: 10px; width: 100%; margin-top: 14px; }
  .nav-user .pill { text-align: center; }
  .nav-user .btn { width: 100%; }
}

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  padding: 12px 22px; border-radius: 10px; border: none; cursor: pointer;
  font-weight: 700; font-size: .95rem; transition: transform .12s ease, box-shadow .12s ease;
  text-decoration: none;
}
.btn:hover { transform: translateY(-1px); text-decoration: none; }
.btn-primary { background: linear-gradient(135deg, var(--accent), #8a7bff); color: #fff; box-shadow: var(--shadow-sm); }
.btn-accent  { background: linear-gradient(135deg, var(--accent-2), #17c2a4); color: #06251f; box-shadow: var(--shadow-sm); }
.btn-outline { background: transparent; border: 1px solid var(--navy-600); color: var(--ink-100); }
.btn-danger  { background: var(--accent-danger); color: #fff; }
.btn-sm { padding: 8px 14px; font-size: .82rem; border-radius: 8px; }
.btn-block { width: 100%; }
.btn:disabled { opacity: .5; cursor: not-allowed; transform: none; }

/* ---------- Cards ---------- */
.card {
  background: linear-gradient(180deg, var(--navy-800), var(--navy-900));
  border: 1px solid var(--navy-700); border-radius: var(--radius);
  padding: 26px; box-shadow: var(--shadow-sm);
}
.card + .card { margin-top: 18px; }
.card-title { font-size: 1.05rem; color: var(--ink-300); text-transform: uppercase; letter-spacing: .06em; margin-bottom: 14px; }

.grid { display: grid; gap: 18px; }
.grid-2 { grid-template-columns: repeat(2, 1fr); }
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.grid-4 { grid-template-columns: repeat(4, 1fr); }
@media (max-width: 900px) { .grid-2, .grid-3, .grid-4 { grid-template-columns: 1fr 1fr; } }
@media (max-width: 560px) { .grid-2, .grid-3, .grid-4 { grid-template-columns: 1fr; } }

.stat-box { text-align: center; padding: 18px; background: var(--navy-700); border-radius: var(--radius-sm); }
.stat-box .num { font-size: 1.9rem; font-weight: 800; color: var(--accent-2); }
.stat-box .label { font-size: .78rem; color: var(--ink-500); text-transform: uppercase; letter-spacing: .05em; margin-top: 4px; }

/* ---------- Avatar picker ---------- */
.avatar-grid { display: grid; grid-template-columns: repeat(6, 1fr); gap: 10px; margin-top: 14px; }
@media (max-width: 560px) { .avatar-grid { grid-template-columns: repeat(4, 1fr); } }
.avatar-choice {
  background: var(--navy-700); border: 2px solid transparent; border-radius: 50%;
  padding: 4px; cursor: pointer; display: flex; align-items: center; justify-content: center;
  transition: transform .1s ease, border-color .1s ease;
}
.avatar-choice img { border-radius: 50%; display: block; }
.avatar-choice:hover { transform: scale(1.06); }
.avatar-choice.selected { border-color: var(--accent-2); box-shadow: 0 0 0 2px rgba(33,230,193,.3); }

/* ---------- Forms ---------- */
label { display: block; font-size: .85rem; color: var(--ink-300); margin-bottom: 6px; font-weight: 600; }
input, select, textarea {
  width: 100%; padding: 12px 14px; border-radius: var(--radius-sm);
  border: 1px solid var(--navy-600); background: var(--navy-900); color: var(--ink-100);
  font-size: .95rem; margin-bottom: 16px; font-family: inherit;
}
input:focus, select:focus, textarea:focus { outline: none; border-color: var(--accent); }

/* Password show/hide toggle — auto-applied to every password field, see header.php script */
.password-wrapper { position: relative; margin-bottom: 16px; }
.password-wrapper input { margin-bottom: 0; padding-right: 44px; width: 100%; }
.password-toggle-btn {
  position: absolute; right: 6px; top: 50%; transform: translateY(-50%);
  background: none; border: none; cursor: pointer; padding: 6px 8px;
  color: var(--ink-500); font-size: 1rem; line-height: 1; border-radius: 6px;
}
.password-toggle-btn:hover { color: var(--ink-100); background: var(--navy-700); }
.form-row { display: flex; gap: 14px; }
.form-row > * { flex: 1; }
.mode-choices { display: grid; grid-template-columns: repeat(4, 1fr); gap: 10px; margin-bottom: 16px; }
@media (max-width: 700px) { .mode-choices { grid-template-columns: 1fr 1fr; } }
.mode-choice {
  border: 1px solid var(--navy-600); border-radius: var(--radius-sm); padding: 14px 10px;
  text-align: center; cursor: pointer; background: var(--navy-800); font-weight: 600; font-size: .85rem;
}
.mode-choice input { display: none; }
.mode-choice.selected, .mode-choice:has(input:checked) { border-color: var(--accent); background: rgba(109,91,255,.15); }

/* ---------- Alerts / flashes ---------- */
.alert { padding: 12px 16px; border-radius: var(--radius-sm); margin-bottom: 16px; font-size: .9rem; }
.alert-success { background: rgba(33,230,193,.12); border: 1px solid var(--accent-2); color: var(--accent-2); }
.alert-error   { background: rgba(255,92,122,.12); border: 1px solid var(--accent-danger); color: var(--accent-danger); }
.alert-info    { background: rgba(109,91,255,.12); border: 1px solid var(--accent); color: #cfc7ff; }

/* ---------- Tables ---------- */
table { width: 100%; border-collapse: collapse; font-size: .9rem; }
th, td { text-align: left; padding: 10px 12px; border-bottom: 1px solid var(--navy-700); white-space: nowrap; }
/* Wrap any table in <div class="table-responsive"> so wide tables (leaderboards,
   admin lists) scroll horizontally within their own box on small screens instead
   of stretching the whole page layout beyond the viewport. */
.table-responsive { overflow-x: auto; -webkit-overflow-scrolling: touch; margin: 0 -4px; padding: 0 4px; }
.table-responsive table { min-width: 480px; }
th { color: var(--ink-500); text-transform: uppercase; font-size: .74rem; letter-spacing: .05em; }
tr:hover td { background: rgba(255,255,255,.02); }
.badge { display: inline-block; padding: 3px 10px; border-radius: 999px; font-size: .72rem; font-weight: 700; }
.badge-active { background: rgba(33,230,193,.15); color: var(--accent-2); }
.badge-waiting { background: rgba(255,159,67,.15); color: var(--accent-warn); }
.badge-disabled { background: rgba(255,92,122,.15); color: var(--accent-danger); }

/* ---------- Landing hero ---------- */
.hero { text-align: center; padding: 90px 20px 60px; }
.hero h1 { font-size: 3rem; background: linear-gradient(135deg, #fff, var(--accent-2)); -webkit-background-clip: text; background-clip: text; color: transparent; }
.hero p.tagline { font-size: 1.2rem; color: var(--ink-300); margin-bottom: 30px; }
.hero .cta { display: flex; gap: 14px; justify-content: center; }

/* ---------- Room code display ---------- */
.room-code {
  font-size: 2.6rem; font-weight: 800; letter-spacing: .12em; text-align: center;
  background: var(--navy-700); padding: 18px; border-radius: var(--radius); color: var(--accent-gold);
  margin: 14px 0;
}

/* ---------- Game screen ---------- */
.game-screen { max-width: 720px; margin: 30px auto; padding: 0 20px; user-select: none; -webkit-user-select: none; -moz-user-select: none; -ms-user-select: none; }
.game-screen input, .game-screen textarea { user-select: text; -webkit-user-select: text; }
.game-topbar { display: flex; justify-content: space-between; align-items: center; margin-bottom: 12px; color: var(--ink-500); font-size: .85rem; }
.timer {
  font-size: 2.2rem; font-weight: 800; text-align: center; margin: 10px 0;
  color: var(--accent-2);
}
.timer.warning { color: var(--accent-warn); }
.timer.danger { color: var(--accent-danger); animation: pulse 1s infinite; }
@keyframes pulse { 0%,100% { opacity: 1; } 50% { opacity: .45; } }
.question-box {
  background: linear-gradient(180deg, var(--navy-800), var(--navy-900));
  border: 1px solid var(--navy-700); border-radius: var(--radius);
  padding: 40px 30px; text-align: center; font-size: 1.4rem; font-weight: 600;
  margin-bottom: 20px; min-height: 120px; display: flex; align-items: center; justify-content: center;
  user-select: none; -webkit-user-select: none; -moz-user-select: none; -ms-user-select: none;
}
.answer-row { display: flex; gap: 10px; }
.answer-row input { margin-bottom: 0; }
.scoreboard { display: flex; justify-content: space-between; margin-top: 24px; gap: 14px; flex-wrap: wrap; }
.score-pill { flex: 1; min-width: 140px; background: var(--navy-700); border-radius: var(--radius-sm); padding: 12px; text-align: center; }
.score-pill .pts { font-size: 1.4rem; font-weight: 800; color: var(--accent-2); }
.flash-correct { animation: flashGreen .6s ease; }
.flash-wrong { animation: flashRed .6s ease; }
@keyframes flashGreen { 0% { background: rgba(33,230,193,.3); } 100% { background: transparent; } }
@keyframes flashRed { 0% { background: rgba(255,92,122,.3); } 100% { background: transparent; } }

footer.site-footer { text-align: center; color: var(--ink-500); font-size: .8rem; padding: 40px 0; }
footer.site-footer .footer-links { margin-bottom: 10px; font-size: .82rem; }
footer.site-footer .footer-links a { color: var(--ink-300); margin: 0 6px; }
footer.site-footer .footer-links a:hover { color: var(--ink-100); text-decoration: none; }
footer.site-footer .footer-credit { margin-top: 6px; font-size: .72rem; color: var(--ink-500); opacity: .8; }

.text-muted { color: var(--ink-500); }
.mt-0 { margin-top: 0; } .mb-0 { margin-bottom: 0; }
.flex { display: flex; } .items-center { align-items: center; } .justify-between { justify-content: space-between; }
.gap-2 { gap: 8px; } .gap-3 { gap: 14px; }

/* =========================================================
   COMPACT / MOBILE PASS
   Tightens spacing, type scale, and table density on narrow
   screens so no page content or table stretches beyond the
   viewport width on a phone.
   ========================================================= */
@media (max-width: 600px) {
  html { -webkit-text-size-adjust: 100%; }
  body { overflow-x: hidden; }

  .container, .container-narrow { padding: 0 14px; }
  .card { padding: 16px; border-radius: 12px; }
  .card + .card { margin-top: 12px; }
  .card-title { font-size: .82rem; margin-bottom: 10px; }

  h1 { font-size: 1.4rem; }
  h2 { font-size: 1.15rem; }
  h3 { font-size: 1rem; }

  .hero { padding: 50px 16px 34px; }
  .hero h1 { font-size: 2rem; }
  .hero p.tagline { font-size: .95rem; margin-bottom: 20px; }
  .hero .cta { flex-direction: column; gap: 10px; }
  .hero .cta .btn { width: 100%; }

  .grid { gap: 10px; }
  .stat-box { padding: 10px; }
  .stat-box .num { font-size: 1.35rem; }
  .stat-box .label { font-size: .64rem; }

  .btn { padding: 10px 16px; font-size: .85rem; }
  .btn-sm { padding: 6px 10px; font-size: .74rem; }

  label { font-size: .78rem; margin-bottom: 4px; }
  input, select, textarea { padding: 9px 10px; margin-bottom: 12px; font-size: .88rem; }
  .form-row { flex-direction: column; gap: 0; }

  /* Tables: smaller type + tighter cells, always inside a scrollable box */
  table { font-size: .74rem; }
  th, td { padding: 6px 8px; }
  .badge { font-size: .64rem; padding: 2px 7px; }

  .room-code { font-size: 1.8rem; padding: 12px; }
  .question-box { padding: 22px 16px; font-size: 1.05rem; min-height: 90px; }
  .timer { font-size: 1.6rem; }
  .game-topbar { font-size: .74rem; }
  .scoreboard { gap: 8px; }
  .score-pill { min-width: 100px; padding: 8px; }
  .score-pill .pts { font-size: 1.1rem; }

  .navbar { padding: 12px 14px; }
  .brand { font-size: 1.05rem; }
  .brand .brand-mark { width: 30px; height: 30px; font-size: .95rem; }

  footer.site-footer { padding: 26px 14px; font-size: .72rem; }
}

/* Never let any element force horizontal scroll on the page itself —
   only .table-responsive boxes are allowed to scroll internally. */
img, svg, video { max-width: 100%; height: auto; }

/* ---------- Chat panel ---------- */
.chat-panel {
  position: fixed; right: 20px; bottom: 20px; z-index: 60;
  width: 300px; max-width: calc(100vw - 40px);
  font-family: inherit;
}
.chat-toggle {
  width: 100%; background: var(--navy-800); border: 1px solid var(--navy-600);
  color: var(--ink-100); padding: 10px 16px; border-radius: 999px; cursor: pointer;
  font-weight: 700; font-size: .88rem; box-shadow: var(--shadow-lg);
  display: flex; align-items: center; justify-content: center; gap: 8px;
}
.chat-badge {
  background: var(--accent-danger); color: #fff; font-size: .68rem; font-weight: 800;
  border-radius: 999px; padding: 1px 7px; min-width: 18px; text-align: center;
}
.chat-body {
  display: flex; flex-direction: column; margin-top: 8px;
  background: var(--navy-900); border: 1px solid var(--navy-700); border-radius: var(--radius);
  box-shadow: var(--shadow-lg); overflow: hidden; height: 340px;
}
.chat-messages { flex: 1; overflow-y: auto; padding: 10px; display: flex; flex-direction: column; gap: 8px; }
.chat-message { display: flex; gap: 8px; align-items: flex-start; }
.chat-avatar { width: 26px; height: 26px; border-radius: 50%; flex-shrink: 0; margin-top: 2px; }
.chat-bubble { background: var(--navy-700); border-radius: 10px; padding: 6px 10px; max-width: 78%; }
.chat-message-mine { flex-direction: row-reverse; }
.chat-message-mine .chat-bubble { background: rgba(109,91,255,.35); }
.chat-meta { font-size: .68rem; color: var(--ink-500); margin-bottom: 2px; }
.chat-meta span { margin-left: 6px; }
.chat-text { font-size: .85rem; color: var(--ink-100); word-break: break-word; }
.chat-input-row { display: flex; gap: 6px; padding: 8px; border-top: 1px solid var(--navy-700); }
.chat-input-row input { margin-bottom: 0; flex: 1; padding: 8px 10px; font-size: .85rem; }
.chat-input-row button { flex-shrink: 0; }

@media (max-width: 600px) {
  .chat-panel { right: 10px; bottom: 10px; width: calc(100vw - 20px); }
  .chat-body { height: 300px; }
}