/* ═══════════════════════════════════════════════════════
   CLASSFLOW — MAIN STYLES
   Layout, Components, Sidebar, Topbar, Views
═══════════════════════════════════════════════════════ */

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

:root {
  --sidebar-w: 220px;
  --topbar-h: 60px;
  --radius: 12px;
  --radius-sm: 8px;
  --radius-lg: 16px;
  --transition: 0.2s cubic-bezier(.4,0,.2,1);
  --shadow: 0 4px 24px rgba(0,0,0,0.18);
  --shadow-lg: 0 8px 40px rgba(0,0,0,0.28);
}

html, body {
  height: 100%;
  font-family: 'DM Sans', sans-serif;
  font-size: 15px;
  line-height: 1.5;
  overflow: hidden;
}

/* ── UTILITIES ── */
.hidden { display: none !important; }
.flex { display: flex; }
.flex-col { flex-direction: column; }
.gap-2 { gap: 8px; }
.gap-3 { gap: 12px; }
.gap-4 { gap: 16px; }
.items-center { align-items: center; }
.justify-between { justify-content: space-between; }

/* ══════════════════════════════════════
   LOADING SCREEN
══════════════════════════════════════ */
.loading-screen {
  position: fixed; inset: 0; z-index: 9999;
  background: var(--bg);
  display: flex; align-items: center; justify-content: center;
  overflow: hidden;
}
.loading-inner {
  position: relative; z-index: 2;
  display: flex; flex-direction: column; align-items: center; gap: 24px;
}
.loading-logo {
  display: flex; flex-direction: column; align-items: center; gap: 12px;
  animation: loadFadeIn 0.6s ease both;
}
.logo-mark {
  width: 72px; height: 72px;
  background: var(--accent-alpha);
  border-radius: 20px;
  display: flex; align-items: center; justify-content: center;
  color: var(--accent);
  position: relative;
  overflow: hidden;
}
.logo-mark::before {
  content: '';
  position: absolute; inset: 0;
  background: linear-gradient(135deg, var(--accent-alpha) 0%, transparent 100%);
  animation: shimmer 2s infinite;
}
.logo-mark.small { width: 52px; height: 52px; border-radius: 14px; }
.logo-mark.micro { width: 36px; height: 36px; border-radius: 10px; flex-shrink: 0; }
.logo-svg { width: 44px; height: 44px; position: relative; z-index: 1; }
.logo-mark.small svg { width: 32px; height: 32px; }
.logo-mark.micro svg { width: 22px; height: 22px; }

.logo-path-1 { animation: drawPath 1.2s ease both; }
.logo-path-2 { animation: drawPath 1.2s 0.2s ease both; }
.logo-dot { animation: popIn 0.4s 1.1s ease both; transform-origin: center; transform: scale(0); }

.logo-text-wrap {
  font-family: 'Syne', sans-serif;
  font-size: 2rem; font-weight: 800; letter-spacing: -0.02em;
  line-height: 1;
}
.logo-text-class { color: var(--text); }
.logo-text-flow { color: var(--accent); }

.sidebar-logo-text .logo-text-wrap,
.sidebar-logo-text { font-family: 'Syne', sans-serif; font-size: 1.1rem; font-weight: 800; letter-spacing: -0.01em; }

.loading-bar-wrap {
  width: 200px;
  animation: loadFadeIn 0.6s 0.4s ease both;
  opacity: 0;
}
.loading-bar {
  height: 3px;
  background: var(--border);
  border-radius: 99px;
  overflow: hidden;
}
.loading-bar-fill {
  height: 100%;
  background: var(--accent);
  border-radius: 99px;
  width: 0%;
  animation: loadBar 2.5s ease forwards;
}
.loading-status {
  color: var(--text-muted);
  font-size: 0.8rem;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  animation: loadFadeIn 0.6s 0.6s ease both;
  opacity: 0;
}

/* Particles */
.loading-particles {
  position: absolute; inset: 0; pointer-events: none;
}
.particle {
  position: absolute;
  width: 4px; height: 4px;
  border-radius: 50%;
  background: var(--accent);
  opacity: 0;
  animation: floatParticle var(--dur, 4s) var(--delay, 0s) ease-in-out infinite;
}

/* ══════════════════════════════════════
   AUTH SCREEN
══════════════════════════════════════ */
.auth-screen {
  position: fixed; inset: 0; z-index: 100;
  display: flex; align-items: center; justify-content: center;
  background: var(--bg);
  overflow: hidden;
}
.auth-bg-anim {
  position: absolute; inset: 0; overflow: hidden;
}
.auth-wave {
  position: absolute;
  border-radius: 50%;
  opacity: 0.06;
  background: var(--accent);
  animation: pulseWave 8s ease-in-out infinite;
}
.auth-wave.w1 { width: 600px; height: 600px; top: -200px; right: -200px; animation-delay: 0s; }
.auth-wave.w2 { width: 400px; height: 400px; bottom: -150px; left: -100px; animation-delay: -3s; }
.auth-wave.w3 { width: 300px; height: 300px; top: 50%; left: 50%; transform: translate(-50%,-50%); animation-delay: -5s; }

.auth-card {
  position: relative; z-index: 2;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 40px 36px;
  width: 100%; max-width: 420px;
  box-shadow: var(--shadow-lg);
  animation: authCardIn 0.5s cubic-bezier(.34,1.56,.64,1) both;
}
.auth-logo {
  display: flex; align-items: center; gap: 12px; margin-bottom: 28px;
}
.auth-tabs {
  display: flex; gap: 4px;
  background: var(--surface-alt);
  border-radius: var(--radius-sm);
  padding: 4px;
  margin-bottom: 24px;
}
.auth-tab {
  flex: 1; padding: 8px;
  border: none; background: transparent; cursor: pointer;
  color: var(--text-muted);
  font-family: 'DM Sans', sans-serif;
  font-size: 0.9rem; font-weight: 500;
  border-radius: 6px;
  transition: var(--transition);
}
.auth-tab.active {
  background: var(--accent);
  color: var(--accent-text);
  font-weight: 600;
}
.auth-form { display: none; flex-direction: column; gap: 16px; }
.auth-form.active { display: flex; }
.form-group { display: flex; flex-direction: column; gap: 6px; }
.form-group label {
  font-size: 0.8rem; font-weight: 600;
  letter-spacing: 0.04em; text-transform: uppercase;
  color: var(--text-muted);
}
.form-group input {
  background: var(--input-bg);
  border: 1.5px solid var(--border);
  border-radius: var(--radius-sm);
  color: var(--text);
  font-family: 'DM Sans', sans-serif;
  font-size: 0.95rem;
  padding: 10px 14px;
  transition: border-color var(--transition);
  outline: none;
}
.form-group input:focus { border-color: var(--accent); }
.btn-auth {
  display: flex; align-items: center; justify-content: center; gap: 8px;
  background: var(--accent); color: var(--accent-text);
  border: none; border-radius: var(--radius-sm);
  font-family: 'Syne', sans-serif;
  font-size: 0.95rem; font-weight: 700;
  padding: 12px;
  cursor: pointer;
  transition: var(--transition);
  margin-top: 4px;
}
.btn-auth:hover { filter: brightness(1.1); transform: translateY(-1px); }
.btn-auth:active { transform: translateY(0); }
.auth-error {
  color: #ff6b6b; font-size: 0.85rem; text-align: center;
  background: rgba(255,107,107,0.1); border-radius: 6px;
  padding: 8px 12px;
}
.controller-join-entry {
  margin-top: 18px;
  padding-top: 18px;
  border-top: 1px solid var(--border);
  display: grid;
  gap: 10px;
}
.controller-join-entry p {
  font-size: 0.82rem;
  color: var(--text-muted);
  text-align: center;
}

/* ══════════════════════════════════════
   APP SHELL
══════════════════════════════════════ */
.app {
  display: flex;
  height: 100vh;
  overflow: hidden;
  background: var(--bg);
  color: var(--text);
}

/* ── SIDEBAR ── */
.sidebar {
  width: var(--sidebar-w);
  min-width: var(--sidebar-w);
  height: 100%;
  background: var(--sidebar-bg);
  border-right: 1px solid var(--border);
  display: flex; flex-direction: column;
  transition: width var(--transition), min-width var(--transition), transform var(--transition);
  overflow: hidden;
  z-index: 50;
  position: relative;
}
.sidebar.collapsed {
  width: 64px; min-width: 64px;
}
.sidebar.collapsed .sidebar-logo-text,
.sidebar.collapsed .nav-item span { opacity: 0; pointer-events: none; }

.sidebar-logo {
  height: var(--topbar-h);
  display: flex; align-items: center; gap: 10px;
  padding: 0 14px;
  border-bottom: 1px solid var(--border);
  flex-shrink: 0;
}
.sidebar-logo-text {
  white-space: nowrap;
  transition: opacity var(--transition);
}

.sidebar-nav {
  flex: 1;
  padding: 12px 8px;
  display: flex; flex-direction: column; gap: 2px;
  overflow-y: auto; overflow-x: hidden;
}
.sidebar-nav::-webkit-scrollbar { width: 4px; }
.sidebar-nav::-webkit-scrollbar-thumb { background: var(--border); border-radius: 99px; }

.nav-item {
  display: flex; align-items: center; gap: 10px;
  padding: 9px 10px;
  border-radius: var(--radius-sm);
  color: var(--text-muted);
  text-decoration: none;
  font-size: 0.88rem; font-weight: 500;
  cursor: pointer;
  border: none; background: transparent;
  transition: background var(--transition), color var(--transition);
  white-space: nowrap; width: 100%;
  position: relative;
}
.nav-item span { transition: opacity var(--transition); }
.nav-item svg { flex-shrink: 0; }
.nav-item:hover {
  background: var(--surface-alt);
  color: var(--text);
}
.nav-item.active {
  background: var(--accent-alpha);
  color: var(--accent);
  font-weight: 600;
}
.nav-item.logout:hover { color: #ff6b6b; background: rgba(255,107,107,0.08); }

.sidebar-bottom {
  padding: 8px;
  border-top: 1px solid var(--border);
  display: flex; flex-direction: column; gap: 2px;
}

/* ── MAIN WRAP ── */
.main-wrap {
  flex: 1; min-width: 0;
  display: flex; flex-direction: column;
  height: 100%;
  overflow: hidden;
}

/* ── TOPBAR ── */
.topbar {
  height: var(--topbar-h);
  background: var(--surface);
  border-bottom: 1px solid var(--border);
  display: flex; align-items: center; justify-content: space-between;
  padding: 0 20px;
  gap: 16px;
  flex-shrink: 0;
  z-index: 40;
}
.topbar-left { display: flex; align-items: center; gap: 12px; }
.topbar-right { display: flex; align-items: center; gap: 10px; }

.sidebar-toggle {
  background: transparent; border: none;
  color: var(--text-muted); cursor: pointer;
  padding: 6px; border-radius: 8px;
  display: flex; align-items: center;
  transition: var(--transition);
}
.sidebar-toggle:hover { background: var(--surface-alt); color: var(--text); }

.class-selector-wrap { display: flex; align-items: center; gap: 6px; }
.class-selector {
  background: var(--surface-alt);
  border: 1px solid var(--border);
  color: var(--text);
  border-radius: var(--radius-sm);
  font-family: 'DM Sans', sans-serif;
  font-size: 0.88rem; font-weight: 500;
  padding: 6px 10px; cursor: pointer;
  outline: none;
  transition: border-color var(--transition);
  max-width: 180px;
}
.class-selector:focus { border-color: var(--accent); }

.btn-icon {
  width: 32px; height: 32px;
  background: var(--surface-alt);
  border: 1px solid var(--border);
  border-radius: 8px;
  color: var(--text-muted);
  cursor: pointer;
  display: flex; align-items: center; justify-content: center;
  transition: var(--transition);
  flex-shrink: 0;
}
.btn-icon:hover { background: var(--accent-alpha); color: var(--accent); border-color: var(--accent); }

.controller-status {
  display: flex; align-items: center; gap: 6px;
  padding: 5px 10px;
  border-radius: 99px;
  background: var(--surface-alt);
  border: 1px solid var(--border);
  font-size: 0.78rem; font-weight: 500;
  color: var(--text-muted);
  cursor: default;
}
.status-dot {
  width: 7px; height: 7px; border-radius: 50%;
  background: var(--text-muted);
  flex-shrink: 0;
}
.status-dot.online {
  background: #4ade80;
  box-shadow: 0 0 0 3px rgba(74,222,128,0.2);
  animation: pulse 2s infinite;
}

.theme-picker-wrap { position: relative; }
.theme-dropdown {
  position: absolute; top: calc(100% + 8px); right: 0;
  width: 280px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow-lg);
  padding: 12px;
  z-index: 200;
  max-height: 340px;
  overflow-y: auto;
}
.theme-dropdown h4 {
  font-family: 'Syne', sans-serif;
  font-size: 0.78rem; text-transform: uppercase;
  letter-spacing: 0.06em; color: var(--text-muted);
  margin-bottom: 10px;
}
.theme-grid {
  display: grid; grid-template-columns: repeat(2, 1fr); gap: 6px;
}
.theme-option {
  display: flex; align-items: center; gap: 8px;
  padding: 7px 9px;
  border-radius: 8px;
  border: 1.5px solid transparent;
  cursor: pointer;
  transition: var(--transition);
  background: var(--surface-alt);
  font-size: 0.82rem; font-weight: 500;
  color: var(--text-muted);
}
.theme-option:hover { border-color: var(--accent); color: var(--text); }
.theme-option.active { border-color: var(--accent); color: var(--accent); }
.theme-swatch {
  width: 16px; height: 16px; border-radius: 4px; flex-shrink: 0;
}

.user-chip {
  display: flex; align-items: center; gap: 8px;
  padding: 4px 10px 4px 4px;
  background: var(--surface-alt);
  border: 1px solid var(--border);
  border-radius: 99px;
  cursor: default;
}
#user-initial {
  width: 28px; height: 28px;
  background: var(--accent);
  color: var(--accent-text);
  border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  font-family: 'Syne', sans-serif;
  font-size: 0.85rem; font-weight: 700;
  flex-shrink: 0;
}
#user-name-display { font-size: 0.83rem; font-weight: 500; max-width: 120px; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }

/* ── VIEW CONTAINER ── */
.view-container {
  flex: 1; overflow-y: auto; overflow-x: hidden;
  padding: 28px;
  background: var(--bg);
  scroll-behavior: smooth;
}
.view-container::-webkit-scrollbar { width: 6px; }
.view-container::-webkit-scrollbar-thumb { background: var(--border); border-radius: 99px; }

/* ══════════════════════════════════════
   VIEWS — SHARED
══════════════════════════════════════ */
.view { animation: viewIn 0.3s ease both; }
.view-header {
  margin-bottom: 24px;
  display: flex; align-items: flex-start; justify-content: space-between; flex-wrap: wrap; gap: 12px;
}
.view-title {
  font-family: 'Syne', sans-serif;
  font-size: 1.6rem; font-weight: 800;
  color: var(--text);
  letter-spacing: -0.02em;
  line-height: 1.1;
}
.view-subtitle { font-size: 0.85rem; color: var(--text-muted); margin-top: 2px; }

.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 20px;
}
.card-title {
  font-family: 'Syne', sans-serif;
  font-size: 0.85rem; font-weight: 700;
  text-transform: uppercase; letter-spacing: 0.06em;
  color: var(--text-muted);
  margin-bottom: 16px;
}
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 6px;
  padding: 9px 18px;
  border-radius: var(--radius-sm);
  font-family: 'DM Sans', sans-serif;
  font-size: 0.88rem; font-weight: 600;
  cursor: pointer; border: none;
  transition: var(--transition);
}
.btn .cf-icon + span,
.icon-button .cf-icon + span { display: inline-flex; }
.btn-primary {
  background: var(--accent); color: var(--accent-text);
}
.btn-primary:hover { filter: brightness(1.1); transform: translateY(-1px); }
.btn-secondary {
  background: var(--surface-alt); color: var(--text);
  border: 1px solid var(--border);
}
.btn-secondary:hover { background: var(--border); }
.btn-danger {
  background: rgba(255,107,107,0.12); color: #ff6b6b;
  border: 1px solid rgba(255,107,107,0.2);
}
.btn-danger:hover { background: rgba(255,107,107,0.22); }
.btn-sm { padding: 6px 12px; font-size: 0.82rem; }
.btn-lg { padding: 13px 28px; font-size: 1rem; }
.btn-icon-round {
  width: 40px; height: 40px;
  border-radius: 50%; background: var(--surface-alt);
  border: 1px solid var(--border);
  color: var(--text); cursor: pointer;
  display: flex; align-items: center; justify-content: center;
  transition: var(--transition);
}
.btn-icon-round:hover { background: var(--accent-alpha); color: var(--accent); }

.cf-icon {
  width: 1em;
  height: 1em;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}
.cf-icon svg {
  width: 100%;
  height: 100%;
  display: block;
  stroke: currentColor;
  fill: none;
  stroke-width: 2;
  stroke-linecap: round;
  stroke-linejoin: round;
}
.icon-button {
  width: 28px;
  height: 28px;
  border: none;
  border-radius: 8px;
  background: transparent;
  color: var(--text-muted);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: var(--transition);
}
.icon-button:hover {
  color: var(--text);
  background: var(--surface);
}

/* ══════════════════════════════════════
   DASHBOARD VIEW
══════════════════════════════════════ */
.dashboard-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
  gap: 14px;
}
.tool-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 22px 18px;
  cursor: pointer;
  transition: var(--transition);
  display: flex; flex-direction: column; gap: 12px;
  position: relative; overflow: hidden;
}
.tool-card::before {
  content: '';
  position: absolute; inset: 0;
  background: var(--accent);
  opacity: 0;
  transition: opacity var(--transition);
}
.tool-card:hover { transform: translateY(-3px); border-color: var(--accent); box-shadow: 0 8px 32px rgba(0,0,0,0.15); }
.tool-card:hover::before { opacity: 0.04; }
.tool-card-icon {
  width: 44px; height: 44px;
  background: var(--accent-alpha);
  border-radius: 12px;
  display: flex; align-items: center; justify-content: center;
  color: var(--accent);
}
.tool-card-name {
  font-family: 'Syne', sans-serif;
  font-size: 1rem; font-weight: 700;
  color: var(--text);
}
.tool-card-desc { font-size: 0.8rem; color: var(--text-muted); line-height: 1.4; }

/* ══════════════════════════════════════
   TIMER VIEW
══════════════════════════════════════ */
.timer-display {
  text-align: center;
  padding: 48px 24px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
}
.timer-digit-editor {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  flex-wrap: wrap;
  justify-content: center;
}
.timer-digit-stack {
  display: grid;
  gap: 8px;
  justify-items: center;
}
.timer-digit-step {
  width: 42px;
  height: 30px;
  border: 1px solid var(--border);
  border-radius: 10px;
  background: var(--surface-alt);
  color: var(--text);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: var(--transition);
}
.timer-digit-step:hover {
  border-color: var(--accent);
  color: var(--accent);
}
.timer-digit-input {
  width: 70px;
  border: none;
  background: transparent;
  color: var(--text);
  text-align: center;
  font-family: 'Syne', sans-serif;
  font-size: 5rem;
  font-weight: 800;
  letter-spacing: -0.04em;
  line-height: 1;
}
.timer-digit-input:focus {
  outline: 2px solid var(--accent);
  border-radius: 16px;
}
.timer-colon {
  font-family: 'Syne', sans-serif;
  font-size: 5rem;
  font-weight: 800;
  color: var(--text-muted);
  padding: 0 2px;
}
.timer-digits {
  font-family: 'Syne', sans-serif;
  font-size: 7rem; font-weight: 800;
  color: var(--text);
  letter-spacing: -0.04em;
  line-height: 1;
  transition: color 0.3s;
  font-variant-numeric: tabular-nums;
}
.timer-digits.warning { color: #f59e0b; }
.timer-digits.urgent { color: #ef4444; animation: urgentFlash 0.5s infinite; }
.timer-digits.done { color: var(--accent); animation: timerDone 0.5s ease; }

.timer-presets { display: flex; gap: 8px; flex-wrap: wrap; justify-content: center; }
.preset-btn {
  padding: 7px 14px; border: 1.5px solid var(--border);
  border-radius: 99px; background: var(--surface-alt);
  color: var(--text-muted); font-size: 0.82rem; font-weight: 600;
  cursor: pointer; transition: var(--transition);
}
.preset-btn:hover { border-color: var(--accent); color: var(--accent); }

.timer-controls { display: flex; gap: 12px; justify-content: center; align-items: center; flex-wrap: wrap; }
.timer-main-btn {
  width: 72px; height: 72px; border-radius: 50%;
  background: var(--accent); color: var(--accent-text);
  border: none; cursor: pointer;
  display: flex; align-items: center; justify-content: center;
  font-size: 1.6rem;
  transition: var(--transition);
  box-shadow: 0 4px 20px var(--accent-glow);
}
.timer-main-btn:hover { transform: scale(1.08); }
.timer-main-btn:active { transform: scale(0.96); }

.grade-mode-tabs {
  display: inline-flex;
  gap: 6px;
  margin-bottom: 18px;
  padding: 4px;
  border-radius: 999px;
  background: var(--surface-alt);
  border: 1px solid var(--border);
}
.grade-mode-tab {
  border: none;
  background: transparent;
  color: var(--text-muted);
  padding: 8px 14px;
  border-radius: 999px;
  cursor: pointer;
  font-weight: 600;
}
.grade-mode-tab.active {
  background: var(--accent);
  color: var(--accent-text);
}
.grade-table-wrap {
  overflow: auto;
}
.grade-table {
  width: 100%;
  border-collapse: collapse;
}
.grade-table th,
.grade-table td {
  padding: 10px 12px;
  border-bottom: 1px solid var(--border);
  text-align: left;
}
.grade-table th {
  color: var(--text-muted);
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
}

/* ══════════════════════════════════════
   WHEEL VIEW
══════════════════════════════════════ */
.wheel-layout {
  display: grid;
  grid-template-columns: 1fr 280px;
  gap: 20px;
  align-items: start;
}
.wheel-canvas-wrap {
  display: flex; flex-direction: column; align-items: center; gap: 20px;
}
.wheel-container {
  position: relative;
  width: 320px; height: 320px;
}
.wheel-canvas { border-radius: 50%; }
.wheel-pointer {
  position: absolute;
  top: -16px; left: 50%; transform: translateX(-50%);
  width: 0; height: 0;
  border-left: 14px solid transparent;
  border-right: 14px solid transparent;
  border-top: 28px solid var(--accent);
  filter: drop-shadow(0 2px 4px rgba(0,0,0,0.3));
  z-index: 10;
}
.wheel-result {
  font-family: 'Syne', sans-serif;
  font-size: 1.4rem; font-weight: 800;
  color: var(--accent);
  text-align: center;
  min-height: 40px;
  animation: popIn 0.4s cubic-bezier(.34,1.56,.64,1) both;
}

/* ══════════════════════════════════════
   SCOREBOARD VIEW
══════════════════════════════════════ */
.scoreboard-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(180px, 1fr));
  gap: 12px;
}
.score-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 18px;
  text-align: center;
  position: relative;
  transition: var(--transition);
}
.score-card:hover { border-color: var(--accent); }
.score-name {
  font-family: 'Syne', sans-serif;
  font-size: 0.95rem; font-weight: 700;
  color: var(--text); margin-bottom: 8px;
  overflow: hidden; text-overflow: ellipsis; white-space: nowrap;
}
.score-value {
  font-family: 'Syne', sans-serif;
  font-size: 2.5rem; font-weight: 800;
  color: var(--accent); line-height: 1;
  margin-bottom: 12px;
  transition: all 0.2s cubic-bezier(.34,1.56,.64,1);
}
.score-value.bump { animation: scoreBump 0.3s cubic-bezier(.34,1.56,.64,1); }
.score-btns { display: flex; gap: 6px; justify-content: center; }
.score-btn {
  width: 32px; height: 32px;
  border-radius: 50%; border: 1.5px solid var(--border);
  background: var(--surface-alt); color: var(--text);
  cursor: pointer; font-size: 1.1rem; font-weight: 700;
  transition: var(--transition);
  display: flex; align-items: center; justify-content: center;
}
.score-btn.plus:hover { background: #4ade80; border-color: #4ade80; color: white; }
.score-btn.minus:hover { background: #f87171; border-color: #f87171; color: white; }
.score-delete {
  position: absolute; top: 6px; right: 6px;
  width: 22px; height: 22px; border-radius: 50%;
  border: none; background: transparent; color: var(--text-muted);
  cursor: pointer; font-size: 0.9rem; opacity: 0;
  transition: var(--transition);
  display: flex; align-items: center; justify-content: center;
}
.score-card:hover .score-delete { opacity: 1; }
.score-delete:hover { background: rgba(255,107,107,0.2); color: #ff6b6b; }

/* ══════════════════════════════════════
   GRADE CALCULATOR
══════════════════════════════════════ */
.grade-result-big {
  font-family: 'Syne', sans-serif;
  font-size: 5rem; font-weight: 800;
  color: var(--accent);
  line-height: 1;
  text-align: center;
  transition: color 0.3s;
}
.grade-letter {
  font-family: 'Syne', sans-serif;
  font-size: 2.5rem; font-weight: 800;
  text-align: center; margin-top: 8px;
}

/* ══════════════════════════════════════
   QR VIEW
══════════════════════════════════════ */
.qr-display {
  display: flex; flex-direction: column; align-items: center; gap: 20px;
  padding: 32px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
}
#qr-canvas {
  border-radius: 12px;
  image-rendering: pixelated;
}

/* ══════════════════════════════════════
   LINKS VIEW
══════════════════════════════════════ */
.links-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: 10px;
}
.link-card {
  display: flex; align-items: center; gap: 12px;
  padding: 12px 14px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  transition: var(--transition);
  cursor: pointer;
  text-decoration: none;
}
.link-card:hover { border-color: var(--accent); transform: translateX(3px); }
.link-favicon {
  width: 32px; height: 32px; border-radius: 8px;
  background: var(--accent-alpha); color: var(--accent);
  display: flex; align-items: center; justify-content: center;
  flex-shrink: 0; font-size: 0.75rem;
}
.link-name { font-weight: 600; font-size: 0.88rem; color: var(--text); }
.link-url { font-size: 0.75rem; color: var(--text-muted); overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.link-delete {
  margin-left: auto; flex-shrink: 0;
  opacity: 0; transition: var(--transition);
  width: 26px; height: 26px; border-radius: 6px;
  border: none; background: transparent; color: var(--text-muted);
  cursor: pointer; display: flex; align-items: center; justify-content: center;
}
.link-card:hover .link-delete { opacity: 1; }
.link-delete:hover { background: rgba(255,107,107,0.15); color: #ff6b6b; }

.notes-textarea {
  min-height: 360px;
  font-size: 0.96rem;
  line-height: 1.7;
}
.notes-toolbar {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  align-items: center;
  flex-wrap: wrap;
}

.draw-layout {
  display: grid;
  grid-template-columns: 300px minmax(0, 1fr);
  gap: 18px;
  align-items: start;
}
.draw-panel {
  position: sticky;
  top: 0;
}
.draw-tool-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 8px;
}
.draw-tool-btn {
  border: 1px solid var(--border);
  background: var(--surface-alt);
  color: var(--text);
  border-radius: 12px;
  padding: 10px 12px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  cursor: pointer;
  transition: var(--transition);
}
.draw-tool-btn.active,
.draw-tool-btn:hover {
  border-color: var(--accent);
  color: var(--accent);
}
.draw-swatches {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}
.draw-swatch {
  width: 28px;
  height: 28px;
  border-radius: 50%;
  border: 2px solid rgba(255,255,255,0.35);
  cursor: pointer;
}
.draw-swatch.active {
  box-shadow: 0 0 0 2px var(--accent);
}
.draw-check {
  display: flex;
  align-items: center;
  gap: 8px;
  color: var(--text-muted);
  font-size: 0.86rem;
  margin-bottom: 6px;
}
.draw-stage {
  overflow: auto;
  padding: 14px;
}
#draw-canvas {
  width: 100%;
  min-height: 560px;
  background: #fff;
  border-radius: 16px;
  display: block;
  box-shadow: inset 0 0 0 1px rgba(15,23,42,0.08);
  touch-action: none;
}

/* ══════════════════════════════════════
   CONTROLLER VIEW
══════════════════════════════════════ */
.controller-code-display {
  font-family: 'Syne', sans-serif;
  font-size: 3rem; font-weight: 800;
  letter-spacing: 0.2em;
  color: var(--accent);
  text-align: center;
  padding: 24px;
  background: var(--surface);
  border: 2px dashed var(--accent);
  border-radius: var(--radius-lg);
  margin: 16px 0;
}

/* ══════════════════════════════════════
   OVERLAY MESSAGE
══════════════════════════════════════ */
.overlay-message {
  position: fixed; inset: 0; z-index: 1000;
  background: rgba(0,0,0,0.85);
  display: flex; align-items: center; justify-content: center;
  padding: 40px;
}
.overlay-message-inner {
  background: var(--surface);
  border: 2px solid var(--accent);
  border-radius: var(--radius-lg);
  padding: 48px 56px;
  max-width: 700px;
  text-align: center;
  position: relative;
  animation: popIn 0.4s cubic-bezier(.34,1.56,.64,1);
}
.overlay-message-inner p {
  font-family: 'Syne', sans-serif;
  font-size: 2.5rem; font-weight: 800;
  color: var(--text); line-height: 1.2;
}
.overlay-message-inner button {
  position: absolute; top: 12px; right: 16px;
  background: transparent; border: none; color: var(--text-muted);
  font-size: 1.2rem; cursor: pointer;
}

/* ══════════════════════════════════════
   MODAL
══════════════════════════════════════ */
.modal-backdrop {
  position: fixed; inset: 0; z-index: 500;
  background: rgba(0,0,0,0.6);
  display: flex; align-items: center; justify-content: center;
  padding: 20px;
  backdrop-filter: blur(4px);
}
.modal-backdrop.tour-mode {
  background: transparent;
  backdrop-filter: none;
  pointer-events: none;
}
.modal-backdrop.tour-mode .modal {
  pointer-events: auto;
  box-shadow: 0 12px 36px rgba(0,0,0,0.35);
}
.modal {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  width: 100%; max-width: 480px;
  box-shadow: var(--shadow-lg);
  animation: popIn 0.3s cubic-bezier(.34,1.56,.64,1);
}
.modal-header {
  display: flex; align-items: center; justify-content: space-between;
  padding: 18px 22px;
  border-bottom: 1px solid var(--border);
}
.modal-header h3 {
  font-family: 'Syne', sans-serif;
  font-size: 1.05rem; font-weight: 800;
  color: var(--text);
}
.modal-close {
  background: transparent; border: none; color: var(--text-muted);
  font-size: 1.1rem; cursor: pointer; padding: 4px 8px;
  border-radius: 6px; transition: var(--transition);
}
.modal-close:hover { background: var(--surface-alt); }
.modal-body {
  padding: 22px;
  display: flex; flex-direction: column; gap: 14px;
}
.modal-copy {
  color: var(--text);
  font-size: 0.92rem;
  line-height: 1.55;
}
.modal-actions {
  display: flex;
  justify-content: flex-end;
  gap: 10px;
  flex-wrap: wrap;
}
.modal-error {
  color: #f87171;
  background: rgba(248,113,113,0.12);
  border: 1px solid rgba(248,113,113,0.18);
  border-radius: 10px;
  padding: 10px 12px;
  font-size: 0.82rem;
}
.tour-points {
  display: grid;
  gap: 10px;
}
.tour-point {
  display: grid;
  gap: 4px;
  padding: 12px 14px;
  border-radius: 12px;
  background: var(--surface-alt);
  border: 1px solid var(--border);
}
.tour-point strong {
  font-family: 'Syne', sans-serif;
  font-size: 0.92rem;
}
.tour-point span {
  color: var(--text-muted);
  font-size: 0.83rem;
}
.tour-highlight {
  position: relative;
  z-index: 550;
  box-shadow: 0 0 0 2px var(--accent), 0 0 0 10px rgba(108,138,255,0.12);
  border-radius: 16px;
}

/* ══════════════════════════════════════
   TOAST
══════════════════════════════════════ */
.toast-container {
  position: fixed; bottom: 24px; right: 24px; z-index: 9000;
  display: flex; flex-direction: column; gap: 8px;
}
.toast {
  padding: 12px 18px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  box-shadow: var(--shadow);
  font-size: 0.88rem;
  color: var(--text);
  display: flex; align-items: center; gap: 10px;
  animation: toastIn 0.3s ease both;
  max-width: 320px;
}
.toast.success { border-left: 3px solid #4ade80; }
.toast.error { border-left: 3px solid #f87171; }
.toast.info { border-left: 3px solid var(--accent); }
.toast.fade-out { animation: toastOut 0.3s ease both; }

/* ══════════════════════════════════════
   FORM ELEMENTS (shared)
══════════════════════════════════════ */
input[type="text"], input[type="email"], input[type="password"],
input[type="number"], input[type="url"], textarea, select.styled {
  background: var(--input-bg);
  border: 1.5px solid var(--border);
  border-radius: var(--radius-sm);
  color: var(--text);
  font-family: 'DM Sans', sans-serif;
  font-size: 0.9rem;
  padding: 9px 13px;
  width: 100%; outline: none;
  transition: border-color var(--transition);
}
input:focus, textarea:focus { border-color: var(--accent); }
textarea { resize: vertical; min-height: 80px; }
label.field-label {
  font-size: 0.78rem; text-transform: uppercase;
  letter-spacing: 0.05em; font-weight: 600;
  color: var(--text-muted); margin-bottom: 5px;
  display: block;
}

/* ══════════════════════════════════════
   FULLSCREEN MODE
══════════════════════════════════════ */
.fullscreen-overlay {
  position: fixed; inset: 0; z-index: 800;
  background: var(--bg);
  display: flex; flex-direction: column; align-items: center; justify-content: center;
  gap: 24px;
}
.fullscreen-exit {
  position: absolute; top: 20px; right: 20px;
}
.studio-overlay {
  overflow: hidden;
}
.studio-hud {
  position: absolute;
  inset: 0;
  pointer-events: none;
  z-index: 2;
  transition: opacity .25s ease;
}
.studio-hud .fullscreen-exit {
  pointer-events: auto;
}
.studio-topbar {
  position: absolute;
  top: 20px;
  left: 20px;
  right: 20px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.studio-badge {
  padding: 8px 12px;
  border-radius: 999px;
  background: rgba(17,17,17,0.65);
  border: 1px solid rgba(255,255,255,0.12);
  color: #fff;
  font-size: 0.8rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  backdrop-filter: blur(10px);
}
.studio-frame {
  position: absolute;
  inset: 9vh 8vw;
  border: 1px solid rgba(255,255,255,0.14);
  border-radius: 28px;
}
.studio-corner {
  position: absolute;
  width: 46px;
  height: 46px;
  border-color: rgba(255,255,255,0.82);
  border-style: solid;
}
.studio-corner.top-left { top: 20px; left: 20px; border-width: 3px 0 0 3px; border-top-left-radius: 18px; }
.studio-corner.top-right { top: 20px; right: 20px; border-width: 3px 3px 0 0; border-top-right-radius: 18px; }
.studio-corner.bottom-left { bottom: 20px; left: 20px; border-width: 0 0 3px 3px; border-bottom-left-radius: 18px; }
.studio-corner.bottom-right { bottom: 20px; right: 20px; border-width: 0 3px 3px 0; border-bottom-right-radius: 18px; }
.studio-center-line {
  position: absolute;
  top: 50%;
  left: 50%;
  width: min(55vw, 720px);
  max-width: calc(100% - 120px);
  border-top: 1px dashed rgba(255,255,255,0.22);
  transform: translate(-50%, -50%);
}
.studio-overlay.studio-idle .studio-hud {
  opacity: 0;
}

.public-controller-root {
  min-height: 100vh;
  padding: 32px;
  background:
    radial-gradient(circle at top, rgba(108,138,255,0.16), transparent 38%),
    linear-gradient(180deg, #10131d 0%, #0b0e14 100%);
  color: #f7f8fc;
}
.public-controller-shell {
  max-width: 960px;
  margin: 0 auto;
}
.public-controller-header {
  margin-bottom: 22px;
}
.public-controller-kicker {
  text-transform: uppercase;
  letter-spacing: 0.12em;
  font-size: 0.74rem;
  color: rgba(247,248,252,0.72);
  margin-bottom: 6px;
}
.public-controller-header h1 {
  font-family: 'Syne', sans-serif;
  font-size: clamp(2rem, 4vw, 3.5rem);
  line-height: 1;
  margin-bottom: 8px;
}
.public-controller-header p {
  color: rgba(247,248,252,0.76);
}
.public-controller-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 18px;
}
.public-controller-grid .card {
  background: rgba(15,19,30,0.72);
  border-color: rgba(255,255,255,0.08);
  backdrop-filter: blur(16px);
}
.public-controller-actions {
  display: grid;
  gap: 10px;
}
.public-controller-note {
  color: rgba(247,248,252,0.62);
  font-size: 0.82rem;
  margin-top: 12px;
}

/* ══════════════════════════════════════
   GROUPS VIEW
══════════════════════════════════════ */
.groups-result {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
  gap: 12px;
  margin-top: 16px;
}
.group-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 14px 16px;
}
.group-card-title {
  font-family: 'Syne', sans-serif;
  font-size: 0.8rem; font-weight: 800;
  text-transform: uppercase; letter-spacing: 0.06em;
  color: var(--accent); margin-bottom: 10px;
}
.group-member {
  padding: 4px 0;
  font-size: 0.88rem; color: var(--text);
  border-bottom: 1px solid var(--border);
}
.group-member:last-child { border-bottom: none; }

/* ══════════════════════════════════════
   SETTINGS VIEW
══════════════════════════════════════ */
.settings-section {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 22px;
  margin-bottom: 16px;
}
.settings-section h3 {
  font-family: 'Syne', sans-serif;
  font-size: 0.85rem; font-weight: 800;
  text-transform: uppercase; letter-spacing: 0.06em;
  color: var(--text-muted); margin-bottom: 16px;
}
.settings-row {
  display: flex; align-items: center; justify-content: space-between;
  padding: 10px 0;
  border-bottom: 1px solid var(--border);
  gap: 16px;
}
.settings-row:last-child { border-bottom: none; }
.settings-row-label { font-size: 0.9rem; font-weight: 500; color: var(--text); }
.settings-row-desc { font-size: 0.78rem; color: var(--text-muted); }
.update-log-list {
  display: grid;
  gap: 10px;
}
.update-log-item {
  display: grid;
  gap: 4px;
  padding: 12px 14px;
  background: var(--surface-alt);
  border: 1px solid var(--border);
  border-radius: 12px;
}
.update-log-item strong {
  font-family: 'Syne', sans-serif;
  font-size: 0.9rem;
}
.update-log-item span {
  color: var(--text-muted);
  font-size: 0.82rem;
}

/* ══════════════════════════════════════
   RESPONSIVE
══════════════════════════════════════ */
@media (max-width: 768px) {
  .sidebar {
    position: absolute;
    transform: translateX(-100%);
    height: 100%;
    z-index: 60;
  }
  .sidebar.mobile-open {
    transform: translateX(0);
  }
  .modal-actions {
    justify-content: stretch;
  }
  .modal-actions .btn {
    width: 100%;
  }
  .studio-frame {
    inset: 13vh 6vw;
  }
  .public-controller-root {
    padding: 20px;
  }
  .sidebar.collapsed { transform: translateX(-100%); }
  .view-container { padding: 16px; }
  .dashboard-grid { grid-template-columns: repeat(2, 1fr); }
  .wheel-layout { grid-template-columns: 1fr; }
  .draw-layout { grid-template-columns: 1fr; }
  .timer-digits { font-size: 4.5rem; }
  .timer-digit-input,
  .timer-colon { font-size: 3.2rem; width: 52px; }
  .topbar { padding: 0 12px; }
  #user-name-display { display: none; }
}

/* ══════════════════════════════════════
   CLASSES PANEL (no class selected state)
══════════════════════════════════════ */
.no-class-state {
  display: flex; flex-direction: column; align-items: center; justify-content: center;
  height: 60%;
  gap: 16px; text-align: center;
  color: var(--text-muted);
}
.no-class-state svg { opacity: 0.3; }
.no-class-state h2 {
  font-family: 'Syne', sans-serif;
  font-size: 1.2rem; font-weight: 700; color: var(--text);
}
.no-class-state p { font-size: 0.88rem; max-width: 300px; }

/* Camera */
#camera-feed {
  width: 100%; max-width: 640px;
  border-radius: var(--radius);
  background: #000;
}