/* ============================================================
   Учительская панель — визуальное сопровождение урока
   Dark neo-brutalist theme
   ============================================================ */

/* ----- Reset & Tokens ----- */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

:root {
  --bg: #0b1222;
  --panel: #111b31;
  --panel-2: #0f172a;
  --border: #24324e;
  --text: #e2e8f0;
  --muted: #9aa7bd;
  --accent: #00d9ff;
  --accent-2: #ff1694;
  --ok: #ffd700;
  --danger: #ff4444;
  --green: #00e676;
  --shadow-off: 4px;
  --radius: 6px;
  --font: 'Inter', 'Segoe UI', system-ui, -apple-system, sans-serif;
}

html { font-size: 16px; }
body {
  font-family: var(--font);
  background: var(--bg);
  color: var(--text);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  overflow-x: hidden;
}

/* ----- Toolbar ----- */
.toolbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 16px 24px;
  background: var(--panel);
  border-bottom: 3px solid var(--border);
  position: sticky;
  top: 0;
  z-index: 50;
}
.toolbar-title {
  font-size: 1.5rem;
  font-weight: 800;
  letter-spacing: -0.02em;
}
.toolbar-actions { display: flex; gap: 10px; flex-wrap: wrap; }

/* ----- Buttons ----- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 10px 20px;
  font-size: 0.9rem;
  font-weight: 700;
  font-family: var(--font);
  border: 3px solid #000;
  border-radius: var(--radius);
  cursor: pointer;
  transition: transform 0.1s, box-shadow 0.1s;
  position: relative;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  white-space: nowrap;
}
.btn:hover { transform: translate(-1px, -1px); }
.btn:active { transform: translate(1px, 1px); box-shadow: none !important; }
.btn:focus-visible { outline: 3px solid var(--accent); outline-offset: 2px; }

.btn--accent {
  background: var(--accent-2);
  color: #fff;
  box-shadow: var(--shadow-off) var(--shadow-off) 0 #000;
}
.btn--muted {
  background: var(--panel-2);
  color: var(--muted);
  box-shadow: var(--shadow-off) var(--shadow-off) 0 #000;
}
.btn--danger {
  background: var(--danger);
  color: #fff;
  box-shadow: var(--shadow-off) var(--shadow-off) 0 #000;
}
.btn--ok {
  background: var(--ok);
  color: #000;
  box-shadow: var(--shadow-off) var(--shadow-off) 0 #000;
}
.btn--icon {
  width: 36px; height: 36px;
  padding: 0;
  justify-content: center;
  font-size: 1.1rem;
  box-shadow: 2px 2px 0 #000;
}

/* ----- Card Grid ----- */
.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 20px;
  padding: 24px;
  flex: 1;
}
.card-grid:empty::after {
  content: 'Нет карточек. Нажмите «+ Новая карточка» чтобы создать.';
  display: block;
  grid-column: 1 / -1;
  text-align: center;
  color: var(--muted);
  padding: 60px 20px;
  font-size: 1.1rem;
}

/* ----- Card Component ----- */
.card {
  background: var(--panel);
  border: 3px solid var(--border);
  border-radius: calc(var(--radius) + 4px);
  padding: 20px;
  display: flex;
  flex-direction: column;
  gap: 12px;
  position: relative;
  box-shadow: var(--shadow-off) var(--shadow-off) 0 #000;
  transition: border-color 0.2s, transform 0.15s;
}
.card:hover { border-color: var(--accent); transform: translateY(-2px); }
.card--active { border-color: var(--accent-2) !important; box-shadow: 0 0 20px rgba(255,22,148,0.3), var(--shadow-off) var(--shadow-off) 0 #000; }
.card--silence { border-color: var(--ok) !important; }

.card-emoji { font-size: 2.8rem; line-height: 1; }

.card-title {
  font-size: 1.3rem;
  font-weight: 800;
  letter-spacing: -0.01em;
  word-break: break-word;
}

.card-badge {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 4px 10px;
  border-radius: 20px;
  font-size: 0.72rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  border: 2px solid #000;
  width: fit-content;
}
.card-badge--info  { background: var(--accent); color: #000; }
.card-badge--timer { background: var(--ok); color: #000; }
.card-badge--silence { background: var(--green); color: #000; }

.card-timer-preview {
  font-size: 1.6rem;
  font-weight: 800;
  font-variant-numeric: tabular-nums;
  color: var(--ok);
  letter-spacing: 0.06em;
}
.card-timer-preview.running { animation: pulse 1s infinite; }

.card-hotkey {
  font-size: 0.78rem;
  color: var(--muted);
}
.card-hotkey kbd {
  display: inline-block;
  padding: 2px 8px;
  background: var(--panel-2);
  border: 2px solid var(--border);
  border-radius: 4px;
  font-family: var(--font);
  font-weight: 700;
  color: var(--accent);
  margin-left: 4px;
}

.card-actions {
  display: flex;
  gap: 8px;
  margin-top: auto;
  flex-wrap: wrap;
}

/* ----- Overlay / Fullscreen card ----- */
.overlay {
  position: fixed;
  inset: 0;
  z-index: 100;
  background: rgba(11,18,34,0.96);
  display: flex;
  align-items: center;
  justify-content: center;
  backdrop-filter: blur(8px);
}
.overlay.hidden { display: none; }

.overlay-card {
  text-align: center;
  animation: popIn 0.35s cubic-bezier(0.175, 0.885, 0.32, 1.275);
}
.overlay-emoji { font-size: 8rem; display: block; line-height: 1; }
.overlay-title {
  font-size: 4rem;
  font-weight: 900;
  letter-spacing: -0.03em;
  margin-top: 16px;
  color: var(--text);
  text-shadow: 4px 4px 0 #000;
}

.overlay-timer { margin-top: 32px; }
.overlay-timer.hidden { display: none; }
.overlay-timer-digits {
  font-size: 8rem;
  font-weight: 900;
  font-variant-numeric: tabular-nums;
  color: var(--ok);
  letter-spacing: 0.04em;
  text-shadow: 4px 4px 0 #000;
}
.overlay-timer-digits.warning { color: var(--danger); animation: pulse 0.6s infinite; }

.overlay-close {
  position: fixed;
  top: 24px;
  right: 24px;
  width: 56px;
  height: 56px;
  border: 3px solid #000;
  border-radius: 50%;
  background: var(--accent-2);
  color: #fff;
  font-size: 1.6rem;
  cursor: pointer;
  box-shadow: var(--shadow-off) var(--shadow-off) 0 #000;
  transition: transform 0.1s;
  z-index: 101;
}
.overlay-close:hover { transform: scale(1.08); }
.overlay-close:active { transform: scale(0.95); }

/* ----- Modal ----- */
.modal { position: fixed; inset: 0; z-index: 200; display: flex; align-items: center; justify-content: center; }
.modal.hidden { display: none; }

.modal-backdrop {
  position: absolute; inset: 0;
  background: rgba(11,18,34,0.85);
  backdrop-filter: blur(4px);
}
.modal-panel {
  position: relative;
  background: var(--panel);
  border: 3px solid var(--border);
  border-radius: calc(var(--radius) + 6px);
  padding: 28px 24px;
  width: 90vw;
  max-width: 480px;
  box-shadow: 8px 8px 0 #000;
  display: flex;
  flex-direction: column;
  gap: 18px;
  animation: popIn 0.3s cubic-bezier(0.175, 0.885, 0.32, 1.275);
}
.modal-title {
  font-size: 1.2rem;
  font-weight: 800;
  letter-spacing: -0.01em;
}

.field {
  display: flex;
  flex-direction: column;
  gap: 6px;
}
.field > span {
  font-size: 0.82rem;
  font-weight: 700;
  color: var(--muted);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}
.field input[type="text"],
.field input[type="number"] {
  padding: 10px 14px;
  background: var(--panel-2);
  border: 2px solid var(--border);
  border-radius: var(--radius);
  color: var(--text);
  font-family: var(--font);
  font-size: 0.95rem;
  outline: none;
  transition: border-color 0.15s;
}
.field input:focus { border-color: var(--accent); }
.field.hidden { display: none; }

.radio-group {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}
.radio {
  display: flex;
  align-items: center;
  gap: 6px;
  cursor: pointer;
  font-size: 0.88rem;
  padding: 8px 12px;
  background: var(--panel-2);
  border: 2px solid var(--border);
  border-radius: var(--radius);
  transition: border-color 0.15s;
}
.radio:has(input:checked) { border-color: var(--accent-2); }
.radio input[type="radio"] { accent-color: var(--accent-2); width: 16px; height: 16px; }

.modal-actions {
  display: flex;
  gap: 10px;
  justify-content: flex-end;
  margin-top: 6px;
}

/* ----- Confirm dialog ----- */
.confirm-dialog {
  position: fixed; inset: 0; z-index: 300;
  display: flex; align-items: center; justify-content: center;
}
.confirm-dialog.hidden { display: none; }
.confirm-dialog-backdrop {
  position: absolute; inset: 0;
  background: rgba(11,18,34,0.9);
}
.confirm-dialog-panel {
  position: relative;
  background: var(--panel);
  border: 3px solid var(--danger);
  border-radius: calc(var(--radius) + 6px);
  padding: 24px;
  width: 90vw;
  max-width: 400px;
  box-shadow: 8px 8px 0 #000;
  text-align: center;
  animation: popIn 0.3s cubic-bezier(0.175, 0.885, 0.32, 1.275);
}
.confirm-dialog-text {
  font-size: 1.1rem;
  font-weight: 700;
  margin-bottom: 20px;
  line-height: 1.4;
}
.confirm-dialog-actions {
  display: flex;
  gap: 10px;
  justify-content: center;
}

/* ----- Animations ----- */
@keyframes popIn {
  0%   { transform: scale(0.85); opacity: 0; }
  100% { transform: scale(1);    opacity: 1; }
}
@keyframes pulse {
  0%, 100% { opacity: 1; }
  50%      { opacity: 0.5; }
}
@keyframes flash {
  0%, 100% { background: transparent; }
  25% { background: rgba(255,215,0,0.15); }
  50% { background: rgba(0,230,118,0.15); }
  75% { background: rgba(255,22,148,0.15); }
}
.flash { animation: flash 0.6s ease-in-out; }

/* ----- Responsive ----- */
@media (max-width: 600px) {
  .card-grid {
    grid-template-columns: 1fr;
    padding: 16px;
    gap: 14px;
  }
  .toolbar {
    flex-direction: column;
    align-items: flex-start;
    gap: 10px;
  }
  .overlay-title { font-size: 2.2rem; }
  .overlay-timer-digits { font-size: 4.5rem; }
  .overlay-emoji { font-size: 4.5rem; }
  .btn { padding: 8px 14px; font-size: 0.8rem; }
}

/* ----- Print (hide UI, show overlay if active) ----- */
@media print {
  .toolbar, .card-grid, .overlay-close, .modal, .confirm-dialog { display: none !important; }
  .overlay { position: static; background: #fff; }
  .overlay-title { color: #000; text-shadow: none; }
  .overlay-timer-digits { color: #000; text-shadow: none; }
}