@import url('https://fonts.googleapis.com/css2?family=Orbitron:wght@400;700;900&display=swap');

:root {
  --bg: #080810;
  --surface: #0f0f1a;
  --surface-2: #161624;
  --border: #1e1e32;
  --accent: #00d4ff;
  --accent-glow: rgba(0, 212, 255, 0.25);
  --warn: #ffb300;
  --warn-glow: rgba(255, 179, 0, 0.25);
  --danger: #ff3d3d;
  --danger-glow: rgba(255, 61, 61, 0.3);
  --text: #dde1f0;
  --muted: #454566;
  --muted-2: #2a2a44;
}

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

html, body {
  height: 100%;
  overflow: hidden;
}

body {
  background: var(--bg);
  color: var(--text);
  font-family: -apple-system, 'Segoe UI', 'Apple SD Gothic Neo', sans-serif;
  display: flex;
  flex-direction: column;
  -webkit-font-smoothing: antialiased;
}

/* ── TOP BAR ── */
.top-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1.6vh 3.5vw;
  background: var(--surface);
  border-bottom: 1px solid var(--border);
  flex-shrink: 0;
}

.room-badge {
  display: flex;
  align-items: baseline;
  gap: 0.6rem;
}

.room-label {
  font-size: 1.1vw;
  color: var(--muted);
  text-transform: uppercase;
  letter-spacing: 0.18em;
}

.room-number {
  font-family: 'Orbitron', monospace;
  font-size: 2.8vw;
  font-weight: 700;
  color: var(--accent);
  text-shadow: 0 0 20px var(--accent-glow);
}

.subject-info {
  font-size: 2vw;
  font-weight: 600;
  letter-spacing: 0.04em;
  color: var(--text);
}

.time-range {
  display: flex;
  align-items: center;
  gap: 0.8rem;
  font-size: 1.4vw;
  color: var(--muted);
  font-variant-numeric: tabular-nums;
  letter-spacing: 0.05em;
}

.time-range .sep {
  color: var(--muted-2);
}

/* ── CLOCK AREA ── */
.clock-area {
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 3.5vh;
  padding: 2vh 5vw;
}

.clock {
  font-family: 'Orbitron', monospace;
  font-size: 19vw;
  font-weight: 900;
  line-height: 1;
  letter-spacing: 0.04em;
  color: var(--accent);
  text-shadow: 0 0 80px var(--accent-glow), 0 0 160px rgba(0,212,255,0.08);
  transition: color 0.6s ease, text-shadow 0.6s ease;
  user-select: none;
}

.clock.warn {
  color: var(--warn);
  text-shadow: 0 0 80px var(--warn-glow), 0 0 160px rgba(255,179,0,0.08);
}

.clock.danger {
  color: var(--danger);
  text-shadow: 0 0 80px var(--danger-glow), 0 0 160px rgba(255,61,61,0.1);
  animation: blink 1.2s ease-in-out infinite;
}

@keyframes blink {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.65; }
}

/* ── PROGRESS BAR ── */
.progress-wrap {
  width: 68vw;
  display: flex;
  flex-direction: column;
  gap: 0.8vh;
}

.progress-track {
  height: 5px;
  background: var(--border);
  border-radius: 99px;
  overflow: hidden;
}

.progress-fill {
  height: 100%;
  width: 0%;
  border-radius: 99px;
  background: linear-gradient(90deg, #0099bb, var(--accent));
  transition: width 1s linear, background 0.6s ease;
}

.progress-fill.warn {
  background: linear-gradient(90deg, #cc8800, var(--warn));
}

.progress-fill.danger {
  background: linear-gradient(90deg, #cc1111, var(--danger));
}

/* ── TIME STATS ── */
.time-stats {
  display: flex;
  align-items: center;
  gap: 9vw;
}

.stat {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.5rem;
}

.stat-label {
  font-size: 0.95vw;
  color: var(--muted);
  text-transform: uppercase;
  letter-spacing: 0.18em;
}

.stat-value {
  font-family: 'Orbitron', monospace;
  font-size: 1.9vw;
  color: var(--text);
  font-variant-numeric: tabular-nums;
}

.stat.center .stat-label {
  font-size: 1vw;
  color: var(--accent);
  text-shadow: 0 0 12px var(--accent-glow);
}

.stat.center .stat-value {
  font-size: 3.2vw;
  color: var(--accent);
  text-shadow: 0 0 24px var(--accent-glow);
}

.stat.center.warn .stat-label,
.stat.center.warn .stat-value {
  color: var(--warn);
  text-shadow: 0 0 24px var(--warn-glow);
}

.stat.center.danger .stat-label,
.stat.center.danger .stat-value {
  color: var(--danger);
  text-shadow: 0 0 24px var(--danger-glow);
}

/* ── ATTENDANCE BAR ── */
.att-bar {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 2.5vw;
  padding: 1.5vh 3.5vw;
  background: var(--surface);
  border-top: 1px solid var(--border);
  flex-shrink: 0;
}

.att-field {
  display: flex;
  align-items: center;
  gap: 0.9rem;
}

.att-field span {
  font-size: 1.2vw;
  color: var(--muted);
  letter-spacing: 0.08em;
}

.att-field input {
  width: 5.5vw;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 8px;
  color: var(--text);
  font-family: 'Orbitron', monospace;
  font-size: 1.8vw;
  text-align: center;
  padding: 0.4rem 0.5rem;
  outline: none;
  transition: border-color 0.2s, box-shadow 0.2s;
  -webkit-appearance: none;
}

.att-field input::-webkit-outer-spin-button,
.att-field input::-webkit-inner-spin-button { -webkit-appearance: none; }

.att-field input:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(0,212,255,0.1);
}

.att-divider {
  width: 1px;
  height: 2.5vh;
  background: var(--border);
}

.btn-save {
  background: var(--accent);
  color: #000;
  border: none;
  border-radius: 8px;
  padding: 0.55rem 2.2rem;
  font-size: 1.15vw;
  font-weight: 700;
  letter-spacing: 0.06em;
  cursor: pointer;
  transition: opacity 0.15s, transform 0.1s;
}

.btn-save:hover { opacity: 0.85; }
.btn-save:active { transform: scale(0.97); }

.save-msg {
  font-size: 1vw;
  min-width: 5vw;
  transition: opacity 0.3s;
}

.save-msg.ok { color: #00cc88; }
.save-msg.err { color: var(--danger); }
.save-msg.hidden { opacity: 0; }

/* ── ANNOUNCEMENT OVERLAY ── */
.overlay {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.82);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 200;
  backdrop-filter: blur(6px);
  animation: fadeIn 0.3s ease;
}

.overlay.hidden { display: none; }

@keyframes fadeIn {
  from { opacity: 0; }
  to { opacity: 1; }
}

.overlay-box {
  font-size: 4.5vw;
  font-weight: 700;
  color: var(--text);
  text-align: center;
  line-height: 1.4;
  padding: 4rem 6rem;
  background: var(--surface-2);
  border: 1px solid var(--accent);
  border-radius: 1.2rem;
  box-shadow: 0 0 80px var(--accent-glow), 0 0 0 1px var(--border);
  max-width: 78vw;
}