:root {
  --bg: #050712;
  --bg-alt: #0c1126;
  --panel: #111937;
  --panel-light: #1a2550;
  --text: #f5f7ff;
  --text-muted: #c3c8df;
  --accent: #5ce1e6;
  --accent-warm: #ff7a18;
  --danger: #ff4d6d;
  --success: #5efc8d;
  --border: rgba(255, 255, 255, 0.08);
  --font-main: 'Space Grotesk', 'Segoe UI', sans-serif;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  font-family: var(--font-main);
  background: radial-gradient(circle at top, #10204f, var(--bg));
  color: var(--text);
  line-height: 1.5;
  padding: 0 1.5rem 3rem;
}

img,
svg {
  max-width: 100%;
  display: block;
}

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

a:hover {
  text-decoration: underline;
}

.site-header {
  display: flex;
  justify-content: space-between;
  gap: 2rem;
  padding: 2.5rem 0 1.5rem;
}

.hero-copy {
  max-width: 720px;
}

h1 {
  font-size: clamp(2.5rem, 4vw, 3.5rem);
  margin: 0.25rem 0 1rem;
  letter-spacing: -0.02em;
}

h2 {
  margin: 0;
  font-size: 1.8rem;
}

h3 {
  margin: 0;
  font-size: 1.25rem;
}

p {
  margin: 0;
}

.lede {
  font-size: 1.2rem;
  color: var(--text-muted);
}

.eyebrow {
  text-transform: uppercase;
  letter-spacing: 0.18em;
  font-size: 0.78rem;
  color: var(--accent);
}

.meta-grid {
  margin-top: 1.75rem;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
  gap: 1rem;
}

.meta-label {
  font-size: 0.85rem;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.1em;
}

.meta-value {
  font-size: 1.35rem;
  margin-top: 0.2rem;
}

.hero-actions {
  min-width: 220px;
  display: flex;
  flex-direction: column;
  align-items: flex-end;
  justify-content: flex-start;
  gap: 0.75rem;
}

.ghost-button {
  padding: 0.75rem 1.4rem;
  background: transparent;
  border: 1px solid var(--accent);
  border-radius: 999px;
  color: var(--text);
  font-weight: 600;
  cursor: pointer;
  transition: background 0.2s ease, transform 0.2s ease;
}

.ghost-button:hover {
  background: rgba(92, 225, 230, 0.15);
  transform: translateY(-1px);
}

.status-note {
  color: var(--text-muted);
}

.panel {
  background: rgba(17, 25, 55, 0.85);
  border: 1px solid var(--border);
  border-radius: 28px;
  padding: 1.5rem;
  margin-bottom: 1.5rem;
  box-shadow: 0 30px 60px rgba(0, 0, 0, 0.35);
  backdrop-filter: blur(12px);
}

.control-panel {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 1.25rem;
}

.control-item {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  font-size: 0.95rem;
}

.control-item input,
.control-item select {
  padding: 0.85rem 1rem;
  border-radius: 999px;
  border: 1px solid transparent;
  background: rgba(255, 255, 255, 0.05);
  color: var(--text);
  font-family: inherit;
  font-size: 1rem;
}

.control-item select {
  color: var(--text);
  background: rgba(255, 255, 255, 0.05);
  border-color: transparent;
  appearance: none;
  box-shadow: none;
}

.control-item select option {
  color: var(--text);
  background-color: #050712;
}

.control-item input:focus,
.control-item select:focus {
  outline: none;
  border-color: var(--accent);
  background: rgba(255, 255, 255, 0.08);
}

.layout {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.5rem;
}

.status-panel {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 1.25rem;
}

.status-column {
  border-radius: 22px;
  padding: 1.25rem;
  background: var(--panel-light);
  min-height: 460px;
  display: flex;
  flex-direction: column;
}

.status-column.free {
  background: #102639;
}

.status-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 1.25rem;
}

.status-count {
  width: 3rem;
  height: 3rem;
  border-radius: 999px;
  border: 2px solid var(--border);
  display: grid;
  place-items: center;
  font-size: 1.25rem;
  font-weight: 600;
}

.status-eyebrow {
  text-transform: uppercase;
  font-size: 0.8rem;
  letter-spacing: 0.2em;
  color: var(--text-muted);
}

.room-list {
  flex: 1;
  overflow: auto;
  display: flex;
  flex-direction: column;
  gap: 0.8rem;
}

.room-card {
  width: 100%;
  border: none;
  text-align: left;
  background: rgba(0, 0, 0, 0.25);
  border-radius: 18px;
  padding: 1rem 1.2rem;
  color: inherit;
  cursor: pointer;
  transition: border 0.2s ease, transform 0.2s ease;
  border: 1px solid transparent;
}

.room-card:hover {
  transform: translateY(-2px);
  border-color: rgba(255, 255, 255, 0.15);
}

.room-card.selected {
  border-color: var(--accent);
  box-shadow: 0 0 0 1px var(--accent);
}

.room-card .room-name {
  font-size: 1.05rem;
  font-weight: 600;
}

.room-card .room-status {
  color: var(--text-muted);
  font-size: 0.9rem;
}

.room-card .room-next {
  margin-top: 0.35rem;
  font-size: 0.85rem;
  color: var(--accent);
}

.empty-message {
  color: var(--text-muted);
  font-style: italic;
}

.detail-panel {
  min-height: 500px;
}

.detail-empty {
  text-align: center;
  padding: 3rem 1rem;
  color: var(--text-muted);
}

.detail-content.hidden {
  display: none;
}

.detail-heading {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 1rem;
}

.detail-sub {
  color: var(--text-muted);
  margin-top: 0.35rem;
}

.pill {
  padding: 0.4rem 1rem;
  border-radius: 999px;
  background: rgba(92, 225, 230, 0.2);
  border: 1px solid var(--accent);
}

.pill.busy {
  background: rgba(255, 77, 109, 0.12);
  border-color: var(--danger);
  color: var(--danger);
}

.pill.free {
  background: rgba(94, 252, 141, 0.14);
  border-color: var(--success);
  color: var(--success);
}

.detail-highlights {
  margin: 1.75rem 0;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
  gap: 0.75rem;
}

.timeline,
.week {
  margin-top: 1.5rem;
  padding: 1.25rem;
  border-radius: 20px;
  background: rgba(0, 0, 0, 0.25);
  border: 1px solid rgba(255, 255, 255, 0.07);
}

.timeline-heading {
  display: flex;
  justify-content: space-between;
  align-items: flex-end;
  margin-bottom: 1rem;
}

.timeline-slots {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.timeline-empty {
  color: var(--text-muted);
  font-style: italic;
}

.timeline-slot {
  padding: 0.55rem 0.75rem;
  border-radius: 12px;
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid transparent;
}

.timeline-slot.active {
  border-color: var(--danger);
  background: rgba(255, 77, 109, 0.12);
}

.timeline-slot .slot-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 0.9rem;
}

.slot-course {
  font-weight: 600;
  margin-top: 0.35rem;
}

.slot-bar {
  margin-top: 0.5rem;
  width: 100%;
  height: 6px;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.08);
  overflow: hidden;
}

.slot-bar span {
  display: block;
  height: 100%;
  border-radius: inherit;
  background: linear-gradient(90deg, var(--accent), var(--accent-warm));
  width: var(--fill, 0%);
  transition: width 0.6s ease;
}

.week-grid {
  display: grid;
  grid-template-columns: 120px 1fr;
  row-gap: 0.75rem;
  column-gap: 1rem;
  align-items: start;
}

.week-day {
  font-weight: 600;
  color: var(--text-muted);
}

.week-slots {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
}

.week-chip {
  padding: 0.3rem 0.6rem;
  border-radius: 10px;
  font-size: 0.85rem;
  background: rgba(255, 255, 255, 0.08);
}

.week-chip.busy {
  background: rgba(92, 225, 230, 0.16);
}

.site-footer {
  margin-top: 2rem;
  padding-bottom: 1.5rem;
  color: var(--text-muted);
  text-align: center;
  font-size: 0.9rem;
}

@media (max-width: 1100px) {
  .layout {
    grid-template-columns: 1fr;
  }

  .site-header {
    flex-direction: column;
  }

  .hero-actions {
    align-items: flex-start;
  }
}

@media (max-width: 640px) {
  body {
    padding: 0 1rem 2rem;
  }

  .panel {
    border-radius: 20px;
    padding: 1.25rem;
  }

  .week-grid {
    grid-template-columns: 1fr;
  }

  .week-day {
    margin-bottom: 0.3rem;
  }
}