:root {
  --bg: #1a1714;
  --bg-rgb: 26,23,20;
  --surface: #241f1a;
  --surface-2: #2d2721;
  --border: #3f382f;
  --text: #ece6da;
  --muted: #a39a8c;
  --teal: #86a9c4;
  --rust: #c17d44;
  --radius: 3px;
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
  background: var(--bg);
  color: var(--text);
  font-family: "Inter", system-ui, sans-serif;
  font-size: 16px;
  line-height: 1.55;
}

h1, h2, h3, h4 {
  font-family: "Space Grotesk", system-ui, sans-serif;
  font-weight: 600;
  letter-spacing: -0.01em;
  margin: 0 0 0.5em;
}

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

.mono {
  font-family: "IBM Plex Mono", monospace;
  letter-spacing: 0.02em;
}

.wrap { max-width: 1100px; margin: 0 auto; padding: 0 20px; }
.wrap.wide { max-width: none; }

/* ---------- Header / nav ---------- */

header.site-header {
  border-bottom: 1px solid var(--border);
  background: var(--surface);
}

.header-inner {
  padding: 22px 28px 18px;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 14px;
}

.brand a {
  color: var(--text);
  font-family: "Space Grotesk", system-ui, sans-serif;
  font-size: 1.5rem;
  font-weight: 700;
}
.brand a:hover { text-decoration: none; color: var(--teal); }

.tagline {
  color: var(--muted);
  font-size: 0.8rem;
}

nav.menu {
  display: flex;
  gap: 20px;
  flex-wrap: wrap;
  font-family: "IBM Plex Mono", monospace;
  font-size: 0.85rem;
  text-transform: lowercase;
}

nav.menu a { color: var(--muted); }
nav.menu a:hover { color: var(--teal); text-decoration: none; }
nav.menu a.btn, nav.menu a.btn:hover { color: var(--bg); }

/* ---------- Forms ---------- */

.admin-wrap { max-width: 780px; margin: 40px auto; }

.field { margin-bottom: 18px; }
.field label {
  display: block;
  font-family: "IBM Plex Mono", monospace;
  font-size: 0.8rem;
  color: var(--muted);
  margin-bottom: 6px;
}

input[type=text], input[type=password], input[type=date], input[type=time], input[type=number], textarea, select {
  width: 100%;
  background: var(--bg);
  border: 1px solid var(--border);
  color: var(--text);
  border-radius: var(--radius);
  padding: 10px 12px;
  font-family: inherit;
  font-size: 0.95rem;
}

textarea { min-height: 90px; font-family: inherit; font-size: 0.9rem; resize: vertical; }

input:focus, textarea:focus, select:focus, button:focus, a:focus {
  outline: 2px solid var(--teal);
  outline-offset: 2px;
}

.btn {
  display: inline-block;
  background: var(--teal);
  color: var(--bg);
  border: none;
  border-radius: var(--radius);
  padding: 10px 18px;
  font-family: "Space Grotesk", sans-serif;
  font-weight: 600;
  cursor: pointer;
  font-size: 0.9rem;
}
.btn:hover { text-decoration: none; opacity: 0.9; }
.btn.secondary { background: transparent; color: var(--text); border: 1px solid var(--border); }
.btn.danger { background: var(--rust); color: #fff; }

.upload-row {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-wrap: wrap;
  margin-top: 8px;
}
.upload-row input[type=file] { flex: 1; min-width: 200px; }

.error-msg { color: var(--rust); margin-bottom: 14px; font-size: 0.9rem; }

footer.site-footer {
  border-top: 1px solid var(--border);
  padding: 24px 0 40px;
  color: var(--muted);
  font-family: "IBM Plex Mono", monospace;
  font-size: 0.75rem;
  margin-top: 40px;
}

/* ---------- Stats bar ---------- */

.stats-bar {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
  gap: 10px;
  margin: 28px 0 24px;
}

.stat-tile {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 14px 16px;
}

.stat-value {
  font-family: "Space Grotesk", sans-serif;
  font-size: 1.6rem;
  font-weight: 700;
  color: var(--text);
}

.stat-label {
  font-family: "IBM Plex Mono", monospace;
  font-size: 0.72rem;
  color: var(--muted);
  text-transform: lowercase;
  margin-top: 2px;
}

/* ---------- Calendar ---------- */

#calendar { margin: 0 0 60px; }

.fc {
  --fc-border-color: var(--border);
  --fc-page-bg-color: var(--bg);
  --fc-neutral-bg-color: var(--surface);
  --fc-list-event-hover-bg-color: var(--surface-2);
  --fc-today-bg-color: rgba(134,169,196,0.10);
  --fc-button-bg-color: var(--surface);
  --fc-button-border-color: var(--border);
  --fc-button-hover-bg-color: var(--surface-2);
  --fc-button-hover-border-color: var(--teal);
  --fc-button-active-bg-color: var(--teal);
  --fc-button-active-border-color: var(--teal);
  font-family: "Inter", system-ui, sans-serif;
}

.fc .fc-toolbar-title {
  font-family: "Space Grotesk", sans-serif;
  font-size: 1.2rem;
  color: var(--text);
}

.fc .fc-button {
  text-transform: lowercase;
  font-family: "IBM Plex Mono", monospace;
  font-size: 0.8rem;
  box-shadow: none !important;
}

.fc .fc-button-primary:disabled { opacity: 0.4; }
.fc .fc-button-active { color: var(--bg) !important; }

.fc-daygrid-day-number, .fc-col-header-cell-cushion {
  color: var(--muted);
  font-family: "IBM Plex Mono", monospace;
  font-size: 0.8rem;
}

.fc-event {
  border-radius: var(--radius);
  border-width: 1px !important;
  padding: 1px 4px;
  font-size: 0.78rem;
  cursor: pointer;
}

.fc-daygrid-event-dot { display: none; }

.fc-event.past-event {
  opacity: 0.55;
  cursor: default;
}

.fc-event.planned-event {
  border-style: dashed !important;
  background-image: repeating-linear-gradient(135deg, rgba(0,0,0,0.15) 0 6px, transparent 6px 12px);
}

/* ---------- Week table ---------- */

.week-table-wrap { margin-bottom: 28px; }
.week-table-wrap h3 { display:flex; align-items:baseline; gap:10px; }

.week-table {
  width: 100%;
  border-collapse: collapse;
  table-layout: fixed;
}

.week-table th, .week-table td {
  border: 1px solid var(--border);
}

.week-table thead th {
  background: var(--surface);
  font-family: "IBM Plex Mono", monospace;
  font-size: 0.72rem;
  color: var(--muted);
  text-transform: uppercase;
  padding: 8px 4px;
  text-align: center;
  font-weight: 400;
}

.week-table thead th.today-col { color: var(--teal); }

.week-table tbody th {
  background: var(--surface);
  font-family: "IBM Plex Mono", monospace;
  font-size: 0.7rem;
  color: var(--muted);
  text-align: left;
  padding: 6px 8px;
  width: 64px;
  font-weight: 400;
  vertical-align: top;
}

.day-cell {
  background: var(--bg);
  vertical-align: top;
  padding: 4px;
  height: 90px;
  min-width: 90px;
}

.day-cell.past-cell { background: rgba(0,0,0,0.18); }

.day-cell.drag-over { outline: 2px dashed var(--teal); outline-offset: -2px; }

.session-card {
  display: block;
  width: 100%;
  text-align: left;
  background: var(--surface-2);
  border: none;
  border-left: 3px solid var(--teal);
  border-radius: 2px;
  padding: 4px 6px;
  margin-bottom: 4px;
  font-size: 0.72rem;
  line-height: 1.3;
  color: var(--text);
  cursor: grab;
  font-family: inherit;
}
.session-card:active { cursor: grabbing; }
.session-card.past-card { opacity: 0.6; cursor: default; }
.session-card.planned-card { border-left-style: dashed; }

.add-cell-btn {
  display: block;
  width: 100%;
  text-align: center;
  background: none;
  border: 1px dashed var(--border);
  color: var(--muted);
  font-size: 0.72rem;
  padding: 3px;
  cursor: pointer;
  border-radius: 2px;
  font-family: "IBM Plex Mono", monospace;
}
.add-cell-btn:hover { border-color: var(--teal); color: var(--teal); }

/* ---------- Session modal ---------- */

.modal-backdrop {
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.6);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 100;
  padding: 20px;
}

.modal {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 28px;
  max-width: 480px;
  width: 100%;
  max-height: 90vh;
  overflow-y: auto;
  box-shadow: 0 20px 50px rgba(0,0,0,0.5);
}

@media (max-width: 480px) {
  .wrap { padding: 0 14px; }
  .header-inner { padding: 18px 16px 14px; }
}