/* ---------- Tokens ---------- */
:root {
  --bg-0: #03060f;
  --bg-1: #0b1020;
  --bg-2: #121833;
  --fg-0: #e6ecff;
  --fg-1: #aab3d3;
  --fg-2: #6b7596;
  --accent: #7fdfff;
  --accent-glow: rgba(127, 223, 255, 0.35);
  --magenta: #ff7fbf;
  --warn: #ffd27f;
  --gap: #2a3354;
  --gap-fg: #4a5277;
  --border: rgba(127, 223, 255, 0.18);
  --border-soft: rgba(127, 223, 255, 0.08);
  --radius: 10px;
  --shadow: 0 8px 30px rgba(0, 0, 0, 0.4);
  --font-mono: ui-monospace, "JetBrains Mono", "SF Mono", Menlo, Consolas, monospace;
  --font-body: system-ui, -apple-system, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
  min-height: 100vh;
  background:
    radial-gradient(1200px 800px at 70% -10%, rgba(127, 127, 255, 0.08), transparent 60%),
    radial-gradient(900px 600px at 20% 100%, rgba(255, 127, 191, 0.06), transparent 60%),
    radial-gradient(ellipse at center, var(--bg-1) 0%, var(--bg-0) 100%);
  color: var(--fg-0);
  font-family: var(--font-body);
  font-size: 15px;
  line-height: 1.5;
}

a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }
button { font-family: inherit; }

/* ---------- Starfield (CSS-only) ---------- */
.starfield {
  position: fixed; inset: 0; z-index: 0; pointer-events: none;
  background:
    radial-gradient(1px 1px at 20% 30%, #ffffff80 0, transparent 50%),
    radial-gradient(1px 1px at 80% 20%, #ffffff66 0, transparent 50%),
    radial-gradient(1px 1px at 40% 70%, #ffffff90 0, transparent 50%),
    radial-gradient(1px 1px at 65% 85%, #ffffff70 0, transparent 50%),
    radial-gradient(1px 1px at 90% 60%, #ffffff60 0, transparent 50%),
    radial-gradient(1px 1px at 15% 90%, #ffffff90 0, transparent 50%),
    radial-gradient(1px 1px at 55% 15%, #ffffff70 0, transparent 50%),
    radial-gradient(1px 1px at 30% 50%, #ffffff50 0, transparent 50%);
  opacity: 0.6;
  animation: twinkle 8s ease-in-out infinite alternate;
}
@keyframes twinkle { from { opacity: 0.4 } to { opacity: 0.75 } }

/* ---------- Layout ---------- */
.topbar {
  position: relative;
  z-index: 10;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 0.9rem 1.4rem;
  border-bottom: 1px solid var(--border-soft);
  backdrop-filter: blur(6px);
  background: rgba(3, 6, 15, 0.55);
}
.brand {
  font-family: var(--font-mono);
  font-weight: 700;
  letter-spacing: 0.2em;
  font-size: 0.95rem;
  color: var(--fg-0);
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
}
.brand:hover { text-decoration: none; }
.brand-dot {
  display: inline-block;
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: radial-gradient(circle at 30% 30%, #9beaff, var(--accent) 60%, #2b6c8a 100%);
  box-shadow: 0 0 12px var(--accent-glow);
}
.topnav {
  display: flex;
  gap: 1.2rem;
  font-family: var(--font-mono);
  font-size: 0.85rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}
.topnav a {
  color: var(--fg-1);
  padding: 0.3rem 0.1rem;
  border-bottom: 1px solid transparent;
  transition: color 0.15s, border-color 0.15s;
}
.topnav a:hover { color: var(--fg-0); text-decoration: none; }
.topnav a[aria-current="page"] {
  color: var(--accent);
  border-bottom-color: var(--accent);
}
.topnav-btn {
  background: transparent;
  border: 1px solid var(--border-soft);
  color: var(--fg-1);
  width: 32px; height: 32px;
  border-radius: 6px;
  cursor: pointer;
  font-size: 0.95rem;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  transition: border-color 0.15s, color 0.15s;
}
.topnav-btn:hover { color: var(--accent); border-color: var(--accent); }

/* ---------- Settings modal ---------- */
.modal {
  position: fixed;
  inset: 0;
  z-index: 1000;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 1rem;
}
.modal[hidden] { display: none; }
.modal-backdrop {
  position: absolute;
  inset: 0;
  background: rgba(0, 0, 0, 0.55);
  backdrop-filter: blur(2px);
  cursor: pointer;
}
.modal-card {
  position: relative;
  z-index: 1;
  width: min(520px, calc(100vw - 2rem));
  max-height: calc(100vh - 2rem);
  overflow-y: auto;
  padding: 1.4rem;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: rgba(8, 12, 26, 0.98);
  color: var(--fg-0);
  box-shadow: var(--shadow);
  display: flex;
  flex-direction: column;
  gap: 1rem;
}
.modal-card h3 {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 0.95rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--accent);
}
.settings-blurb {
  margin: 0;
  font-size: 0.85rem;
  line-height: 1.55;
  color: var(--fg-1);
}
.settings-blurb code {
  font-family: var(--font-mono);
  font-size: 0.85em;
  background: rgba(127, 223, 255, 0.08);
  padding: 1px 4px;
  border-radius: 3px;
}
.settings-row {
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
}
.settings-row label {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--fg-2);
}
.settings-row input {
  border: 1px solid var(--border);
  background: rgba(3, 6, 15, 0.6);
  color: var(--fg-0);
  padding: 0.55rem 0.75rem;
  border-radius: var(--radius);
  font-family: var(--font-mono);
  font-size: 0.9rem;
}
.settings-row input:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-glow);
}
.settings-status {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--fg-2);
}
.settings-status strong { color: var(--fg-0); }
.settings-status.custom strong { color: var(--accent); }
.settings-actions {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  flex-wrap: wrap;
}

#view {
  position: relative;
  z-index: 1;
  max-width: 1200px;
  margin: 0 auto;
  padding: 2rem 1.4rem 4rem;
  min-height: 60vh;
}

.footer {
  position: relative;
  z-index: 1;
  padding: 1.4rem;
  text-align: center;
  color: var(--fg-2);
  font-size: 0.85rem;
  font-family: var(--font-mono);
  border-top: 1px solid var(--border-soft);
}
.footer .sep { margin: 0 0.5rem; opacity: 0.5; }

/* ---------- View headers / controls ---------- */
.view-header {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  margin-bottom: 1.5rem;
}
.view-title {
  font-family: var(--font-mono);
  font-size: 1.2rem;
  font-weight: 600;
  letter-spacing: 0.06em;
  margin: 0;
}
.view-title small {
  display: block;
  color: var(--fg-2);
  font-size: 0.75rem;
  letter-spacing: 0.08em;
  font-weight: 400;
  margin-top: 0.2rem;
  text-transform: uppercase;
}

.controls {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.5rem;
}
.btn {
  border: 1px solid var(--border);
  background: rgba(127, 223, 255, 0.04);
  color: var(--fg-0);
  padding: 0.45rem 0.9rem;
  border-radius: var(--radius);
  cursor: pointer;
  font-size: 0.85rem;
  font-family: var(--font-mono);
  letter-spacing: 0.04em;
  transition: background 0.15s, border-color 0.15s, transform 0.05s;
}
.btn:hover { background: rgba(127, 223, 255, 0.10); border-color: var(--accent); }
.btn:active { transform: translateY(1px); }
.btn[disabled] { opacity: 0.4; cursor: not-allowed; }
.btn-primary {
  border-color: var(--accent);
  background: rgba(127, 223, 255, 0.15);
}
.select, .date-input {
  border: 1px solid var(--border);
  background: rgba(3, 6, 15, 0.6);
  color: var(--fg-0);
  padding: 0.45rem 0.7rem;
  border-radius: var(--radius);
  font-family: var(--font-mono);
  font-size: 0.85rem;
}
.select:focus, .date-input:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-glow);
}

/* ---------- Calendar ---------- */
.cal-meta {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--fg-2);
  letter-spacing: 0.06em;
}
.cal-grid {
  display: grid;
  grid-template-columns: repeat(7, 1fr);
  gap: 6px;
  margin-top: 1rem;
}
.cal-dow {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--fg-2);
  text-align: center;
  padding: 0.4rem 0;
}
.cal-cell {
  position: relative;
  aspect-ratio: 1 / 1;
  min-height: 70px;
  border-radius: var(--radius);
  border: 1px solid var(--border-soft);
  background: rgba(11, 16, 32, 0.6);
  display: flex;
  flex-direction: column;
  padding: 0.4rem 0.5rem;
  cursor: pointer;
  transition: transform 0.1s, border-color 0.15s, box-shadow 0.15s, background 0.15s;
  text-align: left;
  color: inherit;
  font-family: inherit;
  font-size: inherit;
}
.cal-cell .day-num {
  font-family: var(--font-mono);
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--fg-1);
}
.cal-cell .day-tag {
  margin-top: auto;
  font-family: var(--font-mono);
  font-size: 0.6rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--accent);
  opacity: 0.7;
}
.cal-cell.available:hover {
  border-color: var(--accent);
  transform: translateY(-1px);
  box-shadow: 0 6px 16px var(--accent-glow);
}
.cal-cell.gap {
  background: rgba(42, 51, 84, 0.25);
  border-color: rgba(74, 82, 119, 0.3);
  color: var(--gap-fg);
  cursor: not-allowed;
}
.cal-cell.gap .day-num { color: var(--gap-fg); }
.cal-cell.gap .day-tag { color: var(--magenta); opacity: 0.5; }
.cal-cell.outside { opacity: 0.25; }
.cal-cell.today {
  border-color: var(--accent);
  box-shadow: inset 0 0 0 1px var(--accent-glow);
}
.cal-cell.today .day-num { color: var(--accent); }
.cal-cell:focus { outline: 2px solid var(--accent); outline-offset: 2px; }

/* ---------- Day view ---------- */
.day-stage {
  display: grid;
  grid-template-columns: 1fr 320px;
  gap: 1.5rem;
}
.day-image-wrap {
  position: relative;
  border-radius: var(--radius);
  overflow: hidden;
  border: 1px solid var(--border-soft);
  background: #000;
  aspect-ratio: 1 / 1;
}
.day-image-wrap img {
  position: absolute; inset: 0;
  width: 100%; height: 100%;
  object-fit: contain;
  opacity: 0;
  transition: opacity 0.2s;
}
.day-image-wrap img.active { opacity: 1; }
.day-progress {
  position: absolute; left: 0; right: 0; bottom: 0;
  height: 3px;
  background: rgba(127, 223, 255, 0.1);
}
.day-progress > span {
  display: block; height: 100%;
  background: linear-gradient(90deg, var(--accent), var(--magenta));
  transition: width 0.1s linear;
}

.day-controls {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  margin-top: 1rem;
  flex-wrap: wrap;
}
.day-controls .scrub {
  flex: 1;
  min-width: 200px;
}
.scrub {
  -webkit-appearance: none;
  appearance: none;
  height: 4px;
  background: rgba(127, 223, 255, 0.2);
  border-radius: 4px;
}
.scrub::-webkit-slider-thumb {
  -webkit-appearance: none;
  width: 16px; height: 16px;
  border-radius: 50%;
  background: var(--accent);
  box-shadow: 0 0 12px var(--accent-glow);
  cursor: pointer;
}
.scrub::-moz-range-thumb {
  width: 16px; height: 16px;
  border-radius: 50%;
  background: var(--accent);
  border: none;
  cursor: pointer;
}

.hud {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  padding: 1rem;
  border-radius: var(--radius);
  border: 1px solid var(--border-soft);
  background: rgba(11, 16, 32, 0.4);
  font-family: var(--font-mono);
  font-size: 0.85rem;
}
.hud-row {
  display: flex; justify-content: space-between; gap: 1rem;
}
.hud-row .k { color: var(--fg-2); text-transform: uppercase; font-size: 0.7rem; letter-spacing: 0.08em; }
.hud-row .v { color: var(--fg-0); }
.hud-caption {
  margin-top: 0.5rem;
  padding-top: 0.5rem;
  border-top: 1px solid var(--border-soft);
  font-size: 0.8rem;
  color: var(--fg-1);
  font-family: var(--font-body);
}

/* ---------- Range filmstrip ---------- */
.film-controls {
  display: flex; align-items: center; gap: 0.75rem; flex-wrap: wrap;
  margin-bottom: 1rem;
}
.film-info {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--fg-2);
  margin-top: 1rem;
}
.filmstrip {
  display: flex;
  gap: 8px;
  overflow-x: auto;
  padding: 1rem 0.5rem;
  border-radius: var(--radius);
  border: 1px solid var(--border-soft);
  background: rgba(11, 16, 32, 0.4);
  scroll-snap-type: x mandatory;
}
.film-frame {
  flex: 0 0 auto;
  width: 140px;
  height: 140px;
  border-radius: 8px;
  overflow: hidden;
  position: relative;
  cursor: pointer;
  border: 1px solid var(--border-soft);
  background: #000;
  scroll-snap-align: start;
  transition: transform 0.15s, border-color 0.15s;
}
.film-frame:hover { transform: translateY(-2px); border-color: var(--accent); }
.film-frame.active {
  border-color: var(--accent);
  box-shadow: 0 0 0 2px var(--accent-glow);
}
.film-frame img {
  width: 100%; height: 100%;
  object-fit: cover;
  opacity: 0;
  transition: opacity 0.3s;
}
.film-frame img.loaded { opacity: 1; }
.film-frame .frame-label {
  position: absolute; bottom: 0; left: 0; right: 0;
  padding: 4px 6px;
  background: linear-gradient(transparent, rgba(0, 0, 0, 0.8));
  font-family: var(--font-mono);
  font-size: 0.65rem;
  letter-spacing: 0.05em;
  color: var(--fg-0);
}

.film-day-divider {
  flex: 0 0 auto;
  width: 1px;
  background: linear-gradient(to bottom, transparent, var(--accent), transparent);
  opacity: 0.3;
}

/* ---------- Compare ---------- */
.compare-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1rem;
}
.compare-side {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}
.compare-side .day-image-wrap { aspect-ratio: 1 / 1; }
.compare-controls {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1rem;
  margin-bottom: 1rem;
}
.compare-shared {
  margin-top: 1rem;
  padding-top: 1rem;
  border-top: 1px solid var(--border-soft);
  display: flex;
  align-items: center;
  gap: 0.75rem;
  flex-wrap: wrap;
}

/* ---------- States: loading / error / empty ---------- */
.status {
  padding: 2rem;
  text-align: center;
  font-family: var(--font-mono);
  color: var(--fg-1);
  font-size: 0.9rem;
}
.status .spinner {
  display: inline-block;
  width: 18px; height: 18px;
  border: 2px solid rgba(127, 223, 255, 0.2);
  border-top-color: var(--accent);
  border-radius: 50%;
  animation: spin 0.9s linear infinite;
  margin-right: 0.5rem;
  vertical-align: middle;
}
@keyframes spin { to { transform: rotate(360deg); } }

.shimmer {
  background: linear-gradient(90deg,
    rgba(127, 223, 255, 0.04) 0%,
    rgba(127, 223, 255, 0.12) 50%,
    rgba(127, 223, 255, 0.04) 100%);
  background-size: 200% 100%;
  animation: shimmer 1.4s linear infinite;
}
@keyframes shimmer { from { background-position: 200% 0 } to { background-position: -200% 0 } }

/* ---------- Toast ---------- */
.toast {
  position: fixed;
  bottom: 1.4rem; left: 50%;
  transform: translateX(-50%) translateY(20px);
  background: rgba(11, 16, 32, 0.95);
  border: 1px solid var(--border);
  color: var(--fg-0);
  padding: 0.6rem 1rem;
  border-radius: var(--radius);
  font-family: var(--font-mono);
  font-size: 0.85rem;
  pointer-events: none;
  opacity: 0;
  transition: opacity 0.2s, transform 0.2s;
  z-index: 100;
  box-shadow: var(--shadow);
}
.toast.show { opacity: 1; transform: translateX(-50%) translateY(0); }
.toast.error { border-color: var(--magenta); color: var(--magenta); }
.toast.warn { border-color: var(--warn); color: var(--warn); }

/* ---------- Responsive ---------- */
@media (max-width: 800px) {
  .day-stage { grid-template-columns: 1fr; }
  .compare-grid { grid-template-columns: 1fr; }
  .compare-controls { grid-template-columns: 1fr; }
  .cal-cell { min-height: 56px; }
  .topnav { gap: 0.6rem; font-size: 0.75rem; }
  #view { padding: 1rem 0.9rem 3rem; }
}