/* ── Variables ──────────────────────────────────────────────────────────── */

:root {
  --bg: #111113;
  --fg: #e4e4e7;
  --muted: #71717a;
  --border: #27272a;
  --accessible: hsl(142 60% 45%);
  --danger: hsl(0 65% 52%);
  --font: "JetBrains Mono", ui-monospace, monospace;
}

[data-theme="light"] {
  --bg: #fafafa;
  --fg: #18181b;
  --muted: #71717a;
  --border: #e4e4e7;
  --accessible: hsl(142 65% 35%);
  --danger: hsl(0 65% 46%);
}

/* ── Reset ──────────────────────────────────────────────────────────────── */

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

body {
  font-family: var(--font);
  font-size: 12px;
  line-height: 1.6;
  background: var(--bg);
  color: var(--fg);
  -webkit-font-smoothing: antialiased;
  display: flex;
  flex-direction: column;
  min-height: 100vh;
}

/* ── Header ─────────────────────────────────────────────────────────────── */

header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 40px;
  padding: 0 16px;
  border-bottom: 1px solid var(--border);
}

.title {
  font-size: 12px;
  font-weight: 500;
  text-decoration: none;
  color: var(--fg);
  letter-spacing: -0.01em;
}

.title span {
  color: var(--muted);
  font-weight: 400;
}

#theme-btn {
  background: none;
  border: none;
  cursor: pointer;
  padding: 4px;
  display: flex;
  align-items: center;
  color: var(--muted);
  transition: color 0.15s;
}
#theme-btn:hover {
  color: var(--fg);
}

/* ── Main ───────────────────────────────────────────────────────────────── */

main {
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: 40px 24px 24px;
  gap: 36px;
  max-width: 480px;
  width: 100%;
  margin: 0 auto;
}

/* ── Clock ──────────────────────────────────────────────────────────────── */

#clock {
  font-size: 3rem;
  font-weight: 500;
  letter-spacing: -0.02em;
  tabular-nums: all;
  font-variant-numeric: tabular-nums;
}

#clock-sec {
  font-size: 2rem;
  color: var(--muted);
}

/* ── Status ─────────────────────────────────────────────────────────────── */

#status-block {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 6px;
}

#status-label {
  font-size: 1.5rem;
  font-weight: 500;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--muted);
  transition: color 0.3s;
}

#status-label.accessible {
  color: var(--accessible);
}
#status-label.inaccessible {
  color: var(--danger);
}

#status-sub {
  font-size: 11px;
  color: var(--muted);
}

#status-sub strong {
  color: var(--fg);
  font-weight: 500;
}

#status-tide {
  font-size: 10px;
  color: var(--muted);
  letter-spacing: 0.03em;
  min-height: 16px;
}

/* ── Timeline ───────────────────────────────────────────────────────────── */

#timeline-wrap {
  width: 100%;
}

#timeline {
  position: relative;
  height: 10px;
  border-radius: 5px;
  overflow: visible;
  margin-bottom: 6px;
}

#timeline-track {
  position: absolute;
  inset: 0;
  background: var(--border);
  border-radius: 4px;
}

#timeline-windows {
  position: absolute;
  inset: 0;
  border-radius: 4px;
  overflow: hidden;
}

.tw-segment {
  position: absolute;
  top: 0;
  bottom: 0;
  background: var(--accessible);
  opacity: 0.5;
}

/* PM / BM labels above the timeline bar */
#timeline-tide-labels {
  position: relative;
  height: 14px;
  margin-bottom: 3px;
}

.tw-tide-label {
  position: absolute;
  bottom: 0;
  font-size: 8px;
  line-height: 1;
  transform: translateX(-50%);
  color: var(--muted);
  opacity: 0.7;
  white-space: nowrap;
  letter-spacing: 0.03em;
}

.tw-tide-label.is-low {
  color: var(--accessible);
  opacity: 0.6;
}

/* Tide marks — thin lines at each high/low tide time */
#timeline-tides {
  position: absolute;
  inset: 0;
  pointer-events: none;
}

.tw-tide-mark {
  position: absolute;
  width: 1px;
  background: var(--muted);
  opacity: 0.4;
  transform: translateX(-50%);
  border-radius: 1px;
  z-index: 1;
}
.tw-tide-mark.is-high {
  top: 0;
  height: 5px;
}
.tw-tide-mark.is-low {
  bottom: 0;
  height: 5px;
}

/* Tick marks: background-colored cuts at each opens/closes transition */
#timeline-ticks {
  position: absolute;
  inset: 0;
  pointer-events: none;
}

.tw-tick {
  position: absolute;
  width: 2px;
  top: -1px;
  bottom: -1px;
  background: var(--bg);
  transform: translateX(-50%);
  z-index: 2;
  border-radius: 1px;
}

#timeline-now {
  position: absolute;
  top: -4px;
  bottom: -4px;
  width: 2px;
  background: var(--fg);
  border-radius: 1px;
  transform: translateX(-50%);
  z-index: 3;
}

/* Time labels below the bar, aligned to each tick */
#timeline-tick-labels {
  position: relative;
  height: 18px;
}

.tw-tick-label {
  position: absolute;
  top: 2px;
  font-size: 9px;
  white-space: nowrap;
  transform: translateX(-50%);
  color: var(--muted);
  line-height: 1;
}

.tw-tick-label.is-opens {
  color: var(--accessible);
}
.tw-tick-label.is-closes {
  color: var(--danger);
}

#timeline-labels {
  display: flex;
  justify-content: space-between;
  font-size: 9px;
  color: var(--muted);
  opacity: 0.5;
}

/* ── Schedule ───────────────────────────────────────────────────────────── */

#schedule {
  width: 100%;
}

#schedule-date {
  font-size: 10px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--muted);
  padding-bottom: 8px;
  border-bottom: 1px solid var(--border);
  margin-bottom: 4px;
}

.coeff-badge {
  color: var(--fg);
  letter-spacing: 0.05em;
}

/* Tomorrow date separator */
.schedule-day-sep {
  font-size: 10px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--muted);
  padding: 10px 0 8px;
  border-top: 1px solid var(--border);
  margin-top: 4px;
}

/* Access transition rows inserted between tide entries */
.access-marker {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 4px 0;
  font-size: 10px;
  transition: opacity 0.2s;
}

.marker-time {
  font-size: 13px;
  font-weight: 500;
  letter-spacing: 0.01em;
}

.access-marker::before,
.access-marker::after {
  content: "";
  flex: 1;
  height: 1px;
  background: currentColor;
  opacity: 0.2;
}

.access-marker.is-opens {
  color: var(--accessible);
}
.access-marker.is-closes {
  color: var(--danger);
}
.access-marker.past {
  opacity: 0.35;
}

.tide-row {
  display: flex;
  align-items: baseline;
  gap: 12px;
  padding: 4px 0;
  transition: opacity 0.2s;
}

.tide-row.past {
  opacity: 0.35;
}

.tide-arrow {
  width: 12px;
  color: var(--muted);
  font-size: 10px;
}
.tide-time {
  width: 36px;
  font-variant-numeric: tabular-nums;
}
.tide-height {
  width: 52px;
  font-variant-numeric: tabular-nums;
  color: var(--muted);
}

.tide-coeff {
  font-size: 10px;
  color: var(--muted);
}

/* ── Footer ─────────────────────────────────────────────────────────────── */

footer {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 20px;
  height: 40px;
  border-top: 1px solid var(--border);
  padding: 0 16px;
}

footer a {
  display: flex;
  align-items: center;
  color: var(--muted);
  transition: color 0.15s;
}
footer a:hover {
  color: var(--fg);
}

.footer-icon {
  width: 16px;
  height: 16px;
  filter: invert(50%) sepia(0%) saturate(0%);
  transition: filter 0.15s;
}
footer a:hover .footer-icon {
  filter: invert(90%) sepia(0%);
}

[data-theme="light"] .footer-icon {
  filter: invert(40%) sepia(0%);
}
[data-theme="light"] footer a:hover .footer-icon {
  filter: invert(10%) sepia(0%);
}

/* ── Icon (theme toggle) ────────────────────────────────────────────────── */

.icon {
  width: 14px;
  height: 14px;
  filter: invert(50%) sepia(0%);
  transition: filter 0.15s;
}
#theme-btn:hover .icon {
  filter: invert(90%) sepia(0%);
}
[data-theme="light"] .icon {
  filter: invert(40%) sepia(0%);
}
[data-theme="light"] #theme-btn:hover .icon {
  filter: invert(10%) sepia(0%);
}