/* ---------------------------------------------------------------- */
/* The sea window — the centrepiece: a literal view of the water,     */
/* whose level is driven by the live tide height.                     */
/* ---------------------------------------------------------------- */

.sea-window {
  position: relative;
  flex: 1 1 0%;
  min-height: 0;
  margin-top: var(--space-2);
  border-radius: var(--radius-lg);
  border: 1px solid rgba(201, 164, 100, 0.14);
  box-shadow:
    inset 0 0 5vw rgba(0, 0, 0, 0.55),
    inset 0 0 0 1px rgba(0, 0, 0, 0.4);
  overflow: hidden;
}

#sea-canvas {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
}

/* ---------------------------------------------------------------- */
/* Floating level readout — positioned every frame by seaWindow.js    */
/* to track the waterline, so `top` is intentionally left to JS.      */
/* ---------------------------------------------------------------- */

.sea-readout {
  position: absolute;
  left: 50%;
  top: 40%;
  transform: translate(-50%, -100%);
  text-align: center;
  pointer-events: none;
  z-index: 2;
}

.sea-readout-value {
  font-family: var(--font-display);
  font-weight: 500;
  font-size: 4.6rem;
  line-height: 1;
  color: var(--c-brass-100);
  text-shadow:
    0 0 50px var(--c-brass-glow),
    0 4px 28px rgba(0, 0, 0, 0.65);
  font-variant-numeric: tabular-nums;
}

.sea-readout-unit {
  font-family: var(--font-body);
  font-weight: 300;
  font-size: 1.4rem;
  margin-left: 0.35rem;
  color: var(--c-text-300);
  text-shadow: 0 4px 20px rgba(0, 0, 0, 0.65);
}

.sea-readout-state {
  display: flex;
  align-items: baseline;
  justify-content: center;
  gap: 0.55rem;
  margin-top: 0.4rem;
  font-family: var(--font-body);
  font-weight: 500;
  font-size: 1.6rem;
  letter-spacing: 0.03em;
  color: var(--c-water-300);
  text-shadow: 0 2px 20px rgba(0, 0, 0, 0.7);
}

.sea-readout-state .trend-arrow {
  display: inline-block;
  font-size: 1.35rem;
  align-self: center;
  transition: transform var(--dur-med) var(--ease-bridge);
}

.sea-readout-state[data-dir="falling"] .trend-arrow { transform: rotate(90deg); }
.sea-readout-state[data-dir="rising"] .trend-arrow { transform: rotate(0deg); }
.sea-readout-state[data-dir="slack"] .trend-arrow { transform: rotate(45deg); opacity: 0.5; }

.sea-readout-rate {
  font-family: var(--font-body);
  font-weight: 300;
  font-size: 0.9rem;
  color: var(--c-text-500);
}

/* ---------------------------------------------------------------- */
/* Tide HUD cards — small glass plates in the lower corners of the    */
/* window, over the deeper (darker) water where text stays legible.   */
/* ---------------------------------------------------------------- */

.sea-hud {
  position: absolute;
  bottom: var(--space-4);
  z-index: 2;
  padding: var(--space-2) var(--space-3);
  border-radius: var(--radius-md);
  background: rgba(5, 7, 8, 0.38);
  backdrop-filter: blur(6px);
  -webkit-backdrop-filter: blur(6px);
  border: 1px solid rgba(201, 164, 100, 0.16);
}

.sea-hud-left { left: var(--space-4); }
.sea-hud-right {
  right: var(--space-4);
  border-color: rgba(79, 179, 192, 0.18);
}

.sea-hud .event-type {
  font-size: 0.68rem;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--c-text-500);
  margin-bottom: 0.35rem;
}

.sea-hud .event-row {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: var(--space-4);
  margin-top: 0.3rem;
}

.sea-hud .event-time {
  font-family: var(--font-display);
  font-weight: 500;
  font-size: 1.2rem;
  color: var(--c-text-100);
  font-variant-numeric: tabular-nums;
}

.sea-hud .event-height {
  font-size: 0.78rem;
  color: var(--c-text-300);
  font-variant-numeric: tabular-nums;
}