:root {
  color-scheme: light;
  --ink: #17201e;
  --muted: #63706d;
  --line: #d8e1de;
  --paper: #eaf0ec;
  --panel: #ffffff;
  --deep: #173a3c;
  --water: #2d6d74;
  --clay: #9b604b;
  --signal: #d49a3a;
  --danger: #8d3f43;
  --shadow: 0 18px 44px rgba(23, 32, 30, 0.14);
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  background:
    linear-gradient(180deg, rgba(234, 240, 236, 0.84), rgba(234, 240, 236, 1)),
    radial-gradient(circle at 50% -10%, rgba(212, 154, 58, 0.24), transparent 42%),
    var(--paper);
  color: var(--ink);
  font-family: ui-serif, Georgia, Cambria, "Times New Roman", serif;
}

button,
input,
textarea {
  font: inherit;
}

button {
  cursor: pointer;
}

.app-shell {
  width: min(100%, 760px);
  margin: 0 auto;
  padding: 18px 14px 98px;
}

.topbar,
.section-heading {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 12px;
}

.eyebrow {
  margin: 0 0 7px;
  color: var(--water);
  font-size: 0.78rem;
  font-weight: 900;
  letter-spacing: 0;
  text-transform: uppercase;
}

h1,
h2,
p {
  margin-top: 0;
}

h1 {
  margin-bottom: 0;
  font-size: 1.75rem;
  line-height: 1.04;
  letter-spacing: 0;
}

h2 {
  margin-bottom: 10px;
  font-size: 1.45rem;
  line-height: 1.08;
}

.icon-button {
  flex: 0 0 auto;
  min-height: 42px;
  border: 1px solid var(--line);
  border-radius: 999px;
  padding: 8px 12px;
  background: #fff;
  color: var(--deep);
  font-weight: 850;
}

.safety-strip {
  display: grid;
  gap: 4px;
  margin: 16px 0;
  border: 1px solid rgba(141, 63, 67, 0.32);
  border-radius: 8px;
  padding: 12px;
  background: #fff8f6;
  color: var(--danger);
  font-size: 0.9rem;
}

.screen {
  display: none;
}

.screen.active {
  display: block;
}

.harbor-visual {
  position: relative;
  min-height: 180px;
  overflow: hidden;
  border-radius: 8px;
  margin-bottom: 14px;
  background:
    linear-gradient(180deg, rgba(14, 48, 54, 0.18), rgba(14, 48, 54, 0.8)),
    url("/harbor/assets/harbor-mark.svg") center / cover,
    var(--deep);
  box-shadow: var(--shadow);
}

.light-beam {
  position: absolute;
  left: 50%;
  top: 24px;
  width: 40%;
  height: 160px;
  transform: translateX(-50%);
  background: linear-gradient(180deg, rgba(255, 238, 179, 0.72), rgba(255, 238, 179, 0));
  clip-path: polygon(44% 0, 56% 0, 100% 100%, 0 100%);
  animation: beam 4s ease-in-out infinite;
}

.waterline {
  position: absolute;
  right: 0;
  bottom: 34px;
  left: 0;
  height: 2px;
  background: rgba(255, 255, 255, 0.48);
}

@keyframes beam {
  0%,
  100% {
    opacity: 0.7;
  }
  50% {
    opacity: 1;
  }
}

.emergency-grid,
.choice-grid,
.pause-options,
.tiny-actions,
.signal-list,
.summary-list {
  display: grid;
  gap: 10px;
}

.emergency-grid {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.emergency-button,
.choice span,
.segmented label,
.timer-button,
.signal-button,
.selected-signal,
.summary-item,
.grounding-card,
.flow-panel,
.stabilize-panel,
.summary-panel {
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--panel);
}

.emergency-button {
  min-height: 106px;
  padding: 14px;
  color: #fff;
  text-align: left;
  background: var(--deep);
  box-shadow: var(--shadow);
}

.emergency-button:nth-child(2n) {
  background: var(--water);
}

.emergency-button:nth-child(3n) {
  background: var(--clay);
}

.emergency-button strong {
  display: block;
  font-size: 1.18rem;
  line-height: 1.08;
}

.flow-panel,
.stabilize-panel,
.summary-panel {
  padding: 16px;
}

.dimmed {
  background: #f4f0e8;
}

.quiet {
  background: #f6f8f6;
}

.safety-panel {
  border-color: rgba(141, 63, 67, 0.38);
  background: #fff8f6;
}

.field-label {
  display: block;
  margin: 18px 0 8px;
  color: var(--deep);
  font-size: 0.9rem;
  font-weight: 900;
}

.choice-grid {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.choice-grid.dense {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.choice {
  position: relative;
}

.choice input {
  position: absolute;
  opacity: 0;
}

.choice span,
.segmented label {
  min-height: 50px;
  display: grid;
  place-items: center;
  padding: 10px;
  text-align: center;
  color: var(--ink);
  font-size: 0.92rem;
  font-weight: 850;
}

.choice input:checked + span,
.segmented label:has(input:checked) {
  border-color: var(--water);
  background: #e7f3f1;
  color: var(--deep);
}

.segmented {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 8px;
}

.segmented input {
  position: absolute;
  opacity: 0;
}

textarea {
  width: 100%;
  resize: vertical;
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 12px;
  background: #fbfcfb;
  color: var(--ink);
}

.primary-button,
.timer-button,
.signal-button {
  width: 100%;
  min-height: 54px;
  border: 0;
  border-radius: 8px;
  background: var(--deep);
  color: #fff;
  font-weight: 900;
}

.primary-button {
  margin-top: 16px;
}

.timer-button {
  background: var(--water);
}

.signal-button {
  background: var(--clay);
}

.timer-readout {
  margin: 14px 0;
  font-size: 2.35rem;
  font-weight: 900;
  text-align: center;
}

.grounding-card,
.selected-signal,
.summary-item {
  padding: 13px;
  color: var(--muted);
  line-height: 1.45;
}

.signal-list {
  margin-top: 12px;
}

.return-signal {
  width: 100%;
  min-height: 48px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #fff;
  color: var(--deep);
  font-weight: 850;
}

.bottom-nav {
  position: fixed;
  left: 50%;
  bottom: 14px;
  z-index: 10;
  width: min(calc(100% - 24px), 720px);
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 6px;
  transform: translateX(-50%);
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 6px;
  background: rgba(255, 255, 255, 0.94);
  box-shadow: var(--shadow);
}

.nav-button {
  min-height: 44px;
  border: 0;
  border-radius: 6px;
  background: transparent;
  color: var(--muted);
  font-size: 0.84rem;
  font-weight: 900;
}

.nav-button.active {
  background: var(--deep);
  color: #fff;
}

@media (max-width: 560px) {
  h1 {
    font-size: 1.46rem;
  }

  .emergency-grid,
  .choice-grid,
  .choice-grid.dense,
  .segmented {
    grid-template-columns: 1fr;
  }

  .harbor-visual {
    min-height: 150px;
  }
}