:root {
  color: #241d18;
  background: #f3eee7;
  font-family:
    Inter, "Hiragino Kaku Gothic ProN", "Yu Gothic", "YuGothic", Meiryo, sans-serif;
  font-synthesis: none;
  --ink: #241d18;
  --muted: #71665c;
  --paper: #fffdf9;
  --line: #ddd2c6;
  --accent: #176b70;
  --accent-dark: #0f5054;
  --record: #bb3030;
  --record-dark: #8e2020;
  --warning-bg: #fff5d9;
  --warning-line: #e4bd5b;
  --danger-bg: #fff0ee;
  --danger-line: #d46b60;
  --success-bg: #e9f7ef;
  --success-line: #66a77d;
  line-height: 1.6;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-width: 320px;
  min-height: 100vh;
  background:
    radial-gradient(circle at top right, rgb(23 107 112 / 12%), transparent 34rem),
    #f3eee7;
}

button,
a {
  -webkit-tap-highlight-color: transparent;
}

button {
  font: inherit;
}

.shell {
  width: min(100% - 2rem, 70rem);
  margin-inline: auto;
  padding: 3rem 0 2rem;
}

.hero {
  max-width: 48rem;
  margin-bottom: 2rem;
}

.eyebrow,
.step {
  margin: 0 0 0.35rem;
  color: var(--accent);
  font-size: 0.75rem;
  font-weight: 800;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

h1,
h2,
h3,
p {
  margin-top: 0;
}

h1 {
  margin-bottom: 0.65rem;
  font-family: Georgia, "Yu Mincho", "YuMincho", serif;
  font-size: clamp(2.35rem, 8vw, 4.75rem);
  font-weight: 500;
  letter-spacing: -0.04em;
  line-height: 1.06;
}

h2 {
  margin-bottom: 0;
  font-size: clamp(1.25rem, 3vw, 1.65rem);
  line-height: 1.3;
}

h3 {
  margin-bottom: 1rem;
  font-size: 1rem;
}

.lead {
  max-width: 42rem;
  margin-bottom: 0;
  color: var(--muted);
  font-size: 1.05rem;
}

.notice,
.status,
.panel {
  border: 1px solid var(--line);
  border-radius: 1rem;
  background: var(--paper);
  box-shadow: 0 0.9rem 2.6rem rgb(61 45 32 / 6%);
}

.notice {
  margin-bottom: 1rem;
  padding: 1.1rem 1.25rem;
  border-color: var(--warning-line);
  background: var(--warning-bg);
}

.notice h2 {
  margin-bottom: 0.35rem;
  font-size: 1rem;
}

.notice ul {
  margin: 0;
  padding-left: 1.3rem;
}

.status {
  margin-bottom: 1rem;
  padding: 0.85rem 1rem;
  color: var(--muted);
  font-weight: 700;
}

.status[data-tone="success"] {
  border-color: var(--success-line);
  color: #275e3a;
  background: var(--success-bg);
}

.status[data-tone="error"] {
  border-color: var(--danger-line);
  color: #852c24;
  background: var(--danger-bg);
}

.panel {
  margin-bottom: 1.25rem;
  padding: clamp(1rem, 3vw, 1.5rem);
}

.section-heading {
  display: flex;
  gap: 1rem;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 1rem;
}

.video-frame {
  position: relative;
  overflow: hidden;
  aspect-ratio: 16 / 9;
  border-radius: 0.75rem;
  background: #161311;
}

.video-frame video {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: contain;
}

.video-placeholder {
  position: absolute;
  inset: 50% auto auto 50%;
  width: min(28rem, calc(100% - 2rem));
  margin: 0;
  color: #d8d1cb;
  text-align: center;
  transform: translate(-50%, -50%);
}

.recording-badge {
  flex: none;
  padding: 0.4rem 0.7rem;
  border-radius: 999px;
  color: #fff;
  background: var(--record);
  font-size: 0.85rem;
  font-variant-numeric: tabular-nums;
  font-weight: 800;
}

.recording-dot {
  display: inline-block;
  width: 0.55rem;
  height: 0.55rem;
  margin-right: 0.25rem;
  border-radius: 50%;
  background: #fff;
  animation: pulse 1s ease-in-out infinite;
}

@keyframes pulse {
  50% {
    opacity: 0.35;
  }
}

.button-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.65rem;
  margin-top: 1rem;
}

.button {
  min-height: 2.9rem;
  padding: 0.65rem 1rem;
  border: 1px solid var(--line);
  border-radius: 0.7rem;
  color: var(--ink);
  background: #f9f5ef;
  cursor: pointer;
  font-weight: 800;
  text-align: center;
  text-decoration: none;
  transition:
    transform 120ms ease,
    background 120ms ease,
    border-color 120ms ease;
}

.button:hover:not(:disabled) {
  transform: translateY(-1px);
}

.button:focus-visible {
  outline: 3px solid rgb(23 107 112 / 32%);
  outline-offset: 2px;
}

.button:disabled {
  cursor: not-allowed;
  opacity: 0.45;
}

.button-primary {
  border-color: var(--accent);
  color: #fff;
  background: var(--accent);
}

.button-primary:hover:not(:disabled) {
  background: var(--accent-dark);
}

.button-record {
  border-color: var(--record);
  color: #fff;
  background: var(--record);
}

.button-record:hover:not(:disabled) {
  background: var(--record-dark);
}

.button-quiet {
  background: transparent;
}

.help-text {
  margin: 0.75rem 0 0;
  color: var(--muted);
  font-size: 0.9rem;
}

.condition-columns {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 0.8rem;
}

.condition-card {
  padding: 1rem;
  border: 1px solid var(--line);
  border-radius: 0.75rem;
  background: #faf7f2;
}

.data-list {
  margin: 0;
}

.data-list div {
  display: grid;
  grid-template-columns: minmax(7rem, 42%) 1fr;
  gap: 0.75rem;
  padding: 0.55rem 0;
  border-top: 1px solid var(--line);
}

.data-list dt {
  color: var(--muted);
  font-size: 0.85rem;
}

.data-list dd {
  margin: 0;
  overflow-wrap: anywhere;
  font-size: 0.9rem;
  font-weight: 700;
}

footer {
  padding-top: 0.75rem;
  color: var(--muted);
  font-size: 0.85rem;
  text-align: center;
}

@media (max-width: 52rem) {
  .condition-columns {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 38rem) {
  .shell {
    width: min(100% - 1rem, 70rem);
    padding-top: 1.5rem;
  }

  .button-row {
    display: grid;
    grid-template-columns: 1fr;
  }

  .section-heading {
    align-items: flex-start;
  }

  .video-frame {
    aspect-ratio: 4 / 3;
  }
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    scroll-behavior: auto !important;
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}