/* Release Note Generator — Common styles
 * Minimal, typography-first, consistent across LP/App/Result
 */

:root {
  --bg: #0b0d10;
  --bg-elev: #14181c;
  --bg-elev-2: #1a2026;
  --fg: #e8ecf1;
  --fg-muted: #8b96a3;
  --fg-subtle: #5c6672;
  --accent: #7dd3fc;
  --accent-strong: #38bdf8;
  --accent-fg: #0b0d10;
  --border: #242a31;
  --success: #86efac;
  --danger: #fca5a5;
  --warn: #fcd34d;
  --radius: 10px;
  --radius-sm: 6px;
  --shadow: 0 1px 3px rgba(0, 0, 0, 0.3), 0 10px 40px rgba(0, 0, 0, 0.3);
  --font-sans:
    -apple-system, BlinkMacSystemFont, 'Inter', 'Hiragino Kaku Gothic ProN',
    'Noto Sans JP', 'Segoe UI', Roboto, sans-serif;
  --font-mono: 'JetBrains Mono', 'SF Mono', Consolas, 'Courier New', monospace;
  --max-w: 1080px;
}

* {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  padding: 0;
  background: var(--bg);
  color: var(--fg);
  font-family: var(--font-sans);
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

a {
  color: var(--accent);
  text-decoration: none;
  transition: color 0.15s;
}
a:hover {
  color: var(--accent-strong);
  text-decoration: underline;
}

h1,
h2,
h3,
h4 {
  margin: 0 0 0.6em;
  line-height: 1.25;
  font-weight: 700;
  letter-spacing: -0.01em;
}

h1 {
  font-size: clamp(2rem, 4vw + 1rem, 3.4rem);
}

h2 {
  font-size: clamp(1.5rem, 2vw + 1rem, 2.2rem);
}

h3 {
  font-size: 1.2rem;
}

p {
  margin: 0 0 1em;
  color: var(--fg);
}

.muted {
  color: var(--fg-muted);
}

/* Header */
.site-header {
  position: sticky;
  top: 0;
  background: rgba(11, 13, 16, 0.85);
  backdrop-filter: saturate(180%) blur(10px);
  border-bottom: 1px solid var(--border);
  z-index: 10;
}

.header-inner {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 14px 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  color: var(--fg);
  font-weight: 700;
  font-size: 1.05rem;
}
.brand:hover {
  color: var(--fg);
  text-decoration: none;
}

.brand-mark {
  width: 28px;
  height: 28px;
  display: grid;
  place-items: center;
  background: linear-gradient(135deg, var(--accent) 0%, #a855f7 100%);
  border-radius: var(--radius-sm);
  color: var(--accent-fg);
  font-weight: 900;
  font-size: 0.85rem;
}

.lang-switch {
  display: flex;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  overflow: hidden;
}
.lang-switch button {
  background: transparent;
  border: 0;
  padding: 6px 12px;
  color: var(--fg-muted);
  font-size: 0.85rem;
  font-family: var(--font-mono);
  cursor: pointer;
  transition: background 0.15s, color 0.15s;
}
.lang-switch button.active {
  background: var(--accent);
  color: var(--accent-fg);
}
.lang-switch button:hover:not(.active) {
  color: var(--fg);
  background: var(--bg-elev-2);
}

/* Layout */
.container {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 0 24px;
}

section {
  padding: 80px 0;
}

/* Hero */
.hero {
  padding-top: 100px;
  padding-bottom: 100px;
  text-align: center;
}

.hero .eyebrow {
  display: inline-block;
  color: var(--accent);
  font-family: var(--font-mono);
  font-size: 0.85rem;
  letter-spacing: 0.05em;
  margin-bottom: 1rem;
  padding: 4px 12px;
  border: 1px solid var(--border);
  border-radius: 999px;
  background: var(--bg-elev);
}

.hero h1 {
  max-width: 780px;
  margin: 0.4em auto 0.5em;
}

.hero .sub {
  max-width: 640px;
  margin: 0 auto 2em;
  font-size: 1.1rem;
  color: var(--fg-muted);
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 22px;
  border-radius: var(--radius);
  font-weight: 600;
  font-size: 1rem;
  border: 1px solid transparent;
  cursor: pointer;
  transition: transform 0.1s, background 0.15s, color 0.15s, border-color 0.15s;
  font-family: inherit;
  text-decoration: none;
}
.btn:hover {
  text-decoration: none;
  transform: translateY(-1px);
}
.btn:active {
  transform: translateY(0);
}

.btn-primary {
  background: var(--accent);
  color: var(--accent-fg);
}
.btn-primary:hover {
  background: var(--accent-strong);
  color: var(--accent-fg);
}

.btn-ghost {
  background: transparent;
  color: var(--fg);
  border-color: var(--border);
}
.btn-ghost:hover {
  background: var(--bg-elev);
  color: var(--fg);
}

.btn[disabled] {
  opacity: 0.55;
  cursor: not-allowed;
  transform: none;
}

/* Cards */
.card {
  background: var(--bg-elev);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 28px;
  transition: border-color 0.15s;
}
.card:hover {
  border-color: var(--accent);
}

.grid-3 {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}

@media (max-width: 760px) {
  .grid-3 {
    grid-template-columns: 1fr;
  }
  section {
    padding: 50px 0;
  }
  .hero {
    padding-top: 60px;
    padding-bottom: 60px;
  }
}

.feature-icon {
  font-family: var(--font-mono);
  color: var(--accent);
  font-size: 1.8rem;
  margin-bottom: 10px;
}

/* Steps */
.steps {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
  counter-reset: step;
}
.step {
  position: relative;
  padding-left: 50px;
}
.step::before {
  counter-increment: step;
  content: counter(step);
  position: absolute;
  left: 0;
  top: 0;
  width: 36px;
  height: 36px;
  border-radius: 50%;
  background: var(--accent);
  color: var(--accent-fg);
  display: grid;
  place-items: center;
  font-weight: 800;
  font-family: var(--font-mono);
}
@media (max-width: 760px) {
  .steps {
    grid-template-columns: 1fr;
  }
}

/* Pricing */
.pricing {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
  max-width: 820px;
  margin: 0 auto;
}
@media (max-width: 760px) {
  .pricing {
    grid-template-columns: 1fr;
  }
}

.plan {
  background: var(--bg-elev);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 32px;
}
.plan.featured {
  border-color: var(--accent);
  position: relative;
}
.plan.featured::before {
  content: 'RECOMMENDED';
  position: absolute;
  top: -10px;
  right: 20px;
  background: var(--accent);
  color: var(--accent-fg);
  font-family: var(--font-mono);
  font-size: 0.7rem;
  padding: 3px 10px;
  border-radius: 999px;
  font-weight: 700;
  letter-spacing: 0.05em;
}
.plan h3 {
  margin-bottom: 0.2em;
}
.plan .price {
  font-size: 2rem;
  font-weight: 800;
  margin: 10px 0;
}
.plan .price .per {
  font-size: 1rem;
  font-weight: 400;
  color: var(--fg-muted);
}
.plan ul {
  list-style: none;
  padding: 0;
  margin: 20px 0;
}
.plan li {
  padding: 6px 0;
  color: var(--fg-muted);
  border-bottom: 1px dashed var(--border);
}
.plan li::before {
  content: '✓ ';
  color: var(--success);
  margin-right: 6px;
}

/* FAQ */
.faq-item {
  border-bottom: 1px solid var(--border);
  padding: 20px 0;
}
.faq-item:last-child {
  border-bottom: 0;
}
.faq-item h3 {
  margin-bottom: 0.4em;
  font-size: 1.05rem;
}
.faq-item p {
  color: var(--fg-muted);
  margin: 0;
}

/* Footer */
.site-footer {
  border-top: 1px solid var(--border);
  padding: 40px 0;
  color: var(--fg-subtle);
  font-size: 0.9rem;
  text-align: center;
}
.site-footer a {
  color: var(--fg-muted);
  margin: 0 10px;
}

/* ========== App画面 ========== */
.app-shell {
  min-height: 100vh;
  padding: 40px 24px 80px;
}

.app-wrap {
  max-width: 900px;
  margin: 0 auto;
}

.app-header-sub {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 30px;
}

.quota-pill {
  font-family: var(--font-mono);
  font-size: 0.85rem;
  color: var(--fg-muted);
  padding: 6px 14px;
  background: var(--bg-elev);
  border: 1px solid var(--border);
  border-radius: 999px;
}

.form-card {
  background: var(--bg-elev);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 32px;
}

.form-row {
  margin-bottom: 18px;
}

.form-row label {
  display: block;
  margin-bottom: 6px;
  color: var(--fg-muted);
  font-size: 0.85rem;
  font-weight: 500;
}

.form-row input,
.form-row select {
  width: 100%;
  padding: 12px 14px;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  color: var(--fg);
  font-family: var(--font-mono);
  font-size: 0.92rem;
  transition: border-color 0.15s;
}
.form-row input:focus,
.form-row select:focus {
  outline: 0;
  border-color: var(--accent);
}

.form-row .hint {
  margin-top: 4px;
  font-size: 0.78rem;
  color: var(--fg-subtle);
}

.form-row-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
}

.form-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  margin-top: 24px;
}

.checkbox-row {
  display: flex;
  align-items: center;
  gap: 8px;
  color: var(--fg-muted);
  font-size: 0.85rem;
}

/* Loading */
.loading-stage {
  display: none;
  margin-top: 24px;
  padding: 20px;
  background: var(--bg-elev-2);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  font-family: var(--font-mono);
  color: var(--fg-muted);
  font-size: 0.9rem;
}
.loading-stage.active {
  display: block;
}
.loading-stage .stage {
  opacity: 0.4;
  transition: opacity 0.2s, color 0.2s;
}
.loading-stage .stage.active {
  opacity: 1;
  color: var(--accent);
}
.loading-stage .stage.done {
  opacity: 0.7;
  color: var(--success);
}

/* Error / Toast */
.toast {
  margin-top: 16px;
  padding: 14px 18px;
  border-radius: var(--radius);
  background: #2a1818;
  border: 1px solid #5a2828;
  color: var(--danger);
  font-size: 0.9rem;
  display: none;
}
.toast.show {
  display: block;
}

/* Result view */
.result-wrap {
  display: none;
  margin-top: 30px;
}
.result-wrap.show {
  display: block;
}

.result-meta {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
  color: var(--fg-muted);
  font-size: 0.85rem;
  font-family: var(--font-mono);
  margin-bottom: 16px;
  padding: 12px 16px;
  background: var(--bg-elev);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
}

.result-tabs {
  display: flex;
  border-bottom: 1px solid var(--border);
  margin-bottom: 20px;
}
.result-tabs button {
  background: transparent;
  border: 0;
  padding: 12px 20px;
  color: var(--fg-muted);
  cursor: pointer;
  font-family: var(--font-mono);
  font-size: 0.9rem;
  border-bottom: 2px solid transparent;
  transition: color 0.15s, border-color 0.15s;
}
.result-tabs button.active {
  color: var(--accent);
  border-bottom-color: var(--accent);
}
.result-tabs button:hover:not(.active) {
  color: var(--fg);
}

.result-content {
  background: var(--bg-elev);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 24px 28px;
  margin-bottom: 16px;
  max-height: 600px;
  overflow-y: auto;
}

.result-content pre {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 0.85rem;
  white-space: pre-wrap;
  word-break: break-word;
  color: var(--fg);
  line-height: 1.6;
}

.result-actions {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
}

/* prefers-reduced-motion */
@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    transition-duration: 0.01ms !important;
  }
}