/* revenue-kun LP v0.1 — style.css */

/* ── Variables ─────────────────────────────────────────── */
:root {
  --c-bg:           #f8fafc;
  --c-surface:      #ffffff;
  --c-primary:      #1a4731;
  --c-primary-mid:  #2d6a4f;
  --c-primary-lt:   #e8f5ee;
  --c-accent:       #52b788;
  --c-text:         #0f172a;
  --c-muted:        #475569;
  --c-border:       #e2e8f0;
  --c-code-bg:      #1e293b;
  --c-code-text:    #e2e8f0;
  --c-warn:         #b91c1c;
  --c-warn-bg:      #fef2f2;
  --c-warn-border:  #fca5a5;
  --c-limit-bg:     #fffbeb;
  --c-limit-border: #fcd34d;
  --c-user-row:     #f0fdf4;
  --c-vacant-row:   #fefce8;
  --c-total-row:    #f0f9ff;

  --radius:     8px;
  --radius-sm:  4px;
  --shadow:     0 2px 8px rgba(0,0,0,0.08);
  --shadow-md:  0 4px 16px rgba(0,0,0,0.10);
  --max-w:      960px;
}

/* ── Reset ──────────────────────────────────────────────── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "Hiragino Sans",
               "Hiragino Kaku Gothic ProN", "Noto Sans JP", sans-serif;
  background: var(--c-bg);
  color: var(--c-text);
  line-height: 1.7;
  font-size: 16px;
}
a { color: var(--c-primary); text-decoration: none; }
a:hover { text-decoration: underline; }
img { max-width: 100%; height: auto; }

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

.section {
  padding: 64px 0;
}

.section h2 {
  font-size: 1.75rem;
  font-weight: 700;
  color: var(--c-primary);
  margin-bottom: 32px;
  letter-spacing: -0.01em;
}

.section-sub {
  color: var(--c-muted);
  margin-bottom: 28px;
  font-size: 0.92rem;
}

/* ── Site Header ─────────────────────────────────────────── */
.site-header {
  background: var(--c-primary);
  color: #fff;
  padding: 14px 0;
  position: sticky;
  top: 0;
  z-index: 100;
  box-shadow: 0 2px 8px rgba(0,0,0,0.2);
}

.site-header .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.logo {
  font-size: 1.1rem;
  font-weight: 700;
  letter-spacing: 0.04em;
  color: #fff;
}

.nav-link {
  color: rgba(255,255,255,0.85);
  font-size: 0.9rem;
  font-weight: 500;
  transition: color 0.15s;
}
.nav-link:hover { color: #fff; text-decoration: none; }

/* ── Hero ────────────────────────────────────────────────── */
.hero {
  background: linear-gradient(135deg, var(--c-primary) 0%, var(--c-primary-mid) 100%);
  color: #fff;
  padding: 80px 0 72px;
}

.hero-badge {
  display: flex;
  gap: 8px;
  margin-bottom: 24px;
  flex-wrap: wrap;
}

.badge {
  display: inline-block;
  padding: 3px 10px;
  border-radius: 20px;
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.04em;
}

.badge-oss     { background: rgba(255,255,255,0.20); color: #fff; }
.badge-license { background: rgba(255,255,255,0.15); color: rgba(255,255,255,0.9); }
.badge-version { background: var(--c-accent); color: #fff; }

.hero-headline {
  font-size: clamp(1.6rem, 4vw, 2.4rem);
  font-weight: 800;
  line-height: 1.35;
  letter-spacing: -0.02em;
  margin-bottom: 20px;
}

.hero-sub {
  font-size: 0.97rem;
  color: rgba(255,255,255,0.82);
  margin-bottom: 24px;
  max-width: 640px;
  line-height: 1.8;
}

.hero-sub-en {
  display: block;
  margin-top: 0.5rem;
  font-size: 0.82rem;
  color: rgba(255,255,255,0.7);
}

.warn-badge {
  display: inline-flex;
  align-items: flex-start;
  gap: 8px;
  background: rgba(255,255,255,0.12);
  border: 1px solid rgba(255,255,255,0.3);
  border-radius: var(--radius);
  padding: 10px 16px;
  font-size: 0.85rem;
  color: rgba(255,255,255,0.92);
  margin-bottom: 28px;
  max-width: 620px;
  line-height: 1.6;
}

.warn-icon { font-size: 1rem; flex-shrink: 0; margin-top: 1px; }

.hero-cta {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
}

/* ── Buttons ─────────────────────────────────────────────── */
.btn {
  display: inline-block;
  padding: 11px 24px;
  border-radius: var(--radius);
  font-size: 0.92rem;
  font-weight: 600;
  transition: opacity 0.15s, transform 0.1s;
  cursor: pointer;
}

.btn:hover { opacity: 0.88; text-decoration: none; transform: translateY(-1px); }

.btn-primary {
  background: #fff;
  color: var(--c-primary);
}

.btn-secondary {
  background: rgba(255,255,255,0.15);
  color: #fff;
  border: 1px solid rgba(255,255,255,0.4);
}

.btn-outline {
  background: transparent;
  color: var(--c-primary);
  border: 2px solid var(--c-primary);
}

/* ── Problem ─────────────────────────────────────────────── */
.section-problem {
  background: var(--c-surface);
}

.problem-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 20px;
}

.problem-card {
  background: var(--c-bg);
  border: 1px solid var(--c-border);
  border-radius: var(--radius);
  padding: 24px;
  text-align: center;
}

.problem-icon {
  font-size: 2rem;
  margin-bottom: 12px;
}

.problem-card p {
  font-size: 0.9rem;
  color: var(--c-muted);
  line-height: 1.65;
}

/* ── Feature table ───────────────────────────────────────── */
.section-features {
  background: var(--c-bg);
}

.feature-table {
  width: 100%;
  border-collapse: collapse;
  background: var(--c-surface);
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--shadow);
}

.feature-table th,
.feature-table td {
  padding: 12px 20px;
  font-size: 0.9rem;
  text-align: left;
  border-bottom: 1px solid var(--c-border);
}

.feature-table thead th {
  background: var(--c-primary);
  color: #fff;
  font-weight: 600;
  font-size: 0.85rem;
  letter-spacing: 0.03em;
}

.feature-table tbody tr:last-child td { border-bottom: none; }
.feature-table tbody tr:hover { background: var(--c-primary-lt); }

.feature-table code {
  background: var(--c-bg);
  padding: 2px 6px;
  border-radius: 3px;
  font-size: 0.82rem;
  font-family: "SFMono-Regular", Consolas, "Liberation Mono", Menlo, monospace;
  color: var(--c-primary);
}

/* ── Demo ────────────────────────────────────────────────── */
.section-demo {
  background: var(--c-surface);
}

.label-synth {
  font-size: 0.7rem;
  font-weight: 600;
  background: var(--c-accent);
  color: var(--c-primary);
  padding: 2px 8px;
  border-radius: 20px;
  letter-spacing: 0.04em;
  vertical-align: middle;
  margin-left: 8px;
}

.code-block {
  background: var(--c-code-bg);
  border-radius: var(--radius);
  overflow: hidden;
  margin-bottom: 36px;
  box-shadow: var(--shadow-md);
}

.code-header {
  background: rgba(255,255,255,0.06);
  color: rgba(255,255,255,0.5);
  font-size: 0.75rem;
  padding: 8px 16px;
  font-family: monospace;
  border-bottom: 1px solid rgba(255,255,255,0.08);
}

.code-block pre {
  padding: 20px 24px;
  overflow-x: auto;
}

.code-block code {
  color: var(--c-code-text);
  font-family: "SFMono-Regular", Consolas, "Liberation Mono", Menlo, monospace;
  font-size: 0.85rem;
  line-height: 1.75;
  white-space: pre;
}

.sheet-tabs-label {
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--c-muted);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin-bottom: 16px;
}

.sheet-cards {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 20px;
}

.sheet-card {
  background: var(--c-bg);
  border: 1px solid var(--c-border);
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--shadow);
}

.sheet-tab {
  background: var(--c-primary);
  color: #fff;
  padding: 10px 16px;
  font-size: 0.78rem;
  font-weight: 600;
  font-family: "SFMono-Regular", Consolas, "Liberation Mono", Menlo, monospace;
  letter-spacing: 0.01em;
  border-bottom: 3px solid var(--c-accent);
}

.sheet-body {
  padding: 16px;
}

.sheet-desc {
  font-size: 0.82rem;
  color: var(--c-muted);
  margin-bottom: 12px;
  line-height: 1.65;
}

.sheet-desc code {
  background: var(--c-primary-lt);
  color: var(--c-primary);
  padding: 1px 5px;
  border-radius: 3px;
  font-size: 0.78rem;
  font-family: "SFMono-Regular", Consolas, "Liberation Mono", Menlo, monospace;
}

.mini-sheet {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.76rem;
}

.mini-sheet th,
.mini-sheet td {
  padding: 5px 8px;
  border: 1px solid var(--c-border);
  vertical-align: top;
}

.mini-sheet thead th {
  background: var(--c-primary);
  color: #fff;
  font-weight: 600;
}

.mini-sheet .user-row   { background: var(--c-user-row); }
.mini-sheet .vacant-row { background: var(--c-vacant-row); }
.mini-sheet .total-row  { background: var(--c-total-row); font-weight: 600; }

.table-scroll {
  overflow-x: auto;
}

.browser-chrome {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 8px 12px;
  background: #e8e8e8;
  border-bottom: 1px solid var(--c-border);
}
.browser-chrome .dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  display: inline-block;
}
.browser-chrome .dot-r { background: #ff5f56; }
.browser-chrome .dot-y { background: #ffbd2e; }
.browser-chrome .dot-g { background: #27c93f; }
.browser-chrome .url-bar {
  flex: 1;
  background: #fff;
  border: 1px solid var(--c-border);
  border-radius: 4px;
  padding: 3px 10px;
  font-size: 0.75rem;
  color: var(--c-muted);
  font-family: "SFMono-Regular", Consolas, "Liberation Mono", Menlo, monospace;
}

/* ── Workflow ─────────────────────────────────────────────── */
.section-workflow {
  background: var(--c-bg);
}

.workflow-steps {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0;
  max-width: 680px;
}

.workflow-steps li {
  display: flex;
  align-items: flex-start;
  gap: 16px;
  padding: 20px 0;
  position: relative;
}

.workflow-steps li + li {
  border-top: 1px solid var(--c-border);
}

.step-num {
  flex-shrink: 0;
  width: 36px;
  height: 36px;
  background: var(--c-primary);
  color: #fff;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 0.9rem;
  margin-top: 2px;
}

.workflow-steps li div {
  font-size: 0.92rem;
  line-height: 1.7;
  color: var(--c-text);
}

.workflow-steps li div strong { color: var(--c-primary); }

.workflow-steps code {
  background: var(--c-primary-lt);
  color: var(--c-primary);
  padding: 1px 6px;
  border-radius: 3px;
  font-size: 0.82rem;
  font-family: "SFMono-Regular", Consolas, "Liberation Mono", Menlo, monospace;
}

/* ── Edit cards ───────────────────────────────────────────── */
.section-edit {
  background: var(--c-surface);
}

.edit-cards {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 20px;
}

.edit-card {
  background: var(--c-primary-lt);
  border: 1px solid var(--c-accent);
  border-radius: var(--radius);
  padding: 24px;
}

.edit-card h3 {
  font-size: 0.85rem;
  font-weight: 700;
  font-family: "SFMono-Regular", Consolas, "Liberation Mono", Menlo, monospace;
  color: var(--c-primary);
  margin-bottom: 14px;
  padding-bottom: 10px;
  border-bottom: 1px solid var(--c-accent);
}

.edit-card ul {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.edit-card li {
  font-size: 0.85rem;
  color: var(--c-muted);
  padding-left: 14px;
  position: relative;
}

.edit-card li::before {
  content: "›";
  position: absolute;
  left: 0;
  color: var(--c-accent);
  font-weight: 700;
}

/* ── claude.ai / Cowork Skill ────────────────────────────── */
.section-claude {
  background: var(--c-primary-lt);
  border-top: 3px solid var(--c-accent);
}

.section-claude h2 {
  color: var(--c-primary);
}

.claude-cards {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 24px;
  margin-top: 1.5rem;
}

.claude-card {
  background: var(--c-surface);
  border: 1px solid var(--c-accent);
  border-radius: var(--radius);
  padding: 28px;
  box-shadow: var(--shadow);
}

.claude-card-icon {
  font-size: 2rem;
  margin-bottom: 0.75rem;
}

.claude-card h3 {
  font-size: 1rem;
  font-weight: 700;
  color: var(--c-primary);
  margin-bottom: 0.75rem;
}

.claude-card p {
  font-size: 0.9rem;
  color: var(--c-muted);
}

.section-note {
  margin-top: 1.5rem;
  font-size: 0.82rem;
  color: var(--c-muted);
  padding: 10px 16px;
  background: var(--c-surface);
  border-radius: var(--radius-sm);
  border-left: 3px solid var(--c-accent);
}

/* ── Limitations ──────────────────────────────────────────── */
.section-limitations {
  background: var(--c-limit-bg);
  border-top: 3px solid var(--c-limit-border);
  border-bottom: 3px solid var(--c-limit-border);
}

.section-limitations h2 {
  color: #92400e;
}

.limits-table {
  width: 100%;
  border-collapse: collapse;
  background: var(--c-surface);
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--shadow);
}

.limits-table th,
.limits-table td {
  padding: 12px 20px;
  font-size: 0.88rem;
  text-align: left;
  border-bottom: 1px solid var(--c-border);
  vertical-align: top;
  line-height: 1.6;
}

.limits-table thead th {
  background: #92400e;
  color: #fff;
  font-weight: 600;
  font-size: 0.82rem;
  letter-spacing: 0.03em;
}

.limits-table tbody td:first-child {
  font-weight: 600;
  color: #78350f;
  width: 36%;
  white-space: nowrap;
}

.limits-table tbody tr:last-child td { border-bottom: none; }
.limits-table tbody tr:hover { background: var(--c-limit-bg); }

.limits-table a { color: var(--c-primary); }

.limits-table code {
  background: var(--c-bg);
  padding: 1px 5px;
  border-radius: 3px;
  font-size: 0.8rem;
  font-family: "SFMono-Regular", Consolas, "Liberation Mono", Menlo, monospace;
}

/* ── CTA Section ──────────────────────────────────────────── */
.section-cta {
  background: var(--c-bg);
}

.cta-cards {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 20px;
}

.cta-card {
  background: var(--c-surface);
  border: 1px solid var(--c-border);
  border-radius: var(--radius);
  padding: 28px 24px;
  box-shadow: var(--shadow);
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.cta-card h3 {
  font-size: 1rem;
  font-weight: 700;
  color: var(--c-primary);
}

.cta-card p {
  font-size: 0.86rem;
  color: var(--c-muted);
  line-height: 1.65;
  flex: 1;
}

.cta-card code {
  background: var(--c-bg);
  padding: 1px 5px;
  border-radius: 3px;
  font-size: 0.79rem;
  font-family: "SFMono-Regular", Consolas, "Liberation Mono", Menlo, monospace;
  color: var(--c-primary);
}

.cta-card .btn { align-self: flex-start; margin-top: 4px; }

/* ── Disclaimer ───────────────────────────────────────────── */
.section-disclaimer {
  background: var(--c-warn-bg);
  border-top: 3px solid var(--c-warn-border);
}

.section-disclaimer h2 {
  color: var(--c-warn);
}

.disclaimer-box {
  background: var(--c-surface);
  border: 1px solid var(--c-warn-border);
  border-radius: var(--radius);
  padding: 28px 32px;
  box-shadow: var(--shadow);
}

.disclaimer-box p {
  font-size: 0.88rem;
  line-height: 1.85;
  color: var(--c-text);
}

.disclaimer-box p em {
  color: var(--c-muted);
}

.disclaimer-box hr {
  border: none;
  border-top: 1px solid var(--c-border);
  margin: 20px 0;
}

/* ── Footer ───────────────────────────────────────────────── */
.site-footer {
  background: var(--c-primary);
  color: rgba(255,255,255,0.7);
  padding: 28px 0;
  text-align: center;
}

.site-footer p { font-size: 0.82rem; line-height: 2; }
.site-footer a { color: rgba(255,255,255,0.85); }
.site-footer a:hover { color: #fff; }
.footer-issues { font-size: 0.75rem; color: rgba(255,255,255,0.45); }

/* ── Responsive ───────────────────────────────────────────── */
@media (max-width: 640px) {
  .hero { padding: 56px 0 52px; }
  .hero-headline { font-size: 1.45rem; }
  .hero-sub { font-size: 0.9rem; }
  .section { padding: 48px 0; }
  .section h2 { font-size: 1.4rem; }
  .hero-cta { flex-direction: column; }
  .btn { text-align: center; }
  .limits-table tbody td:first-child { white-space: normal; }
  .disclaimer-box { padding: 20px; }
}