:root {
  --bg: #f7f8fb;
  --panel: #ffffff;
  --text: #172033;
  --muted: #5d677a;
  --line: #dfe5ef;
  --accent: #2f5cff;
  --accent-soft: #eaf0ff;
  --warning: #fff7df;
  --warning-line: #f2d27b;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.75;
}

a {
  color: var(--accent);
  text-decoration: none;
}

a:hover {
  text-decoration: underline;
}

.site-header {
  background: rgba(255, 255, 255, 0.92);
  border-bottom: 1px solid var(--line);
  position: sticky;
  top: 0;
  z-index: 10;
  backdrop-filter: blur(10px);
}

.header-inner,
.main,
.footer-inner {
  width: min(1040px, calc(100% - 32px));
  margin: 0 auto;
}

.header-inner {
  min-height: 64px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}

.brand {
  font-weight: 700;
  letter-spacing: 0.02em;
}

.nav {
  display: flex;
  align-items: center;
  gap: 18px;
  font-size: 14px;
}

.main {
  padding: 64px 0 80px;
}

.hero {
  display: grid;
  grid-template-columns: minmax(0, 1.3fr) minmax(280px, 0.7fr);
  gap: 40px;
  align-items: center;
}

.badge {
  display: inline-flex;
  align-items: center;
  border: 1px solid var(--line);
  background: var(--panel);
  border-radius: 999px;
  padding: 6px 12px;
  font-size: 13px;
  color: var(--muted);
}

h1 {
  margin: 18px 0 16px;
  font-size: clamp(32px, 5vw, 56px);
  line-height: 1.18;
  letter-spacing: -0.04em;
}

h2 {
  margin: 0 0 18px;
  font-size: clamp(24px, 3vw, 34px);
  line-height: 1.32;
  letter-spacing: -0.025em;
}

h3 {
  margin: 0 0 8px;
  font-size: 18px;
}

.lead {
  font-size: 18px;
  color: var(--muted);
  max-width: 720px;
}

.cta-row {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 28px;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 46px;
  padding: 0 18px;
  border-radius: 12px;
  font-weight: 700;
  border: 1px solid var(--accent);
}

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

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

.hero-card,
.card,
.notice {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 24px;
}

.hero-card {
  padding: 24px;
}

.status-list,
.feature-list,
.plain-list {
  margin: 0;
  padding-left: 1.2em;
}

.status-list li,
.feature-list li,
.plain-list li {
  margin: 8px 0;
}

.section {
  margin-top: 72px;
}

.grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 16px;
}

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

.card {
  padding: 24px;
}

.price {
  font-size: 38px;
  line-height: 1;
  font-weight: 800;
  letter-spacing: -0.03em;
  margin: 8px 0;
}

.small {
  font-size: 14px;
  color: var(--muted);
}

.notice {
  padding: 18px 20px;
  background: var(--warning);
  border-color: var(--warning-line);
}

.table-wrap {
  overflow-x: auto;
  border: 1px solid var(--line);
  border-radius: 18px;
  background: var(--panel);
}

table {
  width: 100%;
  border-collapse: collapse;
  min-width: 640px;
}

th,
td {
  padding: 14px 16px;
  border-bottom: 1px solid var(--line);
  text-align: left;
  vertical-align: top;
}

tr:last-child th,
tr:last-child td {
  border-bottom: 0;
}

th {
  width: 220px;
  background: #f3f6fb;
  font-weight: 700;
}

.footer {
  border-top: 1px solid var(--line);
  background: #fff;
  padding: 28px 0;
  color: var(--muted);
  font-size: 14px;
}

.footer-inner {
  display: flex;
  justify-content: space-between;
  gap: 20px;
  flex-wrap: wrap;
}

.footer-links {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
}

@media (max-width: 760px) {
  .header-inner {
    align-items: flex-start;
    flex-direction: column;
    padding: 14px 0;
    gap: 8px;
  }

  .nav {
    width: 100%;
    overflow-x: auto;
    padding-bottom: 4px;
  }

  .hero,
  .grid,
  .grid.two {
    grid-template-columns: 1fr;
  }

  .main {
    padding-top: 40px;
  }

  .section {
    margin-top: 52px;
  }
}

.page-main {
  max-width: 960px;
}

.breadcrumb {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 28px;
  color: var(--muted);
  font-size: 14px;
}

.page-hero {
  max-width: 820px;
}

.readable-card p:first-child {
  margin-top: 0;
}

.readable-card p:last-child {
  margin-bottom: 0;
}

.card-link {
  margin: 14px 0 0;
  font-weight: 700;
}

.step-list {
  list-style: none;
  counter-reset: step;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 16px;
}

.step-list li {
  counter-increment: step;
  position: relative;
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 24px;
  padding: 24px 24px 24px 76px;
}

.step-list li::before {
  content: counter(step);
  position: absolute;
  top: 24px;
  left: 24px;
  width: 34px;
  height: 34px;
  border-radius: 999px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background: var(--accent-soft);
  color: var(--accent);
  font-weight: 800;
}

.step-list p {
  margin: 8px 0 0;
}

.strong-notice h3 {
  margin-bottom: 12px;
}

.inline-code {
  display: inline-block;
  padding: 0 6px;
  border-radius: 6px;
  background: #eef3ff;
  border: 1px solid #d5def5;
  color: #172033;
  font-family: ui-monospace, SFMono-Regular, Consolas, "Liberation Mono", monospace;
  font-size: 0.95em;
}

@media (max-width: 760px) {
  .step-list li {
    padding: 22px;
  }

  .step-list li::before {
    position: static;
    margin-bottom: 12px;
  }
}

/* Gemini API key help v7 */
.compact-section {
  margin-top: 42px;
}

.quick-summary {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 16px;
}

.quick-summary > div,
.limit-box > div {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 20px;
  padding: 18px;
}

.quick-summary strong,
.limit-box strong {
  display: block;
  margin-bottom: 6px;
  color: var(--text);
}

.quick-summary p {
  margin: 0;
  color: var(--muted);
}

.decision-grid .card {
  border-width: 2px;
}

.good-card {
  border-color: #bbd9c4;
  background: #f4fbf6;
}

.caution-card {
  border-color: #f0c7aa;
  background: #fff8f2;
}

.screenshot-card {
  margin: 18px 0 0;
  padding: 16px;
  background: #111827;
  border-radius: 20px;
  border: 1px solid #253044;
}

.screenshot-card img {
  display: block;
  width: 100%;
  height: auto;
  border-radius: 14px;
}

.screenshot-card figcaption {
  margin-top: 10px;
  color: #d6dce8;
  font-size: 13px;
  line-height: 1.7;
}

.limit-box {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 12px;
  margin: 18px 0;
}

.limit-box span {
  display: block;
  color: var(--muted);
  font-size: 14px;
}

@media (max-width: 760px) {
  .quick-summary,
  .limit-box {
    grid-template-columns: 1fr;
  }

  .screenshot-card {
    margin-left: -2px;
    margin-right: -2px;
    padding: 10px;
    border-radius: 16px;
  }
}



/* Gemini API key help v8 */
.free-start-box {
  background: linear-gradient(135deg, #f0fbf5, #f6f9ff);
  border: 2px solid #b8dcc7;
  border-radius: 24px;
  padding: 24px;
  margin-bottom: 18px;
}

.free-start-box h3 {
  margin-top: 0;
}

.free-start-box p:last-child {
  margin-bottom: 0;
}

@media (max-width: 920px) {
  .quick-summary {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (max-width: 760px) {
  .quick-summary {
    grid-template-columns: 1fr;
  }

  .free-start-box {
    padding: 20px;
  }
}


/* Gemini API key help v9: simple UX */
.simple-help-page {
  max-width: 1040px;
}

.simple-help-hero .lead {
  max-width: 860px;
}

.simple-notice {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
  margin-top: 24px;
  padding: 16px 18px;
  background: #f2fbf6;
  border: 1px solid #b8dec8;
  border-radius: 18px;
}

.simple-section {
  margin-top: 54px;
}

.simple-steps {
  display: grid;
  gap: 18px;
}

.simple-step {
  display: grid;
  grid-template-columns: 54px minmax(0, 1fr);
  gap: 18px;
  padding: 24px;
  background: #ffffff;
  border: 1px solid #e2e8f0;
  border-radius: 22px;
  box-shadow: 0 10px 24px rgba(15, 23, 42, 0.05);
}

.simple-step h3 {
  margin-top: 0;
}

.step-number {
  width: 42px;
  height: 42px;
  display: grid;
  place-items: center;
  background: #0f766e;
  color: #ffffff;
  border-radius: 50%;
  font-weight: 800;
  font-size: 1.15rem;
}

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

.simple-caution-list {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 16px;
}

.simple-caution-card {
  padding: 20px;
  background: #fffaf0;
  border: 1px solid #f0d49b;
  border-radius: 18px;
}

.simple-caution-card h3 {
  margin-top: 0;
  margin-bottom: 8px;
}

.simple-caution-card p {
  margin-bottom: 0;
}

.simple-faq {
  display: grid;
  gap: 12px;
}

.simple-faq details {
  background: #ffffff;
  border: 1px solid #e2e8f0;
  border-radius: 16px;
  padding: 16px 18px;
}

.simple-faq summary {
  cursor: pointer;
  font-weight: 700;
}

.simple-faq p {
  margin-bottom: 0;
}

@media (max-width: 760px) {
  .simple-step {
    grid-template-columns: 1fr;
  }

  .simple-caution-list {
    grid-template-columns: 1fr;
  }

  .simple-notice {
    display: block;
  }

  .simple-notice strong {
    display: block;
    margin-bottom: 6px;
  }
}


/* Gemini API key help v10: copy fix */
.simple-notice.key-definition {
  background: #f8fafc;
  border-color: #d7dee8;
  margin-top: 18px;
}

.simple-notice.key-definition + .simple-notice {
  margin-top: 12px;
}


/* Gemini API key help v11: steps first, details later */
.details-after-steps .section-lead {
  max-width: 780px;
  margin-top: -4px;
  margin-bottom: 20px;
  color: #526173;
}

.details-after-steps .simple-caution-card {
  background: #f8fafc;
  border-color: #d8e1ec;
}

.details-after-steps .simple-caution-card:nth-child(1),
.details-after-steps .simple-caution-card:nth-child(2) {
  background: #f2fbf6;
  border-color: #badfcb;
}