/* ==========================================================================
   Discord × Steam VC Bot — Landing Page Stylesheet
   Self-contained, no external fonts / assets. Light + dark via
   prefers-color-scheme. Palette: Discord blurple x Steam sky-blue,
   generous whitespace, restrained accent usage.
   ========================================================================== */

:root {
  --bg: #f6f7fb;
  --bg-soft: #eef0f8;
  --surface: #ffffff;
  --surface-2: #f1f3fa;
  --border: #e2e5f0;
  --text: #161a24;
  --text-soft: #4b5468;
  --text-faint: #7a8398;
  --accent-discord: #5865f2;
  --accent-discord-ink: #4752c4;
  --accent-steam: #1b8de0;
  --accent-steam-ink: #0f6bb3;
  --accent-gold: #b8860f;
  --success: #1f8a45;
  --danger: #c0392b;
  --shadow-lg: 0 24px 60px -28px rgba(22, 26, 36, 0.35);
  --shadow-sm: 0 10px 24px -16px rgba(22, 26, 36, 0.3);
  --radius-lg: 28px;
  --radius-md: 18px;
  --radius-sm: 12px;
  --radius-pill: 999px;
  --font-sans: -apple-system, BlinkMacSystemFont, "Hiragino Sans", "Hiragino Kaku Gothic ProN",
    "Yu Gothic", "Segoe UI", Roboto, "Noto Sans JP", Meiryo, Arial, sans-serif;
  --maxw: 1120px;
  color-scheme: light dark;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0d1016;
    --bg-soft: #11141c;
    --surface: #171b26;
    --surface-2: #1c212f;
    --border: #2b3143;
    --text: #edf0f8;
    --text-soft: #b7bfd3;
    --text-faint: #838ca3;
    --accent-discord: #8b93ff;
    --accent-discord-ink: #a7adff;
    --accent-steam: #5cc4ff;
    --accent-steam-ink: #86d4ff;
    --accent-gold: #e3b24d;
    --success: #4fce7a;
    --danger: #ff8a7a;
    --shadow-lg: 0 24px 70px -24px rgba(0, 0, 0, 0.65);
    --shadow-sm: 0 12px 28px -16px rgba(0, 0, 0, 0.55);
  }
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: var(--font-sans);
  background: var(--bg);
  color: var(--text);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

img,
svg {
  max-width: 100%;
  display: block;
}

a {
  color: inherit;
  text-decoration: none;
}

h1,
h2,
h3,
p,
ol,
ul {
  margin: 0;
}

.skip-link {
  position: absolute;
  left: -9999px;
  top: 0;
  background: var(--accent-discord);
  color: #fff;
  padding: 0.75rem 1.25rem;
  border-radius: var(--radius-sm);
  z-index: 1000;
}

.skip-link:focus {
  left: 1rem;
  top: 1rem;
}

:focus-visible {
  outline: 2px solid var(--accent-steam);
  outline-offset: 3px;
}

/* ---------- layout helpers ---------- */

.section-inner,
.nav-inner,
.hero-inner,
.footer-inner {
  max-width: var(--maxw);
  margin: 0 auto;
  padding-left: clamp(1.25rem, 4vw, 2.5rem);
  padding-right: clamp(1.25rem, 4vw, 2.5rem);
}

section {
  padding: clamp(3.5rem, 8vw, 6.5rem) 0;
}

.section-alt {
  background: var(--bg-soft);
}

.eyebrow {
  display: inline-block;
  font-size: 0.8rem;
  font-weight: 700;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--accent-steam-ink);
}

h2.section-title {
  font-size: clamp(1.6rem, 3.4vw, 2.3rem);
  font-weight: 800;
  letter-spacing: -0.01em;
  margin-top: 0.6rem;
}

.section-lead {
  margin-top: 0.9rem;
  color: var(--text-soft);
  font-size: 1.05rem;
  max-width: 640px;
}

.section-head {
  margin-bottom: clamp(2rem, 5vw, 3rem);
}

/* ---------- nav ---------- */

.nav {
  position: sticky;
  top: 0;
  z-index: 100;
  background: color-mix(in srgb, var(--bg) 88%, transparent);
  backdrop-filter: saturate(160%) blur(10px);
  border-bottom: 1px solid var(--border);
}

.nav-inner {
  display: flex;
  align-items: center;
  gap: 1.5rem;
  padding-top: 0.9rem;
  padding-bottom: 0.9rem;
}

.brand {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  font-weight: 800;
  font-size: 1.02rem;
  white-space: nowrap;
}

.brand-mark {
  width: 34px;
  height: 34px;
  border-radius: 10px;
  flex: none;
}

.nav-links {
  display: none;
  gap: 1.75rem;
  font-size: 0.92rem;
  font-weight: 600;
  color: var(--text-soft);
}

.nav-links a:hover {
  color: var(--text);
}

@media (min-width: 860px) {
  .nav-links {
    display: flex;
  }
}

.nav-actions {
  margin-left: auto;
  display: flex;
  align-items: center;
  gap: 0.9rem;
}

.lang-switch {
  font-size: 0.85rem;
  font-weight: 700;
  padding: 0.4rem 0.7rem;
  border: 1px solid var(--border);
  border-radius: var(--radius-pill);
  color: var(--text-soft);
}

.lang-switch:hover {
  color: var(--text);
  border-color: var(--accent-steam);
}

/* ---------- buttons ---------- */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  font-weight: 700;
  border-radius: var(--radius-pill);
  border: 1px solid transparent;
  cursor: pointer;
  transition: transform 0.15s ease, box-shadow 0.15s ease, background 0.15s ease,
    border-color 0.15s ease;
  white-space: nowrap;
}

.btn-sm {
  padding: 0.55rem 1.1rem;
  font-size: 0.88rem;
}

.btn-lg {
  padding: 0.9rem 1.9rem;
  font-size: 1rem;
}

.btn-primary {
  background: linear-gradient(135deg, var(--accent-discord), var(--accent-steam));
  color: #fff;
  box-shadow: var(--shadow-sm);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg);
}

.btn-ghost {
  background: transparent;
  border-color: var(--border);
  color: var(--text);
}

.btn-ghost:hover {
  border-color: var(--accent-steam);
  color: var(--accent-steam-ink);
}

.hero-note {
  margin-top: 1rem;
  font-size: 0.85rem;
  color: var(--text-faint);
}

/* ---------- hero ---------- */

.hero {
  padding-top: clamp(3rem, 8vw, 5.5rem);
  position: relative;
}

.hero::before {
  content: "";
  position: absolute;
  inset: -10% -10% auto -10%;
  height: 480px;
  background: radial-gradient(
      600px 260px at 15% 20%,
      color-mix(in srgb, var(--accent-discord) 22%, transparent),
      transparent 70%
    ),
    radial-gradient(
      560px 260px at 85% 10%,
      color-mix(in srgb, var(--accent-steam) 20%, transparent),
      transparent 70%
    );
  pointer-events: none;
  z-index: -1;
}

.hero-inner {
  display: grid;
  grid-template-columns: 1fr;
  gap: 3rem;
  align-items: center;
}

@media (min-width: 960px) {
  .hero-inner {
    grid-template-columns: 1.05fr 0.95fr;
  }
}

.hero-copy h1 {
  font-size: clamp(1.9rem, 4.6vw, 3rem);
  font-weight: 800;
  letter-spacing: -0.02em;
  line-height: 1.28;
  margin-top: 0.7rem;
}

.hero-copy .lead {
  margin-top: 1.25rem;
  font-size: 1.08rem;
  color: var(--text-soft);
  max-width: 46ch;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.9rem;
  margin-top: 2rem;
}

/* mock discord embed preview */

.hero-visual {
  position: relative;
}

.mock-embed {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-lg);
  padding: 1.4rem 1.5rem 1.3rem 1.7rem;
  position: relative;
  overflow: hidden;
}

.mock-embed-bar {
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 5px;
  background: var(--success);
}

.mock-embed-title {
  font-weight: 700;
  font-size: 1.02rem;
  margin-bottom: 0.9rem;
}

.mock-embed-list {
  list-style: none;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 0.55rem;
}

.mock-embed-list li {
  display: flex;
  align-items: baseline;
  gap: 0.55rem;
  font-size: 0.92rem;
}

.mock-rank {
  font-weight: 700;
  color: var(--accent-steam-ink);
  width: 1.1em;
  flex: none;
}

.mock-name {
  font-weight: 700;
  color: var(--accent-discord-ink);
}

.mock-meta {
  color: var(--text-faint);
  font-size: 0.85rem;
  margin-left: auto;
  white-space: nowrap;
}

.mock-embed-footer {
  margin-top: 1rem;
  padding-top: 0.8rem;
  border-top: 1px solid var(--border);
  font-size: 0.78rem;
  color: var(--text-faint);
}

.visual-caption {
  text-align: center;
  margin-top: 0.9rem;
  font-size: 0.82rem;
  color: var(--text-faint);
}

/* ---------- feature cards ---------- */

.card-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.25rem;
}

@media (min-width: 640px) {
  .card-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (min-width: 1020px) {
  .card-grid.cols-4 {
    grid-template-columns: repeat(4, 1fr);
  }
}

.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 1.75rem 1.6rem;
  box-shadow: var(--shadow-sm);
  transition: transform 0.15s ease, box-shadow 0.15s ease;
}

.card:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-lg);
}

.card-icon {
  width: 46px;
  height: 46px;
  border-radius: 13px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.35rem;
  margin-bottom: 1rem;
  background: linear-gradient(
    135deg,
    color-mix(in srgb, var(--accent-discord) 18%, transparent),
    color-mix(in srgb, var(--accent-steam) 18%, transparent)
  );
}

.card h3 {
  font-size: 1.05rem;
  font-weight: 700;
  margin-bottom: 0.55rem;
}

.card p {
  color: var(--text-soft);
  font-size: 0.93rem;
}

.card code {
  background: var(--surface-2);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 0.1rem 0.4rem;
  font-size: 0.85em;
}

/* ---------- steps ---------- */

.steps {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.5rem;
  counter-reset: step;
}

@media (min-width: 780px) {
  .steps {
    grid-template-columns: repeat(3, 1fr);
  }
}

.step {
  position: relative;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 2rem 1.6rem 1.75rem;
}

.step-num {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 800;
  color: #fff;
  background: linear-gradient(135deg, var(--accent-discord), var(--accent-steam));
  margin-bottom: 1.1rem;
}

.step h3 {
  font-size: 1.05rem;
  font-weight: 700;
  margin-bottom: 0.5rem;
}

.step p {
  color: var(--text-soft);
  font-size: 0.93rem;
}

/* ---------- pricing ---------- */

.pricing-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.5rem;
}

@media (min-width: 780px) {
  .pricing-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

.price-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 2.1rem 1.9rem;
  display: flex;
  flex-direction: column;
  box-shadow: var(--shadow-sm);
}

.price-card.is-premium {
  border-color: color-mix(in srgb, var(--accent-steam) 45%, var(--border));
  background: linear-gradient(180deg, color-mix(in srgb, var(--accent-discord) 6%, var(--surface)) 0%, var(--surface) 45%);
  box-shadow: var(--shadow-lg);
  position: relative;
}

.price-badge {
  position: absolute;
  top: -0.8rem;
  right: 1.6rem;
  background: linear-gradient(135deg, var(--accent-discord), var(--accent-steam));
  color: #fff;
  font-size: 0.75rem;
  font-weight: 700;
  padding: 0.35rem 0.8rem;
  border-radius: var(--radius-pill);
}

.price-plan {
  font-size: 0.9rem;
  font-weight: 700;
  color: var(--text-faint);
  text-transform: uppercase;
  letter-spacing: 0.06em;
}

.price-amount {
  font-size: 2.3rem;
  font-weight: 800;
  margin-top: 0.5rem;
  letter-spacing: -0.02em;
}

.price-amount span {
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--text-faint);
}

.price-list {
  list-style: none;
  padding: 0;
  margin: 1.5rem 0 1.75rem;
  display: flex;
  flex-direction: column;
  gap: 0.7rem;
  color: var(--text-soft);
  font-size: 0.93rem;
  flex: 1;
}

.price-list li {
  display: flex;
  gap: 0.6rem;
  align-items: flex-start;
}

.price-list li::before {
  content: "✓";
  color: var(--success);
  font-weight: 800;
  flex: none;
}

.price-card .btn {
  align-self: stretch;
}

.price-foot {
  margin-top: 0.9rem;
  font-size: 0.8rem;
  color: var(--text-faint);
}

/* ---------- faq ---------- */

.faq-list {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  max-width: 780px;
}

.faq-item {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  overflow: hidden;
}

.faq-item summary {
  cursor: pointer;
  list-style: none;
  padding: 1.15rem 1.4rem;
  font-weight: 700;
  font-size: 0.98rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}

.faq-item summary::-webkit-details-marker {
  display: none;
}

.faq-item summary::after {
  content: "+";
  font-size: 1.3rem;
  font-weight: 400;
  color: var(--accent-steam-ink);
  flex: none;
  transition: transform 0.2s ease;
}

.faq-item[open] summary::after {
  transform: rotate(45deg);
}

.faq-item .faq-body {
  padding: 0 1.4rem 1.3rem;
  color: var(--text-soft);
  font-size: 0.93rem;
}

/* ---------- final cta ---------- */

.cta-band {
  text-align: center;
  background: linear-gradient(135deg, var(--accent-discord), var(--accent-steam));
  border-radius: var(--radius-lg);
  padding: clamp(2.5rem, 6vw, 4rem) clamp(1.5rem, 5vw, 3rem);
  color: #fff;
  margin: 0 clamp(1.25rem, 4vw, 2.5rem);
}

.cta-band h2 {
  font-size: clamp(1.5rem, 3vw, 2.1rem);
  font-weight: 800;
}

.cta-band p {
  margin-top: 0.8rem;
  opacity: 0.92;
}

.cta-band .btn-primary {
  background: #fff;
  color: var(--accent-discord-ink);
  margin-top: 1.75rem;
  box-shadow: 0 12px 30px -10px rgba(0, 0, 0, 0.35);
}

.cta-band .btn-primary:hover {
  transform: translateY(-2px);
}

/* ---------- footer ---------- */

.site-footer {
  border-top: 1px solid var(--border);
  padding: 3rem 0 2.2rem;
  margin-top: 2rem;
  color: var(--text-faint);
  font-size: 0.87rem;
}

.footer-inner {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}

.footer-top {
  display: flex;
  flex-wrap: wrap;
  gap: 2rem;
  justify-content: space-between;
}

.footer-brand {
  font-weight: 700;
  color: var(--text-soft);
}

.footer-links {
  display: flex;
  flex-wrap: wrap;
  gap: 1.1rem 1.6rem;
}

.footer-links a:hover {
  color: var(--text);
}

.footer-bottom {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem 1.5rem;
  justify-content: space-between;
  border-top: 1px solid var(--border);
  padding-top: 1.4rem;
}

.footer-disclaimer {
  max-width: 62ch;
}

@media (max-width: 640px) {
  .hero-actions {
    flex-direction: column;
    align-items: stretch;
  }
  .hero-actions .btn {
    width: 100%;
  }
}

/* ---------- legal pages ---------- */

.legal-header {
  padding: clamp(2.5rem, 6vw, 4rem) 0 1rem;
}

.legal-back {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--text-soft);
  margin-bottom: 1.2rem;
}

.legal-back:hover {
  color: var(--accent-steam-ink);
}

.legal-title {
  font-size: clamp(1.7rem, 4vw, 2.3rem);
  font-weight: 800;
}

.legal-lang-nav {
  display: flex;
  gap: 0.75rem;
  margin-top: 1.25rem;
  font-size: 0.88rem;
  font-weight: 700;
}

.legal-lang-nav a {
  padding: 0.4rem 0.9rem;
  border: 1px solid var(--border);
  border-radius: var(--radius-pill);
  color: var(--text-soft);
}

.legal-lang-nav a:hover {
  color: var(--text);
  border-color: var(--accent-steam);
}

.legal-body {
  max-width: 76ch;
  padding-bottom: clamp(3rem, 6vw, 5rem);
}

.legal-body h2 {
  font-size: 1.25rem;
  font-weight: 800;
  margin-top: 2.6rem;
  margin-bottom: 0.9rem;
}

.legal-body h2:first-child {
  margin-top: 0;
}

.legal-body h3 {
  font-size: 1.05rem;
  font-weight: 700;
  margin-top: 1.6rem;
  margin-bottom: 0.6rem;
}

.legal-body p {
  margin-bottom: 1rem;
  color: var(--text-soft);
}

.legal-body ul,
.legal-body ol {
  margin: 0 0 1rem;
  padding-left: 1.4rem;
  color: var(--text-soft);
}

.legal-body li {
  margin-bottom: 0.45rem;
}

.legal-body li > ul,
.legal-body li > ol {
  margin-top: 0.45rem;
  margin-bottom: 0;
}

.legal-body strong {
  color: var(--text);
}

.legal-body code {
  background: var(--surface-2);
  border-radius: 6px;
  padding: 0.1rem 0.4rem;
  font-size: 0.9em;
}

.legal-body a {
  color: var(--accent-steam-ink);
  text-decoration: underline;
  text-underline-offset: 2px;
}

.legal-note {
  background: var(--surface-2);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 1rem 1.25rem;
  font-size: 0.9rem;
  color: var(--text-faint);
  margin-bottom: 2rem;
}

.legal-table-wrap {
  overflow-x: auto;
  margin-bottom: 1.5rem;
}

.legal-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.92rem;
}

.legal-table th,
.legal-table td {
  text-align: left;
  padding: 0.65rem 0.9rem;
  border-bottom: 1px solid var(--border);
  vertical-align: top;
}

.legal-table th {
  color: var(--text-faint);
  font-weight: 700;
  white-space: nowrap;
}

.legal-divider {
  border: none;
  border-top: 1px solid var(--border);
  margin: 2.6rem 0;
}