/* === Nav === */
.nav {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(9, 9, 11, 0.85);
  border-bottom: 1px solid var(--border);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
}

.nav-inner {
  display: flex;
  justify-content: space-between;
  align-items: center;
  max-width: var(--max-width);
  padding: 10px var(--gutter);
}

.nav-left {
  display: flex;
  align-items: center;
  gap: 32px;
}

.nav-logo {
  font-size: 22px;
  font-weight: 700;
  color: var(--text-primary);
  letter-spacing: -0.5px;
}

.nav-right {
  display: flex;
  align-items: center;
  gap: 12px;
}

.nav-link {
  font-size: 14px;
  color: var(--text-muted);
  transition: color 0.2s;
}

.nav-link:hover {
  color: var(--text-primary);
}

.nav-github-btn {
  font-size: 13px;
  color: var(--text-primary);
  padding: 6px 14px;
  border: 1px solid var(--border);
  border-radius: 6px;
  transition: background 0.2s;
}

.nav-github-btn:hover {
  background: var(--bg-secondary);
}

/* === Hero === */
.hero {
  text-align: center;
  padding: clamp(48px, 6vw, 80px) 0 clamp(24px, 4vw, 40px);
}

.hero-title {
  font-size: clamp(36px, 7vw, 72px);
  font-weight: 700;
  color: var(--text-primary);
  letter-spacing: clamp(-3px, -0.25vw, -1px);
  line-height: 1.1;
  margin: 0 auto;
}

.hero-subtitle {
  font-size: 16px;
  color: var(--text-muted);
  margin-top: 20px;
  margin-left: auto;
  margin-right: auto;
  line-height: 1.6;
  max-width: 600px;
}

.hero-cta {
  display: flex;
  gap: 10px;
  justify-content: center;
  margin-top: 32px;
}

/* === Buttons === */
.btn {
  display: inline-flex;
  align-items: center;
  padding: 10px 24px;
  border-radius: 8px;
  font-size: 14px;
  font-weight: 600;
  font-family: var(--font-sans);
  cursor: pointer;
  transition:
    opacity 0.2s,
    background 0.2s;
  border: none;
  text-decoration: none;
}

.btn:hover {
  opacity: 0.9;
}

.btn-primary {
  background: var(--cta-bg);
  color: var(--cta-text);
}

.btn-secondary {
  background: transparent;
  color: var(--text-secondary);
  border: 1px solid var(--border);
}

.btn-secondary:hover {
  background: var(--bg-secondary);
}

/* === Terminal === */
.terminal-section {
  padding: clamp(64px, 12vw, 160px) 0 clamp(40px, 6vw, 80px);
}

.terminal {
  margin: 0;
  max-width: none;
  background: var(--bg-secondary);
  border-radius: 12px;
  border: 1px solid var(--border);
  overflow: hidden;
}

.terminal-header {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 12px 16px;
  border-bottom: 1px solid var(--border);
}

.terminal-dots {
  display: flex;
  gap: 6px;
}

.dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
}

.dot-red {
  background: var(--accent-red);
}

.dot-yellow {
  background: var(--accent-yellow);
}

.dot-green {
  background: var(--accent-green);
}

.terminal-title {
  font-size: 12px;
  color: var(--text-dim);
  margin-left: 8px;
}

.terminal-body {
  padding: 0;
}

/* === Feature cards === */
.feature-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
}

.feature-card {
  background: var(--bg-secondary);
  border-radius: 10px;
  padding: 24px;
  border: 1px solid var(--border);
}

.feature-title {
  font-size: 18px;
  font-weight: 600;
  color: var(--text-primary);
  letter-spacing: -0.3px;
  line-height: 1.3;
  margin: 0 0 10px;
}

.feature-desc {
  font-size: 14px;
  color: var(--text-secondary);
  line-height: 1.6;
  margin: 0;
}

.feature-desc code {
  font-family: var(--font-mono);
  font-size: 13px;
  background: var(--bg-primary);
  padding: 2px 6px;
  border-radius: 4px;
}

.feature-note {
  margin: 12px 0 0;
  font-size: 12px;
  color: var(--text-muted);
}

/* === Install === */
.install-blocks {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.install-title {
  font-size: clamp(22px, 2.8vw, 32px);
}

.install-block {
  display: flex;
  justify-content: space-between;
  align-items: center;
  background: var(--bg-secondary);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 16px 20px;
  gap: 16px;
}

.install-info {
  flex: 1;
  min-width: 0;
}

.install-platform {
  display: block;
  font-size: 12px;
  color: var(--text-muted);
  margin-bottom: 4px;
}

.install-cmd {
  display: block;
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--text-secondary);
  overflow-x: auto;
  white-space: nowrap;
}

.copy-btn {
  flex-shrink: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  padding: 0;
  background: none;
  border: 1px solid var(--border);
  border-radius: 6px;
  color: var(--text-dim);
  cursor: pointer;
  transition:
    color 0.2s,
    border-color 0.2s;
}

.copy-btn:hover {
  color: var(--text-secondary);
  border-color: var(--text-dim);
}

.copy-btn.copied {
  color: var(--accent-green);
  border-color: var(--accent-green);
}

.install-note {
  margin-top: 14px;
  font-size: 13px;
  color: var(--text-primary);
}

/* === FAQ === */
.faq-layout {
  display: grid;
  grid-template-columns: minmax(240px, 320px) minmax(0, 760px);
  gap: 40px;
  justify-content: space-between;
  align-items: start;
}

.faq-title {
  text-align: left;
  font-size: clamp(24px, 2.6vw, 30px);
  font-weight: 500;
  letter-spacing: -1px;
  line-height: 1.1;
  margin: 0;
}

.faq-list {
  max-width: none;
  margin: 0;
  border-top: 1px solid rgba(250, 250, 250, 0.08);
}

.faq-item {
  border-bottom: 1px solid rgba(250, 250, 250, 0.08);
}

.faq-question {
  width: 100%;
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 15px 0;
  background: none;
  border: none;
  color: var(--text-primary);
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.01em;
  line-height: 1.35;
  font-family: var(--font-sans);
  cursor: pointer;
  text-align: left;
}

.faq-icon {
  font-size: 13px;
  color: var(--text-dim);
  transition: transform 0.3s;
  flex-shrink: 0;
  margin-left: 24px;
}

.faq-item.open .faq-icon {
  transform: rotate(45deg);
  color: var(--text-primary);
}

.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.3s ease;
  padding-right: 24px;
}

.faq-answer p {
  padding-bottom: 16px;
  font-size: 13px;
  color: var(--text-muted);
  line-height: 1.6;
}

/* === Footer CTA === */
.footer-cta {
  text-align: center;
  padding: clamp(56px, 7vw, 80px) 0;
  border-top: 1px solid var(--border);
}

.footer-cta-title {
  font-size: clamp(22px, 2.8vw, 32px);
  font-weight: 600;
  color: var(--text-primary);
  letter-spacing: -0.5px;
  margin-bottom: 8px;
}

.footer-cta-sub {
  font-size: 15px;
  color: var(--text-muted);
  margin-bottom: 24px;
}

/* === Footer === */
.footer {
  padding: 48px 0 32px;
  font-size: 13px;
  color: var(--text-dim);
}

.footer-top {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
}

.footer-left {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.footer-logo {
  font-size: 15px;
  font-weight: 700;
  color: var(--text-secondary);
  letter-spacing: -0.5px;
}

.footer-nav {
  display: flex;
  gap: 20px;
}

.footer-nav a {
  font-size: 13px;
  color: var(--text-dim);
  transition: color 0.2s;
}

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

.footer-right {
  display: flex;
  align-items: center;
  gap: 16px;
}

.footer-right a {
  color: var(--text-dim);
  transition: color 0.2s;
}

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

.footer-divider {
  height: 1px;
  background: var(--border);
  margin: 24px 0;
}

.footer-bottom {
  color: var(--text-dim);
}

/* === Maker's Note === */
.maker-note {
  max-width: 620px;
  margin: 0 auto;
  text-align: center;
}

.maker-note-body {
  font-style: italic;
  font-size: 16px;
  line-height: 1.7;
  color: var(--text-secondary);
  margin: 0;
}

.maker-note-sign {
  margin-top: 16px;
  font-size: 13px;
  color: var(--text-muted);
}