/* style.css — Codepillar Hosting: blueprint / technical-schematic design system */

:root {
  /* Type scale */
  --text-xs: clamp(0.75rem, 0.7rem + 0.25vw, 0.875rem);
  --text-sm: clamp(0.875rem, 0.8rem + 0.35vw, 1rem);
  --text-base: clamp(1rem, 0.95rem + 0.25vw, 1.125rem);
  --text-lg: clamp(1.125rem, 1rem + 0.75vw, 1.5rem);
  --text-xl: clamp(1.5rem, 1.2rem + 1.25vw, 2.25rem);
  --text-2xl: clamp(2rem, 1.2rem + 2.5vw, 3.5rem);
  --text-3xl: clamp(2.5rem, 1rem + 4vw, 4.5rem);
  --text-hero: clamp(2.75rem, 0.5rem + 6.5vw, 6.5rem);

  /* Spacing (4px system) */
  --space-1: 0.25rem;
  --space-2: 0.5rem;
  --space-3: 0.75rem;
  --space-4: 1rem;
  --space-5: 1.25rem;
  --space-6: 1.5rem;
  --space-8: 2rem;
  --space-10: 2.5rem;
  --space-12: 3rem;
  --space-16: 4rem;
  --space-20: 5rem;
  --space-24: 6rem;
  --space-32: 8rem;

  --radius-sm: 0.25rem;
  --radius-md: 0.375rem;
  --radius-lg: 0.5rem;
  --radius-xl: 0.75rem;
  --radius-full: 9999px;

  --transition-interactive: 160ms cubic-bezier(0.16, 1, 0.3, 1);

  --content-narrow: 640px;
  --content-default: 960px;
  --content-wide: 1180px;
  --content-full: 100%;

  /* Fonts */
  --font-display: 'Bebas Neue', 'Arial Narrow', sans-serif;
  --font-body: 'Inter', -apple-system, sans-serif;
  --font-mono: 'JetBrains Mono', 'Courier New', monospace;
}

/* LIGHT MODE — paper-on-blueprint (light schematic paper) */
:root,
[data-theme='light'] {
  --color-bg: #eef2f6;
  --color-surface: #ffffff;
  --color-surface-2: #f7f9fb;
  --color-surface-offset: #e2e9f0;
  --color-blueprint: #0b3d63;
  --color-blueprint-2: #0f4d7a;
  --color-divider: #c7d3de;
  --color-border: #aebdcd;
  --color-grid-line: oklch(0.35 0.06 240 / 0.08);

  --color-text: #0c2135;
  --color-text-muted: #4c6178;
  --color-text-faint: #8496a8;
  --color-text-inverse: #f4f7fa;

  --color-primary: #0b3d63;
  --color-primary-hover: #0f4d7a;
  --color-primary-active: #082c48;
  --color-primary-highlight: #d7e3ee;

  --color-accent: #d9720c;
  --color-accent-hover: #c2650a;
  --color-accent-active: #a45608;
  --color-accent-highlight: #f7e0c4;

  --color-success: #2f6f4e;

  --shadow-sm: 0 1px 2px oklch(0.2 0.05 240 / 0.08);
  --shadow-md: 0 4px 14px oklch(0.2 0.05 240 / 0.12);
  --shadow-lg: 0 16px 40px oklch(0.2 0.05 240 / 0.18);
}

/* DARK MODE — true blueprint navy/cobalt */
[data-theme='dark'] {
  --color-bg: #0a2540;
  --color-surface: #0d2f4f;
  --color-surface-2: #103862;
  --color-surface-offset: #123f6d;
  --color-blueprint: #0d2f4f;
  --color-blueprint-2: #123f6d;
  --color-divider: #1c4a75;
  --color-border: #2a5a86;
  --color-grid-line: oklch(0.95 0.02 220 / 0.07);

  --color-text: #eef4fa;
  --color-text-muted: #a9c1d6;
  --color-text-faint: #6f8ba6;
  --color-text-inverse: #0a2540;

  --color-primary: #7fb4e0;
  --color-primary-hover: #a3c9ea;
  --color-primary-active: #5e9bcb;
  --color-primary-highlight: #16436c;

  --color-accent: #f0a437;
  --color-accent-hover: #f5b75c;
  --color-accent-active: #d88f22;
  --color-accent-highlight: #3a2c14;

  --color-success: #5fbf8f;

  --shadow-sm: 0 1px 2px oklch(0 0 0 / 0.3);
  --shadow-md: 0 4px 16px oklch(0 0 0 / 0.35);
  --shadow-lg: 0 20px 48px oklch(0 0 0 / 0.5);
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme]) {
    --color-bg: #0a2540;
    --color-surface: #0d2f4f;
    --color-surface-2: #103862;
    --color-surface-offset: #123f6d;
    --color-blueprint: #0d2f4f;
    --color-blueprint-2: #123f6d;
    --color-divider: #1c4a75;
    --color-border: #2a5a86;
    --color-grid-line: oklch(0.95 0.02 220 / 0.07);
    --color-text: #eef4fa;
    --color-text-muted: #a9c1d6;
    --color-text-faint: #6f8ba6;
    --color-text-inverse: #0a2540;
    --color-primary: #7fb4e0;
    --color-primary-hover: #a3c9ea;
    --color-primary-active: #5e9bcb;
    --color-primary-highlight: #16436c;
    --color-accent: #f0a437;
    --color-accent-hover: #f5b75c;
    --color-accent-active: #d88f22;
    --color-accent-highlight: #3a2c14;
    --color-success: #5fbf8f;
    --shadow-sm: 0 1px 2px oklch(0 0 0 / 0.3);
    --shadow-md: 0 4px 16px oklch(0 0 0 / 0.35);
    --shadow-lg: 0 20px 48px oklch(0 0 0 / 0.5);
  }
}

/* ============================= */
/* Blueprint grid background     */
/* ============================= */
.blueprint-grid {
  background-image:
    linear-gradient(var(--color-grid-line) 1px, transparent 1px),
    linear-gradient(90deg, var(--color-grid-line) 1px, transparent 1px);
  background-size: 32px 32px;
}

.blueprint-grid--fine {
  background-image:
    linear-gradient(var(--color-grid-line) 1px, transparent 1px),
    linear-gradient(90deg, var(--color-grid-line) 1px, transparent 1px);
  background-size: 16px 16px;
}

/* Corner registration marks */
.reg-marks {
  position: relative;
}
.reg-marks::before,
.reg-marks::after,
.reg-marks .reg-tl,
.reg-marks .reg-tr {
  content: '';
  position: absolute;
  width: 18px;
  height: 18px;
  border-color: var(--color-border);
  opacity: 0.55;
}
.reg-marks::before {
  top: var(--space-4);
  left: var(--space-4);
  border-top: 1.5px solid;
  border-left: 1.5px solid;
}
.reg-marks::after {
  bottom: var(--space-4);
  right: var(--space-4);
  border-bottom: 1.5px solid;
  border-right: 1.5px solid;
}

/* Monospace annotation label */
.annotation {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--color-accent);
}

.annotation--muted {
  color: var(--color-text-muted);
}

/* Dashed measurement divider */
.measure-line {
  border: none;
  border-top: 1px dashed var(--color-border);
  margin-block: var(--space-8);
}

/* ============================= */
/* Base layout                   */
/* ============================= */
body {
  overflow-x: hidden;
}

.wrap {
  width: 100%;
  max-width: var(--content-wide);
  margin-inline: auto;
  padding-inline: clamp(var(--space-5), 4vw, var(--space-10));
}

section {
  padding-block: clamp(var(--space-16), 8vw, var(--space-24));
  position: relative;
}

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

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--color-accent);
  margin-bottom: var(--space-4);
}
.eyebrow::before {
  content: '';
  width: 8px;
  height: 8px;
  border: 1.5px solid currentColor;
  transform: rotate(45deg);
  flex-shrink: 0;
}

h1,
h2,
h3,
.font-display {
  font-family: var(--font-display);
  font-weight: 400;
  letter-spacing: 0.01em;
  text-transform: uppercase;
}

h2.section-title {
  font-size: var(--text-2xl);
  line-height: 1.05;
  margin-bottom: var(--space-4);
  color: var(--color-text);
}

.section-sub {
  font-size: var(--text-base);
  color: var(--color-text-muted);
  max-width: 60ch;
  margin-bottom: var(--space-12);
}

/* ============================= */
/* Header / Nav                  */
/* ============================= */
.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: oklch(from var(--color-bg) l c h / 0.88);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--color-divider);
  transition: transform 0.3s cubic-bezier(0.16, 1, 0.3, 1);
}
.site-header.header--hidden {
  transform: translateY(-100%);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-6);
  padding-block: var(--space-4);
}

.brand {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  font-family: var(--font-display);
  font-size: var(--text-lg);
  letter-spacing: 0.02em;
  text-transform: uppercase;
  color: var(--color-text);
}
.brand svg {
  width: 32px;
  height: 32px;
  color: var(--color-accent);
  flex-shrink: 0;
}

.main-nav {
  display: flex;
  align-items: center;
  gap: var(--space-6);
}
.main-nav ul {
  display: flex;
  gap: var(--space-6);
}
.main-nav a {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--color-text-muted);
  padding-block: var(--space-2);
  border-bottom: 1px solid transparent;
}
.main-nav a:hover {
  color: var(--color-text);
  border-bottom-color: var(--color-accent);
}

.nav-toggle {
  display: none;
  width: 44px;
  height: 44px;
  align-items: center;
  justify-content: center;
  color: var(--color-text);
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  text-transform: uppercase;
  letter-spacing: 0.06em;
  padding: var(--space-3) var(--space-6);
  border-radius: var(--radius-sm);
  border: 1.5px solid transparent;
  min-height: 44px;
  white-space: nowrap;
}
.btn-primary {
  background: var(--color-accent);
  color: #16110a;
  font-weight: 600;
}
.btn-primary:hover {
  background: var(--color-accent-hover);
}
.btn-primary:active {
  background: var(--color-accent-active);
}
.btn-outline {
  background: transparent;
  border-color: var(--color-border);
  color: var(--color-text);
}
.btn-outline:hover {
  border-color: var(--color-accent);
  color: var(--color-accent);
}

.theme-toggle {
  width: 40px;
  height: 40px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-sm);
  border: 1px solid var(--color-border);
  color: var(--color-text-muted);
  flex-shrink: 0;
}
.theme-toggle:hover {
  color: var(--color-accent);
  border-color: var(--color-accent);
}

/* ============================= */
/* Hero                           */
/* ============================= */
.hero {
  padding-block: clamp(var(--space-20), 12vw, var(--space-32)) clamp(var(--space-16), 8vw, var(--space-24));
  background: var(--color-blueprint);
  color: var(--color-text-inverse);
  position: relative;
  overflow: hidden;
}
[data-theme='light'] .hero,
:root:not([data-theme='dark']) .hero {
  --color-grid-line: oklch(0.95 0.02 220 / 0.12);
}
.hero .wrap {
  position: relative;
  z-index: 1;
}

.hero-tag {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: #ffb762;
  display: flex;
  align-items: center;
  gap: var(--space-3);
  margin-bottom: var(--space-6);
}
.hero-tag .dim {
  color: oklch(0.95 0.02 220 / 0.5);
}

.hero h1 {
  font-size: var(--text-hero);
  line-height: 0.98;
  color: #f5f8fb;
  max-width: 16ch;
  margin-bottom: var(--space-6);
}
.hero h1 em {
  font-style: normal;
  color: #ffb762;
}

.hero-sub {
  font-family: var(--font-body);
  font-size: var(--text-lg);
  font-weight: 400;
  color: oklch(0.95 0.02 220 / 0.78);
  max-width: 52ch;
  margin-bottom: var(--space-10);
}

.hero-ctas {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-4);
  margin-bottom: var(--space-16);
}
.hero-ctas .btn-outline {
  border-color: oklch(0.95 0.02 220 / 0.3);
  color: #f5f8fb;
}
.hero-ctas .btn-outline:hover {
  border-color: #ffb762;
  color: #ffb762;
}

.hero-stats {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-6);
  border-top: 1px dashed oklch(0.95 0.02 220 / 0.25);
  padding-top: var(--space-6);
  max-width: 640px;
}
.hero-stat .num {
  font-family: var(--font-mono);
  font-size: var(--text-lg);
  color: #ffb762;
  display: block;
}
.hero-stat .label {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: oklch(0.95 0.02 220 / 0.6);
}

/* ============================= */
/* Feature cards                  */
/* ============================= */
.features-layout {
  display: grid;
  grid-template-columns: repeat(6, 1fr);
  gap: var(--space-5);
}

.feature-card {
  background: var(--color-surface);
  border: 1px solid var(--color-divider);
  border-radius: var(--radius-md);
  padding: var(--space-8);
  position: relative;
}

.feature-card--lead {
  grid-column: span 4;
}
.feature-card--sm {
  grid-column: span 2;
}

.feature-index {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  color: var(--color-text-faint);
  margin-bottom: var(--space-4);
}

.feature-card h3 {
  font-size: var(--text-lg);
  text-transform: none;
  letter-spacing: 0;
  margin-bottom: var(--space-3);
  color: var(--color-text);
}

.feature-card p {
  color: var(--color-text-muted);
  font-size: var(--text-sm);
}

.feature-card--lead p {
  font-size: var(--text-base);
  max-width: 48ch;
}

.editor-preview {
  margin-top: var(--space-6);
  border: 1px solid var(--color-divider);
  border-radius: var(--radius-sm);
  overflow: hidden;
  background: var(--color-blueprint);
}
.editor-preview-bar {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-2) var(--space-3);
  border-bottom: 1px solid oklch(0.95 0.02 220 / 0.15);
}
.editor-preview-bar span {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: oklch(0.95 0.02 220 / 0.25);
}
.editor-preview-split {
  display: grid;
  grid-template-columns: 1fr 1fr;
  min-height: 120px;
}
.editor-preview-code {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  color: #8fd0ff;
  padding: var(--space-4);
  border-right: 1px dashed oklch(0.95 0.02 220 / 0.2);
  line-height: 1.7;
}
.editor-preview-code .tag { color: #ffb762; }
.editor-preview-code .str { color: #9be89d; }
.editor-preview-live {
  padding: var(--space-4);
  color: #f5f8fb;
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
  justify-content: center;
}
.editor-preview-live .live-h {
  font-family: var(--font-display);
  text-transform: uppercase;
  font-size: var(--text-base);
}
.editor-preview-live .live-p {
  font-family: var(--font-body);
  font-size: var(--text-xs);
  color: oklch(0.95 0.02 220 / 0.65);
}
.editor-preview-live .live-btn {
  align-self: flex-start;
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  text-transform: uppercase;
  background: #ffb762;
  color: #16110a;
  padding: var(--space-1) var(--space-3);
  border-radius: var(--radius-sm);
}

/* ============================= */
/* Pricing                        */
/* ============================= */
.pricing-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-6);
  align-items: stretch;
}

.price-card {
  background: var(--color-surface);
  border: 1px solid var(--color-divider);
  border-radius: var(--radius-md);
  padding: var(--space-8);
  display: flex;
  flex-direction: column;
  position: relative;
}

.price-card--popular {
  border-color: var(--color-accent);
  box-shadow: var(--shadow-lg);
}

.price-badge {
  position: absolute;
  top: -13px;
  left: var(--space-8);
  background: var(--color-accent);
  color: #16110a;
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  text-transform: uppercase;
  letter-spacing: 0.06em;
  font-weight: 700;
  padding: var(--space-1) var(--space-3);
  border-radius: var(--radius-full);
}

.price-tier {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--color-text-muted);
  margin-bottom: var(--space-3);
}

.price-amount {
  font-family: var(--font-mono);
  font-size: var(--text-2xl);
  color: var(--color-text);
  margin-bottom: var(--space-1);
  font-weight: 700;
}
.price-amount span {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  font-weight: 400;
}

.price-desc {
  color: var(--color-text-muted);
  font-size: var(--text-sm);
  margin-bottom: var(--space-6);
}

.price-features {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
  margin-bottom: var(--space-8);
  flex-grow: 1;
}
.price-features li {
  display: flex;
  gap: var(--space-2);
  font-size: var(--text-sm);
  color: var(--color-text);
  max-width: none;
}
.price-features li svg {
  width: 16px;
  height: 16px;
  color: var(--color-accent);
  flex-shrink: 0;
  margin-top: 3px;
}

.pricing-note {
  margin-top: var(--space-8);
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  color: var(--color-text-muted);
  text-align: center;
}

/* ============================= */
/* How it works                   */
/* ============================= */
.steps {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-8);
  position: relative;
}

.step {
  position: relative;
  padding-top: var(--space-8);
  border-top: 1px dashed var(--color-border);
}

.step-num {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  color: var(--color-accent);
  margin-bottom: var(--space-3);
  display: block;
}

.step h3 {
  font-size: var(--text-lg);
  text-transform: none;
  letter-spacing: 0;
  margin-bottom: var(--space-3);
  color: var(--color-text);
}

.step p {
  color: var(--color-text-muted);
  font-size: var(--text-sm);
}

/* ============================= */
/* FAQ                            */
/* ============================= */
.faq-list {
  max-width: var(--content-default);
}
.faq-item {
  border-bottom: 1px solid var(--color-divider);
}
.faq-item:first-child {
  border-top: 1px solid var(--color-divider);
}
.faq-q {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-4);
  padding-block: var(--space-6);
  text-align: left;
  font-size: var(--text-base);
  font-weight: 600;
  color: var(--color-text);
}
.faq-q .plus {
  font-family: var(--font-mono);
  color: var(--color-accent);
  font-size: var(--text-lg);
  flex-shrink: 0;
  transition: transform var(--transition-interactive);
}
.faq-item[data-open='true'] .plus {
  transform: rotate(45deg);
}
.faq-a {
  overflow: hidden;
  max-height: 0;
  transition: max-height 260ms cubic-bezier(0.16, 1, 0.3, 1);
}
.faq-item[data-open='true'] .faq-a {
  max-height: 300px;
}
.faq-a p {
  padding-bottom: var(--space-6);
  color: var(--color-text-muted);
  font-size: var(--text-sm);
  max-width: 68ch;
}

/* ============================= */
/* Final CTA + contact form       */
/* ============================= */
.cta-section {
  background: var(--color-blueprint);
  color: var(--color-text-inverse);
}
.cta-grid {
  display: grid;
  grid-template-columns: 1.1fr 1fr;
  gap: var(--space-16);
  align-items: start;
}

.cta-grid h2 {
  color: #f5f8fb;
  font-size: var(--text-2xl);
  margin-bottom: var(--space-4);
}
.cta-grid .section-sub {
  color: oklch(0.95 0.02 220 / 0.72);
}

.contact-form {
  background: oklch(0.95 0.02 220 / 0.05);
  border: 1px solid oklch(0.95 0.02 220 / 0.18);
  border-radius: var(--radius-md);
  padding: var(--space-8);
  display: flex;
  flex-direction: column;
  gap: var(--space-5);
}

.form-field {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}
.form-field label {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: oklch(0.95 0.02 220 / 0.65);
}
.form-field input,
.form-field textarea,
.form-field select {
  background: oklch(0.95 0.02 220 / 0.06);
  border: 1px solid oklch(0.95 0.02 220 / 0.22);
  border-radius: var(--radius-sm);
  padding: var(--space-3) var(--space-4);
  color: #f5f8fb;
  font-size: var(--text-sm);
  min-height: 44px;
}
.form-field textarea {
  min-height: 96px;
  resize: vertical;
}
.form-field input::placeholder,
.form-field textarea::placeholder {
  color: oklch(0.95 0.02 220 / 0.35);
}
.form-field input:focus-visible,
.form-field textarea:focus-visible,
.form-field select:focus-visible {
  outline: 2px solid var(--color-accent);
  outline-offset: 2px;
}

.form-note {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  color: oklch(0.95 0.02 220 / 0.5);
}

/* ============================= */
/* Footer                         */
/* ============================= */
.site-footer {
  padding-block: var(--space-12);
  border-top: 1px solid var(--color-divider);
}
.footer-inner {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-6);
}
.footer-brand {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  font-family: var(--font-display);
  font-size: var(--text-base);
  text-transform: uppercase;
  color: var(--color-text);
}
.footer-brand svg {
  width: 22px;
  height: 22px;
  color: var(--color-accent);
}
.footer-meta {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  color: var(--color-text-faint);
  display: flex;
  gap: var(--space-6);
  flex-wrap: wrap;
}
.footer-meta a:hover {
  color: var(--color-accent);
}

/* ============================= */
/* Responsive                     */
/* ============================= */
@media (max-width: 900px) {
  .features-layout {
    grid-template-columns: repeat(2, 1fr);
  }
  .feature-card--lead,
  .feature-card--sm {
    grid-column: span 2;
  }
  .pricing-grid {
    grid-template-columns: 1fr;
  }
  .steps {
    grid-template-columns: 1fr;
  }
  .cta-grid {
    grid-template-columns: 1fr;
    gap: var(--space-10);
  }
  .hero-stats {
    grid-template-columns: repeat(3, 1fr);
    max-width: none;
  }
}

@media (max-width: 720px) {
  .main-nav ul {
    display: none;
  }
  .nav-toggle {
    display: inline-flex;
  }
  .header-inner {
    flex-wrap: wrap;
  }
  .features-layout {
    grid-template-columns: 1fr;
  }
  .feature-card--lead,
  .feature-card--sm {
    grid-column: span 1;
  }
  .hero-ctas {
    flex-direction: column;
    align-items: stretch;
  }
  .hero-stats {
    grid-template-columns: 1fr 1fr;
    row-gap: var(--space-5);
  }
}

@media (max-width: 480px) {
  .hero-stats {
    grid-template-columns: 1fr;
  }
}

/* ============================= */
/* Knowledge Base                 */
/* ============================= */
.kb-hero {
  padding-block: clamp(var(--space-16), 10vw, var(--space-24)) clamp(var(--space-12), 6vw, var(--space-16));
  background: var(--color-blueprint);
  color: var(--color-text-inverse);
  position: relative;
  overflow: hidden;
}
[data-theme='light'] .kb-hero,
:root:not([data-theme='dark']) .kb-hero {
  --color-grid-line: oklch(0.95 0.02 220 / 0.12);
}
.kb-hero .wrap {
  position: relative;
  z-index: 1;
}
.kb-hero h1 {
  font-size: var(--text-3xl);
  line-height: 1;
  color: #f5f8fb;
  max-width: 18ch;
  margin-bottom: var(--space-5);
}
.kb-hero h1 em {
  font-style: normal;
  color: #ffb762;
}
.kb-hero .hero-sub {
  margin-bottom: var(--space-8);
}

.kb-search {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  background: oklch(0.95 0.02 220 / 0.06);
  border: 1px solid oklch(0.95 0.02 220 / 0.22);
  border-radius: var(--radius-sm);
  padding: var(--space-3) var(--space-5);
  max-width: 560px;
}
.kb-search svg {
  width: 18px;
  height: 18px;
  color: oklch(0.95 0.02 220 / 0.55);
  flex-shrink: 0;
}
.kb-search input {
  flex: 1;
  min-width: 0;
  background: transparent;
  border: none;
  outline: none;
  color: #f5f8fb;
  font-family: var(--font-body);
  font-size: var(--text-sm);
}
.kb-search input::placeholder {
  color: oklch(0.95 0.02 220 / 0.4);
}
.kb-search-count {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  color: #ffb762;
  white-space: nowrap;
  flex-shrink: 0;
}

.kb-layout {
  display: grid;
  grid-template-columns: 220px 1fr;
  gap: var(--space-12);
  align-items: start;
}
.kb-toc {
  position: sticky;
  top: calc(var(--space-16) + 60px);
}
.kb-toc ul {
  display: flex;
  flex-direction: column;
  gap: var(--space-1);
  margin-top: var(--space-4);
}
.kb-toc a {
  display: block;
  padding-block: var(--space-2);
  padding-left: var(--space-3);
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: var(--color-text-muted);
  border-left: 2px solid transparent;
}
.kb-toc a:hover {
  color: var(--color-accent);
  border-left-color: var(--color-accent);
}

.kb-categories {
  min-width: 0;
}
.kb-category {
  margin-bottom: var(--space-16);
}
.kb-category:last-child {
  margin-bottom: 0;
}
.kb-category-title {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
  font-size: var(--text-xl);
  margin-bottom: var(--space-6);
  padding-bottom: var(--space-4);
  border-bottom: 1px dashed var(--color-border);
  color: var(--color-text);
}
.kb-category-title .feature-index {
  margin-bottom: 0;
}

.kb-empty {
  padding-block: var(--space-12);
  text-align: center;
  color: var(--color-text-muted);
  font-size: var(--text-base);
}
.kb-empty a {
  color: var(--color-accent);
  text-decoration: underline;
  text-underline-offset: 2px;
}

.kb-article {
  border-bottom: 1px solid var(--color-divider);
}
.kb-article:first-child {
  border-top: 1px solid var(--color-divider);
}
.kb-article-q {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-4);
  padding-block: var(--space-5);
  text-align: left;
  font-family: var(--font-body);
  font-size: var(--text-base);
  font-weight: 600;
  color: var(--color-text);
}
.kb-article-q .plus {
  font-family: var(--font-mono);
  color: var(--color-accent);
  font-size: var(--text-lg);
  flex-shrink: 0;
  transition: transform var(--transition-interactive);
}
.kb-article[data-open='true'] .kb-article-q .plus {
  transform: rotate(45deg);
}
.kb-article-a {
  overflow: hidden;
  max-height: 0;
  transition: max-height 320ms cubic-bezier(0.16, 1, 0.3, 1);
}
.kb-article[data-open='true'] .kb-article-a {
  max-height: 2000px;
}
.kb-article-a p,
.kb-article-a ol {
  color: var(--color-text-muted);
  font-size: var(--text-sm);
  max-width: 68ch;
  margin-bottom: var(--space-4);
}
.kb-article-a ol {
  padding-left: 1.25em;
}
.kb-article-a li {
  margin-bottom: var(--space-2);
}
.kb-article-a > *:last-child {
  margin-bottom: var(--space-6);
}
.kb-article-a code {
  font-family: var(--font-mono);
  background: var(--color-surface-2);
  padding: 0.1em 0.4em;
  border-radius: 3px;
  font-size: 0.9em;
  color: var(--color-text);
}
.kb-article-a a {
  color: var(--color-accent);
  text-decoration: underline;
  text-underline-offset: 2px;
}

.kb-cta {
  background: var(--color-blueprint);
  color: var(--color-text-inverse);
}
.kb-cta-inner {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-8);
}
.kb-cta-inner .section-title {
  color: #f5f8fb;
}
.kb-cta-inner .section-sub {
  color: oklch(0.95 0.02 220 / 0.72);
  max-width: 46ch;
}

@media (max-width: 900px) {
  .kb-layout {
    grid-template-columns: 1fr;
  }
  .kb-toc {
    position: static;
  }
  .kb-toc ul {
    flex-direction: row;
    flex-wrap: wrap;
    gap: var(--space-2) var(--space-5);
  }
  .kb-toc a {
    border-left: none;
    border-bottom: 2px solid transparent;
    padding-left: 0;
    padding-bottom: var(--space-1);
  }
  .kb-toc a:hover {
    border-left-color: transparent;
    border-bottom-color: var(--color-accent);
  }
}

@media (max-width: 720px) {
  .kb-cta-inner {
    flex-direction: column;
    align-items: stretch;
    text-align: left;
  }
  .kb-cta-inner .btn {
    width: 100%;
  }
  .kb-search {
    flex-wrap: wrap;
  }
}