/* ═══════════════════════════════════════════════════════
   THEME — Material 3 Violet Palette (matches main app)
   Light/Dark mode via CSS custom properties
   ═══════════════════════════════════════════════════════ */

:root {
  --sentinel-risk-low: #43a047;
  --sentinel-risk-medium: #fb8c00;
  --sentinel-risk-high: #e53935;
  --sentinel-risk-critical: #b71c1c;
  --spacing-xs: 4px;
  --spacing-sm: 8px;
  --spacing-md: 16px;
  --spacing-lg: 24px;
  --spacing-xl: 32px;
  --spacing-xxl: 48px;
  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 12px;
  --radius-xl: 16px;
}

/* ─── LIGHT THEME (default) ─── */
:root, [data-theme="light"] {
  --primary: #6750A4;
  --on-primary: #FFFFFF;
  --primary-container: #EADDFF;
  --on-primary-container: #21005D;
  --secondary: #625B71;
  --on-secondary: #FFFFFF;
  --tertiary: #43a047;
  --surface: #FEF7FF;
  --surface-dim: #DED8E1;
  --surface-container: #F3EDF7;
  --surface-container-low: #F7F2FA;
  --surface-container-high: #ECE6F0;
  --surface-container-highest: #E6E0E9;
  --on-surface: #1D1B20;
  --on-surface-variant: #49454F;
  --outline: #79747E;
  --outline-variant: #CAC4D0;
  --inverse-surface: #322F35;
  --inverse-on-surface: #F5EFF7;
  --error: #B3261E;
  --shadow: rgba(0, 0, 0, 0.15);
  --shadow-md: rgba(0, 0, 0, 0.12);
  --code-bg: #F3EDF7;
  --code-border: #CAC4D0;
}

/* ─── DARK THEME ─── */
[data-theme="dark"] {
  --primary: #D0BCFF;
  --on-primary: #381E72;
  --primary-container: #4F378B;
  --on-primary-container: #EADDFF;
  --secondary: #CCC2DC;
  --on-secondary: #332D41;
  --tertiary: #66BB6A;
  --surface: #141218;
  --surface-dim: #141218;
  --surface-container: #211F26;
  --surface-container-low: #1D1B20;
  --surface-container-high: #2B2930;
  --surface-container-highest: #36343B;
  --on-surface: #E6E0E9;
  --on-surface-variant: #CAC4D0;
  --outline: #938F99;
  --outline-variant: #49454F;
  --inverse-surface: #E6E0E9;
  --inverse-on-surface: #322F35;
  --error: #F2B8B5;
  --shadow: rgba(0, 0, 0, 0.4);
  --shadow-md: rgba(0, 0, 0, 0.3);
  --code-bg: #1D1B20;
  --code-border: #49454F;
}

/* ─── SYSTEM PREFERENCE (auto) ─── */
@media (prefers-color-scheme: dark) {
  [data-theme="system"] {
    --primary: #D0BCFF;
    --on-primary: #381E72;
    --primary-container: #4F378B;
    --on-primary-container: #EADDFF;
    --secondary: #CCC2DC;
    --on-secondary: #332D41;
    --tertiary: #66BB6A;
    --surface: #141218;
    --surface-dim: #141218;
    --surface-container: #211F26;
    --surface-container-low: #1D1B20;
    --surface-container-high: #2B2930;
    --surface-container-highest: #36343B;
    --on-surface: #E6E0E9;
    --on-surface-variant: #CAC4D0;
    --outline: #938F99;
    --outline-variant: #49454F;
    --inverse-surface: #E6E0E9;
    --inverse-on-surface: #322F35;
    --error: #F2B8B5;
    --shadow: rgba(0, 0, 0, 0.4);
    --shadow-md: rgba(0, 0, 0, 0.3);
    --code-bg: #1D1B20;
    --code-border: #49454F;
  }
}

/* ═══════════════════════════════
   RESET & BASE
   ═══════════════════════════════ */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

html { scroll-behavior: smooth; height: 100%; overflow-x: hidden; }

body {
  overflow-x: hidden;
  font-family: 'Roboto', sans-serif;
  font-weight: 400;
  line-height: 1.6;
  background-color: var(--surface);
  color: var(--on-surface);
  transition: background-color 0.2s ease, color 0.2s ease;
  -webkit-font-smoothing: antialiased;
}

a { color: var(--primary); text-decoration: none; }
a:hover { text-decoration: underline; }
img { max-width: 100%; display: block; }

/* ═══════════════════════════════
   MATERIAL ICONS
   ═══════════════════════════════ */
.material-icons {
  font-family: 'Material Icons';
  font-weight: normal;
  font-style: normal;
  font-size: 24px;
  line-height: 1;
  letter-spacing: normal;
  text-transform: none;
  display: inline-block;
  white-space: nowrap;
  word-wrap: normal;
  direction: ltr;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  font-feature-settings: 'liga';
}

/* ═══════════════════════════════
   TYPOGRAPHY
   ═══════════════════════════════ */
h1, h2, h3, h4 { font-weight: 700; line-height: 1.2; color: var(--on-surface); }
h1 { font-size: clamp(2rem, 5vw, 3.5rem); font-weight: 800; }
h2 { font-size: clamp(1.5rem, 3vw, 2.25rem); margin-bottom: 16px; }
h3 { font-size: 1.25rem; }
p { color: var(--on-surface-variant); max-width: 640px; }
.mono { font-family: 'JetBrains Mono', monospace; }

/* ═══════════════════════════════
   LAYOUT
   ═══════════════════════════════ */
.container { max-width: 1200px; margin: 0 auto; padding: 0 24px; }
section { padding: 100px 0; }

.section-label {
  font-size: 0.8rem; font-weight: 500; letter-spacing: 2px;
  text-transform: uppercase; color: var(--primary); margin-bottom: 12px;
}
.section-title { margin-bottom: 20px; }
.section-subtitle {
  font-size: 1.1rem; color: var(--on-surface-variant);
  max-width: 600px; margin-bottom: 48px;
}
.text-center { text-align: center; }
.mx-auto { margin-left: auto; margin-right: auto; }

/* ═══════════════════════════════
   BUTTONS
   ═══════════════════════════════ */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  padding: 14px 28px; border: none; border-radius: var(--radius-md);
  font-family: 'Roboto', sans-serif; font-size: 0.95rem; font-weight: 500;
  cursor: pointer; transition: all 0.2s ease; text-decoration: none;
}
.btn-primary { background: var(--primary); color: var(--on-primary); }
.btn-primary:hover { opacity: 0.9; box-shadow: 0 4px 16px var(--shadow); text-decoration: none; }
.btn-outline { background: transparent; color: var(--primary); border: 1.5px solid var(--outline); }
.btn-outline:hover { border-color: var(--primary); background: var(--primary-container); text-decoration: none; }
.btn-sm { padding: 8px 16px; font-size: 0.85rem; }

/* ═══════════════════════════════
   CARDS
   ═══════════════════════════════ */
.card {
  background: var(--surface-container); border-radius: var(--radius-lg);
  padding: var(--spacing-lg); border: 1px solid var(--outline-variant);
  transition: box-shadow 0.2s ease, border-color 0.2s ease, background-color 0.2s ease;
}
.card:hover { box-shadow: 0 4px 20px var(--shadow-md); border-color: var(--outline); }
.card-highlight {
  border-color: var(--primary);
  box-shadow: 0 0 0 1px var(--primary), 0 4px 20px var(--shadow-md);
  position: relative;
}

/* ═══════════════════════════════
   NAVBAR
   ═══════════════════════════════ */
.navbar {
  position: fixed; top: 0; left: 0; right: 0; z-index: 100;
  background: var(--surface); border-bottom: 1px solid var(--outline-variant);
  transition: background-color 0.2s ease, box-shadow 0.2s ease;
}
.navbar.scrolled { box-shadow: 0 2px 12px var(--shadow); }
.navbar-inner {
  max-width: 1200px; margin: 0 auto; padding: 0 24px; height: 64px;
  display: flex; align-items: center; justify-content: space-between;
}
.logo {
  display: flex; align-items: center; gap: 10px;
  font-weight: 700; font-size: 1.2rem; color: var(--on-surface); text-decoration: none;
}
.logo-icon {
  width: 32px; height: 32px; background: var(--primary);
  border-radius: var(--radius-md); display: flex; align-items: center; justify-content: center;
}
.logo-icon .material-icons { font-size: 20px; color: var(--on-primary); }

.nav-links { display: flex; align-items: center; gap: 24px; list-style: none; }
.nav-links a {
  font-size: 0.9rem; font-weight: 500; color: var(--on-surface-variant); transition: color 0.2s ease;
}
.nav-links a:hover { color: var(--primary); text-decoration: none; }
.nav-actions { display: flex; align-items: center; gap: 12px; }

.theme-toggle {
  width: 40px; height: 40px; border-radius: 50%;
  border: 1px solid var(--outline-variant); background: var(--surface-container);
  color: var(--on-surface-variant); cursor: pointer;
  display: flex; align-items: center; justify-content: center; transition: all 0.2s ease;
}
.theme-toggle:hover {
  border-color: var(--primary); color: var(--primary); background: var(--surface-container-high);
}
.theme-toggle .material-icons { font-size: 20px; }

.hamburger {
  display: none; flex-direction: column; gap: 5px;
  background: none; border: none; cursor: pointer; padding: 4px;
}
.hamburger span {
  display: block; width: 22px; height: 2px;
  background: var(--on-surface); transition: transform 0.2s ease; border-radius: 1px;
}

/* ═══════════════════════════════
   HERO
   ═══════════════════════════════ */
.hero { min-height: 800px; display: flex; align-items: center; padding-top: 64px; }
.hero-inner {
  display: grid; grid-template-columns: 1fr 1fr; gap: 64px; align-items: center;
}
.hero-content { max-width: 560px; }
.hero h1 { margin-bottom: 20px; }
.hero h1 .accent { color: var(--primary); }
.hero-sub {
  font-size: 1.15rem; line-height: 1.7; color: var(--on-surface-variant);
  margin-bottom: 32px; max-width: 480px;
}
.hero-ctas { display: flex; gap: 16px; flex-wrap: wrap; }
.hero-visual { display: flex; flex-direction: column; gap: 20px; }

/* ═══════════════════════════════
   CODE BLOCKS
   ═══════════════════════════════ */
.code-diff {
  font-family: 'JetBrains Mono', monospace; font-size: 0.85rem;
  background: var(--code-bg); border: 1px solid var(--code-border);
  border-radius: var(--radius-lg); padding: 20px; overflow-x: auto;
}
.code-line {
  display: flex; align-items: center; gap: 12px;
  padding: 4px 8px; border-radius: var(--radius-sm);
}
.code-line.removed { background: rgba(229, 57, 53, 0.1); color: var(--sentinel-risk-high); }
.code-line.added { background: rgba(67, 160, 71, 0.1); color: var(--sentinel-risk-low); }
.code-line .minus, .code-line .plus { font-weight: 700; width: 16px; flex-shrink: 0; }
.code-line .minus { color: var(--sentinel-risk-high); }
.code-line .plus { color: var(--sentinel-risk-low); }
.code-line .code { flex: 1; word-break: break-all; }

.terminal-block {
  border-radius: var(--radius-lg); overflow: hidden; border: 1px solid var(--code-border);
}
.terminal-header {
  background: var(--surface-container-highest); padding: 10px 16px;
  display: flex; align-items: center; gap: 8px;
}
.dot { width: 12px; height: 12px; border-radius: 50%; }
.dot.red { background: var(--sentinel-risk-high); }
.dot.yellow { background: var(--sentinel-risk-medium); }
.dot.green { background: var(--sentinel-risk-low); }
.terminal-title {
  font-family: 'JetBrains Mono', monospace; font-size: 0.75rem;
  color: var(--on-surface-variant); margin-left: 8px;
}
.terminal-body {
  background: var(--code-bg); padding: 20px;
  font-family: 'JetBrains Mono', monospace; font-size: 0.8rem;
  display: flex; flex-direction: column; gap: 6px;
  word-break: break-word; overflow-wrap: break-word;
}
.http-status { font-weight: 700; font-size: 1rem; }
.http-status.blocked { color: var(--sentinel-risk-high); }
.http-status.warning { color: var(--sentinel-risk-medium); }
.http-status.allowed { color: var(--sentinel-risk-low); }
.violation-code { color: var(--sentinel-risk-medium); font-weight: 500; }
.violation-text { color: var(--on-surface); }
.legal-ref { color: var(--on-surface-variant); font-size: 0.75rem; }

/* ═══════════════════════════════
   PROBLEM SECTION
   ═══════════════════════════════ */
.problem-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.problem-card .problem-icon {
  width: 48px; height: 48px; border-radius: var(--radius-lg);
  display: flex; align-items: center; justify-content: center; margin-bottom: 16px;
}
.problem-card .problem-icon .material-icons { font-size: 26px; }
.problem-card .problem-icon.danger { background: rgba(229, 57, 53, 0.12); color: var(--sentinel-risk-high); }
.problem-card .problem-icon.warning { background: rgba(251, 140, 0, 0.12); color: var(--sentinel-risk-medium); }
.problem-card h3 { margin-bottom: 8px; font-size: 1.1rem; }
.problem-card p { font-size: 0.9rem; line-height: 1.6; }

/* ═══════════════════════════════
   HOW IT WORKS
   ═══════════════════════════════ */
.steps-grid {
  display: grid; grid-template-columns: repeat(3, 1fr); gap: 32px; counter-reset: steps;
}
.step-card { text-align: center; counter-increment: steps; }
.step-number {
  width: 48px; height: 48px; border-radius: 50%;
  background: var(--primary-container); color: var(--on-primary-container);
  display: flex; align-items: center; justify-content: center;
  font-weight: 700; font-size: 1.2rem; margin: 0 auto 16px;
}
.step-card h3 { margin-bottom: 12px; }
.step-card p { font-size: 0.9rem; margin: 0 auto 16px; }
.step-code {
  font-family: 'JetBrains Mono', monospace; font-size: 0.78rem;
  background: var(--code-bg); border: 1px solid var(--code-border);
  border-radius: var(--radius-md); padding: 12px; text-align: left;
  color: var(--on-surface-variant); overflow-x: auto;
}

/* ═══════════════════════════════
   PROOF SECTION
   ═══════════════════════════════ */
.proof-grid { display: grid; gap: 16px; }
.proof-item {
  display: grid; grid-template-columns: auto 1fr auto; gap: 16px; align-items: center;
  padding: 20px 24px; background: var(--surface-container);
  border: 1px solid var(--outline-variant); border-radius: var(--radius-lg);
  font-family: 'JetBrains Mono', monospace; font-size: 0.85rem;
  transition: background-color 0.2s ease;
}
.proof-usecase { color: var(--on-surface); font-weight: 500; word-break: break-all; }
.proof-arrow { color: var(--on-surface-variant); display: flex; align-items: center; }
.proof-arrow .material-icons { font-size: 20px; }
.proof-outcome {
  padding: 4px 12px; border-radius: 100px; font-size: 0.78rem; font-weight: 500;
  white-space: nowrap; display: inline-flex; align-items: center; gap: 6px;
}
.proof-outcome .material-icons { font-size: 16px; }
.proof-outcome.blocked { background: rgba(229, 57, 53, 0.12); color: var(--sentinel-risk-high); }
.proof-outcome.review { background: rgba(251, 140, 0, 0.12); color: var(--sentinel-risk-medium); }
.proof-outcome.warning { background: rgba(103, 80, 164, 0.12); color: var(--primary); }
.proof-ref {
  display: block; font-size: 0.72rem; color: var(--on-surface-variant);
  margin-top: 2px; font-family: 'Roboto', sans-serif;
}

/* ═══════════════════════════════
   COMPARISON TABLE
   ═══════════════════════════════ */
.comparison-table {
  width: 100%; border-collapse: separate; border-spacing: 0;
  border: 1px solid var(--outline-variant); border-radius: var(--radius-lg);
  overflow: hidden; font-size: 0.9rem; table-layout: fixed;
}
.comparison-table th, .comparison-table td {
  padding: 16px 24px; text-align: left; border-bottom: 1px solid var(--outline-variant);
}
.comparison-table thead th {
  background: var(--surface-container-high); font-weight: 700;
  color: var(--on-surface); font-size: 0.85rem;
}
.comparison-table thead th:nth-child(2) { color: var(--primary); }
.comparison-table tbody td {
  background: var(--surface-container); color: var(--on-surface-variant);
  transition: background-color 0.2s ease;
}
.comparison-table tbody td:first-child { font-weight: 500; color: var(--on-surface); }
.comparison-table tbody td:nth-child(2) { color: var(--sentinel-risk-low); font-weight: 500; }
.comparison-table tbody tr:last-child td { border-bottom: none; }

/* ═══════════════════════════════
   PRICING
   ═══════════════════════════════ */
.pricing-grid {
  display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; align-items: start;
}
.pricing-card { padding: 32px; text-align: center; }
.pricing-card .badge {
  display: inline-block; padding: 4px 14px; border-radius: 100px;
  font-size: 0.72rem; font-weight: 700; text-transform: uppercase;
  letter-spacing: 1px; margin-bottom: 16px;
  background: var(--primary-container); color: var(--on-primary-container);
}
.pricing-card .plan-name { font-size: 1.3rem; font-weight: 700; margin-bottom: 8px; color: var(--on-surface); }
.pricing-card .price { font-size: 2.5rem; font-weight: 800; color: var(--on-surface); margin-bottom: 4px; }
.pricing-card .price .currency { font-size: 1.2rem; font-weight: 500; vertical-align: super; }
.pricing-card .price-period { font-size: 0.85rem; color: var(--on-surface-variant); margin-bottom: 24px; }
.pricing-features { list-style: none; text-align: left; margin-bottom: 28px; }
.pricing-features li {
  padding: 8px 0; font-size: 0.9rem; color: var(--on-surface-variant);
  display: flex; align-items: center; gap: 10px;
}
.pricing-features li .material-icons {
  font-size: 18px; color: var(--sentinel-risk-low); flex-shrink: 0;
}
.pricing-card .btn { width: 100%; }

/* ═══════════════════════════════
   FAQ
   ═══════════════════════════════ */
#faq { background: var(--surface-container-low); }
.faq-list {
  max-width: 800px; margin: 0 auto; display: flex; flex-direction: column; gap: 12px;
}
.faq-item {
  background: var(--surface-container); border: 1px solid var(--outline-variant);
  border-radius: var(--radius-lg); overflow: hidden; transition: border-color 0.2s ease;
}
.faq-item[open] { border-color: var(--primary); }
.faq-item summary {
  padding: 20px 24px; font-weight: 500; font-size: 1rem; color: var(--on-surface);
  cursor: pointer; list-style: none; display: flex; align-items: center; justify-content: space-between; gap: 16px;
}
.faq-item summary::-webkit-details-marker { display: none; }
.faq-item summary::after {
  content: '+'; font-size: 1.4rem; font-weight: 300; color: var(--outline);
  transition: transform 0.2s ease;
}
.faq-item[open] summary::after { content: '−'; color: var(--primary); }
.faq-answer {
  padding: 0 24px 20px; font-size: 0.9rem; line-height: 1.7; color: var(--on-surface-variant);
}
.faq-answer p { max-width: none; }

/* ═══════════════════════════════
   WAITLIST FORM
   ═══════════════════════════════ */
#waitlist { background: var(--surface-container-low); }
.waitlist-box {
  max-width: 600px; margin: 0 auto; background: var(--surface-container);
  border: 1px solid var(--outline-variant); border-radius: var(--radius-xl); padding: 40px;
}
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; margin-bottom: 16px; }
.form-group { display: flex; flex-direction: column; gap: 6px; }
.form-group label { font-size: 0.85rem; font-weight: 500; color: var(--on-surface); }
.form-group input, .form-group select {
  padding: 12px 16px; border: 1px solid var(--outline-variant);
  border-radius: var(--radius-md); background: var(--surface); color: var(--on-surface);
  font-family: 'Roboto', sans-serif; font-size: 0.9rem; transition: border-color 0.2s ease;
}
.form-group input:focus, .form-group select:focus {
  outline: none; border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(103, 80, 164, 0.15);
}
.form-group input::placeholder { color: var(--outline); }
.form-submit { margin-top: 8px; }
.form-submit .btn { width: 100%; padding: 16px; font-size: 1rem; }

.survey-section { margin-top: 32px; padding-top: 24px; border-top: 1px solid var(--outline-variant); }
.survey-section h4 { font-size: 0.9rem; margin-bottom: 16px; color: var(--on-surface); }
.survey-question { margin-bottom: 24px; }
.survey-question p {
  font-size: 0.85rem; font-weight: 500; color: var(--on-surface); margin-bottom: 10px; max-width: none;
}
.radio-group { display: flex; flex-direction: column; gap: 8px; }
.radio-group label {
  display: flex; align-items: center; gap: 10px; font-size: 0.85rem;
  color: var(--on-surface-variant); cursor: pointer; padding: 6px 8px;
  border-radius: var(--radius-md); transition: background-color 0.15s ease;
}
.radio-group label:hover { background: var(--surface-container-high); }
.radio-group input[type="radio"] { accent-color: var(--primary); width: 16px; height: 16px; flex-shrink: 0; }
.form-note { margin-top: 16px; font-size: 0.78rem; color: var(--outline); text-align: center; }

/* ═══════════════════════════════
   FOOTER
   ═══════════════════════════════ */
.footer {
  background: var(--surface-container); border-top: 1px solid var(--outline-variant); padding: 48px 0 32px;
}
.footer-inner {
  display: flex; justify-content: space-between; align-items: flex-start; flex-wrap: wrap; gap: 32px;
}
.footer-brand p { font-size: 0.85rem; color: var(--on-surface-variant); margin-top: 8px; max-width: 280px; }
.footer-links h4 {
  font-size: 0.8rem; font-weight: 700; text-transform: uppercase;
  letter-spacing: 1px; color: var(--on-surface); margin-bottom: 12px;
}
.footer-links ul { list-style: none; }
.footer-links li { margin-bottom: 8px; }
.footer-links a { font-size: 0.85rem; color: var(--on-surface-variant); }
.footer-links a:hover { color: var(--primary); }
.footer-bottom {
  margin-top: 32px; padding-top: 20px; border-top: 1px solid var(--outline-variant);
  font-size: 0.78rem; color: var(--outline); text-align: center;
}

/* ═══════════════════════════════
   ANIMATIONS
   ═══════════════════════════════ */
@keyframes fadeInUp {
  from { opacity: 0; transform: translateY(20px); }
  to   { opacity: 1; transform: translateY(0); }
}
.fade-in { opacity: 0; transform: translateY(20px); }
.fade-in.visible { animation: fadeInUp 0.6s ease forwards; }
.fade-in.visible:nth-child(2) { animation-delay: 0.1s; }
.fade-in.visible:nth-child(3) { animation-delay: 0.2s; }
.fade-in.visible:nth-child(4) { animation-delay: 0.3s; }

/* ═══════════════════════════════
   MOBILE MENU
   ═══════════════════════════════ */
.mobile-menu {
  display: none; position: fixed; top: 64px; left: 0; right: 0; bottom: 0;
  background: var(--surface); z-index: 99; padding: 24px; flex-direction: column; gap: 0;
}
.mobile-menu.open { display: flex; }
.mobile-menu a {
  display: block; padding: 16px 0; font-size: 1.1rem; font-weight: 500;
  color: var(--on-surface); border-bottom: 1px solid var(--outline-variant);
}
.mobile-menu a:hover { color: var(--primary); text-decoration: none; }

/* ═══════════════════════════════
   RESPONSIVE — TABLET (≤ 1024px)
   ═══════════════════════════════ */
@media (max-width: 1024px) {
  .pricing-grid { grid-template-columns: repeat(2, 1fr); }
}

/* ═══════════════════════════════
   RESPONSIVE — MOBILE (≤ 768px)
   ═══════════════════════════════ */
@media (max-width: 768px) {
  /* Navbar */
  .nav-links { display: none; }
  .hamburger { display: flex; }
  .nav-actions .btn { display: none; }
  .navbar-inner { padding: 0 16px; }

  /* Layout */
  .container { padding: 0 16px; }
  section { padding: 56px 0; }

  /* Hero */
  .hero { min-height: auto; padding-top: 88px; padding-bottom: 40px; }
  .hero-inner { grid-template-columns: 1fr; gap: 32px; }
  .hero-visual { order: -1; }
  .hero-content { max-width: 100%; }
  .hero h1 { font-size: 1.75rem; }
  .hero-sub { font-size: 1rem; margin-bottom: 24px; }
  .hero-ctas { flex-direction: column; }
  .hero-ctas .btn { width: 100%; justify-content: center; }

  /* Code blocks */
  .code-diff { padding: 12px; font-size: 0.7rem; }
  .code-line { gap: 6px; padding: 3px 4px; }
  .code-line .code { font-size: 0.65rem; }
  .terminal-body { padding: 12px; font-size: 0.68rem; }

  /* Problem */
  .problem-grid { grid-template-columns: 1fr; gap: 16px; }

  /* Steps */
  .steps-grid { grid-template-columns: 1fr; gap: 20px; }
  .step-code { font-size: 0.72rem; }

  /* Proof */
  .proof-item {
    grid-template-columns: 1fr;
    gap: 8px; padding: 16px;
    font-size: 0.78rem;
  }
  .proof-arrow { display: none; }
  .proof-outcome { align-self: flex-start; }

  /* Comparison */
  .comparison-table { font-size: 0.75rem; display: block; overflow-x: auto; -webkit-overflow-scrolling: touch; }
  .comparison-table thead, .comparison-table tbody, .comparison-table tr { display: table; width: 100%; table-layout: fixed; }
  .comparison-table th, .comparison-table td { padding: 10px 8px; word-break: break-word; }

  /* Pricing */
  .pricing-grid { grid-template-columns: 1fr; gap: 16px; }
  .pricing-card { padding: 24px; }
  .pricing-card .price { font-size: 2rem; }

  /* Waitlist */
  .waitlist-box { padding: 24px; }
  .form-row { grid-template-columns: 1fr; }
  .form-group input, .form-group select { padding: 10px 14px; }

  /* Footer */
  .footer { padding: 32px 0 24px; }
  .footer-inner { flex-direction: column; gap: 24px; }
}

/* ═══════════════════════════════
   RESPONSIVE — SMALL PHONE (≤ 400px)
   ═══════════════════════════════ */
@media (max-width: 400px) {
  h1 { font-size: 1.5rem; }
  h2 { font-size: 1.25rem; }
  .section-subtitle { font-size: 0.95rem; }
  .btn { padding: 12px 20px; font-size: 0.88rem; }
  .pricing-card .price { font-size: 1.75rem; }
  .waitlist-box { padding: 16px; }
  .comparison-table th, .comparison-table td { padding: 8px 8px; font-size: 0.7rem; }
}