/* ==========================================================================
   ViralDNA — design tokens, reset, typography
   ========================================================================== */

:root {
  /* Color */
  --color-bg: #0E0E12;
  --color-bg-raised: #16161C;
  --color-bg-raised-2: #1C1C24;
  --color-text: #F7F7F8;
  --color-text-muted: #B4B4BC;
  --color-text-faint: #8A8A93;
  --color-accent: #FF5436;
  --color-accent-hover: #FF6B50;
  --color-accent-dim: rgba(255, 84, 54, 0.14);
  --color-accent-line: rgba(255, 84, 54, 0.45);
  --color-border: rgba(247, 247, 248, 0.08);
  --color-border-strong: rgba(247, 247, 248, 0.16);
  --color-success: #3ED598;
  --color-error: #FF6161;
  --color-cta: #DFFF3F;
  --color-cta-hover: #EBFF7A;
  --color-cta-ink: #10120A;

  /* Helix gradient stops */
  --color-helix-blue: #5B8CFF;
  --color-helix-purple: #8B6BFF;
  --color-helix-coral: #FF5A3C;

  /* Spacing (8px base) */
  --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-12: 3rem;
  --space-16: 4rem;
  --space-24: 6rem;
  --space-32: 8rem;

  /* Radii */
  --radius-sm: 8px;
  --radius-md: 14px;
  --radius-lg: 20px;
  --radius-pill: 999px;

  /* Motion */
  --ease-out: cubic-bezier(0.16, 1, 0.3, 1);
  --ease-in-out: cubic-bezier(0.65, 0, 0.35, 1);
  --duration-fast: 150ms;
  --duration-base: 300ms;
  --duration-slow: 600ms;
  --duration-reveal: 700ms;

  /* Layout */
  --container-max: 1200px;
  --container-pad: clamp(1.25rem, 5vw, 3rem);

  /* Type */
  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --font-mono: ui-monospace, 'SFMono-Regular', Menlo, Consolas, monospace;
  --fs-h1: clamp(2.25rem, 1.4rem + 3.2vw, 4rem);
  --fs-h2: clamp(1.75rem, 1.3rem + 1.8vw, 2.75rem);
  --fs-h3: clamp(1.25rem, 1.1rem + 0.6vw, 1.5rem);
  --fs-body: clamp(1rem, 0.95rem + 0.2vw, 1.125rem);
  --fs-small: 0.875rem;
  --fs-eyebrow: 0.8125rem;
}

/* ---- Reset ---- */
*, *::before, *::after { box-sizing: border-box; }
* { margin: 0; padding: 0; }
html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }
body {
  background: var(--color-bg);
  color: var(--color-text);
  font-family: var(--font-sans);
  font-size: var(--fs-body);
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}
img, svg { display: block; max-width: 100%; }
button, input, textarea, select { font: inherit; color: inherit; }
button { background: none; border: none; cursor: pointer; }
a { color: inherit; text-decoration: none; }
ul, ol { list-style: none; }
h1, h2, h3, h4 { font-weight: 700; line-height: 1.15; letter-spacing: -0.01em; }

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after {
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.001ms !important;
    scroll-behavior: auto !important;
  }
}

/* ---- Layout helpers ---- */
.container {
  max-width: var(--container-max);
  margin-inline: auto;
  padding-inline: var(--container-pad);
}
section { padding-block: var(--space-24); }
.section-head { max-width: 42rem; margin-bottom: var(--space-12); }
.eyebrow {
  display: inline-block;
  font-size: var(--fs-eyebrow);
  font-weight: 600;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--color-accent);
  margin-bottom: var(--space-4);
}
h2.section-title { font-size: var(--fs-h2); margin-bottom: var(--space-4); }
.section-sub { color: var(--color-text-muted); font-size: var(--fs-body); max-width: 40rem; }

.sr-only {
  position: absolute;
  width: 1px; height: 1px;
  padding: 0; margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

:focus-visible {
  outline: 2px solid var(--color-accent);
  outline-offset: 3px;
  border-radius: 4px;
}

/* ---- Buttons ---- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  padding: 0.85rem 1.5rem;
  border-radius: var(--radius-pill);
  font-weight: 600;
  font-size: 0.95rem;
  transition: transform var(--duration-fast) var(--ease-out), background var(--duration-fast) var(--ease-out), border-color var(--duration-fast) var(--ease-out);
  white-space: nowrap;
}
.btn-primary {
  background: var(--color-cta);
  color: var(--color-cta-ink);
  border: 1px solid rgba(255, 255, 255, 0.24);
  box-shadow: 0 10px 30px rgba(223, 255, 63, 0.22), 0 0 0 1px rgba(223, 255, 63, 0.08);
}
.btn-primary:hover { background: var(--color-cta-hover); transform: translateY(-2px); box-shadow: 0 14px 38px rgba(223, 255, 63, 0.3); }
.btn-secondary {
  background: transparent;
  border: 1px solid var(--color-border-strong);
  color: var(--color-text);
}
.btn-secondary:hover { border-color: var(--color-accent); transform: translateY(-1px); }
.btn:disabled { opacity: 0.5; cursor: not-allowed; transform: none; }

/* ---- Scroll reveal ---- */
[data-reveal] {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity var(--duration-reveal) var(--ease-out),
              transform var(--duration-reveal) var(--ease-out);
  transition-delay: calc(var(--stagger-index, 0) * 80ms);
}
[data-reveal].is-revealed { opacity: 1; transform: none; }

@media (prefers-reduced-motion: reduce) {
  [data-reveal] { opacity: 1 !important; transform: none !important; transition: none !important; }
}

/* ---- Cards (shared) ---- */
.card {
  background: var(--color-bg-raised);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: var(--space-6);
  transition: border-color var(--duration-base) var(--ease-out), transform var(--duration-base) var(--ease-out);
}
.card:hover { border-color: var(--color-border-strong); transform: translateY(-2px); }
.card h3 { font-size: var(--fs-h3); margin-bottom: var(--space-2); }
.card p { color: var(--color-text-muted); }

@media (min-width: 768px) {
  section { padding-block: var(--space-32); }
}

/* ==========================================================================
   NAVIGATION
   ========================================================================== */
.skip-link {
  position: fixed;
  top: -100%;
  left: var(--space-4);
  z-index: 200;
  background: var(--color-accent);
  color: #fff;
  padding: var(--space-2) var(--space-4);
  border-radius: var(--radius-sm);
}
.skip-link:focus {
  position: fixed;
  top: var(--space-4);
  width: auto;
  height: auto;
  clip: auto;
  overflow: visible;
}

.nav {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(14, 14, 18, 0.82);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid transparent;
  transition: border-color var(--duration-base) var(--ease-out);
}
.nav.is-scrolled { border-bottom-color: var(--color-border); background: rgba(14, 14, 18, 0.94); }
.nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-6);
  height: 72px;
}
.nav-logo {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  font-weight: 700;
  font-size: 1.1rem;
}
.logo-mark {
  width: 38px;
  height: 38px;
  flex: 0 0 38px;
  padding: 5px;
  overflow: visible;
  border: 1px solid rgba(139, 107, 255, 0.24);
  border-radius: 12px;
  background: linear-gradient(145deg, rgba(91,140,255,0.11), rgba(255,90,60,0.08));
  filter: drop-shadow(0 7px 16px rgba(91, 140, 255, 0.12));
}
.logo-mark--sm { width: 42px; height: 42px; flex-basis: 42px; }
.nav-links {
  display: none;
  align-items: center;
  gap: var(--space-8);
  font-size: 0.95rem;
  color: var(--color-text-muted);
}
.nav-links a { transition: color var(--duration-fast) var(--ease-out); }
.nav-links a:hover { color: var(--color-text); }
.nav-cta { display: none; }
.nav-toggle {
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 40px;
  height: 40px;
}
.nav-toggle span {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--color-text);
  border-radius: 2px;
  transition: transform var(--duration-base) var(--ease-out), opacity var(--duration-base) var(--ease-out);
}
.nav-toggle[aria-expanded="true"] span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.nav-toggle[aria-expanded="true"] span:nth-child(2) { opacity: 0; }
.nav-toggle[aria-expanded="true"] span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

.nav-overlay {
  position: fixed;
  inset: 72px 0 0 0;
  z-index: 99;
  background: var(--color-bg);
  overflow-y: auto;
}
.nav-overlay[hidden] { display: none; }
.nav-overlay nav {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
  padding: var(--space-8) var(--container-pad);
}
.nav-overlay a {
  font-size: 1.5rem;
  font-weight: 600;
  padding: var(--space-4) 0;
  border-bottom: 1px solid var(--color-border);
}
.nav-overlay .btn { margin-top: var(--space-6); align-self: flex-start; }

@media (min-width: 1024px) {
  .nav-links { display: flex; }
  .nav-cta { display: inline-flex; }
  .nav-toggle { display: none; }
}

/* ==========================================================================
   FOOTER
   ========================================================================== */
.footer {
  border-top: 1px solid var(--color-border);
  padding-block: var(--space-16);
}
.footer-inner {
  display: flex;
  flex-direction: column;
  gap: var(--space-8);
}
.footer-brand { display: flex; flex-direction: column; gap: var(--space-4); max-width: 26rem; }
.footer-brand p { color: var(--color-text-muted); font-size: var(--fs-small); }
.footer-nav { display: flex; flex-wrap: wrap; gap: var(--space-6); font-size: var(--fs-small); color: var(--color-text-muted); }
.footer-nav a:hover { color: var(--color-text); }
.footer-legal {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-4);
  justify-content: space-between;
  font-size: var(--fs-small);
  color: var(--color-text-faint);
  padding-top: var(--space-6);
  border-top: 1px solid var(--color-border);
}
.footer-legal a:hover { color: var(--color-text); }

/* Legal page */
.legal-page { padding-block: calc(var(--space-20) + 72px) var(--space-20); }
.legal-content { max-width: 780px; }
.legal-content > h1 { font-size: var(--fs-h1); line-height: 1.08; margin-bottom: var(--space-4); }
.legal-content section { padding-block: var(--space-8); border-bottom: 1px solid var(--color-border); }
.legal-content h2 { font-size: var(--fs-h3); margin-bottom: var(--space-3); }
.legal-content p { color: var(--color-text-muted); }
.legal-content p + p { margin-top: var(--space-3); }
.legal-content a { color: var(--color-accent); text-decoration: underline; text-underline-offset: 3px; }

@media (min-width: 768px) {
  .footer-inner { flex-direction: row; justify-content: space-between; }
}

/* ==========================================================================
   HERO
   ========================================================================== */
.hero {
  position: relative;
  padding-top: clamp(3rem, 7vw, 6rem);
  overflow: hidden;
  background: var(--color-bg);
}
.hero::after {
  content: '';
  position: absolute;
  inset: auto 0 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--color-border-strong), transparent);
}
/* Hero content (copy + demo) is always visible immediately — the brief requires
   it be understandable within seconds, so nothing here is gated behind scroll,
   IntersectionObserver, or a timed entrance animation that could stall. */
.hero-inner {
  display: flex;
  flex-direction: column;
  gap: var(--space-16);
}
.hero-copy { max-width: 40rem; }
.hero-copy h1 {
  font-size: var(--fs-h1);
  margin-block: var(--space-4);
  max-width: 12ch;
  letter-spacing: -0.035em;
}
.hero-title-main { display: block; text-wrap: balance; }
.hero-title-sub {
  display: block;
  font-size: clamp(1.15rem, 1rem + 0.6vw, 1.5rem);
  font-weight: 600;
  color: #D3D3DA;
  margin-top: var(--space-4);
  letter-spacing: 0;
}
.hero-sub {
  color: var(--color-text-muted);
  max-width: 34rem;
  margin-block: var(--space-6);
  line-height: 1.7;
}
.hero-actions { display: flex; flex-wrap: wrap; align-items: center; gap: var(--space-4); margin-bottom: var(--space-4); }
.hero-actions .btn-primary { min-height: 54px; padding-inline: 1.75rem; font-size: 1rem; font-weight: 800; }
.hero-actions .btn-secondary { border-color: transparent; padding-inline: 0.25rem; }
.hero-actions .btn-secondary:hover { border-color: transparent; color: var(--color-accent); }
.hero-microcopy { color: var(--color-text-muted); font-size: var(--fs-small); max-width: 30rem; }
.hero-tags { color: var(--color-text-faint); font-size: var(--fs-small); margin-top: var(--space-2); }
.hero-tags::before { content: '✓'; color: var(--color-success); margin-right: 0.45rem; }

/* ---- Demo player ---- */
.hero-demo { width: 100%; }
.demo-disclosure {
  margin-bottom: var(--space-4);
  padding: var(--space-4) var(--space-5);
  border: 1px solid var(--color-accent-line);
  border-radius: var(--radius-md);
  background: var(--color-accent-dim);
}
.demo-disclosure strong { display: block; margin-bottom: var(--space-1); color: var(--color-accent); font-size: var(--fs-small); }
.demo-disclosure p { color: var(--color-text-muted); font-size: var(--fs-small); }
.demo-player { display: flex; flex-direction: column; align-items: center; gap: var(--space-6); }

.player-frame {
  position: relative;
  width: 100%;
  max-width: 320px;
  aspect-ratio: 9 / 16;
  background: var(--color-bg-raised);
  border-radius: var(--radius-lg);
  border: 1px solid var(--color-border-strong);
  overflow: hidden;
  display: flex;
  flex-direction: column;
  box-shadow: 0 30px 70px -20px rgba(0, 0, 0, 0.6);
}

.player-chrome-top {
  position: absolute;
  top: 0; left: 0; right: 0;
  z-index: 6;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--space-3) var(--space-4);
  background: linear-gradient(180deg, rgba(0, 0, 0, 0.55), transparent);
  pointer-events: none;
}
.rec-badge { display: flex; align-items: center; gap: 6px; font-size: 11px; font-weight: 700; letter-spacing: 0.05em; color: var(--color-accent); }
.rec-dot { width: 7px; height: 7px; border-radius: 50%; background: var(--color-accent); animation: recPulse 1.6s ease-in-out infinite; }
@keyframes recPulse { 0%, 100% { opacity: 1; } 50% { opacity: 0.3; } }
.timecode {
  font-family: var(--font-mono);
  font-size: 12px;
  color: rgba(247, 247, 248, 0.9);
  background: rgba(0, 0, 0, 0.4);
  padding: 2px 8px;
  border-radius: var(--radius-pill);
}

.player-viewport { position: relative; flex: 1; overflow: hidden; background: var(--color-bg-raised); }
.scene-video {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  background: var(--color-bg-raised);
}
.scene-vignette {
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, rgba(0, 0, 0, 0.28) 0%, transparent 20%, transparent 65%, rgba(0, 0, 0, 0.55) 100%);
  pointer-events: none;
}
.player-viewport.is-flash::after {
  content: '';
  position: absolute; inset: 0;
  background: #fff;
  opacity: 0.18;
  z-index: 4;
  pointer-events: none;
  animation: flashFade 200ms ease-out forwards;
}
@keyframes flashFade { from { opacity: 0.18; } to { opacity: 0; } }

.scan-line { position: absolute; inset: 0; overflow: hidden; pointer-events: none; z-index: 3; }
.scan-line::after {
  content: '';
  position: absolute; left: 0; right: 0; height: 22%;
  background: linear-gradient(180deg, transparent, rgba(255, 84, 54, 0.5), transparent);
  animation: scanMove 4.5s linear infinite;
}
@keyframes scanMove { 0% { transform: translateY(-120%); } 100% { transform: translateY(550%); } }

.zone-analysis {
  position: absolute;
  border: 1.5px dashed var(--color-accent);
  border-radius: 6px;
  z-index: 5;
  opacity: 0;
  transition: top var(--duration-slow) var(--ease-out), left var(--duration-slow) var(--ease-out),
              width var(--duration-slow) var(--ease-out), height var(--duration-slow) var(--ease-out),
              opacity var(--duration-base) var(--ease-out);
  pointer-events: none;
}
.zone-analysis.is-visible { opacity: 1; }
.zone-chip {
  position: absolute;
  top: -11px; left: 6px;
  max-width: min(150px, 92%);
  background: var(--color-accent);
  color: #fff;
  font-size: 10px;
  font-weight: 700;
  line-height: 1.25;
  padding: 3px 8px;
  border-radius: var(--radius-sm);
  white-space: normal;
  overflow-wrap: break-word;
}

.subtitle-bar {
  position: absolute;
  left: 8%; right: 8%; bottom: 12px;
  z-index: 5;
  text-align: center;
  font-size: 12.5px;
  line-height: 1.35;
  color: rgba(247, 247, 248, 0.95);
  background: rgba(0, 0, 0, 0.5);
  backdrop-filter: blur(6px);
  padding: 6px 10px;
  border-radius: 6px;
  opacity: 0;
  transform: translateY(6px);
  transition: opacity var(--duration-base) var(--ease-out), transform var(--duration-base) var(--ease-out);
  pointer-events: none;
}
.subtitle-bar.is-visible { opacity: 1; transform: none; }

.waveform {
  display: flex;
  align-items: flex-end;
  gap: 2.5px;
  height: 26px;
  padding: 4px var(--space-4);
  background: var(--color-bg-raised-2);
  border-top: 1px solid var(--color-border);
}
.waveform-bar {
  flex: 1;
  min-width: 2px;
  background: rgba(247, 247, 248, 0.35);
  border-radius: 2px;
  transform-origin: bottom;
  animation: waveBar 1.2s ease-in-out infinite;
}
@keyframes waveBar { 0%, 100% { transform: scaleY(0.25); } 50% { transform: scaleY(1); } }
.waveform.is-spike .waveform-bar { animation-duration: 0.45s; background: rgba(255, 84, 54, 0.55); }
.waveform.is-settle .waveform-bar { animation-duration: 1.8s; opacity: 0.7; }

.player-chrome-bottom {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  padding: var(--space-2) var(--space-4);
  background: var(--color-bg-raised-2);
}
.play-toggle {
  width: 30px; height: 30px;
  border-radius: 50%;
  background: rgba(247, 247, 248, 0.1);
  display: flex; align-items: center; justify-content: center;
  flex-shrink: 0;
  color: var(--color-text);
  transition: background var(--duration-fast) var(--ease-out);
}
.play-toggle:hover { background: rgba(247, 247, 248, 0.18); }
.progress-track {
  position: relative;
  flex: 1;
  height: 6px;
  background: rgba(247, 247, 248, 0.12);
  border-radius: var(--radius-pill);
  cursor: pointer;
}
.progress-fill {
  position: absolute; inset: 0;
  transform-origin: left;
  transform: scaleX(0);
  background: var(--color-accent);
  border-radius: var(--radius-pill);
}
.progress-markers { position: absolute; inset: 0; }
.progress-marker {
  position: absolute;
  top: 50%;
  width: 10px; height: 10px;
  border-radius: 50%;
  background: rgba(247, 247, 248, 0.4);
  border: 2px solid var(--color-bg-raised-2);
  transform: translate(-50%, -50%);
  transition: background var(--duration-fast) var(--ease-out), transform var(--duration-fast) var(--ease-out);
}
.progress-marker.is-active { background: var(--color-accent); transform: translate(-50%, -50%) scale(1.35); }
.duration-label { font-family: var(--font-mono); font-size: 11px; color: var(--color-text-faint); flex-shrink: 0; }

/* ---- Demo panel ---- */
.demo-panel { width: 100%; max-width: 400px; }
.panel-decode, .panel-script {
  background: var(--color-bg-raised);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-6);
}
.panel-decode h2, .panel-script h2 { font-size: var(--fs-h3); margin-bottom: var(--space-4); }
.panel-script[hidden] { display: none; }
.structure-list { display: flex; flex-direction: column; }
.structure-item {
  display: flex;
  gap: var(--space-3);
  padding-block: var(--space-3);
  border-bottom: 1px solid var(--color-border);
  opacity: 0;
  transform: translateY(6px);
  transition: opacity var(--duration-base) var(--ease-out), transform var(--duration-base) var(--ease-out);
}
.structure-item.is-visible { opacity: 1; transform: none; }
.structure-item:last-child { border-bottom: none; }
.structure-dot { width: 9px; height: 9px; border-radius: 50%; margin-top: 6px; flex-shrink: 0; background: var(--color-accent); opacity: 0.85; }
.structure-item strong { display: block; margin-bottom: 2px; }
.structure-item p { color: var(--color-text-muted); font-size: var(--fs-small); }
.btn-reveal-script { margin-top: var(--space-4); width: 100%; }
.btn-reveal-script:not(:disabled) { animation: none; }

.script-list { display: flex; flex-direction: column; gap: var(--space-4); counter-reset: script-step; }
.script-list li { border-left: 2px solid var(--color-accent-line); padding-left: var(--space-4); }
.script-tag { display: block; font-size: 11px; font-weight: 700; letter-spacing: 0.04em; text-transform: uppercase; color: var(--color-accent); margin-bottom: 2px; }
.script-list p { color: var(--color-text-muted); font-size: var(--fs-small); }
.script-closing { margin-top: var(--space-6); font-weight: 600; color: var(--color-text); }
.btn-back-structure { margin-top: var(--space-4); width: 100%; }

@media (min-width: 1024px) {
  .hero-inner { flex-direction: row; align-items: center; gap: var(--space-12); }
  .hero-copy { flex: 1 1 46%; }
  .hero-demo { flex: 1 1 54%; }
  .demo-player { flex-direction: row; align-items: flex-start; gap: var(--space-8); }
  .player-frame { flex: 0 0 300px; }
  .demo-panel { flex: 1 1 340px; max-width: 420px; margin-top: var(--space-6); }
}

@media (prefers-reduced-motion: reduce) {
  .scan-line, .rec-dot, .waveform-bar { animation: none !important; }
  .scan-line::after { display: none; }
}

/* ==========================================================================
   PROBLEM
   ========================================================================== */
.problem-text { max-width: 44rem; color: var(--color-text-muted); margin-bottom: var(--space-12); }
.compare-grid { display: grid; gap: var(--space-6); margin-bottom: var(--space-12); }
.compare-card {
  background: var(--color-bg-raised);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: var(--space-6);
}
.compare-card h3 { margin-bottom: var(--space-4); }
.compare-card p { color: var(--color-text-muted); font-size: var(--fs-small); margin-top: var(--space-4); }
.mini-video-card {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  padding: var(--space-3);
  border-radius: var(--radius-sm);
  background: linear-gradient(135deg, var(--color-bg-raised-2), rgba(247, 247, 248, 0.04));
  border: 1px solid var(--color-border);
  margin-bottom: var(--space-3);
}
.mini-video-play {
  flex-shrink: 0;
  width: 32px; height: 32px;
  border-radius: 50%;
  background: var(--color-accent-dim);
  color: var(--color-accent);
  display: flex; align-items: center; justify-content: center;
  font-size: 11px;
}
.mini-video-info { display: flex; flex-direction: column; gap: 2px; min-width: 0; }
.mini-video-info strong { font-size: var(--fs-small); }
.mini-video-info span { font-size: 11px; color: var(--color-text-faint); }
.mini-timeline { margin-bottom: var(--space-4); }
.mini-timeline-label { display: block; font-size: var(--fs-small); color: var(--color-text-muted); margin-bottom: var(--space-2); }
.mini-timeline-track { height: 28px; border-radius: var(--radius-sm); background: var(--color-bg-raised-2); position: relative; overflow: hidden; }
.mini-timeline-track--flat::after {
  content: ''; position: absolute; inset: 0; margin: auto 0; height: 2px;
  background: rgba(247, 247, 248, 0.3);
}
.mini-timeline-track--peaks::after {
  content: '';
  position: absolute; left: 0; right: 0; top: 0; bottom: 0;
  background: repeating-linear-gradient(90deg, transparent 0 12%, var(--color-accent) 12% 15%, transparent 15% 30%);
  opacity: 0.7;
}
.problem-conclusion { font-size: var(--fs-h3); font-weight: 600; text-align: center; }

/* ==========================================================================
   BELIEF
   ========================================================================== */
.belief-highlight {
  font-size: var(--fs-h3);
  font-weight: 600;
  max-width: 40rem;
  margin-bottom: var(--space-12);
}
.see-do-grid { display: flex; flex-direction: column; gap: var(--space-4); }
.see-do-pair {
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  align-items: center;
  gap: var(--space-4);
}
.see-do-block {
  background: var(--color-bg-raised);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: var(--space-4) var(--space-5);
}
.see-do-block--accent { border-color: var(--color-accent-line); background: var(--color-accent-dim); }
.see-do-tag { display: block; font-size: 11px; font-weight: 700; text-transform: uppercase; letter-spacing: 0.04em; color: var(--color-text-faint); margin-bottom: 4px; }
.see-do-block--accent .see-do-tag { color: var(--color-accent); }
.see-do-arrow { color: var(--color-accent); font-size: 1.25rem; }

/* ==========================================================================
   DNA
   ========================================================================== */
.dna-inner { display: flex; flex-direction: column-reverse; gap: var(--space-12); align-items: center; }
.dna-list { display: flex; flex-direction: column; gap: var(--space-4); margin-block: var(--space-8); }
.dna-list li { border-left: 2px solid var(--color-border-strong); padding-left: var(--space-4); }
.dna-list strong { display: block; margin-bottom: 2px; }
.dna-list p { color: var(--color-text-muted); font-size: var(--fs-small); }
.dna-final { font-size: var(--fs-h3); font-weight: 600; }
.dna-visual { width: 100%; max-width: 260px; }
.helix-hero { width: 100%; height: auto; filter: drop-shadow(0 0 14px rgba(91, 140, 255, 0.25)); }
.helix-strand { stroke-dasharray: 600; stroke-dashoffset: 600; transition: stroke-dashoffset 1.4s var(--ease-out); }
.helix-rung { stroke: rgba(247, 247, 248, 0.3); stroke-width: 2.5; stroke-linecap: round; opacity: 0; transform: scaleX(0.6); transform-box: fill-box; transform-origin: center; transition: opacity 400ms var(--ease-out), transform 400ms var(--ease-out); transition-delay: calc(var(--i) * 110ms); }
.helix-node { opacity: 0; transition: opacity 500ms var(--ease-out); }
.helix-node--blue { fill: var(--color-helix-blue); }
.helix-node--purple { fill: var(--color-helix-purple); }
.helix-node--coral { fill: var(--color-helix-coral); }
.helix-hero.is-active .helix-strand { stroke-dashoffset: 0; }
.helix-hero.is-active .helix-rung { opacity: 1; transform: scaleX(1); }
.helix-hero.is-active .helix-node { opacity: 1; transition-delay: 300ms; }

@media (prefers-reduced-motion: reduce) {
  .helix-strand, .helix-rung, .helix-node { transition: none !important; stroke-dashoffset: 0 !important; opacity: 1 !important; transform: none !important; }
}

@media (min-width: 1024px) {
  .dna-inner { flex-direction: row; align-items: center; }
  .dna-copy { flex: 1 1 55%; }
  .dna-visual { flex: 1 1 40%; max-width: 320px; }
}

/* ==========================================================================
   DEMO (full breakdown)
   ========================================================================== */
.decode-table { display: flex; flex-direction: column; gap: var(--space-4); margin-bottom: var(--space-12); counter-reset: decode-step; }
.decode-row {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: var(--space-4);
  align-items: start;
  background: var(--color-bg-raised);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: var(--space-5);
  cursor: pointer;
  transition: border-color var(--duration-base) var(--ease-out), transform var(--duration-base) var(--ease-out);
}
.decode-row:hover, .decode-row:focus-visible { border-color: var(--color-accent-line); transform: translateY(-2px); }
.decode-row-time { font-family: var(--font-mono); font-size: var(--fs-small); color: var(--color-accent); font-weight: 700; white-space: nowrap; padding-top: 2px; }
.decode-row-body h3 { font-size: 1rem; margin-bottom: var(--space-2); }
.decode-row-grid { display: grid; gap: var(--space-3); margin-top: var(--space-3); }
.decode-row-grid dt { font-size: 11px; font-weight: 700; text-transform: uppercase; letter-spacing: 0.04em; color: var(--color-text-faint); }
.decode-row-grid dd { color: var(--color-text-muted); font-size: var(--fs-small); margin-top: 2px; }

.decode-chain-flow { display: flex; flex-wrap: wrap; align-items: center; gap: var(--space-2); font-size: var(--fs-small); }
.decode-chain-flow .chip { background: var(--color-bg-raised); border: 1px solid var(--color-border-strong); padding: var(--space-2) var(--space-4); border-radius: var(--radius-pill); }
.decode-chain-flow .chip--reward { border-color: var(--color-accent-line); color: var(--color-accent); }
.decode-chain-flow .arrow { color: var(--color-text-faint); }
.decode-chain-function { margin-top: var(--space-4); color: var(--color-text-muted); font-size: var(--fs-small); }

@media (min-width: 768px) {
  .decode-row { grid-template-columns: 90px 1fr; }
  .decode-row-grid { grid-template-columns: repeat(3, 1fr); }
}

/* ==========================================================================
   MECHANISM → SCRIPT
   ========================================================================== */
.mapping-list { display: flex; flex-direction: column; gap: var(--space-4); margin-bottom: var(--space-12); }
.mapping-row { display: grid; grid-template-columns: 1fr auto 1fr; align-items: center; gap: var(--space-4); }
.mapping-col { background: var(--color-bg-raised); border: 1px solid var(--color-border); border-radius: var(--radius-md); padding: var(--space-4) var(--space-5); }
.mapping-col--accent { border-color: var(--color-accent-line); background: var(--color-accent-dim); }
.mapping-tag { display: block; font-size: 11px; font-weight: 700; text-transform: uppercase; letter-spacing: 0.04em; color: var(--color-text-faint); margin-bottom: 4px; }
.mapping-col--accent .mapping-tag { color: var(--color-accent); }
.mapping-arrow { color: var(--color-accent); font-size: 1.25rem; }
.adapted-script-card {
  background: var(--color-bg-raised);
  border: 1px solid var(--color-border-strong);
  border-radius: var(--radius-lg);
  padding: var(--space-8);
  max-width: 42rem;
}
.script-list--wide { gap: var(--space-4); }
.adapted-script-card .script-closing { color: var(--color-text-muted); font-weight: 600; margin-top: var(--space-6); }

/* ==========================================================================
   METHOD
   ========================================================================== */
.method-steps { display: flex; flex-direction: column; gap: var(--space-6); margin-bottom: var(--space-12); }
.method-steps li { display: flex; gap: var(--space-5); align-items: flex-start; position: relative; padding-left: var(--space-2); }
.method-steps li:not(:last-child)::before {
  content: '';
  position: absolute;
  left: calc(var(--space-2) + 17px);
  top: 40px; bottom: -24px;
  width: 2px;
  background: var(--color-border-strong);
}
.method-index {
  flex-shrink: 0;
  width: 36px; height: 36px;
  border-radius: 50%;
  background: var(--color-accent-dim);
  color: var(--color-accent);
  border: 1px solid var(--color-accent-line);
  display: flex; align-items: center; justify-content: center;
  font-weight: 700;
  z-index: 1;
}
.method-steps h3 { font-size: 1.05rem; margin-bottom: var(--space-2); }
.method-steps p { color: var(--color-text-muted); }
.method-flow { display: flex; flex-wrap: wrap; gap: var(--space-2); align-items: center; font-size: var(--fs-small); color: var(--color-text-muted); }
.method-flow span:not(.method-flow-final) { background: var(--color-bg-raised); border: 1px solid var(--color-border); padding: var(--space-2) var(--space-4); border-radius: var(--radius-pill); }
.method-flow-final { color: var(--color-accent); font-weight: 700; }

/* ==========================================================================
   COMPARISON
   ========================================================================== */
.comparison-grid { display: grid; gap: var(--space-6); margin-bottom: var(--space-8); }
.comparison-card { background: var(--color-bg-raised); border: 1px solid var(--color-border); border-radius: var(--radius-lg); padding: var(--space-8); }
.comparison-card--accent { border-color: var(--color-accent-line); background: var(--color-accent-dim); }
.comparison-card h3 { margin-bottom: var(--space-4); }
.comparison-list { display: flex; flex-direction: column; gap: var(--space-3); color: var(--color-text-muted); font-size: var(--fs-small); }
.comparison-list li { padding-left: var(--space-4); position: relative; }
.comparison-list li::before { content: '—'; position: absolute; left: 0; color: var(--color-text-faint); }
.comparison-card--accent .comparison-list li::before { content: '✓'; color: var(--color-accent); }
.comparison-final { font-size: var(--fs-h3); font-weight: 600; }

/* ==========================================================================
   DELIVERABLES / AUDIENCE / NOT-THIS (shared card grids)
   ========================================================================== */
.deliverables-grid, .audience-grid { display: grid; gap: var(--space-6); margin-bottom: var(--space-8); }
.card--accent { border-color: var(--color-accent-line); background: var(--color-accent-dim); }
.card code { font-family: var(--font-mono); font-size: 0.7rem; color: var(--color-accent); }
.deliverables-reassurance { font-size: var(--fs-h3); font-weight: 600; }

.qualification { background: var(--color-bg-raised); border: 1px solid var(--color-border); border-radius: var(--radius-lg); padding: var(--space-8); }
.qualification h3 { margin-bottom: var(--space-4); }
.qualification-list { display: flex; flex-direction: column; gap: var(--space-3); color: var(--color-text-muted); }
.check-icon { color: var(--color-success); font-weight: 700; margin-right: var(--space-2); }
.cross-icon {
  color: #FF5F6D;
  font-weight: 800;
  margin-right: var(--space-2);
  text-shadow: 0 0 16px rgba(255, 95, 109, 0.32);
}

.not-this-list { display: grid; gap: var(--space-3); margin-bottom: var(--space-8); }
.not-this-list li { display: flex; align-items: flex-start; gap: var(--space-2); color: var(--color-text-muted); }
.not-this-conclusion { font-size: var(--fs-h3); font-weight: 600; }
.not-this-conclusion .conclusion-label { color: var(--color-text); }
.not-this-conclusion .conclusion-value { color: var(--color-accent); }

@media (min-width: 640px) {
  .deliverables-grid, .audience-grid, .comparison-grid, .compare-grid { grid-template-columns: repeat(2, 1fr); }
  .not-this-list { grid-template-columns: repeat(2, 1fr); }
}
@media (min-width: 1024px) {
  .deliverables-grid { grid-template-columns: repeat(3, 1fr); }
}

/* ==========================================================================
   FINAL CTA / FORM
   ========================================================================== */
.final-cta-inner { display: flex; flex-direction: column; gap: var(--space-12); }
.final-cta-list { display: flex; flex-direction: column; gap: var(--space-2); margin-block: var(--space-6); color: var(--color-text-muted); }
.final-cta-reassurance { font-weight: 600; }

.contact-form { display: flex; flex-direction: column; gap: var(--space-4); background: var(--color-bg-raised); border: 1px solid var(--color-border); border-radius: var(--radius-lg); padding: var(--space-8); }
.form-field { display: flex; flex-direction: column; gap: var(--space-2); }
.form-field label { font-size: var(--fs-small); font-weight: 600; color: var(--color-text-muted); }
.form-field input, .form-field textarea {
  background: var(--color-bg-raised-2);
  border: 1px solid var(--color-border-strong);
  border-radius: var(--radius-sm);
  padding: var(--space-3) var(--space-4);
  color: var(--color-text);
  resize: vertical;
}
.form-field input::placeholder, .form-field textarea::placeholder { color: var(--color-text-faint); }
.form-field input:focus, .form-field textarea:focus { border-color: var(--color-accent); }
.form-field input[aria-invalid="true"], .form-field textarea[aria-invalid="true"] { border-color: var(--color-error); }
.field-error { color: var(--color-error); font-size: var(--fs-small); }
.field-help { color: var(--color-text-faint); font-size: var(--fs-small); }
.form-submit { margin-top: var(--space-2); }
.form-submit[data-loading] { opacity: 0.7; pointer-events: none; }
.form-status { font-size: var(--fs-small); }
.form-status[data-state="error"] { color: var(--color-error); }
.form-status[data-state="error"] a { text-decoration: underline; }

.form-success { background: var(--color-bg-raised); border: 1px solid var(--color-accent-line); border-radius: var(--radius-lg); padding: var(--space-8); text-align: center; }
.form-success[hidden] { display: none; }
.form-success h3 { margin-bottom: var(--space-3); }
.form-success p { color: var(--color-text-muted); }

@media (min-width: 1024px) {
  .final-cta-inner { flex-direction: row; }
  .final-cta-copy { flex: 1 1 45%; }
  .final-cta-form-wrap { flex: 1 1 55%; }
}

/* ==========================================================================
   FAQ
   ========================================================================== */
.faq-list { display: flex; flex-direction: column; gap: var(--space-3); max-width: 46rem; }
.faq-item { background: var(--color-bg-raised); border: 1px solid var(--color-border); border-radius: var(--radius-md); padding: var(--space-5) var(--space-6); }
.faq-item summary {
  cursor: pointer;
  font-weight: 600;
  list-style: none;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-4);
}
.faq-item summary::-webkit-details-marker { display: none; }
.faq-item summary::after {
  content: '+';
  font-size: 1.25rem;
  color: var(--color-accent);
  flex-shrink: 0;
  transition: transform var(--duration-base) var(--ease-out);
}
.faq-item[open] summary::after { transform: rotate(45deg); }
.faq-item p { color: var(--color-text-muted); margin-top: var(--space-4); }

/* ========================================================================== 
   VISUAL HIERARCHY PASS
   ========================================================================== */
.problem, .dna, .mech-script, .comparison, .audience {
  background: linear-gradient(180deg, rgba(255,255,255,0.018), rgba(255,255,255,0.035));
  border-block: 1px solid var(--color-border);
}

.section-head { position: relative; }
.section-head::before {
  display: block;
  margin-bottom: var(--space-3);
  color: var(--color-accent);
  font-size: 0.72rem;
  font-weight: 800;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}
.problem .section-head::before { content: 'Le constat'; }
.belief .section-head::before { content: 'Notre conviction'; }
.dna .section-head::before { content: 'L’ADN de l’attention'; }
.demo-full .section-head::before { content: 'Démonstration'; }
.mech-script .section-head::before { content: 'L’adaptation'; }
.method .section-head::before { content: 'La méthode'; }
.comparison .section-head::before { content: 'La différence'; }
.deliverables .section-head::before { content: 'Vos livrables'; }
.audience .section-head::before { content: 'Pour qui'; }
.not-this .section-head::before { content: 'Notre engagement'; }
.faq .section-head::before { content: 'Besoin de précisions ?'; }

h2.section-title {
  max-width: 20ch;
  letter-spacing: -0.028em;
  text-wrap: balance;
}
.section-sub { line-height: 1.7; }
.problem-conclusion, .belief-highlight, .dna-final, .comparison-final,
.deliverables-reassurance, .not-this-conclusion {
  border-left: 3px solid var(--color-accent);
  padding: var(--space-4) 0 var(--space-4) var(--space-6);
  color: var(--color-text);
}

.card, .compare-card, .decode-row, .comparison-card, .qualification, .faq-item,
.mapping-col, .see-do-block, .adapted-script-card {
  box-shadow: 0 18px 45px rgba(0,0,0,0.14);
}
.card--accent, .comparison-card--accent, .mapping-col--accent, .see-do-block--accent {
  box-shadow: inset 3px 0 0 var(--color-accent), 0 18px 45px rgba(0,0,0,0.16);
}
.deliverables-grid .card h3, .audience-grid .card h3 { margin-bottom: var(--space-3); }

.final-cta { position: relative; overflow: hidden; background: var(--color-bg); }
.final-cta::before {
  content: none;
}
.final-cta-inner { position: relative; z-index: 1; align-items: center; }
.final-cta-copy .section-title { max-width: 13ch; }
.final-cta-copy .section-title::before {
  content: 'Passez de l’inspiration au script';
  display: block;
  margin-bottom: var(--space-3);
  color: var(--color-accent);
  font-size: 0.72rem;
  font-weight: 800;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}
.contact-form {
  border-color: var(--color-border-strong);
  box-shadow: 0 28px 70px rgba(0,0,0,0.34), 0 0 60px rgba(139,107,255,0.035);
}
.form-field input:focus, .form-field textarea:focus {
  outline: 2px solid rgba(255,84,54,0.16);
  border-color: var(--color-accent);
}
.form-submit { min-height: 54px; font-size: 1rem; font-weight: 800; }

@media (max-width: 639px) {
  section { padding-block: var(--space-16); }
  .hero { padding-top: var(--space-12); }
  .hero-copy h1 { max-width: none; font-size: clamp(2.25rem, 11vw, 3.25rem); }
  .hero-actions { align-items: stretch; flex-direction: column; }
  .hero-actions .btn { width: 100%; }
  .hero-actions .btn-secondary { min-height: 44px; }
  .section-head { margin-bottom: var(--space-8); }
  .contact-form, .adapted-script-card, .comparison-card, .qualification { padding: var(--space-6); }
  .see-do-pair, .mapping-row { grid-template-columns: 1fr; }
  .see-do-arrow, .mapping-arrow { transform: rotate(90deg); justify-self: center; }
}