/* ================================================================
   GRD Pro – Design System
   Royal Blue + Gold | Editorial / Boutique Consultancy
   ================================================================ */

:root {
  /* Type scale (fluid) */
  --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, 5rem);
  --text-hero: clamp(3rem, 1.5rem + 5vw, 6.5rem);

  /* Spacing (4px 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-10: 2.5rem;
  --space-12: 3rem;
  --space-16: 4rem;
  --space-20: 5rem;
  --space-24: 6rem;
  --space-32: 8rem;

  /* Radius */
  --radius-sm: 0.25rem;
  --radius-md: 0.5rem;
  --radius-lg: 0.75rem;
  --radius-xl: 1rem;
  --radius-full: 9999px;

  /* Transitions */
  --transition-interactive: 220ms cubic-bezier(0.16, 1, 0.3, 1);
  --transition-slow: 600ms cubic-bezier(0.16, 1, 0.3, 1);

  /* Content widths */
  --content-narrow: 680px;
  --content-default: 1080px;
  --content-wide: 1280px;

  /* Fonts */
  --font-display: 'Cormorant Garamond', 'Times New Roman', Georgia, serif;
  --font-body: 'Inter', 'Helvetica Neue', Arial, sans-serif;
  --font-mono: 'JetBrains Mono', ui-monospace, monospace;
}

/* ===== LIGHT (default) — restrained editorial palette ===== */
:root,
[data-theme='light'] {
  /* Royal Blues */
  --color-bg:           #f7f6f1;        /* warm ivory */
  --color-surface:      #ffffff;
  --color-surface-2:    #f1efe8;
  --color-surface-3:    #e9e6dd;
  --color-divider:      #dcd7c9;
  --color-border:       #cfc9b6;

  --color-text:         #0a1633;        /* royal navy text */
  --color-text-muted:   #4a5573;
  --color-text-faint:   #8a8f9d;
  --color-text-inverse: #f7f6f1;

  /* Royal Blue (primary) */
  --color-primary:      #0a2472;        /* deep royal */
  --color-primary-2:    #143d8a;
  --color-primary-hover:#0a1f5f;
  --color-primary-soft: #e3e7f3;
  --color-primary-ink:  #050d2a;

  /* Gold (accent) */
  --color-gold:         #b08537;        /* aged gold */
  --color-gold-2:       #c9a14d;        /* champagne */
  --color-gold-3:       #d8b86a;
  --color-gold-soft:    #f4ead4;
  --color-gold-ink:     #5a3f10;

  /* Functional */
  --color-success: #2f6b3b;
  --color-warning: #8a5a16;
  --color-error:   #8b2226;

  /* Shadows */
  --shadow-sm: 0 1px 2px rgba(10, 22, 51, 0.06);
  --shadow-md: 0 8px 24px rgba(10, 22, 51, 0.08);
  --shadow-lg: 0 24px 60px rgba(10, 22, 51, 0.14);

  --grain-opacity: 0.035;
}

/* ===== DARK — midnight royal ===== */
[data-theme='dark'] {
  --color-bg:           #060a1c;
  --color-surface:      #0b1230;
  --color-surface-2:    #0f1838;
  --color-surface-3:    #142049;
  --color-divider:      #1c2a5b;
  --color-border:       #243670;

  --color-text:         #ece6d3;
  --color-text-muted:   #9aa2bb;
  --color-text-faint:   #5b637c;
  --color-text-inverse: #060a1c;

  --color-primary:      #6d8aff;
  --color-primary-2:    #4a66db;
  --color-primary-hover:#8aa0ff;
  --color-primary-soft: #1a2756;
  --color-primary-ink:  #ece6d3;

  --color-gold:         #d8b86a;
  --color-gold-2:       #e9cf86;
  --color-gold-3:       #f0dca0;
  --color-gold-soft:    #2a2310;
  --color-gold-ink:     #f4ead4;

  --shadow-sm: 0 1px 2px rgba(0,0,0,0.4);
  --shadow-md: 0 8px 24px rgba(0,0,0,0.45);
  --shadow-lg: 0 24px 60px rgba(0,0,0,0.55);

  --grain-opacity: 0.06;
}

/* ===== Base ===== */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html {
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
  scroll-behavior: smooth;
  scroll-padding-top: 96px;
}
body {
  min-height: 100dvh;
  line-height: 1.6;
  font-family: var(--font-body);
  font-size: var(--text-base);
  color: var(--color-text);
  background-color: var(--color-bg);
  font-feature-settings: "ss01", "cv11";
  overflow-x: hidden;
}
img, picture, video, canvas, svg { display: block; max-width: 100%; height: auto; }
ul[role='list'], ol[role='list'] { list-style: none; }
input, button, textarea, select { font: inherit; color: inherit; }
button { cursor: pointer; background: none; border: none; }
a { color: inherit; text-decoration: none; }
table { border-collapse: collapse; width: 100%; }

h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-display);
  font-weight: 500;
  letter-spacing: -0.015em;
  line-height: 1.1;
  text-wrap: balance;
  color: var(--color-text);
}
p { text-wrap: pretty; max-width: 72ch; }

::selection { background: var(--color-gold); color: var(--color-primary-ink); }
:focus-visible {
  outline: 2px solid var(--color-gold);
  outline-offset: 3px;
  border-radius: var(--radius-sm);
}

a, button, [role='button'], input, textarea, select {
  transition: color var(--transition-interactive),
              background var(--transition-interactive),
              border-color var(--transition-interactive),
              box-shadow var(--transition-interactive),
              transform var(--transition-interactive);
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
}

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

/* ================================================================
   LAYOUT
   ================================================================ */
.container {
  width: 100%;
  max-width: var(--content-wide);
  margin-inline: auto;
  padding-inline: clamp(var(--space-4), 4vw, var(--space-12));
}
.container--narrow { max-width: var(--content-default); }

section { position: relative; }

.section {
  padding-block: clamp(var(--space-16), 9vw, var(--space-32));
}
.section--tight {
  padding-block: clamp(var(--space-12), 6vw, var(--space-20));
}

/* ================================================================
   HEADER / NAV
   ================================================================ */
.header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: color-mix(in oklab, var(--color-bg) 88%, transparent);
  backdrop-filter: blur(14px) saturate(140%);
  -webkit-backdrop-filter: blur(14px) saturate(140%);
  border-bottom: 1px solid transparent;
  transition: border-color var(--transition-interactive),
              background var(--transition-interactive);
}
.header.is-scrolled {
  border-bottom-color: var(--color-divider);
  background: color-mix(in oklab, var(--color-bg) 95%, transparent);
}
.header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-6);
  height: 80px;
  width: 100%;
  max-width: var(--content-wide);
  margin-inline: auto;
  padding-inline: clamp(var(--space-4), 4vw, var(--space-12));
}
.brand {
  display: inline-flex;
  align-items: center;
  gap: var(--space-3);
  color: var(--color-text);
  flex-shrink: 0;
}
.brand__mark { width: 36px; height: 36px; flex-shrink: 0; }
.brand__name {
  font-family: var(--font-display);
  font-size: 1.35rem;
  font-weight: 500;
  letter-spacing: 0.02em;
  line-height: 1;
}
.brand__name em {
  font-style: italic;
  color: var(--color-gold);
  font-weight: 400;
}

.nav { display: flex; align-items: center; gap: var(--space-1); }
.nav__list {
  display: flex;
  align-items: center;
  gap: var(--space-1);
  list-style: none;
}
.nav__link {
  display: inline-flex;
  align-items: center;
  padding: var(--space-2) var(--space-4);
  font-size: var(--text-sm);
  font-weight: 500;
  color: var(--color-text-muted);
  border-radius: var(--radius-sm);
  position: relative;
}
.nav__link:hover,
.nav__link[aria-current='page'] { color: var(--color-text); }
.nav__link[aria-current='page']::after {
  content: '';
  position: absolute;
  bottom: 4px; left: var(--space-4); right: var(--space-4);
  height: 1px;
  background: var(--color-gold);
}

.nav__cta {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-3) var(--space-5);
  font-size: var(--text-sm);
  font-weight: 500;
  color: var(--color-text-inverse);
  background: var(--color-primary);
  border-radius: var(--radius-full);
  border: 1px solid var(--color-primary);
}
.nav__cta:hover {
  background: var(--color-primary-hover);
  transform: translateY(-1px);
  box-shadow: var(--shadow-md);
}

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

.menu-toggle { display: none; }

@media (max-width: 960px) {
  .nav__list { display: none; }
  .menu-toggle {
    display: inline-flex;
    width: 40px; height: 40px;
    align-items: center; justify-content: center;
    border-radius: var(--radius-full);
    border: 1px solid var(--color-divider);
    color: var(--color-text);
  }
  .nav.is-open .nav__list {
    display: flex;
    flex-direction: column;
    align-items: stretch;
    position: fixed;
    inset: 80px 0 auto 0;
    background: var(--color-bg);
    border-bottom: 1px solid var(--color-divider);
    padding: var(--space-6);
    gap: var(--space-2);
    z-index: 90;
  }
  .nav.is-open .nav__link {
    padding: var(--space-3) var(--space-2);
    font-size: var(--text-base);
    border-bottom: 1px solid var(--color-divider);
  }
  .nav__cta { display: none; }
}

/* ================================================================
   HERO
   ================================================================ */
.hero {
  position: relative;
  padding-top: clamp(var(--space-16), 10vw, var(--space-32));
  padding-bottom: clamp(var(--space-16), 10vw, var(--space-32));
  overflow: hidden;
  isolation: isolate;
}
.hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background:
    radial-gradient(900px 600px at 80% 0%, color-mix(in oklab, var(--color-gold) 18%, transparent), transparent 60%),
    radial-gradient(800px 500px at 0% 100%, color-mix(in oklab, var(--color-primary) 22%, transparent), transparent 65%);
  z-index: -1;
  opacity: 0.7;
}
.hero::after {
  content: '';
  position: absolute;
  inset: 0;
  background-image: url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' width='200' height='200'><filter id='n'><feTurbulence type='fractalNoise' baseFrequency='0.85' numOctaves='2' /></filter><rect width='100%' height='100%' filter='url(%23n)' opacity='0.6'/></svg>");
  opacity: var(--grain-opacity);
  z-index: -1;
  pointer-events: none;
}

.hero__inner {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(var(--space-8), 4vw, var(--space-16));
  align-items: end;
}
@media (min-width: 960px) {
  .hero__inner {
    grid-template-columns: 1.4fr 1fr;
  }
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: var(--space-3);
  font-family: var(--font-body);
  font-size: var(--text-xs);
  font-weight: 500;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--color-gold);
  margin-bottom: var(--space-6);
}
.eyebrow::before {
  content: '';
  width: 28px;
  height: 1px;
  background: var(--color-gold);
}

.hero__title {
  font-size: var(--text-hero);
  font-weight: 400;
  line-height: 1.02;
  letter-spacing: -0.025em;
  margin-bottom: var(--space-6);
}
.hero__title em {
  font-style: italic;
  color: var(--color-gold);
}
.hero__subtitle {
  font-family: var(--font-display);
  font-size: var(--text-xl);
  font-weight: 400;
  font-style: italic;
  color: var(--color-text-muted);
  margin-bottom: var(--space-8);
  max-width: 30ch;
  line-height: 1.25;
}
.hero__lede {
  font-size: var(--text-base);
  color: var(--color-text-muted);
  max-width: 56ch;
  margin-bottom: var(--space-10);
  line-height: 1.7;
}

.hero__aside {
  border-left: 1px solid var(--color-divider);
  padding-left: clamp(var(--space-6), 3vw, var(--space-10));
  display: flex;
  flex-direction: column;
  gap: var(--space-6);
}
@media (max-width: 960px) {
  .hero__aside {
    border-left: none;
    padding-left: 0;
    border-top: 1px solid var(--color-divider);
    padding-top: var(--space-8);
  }
}

.hero__stat {
  display: flex;
  flex-direction: column;
  gap: var(--space-1);
}
.hero__stat-value {
  font-family: var(--font-display);
  font-size: var(--text-2xl);
  font-weight: 500;
  color: var(--color-text);
  line-height: 1;
}
.hero__stat-label {
  font-size: var(--text-xs);
  color: var(--color-text-muted);
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

/* CTAs */
.cta-row { display: flex; flex-wrap: wrap; gap: var(--space-3); align-items: center; }

.btn {
  display: inline-flex;
  align-items: center;
  gap: var(--space-3);
  padding: var(--space-4) var(--space-8);
  font-size: var(--text-sm);
  font-weight: 500;
  letter-spacing: 0.02em;
  border-radius: var(--radius-full);
  border: 1px solid transparent;
  white-space: nowrap;
}
.btn--primary {
  background: var(--color-primary);
  color: var(--color-text-inverse);
  border-color: var(--color-primary);
}
.btn--primary:hover {
  background: var(--color-primary-hover);
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}
.btn--gold {
  background: linear-gradient(135deg, var(--color-gold-2), var(--color-gold));
  color: var(--color-primary-ink);
  border-color: var(--color-gold);
}
.btn--gold:hover {
  filter: brightness(1.05);
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}
.btn--ghost {
  background: transparent;
  color: var(--color-text);
  border-color: var(--color-divider);
}
.btn--ghost:hover {
  border-color: var(--color-gold);
  color: var(--color-text);
}
.btn__arrow {
  width: 16px;
  height: 16px;
  transition: transform var(--transition-interactive);
}
.btn:hover .btn__arrow { transform: translateX(4px); }

/* ================================================================
   SECTION HEADERS
   ================================================================ */
.section-head {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-8);
  margin-bottom: clamp(var(--space-10), 6vw, var(--space-16));
  padding-bottom: var(--space-8);
  border-bottom: 1px solid var(--color-divider);
}
@media (min-width: 960px) {
  .section-head {
    grid-template-columns: 1fr 1.6fr;
    align-items: end;
  }
}
.section-head__title {
  font-size: var(--text-2xl);
  font-weight: 400;
  letter-spacing: -0.02em;
}
.section-head__title em { font-style: italic; color: var(--color-gold); }
.section-head__lede {
  font-size: var(--text-lg);
  color: var(--color-text-muted);
  font-family: var(--font-display);
  font-style: italic;
  font-weight: 400;
  line-height: 1.4;
  max-width: 60ch;
}

.section-num {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.2em;
  color: var(--color-gold);
  text-transform: uppercase;
}

/* ================================================================
   PROBLEM SECTION
   ================================================================ */
.prose {
  max-width: 72ch;
  font-size: var(--text-base);
  color: var(--color-text-muted);
  line-height: 1.75;
}
.prose > * + * { margin-top: var(--space-5); }
.prose strong, .prose b { color: var(--color-text); font-weight: 600; }
.prose em { color: var(--color-text); font-style: italic; }

.prose--lg { font-size: var(--text-lg); line-height: 1.6; }

/* ================================================================
   PILLARS GRID (Wofür wir stehen)
   ================================================================ */
.pillars {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1px;
  background: var(--color-divider);
  border: 1px solid var(--color-divider);
}
@media (min-width: 720px) { .pillars { grid-template-columns: 1fr 1fr; } }
@media (min-width: 1080px) { .pillars { grid-template-columns: repeat(5, 1fr); } }

.pillar {
  background: var(--color-surface);
  padding: clamp(var(--space-6), 2.5vw, var(--space-10));
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
  position: relative;
  transition: background var(--transition-interactive);
}
.pillar:hover { background: var(--color-surface-2); }
.pillar__icon {
  width: 36px; height: 36px;
  color: var(--color-gold);
}
.pillar__title {
  font-family: var(--font-display);
  font-size: var(--text-lg);
  font-weight: 500;
  color: var(--color-text);
  line-height: 1.2;
}
.pillar__desc {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  line-height: 1.6;
}

/* ================================================================
   ARCHITECTURE / PRODUCTS
   ================================================================ */
.products {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-4);
}
@media (min-width: 720px) { .products { grid-template-columns: 1fr 1fr; } }

.product-card {
  position: relative;
  background: var(--color-surface);
  border: 1px solid var(--color-divider);
  border-radius: var(--radius-lg);
  padding: clamp(var(--space-8), 3vw, var(--space-10));
  display: flex;
  flex-direction: column;
  gap: var(--space-5);
  overflow: hidden;
  isolation: isolate;
  transition: border-color var(--transition-interactive),
              transform var(--transition-interactive),
              box-shadow var(--transition-interactive);
}
.product-card::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, color-mix(in oklab, var(--color-primary) 6%, transparent), transparent 50%);
  z-index: -1;
  opacity: 0;
  transition: opacity var(--transition-interactive);
}
.product-card:hover {
  transform: translateY(-4px);
  border-color: var(--color-gold);
  box-shadow: var(--shadow-lg);
}
.product-card:hover::before { opacity: 1; }

.product-card__num {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  color: var(--color-gold);
  letter-spacing: 0.2em;
}
.product-card__title {
  font-family: var(--font-display);
  font-size: var(--text-xl);
  font-weight: 500;
  color: var(--color-text);
  line-height: 1.15;
}
.product-card__title sup {
  font-size: 0.5em;
  vertical-align: super;
  color: var(--color-gold);
  font-weight: 400;
  margin-left: 2px;
}
.product-card__sub {
  font-size: var(--text-sm);
  color: var(--color-gold);
  font-style: italic;
  font-family: var(--font-display);
  font-weight: 400;
}
.product-card__desc {
  font-size: var(--text-base);
  color: var(--color-text-muted);
  line-height: 1.65;
  flex: 1;
}
.product-card__more {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  font-size: var(--text-sm);
  font-weight: 500;
  color: var(--color-text);
  margin-top: auto;
}
.product-card__more::after {
  content: '→';
  transition: transform var(--transition-interactive);
}
.product-card:hover .product-card__more::after { transform: translateX(4px); }
.product-card__more:hover { color: var(--color-gold); }

/* ================================================================
   FOR WHOM (Audience list)
   ================================================================ */
.audience {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-3);
  list-style: none;
}
.audience li {
  display: flex;
  align-items: flex-start;
  gap: var(--space-4);
  padding: var(--space-5) 0;
  border-top: 1px solid var(--color-divider);
  font-size: var(--text-lg);
  color: var(--color-text);
  font-family: var(--font-display);
  font-weight: 400;
  line-height: 1.4;
}
.audience li:last-child { border-bottom: 1px solid var(--color-divider); }
.audience li::before {
  content: '';
  flex-shrink: 0;
  width: 10px; height: 10px;
  border-radius: 50%;
  background: var(--color-gold);
  margin-top: 0.5em;
  box-shadow: 0 0 0 4px var(--color-gold-soft);
}

/* ================================================================
   STATS / WHY
   ================================================================ */
.why-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-4);
}
@media (min-width: 720px) { .why-grid { grid-template-columns: 1fr 1fr; } }
@media (min-width: 1080px) { .why-grid { grid-template-columns: repeat(5, 1fr); } }

.stat {
  padding: var(--space-8) var(--space-6);
  border-top: 2px solid var(--color-gold);
  background: var(--color-surface);
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}
.stat__value {
  font-family: var(--font-display);
  font-size: var(--text-2xl);
  font-weight: 500;
  color: var(--color-primary);
  line-height: 1;
  letter-spacing: -0.02em;
}
[data-theme='dark'] .stat__value { color: var(--color-gold); }
.stat__label {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  line-height: 1.5;
}

/* ================================================================
   CTA BANNER
   ================================================================ */
.cta-banner {
  background:
    radial-gradient(800px 400px at 80% 50%, color-mix(in oklab, var(--color-gold) 22%, transparent), transparent 60%),
    var(--color-primary);
  color: var(--color-text-inverse);
  padding: clamp(var(--space-16), 8vw, var(--space-32)) clamp(var(--space-6), 4vw, var(--space-16));
  border-radius: var(--radius-xl);
  position: relative;
  overflow: hidden;
  isolation: isolate;
}
[data-theme='dark'] .cta-banner {
  background:
    radial-gradient(800px 400px at 80% 50%, color-mix(in oklab, var(--color-gold) 18%, transparent), transparent 60%),
    var(--color-surface-2);
  border: 1px solid var(--color-border);
}
.cta-banner::before {
  content: '';
  position: absolute; inset: 0;
  background-image: url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' width='200' height='200'><filter id='n'><feTurbulence type='fractalNoise' baseFrequency='0.85' numOctaves='2'/></filter><rect width='100%' height='100%' filter='url(%23n)' opacity='0.6'/></svg>");
  opacity: 0.06;
  z-index: -1;
}
.cta-banner__inner {
  max-width: 60ch;
  display: flex;
  flex-direction: column;
  gap: var(--space-6);
}
.cta-banner__title {
  font-size: var(--text-2xl);
  font-weight: 400;
  color: #fff;
  letter-spacing: -0.02em;
}
.cta-banner__title em { font-style: italic; color: var(--color-gold-3); }
.cta-banner__lede {
  font-family: var(--font-display);
  font-style: italic;
  font-size: var(--text-lg);
  color: rgba(255,255,255,0.78);
  font-weight: 400;
}
.cta-banner .btn--gold { align-self: flex-start; }

/* ================================================================
   PRODUCT PAGES
   ================================================================ */
.page-hero {
  padding-top: clamp(var(--space-16), 8vw, var(--space-24));
  padding-bottom: clamp(var(--space-12), 6vw, var(--space-20));
  border-bottom: 1px solid var(--color-divider);
  position: relative;
  overflow: hidden;
}
.page-hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background:
    radial-gradient(700px 400px at 90% 0%, color-mix(in oklab, var(--color-gold) 14%, transparent), transparent 60%);
  z-index: -1;
}
.page-hero__title {
  font-size: var(--text-3xl);
  font-weight: 400;
  letter-spacing: -0.02em;
  line-height: 1.05;
  margin-bottom: var(--space-6);
  max-width: 22ch;
}
.page-hero__title em { font-style: italic; color: var(--color-gold); }
.page-hero__sub {
  font-family: var(--font-display);
  font-size: var(--text-xl);
  font-style: italic;
  font-weight: 400;
  color: var(--color-text-muted);
  margin-bottom: var(--space-6);
  max-width: 40ch;
}
.page-hero__lede {
  max-width: 60ch;
  font-size: var(--text-base);
  color: var(--color-text-muted);
  line-height: 1.75;
}

.tag {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-2) var(--space-4);
  border: 1px solid var(--color-gold);
  border-radius: var(--radius-full);
  font-size: var(--text-xs);
  font-weight: 500;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--color-gold);
  background: var(--color-gold-soft);
  margin-bottom: var(--space-6);
}
[data-theme='dark'] .tag { background: var(--color-gold-soft); }

/* Two-column content */
.layout-2col {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(var(--space-10), 5vw, var(--space-16));
}
@media (min-width: 960px) {
  .layout-2col {
    grid-template-columns: 1fr 1.6fr;
    gap: clamp(var(--space-10), 6vw, var(--space-20));
  }
}
.layout-2col__heading {
  font-size: var(--text-xl);
  font-weight: 400;
  letter-spacing: -0.015em;
  position: sticky;
  top: 110px;
  align-self: start;
}
.layout-2col__heading em { font-style: italic; color: var(--color-gold); }

/* Numbered list (dimensions) */
.dim-list {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-2);
  list-style: none;
  counter-reset: dim;
}
.dim-list > li {
  counter-increment: dim;
  display: grid;
  grid-template-columns: auto 1fr;
  gap: var(--space-6);
  padding: var(--space-6) 0;
  border-bottom: 1px solid var(--color-divider);
  align-items: start;
}
.dim-list > li::before {
  content: counter(dim, decimal-leading-zero);
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  color: var(--color-gold);
  letter-spacing: 0.18em;
  padding-top: 0.5em;
  width: 2.5em;
}
.dim-list h3 {
  font-family: var(--font-display);
  font-size: var(--text-lg);
  font-weight: 500;
  color: var(--color-text);
  margin-bottom: var(--space-2);
}
.dim-list p {
  font-size: var(--text-base);
  color: var(--color-text-muted);
  line-height: 1.65;
  max-width: 64ch;
}

/* Bullet block */
.bullets {
  display: grid;
  gap: var(--space-3);
  list-style: none;
  margin-top: var(--space-4);
}
.bullets li {
  display: flex;
  gap: var(--space-3);
  align-items: baseline;
  font-size: var(--text-base);
  color: var(--color-text);
  line-height: 1.55;
}
.bullets li::before {
  content: '';
  flex-shrink: 0;
  width: 6px; height: 6px;
  border-radius: 50%;
  background: var(--color-gold);
  transform: translateY(-3px);
}

/* Output block */
.output-card {
  background: var(--color-surface);
  border: 1px solid var(--color-divider);
  border-left: 3px solid var(--color-gold);
  padding: clamp(var(--space-6), 3vw, var(--space-10));
  border-radius: var(--radius-md);
  margin-top: var(--space-8);
}
.output-card h4 {
  font-family: var(--font-display);
  font-size: var(--text-lg);
  font-weight: 500;
  margin-bottom: var(--space-4);
  color: var(--color-text);
}

/* Use cases */
.usecase-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-4);
}
@media (min-width: 720px) { .usecase-grid { grid-template-columns: 1fr 1fr; } }
@media (min-width: 1080px) { .usecase-grid { grid-template-columns: repeat(3, 1fr); } }
.usecase {
  padding: var(--space-6);
  border: 1px solid var(--color-divider);
  border-radius: var(--radius-md);
  background: var(--color-surface);
  font-size: var(--text-sm);
  color: var(--color-text);
  line-height: 1.55;
  font-weight: 500;
  position: relative;
  padding-left: var(--space-10);
}
.usecase::before {
  content: '';
  position: absolute;
  left: var(--space-6); top: var(--space-7);
  width: 8px; height: 8px;
  background: var(--color-gold);
  transform: rotate(45deg);
}

/* ================================================================
   FOOTER
   ================================================================ */
.footer {
  background: var(--color-surface-2);
  border-top: 1px solid var(--color-divider);
  padding: var(--space-16) 0 var(--space-8);
  margin-top: var(--space-24);
}
.footer__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-10);
  margin-bottom: var(--space-12);
}
@media (min-width: 720px) {
  .footer__grid {
    grid-template-columns: 1.6fr 1fr 1fr 1fr;
  }
}
.footer__title {
  font-family: var(--font-body);
  font-size: var(--text-xs);
  font-weight: 600;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--color-text-faint);
  margin-bottom: var(--space-4);
}
.footer__list { list-style: none; display: flex; flex-direction: column; gap: var(--space-2); }
.footer__list a {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
}
.footer__list a:hover { color: var(--color-gold); }
.footer__bottom {
  border-top: 1px solid var(--color-divider);
  padding-top: var(--space-6);
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: var(--space-4);
  font-size: var(--text-xs);
  color: var(--color-text-faint);
}
.footer__brand-text {
  font-family: var(--font-display);
  font-size: var(--text-base);
  font-style: italic;
  color: var(--color-text-muted);
  max-width: 40ch;
  margin-top: var(--space-3);
}

/* ================================================================
   CONTACT FORM
   ================================================================ */
.contact-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-12);
}
@media (min-width: 960px) {
  .contact-grid { grid-template-columns: 1fr 1.2fr; }
}

.form {
  background: var(--color-surface);
  padding: clamp(var(--space-6), 3vw, var(--space-10));
  border: 1px solid var(--color-divider);
  border-radius: var(--radius-lg);
  display: flex;
  flex-direction: column;
  gap: var(--space-5);
}
.field { display: flex; flex-direction: column; gap: var(--space-2); }
.field label {
  font-size: var(--text-xs);
  letter-spacing: 0.12em;
  text-transform: uppercase;
  font-weight: 600;
  color: var(--color-text-muted);
}
.field input,
.field textarea,
.field select {
  width: 100%;
  padding: var(--space-3) var(--space-4);
  background: var(--color-bg);
  border: 1px solid var(--color-divider);
  border-radius: var(--radius-sm);
  font-size: var(--text-base);
  color: var(--color-text);
}
.field input:focus,
.field textarea:focus,
.field select:focus {
  outline: none;
  border-color: var(--color-gold);
  box-shadow: 0 0 0 3px var(--color-gold-soft);
}
.field textarea { resize: vertical; min-height: 140px; }
.field-row { display: grid; grid-template-columns: 1fr 1fr; gap: var(--space-4); }
@media (max-width: 600px) { .field-row { grid-template-columns: 1fr; } }

/* ================================================================
   REVEAL ANIMATIONS
   ================================================================ */
.reveal {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.8s cubic-bezier(0.16, 1, 0.3, 1),
              transform 0.8s cubic-bezier(0.16, 1, 0.3, 1);
}
.reveal.is-visible { opacity: 1; transform: none; }

/* ================================================================
   UTILS
   ================================================================ */
.text-gold { color: var(--color-gold); }
.text-muted { color: var(--color-text-muted); }
.text-italic { font-style: italic; }
.divider {
  border: none; height: 1px; background: var(--color-divider);
  margin: var(--space-12) 0;
}
.rule-gold {
  width: 64px; height: 2px; background: var(--color-gold);
  border: none; margin-bottom: var(--space-6);
}

/* ================================================================
   ADVANCED CONTACT FORM
   ================================================================ */

.contact-shell {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(var(--space-10), 5vw, var(--space-16));
}
@media (min-width: 1024px) {
  .contact-shell {
    grid-template-columns: 360px 1fr;
    gap: clamp(var(--space-12), 5vw, var(--space-20));
  }
}

/* Sidebar */
.contact-side {
  display: flex;
  flex-direction: column;
  gap: var(--space-8);
}
@media (min-width: 1024px) {
  .contact-side { position: sticky; top: 110px; align-self: start; }
}
.contact-side__title {
  font-family: var(--font-display);
  font-size: var(--text-xl);
  font-weight: 400;
  letter-spacing: -0.015em;
  margin-bottom: var(--space-3);
}
.contact-side__title em { font-style: italic; color: var(--color-gold); }

.side-block {
  border-top: 1px solid var(--color-divider);
  padding-top: var(--space-5);
}
.side-block__label {
  font-size: var(--text-xs);
  letter-spacing: 0.16em;
  text-transform: uppercase;
  font-weight: 600;
  color: var(--color-text-faint);
  margin-bottom: var(--space-3);
  display: flex;
  align-items: center;
  gap: var(--space-2);
}
.side-block__label svg {
  width: 14px; height: 14px;
  color: var(--color-gold);
}
.side-block__value {
  font-size: var(--text-base);
  color: var(--color-text);
  line-height: 1.55;
}
.side-block__value a { border-bottom: 1px solid var(--color-gold); }
.side-block__value a:hover { color: var(--color-gold); }
.side-block__note {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  line-height: 1.6;
  margin-top: var(--space-1);
}

.assurance {
  display: flex;
  align-items: flex-start;
  gap: var(--space-3);
  padding: var(--space-4);
  background: var(--color-gold-soft);
  border: 1px solid color-mix(in oklab, var(--color-gold) 35%, transparent);
  border-radius: var(--radius-md);
  font-size: var(--text-sm);
  color: var(--color-gold-ink);
  line-height: 1.5;
}
[data-theme='dark'] .assurance {
  color: var(--color-gold-3);
  background: color-mix(in oklab, var(--color-gold) 10%, transparent);
}
.assurance svg {
  width: 18px; height: 18px;
  flex-shrink: 0;
  color: var(--color-gold);
  margin-top: 2px;
}
.assurance strong { font-weight: 600; }

/* Form shell */
.briefing {
  background: var(--color-surface);
  border: 1px solid var(--color-divider);
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  position: relative;
}

/* Form header strip */
.briefing__head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-4);
  padding: var(--space-5) clamp(var(--space-6), 3vw, var(--space-8));
  background: linear-gradient(180deg, var(--color-surface-2), var(--color-surface));
  border-bottom: 1px solid var(--color-divider);
  flex-wrap: wrap;
}
.briefing__title {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  font-family: var(--font-display);
  font-size: var(--text-lg);
  font-weight: 500;
  color: var(--color-text);
  letter-spacing: -0.01em;
}
.briefing__title svg { width: 20px; height: 20px; color: var(--color-gold); }

.briefing__autosave {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  font-size: var(--text-xs);
  color: var(--color-text-faint);
  letter-spacing: 0.06em;
  text-transform: uppercase;
  font-weight: 500;
}
.briefing__autosave .dot {
  width: 6px; height: 6px;
  border-radius: 50%;
  background: var(--color-success);
  box-shadow: 0 0 0 3px color-mix(in oklab, var(--color-success) 25%, transparent);
}

/* Stepper */
.stepper {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--space-2);
  padding: var(--space-5) clamp(var(--space-6), 3vw, var(--space-8));
  border-bottom: 1px solid var(--color-divider);
  background: var(--color-surface);
}
.stepper__item {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
  padding: var(--space-2) 0;
  border-top: 2px solid var(--color-divider);
  transition: border-color var(--transition-interactive),
              color var(--transition-interactive);
}
.stepper__item.is-active { border-top-color: var(--color-gold); }
.stepper__item.is-done { border-top-color: var(--color-primary); }
[data-theme='dark'] .stepper__item.is-done { border-top-color: var(--color-gold); }
.stepper__num {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.18em;
  color: var(--color-text-faint);
  display: flex;
  align-items: center;
  gap: var(--space-2);
}
.stepper__item.is-active .stepper__num { color: var(--color-gold); }
.stepper__item.is-done .stepper__num { color: var(--color-primary); }
[data-theme='dark'] .stepper__item.is-done .stepper__num { color: var(--color-gold); }
.stepper__num .check {
  width: 12px; height: 12px;
  display: none;
}
.stepper__item.is-done .check { display: inline-block; }
.stepper__label {
  font-size: var(--text-sm);
  font-weight: 500;
  color: var(--color-text-muted);
  line-height: 1.3;
}
.stepper__item.is-active .stepper__label { color: var(--color-text); }
.stepper__item.is-done .stepper__label { color: var(--color-text); }

@media (max-width: 640px) {
  .stepper { grid-template-columns: repeat(4, 1fr); padding: var(--space-4); gap: var(--space-1); }
  .stepper__label { display: none; }
  .stepper__num { font-size: 0.65rem; }
}

/* Step body */
.step {
  display: none;
  padding: clamp(var(--space-8), 4vw, var(--space-12));
  flex-direction: column;
  gap: var(--space-6);
  animation: stepFade 0.5s cubic-bezier(0.16, 1, 0.3, 1);
}
.step.is-active { display: flex; }
@keyframes stepFade {
  from { opacity: 0; transform: translateY(8px); }
  to { opacity: 1; transform: none; }
}

.step__intro {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
  margin-bottom: var(--space-2);
  padding-bottom: var(--space-5);
  border-bottom: 1px solid var(--color-divider);
}
.step__eyebrow {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--color-gold);
}
.step__title {
  font-family: var(--font-display);
  font-size: var(--text-xl);
  font-weight: 500;
  color: var(--color-text);
  letter-spacing: -0.015em;
  line-height: 1.2;
}
.step__title em { font-style: italic; color: var(--color-gold); }
.step__lede {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  line-height: 1.65;
  max-width: 60ch;
}

/* Fields refined */
.briefing .field { gap: var(--space-2); }
.briefing .field label {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: var(--space-3);
  font-size: var(--text-xs);
  letter-spacing: 0.14em;
  text-transform: uppercase;
  font-weight: 600;
  color: var(--color-text-muted);
}
.briefing .field label .req {
  color: var(--color-gold);
  text-transform: none;
  letter-spacing: 0;
  font-size: 0.95em;
  font-weight: 500;
}
.briefing .field label .opt {
  color: var(--color-text-faint);
  text-transform: none;
  letter-spacing: 0;
  font-style: italic;
  font-size: 0.95em;
  font-weight: 400;
}
.briefing .field-help {
  font-size: var(--text-xs);
  color: var(--color-text-faint);
  line-height: 1.5;
  margin-top: var(--space-1);
}
.briefing .field input,
.briefing .field textarea,
.briefing .field select {
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  padding: var(--space-3) var(--space-4);
  font-size: var(--text-base);
  color: var(--color-text);
  transition: border-color var(--transition-interactive),
              box-shadow var(--transition-interactive),
              background var(--transition-interactive);
}
.briefing .field textarea { min-height: 130px; line-height: 1.6; }
.briefing .field input:hover,
.briefing .field textarea:hover,
.briefing .field select:hover { border-color: var(--color-text-faint); }

.briefing .field.has-error input,
.briefing .field.has-error textarea,
.briefing .field.has-error select {
  border-color: var(--color-error);
  box-shadow: 0 0 0 3px color-mix(in oklab, var(--color-error) 18%, transparent);
}
.briefing .field-error {
  font-size: var(--text-xs);
  color: var(--color-error);
  display: none;
  align-items: center;
  gap: var(--space-2);
  margin-top: var(--space-1);
}
.briefing .field.has-error .field-error { display: flex; }

/* Counter */
.field-counter {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  color: var(--color-text-faint);
  letter-spacing: 0.04em;
}
.field-counter.is-warn { color: var(--color-warning); }

/* Card chooser (radio cards) */
.choices {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-3);
}
@media (min-width: 640px) { .choices { grid-template-columns: 1fr 1fr; } }
.choice {
  position: relative;
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
  padding: var(--space-5);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  background: var(--color-bg);
  cursor: pointer;
  transition: border-color var(--transition-interactive),
              background var(--transition-interactive),
              transform var(--transition-interactive);
}
.choice:hover {
  border-color: var(--color-gold);
  transform: translateY(-1px);
}
.choice input { position: absolute; opacity: 0; pointer-events: none; }
.choice__check {
  position: absolute;
  top: var(--space-4); right: var(--space-4);
  width: 20px; height: 20px;
  border: 1.5px solid var(--color-border);
  border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  background: var(--color-surface);
  transition: all var(--transition-interactive);
}
.choice__check::after {
  content: '';
  width: 9px; height: 9px;
  border-radius: 50%;
  background: var(--color-gold);
  transform: scale(0);
  transition: transform var(--transition-interactive);
}
.choice input:checked ~ .choice__check {
  border-color: var(--color-gold);
}
.choice input:checked ~ .choice__check::after { transform: scale(1); }
.choice input:checked ~ .choice__title { color: var(--color-text); }
.choice:has(input:checked) {
  border-color: var(--color-gold);
  background: var(--color-gold-soft);
  box-shadow: 0 0 0 1px var(--color-gold);
}
[data-theme='dark'] .choice:has(input:checked) {
  background: color-mix(in oklab, var(--color-gold) 8%, transparent);
}
.choice__title {
  font-family: var(--font-display);
  font-size: var(--text-base);
  font-weight: 500;
  color: var(--color-text);
  padding-right: var(--space-8);
  line-height: 1.25;
}
.choice__desc {
  font-size: var(--text-xs);
  color: var(--color-text-muted);
  line-height: 1.55;
  letter-spacing: 0;
  text-transform: none;
  font-weight: 400;
}

/* Chips (multi-select) */
.chips {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
}
.chip {
  position: relative;
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-2) var(--space-4);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-full);
  background: var(--color-bg);
  font-size: var(--text-sm);
  font-weight: 500;
  color: var(--color-text-muted);
  cursor: pointer;
  transition: all var(--transition-interactive);
}
.chip input { position: absolute; opacity: 0; pointer-events: none; }
.chip:hover { border-color: var(--color-gold); color: var(--color-text); }
.chip:has(input:checked) {
  background: var(--color-primary);
  border-color: var(--color-primary);
  color: var(--color-text-inverse);
}
[data-theme='dark'] .chip:has(input:checked) {
  background: var(--color-gold);
  border-color: var(--color-gold);
  color: var(--color-primary-ink);
}
.chip:has(input:checked)::before {
  content: '✓';
  font-weight: 600;
}

/* Slider */
.slider-block {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}
.slider-row {
  display: flex;
  align-items: center;
  gap: var(--space-4);
}
.slider-row input[type="range"] {
  flex: 1;
  accent-color: var(--color-gold);
}
.slider-value {
  font-family: var(--font-display);
  font-size: var(--text-xl);
  font-weight: 500;
  color: var(--color-text);
  min-width: 4ch;
  text-align: right;
}
.slider-marks {
  display: flex;
  justify-content: space-between;
  font-size: var(--text-xs);
  color: var(--color-text-faint);
  font-family: var(--font-mono);
  letter-spacing: 0.06em;
}

/* Checkbox row */
.check-row {
  display: flex;
  align-items: flex-start;
  gap: var(--space-3);
  padding: var(--space-4);
  border: 1px solid var(--color-divider);
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: border-color var(--transition-interactive);
  background: var(--color-bg);
}
.check-row:hover { border-color: var(--color-gold); }
.check-row input { position: absolute; opacity: 0; pointer-events: none; }
.check-row__box {
  flex-shrink: 0;
  width: 20px; height: 20px;
  border: 1.5px solid var(--color-border);
  border-radius: 4px;
  display: flex; align-items: center; justify-content: center;
  background: var(--color-surface);
  transition: all var(--transition-interactive);
  margin-top: 2px;
}
.check-row__box svg {
  width: 12px; height: 12px;
  color: var(--color-text-inverse);
  opacity: 0;
  transform: scale(0.5);
  transition: all var(--transition-interactive);
}
.check-row input:checked ~ .check-row__box {
  background: var(--color-primary);
  border-color: var(--color-primary);
}
[data-theme='dark'] .check-row input:checked ~ .check-row__box {
  background: var(--color-gold);
  border-color: var(--color-gold);
}
.check-row input:checked ~ .check-row__box svg {
  opacity: 1; transform: scale(1);
}
[data-theme='dark'] .check-row input:checked ~ .check-row__box svg { color: var(--color-primary-ink); }
.check-row__text {
  font-size: var(--text-sm);
  color: var(--color-text);
  line-height: 1.55;
}
.check-row__text strong { font-weight: 600; }
.check-row__text a { border-bottom: 1px solid var(--color-gold); color: var(--color-text); }
.check-row__text a:hover { color: var(--color-gold); }

/* Review summary list */
.summary {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-1);
  background: var(--color-bg);
  border: 1px solid var(--color-divider);
  border-radius: var(--radius-md);
  padding: var(--space-2);
}
.summary__row {
  display: grid;
  grid-template-columns: 200px 1fr auto;
  gap: var(--space-4);
  padding: var(--space-3) var(--space-4);
  align-items: baseline;
  border-radius: var(--radius-sm);
}
.summary__label { word-break: break-word; }
.summary__row + .summary__row { border-top: 1px solid var(--color-divider); }
.summary__label {
  font-size: var(--text-xs);
  letter-spacing: 0.12em;
  text-transform: uppercase;
  font-weight: 600;
  color: var(--color-text-faint);
}
.summary__value {
  font-size: var(--text-sm);
  color: var(--color-text);
  line-height: 1.55;
  word-break: break-word;
}
.summary__value.is-empty { color: var(--color-text-faint); font-style: italic; }
.summary__edit {
  font-size: var(--text-xs);
  color: var(--color-gold);
  border-bottom: 1px solid transparent;
  font-weight: 500;
  letter-spacing: 0.04em;
}
.summary__edit:hover { border-bottom-color: var(--color-gold); }
@media (max-width: 640px) {
  .summary__row { grid-template-columns: 1fr; gap: var(--space-1); }
  .summary__edit { justify-self: start; }
}

/* Step nav */
.step-nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-4);
  padding: var(--space-5) clamp(var(--space-6), 3vw, var(--space-8));
  border-top: 1px solid var(--color-divider);
  background: var(--color-surface-2);
  flex-wrap: wrap;
}
.step-nav__progress {
  font-size: var(--text-xs);
  color: var(--color-text-muted);
  letter-spacing: 0.06em;
}
.step-nav__progress strong { color: var(--color-text); font-weight: 600; }
.step-nav__buttons {
  display: flex;
  gap: var(--space-3);
  align-items: center;
}

/* Success screen */
.briefing__success {
  display: none;
  padding: clamp(var(--space-12), 6vw, var(--space-20));
  text-align: center;
  flex-direction: column;
  align-items: center;
  gap: var(--space-5);
  animation: stepFade 0.6s cubic-bezier(0.16, 1, 0.3, 1);
}
.briefing.is-submitted .briefing__head,
.briefing.is-submitted .stepper,
.briefing.is-submitted .step,
.briefing.is-submitted .step-nav { display: none; }
.briefing.is-submitted .briefing__success { display: flex; }

.success-mark {
  width: 72px; height: 72px;
  border-radius: 50%;
  background: var(--color-gold-soft);
  border: 1px solid var(--color-gold);
  display: flex; align-items: center; justify-content: center;
  color: var(--color-gold);
}
[data-theme='dark'] .success-mark {
  background: color-mix(in oklab, var(--color-gold) 12%, transparent);
}
.success-mark svg { width: 32px; height: 32px; }
.briefing__success h3 {
  font-family: var(--font-display);
  font-size: var(--text-2xl);
  font-weight: 400;
  color: var(--color-text);
  letter-spacing: -0.02em;
}
.briefing__success h3 em { font-style: italic; color: var(--color-gold); }
.briefing__success p {
  max-width: 52ch;
  font-size: var(--text-base);
  color: var(--color-text-muted);
  line-height: 1.65;
}
.success-ref {
  display: inline-flex;
  align-items: center;
  gap: var(--space-3);
  margin-top: var(--space-4);
  padding: var(--space-3) var(--space-5);
  background: var(--color-bg);
  border: 1px solid var(--color-divider);
  border-radius: var(--radius-full);
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  color: var(--color-text-muted);
  letter-spacing: 0.08em;
}
.success-ref strong { color: var(--color-text); font-weight: 600; }