/* ═══════════════════════════════════════════════════════════════
   CULVERT EQUITY PARTNERS — DESIGN SYSTEM
   Palette: deep charcoal base · warm gold accent · stone text
════════════════════════════════════════════════════════════════ */

:root,
[data-theme='dark'] {
  /* ── Type scale ───────────────────────────────────────────── */
  --text-xs:   clamp(0.75rem,  0.7rem  + 0.25vw, 0.875rem);
  --text-sm:   clamp(0.875rem, 0.8rem  + 0.35vw, 1rem);
  --text-base: clamp(1rem,     0.95rem + 0.25vw, 1.125rem);
  --text-lg:   clamp(1.125rem, 1rem    + 0.75vw, 1.5rem);
  --text-xl:   clamp(1.5rem,   1.2rem  + 1.25vw, 2.25rem);
  --text-2xl:  clamp(2rem,     1.2rem  + 2.5vw,  3.5rem);
  --text-3xl:  clamp(2.5rem,   1rem    + 4vw,    5rem);
  --text-hero: clamp(3rem,     0.5rem  + 7vw,    7rem);

  /* ── Spacing ─────────────────────────────────────────────── */
  --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;

  /* ── Dark palette ────────────────────────────────────────── */
  --color-bg:              #0e0d0b;
  --color-surface:         #141310;
  --color-surface-2:       #1a1916;
  --color-surface-offset:  #1f1e1b;
  --color-border:          #2e2c28;
  --color-divider:         #252420;
  --color-text:            #ddd9d0;
  --color-text-muted:      #8c8880;
  --color-text-faint:      #4e4c48;
  --color-text-inverse:    #0e0d0b;

  /* Gold accent */
  --color-primary:         #c9a04a;
  --color-primary-hover:   #dbb85c;
  --color-primary-active:  #a8822e;
  --color-primary-bg:      rgba(201,160,74,0.08);

  --color-success:         #5a8a3f;

  /* ── Tokens ──────────────────────────────────────────────── */
  --radius-sm: 0.25rem;
  --radius-md: 0.375rem;
  --radius-lg: 0.625rem;
  --radius-xl: 1rem;

  --transition: 180ms cubic-bezier(0.16, 1, 0.3, 1);

  --shadow-sm: 0 1px 3px rgba(0,0,0,0.4);
  --shadow-md: 0 4px 16px rgba(0,0,0,0.5);
  --shadow-lg: 0 16px 48px rgba(0,0,0,0.6);

  --content-narrow:  640px;
  --content-default: 1000px;
  --content-wide:    1200px;

  --font-display: 'Playfair Display', Georgia, 'Times New Roman', serif;
  --font-body:    'DM Sans', 'Helvetica Neue', Arial, sans-serif;
}

/* Light mode (optional) */
[data-theme='light'] {
  --color-bg:              #f6f4ef;
  --color-surface:         #f9f8f4;
  --color-surface-2:       #ffffff;
  --color-surface-offset:  #eeebe3;
  --color-border:          #d8d4c8;
  --color-divider:         #e2dfd8;
  --color-text:            #1c1a16;
  --color-text-muted:      #6b6760;
  --color-text-faint:      #b0ada5;
  --color-text-inverse:    #f9f8f4;
  --color-primary:         #9e7a28;
  --color-primary-hover:   #8a6820;
  --color-primary-active:  #73571a;
  --color-primary-bg:      rgba(158,122,40,0.07);
  --shadow-sm: 0 1px 3px rgba(0,0,0,0.07);
  --shadow-md: 0 4px 16px rgba(0,0,0,0.09);
  --shadow-lg: 0 16px 48px rgba(0,0,0,0.12);
}

@media (prefers-color-scheme: light) {
  :root:not([data-theme='dark']) {
    --color-bg:              #f6f4ef;
    --color-surface:         #f9f8f4;
    --color-surface-2:       #ffffff;
    --color-surface-offset:  #eeebe3;
    --color-border:          #d8d4c8;
    --color-divider:         #e2dfd8;
    --color-text:            #1c1a16;
    --color-text-muted:      #6b6760;
    --color-text-faint:      #b0ada5;
    --color-text-inverse:    #f9f8f4;
    --color-primary:         #9e7a28;
    --color-primary-hover:   #8a6820;
    --color-primary-active:  #73571a;
    --color-primary-bg:      rgba(158,122,40,0.07);
    --shadow-sm: 0 1px 3px rgba(0,0,0,0.07);
    --shadow-md: 0 4px 16px rgba(0,0,0,0.09);
    --shadow-lg: 0 16px 48px rgba(0,0,0,0.12);
  }
}

/* ═══════════════════════════════════════════════
   BASE RESET
════════════════════════════════════════════════ */
*, *::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: 5rem;
}
body {
  min-height: 100dvh;
  font-family: var(--font-body);
  font-size: var(--text-base);
  color: var(--color-text);
  background-color: var(--color-bg);
  line-height: 1.65;
}
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; }
h1, h2, h3, h4 { text-wrap: balance; line-height: 1.15; font-family: var(--font-display); }
p, li { text-wrap: pretty; }
a { color: inherit; text-decoration: none; }
button { cursor: pointer; background: none; border: none; }

::selection {
  background: rgba(201,160,74,0.2);
  color: var(--color-text);
}
:focus-visible {
  outline: 2px solid var(--color-primary);
  outline-offset: 3px;
  border-radius: var(--radius-sm);
}
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
}

/* ═══════════════════════════════════════════════
   LAYOUT UTILITIES
════════════════════════════════════════════════ */
.container {
  width: min(var(--content-wide), 100%);
  margin-inline: auto;
  padding-inline: clamp(var(--space-6), 5vw, var(--space-16));
}
.section {
  padding-block: clamp(var(--space-16), 10vw, var(--space-32));
}
.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;
}

/* ═══════════════════════════════════════════════
   BUTTONS
════════════════════════════════════════════════ */
.btn {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  padding: 0.75rem 1.75rem;
  font-family: var(--font-body);
  font-size: var(--text-sm);
  font-weight: 500;
  letter-spacing: 0.04em;
  border-radius: var(--radius-md);
  transition: all var(--transition);
  text-decoration: none;
  white-space: nowrap;
  cursor: pointer;
  border: 1.5px solid transparent;
}
.btn-primary {
  background: var(--color-primary);
  color: #0e0d0b;
  border-color: var(--color-primary);
}
.btn-primary:hover {
  background: var(--color-primary-hover);
  border-color: var(--color-primary-hover);
  transform: translateY(-1px);
  box-shadow: 0 6px 20px rgba(201,160,74,0.25);
}
.btn-primary:active { transform: translateY(0); }
.btn-ghost {
  background: transparent;
  color: var(--color-text-muted);
  border-color: var(--color-border);
}
.btn-ghost:hover {
  color: var(--color-text);
  border-color: var(--color-text-muted);
  background: var(--color-surface-offset);
}

/* ═══════════════════════════════════════════════
   SECTION TYPOGRAPHY
════════════════════════════════════════════════ */
.section-eyebrow {
  font-family: var(--font-body);
  font-size: var(--text-xs);
  font-weight: 500;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--color-primary);
  margin-bottom: var(--space-4);
}
.section-eyebrow.light { color: var(--color-primary); }
.section-heading {
  font-family: var(--font-display);
  font-size: var(--text-2xl);
  font-weight: 500;
  color: var(--color-text);
  line-height: 1.1;
}
.section-heading em {
  font-style: italic;
  color: var(--color-primary);
}
.section-header {
  max-width: 560px;
  margin-bottom: clamp(var(--space-12), 6vw, var(--space-20));
}

/* ═══════════════════════════════════════════════
   HEADER / NAV
════════════════════════════════════════════════ */
.header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: color-mix(in srgb, var(--color-bg) 85%, transparent);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--color-border);
  transition: box-shadow var(--transition);
}
.header--scrolled { box-shadow: var(--shadow-md); }
.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 64px;
}
.logo-link {
  display: flex;
  align-items: center;
  transition: opacity var(--transition);
}
.logo-link:hover { opacity: 0.8; }
.logo-svg { width: auto; height: 28px; min-width: 220px; color: var(--color-text); overflow: visible; }
.logo-accent { color: var(--color-primary); }
.logo-subtle { color: var(--color-text-faint); }
.logo-sub { opacity: 0.5; }

.nav-list {
  display: flex;
  align-items: center;
  gap: var(--space-8);
  list-style: none;
}
.nav-link {
  font-size: var(--text-sm);
  font-weight: 400;
  color: var(--color-text-muted);
  letter-spacing: 0.02em;
  transition: color var(--transition);
  position: relative;
}
.nav-link::after {
  content: '';
  position: absolute;
  bottom: -3px; left: 0; right: 0;
  height: 1px;
  background: var(--color-primary);
  transform: scaleX(0);
  transition: transform var(--transition);
  transform-origin: left;
}
.nav-link:hover { color: var(--color-text); }
.nav-link:hover::after { transform: scaleX(1); }
.nav-cta {
  padding: 0.5rem 1.2rem;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  color: var(--color-text);
  transition: all var(--transition);
}
.nav-cta::after { display: none; }
.nav-cta:hover {
  border-color: var(--color-primary);
  color: var(--color-primary);
  background: var(--color-primary-bg);
}

/* mobile toggle */
.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  padding: var(--space-2);
}
.nav-toggle span {
  display: block;
  width: 22px;
  height: 1.5px;
  background: var(--color-text);
  transition: transform var(--transition), opacity var(--transition);
  border-radius: 1px;
}
.nav-toggle.open span:nth-child(1) { transform: translateY(6.5px) rotate(45deg); }
.nav-toggle.open span:nth-child(2) { opacity: 0; }
.nav-toggle.open span:nth-child(3) { transform: translateY(-6.5px) rotate(-45deg); }

.mobile-nav {
  display: none;
  position: fixed;
  inset: 0;
  top: 64px;
  background: var(--color-bg);
  z-index: 99;
  padding: var(--space-8) var(--space-6);
  transform: translateX(100%);
  transition: transform 0.3s cubic-bezier(0.16, 1, 0.3, 1);
}
.mobile-nav.open { transform: translateX(0); }
.mobile-nav-list { display: flex; flex-direction: column; gap: var(--space-2); }
.mobile-nav-link {
  display: block;
  padding: var(--space-4) 0;
  font-size: var(--text-lg);
  font-family: var(--font-display);
  color: var(--color-text);
  border-bottom: 1px solid var(--color-divider);
  transition: color var(--transition);
}
.mobile-nav-link:hover { color: var(--color-primary); }

/* ═══════════════════════════════════════════════
   HERO
════════════════════════════════════════════════ */
.hero {
  position: relative;
  min-height: 92vh;
  display: flex;
  align-items: center;
  overflow: hidden;
}
.hero-bg {
  position: absolute;
  inset: 0;
  pointer-events: none;
}
.hero-grid {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(var(--color-border) 1px, transparent 1px),
    linear-gradient(90deg, var(--color-border) 1px, transparent 1px);
  background-size: 60px 60px;
  opacity: 0.18;
  mask-image: radial-gradient(ellipse 80% 80% at 50% 50%, black 20%, transparent 80%);
}
.hero-glow {
  position: absolute;
  top: 20%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 600px;
  height: 400px;
  background: radial-gradient(ellipse, rgba(201,160,74,0.06) 0%, transparent 65%);
  border-radius: 50%;
}
.hero-content {
  position: relative;
  z-index: 1;
  max-width: 820px;
  padding-block: clamp(var(--space-16), 10vw, var(--space-32));
}
.hero-eyebrow {
  font-family: var(--font-body);
  font-size: var(--text-xs);
  font-weight: 500;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--color-primary);
  margin-bottom: var(--space-6);
  display: flex;
  align-items: center;
  gap: var(--space-3);
}
.hero-eyebrow::before {
  content: '';
  display: block;
  width: 32px;
  height: 1px;
  background: var(--color-primary);
  opacity: 0.6;
}
.hero-heading {
  font-family: var(--font-display);
  font-size: var(--text-hero);
  font-weight: 400;
  line-height: 1.05;
  color: var(--color-text);
  margin-bottom: var(--space-8);
}
.hero-heading em {
  font-style: italic;
  color: var(--color-primary);
}
.hero-sub {
  font-size: var(--text-base);
  color: var(--color-text-muted);
  max-width: 56ch;
  line-height: 1.7;
  margin-bottom: var(--space-10);
}
.hero-actions {
  display: flex;
  gap: var(--space-4);
  flex-wrap: wrap;
}
.hero-scroll-hint {
  position: absolute;
  bottom: var(--space-8);
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-2);
  color: var(--color-text-faint);
  font-size: var(--text-xs);
  letter-spacing: 0.1em;
  text-transform: uppercase;
  animation: scrollBob 2s ease-in-out infinite;
}
@keyframes scrollBob {
  0%, 100% { transform: translateX(-50%) translateY(0); }
  50% { transform: translateX(-50%) translateY(6px); }
}

/* ═══════════════════════════════════════════════
   STAT BAR
════════════════════════════════════════════════ */
.stat-bar {
  background: var(--color-surface);
  border-top: 1px solid var(--color-border);
  border-bottom: 1px solid var(--color-border);
  padding-block: clamp(var(--space-8), 4vw, var(--space-12));
}
.stat-bar-inner {
  display: flex;
  align-items: center;
  justify-content: space-around;
  flex-wrap: wrap;
  gap: var(--space-8);
}
.stat-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-2);
  text-align: center;
}
.stat-num {
  font-family: var(--font-display);
  font-size: var(--text-2xl);
  font-weight: 500;
  color: var(--color-text);
  line-height: 1;
}
.stat-unit {
  color: var(--color-primary);
  font-style: italic;
}
.stat-label {
  font-size: var(--text-xs);
  color: var(--color-text-muted);
  letter-spacing: 0.08em;
  text-transform: uppercase;
}
.stat-divider {
  width: 1px;
  height: 40px;
  background: var(--color-border);
}

/* ═══════════════════════════════════════════════
   APPROACH
════════════════════════════════════════════════ */
.approach { background: var(--color-bg); }
.approach-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: var(--space-6);
}
.approach-card {
  padding: var(--space-8) var(--space-6);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  transition: border-color var(--transition), transform var(--transition), box-shadow var(--transition);
  position: relative;
  overflow: hidden;
}
.approach-card::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 2px;
  background: linear-gradient(90deg, transparent, var(--color-primary), transparent);
  opacity: 0;
  transition: opacity var(--transition);
}
.approach-card:hover {
  border-color: var(--color-primary);
  transform: translateY(-3px);
  box-shadow: var(--shadow-md);
}
.approach-card:hover::before { opacity: 1; }
.approach-num {
  font-family: var(--font-display);
  font-size: var(--text-3xl);
  font-weight: 700;
  color: var(--color-text-faint);
  line-height: 1;
  margin-bottom: var(--space-6);
  letter-spacing: -0.02em;
}
.approach-title {
  font-family: var(--font-display);
  font-size: var(--text-lg);
  font-weight: 500;
  color: var(--color-text);
  margin-bottom: var(--space-3);
}
.approach-body {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  line-height: 1.7;
}

/* ═══════════════════════════════════════════════
   THESIS SECTION
════════════════════════════════════════════════ */
.thesis-section {
  position: relative;
  background: var(--color-surface);
  padding-block: clamp(var(--space-20), 12vw, var(--space-32));
  overflow: hidden;
  border-top: 1px solid var(--color-border);
  border-bottom: 1px solid var(--color-border);
}
.thesis-bg {
  position: absolute;
  inset: 0;
  pointer-events: none;
}
.thesis-lines {
  position: absolute;
  inset: 0;
  background: repeating-linear-gradient(
    -45deg,
    transparent 0,
    transparent 40px,
    var(--color-border) 40px,
    var(--color-border) 41px
  );
  opacity: 0.12;
}
.thesis-content {
  position: relative;
  z-index: 1;
  max-width: 900px;
}
.thesis-heading {
  font-family: var(--font-display);
  font-size: var(--text-2xl);
  font-weight: 400;
  font-style: italic;
  line-height: 1.25;
  color: var(--color-text);
  margin-bottom: var(--space-8);
  margin-top: var(--space-5);
}
.thesis-body {
  font-size: var(--text-base);
  color: var(--color-text-muted);
  line-height: 1.75;
  max-width: 66ch;
  margin-bottom: var(--space-12);
}
.thesis-pillars {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-8);
}
.thesis-pillar {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  font-size: var(--text-sm);
  font-weight: 500;
  color: var(--color-text-muted);
}
.thesis-pillar svg { color: var(--color-primary); flex-shrink: 0; }

/* ═══════════════════════════════════════════════
   CRITERIA
════════════════════════════════════════════════ */
.criteria { background: var(--color-bg); }
.criteria-layout {
  display: grid;
  grid-template-columns: 1fr 1.4fr;
  gap: clamp(var(--space-12), 8vw, var(--space-24));
  align-items: start;
}
.criteria-intro {
  font-size: var(--text-base);
  color: var(--color-text-muted);
  line-height: 1.7;
  margin-bottom: var(--space-8);
  margin-top: var(--space-5);
  max-width: 44ch;
}
.criteria-list {
  display: flex;
  flex-direction: column;
  gap: 0;
}
.criteria-item {
  display: flex;
  gap: var(--space-4);
  align-items: flex-start;
  padding: var(--space-5) 0;
  border-bottom: 1px solid var(--color-divider);
}
.criteria-item:last-child { border-bottom: none; }
.criteria-check {
  flex-shrink: 0;
  width: 28px;
  height: 28px;
  border-radius: 50%;
  background: var(--color-primary-bg);
  border: 1px solid rgba(201,160,74,0.2);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-primary);
  margin-top: 1px;
}
.criteria-item strong {
  display: block;
  font-size: var(--text-sm);
  font-weight: 600;
  color: var(--color-text);
  margin-bottom: var(--space-1);
}
.criteria-item p {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  line-height: 1.6;
  max-width: none;
}

/* ═══════════════════════════════════════════════
   CONTACT
════════════════════════════════════════════════ */
.contact-section {
  background: var(--color-surface);
  border-top: 1px solid var(--color-border);
}
.contact-layout {
  display: grid;
  grid-template-columns: 1fr 1.2fr;
  gap: clamp(var(--space-12), 8vw, var(--space-24));
  align-items: start;
}
.contact-intro {
  font-size: var(--text-base);
  color: var(--color-text-muted);
  line-height: 1.7;
  margin-bottom: var(--space-8);
  margin-top: var(--space-5);
  max-width: 46ch;
}
.contact-details {
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
}
.contact-detail-item {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  font-size: var(--text-sm);
  color: var(--color-text-muted);
}
.contact-detail-item svg { color: var(--color-primary); flex-shrink: 0; }
.contact-link { color: var(--color-text-muted); transition: color var(--transition); }
.contact-link:hover { color: var(--color-primary); }

/* ── Contact Form ────────────────────────────── */
.contact-form {
  background: var(--color-surface-offset);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-xl);
  padding: clamp(var(--space-8), 4vw, var(--space-12));
}
.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-4);
}
.form-group {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
  margin-bottom: var(--space-5);
}
.form-label {
  font-size: var(--text-xs);
  font-weight: 500;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--color-text-muted);
}
.form-optional {
  font-weight: 400;
  text-transform: none;
  letter-spacing: 0;
  color: var(--color-text-faint);
}
.form-input {
  width: 100%;
  padding: 0.7rem 1rem;
  background: var(--color-surface-2);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  font-size: var(--text-sm);
  color: var(--color-text);
  transition: border-color var(--transition), box-shadow var(--transition);
  -webkit-appearance: none;
}
.form-input::placeholder { color: var(--color-text-faint); }
.form-input:focus {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px rgba(201,160,74,0.12);
}
.form-select {
  cursor: pointer;
  background-image: url("data:image/svg+xml,%3Csvg width='12' height='8' viewBox='0 0 12 8' fill='none' xmlns='http://www.w3.org/2000/svg'%3E%3Cpath d='M1 1l5 5 5-5' stroke='%238c8880' stroke-width='1.5' stroke-linecap='round'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 1rem center;
  padding-right: 2.5rem;
}
.form-textarea { resize: vertical; min-height: 110px; }
.btn-submit {
  width: 100%;
  justify-content: center;
  position: relative;
}
.btn-loading { display: none; }
.btn-submit.loading .btn-text { display: none; }
.btn-submit.loading .btn-loading { display: block; }

.form-success {
  display: none;
  align-items: center;
  gap: var(--space-3);
  padding: var(--space-4) var(--space-5);
  background: rgba(90,138,63,0.1);
  border: 1px solid rgba(90,138,63,0.25);
  border-radius: var(--radius-md);
  font-size: var(--text-sm);
  color: #7ab856;
  margin-top: var(--space-4);
}
.form-success.visible {
  display: flex;
  animation: fadeIn 0.3s ease;
}
@keyframes fadeIn { from { opacity: 0; transform: translateY(4px); } to { opacity: 1; transform: none; } }

.form-error-text {
  font-size: var(--text-xs);
  color: #c9605a;
  margin-top: var(--space-1);
  display: none;
}
.form-input.error { border-color: #c9605a; }
.form-input.error + .form-error-text { display: block; }

/* ═══════════════════════════════════════════════
   FOOTER
════════════════════════════════════════════════ */
.footer {
  background: var(--color-bg);
  border-top: 1px solid var(--color-border);
  padding-block: clamp(var(--space-12), 6vw, var(--space-20));
}
.footer-inner {
  display: flex;
  flex-direction: column;
  gap: var(--space-8);
}
.footer-brand { display: flex; flex-direction: column; gap: var(--space-3); }
.footer-logo { height: 24px; width: auto; color: var(--color-text-muted); }
.footer-tagline {
  font-size: var(--text-xs);
  color: var(--color-text-faint);
  max-width: 36ch;
  letter-spacing: 0.03em;
}
.footer-nav {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-6);
}
.footer-nav a {
  font-size: var(--text-xs);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--color-text-faint);
  transition: color var(--transition);
}
.footer-nav a:hover { color: var(--color-text-muted); }
.footer-copy {
  font-size: var(--text-xs);
  color: var(--color-text-faint);
  letter-spacing: 0.03em;
  padding-top: var(--space-6);
  border-top: 1px solid var(--color-divider);
}

/* ═══════════════════════════════════════════════
   RESPONSIVE
════════════════════════════════════════════════ */
@media (max-width: 900px) {
  .criteria-layout,
  .contact-layout { grid-template-columns: 1fr; }
  .stat-divider { display: none; }
}
@media (max-width: 768px) {
  .nav { display: none; }
  .nav-toggle { display: flex; }
  .mobile-nav { display: block; }
  .form-row { grid-template-columns: 1fr; }
  .approach-grid { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 500px) {
  .approach-grid { grid-template-columns: 1fr; }
  .hero-actions { flex-direction: column; }
  .thesis-pillars { flex-direction: column; gap: var(--space-5); }
}