/* ============================================================
   YURIKRUMAN.COM — DESIGN SYSTEM
   Aesthetic: Executive Editorial
   Typography: Crimson Pro (display) + DM Sans (body)
   Color: OKLCH warm amber accent on charcoal/cream
   ============================================================ */

/* ============================================================
   0. CSS RESET
   ============================================================ */
*, *::before, *::after {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
  text-size-adjust: 100%;
}

body {
  min-height: 100vh;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
}

img, picture, video, canvas, svg {
  display: block;
  max-width: 100%;
  height: auto;
}

input, button, textarea, select {
  font: inherit;
  color: inherit;
}

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

ul, ol { list-style: none; }

button { cursor: pointer; background: none; border: none; }

/* ============================================================
   1. DESIGN TOKENS
   ============================================================ */
:root {
  /* Brand hue: warm amber/cognac */
  --brand-hue: 65;

  /* Primary amber scale (OKLCH) */
  --amber-50:  oklch(0.97 0.03 var(--brand-hue));
  --amber-100: oklch(0.93 0.05 var(--brand-hue));
  --amber-200: oklch(0.87 0.09 var(--brand-hue));
  --amber-300: oklch(0.78 0.13 var(--brand-hue));
  --amber-400: oklch(0.72 0.15 var(--brand-hue));
  --amber-500: oklch(0.68 0.16 var(--brand-hue));
  --amber-600: oklch(0.60 0.15 var(--brand-hue));
  --amber-700: oklch(0.50 0.13 var(--brand-hue));
  --amber-800: oklch(0.40 0.10 var(--brand-hue));
  --amber-900: oklch(0.30 0.07 var(--brand-hue));

  /* Neutral scale (tinted with brand hue, not pure gray) */
  --neutral-50:  oklch(0.98 0.005 var(--brand-hue));
  --neutral-100: oklch(0.95 0.008 var(--brand-hue));
  --neutral-200: oklch(0.90 0.010 var(--brand-hue));
  --neutral-300: oklch(0.82 0.012 var(--brand-hue));
  --neutral-400: oklch(0.65 0.015 var(--brand-hue));
  --neutral-500: oklch(0.50 0.015 var(--brand-hue));
  --neutral-600: oklch(0.40 0.015 var(--brand-hue));
  --neutral-700: oklch(0.30 0.015 var(--brand-hue));
  --neutral-800: oklch(0.20 0.015 var(--brand-hue));
  --neutral-900: oklch(0.14 0.012 var(--brand-hue));
  --neutral-950: oklch(0.10 0.010 var(--brand-hue));

  /* Semantic color tokens (light mode) */
  --color-bg:          var(--neutral-50);
  --color-bg-cream:    oklch(0.96 0.012 var(--brand-hue));
  --color-bg-dark:     var(--neutral-900);
  --color-surface:     #ffffff;
  --color-text:        var(--neutral-900);
  --color-text-muted:  var(--neutral-500);
  --color-text-on-dark: var(--neutral-100);
  --color-text-muted-on-dark: var(--neutral-400);
  --color-accent:      var(--amber-500);
  --color-accent-hover: var(--amber-600);
  --color-accent-subtle: var(--amber-100);
  --color-border:      var(--neutral-200);
  --color-border-dark: var(--neutral-700);

  /* Functional */
  --color-success: oklch(0.65 0.18 145);
  --color-warning: oklch(0.75 0.15 75);
  --color-error:   oklch(0.60 0.22 25);

  /* Typography */
  --font-display: 'Crimson Pro', Georgia, 'Times New Roman', serif;
  --font-body: 'DM Sans', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;

  /* Fluid 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, 0.9rem + 0.5vw, 1.125rem);
  --text-lg:    clamp(1.125rem, 1rem + 0.6vw, 1.25rem);
  --text-xl:    clamp(1.25rem, 1rem + 1.2vw, 1.5rem);
  --text-2xl:   clamp(1.5rem, 1rem + 2vw, 2rem);
  --text-3xl:   clamp(1.875rem, 1rem + 3.5vw, 3rem);
  --text-4xl:   clamp(2.25rem, 1rem + 5vw, 4rem);
  --text-hero:  clamp(3rem, 1.5rem + 6vw, 5rem);

  /* Spacing (4px grid) */
  --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;
  --space-section: clamp(4rem, 8vw, 8rem);
  --space-hero:    clamp(6rem, 12vw, 10rem);

  /* Layout */
  --max-width: 1200px;
  --max-width-narrow: 800px;
  --grid-padding: clamp(1.25rem, 4vw, 2rem);
  --grid-gap: clamp(1rem, 2vw, 1.5rem);

  /* Shadows */
  --shadow-sm:  0 1px 3px oklch(0 0 0 / 0.08), 0 1px 2px oklch(0 0 0 / 0.04);
  --shadow-md:  0 4px 6px oklch(0 0 0 / 0.06), 0 2px 4px oklch(0 0 0 / 0.04);
  --shadow-lg:  0 10px 15px oklch(0 0 0 / 0.08), 0 4px 6px oklch(0 0 0 / 0.03);
  --shadow-xl:  0 20px 25px oklch(0 0 0 / 0.10), 0 8px 10px oklch(0 0 0 / 0.04);
  --shadow-glow: 0 0 20px oklch(0.68 0.16 65 / 0.25);

  /* Border radius */
  --radius-sm:   0.25rem;
  --radius-md:   0.5rem;
  --radius-lg:   0.75rem;
  --radius-xl:   1rem;
  --radius-2xl:  1.5rem;
  --radius-full: 9999px;

  /* Motion */
  --ease-out:    cubic-bezier(0.16, 1, 0.3, 1);
  --ease-in-out: cubic-bezier(0.65, 0, 0.35, 1);
  --ease-spring: cubic-bezier(0.34, 1.56, 0.64, 1);
  --ease-smooth: cubic-bezier(0.25, 0.1, 0.25, 1);
  --duration-fast:    150ms;
  --duration-normal:  250ms;
  --duration-slow:    400ms;
  --duration-slower:  600ms;
  --duration-slowest: 1000ms;

  /* Nav height */
  --nav-height: 72px;
}

/* ============================================================
   2. DARK MODE TOKENS
   ============================================================ */
[data-theme="dark"] {
  --color-bg:          var(--neutral-950);
  --color-bg-cream:    var(--neutral-900);
  --color-bg-dark:     oklch(0.08 0.008 var(--brand-hue));
  --color-surface:     var(--neutral-900);
  --color-text:        var(--neutral-100);
  --color-text-muted:  var(--neutral-400);
  --color-text-on-dark: var(--neutral-100);
  --color-text-muted-on-dark: var(--neutral-400);
  --color-accent:      var(--amber-400);
  --color-accent-hover: var(--amber-300);
  --color-accent-subtle: oklch(0.20 0.04 var(--brand-hue));
  --color-border:      var(--neutral-800);
  --color-border-dark: var(--neutral-700);

  --shadow-sm:  0 1px 3px oklch(0 0 0 / 0.3), 0 1px 2px oklch(0 0 0 / 0.2);
  --shadow-md:  0 4px 6px oklch(0 0 0 / 0.25), 0 2px 4px oklch(0 0 0 / 0.15);
  --shadow-lg:  0 10px 15px oklch(0 0 0 / 0.3), 0 4px 6px oklch(0 0 0 / 0.15);
  --shadow-xl:  0 20px 25px oklch(0 0 0 / 0.35), 0 8px 10px oklch(0 0 0 / 0.2);
}

/* ============================================================
   3. BASE TYPOGRAPHY
   ============================================================ */
body {
  font-family: var(--font-body);
  font-size: var(--text-base);
  color: var(--color-text);
  background-color: var(--color-bg);
  font-weight: 400;
  transition: background-color var(--duration-slow) var(--ease-smooth),
              color var(--duration-slow) var(--ease-smooth);
}

h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-display);
  font-weight: 700;
  line-height: 1.1;
  letter-spacing: -0.03em;
  color: var(--color-text);
}

h1 { font-size: var(--text-hero); }
h2 { font-size: var(--text-4xl); }
h3 { font-size: var(--text-3xl); }
h4 { font-size: var(--text-2xl); }
h5 { font-size: var(--text-xl); }
h6 { font-size: var(--text-lg); }

p {
  line-height: 1.7;
  max-width: 65ch;
}

p + p { margin-top: var(--space-4); }

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

.text-sm {
  font-size: var(--text-sm);
  line-height: 1.5;
}

.text-xs {
  font-size: var(--text-xs);
  line-height: 1.4;
  letter-spacing: 0.02em;
}

.label {
  font-family: var(--font-body);
  font-size: var(--text-xs);
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--color-accent);
}

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

/* ============================================================
   4. UTILITY CLASSES
   ============================================================ */
.container {
  width: 100%;
  max-width: var(--max-width);
  margin-inline: auto;
  padding-inline: var(--grid-padding);
}

.container-narrow {
  width: 100%;
  max-width: var(--max-width-narrow);
  margin-inline: auto;
  padding-inline: var(--grid-padding);
}

.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;
}

.text-center { text-align: center; }
.text-balance { text-wrap: balance; }

/* ============================================================
   5. NAVIGATION
   ============================================================ */
.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  height: var(--nav-height);
  display: flex;
  align-items: center;
  transition: background-color var(--duration-normal) var(--ease-smooth),
              backdrop-filter var(--duration-normal) var(--ease-smooth),
              box-shadow var(--duration-normal) var(--ease-smooth);
}

.nav.scrolled {
  background-color: oklch(0.99 0.005 var(--brand-hue) / 0.92);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  box-shadow: 0 1px 0 var(--color-border);
}

[data-theme="dark"] .nav.scrolled {
  background-color: oklch(0.12 0.01 var(--brand-hue) / 0.92);
}

.nav__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
  max-width: var(--max-width);
  margin-inline: auto;
  padding-inline: var(--grid-padding);
}

.nav__logo {
  font-family: var(--font-display);
  font-size: var(--text-xl);
  font-weight: 700;
  letter-spacing: -0.02em;
  color: var(--color-text);
  transition: color var(--duration-fast) var(--ease-smooth);
}

/* On dark hero sections, nav text is light */
.nav--hero-dark .nav__logo,
.nav--hero-dark .nav__link,
.nav--hero-dark .nav__toggle,
.nav--hero-dark .theme-toggle {
  color: var(--neutral-100);
}

.nav--hero-dark.scrolled .nav__logo,
.nav--hero-dark.scrolled .nav__link,
.nav--hero-dark.scrolled .nav__toggle,
.nav--hero-dark.scrolled .theme-toggle {
  color: var(--color-text);
}

.nav__links {
  display: flex;
  align-items: center;
  gap: var(--space-8);
}

.nav__link {
  font-size: var(--text-sm);
  font-weight: 500;
  color: var(--color-text-muted);
  position: relative;
  transition: color var(--duration-fast) var(--ease-smooth);
}

.nav__link::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--color-accent);
  transition: width var(--duration-normal) var(--ease-out);
}

.nav__link:hover,
.nav__link.active {
  color: var(--color-text);
}

.nav__link:hover::after,
.nav__link.active::after {
  width: 100%;
}

.nav__actions {
  display: flex;
  align-items: center;
  gap: var(--space-4);
}

/* Theme toggle */
.theme-toggle {
  width: 40px;
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-full);
  color: var(--color-text-muted);
  transition: color var(--duration-fast) var(--ease-smooth),
              background-color var(--duration-fast) var(--ease-smooth);
}

.theme-toggle:hover {
  color: var(--color-text);
  background-color: var(--color-accent-subtle);
}

.theme-toggle svg {
  width: 20px;
  height: 20px;
}

/* Mobile menu toggle */
.nav__toggle {
  display: none;
  width: 40px;
  height: 40px;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 5px;
}

.nav__toggle span {
  display: block;
  width: 22px;
  height: 2px;
  background: currentColor;
  transition: transform var(--duration-normal) var(--ease-out),
              opacity var(--duration-fast) var(--ease-smooth);
}

.nav__toggle.open span:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}
.nav__toggle.open span:nth-child(2) {
  opacity: 0;
}
.nav__toggle.open span:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

/* Mobile menu overlay */
.nav__mobile {
  display: none;
  position: fixed;
  inset: 0;
  background: var(--color-bg);
  z-index: 999;
  padding-top: var(--nav-height);
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: var(--space-8);
  opacity: 0;
  transition: opacity var(--duration-slow) var(--ease-out);
}

.nav__mobile.open {
  display: flex;
  opacity: 1;
}

.nav__mobile .nav__link {
  font-family: var(--font-display);
  font-size: var(--text-3xl);
  color: var(--color-text);
}

/* ============================================================
   6. SECTION PATTERNS
   ============================================================ */
.section {
  padding-block: var(--space-section);
}

.section-light {
  background-color: var(--color-bg);
  color: var(--color-text);
}

.section-cream {
  background-color: var(--color-bg-cream);
  color: var(--color-text);
}

.section-dark {
  background-color: var(--color-bg-dark);
  color: var(--color-text-on-dark);
}

.section-dark h1,
.section-dark h2,
.section-dark h3,
.section-dark h4,
.section-dark h5,
.section-dark h6 {
  color: var(--color-text-on-dark);
}

.section-dark .text-muted,
.section-dark p {
  color: var(--color-text-muted-on-dark);
}

.section-dark .label {
  color: var(--color-accent);
}

/* Hero sections */
.hero {
  padding-top: calc(var(--nav-height) + var(--space-section));
  padding-bottom: var(--space-section);
  min-height: 85vh;
  display: flex;
  align-items: center;
}

.hero-split {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-12);
  align-items: center;
}

.hero-split__content {
  display: flex;
  flex-direction: column;
  gap: var(--space-6);
}

.hero-split__media {
  display: flex;
  justify-content: center;
}

/* Section headers */
.section-header {
  margin-bottom: var(--space-12);
}

.section-header h2 {
  margin-top: var(--space-3);
}

.section-header p {
  margin-top: var(--space-4);
  color: var(--color-text-muted);
  font-size: var(--text-lg);
}

.section-dark .section-header p {
  color: var(--color-text-muted-on-dark);
}

/* ============================================================
   7. CARD COMPONENTS
   ============================================================ */
.card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-8);
  transition: transform var(--duration-normal) var(--ease-out),
              box-shadow var(--duration-normal) var(--ease-out);
}

.card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
}

.section-dark .card {
  background: oklch(0.18 0.015 var(--brand-hue));
  border-color: var(--color-border-dark);
}

[data-theme="dark"] .card {
  background: var(--neutral-900);
  border-color: var(--neutral-800);
}

.card__icon {
  width: 48px;
  height: 48px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-md);
  background: var(--color-accent-subtle);
  color: var(--color-accent);
  margin-bottom: var(--space-4);
  font-size: 1.5rem;
}

.section-dark .card__icon {
  background: oklch(0.25 0.06 var(--brand-hue));
}

.card__title {
  font-family: var(--font-display);
  font-size: var(--text-xl);
  font-weight: 700;
  margin-bottom: var(--space-3);
}

.card__text {
  color: var(--color-text-muted);
  font-size: var(--text-sm);
  line-height: 1.6;
}

.section-dark .card__text {
  color: var(--color-text-muted-on-dark);
}

/* Staggered cards: offset every other card */
.cards-staggered {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--grid-gap);
}

/* Bento grid */
.bento-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--grid-gap);
}

/* ============================================================
   8. BUTTONS
   ============================================================ */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  font-family: var(--font-body);
  font-size: var(--text-sm);
  font-weight: 600;
  padding: var(--space-3) var(--space-6);
  border-radius: var(--radius-md);
  transition: transform var(--duration-fast) var(--ease-out),
              box-shadow var(--duration-fast) var(--ease-out),
              background-color var(--duration-fast) var(--ease-smooth),
              color var(--duration-fast) var(--ease-smooth);
  white-space: nowrap;
}

.btn:hover {
  transform: translateY(-2px);
}

.btn:active {
  transform: translateY(0);
}

.btn-primary {
  background: var(--color-accent);
  color: #ffffff;
  box-shadow: var(--shadow-sm);
}

.btn-primary:hover {
  background: var(--color-accent-hover);
  box-shadow: var(--shadow-md);
}

.btn-secondary {
  background: transparent;
  color: var(--color-text);
  border: 1.5px solid var(--color-border);
}

.btn-secondary:hover {
  border-color: var(--color-accent);
  color: var(--color-accent);
}

.section-dark .btn-secondary {
  color: var(--color-text-on-dark);
  border-color: var(--color-border-dark);
}

.section-dark .btn-secondary:hover {
  border-color: var(--color-accent);
  color: var(--color-accent);
}

.btn-ghost {
  background: transparent;
  color: var(--color-accent);
  padding: var(--space-2) var(--space-3);
}

.btn-ghost:hover {
  background: var(--color-accent-subtle);
}

.btn-group {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-3);
}

/* ============================================================
   9. SOCIAL PROOF BAR
   ============================================================ */
.proof-bar {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: center;
  gap: var(--space-8);
  padding-block: var(--space-8);
  border-top: 1px solid var(--color-border);
  border-bottom: 1px solid var(--color-border);
}

.proof-bar__item {
  font-family: var(--font-body);
  font-size: var(--text-sm);
  font-weight: 600;
  color: var(--color-text-muted);
  letter-spacing: 0.04em;
  text-transform: uppercase;
  opacity: 0.7;
  transition: opacity var(--duration-fast) var(--ease-smooth);
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
}

.proof-bar__item:hover { opacity: 1; }

/* ============================================================
   BRAND WORDMARKS — typographic treatments that evoke each
   brand's actual logo without using trademarked artwork.
   Used in .proof-bar, .logo-grid and other client/media lists.
   ============================================================ */

/* OpenAI: clean, tight, Helvetica-style sans, normal case */
.brand-openai {
  font-family: 'Helvetica Neue', 'Arial', sans-serif;
  font-weight: 500;
  font-size: calc(var(--text-sm) * 1.08);
  letter-spacing: -0.01em;
  text-transform: none;
}

/* Microsoft: Segoe-style sans, regular weight, normal case */
.brand-microsoft {
  font-family: 'Segoe UI', 'Helvetica Neue', sans-serif;
  font-weight: 400;
  font-size: calc(var(--text-sm) * 1.08);
  letter-spacing: 0;
  text-transform: none;
}

/* Forbes: bold italic serif */
.brand-forbes {
  font-family: 'Crimson Pro', 'Georgia', serif;
  font-weight: 700;
  font-style: italic;
  font-size: calc(var(--text-sm) * 1.2);
  letter-spacing: -0.01em;
  text-transform: none;
}

/* Newsweek: condensed serif bold */
.brand-newsweek {
  font-family: 'Crimson Pro', 'Times New Roman', serif;
  font-weight: 700;
  font-size: calc(var(--text-sm) * 1.15);
  letter-spacing: 0;
  text-transform: none;
}

/* Fast Company: black italic sans, condensed */
.brand-fastcompany {
  font-family: 'DM Sans', 'Helvetica Neue', sans-serif;
  font-weight: 700;
  font-style: italic;
  font-size: calc(var(--text-sm) * 1.05);
  letter-spacing: -0.02em;
  text-transform: none;
}

/* Entrepreneur: bold sans */
.brand-entrepreneur {
  font-family: 'DM Sans', sans-serif;
  font-weight: 700;
  font-size: var(--text-sm);
  letter-spacing: -0.01em;
  text-transform: none;
}

/* EY: heavy black sans */
.brand-ey {
  font-family: 'DM Sans', 'Helvetica Neue', sans-serif;
  font-weight: 800;
  font-size: calc(var(--text-sm) * 1.4);
  letter-spacing: -0.02em;
  text-transform: none;
  line-height: 1;
}
.brand-ey-sub {
  font-weight: 500;
  font-size: calc(var(--text-xs) * 0.95);
  letter-spacing: 0.04em;
  margin-left: var(--space-2);
  opacity: 0.75;
}

/* Medtronic: bold sans */
.brand-medtronic {
  font-family: 'DM Sans', sans-serif;
  font-weight: 700;
  font-size: calc(var(--text-sm) * 1.05);
  letter-spacing: -0.01em;
  text-transform: none;
}

/* BBC: white letters in black blocks — iconic and recognizable */
.brand-bbc {
  display: inline-flex;
  gap: 3px;
  text-transform: none;
  letter-spacing: 0;
}
.brand-bbc span {
  display: inline-block;
  background: currentColor;
  color: var(--color-bg-cream);
  font-family: 'Helvetica Neue', 'Arial', sans-serif;
  font-weight: 800;
  font-size: calc(var(--text-sm) * 0.95);
  padding: 2px 6px;
  line-height: 1.1;
}
[data-theme="dark"] .brand-bbc span {
  color: var(--color-bg-dark);
}
.section-dark .brand-bbc span {
  color: var(--color-bg-dark);
}

/* PBS: bold sans, clean */
.brand-pbs {
  font-family: 'DM Sans', sans-serif;
  font-weight: 700;
  font-size: calc(var(--text-sm) * 1.05);
  letter-spacing: 0.02em;
  text-transform: none;
}

/* NYU: bold sans-serif */
.brand-nyu {
  font-family: 'DM Sans', sans-serif;
  font-weight: 800;
  font-size: calc(var(--text-sm) * 1.1);
  letter-spacing: -0.01em;
  text-transform: none;
}

/* Columbia / UPenn / Wharton: serif, formal */
.brand-columbia,
.brand-upenn,
.brand-wharton {
  font-family: 'Crimson Pro', 'Georgia', serif;
  font-weight: 600;
  font-size: calc(var(--text-sm) * 1.05);
  letter-spacing: 0;
  text-transform: none;
  font-style: italic;
}

/* Authority Magazine / Thrive Global / CEOWORLD: serif editorial */
.brand-editorial {
  font-family: 'Crimson Pro', 'Georgia', serif;
  font-weight: 600;
  font-size: calc(var(--text-sm) * 1.05);
  letter-spacing: 0;
  text-transform: none;
}

/* Business.com / HR Tech Outlook: tech sans */
.brand-tech {
  font-family: 'DM Sans', sans-serif;
  font-weight: 600;
  font-size: var(--text-sm);
  letter-spacing: -0.005em;
  text-transform: none;
}

/* Fortress Investment Group / TM Forum / Towers Watson: corporate serif */
.brand-corporate {
  font-family: 'Crimson Pro', 'Georgia', serif;
  font-weight: 600;
  font-size: calc(var(--text-sm) * 1.02);
  letter-spacing: 0.01em;
  text-transform: none;
}

/* When a brand wordmark sits inside .proof-bar__item or .logo-grid__item,
   override the parent's uppercase + letter-spacing so the brand style wins */
.proof-bar__item .brand-openai,
.proof-bar__item .brand-microsoft,
.proof-bar__item .brand-forbes,
.proof-bar__item .brand-newsweek,
.proof-bar__item .brand-fastcompany,
.proof-bar__item .brand-entrepreneur,
.logo-grid__item .brand-openai,
.logo-grid__item .brand-microsoft,
.logo-grid__item .brand-forbes,
.logo-grid__item .brand-newsweek,
.logo-grid__item .brand-fastcompany,
.logo-grid__item .brand-entrepreneur,
.logo-grid__item .brand-ey,
.logo-grid__item .brand-medtronic,
.logo-grid__item .brand-bbc,
.logo-grid__item .brand-pbs,
.logo-grid__item .brand-nyu,
.logo-grid__item .brand-columbia,
.logo-grid__item .brand-upenn,
.logo-grid__item .brand-wharton,
.logo-grid__item .brand-editorial,
.logo-grid__item .brand-tech,
.logo-grid__item .brand-corporate {
  text-transform: none;
  letter-spacing: inherit;
}

/* Increase readability of text logos in logo-grid */
.logo-grid__item {
  font-size: calc(var(--text-sm) * 1.02);
}

/* Logo images: SVG from SimpleIcons CDN or hosted.
   Light bg: desaturate and darken. Dark bg: invert to near-white. */
.proof-bar__logo {
  height: 22px;
  width: auto;
  filter: grayscale(100%) opacity(0.6);
  transition: filter var(--duration-fast) var(--ease-smooth);
}

[data-theme="dark"] .proof-bar__logo {
  filter: grayscale(100%) brightness(0) invert(1) opacity(0.7);
}

.proof-bar__item:hover .proof-bar__logo {
  filter: grayscale(0%) opacity(1);
}

[data-theme="dark"] .proof-bar__item:hover .proof-bar__logo {
  filter: brightness(0) invert(1) opacity(1);
}

/* Logo grid images (speaking page venues) */
.logo-grid__img {
  max-height: 36px;
  width: auto;
  filter: grayscale(100%) opacity(0.65);
  transition: filter var(--duration-fast) var(--ease-smooth),
              opacity var(--duration-fast) var(--ease-smooth);
}

.section-dark .logo-grid__img {
  filter: grayscale(100%) brightness(0) invert(1) opacity(0.75);
}

.logo-grid__item:hover .logo-grid__img {
  filter: grayscale(0%) opacity(1);
}

.section-dark .logo-grid__item:hover .logo-grid__img {
  filter: brightness(0) invert(1) opacity(1);
}

/* ============================================================
   10. STATS STRIP
   ============================================================ */
.stats-strip {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--space-8);
  text-align: center;
}

.stat {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}

.stat__number {
  font-family: var(--font-display);
  font-size: var(--text-4xl);
  font-weight: 700;
  color: var(--color-accent);
  line-height: 1;
}

.stat__label {
  font-size: var(--text-sm);
  color: var(--color-text-muted-on-dark);
}

/* ============================================================
   11. TESTIMONIALS
   ============================================================ */
.testimonial {
  padding: var(--space-8);
  border-left: 3px solid var(--color-accent);
  background: var(--color-surface);
  border-radius: 0 var(--radius-lg) var(--radius-lg) 0;
}

[data-theme="dark"] .testimonial {
  background: var(--neutral-900);
}

.testimonial__quote {
  font-family: var(--font-display);
  font-size: var(--text-lg);
  font-style: italic;
  line-height: 1.6;
  margin-bottom: var(--space-4);
}

.testimonial__author {
  font-weight: 600;
  font-size: var(--text-sm);
}

.testimonial__role {
  font-size: var(--text-xs);
  color: var(--color-text-muted);
}

/* ============================================================
   12. HEADSHOT / PORTRAIT
   ============================================================ */
.portrait {
  position: relative;
  width: 100%;
  max-width: 400px;
}

.portrait img {
  width: 100%;
  aspect-ratio: 3 / 4;
  object-fit: cover;
  border-radius: var(--radius-xl);
}

.portrait::after {
  content: '';
  position: absolute;
  inset: 12px -12px -12px 12px;
  border: 2px solid var(--color-accent);
  border-radius: var(--radius-xl);
  z-index: -1;
}

/* ============================================================
   13. TIMELINE (About page)
   ============================================================ */
.timeline {
  position: relative;
  padding-left: var(--space-8);
}

.timeline::before {
  content: '';
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 2px;
  background: var(--color-border);
}

.timeline__item {
  position: relative;
  padding-bottom: var(--space-10);
}

.timeline__item:last-child { padding-bottom: 0; }

.timeline__item::before {
  content: '';
  position: absolute;
  left: calc(-1 * var(--space-8) - 5px);
  top: 6px;
  width: 12px;
  height: 12px;
  border-radius: var(--radius-full);
  background: var(--color-accent);
  border: 2px solid var(--color-bg);
}

[data-theme="dark"] .timeline__item::before {
  border-color: var(--color-bg);
}

.timeline__date {
  font-size: var(--text-xs);
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--color-accent);
  margin-bottom: var(--space-2);
}

.timeline__title {
  font-family: var(--font-display);
  font-size: var(--text-xl);
  font-weight: 700;
  margin-bottom: var(--space-2);
}

.timeline__text {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  line-height: 1.6;
}

/* ============================================================
   14. FORM COMPONENTS
   ============================================================ */
.form-group {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}

.form-label {
  font-size: var(--text-sm);
  font-weight: 500;
}

.form-input,
.form-textarea {
  width: 100%;
  padding: var(--space-3) var(--space-4);
  background: var(--color-surface);
  border: 1.5px solid var(--color-border);
  border-radius: var(--radius-md);
  font-size: var(--text-base);
  transition: border-color var(--duration-fast) var(--ease-smooth),
              box-shadow var(--duration-fast) var(--ease-smooth);
}

.form-input:focus,
.form-textarea:focus {
  outline: none;
  border-color: var(--color-accent);
  box-shadow: 0 0 0 3px oklch(0.68 0.16 65 / 0.15);
}

[data-theme="dark"] .form-input,
[data-theme="dark"] .form-textarea {
  background: var(--neutral-900);
  border-color: var(--neutral-700);
}

.form-textarea {
  min-height: 150px;
  resize: vertical;
}

.form-status {
  padding: var(--space-3) var(--space-4);
  border-radius: var(--radius-md);
  font-size: var(--text-sm);
  font-weight: 500;
  display: none;
}

.form-status.success {
  display: block;
  background: oklch(0.95 0.05 145);
  color: oklch(0.35 0.12 145);
}

.form-status.error {
  display: block;
  background: oklch(0.95 0.05 25);
  color: oklch(0.40 0.15 25);
}

/* ============================================================
   15. FAQ ACCORDION
   ============================================================ */
.faq-item {
  border-bottom: 1px solid var(--color-border);
}

.faq-question {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-4);
  padding: var(--space-5) 0;
  font-family: var(--font-display);
  font-size: var(--text-lg);
  font-weight: 600;
  text-align: left;
  color: var(--color-text);
  cursor: pointer;
  transition: color var(--duration-fast) var(--ease-smooth);
}

.faq-question:hover { color: var(--color-accent); }

.faq-question svg {
  width: 20px;
  height: 20px;
  flex-shrink: 0;
  transition: transform var(--duration-normal) var(--ease-out);
}

.faq-item.open .faq-question svg {
  transform: rotate(45deg);
}

.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height var(--duration-slow) var(--ease-out);
}

.faq-answer__inner {
  padding-bottom: var(--space-5);
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  line-height: 1.7;
}

/* ============================================================
   16. FOOTER
   ============================================================ */
.footer {
  padding-block: var(--space-16);
  background: var(--color-bg-dark);
  color: var(--color-text-on-dark);
}

.footer__inner {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-10);
}

.footer__brand {
  font-family: var(--font-display);
  font-size: var(--text-2xl);
  font-weight: 700;
  margin-bottom: var(--space-4);
}

.footer__text {
  font-size: var(--text-sm);
  color: var(--color-text-muted-on-dark);
  max-width: 35ch;
  line-height: 1.6;
}

.footer__heading {
  font-family: var(--font-body);
  font-size: var(--text-xs);
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--color-accent);
  margin-bottom: var(--space-4);
}

.footer__link {
  display: block;
  font-size: var(--text-sm);
  color: var(--color-text-muted-on-dark);
  padding-block: var(--space-1);
  transition: color var(--duration-fast) var(--ease-smooth);
}

.footer__link:hover { color: var(--color-text-on-dark); }

.footer__bottom {
  margin-top: var(--space-10);
  padding-top: var(--space-6);
  border-top: 1px solid var(--color-border-dark);
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  align-items: center;
  gap: var(--space-4);
  font-size: var(--text-xs);
  color: var(--color-text-muted-on-dark);
}

.footer__social {
  display: flex;
  gap: var(--space-4);
}

.footer__social a {
  color: var(--color-text-muted-on-dark);
  transition: color var(--duration-fast) var(--ease-smooth);
}

.footer__social a:hover { color: var(--color-accent); }

.footer__social svg {
  width: 20px;
  height: 20px;
}

/* ============================================================
   17. MOTION SYSTEM
   ============================================================ */

/* Scroll reveal: elements start visible (progressive enhancement),
   JS adds .reveal-init to hide them, then .visible to animate in */
.reveal {
  opacity: 1;
  transform: translateY(0);
}

.reveal-init .reveal {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity var(--duration-slower) var(--ease-out),
              transform var(--duration-slower) var(--ease-out);
}

.reveal-init .reveal.visible {
  opacity: 1;
  transform: translateY(0);
}

/* Stagger children */
.reveal-init .reveal:nth-child(1) { transition-delay: 0ms; }
.reveal-init .reveal:nth-child(2) { transition-delay: 80ms; }
.reveal-init .reveal:nth-child(3) { transition-delay: 120ms; }
.reveal-init .reveal:nth-child(4) { transition-delay: 200ms; }
.reveal-init .reveal:nth-child(5) { transition-delay: 280ms; }
.reveal-init .reveal:nth-child(6) { transition-delay: 360ms; }

/* Reduced motion: disable all animation */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    transition-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
  }
  .reveal-init .reveal {
    opacity: 1;
    transform: none;
    transition: none;
  }
}

/* ============================================================
   18. RESPONSIVE
   ============================================================ */

/* 640px: Small tablets */
@media (min-width: 640px) {
  .stats-strip {
    grid-template-columns: repeat(4, 1fr);
  }

  .cards-staggered {
    grid-template-columns: repeat(2, 1fr);
  }

  .bento-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .footer__inner {
    grid-template-columns: repeat(2, 1fr);
  }
}

/* 768px: Tablets */
@media (min-width: 768px) {
  .hero-split {
    grid-template-columns: 55fr 45fr;
    gap: var(--space-16);
  }

  .hero-split--reverse {
    grid-template-columns: 45fr 55fr;
  }

  .hero-split--reverse .hero-split__media {
    order: -1;
  }

  .cards-staggered .card:nth-child(even) {
    transform: translateY(var(--space-8));
  }

  .testimonials-grid {
    display: grid;
    grid-template-columns: 7fr 5fr;
    gap: var(--grid-gap);
  }

  .contact-grid {
    display: grid;
    grid-template-columns: 7fr 5fr;
    gap: var(--space-12);
  }
}

/* 1024px: Desktop */
@media (min-width: 1024px) {
  .nav__toggle { display: none; }

  .nav__links { display: flex; }

  .cards-staggered {
    grid-template-columns: repeat(3, 1fr);
  }

  .bento-grid {
    grid-template-columns: repeat(3, 1fr);
  }

  .bento-grid .card:first-child {
    grid-column: span 2;
  }

  .footer__inner {
    grid-template-columns: 2fr 1fr 1fr 1fr;
  }

  .service-split {
    display: grid;
    grid-template-columns: 7fr 5fr;
    gap: var(--space-16);
    align-items: center;
  }

  .service-split--reverse {
    grid-template-columns: 5fr 7fr;
  }

  .service-split--reverse > *:first-child {
    order: 1;
  }
}

/* Below 1024px: mobile nav */
@media (max-width: 1023px) {
  .nav__links { display: none; }
  .nav__toggle { display: flex; }
}

/* ============================================================
   19. PAGE-SPECIFIC STYLES
   ============================================================ */

/* Book cards */
.book-card {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-6);
  align-items: start;
}

.book-card__cover {
  aspect-ratio: 2 / 3;
  background: linear-gradient(135deg, var(--neutral-800), var(--neutral-900));
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-display);
  font-size: var(--text-lg);
  color: var(--color-accent);
  text-align: center;
  padding: var(--space-6);
  box-shadow: var(--shadow-lg);
  overflow: hidden;
  position: relative;
}

/* When a real book cover image is used, it should fill the container */
.book-card__cover img {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  border-radius: var(--radius-md);
}

/* Video gallery (speaking page) */
.video-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-6);
}

@media (min-width: 768px) {
  .video-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

.video-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  transition: transform var(--duration-normal) var(--ease-out),
              box-shadow var(--duration-normal) var(--ease-out);
}

.video-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
}

[data-theme="dark"] .video-card {
  background: var(--neutral-900);
  border-color: var(--neutral-800);
}

.video-card__thumb {
  aspect-ratio: 16 / 9;
  background: linear-gradient(135deg, var(--neutral-800), var(--neutral-900));
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-accent);
}

.video-card__thumb::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, transparent 60%, rgba(0,0,0,0.4) 100%);
}

.video-card__play {
  width: 64px;
  height: 64px;
  border-radius: var(--radius-full);
  background: var(--color-accent);
  display: flex;
  align-items: center;
  justify-content: center;
  color: white;
  position: relative;
  z-index: 1;
  box-shadow: var(--shadow-lg);
}

.video-card__body {
  padding: var(--space-5) var(--space-6);
}

.video-card__title {
  font-family: var(--font-display);
  font-size: var(--text-lg);
  font-weight: 600;
  margin-bottom: var(--space-1);
}

.video-card__meta {
  font-size: var(--text-xs);
  color: var(--color-text-muted);
  letter-spacing: 0.05em;
  text-transform: uppercase;
}

.book-card__content {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}

/* Topic cards (speaking page) */
.topic-card {
  padding: var(--space-6);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  transition: border-color var(--duration-fast) var(--ease-smooth);
}

.topic-card:hover {
  border-color: var(--color-accent);
}

/* Venue / media logo grid */
.logo-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--space-6);
  align-items: center;
}

.logo-grid__item {
  display: flex;
  align-items: center;
  justify-content: center;
  padding: var(--space-4);
  font-family: var(--font-body);
  font-size: var(--text-sm);
  font-weight: 600;
  color: var(--color-text-muted);
  letter-spacing: 0.03em;
  opacity: 0.7;
  transition: opacity var(--duration-fast) var(--ease-smooth);
}

.logo-grid__item:hover { opacity: 1; }

@media (min-width: 640px) {
  .logo-grid {
    grid-template-columns: repeat(3, 1fr);
  }

  .book-card {
    grid-template-columns: 180px 1fr;
  }
}

@media (min-width: 1024px) {
  .logo-grid {
    grid-template-columns: repeat(4, 1fr);
  }
}

/* Pull quote */
.pull-quote {
  font-family: var(--font-display);
  font-size: var(--text-3xl);
  font-weight: 400;
  font-style: italic;
  line-height: 1.4;
  text-align: center;
  max-width: 50ch;
  margin-inline: auto;
  color: var(--color-text);
  position: relative;
  padding-block: var(--space-4);
}

.pull-quote::before {
  content: '\201C';
  position: absolute;
  top: -0.3em;
  left: -0.15em;
  font-size: 4em;
  color: var(--color-accent);
  opacity: 0.3;
  line-height: 1;
}

/* CTA sections */
.cta-section {
  text-align: center;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-6);
}

.cta-section h2 {
  max-width: 20ch;
}

.cta-section p {
  max-width: 50ch;
  margin-inline: auto;
}