/* === TERRAPHIM ESSENTIALIST DESIGN TOKENS === */
:root {
  /* Colors - oklch for perceptual uniformity */
  --ink-900: #0a0a0a;
  --ink-700: #2d2d2d;
  --ink-500: #5c5c5c;
  --silver-400: #9e9e9e;
  --silver-200: #d4d4d4;
  --silver-100: #ebebeb;
  --silver-50: #f5f5f5;
  --white: #ffffff;
  --signal-error: #b91c1c;
  --signal-success: #166534;
  --signal-focus: #1d4ed8;

  /* Spacing - rem for accessibility */
  --space-1: 0.25rem;
  --space-2: 0.5rem;
  --space-3: 0.75rem;
  --space-4: 1rem;
  --space-6: 1.5rem;
  --space-8: 2rem;
  --space-12: 3rem;
  --space-16: 4rem;
  --space-24: 6rem;

  /* Typography */
  --font-display: 'Alumni Sans Pinstripe', system-ui, sans-serif;
  --font-body: 'Jura', system-ui, sans-serif;
  --font-mono: 'JetBrains Mono', ui-monospace, monospace;

  /* Fluid Type Scale */
  --text-xs: clamp(0.7rem, 0.65rem + 0.25vw, 0.75rem);
  --text-sm: clamp(0.8rem, 0.75rem + 0.25vw, 0.875rem);
  --text-base: clamp(0.95rem, 0.9rem + 0.25vw, 1rem);
  --text-lg: clamp(1.1rem, 1rem + 0.5vw, 1.25rem);
  --text-xl: clamp(1.25rem, 1.1rem + 0.75vw, 1.5rem);
  --text-2xl: clamp(1.5rem, 1.25rem + 1vw, 2rem);
  --text-3xl: clamp(1.75rem, 1.5rem + 1.5vw, 2.5rem);
  --text-4xl: clamp(2rem, 1.75rem + 2vw, 3rem);
  --text-5xl: clamp(2.5rem, 2rem + 2.5vw, 4rem);

  /* Timing */
  --duration-instant: 100ms;
  --duration-quick: 150ms;
  --duration-standard: 250ms;
  --duration-deliberate: 400ms;
  --ease-out-expo: cubic-bezier(0.16, 1, 0.3, 1);
  --ease-in-expo: cubic-bezier(0.7, 0, 0.84, 0);
  --ease-subtle: cubic-bezier(0.25, 0.1, 0.25, 1);

  /* Neumorphic */
  --light-source: rgba(255, 255, 255, 0.5);
  --shadow-source: rgba(0, 0, 0, 0.5);
  --radius-sm: 0.5rem;
  --radius-md: 0.75rem;

  /* Layout */
  --max-wide-content: 75rem;
  --container-padding: clamp(1rem, 5vw, 3rem);
  --min-touch-target: 2.75rem;
}

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-body);
  font-size: var(--text-base);
  line-height: 1.5;
  color: var(--ink-900);
  background: var(--silver-50);
  min-height: 100vh;
  -webkit-font-smoothing: antialiased;
}

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

/* === UTILITIES === */
.center {
  max-inline-size: var(--max-wide-content);
  margin-inline: auto;
  padding-inline: var(--container-padding);
}

/* === NAVIGATION === */
.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--space-4) var(--container-padding);
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  background: var(--silver-50);
}

.nav__logo {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  text-decoration: none;
  color: var(--ink-900);
}

.nav__logo svg {
  width: 2.5rem;
  height: 2.5rem;
}

.nav__logo-text {
  font-family: var(--font-display);
  font-size: var(--text-xl);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.nav__logo-pro {
  color: var(--ink-500);
}

.nav__links {
  display: flex;
  gap: var(--space-2);
  list-style: none;
}

.nav__link {
  --depth: 1;
  position: relative;
  display: inline-flex;
  padding: var(--space-2) var(--space-4);
  border-radius: var(--radius-sm);
  background: transparent;
  color: var(--ink-700);
  text-decoration: none;
  font-weight: 500;
  transition: color var(--duration-instant), background var(--duration-quick), box-shadow var(--duration-quick);
}

.nav__link::before {
  content: '';
  position: absolute;
  inset: 0;
  border-radius: inherit;
  pointer-events: none;
  box-shadow: var(--light-source) 0 0 0;
  transition: box-shadow var(--duration-quick);
}

.nav__link:hover {
  color: var(--ink-900);
  background: var(--silver-100);
  box-shadow: var(--shadow-source) calc(0.2rem * var(--depth)) calc(0.2rem * var(--depth)) 0.4rem;
}

.nav__link:hover::before {
  box-shadow: var(--light-source) calc(-0.2rem * var(--depth)) calc(-0.2rem * var(--depth)) 0.4rem;
}

@media (max-width: 48em) {
  .nav__links {
    display: none;
  }
}

/* === HERO === */
.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  padding-top: var(--space-16);
}

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

@media (min-width: 60em) {
  .hero__content {
    grid-template-columns: 1.2fr 1fr;
  }
}

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

.hero__title {
  font-family: var(--font-display);
  font-size: var(--text-5xl);
  font-weight: 400;
  line-height: 0.9;
  text-transform: uppercase;
  letter-spacing: 0.02em;
  color: var(--ink-900);
}

.hero__title span {
  display: block;
  color: var(--ink-500);
}

.hero__subtitle {
  font-size: var(--text-xl);
  color: var(--ink-700);
  max-width: 50ch;
}

.hero__cta {
  display: flex;
  gap: var(--space-4);
  margin-top: var(--space-4);
  flex-wrap: wrap;
}

/* Stagger reveal */
.stagger-reveal > * {
  opacity: 0;
  transform: translateY(1rem);
  animation: reveal-up var(--duration-deliberate) var(--ease-out-expo) forwards;
}

.stagger-reveal > *:nth-child(1) { animation-delay: 0ms; }
.stagger-reveal > *:nth-child(2) { animation-delay: 100ms; }
.stagger-reveal > *:nth-child(3) { animation-delay: 200ms; }
.stagger-reveal > *:nth-child(4) { animation-delay: 300ms; }

@keyframes reveal-up {
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* Hero Visual - Tile Grid */
.hero__visual {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-4);
  padding: var(--space-8);
}

.tile {
  --depth: 1;
  position: relative;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  gap: var(--space-2);
  aspect-ratio: 1;
  border-radius: var(--radius-md);
  background: var(--silver-100);
  font-family: var(--font-display);
  font-size: var(--text-sm);
  text-transform: uppercase;
  color: var(--ink-700);
}

.tile i {
  font-size: var(--text-2xl);
}

.tile::before {
  content: '';
  position: absolute;
  inset: 0;
  border-radius: inherit;
  pointer-events: none;
}

.tile--large {
  grid-column: span 2;
  grid-row: span 2;
  font-size: var(--text-lg);
}

.tile--large i {
  font-size: var(--text-4xl);
}

.up {
  box-shadow: var(--shadow-source) calc(0.33rem * var(--depth)) calc(0.33rem * var(--depth)) 0.6rem;
}

.up::before {
  box-shadow: var(--light-source) calc(-0.33rem * var(--depth)) calc(-0.33rem * var(--depth)) 0.6rem;
}

.down {
  box-shadow: inset var(--shadow-source) calc(0.25rem * var(--depth)) calc(0.25rem * var(--depth)) 0.6rem;
}

.down::before {
  box-shadow: inset var(--light-source) calc(-0.25rem * var(--depth)) calc(-0.25rem * var(--depth)) 0.6rem;
}

.tile-button {
  cursor: pointer;
  box-shadow: var(--shadow-source) calc(0.33rem * var(--depth)) calc(0.33rem * var(--depth)) 0.6rem;
  transition: box-shadow var(--duration-quick) var(--duration-quick) ease-in;
}

.tile-button::before {
  box-shadow: var(--light-source) calc(-0.33rem * var(--depth)) calc(-0.33rem * var(--depth)) 0.6rem;
  transition: box-shadow var(--duration-quick) var(--duration-quick) ease-in;
}

.tile-button:hover {
  box-shadow: var(--shadow-source) 0 0 0;
  transition: box-shadow var(--duration-quick) ease-out;
}

.tile-button:hover::before {
  box-shadow: var(--light-source) 0 0 0;
  transition: box-shadow var(--duration-quick) ease-out;
}

.sphere {
  border-radius: 50%;
  background: radial-gradient(circle at 30% 30%, var(--silver-200), var(--silver-100), var(--silver-400));
  box-shadow: var(--shadow-source) 0.5rem 0.5rem 1rem;
}

.sphere::before {
  display: none;
}

/* === BUTTON TILE === */
.btn-tile {
  --depth: 1;
  position: relative;
  display: inline-flex;
  padding: 0.1rem;
  border-radius: var(--radius-sm);
  background: var(--silver-100);
  text-decoration: none;
  cursor: pointer;
  border: none;
  font: inherit;
  box-shadow: var(--shadow-source) calc(0.33rem * var(--depth)) calc(0.33rem * var(--depth)) 0.6rem;
  transition: box-shadow 0.15s 0.15s ease-in;
}

.btn-tile::before {
  content: '';
  position: absolute;
  inset: 0;
  border-radius: inherit;
  pointer-events: none;
  box-shadow: var(--light-source) calc(-0.33rem * var(--depth)) calc(-0.33rem * var(--depth)) 0.6rem;
  transition: box-shadow 0.15s 0.15s ease-in;
}

.btn-tile__inner {
  position: relative;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  padding: var(--space-3) var(--space-6);
  min-block-size: var(--min-touch-target);
  border-radius: calc(var(--radius-sm) - 2px);
  background: var(--silver-100);
  color: var(--ink-900);
  font-weight: 500;
  box-shadow: inset var(--shadow-source) 0 0 0;
  transition: box-shadow 0.15s ease-in;
}

.btn-tile__inner::before {
  content: '';
  position: absolute;
  inset: 0;
  border-radius: inherit;
  pointer-events: none;
  box-shadow: inset var(--light-source) 0 0 0;
  transition: box-shadow 0.15s ease-in;
}

.btn-tile__inner span,
.btn-tile__inner i {
  transition: transform 0.3s ease-in-out;
}

.btn-tile:hover {
  box-shadow: var(--shadow-source) 0 0 0;
  transition: box-shadow 0.15s ease-out;
}

.btn-tile:hover::before {
  box-shadow: var(--light-source) 0 0 0;
  transition: box-shadow 0.15s ease-out;
}

.btn-tile:hover .btn-tile__inner {
  box-shadow: inset var(--shadow-source) calc(0.25rem * var(--depth)) calc(0.25rem * var(--depth)) 0.6rem;
  transition: box-shadow 0.15s 0.15s ease-out;
}

.btn-tile:hover .btn-tile__inner::before {
  box-shadow: inset var(--light-source) calc(-0.25rem * var(--depth)) calc(-0.25rem * var(--depth)) 0.6rem;
  transition: box-shadow 0.15s 0.15s ease-out;
}

.btn-tile:hover .btn-tile__inner span,
.btn-tile:hover .btn-tile__inner i {
  transform: translateY(0.1516rem);
}

.btn-tile--primary .btn-tile__inner {
  background: var(--ink-900);
  color: var(--white);
}

.btn-tile--dark {
  background: var(--ink-700);
}

.btn-tile--dark .btn-tile__inner {
  background: var(--ink-700);
  color: var(--white);
}

.btn-tile--dark::before {
  box-shadow: rgba(255, 255, 255, 0.1) calc(-0.33rem * var(--depth)) calc(-0.33rem * var(--depth)) 0.6rem;
}

.btn-tile--dark:hover .btn-tile__inner {
  box-shadow: inset rgba(0, 0, 0, 0.5) calc(0.25rem * var(--depth)) calc(0.25rem * var(--depth)) 0.6rem;
}

.btn-tile--dark:hover .btn-tile__inner::before {
  box-shadow: inset rgba(255, 255, 255, 0.1) calc(-0.25rem * var(--depth)) calc(-0.25rem * var(--depth)) 0.6rem;
}

.btn-tile:focus-visible {
  outline: 2px solid var(--signal-focus);
  outline-offset: 2px;
}

/* === PROBLEM/SOLUTION SECTION === */
.problem-solution {
  padding: var(--space-16) 0;
  background: var(--white);
}

.promises__grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-6);
}

@media (max-width: 60em) {
  .promises__grid {
    grid-template-columns: 1fr;
  }
}

.promise {
  --depth: 2;
  position: relative;
  padding: var(--space-8);
  background: var(--silver-50);
  border-radius: var(--radius-md);
  text-align: center;
  box-shadow: var(--shadow-source) calc(0.33rem * var(--depth)) calc(0.33rem * var(--depth)) 0.6rem;
}

.promise::before {
  content: '';
  position: absolute;
  inset: 0;
  border-radius: inherit;
  box-shadow: var(--light-source) calc(-0.33rem * var(--depth)) calc(-0.33rem * var(--depth)) 0.6rem;
  pointer-events: none;
}

.promise--solution {
  background: var(--ink-900);
  color: var(--white);
}

.promise--solution .promise__text {
  color: var(--silver-200);
}

.promise__icon {
  font-size: var(--text-3xl);
  color: var(--ink-700);
  margin-bottom: var(--space-4);
}

.promise--solution .promise__icon {
  color: var(--silver-200);
}

.promise__title {
  font-family: var(--font-display);
  font-size: var(--text-2xl);
  text-transform: uppercase;
  margin-bottom: var(--space-3);
}

.promise__text {
  color: var(--ink-700);
  font-size: var(--text-sm);
}

/* === SECTION HEADER === */
.section-header {
  text-align: center;
  margin-bottom: var(--space-12);
}

.section-header__title {
  font-family: var(--font-display);
  font-size: var(--text-3xl);
  font-weight: 400;
  text-transform: uppercase;
  color: var(--ink-900);
  margin-bottom: var(--space-2);
}

.section-header__subtitle {
  color: var(--ink-500);
}

/* === CONNECTORS SECTION === */
.connectors {
  padding: var(--space-16) 0;
}

.features__grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(min(100%, 320px), 1fr));
  gap: var(--space-6);
}

/* Feature Card */
.feature-card {
  --depth: 2;
  position: relative;
  padding: var(--space-8);
  border-radius: var(--radius-md);
  background: var(--white);
  box-shadow: var(--shadow-source) calc(0.33rem * var(--depth)) calc(0.33rem * var(--depth)) 0.6rem;
  transition: transform var(--duration-quick) var(--ease-subtle);
}

.feature-card::before {
  content: '';
  position: absolute;
  inset: 0;
  border-radius: inherit;
  pointer-events: none;
  box-shadow: var(--light-source) calc(-0.33rem * var(--depth)) calc(-0.33rem * var(--depth)) 0.6rem;
}

.feature-card:hover {
  --depth: 3;
  transform: translateY(-4px);
}

.feature-card__icon {
  --depth: 1;
  width: 4rem;
  height: 4rem;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--silver-100);
  border-radius: var(--radius-sm);
  color: var(--ink-700);
  font-size: var(--text-xl);
  margin-bottom: var(--space-6);
  box-shadow: inset var(--shadow-source) calc(0.25rem * var(--depth)) calc(0.25rem * var(--depth)) 0.6rem;
  position: relative;
}

.feature-card__icon::before {
  content: '';
  position: absolute;
  inset: 0;
  border-radius: inherit;
  box-shadow: inset var(--light-source) calc(-0.25rem * var(--depth)) calc(-0.25rem * var(--depth)) 0.6rem;
}

.feature-card__title {
  font-size: var(--text-xl);
  font-weight: 600;
  color: var(--ink-900);
  margin-bottom: var(--space-3);
}

.feature-card__description {
  color: var(--ink-700);
  font-size: var(--text-sm);
  line-height: 1.6;
}

.feature-card__list {
  margin-top: var(--space-4);
  list-style: none;
}

.feature-card__list li {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-1) 0;
  font-size: var(--text-sm);
  color: var(--ink-500);
}

.feature-card__list li i {
  color: var(--ink-700);
  font-size: var(--text-sm);
}

/* Highlight Card */
.feature-card--highlight {
  background: var(--ink-900);
  color: var(--white);
  grid-column: span 2;
}

@media (max-width: 60em) {
  .feature-card--highlight {
    grid-column: span 1;
  }
}

.feature-card--highlight .feature-card__icon {
  background: var(--ink-700);
  color: var(--silver-200);
  box-shadow: inset rgba(0, 0, 0, 0.7) calc(0.25rem * var(--depth)) calc(0.25rem * var(--depth)) 0.6rem;
}

.feature-card--highlight .feature-card__icon::before {
  box-shadow: inset rgba(255, 255, 255, 0.1) calc(-0.25rem * var(--depth)) calc(-0.25rem * var(--depth)) 0.6rem;
}

.feature-card--highlight .feature-card__title {
  color: var(--white);
}

.feature-card--highlight .feature-card__description {
  color: var(--silver-200);
}

.feature-card--highlight .feature-card__list li {
  color: var(--silver-400);
}

.feature-card--highlight .feature-card__list li i {
  color: var(--silver-200);
}

/* === HOW IT WORKS === */
.how-it-works {
  padding: var(--space-16) 0;
  background: var(--silver-100);
}

.explanation__grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: var(--space-8);
}

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

.explanation__number {
  font-family: var(--font-display);
  font-size: var(--text-4xl);
  color: var(--silver-200);
  line-height: 1;
}

.explanation__title {
  font-size: var(--text-lg);
  font-weight: 600;
  color: var(--ink-900);
}

.explanation__text {
  color: var(--ink-700);
  font-size: var(--text-sm);
}

/* === PRICING === */
.pricing {
  padding: var(--space-24) 0;
}

.pricing__grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: var(--space-6);
  margin-bottom: var(--space-8);
}

.pricing-card {
  --depth: 2;
  position: relative;
  display: flex;
  flex-direction: column;
  background: var(--white);
  border-radius: var(--radius-md);
  overflow: hidden;
  box-shadow: var(--shadow-source) calc(0.33rem * var(--depth)) calc(0.33rem * var(--depth)) 0.6rem;
}

.pricing-card::before {
  content: '';
  position: absolute;
  inset: 0;
  border-radius: inherit;
  pointer-events: none;
  box-shadow: var(--light-source) calc(-0.33rem * var(--depth)) calc(-0.33rem * var(--depth)) 0.6rem;
}

.pricing-card--popular {
  transform: scale(1.05);
  z-index: 1;
}

.pricing-card__badge {
  position: absolute;
  top: 0;
  right: 0;
  padding: var(--space-1) var(--space-4);
  background: var(--ink-900);
  color: var(--white);
  font-size: var(--text-xs);
  text-transform: uppercase;
  font-weight: 600;
  letter-spacing: 0.05em;
}

.pricing-card__header {
  padding: var(--space-8) var(--space-6) var(--space-4);
  text-align: center;
  border-bottom: 1px solid var(--silver-100);
}

.pricing-card__title {
  font-family: var(--font-display);
  font-size: var(--text-2xl);
  text-transform: uppercase;
  margin-bottom: var(--space-2);
}

.pricing-card__price {
  display: flex;
  align-items: baseline;
  justify-content: center;
  gap: var(--space-1);
}

.pricing-card__amount {
  font-family: var(--font-display);
  font-size: var(--text-4xl);
  color: var(--ink-900);
}

.pricing-card__period {
  color: var(--ink-500);
  font-size: var(--text-sm);
}

.pricing-card__body {
  flex: 1;
  padding: var(--space-6);
}

.pricing-card__description {
  text-align: center;
  color: var(--ink-500);
  font-size: var(--text-sm);
  margin-bottom: var(--space-6);
}

.pricing-card__features {
  list-style: none;
}

.pricing-card__features li {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-2) 0;
  font-size: var(--text-sm);
  color: var(--ink-700);
}

.pricing-card__features li i {
  color: var(--signal-success);
}

.pricing-card__footer {
  padding: var(--space-4) var(--space-6) var(--space-6);
  text-align: center;
}

.pricing-card__footer .btn-tile {
  width: 100%;
}

.pricing__addon {
  text-align: center;
  color: var(--ink-500);
  font-size: var(--text-sm);
}

/* === SKILLS PREVIEW === */
.skills-preview {
  padding: var(--space-16) 0;
  background: var(--silver-100);
}

.terminal {
  --depth: 2;
  position: relative;
  background: var(--ink-900);
  border-radius: var(--radius-md);
  overflow: hidden;
  box-shadow: var(--shadow-source) calc(0.33rem * var(--depth)) calc(0.33rem * var(--depth)) 0.6rem;
  margin-bottom: var(--space-12);
}

.terminal__header {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-3) var(--space-4);
  background: var(--ink-700);
}

.terminal__dot {
  width: 0.75rem;
  height: 0.75rem;
  border-radius: 50%;
  background: var(--silver-400);
}

.terminal__dot--red { background: #ef4444; }
.terminal__dot--yellow { background: #eab308; }
.terminal__dot--green { background: #22c55e; }

.terminal__title {
  flex: 1;
  text-align: center;
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  color: var(--silver-400);
}

.terminal__body {
  padding: var(--space-4);
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  color: var(--silver-200);
  line-height: 1.6;
}

.terminal__prompt { color: var(--silver-400); }
.terminal__command { color: var(--white); }
.terminal__output { color: var(--silver-400); }
.terminal__highlight { color: #22c55e; }

.skills-preview__grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: var(--space-4);
}

.skill-item {
  --depth: 1;
  position: relative;
  padding: var(--space-6);
  background: var(--white);
  border-radius: var(--radius-md);
  text-align: center;
  box-shadow: var(--shadow-source) calc(0.2rem * var(--depth)) calc(0.2rem * var(--depth)) 0.4rem;
}

.skill-item::before {
  content: '';
  position: absolute;
  inset: 0;
  border-radius: inherit;
  pointer-events: none;
  box-shadow: var(--light-source) calc(-0.2rem * var(--depth)) calc(-0.2rem * var(--depth)) 0.4rem;
}

.skill-item i {
  font-size: var(--text-2xl);
  color: var(--ink-500);
  margin-bottom: var(--space-3);
}

.skill-item h4 {
  font-size: var(--text-base);
  font-weight: 600;
  margin-bottom: var(--space-2);
}

.skill-item p {
  font-size: var(--text-sm);
  color: var(--ink-500);
}

/* === FAQ === */
.faq {
  padding: var(--space-16) 0;
}

.faq__list {
  max-width: 50rem;
  margin-inline: auto;
}

.faq__item {
  --depth: 1;
  position: relative;
  margin-bottom: var(--space-4);
  background: var(--white);
  border-radius: var(--radius-md);
  overflow: hidden;
  box-shadow: var(--shadow-source) calc(0.2rem * var(--depth)) calc(0.2rem * var(--depth)) 0.4rem;
}

.faq__item::before {
  content: '';
  position: absolute;
  inset: 0;
  border-radius: inherit;
  pointer-events: none;
  box-shadow: var(--light-source) calc(-0.2rem * var(--depth)) calc(-0.2rem * var(--depth)) 0.4rem;
}

.faq__question {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--space-4) var(--space-6);
  cursor: pointer;
  font-weight: 500;
  list-style: none;
}

.faq__question::-webkit-details-marker {
  display: none;
}

.faq__question span {
  flex: 1;
}

.faq__question i {
  transition: transform var(--duration-standard);
  color: var(--ink-500);
}

.faq__item[open] .faq__question i {
  transform: rotate(180deg);
}

.faq__answer {
  padding: 0 var(--space-6) var(--space-4);
  color: var(--ink-700);
  font-size: var(--text-sm);
  line-height: 1.6;
}

/* === CTA DARK === */
.cta-dark {
  padding: var(--space-16) 0;
  background: var(--ink-900);
  color: var(--white);
  text-align: center;
}

.cta-dark__title {
  font-family: var(--font-display);
  font-size: var(--text-3xl);
  text-transform: uppercase;
  margin-bottom: var(--space-4);
}

.cta-dark__text {
  color: var(--silver-400);
  margin-bottom: var(--space-8);
}

.cta-dark__buttons {
  display: flex;
  justify-content: center;
  gap: var(--space-4);
  flex-wrap: wrap;
}

/* === FOOTER === */
.footer {
  padding: var(--space-8) var(--container-padding);
  background: var(--ink-900);
  color: var(--silver-400);
  border-top: 1px solid var(--ink-700);
}

.footer__content {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: var(--space-4);
}

.footer__brand {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  font-family: var(--font-display);
  font-size: var(--text-lg);
  text-transform: uppercase;
  color: var(--white);
}

.footer__links {
  display: flex;
  gap: var(--space-6);
  list-style: none;
}

.footer__link {
  color: var(--silver-400);
  text-decoration: none;
  font-size: var(--text-sm);
  transition: color var(--duration-instant);
}

.footer__link:hover {
  color: var(--white);
}

.footer__link i {
  margin-right: var(--space-1);
}

.footer__copyright {
  width: 100%;
  text-align: center;
  font-size: var(--text-xs);
  color: var(--ink-500);
  margin-top: var(--space-4);
  padding-top: var(--space-4);
  border-top: 1px solid var(--ink-700);
}

@media (max-width: 48em) {
  .footer__content {
    flex-direction: column;
    text-align: center;
  }

  .footer__links {
    flex-wrap: wrap;
    justify-content: center;
  }
}

/* === ANNOUNCEMENT BANNER === */
.announcement-banner {
  background: linear-gradient(135deg, var(--ink-900) 0%, var(--ink-700) 100%);
  color: var(--white);
  padding: var(--space-3) 0;
  font-size: var(--text-sm);
  position: relative;
  overflow: hidden;
}

.announcement-banner .center {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-3);
  flex-wrap: wrap;
}

.announcement-banner i:first-child {
  color: #fbbf24;
}

.announcement-banner__link {
  color: var(--silver-200);
  text-decoration: none;
  font-weight: 500;
  display: inline-flex;
  align-items: center;
  gap: var(--space-1);
  transition: color var(--duration-instant);
}

.announcement-banner__link:hover {
  color: var(--white);
}

.announcement-banner__link i {
  font-size: 0.75em;
  transition: transform var(--duration-instant);
}

.announcement-banner__link:hover i {
  transform: translateX(2px);
}

/* === LLM PROXY SECTION === */
.llm-proxy {
  padding: var(--space-24) 0;
  background: var(--ink-900);
  color: var(--white);
}

.llm-proxy .section-header__title {
  color: var(--white);
}

.llm-proxy .section-header__subtitle {
  color: var(--silver-400);
}

.llm-proxy__content {
  display: flex;
  flex-direction: column;
  gap: var(--space-12);
}

.llm-proxy__features {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: var(--space-6);
}

.llm-proxy .feature-card {
  background: var(--ink-700);
  border: 1px solid var(--ink-500);
}

.llm-proxy .feature-card__title {
  color: var(--white);
}

.llm-proxy .feature-card__description {
  color: var(--silver-400);
}

.llm-proxy .feature-card__list li {
  color: var(--silver-200);
}

.llm-proxy .feature-card--highlight {
  background: linear-gradient(135deg, var(--ink-700) 0%, var(--ink-900) 100%);
  border-color: var(--silver-500);
}

.llm-proxy__demo {
  max-width: 700px;
  margin: 0 auto;
}

.llm-proxy__cta {
  display: flex;
  justify-content: center;
  gap: var(--space-4);
  flex-wrap: wrap;
}

.llm-proxy__cta .btn-tile {
  background: var(--ink-700);
  border-color: var(--ink-500);
}

.llm-proxy__cta .btn-tile:hover {
  background: var(--ink-500);
}

.llm-proxy__cta .btn-tile--primary {
  background: var(--white);
  color: var(--ink-900);
  border-color: var(--white);
}

.llm-proxy__cta .btn-tile--primary:hover {
  background: var(--silver-200);
}

@media (max-width: 48em) {
  .llm-proxy__features {
    grid-template-columns: 1fr;
  }
}