/* ═══ DESIGN TOKENS ═══ */
:root {
  /* Type */
  --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);

  /* Spacing */
  --space-1: 0.25rem;
  --space-2: 0.5rem;
  --space-3: 0.75rem;
  --space-4: 1rem;
  --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;

  /* Fonts */
  --font-body: 'Switzer', 'Helvetica Neue', Helvetica, Arial, sans-serif;
  --font-display: 'Switzer', 'Helvetica Neue', Helvetica, Arial, sans-serif;

  /* Transitions */
  --transition-interactive: 180ms cubic-bezier(0.16, 1, 0.3, 1);

  /* Radius */
  --radius-sm: 0.25rem;
}

/* ═══ LIGHT MODE (DEFAULT) ═══ */
:root,
[data-theme="light"] {
  --color-bg: #F5F4F0;
  --color-surface: #FFFFFF;
  --color-border: #D8D6D0;
  --color-text: #111111;
  --color-text-muted: #666660;
  --color-text-faint: #ADABA5;
  --color-text-inverse: #F5F4F0;
  --color-accent: #111111;
}

/* ═══ DARK MODE ═══ */
[data-theme="dark"] {
  --color-bg: #0E0E0D;
  --color-surface: #1A1918;
  --color-border: #2E2D2B;
  --color-text: #E0DFDC;
  --color-text-muted: #8A8985;
  --color-text-faint: #555552;
  --color-text-inverse: #0E0E0D;
  --color-accent: #E0DFDC;
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme]) {
    --color-bg: #0E0E0D;
    --color-surface: #1A1918;
    --color-border: #2E2D2B;
    --color-text: #E0DFDC;
    --color-text-muted: #8A8985;
    --color-text-faint: #555552;
    --color-text-inverse: #0E0E0D;
    --color-accent: #E0DFDC;
  }
}

/* ═══ RESET / 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: var(--space-16);
}

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);
}

img, svg { display: block; max-width: 100%; height: auto; }
button { cursor: pointer; background: none; border: none; font: inherit; color: inherit; }
a { color: inherit; text-decoration: none; }

a, button {
  transition: color var(--transition-interactive),
              opacity var(--transition-interactive);
}

::selection {
  background: rgba(17, 17, 17, 0.12);
  color: var(--color-text);
}
[data-theme="dark"] ::selection {
  background: rgba(224, 223, 220, 0.15);
}

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

.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;
}

/* ═══ HEADER ═══ */
.header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: color-mix(in srgb, var(--color-bg) 90%, transparent);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--color-border);
}

.header-inner {
  max-width: 1200px;
  margin: 0 auto;
  padding: var(--space-4) var(--space-6);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.logo {
  display: flex;
  align-items: center;
  gap: var(--space-3);
}

.logo-mark { color: var(--color-text); }

.logo-text {
  font-family: var(--font-display);
  font-size: var(--text-sm);
  font-weight: 700;
  letter-spacing: 3px;
  color: var(--color-text);
}

.nav {
  display: flex;
  align-items: center;
  gap: var(--space-6);
}

.nav-link {
  font-size: var(--text-xs);
  font-weight: 500;
  letter-spacing: 2px;
  text-transform: uppercase;
  color: var(--color-text-muted);
}

.nav-link:hover { color: var(--color-text); }

.theme-toggle {
  color: var(--color-text-muted);
  padding: var(--space-1);
  display: flex;
  align-items: center;
}
.theme-toggle:hover { color: var(--color-text); }

/* ═══ HERO ═══ */
.hero {
  padding: clamp(var(--space-24), 12vw, var(--space-32)) var(--space-6);
  padding-top: clamp(var(--space-16), 8vw, var(--space-24));
  border-bottom: 1px solid var(--color-border);
}

.hero-inner {
  max-width: 1200px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: var(--space-8);
}

.hero-mark {
  color: var(--color-text);
  opacity: 0.15;
}

.hero-heading {
  font-family: var(--font-display);
  font-size: var(--text-3xl);
  font-weight: 700;
  letter-spacing: -0.02em;
  line-height: 1.05;
  color: var(--color-text);
  max-width: 14ch;
}

.hero-sub {
  font-size: var(--text-base);
  font-weight: 400;
  color: var(--color-text-muted);
  max-width: 52ch;
  line-height: 1.65;
}

.hero-meta {
  display: flex;
  align-items: center;
  gap: var(--space-4);
  padding-top: var(--space-4);
}

.hero-tag {
  font-size: var(--text-xs);
  font-weight: 500;
  letter-spacing: 2.5px;
  color: var(--color-text-faint);
}

.hero-divider {
  width: 24px;
  height: 1px;
  background: var(--color-border);
}

/* ═══ STORY ═══ */
.story {
  padding: clamp(var(--space-16), 8vw, var(--space-24)) var(--space-6);
  border-bottom: 1px solid var(--color-border);
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.7s ease, transform 0.7s ease;
}
.story.visible {
  opacity: 1;
  transform: translateY(0);
}

.story-inner {
  max-width: 1200px;
  margin: 0 auto;
}

.story-label,
.approach-label {
  font-size: var(--text-xs);
  font-weight: 600;
  letter-spacing: 3px;
  text-transform: uppercase;
  color: var(--color-text-faint);
  margin-bottom: var(--space-10);
}

.story-grid {
  display: grid;
  grid-template-columns: 2fr 1fr;
  gap: var(--space-16);
}

.story-heading {
  font-family: var(--font-display);
  font-size: var(--text-xl);
  font-weight: 700;
  letter-spacing: -0.01em;
  margin-bottom: var(--space-6);
  color: var(--color-text);
}

.story-body {
  font-size: var(--text-base);
  color: var(--color-text-muted);
  max-width: 58ch;
  line-height: 1.7;
  margin-bottom: var(--space-4);
}

.story-aside {
  display: flex;
  flex-direction: column;
  gap: var(--space-6);
  padding-top: var(--space-2);
}

.story-stat {
  display: flex;
  flex-direction: column;
  gap: var(--space-1);
}

.stat-label {
  font-size: var(--text-xs);
  font-weight: 600;
  letter-spacing: 2px;
  text-transform: uppercase;
  color: var(--color-text-faint);
}

.stat-value {
  font-size: var(--text-sm);
  font-weight: 500;
  color: var(--color-text);
}

/* ═══ APPROACH ═══ */
.approach {
  padding: clamp(var(--space-16), 8vw, var(--space-24)) var(--space-6);
  border-bottom: 1px solid var(--color-border);
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.7s ease, transform 0.7s ease;
}
.approach.visible {
  opacity: 1;
  transform: translateY(0);
}

.approach-inner {
  max-width: 1200px;
  margin: 0 auto;
}

.approach-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-8);
}

.approach-card {
  padding: var(--space-8) 0;
  border-top: 1px solid var(--color-border);
  opacity: 0;
  transform: translateY(16px);
  transition: opacity 0.6s ease, transform 0.6s ease;
  transition-delay: 0.1s;
}
.approach-card:nth-child(2) { transition-delay: 0.2s; }
.approach-card:nth-child(3) { transition-delay: 0.3s; }
.approach-card.visible {
  opacity: 1;
  transform: translateY(0);
}

.approach-num {
  font-size: var(--text-xs);
  font-weight: 500;
  letter-spacing: 1px;
  color: var(--color-text-faint);
  margin-bottom: var(--space-4);
}

.approach-title {
  font-family: var(--font-display);
  font-size: var(--text-lg);
  font-weight: 600;
  margin-bottom: var(--space-3);
  color: var(--color-text);
}

.approach-desc {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  line-height: 1.65;
  max-width: 36ch;
}

/* ═══ FOOTER ═══ */
.footer {
  padding: clamp(var(--space-12), 6vw, var(--space-20)) var(--space-6);
  background: var(--color-surface);
}

.footer-inner {
  max-width: 1200px;
  margin: 0 auto;
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr;
  gap: var(--space-8);
  margin-bottom: var(--space-12);
}

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

.footer-mark { color: var(--color-text); }

.footer-company {
  font-size: var(--text-sm);
  font-weight: 500;
  color: var(--color-text);
}

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

.footer-label {
  font-size: var(--text-xs);
  font-weight: 600;
  letter-spacing: 2px;
  text-transform: uppercase;
  color: var(--color-text-faint);
  margin-bottom: var(--space-2);
}

.footer-email {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  border-bottom: 1px solid var(--color-border);
  padding-bottom: 2px;
}
.footer-email:hover {
  color: var(--color-text);
  border-color: var(--color-text);
}

.footer-bottom {
  padding-top: var(--space-8);
  border-top: 1px solid var(--color-border);
}

.footer-copy {
  font-size: var(--text-xs);
  color: var(--color-text-faint);
}

/* ═══ RESPONSIVE ═══ */
@media (max-width: 768px) {
  .header-inner {
    padding: var(--space-3) var(--space-4);
  }

  .nav {
    gap: var(--space-4);
  }

  .nav-link {
    font-size: 0.7rem;
    letter-spacing: 1.5px;
  }

  .logo-text {
    font-size: 0.75rem;
    letter-spacing: 2px;
  }

  .logo-mark {
    width: 22px;
    height: 22px;
  }

  .hero {
    padding: var(--space-12) var(--space-4) var(--space-16);
  }

  .hero-mark svg {
    width: 72px;
    height: 72px;
  }

  .hero-heading {
    font-size: clamp(2rem, 1rem + 5vw, 3rem);
  }

  .hero-sub {
    font-size: var(--text-sm);
  }

  .story,
  .approach {
    padding: var(--space-12) var(--space-4);
  }

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

  .approach-grid {
    grid-template-columns: 1fr;
    gap: 0;
  }

  .approach-card {
    padding: var(--space-6) 0;
  }

  .approach-desc {
    max-width: none;
  }

  .footer {
    padding: var(--space-10) var(--space-4);
  }

  .footer-grid {
    grid-template-columns: 1fr;
    gap: var(--space-8);
  }


}

/* ═══ REDUCED MOTION ═══ */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
  .story, .approach, .approach-card {
    opacity: 1;
    transform: none;
  }
}