/* ============================================================
   CARBON BASED — Base / Reset
   ============================================================ */

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

html {
  font-size: 16px;
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  background-color: var(--cb-white);
  color: var(--cb-black);
  font-family: var(--font-sans);
  font-weight: 300;
  line-height: 1.6;
  overflow-x: hidden;
}

body.dark {
  background-color: var(--cb-black);
  color: var(--cb-white);
}

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

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

ul, ol {
  list-style: none;
}

button {
  cursor: pointer;
  border: none;
  background: none;
  font-family: var(--font-sans);
}

/* ============================================================
   Typography Scale
   ============================================================ */

.t-display {
  font-family: var(--font-serif);
  font-size: clamp(48px, 8vw, 96px);
  font-weight: 300;
  line-height: 0.95;
  letter-spacing: 0.01em;
}

.t-display-italic {
  font-family: var(--font-serif);
  font-size: clamp(48px, 8vw, 96px);
  font-weight: 300;
  font-style: italic;
  line-height: 0.95;
  letter-spacing: 0.01em;
}

.t-headline {
  font-family: var(--font-serif);
  font-size: clamp(32px, 4vw, 52px);
  font-weight: 300;
  line-height: 1.05;
  letter-spacing: 0.02em;
}

.t-subhead {
  font-family: var(--font-serif);
  font-size: clamp(22px, 2.5vw, 32px);
  font-weight: 300;
  line-height: 1.15;
  letter-spacing: 0.03em;
}

.t-body {
  font-size: 13px;
  font-weight: 300;
  line-height: 1.85;
  color: var(--cb-muted);
}

.t-label {
  font-family: var(--font-sans);
  font-size: 9px;
  font-weight: 300;
  letter-spacing: 0.28em;
  text-transform: uppercase;
}

.t-label-sm {
  font-family: var(--font-sans);
  font-size: 8px;
  font-weight: 200;
  letter-spacing: 0.22em;
  text-transform: uppercase;
}

.t-nav {
  font-family: var(--font-sans);
  font-size: 10px;
  font-weight: 300;
  letter-spacing: 0.16em;
  text-transform: uppercase;
}

.t-accent {
  color: var(--cb-accent);
}

.t-muted {
  color: var(--cb-mid);
}

.t-white {
  color: var(--cb-white);
}

/* ============================================================
   Layout Utilities
   ============================================================ */

.container {
  width: 100%;
  max-width: 1440px;
  margin: 0 auto;
  padding: 0 var(--space-md);
}

.container-narrow {
  max-width: 900px;
  margin: 0 auto;
  padding: 0 var(--space-md);
}

.section {
  padding: var(--space-xl) var(--space-md);
}

.section-dark {
  background-color: var(--cb-black);
  color: var(--cb-white);
}

.section-warm {
  background-color: var(--cb-warm);
  color: var(--cb-black);
}

.grid-2 {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 2px;
}

.grid-3 {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 2px;
}

.grid-4 {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 2px;
}

.flex-center {
  display: flex;
  align-items: center;
  justify-content: center;
}

.flex-between {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

/* ============================================================
   Buttons & CTAs
   ============================================================ */

.btn {
  display: inline-block;
  font-family: var(--font-sans);
  font-size: 9px;
  font-weight: 300;
  letter-spacing: 0.26em;
  text-transform: uppercase;
  padding: 14px 28px;
  border: 1px solid var(--cb-black);
  color: var(--cb-black);
  background: transparent;
  cursor: pointer;
  transition: background var(--transition-base), color var(--transition-base);
}

.btn:hover {
  background: var(--cb-black);
  color: var(--cb-white);
}

.btn-dark {
  border-color: var(--cb-white);
  color: var(--cb-white);
}

.btn-dark:hover {
  background: var(--cb-white);
  color: var(--cb-black);
}

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

.btn-accent:hover {
  background: var(--cb-accent);
  color: var(--cb-black);
}

.link-underline {
  display: inline-block;
  font-size: 9px;
  font-weight: 300;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  border-bottom: 1px solid currentColor;
  padding-bottom: 2px;
  opacity: 0.85;
  transition: opacity var(--transition-base);
}

.link-underline:hover {
  opacity: 1;
}

/* ============================================================
   Dividers
   ============================================================ */

.divider {
  width: 40px;
  height: 1px;
  background: var(--cb-accent);
  margin: var(--space-md) 0;
}

.divider-full {
  width: 100%;
  height: 1px;
  background: rgba(10, 10, 10, 0.1);
}

.divider-dark {
  background: rgba(248, 246, 242, 0.1);
}

/* ============================================================
   Animations
   ============================================================ */

@keyframes fadeUp {
  from { opacity: 0; transform: translateY(24px); }
  to   { opacity: 1; transform: translateY(0); }
}

@keyframes fadeIn {
  from { opacity: 0; }
  to   { opacity: 1; }
}

@keyframes marqueeScroll {
  from { transform: translateX(0); }
  to   { transform: translateX(-50%); }
}

.animate-fade-up {
  animation: fadeUp 0.8s ease forwards;
}

.animate-delay-1 { animation-delay: 0.1s; }
.animate-delay-2 { animation-delay: 0.25s; }
.animate-delay-3 { animation-delay: 0.4s; }
.animate-delay-4 { animation-delay: 0.6s; }

/* ============================================================
   Scroll Reveal (JS adds .is-visible)
   ============================================================ */

.reveal {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.7s ease, transform 0.7s ease;
}

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

/* ============================================================
   Responsive
   ============================================================ */

@media (max-width: 900px) {
  .grid-2, .grid-3, .grid-4 {
    grid-template-columns: 1fr;
  }
  .section {
    padding: var(--space-lg) var(--space-sm);
  }
}

@media (max-width: 600px) {
  .container, .container-narrow {
    padding: 0 var(--space-sm);
  }
}