/* =========================================================
   DERADA — Reset + Base
   ========================================================= */

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

html, body, h1, h2, h3, h4, h5, h6,
p, figure, blockquote, dl, dd,
ul, ol, li, fieldset, legend {
  margin: 0;
  padding: 0;
}

html {
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
  scroll-behavior: auto; /* Lenis handles smoothing */
  -webkit-text-size-adjust: 100%;
  background: var(--color-bg);
  overscroll-behavior: none; /* kill the rubber-band white flash above dark heroes */
}

body {
  font-family: var(--font-body);
  font-size: var(--fs-body);
  line-height: var(--lh-base);
  letter-spacing: var(--tracking-normal);
  color: var(--color-ink);
  background: var(--color-bg);
  overflow-x: hidden;
  min-height: 100vh;
  overscroll-behavior: none;
}

body.no-scroll { overflow: hidden; }

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

img, video { object-fit: cover; }

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

button {
  font: inherit;
  color: inherit;
  background: none;
  border: none;
  cursor: pointer;
  padding: 0;
}

ul, ol { list-style: none; }

::selection {
  background: var(--color-accent);
  color: #fff;
}

/* ---------- TYPOGRAPHY UTILITIES ---------- */
.display-xl {
  font-family: var(--font-display);
  font-size: var(--fs-display-xl);
  line-height: var(--lh-tight);
  letter-spacing: var(--tracking-display);
  font-weight: 500;
}
.display-l {
  font-family: var(--font-display);
  font-size: var(--fs-display-l);
  line-height: var(--lh-tight);
  letter-spacing: var(--tracking-display);
  font-weight: 500;
}
.display-m {
  font-family: var(--font-display);
  font-size: var(--fs-display-m);
  line-height: var(--lh-snug);
  letter-spacing: var(--tracking-display);
  font-weight: 500;
}
.h1 { font-family: var(--font-display); font-size: var(--fs-h1); line-height: var(--lh-snug); letter-spacing: var(--tracking-tight); font-weight: 500; }
.h2 { font-family: var(--font-display); font-size: var(--fs-h2); line-height: var(--lh-snug); letter-spacing: var(--tracking-tight); font-weight: 500; }
.h3 { font-family: var(--font-display); font-size: var(--fs-h3); line-height: var(--lh-snug); letter-spacing: var(--tracking-normal); font-weight: 500; }

.body-l { font-size: var(--fs-body-l); line-height: var(--lh-loose); }
.body   { font-size: var(--fs-body);   line-height: var(--lh-base); }
.body-s { font-size: var(--fs-body-s); line-height: var(--lh-base); }

.eyebrow {
  font-size: var(--fs-eyebrow);
  letter-spacing: var(--tracking-eyebrow);
  text-transform: uppercase;
  font-weight: 500;
  color: var(--color-ink-mute);
}

.serif-italic {
  font-family: var(--font-serif);
  font-style: italic;
  font-weight: 300;
  letter-spacing: -0.01em;
}

.text-accent { color: var(--color-accent); }
.text-mute   { color: var(--color-ink-mute); }

/* ---------- LAYOUT ---------- */
.container {
  width: 100%;
  max-width: var(--container-max);
  margin-inline: auto;
  padding-inline: var(--gutter);
}

.section { padding-block: var(--section-py); position: relative; }
.section-l { padding-block: var(--section-py-l); position: relative; }

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

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

.grid {
  display: grid;
  grid-template-columns: repeat(var(--grid-cols), 1fr);
  gap: var(--grid-gap);
}

.hairline-top    { border-top: var(--hairline); }
.hairline-bottom { border-bottom: var(--hairline); }

/* ---------- BUTTONS / LINKS ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: var(--space-3);
  padding: var(--space-4) var(--space-6);
  border-radius: var(--radius-pill);
  font-size: var(--fs-body-s);
  letter-spacing: var(--tracking-wide);
  text-transform: uppercase;
  font-weight: 500;
  transition: background var(--dur-base) var(--ease-out-quart),
              color var(--dur-base) var(--ease-out-quart),
              transform var(--dur-base) var(--ease-out-quart);
  cursor: pointer;
  will-change: transform;
}
.btn-primary {
  background: var(--color-ink);
  color: var(--color-bg);
}
.btn-primary:hover {
  background: var(--color-accent);
  transform: translateY(-1px);
}
.btn-outline {
  background: transparent;
  color: var(--color-ink);
  box-shadow: inset 0 0 0 1px var(--color-line-strong);
}
.btn-outline:hover {
  background: var(--color-ink);
  color: var(--color-bg);
}
.btn .arrow {
  display: inline-block;
  transition: transform var(--dur-base) var(--ease-out-quart);
}
.btn:hover .arrow { transform: translateX(4px); }

/* underline link with reveal */
.link-underline {
  position: relative;
  display: inline-block;
  padding-bottom: 2px;
}
.link-underline::after {
  content: '';
  position: absolute;
  left: 0; right: 0; bottom: 0;
  height: 1px;
  background: currentColor;
  transform-origin: right center;
  transform: scaleX(1);
  transition: transform var(--dur-slow) var(--ease-out-expo);
}
.link-underline:hover::after {
  transform-origin: left center;
  transform: scaleX(0);
  animation: link-reveal 700ms var(--ease-out-expo) forwards;
}
@keyframes link-reveal {
  0%   { transform-origin: right center; transform: scaleX(1); }
  50%  { transform-origin: right center; transform: scaleX(0); }
  51%  { transform-origin: left center;  transform: scaleX(0); }
  100% { transform-origin: left center;  transform: scaleX(1); }
}

/* ---------- REVEAL HELPERS (used by GSAP) ----------
   Note: initial hidden states are set by GSAP, not CSS. If JS fails
   to load, content remains visible (graceful degradation). */
[data-reveal-line] {
  display: inline-block;
  overflow: hidden;
}
[data-reveal-line] > span {
  display: inline-block;
  will-change: transform;
}

[data-parallax] { will-change: transform; }

/* image mask used for reveal-on-scroll */
.media-mask {
  position: relative;
  overflow: hidden;
  background: var(--color-bg-soft);
}
.media-mask > img,
.media-mask > video {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transform: scale(1.08);
  transition: transform 1200ms var(--ease-out-quart);
}
.media-mask::after {
  content: '';
  position: absolute; inset: 0;
  background: var(--color-bg);
  transform-origin: bottom center;
  transform: scaleY(1);
  pointer-events: none;
}
.media-mask.is-revealed > img,
.media-mask.is-revealed > video {
  transform: scale(1);
}
.media-mask.is-revealed::after {
  transform: scaleY(0);
  transition: transform 1200ms var(--ease-out-expo);
}

/* skip-to-content for a11y */
.skip-link {
  position: absolute;
  top: -40px;
  left: 8px;
  background: var(--color-ink);
  color: var(--color-bg);
  padding: 8px 12px;
  border-radius: var(--radius-s);
  z-index: var(--z-modal);
}
.skip-link:focus { top: 8px; }