/* ============================================================
   TESS Studio — base.css
   Design tokens, reset, typography, buttons, utilities.
   Palette: black + cyan + white only. Gold is a 3-use accent.
   ============================================================ */

:root {
  /* core surfaces */
  --black: #000000;
  --ink: #0b0d0e;
  --ink-line: #1f2426;
  --ink-muted: #494544;
  --white: #ffffff;
  --off-white: #f6f8f9;
  --grey-line: #e3e8ea;
  --grey-text: #5a6468;
  --grey-text-dark: #8b9598;

  /* cyan ramp */
  --cyan: #29a9e0;
  --cyan-bright: #4fd2ff;
  --cyan-ink: #0e6e9b;
  --cyan-100: #cfedfa;
  --cyan-050: #eaf7fd;

  /* rationed accent — footer hairline only */
  --gold: #d6b981;

  /* type scale */
  --fs-hero: clamp(2.75rem, 9vw, 7rem);
  --fs-h2: clamp(2rem, 5vw, 3.5rem);
  --fs-h3: clamp(1.25rem, 2.2vw, 1.6rem);
  --fs-body: clamp(1rem, 0.95rem + 0.25vw, 1.125rem);
  --fs-small: 0.875rem;
  --fs-eyebrow: 0.75rem;

  /* spacing (8px scale) */
  --sp-1: 4px;
  --sp-2: 8px;
  --sp-3: 12px;
  --sp-4: 16px;
  --sp-6: 24px;
  --sp-8: 32px;
  --sp-12: 48px;
  --sp-16: 64px;
  --sp-24: 96px;
  --sp-32: 128px;
  --space-section: clamp(72px, 10vw, 140px);
  --content-max: 1120px;
  --gutter: clamp(20px, 5vw, 48px);

  /* radius */
  --radius-card: 18px;
  --radius-media: 14px;
  --radius-pill: 999px;
  --radius-sharp: 0;

  /* shadow */
  --shadow-pop: 6px 6px 0 var(--black);
  --shadow-pop-sm: 4px 4px 0 var(--black);
  --shadow-soft: 0 24px 60px rgba(0, 0, 0, 0.35);
  --glow-cyan: 0 0 0 1px var(--cyan), 0 0 24px -6px rgba(41, 169, 224, 0.55);

  /* motion */
  --ease-out: cubic-bezier(0.22, 1, 0.36, 1);
  --dur-hover: 180ms;
  --dur-reveal: 600ms;
  --dur-hero: 900ms;
}

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

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

body {
  margin: 0;
  background: var(--off-white);
  color: var(--black);
  font-family: "Inter", system-ui, -apple-system, sans-serif;
  font-size: var(--fs-body);
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
}

img,
svg {
  max-width: 100%;
  display: block;
}

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

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

ul {
  margin: 0;
  padding: 0;
  list-style: none;
}

h1,
h2,
h3,
p {
  margin: 0;
}

h1,
h2,
h3 {
  font-family: "Bricolage Grotesque", "Inter", system-ui, sans-serif;
  font-weight: 800;
  letter-spacing: -0.03em;
  line-height: 0.98;
}

h2 {
  font-size: var(--fs-h2);
  letter-spacing: -0.02em;
}

h3 {
  font-size: var(--fs-h3);
  font-weight: 700;
  letter-spacing: -0.01em;
}

:focus-visible {
  outline: 3px solid var(--cyan);
  outline-offset: 3px;
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }
  *,
  *::before,
  *::after {
    animation: none !important;
    transition-duration: 1ms !important;
    scroll-behavior: auto !important;
  }
}

/* ---------------- layout utilities ---------------- */

.section-inner {
  max-width: var(--content-max);
  margin: 0 auto;
  padding: 0 var(--gutter);
}

.section-pad {
  padding-block: var(--space-section);
}

.eyebrow {
  font-family: "Inter", sans-serif;
  font-size: var(--fs-eyebrow);
  font-weight: 600;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--cyan-ink);
}

.on-dark .eyebrow {
  color: var(--cyan);
}

.section-head {
  max-width: 640px;
  margin-bottom: var(--sp-12);
}

.section-head h2 {
  margin-top: var(--sp-2);
}

.section-sub {
  margin-top: var(--sp-3);
  color: var(--grey-text);
  font-size: 1.05rem;
}

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

.on-dark .section-sub {
  color: #c7ced0;
}

/* ---------------- buttons ---------------- */

.btn {
  position: relative;
  display: inline-flex;
  align-items: center;
  gap: var(--sp-2);
  padding: 15px 28px;
  border-radius: var(--radius-pill);
  font-weight: 800;
  font-size: 0.95rem;
  letter-spacing: -0.01em;
  white-space: nowrap;
  overflow: hidden;
  transition: transform var(--dur-hover) var(--ease-out), box-shadow var(--dur-hover) var(--ease-out);
  border: 2px solid var(--black);
}

.btn::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(115deg, transparent 30%, rgba(255, 255, 255, 0.55) 48%, transparent 66%);
  transform: translateX(-130%);
  transition: transform 550ms var(--ease-out);
  pointer-events: none;
}

.btn:hover::after {
  transform: translateX(130%);
}

.btn:active {
  transform: scale(0.96) !important;
}

.btn svg {
  width: 20px;
  height: 20px;
  flex: none;
  transition: transform var(--dur-hover) var(--ease-out);
}

.btn:hover svg {
  transform: translateX(3px) rotate(-4deg);
}

.btn-primary {
  background: var(--cyan);
  color: var(--black);
  border-color: var(--black);
  box-shadow: var(--shadow-pop);
}

.btn-primary:hover {
  transform: translate(-2px, -2px);
  box-shadow: 8px 8px 0 var(--black);
}

.on-dark .btn-primary {
  border-color: var(--cyan);
  box-shadow: none;
}

.on-dark .btn-primary:hover {
  box-shadow: var(--glow-cyan);
  transform: translate(0, -2px);
}

.btn-ghost {
  background: transparent;
  color: var(--black);
  border-color: var(--black);
}

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

.on-dark .btn-ghost {
  color: var(--white);
  border-color: var(--grey-text-dark);
}

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

.btn-xl {
  padding: 19px 36px;
  font-size: 1.05rem;
}

.btn-icon {
  width: 48px;
  height: 48px;
  padding: 0;
  justify-content: center;
  border-radius: var(--radius-pill);
}

.btn-icon svg {
  width: 22px;
  height: 22px;
}

.btn-row {
  display: flex;
  flex-wrap: wrap;
  gap: var(--sp-4);
}

.text-link {
  display: inline-flex;
  align-items: center;
  gap: var(--sp-2);
  font-weight: 700;
  color: var(--cyan-ink);
  border-bottom: 2px solid var(--cyan-ink);
  padding-bottom: 2px;
  transition: gap var(--dur-hover) var(--ease-out), color var(--dur-hover) var(--ease-out);
}

.text-link svg {
  transition: transform var(--dur-hover) var(--ease-out);
}

.text-link:hover {
  gap: var(--sp-3);
}

.text-link:hover svg {
  transform: translateX(4px);
}

.on-dark .text-link {
  color: var(--cyan);
  border-color: var(--cyan);
}

/* ---------------- scroll progress + reveal ---------------- */

#progress-bar {
  position: fixed;
  top: 0;
  left: 0;
  height: 3px;
  width: 0%;
  background: var(--cyan);
  z-index: 999;
  transition: width 80ms linear;
}

[data-reveal] {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity var(--dur-reveal) var(--ease-out), transform var(--dur-reveal) var(--ease-out);
}

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

.gsap-active [data-reveal] {
  transition: none;
}

.skip-link {
  position: absolute;
  left: -9999px;
  top: 0;
  background: var(--cyan);
  color: var(--black);
  padding: 12px 20px;
  font-weight: 700;
  z-index: 1000;
}

.skip-link:focus {
  left: var(--sp-4);
  top: var(--sp-4);
}

.badge-placeholder {
  position: absolute;
  top: 10px;
  right: 10px;
  font-size: 10px;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--cyan);
  border: 1px solid var(--cyan);
  border-radius: var(--radius-pill);
  padding: 3px 9px;
  background: rgba(0, 0, 0, 0.55);
  pointer-events: none;
}

.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  overflow: hidden;
  clip: rect(0 0 0 0);
  white-space: nowrap;
}