/* =================================================================
   GLOBAL.CSS
   Shared design tokens, typography, base styles.
   Used by index.html and all four destination pages.
   ================================================================= */

/* ---------- Design tokens ---------- */
:root {
  /* Paper / ink palette (shared across all pages) */
  --paper:        #FAF6EF;
  --paper-warm:   #F2EBDD;
  --paper-edge:   #E6DDC8;
  --ink:          #1A1A1A;
  --ink-soft:     #3A3A38;
  --ink-muted:    #6B6A64;
  --ink-faint:    #A8A49A;
  --rule:         #2C2A26;

  /* Type families */
  --font-serif:  "Fraunces", "Newsreader", "Times New Roman", serif;
  --font-sans:   "Inter", system-ui, -apple-system, sans-serif;
  --font-script: "Caveat", "Brush Script MT", cursive;
  --font-mono:   "JetBrains Mono", "IBM Plex Mono", ui-monospace, monospace;

  /* Type scale (fluid) */
  --fs-hero:     clamp(72px, 14vw, 200px);
  --fs-display:  clamp(56px, 9vw, 128px);
  --fs-h1:       clamp(42px, 6vw, 88px);
  --fs-h2:       clamp(28px, 3.6vw, 48px);
  --fs-h3:       clamp(22px, 2.4vw, 32px);
  --fs-lede:     clamp(20px, 2vw, 28px);
  --fs-body:     17px;
  --fs-small:    14px;
  --fs-eyebrow:  11px;

  /* Spacing scale */
  --sp-1:  4px;
  --sp-2:  8px;
  --sp-3:  16px;
  --sp-4:  24px;
  --sp-5:  40px;
  --sp-6:  64px;
  --sp-7:  96px;
  --sp-8:  144px;
  --sp-9:  200px;

  /* Layout */
  --gutter:       clamp(20px, 5vw, 80px);
  --max-width:    1400px;
  --column-text:  62ch;

  /* Effects */
  --shadow-card:    0 1px 2px rgba(28, 24, 18, 0.04),
                    0 8px 24px -8px rgba(28, 24, 18, 0.18);
  --shadow-lift:    0 4px 12px rgba(28, 24, 18, 0.08),
                    0 24px 60px -16px rgba(28, 24, 18, 0.22);
  --shadow-stamp:   0 1px 1px rgba(28, 24, 18, 0.06),
                    0 6px 18px -6px rgba(28, 24, 18, 0.18);

  --ease-out:   cubic-bezier(0.22, 1, 0.36, 1);
  --ease-in:    cubic-bezier(0.55, 0, 1, 0.45);
}

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

html {
  -webkit-text-size-adjust: 100%;
  scroll-behavior: auto; /* Lenis handles smoothing */
}

body {
  background-color: var(--paper);
  color: var(--ink);
  font-family: var(--font-sans);
  font-size: var(--fs-body);
  line-height: 1.55;
  font-weight: 400;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
  overflow-x: hidden;
  min-height: 100vh;
  position: relative;
}

/* Paper texture — subtle film of noise + warm gradient cast */
body::before {
  content: "";
  position: fixed;
  inset: 0;
  pointer-events: none;
  background-image:
    radial-gradient(ellipse 80% 60% at 20% 10%, rgba(255, 240, 215, 0.45), transparent 60%),
    radial-gradient(ellipse 70% 70% at 90% 90%, rgba(220, 205, 175, 0.30), transparent 60%),
    url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' width='220' height='220'><filter id='n'><feTurbulence type='fractalNoise' baseFrequency='0.85' numOctaves='2' seed='3'/><feColorMatrix values='0 0 0 0 0.2  0 0 0 0 0.18  0 0 0 0 0.14  0 0 0 0.18 0'/></filter><rect width='100%25' height='100%25' filter='url(%23n)' opacity='0.6'/></svg>");
  background-blend-mode: multiply;
  opacity: 0.6;
  z-index: 1;
  mix-blend-mode: multiply;
}

/* All app content sits above the paper texture */
main,
header,
footer,
.preloader,
.page-transition-overlay,
.custom-cursor,
.monogram,
.back-link {
  position: relative;
  z-index: 2;
}

img, svg { display: block; max-width: 100%; }
a { color: inherit; text-decoration: none; }
button { font: inherit; color: inherit; background: none; border: 0; cursor: pointer; }

/* ---------- Typography defaults ---------- */
h1, h2, h3, h4, h5 {
  font-family: var(--font-serif);
  font-weight: 380;
  letter-spacing: -0.02em;
  line-height: 1.02;
  text-wrap: balance;
  color: var(--ink);
}

p { text-wrap: pretty; }

::selection {
  background: var(--ink);
  color: var(--paper);
}

/* ---------- Utility patterns ---------- */
.eyebrow {
  font-family: var(--font-sans);
  font-size: var(--fs-eyebrow);
  font-weight: 500;
  letter-spacing: 0.32em;
  text-transform: uppercase;
  color: var(--ink-muted);
}

.script {
  font-family: var(--font-script);
  font-weight: 400;
  letter-spacing: 0;
  line-height: 1.05;
}

.mono {
  font-family: var(--font-mono);
  letter-spacing: 0;
}

.rule {
  display: block;
  height: 1px;
  background: var(--rule);
  opacity: 0.7;
  border: 0;
}

/* ---------- Top-left monogram ---------- */
.monogram {
  position: fixed;
  top: clamp(20px, 3vw, 32px);
  left: clamp(20px, 3vw, 36px);
  z-index: 30;
  font-family: var(--font-serif);
  font-size: 18px;
  font-weight: 400;
  letter-spacing: 0.18em;
  color: var(--ink);
  mix-blend-mode: multiply;
}
.monogram__amp {
  font-family: var(--font-serif);
  font-style: italic;
  font-weight: 300;
  padding: 0 4px;
  opacity: 0.7;
}

/* ---------- Back link (destination pages) ---------- */
.back-link {
  position: fixed;
  top: clamp(20px, 3vw, 32px);
  right: clamp(20px, 3vw, 36px);
  z-index: 30;
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-family: var(--font-sans);
  font-size: 11px;
  font-weight: 500;
  letter-spacing: 0.28em;
  text-transform: uppercase;
  color: var(--ink);
  mix-blend-mode: multiply;
  transition: opacity 0.3s var(--ease-out);
}
.back-link:hover { opacity: 0.55; }
.back-link__arrow { width: 22px; height: 1px; background: currentColor; position: relative; }
.back-link__arrow::before {
  content: "";
  position: absolute;
  left: 0; top: 50%;
  width: 8px; height: 1px;
  background: currentColor;
  transform-origin: left center;
  transform: rotate(-35deg) translateY(-0.5px);
}
.back-link__arrow::after {
  content: "";
  position: absolute;
  left: 0; top: 50%;
  width: 8px; height: 1px;
  background: currentColor;
  transform-origin: left center;
  transform: rotate(35deg) translateY(-0.5px);
}

/* ---------- Page transition overlay ---------- */
.page-transition-overlay {
  position: fixed;
  inset: 0;
  z-index: 100;
  background-color: var(--ink);
  transform: translateY(101%);
  pointer-events: none;
  visibility: hidden;
  display: flex;
  align-items: center;
  justify-content: center;
}
.page-transition-overlay.is-active,
.page-transition-overlay.is-out,
.page-transition-overlay.is-in {
  visibility: visible;
}

.page-transition-overlay.is-out {
  animation: pt-sweep-out 700ms var(--ease-out) forwards;
}

.page-transition-overlay.is-in {
  transform: translateY(0);
  animation: pt-sweep-in 700ms var(--ease-out) forwards;
}

.page-transition-overlay__label {
  font-family: var(--font-serif);
  font-weight: 360;
  font-size: clamp(48px, 8vw, 112px);
  color: #fff;
  letter-spacing: -0.02em;
  opacity: 0;
  transform: translateY(20px);
  animation: pt-label 700ms var(--ease-out) forwards;
}

@keyframes pt-sweep-out {
  0%   { transform: translateY(101%); }
  100% { transform: translateY(0); }
}
@keyframes pt-sweep-in {
  0%   { transform: translateY(0); }
  100% { transform: translateY(-101%); }
}
@keyframes pt-label {
  0%   { opacity: 0; transform: translateY(20px); }
  35%  { opacity: 1; transform: translateY(0); }
  75%  { opacity: 1; transform: translateY(0); }
  100% { opacity: 0; transform: translateY(-12px); }
}

/* ---------- Preloader ---------- */
.preloader {
  position: fixed;
  inset: 0;
  z-index: 200;
  background-color: var(--paper);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 24px;
  transition: opacity 0.6s var(--ease-out);
}
.preloader.is-hidden {
  opacity: 0;
  pointer-events: none;
}
.preloader__label {
  font-family: var(--font-script);
  font-size: clamp(32px, 5vw, 48px);
  color: var(--ink);
  opacity: 0;
  transform: translateY(8px);
  animation: prel-in 600ms var(--ease-out) 80ms forwards;
}
.preloader__bar {
  position: relative;
  width: 240px;
  height: 1px;
  background: rgba(26, 26, 26, 0.18);
  overflow: hidden;
}
.preloader__bar-fill {
  position: absolute;
  inset: 0;
  width: 0;
  background: var(--ink);
  transition: width 0.4s var(--ease-out);
}
@keyframes prel-in {
  to { opacity: 1; transform: translateY(0); }
}

/* ---------- Custom cursor (desktop only) ---------- */
.custom-cursor {
  position: fixed;
  top: 0;
  left: 0;
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background-color: var(--ink);
  pointer-events: none;
  z-index: 999;
  transform: translate(-50%, -50%);
  transition: width 0.3s var(--ease-out),
              height 0.3s var(--ease-out),
              background-color 0.3s var(--ease-out),
              mix-blend-mode 0.3s var(--ease-out);
  mix-blend-mode: difference;
  background-color: #fff; /* difference blend reads as ink-on-paper */
}
.custom-cursor.is-hover {
  width: 44px;
  height: 44px;
}
@media (hover: none), (pointer: coarse) {
  .custom-cursor { display: none; }
  body { cursor: auto; }
}

/* ---------- Animate primitives (initial states) ----------
   GSAP/animations.js reads data-animate and animates FROM these states.
   When reduced-motion is on, animations.js leaves elements visible. */
[data-animate] { will-change: transform, opacity; }

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.001ms !important;
    scroll-behavior: auto !important;
  }
}

/* ---------- Page footer (used on detail pages) ---------- */
.page-footer {
  padding: var(--sp-7) var(--gutter) var(--sp-6);
  text-align: center;
  position: relative;
  z-index: 2;
}
.page-footer__signoff {
  font-family: var(--font-script);
  font-size: clamp(28px, 3.6vw, 44px);
  color: var(--ink);
  margin-bottom: 12px;
}
.page-footer__line {
  font-family: var(--font-sans);
  font-size: 13px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--ink-muted);
}