/* ============================================================
   UPAYA TEASER — style.css
   Brand: visual_style_guide.md
   Impeccable register: brand (design IS the product)
   Color strategy: Committed — dark surface, red halation
   ============================================================ */

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

/* ── Design tokens ───────────────────────────────────────── */
:root {
  /* Brand palette — from visual_style_guide.md */
  --color-dark: #161111;
  --color-red-dark: #AA1F23;
  --color-red-vivid: #EE2324;
  --color-cream: #F5EBE0;
  --color-cream-dim: #DBCDBA;

  /* Fluid type scale */
  --text-xs: clamp(0.7rem, 1.5vw, 0.9rem);
  --text-sm: clamp(0.85rem, 2vw, 1.1rem);
  --text-base: clamp(1rem, 2.5vw, 1.5rem);
  --text-lg: clamp(1.2rem, 3vw, 2.2rem);
  --text-xl: clamp(2rem, 5vw, 5rem);
  --text-xxl: clamp(3rem, 10vw, 9rem);

  /* Fluid spacing */
  --space-xs: clamp(0.5rem, 1vw, 0.75rem);
  --space-sm: clamp(1rem, 2vw, 1.5rem);
  --space-md: clamp(2rem, 4vw, 3rem);
  --space-lg: clamp(3rem, 6vw, 6rem);
  --space-xl: clamp(6rem, 10vw, 12rem);

  /* Slide margins */
  --margin-x: clamp(1.5rem, 8vw, 8rem);
  --margin-y: clamp(2rem, 8vh, 8rem);

  /* Halation — from visual_style_guide §3 */
  --halation:
    0 0 6px rgba(245, 235, 224, 0.70),
    0 0 24px rgba(238, 35, 36, 0.60),
    0 0 55px rgba(170, 31, 35, 0.45),
    0 0 115px rgba(170, 31, 35, 0.28);

  /* Easing — Emil: strong custom curves, not built-ins */
  --ease-out: cubic-bezier(0.23, 1, 0.32, 1);
  /* Strong ease-out: enters fast, instant feedback */
  --ease-in-out: cubic-bezier(0.77, 0, 0.175, 1);
  /* On-screen movement: natural deceleration */
  --ease-drawer: cubic-bezier(0.32, 0.72, 0, 1);
  /* iOS-like: drawer / logo entrance */
}

/* ── Base ────────────────────────────────────────────────── */
html {
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  font-family: 'Playfair Display', Georgia, serif;
  background-color: var(--color-dark);
  color: var(--color-cream);
  min-height: 100dvh;
  overflow: hidden;
}

/* ── Stage (full-viewport wrapper) ──────────────────────── */
.stage {
  position: relative;
  width: 100%;
  height: 100dvh;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
}

/* ── Background texture (bg_cover.png per brand guide) ───── */
.bg-texture {
  position: absolute;
  inset: 0;
  background-image: url('upaya_style_kit/assets/bg_cover.png');
  background-size: cover;
  background-position: center;
  background-repeat: no-repeat;
  z-index: 0;

  opacity: 0;
  transition: opacity 1.5s var(--ease-in-out);
}

body.is-loaded .bg-texture {
  opacity: 1;
}

/* ── Overlay gradient for legibility ────────────────────── */
.overlay {
  position: absolute;
  inset: 0;
  background: radial-gradient(ellipse 120% 80% at 50% 55%,
      rgba(22, 17, 17, 0.15) 0%,
      rgba(22, 17, 17, 0.72) 55%,
      rgba(22, 17, 17, 0.95) 100%);
  z-index: 1;
}

/* ── Grain noise layer ───────────────────────────────────── */
/* Canvas-generated grain: JS draws random pixels at ~20fps.
   mix-blend-mode: overlay lifts grain on midtones, stays invisible
   on near-black — preserves the dark brand base without washing it out. */
.grain {
  position: absolute;
  inset: 0;
  mix-blend-mode: overlay;
  opacity: 0.65;
  z-index: 2;
  pointer-events: none;
  display: block;
  /* canvas is inline by default */
}

/* ── Content block (center stage) ───────────────────────── */
.content {
  position: relative;
  z-index: 10;
  text-align: center;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-md);
}

/* ── Eyebrow label ───────────────────────────────────────── */
.eyebrow {
  font-family: 'Playfair Display', serif;
  font-size: var(--text-xs);
  letter-spacing: 0.38em;
  text-transform: uppercase;
  font-weight: 500;
  color: var(--color-cream-dim);
  line-height: 1;

  opacity: 0;
  transform: translateY(10px);
  /* Stagger slot 1 — lightest element, enters first */
  transition:
    opacity 600ms var(--ease-out),
    transform 600ms var(--ease-out);
}

body.is-loaded .eyebrow {
  opacity: 0.75;
  transform: translateY(0);
  transition-delay: 300ms; /* Starts fading in after bg-texture starts */
}

/* ── Headline ────────────────────────────────────────────── */
.headline {
  font-size: var(--text-xxl);
  font-weight: 540;
  line-height: 0.95;
  letter-spacing: -0.03em;
  text-transform: uppercase;
  color: var(--color-cream);
  text-shadow: var(--halation);
  /* No max-width — it IS the page */

  opacity: 0;
  transform: translateY(22px);
  /* Stagger slot 2 — hero element, larger translateY for more drama */
  transition:
    opacity 900ms var(--ease-out),
    transform 900ms var(--ease-out);
}

body.is-loaded .headline {
  opacity: 1;
  transform: translateY(0);
  transition-delay: 400ms;
}

/* Italic "Soon" — slightly lighter weight for contrast */
.headline em {
  font-style: italic;
  font-weight: 400;
  /* Inherited halation carries the glow */
}

/* ── Contact block ───────────────────────────────────────── */
.contact-block {
  margin-top: var(--space-xs);

  opacity: 0;
  transform: translateY(8px);
  /* Stagger slot 3 — softest element, last to arrive */
  transition:
    opacity 700ms var(--ease-out),
    transform 700ms var(--ease-out);
}

body.is-loaded .contact-block {
  opacity: 1;
  transform: translateY(0);
  transition-delay: 540ms;
}

.contact-link {
  display: inline-block;
  font-family: 'Playfair Display', serif;
  font-size: var(--text-sm);
  letter-spacing: 0.22em;
  text-transform: lowercase;
  color: var(--color-cream-dim);
  text-decoration: none;
  opacity: 0.7;
  /* Emil: only GPU-accelerated props. letter-spacing is NOT GPU — removed.
     Hover is instant feedback → 180ms ease. Color uses ease (on-screen morph). */
  transition:
    opacity 180ms ease,
    color 180ms ease,
    text-shadow 250ms ease;
}

/* Emil: gate hover behind pointer-fine to avoid false mobile triggers */
@media (hover: hover) and (pointer: fine) {
  .contact-link:hover {
    opacity: 1;
    color: var(--color-cream);
    text-shadow:
      0 0 10px rgba(238, 35, 36, 0.28),
      0 0 35px rgba(170, 31, 35, 0.14);
  }
}

.contact-link:focus-visible {
  opacity: 1;
  color: var(--color-cream);
  outline: 2px solid var(--color-red-vivid);
  outline-offset: 6px;
  border-radius: 2px;
}

/* ── Logo (bottom-right, per brand guide §8) ────────────── */
/* Emil: drawer curve for the logo — arrives last, most permanent element */
.logo-container {
  position: absolute;
  bottom: var(--margin-y);
  right: var(--margin-x);
  width: clamp(90px, 10vw, 160px);
  z-index: 20;

  opacity: 0;
  transform: translateY(1.5rem);
  transition:
    opacity 900ms var(--ease-drawer),
    transform 900ms var(--ease-drawer);
}

body.is-loaded .logo-container {
  opacity: 1;
  transform: translateY(0);
  transition-delay: 740ms;
}

.logo {
  width: 100%;
  height: auto;
  mix-blend-mode: screen;
  /* Renders clean on dark backgrounds */
  display: block;
}

/* ── Bottom decorative bar ───────────────────────────────── */
/* Emil: transform-origin must live on the selector, not inside keyframes */
.bottom-bar {
  position: absolute;
  bottom: 0;
  left: var(--margin-x);
  right: calc(var(--margin-x) + clamp(90px, 10vw, 160px) + var(--space-md));
  height: 1px;
  background: linear-gradient(90deg,
      transparent 0%,
      rgba(170, 31, 35, 0.5) 20%,
      rgba(245, 235, 224, 0.15) 60%,
      transparent 100%);
  z-index: 15;
  transform-origin: left center;
  /* Fixed: not inside keyframes */

  opacity: 0;
  transform: scaleX(0.15);
  transition:
    opacity 800ms var(--ease-in-out),
    transform 800ms var(--ease-in-out);
}

body.is-loaded .bottom-bar {
  opacity: 1;
  transform: scaleX(1);
  transition-delay: 900ms;
}

/* ── Reduced motion ──────────────────────────────────────── */
/* Emil: reduced motion ≠ zero animation. Keep opacity (aids comprehension).
   Remove transform-based movement entirely. */
@media (prefers-reduced-motion: reduce) {

  .eyebrow,
  .headline,
  .contact-block,
  .logo-container,
  .bottom-bar {
    transform: none !important;
    /* Kill movement, keep opacity fade */
    transition-property: opacity;
    transition-duration: 400ms;
    transition-timing-function: ease;
  }

  .grain {
    animation: none;
  }

  .contact-link {
    /* Fast, GPU-only */
    transition: opacity 150ms ease, color 150ms ease;
  }
}

/* ── Responsive: mobile ──────────────────────────────────── */
@media (max-width: 600px) {
  body {
    overflow: hidden;
  }

  .stage {
    height: 100dvh;
    align-items: center;
    justify-content: center;
  }

  .content {
    gap: clamp(1rem, 3vw, 1.5rem);
    padding: 0 var(--margin-x);
    /* Nudge slightly above center for optical balance */
    margin-bottom: clamp(3rem, 8vh, 5rem);
  }

  .logo-container {
    width: clamp(72px, 22vw, 110px);
    bottom: var(--margin-y);
    right: var(--margin-x);
  }

  .bottom-bar {
    right: calc(var(--margin-x) + clamp(72px, 22vw, 110px) + 1rem);
  }
}

/* ── High-contrast mode support ─────────────────────────── */
@media (forced-colors: active) {
  .contact-link:focus-visible {
    outline: 2px solid ButtonText;
  }

  .headline {
    text-shadow: none;
  }
}