/* ==========================================================================
   masugomi.com -- v2
   cinematic / single-column / serif-classic / burnt-orange / card-flip /
   duotone-photo / crystalline / conversational
   ========================================================================== */

/* ---------- Tokens ---------- */
:root {
  --burnt-orange: #C04020;
  --warm-sienna: #E07A3C;
  --tungsten-cream: #F5E8D8;
  --deep-espresso: #2A1A14;
  --faded-ochre: #B89060;
  --pure-white: #FFFFFF;

  --font-display: "Playfair Display", Georgia, "Times New Roman", serif;
  --font-body: "Lora", Georgia, "Times New Roman", serif;

  --col-max: 720px;
  --col-narrow: 600px;

  --transition-slow: 900ms cubic-bezier(0.65, 0, 0.35, 1);
  --transition-medium: 600ms cubic-bezier(0.4, 0, 0.2, 1);
}

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

html {
  scroll-behavior: smooth;
  font-size: 16px;
}

body {
  background-color: var(--tungsten-cream);
  color: var(--deep-espresso);
  font-family: var(--font-body);
  font-weight: 400;
  font-size: clamp(17px, 1.2vw, 20px);
  line-height: 1.75;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
  position: relative;
  min-height: 100vh;
}

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

a {
  color: var(--burnt-orange);
  text-decoration: none;
  border-bottom: 1px solid currentColor;
  transition: color var(--transition-medium), border-color var(--transition-medium);
}

a:hover {
  color: var(--warm-sienna);
}

p + p {
  margin-top: 1.2em;
}

em,
i {
  font-style: italic;
}

/* ---------- Layout containers ---------- */
.container {
  max-width: var(--col-max);
  margin: 0 auto;
  padding: 0 32px;
  width: 100%;
}

.container-narrow {
  max-width: var(--col-narrow);
}

/* ==========================================================================
   Persistent overlays
   ========================================================================== */

/* Grain noise */
.grain-overlay {
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 9000;
  opacity: 0.045;
  mix-blend-mode: multiply;
  background-image: url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' width='240' height='240'><filter id='n'><feTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='2' stitchTiles='stitch'/><feColorMatrix values='0 0 0 0 0.16  0 0 0 0 0.10  0 0 0 0 0.08  0 0 0 0.9 0'/></filter><rect width='100%25' height='100%25' filter='url(%23n)'/></svg>");
  background-size: 240px 240px;
}

/* Vignette */
.vignette-overlay {
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 9001;
  background: radial-gradient(
    ellipse at center,
    rgba(42, 26, 20, 0) 35%,
    rgba(42, 26, 20, 0.18) 75%,
    rgba(42, 26, 20, 0.42) 100%
  );
}

/* ==========================================================================
   Crystalline background motif layer
   ========================================================================== */
.crystalline-layer {
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 1;
  overflow: hidden;
}

.crystal {
  position: absolute;
  opacity: 0.08;
  will-change: transform;
  transition: transform 200ms linear;
}

.crystal-1 {
  width: 240px;
  height: 240px;
  top: 12vh;
  left: -60px;
}

.crystal-2 {
  width: 320px;
  height: auto;
  top: 55vh;
  right: -90px;
}

.crystal-3 {
  width: 200px;
  height: auto;
  top: 110vh;
  left: 8vw;
}

.crystal-4 {
  width: 280px;
  height: auto;
  top: 180vh;
  right: 4vw;
}

.crystal-5 {
  width: 200px;
  height: auto;
  top: 250vh;
  left: -40px;
}

/* ==========================================================================
   HERO
   ========================================================================== */

.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
  z-index: 2;
}

.hero-backdrop {
  position: absolute;
  inset: 0;
  z-index: 0;
  background:
    radial-gradient(ellipse at 30% 30%, rgba(192, 64, 32, 0.32) 0%, rgba(192, 64, 32, 0) 60%),
    radial-gradient(ellipse at 75% 70%, rgba(224, 122, 60, 0.22) 0%, rgba(224, 122, 60, 0) 55%),
    linear-gradient(180deg, #1F120E 0%, #2A1A14 35%, #3A2418 70%, #4A2A1A 100%);
  filter: contrast(1.05) saturate(0.95);
}

.hero-backdrop::after {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    repeating-linear-gradient(
      180deg,
      rgba(192, 64, 32, 0.04) 0px,
      rgba(192, 64, 32, 0.04) 1px,
      transparent 1px,
      transparent 4px
    );
  mix-blend-mode: overlay;
}

.hero-content {
  position: relative;
  z-index: 2;
  text-align: center;
  max-width: 900px;
  padding: 0 24px;
  color: var(--tungsten-cream);
}

.hero-eyebrow {
  font-family: var(--font-body);
  font-style: italic;
  font-weight: 400;
  font-size: 14px;
  letter-spacing: 0.18em;
  text-transform: lowercase;
  color: var(--warm-sienna);
  margin-bottom: 24px;
  opacity: 0;
  transform: translateY(12px);
  animation: fade-up 1100ms ease-out 200ms forwards;
}

.hero-logotype {
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(56px, 12vw, 156px);
  line-height: 0.95;
  letter-spacing: -0.04em;
  color: var(--tungsten-cream);
  display: inline-block;
}

.logotype-letter {
  display: inline-block;
  opacity: 0;
  transform: translateY(20px);
  animation: letter-rise 800ms cubic-bezier(0.2, 0.8, 0.2, 1) forwards;
}

.logotype-letter:nth-child(1) { animation-delay: 300ms; }
.logotype-letter:nth-child(2) { animation-delay: 360ms; }
.logotype-letter:nth-child(3) { animation-delay: 420ms; }
.logotype-letter:nth-child(4) { animation-delay: 480ms; }
.logotype-letter:nth-child(5) { animation-delay: 540ms; }
.logotype-letter:nth-child(6) { animation-delay: 600ms; }
.logotype-letter:nth-child(7) { animation-delay: 660ms; }
.logotype-letter:nth-child(8) { animation-delay: 720ms; }

.hero-subtitle {
  font-family: var(--font-display);
  font-style: italic;
  font-weight: 400;
  font-size: clamp(20px, 2.4vw, 30px);
  color: var(--tungsten-cream);
  margin-top: 28px;
  opacity: 0;
  letter-spacing: 0.01em;
  animation: fade-up 1100ms ease-out 1100ms forwards;
}

.hero-rule {
  width: 80px;
  height: 1px;
  background: var(--warm-sienna);
  margin: 56px auto 28px;
  transform: scaleX(0);
  transform-origin: center;
  animation: rule-grow 900ms cubic-bezier(0.65, 0, 0.35, 1) 1500ms forwards;
}

.hero-instruction {
  font-family: var(--font-body);
  font-size: 13px;
  letter-spacing: 0.3em;
  text-transform: lowercase;
  color: var(--faded-ochre);
  opacity: 0;
  animation: fade-up 1100ms ease-out 1800ms forwards, gentle-bob 2400ms ease-in-out 2700ms infinite;
}

@keyframes fade-up {
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes letter-rise {
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes rule-grow {
  to {
    transform: scaleX(1);
  }
}

@keyframes gentle-bob {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(6px); }
}

/* ==========================================================================
   INTRO
   ========================================================================== */

.intro {
  position: relative;
  z-index: 2;
  padding: 200px 0 120px;
}

.lede {
  font-family: var(--font-display);
  font-weight: 400;
  font-style: italic;
  font-size: clamp(24px, 3vw, 36px);
  line-height: 1.45;
  color: var(--deep-espresso);
  margin-bottom: 56px;
  letter-spacing: -0.01em;
}

.lede em {
  color: var(--burnt-orange);
  font-style: italic;
  font-weight: 700;
}

.intro p:not(.lede) {
  font-size: clamp(18px, 1.3vw, 21px);
  color: var(--deep-espresso);
}

/* ==========================================================================
   STORY CARDS
   ========================================================================== */

.cards-section {
  position: relative;
  z-index: 2;
  padding: 80px 0 160px;
}

.story-card {
  margin: 0 auto 200px;
  perspective: 2000px;
}

.story-card:last-child {
  margin-bottom: 80px;
}

.card-meta {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  margin-bottom: 24px;
  font-family: var(--font-body);
  font-size: 13px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--faded-ochre);
}

.card-number {
  font-weight: 600;
  color: var(--burnt-orange);
}

.card-date {
  font-style: italic;
  text-transform: lowercase;
  letter-spacing: 0.08em;
}

.card-flip {
  position: relative;
  width: 100%;
  min-height: 380px;
  transform-style: preserve-3d;
  transition: transform var(--transition-slow);
  will-change: transform;
}

.card-flip.is-flipped {
  transform: rotateX(180deg);
}

.card-face {
  position: absolute;
  inset: 0;
  width: 100%;
  min-height: 380px;
  padding: 56px 48px;
  -webkit-backface-visibility: hidden;
  backface-visibility: hidden;
  display: flex;
  flex-direction: column;
  justify-content: center;
  border-radius: 2px;
  box-shadow:
    0 1px 0 rgba(184, 144, 96, 0.4),
    0 12px 28px -16px rgba(42, 26, 20, 0.35),
    0 2px 4px -2px rgba(42, 26, 20, 0.18);
}

/* Front face -- white card with subtle warm tint */
.card-face-front {
  background: var(--pure-white);
  background-image:
    linear-gradient(180deg, rgba(245, 232, 216, 0) 0%, rgba(245, 232, 216, 0.35) 100%);
  color: var(--deep-espresso);
  border: 1px solid rgba(184, 144, 96, 0.28);
}

.card-face-front::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 4px;
  height: 100%;
  background: var(--burnt-orange);
}

/* Back face -- burnt-orange tinted, the revelation */
.card-face-back {
  background: linear-gradient(160deg, #2A1A14 0%, #3F1E12 55%, #4A2616 100%);
  color: var(--tungsten-cream);
  transform: rotateX(180deg);
  border: 1px solid rgba(192, 64, 32, 0.55);
  box-shadow:
    inset 0 0 60px rgba(192, 64, 32, 0.18),
    0 12px 32px -12px rgba(42, 26, 20, 0.55);
}

.card-face-back::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 4px;
  height: 100%;
  background: var(--warm-sienna);
}

.card-face-back::after {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background: radial-gradient(
    ellipse at center,
    rgba(0, 0, 0, 0) 40%,
    rgba(0, 0, 0, 0.28) 100%
  );
}

.card-eyebrow {
  font-family: var(--font-body);
  font-weight: 600;
  font-size: 12px;
  letter-spacing: 0.24em;
  text-transform: uppercase;
  color: var(--burnt-orange);
  margin-bottom: 28px;
}

.card-eyebrow-back {
  color: var(--warm-sienna);
}

.card-quote {
  font-family: var(--font-display);
  font-weight: 400;
  font-style: italic;
  font-size: clamp(24px, 3vw, 38px);
  line-height: 1.4;
  letter-spacing: -0.01em;
  color: var(--deep-espresso);
  margin-bottom: 28px;
  position: relative;
  padding-left: 0;
}

.card-quote::before {
  content: "\201C";
  position: absolute;
  top: -28px;
  left: -8px;
  font-family: var(--font-display);
  font-size: 80px;
  line-height: 1;
  color: var(--burnt-orange);
  opacity: 0.3;
}

.card-attribution {
  font-family: var(--font-body);
  font-size: 14px;
  font-style: italic;
  color: var(--faded-ochre);
  letter-spacing: 0.04em;
}

.card-revelation {
  font-family: var(--font-body);
  font-weight: 500;
  font-size: clamp(18px, 1.5vw, 22px);
  line-height: 1.65;
  color: var(--tungsten-cream);
  margin-bottom: 24px;
}

.card-source {
  font-family: var(--font-body);
  font-size: 13px;
  font-style: italic;
  color: var(--faded-ochre);
  letter-spacing: 0.05em;
  margin-top: auto;
  border-top: 1px solid rgba(184, 144, 96, 0.4);
  padding-top: 16px;
}

/* ==========================================================================
   INTERLUDE
   ========================================================================== */

.interlude {
  position: relative;
  z-index: 2;
  padding: 80px 0 80px;
  text-align: center;
}

.interlude-text {
  font-family: var(--font-display);
  font-style: italic;
  font-weight: 400;
  font-size: clamp(22px, 2.6vw, 32px);
  line-height: 1.45;
  color: var(--deep-espresso);
  letter-spacing: -0.01em;
  position: relative;
  padding: 32px 0;
}

.interlude-text::before,
.interlude-text::after {
  content: "";
  display: block;
  width: 60px;
  height: 1px;
  background: var(--faded-ochre);
  margin: 24px auto;
}

/* ==========================================================================
   METHOD
   ========================================================================== */

.method {
  position: relative;
  z-index: 2;
  padding: 120px 0 120px;
}

.section-title {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(34px, 4.5vw, 56px);
  line-height: 1.1;
  letter-spacing: -0.02em;
  color: var(--deep-espresso);
  margin-bottom: 48px;
  position: relative;
  padding-bottom: 24px;
}

.section-title::after {
  content: "";
  display: block;
  position: absolute;
  bottom: 0;
  left: 0;
  width: 80px;
  height: 2px;
  background: var(--burnt-orange);
}

.method p {
  font-size: clamp(17px, 1.2vw, 20px);
  color: var(--deep-espresso);
  margin-bottom: 1.4em;
}

/* ==========================================================================
   CLOSING
   ========================================================================== */

.closing {
  position: relative;
  z-index: 2;
  padding: 160px 0 200px;
  text-align: center;
}

.closing-epigraph {
  font-family: var(--font-display);
  font-style: italic;
  font-weight: 400;
  font-size: clamp(20px, 2.4vw, 30px);
  line-height: 1.5;
  color: var(--deep-espresso);
  letter-spacing: -0.005em;
  margin-bottom: 64px;
  position: relative;
}

.closing-epigraph::before {
  content: "";
  display: block;
  width: 40px;
  height: 1px;
  background: var(--burnt-orange);
  margin: 0 auto 36px;
}

.closing-cta {
  display: inline-block;
  font-family: var(--font-body);
  font-weight: 500;
  font-size: 14px;
  letter-spacing: 0.24em;
  text-transform: uppercase;
  color: var(--burnt-orange);
  border: 1px solid var(--burnt-orange);
  border-bottom: 1px solid var(--burnt-orange);
  padding: 18px 36px;
  border-radius: 1px;
  transition: all var(--transition-medium);
  background: transparent;
}

.closing-cta:hover {
  background: var(--burnt-orange);
  color: var(--tungsten-cream);
}

.closing-fineprint {
  margin-top: 80px;
  font-family: var(--font-body);
  font-style: italic;
  font-size: 12px;
  letter-spacing: 0.2em;
  text-transform: lowercase;
  color: var(--faded-ochre);
}

/* ==========================================================================
   Initial card state (pre-flip)
   Cards start un-flipped; JS adds .is-flipped on intersection
   ========================================================================== */
.story-card .card-flip {
  transform: rotateX(0deg);
}

/* ==========================================================================
   Responsive
   ========================================================================== */
@media (max-width: 720px) {
  .container {
    padding: 0 24px;
  }
  .hero-content {
    padding: 0 16px;
  }
  .card-face {
    padding: 40px 28px;
    min-height: 420px;
  }
  .card-flip {
    min-height: 420px;
  }
  .story-card {
    margin-bottom: 140px;
  }
  .intro {
    padding: 140px 0 80px;
  }
  .method {
    padding: 80px 0 80px;
  }
  .closing {
    padding: 120px 0 140px;
  }
  .crystal {
    opacity: 0.06;
  }
  .card-quote::before {
    font-size: 60px;
    top: -20px;
  }
}

@media (max-width: 480px) {
  body {
    font-size: 16px;
  }
  .card-face {
    padding: 32px 22px;
    min-height: 460px;
  }
  .card-flip {
    min-height: 460px;
  }
  .card-meta {
    font-size: 11px;
  }
}

/* Safari/older browser fallback for backface */
@supports not ((backface-visibility: hidden) or (-webkit-backface-visibility: hidden)) {
  .card-face-back {
    display: none;
  }
  .is-flipped .card-face-front {
    display: none;
  }
  .is-flipped .card-face-back {
    display: flex;
    transform: rotateX(0);
  }
}