/* showa.boo — Showa-era brutalist + neon */
/* Palette */
:root {
  --concrete: #b8b0a4;
  --concrete-cream: #d4ccc0;
  --rain-glass: #c4beb4;
  --night-concrete: #4a4440;
  --shadow-black: #2a2624;
  --neon-amber: #e8a84c;
  --fluor-pink: #e87878;
  --halo-amber: rgba(232, 168, 76, 0.55);
  --halo-pink: rgba(232, 120, 120, 0.45);
  --bg-primary: var(--concrete);
  --text-primary: var(--shadow-black);
  --serif: "Archivo", "Inter", system-ui, sans-serif;
  --body-font: "Work Sans", "Inter", system-ui, sans-serif;
  --mono: "JetBrains Mono", "Space Mono", ui-monospace, monospace;
}

* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
}

body {
  background: var(--concrete);
  color: var(--text-primary);
  font-family: var(--body-font);
  font-size: clamp(15px, 1.6vw, 18px);
  line-height: 1.75;
  overflow-x: hidden;
  position: relative;
}

/* Concrete grain layer */
.grain-svg {
  position: fixed;
  inset: 0;
  width: 100vw;
  height: 100vh;
  pointer-events: none;
  z-index: 1;
  opacity: 1;
}

.grain-layer {
  position: absolute;
  inset: 0;
  background-image: radial-gradient(circle at 20% 30%, rgba(74, 68, 64, 0.12), transparent 60%),
    radial-gradient(circle at 80% 70%, rgba(232, 168, 76, 0.08), transparent 55%);
  pointer-events: none;
}

/* === Opening header === */
.opening {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 6rem 5vw 5rem;
  background: linear-gradient(180deg, var(--concrete) 0%, var(--concrete-cream) 100%);
  overflow: hidden;
  z-index: 2;
}

.opening-inner {
  position: relative;
  text-align: center;
  z-index: 3;
}

.kanji-stage {
  position: relative;
  display: inline-block;
  margin-bottom: 2.5rem;
}

.kanji {
  font-family: var(--serif);
  font-weight: 900;
  font-size: clamp(96px, 18vw, 220px);
  letter-spacing: 0.04em;
  color: var(--neon-amber);
  text-shadow:
    0 0 8px rgba(232, 168, 76, 0.85),
    0 0 24px rgba(232, 168, 76, 0.65),
    0 0 60px rgba(232, 168, 76, 0.4),
    0 0 90px rgba(232, 120, 120, 0.25);
  animation: tube-warm-up 2.6s ease-out 0.6s both, neon-breathe 6s ease-in-out 3.5s infinite;
  position: relative;
  z-index: 4;
}

.kanji-halo {
  position: absolute;
  inset: -25%;
  background: radial-gradient(circle, rgba(232, 168, 76, 0.35) 0%, rgba(232, 120, 120, 0.08) 45%, transparent 75%);
  z-index: 1;
  pointer-events: none;
  animation: halo-pulse 8s ease-in-out infinite;
}

.latin-mark {
  font-family: var(--mono);
  font-size: clamp(24px, 4vw, 40px);
  letter-spacing: 0.6em;
  color: var(--shadow-black);
  margin-bottom: 1.5rem;
  text-transform: lowercase;
  opacity: 0;
  animation: ink-fade-in 1.4s ease-out 2.1s forwards;
}

.opening-byline {
  font-family: var(--body-font);
  font-weight: 400;
  font-size: clamp(14px, 1.4vw, 17px);
  color: var(--night-concrete);
  letter-spacing: 0.12em;
  text-transform: uppercase;
  opacity: 0;
  animation: ink-fade-in 1.4s ease-out 2.6s forwards;
}

.scroll-hint {
  position: absolute;
  bottom: 2.5rem;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.6rem;
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.4em;
  text-transform: uppercase;
  color: var(--night-concrete);
  opacity: 0.7;
}

.hint-line {
  width: 1px;
  height: 48px;
  background: linear-gradient(180deg, transparent, var(--night-concrete));
  animation: line-pulse 2.4s ease-in-out infinite;
}

/* === Frames === */
.shotengai {
  position: relative;
  z-index: 2;
}

.frame {
  position: relative;
  padding: 7rem 5vw;
  border-top: 1px solid rgba(74, 68, 64, 0.18);
  background: var(--concrete);
}

.frame:nth-child(2n) {
  background: var(--concrete-cream);
}

.frame-introduction {
  background: var(--concrete-cream);
}

.frame-streets {
  background: var(--concrete);
}

.frame-neon {
  background: var(--shadow-black);
  color: var(--concrete-cream);
}

.frame-rain {
  background: var(--rain-glass);
}

.frame-typography {
  background: var(--concrete-cream);
}

.frame-palette {
  background: var(--concrete);
}

.frame-closing {
  background: linear-gradient(180deg, var(--night-concrete) 0%, var(--shadow-black) 100%);
  color: var(--concrete-cream);
}

.frame-inner {
  max-width: 980px;
  margin: 0 auto;
  position: relative;
}

.frame-inner--dark .frame-title,
.frame-inner--closing .frame-title {
  color: var(--neon-amber);
}

.frame-inner--dark .panel-text,
.frame-inner--closing .panel-text,
.frame-inner--dark .frame-lede,
.frame-inner--closing .frame-lede {
  color: var(--concrete-cream);
}

/* Tin signs */
.tin-sign {
  display: inline-flex;
  align-items: center;
  gap: 0.8rem;
  padding: 0.5rem 1.1rem;
  border: 1px solid var(--night-concrete);
  background: rgba(196, 190, 180, 0.5);
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--night-concrete);
  margin-bottom: 1.6rem;
  box-shadow: 2px 3px 0 rgba(42, 38, 36, 0.18);
  transition: transform 0.5s ease, box-shadow 0.5s ease;
}

.tin-sign--left {
  transform: rotate(-0.4deg);
}

.tin-sign--right {
  margin-left: auto;
  transform: rotate(0.3deg);
  display: inline-flex;
}

.frame-streets .tin-sign,
.frame-rain .tin-sign,
.frame-palette .tin-sign {
  margin-left: auto;
  display: inline-flex;
}

.tin-sign--center {
  display: flex;
  margin: 0 auto 1.6rem;
  width: max-content;
}

.frame-inner--dark .tin-sign,
.frame-inner--closing .tin-sign {
  border-color: var(--neon-amber);
  background: rgba(232, 168, 76, 0.08);
  color: var(--neon-amber);
  box-shadow: 0 0 12px rgba(232, 168, 76, 0.35);
}

.tin-sign:hover {
  transform: rotate(0deg) translateY(-2px);
  box-shadow: 2px 5px 0 rgba(42, 38, 36, 0.28);
}

.sign-prefix {
  font-weight: 500;
  opacity: 0.85;
}

.sign-name {
  font-weight: 400;
}

/* Frame title + body */
.frame-title {
  font-family: var(--serif);
  font-weight: 700;
  font-size: clamp(32px, 6vw, 64px);
  letter-spacing: 0.04em;
  text-transform: uppercase;
  margin-bottom: 1.4rem;
  line-height: 1.05;
}

.frame-title--neon {
  text-shadow: 0 0 14px rgba(232, 168, 76, 0.6), 0 0 38px rgba(232, 168, 76, 0.35);
}

.frame-title--closing {
  text-shadow: 0 0 12px rgba(232, 168, 76, 0.5);
}

.frame-lede {
  font-size: clamp(17px, 1.9vw, 22px);
  font-weight: 400;
  color: var(--night-concrete);
  max-width: 60ch;
  margin-bottom: 2.2rem;
  line-height: 1.6;
}

.layered-panel {
  background: rgba(196, 190, 180, 0.42);
  border: 1px solid rgba(74, 68, 64, 0.18);
  backdrop-filter: blur(2px);
  -webkit-backdrop-filter: blur(2px);
  padding: 2rem 2.2rem;
  margin-top: 1.5rem;
  position: relative;
}

.layered-panel--glass {
  background: rgba(212, 204, 192, 0.55);
  box-shadow: inset 0 0 28px rgba(74, 68, 64, 0.12);
}

.layered-panel::before {
  content: "";
  position: absolute;
  inset: -10px -10px auto auto;
  width: 30px;
  height: 30px;
  border-top: 1px solid var(--night-concrete);
  border-right: 1px solid var(--night-concrete);
  pointer-events: none;
}

.layered-panel::after {
  content: "";
  position: absolute;
  inset: auto auto -10px -10px;
  width: 30px;
  height: 30px;
  border-bottom: 1px solid var(--night-concrete);
  border-left: 1px solid var(--night-concrete);
  pointer-events: none;
}

.panel-text {
  margin-bottom: 1rem;
  color: var(--shadow-black);
}

.panel-text:last-child {
  margin-bottom: 0;
}

.panel-text em {
  color: var(--neon-amber);
  font-style: italic;
  font-weight: 600;
  text-shadow: 0 0 8px rgba(232, 168, 76, 0.45);
}

/* Streets — dual column */
.dual-column {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 2.4rem;
  margin-top: 1.8rem;
}

.dual-pane {
  position: relative;
}

.store-list {
  list-style: none;
  margin-top: 1.2rem;
}

.store-list li {
  display: flex;
  gap: 0.8rem;
  align-items: baseline;
  padding: 0.6rem 0;
  border-bottom: 1px dashed rgba(74, 68, 64, 0.25);
  font-size: 15px;
  color: var(--shadow-black);
}

.store-tag {
  font-family: var(--serif);
  font-weight: 700;
  color: var(--neon-amber);
  letter-spacing: 0.05em;
  min-width: 2.4em;
  text-shadow: 0 0 8px rgba(232, 168, 76, 0.35);
}

.window-frame {
  position: relative;
  height: 280px;
  border: 1px solid var(--night-concrete);
  background: var(--shadow-black);
  overflow: hidden;
  display: flex;
  align-items: flex-end;
  padding: 1.2rem;
}

.window-glow {
  position: absolute;
  border-radius: 50%;
  filter: blur(28px);
  pointer-events: none;
}

.window-glow--amber {
  width: 220px;
  height: 220px;
  background: var(--neon-amber);
  top: 20%;
  left: 15%;
  opacity: 0.7;
  animation: window-drift-a 9s ease-in-out infinite;
}

.window-glow--pink {
  width: 160px;
  height: 160px;
  background: var(--fluor-pink);
  top: 30%;
  right: 10%;
  opacity: 0.55;
  animation: window-drift-b 11s ease-in-out infinite;
}

.window-caption {
  position: relative;
  z-index: 2;
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--concrete-cream);
}

/* Neon grid */
.neon-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 1.5rem;
  margin-top: 2rem;
}

.neon-tile {
  position: relative;
  padding: 2rem 1rem 1.4rem;
  border: 1px solid rgba(232, 168, 76, 0.35);
  background: rgba(232, 168, 76, 0.04);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.8rem;
  transition: transform 0.3s ease, background 0.3s ease, border-color 0.3s ease;
}

.neon-tile:hover {
  transform: translateY(-3px);
  background: rgba(232, 168, 76, 0.1);
  border-color: var(--neon-amber);
}

.neon-char {
  font-family: var(--serif);
  font-weight: 900;
  font-size: clamp(40px, 5vw, 60px);
  color: var(--neon-amber);
  text-shadow:
    0 0 6px rgba(232, 168, 76, 0.85),
    0 0 18px rgba(232, 168, 76, 0.55),
    0 0 36px rgba(232, 120, 120, 0.3);
  letter-spacing: 0.05em;
}

.neon-char.flicker {
  animation: tube-flicker 4s steps(1, end) infinite;
}

.neon-char.flicker-slow {
  animation: tube-flicker-slow 7s steps(1, end) infinite;
}

.neon-label {
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: 0.2em;
  text-transform: lowercase;
  color: var(--concrete-cream);
  opacity: 0.7;
  text-align: center;
}

/* Rain stage */
.rain-stage {
  position: relative;
  height: 220px;
  margin-top: 2rem;
  border: 1px solid rgba(74, 68, 64, 0.25);
  background: rgba(42, 38, 36, 0.4);
  overflow: hidden;
}

.rain-drop {
  position: absolute;
  top: -10%;
  width: 1px;
  height: 28px;
  background: linear-gradient(180deg, transparent, rgba(212, 204, 192, 0.6));
  animation: rain-fall 1.8s linear infinite;
}

/* Type spec grid */
.type-spec-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 1.6rem;
  margin-top: 2rem;
}

.type-spec {
  border: 1px solid rgba(74, 68, 64, 0.25);
  padding: 1.6rem 1.4rem;
  background: rgba(184, 176, 164, 0.18);
  display: flex;
  flex-direction: column;
  gap: 0.8rem;
  transition: transform 0.4s ease, border-color 0.4s ease;
}

.type-spec:hover {
  transform: translateY(-2px);
  border-color: var(--neon-amber);
}

.type-spec-tag {
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.3em;
  text-transform: uppercase;
  color: var(--night-concrete);
}

.type-spec-sample {
  font-family: var(--serif);
  font-weight: 700;
  font-size: clamp(28px, 3.4vw, 42px);
  color: var(--shadow-black);
  letter-spacing: 0.04em;
}

.type-spec-sample--body {
  font-family: var(--body-font);
  font-weight: 400;
  letter-spacing: 0.01em;
}

.type-spec-sample--mono {
  font-family: var(--mono);
  font-weight: 400;
  font-size: clamp(20px, 2.6vw, 32px);
}

.type-spec-sample--kanji {
  font-family: var(--serif);
  font-weight: 900;
  color: var(--neon-amber);
  text-shadow: 0 0 14px rgba(232, 168, 76, 0.55);
}

.type-spec-meta {
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.18em;
  text-transform: lowercase;
  color: var(--night-concrete);
  opacity: 0.8;
}

/* Palette swatches */
.palette-row {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
  gap: 1rem;
  margin: 1.8rem 0 1.2rem;
}

.swatch {
  font: inherit;
  border: 1px solid rgba(74, 68, 64, 0.22);
  background: rgba(212, 204, 192, 0.4);
  padding: 1rem 1rem 1.1rem;
  cursor: pointer;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  text-align: left;
  transition: transform 0.3s ease, border-color 0.3s ease, box-shadow 0.3s ease;
  color: inherit;
}

.swatch:hover {
  transform: translateY(-2px);
  border-color: var(--neon-amber);
  box-shadow: 0 4px 0 rgba(42, 38, 36, 0.1);
}

.swatch.is-active {
  border-color: var(--neon-amber);
  box-shadow: 0 0 0 2px rgba(232, 168, 76, 0.45);
}

.swatch-chip {
  display: block;
  height: 56px;
  border: 1px solid rgba(42, 38, 36, 0.25);
  background-color: var(--chip-color, var(--concrete));
}

.swatch:nth-child(1) .swatch-chip { background-color: #e8a84c; }
.swatch:nth-child(2) .swatch-chip { background-color: #e87878; }
.swatch:nth-child(3) .swatch-chip { background-color: #b8b0a4; }
.swatch:nth-child(4) .swatch-chip { background-color: #d4ccc0; }
.swatch:nth-child(5) .swatch-chip { background-color: #c4beb4; }
.swatch:nth-child(6) .swatch-chip { background-color: #4a4440; }
.swatch:nth-child(7) .swatch-chip { background-color: #2a2624; }

.swatch-name {
  font-family: var(--serif);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--shadow-black);
}

.swatch-hex {
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.18em;
  color: var(--night-concrete);
}

.palette-readout {
  font-family: var(--mono);
  font-size: 13px;
  letter-spacing: 0.18em;
  text-transform: lowercase;
  color: var(--night-concrete);
  margin-top: 1rem;
  min-height: 1.4em;
}

/* Closing */
.frame-inner--closing {
  text-align: center;
}

.signoff {
  font-family: var(--serif);
  font-weight: 700;
  font-size: clamp(20px, 2.4vw, 30px);
  letter-spacing: 0.06em;
  color: var(--neon-amber);
  margin: 2rem 0 1.6rem;
  text-shadow: 0 0 14px rgba(232, 168, 76, 0.4);
}

.closing-meta {
  display: inline-flex;
  gap: 1rem;
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--concrete-cream);
  opacity: 0.7;
  border: 1px solid rgba(232, 168, 76, 0.4);
  padding: 0.6rem 1.2rem;
}

.meta-key {
  color: var(--neon-amber);
}

/* Ledger footer */
.ledger {
  background: var(--shadow-black);
  color: var(--concrete-cream);
  padding: 2rem 5vw;
  position: relative;
  z-index: 2;
}

.ledger-inner {
  max-width: 980px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1.5rem;
}

.ledger-mark {
  font-family: var(--serif);
  font-weight: 900;
  font-size: 28px;
  color: var(--neon-amber);
  text-shadow: 0 0 12px rgba(232, 168, 76, 0.6);
}

.ledger-line {
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: 0.2em;
  text-transform: lowercase;
  color: var(--concrete-cream);
  opacity: 0.7;
}

/* Animations */
@keyframes tube-warm-up {
  0% { opacity: 0; filter: brightness(0.2); text-shadow: none; }
  20% { opacity: 0.4; filter: brightness(0.6); }
  35% { opacity: 0.15; }
  55% { opacity: 0.6; filter: brightness(0.8); }
  70% { opacity: 0.85; }
  100% { opacity: 1; filter: brightness(1); text-shadow:
    0 0 8px rgba(232, 168, 76, 0.85),
    0 0 24px rgba(232, 168, 76, 0.65),
    0 0 60px rgba(232, 168, 76, 0.4),
    0 0 90px rgba(232, 120, 120, 0.25); }
}

@keyframes neon-breathe {
  0%, 100% { filter: brightness(1); }
  50% { filter: brightness(1.08); }
}

@keyframes halo-pulse {
  0%, 100% { transform: scale(1); opacity: 0.85; }
  50% { transform: scale(1.06); opacity: 1; }
}

@keyframes ink-fade-in {
  to { opacity: 1; }
}

@keyframes line-pulse {
  0%, 100% { transform: scaleY(0.4); transform-origin: top; opacity: 0.4; }
  50% { transform: scaleY(1); opacity: 1; }
}

@keyframes tube-flicker {
  0%, 17%, 19%, 22%, 100% { opacity: 1; }
  18%, 21% { opacity: 0.35; }
  76%, 78% { opacity: 0.4; }
  77% { opacity: 0.85; }
}

@keyframes tube-flicker-slow {
  0%, 12%, 14%, 100% { opacity: 1; }
  13% { opacity: 0.45; }
  60%, 62% { opacity: 0.5; }
  61% { opacity: 0.9; }
}

@keyframes window-drift-a {
  0%, 100% { transform: translate(0, 0); }
  50% { transform: translate(20px, -10px); }
}

@keyframes window-drift-b {
  0%, 100% { transform: translate(0, 0); }
  50% { transform: translate(-15px, 12px); }
}

@keyframes rain-fall {
  0% { transform: translateY(-30px); opacity: 0; }
  10% { opacity: 0.7; }
  100% { transform: translateY(260px); opacity: 0; }
}

/* Section reveal */
.frame {
  opacity: 0;
  transform: translateY(28px);
  transition: opacity 1s ease, transform 1s ease;
}

.frame.is-visible {
  opacity: 1;
  transform: translateY(0);
}

/* Responsive */
@media (max-width: 720px) {
  .dual-column {
    grid-template-columns: 1fr;
  }
  .ledger-inner {
    flex-direction: column;
    gap: 0.8rem;
    text-align: center;
  }
  .frame {
    padding: 5rem 5vw;
  }
}