/**
 * www/lp/seasons/css/style.css
 * Four Seasons (Landscape Oil Painting Scrollytelling)
 */

@import url('https://fonts.googleapis.com/css2?family=Cinzel:wght@400;600;700&family=JetBrains+Mono:wght@300;400;500&family=Shippori+Mincho:wght@400;500;700;900&family=Zen+Kaku+Gothic+New:wght@300;400;500;700&display=swap');

:root {
  --bg-deep: #080B10;
  --text-pure: #FFFFFF;
  --text-muted: #94A3B8;
  --accent-gold: #F59E0B;
  --accent-spring: #10B981;
  --accent-summer: #3B82F6;
  --accent-autumn: #F97316;
  --accent-winter: #818CF8;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  background-color: var(--bg-deep);
}

body {
  margin: 0;
  padding: 0;
  background-color: var(--bg-deep);
  color: var(--text-pure);
  font-family: 'Zen Kaku Gothic New', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  overflow-x: clip;
  -webkit-font-smoothing: antialiased;
}

/* Typography Helpers */
.font-serif-display {
  font-family: 'Cinzel', 'Shippori Mincho', serif;
  letter-spacing: 0.08em;
}

.font-mincho-jp {
  font-family: 'Shippori Mincho', serif;
  letter-spacing: 0.08em;
}

.font-mono-hud {
  font-family: 'JetBrains Mono', monospace;
  letter-spacing: 0.06em;
}

/* Scrollytelling Container (500vh scroll track) */
.scrolly-container {
  position: relative;
  width: 100%;
  height: 500vh;
}

.scrolly-sticky-frame {
  position: sticky;
  top: 0;
  width: 100%;
  height: 100vh;
  overflow: hidden;
  display: flex;
  align-items: center;
  justify-content: center;
}

/* Canvas for 16:9 Landscape Video Sequence */
#scrolly-canvas {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 100vw;
  height: 100vh;
  pointer-events: none;
}

/* Top Floating Progress Bar */
.scroll-progress-line {
  position: fixed;
  top: 0;
  left: 0;
  height: 3px;
  width: 0%;
  background: linear-gradient(90deg, #10B981, #3B82F6, #F97316, #818CF8);
  z-index: 60;
  transition: width 0.1s linear;
}

/* Story Overlay Layer */
.story-overlay {
  position: absolute;
  inset: 0;
  pointer-events: none;
  z-index: 20;
}

/* Stage Elements */
.story-stage {
  position: absolute;
  inset: 0;
  display: flex;
  opacity: 0;
  transform: translateY(16px);
  transition: opacity 0.7s cubic-bezier(0.16, 1, 0.3, 1), transform 0.7s cubic-bezier(0.16, 1, 0.3, 1);
  pointer-events: none;
}

.story-stage.is-active {
  opacity: 1;
  transform: translateY(0);
  pointer-events: auto;
}

/* Vertical Japanese Typography Styling */
.writing-vertical {
  writing-mode: vertical-rl;
  text-orientation: mixed;
  -webkit-writing-mode: vertical-rl;
  -ms-writing-mode: tb-rl;
  letter-spacing: 0.18em;
  line-height: 2.2;
}

/* Placement of Vertical Copy: Right Side on Desktop */
.vertical-container-right {
  position: absolute;
  top: 50%;
  right: clamp(2.5rem, 8vw, 10rem);
  transform: translateY(-50%);
  display: flex;
  flex-direction: row-reverse;
  align-items: flex-start;
  gap: clamp(1.25rem, 2.5vw, 3rem);
  max-height: 80vh;
  padding: 1.5rem 1.75rem;
  background: rgba(8, 11, 16, 0.45);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-radius: 1.5rem;
  border: 1px solid rgba(255, 255, 255, 0.15);
  box-shadow: 0 20px 40px rgba(0, 0, 0, 0.35);
}

@media (max-width: 768px) {
  .writing-vertical {
    writing-mode: horizontal-tb;
    -webkit-writing-mode: horizontal-tb;
    letter-spacing: 0.04em;
    line-height: 1.75;
  }
  .vertical-container-right {
    position: absolute;
    right: 1.25rem;
    left: 1.25rem;
    top: auto;
    bottom: 5.5rem;
    transform: none;
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
    gap: 0.75rem;
    max-height: none;
    padding: 1.25rem 1.5rem;
  }
  .vertical-act-badge {
    margin-bottom: 0.25rem;
    font-size: 0.7rem;
    border-left: none !important;
    border-bottom: 1px solid rgba(245, 158, 11, 0.5);
    padding-left: 0 !important;
    padding-bottom: 0.25rem;
  }
  .vertical-main-title {
    font-size: 1.75rem !important;
  }
  .vertical-sub-text {
    font-size: 0.85rem !important;
    max-width: 320px;
    margin: 0 auto;
  }
}

/* Horizontal English Typography Alternative */
.horizontal-container-right {
  position: absolute;
  top: 50%;
  right: clamp(2.5rem, 8vw, 10rem);
  transform: translateY(-50%);
  max-width: 480px;
  padding: 2.25rem 2.5rem;
  background: rgba(8, 11, 16, 0.5);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-radius: 1.5rem;
  border: 1px solid rgba(255, 255, 255, 0.15);
  box-shadow: 0 20px 40px rgba(0, 0, 0, 0.35);
}

@media (max-width: 768px) {
  .horizontal-container-right {
    right: 1.25rem;
    left: 1.25rem;
    top: auto;
    bottom: 5.5rem;
    transform: none;
    max-width: none;
    text-align: center;
    padding: 1.25rem 1.5rem;
  }
}

/* Act Tag / HUD in Vertical Layout */
.vertical-act-badge {
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.75rem;
  letter-spacing: 0.2em;
  color: var(--accent-gold);
  border-left: 1px solid rgba(245, 158, 11, 0.5);
  padding-left: 0.5rem;
  margin-left: 0.25rem;
}

/* Catchphrase Main Title */
.vertical-main-title {
  font-family: 'Shippori Mincho', serif;
  font-size: clamp(1.75rem, 3.2vw, 3rem);
  font-weight: 700;
  color: #FFFFFF;
  text-shadow: 0 4px 20px rgba(0, 0, 0, 0.8);
}

/* Catchphrase Sub Text */
.vertical-sub-text {
  font-family: 'Shippori Mincho', serif;
  font-size: clamp(0.85rem, 1.1vw, 1.05rem);
  font-weight: 400;
  color: #F1F5F9;
  text-shadow: 0 2px 14px rgba(0, 0, 0, 0.8);
}

/* Final Kamos Launch Portal Stage (Act IV Climax) */
.final-launch-stage {
  position: absolute;
  inset: 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  opacity: 0;
  transform: scale(0.96);
  transition: opacity 0.8s cubic-bezier(0.16, 1, 0.3, 1), transform 0.8s cubic-bezier(0.16, 1, 0.3, 1);
  pointer-events: none;
  z-index: 30;
}

.final-launch-stage.is-active {
  opacity: 1;
  transform: scale(1);
  pointer-events: auto;
}

/* Glassmorphic Launch Card */
.launch-card {
  background: rgba(255, 255, 255, 0.55);
  backdrop-filter: blur(28px);
  -webkit-backdrop-filter: blur(28px);
  border: 1px solid rgba(255, 255, 255, 0.75);
  box-shadow: 0 20px 50px -10px rgba(0, 0, 0, 0.25), 0 0 30px rgba(255, 255, 255, 0.4);
  border-radius: 2rem;
  padding: clamp(2.25rem, 4vw, 3.25rem) clamp(1.5rem, 3vw, 2.5rem);
  max-width: 640px;
  width: 90%;
  text-align: center;
  color: #1E293B;
  transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.launch-card:hover {
  transform: translateY(-2px);
  box-shadow: 0 25px 60px -10px rgba(0, 0, 0, 0.3), 0 0 40px rgba(255, 255, 255, 0.5);
}

/* Primary Launch Button */
.btn-launch-kamos {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.75rem;
  background: #0F172A;
  color: #FFFFFF;
  font-family: 'Zen Kaku Gothic New', sans-serif;
  font-weight: 700;
  font-size: 1rem;
  letter-spacing: 0.05em;
  padding: 0.85rem 1.75rem;
  border-radius: 9999px;
  white-space: nowrap;
  box-shadow: 0 10px 25px -5px rgba(15, 23, 42, 0.3);
  transition: all 0.25s cubic-bezier(0.16, 1, 0.3, 1);
  text-decoration: none;
}

.btn-launch-kamos:hover {
  background: #1E293B;
  transform: scale(1.03);
  box-shadow: 0 15px 35px -5px rgba(15, 23, 42, 0.4);
}

/* Initial Loading Curtain (FOUC Zero Defense) */
#loader-curtain {
  position: fixed;
  inset: 0;
  z-index: 99999;
  background-color: var(--bg-deep);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  transition: opacity 0.8s cubic-bezier(0.16, 1, 0.3, 1), visibility 0.8s;
}

#loader-curtain.is-hidden {
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
}