/* ============================================
   ヤンデレ学園 ～どこにいても、あなたのそばに～
   ============================================ */

:root {
  --yn-bg: #1a0a2e;
  --yn-pink: #ff6b9d;
  --yn-pink-dark: #c9184a;
  --yn-pink-glow: rgba(255, 107, 157, 0.4);
  --yn-sakura: #ffb7c5;
  --yn-white: #f8f0ff;
  --yn-gray: #b0a0c0;
  --yn-green: #4ade80;
  --yn-blue: #60a5fa;
  --yn-yellow: #fbbf24;
  --yn-red: #ef4444;
  --yn-font: 'Zen Maru Gothic', sans-serif;
  --yn-font-title: 'Hachi Maru Pop', cursive;
}

html, body {
  width: 100%;
  height: 100dvh;
  overflow: hidden;
  font-family: var(--yn-font);
  background: var(--yn-bg);
  color: var(--yn-white);
  user-select: none;
  -webkit-user-select: none;
}

/* ===== SCREENS ===== */
.screen {
  display: none;
  position: absolute;
  inset: 0;
  z-index: 1;
}
.screen.active {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
}

/* ===== BACK LINK ===== */
.back-to-top-link {
  position: fixed;
  top: 10px;
  left: 10px;
  z-index: 1000;
  color: var(--yn-sakura);
  text-decoration: none;
  font-size: 0.8rem;
  font-weight: 700;
  background: rgba(26, 10, 46, 0.9);
  padding: 5px 12px;
  border-radius: 20px;
  border: 1px solid rgba(255, 183, 197, 0.3);
  backdrop-filter: blur(6px);
  transition: all 0.3s;
}
.back-to-top-link:hover {
  background: rgba(255, 183, 197, 0.15);
  border-color: var(--yn-sakura);
}

/* ===== SAKURA PARTICLES ===== */
.sakura-container {
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 0;
  overflow: hidden;
}
.sakura {
  position: absolute;
  top: -30px;
  font-size: 1.2rem;
  opacity: 0.5;
  animation: sakuraFall linear infinite;
}
@keyframes sakuraFall {
  0% { transform: translateY(-30px) rotate(0deg) translateX(0); opacity: 0.5; }
  50% { opacity: 0.7; }
  100% { transform: translateY(105vh) rotate(360deg) translateX(80px); opacity: 0; }
}

/* ===== TITLE SCREEN ===== */
#title-screen {
  background: radial-gradient(ellipse at center bottom, #2d1050 0%, #1a0a2e 50%, #0d0518 100%);
}
.title-wrap {
  text-align: center;
  padding: 1.5rem;
  animation: fadeInUp 0.8s ease-out;
}
.title-icon {
  font-size: 64px;
  animation: heartbeat 1.5s infinite;
  filter: drop-shadow(0 0 20px var(--yn-pink-glow));
}
@keyframes heartbeat {
  0%, 100% { transform: scale(1); }
  15% { transform: scale(1.15); }
  30% { transform: scale(1); }
  45% { transform: scale(1.1); }
}
.title-main {
  font-family: var(--yn-font-title);
  font-size: clamp(1.6rem, 5.5vw, 2.5rem);
  color: var(--yn-pink);
  text-shadow: 0 0 20px var(--yn-pink-glow);
  margin-top: 0.5rem;
}
.title-sub {
  font-family: var(--yn-font-title);
  font-size: clamp(0.75rem, 2.5vw, 1rem);
  color: var(--yn-sakura);
  margin-top: 0.3rem;
  opacity: 0.8;
}
.title-desc {
  font-size: 0.85rem;
  color: var(--yn-gray);
  margin-top: 1.2rem;
  line-height: 1.8;
}
.btn-start {
  display: inline-block;
  margin-top: 1.5rem;
  padding: 14px 44px;
  font-family: var(--yn-font);
  font-size: 1.05rem;
  font-weight: 700;
  color: #fff;
  background: linear-gradient(135deg, var(--yn-pink), var(--yn-pink-dark));
  border: none;
  border-radius: 50px;
  cursor: pointer;
  transition: all 0.3s;
  box-shadow: 0 4px 20px var(--yn-pink-glow);
}
.btn-start:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 30px var(--yn-pink-glow);
}

/* ===== DAY HEADER ===== */
#day-intro {
  background: rgba(0, 0, 0, 0.95);
  z-index: 50;
}
.day-intro-text {
  font-family: var(--yn-font-title);
  font-size: clamp(1.8rem, 6vw, 3rem);
  color: var(--yn-sakura);
  text-shadow: 0 0 30px var(--yn-pink-glow);
  animation: fadeInUp 0.6s ease-out;
}
.day-intro-sub {
  font-size: 1rem;
  color: var(--yn-gray);
  margin-top: 0.5rem;
  animation: fadeInUp 0.6s 0.2s ease-out both;
}

/* ===== LOCATION SELECT ===== */
#location-screen {
  background: linear-gradient(180deg, #1a0a2e 0%, #2d1050 100%);
}
.location-header {
  font-family: var(--yn-font-title);
  font-size: clamp(1.1rem, 3.5vw, 1.4rem);
  color: var(--yn-sakura);
  margin-bottom: 0.3rem;
}
.location-sub {
  font-size: 0.8rem;
  color: var(--yn-gray);
  margin-bottom: 1.2rem;
}
.location-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 10px;
  width: 90%;
  max-width: 360px;
}
.location-btn {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 4px;
  padding: 16px 8px;
  background: rgba(255, 107, 157, 0.08);
  border: 2px solid rgba(255, 107, 157, 0.2);
  border-radius: 14px;
  color: var(--yn-white);
  font-family: var(--yn-font);
  font-size: 0.85rem;
  font-weight: 700;
  cursor: pointer;
  transition: all 0.3s;
}
.location-btn:hover {
  background: rgba(255, 107, 157, 0.2);
  border-color: var(--yn-pink);
  transform: translateY(-2px);
}
.location-emoji {
  font-size: 1.8rem;
}
.location-hint {
  font-size: 0.65rem;
  color: var(--yn-gray);
  font-weight: 400;
}

/* ===== AFFECTION GAUGE ===== */
.affection-bar {
  position: fixed;
  top: 10px;
  left: 50%;
  transform: translateX(-50%);
  z-index: 100;
  display: none;
  align-items: center;
  gap: 6px;
  background: rgba(0, 0, 0, 0.7);
  padding: 6px 14px;
  border-radius: 20px;
  backdrop-filter: blur(6px);
  border: 1px solid rgba(255, 107, 157, 0.3);
}
.affection-bar.visible {
  display: flex;
}
.affection-label {
  font-size: 0.7rem;
  color: var(--yn-sakura);
  white-space: nowrap;
}
.affection-track {
  width: 100px;
  height: 8px;
  background: rgba(255, 255, 255, 0.1);
  border-radius: 4px;
  overflow: hidden;
}
.affection-fill {
  height: 100%;
  width: 0%;
  background: linear-gradient(90deg, var(--yn-pink), var(--yn-pink-dark));
  border-radius: 4px;
  transition: width 0.5s ease;
}
.affection-heart {
  font-size: 0.9rem;
  animation: heartPulse 1s infinite;
}
@keyframes heartPulse {
  0%, 100% { transform: scale(1); }
  50% { transform: scale(1.2); }
}

/* ===== DAY COUNTER ===== */
.day-badge {
  position: fixed;
  top: 10px;
  left: 60px;
  z-index: 100;
  display: none;
  background: rgba(0, 0, 0, 0.7);
  padding: 5px 12px;
  border-radius: 20px;
  font-size: 0.75rem;
  color: var(--yn-sakura);
  backdrop-filter: blur(6px);
  border: 1px solid rgba(255, 183, 197, 0.3);
}
.day-badge.visible {
  display: block;
}

/* ===== DIALOGUE SCREEN ===== */
#dialogue-screen {
  background: linear-gradient(180deg, #e8d5f5 0%, #f5e6ff 30%, #fce4ec 100%);
  justify-content: flex-end;
}

/* ダイアログ画面では音量・シェアボタンを台詞ボックスの上に逃がす */
body:has(#dialogue-screen.active) .sg-sound-toggle,
body:has(#dialogue-screen.active) .sg-share-btn {
  bottom: calc(200px + env(safe-area-inset-bottom, 0px));
}

.dialogue-scene {
  position: absolute;
  inset: 0;
  display: flex;
  flex-direction: column;
}

/* Character display area */
.character-area {
  flex: 1;
  position: relative;
  display: flex;
  align-items: flex-end;
  justify-content: center;
  padding-bottom: 10px;
  overflow: hidden;
}

.character-sprite {
  position: absolute;
  bottom: 0;
  font-size: clamp(80px, 25vw, 140px);
  transition: all 0.4s ease;
  filter: drop-shadow(0 4px 12px rgba(0, 0, 0, 0.2));
}
.character-sprite.center {
  left: 50%;
  transform: translateX(-50%);
}
.character-sprite.left {
  left: 10%;
}
.character-sprite.right {
  right: 10%;
}
.character-sprite.hidden {
  opacity: 0;
  transform: translateX(-50%) scale(0.8);
}
.character-sprite.enter-left {
  animation: slideInLeft 0.4s ease-out forwards;
}
.character-sprite.enter-right {
  animation: slideInRight 0.4s ease-out forwards;
}
.character-sprite.stalker-burst {
  animation: stalkerBurst 0.5s ease-out forwards;
}

@keyframes slideInLeft {
  from { opacity: 0; transform: translateX(-100px); }
  to { opacity: 1; transform: translateX(0); }
}
@keyframes slideInRight {
  from { opacity: 0; transform: translateX(100px); }
  to { opacity: 1; transform: translateX(0); }
}
@keyframes stalkerBurst {
  0% { opacity: 0; transform: translateX(-50%) scale(0) rotate(-10deg); }
  60% { opacity: 1; transform: translateX(-50%) scale(1.2) rotate(3deg); }
  100% { opacity: 1; transform: translateX(-50%) scale(1) rotate(0deg); }
}

/* Location BG label */
.scene-location {
  position: absolute;
  top: 12px;
  left: 50%;
  transform: translateX(-50%);
  background: rgba(0, 0, 0, 0.5);
  padding: 4px 16px;
  border-radius: 12px;
  font-size: 0.75rem;
  color: #fff;
  backdrop-filter: blur(4px);
  z-index: 5;
}

/* Dialogue box */
.dialogue-box {
  position: relative;
  width: 100%;
  padding: 0 12px 12px;
  z-index: 10;
}
.dialogue-inner {
  background: rgba(0, 0, 0, 0.85);
  border-radius: 16px;
  padding: 14px 16px 16px;
  backdrop-filter: blur(8px);
  border: 1px solid rgba(255, 107, 157, 0.2);
  max-width: 500px;
  margin: 0 auto;
}
.dialogue-name {
  font-size: 0.75rem;
  font-weight: 700;
  margin-bottom: 6px;
  padding: 2px 10px;
  border-radius: 8px;
  display: inline-block;
}
.dialogue-name.pink { background: rgba(255, 107, 157, 0.3); color: var(--yn-pink); }
.dialogue-name.green { background: rgba(74, 222, 128, 0.3); color: var(--yn-green); }
.dialogue-name.blue { background: rgba(96, 165, 250, 0.3); color: var(--yn-blue); }
.dialogue-name.yellow { background: rgba(251, 191, 36, 0.3); color: var(--yn-yellow); }
.dialogue-name.narrator { background: rgba(176, 160, 192, 0.3); color: var(--yn-gray); }

.dialogue-text {
  font-size: clamp(0.85rem, 2.8vw, 1rem);
  line-height: 1.8;
  min-height: 3.2em;
  color: var(--yn-white);
}

.dialogue-advance {
  font-size: 0.65rem;
  color: var(--yn-gray);
  text-align: right;
  margin-top: 6px;
  animation: blink 1.2s infinite;
}
@keyframes blink {
  0%, 100% { opacity: 0.4; }
  50% { opacity: 1; }
}

/* ===== CHOICES ===== */
.choices-container {
  display: flex;
  flex-direction: column;
  gap: 8px;
  margin-top: 10px;
}
.choice-btn {
  width: 100%;
  padding: 12px 16px;
  font-family: var(--yn-font);
  font-size: 0.9rem;
  font-weight: 700;
  color: var(--yn-white);
  background: rgba(255, 107, 157, 0.1);
  border: 2px solid rgba(255, 107, 157, 0.3);
  border-radius: 12px;
  cursor: pointer;
  transition: all 0.3s;
  text-align: left;
}
.choice-btn:hover {
  background: rgba(255, 107, 157, 0.25);
  border-color: var(--yn-pink);
  transform: translateX(4px);
}

/* ===== ENDING SCREEN ===== */
#ending-screen {
  background: radial-gradient(ellipse at center, #2d1050 0%, #1a0a2e 50%, #0d0518 100%);
  z-index: 60;
}
.ending-wrap {
  text-align: center;
  padding: 1.5rem;
  width: 90%;
  max-width: 440px;
  animation: fadeInUp 1s ease-out;
}
.ending-type {
  font-size: 0.8rem;
  color: var(--yn-gray);
  letter-spacing: 0.15em;
  text-transform: uppercase;
}
.ending-icon {
  font-size: 64px;
  margin: 0.8rem 0;
  filter: drop-shadow(0 0 20px var(--yn-pink-glow));
  animation: fadeInUp 0.8s 0.3s ease-out both;
}
.ending-title {
  font-family: var(--yn-font-title);
  font-size: clamp(1.3rem, 5vw, 2rem);
  color: var(--yn-pink);
  text-shadow: 0 0 20px var(--yn-pink-glow);
  animation: fadeInUp 0.8s 0.5s ease-out both;
}
.ending-desc {
  font-size: 0.85rem;
  line-height: 1.9;
  color: var(--yn-gray);
  margin-top: 1rem;
  text-align: left;
  animation: fadeInUp 0.8s 0.7s ease-out both;
}
.ending-affection {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  margin-top: 1.2rem;
  animation: fadeInUp 0.8s 0.9s ease-out both;
}
.ending-affection-label {
  font-size: 0.8rem;
  color: var(--yn-sakura);
}
.ending-hearts {
  font-size: 1.2rem;
  letter-spacing: 2px;
}
.ending-actions {
  margin-top: 1.5rem;
  display: flex;
  flex-direction: column;
  gap: 10px;
  align-items: center;
  animation: fadeInUp 0.8s 1.1s ease-out both;
}
.btn-share-ending {
  display: inline-block;
  padding: 12px 32px;
  font-family: var(--yn-font);
  font-size: 0.95rem;
  font-weight: 700;
  color: #fff;
  background: #000;
  border: 2px solid #555;
  border-radius: 50px;
  text-decoration: none;
  transition: all 0.3s;
}
.btn-share-ending:hover {
  background: #1a1a1a;
  border-color: #888;
}
.btn-retry {
  padding: 10px 28px;
  font-family: var(--yn-font);
  font-size: 0.85rem;
  font-weight: 700;
  color: var(--yn-white);
  background: transparent;
  border: 2px solid rgba(255, 107, 157, 0.4);
  border-radius: 50px;
  cursor: pointer;
  transition: all 0.3s;
}
.btn-retry:hover {
  background: rgba(255, 107, 157, 0.15);
  border-color: var(--yn-pink);
}

/* ===== GLITCH EFFECT (for stalker appearance) ===== */
.glitch-overlay {
  position: fixed;
  inset: 0;
  z-index: 200;
  pointer-events: none;
  display: none;
}
.glitch-overlay.active {
  display: block;
  animation: glitch 0.3s ease-out;
}
@keyframes glitch {
  0% { background: rgba(255, 0, 100, 0.3); }
  25% { background: rgba(0, 0, 0, 0.5); }
  50% { background: rgba(255, 0, 100, 0.15); }
  75% { background: transparent; }
  100% { background: transparent; }
}

/* ===== ANIMATIONS ===== */
@keyframes fadeInUp {
  from { opacity: 0; transform: translateY(20px); }
  to { opacity: 1; transform: translateY(0); }
}

/* ===== RESPONSIVE ===== */
@media (max-width: 480px) {
  .title-icon { font-size: 52px; }
  .location-grid { gap: 8px; }
  .location-btn { padding: 12px 6px; }
  .character-sprite { font-size: 80px; }
  .dialogue-inner { padding: 12px 14px 14px; }
  .ending-icon { font-size: 52px; }
}

@media (min-width: 769px) {
  .location-grid {
    max-width: 400px;
  }
}