/* ==========================================================================
   Romantic Apology Web App Design System & Stylesheet
   Theme: Soft Pink, Blush, Lavender, Cream, White Glassmorphism
   ========================================================================== */

@import url('https://fonts.googleapis.com/css2?family=Caveat:wght@600;700&family=Plus+Jakarta+Sans:wght@300;400;500;600;700;800&family=Sacramento&display=swap');

:root {
  --font-main: 'Plus Jakarta Sans', -apple-system, BlinkMacSystemFont, sans-serif;
  --font-handwriting: 'Caveat', 'Sacramento', cursive;
  
  /* Color Palette */
  --bg-gradient-1: #FFF7F9;
  --bg-gradient-2: #FFE6EE;
  --bg-gradient-3: #F3E8FF;
  --bg-cream: #FFFDF9;
  
  --primary-pink: #F43F5E;
  --primary-rose: #FB7185;
  --soft-pink: #FFE4E6;
  --blush: #FFD1DC;
  --lavender: #E9D5FF;
  --lavender-deep: #A855F7;
  --cream-white: #FFFFFF;
  
  --text-dark: #331825;
  --text-medium: #643A4C;
  --text-soft: #8C596F;
  --text-light: #A3798D;
  
  /* Glassmorphism System */
  --glass-bg: rgba(255, 255, 255, 0.55);
  --glass-bg-hover: rgba(255, 255, 255, 0.75);
  --glass-border: 1px solid rgba(255, 255, 255, 0.7);
  --glass-border-pink: 1px solid rgba(244, 63, 94, 0.2);
  --glass-shadow: 0 20px 40px -15px rgba(225, 29, 72, 0.12);
  --glass-shadow-hover: 0 25px 50px -12px rgba(225, 29, 72, 0.22);
  --glass-blur: blur(20px);
  
  --radius-lg: 32px;
  --radius-md: 24px;
  --radius-sm: 16px;
  --radius-full: 9999px;
  
  --transition-apple: all 0.4s cubic-bezier(0.16, 1, 0.3, 1);
}

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

html {
  scroll-behavior: smooth;
  font-size: 16px;
  -webkit-tap-highlight-color: transparent;
}

body {
  font-family: var(--font-main);
  background: linear-gradient(135deg, var(--bg-gradient-1) 0%, var(--bg-gradient-2) 40%, var(--bg-gradient-3) 100%);
  background-attachment: fixed;
  color: var(--text-dark);
  min-height: 100vh;
  overflow-x: hidden;
  line-height: 1.6;
  position: relative;
}

/* Canvas Background for Particle Systems (Petals, Hearts, Sparkles) */
#bgCanvas {
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  pointer-events: none;
  z-index: 1;
}

/* Floating Audio Toggle Button */
.audio-control-pill {
  position: fixed;
  top: 20px;
  right: 20px;
  z-index: 100;
  background: rgba(255, 255, 255, 0.75);
  backdrop-filter: var(--glass-blur);
  -webkit-backdrop-filter: var(--glass-blur);
  border: var(--glass-border);
  padding: 10px 18px;
  border-radius: var(--radius-full);
  display: flex;
  align-items: center;
  gap: 10px;
  cursor: pointer;
  box-shadow: 0 10px 25px rgba(225, 29, 72, 0.12);
  transition: var(--transition-apple);
}

.audio-control-pill:hover {
  transform: translateY(-2px) scale(1.03);
  background: rgba(255, 255, 255, 0.9);
  box-shadow: 0 14px 30px rgba(225, 29, 72, 0.2);
}

.audio-icon {
  font-size: 1.2rem;
}

.audio-text {
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--text-medium);
}

.sound-waves {
  display: flex;
  align-items: flex-end;
  gap: 2px;
  height: 14px;
}

.wave-bar {
  width: 3px;
  height: 100%;
  background: var(--primary-pink);
  border-radius: 2px;
  animation: wave 1.2s ease-in-out infinite alternate;
}

.wave-bar:nth-child(2) { animation-delay: 0.2s; }
.wave-bar:nth-child(3) { animation-delay: 0.4s; }

.audio-control-pill.muted .wave-bar {
  animation: none;
  height: 3px;
  opacity: 0.4;
}

@keyframes wave {
  0% { height: 4px; }
  100% { height: 14px; }
}

/* Main Container */
.app-viewport {
  position: relative;
  z-index: 10;
  max-width: 900px;
  margin: 0 auto;
  padding: 20px 20px 80px 20px;
}

/* Floating Stickers Container */
.stickers-wrapper {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
  z-index: 2;
  overflow: hidden;
}

.sticker {
  position: absolute;
  pointer-events: auto;
  background: rgba(255, 255, 255, 0.65);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border: 1px solid rgba(255, 255, 255, 0.8);
  padding: 8px 16px;
  border-radius: var(--radius-full);
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--text-dark);
  box-shadow: 0 10px 20px rgba(225, 29, 72, 0.08);
  user-select: none;
  cursor: pointer;
  transition: transform 0.3s cubic-bezier(0.34, 1.56, 0.64, 1), background 0.3s;
  animation: floatSticker 6s ease-in-out infinite alternate;
}

.sticker:hover {
  transform: scale(1.15) rotate(4deg) !important;
  background: rgba(255, 255, 255, 0.95);
  box-shadow: 0 15px 30px rgba(225, 29, 72, 0.2);
  z-index: 50;
}

/* Sticker Floating Keyframe Variations */
@keyframes floatSticker {
  0% { transform: translateY(0px) rotate(0deg); }
  50% { transform: translateY(-12px) rotate(3deg); }
  100% { transform: translateY(6px) rotate(-2deg); }
}

/* Glassmorphism Card Component */
.glass-card {
  background: var(--glass-bg);
  backdrop-filter: var(--glass-blur);
  -webkit-backdrop-filter: var(--glass-blur);
  border: var(--glass-border);
  border-radius: var(--radius-lg);
  padding: 40px;
  margin-bottom: 50px;
  box-shadow: var(--glass-shadow);
  transition: var(--transition-apple);
  position: relative;
  overflow: hidden;
}

.glass-card:hover {
  box-shadow: var(--glass-shadow-hover);
}

.glass-card::before {
  content: '';
  position: absolute;
  top: -50%;
  left: -50%;
  width: 200%;
  height: 200%;
  background: radial-gradient(circle, rgba(255,255,255,0.4) 0%, transparent 60%);
  pointer-events: none;
  opacity: 0.6;
}

/* Scroll Fade Animation */
.reveal-on-scroll {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.8s cubic-bezier(0.16, 1, 0.3, 1), transform 0.8s cubic-bezier(0.16, 1, 0.3, 1);
}

.reveal-on-scroll.visible {
  opacity: 1;
  transform: translateY(0);
}

/* Section Title & Badges */
.section-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 18px;
  background: rgba(244, 63, 94, 0.1);
  border: 1px solid rgba(244, 63, 94, 0.2);
  border-radius: var(--radius-full);
  color: var(--primary-pink);
  font-size: 0.85rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 1px;
  margin-bottom: 16px;
}

.section-title {
  font-size: 2.2rem;
  font-weight: 800;
  color: var(--text-dark);
  text-align: center;
  margin-bottom: 12px;
  letter-spacing: -0.5px;
}

.section-subtitle {
  text-align: center;
  color: var(--text-soft);
  font-size: 1.05rem;
  margin-bottom: 40px;
}

/* ==========================================================================
   Hero Section
   ========================================================================== */
.hero-section {
  min-height: 85vh;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: 60px 20px;
  position: relative;
}

.animated-heart-wrapper {
  position: relative;
  margin-bottom: 30px;
  cursor: pointer;
}

.glowing-heart-svg {
  width: 110px;
  height: 110px;
  filter: drop-shadow(0 10px 25px rgba(244, 63, 94, 0.4));
  animation: heartPulse 1.8s ease-in-out infinite;
  transition: transform 0.3s;
}

.animated-heart-wrapper:hover .glowing-heart-svg {
  transform: scale(1.15);
}

@keyframes heartPulse {
  0% { transform: scale(1); filter: drop-shadow(0 10px 20px rgba(244, 63, 94, 0.3)); }
  15% { transform: scale(1.12); filter: drop-shadow(0 15px 30px rgba(244, 63, 94, 0.5)); }
  30% { transform: scale(1); filter: drop-shadow(0 10px 20px rgba(244, 63, 94, 0.3)); }
  45% { transform: scale(1.08); filter: drop-shadow(0 12px 25px rgba(244, 63, 94, 0.4)); }
  100% { transform: scale(1); filter: drop-shadow(0 10px 20px rgba(244, 63, 94, 0.3)); }
}

.hero-heading {
  font-size: clamp(2rem, 5vw, 3.2rem);
  font-weight: 800;
  line-height: 1.25;
  background: linear-gradient(135deg, #331825 0%, #E11D48 60%, #9333EA 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  margin-bottom: 20px;
  max-width: 800px;
  letter-spacing: -0.8px;
}

.hero-subtext {
  font-size: clamp(1.05rem, 2.5vw, 1.25rem);
  color: var(--text-medium);
  max-width: 640px;
  margin: 0 auto 36px auto;
  font-weight: 400;
  line-height: 1.7;
}

/* Glowing Apple-style Buttons */
.btn-glowing {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 12px;
  background: linear-gradient(135deg, #F43F5E 0%, #E11D48 50%, #D946EF 100%);
  color: #FFFFFF;
  padding: 16px 36px;
  border-radius: var(--radius-full);
  font-size: 1.1rem;
  font-weight: 700;
  text-decoration: none;
  border: none;
  cursor: pointer;
  box-shadow: 0 12px 30px rgba(244, 63, 94, 0.35);
  transition: var(--transition-apple);
  position: relative;
  overflow: hidden;
}

.btn-glowing::after {
  content: '';
  position: absolute;
  top: 0; left: 0; width: 100%; height: 100%;
  background: linear-gradient(90deg, transparent, rgba(255,255,255,0.3), transparent);
  transform: translateX(-100%);
  transition: transform 0.6s;
}

.btn-glowing:hover {
  transform: translateY(-3px) scale(1.03);
  box-shadow: 0 18px 40px rgba(244, 63, 94, 0.5);
}

.btn-glowing:hover::after {
  transform: translateX(100%);
}

.btn-glowing:active {
  transform: translateY(-1px) scale(0.98);
}

/* ==========================================================================
   Apology Letter Section
   ========================================================================== */
.letter-card {
  background: rgba(255, 255, 255, 0.75);
  border: 1px solid rgba(255, 255, 255, 0.9);
  padding: 50px 40px;
  border-radius: var(--radius-lg);
  box-shadow: 0 25px 60px -15px rgba(225, 29, 72, 0.15);
  position: relative;
}

.letter-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 24px;
  border-bottom: 1px dashed rgba(244, 63, 94, 0.2);
  padding-bottom: 16px;
}

.letter-stamp {
  font-family: var(--font-handwriting);
  font-size: 1.6rem;
  color: var(--primary-pink);
  font-weight: 700;
  display: flex;
  align-items: center;
  gap: 6px;
}

.typewriter-controls {
  display: flex;
  gap: 10px;
}

.btn-icon-small {
  background: rgba(244, 63, 94, 0.1);
  border: 1px solid rgba(244, 63, 94, 0.2);
  color: var(--primary-pink);
  padding: 6px 14px;
  border-radius: var(--radius-full);
  font-size: 0.8rem;
  font-weight: 600;
  cursor: pointer;
  transition: var(--transition-apple);
}

.btn-icon-small:hover {
  background: var(--primary-pink);
  color: white;
}

.letter-content {
  font-size: 1.15rem;
  color: var(--text-dark);
  line-height: 1.85;
  white-space: pre-wrap;
  min-height: 380px;
  position: relative;
}

.typewriter-cursor {
  display: inline-block;
  width: 2px;
  height: 1.2em;
  background-color: var(--primary-pink);
  vertical-align: middle;
  margin-left: 2px;
  animation: blink 0.8s infinite;
}

@keyframes blink {
  0%, 100% { opacity: 1; }
  50% { opacity: 0; }
}

.signature-block {
  margin-top: 30px;
  font-family: var(--font-handwriting);
  font-size: 2.2rem;
  color: var(--primary-pink);
  text-align: right;
  line-height: 1.2;
}

/* ==========================================================================
   Reasons I Love You Section
   ========================================================================== */
.reasons-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 20px;
  margin-top: 20px;
}

.reason-card {
  background: rgba(255, 255, 255, 0.6);
  backdrop-filter: var(--glass-blur);
  -webkit-backdrop-filter: var(--glass-blur);
  border: var(--glass-border);
  border-radius: var(--radius-md);
  padding: 28px 24px;
  display: flex;
  align-items: center;
  gap: 16px;
  box-shadow: 0 10px 25px rgba(225, 29, 72, 0.06);
  transition: var(--transition-apple);
  cursor: pointer;
}

.reason-card:hover {
  transform: translateY(-5px) scale(1.02);
  background: rgba(255, 255, 255, 0.85);
  box-shadow: 0 20px 40px rgba(225, 29, 72, 0.15);
  border-color: rgba(244, 63, 94, 0.3);
}

.reason-icon {
  font-size: 2rem;
  flex-shrink: 0;
  width: 54px;
  height: 54px;
  background: rgba(254, 226, 226, 0.6);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 5px 12px rgba(244, 63, 94, 0.12);
}

.reason-text {
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--text-dark);
}

/* ==========================================================================
   My Promise Section
   ========================================================================== */
.promise-list {
  display: flex;
  flex-direction: column;
  gap: 16px;
  margin-top: 20px;
}

.promise-card {
  background: rgba(255, 255, 255, 0.65);
  backdrop-filter: var(--glass-blur);
  -webkit-backdrop-filter: var(--glass-blur);
  border: var(--glass-border);
  border-radius: var(--radius-md);
  padding: 22px 30px;
  display: flex;
  align-items: center;
  gap: 20px;
  box-shadow: 0 8px 20px rgba(225, 29, 72, 0.05);
  transition: var(--transition-apple);
}

.promise-card:hover {
  transform: translateX(8px);
  background: rgba(255, 255, 255, 0.9);
  box-shadow: 0 15px 30px rgba(225, 29, 72, 0.12);
  border-left: 4px solid var(--primary-pink);
}

.promise-heart {
  font-size: 1.5rem;
  color: var(--primary-pink);
  animation: heartPulse 2s ease-in-out infinite;
}

.promise-text {
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--text-dark);
}

/* ==========================================================================
   Photo Gallery (Polaroid Frames)
   ========================================================================== */
.polaroid-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 30px;
  margin-top: 30px;
  padding: 10px;
}

.polaroid-card {
  background: #FFFFFF;
  padding: 16px 16px 24px 16px;
  border-radius: 4px;
  box-shadow: 0 15px 35px rgba(0, 0, 0, 0.08), 0 5px 15px rgba(225, 29, 72, 0.05);
  transition: var(--transition-apple);
  position: relative;
  cursor: pointer;
  transform: rotate(var(--rotation, 0deg));
}

.polaroid-card:nth-child(1) { --rotation: -3deg; }
.polaroid-card:nth-child(2) { --rotation: 2deg; }
.polaroid-card:nth-child(3) { --rotation: -2deg; }
.polaroid-card:nth-child(4) { --rotation: 3deg; }

.polaroid-card:hover {
  transform: scale(1.06) rotate(0deg) !important;
  box-shadow: 0 25px 50px rgba(225, 29, 72, 0.2);
  z-index: 20;
}

.polaroid-tape {
  position: absolute;
  top: -12px;
  left: 50%;
  transform: translateX(-50%);
  width: 90px;
  height: 26px;
  background: rgba(255, 255, 255, 0.7);
  box-shadow: 0 2px 5px rgba(0,0,0,0.05);
  border: 1px solid rgba(0,0,0,0.03);
  backdrop-filter: blur(4px);
  z-index: 5;
}

.polaroid-img-wrapper {
  width: 100%;
  height: 240px;
  overflow: hidden;
  border-radius: 2px;
  background: #F3F4F6;
  position: relative;
}

.polaroid-img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.6s ease;
}

.polaroid-card:hover .polaroid-img {
  transform: scale(1.08);
}

.polaroid-caption {
  font-family: var(--font-handwriting);
  font-size: 1.5rem;
  color: var(--text-dark);
  text-align: center;
  margin-top: 14px;
  font-weight: 700;
}

/* Lightbox Modal */
.lightbox-modal {
  position: fixed;
  top: 0; left: 0; width: 100vw; height: 100vh;
  background: rgba(30, 10, 20, 0.75);
  backdrop-filter: blur(15px);
  -webkit-backdrop-filter: blur(15px);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 1000;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.4s ease;
}

.lightbox-modal.active {
  opacity: 1;
  pointer-events: auto;
}

.lightbox-content {
  background: white;
  padding: 20px 20px 30px 20px;
  border-radius: var(--radius-md);
  max-width: 500px;
  width: 90%;
  text-align: center;
  box-shadow: 0 30px 60px rgba(0,0,0,0.3);
  transform: scale(0.9);
  transition: transform 0.4s cubic-bezier(0.16, 1, 0.3, 1);
  position: relative;
}

.lightbox-modal.active .lightbox-content {
  transform: scale(1);
}

.lightbox-img {
  width: 100%;
  max-height: 400px;
  object-fit: cover;
  border-radius: var(--radius-sm);
}

.lightbox-caption {
  font-family: var(--font-handwriting);
  font-size: 1.8rem;
  color: var(--primary-pink);
  margin-top: 15px;
}

.lightbox-close {
  position: absolute;
  top: -15px;
  right: -15px;
  width: 36px;
  height: 36px;
  background: var(--primary-pink);
  color: white;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.2rem;
  cursor: pointer;
  border: none;
  box-shadow: 0 5px 15px rgba(0,0,0,0.2);
}

/* ==========================================================================
   Final Section & Can We Talk? CTA
   ========================================================================== */
.final-section {
  text-align: center;
  padding: 60px 30px;
}

.final-heart-wrapper {
  margin-bottom: 30px;
}

.final-heart-svg {
  width: 130px;
  height: 130px;
  filter: drop-shadow(0 15px 35px rgba(244, 63, 94, 0.5));
  animation: heartPulse 1.6s ease-in-out infinite;
}

.final-text {
  font-size: 1.25rem;
  color: var(--text-medium);
  line-height: 2;
  margin-bottom: 40px;
  font-weight: 500;
}

.final-highlight-names {
  font-family: var(--font-handwriting);
  font-size: 2.2rem;
  color: var(--primary-pink);
  margin: 20px 0;
  line-height: 1.4;
}

.btn-can-we-talk {
  font-size: 1.25rem;
  padding: 20px 48px;
  background: linear-gradient(135deg, #F43F5E 0%, #E11D48 50%, #9333EA 100%);
  box-shadow: 0 15px 40px rgba(244, 63, 94, 0.45);
}

.btn-can-we-talk:hover {
  transform: translateY(-4px) scale(1.05);
  box-shadow: 0 22px 50px rgba(244, 63, 94, 0.6);
}

/* Emotional Response Popup Modal */
.response-modal {
  position: fixed;
  top: 0; left: 0; width: 100vw; height: 100vh;
  background: rgba(30, 10, 20, 0.7);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 2000;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.4s ease;
}

.response-modal.active {
  opacity: 1;
  pointer-events: auto;
}

.response-card {
  background: rgba(255, 255, 255, 0.95);
  border-radius: var(--radius-lg);
  padding: 40px;
  max-width: 480px;
  width: 90%;
  text-align: center;
  box-shadow: 0 30px 60px rgba(244, 63, 94, 0.3);
  transform: scale(0.85);
  transition: transform 0.4s cubic-bezier(0.16, 1, 0.3, 1);
  border: 1px solid rgba(255, 255, 255, 0.8);
}

.response-modal.active .response-card {
  transform: scale(1);
}

.response-emoji {
  font-size: 3.5rem;
  margin-bottom: 16px;
  display: inline-block;
  animation: bounce 1.5s infinite;
}

@keyframes bounce {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-10px); }
}

.response-title {
  font-size: 1.8rem;
  font-weight: 800;
  color: var(--text-dark);
  margin-bottom: 12px;
}

.response-message {
  font-size: 1.05rem;
  color: var(--text-medium);
  margin-bottom: 28px;
  line-height: 1.6;
}

.response-actions {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

/* Responsive Rules for Mobile */
@media (max-width: 640px) {
  .app-viewport {
    padding: 15px 15px 60px 15px;
  }
  
  .glass-card {
    padding: 24px 20px;
    margin-bottom: 30px;
    border-radius: var(--radius-md);
  }
  
  .hero-section {
    min-height: 75vh;
    padding: 40px 10px;
  }
  
  .hero-heading {
    font-size: 1.9rem;
  }
  
  .hero-subtext {
    font-size: 1rem;
  }
  
  .btn-glowing {
    padding: 14px 28px;
    font-size: 1rem;
  }

  .letter-card {
    padding: 30px 20px;
  }
  
  .letter-content {
    font-size: 1rem;
    line-height: 1.7;
  }
  
  .polaroid-grid {
    grid-template-columns: 1fr;
    gap: 24px;
  }
  
  .sticker {
    padding: 6px 12px;
    font-size: 0.8rem;
  }
}