/* ══════════════════════════════════════════
   CSS Variables & Reset
══════════════════════════════════════════ */
:root {
  --black:       #05020d;
  --deep:        #0d0820;
  --void:        #080514;
  --purple-900:  #1a0a2e;
  --purple-800:  #2d1254;
  --purple-700:  #4a1e8a;
  --purple-600:  #6b35b8;
  --purple-500:  #8b5cf6;
  --purple-400:  #a78bfa;
  --purple-300:  #c4b5fd;
  --purple-200:  #ddd6fe;
  --gold:        #c9a84c;
  --gold-light:  #f0d080;
  --cream:       #f5f0e8;
  --white:       #ffffff;

  --font-display: 'Cinzel', serif;
  --font-serif:   'Cormorant Garamond', serif;
  --font-sans:    'Raleway', sans-serif;

  --transition-page: 0.9s cubic-bezier(0.76, 0, 0.24, 1);
  --transition-el:   0.4s cubic-bezier(0.34, 1.56, 0.64, 1);
}

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

html { scroll-behavior: smooth; }

body {
  background: var(--black);
  color: var(--cream);
  font-family: var(--font-sans);
  overflow: hidden;
  height: 100vh;
  width: 100vw;
  cursor: default;
}

/* ══════════════════════════════════════════
   Particles Canvas
══════════════════════════════════════════ */
#particles {
  position: fixed;
  inset: 0;
  z-index: 0;
  pointer-events: none;
}

/* ══════════════════════════════════════════
   Noise Overlay
══════════════════════════════════════════ */
.noise-overlay {
  position: absolute;
  inset: 0;
  z-index: 1;
  opacity: 0.035;
  pointer-events: none;
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 256 256' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
  background-size: 200px 200px;
}

/* ══════════════════════════════════════════
   Page Transition Overlay
══════════════════════════════════════════ */
#transition-overlay {
  position: fixed;
  inset: 0;
  z-index: 1000;
  pointer-events: none;
  display: flex;
  align-items: center;
  justify-content: center;
}

.transition-content {
  width: 0;
  height: 0;
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
}

.transition-orb {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: radial-gradient(circle, var(--purple-400), var(--purple-800));
  transform: scale(0);
  box-shadow: 0 0 60px var(--purple-500), 0 0 120px var(--purple-700);
  transition: transform var(--transition-page);
}

body.transitioning .transition-orb {
  transform: scale(300);
}

/* ══════════════════════════════════════════
   Pages
══════════════════════════════════════════ */
.page {
  position: fixed;
  inset: 0;
  z-index: 10;
  overflow-y: auto;
  overflow-x: hidden;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.4s ease;
  display: flex;
  align-items: flex-start;
  justify-content: center;
}

.page.active {
  opacity: 1;
  pointer-events: all;
}

.page-inner {
  position: relative;
  z-index: 2;
  width: 100%;
  max-width: 680px;
  padding: 60px 32px 80px;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 40px;
  min-height: 100vh;
}

/* ══════════════════════════════════════════
   PAGE 1 — BIRTHDAY
══════════════════════════════════════════ */
#page-birthday {
  background:
    radial-gradient(ellipse 80% 60% at 50% -10%, var(--purple-800) 0%, transparent 70%),
    radial-gradient(ellipse 60% 40% at 80% 100%, #1a0640 0%, transparent 60%),
    var(--void);
}

/* Decorative rings */
.deco-ring {
  position: absolute;
  border-radius: 50%;
  border: 1px solid var(--purple-700);
  opacity: 0.15;
  animation: rotate-ring 20s linear infinite;
  pointer-events: none;
}
.ring-1 { width: 600px; height: 600px; top: -200px; right: -200px; animation-duration: 25s; }
.ring-2 { width: 400px; height: 400px; bottom: -100px; left: -150px; animation-direction: reverse; animation-duration: 18s; }
.ring-3 { width: 200px; height: 200px; top: 40%; left: 5%; border-color: var(--gold); opacity: 0.08; }

@keyframes rotate-ring {
  from { transform: rotate(0deg); }
  to   { transform: rotate(360deg); }
}

/* Birthday header */
.birthday-header {
  text-align: center;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 12px;
  animation: fade-up 1s ease both;
  animation-delay: 0.3s;
}

.eyebrow {
  font-family: var(--font-sans);
  font-weight: 200;
  font-size: 0.75rem;
  letter-spacing: 0.35em;
  text-transform: uppercase;
  color: var(--purple-400);
}

.recipient-name {
  font-family: var(--font-display);
  font-size: clamp(2.8rem, 8vw, 5rem);
  font-weight: 600;
  letter-spacing: 0.05em;
  background: linear-gradient(135deg, var(--purple-300) 0%, var(--gold-light) 50%, var(--purple-200) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  line-height: 1.1;
}

.date-badge {
  font-family: var(--font-serif);
  font-style: italic;
  font-size: 1rem;
  color: var(--purple-400);
  border: 1px solid var(--purple-700);
  padding: 4px 20px;
  border-radius: 100px;
  letter-spacing: 0.1em;
}

/* ——— CSS Cake ——— */
.cake-container {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  animation: fade-up 1s ease both;
  animation-delay: 0.5s;
}

.cake-glow {
  position: absolute;
  width: 200px;
  height: 120px;
  background: radial-gradient(ellipse, var(--purple-600) 0%, transparent 70%);
  opacity: 0.4;
  bottom: -10px;
  filter: blur(20px);
}

.cake {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0;
}

.cake-top {
  display: flex;
  flex-direction: column;
  align-items: center;
  width: 120px;
}

.candles {
  display: flex;
  gap: 12px;
  margin-bottom: 0;
  position: relative;
  z-index: 5;
}

.candle {
  width: 8px;
  height: 32px;
  background: linear-gradient(to bottom, var(--purple-400), var(--purple-700));
  border-radius: 2px 2px 0 0;
  position: relative;
  display: flex;
  flex-direction: column;
  align-items: center;
}

.flame {
  position: absolute;
  top: -14px;
  width: 10px;
  height: 16px;
  display: flex;
  align-items: flex-end;
  justify-content: center;
}

.flame::before {
  content: '';
  position: absolute;
  width: 10px;
  height: 16px;
  background: radial-gradient(ellipse at 50% 80%, #fff 0%, var(--gold-light) 40%, #ff8c00 70%, transparent 100%);
  border-radius: 50% 50% 20% 20%;
  animation: flicker 1.2s ease-in-out infinite alternate;
  transform-origin: bottom center;
}

.flame-inner {
  width: 5px;
  height: 8px;
  background: radial-gradient(ellipse, white 0%, rgba(255,255,200,0.8) 100%);
  border-radius: 50% 50% 20% 20%;
  position: absolute;
  bottom: 2px;
  animation: flicker 0.8s ease-in-out infinite alternate-reverse;
  transform-origin: bottom center;
}

@keyframes flicker {
  0%   { transform: scaleX(1) scaleY(1) rotate(-2deg); opacity: 1; }
  100% { transform: scaleX(0.85) scaleY(1.1) rotate(2deg); opacity: 0.9; }
}

.frosting-top {
  width: 140px;
  height: 14px;
  background: linear-gradient(to bottom, var(--purple-300), var(--purple-500));
  border-radius: 12px 12px 0 0;
  position: relative;
  z-index: 4;
}

.frosting-top::after {
  content: '';
  position: absolute;
  bottom: -6px;
  left: 0;
  right: 0;
  height: 12px;
  background: var(--purple-500);
  clip-path: polygon(0% 0%, 7% 100%, 14% 0%, 21% 100%, 28% 0%, 35% 100%, 42% 0%, 49% 100%, 56% 0%, 63% 100%, 70% 0%, 77% 100%, 84% 0%, 91% 100%, 98% 0%, 100% 0%, 100% 100%, 0% 100%);
}

.cake-middle {
  width: 160px;
  height: 56px;
  background: linear-gradient(to bottom, var(--purple-800), var(--purple-900));
  border: 1px solid var(--purple-600);
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
}

.cake-deco {
  font-size: 0.7rem;
  letter-spacing: 0.3em;
  color: var(--purple-400);
  opacity: 0.6;
}

.cake-bottom {
  width: 180px;
  height: 40px;
  background: linear-gradient(to bottom, var(--purple-700), var(--purple-900));
  border: 1px solid var(--purple-600);
  border-radius: 0 0 4px 4px;
  display: flex;
  align-items: flex-end;
  justify-content: center;
}

.cake-plate {
  width: 200px;
  height: 10px;
  background: linear-gradient(to bottom, var(--purple-600), var(--purple-800));
  border-radius: 50%;
  margin-bottom: 0;
  box-shadow: 0 4px 20px rgba(107, 53, 184, 0.4);
}

/* Birthday messages */
.birthday-messages {
  text-align: center;
  animation: fade-up 1s ease both;
  animation-delay: 0.7s;
}

.messages-inner {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.message-line {
  font-family: var(--font-serif);
  font-size: clamp(1rem, 2.5vw, 1.2rem);
  font-weight: 300;
  font-style: italic;
  color: var(--purple-200);
  line-height: 1.6;
  opacity: 0;
  transform: translateY(10px);
  animation: fade-up 0.6s ease forwards;
}

/* Age display */
.age-display {
  display: flex;
  align-items: baseline;
  gap: 12px;
  animation: fade-up 1s ease both;
  animation-delay: 1.2s;
}

.age-number {
  font-family: var(--font-display);
  font-size: clamp(4rem, 12vw, 7rem);
  font-weight: 600;
  background: linear-gradient(135deg, var(--purple-400), var(--gold-light));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  line-height: 1;
  transition: all 0.1s ease;
}

.age-label {
  font-family: var(--font-sans);
  font-weight: 200;
  font-size: 0.8rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--purple-400);
}

/* Next button */
.btn-next {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
  background: none;
  border: 1px solid var(--purple-600);
  color: var(--purple-300);
  padding: 20px 40px;
  cursor: pointer;
  font-family: var(--font-sans);
  font-size: 0.8rem;
  font-weight: 300;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  transition: all 0.3s ease;
  position: relative;
  overflow: hidden;
  animation: fade-up 1s ease both;
  animation-delay: 1.5s;
}

.btn-next::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, var(--purple-700), var(--purple-900));
  transform: translateY(100%);
  transition: transform 0.4s cubic-bezier(0.4, 0, 0.2, 1);
}

.btn-next:hover::before { transform: translateY(0); }
.btn-next:hover { border-color: var(--purple-400); color: var(--white); }
.btn-next .btn-text { position: relative; z-index: 1; }

.btn-arrow {
  position: relative;
  z-index: 1;
  font-size: 1.2rem;
  animation: bounce-down 2s ease infinite;
}

@keyframes bounce-down {
  0%, 100% { transform: translateY(0); }
  50%       { transform: translateY(4px); }
}

/* ══════════════════════════════════════════
   PAGE 2 — LOVE CONFESSION
══════════════════════════════════════════ */
#page-love {
  background:
    radial-gradient(ellipse 70% 50% at 50% 110%, var(--purple-800) 0%, transparent 70%),
    radial-gradient(ellipse 50% 40% at 10% 0%, #1a0640 0%, transparent 60%),
    var(--black);
}

/* Deco lines */
.love-deco-left,
.love-deco-right {
  position: fixed;
  top: 0;
  bottom: 0;
  width: 1px;
  background: linear-gradient(to bottom, transparent, var(--purple-700) 30%, var(--purple-700) 70%, transparent);
  opacity: 0.15;
  pointer-events: none;
  z-index: 1;
}
.love-deco-left  { left: clamp(20px, 5vw, 60px); }
.love-deco-right { right: clamp(20px, 5vw, 60px); }

/* Hearts */
.hearts-container {
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 1;
  overflow: hidden;
}

.floating-heart {
  position: absolute;
  bottom: -50px;
  opacity: 0;
  animation: float-heart linear forwards;
  font-size: 1rem;
  color: var(--purple-500);
  filter: drop-shadow(0 0 4px var(--purple-600));
}

@keyframes float-heart {
  0%   { transform: translateY(0) rotate(0deg); opacity: 0; }
  10%  { opacity: 0.6; }
  90%  { opacity: 0.3; }
  100% { transform: translateY(-110vh) rotate(360deg); opacity: 0; }
}

/* Love header */
.love-header {
  text-align: center;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 20px;
  animation: fade-up 1s ease both;
  animation-delay: 0.2s;
}

.love-icon {
  width: 70px;
  height: 70px;
  position: relative;
}

.love-icon svg {
  width: 100%;
  height: 100%;
  fill: none;
  stroke: var(--purple-500);
  stroke-width: 2;
  filter: drop-shadow(0 0 12px var(--purple-600));
  animation: heart-pulse 2s ease-in-out infinite;
}

.love-icon svg path {
  fill: var(--purple-900);
  stroke: var(--purple-400);
}

@keyframes heart-pulse {
  0%, 100% { transform: scale(1); filter: drop-shadow(0 0 12px var(--purple-600)); }
  50%       { transform: scale(1.08); filter: drop-shadow(0 0 20px var(--purple-500)); }
}

.love-title {
  font-family: var(--font-display);
  font-size: clamp(1.2rem, 4vw, 1.8rem);
  font-weight: 400;
  letter-spacing: 0.08em;
  color: var(--purple-200);
}

/* Confession block */
.confession-block {
  width: 100%;
  max-width: 520px;
  position: relative;
  animation: fade-up 1s ease both;
  animation-delay: 0.4s;
}

.confession-block::before,
.confession-block::after {
  content: '';
  position: absolute;
  left: 0;
  right: 0;
  height: 1px;
  background: linear-gradient(to right, transparent, var(--purple-600), transparent);
}
.confession-block::before { top: 0; }
.confession-block::after  { bottom: 0; }

.confession-lines {
  padding: 32px 24px;
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.confession-line {
  font-family: var(--font-serif);
  font-size: clamp(1rem, 2.5vw, 1.2rem);
  font-weight: 300;
  line-height: 1.7;
  color: var(--purple-200);
  text-align: center;
  opacity: 0;
  transform: translateY(8px);
  animation: fade-up 0.7s ease forwards;
}

.confession-line.empty {
  height: 16px;
}

/* Question block */
.question-block {
  text-align: center;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 28px;
  animation: fade-up 1s ease both;
  animation-delay: 0.6s;
}

.question-text {
  font-family: var(--font-display);
  font-size: clamp(1.1rem, 3.5vw, 1.5rem);
  font-weight: 600;
  letter-spacing: 0.05em;
  color: var(--purple-300);
  text-shadow: 0 0 30px var(--purple-600);
}

.answer-buttons {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
  justify-content: center;
}

.btn-answer {
  padding: 14px 36px;
  border: none;
  cursor: pointer;
  font-family: var(--font-sans);
  font-size: 0.85rem;
  font-weight: 300;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  transition: all 0.3s ease;
  position: relative;
  overflow: hidden;
}

.btn-yes {
  background: linear-gradient(135deg, var(--purple-700), var(--purple-500));
  color: var(--white);
  box-shadow: 0 4px 24px rgba(107, 53, 184, 0.5);
}

.btn-yes:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 32px rgba(107, 53, 184, 0.7);
}

.btn-no {
  background: transparent;
  color: var(--purple-400);
  border: 1px solid var(--purple-700);
}

.btn-no:hover {
  border-color: var(--purple-500);
  background: rgba(107, 53, 184, 0.1);
}

/* Response block */
.response-block {
  text-align: center;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 20px;
  animation: fade-up 0.8s ease both;
}

.response-block.hidden {
  display: none;
}

.response-text {
  font-family: var(--font-serif);
  font-size: clamp(1.1rem, 3vw, 1.4rem);
  font-style: italic;
  color: var(--purple-200);
  line-height: 1.7;
  max-width: 400px;
}

.response-stars {
  font-size: 1.4rem;
  letter-spacing: 0.4em;
  animation: twinkle 2s ease infinite;
}

@keyframes twinkle {
  0%, 100% { opacity: 1; }
  50%       { opacity: 0.5; }
}

/* Back button */
.btn-back {
  background: none;
  border: none;
  color: var(--purple-600);
  cursor: pointer;
  font-family: var(--font-sans);
  font-size: 0.75rem;
  font-weight: 200;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  padding: 8px 16px;
  transition: color 0.3s ease;
  margin-top: auto;
}

.btn-back:hover { color: var(--purple-400); }

/* ══════════════════════════════════════════
   Shared Animations
══════════════════════════════════════════ */
@keyframes fade-up {
  from { opacity: 0; transform: translateY(18px); }
  to   { opacity: 1; transform: translateY(0); }
}

/* ══════════════════════════════════════════
   Scrollbar
══════════════════════════════════════════ */
::-webkit-scrollbar { width: 4px; }
::-webkit-scrollbar-track { background: var(--black); }
::-webkit-scrollbar-thumb { background: var(--purple-700); border-radius: 2px; }

/* ══════════════════════════════════════════
   Responsive
══════════════════════════════════════════ */
@media (max-width: 480px) {
  .page-inner { padding: 40px 20px 60px; gap: 28px; }
  .answer-buttons { flex-direction: column; align-items: center; }
  .btn-answer { width: 200px; text-align: center; }
}