/* =========================================================
   Wish — Global Styles
   Personalized, shareable Birthday Surprise Creator.
   Built on the original visual system (dark-purple gradient,
   pink/lavender accents). Occasion-agnostic tokens live in
   :root so future wish types can re-theme by swapping them.
   ========================================================= */

/* ---------- 1. Design Tokens ---------- */
:root {
  /* Occasion theme — swap these to re-skin for other occasions */
  --color-bg-deep: #150725;
  --color-bg: #1b0b2e;
  --color-bg-soft: #2a1150;
  --color-accent-pink: #ff6ec7;
  --color-accent-pink-soft: #ffa6dc;
  --color-accent-lavender: #b98cff;
  --color-accent-lavender-soft: #d9c2ff;
  --color-text: #f4eeff;
  --color-text-muted: #c3b3e0;
  --color-paper: #fbf6ff;
  --color-paper-ink: #3a2352;

  --shadow-glow-pink: 0 0 24px rgba(255, 110, 199, 0.55);
  --shadow-glow-lavender: 0 0 30px rgba(185, 140, 255, 0.45);
  --shadow-card: 0 24px 60px rgba(0, 0, 0, 0.45);

  --radius-pill: 999px;
  --radius-card: 24px;
  --radius-field: 14px;

  --font-display: "Playfair Display", Georgia, serif;
  --font-body: "Poppins", system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;

  --transition-smooth: 400ms cubic-bezier(0.22, 1, 0.36, 1);
  --max-width: 560px;
}

/* ---------- 2. Reset & Base ---------- */
*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  min-height: 100vh;
  font-family: var(--font-body);
  color: var(--color-text);
  background:
    radial-gradient(1200px 700px at 80% -10%, var(--color-bg-soft) 0%, transparent 60%),
    radial-gradient(900px 600px at 10% 110%, rgba(185, 140, 255, 0.18) 0%, transparent 55%),
    linear-gradient(180deg, var(--color-bg-deep) 0%, var(--color-bg) 55%, var(--color-bg-deep) 100%);
  background-attachment: fixed;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

/* Utility: accessible screen-reader-only text */
.visually-hidden {
  position: absolute !important;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

/* ---------- 3. Layout ---------- */
.page {
  position: relative;
  z-index: 1;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

.view {
  flex: 1;
  display: none;
  align-items: center;
  justify-content: center;
  padding: 3rem 1.25rem;
}

.view.is-active {
  display: flex;
}

/* Step views inside recipient mode */
.step {
  display: none;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  gap: 1.25rem;
  width: 100%;
  animation: rise-in 700ms cubic-bezier(0.22, 1, 0.36, 1) both;
}

.step.is-active {
  display: flex;
}

/* Full-viewport animated backdrop canvas */
.backdrop-canvas {
  position: fixed;
  inset: 0;
  width: 100%;
  height: 100%;
  z-index: 0;
  pointer-events: none;
}

/* ---------- 4. Typography ---------- */
.eyebrow {
  margin: 0 0 0.5rem;
  letter-spacing: 0.5em;
  text-transform: uppercase;
  font-size: clamp(0.7rem, 2vw, 0.8rem);
  font-weight: 500;
  color: var(--color-accent-lavender-soft);
  text-indent: 0.5em;
}

.view__title {
  margin: 0 0 0.75rem;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(1.9rem, 6vw, 3rem);
  line-height: 1.12;
  background: linear-gradient(
    100deg,
    var(--color-text) 0%,
    var(--color-accent-pink-soft) 45%,
    var(--color-accent-lavender-soft) 100%
  );
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.view__title--sm {
  font-size: clamp(1.5rem, 5vw, 2.1rem);
}

.view__subtitle {
  margin: 0 auto 1.75rem;
  max-width: 34rem;
  font-size: clamp(0.95rem, 2.4vw, 1.05rem);
  font-weight: 300;
  color: var(--color-text-muted);
}

.step__hint {
  margin: 0;
  font-size: clamp(0.95rem, 2.4vw, 1.05rem);
  color: var(--color-text-muted);
}

.step__hint--cta {
  font-weight: 500;
  color: var(--color-accent-lavender-soft);
}

/* ---------- 5. Buttons ---------- */
.cta-button {
  position: relative;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.95rem 2.4rem;
  border: 1px solid rgba(255, 255, 255, 0.18);
  border-radius: var(--radius-pill);
  font-family: var(--font-body);
  font-size: clamp(1rem, 2.4vw, 1.05rem);
  font-weight: 600;
  letter-spacing: 0.02em;
  color: #fff;
  cursor: pointer;
  overflow: hidden;
  isolation: isolate;
  background: linear-gradient(120deg, var(--color-accent-pink) 0%, var(--color-accent-lavender) 100%);
  box-shadow: var(--shadow-glow-pink);
  transition: transform var(--transition-smooth), box-shadow var(--transition-smooth);
}

.cta-button--block {
  width: 100%;
}

.cta-button:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-glow-lavender), 0 12px 30px rgba(255, 110, 199, 0.35);
}

.cta-button:active {
  transform: translateY(-1px) scale(0.99);
}

.cta-button:focus-visible,
.btn-secondary:focus-visible,
.field__input:focus-visible {
  outline: 3px solid var(--color-accent-lavender-soft);
  outline-offset: 3px;
}

.cta-button__glow {
  position: absolute;
  inset: 0;
  z-index: -1;
  background: linear-gradient(110deg, transparent 30%, rgba(255, 255, 255, 0.35) 50%, transparent 70%);
  transform: translateX(-120%);
  animation: sheen 3.5s ease-in-out infinite;
}

.btn-secondary {
  padding: 0.7rem 1.4rem;
  border: 1px solid rgba(185, 140, 255, 0.4);
  border-radius: var(--radius-pill);
  background: rgba(185, 140, 255, 0.12);
  color: var(--color-text);
  font-family: var(--font-body);
  font-size: 0.95rem;
  font-weight: 500;
  cursor: pointer;
  transition: background var(--transition-smooth), transform var(--transition-smooth);
}

.btn-secondary:hover {
  background: rgba(185, 140, 255, 0.24);
  transform: translateY(-2px);
}

/* ---------- 6. Creator Card & Form ---------- */
.creator__card {
  width: 100%;
  max-width: var(--max-width);
  padding: clamp(1.75rem, 5vw, 2.75rem);
  border-radius: var(--radius-card);
  background: rgba(42, 17, 80, 0.5);
  border: 1px solid rgba(185, 140, 255, 0.25);
  box-shadow: var(--shadow-card);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  animation: rise-in 800ms cubic-bezier(0.22, 1, 0.36, 1) both;
}

.wish-form {
  display: flex;
  flex-direction: column;
  gap: 1.1rem;
  margin-top: 1.5rem;
}

.field {
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
  text-align: left;
}

.field__label {
  font-size: 0.85rem;
  font-weight: 500;
  color: var(--color-accent-lavender-soft);
  letter-spacing: 0.02em;
}

.field__input {
  width: 100%;
  padding: 0.85rem 1rem;
  border-radius: var(--radius-field);
  border: 1px solid rgba(185, 140, 255, 0.3);
  background: rgba(21, 7, 37, 0.6);
  color: var(--color-text);
  font-family: var(--font-body);
  font-size: 1rem;
  transition: border-color var(--transition-smooth), box-shadow var(--transition-smooth);
}

.field__input::placeholder {
  color: rgba(195, 179, 224, 0.5);
}

.field__input:focus {
  border-color: var(--color-accent-pink);
  box-shadow: 0 0 0 4px rgba(255, 110, 199, 0.15);
}

.field__input--area {
  resize: vertical;
  min-height: 6rem;
  line-height: 1.5;
}

.field__input.is-invalid {
  border-color: #ff7a7a;
}

.field__help {
  margin: 0;
  font-size: 0.78rem;
  color: var(--color-text-muted);
}

.field__error {
  margin: 0;
  min-height: 1rem;
  font-size: 0.78rem;
  color: #ff9a9a;
}

/* ---------- 7. Share Panel ---------- */
.share {
  margin-top: 1.75rem;
  padding-top: 1.5rem;
  border-top: 1px solid rgba(185, 140, 255, 0.2);
  text-align: left;
  animation: rise-in 600ms cubic-bezier(0.22, 1, 0.36, 1) both;
}

.share__title {
  margin: 0 0 1rem;
  font-family: var(--font-display);
  font-size: 1.4rem;
  color: var(--color-accent-pink-soft);
  text-align: center;
}

.share__row {
  display: flex;
  gap: 0.6rem;
  align-items: stretch;
}

.share__input {
  flex: 1;
  font-size: 0.85rem;
  cursor: text;
}

.share__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.6rem;
  margin-top: 0.85rem;
}

.share__note {
  margin: 1rem 0 0;
  font-size: 0.78rem;
  line-height: 1.5;
  color: var(--color-text-muted);
}

/* ---------- 8. Envelope ---------- */
.envelope {
  position: relative;
  width: min(320px, 82vw);
  aspect-ratio: 3 / 2;
  border: none;
  background: none;
  padding: 0;
  cursor: pointer;
  perspective: 1000px;
  filter: drop-shadow(0 20px 40px rgba(0, 0, 0, 0.5));
  transition: transform var(--transition-smooth);
}

.envelope:hover {
  transform: translateY(-4px) scale(1.02);
}

.envelope:focus-visible {
  outline: 3px solid var(--color-accent-lavender-soft);
  outline-offset: 6px;
  border-radius: 12px;
}

/* Envelope body / pocket */
.envelope__pocket {
  position: absolute;
  inset: 0;
  border-radius: 12px;
  background: linear-gradient(160deg, var(--color-accent-lavender) 0%, #8f5fe0 100%);
  box-shadow: inset 0 -12px 24px rgba(0, 0, 0, 0.2);
  overflow: hidden;
}

/* Triangular flap folds on the pocket */
.envelope__pocket::before,
.envelope__pocket::after {
  content: "";
  position: absolute;
  bottom: 0;
  width: 60%;
  height: 100%;
  background: linear-gradient(180deg, rgba(0, 0, 0, 0.12), rgba(0, 0, 0, 0));
}

.envelope__pocket::before {
  left: 0;
  clip-path: polygon(0 0, 100% 100%, 0 100%);
}

.envelope__pocket::after {
  right: 0;
  clip-path: polygon(100% 0, 100% 100%, 0 100%);
}

/* Top flap that opens */
.envelope__flap {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 56%;
  border-radius: 12px 12px 0 0;
  background: linear-gradient(180deg, var(--color-accent-pink-soft) 0%, var(--color-accent-pink) 100%);
  clip-path: polygon(0 0, 100% 0, 50% 100%);
  transform-origin: top center;
  transition: transform 900ms cubic-bezier(0.65, 0, 0.35, 1);
  z-index: 3;
  box-shadow: 0 6px 14px rgba(0, 0, 0, 0.25);
}

/* Letter peeking out of the pocket */
.envelope__letter {
  position: absolute;
  left: 8%;
  top: 30%;
  width: 84%;
  height: 70%;
  border-radius: 8px;
  background: var(--color-paper);
  z-index: 1;
  transform: translateY(0);
  transition: transform 900ms cubic-bezier(0.22, 1, 0.36, 1) 300ms;
  box-shadow: 0 8px 20px rgba(0, 0, 0, 0.2);
}

.envelope__seal {
  position: absolute;
  top: 46%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 46px;
  height: 46px;
  display: grid;
  place-items: center;
  border-radius: 50%;
  background: radial-gradient(circle at 35% 30%, #fff, var(--color-accent-pink) 70%);
  box-shadow: var(--shadow-glow-pink);
  font-size: 1.2rem;
  z-index: 4;
  transition: opacity var(--transition-smooth), transform var(--transition-smooth);
}

/* Opened state */
.envelope.is-open .envelope__flap {
  transform: rotateX(-170deg);
  z-index: 0;
}

.envelope.is-open .envelope__letter {
  transform: translateY(-45%);
}

.envelope.is-open .envelope__seal {
  opacity: 0;
  transform: translate(-50%, -50%) scale(0.4);
}

/* ---------- 9. Letter ---------- */
.letter {
  position: relative;
  width: min(560px, 92vw);
  padding: clamp(1.75rem, 5vw, 3rem);
  text-align: left;
  color: var(--color-paper-ink);
  background:
    linear-gradient(180deg, #ffffff 0%, var(--color-paper) 100%);
  border-radius: 18px;
  box-shadow: 0 30px 60px rgba(0, 0, 0, 0.45);
  animation: letter-in 800ms cubic-bezier(0.22, 1, 0.36, 1) both;
}

/* Subtle ruled lines like stationery */
.letter::before {
  content: "";
  position: absolute;
  inset: 0;
  border-radius: 18px;
  background-image: repeating-linear-gradient(
    transparent,
    transparent 31px,
    rgba(185, 140, 255, 0.12) 32px
  );
  pointer-events: none;
}

.letter__salutation {
  margin: 0 0 0.35rem;
  font-family: var(--font-display);
  font-size: 1.25rem;
  color: var(--color-accent-lavender);
}

.letter__headline {
  margin: 0 0 1rem;
  font-family: var(--font-display);
  font-size: clamp(1.9rem, 6vw, 2.6rem);
  line-height: 1.1;
  color: #b0308f;
}

.letter__message {
  margin: 0 0 1.5rem;
  font-size: clamp(1rem, 2.6vw, 1.1rem);
  line-height: 1.7;
  white-space: pre-wrap;
  word-wrap: break-word;
}

.letter__signature {
  margin: 0;
  font-family: var(--font-display);
  font-style: italic;
  font-size: 1.1rem;
  color: var(--color-accent-lavender);
}

/* ---------- 10. Interactive Cake ---------- */
.cake-stage {
  width: 100%;
  display: flex;
  justify-content: center;
  padding: 1rem 0;
}

/* ---------- Base cake visuals (size, layers, frosting, candles) ---------- */
.cake {
  position: relative;
  width: 260px;
  height: 220px;
  margin: 0 auto;
  filter: drop-shadow(0 18px 28px rgba(0, 0, 0, 0.45));
}

/* Each tier: a sponge layer with a frosting cap + drips */
.cake__tier {
  position: absolute;
  left: 50%;
  transform: translateX(-50%);
  border-radius: 8px 8px 6px 6px;
  box-shadow: inset 0 -8px 14px rgba(0, 0, 0, 0.2);
}

/* Frosting band across the top of the tier */
.cake__tier::before {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  top: 0;
  height: 15px;
  background: linear-gradient(180deg, #ffffff 0%, #f3e6ff 100%);
  border-radius: 8px 8px 0 0;
}

/* Hanging frosting drips under the band */
.cake__tier::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  top: 12px;
  height: 12px;
  background-image: radial-gradient(circle at 10px 0, #f3e6ff 9px, transparent 10px);
  background-size: 20px 12px;
  background-repeat: repeat-x;
}

/* Bottom (largest) tier — lavender sponge */
.cake__tier--bottom {
  bottom: 14px;
  width: 200px;
  height: 56px;
  background: linear-gradient(180deg, #c9a6ff 0%, #a978ff 100%);
}

/* Middle tier — pink sponge */
.cake__tier--middle {
  bottom: 64px;
  width: 168px;
  height: 48px;
  background: linear-gradient(180deg, #ffc0e6 0%, #ff9ad4 100%);
}

/* Top (smallest) tier — cream sponge */
.cake__tier--top {
  bottom: 106px;
  width: 136px;
  height: 40px;
  background: linear-gradient(180deg, #ffffff 0%, #f0e4ff 100%);
}

/* Cake plate */
.cake__plate {
  position: absolute;
  left: 50%;
  transform: translateX(-50%);
  bottom: 0;
  width: 240px;
  height: 20px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.14);
  box-shadow: 0 10px 24px rgba(0, 0, 0, 0.4);
}

/* Candles */
.cake__candle {
  position: absolute;
  bottom: 142px;
  width: 9px;
  height: 34px;
  border-radius: 4px;
  background: repeating-linear-gradient(45deg, #ffffff 0 5px, var(--color-accent-pink) 5px 10px);
  box-shadow: 0 2px 4px rgba(0, 0, 0, 0.25);
}

.cake__candle:nth-of-type(1) { left: 96px; }
.cake__candle:nth-of-type(2) { left: 126px; }
.cake__candle:nth-of-type(3) { left: 156px; }

/* Flames */
.cake__flame {
  position: absolute;
  top: -16px;
  left: 50%;
  transform: translateX(-50%);
  width: 12px;
  height: 18px;
  border-radius: 50% 50% 50% 50% / 60% 60% 40% 40%;
  background: radial-gradient(circle at 50% 70%, #fff3b0 0%, #ffb347 45%, #ff7a3d 100%);
  box-shadow: 0 0 14px 3px rgba(255, 170, 60, 0.7);
  transform-origin: bottom center;
  animation: flicker 1.4s ease-in-out infinite;
}

.cake--interactive {
  position: relative;
  cursor: pointer;
  touch-action: none; /* let JS own vertical drags for cutting */
  user-select: none;
  -webkit-user-select: none;
  -webkit-tap-highlight-color: transparent;
  transition: transform var(--transition-smooth);
}

.cake--interactive:focus-visible {
  outline: 3px solid var(--color-accent-lavender-soft);
  outline-offset: 10px;
  border-radius: 16px;
}

.cake--interactive.is-cutting {
  transform: scale(1.03);
}

/* Knife that follows the pointer during a cut */
.cake__knife {
  position: absolute;
  top: -18px;
  left: 50%;
  width: 8px;
  height: 150px;
  margin-left: -4px;
  transform: translateY(-40%) scaleY(0.6);
  transform-origin: top center;
  opacity: 0;
  pointer-events: none;
  transition: opacity 150ms ease;
  z-index: 6;
}

.cake__knife-blade {
  display: block;
  width: 100%;
  height: 100%;
  border-radius: 4px;
  background: linear-gradient(180deg, #eef2ff 0%, #b9c2e0 60%, #8b93b8 100%);
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.4);
}

.cake--interactive.is-dragging .cake__knife,
.cake--interactive.is-cutting .cake__knife {
  opacity: 1;
}

/* Cake split halves once cut */
.cake--interactive.is-cut .cake__tier--top,
.cake--interactive.is-cut .cake__tier--middle,
.cake--interactive.is-cut .cake__tier--bottom,
.cake--interactive.is-cut .cake__plate {
  transition: transform 600ms cubic-bezier(0.22, 1, 0.36, 1);
}

.cake--interactive.is-cut .cake__tier--top,
.cake--interactive.is-cut .cake__tier--middle,
.cake--interactive.is-cut .cake__tier--bottom {
  transform: translateX(-50%) translateX(-14px) rotate(-3deg);
}

.cake--interactive.is-cut .cake__plate {
  transform: translateX(-50%) translateX(-14px);
}

.cake--interactive.is-cut .cake__candle {
  transform: translateX(-14px) rotate(-3deg);
  transition: transform 600ms cubic-bezier(0.22, 1, 0.36, 1);
}

/* ---------- 11. Fireworks / Finale ---------- */
.step--finale {
  position: relative;
  min-height: 70vh;
  width: 100%;
}

.fireworks-canvas {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  z-index: 0;
  pointer-events: none;
}

.finale__content {
  position: relative;
  z-index: 2;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 1rem;
  text-align: center;
  animation: rise-in 700ms cubic-bezier(0.22, 1, 0.36, 1) both;
}

/* ---------- 12. Footer ---------- */
.footer {
  text-align: center;
  padding: 1.5rem 1.25rem 2rem;
}

.footer__text {
  margin: 0;
  font-size: 0.85rem;
  color: var(--color-text-muted);
  opacity: 0.8;
}

/* ---------- 13. Keyframes ---------- */
@keyframes rise-in {
  from {
    opacity: 0;
    transform: translateY(28px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes letter-in {
  from {
    opacity: 0;
    transform: translateY(40px) rotate(-2deg) scale(0.96);
  }
  to {
    opacity: 1;
    transform: translateY(0) rotate(0) scale(1);
  }
}

@keyframes sheen {
  0%,
  55% {
    transform: translateX(-120%);
  }
  100% {
    transform: translateX(120%);
  }
}

@keyframes flicker {
  0%,
  100% {
    transform: translateX(-50%) scale(1);
    opacity: 1;
  }
  50% {
    transform: translateX(-50%) scale(1.15) skewX(3deg);
    opacity: 0.85;
  }
}

/* ---------- 14. Responsive ---------- */
@media (max-width: 640px) {
  .view {
    padding: 2rem 1rem;
  }
  .share__row {
    flex-direction: column;
  }
  .share__actions .btn-secondary {
    flex: 1;
    text-align: center;
  }
  .cake {
    transform: scale(0.9);
  }
}

@media (min-width: 1024px) {
  .view__title {
    font-size: 3rem;
  }
}

/* ---------- 15. Reduced Motion ---------- */
@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.001ms !important;
    scroll-behavior: auto !important;
  }
  .cta-button__glow,
  .cake__flame {
    animation: none !important;
  }
}