/* ════════════════════════════════════════════════════════
   BIRTHDAY QUIZ  —  style.css
   ════════════════════════════════════════════════════════ */

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

:root {
  --bg:        #080614;
  --surface:   rgba(255, 255, 255, 0.055);
  --border:    rgba(255, 255, 255, 0.11);
  --accent1:   #c77dff;   /* purple */
  --accent2:   #00f0c8;   /* teal   */
  --accent3:   #ff6b9d;   /* pink   */
  --gold:      #ffd700;
  --text:      #f0e8ff;
  --text-dim:  rgba(240, 232, 255, 0.5);
  --radius:    20px;
  --shadow:    0 12px 48px rgba(0, 0, 0, 0.55);
}

html, body {
  height: 100%;
  font-family: 'Segoe UI', system-ui, -apple-system, sans-serif;
  background: var(--bg);
  color: var(--text);
  overflow: hidden;
}

/* ─── Confetti / fireworks canvas ────────────────────── */
#confetti-canvas {
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 999;
}

/* ─── Screen containers ──────────────────────────────── */
.screen {
  position: fixed;
  inset: 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.55s ease;
}
.screen.active {
  opacity: 1;
  pointer-events: all;
}

/* ─── Shared buttons ─────────────────────────────────── */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
  padding: 0.8rem 2rem;
  font-size: 1.05rem;
  font-weight: 700;
  border: none;
  border-radius: 50px;
  cursor: pointer;
  letter-spacing: 0.3px;
  transition: transform 0.14s ease, box-shadow 0.14s ease, opacity 0.2s ease, background 0.2s ease;
}
.btn:hover:not(:disabled) { transform: translateY(-2px); }
.btn:active:not(:disabled) { transform: translateY(0px); }
.btn:disabled { opacity: 0.35; cursor: not-allowed; }

.btn-primary {
  background: linear-gradient(135deg, var(--accent1), var(--accent3));
  color: #fff;
  box-shadow: 0 4px 22px rgba(199, 125, 255, 0.4);
}
.btn-primary:hover:not(:disabled) {
  box-shadow: 0 8px 32px rgba(199, 125, 255, 0.65);
}

.btn-secondary {
  background: rgba(255,255,255,0.09);
  color: var(--text);
  border: 1px solid var(--border);
}
.btn-secondary:hover:not(:disabled) {
  background: rgba(255,255,255,0.16);
}

.btn-icon {
  padding: 0.35rem 0.7rem;
  font-size: 1rem;
  background: rgba(255,255,255,0.07);
  border: 1px solid var(--border);
  color: var(--text);
  border-radius: 50px;
}

.btn-arrow { transition: transform 0.2s ease; }
.btn:hover .btn-arrow { transform: translateX(4px); }

/* ════════════════════════════════════════════════════════
   SCREEN 1 · Intro
   ════════════════════════════════════════════════════════ */
#intro-screen {
  background: var(--bg);
}

#intro-screen::before {
  content: "";
  position: absolute;
  inset: 0;
  background: url("images/01.JPG") center / cover no-repeat;
  opacity: 0.45;
  z-index: 0;
}

#intro-screen .intro-content {
  position: relative;
  z-index: 1;
}

.intro-content {
  text-align: center;
  padding: 2rem 1.5rem;
  max-width: 540px;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.9rem;
}

@keyframes float {
  0%, 100% { transform: translateY(0); }
  50%       { transform: translateY(-14px); }
}

.intro-title {
  font-size: clamp(2.2rem, 7vw, 3.6rem);
  font-weight: 900;
  line-height: 1.1;
  background: linear-gradient(130deg, #fff 10%, var(--accent1) 55%, var(--accent3) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.intro-sub {
  font-size: clamp(1rem, 3vw, 1.25rem);
  color: var(--text-dim);
  font-weight: 500;
}

.intro-desc {
  font-size: 0.92rem;
  color: var(--text-dim);
  line-height: 1.75;
}

/* ════════════════════════════════════════════════════════
   SCREEN 2 · Quiz  (fullscreen slide layout)
   ════════════════════════════════════════════════════════ */
#quiz-screen {
  background: var(--bg);
  justify-content: flex-start;
  padding: 0;
}

/* Progress bar floats over the slide */
.quiz-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 20;
  padding: 0.85rem 1.3rem 1rem;
  background: linear-gradient(to bottom, rgba(8,6,20,0.88) 0%, transparent 100%);
  display: flex;
  flex-direction: column;
  gap: 0.45rem;
  pointer-events: none;   /* let taps pass through to the slide */
}
.quiz-header .btn-icon { pointer-events: all; }

.quiz-header-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.progress-track {
  width: 100%;
  height: 5px;
  background: rgba(255,255,255,0.12);
  border-radius: 3px;
  overflow: hidden;
}

.progress-fill {
  height: 100%;
  width: 0%;
  background: linear-gradient(90deg, var(--accent1), var(--accent2));
  border-radius: 3px;
  transition: width 0.55s cubic-bezier(0.4, 0, 0.2, 1);
}

.progress-label {
  font-size: 0.78rem;
  color: rgba(240,232,255,0.65);
  font-weight: 600;
  letter-spacing: 0.3px;
}

/* Slide area fills the whole viewport */
.slide-area {
  position: fixed;
  inset: 0;
  z-index: 1;
  overflow: hidden;
}

/* ── Slide card — fullscreen ── */
.slide-card {
  position: absolute;
  inset: 0;
  background: transparent;
  border: none;
  border-radius: 0;
  padding: 0;
  box-shadow: none;
  backdrop-filter: none;
  -webkit-backdrop-filter: none;
  display: flex;
  flex-direction: column;
  overflow: hidden;
  /* enter state */
  opacity: 0;
  transform: scale(1.05);
  transition: opacity 0.45s ease, transform 0.45s ease;
}
.slide-card.active {
  opacity: 1;
  transform: scale(1);
}
.slide-card.exiting {
  opacity: 0;
  transform: scale(0.96);
  transition: opacity 0.38s ease, transform 0.38s ease;
}

/* ── Full-bleed image layer ── */
.slide-image {
  position: absolute;
  inset: 0;
  background: linear-gradient(160deg, #1c1050 0%, #0d0830 100%);
  overflow: hidden;
  display: flex;
  align-items: center;
  justify-content: center;
}

.slide-image img {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: 0.6;
}

/* Gradient that darkens the bottom so text is readable */
.slide-image-overlay {
  position: absolute;
  inset: 0;
  z-index: 1;
  background: linear-gradient(
    to bottom,
    rgba(8, 6, 20, 0.05)  0%,
    rgba(8, 6, 20, 0.02) 40%,
    rgba(8, 6, 20, 0.30) 68%,
    rgba(8, 6, 20, 0.75) 84%,
    rgba(8, 6, 20, 0.92) 100%
  );
}

/* ── Bottom content overlay ── */
.slide-bottom {
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  z-index: 3;
  padding: 1.8rem 1.6rem 2.5rem;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 1.1rem;
}

/* Hint */
.slide-hint {
  font-size: clamp(0.88rem, 2.4vw, 1.05rem);
  color: rgba(240, 232, 255, 0.72);
  text-align: center;
  line-height: 1.65;
  font-style: italic;
  max-width: 500px;
  text-shadow: 0 2px 10px rgba(0,0,0,0.9);
}

/* Word display */
.word-display {
  display: flex;
  align-items: flex-end;
  justify-content: center;
  gap: 7px;
  flex-wrap: wrap;
}

.word-group {
  display: flex;
  align-items: flex-end;
  gap: 7px;
}

.letter-block {
  display: flex;
  flex-direction: column;
  align-items: center;
}

.letter-char {
  display: block;
  font-size: clamp(2.6rem, 7vw, 4.2rem);
  font-weight: 900;
  line-height: 1;
  width: clamp(2.4rem, 6.5vw, 4rem);
  text-align: center;
  border-bottom: 2px solid rgba(255,255,255,0.2);
  padding-bottom: 4px;
  color: var(--text);
  text-shadow: 0 2px 12px rgba(0,0,0,0.8);
}

/* Input wrapper shares the same grid cell */
.letter-block input.letter-input {
  font-size: clamp(2.6rem, 7vw, 4.2rem);
  font-weight: 900;
  line-height: 1;
  width: clamp(2.4rem, 6.5vw, 4rem);
  padding: 0 0 4px;
  background: rgba(199,125,255,0.12);
  border: none;
  border-bottom: 3px solid var(--accent1);
  color: var(--text);
  text-align: center;
  text-transform: uppercase;
  outline: none;
  border-radius: 5px 5px 0 0;
  caret-color: var(--accent1);
  transition: border-color 0.18s ease, background 0.18s ease, color 0.18s ease;
}
.letter-input:focus {
  background: rgba(199,125,255,0.22);
}
.letter-input.correct {
  border-color: var(--accent2);
  color: var(--accent2);
  background: rgba(0,240,200,0.14);
}
.letter-input.wrong {
  border-color: var(--accent3);
  background: rgba(255,107,157,0.14);
  animation: shake 0.32s ease;
}

@keyframes shake {
  0%,100% { transform: translateX(0); }
  25%      { transform: translateX(-6px); }
  75%      { transform: translateX(6px); }
}

/* Next button */
.slide-next-btn {
  justify-content: center;
}

/* Letters footer — pinned to bottom, above everything */
.letters-footer {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  z-index: 20;
  padding: 0.6rem 1.1rem;
  background: rgba(8, 6, 20, 0.88);
  border-top: 1px solid var(--border);
  display: flex;
  align-items: center;
  gap: 0.55rem;
  flex-wrap: wrap;
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
}

.letters-label {
  font-size: 0.72rem;
  color: var(--text-dim);
  font-weight: 600;
  letter-spacing: 0.3px;
  white-space: nowrap;
}

.letter-slots {
  display: flex;
  align-items: center;
  gap: 3px;
  flex-wrap: wrap;
}

/* Each letter box */
.slot {
  width: 22px;
  height: 26px;
  border-radius: 4px;
  border: 1px solid rgba(255,255,255,0.12);
  background: rgba(255,255,255,0.035);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.72rem;
  font-weight: 800;
  color: transparent;   /* hidden until filled */
  transition: color 0.25s ease, background 0.25s ease, border-color 0.25s ease, box-shadow 0.25s ease;
}
.slot.filled {
  color: var(--accent2);
  background: rgba(0,240,200,0.1);
  border-color: rgba(0,240,200,0.45);
  box-shadow: 0 0 8px rgba(0,240,200,0.28);
  animation: pop 0.32s cubic-bezier(0.34,1.56,0.64,1);
}

.slot-spacer {
  width: 10px;
}

@keyframes pop {
  0%   { transform: scale(0.4); }
  100% { transform: scale(1); }
}

/* ════════════════════════════════════════════════════════
   SCREEN 2.5 · Suspense
   ════════════════════════════════════════════════════════ */
#suspense-screen {
  background: #000;
}

/* Full-bleed photo */
.suspense-image {
  position: absolute;
  inset: 0;
  background: url("images/100.jpg") center / cover no-repeat;
}

/* Dark vignette so text pops */
.suspense-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(
    to bottom,
    rgba(0,0,0,0.25) 0%,
    rgba(0,0,0,0.15) 40%,
    rgba(0,0,0,0.65) 75%,
    rgba(0,0,0,0.90) 100%
  );
}

.suspense-content {
  position: relative;
  z-index: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: flex-end;
  gap: 1.2rem;
  padding: 0 2rem 5rem;
  height: 100%;
  width: 100%;
  text-align: center;
}

.suspense-label {
  font-size: clamp(0.85rem, 2.5vw, 1rem);
  color: rgba(240,232,255,0.6);
  letter-spacing: 2px;
  text-transform: uppercase;
  font-weight: 500;
}

.suspense-title {
  font-size: clamp(3.5rem, 12vw, 7rem);
  font-weight: 900;
  color: #fff;
  letter-spacing: 0.04em;
  line-height: 1;
  text-shadow: 0 4px 32px rgba(0,0,0,0.8);
  animation: suspensePulse 2s ease-in-out infinite;
}

@keyframes suspensePulse {
  0%, 100% { opacity: 1; }
  50%       { opacity: 0.75; }
}

#suspense-btn {
  animation: btnPulse 1.2s ease-in-out infinite;
  transform-origin: center;
}

@keyframes btnPulse {
  0%, 100% {
    transform: scale(1);
    box-shadow: 0 4px 22px rgba(199,125,255,0.4), 0 0 0 0 rgba(199,125,255,0.6);
  }
  50% {
    transform: scale(1.12);
    box-shadow: 0 8px 40px rgba(199,125,255,0.8), 0 0 0 18px rgba(199,125,255,0);
  }
}

/* ════════════════════════════════════════════════════════
   SCREEN 3 · Reveal
   ════════════════════════════════════════════════════════ */
#reveal-screen {
  background: #000;
  overflow: hidden;
}

/* ── Layer 1: typewriter stage ── */
.reveal-stage {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 2rem;
  z-index: 1;
  transform-origin: center center;
}

/* The typed text */
.reveal-typing {
  font-size: clamp(2.6rem, 8vw, 5.8rem);
  font-weight: 900;
  letter-spacing: 0.13em;
  color: #fff;
  text-align: center;
  line-height: 1.25;
  margin: 0;
}

/* Blinking block cursor */
.reveal-cursor {
  display: inline-block;
  width: 0.07em;
  height: 0.85em;
  background: #fff;
  margin-left: 0.06em;
  vertical-align: baseline;
  position: relative;
  top: 0.05em;
  animation: cursorBlink 0.7s step-end infinite;
}

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

/* Zoom: letters fly toward the viewer and blow past the screen */
.reveal-stage.zoom {
  animation: zoomToward 1.05s cubic-bezier(0.6, 0, 1, 1) forwards;
}

@keyframes zoomToward {
  0%   { transform: scale(1);   opacity: 1; }
  55%  {                        opacity: 1; }
  100% { transform: scale(22);  opacity: 0; }
}

/* ── Layer 2: concert poster ── */
.reveal-after {
  position: absolute;
  inset: 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 1.4rem;
  padding: 2rem;
  z-index: 2;
  pointer-events: none;
  text-align: center;
  /* Background fades in after zoom */
  background: radial-gradient(ellipse 90% 70% at 50% 50%, #1a0840 0%, #000 70%);
  opacity: 0;
  transition: opacity 0.8s ease;
}
.reveal-after.show {
  opacity: 1;
  pointer-events: all;
}

/* Artist name — big and glowing */
.reveal-artist {
  font-size: clamp(1.8rem, 6vw, 4rem);
  font-weight: 900;
  letter-spacing: 0.14em;
  color: #fff;
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.7s ease, transform 0.7s cubic-bezier(0.34,1.4,0.64,1);
  filter: drop-shadow(0 0 18px rgba(199,125,255,0.7));
  animation: artistGlow 2.5s ease-in-out infinite;
}
.reveal-artist.show {
  opacity: 1;
  transform: translateY(0);
}
@keyframes artistGlow {
  0%, 100% { filter: drop-shadow(0 0 12px rgba(199,125,255,0.6)); }
  50%       { filter: drop-shadow(0 0 32px rgba(199,125,255,1)) drop-shadow(0 0 60px rgba(255,107,157,0.5)); }
}

/* Thin divider line */
.reveal-divider-line {
  width: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, rgba(199,125,255,0.7), rgba(255,107,157,0.7), transparent);
  transition: width 0.7s ease;
  max-width: 360px;
}
.reveal-divider-line.show { width: min(70vw, 360px); }

/* Date + location */
.reveal-date {
  font-size: clamp(1rem, 3.5vw, 1.5rem);
  font-weight: 700;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--gold);
  opacity: 0;
  transform: translateY(14px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}
.reveal-date.show {
  opacity: 1;
  transform: translateY(0);
}

/* Tagline */
.reveal-tagline {
  font-size: clamp(1rem, 2.8vw, 1.3rem);
  color: rgba(240,232,255,0.65);
  line-height: 1.6;
  opacity: 0;
  transition: opacity 0.6s ease;
}
.reveal-tagline.show { opacity: 1; }
.reveal-tagline strong { color: #fff; font-weight: 800; }

#restart-btn {
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.5s ease;
}
#restart-btn.show {
  opacity: 1;
  pointer-events: all;
}

/* ─── Utility ─────────────────────────────────────────── */
.hidden { opacity: 0; pointer-events: none; }

@keyframes fadeUp {
  from { opacity: 0; transform: translateY(18px); }
  to   { opacity: 1; transform: translateY(0); }
}

/* ─── Mobile: stacked layout so photos aren't cropped ──── */
@media (max-width: 600px) {
  /* Intro background — show full photo without cropping */
  #intro-screen::before {
    background-size: contain;
    background-position: center top;
    opacity: 0.35;
  }

  /* Photo takes top portion; natural height, no cropping */
  .slide-image {
    position: relative;
    flex: 1;
    min-height: 0;
    background: #000;
  }

  .slide-image img {
    object-fit: contain;
    opacity: 0.95;
  }

  /* Subtle gradient only at the very bottom edge */
  .slide-image-overlay {
    background: linear-gradient(
      to bottom,
      transparent 75%,
      rgba(8,6,20,0.55) 100%
    );
  }

  /* Controls sit below the photo, not overlaid */
  .slide-bottom {
    position: relative;
    bottom: auto;
    flex-shrink: 0;
    padding: 1rem 1.2rem 1.8rem;
    background: var(--bg);
    gap: 0.8rem;
  }

  /* Slightly smaller letter blocks on narrow screens */
  .letter-char,
  .letter-block input.letter-input {
    font-size: clamp(2rem, 8vw, 3rem);
    width: clamp(1.9rem, 7.5vw, 2.8rem);
  }

  /* Push intro text below the photo */
  .intro-content { padding: 1.5rem 1.2rem; margin-top: 52vw; }

  /* Suspense button stays visible above safe-area */
  .suspense-content { padding-bottom: max(3rem, env(safe-area-inset-bottom, 3rem) + 1.5rem); }

  /* Reveal poster fits without overflow */
  .reveal-after { gap: 1rem; padding: 1.5rem; }
  .reveal-artist { font-size: clamp(1.4rem, 6vw, 2.2rem); }
}

@media (max-width: 380px) {
  .letter-char,
  .letter-block input.letter-input { font-size: 1.9rem; width: 1.7rem; }
}