/* ═══════════════════════════════════════════════════════════
   Valentine's Day — styles.css
   All styling lives here. Theme values are set via CSS
   custom properties and overridden at runtime from CONFIG.
   ═══════════════════════════════════════════════════════════ */

/* ─── CSS Variables (defaults — JS overrides from CONFIG) ── */
:root {
  --accent: #ff4d6d;
  --accent-hover: #e63956;
  --bg-start: #fff1f2;
  --bg-end: #ffe4e6;
  --card-bg: rgba(255, 255, 255, 0.75);
  --text: #3d0814;
  --text-muted: #6b2135;
  --radius: 1.25rem;
  --shadow: 0 8px 32px rgba(100, 0, 30, 0.12);
  --font: "Segoe UI", system-ui, -apple-system, sans-serif;
  --transition-speed: 0.45s;
}

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

html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: var(--font);
  color: var(--text);
  background: linear-gradient(135deg, var(--bg-start), var(--bg-end));
  min-height: 100vh;
  overflow-x: hidden;
  line-height: 1.6;
}

img {
  display: block;
  max-width: 100%;
  height: auto;
}

button {
  cursor: pointer;
  font-family: inherit;
}

/* Focus-visible ring for keyboard users */
:focus-visible {
  outline: 3px solid var(--accent);
  outline-offset: 3px;
}

/* ═══════════════════════════════════════════════════════════
   LANDING SCREEN
   ═══════════════════════════════════════════════════════════ */
.landing {
  position: fixed;
  inset: 0;
  z-index: 100;
  display: flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(135deg, var(--bg-start), var(--bg-end));
  transition: opacity var(--transition-speed) ease,
              visibility var(--transition-speed) ease;
}

.landing.is-hidden {
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
}

/* Confetti canvas overlays the landing */
#confetti-canvas {
  position: fixed;
  inset: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
  z-index: 110;
}

/* ─── Card ─────────────────────────────────────────────── */
.landing__card {
  position: relative;
  background: var(--card-bg);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 3rem 2.5rem;
  max-width: 420px;
  width: 90vw;
  text-align: center;
  animation: card-pop 0.6s ease both;
}

@keyframes card-pop {
  0% {
    opacity: 0;
    transform: scale(0.85) translateY(30px);
  }
  100% {
    opacity: 1;
    transform: scale(1) translateY(0);
  }
}

.landing__headline {
  font-size: clamp(1.5rem, 5vw, 2.25rem);
  font-weight: 800;
  margin-bottom: 0.5rem;
  color: var(--text);
}

.landing__subtext {
  font-size: clamp(0.9rem, 2.5vw, 1.1rem);
  color: var(--text-muted);
  margin-bottom: 2rem;
}

/* ─── Buttons ──────────────────────────────────────────── */
.landing__buttons {
  display: flex;
  gap: 1rem;
  justify-content: center;
  flex-wrap: wrap;
  min-height: 80px;           /* reserve space so layout doesn't jump */
  align-items: center;
  position: relative;
}

.btn {
  padding: 0.75rem 2rem;
  font-size: 1.1rem;
  font-weight: 700;
  border: none;
  border-radius: 999px;
  transition: transform 0.2s ease, box-shadow 0.2s ease, background 0.2s ease;
  user-select: none;
  -webkit-tap-highlight-color: transparent;
}

.btn--yes {
  background: var(--accent);
  color: #fff;
  box-shadow: 0 4px 14px rgba(255, 77, 109, 0.35);
}

.btn--yes:hover,
.btn--yes:focus-visible {
  background: var(--accent-hover);
  transform: scale(1.06);
  box-shadow: 0 6px 20px rgba(255, 77, 109, 0.45);
}

.btn--yes:active {
  transform: scale(0.97);
}

.btn--no {
  background: transparent;
  color: var(--accent);
  border: 2px solid var(--accent);
  position: relative;       /* will become absolute when dodging */
  z-index: 2;
  transition: transform 0.25s ease, left 0.25s ease, top 0.25s ease;
}

.btn--no:hover,
.btn--no:focus-visible {
  background: rgba(255, 77, 109, 0.06);
}

/* When the No button is actively dodging, it goes absolute */
.btn--no.is-dodging {
  position: absolute;
}

/* ─── No-button mobile wiggle ──────────────────────────── */
@keyframes wiggle {
  0%   { transform: translateX(0); }
  15%  { transform: translateX(-12px) rotate(-4deg); }
  30%  { transform: translateX(10px) rotate(3deg); }
  45%  { transform: translateX(-8px) rotate(-2deg); }
  60%  { transform: translateX(6px) rotate(1deg); }
  75%  { transform: translateX(-3px); }
  100% { transform: translateX(0); }
}

.btn--no.is-wiggling {
  animation: wiggle 0.5s ease;
}

/* ═══════════════════════════════════════════════════════════
   SLIDE DECK
   ═══════════════════════════════════════════════════════════ */
.slide-deck {
  scroll-snap-type: y mandatory;
  overflow-y: auto;
  height: 100vh;
  scroll-behavior: smooth;
}

.slide-deck[hidden] {
  display: none;
}

/* ─── Individual Slide ─────────────────────────────────── */
.slide {
  scroll-snap-align: start;
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 2rem 1.5rem;
  position: relative;
}

.slide__inner {
  background: var(--card-bg);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 2.5rem 2rem;
  max-width: 600px;
  width: 100%;
  text-align: center;

  /* Reveal animation defaults */
  opacity: 0;
  transform: translateY(40px);
  transition: opacity 0.7s ease, transform 0.7s ease;
}

.slide__inner.is-visible {
  opacity: 1;
  transform: translateY(0);
}

/* ─── Slide Typography ─────────────────────────────────── */
.slide__title {
  font-size: clamp(1.4rem, 4.5vw, 2rem);
  font-weight: 800;
  margin-bottom: 0.75rem;
  color: var(--text);
}

.slide__body {
  list-style: none;
  margin-bottom: 1.25rem;
}

.slide__body li {
  font-size: clamp(0.95rem, 2.5vw, 1.15rem);
  color: var(--text-muted);
  margin-bottom: 0.35rem;
  line-height: 1.5;
}

.slide__body li::before {
  content: "";
}

/* ─── Photo layouts ────────────────────────────────────── */
.slide__photo-single {
  margin-top: 1rem;
  border-radius: calc(var(--radius) - 0.25rem);
  overflow: hidden;
  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.08);
}

.slide__photo-single img {
  width: 100%;
  aspect-ratio: 4 / 3;
  object-fit: cover;
}

.slide__photo-grid {
  display: grid;
  gap: 0.75rem;
  margin-top: 1rem;
}

.slide__photo-grid.grid-2 {
  grid-template-columns: 1fr 1fr;
}

.slide__photo-grid.grid-3 {
  grid-template-columns: 1fr 1fr;
}

/* Third photo spans full width in a 3-photo grid */
.slide__photo-grid.grid-3 .photo-wrapper:nth-child(3) {
  grid-column: 1 / -1;
}

.photo-wrapper {
  border-radius: calc(var(--radius) - 0.25rem);
  overflow: hidden;
  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.08);
}

.photo-wrapper img {
  width: 100%;
  aspect-ratio: 4 / 3;
  object-fit: cover;
}

/* Placeholder when image fails to load */
.photo-placeholder {
  width: 100%;
  aspect-ratio: 4 / 3;
  background: linear-gradient(135deg, #fecdd3, #fda4af);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--accent);
  font-size: 2rem;
  border-radius: calc(var(--radius) - 0.25rem);
}

/* ─── Caption ──────────────────────────────────────────── */
.photo-caption {
  font-size: 0.8rem;
  color: var(--text-muted);
  margin-top: 0.4rem;
  font-style: italic;
}

/* ─── Back-to-top Button ───────────────────────────────── */
.slide__back-top {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  margin-top: 1.5rem;
  padding: 0.6rem 1.5rem;
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--accent);
  background: transparent;
  border: 2px solid var(--accent);
  border-radius: 999px;
  transition: background 0.2s ease, color 0.2s ease;
}

.slide__back-top:hover,
.slide__back-top:focus-visible {
  background: var(--accent);
  color: #fff;
}

/* ═══════════════════════════════════════════════════════════
   PROGRESS INDICATOR
   ═══════════════════════════════════════════════════════════ */
.progress {
  position: fixed;
  right: 1.25rem;
  top: 50%;
  transform: translateY(-50%);
  z-index: 50;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.5rem;
}

.progress[hidden] {
  display: none;
}

.progress__dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: rgba(255, 77, 109, 0.25);
  border: none;
  padding: 0;
  transition: background 0.3s ease, transform 0.3s ease;
  cursor: pointer;
}

.progress__dot:hover {
  background: rgba(255, 77, 109, 0.5);
}

.progress__dot.is-active {
  background: var(--accent);
  transform: scale(1.35);
}

.progress__label {
  font-size: 0.65rem;
  color: var(--text-muted);
  writing-mode: vertical-rl;
  text-orientation: mixed;
  letter-spacing: 0.05em;
  margin-top: 0.25rem;
}

/* ═══════════════════════════════════════════════════════════
   AUDIO TOGGLE
   ═══════════════════════════════════════════════════════════ */
.audio-toggle {
  position: fixed;
  bottom: 1.25rem;
  right: 1.25rem;
  z-index: 120;
  width: 44px;
  height: 44px;
  border-radius: 50%;
  border: 2px solid var(--accent);
  background: var(--card-bg);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.2rem;
  color: var(--accent);
  box-shadow: var(--shadow);
  transition: background 0.2s ease;
}

.audio-toggle[hidden] {
  display: none;
}

.audio-toggle.is-playing {
  background: var(--accent);
  color: #fff;
}

.audio-toggle__icon {
  line-height: 1;
}

/* ═══════════════════════════════════════════════════════════
   REDUCED MOTION — disable all animations/transitions
   ═══════════════════════════════════════════════════════════ */
@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }

  .slide__inner {
    opacity: 1;
    transform: none;
  }
}

/* ═══════════════════════════════════════════════════════════
   RESPONSIVE TWEAKS
   ═══════════════════════════════════════════════════════════ */
@media (max-width: 480px) {
  .landing__card {
    padding: 2rem 1.5rem;
  }

  .slide__inner {
    padding: 2rem 1.25rem;
  }

  .progress {
    right: 0.6rem;
  }

  .progress__dot {
    width: 8px;
    height: 8px;
  }

  .progress__label {
    display: none; /* hide text label on small screens */
  }
}