/* ==========================================================================
   “I Have Something to Tell You” — Romantic Confession Website
   Alluring Romantic Velvet Rose Palette:
   - Canvas / Warm Paper:  #FAF6F0 (Luxurious romantic cream)
   - Luminous Letter:      #FFFDFA (Warm velvet white)
   - Deep Velvet Rose:     #BD4558 (Intensely romantic, passionate, warm)
   - Crimson Rose Hover:   #A33446
   - Soft Petal Tint:      #FBEBED
   - Petal Blush:          #F4CCD1
   - Rose Gold Accent:     #DDA3A8
   - Poetic Deep Ink:      #2E1B1E (Warm black-cherry espresso)
   - Romantic Mauve:       #82666A
   ========================================================================== */

:root {
  --bg-paper: #FAF6F0;
  --bg-letter: #FFFDFA;
  --color-rose: #BD4558;
  --color-rose-hover: #A33446;
  --color-rose-subtle: #FBEBED;
  --color-blush: #F4CCD1;
  --color-rose-gold: #DDA3A8;
  --color-ink: #2E1B1E;
  --color-muted: #82666A;
  --color-border: rgba(189, 69, 88, 0.16);
  --color-border-subtle: rgba(46, 27, 30, 0.08);
  --shadow-paper: 0 16px 40px -10px rgba(189, 69, 88, 0.12), 0 3px 10px rgba(46, 27, 30, 0.05);
  --shadow-float: 0 20px 45px -8px rgba(189, 69, 88, 0.18), 0 4px 14px rgba(46, 27, 30, 0.07);
  --shadow-envelope: 0 16px 40px rgba(73, 40, 46, 0.14), 0 2px 8px rgba(73, 40, 46, 0.06);
  --font-serif: "Playfair Display", Georgia, "Times New Roman", serif;
  --font-sans: "Plus Jakarta Sans", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 14px;
  --ease-gentle: cubic-bezier(0.22, 1, 0.36, 1);
}

/* Reset & Box Sizing */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
  -webkit-tap-highlight-color: transparent;
}

html {
  font-size: 16px;
  background-color: var(--bg-paper);
  color: var(--color-ink);
  font-family: var(--font-sans);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  min-height: 100vh;
  min-height: 100dvh;
  width: 100%;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  position: relative;
  overflow-x: hidden;
  background-color: var(--bg-paper);
}

/* Subtle organic paper grain overlay */
.paper-texture {
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 1;
  opacity: 0.045;
  background-image: radial-gradient(var(--color-ink) 1px, transparent 0);
  background-size: 20px 20px;
}

/* Romantic warm floating ambient light orbs */
.ambient-glow {
  position: fixed;
  border-radius: 50%;
  filter: blur(85px);
  pointer-events: none;
  z-index: 0;
  opacity: 0.55;
}

.glow-1 {
  top: 8%;
  left: 12%;
  width: 400px;
  height: 400px;
  background: radial-gradient(circle, rgba(244, 204, 209, 0.65) 0%, rgba(250, 246, 240, 0) 70%);
}

.glow-2 {
  bottom: 8%;
  right: 12%;
  width: 460px;
  height: 460px;
  background: radial-gradient(circle, rgba(189, 69, 88, 0.28) 0%, rgba(250, 246, 240, 0) 70%);
}

.glow-3 {
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 650px;
  height: 650px;
  background: radial-gradient(circle, rgba(251, 235, 237, 0.7) 0%, rgba(250, 246, 240, 0) 75%);
}

/* Main Container */
.site-container {
  width: 100%;
  max-width: 540px;
  min-height: 100vh;
  min-height: 100dvh;
  padding: 2.6rem 1.4rem;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  position: relative;
  z-index: 2;
  margin: 0 auto;
}

/* Step Sections */
.step-section {
  width: 100%;
  display: none;
  opacity: 0;
  transform: translateY(16px);
  transition: opacity 0.55s var(--ease-gentle), transform 0.55s var(--ease-gentle);
  flex-direction: column;
  align-items: center;
  text-align: center;
}

.step-section.is-active {
  display: flex;
  opacity: 1;
  transform: translateY(0);
}

/* Subtle Progress Indicator */
.subtle-progress {
  position: fixed;
  top: 18px;
  display: flex;
  gap: 8px;
  z-index: 20;
  pointer-events: auto;
}

.progress-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background-color: var(--color-border);
  transition: all 0.35s var(--ease-gentle);
  cursor: pointer;
  position: relative;
  border: none;
  padding: 0;
  outline: none;
}

/* Touch-friendly tap hitbox */
.progress-dot::before {
  content: "";
  position: absolute;
  top: -8px;
  bottom: -8px;
  left: -6px;
  right: -6px;
}

.progress-dot.active {
  width: 22px;
  border-radius: 4px;
  background-color: var(--color-rose);
  cursor: default;
}

.progress-dot:hover:not(.active) {
  background-color: var(--color-rose-light);
  transform: scale(1.3);
}

/* Opening Screen Elements */
.opening-badge {
  font-family: var(--font-sans);
  font-size: 0.68rem;
  font-weight: 600;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--color-rose);
  padding: 5px 16px;
  border: 1px solid rgba(189, 69, 88, 0.28);
  border-radius: 20px;
  margin-bottom: 1.6rem;
  background-color: rgba(255, 253, 250, 0.85);
  backdrop-filter: blur(6px);
}

.confession-title {
  font-family: var(--font-serif);
  font-size: 2.15rem;
  font-weight: 500;
  line-height: 1.32;
  color: var(--color-ink);
  margin-bottom: 1rem;
  letter-spacing: -0.015em;
}

.confession-subtitle {
  font-family: var(--font-sans);
  font-size: 1.02rem;
  font-weight: 400;
  color: var(--color-muted);
  margin-bottom: 2.4rem;
  line-height: 1.6;
  max-width: 420px;
}

.instruction-text {
  font-family: var(--font-sans);
  font-size: 0.78rem;
  font-weight: 600;
  letter-spacing: 0.04em;
  text-transform: none;
  color: var(--color-muted);
  margin-bottom: 1.2rem;
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

.icon-hint {
  width: 14px;
  height: 14px;
  fill: currentColor;
}

/* Buttons */
.btn-primary {
  font-family: var(--font-sans);
  font-size: 0.88rem;
  font-weight: 600;
  letter-spacing: 0.04em;
  padding: 0.95rem 2rem;
  color: var(--bg-letter);
  background-color: var(--color-rose);
  border: 1px solid var(--color-rose);
  border-radius: var(--radius-sm);
  cursor: pointer;
  box-shadow: 0 4px 18px rgba(189, 69, 88, 0.35);
  transition: all 0.25s var(--ease-gentle);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  outline: none;
  min-height: 48px;
}

.btn-primary:hover {
  background-color: var(--color-rose-hover);
  border-color: var(--color-rose-hover);
  transform: translateY(-2px);
  box-shadow: 0 6px 22px rgba(189, 69, 88, 0.45);
}

.btn-primary:active {
  transform: translateY(0) scale(0.98);
}

/* ==========================================================================
   THE ENVELOPE (Screen 2) — Solid Bug-Free Architecture
   ========================================================================== */
.envelope-stage {
  width: 100%;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  perspective: 1200px;
}

.envelope-wrapper {
  position: relative;
  width: 300px;
  height: 195px;
  border-radius: 4px;
  box-shadow: var(--shadow-envelope);
  cursor: pointer;
  margin: 1.5rem 0 2.2rem;
  transition: transform 0.3s var(--ease-gentle);
}

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

.envelope-wrapper:active {
  transform: translateY(0) scale(0.98);
}

/* Layer 1: Solid Back Wall */
.envelope-back-wall {
  position: absolute;
  inset: 0;
  background-color: #EAE0D3;
  border-radius: 4px;
  border: 1px solid rgba(46, 27, 30, 0.1);
  z-index: 1;
}

/* Layer 2: The Letter (Sandwiched inside, zero clipping) */
.envelope-letter {
  position: absolute;
  bottom: 8px;
  left: 18px;
  width: 264px;
  height: 165px;
  background-color: var(--bg-letter);
  border-radius: 3px;
  box-shadow: 0 4px 14px rgba(46, 27, 30, 0.08);
  padding: 1.4rem;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  text-align: center;
  z-index: 2;
  border: 1px solid rgba(189, 69, 88, 0.12);
  transform: translateY(0);
  transition: transform 0.85s cubic-bezier(0.18, 0.89, 0.32, 1.1) 0.35s;
}

.envelope-letter-greeting {
  font-family: var(--font-serif);
  font-size: 1.6rem;
  font-style: italic;
  font-weight: 500;
  color: var(--color-ink);
  opacity: 0;
  transition: opacity 0.5s ease 0.75s;
}

.envelope-letter-line {
  width: 38px;
  height: 2px;
  background-color: var(--color-rose);
  margin-top: 8px;
  opacity: 0;
  transition: opacity 0.5s ease 0.85s;
}

/* Layer 3: Solid Front Pocket (Guarantees letter stays behind) */
.envelope-front-pocket {
  position: absolute;
  inset: 0;
  z-index: 3;
  pointer-events: none;
}

.pocket-svg {
  width: 100%;
  height: 100%;
  display: block;
  filter: drop-shadow(0 -2px 6px rgba(46, 27, 30, 0.07));
}

.pocket-base {
  fill: #F2E7DC;
  stroke: rgba(46, 27, 30, 0.09);
  stroke-width: 1;
}

.pocket-bottom-fold {
  fill: #E8DCCC;
}

.pocket-left-fold {
  fill: #EDE2D3;
  opacity: 0.9;
}

.pocket-right-fold {
  fill: #E3D6C5;
  opacity: 0.9;
}

/* Vintage Postage Stamp */
.postage-stamp {
  position: absolute;
  top: 14px;
  right: 14px;
  width: 44px;
  height: 52px;
  background-color: #FAF4EB;
  border: 2px dashed var(--color-rose);
  box-shadow: 0 2px 5px rgba(46, 27, 30, 0.12);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 3px;
  transform: rotate(3deg);
  pointer-events: none;
}

.postage-stamp-inner {
  width: 100%;
  height: 100%;
  border: 1px solid rgba(189, 69, 88, 0.4);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  background-color: #FFFDFA;
}

.stamp-rose-icon {
  width: 16px;
  height: 16px;
  fill: var(--color-rose);
  margin-bottom: 2px;
}

.stamp-price {
  font-family: var(--font-sans);
  font-size: 0.55rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  color: var(--color-rose);
}

/* Vintage Postal Cancellation Mark */
.postmark-circle {
  position: absolute;
  top: 18px;
  right: 36px;
  width: 68px;
  height: 68px;
  border: 1.5px dashed rgba(189, 69, 88, 0.4);
  border-radius: 50%;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  transform: rotate(-14deg);
  pointer-events: none;
  opacity: 0.8;
}

.postmark-text {
  font-family: var(--font-sans);
  font-size: 0.48rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  color: var(--color-ink);
}

.postmark-date {
  font-family: var(--font-sans);
  font-size: 0.46rem;
  font-weight: 600;
  letter-spacing: 0.06em;
  color: var(--color-rose);
  margin: 1px 0;
}

.postmark-lines {
  position: absolute;
  right: -36px;
  top: 50%;
  transform: translateY(-50%);
  display: flex;
  flex-direction: column;
  gap: 3px;
}

.postmark-lines span {
  display: block;
  width: 32px;
  height: 1px;
  background-color: rgba(189, 69, 88, 0.35);
}

/* Layer 4: Flap */
.envelope-flap-container {
  position: absolute;
  top: 0;
  left: 0;
  width: 300px;
  height: 120px;
  z-index: 4;
  transform-origin: top center;
  transition: transform 0.8s var(--ease-gentle);
  pointer-events: none;
}

.flap-svg {
  width: 100%;
  height: 100%;
  display: block;
}

.flap-polygon {
  fill: #E6D7C5;
  stroke: rgba(46, 27, 30, 0.1);
  stroke-width: 1;
}

/* Wax Seal */
.wax-seal {
  position: absolute;
  bottom: -18px;
  left: 50%;
  transform: translateX(-50%);
  width: 44px;
  height: 44px;
  background: radial-gradient(circle at 35% 35%, #D45B6E, #8C2A39);
  border-radius: 50%;
  box-shadow: 0 4px 12px rgba(46, 27, 30, 0.35), inset 0 1px 2px rgba(255, 255, 255, 0.45);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 6;
  pointer-events: none;
  transition: opacity 0.35s ease, transform 0.35s ease;
}

.wax-seal-inner {
  width: 28px;
  height: 28px;
  border: 1px dashed rgba(255, 255, 255, 0.6);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
}

.wax-seal-heart {
  width: 13px;
  height: 13px;
  fill: rgba(255, 255, 255, 0.95);
}

/* When Envelope is Opened */
.envelope-wrapper.is-open .envelope-flap-container {
  transform: rotateX(180deg);
  z-index: 1;
}

.envelope-wrapper.is-open .wax-seal {
  opacity: 0;
  transform: translateX(-50%) scale(0.6);
}

.envelope-wrapper.is-open .envelope-letter {
  transform: translateY(-95px);
}

.envelope-wrapper.is-open .envelope-letter-greeting,
.envelope-wrapper.is-open .envelope-letter-line {
  opacity: 1;
}

.envelope-reveal-action {
  opacity: 0;
  transform: translateY(10px);
  pointer-events: none;
  transition: all 0.5s var(--ease-gentle) 0.85s;
}

.envelope-reveal-action.is-visible {
  opacity: 1;
  transform: translateY(0);
  pointer-events: auto;
}

/* ==========================================================================
   LETTER SHEET (Screens 3, 5, 7)
   ========================================================================== */
.letter-paper {
  background-color: var(--bg-letter);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  box-shadow: var(--shadow-paper);
  padding: 2.8rem 2.4rem;
  width: 100%;
  max-width: 510px;
  margin: 0 auto 2rem;
  text-align: left;
  position: relative;
  box-sizing: border-box;
  overflow: hidden;
}

/* Top decorative header border */
.letter-paper::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: linear-gradient(90deg, transparent, var(--color-blush), var(--color-rose), var(--color-blush), transparent);
  opacity: 0.9;
}

/* Botanical Flourish Watermark */
.botanical-flourish {
  position: absolute;
  width: 90px;
  height: 90px;
  color: var(--color-rose);
  opacity: 0.18;
  pointer-events: none;
}

.botanical-flourish.top-right {
  top: 14px;
  right: 16px;
}

.botanical-flourish.bottom-left {
  bottom: 14px;
  left: 16px;
}

.botanical-svg {
  width: 100%;
  height: 100%;
}

.letter-header {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  border-bottom: 1px solid rgba(189, 69, 88, 0.12);
  padding-bottom: 0.9rem;
  margin-bottom: 1.8rem;
}

.letter-salutation {
  font-family: var(--font-serif);
  font-size: 1.75rem;
  font-style: italic;
  font-weight: 500;
  color: var(--color-ink);
}

.letter-tag {
  font-family: var(--font-sans);
  font-size: 0.68rem;
  font-weight: 700;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--color-rose);
}

/* Rich Continuous Prose (No excessive empty spacing) */
.letter-prose {
  font-family: var(--font-serif);
  font-size: 1.16rem;
  line-height: 1.95;
  color: var(--color-ink);
  font-weight: 400;
  text-align: left;
  letter-spacing: 0.01em;
}

.letter-prose p {
  opacity: 0;
  transform: translateY(8px);
  animation: gentleFadeIn 0.7s var(--ease-gentle) forwards 0.15s;
}

@keyframes gentleFadeIn {
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* ==========================================================================
   POLAROID / PHOTO FLIP CARD (Screens 4 & 6)
   ========================================================================== */
.photo-interaction-container {
  width: 100%;
  display: flex;
  flex-direction: column;
  align-items: center;
  perspective: 1200px;
  margin: 0.5rem 0 1.6rem;
}

.polaroid-card {
  width: 275px;
  height: 365px;
  position: relative;
  transform-style: preserve-3d;
  transition: transform 0.75s cubic-bezier(0.2, 0.8, 0.2, 1);
  cursor: pointer;
}

.polaroid-card.tilt-left {
  transform: rotate(-2.2deg);
}

.polaroid-card.tilt-right {
  transform: rotate(2deg);
}

.polaroid-card.tilt-left:hover {
  transform: rotate(-0.8deg) translateY(-4px);
}

.polaroid-card.tilt-right:hover {
  transform: rotate(0.8deg) translateY(-4px);
}

.polaroid-card.tilt-left.is-flipped {
  transform: rotate(-0.8deg) rotateY(180deg);
}

.polaroid-card.tilt-right.is-flipped {
  transform: rotate(0.8deg) rotateY(180deg);
}

.polaroid-face {
  position: absolute;
  inset: 0;
  backface-visibility: hidden;
  -webkit-backface-visibility: hidden;
  background-color: var(--bg-letter);
  border-radius: 3px;
  box-shadow: var(--shadow-float);
  border: 1px solid rgba(189, 69, 88, 0.12);
  box-sizing: border-box;
}

/* Front Face (Photo) */
.polaroid-front {
  padding: 14px 14px 44px 14px;
  display: flex;
  flex-direction: column;
}

.photo-frame {
  width: 100%;
  height: 100%;
  border-radius: 2px;
  overflow: hidden;
  background-color: #EDE8E1;
  position: relative;
}

.photo-frame img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
  filter: contrast(1.03) saturate(0.98);
}

.polaroid-caption {
  font-family: var(--font-serif);
  font-size: 0.95rem;
  font-style: italic;
  color: var(--color-muted);
  text-align: center;
  margin-top: 14px;
}

/* Washi tape */
.washi-tape {
  position: absolute;
  top: -10px;
  left: 50%;
  transform: translateX(-50%);
  width: 82px;
  height: 24px;
  background-color: rgba(244, 204, 209, 0.8);
  box-shadow: 0 1px 4px rgba(46, 27, 30, 0.08);
  border-left: 2px dashed rgba(255, 255, 255, 0.65);
  border-right: 2px dashed rgba(255, 255, 255, 0.65);
  z-index: 2;
  pointer-events: none;
}

.washi-tape-rose {
  background-color: rgba(189, 69, 88, 0.65);
}

/* Back Face (Handwritten Note) */
.polaroid-back {
  transform: rotateY(180deg);
  padding: 2.2rem 1.8rem;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  text-align: center;
  background-color: #FDF9F5;
}

.polaroid-back-inner {
  border: 1px dashed rgba(189, 69, 88, 0.25);
  width: 100%;
  height: 100%;
  padding: 1.8rem 1.4rem;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  box-sizing: border-box;
  position: relative;
}

.polaroid-corner-stamp {
  position: absolute;
  top: 8px;
  right: 10px;
  font-family: var(--font-sans);
  font-size: 0.54rem;
  font-weight: 700;
  letter-spacing: 0.16em;
  color: var(--color-rose);
  opacity: 0.75;
}

.polaroid-handwriting {
  font-family: var(--font-serif);
  font-size: 1.38rem;
  font-style: italic;
  line-height: 1.65;
  color: var(--color-ink);
  font-weight: 500;
}

.photo-action-wrapper {
  opacity: 0;
  transform: translateY(10px);
  pointer-events: none;
  transition: all 0.5s var(--ease-gentle);
  margin-top: 1.2rem;
}

.photo-action-wrapper.is-visible {
  opacity: 1;
  transform: translateY(0);
  pointer-events: auto;
}

/* ==========================================================================
   FINAL CONFESSION & QUESTION (Screen 7 & 8)
   ========================================================================== */
.final-stage {
  width: 100%;
  display: flex;
  flex-direction: column;
  align-items: center;
}

.final-card {
  padding: 3rem 2.4rem;
  text-align: center;
}

.question-lead {
  font-family: var(--font-serif);
  font-size: 1.2rem;
  font-style: italic;
  color: var(--color-muted);
  margin-bottom: 1.2rem;
  line-height: 1.5;
}

.question-divider {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 14px;
  margin: 2rem 0 1.5rem;
}

.question-divider span {
  width: 48px;
  height: 1px;
  background-color: var(--color-border);
}

.divider-heart {
  width: 15px;
  height: 15px;
  fill: var(--color-rose);
  opacity: 0.9;
}

.big-question {
  font-family: var(--font-serif);
  font-size: 2.4rem;
  font-weight: 600;
  color: var(--color-ink);
  line-height: 1.22;
  margin: 0.4rem 0 2.4rem;
  letter-spacing: -0.02em;
}

.answers-grid {
  display: flex;
  flex-direction: column;
  gap: 14px;
  width: 100%;
  max-width: 320px;
  margin: 0 auto;
}

.btn-yes {
  background-color: var(--color-rose);
  color: var(--bg-letter);
  border: 1px solid var(--color-rose);
  padding: 1.1rem 1.6rem;
  font-family: var(--font-sans);
  font-size: 0.92rem;
  font-weight: 700;
  letter-spacing: 0.06em;
  border-radius: var(--radius-sm);
  box-shadow: 0 4px 18px rgba(189, 69, 88, 0.4);
  cursor: pointer;
  transition: all 0.25s var(--ease-gentle);
  min-height: 52px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
}

.btn-yes:hover {
  background-color: var(--color-rose-hover);
  border-color: var(--color-rose-hover);
  transform: translateY(-2px);
  box-shadow: 0 6px 24px rgba(189, 69, 88, 0.5);
}

.btn-yes:active {
  transform: translateY(0) scale(0.98);
}

.btn-no {
  background-color: transparent;
  color: var(--color-muted);
  border: 1px solid var(--color-border);
  padding: 0.95rem 1.6rem;
  font-family: var(--font-sans);
  font-size: 0.86rem;
  font-weight: 600;
  letter-spacing: 0.04em;
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: all 0.25s var(--ease-gentle);
  min-height: 48px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
}

.btn-no:hover {
  border-color: var(--color-rose);
  color: var(--color-ink);
  background-color: rgba(189, 69, 88, 0.04);
}

.btn-no:active {
  transform: scale(0.98);
}

/* ==========================================================================
   TOAST NOTIFICATION (Clipboard Feedback)
   ========================================================================== */
.toast-notice {
  position: fixed;
  bottom: 28px;
  left: 50%;
  transform: translateX(-50%) translateY(20px);
  background-color: var(--color-ink);
  color: var(--bg-letter);
  font-family: var(--font-sans);
  font-size: 0.85rem;
  font-weight: 500;
  padding: 0.8rem 1.6rem;
  border-radius: 30px;
  box-shadow: 0 8px 26px rgba(46, 27, 30, 0.28);
  opacity: 0;
  pointer-events: none;
  transition: all 0.35s var(--ease-gentle);
  z-index: 100;
  white-space: nowrap;
  display: flex;
  align-items: center;
  gap: 8px;
}

.toast-notice.show {
  opacity: 1;
  transform: translateX(-50%) translateY(0);
}

.toast-icon {
  width: 15px;
  height: 15px;
  fill: currentColor;
}

/* Media Queries for Responsive Design */
@media (max-width: 480px) {
  .site-container {
    padding: 2rem 1.1rem;
  }

  .confession-title {
    font-size: 1.75rem;
  }

  .confession-subtitle {
    font-size: 0.95rem;
    margin-bottom: 2rem;
  }

  .envelope-wrapper {
    width: 275px;
    height: 180px;
  }

  .envelope-flap-container {
    width: 275px;
    height: 110px;
  }

  .envelope-letter {
    width: 245px;
    height: 150px;
  }

  .letter-paper {
    padding: 2.2rem 1.5rem;
  }

  .letter-prose {
    font-size: 1.08rem;
    line-height: 1.85;
  }

  .polaroid-card {
    width: 250px;
    height: 335px;
  }

  .big-question {
    font-size: 1.95rem;
  }
}

/* Reduced Motion Support */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}

/* ====================================================================
   FLOATING GLOBAL BACK BUTTON
   ==================================================================== */
.btn-global-back {
  position: fixed;
  top: 14px;
  left: 18px;
  z-index: 50;
  display: inline-flex;
  align-items: center;
  gap: 5px;
  padding: 5px 12px 5px 8px;
  background: rgba(250, 246, 240, 0.85);
  border: 1px solid rgba(189, 69, 88, 0.28);
  border-radius: 30px;
  color: var(--color-ink);
  font-family: var(--font-sans);
  font-size: 0.78rem;
  font-weight: 600;
  letter-spacing: 0.04em;
  text-transform: none;
  cursor: pointer;
  box-shadow: 0 4px 16px rgba(46, 27, 30, 0.08);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  opacity: 0;
  pointer-events: none;
  transform: translateX(-8px);
  transition: opacity 0.3s var(--ease-gentle), transform 0.3s var(--ease-gentle), background-color 0.2s ease, border-color 0.2s ease, color 0.2s ease;
  outline: none;
}

.btn-global-back.is-visible {
  opacity: 1;
  pointer-events: auto;
  transform: translateX(0);
}

.btn-global-back:hover {
  background: rgba(255, 253, 250, 0.96);
  border-color: var(--color-rose);
  color: var(--color-rose);
  transform: translateX(-2px);
  box-shadow: 0 6px 20px rgba(189, 69, 88, 0.16);
}

.btn-global-back:active {
  transform: translateX(0);
}

.back-arrow-svg {
  width: 16px;
  height: 16px;
  transition: transform 0.2s ease;
}

.btn-global-back:hover .back-arrow-svg {
  transform: translateX(-2px);
}

@media (max-width: 480px) {
  .btn-global-back {
    top: 12px;
    left: 12px;
    padding: 4px 10px 4px 6px;
    font-size: 0.74rem;
  }
}

/* ====================================================================
   FLOATING BACKGROUND MUSIC CONTROLLER
   ==================================================================== */
.music-toggle-btn {
  position: fixed;
  top: 14px;
  right: 18px;
  z-index: 50;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 5px 12px 5px 6px;
  background: rgba(250, 246, 240, 0.85);
  border: 1px solid rgba(189, 69, 88, 0.28);
  border-radius: 30px;
  color: var(--color-ink);
  cursor: pointer;
  box-shadow: 0 4px 16px rgba(46, 27, 30, 0.08);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  transition: all 0.25s var(--ease-gentle);
  outline: none;
}

.music-toggle-btn:hover {
  background: rgba(255, 253, 250, 0.96);
  border-color: var(--color-rose);
  transform: translateY(-1px);
  box-shadow: 0 6px 20px rgba(189, 69, 88, 0.16);
}

.music-toggle-btn:active {
  transform: translateY(0);
}

.music-disc-icon {
  width: 26px;
  height: 26px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--color-rose), #8F2D3D);
  color: #FAF6F0;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 2px 6px rgba(189, 69, 88, 0.32);
  transition: all 0.3s ease;
}

.music-note-svg {
  width: 13px;
  height: 13px;
}

.music-sound-bars {
  display: flex;
  align-items: flex-end;
  gap: 2.5px;
  height: 14px;
}

.music-sound-bars .bar {
  width: 2.5px;
  height: 3px;
  background-color: var(--color-rose);
  border-radius: 2px;
  transition: height 0.2s ease, opacity 0.2s ease;
}

/* Playing State: Spinning Vinyl & Pulsing Equalizer Bars */
.music-toggle-btn.is-playing .music-disc-icon {
  animation: spinVinyl 3.6s linear infinite;
}

.music-toggle-btn.is-playing .bar-1 {
  animation: soundBarWave 0.75s ease-in-out infinite alternate;
}
.music-toggle-btn.is-playing .bar-2 {
  animation: soundBarWave 0.55s ease-in-out 0.18s infinite alternate;
}
.music-toggle-btn.is-playing .bar-3 {
  animation: soundBarWave 0.85s ease-in-out 0.36s infinite alternate;
}

/* Paused State */
.music-toggle-btn.is-paused {
  opacity: 0.82;
}

.music-toggle-btn.is-paused .music-disc-icon {
  background: #B3A4A7;
  box-shadow: none;
}

.music-toggle-btn.is-paused .bar {
  height: 3px;
  background-color: #B3A4A7;
  opacity: 0.6;
}

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

@keyframes soundBarWave {
  0% { height: 3px; }
  100% { height: 13px; }
}

@media (max-width: 480px) {
  .music-toggle-btn {
    top: 12px;
    right: 12px;
    padding: 4px 10px 4px 5px;
    gap: 6px;
  }
  .music-disc-icon {
    width: 24px;
    height: 24px;
  }
  .music-note-svg {
    width: 12px;
    height: 12px;
  }
}