/* ==========================================================================
   ROMANTIC SPIRAL STAIRCASE JOURNEY & BIRTHDAY EXPERIENCE
   ========================================================================== */

@import url('https://fonts.googleapis.com/css2?family=Cormorant+Garamond:ital,wght@0,300;0,400;0,600;1,400;1,600&family=Plus+Jakarta+Sans:wght@300;400;500;600;700&family=Great+Vibes&display=swap');

:root {
  --bg-primary: #fff1f2;
  --bg-secondary: #e0f2fe;
  --text-main: #1e293b;
  --text-muted: #64748b;
  --accent-rose: #f43f5e;
  --accent-gold: #f59e0b;
  --accent-blue: #0284c7;
  --card-bg: rgba(255, 255, 255, 0.94);
  --card-border: rgba(186, 230, 254, 0.5);
  --nav-bg: rgba(255, 255, 255, 0.88);
  --font-serif: 'Cormorant Garamond', Georgia, serif;
  --font-sans: 'Plus Jakarta Sans', -apple-system, BlinkMacSystemFont, sans-serif;
  --font-cursive: 'Great Vibes', cursive;
  --transition-theme: background 1.2s cubic-bezier(0.4, 0, 0.2, 1), color 0.8s ease;
}

body[data-current-theme="dawn"] {
  --bg-primary: #fff1f2;
  --bg-secondary: #fce7f3;
  --text-main: #33272a;
  --text-muted: #64748b;
  --accent-rose: #f43f5e;
  --card-bg: rgba(255, 255, 255, 0.94);
  --card-border: rgba(244, 63, 94, 0.2);
  --nav-bg: rgba(255, 241, 242, 0.9);
}

body[data-current-theme="skyblue"] {
  --bg-primary: #e0f2fe;
  --bg-secondary: #bae6fd;
  --text-main: #0f172a;
  --text-muted: #475569;
  --accent-rose: #0284c7;
  --card-bg: rgba(255, 255, 255, 0.95);
  --card-border: rgba(56, 189, 248, 0.35);
  --nav-bg: rgba(224, 242, 254, 0.9);
}

body[data-current-theme="twilight"] {
  --bg-primary: #2e1065;
  --bg-secondary: #3b0764;
  --text-main: #f5f3ff;
  --text-muted: #c4b5fd;
  --accent-rose: #f472b6;
  --card-bg: rgba(46, 16, 101, 0.85);
  --card-border: rgba(192, 132, 252, 0.35);
  --nav-bg: rgba(46, 16, 101, 0.9);
}

body[data-current-theme="midnight"] {
  --bg-primary: #030712;
  --bg-secondary: #0f172a;
  --text-main: #f8fafc;
  --text-muted: #94a3b8;
  --accent-rose: #38bdf8;
  --card-bg: rgba(15, 23, 42, 0.88);
  --card-border: rgba(56, 189, 248, 0.3);
  --nav-bg: rgba(3, 7, 18, 0.9);
}

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

html {
  scroll-behavior: smooth;
  font-size: 16px;
}

body {
  font-family: var(--font-sans);
  background: var(--bg-primary);
  background-image: radial-gradient(circle at 50% 0%, var(--bg-secondary) 0%, var(--bg-primary) 70%);
  color: var(--text-main);
  transition: var(--transition-theme);
  line-height: 1.8;
  overflow-x: hidden;
  position: relative;
  min-height: 100vh;
}

#particles-canvas {
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  pointer-events: none;
  z-index: 10;
}

.sparkle-particle {
  position: fixed;
  pointer-events: none;
  font-size: 1.2rem;
  z-index: 99999;
  animation: floatUpFade 1.2s ease-out forwards;
}

@keyframes floatUpFade {
  0% { transform: translate(0, 0) scale(0.6); opacity: 1; }
  100% { transform: translate(var(--tx, 0), var(--ty, -50px)) scale(1.4); opacity: 0; }
}

.hidden { display: none !important; }

/* ==========================================================================
   LOCK SCREEN
   ========================================================================== */
#lock-screen {
  position: fixed;
  inset: 0;
  background: radial-gradient(circle at center, #1e1b4b 0%, #030712 100%);
  z-index: 10000;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 1.5rem;
  transition: opacity 1s cubic-bezier(0.4, 0, 0.2, 1), transform 1s cubic-bezier(0.4, 0, 0.2, 1);
}

#lock-screen.unlocked {
  opacity: 0;
  transform: scale(1.08);
  pointer-events: none;
}

#lock-screen.unlocked-instant {
  display: none !important;
}

.lock-card {
  background: rgba(255, 255, 255, 0.08);
  backdrop-filter: blur(24px);
  -webkit-backdrop-filter: blur(24px);
  border: 1px solid rgba(255, 255, 255, 0.15);
  padding: 3rem 2rem;
  border-radius: 28px;
  max-width: 440px;
  width: 100%;
  text-align: center;
  box-shadow: 0 25px 60px rgba(0, 0, 0, 0.6), 0 0 40px rgba(56, 189, 248, 0.2);
  color: #fff;
}

.lock-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  background: rgba(56, 189, 248, 0.2);
  border: 1px solid rgba(56, 189, 248, 0.4);
  color: #bae6fd;
  padding: 0.4rem 1.1rem;
  border-radius: 999px;
  font-size: 0.85rem;
  letter-spacing: 1px;
  text-transform: uppercase;
  margin-bottom: 1.5rem;
}

.lock-title {
  font-family: var(--font-serif);
  font-size: 2.1rem;
  font-weight: 400;
  line-height: 1.3;
  margin-bottom: 0.8rem;
  color: #f0f9ff;
}

.lock-subtitle {
  font-size: 0.95rem;
  color: #bae6fd;
  opacity: 0.85;
  margin-bottom: 2rem;
}

.lock-input-group {
  display: flex;
  flex-direction: column;
  gap: 0.9rem;
}

.lock-input {
  width: 100%;
  padding: 1rem 1.3rem;
  background: rgba(255, 255, 255, 0.1);
  border: 1px solid rgba(255, 255, 255, 0.25);
  border-radius: 14px;
  color: #fff;
  font-size: 1rem;
  text-align: center;
  outline: none;
  transition: all 0.3s ease;
}

.lock-input:focus {
  border-color: #38bdf8;
  box-shadow: 0 0 15px rgba(56, 189, 248, 0.5);
  background: rgba(255, 255, 255, 0.15);
}

.lock-btn {
  padding: 1rem;
  background: linear-gradient(135deg, #0284c7, #38bdf8);
  border: none;
  border-radius: 14px;
  color: #fff;
  font-weight: 600;
  font-size: 1rem;
  cursor: pointer;
  box-shadow: 0 8px 25px rgba(2, 132, 199, 0.4);
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.lock-btn:hover {
  transform: translateY(-2px);
  box-shadow: 0 12px 30px rgba(2, 132, 199, 0.6);
}

.lock-hint-btn {
  background: none;
  border: none;
  color: #cbd5e1;
  font-size: 0.85rem;
  margin-top: 1rem;
  cursor: pointer;
  text-decoration: underline;
  opacity: 0.7;
}

.lock-hint-text {
  font-size: 0.85rem;
  color: #fde047;
  margin-top: 0.5rem;
}

.lock-error {
  color: #f87171;
  font-size: 0.85rem;
  margin-top: 0.5rem;
}

.shake {
  animation: shake 0.4s ease;
}

@keyframes shake {
  0%, 100% { transform: translateX(0); }
  25% { transform: translateX(-8px); }
  75% { transform: translateX(8px); }
}

/* ==========================================================================
   NAVIGATION
   ========================================================================== */
.site-nav {
  position: fixed;
  top: 1rem;
  left: 50%;
  transform: translateX(-50%);
  z-index: 1000;
  background: var(--nav-bg);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border: 1px solid var(--card-border);
  padding: 0.4rem 0.6rem;
  border-radius: 999px;
  display: flex;
  align-items: center;
  gap: 0.4rem;
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
  transition: var(--transition-theme);
}

.nav-pill {
  padding: 0.5rem 1.2rem;
  border-radius: 999px;
  border: none;
  background: transparent;
  color: var(--text-main);
  font-size: 0.9rem;
  font-weight: 500;
  cursor: pointer;
  transition: all 0.25s ease;
  display: flex;
  align-items: center;
  gap: 0.4rem;
}

.nav-pill.active {
  background: #f43f5e;
  color: #fff;
  box-shadow: 0 4px 15px rgba(244, 63, 94, 0.35);
}

.nav-badge-alert {
  background: #f59e0b;
  color: #fff;
  font-size: 0.75rem;
  padding: 0.2rem 0.6rem;
  border-radius: 999px;
  animation: pulse 2s infinite;
}

@keyframes pulse {
  0%, 100% { transform: scale(1); }
  50% { transform: scale(1.05); }
}

/* ==========================================================================
   HERO
   ========================================================================== */
.hero-section {
  min-height: 85vh;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: 6rem 1.5rem 2rem;
  position: relative;
  z-index: 20;
}

.hero-subtitle {
  font-family: var(--font-cursive);
  font-size: 2.4rem;
  color: #f43f5e;
  margin-bottom: 0.5rem;
}

.hero-title {
  font-family: var(--font-serif);
  font-size: clamp(2.5rem, 6vw, 4.5rem);
  font-weight: 400;
  line-height: 1.15;
  margin-bottom: 1.2rem;
  letter-spacing: -0.5px;
}

.hero-description {
  max-width: 640px;
  font-size: 1.15rem;
  color: var(--text-muted);
  margin-bottom: 2.5rem;
}

.bday-countdown-strip {
  background: var(--card-bg);
  border: 1px solid var(--card-border);
  backdrop-filter: blur(12px);
  padding: 0.8rem 1.6rem;
  border-radius: 999px;
  display: flex;
  align-items: center;
  gap: 1.2rem;
  font-size: 0.95rem;
  box-shadow: 0 8px 25px rgba(0, 0, 0, 0.05);
}

.countdown-digits {
  display: flex;
  gap: 0.8rem;
  font-weight: 700;
  color: #f43f5e;
}

.scroll-indicator {
  margin-top: 3rem;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.85rem;
  color: var(--text-muted);
  animation: bounce 2s infinite;
}

@keyframes bounce {
  0%, 20%, 50%, 80%, 100% { transform: translateY(0); }
  40% { transform: translateY(-8px); }
  60% { transform: translateY(-4px); }
}

/* ==========================================================================
   CIRCULAR SPIRAL STAIRCASE OF MEMORIES (WIDE FRAMES, NO TIMELINE LINES)
   ========================================================================== */
.story-chapter {
  padding: 5rem 1.5rem;
  max-width: 1100px;
  margin: 0 auto;
  position: relative;
  z-index: 20;
}

.chapter-header {
  text-align: center;
  margin-bottom: 3.5rem;
}

.chapter-title {
  font-family: var(--font-serif);
  font-size: clamp(2.2rem, 4.5vw, 3.4rem);
  font-weight: 400;
  margin-bottom: 0.8rem;
}

.chapter-quote {
  font-family: var(--font-serif);
  font-style: italic;
  font-size: 1.25rem;
  color: var(--text-muted);
  max-width: 680px;
  margin: 0 auto;
}

.story-text-card {
  background: var(--card-bg);
  border: 1px solid var(--card-border);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  padding: 2.8rem;
  border-radius: 28px;
  box-shadow: 0 15px 35px rgba(0, 0, 0, 0.06);
  font-size: 1.15rem;
  margin: 3.5rem auto;
  max-width: 900px;
  position: relative;
  line-height: 1.95;
}

.story-text-card p {
  margin-bottom: 1.3rem;
}

.story-text-card p:last-child {
  margin-bottom: 0;
}

/* Spiral Staircase Container: NO vertical line, purely floating curved spiral steps */
/* ==========================================================================
   SNAKE-LIKE ROAD MAP & GLOWING LIGHT-TRAILS (REFERENCE: MOUNTAIN SWITCHBACK)
   ========================================================================== */
.spiral-staircase {
  position: relative;
  display: flex;
  flex-direction: column;
  width: 100%;
  max-width: 1100px;
  margin: 4.5rem auto;
  padding: 3rem 0;
  gap: 6rem;
  overflow: visible;
}

.spiral-staircase::before {
  display: none !important;
}

/* Winding Road SVG Overlay */
.road-svg-canvas {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
  z-index: 2;
  overflow: visible;
}

/* Base Photo Step on the Winding Road (Alternating Switchbacks) */
.spiral-step {
  position: relative;
  max-width: 480px;
  width: 47%;
  z-index: 10;
  transition: transform 0.4s cubic-bezier(0.34, 1.56, 0.64, 1), box-shadow 0.4s ease;
  will-change: transform;
}

.spiral-step::before, .spiral-step::after {
  display: none !important;
}

/* Left Switchback Hairpin (Odd Steps) */
.spiral-step:nth-child(odd) {
  align-self: flex-start;
  margin-left: 2%;
  margin-right: auto;
  transform: rotate(-2deg);
}

/* Right Switchback Hairpin (Even Steps) */
.spiral-step:nth-child(even) {
  align-self: flex-end;
  margin-right: 2%;
  margin-left: auto;
  transform: rotate(2deg);
}

/* Full Width Featured Video Landmark */
.spiral-step.spiral-landmark-full {
  align-self: center !important;
  margin: 4rem auto !important;
  max-width: 760px !important;
  width: 90% !important;
  transform: none !important;
}

/* Hover: Enlarge by EXACTLY 30% (scale 1.3), straighten, pop to front */
.spiral-step:hover {
  transform: scale(1.3) rotate(0deg) !important;
  z-index: 1000 !important;
  transition: transform 0.38s cubic-bezier(0.34, 1.56, 0.64, 1), box-shadow 0.38s ease !important;
}

.spiral-step:hover .spiral-card {
  box-shadow: 0 35px 85px rgba(0, 0, 0, 0.35), 0 15px 35px rgba(0, 0, 0, 0.2);
}

.spiral-step:hover .spiral-img-wrapper img,
.spiral-step:hover .spiral-img-wrapper video {
  transform: scale(1.04);
}

/* ==========================================================================
   ANIMATED WALKING COUPLE ALONG THE WINDING ROAD
   ========================================================================== */
.walking-couple-container {
  position: absolute;
  top: 0;
  left: 0;
  z-index: 100;
  pointer-events: none;
  transform-origin: center bottom;
  transition: transform 0.15s ease-out;
  will-change: transform;
}

.couple-avatar-wrap {
  position: relative;
  display: flex;
  flex-direction: column;
  align-items: center;
  transition: transform 0.3s cubic-bezier(0.34, 1.56, 0.64, 1);
  filter: drop-shadow(0 0 16px rgba(244, 63, 94, 0.5));
}

.couple-balloon {
  position: absolute;
  top: -12px;
  left: 50%;
  transform: translateX(-50%);
  font-size: 1.25rem;
  animation: floatHeartBalloon 1.8s infinite ease-in-out;
}

@keyframes floatHeartBalloon {
  0%, 100% { transform: translateX(-50%) translateY(0) scale(1); }
  50% { transform: translateX(-50%) translateY(-9px) scale(1.25); }
}

/* Walking Leg Swings */
@keyframes legWalkA {
  0%, 100% { transform: rotate(18deg); }
  50% { transform: rotate(-18deg); }
}

@keyframes legWalkB {
  0%, 100% { transform: rotate(-18deg); }
  50% { transform: rotate(18deg); }
}

.walk-leg-left {
  transform-origin: 33px 56px;
  animation: legWalkA 0.55s ease-in-out infinite;
}

.walk-leg-right {
  transform-origin: 39px 56px;
  animation: legWalkB 0.55s ease-in-out infinite;
}

.pulsing-heart {
  transform-origin: 50px 14px;
  animation: heartThrob 1.2s ease-in-out infinite;
}

@keyframes heartThrob {
  0%, 100% { transform: scale(1); }
  50% { transform: scale(1.3); }
}

/* Wide Polaroid Stair Card */
.spiral-card {
  background: #ffffff;
  padding: 1.4rem 1.4rem 1.8rem;
  border-radius: 22px;
  box-shadow: 0 20px 45px rgba(0, 0, 0, 0.12), 0 4px 12px rgba(0, 0, 0, 0.06);
  cursor: pointer;
  color: #1e293b;
  position: relative;
  overflow: hidden;
  width: 100%;
  transition: box-shadow 0.4s ease;
}

.spiral-img-wrapper {
  width: 100%;
  aspect-ratio: 16 / 11;
  border-radius: 14px;
  overflow: hidden;
  background: #f1f5f9;
}

.spiral-img-wrapper img, .spiral-img-wrapper video {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
  transition: transform 0.4s ease;
}

.spiral-caption {
  font-family: var(--font-serif);
  font-size: 1.15rem;
  line-height: 1.5;
  margin-top: 1.1rem;
  text-align: center;
  color: #334155;
  font-style: italic;
}

/* ==========================================================================
   UNFOLDING LOVE LETTER
   ========================================================================== */
.envelope-section {
  text-align: center;
  margin: 5rem 0;
}

.interactive-envelope-trigger {
  display: inline-flex;
  flex-direction: column;
  align-items: center;
  gap: 0.8rem;
  cursor: pointer;
  padding: 1.5rem 2.5rem;
  background: var(--card-bg);
  border: 1px solid var(--card-border);
  border-radius: 24px;
  box-shadow: 0 15px 35px rgba(0, 0, 0, 0.1);
  transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.interactive-envelope-trigger:hover {
  transform: translateY(-4px) scale(1.02);
  box-shadow: 0 20px 45px rgba(0, 0, 0, 0.15);
}

.wax-seal-icon {
  width: 68px;
  height: 68px;
  background: #e11d48;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  font-size: 1.8rem;
  box-shadow: 0 6px 20px rgba(225, 29, 72, 0.4);
  animation: pulseSeal 2.5s infinite;
}

@keyframes pulseSeal {
  0%, 100% { transform: scale(1); }
  50% { transform: scale(1.08); }
}

.unfolded-parchment-letter {
  background: #fffdfa;
  border: 1px solid #fed7aa;
  padding: 3.5rem 3rem;
  border-radius: 24px;
  box-shadow: 0 25px 60px rgba(0, 0, 0, 0.15);
  max-width: 800px;
  margin: 2.5rem auto 0;
  text-align: left;
  position: relative;
  color: #292524;
  line-height: 2;
  font-family: var(--font-serif);
  font-size: 1.25rem;
  animation: unfoldLetter 0.8s cubic-bezier(0.16, 1, 0.3, 1) forwards;
}

@keyframes unfoldLetter {
  from { opacity: 0; transform: scaleY(0.7) translateY(20px); }
  to { opacity: 1; transform: scaleY(1) translateY(0); }
}

/* Flying Hearts and Kisses Burst Emitter */
.burst-heart-kiss {
  position: fixed;
  z-index: 99999;
  font-size: clamp(1.6rem, 3vw, 2.5rem);
  pointer-events: none;
  user-select: none;
  will-change: transform, opacity;
  filter: drop-shadow(0 0 10px rgba(244, 63, 94, 0.45));
}

@keyframes heartKissBurst {
  0% {
    transform: translate(-50%, -50%) scale(0.2) rotate(0deg);
    opacity: 0;
  }
  15% {
    opacity: 1;
    transform: translate(-50%, -50%) scale(1.4) rotate(var(--brot));
  }
  65% {
    opacity: 0.95;
    transform: translate(calc(-50% + var(--bx)), calc(-50% + var(--by))) scale(1.1) rotate(var(--brot));
  }
  100% {
    opacity: 0;
    transform: translate(calc(-50% + var(--bx)), calc(-50% + var(--by) - 45px)) scale(0.6) rotate(var(--brot));
  }
}

/* ==========================================================================
   25TH BIRTHDAY CELEBRATION VIEW
   ========================================================================== */
.birthday-view-container {
  max-width: 900px;
  margin: 5rem auto 3rem;
  padding: 2rem 1.5rem;
  text-align: center;
  position: relative;
  z-index: 20;
}

.birthday-hero-title {
  font-family: var(--font-serif);
  font-size: clamp(2.8rem, 6vw, 4.5rem);
  color: #f43f5e;
  line-height: 1.2;
  margin-bottom: 0.5rem;
}

.birthday-date-tag {
  font-size: 1.1rem;
  color: #f59e0b;
  font-weight: 600;
  letter-spacing: 1px;
  margin-bottom: 2.5rem;
}

.cake-container {
  margin: 2.5rem auto;
  cursor: pointer;
  display: inline-block;
}

.cake-graphic {
  position: relative;
  width: 160px;
  margin: 0 auto;
}

.candle-flame {
  width: 16px;
  height: 28px;
  background: radial-gradient(ellipse at bottom, #fde047 0%, #ea580c 100%);
  border-radius: 50% 50% 20% 20%;
  margin: 0 auto 4px;
  box-shadow: 0 0 20px #f59e0b, 0 0 35px #ea580c;
  animation: flicker 1s infinite alternate;
  transition: opacity 0.5s ease, transform 0.5s ease;
}

.candle-flame.blown-out {
  opacity: 0;
  transform: scale(0.2) translateY(-10px);
}

.candle-smoke {
  width: 6px;
  height: 20px;
  background: rgba(255, 255, 255, 0.6);
  border-radius: 50%;
  margin: 0 auto;
  opacity: 0;
  transition: opacity 1s ease;
}

.candle-smoke.active {
  opacity: 0.8;
  animation: smokeRise 2s forwards;
}

@keyframes flicker {
  0% { transform: scale(1) rotate(-1deg); }
  100% { transform: scale(1.08) rotate(1deg); }
}

@keyframes smokeRise {
  0% { transform: translateY(0) scale(1); opacity: 0.8; }
  100% { transform: translateY(-30px) scale(2); opacity: 0; }
}

.cake-wish-banner {
  font-size: 0.95rem;
  color: var(--text-muted);
  margin-top: 1rem;
}

.birthday-letter-card {
  background: var(--card-bg);
  border: 1px solid var(--card-border);
  backdrop-filter: blur(16px);
  padding: 3rem 2.5rem;
  border-radius: 28px;
  box-shadow: 0 20px 50px rgba(0, 0, 0, 0.08);
  text-align: left;
  line-height: 1.9;
  font-size: 1.15rem;
  margin-top: 3rem;
}

.bday-poem-box {
  background: rgba(244, 63, 94, 0.06);
  border-left: 4px solid #f43f5e;
  padding: 1.5rem 2rem;
  border-radius: 0 16px 16px 0;
  margin: 2rem 0;
  font-family: var(--font-serif);
  font-style: italic;
  font-size: 1.25rem;
  line-height: 1.9;
}

/* ==========================================================================
   LIGHTBOX MODAL
   ========================================================================== */
#lightbox-modal {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.92);
  backdrop-filter: blur(14px);
  z-index: 20000;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 2rem 1.5rem;
}

.lightbox-content {
  max-width: 90vw;
  max-height: 80vh;
  display: flex;
  flex-direction: column;
  align-items: center;
}

.lightbox-content img, .lightbox-content video {
  max-width: 100%;
  max-height: 75vh;
  border-radius: 12px;
  box-shadow: 0 20px 50px rgba(0, 0, 0, 0.6);
}

.lightbox-caption {
  color: #f1f5f9;
  font-family: var(--font-serif);
  font-size: 1.2rem;
  margin-top: 1.2rem;
  text-align: center;
  max-width: 700px;
}

.lightbox-close {
  position: absolute;
  top: 1.5rem;
  right: 1.5rem;
  background: rgba(255, 255, 255, 0.15);
  border: none;
  color: #fff;
  width: 44px;
  height: 44px;
  border-radius: 50%;
  font-size: 1.5rem;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: background 0.2s ease;
}

.lightbox-close:hover {
  background: rgba(244, 63, 94, 0.8);
}

/* ==========================================================================
   MOBILE RESPONSIVENESS
   ========================================================================== */
@media (max-width: 768px) {
  .site-nav {
    top: auto;
    bottom: 1.5rem;
    padding: 0.3rem 0.5rem;
  }

  .nav-pill {
    padding: 0.4rem 0.9rem;
    font-size: 0.8rem;
  }

  .hero-section {
    padding-top: 4rem;
  }

  .story-chapter {
    padding: 3rem 1rem;
  }

  .spiral-step {
    max-width: 100% !important;
    width: 96% !important;
    transform: none !important;
    opacity: 1 !important;
  }

  .spiral-step:hover {
    transform: scale(1.05) !important;
  }

  .birthday-letter-card {
    padding: 2rem 1.5rem;
  }

  .unfolded-parchment-letter {
    padding: 2rem 1.5rem;
  }
}