/* =================================================================
   FOR YOU — A LETTER FROM MY HEART
   Mobile-first stylesheet.
   Base rules below target small phones; layout is enhanced upward
   through min-width media queries for tablet / laptop / desktop.
   ================================================================= */

/* -----------------------------------------------------------------
   0. TOKENS
   ----------------------------------------------------------------- */
:root{
  /* -- color: night sky --------------------------------------- */
  --bg-deep:        #0B1020;
  --bg-blue:        #121A33;
  --bg-purple:      #251C3F;
  --bg-lavender:    #3A2D58;

  --accent-rose:    #E7A9B6;
  --accent-rose-soft: rgba(231, 169, 182, .38);

  --text-warm:      #F6F1E9;
  --text-muted:     #C9C2D9;
  --text-faint:     rgba(246, 241, 233, .56);

  --glass-bg:       rgba(255, 255, 255, .055);
  --glass-bg-soft:  rgba(255, 255, 255, .035);
  --glass-border:   rgba(255, 255, 255, .12);
  --glass-shadow:   0 24px 60px -24px rgba(0, 0, 0, .65);

  --paper-bg:       #f4ead9;
  --paper-bg-2:     #ece0c9;
  --paper-ink:      #3c3026;

  /* -- type ------------------------------------------------------ */
  --font-display:   'Cormorant Garamond', 'Times New Roman', serif;
  --font-body:       'Outfit', -apple-system, BlinkMacSystemFont, sans-serif;
  --font-script:     'Caveat', cursive;

  /* -- motion ------------------------------------------------------ */
  --ease-slow:      cubic-bezier(.22, 1, .36, 1);
  --dur-slow:       1.05s;
  --dur-med:        .55s;
  --dur-fast:       .28s;

  /* -- layout ------------------------------------------------------ */
  --container:      640px;
  --radius-lg:      26px;
  --radius-md:      18px;
  --radius-sm:      12px;
  --gutter:         20px;
}

/* -----------------------------------------------------------------
   1. RESET & BASE
   ----------------------------------------------------------------- */
*, *::before, *::after{ box-sizing: border-box; }

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

body{
  margin: 0;
  background: var(--bg-deep);
  color: var(--text-warm);
  font-family: var(--font-body);
  font-weight: 300;
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

img{ max-width: 100%; display: block; }
button{ font: inherit; color: inherit; background: none; border: none; cursor: pointer; }
a{ color: inherit; }
h1, h2, h3, p{ margin: 0; }

::selection{ background: var(--accent-rose-soft); color: var(--text-warm); }

/* Hide scroll while the loading screen is active */
body.is-locked{ overflow: hidden; height: 100vh; }

.eyebrow{
  display: block;
  font-size: .72rem;
  letter-spacing: .22em;
  text-transform: uppercase;
  color: var(--accent-rose);
  font-weight: 400;
  margin-bottom: 14px;
  opacity: .85;
}

/* -----------------------------------------------------------------
   2. AMBIENT BACKDROP — gradient, particles, stars
   ----------------------------------------------------------------- */
.ambient{
  position: fixed;
  inset: 0;
  z-index: 0;
  overflow: hidden;
  pointer-events: none;
}

.ambient-gradient{
  position: absolute;
  inset: -15%;
  background:
    radial-gradient(circle at 18% 18%, var(--bg-purple), transparent 55%),
    radial-gradient(circle at 82% 28%, var(--bg-blue), transparent 55%),
    radial-gradient(circle at 50% 92%, var(--bg-lavender), transparent 60%),
    var(--bg-deep);
  background-size: 180% 180%;
  animation: gradientDrift 50s ease-in-out infinite alternate;
}

@keyframes gradientDrift{
  0%   { background-position: 0% 0%, 100% 10%, 50% 100%; }
  100% { background-position: 12% 8%, 86% 22%, 56% 90%;  }
}

.ambient-particle{
  position: absolute;
  border-radius: 50%;
  filter: blur(60px);
  opacity: .28;
  will-change: transform;
}
.ambient-particle--1{
  width: 260px; height: 260px;
  top: 6%; left: -8%;
  background: var(--accent-rose);
  animation: floatSlow 46s ease-in-out infinite;
}
.ambient-particle--2{
  width: 320px; height: 320px;
  top: 38%; right: -10%;
  background: var(--bg-lavender);
  animation: floatSlow 60s ease-in-out infinite reverse;
}
.ambient-particle--3{
  width: 220px; height: 220px;
  bottom: 4%; left: 18%;
  background: var(--bg-blue);
  animation: floatSlow 54s ease-in-out infinite;
}

@keyframes floatSlow{
  0%, 100%{ transform: translate(0, 0); }
  50%     { transform: translate(26px, -34px); }
}

.stars-field{
  position: absolute;
  inset: 0;
}

.star{
  position: absolute;
  border-radius: 50%;
  background: #fff;
  box-shadow: 0 0 6px 1px rgba(255,255,255,.5);
  animation: twinkle var(--dur, 4s) ease-in-out infinite;
  animation-delay: var(--delay, 0s);
}

@keyframes twinkle{
  0%, 100%{ opacity: .18; transform: scale(.75); }
  50%     { opacity: .95; transform: scale(1.15); }
}

/* -----------------------------------------------------------------
   3. PROGRESS THREAD — a quiet thread of stars marking your place
   ----------------------------------------------------------------- */
.progress-thread{
  position: fixed;
  top: 0; left: 0; right: 0;
  height: 2px;
  background: rgba(255,255,255,.08);
  z-index: 60;
}
.progress-thread__fill{
  height: 100%;
  width: 0%;
  background: linear-gradient(90deg, var(--accent-rose), var(--bg-lavender));
  box-shadow: 0 0 12px 1px var(--accent-rose-soft);
  transition: width .15s linear;
}
.progress-thread__dot{
  position: absolute;
  top: 50%; left: 0%;
  width: 7px; height: 7px;
  border-radius: 50%;
  background: var(--text-warm);
  box-shadow: 0 0 8px 2px var(--accent-rose);
  transform: translate(-50%, -50%);
  transition: left .15s linear;
}

/* -----------------------------------------------------------------
   4. LOADING SCREEN
   ----------------------------------------------------------------- */
.loading-screen{
  position: fixed;
  inset: 0;
  z-index: 200;
  display: flex;
  align-items: center;
  justify-content: center;
  background: #04050b;
  transition: opacity 1.2s var(--ease-slow), visibility 1.2s var(--ease-slow);
}
.loading-screen.is-hidden{
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
}

.loading-content{
  text-align: center;
  padding: 0 28px;
}

.loading-line{
  font-family: var(--font-display);
  font-style: italic;
  font-size: clamp(1.25rem, 5.4vw, 1.7rem);
  color: var(--text-warm);
  opacity: 0;
  transform: translateY(10px);
  transition: opacity 1.4s var(--ease-slow), transform 1.4s var(--ease-slow);
  margin-bottom: 10px;
}
.loading-line.is-visible{ opacity: .92; transform: translateY(0); }

.btn-continue{
  position: relative;
  overflow: hidden;
  margin-top: 38px;
  padding: 14px 38px;
  border-radius: 999px;
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  backdrop-filter: blur(12px);
  color: var(--text-warm);
  font-size: .85rem;
  letter-spacing: .12em;
  text-transform: uppercase;
  opacity: 0;
  transform: translateY(10px);
  transition: opacity 1.2s var(--ease-slow) .3s, transform 1.2s var(--ease-slow) .3s,
              background var(--dur-fast) ease, box-shadow var(--dur-fast) ease;
}
.btn-continue.is-visible{ opacity: 1; transform: translateY(0); }
.btn-continue:hover{
  background: rgba(255,255,255,.1);
  box-shadow: 0 0 28px var(--accent-rose-soft);
}
.btn-continue span{ position: relative; z-index: 1; }

.ripple{
  position: absolute;
  border-radius: 50%;
  background: rgba(255,255,255,.35);
  transform: scale(0);
  animation: rippleOut .65s ease-out forwards;
  pointer-events: none;
}
@keyframes rippleOut{
  to{ transform: scale(3.2); opacity: 0; }
}

/* -----------------------------------------------------------------
   5. SHARED LAYOUT HELPERS
   ----------------------------------------------------------------- */
main{ position: relative; z-index: 1; }

section{
  position: relative;
  padding: 92px var(--gutter) ;
}

.section-heading{
  max-width: var(--container);
  margin: 0 auto 48px;
  text-align: center;
}
.section-heading h2{
  font-family: var(--font-display);
  font-weight: 500;
  font-size: clamp(2rem, 7vw, 2.7rem);
  margin-bottom: 14px;
}
.section-sub{
  color: var(--text-muted);
  font-size: .98rem;
  max-width: 440px;
  margin: 0 auto;
}

/* Scroll-reveal: fades up gently as each element enters view */
.reveal{
  opacity: 0;
  transform: translateY(30px);
  transition: opacity var(--dur-slow) var(--ease-slow),
              transform var(--dur-slow) var(--ease-slow);
}
.reveal.is-visible{ opacity: 1; transform: translateY(0); }

/* Photo placeholder framing, shared by hero + memory sections */
.photo-frame{
  position: relative;
  overflow: hidden;
  border-radius: var(--radius-lg);
  background: var(--glass-bg-soft);
  border: 1px solid var(--glass-border);
  box-shadow: var(--glass-shadow);
}
.photo-frame img{
  width: 100%;
  height: auto;
  display: block;
  transition: transform 1.4s var(--ease-slow);
}
.photo-frame:hover img{ transform: scale(1.045); }

.photo-tag{
  display: block;
  text-align: center;
  margin-top: 12px;
  font-size: .72rem;
  letter-spacing: .08em;
  text-transform: uppercase;
  color: var(--text-faint);
}

/* -----------------------------------------------------------------
   6. HERO
   ----------------------------------------------------------------- */
.hero{
  min-height: 100vh;
  display: flex;
  align-items: center;
  padding-top: 64px;
  padding-bottom: 64px;
}
.hero__inner{
  max-width: var(--container);
  margin: 0 auto;
  text-align: center;
}

.hero__photo-wrap{
  max-width: 260px;
  margin: 0 auto 36px;
}

.hero__title{
  font-family: var(--font-display);
  font-weight: 500;
  font-size: clamp(2.3rem, 10vw, 4rem);
  line-height: 1.12;
  margin-bottom: 22px;
}

.hero__text{
  color: var(--text-muted);
  font-size: 1rem;
  max-width: 420px;
  margin: 0 auto 36px;
}

.scroll-cue{
  margin-top: 56px;
  display: flex;
  justify-content: center;
}
.scroll-cue span{
  width: 14px; height: 22px;
  border: 1.4px solid var(--text-faint);
  border-radius: 10px;
  position: relative;
  display: block;
}
.scroll-cue span::before{
  content: '';
  position: absolute;
  top: 4px; left: 50%;
  width: 3px; height: 3px;
  border-radius: 50%;
  background: var(--accent-rose);
  transform: translateX(-50%);
  animation: scrollDot 2.4s ease-in-out infinite;
}
@keyframes scrollDot{
  0%   { top: 4px;  opacity: 1; }
  70%  { top: 13px; opacity: 0; }
  100% { top: 4px;  opacity: 0; }
}

/* -----------------------------------------------------------------
   7. MUSIC PLAYER (reusable, glassmorphism)
   ----------------------------------------------------------------- */
.music-player{
  display: flex;
  align-items: center;
  gap: 14px;
  max-width: 420px;
  margin: 0 auto;
  padding: 12px 16px;
  border-radius: 999px;
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  backdrop-filter: blur(16px) saturate(140%);
  -webkit-backdrop-filter: blur(16px) saturate(140%);
  box-shadow: var(--glass-shadow);
  transition: box-shadow var(--dur-med) ease, border-color var(--dur-med) ease;
}
.music-player:hover{
  border-color: rgba(255,255,255,.2);
  box-shadow: 0 0 0 1px rgba(255,255,255,.04), 0 26px 60px -24px rgba(0,0,0,.7), 0 0 30px -6px var(--accent-rose-soft);
}

.music-player__toggle{
  flex: 0 0 auto;
  width: 38px; height: 38px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(255,255,255,.08);
  border: 1px solid var(--glass-border);
  position: relative;
  overflow: hidden;
  transition: background var(--dur-fast) ease, transform var(--dur-fast) ease;
}
.music-player__toggle:hover{ background: rgba(255,255,255,.14); }
.music-player__toggle:active{ transform: scale(.92); }

.music-player__toggle .icon{ width: 16px; height: 16px; fill: var(--text-warm); }
.music-player__toggle .icon--pause{ display: none; }
.music-player.is-playing .icon--play{ display: none; }
.music-player.is-playing .icon--pause{ display: block; }

.music-player__art{
  flex: 0 0 auto;
  width: 34px; height: 34px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  background: radial-gradient(circle at 35% 30%, var(--bg-lavender), var(--bg-purple));
  color: var(--accent-rose);
  border: 1px solid var(--glass-border);
  animation: spinSlow 9s linear infinite;
  animation-play-state: paused;
}
.music-player__art svg{ width: 15px; height: 15px; }
.music-player.is-playing .music-player__art{ animation-play-state: running; }

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

.music-player__body{ flex: 1 1 auto; min-width: 0; }

.music-player__title{
  font-size: .82rem;
  color: var(--text-warm);
  margin-bottom: 6px;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.music-player__scrub{
  display: flex;
  align-items: center;
  gap: 8px;
}

.music-player__time{
  font-size: .66rem;
  color: var(--text-faint);
  font-variant-numeric: tabular-nums;
  flex: 0 0 auto;
}

.music-player__bar{
  flex: 1 1 auto;
  position: relative;
  height: 14px;
  display: flex;
  align-items: center;
  cursor: pointer;
}
.music-player__bar::before{
  content: '';
  position: absolute;
  left: 0; right: 0; top: 50%;
  height: 2.5px;
  background: rgba(255,255,255,.16);
  border-radius: 2px;
  transform: translateY(-50%);
}
.music-player__bar-fill{
  position: absolute;
  left: 0; top: 50%;
  height: 2.5px;
  width: 0%;
  background: linear-gradient(90deg, var(--accent-rose), var(--text-warm));
  border-radius: 2px;
  transform: translateY(-50%);
}
.music-player__bar-handle{
  position: absolute;
  top: 50%; left: 0%;
  width: 8px; height: 8px;
  border-radius: 50%;
  background: var(--text-warm);
  box-shadow: 0 0 6px 1px var(--accent-rose-soft);
  transform: translate(-50%, -50%);
}

/* -----------------------------------------------------------------
   8. MEMORY SECTIONS
   ----------------------------------------------------------------- */
.memory__grid{
  max-width: 1100px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 36px;
}

.memory__content{
  text-align: center;
}

.memory__index{
  display: block;
  font-size: .72rem;
  letter-spacing: .2em;
  text-transform: uppercase;
  color: var(--accent-rose);
  opacity: .85;
  margin-bottom: 10px;
}

.memory__title{
  font-family: var(--font-display);
  font-weight: 500;
  font-size: clamp(1.7rem, 6vw, 2.3rem);
  margin-bottom: 16px;
}

.memory__text{
  color: var(--text-muted);
  max-width: 460px;
  margin: 0 auto 28px;
}

/* -----------------------------------------------------------------
   9. GALLERY — column-based masonry, true aspect ratio, no cropping
   ----------------------------------------------------------------- */
.gallery-grid{
  max-width: 1100px;
  margin: 0 auto;
  columns: 2;
  column-gap: 12px;
}

.gallery-item{
  display: block;
  width: 100%;
  margin: 0 0 12px;
  break-inside: avoid;
  -webkit-column-break-inside: avoid;
  border-radius: var(--radius-md);
  overflow: hidden;
  background: var(--glass-bg-soft);
  border: 1px solid var(--glass-border);
  box-shadow: var(--glass-shadow);
  transition: transform var(--dur-med) var(--ease-slow), box-shadow var(--dur-med) ease;
}
.gallery-item:hover{
  transform: translateY(-3px);
  box-shadow: 0 30px 60px -26px rgba(0,0,0,.7), 0 0 26px -6px var(--accent-rose-soft);
}
.gallery-item img{
  width: 100%;
  height: auto;
  display: block;
  transition: transform 1.2s var(--ease-slow);
}
.gallery-item:hover img{ transform: scale(1.05); }

/* -----------------------------------------------------------------
   10. LIGHTBOX
   ----------------------------------------------------------------- */
.lightbox{
  position: fixed;
  inset: 0;
  z-index: 150;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(5, 5, 14, .92);
  backdrop-filter: blur(6px);
  opacity: 0;
  visibility: hidden;
  transition: opacity var(--dur-med) ease, visibility var(--dur-med) ease;
}
.lightbox.is-open{ opacity: 1; visibility: visible; }

.lightbox__img{
  max-width: 88vw;
  max-height: 80vh;
  border-radius: var(--radius-sm);
  box-shadow: 0 30px 80px -20px rgba(0,0,0,.8);
  object-fit: contain;
  transform: scale(.92);
  opacity: 0;
  transition: transform var(--dur-med) var(--ease-slow), opacity var(--dur-med) var(--ease-slow);
}
.lightbox.is-open .lightbox__img{ transform: scale(1); opacity: 1; }

.lightbox__close,
.lightbox__nav{
  position: absolute;
  display: flex;
  align-items: center;
  justify-content: center;
  width: 42px; height: 42px;
  border-radius: 50%;
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  backdrop-filter: blur(10px);
  color: var(--text-warm);
  transition: background var(--dur-fast) ease, transform var(--dur-fast) ease;
}
.lightbox__close svg, .lightbox__nav svg{ width: 18px; height: 18px; }
.lightbox__close:hover, .lightbox__nav:hover{ background: rgba(255,255,255,.16); }
.lightbox__close:active, .lightbox__nav:active{ transform: scale(.92); }

.lightbox__close{ top: 18px; right: 18px; }
.lightbox__nav--prev{ left: 12px; top: 50%; transform: translateY(-50%); }
.lightbox__nav--next{ right: 12px; top: 50%; transform: translateY(-50%); }

/* -----------------------------------------------------------------
   11. LETTER SECTION — handwritten-style paper card
   ----------------------------------------------------------------- */
.letter-section{
  display: flex;
  justify-content: center;
  padding-top: 70px;
  padding-bottom: 70px;
}

.letter-glow{
  position: absolute;
  top: 8%;
  left: 50%;
  width: 360px; height: 360px;
  background: radial-gradient(circle, var(--accent-rose-soft), transparent 65%);
  transform: translateX(-50%);
  filter: blur(40px);
  z-index: 0;
}

.letter-card{
  position: relative;
  z-index: 1;
  max-width: 480px;
  width: 100%;
  background: linear-gradient(165deg, var(--paper-bg), var(--paper-bg-2));
  color: var(--paper-ink);
  border-radius: 8px;
  padding: 42px 30px 36px;
  box-shadow: 0 30px 70px -24px rgba(0,0,0,.55), inset 0 0 0 1px rgba(255,255,255,.4);
  transform: rotate(-0.6deg);
}

.letter-card__greeting{
  font-family: var(--font-script);
  font-size: 1.9rem;
  margin-bottom: 18px;
}

.letter-card__body{
  font-family: var(--font-script);
  font-size: 1.32rem;
  line-height: 1.85;
}
.letter-card__body p{ margin-bottom: 18px; }

.letter-card__sign{
  font-family: var(--font-script);
  font-size: 1.5rem;
  text-align: right;
  margin-top: 12px;
}

/* -----------------------------------------------------------------
   12. ENDING
   ----------------------------------------------------------------- */
.ending-section{
  min-height: 90vh;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
}

.heart-wrap{ margin-bottom: 28px; }

.beating-heart{
  width: 46px; height: 46px;
  fill: var(--accent-rose);
  filter: drop-shadow(0 0 14px var(--accent-rose-soft));
  animation: heartbeat 2.6s ease-in-out infinite;
  transform-origin: center;
}
@keyframes heartbeat{
  0%, 100%{ transform: scale(1); }
  15%     { transform: scale(1.16); }
  30%     { transform: scale(1); }
  45%     { transform: scale(1.1); }
  60%     { transform: scale(1); }
}

.ending-text{
  max-width: 440px;
  color: var(--text-muted);
  font-size: 1.02rem;
  margin-bottom: 18px;
}

.ending-credit{
  font-family: var(--font-display);
  font-style: italic;
  color: var(--text-faint);
  font-size: .95rem;
}

/* -----------------------------------------------------------------
   13. REDUCED MOTION
   ----------------------------------------------------------------- */
@media (prefers-reduced-motion: reduce){
  html{ scroll-behavior: auto; }
  .ambient-gradient,
  .ambient-particle,
  .star,
  .beating-heart,
  .music-player__art,
  .scroll-cue span::before{
    animation: none !important;
  }
  .reveal{ transition: opacity .4s ease; transform: none; }
  .photo-frame img,
  .gallery-item img,
  .gallery-item{ transition: none; }
}

/* ===================================================================
   RESPONSIVE — enhancements upward from mobile base
   =================================================================== */

/* ---- small tablet / large phone ---------------------------------- */
@media (min-width: 600px){
  :root{ --container: 720px; --gutter: 32px; }

  .gallery-grid{ columns: 3; column-gap: 16px; }
  .gallery-item{ margin-bottom: 16px; }

  .hero__photo-wrap{ max-width: 300px; }
}

/* ---- tablet: memory sections become side-by-side ------------------ */
@media (min-width: 760px){
  section{ padding: 120px var(--gutter); }

  .memory__grid{
    flex-direction: row;
    align-items: center;
    gap: 60px;
  }
  .memory__photo-wrap{ flex: 1 1 50%; }
  .memory__content{ flex: 1 1 50%; text-align: left; }
  .memory__text{ margin-left: 0; margin-right: 0; }
  .music-player{ margin-left: 0; }

  .memory--reverse .memory__grid{ flex-direction: row-reverse; }

  .letter-card{ padding: 56px 48px 48px; }
}

/* ---- laptop --------------------------------------------------------*/
@media (min-width: 1000px){
  :root{ --container: 760px; }

  .gallery-grid{ columns: 4; column-gap: 18px; }
  .gallery-item{ margin-bottom: 18px; }

  .hero__title{ letter-spacing: .01em; }
}

/* ---- desktop ---------------------------------------------------------*/
@media (min-width: 1280px){
  main{ max-width: 1320px; margin: 0 auto; }
}

/* ---- fine pointer: richer hover on music player handle ------------- */
@media (hover: hover){
  .music-player__bar-handle{ opacity: 0; transition: opacity var(--dur-fast) ease; }
  .music-player__bar:hover .music-player__bar-handle{ opacity: 1; }
}