/* ===================================================
   1. REGISTRASI FONT LOKAL (.woff2)
   =================================================== */
@font-face {
  font-family: 'Reenie Beanie';
  src: url('fonts/reenie-beanie.woff2') format('woff2');
  font-weight: 400;
  font-style: normal;
  font-display: swap;
}

@font-face {
  font-family: 'Plus Jakarta Sans';
  src: url('fonts/plus-jakarta-sans-400-normal.woff2') format('woff2');
  font-weight: 400;
  font-style: normal;
  font-display: swap;
}

@font-face {
  font-family: 'Plus Jakarta Sans';
  src: url('fonts/plus-jakarta-sans-500-normal.woff2') format('woff2');
  font-weight: 500;
  font-style: normal;
  font-display: swap;
}

@font-face {
  font-family: 'Plus Jakarta Sans';
  src: url('fonts/plus-jakarta-sans-600-normal.woff2') format('woff2');
  font-weight: 600;
  font-style: normal;
  font-display: swap;
}

/* ===================================================
   2. VARIABEL TEMA & PENGATURAN INTRO BLUR
   =================================================== */
:root {
  /* Pengaturan Blur Glassmorphism Intro */
  --intro-blur: 24px;
  --intro-bg: rgba(248, 250, 252, 0.65);

  --bg-page: #F8FAFC;
  --glass-bg: rgba(255, 255, 255, 0.62);
  --glass-bg-strong: rgba(255, 255, 255, 0.85);
  --glass-border: rgba(255, 255, 255, 0.9);
  --glass-border-subtle: rgba(226, 232, 240, 0.75);
  --glass-shadow-sm: 0 4px 16px 0 rgba(15, 23, 42, 0.04);
  --glass-shadow-md: 0 12px 32px 0 rgba(15, 23, 42, 0.07);
  --glass-shadow-lg: 0 20px 48px -10px rgba(15, 23, 42, 0.12);
  
  --text-main: #0F172A;
  --text-sub: #475569;
  --text-muted: #94A3B8;
  
  --font-hand: 'Reenie Beanie', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --font-sans: 'Plus Jakarta Sans', system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
}

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

html, body {
  width: 100%;
  max-width: 100%;
  overflow-x: hidden;
  scroll-behavior: smooth;
  -webkit-user-select: none;
  -moz-user-select: none;
  -ms-user-select: none;
  user-select: none;
  -webkit-touch-callout: none;
  -webkit-tap-highlight-color: transparent;
}

body {
  background-color: var(--bg-page);
  background-image: 
    radial-gradient(at 10% 10%, rgba(226, 232, 240, 0.75) 0px, transparent 45%),
    radial-gradient(at 90% 15%, rgba(203, 213, 225, 0.6) 0px, transparent 40%),
    radial-gradient(at 50% 50%, rgba(241, 245, 249, 0.9) 0px, transparent 60%),
    radial-gradient(at 85% 85%, rgba(226, 232, 240, 0.7) 0px, transparent 45%),
    radial-gradient(at 15% 90%, rgba(203, 213, 225, 0.5) 0px, transparent 45%);
  background-attachment: fixed;
  background-size: cover;
  color: var(--text-main);
  font-family: var(--font-sans);
  line-height: 1.6;
  min-height: 100vh;
  -webkit-font-smoothing: antialiased;
}

img {
  -webkit-user-drag: none;
  user-drag: none;
}

input, textarea {
  -webkit-user-select: text;
  -moz-user-select: text;
  -ms-user-select: text;
  user-select: text;
}

.container {
  width: 100%;
  max-width: 1140px;
  margin: 0 auto;
  padding: 0 1.25rem;
}

@media (min-width: 768px) {
  .container {
    padding: 0 1.75rem;
  }
}

/* ===================================================
   3. INTRO SCREEN & APPLE TEXT ANIMATION
   =================================================== */
.intro-overlay {
  position: fixed;
  inset: 0;
  width: 100vw;
  height: 100vh;
  z-index: 9999;
  background-color: var(--intro-bg);
  backdrop-filter: blur(var(--intro-blur));
  -webkit-backdrop-filter: blur(var(--intro-blur));
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 1;
  visibility: visible;
  pointer-events: auto;
}

.intro-overlay.intro-hidden {
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
}

/* Container transparan tanpa batas/kotak */
.intro-glass-card {
  background: transparent;
  backdrop-filter: none;
  -webkit-backdrop-filter: none;
  border: none;
  box-shadow: none;
  padding: 0;
}

/* Tipografi & Apple-Style Reveal Animation */
.intro-text {
  font-family: var(--font-sans);
  font-size: clamp(1.5rem, 4vw, 2.2rem);
  font-weight: 700;
  color: var(--text-main);
  text-align: center;
  white-space: nowrap;
  opacity: 0;
  animation: appleTextReveal 1.1s cubic-bezier(0.16, 1, 0.3, 1) forwards;
  will-change: transform, opacity, filter;
  text-shadow: 0 4px 20px rgba(15, 23, 42, 0.08);
}

@keyframes appleTextReveal {
  0% {
    opacity: 0;
    filter: blur(14px);
    transform: translateY(22px) scale(0.95);
    letter-spacing: 0.02em;
  }
  60% {
    opacity: 1;
  }
  100% {
    opacity: 1;
    filter: blur(0px);
    transform: translateY(0) scale(1);
    letter-spacing: -0.025em;
  }
}

/* ===================================================
   4. RESPONSIVE NAVBAR
   =================================================== */
.navbar {
  position: sticky;
  top: 0;
  z-index: 40;
  background: rgba(255, 255, 255, 0.72);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--glass-border);
  box-shadow: 0 4px 20px rgba(15, 23, 42, 0.02);
  width: 100%;
}

.nav-container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 4.25rem;
  gap: 0.75rem;
}

.logo {
  font-family: var(--font-sans);
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--text-main);
  text-decoration: none;
  letter-spacing: -0.02em;
  white-space: nowrap;
  flex-shrink: 0;
  line-height: 1;
}

.nav-right {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  flex-shrink: 0;
}

.nav-link {
  color: var(--text-sub);
  text-decoration: none;
  font-size: 0.88rem;
  font-weight: 500;
  transition: color 0.15s ease;
  white-space: nowrap;
}

.nav-link:hover {
  color: var(--text-main);
}

.nav-btn {
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
  background-color: var(--text-main);
  color: #FFFFFF;
  padding: 0.5rem 1rem;
  border-radius: 9999px;
  font-size: 0.82rem;
  font-weight: 500;
  text-decoration: none;
  white-space: nowrap;
  flex-shrink: 0;
  box-shadow: 0 4px 12px rgba(15, 23, 42, 0.15);
  transition: transform 0.25s cubic-bezier(0.34, 1.56, 0.64, 1), background-color 0.2s ease, box-shadow 0.25s ease;
}

.nav-btn:hover {
  background-color: #334155;
  transform: translateY(-2px) scale(1.02);
  box-shadow: 0 6px 16px rgba(15, 23, 42, 0.2);
}

@media (max-width: 520px) {
  .nav-container {
    height: 3.75rem;
  }
  .nav-link {
    display: none;
  }
  .nav-btn {
    padding: 0.42rem 0.85rem;
    font-size: 0.78rem;
  }
}

/* ===================================================
   5. HERO SECTION
   =================================================== */
.hero {
  padding: clamp(2rem, 4vw, 3.25rem) 0 clamp(1.25rem, 3vw, 2rem);
  text-align: center;
}

.hero-title {
  font-family: var(--font-sans);
  font-size: clamp(1.85rem, 3.6vw, 2.75rem);
  line-height: 1.2;
  font-weight: 700;
  color: var(--text-main);
  margin-bottom: 0.85rem;
  letter-spacing: -0.025em;
  word-break: break-word;
}

.hero-sub {
  color: var(--text-sub);
  font-size: clamp(0.88rem, 1.8vw, 0.98rem);
  max-width: 540px;
  margin: 0 auto clamp(1.5rem, 3vw, 2rem);
  padding: 0 0.5rem;
  line-height: 1.6;
}

.hero-actions {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.85rem;
  flex-wrap: wrap;
}

.btn-black-pill,
.btn-outline-pill {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.65rem 1.4rem;
  border-radius: 9999px;
  font-size: 0.88rem;
  font-weight: 600;
  text-decoration: none;
  white-space: nowrap;
  transition: transform 0.25s cubic-bezier(0.34, 1.56, 0.64, 1), 
              box-shadow 0.25s ease, 
              background-color 0.2s ease;
}

.btn-black-pill {
  background-color: var(--text-main);
  color: #FFFFFF;
  box-shadow: 0 4px 16px rgba(15, 23, 42, 0.16);
}

.btn-black-pill:hover {
  background-color: #334155;
  transform: translateY(-2px) scale(1.02);
  box-shadow: 0 8px 22px rgba(15, 23, 42, 0.22);
}

.btn-outline-pill {
  background: rgba(255, 255, 255, 0.6);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  color: var(--text-main);
  border: 1px solid var(--glass-border);
  box-shadow: var(--glass-shadow-sm);
}

.btn-outline-pill:hover {
  background: rgba(255, 255, 255, 0.85);
  border-color: #CBD5E1;
  transform: translateY(-2px) scale(1.02);
  box-shadow: var(--glass-shadow-md);
}

@media (max-width: 480px) {
  .hero-actions {
    flex-direction: column;
    width: 100%;
    padding: 0 1rem;
  }
  .btn-black-pill,
  .btn-outline-pill {
    width: 100%;
    max-width: 320px;
    padding: 0.75rem 1.25rem;
  }
}

/* ===================================================
   6. RESPONSIVE MARQUEE SECTION
   =================================================== */
.marquee-section {
  position: relative;
  width: 100%;
  overflow: hidden;
  padding: 1.5rem 0 3rem;
}

.marquee-overlay-left,
.marquee-overlay-right {
  position: absolute;
  top: 0;
  bottom: 0;
  width: clamp(25px, 8vw, 140px);
  z-index: 10;
  pointer-events: none;
}

.marquee-overlay-left {
  left: 0;
  background: linear-gradient(to right, rgba(248, 250, 252, 1) 0%, rgba(248, 250, 252, 0) 100%);
}

.marquee-overlay-right {
  right: 0;
  background: linear-gradient(to left, rgba(248, 250, 252, 1) 0%, rgba(248, 250, 252, 0) 100%);
}

.marquee-row {
  display: flex;
  overflow: hidden;
  user-select: none;
  margin-bottom: 1rem;
}

.marquee-track {
  display: flex;
  gap: 1rem;
  flex-shrink: 0;
  will-change: transform;
}

.marquee-track-right {
  animation: scrollRight 36s linear infinite;
}

.marquee-track-left {
  animation: scrollLeft 36s linear infinite;
}

.marquee-row:hover .marquee-track {
  animation-play-state: paused;
}

@keyframes scrollRight {
  0% { transform: translateX(-50%); }
  100% { transform: translateX(0); }
}

@keyframes scrollLeft {
  0% { transform: translateX(0); }
  100% { transform: translateX(-50%); }
}

.marquee-card {
  width: clamp(240px, 70vw, 310px);
  background: var(--glass-bg);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border: 1px solid var(--glass-border);
  border-radius: 18px;
  padding: 1rem;
  cursor: pointer;
  box-shadow: var(--glass-shadow-sm);
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  flex-shrink: 0;
  transition: transform 0.25s ease, background 0.2s ease, box-shadow 0.25s ease;
}

.marquee-card:hover {
  transform: translateY(-4px) scale(1.02);
  background: var(--glass-bg-strong);
  box-shadow: var(--glass-shadow-md);
}

.marquee-card-body {
  font-family: var(--font-sans);
  font-size: 0.95rem;
  line-height: 1.45;
  color: #0F172A;
  margin: 0.4rem 0 0.75rem;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
  text-overflow: ellipsis;
}

/* ===================================================
   7. 3 INFO FEATURE BOXES
   =================================================== */
.features-section {
  padding-bottom: clamp(2.5rem, 5vw, 3.5rem);
}

.features-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1rem;
}

@media (min-width: 640px) {
  .features-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (min-width: 992px) {
  .features-grid {
    grid-template-columns: repeat(3, 1fr);
  }
}

.feature-box {
  background: var(--glass-bg);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border: 1px solid var(--glass-border);
  border-radius: 18px;
  padding: clamp(1.25rem, 2.5vw, 1.6rem);
  box-shadow: var(--glass-shadow-sm);
  transition: transform 0.3s cubic-bezier(0.34, 1.56, 0.64, 1), 
              border-color 0.2s ease, 
              box-shadow 0.3s ease,
              background 0.2s ease;
}

.feature-box:hover {
  transform: translateY(-3px);
  background: var(--glass-bg-strong);
  border-color: rgba(255, 255, 255, 0.95);
  box-shadow: var(--glass-shadow-md);
}

.feature-title {
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--text-main);
  margin-bottom: 0.4rem;
}

.feature-desc {
  font-size: 0.84rem;
  color: var(--text-sub);
  line-height: 1.5;
}

/* ===================================================
   8. FEED SECTION & SORT DROPDOWN
   =================================================== */
.feed-section {
  padding: 2.5rem 0 5rem;
  border-top: 1px solid rgba(226, 232, 240, 0.6);
}

.section-header-row {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  margin-bottom: 2rem;
  flex-wrap: wrap;
  gap: 1rem;
}

.section-title {
  font-family: var(--font-sans);
  font-size: clamp(1.4rem, 2.8vw, 1.85rem);
  color: var(--text-main);
  font-weight: 700;
  letter-spacing: -0.02em;
  line-height: 1.2;
}

.section-sub {
  font-size: clamp(0.82rem, 1.8vw, 0.9rem);
  color: var(--text-sub);
  margin-top: 0.25rem;
}

@media (max-width: 600px) {
  .section-header-row {
    flex-direction: column;
    align-items: flex-start;
    gap: 0.85rem;
  }
}

.custom-dropdown {
  position: relative;
  display: inline-flex;
  align-items: center;
  user-select: none;
}

.dropdown-trigger {
  display: inline-flex;
  align-items: center;
  justify-content: space-between;
  width: 128px;
  background: rgba(255, 255, 255, 0.72);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border: 1px solid var(--glass-border);
  padding: 0.45rem 0.85rem;
  border-radius: 9999px;
  color: var(--text-main);
  font-family: var(--font-sans);
  font-size: 0.82rem;
  font-weight: 600;
  cursor: pointer;
  box-shadow: var(--glass-shadow-sm);
  transition: background 0.2s ease, border-color 0.2s ease;
}

.dropdown-trigger:hover {
  background: rgba(255, 255, 255, 0.92);
}

.dropdown-trigger-left {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
}

.sort-label-dim {
  color: var(--text-muted);
  font-weight: 500;
}

#sort-current-label {
  display: inline-block;
  color: var(--text-main);
  font-weight: 600;
}

.dropdown-chevron {
  transition: transform 0.25s ease;
  color: var(--text-sub);
  flex-shrink: 0;
}

.custom-dropdown.open .dropdown-chevron {
  transform: rotate(180deg);
}

.dropdown-menu {
  position: absolute;
  top: calc(100% + 6px);
  right: 0;
  width: 100%;
  min-width: 128px;
  background: rgba(255, 255, 255, 0.94);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border: 1px solid rgba(255, 255, 255, 0.95);
  border-radius: 14px;
  padding: 0.3rem;
  box-shadow: var(--glass-shadow-lg);
  opacity: 0;
  visibility: hidden;
  transform: translateY(-6px) scale(0.96);
  transition: all 0.2s cubic-bezier(0.16, 1, 0.3, 1);
  z-index: 30;
}

.custom-dropdown.open .dropdown-menu {
  opacity: 1;
  visibility: visible;
  transform: translateY(0) scale(1);
}

.dropdown-item {
  width: 100%;
  background: transparent;
  border: none;
  padding: 0.5rem 0.65rem;
  border-radius: 10px;
  color: var(--text-sub);
  font-family: var(--font-sans);
  font-size: 0.8rem;
  font-weight: 500;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: space-between;
  transition: all 0.15s ease;
}

.dropdown-item:hover {
  background: rgba(241, 245, 249, 0.85);
  color: var(--text-main);
}

.dropdown-item.active {
  background: rgba(15, 23, 42, 0.05);
  color: var(--text-main);
  font-weight: 600;
}

.dropdown-item .check-icon {
  opacity: 0;
  color: var(--text-main);
  transition: opacity 0.15s ease;
}

.dropdown-item.active .check-icon {
  opacity: 1;
}

/* ===================================================
   9. CARDS GRID & ITEM DESIGN
   =================================================== */
.cards-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.25rem;
}

@media (min-width: 600px) {
  .cards-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 1.35rem;
  }
}

@media (min-width: 960px) {
  .cards-grid {
    grid-template-columns: repeat(3, 1fr);
    gap: 1.5rem;
  }
}

@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(16px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.letter-card {
  background: var(--glass-bg);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border: 1px solid var(--glass-border);
  border-radius: 20px;
  padding: clamp(1.15rem, 3vw, 1.45rem);
  cursor: pointer;
  box-shadow: var(--glass-shadow-sm);
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  min-height: 220px;
  animation: fadeInUp 0.45s cubic-bezier(0.16, 1, 0.3, 1) backwards;
  animation-delay: calc(var(--order, 0) * 0.035s);
  transition: transform 0.3s cubic-bezier(0.34, 1.56, 0.64, 1), 
              box-shadow 0.3s ease, 
              border-color 0.25s ease,
              background 0.25s ease;
  will-change: transform;
}

.letter-card:hover {
  transform: translateY(-5px) scale(1.015);
  background: var(--glass-bg-strong);
  box-shadow: var(--glass-shadow-lg);
  border-color: rgba(255, 255, 255, 0.95);
}

.card-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 0.75rem;
  gap: 0.5rem;
}

.pill-badge {
  display: inline-flex;
  align-items: center;
  background: rgba(255, 255, 255, 0.7);
  backdrop-filter: blur(6px);
  -webkit-backdrop-filter: blur(6px);
  border: 1px solid var(--glass-border);
  padding: 0.25rem 0.7rem;
  border-radius: 9999px;
  font-size: 0.72rem;
  font-weight: 600;
  color: #334155;
  letter-spacing: 0.02em;
  flex-shrink: 0;
}

.sender-tag {
  font-size: 0.75rem;
  color: var(--text-muted);
  font-style: italic;
  max-width: 140px;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.card-body-handwritten {
  font-family: var(--font-sans);
  font-size: 0.95rem;
  line-height: 1.5;
  color: #0F172A;
  flex-grow: 1;
  margin-bottom: 1.15rem;
  display: -webkit-box;
  -webkit-line-clamp: 4;
  -webkit-box-orient: vertical;
  overflow: hidden;
  text-overflow: ellipsis;
  word-break: break-word;
}

.card-song-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.65rem;
  background: rgba(255, 255, 255, 0.55);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  border: 1px solid rgba(255, 255, 255, 0.75);
  border-radius: 14px;
  padding: 0.45rem 0.75rem;
  transition: all 0.25s ease;
}

.letter-card:hover .card-song-bar,
.marquee-card:hover .card-song-bar {
  background: rgba(255, 255, 255, 0.9);
  border-color: #FFFFFF;
}

.song-meta-left {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  flex: 1;
  min-width: 0;
}

.song-cover-mini {
  width: 36px;
  height: 36px;
  border-radius: 8px;
  object-fit: cover;
  background-color: #CBD5E1;
  border: 1px solid rgba(255, 255, 255, 0.8);
  flex-shrink: 0;
  transition: transform 0.3s ease;
}

.letter-card:hover .song-cover-mini,
.marquee-card:hover .song-cover-mini {
  transform: scale(1.06);
}

.song-details {
  overflow: hidden;
  flex: 1;
}

.song-name {
  font-size: 0.78rem;
  font-weight: 600;
  color: var(--text-main);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.song-artist {
  font-size: 0.7rem;
  color: var(--text-sub);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

/* Soundwave */
.soundwave {
  display: flex;
  align-items: flex-end;
  gap: 2.5px;
  height: 16px;
  flex-shrink: 0;
}

.soundwave-bar {
  width: 2.5px;
  background-color: var(--text-muted);
  border-radius: 2px;
  height: 4px;
  transition: background-color 0.2s ease, height 0.2s ease;
}

.letter-card:hover .soundwave-bar,
.marquee-card:hover .soundwave-bar {
  background-color: var(--text-main);
  animation: equalize 1s infinite alternate ease-in-out;
}

.letter-card:hover .soundwave-bar:nth-child(1),
.marquee-card:hover .soundwave-bar:nth-child(1) { animation-delay: 0.1s; }
.letter-card:hover .soundwave-bar:nth-child(2),
.marquee-card:hover .soundwave-bar:nth-child(2) { animation-delay: 0.3s; }
.letter-card:hover .soundwave-bar:nth-child(3),
.marquee-card:hover .soundwave-bar:nth-child(3) { animation-delay: 0.2s; }

@keyframes equalize {
  0% { height: 4px; }
  50% { height: 16px; }
  100% { height: 7px; }
}

/* Skeleton & Empty */
.skeleton-card {
  background: var(--glass-bg);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border: 1px solid var(--glass-border);
  border-radius: 20px;
  padding: 1.25rem;
  min-height: 240px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}

.skeleton-line {
  background: linear-gradient(90deg, rgba(241, 245, 249, 0.6) 25%, rgba(226, 232, 240, 0.9) 50%, rgba(241, 245, 249, 0.6) 75%);
  background-size: 200% 100%;
  animation: shimmer 1.5s infinite;
  border-radius: 6px;
}

@keyframes shimmer {
  0% { background-position: 200% 0; }
  100% { background-position: -200% 0; }
}

.empty-state {
  text-align: center;
  padding: 4rem 1rem;
  color: var(--text-sub);
}

.empty-state-title {
  font-family: var(--font-sans);
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--text-main);
  margin-bottom: 0.4rem;
}

/* ===================================================
   10. RESPONSIVE MODAL
   =================================================== */
.modal-backdrop {
  position: fixed;
  inset: 0;
  background-color: rgba(15, 23, 42, 0.4);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  z-index: 50;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 1rem;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.25s ease;
}

.modal-backdrop.active {
  opacity: 1;
  pointer-events: auto;
}

.modal-dialog {
  background: var(--glass-bg-strong);
  backdrop-filter: blur(28px);
  -webkit-backdrop-filter: blur(28px);
  width: 100%;
  max-width: 520px;
  border-radius: 22px;
  box-shadow: var(--glass-shadow-lg);
  border: 1px solid rgba(255, 255, 255, 0.95);
  overflow: hidden;
  transform: scale(0.95) translateY(12px);
  transition: transform 0.25s cubic-bezier(0.16, 1, 0.3, 1);
  max-height: 88vh;
  display: flex;
  flex-direction: column;
}

.modal-backdrop.active .modal-dialog {
  transform: scale(1) translateY(0);
}

.modal-header {
  padding: 1.15rem 1.35rem 0.85rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  border-bottom: 1px solid rgba(226, 232, 240, 0.7);
  gap: 0.5rem;
}

.modal-recipient-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  overflow: hidden;
}

.modal-close-btn {
  background: rgba(255, 255, 255, 0.6);
  border: 1px solid var(--glass-border);
  color: var(--text-muted);
  cursor: pointer;
  padding: 0.35rem;
  border-radius: 9999px;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  transition: all 0.2s ease;
}

.modal-close-btn:hover {
  color: var(--text-main);
  background: #FFFFFF;
  transform: scale(1.08);
}

.modal-body {
  padding: 1.35rem;
  overflow-y: auto;
  flex: 1;
}

.modal-letter-text {
  font-family: var(--font-sans);
  font-size: 1.05rem;
  line-height: 1.6;
  color: #0F172A;
  white-space: pre-wrap;
  word-break: break-word;
}

.modal-footer {
  padding: 1rem 1.35rem;
  background: rgba(248, 250, 252, 0.75);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-top: 1px solid rgba(226, 232, 240, 0.7);
}

.audio-player-custom {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  background: rgba(255, 255, 255, 0.85);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border: 1px solid rgba(255, 255, 255, 0.95);
  border-radius: 14px;
  padding: 0.55rem 0.75rem;
  box-shadow: var(--glass-shadow-sm);
}

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

.player-cover {
  width: 44px;
  height: 44px;
  border-radius: 10px;
  object-fit: cover;
  flex-shrink: 0;
  border: 1px solid rgba(255, 255, 255, 0.8);
  transition: border-radius 0.4s cubic-bezier(0.16, 1, 0.3, 1), box-shadow 0.4s ease;
}

.player-cover.is-playing {
  border-radius: 50% !important;
  box-shadow: 0 0 0 3px rgba(203, 213, 225, 0.9), 0 6px 14px rgba(15, 23, 42, 0.16);
  animation: vinylSpin 6s linear infinite;
}

.player-controls {
  flex: 1;
  min-width: 0;
}

.player-meta {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  margin-bottom: 0.3rem;
  gap: 0.5rem;
}

.player-title {
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--text-main);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  flex: 1;
}

.player-time {
  font-size: 0.7rem;
  color: var(--text-muted);
  font-variant-numeric: tabular-nums;
  flex-shrink: 0;
}

.progress-bar-container {
  height: 6px;
  background-color: rgba(226, 232, 240, 0.8);
  border-radius: 9999px;
  cursor: pointer;
  overflow: hidden;
}

.progress-bar-fill {
  height: 100%;
  width: 0%;
  background-color: var(--text-main);
  border-radius: 9999px;
  transition: width 0.1s linear;
}

.play-toggle-btn {
  background-color: var(--text-main);
  color: #FFFFFF;
  border: none;
  width: 36px;
  height: 36px;
  border-radius: 9999px;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  flex-shrink: 0;
  box-shadow: 0 4px 12px rgba(15, 23, 42, 0.15);
  transition: transform 0.2s cubic-bezier(0.34, 1.56, 0.64, 1), background-color 0.15s ease;
}

.play-toggle-btn:hover {
  transform: scale(1.08);
  background-color: #334155;
}

/* ===================================================
   11. FOOTER & TOAST
   =================================================== */
.footer {
  border-top: 1px solid rgba(226, 232, 240, 0.7);
  background: rgba(255, 255, 255, 0.5);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  padding: 2rem 1rem;
  text-align: center;
}

.footer-content {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.35rem;
}

.footer-copy {
  font-size: clamp(0.8rem, 2.5vw, 0.88rem);
  font-weight: 500;
  color: var(--text-main);
}

.footer-tag {
  font-size: 0.72rem;
  color: var(--text-muted);
}

.toast {
  position: fixed;
  bottom: 1.5rem;
  right: 1.5rem;
  left: 1.5rem;
  max-width: 400px;
  margin: 0 auto;
  background: rgba(15, 23, 42, 0.9);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border: 1px solid rgba(255, 255, 255, 0.15);
  color: #FFFFFF;
  padding: 0.8rem 1.25rem;
  border-radius: 12px;
  font-size: 0.85rem;
  text-align: center;
  box-shadow: var(--glass-shadow-lg);
  z-index: 100;
  transform: translateY(80px);
  opacity: 0;
  pointer-events: none;
  transition: all 0.25s cubic-bezier(0.16, 1, 0.3, 1);
}

@media (min-width: 640px) {
  .toast {
    left: auto;
  }
}

.toast.active {
  transform: translateY(0);
  opacity: 1;
}

.spinner {
  width: 15px;
  height: 15px;
  border: 2px solid rgba(255, 255, 255, 0.3);
  border-radius: 50%;
  border-top-color: #FFFFFF;
  animation: spin 0.7s linear infinite;
  display: inline-block;
}

@keyframes spin {
  to { transform: rotate(360deg); }
}