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

:root {
  --bg:             #070a12;
  --bg-2:           #0b0e1a;
  --surface:        #0f1421;
  --surface-2:      #161c2e;
  --surface-3:      #1c2438;
  --border:         rgba(255,255,255,0.06);
  --border-active:  rgba(82,215,170,0.35);
  --accent:         #52d7aa;
  --accent-dim:     rgba(82,215,170,0.12);
  --accent-glow:    rgba(82,215,170,0.22);
  --accent-warm:    #f0c87e;
  --accent-warm-dim:rgba(240,200,126,0.12);
  --accent-blue:    #7eb3f0;
  --text:           #dde5f4;
  --text-dim:       #8a9bb8;
  --text-muted:     #445066;
  --red:            #f07e7e;
  --font-display:   'Cormorant Garamond', Georgia, serif;
  --font-body:      'Outfit', sans-serif;
  --radius:         18px;
  --radius-sm:      10px;
  --radius-xs:      6px;
  --shadow-md:      0 8px 32px rgba(0,0,0,0.45);
  --shadow-lg:      0 16px 56px rgba(0,0,0,0.6);
  --transition:     0.25s cubic-bezier(0.4,0,0.2,1);
}

html { scroll-behavior: smooth; }

body {
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.65;
  min-height: 100vh;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}

/* Ambient background glow */
body::before {
  content: '';
  position: fixed;
  inset: 0;
  background:
    radial-gradient(ellipse 70% 50% at 15% 60%, rgba(82,215,170,0.04) 0%, transparent 65%),
    radial-gradient(ellipse 60% 40% at 85% 20%, rgba(126,179,240,0.04) 0%, transparent 60%),
    radial-gradient(ellipse 50% 60% at 50% 100%, rgba(240,200,126,0.025) 0%, transparent 55%);
  pointer-events: none;
  z-index: 0;
}

/* Grain texture overlay */
body::after {
  content: '';
  position: fixed;
  inset: 0;
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 256 256' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)' opacity='0.04'/%3E%3C/svg%3E");
  background-size: 200px;
  pointer-events: none;
  z-index: 0;
  opacity: 0.5;
}

main, nav, footer, header, section, article { position: relative; z-index: 1; }

/* ─── Typography ──────────────────────────────────────────────────── */
h1, h2, h3, h4 {
  font-family: var(--font-display);
  font-weight: 600;
  letter-spacing: -0.01em;
  line-height: 1.2;
  color: var(--text);
}

h1 { font-size: clamp(2.4rem, 5vw, 4.2rem); }
h2 { font-size: clamp(1.8rem, 3.5vw, 2.8rem); }
h3 { font-size: clamp(1.3rem, 2.5vw, 1.7rem); }
h4 { font-size: 1.15rem; }

p { color: var(--text-dim); }
a { color: var(--accent); text-decoration: none; transition: color var(--transition); }
a:hover { color: var(--text); }
strong { color: var(--text); font-weight: 600; }

/* ─── Navigation ──────────────────────────────────────────────────── */
.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 20px 40px;
  border-bottom: 1px solid var(--border);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  background: rgba(7,10,18,0.8);
  position: sticky;
  top: 0;
  z-index: 100;
}

.nav-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  color: var(--text);
  font-family: var(--font-display);
  font-size: 1.4rem;
  font-weight: 600;
  text-decoration: none;
}

.nav-logo svg { color: var(--accent); }

.nav-links {
  display: flex;
  align-items: center;
  gap: 8px;
  list-style: none;
}

.nav-links a {
  color: var(--text-dim);
  font-size: 0.88rem;
  padding: 6px 14px;
  border-radius: 20px;
  border: 1px solid transparent;
  transition: all var(--transition);
  letter-spacing: 0.02em;
}

.nav-links a:hover,
.nav-links a.active {
  color: var(--text);
  background: var(--surface-2);
  border-color: var(--border);
}

.nav-menu-btn {
  display: none;
  background: none;
  border: 1px solid var(--border);
  color: var(--text);
  padding: 8px;
  border-radius: var(--radius-xs);
  cursor: pointer;
}

/* ─── Buttons ─────────────────────────────────────────────────────── */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 24px;
  border-radius: 40px;
  border: none;
  font-family: var(--font-body);
  font-size: 0.9rem;
  font-weight: 500;
  cursor: pointer;
  transition: all var(--transition);
  letter-spacing: 0.02em;
  text-decoration: none;
}

.btn-primary {
  background: var(--accent);
  color: #07120e;
}
.btn-primary:hover {
  background: #6df0c0;
  color: #07120e;
  box-shadow: 0 0 24px var(--accent-glow);
}

.btn-ghost {
  background: transparent;
  color: var(--text-dim);
  border: 1px solid var(--border);
}
.btn-ghost:hover {
  color: var(--text);
  background: var(--surface-2);
  border-color: rgba(255,255,255,0.12);
}

/* ─── Sound Cards ─────────────────────────────────────────────────── */
.sounds-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
}

.sound-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 22px 20px 18px;
  cursor: pointer;
  transition: all var(--transition);
  display: flex;
  flex-direction: column;
  gap: 14px;
  position: relative;
  overflow: hidden;
}

.sound-card::before {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(ellipse at 50% -20%, var(--card-color, var(--accent-dim)) 0%, transparent 70%);
  opacity: 0;
  transition: opacity 0.4s ease;
}

.sound-card:hover {
  border-color: rgba(255,255,255,0.12);
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

.sound-card.active {
  border-color: var(--border-active);
  box-shadow: 0 0 0 1px rgba(82,215,170,0.1), 0 8px 32px rgba(82,215,170,0.1);
}

.sound-card.active::before { opacity: 1; }

.sound-card-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.sound-icon {
  width: 40px;
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 12px;
  background: var(--surface-2);
  font-size: 1.2rem;
  transition: all var(--transition);
  flex-shrink: 0;
}

.sound-card.active .sound-icon {
  background: var(--accent-dim);
  box-shadow: 0 0 16px var(--accent-glow);
  animation: icon-pulse 3s ease-in-out infinite;
}

@keyframes icon-pulse {
  0%, 100% { transform: scale(1); }
  50%       { transform: scale(1.07); }
}

.sound-toggle {
  width: 36px;
  height: 20px;
  background: var(--surface-3);
  border-radius: 10px;
  border: 1px solid var(--border);
  position: relative;
  cursor: pointer;
  transition: all var(--transition);
  flex-shrink: 0;
}

.sound-toggle::after {
  content: '';
  position: absolute;
  width: 14px;
  height: 14px;
  background: var(--text-dim);
  border-radius: 50%;
  top: 2px;
  left: 2px;
  transition: all var(--transition);
}

.sound-card.active .sound-toggle {
  background: var(--accent-dim);
  border-color: var(--border-active);
}

.sound-card.active .sound-toggle::after {
  left: 18px;
  background: var(--accent);
  box-shadow: 0 0 8px var(--accent-glow);
}

.sound-name {
  font-size: 0.95rem;
  font-weight: 500;
  color: var(--text);
  margin-bottom: 2px;
  letter-spacing: 0.01em;
}

.sound-desc {
  font-size: 0.76rem;
  color: var(--text-muted);
  letter-spacing: 0.02em;
}

/* Waveform animation */
.waveform {
  display: flex;
  align-items: center;
  gap: 2.5px;
  height: 18px;
  opacity: 0;
  transition: opacity 0.4s ease;
}

.sound-card.active .waveform { opacity: 1; }

.waveform-bar {
  width: 2.5px;
  border-radius: 2px;
  background: var(--accent);
  animation: waveform-anim 1.2s ease-in-out infinite;
}
.waveform-bar:nth-child(1) { height: 4px;  animation-delay: 0s;    }
.waveform-bar:nth-child(2) { height: 14px; animation-delay: 0.1s;  }
.waveform-bar:nth-child(3) { height: 8px;  animation-delay: 0.2s;  }
.waveform-bar:nth-child(4) { height: 18px; animation-delay: 0.3s;  }
.waveform-bar:nth-child(5) { height: 6px;  animation-delay: 0.4s;  }
.waveform-bar:nth-child(6) { height: 12px; animation-delay: 0.5s;  }
.waveform-bar:nth-child(7) { height: 4px;  animation-delay: 0.6s;  }

@keyframes waveform-anim {
  0%, 100% { transform: scaleY(0.25); opacity: 0.4; }
  50%       { transform: scaleY(1);   opacity: 1;   }
}

/* Volume control */
.volume-control {
  display: flex;
  align-items: center;
  gap: 8px;
  opacity: 0.4;
  transition: opacity var(--transition);
}

.sound-card.active .volume-control { opacity: 1; }

.vol-icon {
  font-size: 0.7rem;
  color: var(--text-muted);
  width: 14px;
  text-align: center;
  flex-shrink: 0;
}

input[type="range"] {
  -webkit-appearance: none;
  appearance: none;
  background: transparent;
  cursor: pointer;
  width: 100%;
  height: 20px;
  display: flex;
  align-items: center;
}

input[type="range"]::-webkit-slider-runnable-track {
  height: 3px;
  background: var(--surface-3);
  border-radius: 2px;
}

input[type="range"]::-webkit-slider-thumb {
  -webkit-appearance: none;
  width: 14px;
  height: 14px;
  background: var(--accent);
  border-radius: 50%;
  margin-top: -5.5px;
  box-shadow: 0 0 10px var(--accent-glow);
  transition: transform 0.15s ease;
}

input[type="range"]::-webkit-slider-thumb:hover {
  transform: scale(1.2);
}

input[type="range"]::-moz-range-track {
  height: 3px;
  background: var(--surface-3);
  border-radius: 2px;
}

input[type="range"]::-moz-range-thumb {
  width: 14px;
  height: 14px;
  background: var(--accent);
  border-radius: 50%;
  border: none;
  box-shadow: 0 0 10px var(--accent-glow);
}

/* ─── Master Controls ─────────────────────────────────────────────── */
.controls-bar {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 20px 28px;
  display: flex;
  align-items: center;
  gap: 24px;
  flex-wrap: wrap;
}

.control-group {
  display: flex;
  align-items: center;
  gap: 12px;
  flex: 1;
  min-width: 180px;
}

.control-label {
  font-size: 0.78rem;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  white-space: nowrap;
}

.master-vol-slider { flex: 1; }

/* Timer */
.timer-select {
  background: var(--surface-2);
  border: 1px solid var(--border);
  color: var(--text);
  font-family: var(--font-body);
  font-size: 0.88rem;
  padding: 8px 14px;
  border-radius: 8px;
  cursor: pointer;
  outline: none;
  transition: all var(--transition);
}

.timer-select:hover, .timer-select:focus {
  border-color: rgba(255,255,255,0.15);
}

.timer-display {
  font-size: 0.9rem;
  color: var(--accent);
  font-variant-numeric: tabular-nums;
  min-width: 80px;
  display: none;
}

.timer-display.visible { display: block; }

/* Focus mode button */
.focus-btn {
  background: var(--surface-2);
  border: 1px solid var(--border);
  color: var(--text-dim);
  font-size: 0.88rem;
  padding: 9px 18px;
  border-radius: 8px;
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: 7px;
  transition: all var(--transition);
  white-space: nowrap;
  font-family: var(--font-body);
}

.focus-btn:hover {
  color: var(--text);
  background: var(--surface-3);
  border-color: rgba(255,255,255,0.14);
}

/* ─── Focus Mode ──────────────────────────────────────────────────── */
body.focus-mode .nav,
body.focus-mode .site-hero,
body.focus-mode .content-section,
body.focus-mode footer {
  display: none !important;
}

body.focus-mode {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 100vh;
}

body.focus-mode .focus-wrapper {
  width: 100%;
  max-width: 1100px;
  padding: 40px 24px;
}

body.focus-mode .focus-exit-btn {
  display: flex !important;
}

.focus-exit-btn {
  display: none;
  position: fixed;
  top: 20px;
  right: 20px;
  background: var(--surface-2);
  border: 1px solid var(--border);
  color: var(--text-dim);
  border-radius: var(--radius-xs);
  padding: 8px 16px;
  font-size: 0.82rem;
  cursor: pointer;
  z-index: 200;
  font-family: var(--font-body);
  transition: all var(--transition);
}

.focus-exit-btn:hover { color: var(--text); }

/* ─── Hero Section ────────────────────────────────────────────────── */
.site-hero {
  text-align: center;
  padding: 64px 40px 52px;
  max-width: 720px;
  margin: 0 auto;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: var(--accent-dim);
  border: 1px solid rgba(82,215,170,0.2);
  color: var(--accent);
  font-size: 0.78rem;
  padding: 5px 14px;
  border-radius: 20px;
  margin-bottom: 24px;
  letter-spacing: 0.04em;
}

.hero-badge span { width: 6px; height: 6px; background: var(--accent); border-radius: 50%; animation: blink 2s ease-in-out infinite; }
@keyframes blink { 0%,100% { opacity:1; } 50% { opacity:0.2; } }

.site-hero h1 {
  margin-bottom: 18px;
  font-style: italic;
  color: var(--text);
}

.site-hero h1 em {
  font-style: normal;
  color: var(--accent);
}

.site-hero p {
  font-size: 1.05rem;
  color: var(--text-dim);
  max-width: 560px;
  margin: 0 auto;
}

/* ─── Content Layout ──────────────────────────────────────────────── */
.container {
  max-width: 1160px;
  margin: 0 auto;
  padding: 0 24px;
}

.content-section {
  padding: 64px 0;
}

.section-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 32px;
  align-items: start;
}

.info-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 28px;
}

.info-card h3 { margin-bottom: 12px; }
.info-card p { font-size: 0.95rem; }

/* ─── Prose / Article pages ──────────────────────────────────────── */
.article-hero {
  padding: 72px 40px 56px;
  max-width: 800px;
  margin: 0 auto;
  text-align: center;
}

.article-body {
  max-width: 760px;
  margin: 0 auto;
  padding: 0 24px 80px;
}

.article-body h2 {
  font-size: 1.9rem;
  margin: 52px 0 18px;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--border);
}

.article-body h3 {
  font-size: 1.3rem;
  margin: 32px 0 12px;
  color: var(--accent);
}

.article-body p {
  color: var(--text-dim);
  margin-bottom: 20px;
  font-size: 1.01rem;
  line-height: 1.75;
}

.article-body ul, .article-body ol {
  color: var(--text-dim);
  padding-left: 24px;
  margin-bottom: 20px;
}

.article-body li {
  margin-bottom: 8px;
  line-height: 1.7;
  font-size: 1.01rem;
}

.article-body blockquote {
  border-left: 3px solid var(--accent);
  padding: 16px 24px;
  margin: 28px 0;
  background: var(--surface);
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  font-style: italic;
  color: var(--text-dim);
}

.callout {
  background: var(--accent-dim);
  border: 1px solid rgba(82,215,170,0.2);
  border-radius: var(--radius-sm);
  padding: 20px 24px;
  margin: 28px 0;
}

.callout p { color: var(--text); margin: 0; }
.callout strong { color: var(--accent); }

.internal-links {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin: 32px 0;
}

.internal-link {
  background: var(--surface-2);
  border: 1px solid var(--border);
  color: var(--text-dim);
  padding: 8px 16px;
  border-radius: 20px;
  font-size: 0.86rem;
  text-decoration: none;
  transition: all var(--transition);
}

.internal-link:hover {
  color: var(--accent);
  border-color: rgba(82,215,170,0.3);
  background: var(--accent-dim);
}

/* ─── FAQ ─────────────────────────────────────────────────────────── */
.faq-item {
  border-bottom: 1px solid var(--border);
  padding: 24px 0;
}

.faq-question {
  font-size: 1.1rem;
  font-family: var(--font-display);
  font-weight: 600;
  color: var(--text);
  cursor: pointer;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 16px;
  user-select: none;
}

.faq-chevron {
  flex-shrink: 0;
  width: 20px;
  height: 20px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-muted);
  transition: transform var(--transition);
}

.faq-item.open .faq-chevron { transform: rotate(180deg); }

.faq-answer {
  color: var(--text-dim);
  font-size: 0.97rem;
  line-height: 1.72;
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.4s ease, padding 0.3s ease;
}

.faq-item.open .faq-answer {
  max-height: 600px;
  padding-top: 14px;
}

/* ─── Footer ──────────────────────────────────────────────────────── */
footer {
  border-top: 1px solid var(--border);
  padding: 48px 40px 32px;
  margin-top: 40px;
}

.footer-inner {
  max-width: 1160px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr 1fr;
  gap: 40px;
}

.footer-brand p {
  font-size: 0.88rem;
  color: var(--text-muted);
  margin-top: 12px;
  max-width: 280px;
  line-height: 1.6;
}

.footer-col h5 {
  font-size: 0.76rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--text-muted);
  margin-bottom: 14px;
  font-family: var(--font-body);
  font-weight: 500;
}

.footer-col ul {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.footer-col a {
  color: var(--text-dim);
  font-size: 0.88rem;
  text-decoration: none;
  transition: color var(--transition);
}

.footer-col a:hover { color: var(--accent); }

.footer-bottom {
  max-width: 1160px;
  margin: 32px auto 0;
  padding-top: 20px;
  border-top: 1px solid var(--border);
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 8px;
}

.footer-bottom p { font-size: 0.8rem; color: var(--text-muted); }

/* ─── Page header for inner pages ────────────────────────────────── */
.page-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: var(--surface-2);
  border: 1px solid var(--border);
  color: var(--text-muted);
  font-size: 0.76rem;
  padding: 4px 12px;
  border-radius: 20px;
  margin-bottom: 20px;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

/* ─── Responsive ──────────────────────────────────────────────────── */
@media (max-width: 1024px) {
  .sounds-grid { grid-template-columns: repeat(2, 1fr); }
  .footer-inner { grid-template-columns: 1fr 1fr; gap: 32px; }
}

@media (max-width: 768px) {
  .nav { padding: 16px 20px; }
  .nav-links { display: none; }
  .nav-links.open {
    display: flex;
    flex-direction: column;
    position: fixed;
    top: 0; left: 0; right: 0; bottom: 0;
    background: var(--bg-2);
    z-index: 99;
    justify-content: center;
    align-items: center;
    gap: 12px;
  }
  .nav-links.open a { font-size: 1.1rem; padding: 12px 28px; }
  .nav-menu-btn { display: flex; align-items: center; justify-content: center; }
  .site-hero { padding: 48px 20px 36px; }
  .article-hero { padding: 48px 20px 40px; }
  .sounds-grid { grid-template-columns: repeat(2, 1fr); gap: 12px; }
  .controls-bar { padding: 16px 18px; gap: 16px; }
  .control-group { min-width: 140px; }
  .footer-inner { grid-template-columns: 1fr; gap: 24px; }
  footer { padding: 40px 20px 24px; }
  .section-grid { grid-template-columns: 1fr; }
  .container { padding: 0 16px; }
}

@media (max-width: 480px) {
  .sounds-grid { grid-template-columns: repeat(2, 1fr); gap: 10px; }
  .sound-card { padding: 16px 14px 14px; }
  .sound-name { font-size: 0.87rem; }
}