/* ===== Seren — Light Minimal Theme ===== */

:root {
  --white: #ffffff;
  --off-white: #f7f8fc;
  --light-gray: #e4e7ef;
  --mid-gray: #6b7280;
  --dark: #111827;
  --accent: #4f6df5;
  --accent-light: #dbe4ff;
  --accent-dark: #3b54c4;
  --forest: #0f172a;
  --forest-mid: #1e293b;
  --font-heading: 'Inter', sans-serif;
  --font-body: 'Inter', sans-serif;
  --max-width: 1140px;
  --transition: 0.3s ease;
}

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

html { scroll-behavior: smooth; }

body {
  font-family: var(--font-body);
  color: var(--dark);
  background: var(--white);
  line-height: 1.7;
  font-size: 16px;
}

a { color: var(--accent-dark); text-decoration: none; transition: color var(--transition); }
a:hover { color: var(--accent); }

img { max-width: 100%; display: block; }

.container { max-width: var(--max-width); margin: 0 auto; padding: 0 24px; }

/* ---- Nav ---- */
.nav {
  position: fixed; top: 0; left: 0; right: 0; z-index: 100;
  background: rgba(255,255,255,0.95);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--light-gray);
  padding: 16px 0;
}
.nav .container {
  display: flex; align-items: center; justify-content: space-between;
}
.nav-logo {
  font-size: 1.2rem; font-weight: 700; color: var(--dark);
  letter-spacing: 2px; display: flex; align-items: center; gap: 8px;
}
.latin-def { font-style: italic; opacity: 0.5; font-size: 0.75rem; margin-left: 12px; }
@media (max-width: 900px) { .latin-def { display: none; } }
.nav-icon { height: 64px; width: auto; }
.nav-links { display: flex; gap: 18px; list-style: none; flex-wrap: nowrap; margin: 0 auto; }
.nav-links a { color: var(--mid-gray); font-size: 0.85rem; font-weight: 500; white-space: nowrap; }
.nav-links a:hover, .nav-links a.active { color: var(--dark); }
.nav-toggle { display: none; background: none; border: none; font-size: 1.5rem; cursor: pointer; }

/* ---- Hero ---- */
.hero {
  padding: 160px 0 100px;
  text-align: center;
  background: linear-gradient(180deg, var(--off-white) 0%, var(--white) 100%);
}
.hero h1 {
  font-size: 3.5rem; font-weight: 700; letter-spacing: -1px;
  margin-bottom: 20px; line-height: 1.15;
}
.hero h1 span { color: var(--accent); }

/* ---- Hero Background Images ---- */
.hero-bg {
  position: relative;
  background-size: cover;
  background-position: center;
}
.hero-bg::before {
  content: ''; position: absolute; inset: 0;
  background: linear-gradient(to bottom, rgba(0,0,0,0.5) 0%, rgba(0,0,0,0.35) 60%, rgba(255,255,255,0) 100%);
  z-index: 1;
}
.hero-bg::after {
  content: ''; position: absolute; bottom: 0; left: 0; right: 0;
  height: 120px;
  background: linear-gradient(to bottom, transparent, #f8f6f3);
  z-index: 1;
}
.hero-bg .container { position: relative; z-index: 2; }
.hero-bg h1, .hero-bg p { color: #fff !important; }
.hero-bg p { opacity: 1 !important; }
.hero-bg h1 span { color: var(--accent-light); }

.hero p {
  font-size: 1.2rem; color: var(--mid-gray); max-width: 560px;
  margin: 0 auto 40px;
}

/* ---- Buttons ---- */
.btn {
  display: inline-block; padding: 14px 32px; border-radius: 50px;
  font-weight: 600; font-size: 1rem; cursor: pointer;
  transition: all var(--transition); border: none;
}

/* ---- Promo Banner ---- */
.promo-banner {
  background: var(--forest); color: var(--white); text-align: center;
  padding: 10px 16px; font-size: 0.85rem; font-weight: 500;
}
.promo-banner a {
  color: var(--accent-light); text-decoration: underline; margin-left: 8px;
}
.promo-banner a:hover { color: var(--white); }

/* ---- Newsletter ---- */
.newsletter-form {
  display: flex; gap: 8px; margin-top: 12px;
}
.newsletter-form input {
  flex: 1; padding: 10px 14px; border-radius: 50px;
  border: 1px solid rgba(255,255,255,0.2); background: rgba(255,255,255,0.1);
  color: var(--white); font-size: 0.85rem; font-family: var(--font-body);
}
.newsletter-form input::placeholder { color: rgba(255,255,255,0.4); }
.newsletter-form input:focus { outline: none; border-color: var(--accent); }
.newsletter-form button {
  padding: 10px 20px; border-radius: 50px; border: none;
  background: var(--accent); color: var(--white); font-weight: 600;
  font-size: 0.85rem; cursor: pointer; transition: background var(--transition);
}
.newsletter-form button:hover { background: var(--accent-dark); }

/* ---- Daily Quote ---- */
.daily-quote {
  text-align: center; padding: 60px 24px;
  background: var(--off-white); border-top: 1px solid var(--light-gray);
  border-bottom: 1px solid var(--light-gray);
}
.daily-quote blockquote {
  font-size: 1.4rem; font-style: italic; color: var(--dark);
  max-width: 640px; margin: 0 auto 12px; line-height: 1.6;
}
.daily-quote cite {
  font-size: 0.9rem; color: var(--mid-gray); font-style: normal;
}
.btn-primary {
  background: var(--accent); color: var(--white);
}
.btn-primary:hover { background: var(--accent-dark); color: var(--white); }
.btn-outline {
  background: transparent; border: 2px solid var(--accent);
  color: var(--accent-dark);
}
.btn-outline:hover { background: var(--accent); color: var(--white); }
.btn-group { display: flex; gap: 16px; justify-content: center; flex-wrap: wrap; }

/* ---- Sections ---- */
section { padding: 100px 0; }
section:nth-child(even) { background: var(--off-white); }

.section-header {
  text-align: center; margin-bottom: 60px;
}
.section-header h2 {
  font-size: 2.2rem; font-weight: 700; margin-bottom: 12px;
}
.section-header p {
  color: var(--mid-gray); font-size: 1.05rem; max-width: 520px; margin: 0 auto;
}

/* ---- Feature Grid ---- */
.feature-grid {
  display: grid; grid-template-columns: repeat(3, 1fr); gap: 40px;
}
.feature-card {
  background: transparent; border-radius: 12px; padding: 40px 32px;
  border: none;
  transition: transform var(--transition);
}
.feature-card:hover {
  transform: translateY(-2px);
}
.feature-icon {
  width: 56px; height: 56px; background: var(--accent-light);
  border-radius: 14px; display: flex; align-items: center; justify-content: center;
  font-size: 1.4rem; margin-bottom: 20px;
}
.feature-icon svg {
  width: 28px; height: 28px; stroke-width: 1.75;
}
.feature-accent {
  width: 32px; height: 3px; background: var(--accent);
  border-radius: 2px; margin-bottom: 20px;
}
.feature-card h3 { font-size: 1.2rem; margin-bottom: 10px; }
.feature-card p { color: var(--mid-gray); font-size: 0.95rem; }

/* ---- App Download ---- */
.app-section { text-align: center; }
.store-badges { display: flex; gap: 16px; justify-content: center; margin-top: 32px; }
.store-badge {
  display: inline-flex; align-items: center; gap: 10px;
  background: var(--dark); color: var(--white); padding: 14px 28px;
  border-radius: 10px; font-size: 0.95rem; font-weight: 500;
  transition: background var(--transition);
}
.store-badge:hover { background: #343a40; color: var(--white); }
.store-badge .badge-icon { font-size: 1.5rem; }

/* ---- Video Grid ---- */
.video-grid {
  display: grid; grid-template-columns: repeat(2, 1fr); gap: 32px;
}
.video-card {
  border-radius: 12px; overflow: hidden;
  border: none;
  background: transparent;
}
.video-card iframe {
  width: 100%; aspect-ratio: 16/9; border: none; display: block;
}
.video-card .video-info { padding: 20px; }
.video-card h3 { font-size: 1.05rem; margin-bottom: 6px; }
.video-card p { color: var(--mid-gray); font-size: 0.9rem; }

/* ---- Testimonials ---- */
.testimonial-grid {
  display: grid; grid-template-columns: repeat(3, 1fr); gap: 32px;
}
.testimonial {
  background: transparent; border: none;
  border-radius: 12px; padding: 32px;
}
.testimonial p { font-style: italic; margin-bottom: 16px; color: rgba(255,255,255,0.9); }
.testimonial .author { font-weight: 600; font-size: 0.9rem; color: var(--mid-gray); }

/* ---- Contact Form ---- */
.contact-form {
  max-width: 600px; margin: 0 auto;
}
.form-group { margin-bottom: 24px; }
.form-group label {
  display: block; font-weight: 600; font-size: 0.9rem;
  margin-bottom: 8px; color: var(--dark);
}
.form-group input,
.form-group textarea,
.form-group select {
  width: 100%; padding: 14px 16px; border-radius: 8px;
  border: 1px solid var(--light-gray); font-size: 1rem;
  font-family: var(--font-body); transition: border-color var(--transition);
  background: var(--white);
}
.form-group input:focus,
.form-group textarea:focus {
  outline: none; border-color: var(--accent);
}
.form-group textarea { resize: vertical; min-height: 140px; }

/* ---- CTA Banner ---- */
.cta-banner {
  background: linear-gradient(135deg, var(--forest-mid) 0%, var(--forest) 100%) !important;
  color: var(--white); text-align: center; padding: 80px 0;
}
.cta-banner h2 { font-size: 2rem; margin-bottom: 12px; }
.cta-banner p { opacity: 0.9; margin-bottom: 32px; font-size: 1.1rem; }
.cta-banner .btn { background: var(--white); color: var(--accent-dark); }
.cta-banner .btn:hover { background: var(--off-white); }

/* ---- Footer ---- */
.footer {
  background: var(--forest); color: rgba(255,255,255,0.6);
  padding: 60px 0 32px;
}
.footer-grid {
  display: grid; grid-template-columns: 2fr 1fr 1fr 1fr; gap: 40px;
  margin-bottom: 40px;
}
.footer h4 { color: var(--white); margin-bottom: 16px; font-size: 1rem; }
.footer p { font-size: 0.9rem; }
.footer ul { list-style: none; }
.footer ul li { margin-bottom: 8px; }
.footer ul a { color: rgba(255,255,255,0.6); font-size: 0.9rem; }
.footer ul a:hover { color: var(--white); }
.footer-bottom {
  border-top: 1px solid rgba(255,255,255,0.1);
  padding-top: 24px; text-align: center; font-size: 0.85rem;
}

/* ---- Filter Bar ---- */
.filter-bar {
  display: flex; gap: 8px; flex-wrap: wrap; justify-content: center;
}
.filter-btn {
  padding: 8px 20px; border-radius: 50px; border: 1px solid var(--light-gray);
  background: var(--white); color: var(--mid-gray); font-size: 0.9rem;
  font-weight: 500; cursor: pointer; transition: all var(--transition);
  font-family: var(--font-body);
}
.filter-btn:hover { border-color: var(--accent); color: var(--accent-dark); }
.filter-btn.active {
  background: var(--accent); color: var(--white); border-color: var(--accent);
}

/* ---- Sessions Grid ---- */
.sessions-grid {
  display: grid; grid-template-columns: repeat(2, 1fr); gap: 32px;
}
.session-card {
  background: transparent; border-radius: 12px; overflow: hidden;
  border: none;
  transition: transform var(--transition);
}
.session-card:hover {
  transform: translateY(-2px);
}
.session-thumb {
  height: 160px; display: flex; align-items: center; justify-content: center;
  position: relative; overflow: hidden;
}
.session-thumb::before {
  content: ''; position: absolute; top: -50%; left: -50%; width: 200%; height: 200%;
  background: radial-gradient(circle at 30% 40%, rgba(255,255,255,0.12) 0%, transparent 60%);
  pointer-events: none;
}
.session-thumb::after {
  content: ''; position: absolute; bottom: 0; left: 0; right: 0; height: 40%;
  background: linear-gradient(to top, rgba(0,0,0,0.2), transparent);
  pointer-events: none;
}
.session-emoji { display: none; }
.session-badge {
  position: absolute; top: 12px; right: 12px; padding: 4px 12px;
  border-radius: 50px; font-size: 0.75rem; font-weight: 600;
}
.badge-free { background: var(--accent); color: var(--white); }
.badge-locked { background: rgba(0,0,0,0.5); color: var(--white); }
.session-info { padding: 20px; }
.session-info h3 { font-size: 1.1rem; margin-bottom: 6px; }
.session-meta {
  display: flex; gap: 12px; font-size: 0.8rem; color: var(--mid-gray);
  margin-bottom: 8px;
}
.session-info p { color: var(--mid-gray); font-size: 0.9rem; }
.session-locked { opacity: 0.75; }

/* ---- Sound Grid ---- */
.sound-grid {
  display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px;
}
.sound-card {
  background: transparent; border-radius: 12px; padding: 24px;
  border: none; text-align: center;
  transition: transform var(--transition);
  position: relative;
}
.sound-card:hover {
  transform: translateY(-2px);
}
.sound-icon { display: none; }
.sound-scene {
  width: 100%; height: 140px; border-radius: 10px;
  display: flex; align-items: flex-end; justify-content: flex-start;
  padding: 16px; margin-bottom: 12px;
  background-size: cover; position: relative; overflow: hidden;
}
.sound-title {
  color: #fff; font-family: 'Cormorant Garamond', Georgia, serif;
  font-size: 1.25rem; font-weight: 700; text-shadow: 0 2px 12px rgba(0,0,0,0.5);
  line-height: 1.2;
}
.sound-meta {
  display: flex; align-items: center; justify-content: space-between;
  padding: 0 4px;
}
.sound-card h3 { font-size: 1rem; margin-bottom: 6px; }
.sound-category-tag {
  display: inline-block; font-size: 0.75rem; color: var(--mid-gray);
  background: var(--off-white); padding: 2px 10px; border-radius: 50px;
}
.sound-locked { opacity: 0.7; }
.sound-lock-overlay {
  margin-top: 12px; display: flex; flex-direction: column; align-items: center;
}
.sound-lock-overlay > span { font-size: 1.5rem; }

/* ---- Lock Badge ---- */
.lock-badge {
  position: absolute; top: 12px; right: 12px;
  background: rgba(255,255,255,0.95);
  padding: 8px 12px;
  border-radius: 20px;
  font-size: 0.7rem;
  font-weight: 700;
  display: flex; align-items: center; gap: 6px;
  justify-content: center; z-index: 2;
  box-shadow: 0 2px 8px rgba(0,0,0,0.25);
  color: #1a1a2e;
}
.lock-badge svg { stroke: #b8860b; width: 14px; height: 14px; }

/* ---- Animations ---- */
.fade-in {
  opacity: 0; transform: translateY(24px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}
.fade-in.visible { opacity: 1; transform: translateY(0); }

/* ---- Responsive ---- */
@media (max-width: 768px) {
  .nav-links { display: none; }
  .nav-links.open {
    display: flex; flex-direction: column; position: absolute;
    top: 60px; left: 0; right: 0; background: var(--white);
    padding: 24px; gap: 16px; border-bottom: 1px solid var(--light-gray);
  }
  .nav-toggle { display: block; }
  .hero h1 { font-size: 2.2rem; }
  .hero { padding: 120px 0 60px; }
  .feature-grid, .testimonial-grid { grid-template-columns: 1fr; }
  .video-grid { grid-template-columns: 1fr; }
  .sessions-grid { grid-template-columns: 1fr; }
  .sound-grid { grid-template-columns: repeat(2, 1fr); }
  .footer-grid { grid-template-columns: 1fr 1fr; }
  .stats-bar { grid-template-columns: repeat(2, 1fr) !important; gap: 20px !important; }
  .research-grid { grid-template-columns: 1fr !important; }
  .lifestyle-grid { grid-template-columns: repeat(2, 1fr) !important; }
}