/* Plustune Landing — Premium */
:root {
  --bg: #06060a;
  --bg-elevated: #0c0c12;
  --bg-card: rgba(255, 255, 255, 0.03);
  --border: rgba(255, 255, 255, 0.06);
  --text: #f4f4f6;
  --text-muted: #8b8b9a;
  --accent: #22c55e;
  --accent-hover: #16a34a;
  --accent-glow: rgba(34, 197, 94, 0.25);
  --font-display: 'Syne', sans-serif;
  --font-body: 'DM Sans', sans-serif;
  --radius: 16px;
  --radius-lg: 24px;
  --header-h: 72px;
}

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-body);
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
  min-height: 100vh;
  overflow-x: hidden;
}

a {
  color: inherit;
  text-decoration: none;
}

img {
  max-width: 100%;
  height: auto;
}

.container {
  width: 100%;
  max-width: 1120px;
  margin: 0 auto;
  padding: 0 24px;
}

/* Header */
.header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  height: var(--header-h);
  background: rgba(6, 6, 10, 0.8);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
}

.header-inner {
  max-width: 1120px;
  margin: 0 auto;
  padding: 0 24px;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.logo {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 1.5rem;
  letter-spacing: -0.02em;
  color: var(--text);
}

.nav {
  display: flex;
  align-items: center;
  gap: 32px;
}

.nav a {
  font-size: 0.9375rem;
  font-weight: 500;
  color: var(--text-muted);
  transition: color 0.2s;
}

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

.nav-cta {
  color: var(--accent) !important;
}

.nav-cta:hover {
  color: var(--accent-hover) !important;
}

.btn-menu {
  display: none;
  flex-direction: column;
  gap: 6px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 8px;
}

.btn-menu span {
  width: 24px;
  height: 2px;
  background: var(--text);
  border-radius: 1px;
  transition: transform 0.2s;
}

@media (max-width: 768px) {
  .btn-menu { display: flex; }
  .nav {
    position: fixed;
    top: var(--header-h);
    left: 0;
    right: 0;
    bottom: 0;
    background: var(--bg-elevated);
    flex-direction: column;
    justify-content: center;
    gap: 24px;
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.2s, visibility 0.2s;
  }
  .nav.is-open {
    opacity: 1;
    visibility: visible;
  }
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  font-family: var(--font-body);
  font-weight: 600;
  font-size: 0.9375rem;
  padding: 14px 28px;
  border-radius: 999px;
  border: none;
  cursor: pointer;
  transition: background 0.2s, color 0.2s, box-shadow 0.2s;
}

.btn-icon {
  flex-shrink: 0;
}

.btn-primary {
  background: var(--accent);
  color: #000;
}

.btn-primary:hover {
  background: var(--accent-hover);
  color: #000;
  box-shadow: 0 0 32px var(--accent-glow);
}

.btn-ghost {
  background: transparent;
  color: var(--text);
  border: 1px solid var(--border);
}

.btn-ghost:hover {
  background: rgba(255, 255, 255, 0.05);
  border-color: rgba(255, 255, 255, 0.12);
}

.btn-lg {
  padding: 16px 32px;
  font-size: 1rem;
}

.btn-xl {
  padding: 20px 40px;
  font-size: 1.125rem;
}

/* Hero */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  justify-content: center;
  padding-top: var(--header-h);
  padding-bottom: 80px;
}

.hero-bg {
  position: absolute;
  inset: 0;
  pointer-events: none;
}

.hero-gradient {
  position: absolute;
  inset: 0;
  background: radial-gradient(ellipse 80% 50% at 50% -20%, rgba(34, 197, 94, 0.12), transparent),
              radial-gradient(ellipse 60% 40% at 80% 50%, rgba(34, 197, 94, 0.06), transparent);
}

.hero-grid {
  position: absolute;
  inset: 0;
  background-image: linear-gradient(rgba(255,255,255,0.02) 1px, transparent 1px),
                    linear-gradient(90deg, rgba(255,255,255,0.02) 1px, transparent 1px);
  background-size: 64px 64px;
  mask-image: radial-gradient(ellipse 70% 60% at 50% 30%, black, transparent);
}

.hero-glow {
  position: absolute;
  width: 400px;
  height: 400px;
  top: 20%;
  right: 10%;
  background: var(--accent-glow);
  filter: blur(120px);
  border-radius: 50%;
  opacity: 0.6;
}

.hero-inner {
  position: relative;
  z-index: 1;
}

.hero-label {
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--accent);
  text-transform: uppercase;
  letter-spacing: 0.12em;
  margin-bottom: 20px;
}

.hero-title {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(2.5rem, 6vw, 4rem);
  line-height: 1.1;
  letter-spacing: -0.03em;
  margin-bottom: 24px;
  max-width: 14ch;
}

.hero-title-accent {
  color: var(--accent);
}

.hero-desc {
  font-size: 1.125rem;
  color: var(--text-muted);
  max-width: 42ch;
  margin-bottom: 40px;
  line-height: 1.7;
}

.hero-ctas {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
}

.hero-visual {
  position: absolute;
  right: 5%;
  top: 50%;
  transform: translateY(-50%);
  width: min(320px, 40vw);
  pointer-events: none;
}

.phone-mockup {
  aspect-ratio: 9/19;
  max-height: 70vh;
  background: linear-gradient(145deg, #1a1a1f, #0d0d12);
  border-radius: 40px;
  padding: 12px;
  box-shadow: 0 40px 80px rgba(0,0,0,0.5),
              0 0 0 1px rgba(255,255,255,0.05);
}

.phone-screen {
  width: 100%;
  height: 100%;
  background: var(--bg-elevated);
  border-radius: 32px;
  overflow: hidden;
}

.mockup-content {
  padding: 48px 24px 24px;
  height: 100%;
}

.mockup-bar {
  width: 80px;
  height: 6px;
  background: rgba(255,255,255,0.2);
  border-radius: 3px;
  margin: 0 auto 32px;
}

.mockup-artwork {
  width: 100%;
  aspect-ratio: 1;
  background: linear-gradient(135deg, var(--accent) 0%, #15803d 100%);
  border-radius: var(--radius);
  margin-bottom: 24px;
}

.mockup-track {
  height: 20px;
  background: rgba(255,255,255,0.1);
  border-radius: 4px;
  margin-bottom: 8px;
  width: 70%;
}

.mockup-progress {
  height: 4px;
  background: var(--accent);
  border-radius: 2px;
  width: 30%;
}

@media (max-width: 1024px) {
  .hero-visual { display: none; }
}

/* Section common */
.section {
  padding: 100px 0;
}

.section-label {
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--accent);
  text-transform: uppercase;
  letter-spacing: 0.12em;
  margin-bottom: 12px;
}

.section-title {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(2rem, 4vw, 2.75rem);
  letter-spacing: -0.02em;
  margin-bottom: 48px;
  max-width: 20ch;
}

/* Features */
.features {
  background: var(--bg-elevated);
}

.features-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 24px;
}

.feature-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 32px;
  transition: border-color 0.2s, background 0.2s;
}

.feature-card:hover {
  border-color: rgba(255,255,255,0.1);
  background: rgba(255,255,255,0.05);
}

.feature-icon {
  width: 48px;
  height: 48px;
  margin-bottom: 20px;
  color: var(--accent);
}

.feature-icon svg {
  width: 100%;
  height: 100%;
}

.feature-card h3 {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 1.25rem;
  margin-bottom: 8px;
}

.feature-card p {
  font-size: 0.9375rem;
  color: var(--text-muted);
  line-height: 1.6;
}

/* Experience */
.experience-inner {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 64px;
  align-items: center;
}

.experience-desc {
  font-size: 1.0625rem;
  color: var(--text-muted);
  margin-bottom: 28px;
  line-height: 1.7;
}

.experience-list {
  list-style: none;
  margin-bottom: 32px;
}

.experience-list li {
  position: relative;
  padding-left: 24px;
  margin-bottom: 12px;
  font-size: 0.9375rem;
  color: var(--text-muted);
}

.experience-list li::before {
  content: '';
  position: absolute;
  left: 0;
  top: 0.5em;
  width: 6px;
  height: 6px;
  background: var(--accent);
  border-radius: 50%;
}

.experience-visual {
  position: relative;
  min-height: 320px;
}

.floating-cards {
  position: absolute;
  inset: 0;
}

.float-card {
  position: absolute;
  padding: 20px 24px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 1rem;
  white-space: nowrap;
  box-shadow: 0 20px 40px rgba(0,0,0,0.2);
}

.float-card-1 { top: 0; left: 10%; }
.float-card-2 { top: 40%; right: 0; }
.float-card-3 { bottom: 10%; left: 20%; }

@media (max-width: 768px) {
  .experience-inner { grid-template-columns: 1fr; }
  .experience-visual { min-height: 200px; }
}

/* CTA Section */
.cta-section {
  position: relative;
  padding: 120px 0;
}

.cta-bg {
  position: absolute;
  inset: 0;
  background: radial-gradient(ellipse 80% 80% at 50% 50%, rgba(34, 197, 94, 0.08), transparent);
}

.cta-inner {
  position: relative;
  z-index: 1;
  text-align: center;
}

.cta-title {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(2rem, 4vw, 3rem);
  letter-spacing: -0.02em;
  margin-bottom: 16px;
}

.cta-desc {
  font-size: 1.125rem;
  color: var(--text-muted);
  margin-bottom: 40px;
}

/* Footer */
.footer {
  padding: 48px 0;
  border-top: 1px solid var(--border);
}

.footer-inner {
  text-align: center;
}

.footer .logo {
  display: inline-block;
  margin-bottom: 8px;
}

.footer-tagline {
  font-size: 0.9375rem;
  color: var(--text-muted);
  margin-bottom: 24px;
}

.footer-legal {
  font-size: 0.8125rem;
  color: var(--text-muted);
  opacity: 0.7;
}