/* ═══════════════════════════════════════
   Auralsys Landing Page Styles
   Customize colors via CSS variables below
   ═══════════════════════════════════════ */

:root {
  --color-bg: #0a0e1a;
  --color-surface: #111827;
  --color-surface-alt: #1e293b;
  --color-border: #1e293b;
  --color-text: #e2e8f0;
  --color-text-muted: #94a3b8;
  --color-primary: #38bdf8;
  --color-primary-hover: #0ea5e9;
  --color-accent: #a78bfa;
  --color-success: #34d399;
  --radius: 12px;
  --radius-sm: 8px;
  --container-max: 1140px;
  --font: system-ui, -apple-system, 'Segoe UI', sans-serif;
}

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

html { scroll-behavior: smooth; }

body {
  font-family: var(--font);
  background: var(--color-bg);
  color: var(--color-text);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

.container {
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 1.5rem;
}

/* ─── Buttons ─── */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: .625rem 1.25rem;
  border-radius: var(--radius-sm);
  font-weight: 600;
  font-size: .9rem;
  text-decoration: none;
  border: 2px solid transparent;
  cursor: pointer;
  transition: all .2s;
}
.btn-primary {
  background: var(--color-primary);
  color: #0a0e1a;
}
.btn-primary:hover {
  background: var(--color-primary-hover);
  transform: translateY(-1px);
}
.btn-outline {
  border-color: var(--color-primary);
  color: var(--color-primary);
  background: transparent;
}
.btn-outline:hover {
  background: var(--color-primary);
  color: #0a0e1a;
}
.btn-lg { padding: .875rem 2rem; font-size: 1rem; }
.btn-block { width: 100%; }

/* ─── Navbar ─── */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  background: rgba(10, 14, 26, .85);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--color-border);
  padding: .75rem 0;
}
.nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.logo {
  font-size: 1.25rem;
  font-weight: 700;
  text-decoration: none;
  color: var(--color-text);
}
.logo span { color: var(--color-primary); }
.nav-links {
  display: flex;
  align-items: center;
  gap: 1.5rem;
}
.nav-links a:not(.btn) {
  color: var(--color-text-muted);
  text-decoration: none;
  font-size: .9rem;
  transition: color .2s;
}
.nav-links a:not(.btn):hover { color: var(--color-text); }
.menu-toggle {
  display: none;
  background: none;
  border: none;
  color: var(--color-text);
  font-size: 1.5rem;
  cursor: pointer;
}

/* ─── Hero ─── */
.hero {
  padding: 10rem 0 6rem;
  text-align: center;
  background: radial-gradient(ellipse at 50% 0%, rgba(56, 189, 248, .08) 0%, transparent 60%);
}
.hero h1 {
  font-size: clamp(2.5rem, 6vw, 4rem);
  font-weight: 800;
  letter-spacing: -.02em;
  line-height: 1.1;
  margin-bottom: 1.25rem;
}
.hero-sub {
  max-width: 640px;
  margin: 0 auto 2rem;
  font-size: 1.15rem;
  color: var(--color-text-muted);
}
.hero-cta {
  display: flex;
  gap: 1rem;
  justify-content: center;
  flex-wrap: wrap;
  margin-bottom: 4rem;
}
.hero-stats {
  display: flex;
  justify-content: center;
  gap: 3rem;
  flex-wrap: wrap;
}
.hero-stats div {
  display: flex;
  flex-direction: column;
  align-items: center;
}
.hero-stats strong {
  font-size: 1.75rem;
  color: var(--color-primary);
}
.hero-stats span {
  font-size: .8rem;
  color: var(--color-text-muted);
  margin-top: .25rem;
}

/* ─── Section shared ─── */
.features, .plans, .contact {
  padding: 6rem 0;
}
.features { background: var(--color-surface); }
.plans { background: var(--color-bg); }
.contact { background: var(--color-surface); }

h2 {
  font-size: 2rem;
  text-align: center;
  margin-bottom: .5rem;
}
.section-sub {
  text-align: center;
  color: var(--color-text-muted);
  margin-bottom: 3rem;
}

/* ─── Features Grid ─── */
.feature-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 1.5rem;
}
.feature-card {
  background: var(--color-surface-alt);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 2rem;
  transition: transform .2s, border-color .2s;
}
.feature-card:hover {
  transform: translateY(-4px);
  border-color: var(--color-primary);
}
.feature-icon {
  font-size: 2rem;
  margin-bottom: .75rem;
}
.feature-card h3 {
  margin-bottom: .5rem;
  font-size: 1.1rem;
}
.feature-card p {
  color: var(--color-text-muted);
  font-size: .9rem;
}

/* ─── Plans Grid ─── */
.plan-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 1.5rem;
  align-items: start;
}
.plan-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 2.5rem 2rem;
  position: relative;
  transition: transform .2s, border-color .2s;
}
.plan-card:hover { transform: translateY(-4px); }
.plan-card.featured {
  border-color: var(--color-primary);
  box-shadow: 0 0 40px rgba(56, 189, 248, .1);
}
.plan-badge {
  position: absolute;
  top: -12px;
  left: 50%;
  transform: translateX(-50%);
  background: var(--color-primary);
  color: #0a0e1a;
  font-size: .75rem;
  font-weight: 700;
  padding: .25rem .75rem;
  border-radius: 99px;
}
.plan-card h3 {
  font-size: 1.25rem;
  margin-bottom: 1rem;
}
.plan-price {
  font-size: 2.5rem;
  font-weight: 800;
  margin-bottom: 1.5rem;
}
.plan-price .currency {
  font-size: 1.5rem;
  vertical-align: super;
}
.plan-price .period {
  font-size: .9rem;
  color: var(--color-text-muted);
  font-weight: 400;
}
.plan-card ul {
  list-style: none;
  margin-bottom: 2rem;
}
.plan-card li {
  padding: .5rem 0;
  border-bottom: 1px solid var(--color-border);
  font-size: .9rem;
  color: var(--color-text-muted);
}
.plan-card li::before {
  content: "✓ ";
  color: var(--color-success);
  font-weight: 700;
}

/* ─── Contact ─── */
.contact-grid {
  display: grid;
  grid-template-columns: 1fr 2fr;
  gap: 3rem;
  align-items: start;
}
.contact-info {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}
.contact-item strong {
  display: block;
  margin-bottom: .25rem;
  color: var(--color-text);
}
.contact-item a {
  color: var(--color-primary);
  text-decoration: none;
}
.contact-form {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}
.contact-form input,
.contact-form select,
.contact-form textarea {
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  padding: .75rem 1rem;
  color: var(--color-text);
  font-family: var(--font);
  font-size: .9rem;
  transition: border-color .2s;
}
.contact-form input:focus,
.contact-form select:focus,
.contact-form textarea:focus {
  outline: none;
  border-color: var(--color-primary);
}
.contact-form select { appearance: auto; }

/* ─── Footer ─── */
.footer {
  background: var(--color-bg);
  border-top: 1px solid var(--color-border);
  padding: 3rem 0;
}
.footer-inner {
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 2rem;
}
.footer-brand p {
  color: var(--color-text-muted);
  font-size: .8rem;
  margin-top: .5rem;
}
.footer-links {
  display: flex;
  gap: 3rem;
}
.footer-links div {
  display: flex;
  flex-direction: column;
  gap: .5rem;
}
.footer-links strong {
  margin-bottom: .25rem;
  font-size: .85rem;
}
.footer-links a {
  color: var(--color-text-muted);
  text-decoration: none;
  font-size: .85rem;
  transition: color .2s;
}
.footer-links a:hover { color: var(--color-text); }

/* ─── Skip Link (a11y) ─── */
.skip-link {
  position: absolute;
  left: -9999px;
  top: 0;
  background: var(--color-primary);
  color: #0a0e1a;
  padding: .5rem 1rem;
  font-weight: 600;
  z-index: 9999;
  border-radius: 0 0 var(--radius-sm) var(--radius-sm);
}
.skip-link:focus {
  left: 50%;
  transform: translateX(-50%);
}
.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0,0,0,0);
  white-space: nowrap;
  border: 0;
}

/* ─── Focus Visible ─── */
:focus-visible {
  outline: 2px solid var(--color-primary);
  outline-offset: 2px;
}

/* ─── Tech Strip ─── */
.tech-strip {
  text-align: center;
  padding: 1.5rem 0;
  font-size: .85rem;
  color: var(--color-text-muted);
  letter-spacing: .02em;
  border-bottom: 1px solid var(--color-border);
}

/* ─── How It Works ─── */
.how-it-works {
  padding: 6rem 0;
  background: var(--color-bg);
}
.steps-grid {
  display: flex;
  align-items: flex-start;
  justify-content: center;
  gap: 0;
  max-width: 900px;
  margin: 0 auto;
}
.step {
  flex: 1;
  text-align: center;
  padding: 0 1.5rem;
}
.step-number {
  width: 48px;
  height: 48px;
  border-radius: 50%;
  background: var(--color-primary);
  color: #0a0e1a;
  font-size: 1.25rem;
  font-weight: 800;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 1rem;
}
.step h3 {
  font-size: 1rem;
  margin-bottom: .5rem;
}
.step p {
  color: var(--color-text-muted);
  font-size: .875rem;
  line-height: 1.5;
}
.step-connector {
  width: 60px;
  min-width: 40px;
  height: 2px;
  background: var(--color-border);
  margin-top: 23px;
  flex-shrink: 0;
}

/* ─── Responsive ─── */
@media (max-width: 768px) {
  .nav-links { display: none; }
  .nav-links.open {
    display: flex;
    flex-direction: column;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: var(--color-surface);
    padding: 1.5rem;
    border-bottom: 1px solid var(--color-border);
    gap: 1rem;
  }
  .menu-toggle { display: block; }
  .contact-grid { grid-template-columns: 1fr; }
  .hero-stats { gap: 1.5rem; }
  .footer-inner { flex-direction: column; }
  .footer-links { flex-wrap: wrap; gap: 2rem; }
  .steps-grid { flex-direction: column; align-items: center; gap: 1.5rem; }
  .step-connector { width: 2px; height: 30px; margin-top: 0; }
}