/* NeSpish landing — pure CSS, dark + light theme. */

*, *::before, *::after { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
html { scroll-behavior: smooth; }

:root {
  --radius: 20px;
  --radius-sm: 12px;
  --font-display: "SF Pro Display", -apple-system, BlinkMacSystemFont, "Segoe UI", system-ui, sans-serif;
  --font-sans: -apple-system, BlinkMacSystemFont, "SF Pro Text", "Segoe UI", system-ui, sans-serif;
  --container: 1120px;
}

/* DARK (default) */
[data-theme="dark"] {
  --bg: #0b0a14;
  --fg: #f5f5f7;
  --muted: #a8a8b3;
  --card: rgba(255,255,255,0.05);
  --card-border: rgba(255,255,255,0.10);
  --glass: rgba(255,255,255,0.06);
  --aurora-1: #8a5cf6;   /* violet */
  --aurora-2: #4cc9f0;   /* cyan   */
  --aurora-3: #f472b6;   /* pink   */
  --primary: #a78bfa;
  --primary-fg: #0b0a14;
  --vignette: radial-gradient(circle at 50% 0%, transparent, rgba(11,10,20,0.65) 70%);
  --shadow-glow: 0 0 60px -10px rgba(76,201,240,0.45), 0 24px 60px -20px rgba(0,0,0,0.55);
}

/* LIGHT */
[data-theme="light"] {
  --bg: #f6f7fb;
  --fg: #1a1a22;
  --muted: #5b5b6b;
  --card: rgba(255,255,255,0.75);
  --card-border: rgba(20,20,30,0.08);
  --glass: rgba(255,255,255,0.6);
  --aurora-1: #6c8dff;
  --aurora-2: #7ad0ff;
  --aurora-3: #b9a0ff;
  --primary: #2563eb;
  --primary-fg: #ffffff;
  --vignette: radial-gradient(circle at 50% 0%, transparent, rgba(246,247,251,0.55) 80%);
  --shadow-glow: 0 0 50px -10px rgba(37,99,235,0.35), 0 18px 50px -22px rgba(20,20,30,0.18);
}

body {
  background: var(--bg);
  color: var(--fg);
  font-family: var(--font-sans);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  overflow-x: hidden;
  min-height: 100vh;
  line-height: 1.5;
  transition: background-color .4s ease, color .4s ease;
}

h1, h2, h3 {
  font-family: var(--font-display);
  letter-spacing: -0.02em;
  margin: 0;
}

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

/* ---------- Aurora ---------- */
.aurora {
  position: fixed; inset: 0; z-index: -1; pointer-events: none; overflow: hidden;
}
.cloud {
  position: absolute; border-radius: 9999px; filter: blur(80px); opacity: 0.55;
  will-change: transform;
}
.cloud-1 { background: var(--aurora-1); width: 520px; height: 520px; top: -10%; left: -10%; animation: drift1 22s ease-in-out infinite; }
.cloud-2 { background: var(--aurora-2); width: 480px; height: 480px; top: 10%; right: -15%; animation: drift2 26s ease-in-out infinite; }
.cloud-3 { background: var(--aurora-3); width: 600px; height: 600px; bottom: -25%; left: 20%; animation: drift3 30s ease-in-out infinite; }
.vignette { position: absolute; inset: 0; background: var(--vignette); }

@keyframes drift1 { 0%,100% { transform: translate3d(-10%,-10%,0) scale(1); } 50% { transform: translate3d(15%,5%,0) scale(1.15); } }
@keyframes drift2 { 0%,100% { transform: translate3d(20%,10%,0) scale(1.1); }  50% { transform: translate3d(-5%,-10%,0) scale(0.95); } }
@keyframes drift3 { 0%,100% { transform: translate3d(0,20%,0) scale(1); }       50% { transform: translate3d(-15%,-5%,0) scale(1.2); } }

/* ---------- Nav ---------- */
.nav {
  max-width: var(--container);
  margin: 0 auto;
  padding: 22px 24px;
  display: flex; align-items: center; gap: 24px;
}
.brand { display: inline-flex; align-items: center; gap: 10px; font-weight: 600; font-size: 18px; }
.brand-dot {
  width: 12px; height: 12px; border-radius: 50%;
  background: linear-gradient(135deg, var(--aurora-1), var(--aurora-3));
  box-shadow: 0 0 18px var(--aurora-1);
}
.nav-links { margin-left: auto; display: flex; gap: 22px; font-size: 14px; color: var(--muted); }
.nav-links a:hover { color: var(--fg); }

.theme-toggle {
  background: var(--glass); color: var(--fg);
  border: 1px solid var(--card-border);
  border-radius: 999px; width: 38px; height: 38px;
  display: inline-flex; align-items: center; justify-content: center;
  cursor: pointer; backdrop-filter: blur(20px);
  transition: transform .2s ease, background-color .2s ease;
}
.theme-toggle:hover { transform: translateY(-1px); }
[data-theme="dark"] .icon-sun { display: none; }
[data-theme="light"] .icon-moon { display: none; }

@media (max-width: 720px) {
  .nav-links { display: none; }
}

/* ---------- Hero ---------- */
.hero {
  max-width: var(--container);
  margin: 0 auto;
  padding: 60px 24px 80px;
  text-align: center;
}
.hero-inner { max-width: 780px; margin: 0 auto; }

.badge {
  display: inline-block;
  padding: 6px 14px; border-radius: 999px;
  background: var(--glass);
  border: 1px solid var(--card-border);
  backdrop-filter: blur(20px);
  font-size: 12px; letter-spacing: 0.04em; text-transform: uppercase;
  color: var(--muted);
  margin-bottom: 24px;
}

h1 {
  font-size: clamp(40px, 7vw, 72px);
  line-height: 1.05;
  font-weight: 700;
  margin-bottom: 20px;
}
.grad {
  background: linear-gradient(135deg, var(--aurora-1), var(--aurora-3));
  -webkit-background-clip: text; background-clip: text; color: transparent;
}
.lede {
  font-size: clamp(16px, 2vw, 19px);
  color: var(--muted);
  max-width: 620px; margin: 0 auto 36px;
}

.cta-row {
  display: flex; gap: 12px; justify-content: center; flex-wrap: wrap; margin-bottom: 40px;
}

.btn {
  display: inline-flex; align-items: center; gap: 10px;
  padding: 14px 24px;
  border-radius: 999px;
  font-size: 15px; font-weight: 600;
  cursor: pointer; border: 1px solid transparent;
  transition: transform .2s ease, box-shadow .2s ease, background-color .2s ease, color .2s ease;
}
.btn:hover { transform: translateY(-2px); }
.btn-primary {
  background: linear-gradient(135deg, var(--aurora-1), var(--aurora-3));
  color: var(--primary-fg);
  box-shadow: var(--shadow-glow);
}
.btn-ghost {
  background: var(--glass); color: var(--fg);
  border-color: var(--card-border); backdrop-filter: blur(20px);
}
.btn-lg { padding: 18px 32px; font-size: 16px; }

.trust {
  list-style: none; padding: 0; margin: 0;
  display: flex; gap: 36px; justify-content: center; flex-wrap: wrap;
  color: var(--muted); font-size: 14px;
}
.trust strong { color: var(--fg); font-size: 18px; display: block; font-weight: 600; }

/* ---------- Sections ---------- */
section { max-width: var(--container); margin: 0 auto; padding: 80px 24px; }
section h2 {
  font-size: clamp(28px, 4vw, 40px);
  text-align: center; margin-bottom: 48px;
}

/* ---------- Features ---------- */
.grid {
  display: grid; gap: 16px;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
}
.card {
  background: var(--card);
  border: 1px solid var(--card-border);
  backdrop-filter: blur(28px) saturate(160%);
  -webkit-backdrop-filter: blur(28px) saturate(160%);
  border-radius: var(--radius);
  padding: 28px;
  transition: transform .3s ease, border-color .3s ease;
}
.card:hover { transform: translateY(-4px); border-color: var(--aurora-2); }
.card-icon { font-size: 28px; margin-bottom: 14px; }
.card h3 { font-size: 18px; margin-bottom: 8px; }
.card p { color: var(--muted); font-size: 14px; margin: 0; }

/* ---------- How ---------- */
.steps {
  list-style: none; padding: 0; margin: 0 0 48px;
  display: grid; gap: 18px;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
}
.steps li {
  display: flex; gap: 16px; align-items: flex-start;
  background: var(--card);
  border: 1px solid var(--card-border);
  backdrop-filter: blur(28px);
  border-radius: var(--radius);
  padding: 24px;
}
.step-n {
  flex: 0 0 auto;
  width: 36px; height: 36px; border-radius: 50%;
  display: inline-flex; align-items: center; justify-content: center;
  background: linear-gradient(135deg, var(--aurora-1), var(--aurora-3));
  color: var(--primary-fg); font-weight: 700;
}
.steps h3 { font-size: 17px; margin-bottom: 4px; }
.steps p { color: var(--muted); font-size: 14px; margin: 0; }

.cta-center { text-align: center; }

/* ---------- FAQ ---------- */
.faq-grid { display: grid; gap: 12px; max-width: 760px; margin: 0 auto; }
.faq details {
  background: var(--card);
  border: 1px solid var(--card-border);
  backdrop-filter: blur(28px);
  border-radius: var(--radius-sm);
  padding: 18px 22px;
  transition: border-color .2s ease;
}
.faq details[open] { border-color: var(--aurora-2); }
.faq summary {
  cursor: pointer; font-weight: 600; font-size: 15px;
  list-style: none; display: flex; justify-content: space-between; align-items: center;
}
.faq summary::after { content: "+"; color: var(--muted); font-size: 20px; transition: transform .2s ease; }
.faq details[open] summary::after { transform: rotate(45deg); }
.faq summary::-webkit-details-marker { display: none; }
.faq p { color: var(--muted); font-size: 14px; margin: 12px 0 0; }

/* ---------- Footer ---------- */
.footer {
  max-width: var(--container);
  margin: 0 auto;
  padding: 32px 24px 48px;
  display: flex; justify-content: space-between; align-items: center;
  color: var(--muted); font-size: 13px;
  border-top: 1px solid var(--card-border);
  flex-wrap: wrap; gap: 12px;
}
.footer-links a:hover { color: var(--fg); }

@media (prefers-reduced-motion: reduce) {
  .cloud { animation: none; }
  .btn:hover, .card:hover, .theme-toggle:hover { transform: none; }
  html { scroll-behavior: auto; }
}