/* styles.css — Custom CSS variables, fonts, and animations */
/* Vibe: Dark, minimal, editorial — Linear.app / Raycast aesthetic */

@import url('https://fonts.googleapis.com/css2?family=Instrument+Serif:ital@0;1&family=Satoshi:wght@300;400;500;600;700&display=swap');

:root {
  /* Colors */
  --bg:         #0a0a0a;
  --bg-2:       #111111;
  --bg-3:       #1a1a1a;
  --border:     rgba(255, 255, 255, 0.08);
  --border-hover: rgba(255, 255, 255, 0.16);
  --accent:     #10b981;
  --accent-dim: rgba(16, 185, 129, 0.12);
  --accent-glow: rgba(16, 185, 129, 0.25);
  --text:       #f5f5f5;
  --text-2:     #a3a3a3;
  --text-3:     #6b6b6b;

  /* Typography */
  --font-display: 'Instrument Serif', Georgia, serif;
  --font-body:    'Satoshi', system-ui, sans-serif;

  /* Spacing */
  --section-py: 7rem;
  --container:  1100px;

  /* Transitions */
  --ease:       0.2s ease;
}

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

html {
  scroll-behavior: smooth;
}

body {
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-body);
  font-size: 1rem;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

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

/* ─── Nav ────────────────────────────────────────────── */
nav {
  position: sticky;
  top: 0;
  z-index: 100;
  border-bottom: 1px solid var(--border);
  background: rgba(10, 10, 10, 0.85);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
}

.nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 60px;
}

.nav-logo {
  font-family: var(--font-display);
  font-size: 1.25rem;
  color: var(--text);
  text-decoration: none;
  letter-spacing: -0.01em;
  transition: opacity var(--ease);
}
.nav-logo:hover { opacity: 0.7; }

/* ─── Buttons ─────────────────────────────────────────── */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.55rem 1.2rem;
  border-radius: 6px;
  font-family: var(--font-body);
  font-size: 0.875rem;
  font-weight: 500;
  cursor: pointer;
  transition: background var(--ease), box-shadow var(--ease), transform var(--ease);
  text-decoration: none;
  border: none;
  outline: none;
}

.btn:active { transform: translateY(1px); }

.btn-primary {
  background: var(--accent);
  color: #0a0a0a;
}
.btn-primary:hover {
  background: #0ea472;
  box-shadow: 0 0 20px var(--accent-glow);
}

.btn-ghost {
  background: transparent;
  color: var(--text);
  border: 1px solid var(--border);
}
.btn-ghost:hover {
  border-color: var(--border-hover);
  background: var(--bg-2);
}

/* ─── Hero ────────────────────────────────────────────── */
.hero {
  padding: 7rem 0 5rem;
  text-align: center;
  position: relative;
  overflow: hidden;
}

/* Subtle radial glow behind hero */
.hero::before {
  content: '';
  position: absolute;
  top: -10%;
  left: 50%;
  transform: translateX(-50%);
  width: 700px;
  height: 400px;
  background: radial-gradient(ellipse, rgba(16, 185, 129, 0.08) 0%, transparent 70%);
  pointer-events: none;
  z-index: 0;
}

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

.hero-badge {
  display: inline-block;
  padding: 0.3rem 0.8rem;
  border: 1px solid var(--border);
  border-radius: 999px;
  font-size: 0.75rem;
  color: var(--accent);
  letter-spacing: 0.04em;
  text-transform: uppercase;
  margin-bottom: 1.75rem;
  background: var(--accent-dim);
}

.hero h1 {
  font-family: var(--font-display);
  font-size: clamp(2.5rem, 6vw, 4.5rem);
  line-height: 1.1;
  letter-spacing: -0.02em;
  color: var(--text);
  margin-bottom: 1.25rem;
  max-width: 800px;
  margin-left: auto;
  margin-right: auto;
}

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

.hero-sub {
  font-size: 1.125rem;
  color: var(--text-2);
  max-width: 520px;
  margin: 0 auto 2.5rem;
  line-height: 1.65;
}

/* ─── Inline email capture form ─────────────────────── */
.waitlist-form {
  display: flex;
  gap: 0.5rem;
  max-width: 440px;
  margin: 0 auto;
}

.waitlist-input {
  flex: 1;
  padding: 0.65rem 1rem;
  background: var(--bg-2);
  border: 1px solid var(--border);
  border-radius: 6px;
  color: var(--text);
  font-family: var(--font-body);
  font-size: 0.9375rem;
  outline: none;
  transition: border-color var(--ease), box-shadow var(--ease);
}

.waitlist-input::placeholder { color: var(--text-3); }
.waitlist-input:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-dim);
}

.form-success {
  display: none;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.65rem 1.2rem;
  background: var(--accent-dim);
  border: 1px solid var(--accent);
  border-radius: 6px;
  color: var(--accent);
  font-size: 0.9375rem;
  font-weight: 500;
  max-width: 440px;
  margin: 0 auto;
}

.form-success.visible { display: flex; }
.waitlist-form.hidden  { display: none; }

.hero-subtext {
  margin-top: 0.85rem;
  font-size: 0.8125rem;
  color: var(--text-3);
}

/* ─── Features ───────────────────────────────────────── */
.features {
  padding: var(--section-py) 0;
  border-top: 1px solid var(--border);
}

.section-label {
  font-size: 0.75rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 1.25rem;
}

.features-header h2 {
  font-family: var(--font-display);
  font-size: clamp(1.75rem, 4vw, 2.75rem);
  letter-spacing: -0.02em;
  line-height: 1.15;
  max-width: 480px;
}

.features-header p {
  color: var(--text-2);
  max-width: 440px;
  margin-top: 0.75rem;
}

.features-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 1.5rem;
  margin-top: 3.5rem;
}

.feature-card {
  background: var(--bg-2);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 1.75rem;
  transition: border-color var(--ease), transform var(--ease), box-shadow var(--ease);
}

.feature-card:hover {
  border-color: var(--border-hover);
  transform: translateY(-2px);
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.4);
}

.feature-icon {
  width: 36px;
  height: 36px;
  border-radius: 8px;
  background: var(--accent-dim);
  border: 1px solid rgba(16, 185, 129, 0.2);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 1.1rem;
  font-size: 1rem;
}

.feature-card h3 {
  font-family: var(--font-display);
  font-size: 1.175rem;
  letter-spacing: -0.01em;
  margin-bottom: 0.5rem;
  color: var(--text);
}

.feature-card p {
  color: var(--text-2);
  font-size: 0.9375rem;
  line-height: 1.6;
}

/* ─── FAQ ────────────────────────────────────────────── */
.faq {
  padding: var(--section-py) 0;
  border-top: 1px solid var(--border);
}

.faq h2 {
  font-family: var(--font-display);
  font-size: clamp(1.75rem, 4vw, 2.5rem);
  letter-spacing: -0.02em;
  margin-bottom: 2.5rem;
}

.faq-list {
  max-width: 680px;
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0;
}

.faq-item {
  border-bottom: 1px solid var(--border);
}

.faq-item:first-child {
  border-top: 1px solid var(--border);
}

.faq-q {
  width: 100%;
  text-align: left;
  background: none;
  border: none;
  color: var(--text);
  font-family: var(--font-body);
  font-size: 1rem;
  font-weight: 500;
  padding: 1.1rem 0;
  cursor: pointer;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 1rem;
  transition: color var(--ease);
}

.faq-q:hover { color: var(--accent); }

.faq-chevron {
  flex-shrink: 0;
  width: 16px;
  height: 16px;
  transition: transform var(--ease);
  color: var(--text-3);
}

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

.faq-a {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.3s ease, padding 0.3s ease;
  color: var(--text-2);
  font-size: 0.9375rem;
  line-height: 1.65;
}

.faq-item.open .faq-a {
  max-height: 200px;
  padding-bottom: 1.1rem;
}

/* ─── Footer ─────────────────────────────────────────── */
footer {
  border-top: 1px solid var(--border);
  padding: 2.5rem 0;
}

.footer-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  flex-wrap: wrap;
}

.footer-logo {
  font-family: var(--font-display);
  font-size: 1rem;
  color: var(--text);
}

.footer-tagline {
  font-size: 0.8125rem;
  color: var(--text-3);
}

.footer-copy {
  font-size: 0.8125rem;
  color: var(--text-3);
}

/* ─── Responsive ─────────────────────────────────────── */
@media (max-width: 640px) {
  :root { --section-py: 4rem; }

  .waitlist-form {
    flex-direction: column;
  }

  .footer-inner {
    flex-direction: column;
    align-items: flex-start;
    gap: 0.5rem;
  }
}