/* ========================================
   Coldly — Light Minimal Landing Page
   ======================================== */

:root {
  --bg: #ffffff;
  --bg-subtle: #f7f8fa;
  --surface: #ffffff;
  --border: #e8ecf0;
  --text: #111827;
  --text-dim: #6b7280;
  --accent: #2563eb;
  --accent-light: rgba(37, 99, 235, 0.08);
  --accent-text: #1d4ed8;
  --green: #16a34a;
  --font-body: 'Inter', system-ui, sans-serif;
  --font-mono: 'JetBrains Mono', 'Fira Code', monospace;
}

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

html { font-size: 16px; scroll-behavior: smooth; }

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

/* Nav */
.nav {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 100;
  background: rgba(255,255,255,0.9);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
}
.nav-inner {
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 2rem;
  height: 60px;
  display: flex;
  align-items: center;
  gap: 0.75rem;
}
.nav-logo {
  font-weight: 700;
  font-size: 1.15rem;
  color: var(--text);
  letter-spacing: -0.03em;
}
.nav-badge {
  font-size: 0.65rem;
  color: var(--accent);
  background: var(--accent-light);
  border: 1px solid rgba(37,99,235,0.15);
  padding: 0.15rem 0.55rem;
  border-radius: 100px;
  font-weight: 500;
  letter-spacing: 0.03em;
}
.nav-links {
  margin-left: auto;
  display: flex;
  align-items: center;
  gap: 0.25rem;
}
.nav-links a {
  font-size: 0.875rem;
  color: var(--text-dim);
  text-decoration: none;
  padding: 0.4rem 0.75rem;
  border-radius: 6px;
  transition: color 0.15s, background 0.15s;
}
.nav-links a:hover { color: var(--text); background: var(--bg-subtle); }
.nav-cta {
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--accent);
  background: var(--accent-light);
  border: 1px solid rgba(37,99,235,0.15);
  padding: 0.35rem 0.85rem;
  border-radius: 7px;
  text-decoration: none;
  transition: background 0.15s;
}
.nav-cta:hover { background: rgba(37,99,235,0.14); }

/* Hero */
.hero {
  padding: 8rem 2rem 5rem;
  max-width: 1100px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  gap: 4rem;
}
.hero-inner { flex: 1; min-width: 0; }
.hero-visual { flex: 0 0 auto; width: 520px; }

.hero-headline {
  font-size: clamp(2.1rem, 4vw, 3rem);
  font-weight: 700;
  line-height: 1.15;
  color: var(--text);
  margin-bottom: 1.25rem;
  letter-spacing: -0.03em;
}
.hero-sub {
  font-size: 1.05rem;
  color: var(--text-dim);
  line-height: 1.7;
  max-width: 480px;
  margin-bottom: 2rem;
}
.hero-actions { display: flex; gap: 0.75rem; align-items: center; flex-wrap: wrap; }
.btn-primary {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  background: var(--accent);
  color: #fff;
  font-weight: 600;
  font-size: 0.95rem;
  padding: 0.7rem 1.5rem;
  border-radius: 8px;
  text-decoration: none;
  border: none;
  cursor: pointer;
  transition: background 0.15s, transform 0.1s;
}
.btn-primary:hover { background: var(--accent-text); transform: translateY(-1px); }
.hero-note {
  font-size: 0.8rem;
  color: var(--text-dim);
}
.hero-proof {
  margin-top: 2.5rem;
  display: flex;
  align-items: center;
  gap: 1.5rem;
  flex-wrap: wrap;
}
.proof-item {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.85rem;
  color: var(--text-dim);
  font-weight: 500;
}
.proof-dot {
  width: 6px; height: 6px;
  border-radius: 50%;
  background: var(--green);
  flex-shrink: 0;
}

/* Hero visual — email card mockup */
.email-mockup {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 14px;
  overflow: hidden;
  box-shadow: 0 4px 32px rgba(0,0,0,0.06), 0 0 0 1px rgba(0,0,0,0.03);
}
.mockup-bar {
  background: var(--bg-subtle);
  border-bottom: 1px solid var(--border);
  padding: 0.65rem 1rem;
  display: flex;
  align-items: center;
  gap: 0.4rem;
}
.mockup-dot { width: 9px; height: 9px; border-radius: 50%; }
.dot-red { background: #ff5f57; }
.dot-yellow { background: #febc2e; }
.dot-green { background: #28c840; }
.mockup-label {
  margin-left: 0.5rem;
  font-family: var(--font-mono);
  font-size: 0.65rem;
  color: var(--text-dim);
}
.mockup-body { padding: 1.5rem; display: flex; flex-direction: column; gap: 0.85rem; }
.mockup-field { display: flex; align-items: center; gap: 0.5rem; }
.mockup-field-label {
  font-family: var(--font-mono);
  font-size: 0.65rem;
  color: var(--text-dim);
  width: 45px;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}
.mockup-field-val {
  font-size: 0.8rem;
  color: var(--text);
  font-weight: 500;
}
.mockup-divider { height: 1px; background: var(--border); margin: 0.25rem 0; }
.mockup-email-text {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--text);
  line-height: 1.7;
  background: var(--bg-subtle);
  border: 1px solid var(--border);
  border-radius: 7px;
  padding: 0.85rem 1rem;
}
.mockup-tag {
  display: inline-block;
  background: var(--accent-light);
  color: var(--accent-text);
  font-size: 0.6rem;
  font-weight: 600;
  padding: 0.15rem 0.5rem;
  border-radius: 100px;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  margin-top: 0.35rem;
}

/* Social Proof strip */
.social-proof {
  background: var(--bg-subtle);
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
  padding: 2rem 2rem;
}
.sp-inner {
  max-width: 1100px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  gap: 3rem;
  flex-wrap: wrap;
}
.sp-stat {
  display: flex;
  flex-direction: column;
  gap: 0.15rem;
}
.sp-stat-val {
  font-size: 1.6rem;
  font-weight: 700;
  color: var(--text);
  letter-spacing: -0.03em;
}
.sp-stat-label {
  font-size: 0.8rem;
  color: var(--text-dim);
}
.sp-divider {
  width: 1px; height: 40px;
  background: var(--border);
}
.sp-testimonials {
  display: flex;
  gap: 2rem;
  flex-wrap: wrap;
}
.testimonial {
  max-width: 280px;
}
.testimonial-quote {
  font-size: 0.9rem;
  color: var(--text);
  line-height: 1.6;
  margin-bottom: 0.5rem;
  font-style: italic;
}
.testimonial-author {
  font-size: 0.8rem;
  color: var(--text-dim);
  font-weight: 500;
}

/* Sections */
.section-header {
  text-align: center;
  margin-bottom: 3.5rem;
}
.section-tag {
  display: inline-block;
  font-size: 0.7rem;
  font-weight: 600;
  color: var(--accent);
  text-transform: uppercase;
  letter-spacing: 0.12em;
  margin-bottom: 0.75rem;
}
.section-title {
  font-size: clamp(1.5rem, 3vw, 2.1rem);
  font-weight: 700;
  line-height: 1.25;
  letter-spacing: -0.02em;
  color: var(--text);
}

/* How it works */
.how-it-works {
  padding: 6rem 2rem;
  max-width: 1100px;
  margin: 0 auto;
}
.steps {
  display: flex;
  align-items: flex-start;
  gap: 0;
  justify-content: center;
  flex-wrap: wrap;
}
.step {
  flex: 1;
  min-width: 220px;
  max-width: 300px;
  padding: 0 2rem;
  text-align: center;
}
.step-icon {
  width: 56px; height: 56px;
  border-radius: 14px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 1.2rem;
  background: var(--accent-light);
  border: 1px solid rgba(37,99,235,0.12);
  color: var(--accent);
}
.step h3 {
  font-size: 1rem;
  font-weight: 600;
  color: var(--text);
  margin-bottom: 0.6rem;
}
.step p { font-size: 0.875rem; color: var(--text-dim); line-height: 1.65; }
.step-connector {
  width: 60px; height: 2px;
  background: linear-gradient(90deg, var(--border), var(--accent), var(--border));
  margin-top: 2.5rem;
  flex-shrink: 0;
  align-self: center;
}

/* Features */
.features {
  padding: 6rem 2rem;
  background: var(--bg-subtle);
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
}
.features .section-header { margin-bottom: 3rem; }
.features-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.5rem;
  max-width: 1100px;
  margin: 0 auto;
}
.feature-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 2rem;
  transition: box-shadow 0.2s, transform 0.2s;
}
.feature-card:hover {
  box-shadow: 0 4px 24px rgba(0,0,0,0.06);
  transform: translateY(-2px);
}
.feature-icon {
  width: 44px; height: 44px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--accent-light);
  border: 1px solid rgba(37,99,235,0.12);
  border-radius: 10px;
  color: var(--accent);
  margin-bottom: 1.2rem;
}
.feature-card h3 {
  font-size: 1rem;
  font-weight: 600;
  color: var(--text);
  margin-bottom: 0.6rem;
}
.feature-card p { font-size: 0.875rem; color: var(--text-dim); line-height: 1.65; }

/* Pricing */
.pricing {
  padding: 6rem 2rem;
  max-width: 1100px;
  margin: 0 auto;
}
.pricing-card {
  max-width: 480px;
  margin: 0 auto;
  background: var(--surface);
  border: 1.5px solid var(--text);
  border-radius: 16px;
  padding: 3rem;
  text-align: center;
  box-shadow: 0 4px 32px rgba(0,0,0,0.07);
}
.price-label {
  font-size: 0.7rem;
  font-weight: 600;
  color: var(--text-dim);
  text-transform: uppercase;
  letter-spacing: 0.12em;
  margin-bottom: 0.5rem;
}
.price-amount {
  font-size: 4rem;
  font-weight: 700;
  color: var(--text);
  letter-spacing: -0.05em;
  line-height: 1;
}
.price-amount span { font-size: 1.5rem; font-weight: 400; vertical-align: top; margin-top: 0.5rem; }
.price-sub { font-size: 0.875rem; color: var(--text-dim); margin-top: 0.4rem; }
.price-divider { height: 1px; background: var(--border); margin: 2rem 0; }
.price-features {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  text-align: left;
  margin-bottom: 2rem;
}
.price-features li {
  display: flex;
  align-items: flex-start;
  gap: 0.6rem;
  font-size: 0.9rem;
  color: var(--text);
}
.check-icon {
  width: 20px; height: 20px;
  border-radius: 50%;
  background: var(--accent-light);
  color: var(--accent);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  margin-top: 1px;
}
.price-tag {
  font-size: 0.8rem;
  color: var(--text-dim);
  background: var(--bg-subtle);
  border: 1px solid var(--border);
  display: inline-block;
  padding: 0.25rem 0.7rem;
  border-radius: 100px;
  margin-bottom: 1.5rem;
}
.btn-full {
  display: block;
  width: 100%;
  background: var(--accent);
  color: #fff;
  font-weight: 600;
  font-size: 0.95rem;
  padding: 0.85rem;
  border-radius: 9px;
  text-decoration: none;
  border: none;
  cursor: pointer;
  text-align: center;
  transition: background 0.15s;
}
.btn-full:hover { background: var(--accent-text); }

/* FAQ */
.faq {
  padding: 6rem 2rem;
  background: var(--bg-subtle);
  border-top: 1px solid var(--border);
}
.faq-inner {
  max-width: 680px;
  margin: 0 auto;
}
.faq-item {
  border-bottom: 1px solid var(--border);
  padding: 1.5rem 0;
}
.faq-item:first-child { border-top: 1px solid var(--border); }
.faq-q {
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--text);
  margin-bottom: 0.6rem;
}
.faq-a {
  font-size: 0.875rem;
  color: var(--text-dim);
  line-height: 1.65;
}

/* Footer */
.footer {
  padding: 3rem 2rem;
  border-top: 1px solid var(--border);
}
.footer-inner {
  max-width: 1100px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.8rem;
  text-align: center;
}
.footer-logo { font-weight: 700; font-size: 1.1rem; color: var(--text); }
.footer-desc { font-size: 0.82rem; color: var(--text-dim); }
.footer-links { display: flex; gap: 2rem; }
.footer-links a { font-size: 0.8rem; color: var(--text-dim); text-decoration: none; transition: color 0.2s; }
.footer-links a:hover { color: var(--text); }
.footer-copy { font-size: 0.75rem; color: var(--text-dim); }

/* Responsive */
@media (max-width: 900px) {
  .features-grid { grid-template-columns: 1fr; }
}
@media (max-width: 768px) {
  .hero { flex-direction: column; padding-top: 7rem; gap: 3rem; }
  .hero-visual { width: 100%; }
  .steps { flex-direction: column; gap: 2rem; }
  .step-connector { display: none; }
  .sp-inner { justify-content: center; }
}