/* Phone System Compare - TECHY theme: dark, high-contrast, platform feel */
:root {
  --color-bg: #0f172a;
  --color-bg-elevated: #1e293b;
  --color-surface: #1e293b;
  --color-border: #334155;
  --color-primary: #22d3ee;
  --color-primary-hover: #67e8f9;
  --color-accent: #818cf8;
  --color-text: #e2e8f0;
  --color-text-muted: #94a3b8;
  --font-mono: 'Consolas', 'Monaco', 'Courier New', monospace;
  --font-heading: 'Inter', 'SF Pro Display', system-ui, sans-serif;
  --font-body: system-ui, -apple-system, sans-serif;
  --radius: 6px;
  --glow: 0 0 20px rgba(34, 211, 238, 0.15);
}

* { box-sizing: border-box; }
body { margin: 0; font-family: var(--font-body); color: var(--color-text); background: var(--color-bg); line-height: 1.65; }

header {
  background: var(--color-bg-elevated);
  border-bottom: 1px solid var(--color-border);
  padding: 0.875rem 1.5rem;
  position: sticky;
  top: 0;
  z-index: 10;
}
header .wrap,
header .container { max-width: 900px; margin: 0 auto; padding: 0 1.5rem; display: flex; justify-content: space-between; align-items: center; }
.site-name {
  font-family: var(--font-mono);
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--color-primary);
  letter-spacing: 0.02em;
}
nav a { color: var(--color-text-muted); text-decoration: none; margin-left: 1.5rem; font-size: 0.9rem; }
nav a:hover { color: var(--color-primary); }

.container { max-width: 900px; margin: 0 auto; padding: 0 1.5rem; }

.hero {
  padding: 4rem 0 3rem;
  text-align: center;
  border-bottom: 1px solid var(--color-border);
}
.hero h1 {
  font-family: var(--font-heading);
  font-size: clamp(1.75rem, 4vw, 2.5rem);
  font-weight: 700;
  color: var(--color-text);
  margin: 0 0 0.75rem;
  letter-spacing: -0.02em;
}
.hero .tagline { font-size: 1.1rem; color: var(--color-text-muted); max-width: 560px; margin: 0 auto; line-height: 1.6; }
.hero .badge {
  display: inline-block;
  margin-top: 1.25rem;
  padding: 0.35rem 0.75rem;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--color-primary);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
}

.section { padding: 3rem 0; border-bottom: 1px solid var(--color-border); }
.section:last-of-type { border-bottom: none; }
.section h2 {
  font-family: var(--font-heading);
  font-size: 1.35rem;
  font-weight: 600;
  color: var(--color-text);
  margin: 0 0 1.25rem;
}
.section h3 { font-size: 1.1rem; color: var(--color-primary); margin: 1.5rem 0 0.5rem; }
.section p { margin: 0 0 0.85rem; color: var(--color-text-muted); font-size: 0.95rem; }

.grid-2 { display: grid; grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); gap: 1rem; margin-top: 1rem; }
.card {
  background: var(--color-bg-elevated);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 1.25rem;
}
.card h3 { margin: 0 0 0.5rem; font-size: 1rem; }
.card p { margin: 0; font-size: 0.875rem; }

.provider-list {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-top: 1rem;
}
.provider-list span {
  display: inline-block;
  padding: 0.4rem 0.75rem;
  font-family: var(--font-mono);
  font-size: 0.8rem;
  background: var(--color-bg-elevated);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  color: var(--color-text-muted);
}

.criteria-list { list-style: none; padding: 0; margin: 1rem 0 0; }
.criteria-list li {
  padding: 0.6rem 0;
  border-bottom: 1px solid var(--color-border);
  display: flex;
  align-items: center;
  gap: 0.75rem;
  font-size: 0.95rem;
  color: var(--color-text-muted);
}
.criteria-list li:last-child { border-bottom: none; }
.criteria-list .icon { color: var(--color-primary); font-family: var(--font-mono); font-size: 0.85rem; }

.steps { margin: 1.5rem 0 0; }
.step {
  display: flex;
  gap: 1rem;
  margin-bottom: 1.25rem;
  padding-bottom: 1.25rem;
  border-bottom: 1px solid var(--color-border);
}
.step:last-child { border-bottom: none; margin-bottom: 0; padding-bottom: 0; }
.step-num {
  flex-shrink: 0;
  width: 2rem;
  height: 2rem;
  background: var(--color-primary);
  color: var(--color-bg);
  font-family: var(--font-mono);
  font-size: 0.9rem;
  font-weight: 600;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius);
}
.step h3 { margin: 0 0 0.25rem; }
.step p { margin: 0; font-size: 0.9rem; }

.stats-row { display: flex; flex-wrap: wrap; gap: 2rem; margin: 2rem 0; justify-content: center; }
.stats-row .stat { text-align: center; }
.stats-row .stat .num { font-family: var(--font-heading); font-size: 1.75rem; font-weight: 700; color: var(--color-primary); display: block; }
.stats-row .stat .label { font-size: 0.9rem; color: var(--color-text-muted); }

.faq-list { margin-top: 1rem; }
.faq-item { margin-bottom: 1.25rem; }
.faq-item h3 { font-size: 1rem; margin: 0 0 0.35rem; color: var(--color-text); }
.faq-item p { margin: 0; font-size: 0.9rem; }

.cta-box {
  background: var(--color-bg-elevated);
  border: 1px solid var(--color-primary);
  border-radius: var(--radius);
  padding: 2.5rem;
  margin: 2rem 0;
  box-shadow: var(--glow);
}
.cta-box h2 { margin-top: 0; }
.cta-box p { margin-bottom: 1.5rem; }
.form-group { margin-bottom: 1rem; }
.form-group label { display: block; font-weight: 600; margin-bottom: 0.35rem; font-size: 0.875rem; color: var(--color-text); }
.form-group input,
.form-group textarea {
  width: 100%;
  padding: 0.6rem 0.85rem;
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  color: var(--color-text);
  font: inherit;
}
.form-group input::placeholder,
.form-group textarea::placeholder { color: var(--color-text-muted); opacity: 0.7; }
.form-group textarea { min-height: 90px; resize: vertical; }
.form-group.hp { position: absolute; left: -9999px; width: 1px; height: 1px; overflow: hidden; }
button[type="submit"] {
  background: var(--color-primary);
  color: var(--color-bg);
  border: none;
  padding: 0.65rem 1.5rem;
  border-radius: var(--radius);
  font-family: var(--font-mono);
  font-size: 0.9rem;
  font-weight: 600;
  cursor: pointer;
}
button[type="submit"]:hover { background: var(--color-primary-hover); color: var(--color-bg); }
.form-feedback { margin-top: 1rem; font-size: 0.9rem; }
.form-feedback.success { color: var(--color-primary); }
.form-feedback.error { color: #f87171; }

footer {
  margin-top: 3rem;
  padding: 2rem 1.5rem;
  border-top: 1px solid var(--color-border);
  background: var(--color-bg-elevated);
  font-size: 0.8rem;
  color: var(--color-text-muted);
  text-align: center;
}
footer p { margin: 0; max-width: 540px; margin-left: auto; margin-right: auto; }