/* TermSmith — termsmith.app
   Pure CSS, no frameworks, mobile-first responsive
   Dark theme: Navy #111827, Accent #00ff88, Mist #94a3b8
   -------------------------------------------------------- */

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

:root {
  --navy: #111827;
  --navy-light: #1f2937;
  --navy-lighter: #374151;
  --accent: #00ff88;
  --accent-dim: #10b981;
  --white: #ffffff;
  --mist: #94a3b8;
  --mist-light: #cbd5e1;
  --font-stack: -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --max-width: 1120px;
  --radius: 12px;
  --radius-sm: 8px;
}

html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: var(--font-stack);
  background: var(--navy);
  color: var(--white);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

a {
  color: var(--accent);
  text-decoration: none;
  transition: opacity 0.2s;
}

a:hover {
  opacity: 0.8;
}

img {
  max-width: 100%;
  display: block;
}

/* ---- Layout ---- */

.container {
  width: 100%;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 24px;
}

section {
  padding: 80px 0;
}

@media (min-width: 768px) {
  section {
    padding: 120px 0;
  }
}

/* ---- Navigation ---- */

.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  background: rgba(17, 24, 39, 0.85);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid rgba(255, 255, 255, 0.06);
}

.nav .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 64px;
}

.nav-logo {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--white);
  letter-spacing: -0.02em;
}

.nav-logo span {
  color: var(--accent);
}

.nav-links {
  display: flex;
  gap: 28px;
  list-style: none;
}

.nav-links a {
  color: var(--mist);
  font-size: 0.875rem;
  font-weight: 500;
  transition: color 0.2s;
}

.nav-links a:hover {
  color: var(--white);
  opacity: 1;
}

/* ---- Hero ---- */

.hero {
  padding-top: 140px;
  padding-bottom: 80px;
  text-align: center;
}

@media (min-width: 768px) {
  .hero {
    padding-top: 180px;
    padding-bottom: 120px;
  }
}

.hero-badge {
  display: inline-block;
  padding: 6px 16px;
  border-radius: 100px;
  background: rgba(0, 255, 136, 0.1);
  border: 1px solid rgba(0, 255, 136, 0.2);
  color: var(--accent);
  font-size: 0.8125rem;
  font-weight: 600;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  margin-bottom: 24px;
}

.hero h1 {
  font-size: clamp(2.5rem, 6vw, 4.5rem);
  font-weight: 800;
  letter-spacing: -0.03em;
  line-height: 1.1;
  margin-bottom: 16px;
}

.hero h1 .accent {
  color: var(--accent);
}

.hero-tagline {
  font-size: clamp(1.125rem, 2.5vw, 1.5rem);
  color: var(--mist-light);
  font-weight: 400;
  margin-bottom: 12px;
}

.hero-description {
  max-width: 560px;
  margin: 0 auto 40px;
  color: var(--mist);
  font-size: 1.0625rem;
  line-height: 1.7;
}

.app-store-btn {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 14px 32px;
  background: var(--white);
  color: var(--navy);
  border-radius: var(--radius);
  font-size: 1rem;
  font-weight: 600;
  transition: transform 0.2s, box-shadow 0.2s;
}

.app-store-btn:hover {
  opacity: 1;
  transform: translateY(-2px);
  box-shadow: 0 8px 30px rgba(0, 255, 136, 0.15);
}

.app-store-btn svg {
  width: 22px;
  height: 22px;
}

/* ---- Features ---- */

.features {
  background: var(--navy-light);
}

.section-label {
  font-size: 0.8125rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 12px;
}

.section-title {
  font-size: clamp(1.75rem, 4vw, 2.75rem);
  font-weight: 700;
  letter-spacing: -0.02em;
  margin-bottom: 16px;
}

.section-subtitle {
  color: var(--mist);
  font-size: 1.0625rem;
  max-width: 560px;
  line-height: 1.7;
  margin-bottom: 48px;
}

.features-grid {
  display: grid;
  gap: 20px;
}

@media (min-width: 640px) {
  .features-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (min-width: 960px) {
  .features-grid {
    grid-template-columns: repeat(3, 1fr);
  }
}

.feature-card {
  background: var(--navy);
  border: 1px solid rgba(255, 255, 255, 0.06);
  border-radius: var(--radius);
  padding: 28px;
  transition: border-color 0.3s, transform 0.2s;
}

.feature-card:hover {
  border-color: rgba(0, 255, 136, 0.25);
  transform: translateY(-2px);
}

.feature-icon {
  width: 44px;
  height: 44px;
  border-radius: var(--radius-sm);
  background: rgba(0, 255, 136, 0.1);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 16px;
  font-size: 1.25rem;
}

.feature-card h3 {
  font-size: 1.0625rem;
  font-weight: 600;
  margin-bottom: 8px;
}

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

/* ---- Credibility ---- */

.credibility .container {
  max-width: 720px;
  text-align: center;
}

.credibility-quote {
  font-size: clamp(1.125rem, 2.5vw, 1.375rem);
  color: var(--mist-light);
  line-height: 1.7;
  margin-bottom: 32px;
  font-style: italic;
}

.credibility-author {
  font-weight: 600;
  font-size: 1.0625rem;
  margin-bottom: 4px;
}

.credibility-role {
  color: var(--mist);
  font-size: 0.9375rem;
  line-height: 1.6;
}

/* ---- Pricing ---- */

.pricing {
  background: var(--navy-light);
  text-align: center;
}

.pricing-cards {
  display: grid;
  gap: 20px;
  max-width: 640px;
  margin: 0 auto;
}

@media (min-width: 640px) {
  .pricing-cards {
    grid-template-columns: repeat(2, 1fr);
  }
}

.pricing-card {
  background: var(--navy);
  border: 1px solid rgba(255, 255, 255, 0.06);
  border-radius: var(--radius);
  padding: 32px 28px;
  text-align: left;
}

.pricing-card.featured {
  border-color: var(--accent);
  position: relative;
}

.pricing-card.featured::before {
  content: 'Best Value';
  position: absolute;
  top: -12px;
  left: 24px;
  background: var(--accent);
  color: var(--navy);
  font-size: 0.75rem;
  font-weight: 700;
  padding: 4px 12px;
  border-radius: 100px;
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

.pricing-tier {
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--mist);
  text-transform: uppercase;
  letter-spacing: 0.06em;
  margin-bottom: 8px;
}

.pricing-price {
  font-size: 2.25rem;
  font-weight: 800;
  letter-spacing: -0.03em;
  margin-bottom: 4px;
}

.pricing-price span {
  font-size: 1rem;
  font-weight: 400;
  color: var(--mist);
}

.pricing-note {
  color: var(--mist);
  font-size: 0.875rem;
  margin-bottom: 20px;
}

.pricing-features {
  list-style: none;
}

.pricing-features li {
  padding: 6px 0;
  font-size: 0.9375rem;
  color: var(--mist-light);
  display: flex;
  align-items: center;
  gap: 8px;
}

.pricing-features li::before {
  content: '✓';
  color: var(--accent);
  font-weight: 700;
  font-size: 0.875rem;
}

/* ---- Footer ---- */

.footer {
  padding: 40px 0;
  border-top: 1px solid rgba(255, 255, 255, 0.06);
}

.footer .container {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 16px;
  text-align: center;
}

@media (min-width: 640px) {
  .footer .container {
    flex-direction: row;
    justify-content: space-between;
    text-align: left;
  }
}

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

.footer-links {
  display: flex;
  gap: 24px;
  list-style: none;
}

.footer-links a {
  color: var(--mist);
  font-size: 0.8125rem;
  transition: color 0.2s;
}

.footer-links a:hover {
  color: var(--white);
  opacity: 1;
}

/* ---- Sub-pages (Privacy, Terms) ---- */

.page-header {
  padding-top: 120px;
  padding-bottom: 40px;
}

.page-header h1 {
  font-size: clamp(2rem, 4vw, 3rem);
  font-weight: 700;
  letter-spacing: -0.02em;
}

.page-header .page-date {
  color: var(--mist);
  margin-top: 8px;
  font-size: 0.9375rem;
}

.page-content {
  padding-bottom: 80px;
}

.page-content .container {
  max-width: 720px;
}

.page-content p,
.page-content li {
  color: var(--mist-light);
  font-size: 1rem;
  line-height: 1.8;
}

.page-content h2 {
  font-size: 1.375rem;
  font-weight: 600;
  margin-top: 40px;
  margin-bottom: 12px;
}

.page-content ul,
.page-content ol {
  padding-left: 20px;
  margin-bottom: 16px;
}

.placeholder-notice {
  background: var(--navy-light);
  border: 1px dashed var(--navy-lighter);
  border-radius: var(--radius);
  padding: 40px 28px;
  text-align: center;
  color: var(--mist);
  font-size: 0.9375rem;
}