/* ==========================================================================
   NotifyME / NotifyLog — Clean, Minimal Design System
   No shiny gimmicks, high readability, fast loading, 100% responsive
   ========================================================================== */

:root {
  --bg-color: #FAFAFA;
  --surface-color: #FFFFFF;
  --text-main: #0F172A;
  --text-muted: #475569;
  --text-light: #94A3B8;
  --border-color: #E2E8F0;
  --border-subtle: #F1F5F9;
  --brand-color: #10B981;
  --brand-dark: #047857;
  --brand-light: #ECFDF5;
  --brand-border: #A7F3D0;
  --max-width: 860px;
  --font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 14px;
}

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

body {
  font-family: var(--font-family);
  background-color: var(--bg-color);
  color: var(--text-main);
  line-height: 1.65;
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* Container */
.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 24px;
}

/* Header & Nav */
.header {
  border-bottom: 1px solid var(--border-color);
  background-color: var(--surface-color);
  position: sticky;
  top: 0;
  z-index: 100;
}

.nav-container {
  display: flex;
  justify-content: space-between;
  align-items: center;
  height: 68px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 12px;
  text-decoration: none;
  color: var(--text-main);
  font-weight: 700;
  font-size: 19px;
  letter-spacing: -0.02em;
}

.brand-icon {
  width: 36px;
  height: 36px;
  border-radius: var(--radius-sm);
  display: block;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 24px;
  list-style: none;
}

.nav-links a {
  text-decoration: none;
  color: var(--text-muted);
  font-size: 14px;
  font-weight: 500;
  transition: color 0.15s ease;
}

.nav-links a:hover,
.nav-links a.active {
  color: var(--text-main);
}

.btn-nav {
  padding: 8px 14px;
  background-color: var(--text-main);
  color: #FFFFFF !important;
  border-radius: var(--radius-sm);
  font-size: 13px !important;
  font-weight: 600 !important;
  transition: opacity 0.15s ease;
}

.btn-nav:hover {
  opacity: 0.9;
}

/* Hero Section */
.hero {
  padding: 64px 0 48px 0;
  text-align: left;
}

.badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px 10px;
  background-color: var(--brand-light);
  border: 1px solid var(--brand-border);
  color: var(--brand-dark);
  font-size: 13px;
  font-weight: 600;
  border-radius: 999px;
  margin-bottom: 20px;
}

.badge-dot {
  width: 7px;
  height: 7px;
  background-color: var(--brand-color);
  border-radius: 50%;
}

h1 {
  font-size: 38px;
  font-weight: 800;
  letter-spacing: -0.03em;
  line-height: 1.2;
  margin-bottom: 16px;
  color: var(--text-main);
}

.hero p {
  font-size: 19px;
  color: var(--text-muted);
  line-height: 1.5;
  margin-bottom: 28px;
  max-width: 720px;
}

.cta-group {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-bottom: 32px;
}

.btn-primary {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 12px 20px;
  background-color: var(--text-main);
  color: #FFFFFF;
  text-decoration: none;
  border-radius: var(--radius-sm);
  font-size: 15px;
  font-weight: 600;
  transition: background-color 0.15s ease;
}

.btn-primary:hover {
  background-color: #1E293B;
}

.btn-secondary {
  display: inline-flex;
  align-items: center;
  padding: 12px 20px;
  background-color: var(--surface-color);
  color: var(--text-main);
  text-decoration: none;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  font-size: 15px;
  font-weight: 500;
  transition: border-color 0.15s ease;
}

.btn-secondary:hover {
  border-color: #94A3B8;
}

/* Callout Box (Data Collection Highlight) */
.notice-box {
  background-color: var(--surface-color);
  border: 1px solid var(--border-color);
  border-left: 4px solid var(--brand-color);
  border-radius: var(--radius-md);
  padding: 20px 24px;
  margin: 36px 0;
}

.notice-box h3 {
  font-size: 16px;
  font-weight: 700;
  color: var(--text-main);
  margin-bottom: 8px;
  display: flex;
  align-items: center;
  gap: 8px;
}

.notice-box p {
  font-size: 14.5px;
  color: var(--text-muted);
  line-height: 1.6;
  margin-bottom: 8px;
}

.notice-box p:last-child {
  margin-bottom: 0;
}

/* Core Features Grid */
.features {
  padding: 40px 0;
  border-top: 1px solid var(--border-color);
}

.features-title {
  font-size: 22px;
  font-weight: 700;
  letter-spacing: -0.02em;
  margin-bottom: 24px;
}

.feature-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 16px;
}

.feature-card {
  background-color: var(--surface-color);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 24px;
}

.feature-card h4 {
  font-size: 16px;
  font-weight: 700;
  margin-bottom: 8px;
  color: var(--text-main);
}

.feature-card p {
  font-size: 14px;
  color: var(--text-muted);
  line-height: 1.55;
}

/* App Specs / Metadata Table */
.specs-section {
  padding: 40px 0;
  border-top: 1px solid var(--border-color);
}

.specs-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 14px;
  background-color: var(--surface-color);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  overflow: hidden;
}

.specs-table th, 
.specs-table td {
  padding: 14px 18px;
  text-align: left;
  border-bottom: 1px solid var(--border-color);
}

.specs-table tr:last-child td {
  border-bottom: none;
}

.specs-table th {
  background-color: var(--border-subtle);
  color: var(--text-muted);
  font-weight: 600;
  width: 32%;
}

.specs-table td {
  color: var(--text-main);
  font-weight: 500;
}

/* Legal Documents (/privacy & /terms) */
.legal-content {
  padding: 48px 0 64px 0;
}

.legal-header {
  margin-bottom: 36px;
  padding-bottom: 20px;
  border-bottom: 1px solid var(--border-color);
}

.legal-header h1 {
  font-size: 32px;
  font-weight: 800;
  margin-bottom: 8px;
}

.legal-header .meta-date {
  font-size: 14px;
  color: var(--text-light);
}

.legal-article h2 {
  font-size: 20px;
  font-weight: 700;
  margin-top: 32px;
  margin-bottom: 12px;
  color: var(--text-main);
}

.legal-article h3 {
  font-size: 16px;
  font-weight: 600;
  margin-top: 20px;
  margin-bottom: 8px;
  color: var(--text-main);
}

.legal-article p {
  font-size: 15px;
  color: var(--text-muted);
  line-height: 1.7;
  margin-bottom: 14px;
}

.legal-article ul {
  margin: 12px 0 18px 24px;
  color: var(--text-muted);
  font-size: 15px;
  line-height: 1.7;
}

.legal-article li {
  margin-bottom: 6px;
}

.legal-article strong {
  color: var(--text-main);
}

/* Footer */
.footer {
  border-top: 1px solid var(--border-color);
  background-color: var(--surface-color);
  padding: 36px 0;
  font-size: 14px;
  color: var(--text-muted);
}

.footer-content {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 16px;
}

.footer-links {
  display: flex;
  gap: 20px;
  list-style: none;
}

.footer-links a {
  text-decoration: none;
  color: var(--text-muted);
}

.footer-links a:hover {
  color: var(--text-main);
  text-decoration: underline;
}

/* Responsive */
@media (max-width: 640px) {
  h1 {
    font-size: 28px;
  }
  .hero p {
    font-size: 17px;
  }
  .nav-links {
    gap: 14px;
  }
  .specs-table th {
    width: 40%;
  }
}