/* ===== CalcWise - Custom Styles ===== */
:root {
  --primary: #1e3a5f;
  --primary-dark: #152a45;
  --accent: #f97316;
  --accent-hover: #ea580c;
  --bg: #f8fafc;
  --card: #ffffff;
  --text: #1e293b;
  --text-muted: #64748b;
  --border: #e2e8f0;
  --success: #16a34a;
}

* { box-sizing: border-box; }

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
  background: var(--bg);
  color: var(--text);
  margin: 0;
  line-height: 1.6;
}

/* Header */
.site-header {
  background: var(--card);
  border-bottom: 1px solid var(--border);
  position: sticky;
  top: 0;
  z-index: 100;
  box-shadow: 0 1px 3px rgba(0,0,0,0.05);
}
.header-inner {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 20px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 64px;
}
.logo {
  font-size: 1.4rem;
  font-weight: 800;
  color: var(--primary);
  text-decoration: none;
  display: flex;
  align-items: center;
  gap: 8px;
}
.logo-icon {
  width: 32px; height: 32px;
  background: var(--accent);
  border-radius: 8px;
  display: flex; align-items: center; justify-content: center;
  color: white; font-weight: 900; font-size: 1rem;
}
.nav-links { display: flex; gap: 24px; align-items: center; }
.nav-links a {
  color: var(--text);
  text-decoration: none;
  font-weight: 500;
  font-size: 0.95rem;
  transition: color 0.2s;
}
.nav-links a:hover { color: var(--accent); }
.nav-toggle {
  display: none;
  background: none; border: none;
  font-size: 1.5rem; cursor: pointer; color: var(--primary);
}

/* Hero */
.hero {
  background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
  color: white;
  padding: 60px 20px;
  text-align: center;
}
.hero h1 { font-size: 2.5rem; margin: 0 0 16px; font-weight: 800; }
.hero p { font-size: 1.15rem; opacity: 0.9; max-width: 600px; margin: 0 auto 32px; }
.hero-cta {
  display: inline-block;
  background: var(--accent);
  color: white;
  padding: 14px 36px;
  border-radius: 8px;
  text-decoration: none;
  font-weight: 700;
  font-size: 1.05rem;
  transition: background 0.2s;
}
.hero-cta:hover { background: var(--accent-hover); }

/* Container */
.container { max-width: 1200px; margin: 0 auto; padding: 40px 20px; }
.container-narrow { max-width: 800px; margin: 0 auto; padding: 40px 20px; }

/* Section titles */
.section-title {
  font-size: 1.8rem;
  font-weight: 800;
  color: var(--primary);
  margin: 0 0 8px;
}
.section-subtitle {
  color: var(--text-muted);
  margin: 0 0 32px;
  font-size: 1.05rem;
}

/* Tool cards grid */
.tool-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: 20px;
}
.tool-card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 24px;
  text-decoration: none;
  color: var(--text);
  transition: transform 0.2s, box-shadow 0.2s, border-color 0.2s;
  display: block;
}
.tool-card:hover {
  transform: translateY(-3px);
  box-shadow: 0 8px 24px rgba(0,0,0,0.08);
  border-color: var(--accent);
}
.tool-card-icon {
  width: 48px; height: 48px;
  background: #eff6ff;
  border-radius: 10px;
  display: flex; align-items: center; justify-content: center;
  font-size: 1.5rem;
  margin-bottom: 16px;
}
.tool-card h3 { margin: 0 0 8px; font-size: 1.15rem; color: var(--primary); }
.tool-card p { margin: 0; color: var(--text-muted); font-size: 0.9rem; }

/* Calculator layout */
.calc-wrapper {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 24px;
  margin-bottom: 32px;
}
.calc-panel {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 28px;
}
.calc-panel h2 {
  margin: 0 0 20px;
  font-size: 1.25rem;
  color: var(--primary);
  font-weight: 700;
}
.form-group { margin-bottom: 18px; }
.form-group label {
  display: block;
  font-weight: 600;
  font-size: 0.9rem;
  margin-bottom: 6px;
  color: var(--text);
}
.form-group input, .form-group select {
  width: 100%;
  padding: 10px 14px;
  border: 1px solid var(--border);
  border-radius: 8px;
  font-size: 1rem;
  transition: border-color 0.2s;
}
.form-group input:focus, .form-group select:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(249,115,22,0.15);
}
.input-hint { font-size: 0.8rem; color: var(--text-muted); margin-top: 4px; }

/* Result display */
.result-highlight {
  background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
  color: white;
  border-radius: 12px;
  padding: 24px;
  text-align: center;
  margin-bottom: 20px;
}
.result-highlight .label { font-size: 0.9rem; opacity: 0.85; margin-bottom: 4px; }
.result-highlight .value { font-size: 2.2rem; font-weight: 800; }
.result-row {
  display: flex;
  justify-content: space-between;
  padding: 10px 0;
  border-bottom: 1px solid var(--border);
  font-size: 0.95rem;
}
.result-row:last-child { border-bottom: none; }
.result-row .label { color: var(--text-muted); }
.result-row .value { font-weight: 700; }

/* Chart */
.chart-container { position: relative; height: 250px; margin-top: 16px; }

/* Amortization table */
.amort-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.85rem;
  margin-top: 16px;
}
.amort-table th, .amort-table td {
  padding: 8px 12px;
  text-align: right;
  border-bottom: 1px solid var(--border);
}
.amort-table th {
  background: var(--bg);
  font-weight: 700;
  color: var(--primary);
  position: sticky;
  top: 0;
}
.amort-table td:first-child, .amort-table th:first-child { text-align: left; }
.amort-scroll { max-height: 300px; overflow-y: auto; border: 1px solid var(--border); border-radius: 8px; }

/* Content article */
.article {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 40px;
}
.article h1 { font-size: 2rem; color: var(--primary); margin: 0 0 16px; }
.article h2 { font-size: 1.5rem; color: var(--primary); margin: 32px 0 12px; }
.article h3 { font-size: 1.2rem; color: var(--primary-dark); margin: 24px 0 10px; }
.article p { margin: 0 0 16px; }
.article ul, .article ol { margin: 0 0 16px; padding-left: 24px; }
.article li { margin-bottom: 8px; }
.article a { color: var(--accent); }
.article blockquote {
  border-left: 4px solid var(--accent);
  padding: 12px 20px;
  margin: 20px 0;
  background: #fff7ed;
  border-radius: 0 8px 8px 0;
  color: var(--text);
}
.article-meta {
  color: var(--text-muted);
  font-size: 0.9rem;
  margin-bottom: 24px;
  padding-bottom: 16px;
  border-bottom: 1px solid var(--border);
}

/* Blog list */
.blog-card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 24px;
  margin-bottom: 20px;
  transition: box-shadow 0.2s;
}
.blog-card:hover { box-shadow: 0 4px 16px rgba(0,0,0,0.06); }
.blog-card h3 { margin: 0 0 8px; }
.blog-card h3 a { color: var(--primary); text-decoration: none; }
.blog-card h3 a:hover { color: var(--accent); }
.blog-card .excerpt { color: var(--text-muted); margin: 0 0 12px; }
.blog-card .meta { font-size: 0.85rem; color: var(--text-muted); }

/* CTA banner */
.cta-banner {
  background: linear-gradient(135deg, var(--accent) 0%, var(--accent-hover) 100%);
  color: white;
  border-radius: 12px;
  padding: 32px;
  text-align: center;
  margin: 40px 0;
}
.cta-banner h3 { margin: 0 0 8px; font-size: 1.4rem; }
.cta-banner p { margin: 0 0 20px; opacity: 0.9; }
.cta-banner a {
  display: inline-block;
  background: white;
  color: var(--accent);
  padding: 12px 28px;
  border-radius: 8px;
  text-decoration: none;
  font-weight: 700;
}

/* Ad placeholder */
.ad-placeholder {
  background: #f1f5f9;
  border: 2px dashed #cbd5e1;
  border-radius: 8px;
  padding: 20px;
  text-align: center;
  color: var(--text-muted);
  font-size: 0.85rem;
  margin: 24px 0;
}
.ad-placeholder .ad-label {
  display: inline-block;
  background: #cbd5e1;
  color: #475569;
  padding: 2px 8px;
  border-radius: 4px;
  font-size: 0.75rem;
  font-weight: 700;
  margin-bottom: 8px;
}

/* Footer */
.site-footer {
  background: var(--primary-dark);
  color: #94a3b8;
  padding: 48px 20px 24px;
  margin-top: 60px;
}
.footer-inner {
  max-width: 1200px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 32px;
}
.footer-brand .logo { color: white; margin-bottom: 12px; }
.footer-brand p { font-size: 0.9rem; line-height: 1.6; }
.footer-col h4 { color: white; font-size: 1rem; margin: 0 0 16px; }
.footer-col ul { list-style: none; padding: 0; margin: 0; }
.footer-col li { margin-bottom: 8px; }
.footer-col a { color: #94a3b8; text-decoration: none; font-size: 0.9rem; }
.footer-col a:hover { color: var(--accent); }
.footer-bottom {
  max-width: 1200px;
  margin: 32px auto 0;
  padding-top: 24px;
  border-top: 1px solid rgba(255,255,255,0.1);
  text-align: center;
  font-size: 0.85rem;
}

/* Responsive */
@media (max-width: 768px) {
  .nav-links {
    display: none;
    position: absolute;
    top: 64px; left: 0; right: 0;
    background: var(--card);
    flex-direction: column;
    padding: 16px 20px;
    border-bottom: 1px solid var(--border);
    gap: 16px;
  }
  .nav-links.open { display: flex; }
  .nav-toggle { display: block; }
  .hero h1 { font-size: 1.8rem; }
  .calc-wrapper { grid-template-columns: 1fr; }
  .footer-inner { grid-template-columns: 1fr 1fr; }
  .article { padding: 24px; }
}
@media (max-width: 480px) {
  .footer-inner { grid-template-columns: 1fr; }
}