/* ============================================
   ProCalcTools.com - Main Stylesheet
   ============================================ */

:root {
  --primary: #1a6fb3;
  --primary-dark: #125490;
  --primary-light: #e8f2fb;
  --accent: #f59e0b;
  --text-dark: #1a202c;
  --text-mid: #4a5568;
  --text-light: #718096;
  --bg: #ffffff;
  --bg-alt: #f7fafc;
  --border: #e2e8f0;
  --success: #38a169;
  --radius: 8px;
  --shadow: 0 2px 12px rgba(0,0,0,0.08);
  --shadow-lg: 0 8px 32px rgba(0,0,0,0.12);
  --font-main: 'Source Sans 3', 'Segoe UI', sans-serif;
  --font-mono: 'JetBrains Mono', monospace;
  --max-width: 1200px;
  --transition: 0.2s ease;
}

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

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

body {
  font-family: var(--font-main);
  color: var(--text-dark);
  background: var(--bg);
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
}

a { color: var(--primary); text-decoration: none; transition: color var(--transition); }
a:hover { color: var(--primary-dark); }

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

/* ── Layout ── */
.container { max-width: var(--max-width); margin: 0 auto; padding: 0 20px; }
.section { padding: 60px 0; }
.section-alt { background: var(--bg-alt); }

/* ── Header ── */
header {
  background: var(--bg);
  border-bottom: 1px solid var(--border);
  position: sticky;
  top: 0;
  z-index: 100;
  box-shadow: 0 1px 6px rgba(0,0,0,0.06);
}

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

.logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 1.35rem;
  font-weight: 700;
  color: var(--primary);
  letter-spacing: -0.02em;
}

.logo svg { width: 32px; height: 32px; }
.logo span { color: var(--accent); }

nav { display: flex; align-items: center; gap: 4px; }

nav a {
  padding: 8px 14px;
  border-radius: var(--radius);
  font-size: 0.92rem;
  font-weight: 600;
  color: var(--text-mid);
  transition: all var(--transition);
}

nav a:hover, nav a.active {
  background: var(--primary-light);
  color: var(--primary);
}

.nav-cta {
  background: var(--primary) !important;
  color: #fff !important;
  padding: 8px 18px !important;
}
.nav-cta:hover { background: var(--primary-dark) !important; }

.hamburger {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  padding: 8px;
  flex-direction: column;
  gap: 5px;
}
.hamburger span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--text-dark);
  border-radius: 2px;
  transition: all var(--transition);
}

/* ── Hero ── */
.hero {
  background: linear-gradient(135deg, #e8f2fb 0%, #f0f7ff 50%, #fef9ec 100%);
  padding: 80px 0 60px;
  text-align: center;
}

.hero h1 {
  font-size: clamp(2rem, 5vw, 3.2rem);
  font-weight: 800;
  color: var(--text-dark);
  line-height: 1.2;
  margin-bottom: 16px;
  letter-spacing: -0.03em;
}

.hero h1 em { color: var(--primary); font-style: normal; }

.hero p {
  font-size: 1.15rem;
  color: var(--text-mid);
  max-width: 600px;
  margin: 0 auto 32px;
}

.hero-search {
  display: flex;
  max-width: 520px;
  margin: 0 auto;
  background: #fff;
  border: 2px solid var(--border);
  border-radius: 50px;
  overflow: hidden;
  box-shadow: var(--shadow);
  transition: border-color var(--transition);
}
.hero-search:focus-within { border-color: var(--primary); }

.hero-search input {
  flex: 1;
  border: none;
  outline: none;
  padding: 14px 20px;
  font-size: 1rem;
  font-family: var(--font-main);
  color: var(--text-dark);
}

.hero-search button {
  background: var(--primary);
  border: none;
  padding: 14px 24px;
  color: #fff;
  font-weight: 600;
  cursor: pointer;
  font-size: 0.95rem;
  transition: background var(--transition);
}
.hero-search button:hover { background: var(--primary-dark); }

.hero-stats {
  display: flex;
  justify-content: center;
  gap: 40px;
  margin-top: 40px;
  flex-wrap: wrap;
}

.stat { text-align: center; }
.stat strong { display: block; font-size: 1.8rem; font-weight: 800; color: var(--primary); }
.stat span { font-size: 0.85rem; color: var(--text-light); }

/* ── Category Cards ── */
.category-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 24px;
  margin-top: 40px;
}

.category-card {
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 28px;
  transition: all var(--transition);
  cursor: pointer;
  text-decoration: none;
  display: block;
}

.category-card:hover {
  box-shadow: var(--shadow-lg);
  transform: translateY(-3px);
  border-color: var(--primary);
}

.category-icon {
  width: 52px;
  height: 52px;
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 16px;
  font-size: 1.6rem;
}

.category-icon.finance { background: #dbeafe; }
.category-icon.health { background: #d1fae5; }
.category-icon.utility { background: #fef3c7; }

.category-card h3 { font-size: 1.2rem; font-weight: 700; margin-bottom: 8px; }
.category-card p { color: var(--text-mid); font-size: 0.92rem; margin-bottom: 16px; }

.tool-list { list-style: none; display: flex; flex-direction: column; gap: 6px; }
.tool-list li a {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.88rem;
  color: var(--text-mid);
  padding: 4px 0;
  transition: color var(--transition);
}
.tool-list li a:hover { color: var(--primary); }
.tool-list li a::before { content: '→'; color: var(--primary); font-size: 0.8rem; }

/* ── Tool Grid ── */
.tools-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
  gap: 16px;
  margin-top: 32px;
}

.tool-card {
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 20px;
  transition: all var(--transition);
  text-decoration: none;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.tool-card:hover {
  border-color: var(--primary);
  box-shadow: var(--shadow);
  transform: translateY(-2px);
}

.tool-card-icon { font-size: 1.5rem; }
.tool-card h4 { font-size: 0.95rem; font-weight: 700; color: var(--text-dark); }
.tool-card p { font-size: 0.82rem; color: var(--text-light); line-height: 1.4; }

/* ── Calculator Widget ── */
.calc-wrapper {
  display: grid;
  grid-template-columns: 1fr 380px;
  gap: 40px;
  align-items: start;
  margin-top: 32px;
}

.calc-box {
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 32px;
  box-shadow: var(--shadow);
}

.calc-box h2 { font-size: 1.3rem; margin-bottom: 24px; color: var(--text-dark); }

.form-group { margin-bottom: 20px; }
.form-group label {
  display: block;
  font-size: 0.88rem;
  font-weight: 600;
  color: var(--text-mid);
  margin-bottom: 6px;
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

.form-group input, .form-group select {
  width: 100%;
  padding: 11px 14px;
  border: 1.5px solid var(--border);
  border-radius: var(--radius);
  font-size: 1rem;
  font-family: var(--font-main);
  color: var(--text-dark);
  background: var(--bg);
  transition: border-color var(--transition);
  outline: none;
}

.form-group input:focus, .form-group select:focus {
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(26,111,179,0.1);
}

.input-prefix {
  position: relative;
}
.input-prefix span {
  position: absolute;
  left: 12px;
  top: 50%;
  transform: translateY(-50%);
  color: var(--text-light);
  font-weight: 600;
}
.input-prefix input { padding-left: 28px; }

.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 13px 28px;
  border: none;
  border-radius: var(--radius);
  font-size: 1rem;
  font-weight: 700;
  cursor: pointer;
  transition: all var(--transition);
  font-family: var(--font-main);
  letter-spacing: 0.01em;
}

.btn-primary {
  background: var(--primary);
  color: #fff;
  width: 100%;
}
.btn-primary:hover { background: var(--primary-dark); transform: translateY(-1px); box-shadow: 0 4px 12px rgba(26,111,179,0.3); }

.btn-secondary {
  background: var(--bg-alt);
  color: var(--text-mid);
  border: 1px solid var(--border);
  margin-top: 8px;
  width: 100%;
}
.btn-secondary:hover { background: var(--border); }

.results-box {
  background: var(--primary-light);
  border: 1px solid #bee3f8;
  border-radius: 12px;
  padding: 28px;
}

.results-box h3 {
  font-size: 1rem;
  font-weight: 700;
  color: var(--primary);
  text-transform: uppercase;
  letter-spacing: 0.06em;
  margin-bottom: 20px;
}

.result-item {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 12px 0;
  border-bottom: 1px solid #bee3f8;
}
.result-item:last-child { border-bottom: none; }
.result-item .label { font-size: 0.88rem; color: var(--text-mid); font-weight: 500; }
.result-item .value { font-size: 1.05rem; font-weight: 700; color: var(--text-dark); }
.result-item.highlight .value { font-size: 1.4rem; color: var(--primary); }

/* Amortization table */
.table-responsive { overflow-x: auto; margin-top: 24px; }
table { width: 100%; border-collapse: collapse; font-size: 0.88rem; }
thead th { background: var(--primary); color: #fff; padding: 10px 14px; text-align: left; white-space: nowrap; }
tbody tr:nth-child(even) { background: var(--bg-alt); }
tbody td { padding: 9px 14px; border-bottom: 1px solid var(--border); }

/* ── Breadcrumb ── */
.breadcrumb {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.85rem;
  color: var(--text-light);
  padding: 16px 0;
  flex-wrap: wrap;
}
.breadcrumb a { color: var(--text-light); }
.breadcrumb a:hover { color: var(--primary); }
.breadcrumb span { color: var(--text-light); }

/* ── Page Content ── */
.page-header {
  background: linear-gradient(135deg, var(--primary-light) 0%, #f0f7ff 100%);
  padding: 48px 0 36px;
}
.page-header h1 { font-size: clamp(1.6rem, 4vw, 2.6rem); font-weight: 800; letter-spacing: -0.02em; }
.page-header p { font-size: 1.05rem; color: var(--text-mid); margin-top: 10px; max-width: 640px; }

.content-body { max-width: 860px; }
.content-body h2 { font-size: 1.5rem; font-weight: 700; margin: 36px 0 14px; color: var(--text-dark); }
.content-body h3 { font-size: 1.15rem; font-weight: 700; margin: 28px 0 10px; }
.content-body p { margin-bottom: 16px; color: var(--text-mid); font-size: 0.97rem; }
.content-body ul, .content-body ol { margin: 12px 0 20px 24px; color: var(--text-mid); font-size: 0.97rem; }
.content-body li { margin-bottom: 6px; }

/* ── FAQ ── */
.faq { margin-top: 48px; }
.faq h2 { font-size: 1.6rem; font-weight: 800; margin-bottom: 24px; }

.faq-item {
  border: 1px solid var(--border);
  border-radius: var(--radius);
  margin-bottom: 12px;
  overflow: hidden;
}

.faq-q {
  width: 100%;
  background: none;
  border: none;
  padding: 18px 20px;
  text-align: left;
  font-size: 0.97rem;
  font-weight: 600;
  color: var(--text-dark);
  cursor: pointer;
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-family: var(--font-main);
  transition: background var(--transition);
}

.faq-q:hover { background: var(--bg-alt); }
.faq-q span { font-size: 1.2rem; color: var(--primary); transition: transform var(--transition); }
.faq-q.open span { transform: rotate(45deg); }

.faq-a {
  display: none;
  padding: 0 20px 18px;
  color: var(--text-mid);
  font-size: 0.93rem;
  line-height: 1.7;
}
.faq-a.open { display: block; }

/* ── Ad Zones ── */
.ad-zone {
  background: var(--bg-alt);
  border: 1.5px dashed var(--border);
  border-radius: var(--radius);
  padding: 20px;
  text-align: center;
  color: var(--text-light);
  font-size: 0.8rem;
  min-height: 90px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 24px 0;
}
.ad-zone.leaderboard { min-height: 90px; }
.ad-zone.sidebar { min-height: 250px; }
.ad-zone.rectangle { min-height: 250px; }

/* ── Blog ── */
.blog-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 24px;
  margin-top: 32px;
}

.blog-card {
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 12px;
  overflow: hidden;
  transition: all var(--transition);
  text-decoration: none;
  display: block;
  color: inherit;
}

.blog-card:hover { box-shadow: var(--shadow-lg); transform: translateY(-3px); }

.blog-card-img {
  height: 160px;
  background: linear-gradient(135deg, var(--primary-light), #dbeafe);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 3rem;
}

.blog-card-body { padding: 20px; }
.blog-card-tag {
  display: inline-block;
  background: var(--primary-light);
  color: var(--primary);
  font-size: 0.75rem;
  font-weight: 700;
  padding: 3px 10px;
  border-radius: 20px;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: 10px;
}
.blog-card h3 { font-size: 1.02rem; font-weight: 700; margin-bottom: 8px; line-height: 1.4; }
.blog-card p { font-size: 0.87rem; color: var(--text-light); margin-bottom: 12px; }
.blog-card-meta { font-size: 0.8rem; color: var(--text-light); }

/* ── Sidebar ── */
.sidebar-widget {
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 22px;
  margin-bottom: 20px;
}
.sidebar-widget h3 { font-size: 0.92rem; font-weight: 700; text-transform: uppercase; letter-spacing: 0.06em; color: var(--text-light); margin-bottom: 14px; }
.related-list { list-style: none; display: flex; flex-direction: column; gap: 8px; }
.related-list a { font-size: 0.9rem; color: var(--text-mid); display: flex; align-items: center; gap: 8px; }
.related-list a:hover { color: var(--primary); }
.related-list a::before { content: '📌'; font-size: 0.8rem; }

/* ── Footer ── */
footer {
  background: #1a202c;
  color: #a0aec0;
  padding: 60px 0 0;
  margin-top: 80px;
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 40px;
  padding-bottom: 40px;
}

.footer-brand .logo { color: #fff; margin-bottom: 12px; }
.footer-brand p { font-size: 0.88rem; line-height: 1.7; max-width: 280px; }

.footer-col h4 { color: #fff; font-size: 0.88rem; font-weight: 700; text-transform: uppercase; letter-spacing: 0.06em; margin-bottom: 16px; }
.footer-col ul { list-style: none; display: flex; flex-direction: column; gap: 8px; }
.footer-col ul a { font-size: 0.88rem; color: #a0aec0; transition: color var(--transition); }
.footer-col ul a:hover { color: #fff; }

.footer-bottom {
  border-top: 1px solid #2d3748;
  padding: 20px 0;
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 12px;
  font-size: 0.82rem;
}

.footer-bottom-links { display: flex; gap: 20px; }
.footer-bottom-links a { color: #a0aec0; }
.footer-bottom-links a:hover { color: #fff; }

/* ── Utility ── */
.section-title { text-align: center; margin-bottom: 12px; }
.section-title h2 { font-size: clamp(1.6rem, 3vw, 2.2rem); font-weight: 800; letter-spacing: -0.02em; }
.section-title p { color: var(--text-mid); margin-top: 8px; font-size: 0.97rem; }

.badge {
  display: inline-block;
  background: var(--primary-light);
  color: var(--primary);
  font-size: 0.78rem;
  font-weight: 700;
  padding: 4px 12px;
  border-radius: 20px;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  margin-bottom: 12px;
}

.features-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
  gap: 20px;
  margin-top: 32px;
}

.feature-item {
  display: flex;
  gap: 14px;
  align-items: flex-start;
}
.feature-icon { font-size: 1.6rem; flex-shrink: 0; }
.feature-item h4 { font-size: 0.95rem; font-weight: 700; margin-bottom: 4px; }
.feature-item p { font-size: 0.85rem; color: var(--text-light); }

/* ── Responsive ── */
@media (max-width: 1024px) {
  .calc-wrapper { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 768px) {
  nav { display: none; }
  nav.open { display: flex; flex-direction: column; position: absolute; top: 64px; left: 0; right: 0; background: var(--bg); border-bottom: 1px solid var(--border); padding: 16px; box-shadow: var(--shadow); }
  .hamburger { display: flex; }
  .hero { padding: 48px 0 40px; }
  .hero-stats { gap: 24px; }
  .form-row { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr; }
  .footer-bottom { flex-direction: column; text-align: center; }
  .section { padding: 40px 0; }
}

@media (max-width: 480px) {
  .tools-grid { grid-template-columns: 1fr 1fr; }
  .blog-grid { grid-template-columns: 1fr; }
}

/* ── Print ── */
@media print {
  header, footer, .ad-zone, nav { display: none; }
  .calc-wrapper { grid-template-columns: 1fr; }
}