/* ==========================================================================
   Clearver Tools — Professional SaaS Design System
   Brand Colors: Navy (#0A2540), Electric Blue (#0284C7), Mint/Green (#10B981)
   ========================================================================== */

:root {
  --primary-navy: #0a2540;
  --navy-dark: #07192c;
  --brand-blue: #0284c7;
  --brand-blue-hover: #0369a1;
  --brand-blue-light: #e0f2fe;
  --accent-green: #10b981;
  --accent-green-hover: #059669;
  --accent-green-light: #ecfdf5;
  --text-main: #1e293b;
  --text-muted: #64748b;
  --text-light: #94a3b8;
  --bg-main: #f8fafc;
  --bg-card: #ffffff;
  --border-color: #e2e8f0;
  --border-focus: #38bdf8;
  --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.05);
  --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.1), 0 2px 4px -2px rgb(0 0 0 / 0.1);
  --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.1), 0 4px 6px -4px rgb(0 0 0 / 0.1);
  --shadow-hover: 0 14px 20px -3px rgb(0 0 0 / 0.12);
  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 16px;
  --radius-full: 9999px;
  --font-sans: system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
  --font-mono: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
}

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

body {
  font-family: var(--font-sans);
  background-color: var(--bg-main);
  color: var(--text-main);
  line-height: 1.6;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  -webkit-font-smoothing: antialiased;
}

a {
  color: var(--brand-blue);
  text-decoration: none;
  transition: color 0.15s ease-in-out;
}
a:hover {
  color: var(--brand-blue-hover);
  text-decoration: underline;
}

/* Container */
.container {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 1.25rem;
}

/* ==========================================================================
   Header & Navigation
   ========================================================================== */
.site-header {
  background-color: #ffffff;
  border-bottom: 1px solid var(--border-color);
  position: sticky;
  top: 0;
  z-index: 50;
  box-shadow: var(--shadow-sm);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 72px;
}

.brand-link {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  text-decoration: none !important;
}

.brand-logo-img {
  height: 48px;
  width: auto;
  object-fit: contain;
}

.brand-text {
  display: flex;
  flex-direction: column;
}

.brand-name {
  font-size: 1.35rem;
  font-weight: 800;
  color: var(--primary-navy);
  letter-spacing: -0.02em;
  line-height: 1.1;
}
.brand-name span {
  color: var(--accent-green);
}

.brand-tagline-sub {
  font-size: 0.72rem;
  color: var(--text-muted);
  font-weight: 500;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

.nav-menu {
  display: flex;
  align-items: center;
  gap: 1.15rem;
  list-style: none;
}

.nav-link {
  color: var(--text-main);
  font-weight: 500;
  font-size: 0.95rem;
  padding: 0.5rem 0.25rem;
  position: relative;
  transition: color 0.15s ease;
}
.nav-link:hover, .nav-link.active {
  color: var(--brand-blue);
  text-decoration: none;
}
.nav-link.active::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  right: 0;
  height: 2px;
  background-color: var(--brand-blue);
  border-radius: var(--radius-full);
}

/* Navigation Dropdowns */
.nav-item-dropdown {
  position: relative;
}

.nav-dropdown-toggle {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  background: none;
  border: none;
  cursor: pointer;
  font-family: inherit;
  font-size: 0.95rem;
  font-weight: 500;
  color: var(--text-main);
  padding: 0.5rem 0.25rem;
  transition: color 0.15s ease;
}

.nav-dropdown-toggle:hover,
.nav-dropdown-toggle:focus,
.nav-item-dropdown:hover .nav-dropdown-toggle {
  color: var(--brand-blue);
}

.dropdown-chevron {
  transition: transform 0.2s ease;
}

.nav-item-dropdown:hover .dropdown-chevron,
.nav-item-dropdown.open .dropdown-chevron {
  transform: rotate(180deg);
}

.nav-dropdown-menu {
  position: absolute;
  top: 100%;
  left: 0;
  min-width: 320px;
  background: #ffffff;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  box-shadow: 0 14px 35px -5px rgba(10, 37, 64, 0.12), 0 8px 12px -6px rgba(10, 37, 64, 0.08);
  padding: 0.5rem 0;
  z-index: 1000;
  opacity: 0;
  visibility: hidden;
  transform: translateY(8px);
  transition: all 0.18s cubic-bezier(0.16, 1, 0.3, 1);
  pointer-events: none;
  list-style: none;
}

.nav-dropdown-menu::before {
  content: '';
  position: absolute;
  top: -12px;
  left: 0;
  right: 0;
  height: 12px;
}

.nav-item-dropdown:hover .nav-dropdown-menu,
.nav-item-dropdown:focus-within .nav-dropdown-menu,
.nav-item-dropdown.open .nav-dropdown-menu {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
  pointer-events: auto;
}

.nav-dropdown-item {
  margin: 0;
}

.nav-dropdown-link {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding: 0.55rem 1rem;
  color: var(--text-main);
  text-decoration: none !important;
  transition: background 0.12s ease;
}

.nav-dropdown-link:hover {
  background-color: var(--brand-blue-light);
}

.nav-dropdown-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 32px;
  height: 32px;
  border-radius: var(--radius-sm);
  background-color: #f1f5f9;
  color: var(--brand-blue);
  flex-shrink: 0;
  transition: background-color 0.12s ease, color 0.12s ease;
}

.nav-dropdown-link:hover .nav-dropdown-icon {
  background-color: var(--brand-blue);
  color: #ffffff;
}

.nav-dropdown-info {
  display: flex;
  flex-direction: column;
}

.nav-dropdown-title {
  font-size: 0.88rem;
  font-weight: 600;
  color: var(--primary-navy);
  line-height: 1.25;
}

.nav-dropdown-desc {
  font-size: 0.74rem;
  color: var(--text-muted);
  line-height: 1.2;
  margin-top: 2px;
}

.nav-dropdown-divider {
  height: 1px;
  background-color: var(--border-color);
  margin: 0.4rem 0;
}

.nav-dropdown-viewall {
  display: block;
  padding: 0.65rem 1rem;
  font-weight: 700;
  color: var(--brand-blue);
  font-size: 0.85rem;
  text-align: right;
  background-color: #f8fafc;
}

.nav-dropdown-viewall:hover {
  background-color: var(--brand-blue-light);
  text-decoration: underline !important;
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.search-toggle-btn {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  background: var(--bg-main);
  border: 1px solid var(--border-color);
  padding: 0.45rem 0.85rem;
  border-radius: var(--radius-full);
  font-size: 0.875rem;
  color: var(--text-muted);
  cursor: pointer;
  transition: all 0.15s ease;
}
.search-toggle-btn:hover {
  border-color: var(--brand-blue);
  color: var(--brand-blue);
  background: #ffffff;
}

.mobile-menu-btn {
  display: none;
  background: none;
  border: none;
  font-size: 1.5rem;
  color: var(--text-main);
  cursor: pointer;
  padding: 0.25rem;
}

/* ==========================================================================
   Hero Section
   ========================================================================== */
.hero {
  background: linear-gradient(135deg, #0a2540 0%, #0f365d 60%, #0284c7 100%);
  color: #ffffff;
  padding: 4.5rem 0 4rem;
  position: relative;
  overflow: hidden;
}

.hero::after {
  content: '';
  position: absolute;
  top: 0; right: 0; bottom: 0; left: 0;
  background: radial-gradient(circle at 85% 20%, rgba(16, 185, 129, 0.18) 0%, transparent 50%);
  pointer-events: none;
}

.hero-inner {
  text-align: center;
  max-width: 800px;
  margin: 0 auto;
  position: relative;
  z-index: 1;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  background: rgba(255, 255, 255, 0.12);
  backdrop-filter: blur(8px);
  border: 1px solid rgba(255, 255, 255, 0.2);
  padding: 0.35rem 0.95rem;
  border-radius: var(--radius-full);
  font-size: 0.825rem;
  font-weight: 600;
  letter-spacing: 0.03em;
  color: #a7f3d0;
  margin-bottom: 1.25rem;
}

.hero-title {
  font-size: 3rem;
  font-weight: 800;
  line-height: 1.15;
  letter-spacing: -0.03em;
  margin-bottom: 1.25rem;
}

.hero-subtitle {
  font-size: 1.18rem;
  color: #e2e8f0;
  line-height: 1.6;
  margin-bottom: 2.25rem;
}

.hero-search-box {
  background: #ffffff;
  border-radius: var(--radius-full);
  padding: 0.4rem 0.5rem 0.4rem 1.25rem;
  display: flex;
  align-items: center;
  box-shadow: 0 12px 25px -4px rgba(0, 0, 0, 0.3);
  max-width: 600px;
  margin: 0 auto;
}

.hero-search-input {
  border: none;
  outline: none;
  flex: 1;
  font-size: 1rem;
  color: var(--text-main);
  background: transparent;
}
.hero-search-input::placeholder {
  color: var(--text-light);
}

.hero-search-btn {
  background-color: var(--brand-blue);
  color: #ffffff;
  border: none;
  padding: 0.75rem 1.5rem;
  border-radius: var(--radius-full);
  font-weight: 600;
  cursor: pointer;
  transition: background 0.15s ease;
}
.hero-search-btn:hover {
  background-color: var(--brand-blue-hover);
}

/* ==========================================================================
   Sections & Cards
   ========================================================================== */
.section {
  padding: 4rem 0;
}
.section-alt {
  background-color: #ffffff;
}

.section-header {
  margin-bottom: 2.5rem;
  display: flex;
  justify-content: space-between;
  align-items: flex-end;
  flex-wrap: wrap;
  gap: 1rem;
}

.section-title {
  font-size: 1.85rem;
  font-weight: 700;
  color: var(--primary-navy);
  letter-spacing: -0.02em;
}

.section-desc {
  color: var(--text-muted);
  font-size: 1.05rem;
  margin-top: 0.35rem;
}

.section-link {
  font-weight: 600;
  font-size: 0.95rem;
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
}

/* Grid Layouts */
.grid-3 {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
  gap: 1.5rem;
}

.grid-4 {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: 1.25rem;
}

.card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 1.5rem;
  transition: transform 0.2s ease, box-shadow 0.2s ease, border-color 0.2s ease;
  display: flex;
  flex-direction: column;
}
.card:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-md);
  border-color: #cbd5e1;
}

.card-icon {
  width: 44px;
  height: 44px;
  background-color: var(--brand-blue-light);
  color: var(--brand-blue);
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.35rem;
  margin-bottom: 1rem;
}

.card-badge {
  font-size: 0.725rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--accent-green);
  margin-bottom: 0.4rem;
}

.card-title {
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--primary-navy);
  margin-bottom: 0.5rem;
  line-height: 1.3;
}
.card-title a {
  color: inherit;
  text-decoration: none;
}
.card-title a:hover {
  color: var(--brand-blue);
}

.card-text {
  color: var(--text-muted);
  font-size: 0.925rem;
  line-height: 1.55;
  margin-bottom: 1.25rem;
  flex: 1;
}

.card-action {
  font-weight: 600;
  font-size: 0.875rem;
  color: var(--brand-blue);
  display: inline-flex;
  align-items: center;
  gap: 0.25rem;
}

/* ==========================================================================
   Calculator Interactive Interface
   ========================================================================== */
.calc-wrapper {
  background: #ffffff;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
  padding: 2rem;
  margin-bottom: 2.5rem;
}

.calc-grid {
  display: grid;
  grid-template-columns: 1.2fr 1fr;
  gap: 2.5rem;
}

.form-group {
  margin-bottom: 1.25rem;
}

.form-label {
  display: block;
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--primary-navy);
  margin-bottom: 0.4rem;
}

.form-control {
  width: 100%;
  padding: 0.75rem 1rem;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  font-size: 1rem;
  color: var(--text-main);
  background: #ffffff;
  transition: border-color 0.15s ease, box-shadow 0.15s ease;
}
.form-control:focus {
  outline: none;
  border-color: var(--border-focus);
  box-shadow: 0 0 0 3px rgba(56, 189, 248, 0.2);
}

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

.btn-group {
  display: flex;
  gap: 0.75rem;
  margin-top: 1.5rem;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.75rem 1.5rem;
  border-radius: var(--radius-sm);
  font-weight: 600;
  font-size: 0.95rem;
  cursor: pointer;
  border: none;
  transition: all 0.15s ease;
  text-decoration: none !important;
}

.btn-primary {
  background-color: var(--brand-blue);
  color: #ffffff;
}
.btn-primary:hover {
  background-color: var(--brand-blue-hover);
  color: #ffffff;
}

.btn-secondary {
  background-color: #f1f5f9;
  color: var(--text-main);
  border: 1px solid var(--border-color);
}
.btn-secondary:hover {
  background-color: #e2e8f0;
}

.btn-accent {
  background-color: var(--accent-green);
  color: #ffffff;
}
.btn-accent:hover {
  background-color: var(--accent-green-hover);
}

.btn-sm {
  padding: 0.4rem 0.85rem;
  font-size: 0.85rem;
}

/* Results Box */
.result-box {
  background: linear-gradient(135deg, #f8fafc 0%, #f1f5f9 100%);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 1.75rem;
  display: flex;
  flex-direction: column;
  justify-content: center;
}

.result-header {
  font-size: 0.825rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--text-muted);
  margin-bottom: 0.5rem;
}

.result-main {
  font-size: 1.85rem;
  font-weight: 800;
  color: var(--primary-navy);
  line-height: 1.2;
  margin-bottom: 1.25rem;
  word-break: break-word;
}

.result-details-list {
  list-style: none;
  border-top: 1px solid var(--border-color);
  padding-top: 1rem;
}

.result-detail-item {
  display: flex;
  justify-content: space-between;
  padding: 0.35rem 0;
  font-size: 0.925rem;
}
.result-detail-item span:first-child {
  color: var(--text-muted);
}
.result-detail-item span:last-child {
  font-weight: 600;
  color: var(--primary-navy);
}

.result-copy-btn {
  margin-top: 1.25rem;
  align-self: flex-start;
}

.alert-error {
  background-color: #fef2f2;
  border: 1px solid #fecaca;
  color: #b91c1c;
  padding: 0.85rem 1.25rem;
  border-radius: var(--radius-sm);
  font-size: 0.925rem;
  margin-top: 1rem;
}

/* ==========================================================================
   Educational Content & Typography
   ========================================================================== */
.content-box {
  background: #ffffff;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 2.25rem;
  margin-bottom: 2rem;
  line-height: 1.75;
}

.content-box h2 {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--primary-navy);
  margin: 1.75rem 0 0.85rem;
}
.content-box h2:first-child {
  margin-top: 0;
}

.content-box h3 {
  font-size: 1.2rem;
  font-weight: 600;
  color: var(--primary-navy);
  margin: 1.35rem 0 0.65rem;
}

.content-box p {
  margin-bottom: 1.15rem;
  color: #334155;
}

.content-box ul, .content-box ol {
  margin: 0.75rem 0 1.25rem 1.5rem;
  color: #334155;
}
.content-box li {
  margin-bottom: 0.4rem;
}

.content-box blockquote {
  border-left: 4px solid var(--brand-blue);
  background: var(--brand-blue-light);
  padding: 1rem 1.25rem;
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  margin: 1.25rem 0;
  font-size: 1.05rem;
  color: var(--primary-navy);
}

.data-table {
  width: 100%;
  border-collapse: collapse;
  margin: 1.5rem 0;
  font-size: 0.925rem;
}
.data-table th, .data-table td {
  padding: 0.75rem 1rem;
  border: 1px solid var(--border-color);
  text-align: left;
}
.data-table th {
  background-color: #f1f5f9;
  font-weight: 600;
  color: var(--primary-navy);
}

.disclaimer-box {
  background: #fffbeb;
  border: 1px solid #fde68a;
  border-left: 4px solid #f59e0b;
  padding: 1rem 1.25rem;
  border-radius: var(--radius-sm);
  font-size: 0.875rem;
  color: #92400e;
  margin: 1.5rem 0;
}

.faq-item {
  border-bottom: 1px solid var(--border-color);
  padding: 1.25rem 0;
}
.faq-question {
  font-weight: 700;
  color: var(--primary-navy);
  font-size: 1.05rem;
  margin-bottom: 0.45rem;
}
.faq-answer {
  color: var(--text-muted);
  font-size: 0.95rem;
}

/* Breadcrumbs */
.breadcrumbs {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.85rem;
  color: var(--text-muted);
  margin: 1.5rem 0;
}
.breadcrumbs a {
  color: var(--text-muted);
}
.breadcrumbs a:hover {
  color: var(--brand-blue);
}
.breadcrumbs span.separator {
  color: var(--text-light);
}
.breadcrumbs span.current {
  color: var(--primary-navy);
  font-weight: 600;
}

/* ==========================================================================
   Ad Containers
   ========================================================================== */
.ad-slot-container {
  margin: 1.75rem auto;
  text-align: center;
  max-width: 100%;
  overflow: hidden;
  clear: both;
}
.ad-slot-label {
  font-size: 0.65rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--text-light);
  margin-bottom: 0.35rem;
}

/* ==========================================================================
   Cookie Banner
   ========================================================================== */
.cookie-banner {
  position: fixed;
  bottom: 1.5rem;
  left: 1.5rem;
  right: 1.5rem;
  max-width: 580px;
  background: #ffffff;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-lg);
  padding: 1.5rem;
  z-index: 999;
  display: none;
}
.cookie-banner.show {
  display: block;
}
.cookie-text {
  font-size: 0.875rem;
  color: var(--text-main);
  margin-bottom: 1rem;
}
.cookie-buttons {
  display: flex;
  gap: 0.5rem;
  flex-wrap: wrap;
}

/* ==========================================================================
   Footer
   ========================================================================== */
.site-footer {
  background-color: var(--primary-navy);
  color: #cbd5e1;
  padding: 4rem 0 2rem;
  margin-top: auto;
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 2.5rem;
  margin-bottom: 3rem;
}

.footer-brand-title {
  color: #ffffff;
  font-size: 1.35rem;
  font-weight: 800;
  margin-bottom: 0.75rem;
}
.footer-desc {
  font-size: 0.925rem;
  line-height: 1.6;
  color: #94a3b8;
  margin-bottom: 1.25rem;
  max-width: 320px;
}

.footer-heading {
  color: #ffffff;
  font-size: 0.95rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: 1.25rem;
}

.footer-links {
  list-style: none;
}
.footer-links li {
  margin-bottom: 0.65rem;
}
.footer-links a {
  color: #94a3b8;
  font-size: 0.9rem;
}
.footer-links a:hover {
  color: #ffffff;
  text-decoration: none;
}

.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  padding-top: 2rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 1rem;
  font-size: 0.85rem;
  color: #94a3b8;
}

/* ==========================================================================
   Responsive Adaptations
   ========================================================================== */
@media (max-width: 900px) {
  .hero-title {
    font-size: 2.25rem;
  }
  .calc-grid {
    grid-template-columns: 1fr;
  }
  .footer-grid {
    grid-template-columns: 1fr 1fr;
  }
}

@media (max-width: 768px) {
  .nav-menu {
    display: none;
  }
  .nav-item-dropdown {
    width: 100%;
  }
  .nav-dropdown-toggle {
    width: 100%;
    justify-content: space-between;
    padding: 0.65rem 0;
  }
  .nav-dropdown-menu {
    position: static;
    box-shadow: none;
    border: 1px solid var(--border-color);
    background: #f8fafc;
    border-radius: var(--radius-sm);
    margin: 0.35rem 0 0.75rem 0;
    padding: 0.25rem 0;
    display: none;
    min-width: 100%;
    opacity: 1;
    visibility: visible;
    transform: none;
    pointer-events: auto;
  }
  .nav-item-dropdown.open .nav-dropdown-menu {
    display: block;
  }
  .mobile-menu-btn {
    display: block;
  }
  .footer-grid {
    grid-template-columns: 1fr;
  }
  .hero-title {
    font-size: 1.95rem;
  }
  .form-row {
    grid-template-columns: 1fr;
  }
}