/* ===================================================
   DropShipCalc Pro — Master Stylesheet
   High-Quality Dropshipping Calculator Website
   AdSense-Ready | Mobile-First | E-E-A-T Optimized
   =================================================== */

/* --- CSS Variables (Design Tokens) --- */
:root {
  --bg: #f8fafc;
  --bg2: #ffffff;
  --bg3: #f1f5f9;
  --ink: #0f172a;
  --ink2: #334155;
  --muted: #64748b;
  --rule: #e2e8f0;
  --accent: #2563eb;
  --accent-dark: #1d4ed8;
  --accent-light: #dbeafe;
  --accent2: #7c3aed;
  --success: #059669;
  --success-bg: #d1fae5;
  --warning: #d97706;
  --warning-bg: #fef3c7;
  --danger: #dc2626;
  --danger-bg: #fee2e2;
  --shadow-sm: 0 1px 3px rgba(0,0,0,0.08);
  --shadow-md: 0 4px 12px rgba(0,0,0,0.10);
  --shadow-lg: 0 10px 30px rgba(0,0,0,0.12);
  --radius-sm: 6px;
  --radius-md: 12px;
  --radius-lg: 16px;
  --max-w: 1200px;
  --header-h: 70px;
  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --font-mono: 'JetBrains Mono', 'Fira Code', 'Courier New', monospace;
  --transition: 0.2s ease;
}

/* --- Reset & Base --- */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

html {
  scroll-behavior: smooth;
  font-size: 16px;
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: var(--font-sans);
  background: var(--bg);
  color: var(--ink);
  line-height: 1.7;
  min-height: 100vh;
  -webkit-font-smoothing: antialiased;
}

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

img { max-width: 100%; height: auto; display: block; }
ul, ol { list-style: none; }

/* --- Typography Scale --- */
h1, h2, h3, h4, h5, h6 {
  font-weight: 700;
  line-height: 1.25;
  color: var(--ink);
  letter-spacing: -0.02em;
}
h1 { font-size: clamp(1.875rem, 4vw, 2.75rem); }
h2 { font-size: clamp(1.5rem, 3vw, 2rem); }
h3 { font-size: clamp(1.125rem, 2vw, 1.375rem); }
h4 { font-size: 1.1rem; }

p { color: var(--ink2); line-height: 1.8; }

/* --- Layout Utilities --- */
.container {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 0 1.5rem;
}

.section { padding: 4rem 0; }
.section-sm { padding: 2.5rem 0; }

/* --- Header --- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(255,255,255,0.95);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--rule);
  height: var(--header-h);
  display: flex;
  align-items: center;
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
  gap: 2rem;
}

.site-logo {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 1.25rem;
  font-weight: 800;
  color: var(--ink);
  text-decoration: none;
  white-space: nowrap;
  flex-shrink: 0;
}

.site-logo:hover { text-decoration: none; color: var(--ink); }

.logo-icon {
  width: 36px;
  height: 36px;
  background: var(--accent);
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  color: white;
  font-size: 1.1rem;
  font-weight: 900;
}

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

/* Nav */
.main-nav { display: flex; align-items: center; gap: 0.25rem; }
.nav-link {
  padding: 0.5rem 1rem;
  border-radius: var(--radius-sm);
  color: var(--ink2);
  font-weight: 500;
  font-size: 0.9rem;
  transition: all var(--transition);
  white-space: nowrap;
}
.nav-link:hover, .nav-link.active {
  background: var(--accent-light);
  color: var(--accent);
  text-decoration: none;
}

/* Mobile menu button */
.menu-toggle {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  padding: 0.5rem;
  border-radius: var(--radius-sm);
  color: var(--ink);
}

.menu-toggle svg { width: 24px; height: 24px; }

/* Mobile Nav */
@media (max-width: 768px) {
  .menu-toggle { display: flex; }
  .main-nav {
    display: none;
    position: fixed;
    top: var(--header-h);
    left: 0;
    right: 0;
    background: white;
    flex-direction: column;
    padding: 1rem;
    border-bottom: 1px solid var(--rule);
    box-shadow: var(--shadow-md);
    gap: 0.25rem;
    z-index: 99;
  }
  .main-nav.open { display: flex; }
  .nav-link { padding: 0.75rem 1rem; width: 100%; }
}

/* --- Hero Section --- */
.hero {
  background: linear-gradient(135deg, #0f172a 0%, #1e3a5f 50%, #0f172a 100%);
  color: white;
  padding: 5rem 0 6rem;
  position: relative;
  overflow: hidden;
}

.hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background: url("data:image/svg+xml,%3Csvg width='60' height='60' viewBox='0 0 60 60' xmlns='http://www.w3.org/2000/svg'%3E%3Cg fill='none' fill-rule='evenodd'%3E%3Cg fill='%23ffffff' fill-opacity='0.03'%3E%3Cpath d='M36 34v-4h-2v4h-4v2h4v4h2v-4h4v-2h-4zm0-30V0h-2v4h-4v2h4v4h2V6h4V4h-4zM6 34v-4H4v4H0v2h4v4h2v-4h4v-2H6zM6 4V0H4v4H0v2h4v4h2V6h4V4H6z'/%3E%3C/g%3E%3C/g%3E%3C/svg%3E");
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  background: rgba(37,99,235,0.3);
  border: 1px solid rgba(37,99,235,0.5);
  color: #93c5fd;
  font-size: 0.8rem;
  font-weight: 600;
  padding: 0.35rem 0.85rem;
  border-radius: 50px;
  margin-bottom: 1.5rem;
  letter-spacing: 0.05em;
  text-transform: uppercase;
}

.hero h1 {
  color: white;
  margin-bottom: 1.25rem;
  max-width: 700px;
}

.hero h1 em {
  font-style: normal;
  color: #60a5fa;
}

.hero-sub {
  font-size: clamp(1rem, 2vw, 1.2rem);
  color: #94a3b8;
  max-width: 580px;
  margin-bottom: 2.5rem;
  line-height: 1.7;
}

.hero-cta {
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
  margin-bottom: 3rem;
}

.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.8rem 1.75rem;
  border-radius: var(--radius-md);
  font-weight: 600;
  font-size: 0.95rem;
  cursor: pointer;
  transition: all var(--transition);
  border: none;
  text-decoration: none;
  white-space: nowrap;
}

.btn-primary {
  background: var(--accent);
  color: white;
  box-shadow: 0 4px 14px rgba(37,99,235,0.4);
}

.btn-primary:hover {
  background: var(--accent-dark);
  color: white;
  text-decoration: none;
  transform: translateY(-1px);
  box-shadow: 0 6px 20px rgba(37,99,235,0.5);
}

.btn-secondary {
  background: rgba(255,255,255,0.1);
  color: white;
  border: 1px solid rgba(255,255,255,0.2);
}

.btn-secondary:hover {
  background: rgba(255,255,255,0.2);
  color: white;
  text-decoration: none;
}

.btn-ghost {
  background: transparent;
  color: var(--ink2);
  border: 1px solid var(--rule);
}

.btn-ghost:hover {
  background: var(--bg3);
  color: var(--ink);
  text-decoration: none;
}

/* Hero Stats */
.hero-stats {
  display: flex;
  gap: 3rem;
  flex-wrap: wrap;
}

.hero-stat {
  display: flex;
  flex-direction: column;
  gap: 0.2rem;
}

.hero-stat-number {
  font-size: 1.75rem;
  font-weight: 800;
  color: white;
  letter-spacing: -0.03em;
}

.hero-stat-label {
  font-size: 0.8rem;
  color: #64748b;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  font-weight: 500;
}

/* --- Tool Grid (Homepage Cards) --- */
.tool-grid-section {
  background: var(--bg2);
  padding: 4rem 0;
}

.section-header {
  text-align: center;
  margin-bottom: 3rem;
}

.section-header p {
  max-width: 600px;
  margin: 0.75rem auto 0;
  color: var(--muted);
  font-size: 1.05rem;
}

.tool-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 1.25rem;
}

.tool-card {
  background: var(--bg2);
  border: 1px solid var(--rule);
  border-radius: var(--radius-lg);
  padding: 1.5rem;
  transition: all var(--transition);
  cursor: pointer;
  position: relative;
  overflow: hidden;
  text-decoration: none;
  display: block;
  color: inherit;
}

.tool-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--accent), var(--accent2));
  opacity: 0;
  transition: opacity var(--transition);
}

.tool-card:hover {
  border-color: var(--accent);
  box-shadow: var(--shadow-md);
  transform: translateY(-2px);
  text-decoration: none;
  color: inherit;
}

.tool-card:hover::before { opacity: 1; }

.tool-card-icon {
  width: 48px;
  height: 48px;
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.4rem;
  margin-bottom: 1rem;
  font-weight: 700;
}

.tool-card-icon.blue { background: #dbeafe; color: var(--accent); }
.tool-card-icon.purple { background: #ede9fe; color: var(--accent2); }
.tool-card-icon.green { background: #d1fae5; color: var(--success); }
.tool-card-icon.orange { background: #fef3c7; color: var(--warning); }
.tool-card-icon.red { background: #fee2e2; color: var(--danger); }
.tool-card-icon.teal { background: #ccfbf1; color: #0d9488; }
.tool-card-icon.pink { background: #fce7f3; color: #db2777; }
.tool-card-icon.indigo { background: #e0e7ff; color: #4338ca; }

.tool-card h3 {
  font-size: 1rem;
  font-weight: 700;
  margin-bottom: 0.4rem;
  color: var(--ink);
}

.tool-card p {
  font-size: 0.85rem;
  color: var(--muted);
  line-height: 1.5;
}

.tool-card-tag {
  display: inline-block;
  margin-top: 0.75rem;
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--accent);
  background: var(--accent-light);
  padding: 0.2rem 0.6rem;
  border-radius: 50px;
}

/* --- Calculator Tabs Section --- */
.calc-section {
  background: var(--bg3);
  padding: 4rem 0;
}

.calc-tabs {
  display: flex;
  gap: 0.5rem;
  flex-wrap: wrap;
  margin-bottom: 2.5rem;
  border-bottom: 2px solid var(--rule);
  padding-bottom: 0;
}

.calc-tab {
  padding: 0.6rem 1.1rem;
  border: none;
  background: none;
  cursor: pointer;
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--muted);
  border-bottom: 2px solid transparent;
  margin-bottom: -2px;
  transition: all var(--transition);
  border-radius: var(--radius-sm) var(--radius-sm) 0 0;
  white-space: nowrap;
}

.calc-tab:hover { color: var(--ink); background: var(--bg2); }
.calc-tab.active {
  color: var(--accent);
  border-bottom-color: var(--accent);
  background: var(--bg2);
}

/* Calculator Panel */
.calc-panel {
  display: none;
  background: var(--bg2);
  border-radius: var(--radius-lg);
  border: 1px solid var(--rule);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
}

.calc-panel.active { display: block; }

.calc-panel-header {
  background: var(--ink);
  color: white;
  padding: 1.75rem 2rem;
}

.calc-panel-header h2 {
  color: white;
  font-size: 1.5rem;
  margin-bottom: 0.4rem;
}

.calc-panel-header p {
  color: #94a3b8;
  font-size: 0.9rem;
  margin: 0;
}

.calc-panel-body {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0;
}

@media (max-width: 768px) {
  .calc-panel-body { grid-template-columns: 1fr; }
}

.calc-inputs-area {
  padding: 2rem;
  border-right: 1px solid var(--rule);
}

.calc-results-area {
  padding: 2rem;
  background: var(--bg);
}

@media (max-width: 768px) {
  .calc-inputs-area { border-right: none; border-bottom: 1px solid var(--rule); }
}

/* Input Groups */
.input-group {
  margin-bottom: 1.25rem;
}

.input-group label {
  display: block;
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--ink);
  margin-bottom: 0.4rem;
}

.input-group small {
  display: block;
  font-size: 0.75rem;
  color: var(--muted);
  margin-bottom: 0.4rem;
}

.input-wrapper {
  position: relative;
  display: flex;
  align-items: center;
}

.input-prefix {
  position: absolute;
  left: 0.875rem;
  color: var(--muted);
  font-weight: 600;
  font-size: 0.95rem;
  pointer-events: none;
}

.input-suffix {
  position: absolute;
  right: 0.875rem;
  color: var(--muted);
  font-weight: 600;
  font-size: 0.85rem;
  pointer-events: none;
}

.input-wrapper input,
.input-wrapper select {
  width: 100%;
  padding: 0.7rem 0.875rem;
  border: 1.5px solid var(--rule);
  border-radius: var(--radius-md);
  font-size: 0.95rem;
  font-family: var(--font-sans);
  color: var(--ink);
  background: white;
  transition: border-color var(--transition);
  appearance: none;
  -webkit-appearance: none;
}

.input-wrapper input:focus,
.input-wrapper select:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(37,99,235,0.1);
}

.input-wrapper input.has-prefix { padding-left: 2rem; }
.input-wrapper input.has-suffix { padding-right: 2.5rem; }

.input-error {
  font-size: 0.75rem;
  color: var(--danger);
  margin-top: 0.3rem;
  display: none;
}

.input-group.has-error .input-error { display: block; }
.input-group.has-error input { border-color: var(--danger); }

/* Range Slider */
.range-group { margin-bottom: 1.5rem; }

.range-group label {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--ink);
  margin-bottom: 0.5rem;
}

.range-group label span {
  font-size: 1rem;
  font-weight: 700;
  color: var(--accent);
  font-family: var(--font-mono);
}

input[type="range"] {
  width: 100%;
  height: 6px;
  border-radius: 3px;
  background: var(--rule);
  outline: none;
  -webkit-appearance: none;
  cursor: pointer;
}

input[type="range"]::-webkit-slider-thumb {
  -webkit-appearance: none;
  width: 20px;
  height: 20px;
  border-radius: 50%;
  background: var(--accent);
  cursor: pointer;
  border: 2px solid white;
  box-shadow: var(--shadow-sm);
}

input[type="range"]::-moz-range-thumb {
  width: 20px;
  height: 20px;
  border-radius: 50%;
  background: var(--accent);
  cursor: pointer;
  border: 2px solid white;
  box-shadow: var(--shadow-sm);
}

/* Results */
.results-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 1.5rem;
}

.results-header h3 {
  font-size: 0.85rem;
  font-weight: 700;
  color: var(--muted);
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

.result-card {
  background: var(--bg2);
  border: 1.5px solid var(--rule);
  border-radius: var(--radius-md);
  padding: 1.25rem;
  margin-bottom: 0.75rem;
  transition: all var(--transition);
}

.result-card.highlight {
  border-color: var(--accent);
  background: var(--accent-light);
}

.result-card-label {
  font-size: 0.8rem;
  color: var(--muted);
  font-weight: 500;
  margin-bottom: 0.25rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.result-card-value {
  font-size: 1.6rem;
  font-weight: 800;
  color: var(--ink);
  font-family: var(--font-mono);
  letter-spacing: -0.02em;
}

.result-card.highlight .result-card-value { color: var(--accent-dark); }

.result-card-sub {
  font-size: 0.8rem;
  color: var(--muted);
  margin-top: 0.2rem;
}

.result-breakdown {
  margin-top: 1rem;
  padding: 1rem;
  background: var(--bg);
  border-radius: var(--radius-md);
  border: 1px solid var(--rule);
}

.result-breakdown-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 0.35rem 0;
  font-size: 0.85rem;
  border-bottom: 1px solid var(--rule);
  color: var(--ink2);
}

.result-breakdown-row:last-child { border-bottom: none; }
.result-breakdown-row.total { font-weight: 700; color: var(--ink); font-size: 0.95rem; }
.result-breakdown-row .positive { color: var(--success); font-weight: 600; }
.result-breakdown-row .negative { color: var(--danger); font-weight: 600; }

/* Score Gauge */
.score-gauge {
  text-align: center;
  padding: 1.5rem;
}

.score-circle {
  width: 140px;
  height: 140px;
  border-radius: 50%;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  margin: 0 auto 1rem;
  font-family: var(--font-mono);
  font-weight: 800;
  font-size: 2rem;
  position: relative;
}

.score-circle::before {
  content: '';
  position: absolute;
  inset: -6px;
  border-radius: 50%;
  border: 4px solid;
  opacity: 0.3;
}

.score-circle.excellent { background: #d1fae5; color: #065f46; }
.score-circle.excellent::before { border-color: #059669; }
.score-circle.good { background: #fef3c7; color: #92400e; }
.score-circle.good::before { border-color: #d97706; }
.score-circle.poor { background: #fee2e2; color: #991b1b; }
.score-circle.poor::before { border-color: #dc2626; }

.score-label {
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin-top: 0.2rem;
}

/* Buttons */
.calc-actions {
  display: flex;
  gap: 0.75rem;
  margin-top: 1.5rem;
  flex-wrap: wrap;
}

.btn-sm {
  padding: 0.5rem 1.1rem;
  font-size: 0.85rem;
  border-radius: var(--radius-sm);
  font-weight: 600;
}

.btn-calc-reset {
  background: var(--bg3);
  color: var(--ink2);
  border: 1px solid var(--rule);
  cursor: pointer;
  font-family: var(--font-sans);
  transition: all var(--transition);
}

.btn-calc-reset:hover {
  background: var(--rule);
  color: var(--ink);
}

.btn-copy {
  background: var(--accent);
  color: white;
  border: none;
  cursor: pointer;
  font-family: var(--font-sans);
  transition: all var(--transition);
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  font-size: 0.85rem;
  font-weight: 600;
  padding: 0.5rem 1rem;
  border-radius: var(--radius-sm);
}

.btn-copy:hover { background: var(--accent-dark); }
.btn-copy.copied { background: var(--success); }

/* --- Content Section --- */
.content-section {
  background: var(--bg2);
  padding: 5rem 0;
}

.content-inner {
  display: grid;
  grid-template-columns: 1fr 340px;
  gap: 4rem;
  align-items: start;
}

@media (max-width: 900px) {
  .content-inner { grid-template-columns: 1fr; }
}

.content-main h2 {
  margin-bottom: 1.25rem;
  margin-top: 2.5rem;
}

.content-main h2:first-child { margin-top: 0; }

.content-main p {
  margin-bottom: 1.25rem;
  font-size: 1.02rem;
}

.content-main ul {
  list-style: none;
  margin: 1rem 0 1.5rem;
}

.content-main ul li {
  padding: 0.4rem 0;
  padding-left: 1.5rem;
  position: relative;
  color: var(--ink2);
  font-size: 1rem;
}

.content-main ul li::before {
  content: '';
  position: absolute;
  left: 0;
  top: 0.75rem;
  width: 8px;
  height: 8px;
  background: var(--accent);
  border-radius: 50%;
}

.content-main blockquote {
  border-left: 4px solid var(--accent);
  padding: 1.25rem 1.5rem;
  background: var(--accent-light);
  border-radius: 0 var(--radius-md) var(--radius-md) 0;
  margin: 1.5rem 0;
  font-style: italic;
  color: var(--ink2);
}

/* Content Sidebar */
.content-sidebar {
  position: sticky;
  top: calc(var(--header-h) + 1.5rem);
}

.sidebar-widget {
  background: var(--bg);
  border: 1px solid var(--rule);
  border-radius: var(--radius-lg);
  padding: 1.5rem;
  margin-bottom: 1.5rem;
}

.sidebar-widget h4 {
  font-size: 0.95rem;
  margin-bottom: 1rem;
  padding-bottom: 0.75rem;
  border-bottom: 2px solid var(--accent);
}

.sidebar-widget ul li {
  padding: 0.4rem 0;
  font-size: 0.9rem;
}

.sidebar-widget ul li a {
  color: var(--ink2);
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.sidebar-widget ul li a:hover {
  color: var(--accent);
  text-decoration: none;
}

.sidebar-widget ul li a::before {
  content: '→';
  color: var(--accent);
  font-weight: 700;
}

/* Quick Links Widget */
.quick-calc-list {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.quick-calc-link {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding: 0.75rem 1rem;
  background: var(--bg2);
  border: 1px solid var(--rule);
  border-radius: var(--radius-md);
  color: var(--ink2);
  font-size: 0.9rem;
  font-weight: 500;
  transition: all var(--transition);
  text-decoration: none;
}

.quick-calc-link:hover {
  background: var(--accent-light);
  border-color: var(--accent);
  color: var(--accent);
  text-decoration: none;
  transform: translateX(4px);
}

.quick-calc-icon {
  width: 32px;
  height: 32px;
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.9rem;
  flex-shrink: 0;
}

/* --- FAQ Section --- */
.faq-section {
  background: var(--bg3);
  padding: 4rem 0;
}

.faq-list { max-width: 760px; margin: 0 auto; }

.faq-item {
  background: var(--bg2);
  border: 1px solid var(--rule);
  border-radius: var(--radius-md);
  margin-bottom: 0.75rem;
  overflow: hidden;
  transition: all var(--transition);
}

.faq-item.open {
  border-color: var(--accent);
  box-shadow: var(--shadow-sm);
}

.faq-question {
  width: 100%;
  background: none;
  border: none;
  padding: 1.25rem 1.5rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  cursor: pointer;
  font-size: 1rem;
  font-weight: 600;
  color: var(--ink);
  text-align: left;
  font-family: var(--font-sans);
  gap: 1rem;
  transition: all var(--transition);
}

.faq-question:hover { color: var(--accent); }

.faq-icon {
  width: 28px;
  height: 28px;
  border-radius: 50%;
  background: var(--bg3);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  transition: all var(--transition);
  font-size: 1rem;
  font-weight: 700;
  color: var(--muted);
}

.faq-item.open .faq-icon {
  background: var(--accent);
  color: white;
  transform: rotate(45deg);
}

.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.3s ease;
}

.faq-item.open .faq-answer {
  max-height: 500px;
}

.faq-answer-inner {
  padding: 0 1.5rem 1.25rem;
  color: var(--ink2);
  font-size: 0.95rem;
  line-height: 1.8;
}

/* --- About Section --- */
.about-section {
  background: var(--bg2);
  padding: 5rem 0;
}

.about-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 4rem;
  align-items: center;
}

@media (max-width: 768px) {
  .about-grid { grid-template-columns: 1fr; gap: 2rem; }
}

.about-content h2 { margin-bottom: 1.25rem; }
.about-content p { margin-bottom: 1rem; }

.value-props {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.25rem;
  margin-top: 2rem;
}

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

.value-prop {
  background: var(--bg3);
  border-radius: var(--radius-md);
  padding: 1.25rem;
}

.value-prop-icon {
  width: 40px;
  height: 40px;
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.1rem;
  margin-bottom: 0.75rem;
}

.value-prop h4 { font-size: 0.95rem; margin-bottom: 0.35rem; }
.value-prop p { font-size: 0.85rem; margin: 0; color: var(--muted); }

.about-visual {
  background: linear-gradient(135deg, var(--accent), var(--accent2));
  border-radius: var(--radius-lg);
  padding: 3rem;
  color: white;
  text-align: center;
}

.about-visual-stat {
  font-size: 3.5rem;
  font-weight: 900;
  letter-spacing: -0.04em;
  line-height: 1;
  margin-bottom: 0.5rem;
}

.about-visual-label {
  font-size: 1rem;
  opacity: 0.85;
  margin-bottom: 2rem;
}

.about-visual-features {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  text-align: left;
  max-width: 280px;
  margin: 0 auto;
}

.about-visual-feature {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  font-size: 0.9rem;
  opacity: 0.9;
}

.about-visual-feature span:first-child {
  width: 24px;
  height: 24px;
  border-radius: 50%;
  background: rgba(255,255,255,0.2);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.75rem;
  flex-shrink: 0;
}

/* --- CTA Section --- */
.cta-section {
  background: linear-gradient(135deg, var(--ink) 0%, #1e3a5f 100%);
  padding: 5rem 0;
  text-align: center;
  color: white;
}

.cta-section h2 { color: white; margin-bottom: 1rem; }
.cta-section p {
  color: #94a3b8;
  max-width: 560px;
  margin: 0 auto 2rem;
  font-size: 1.05rem;
}

.cta-buttons {
  display: flex;
  gap: 1rem;
  justify-content: center;
  flex-wrap: wrap;
}

/* --- Footer --- */
.site-footer {
  background: var(--ink);
  color: #94a3b8;
  padding: 4rem 0 2rem;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.5fr 1fr 1fr 1fr;
  gap: 3rem;
  margin-bottom: 3rem;
}

@media (max-width: 900px) {
  .footer-grid { grid-template-columns: 1fr 1fr; }
}

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

.footer-brand .site-logo { color: white; margin-bottom: 1rem; }
.footer-brand p { font-size: 0.875rem; color: #64748b; line-height: 1.7; margin-top: 0.75rem; }

.footer-col h4 {
  color: white;
  font-size: 0.85rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin-bottom: 1.25rem;
}

.footer-col ul li { margin-bottom: 0.5rem; }

.footer-col ul li a {
  color: #64748b;
  font-size: 0.875rem;
  transition: color var(--transition);
}

.footer-col ul li a:hover { color: white; text-decoration: none; }

.footer-bottom {
  border-top: 1px solid #1e293b;
  padding-top: 2rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 1rem;
}

.footer-bottom p { font-size: 0.8rem; color: #475569; margin: 0; }

/* --- Comparison Table --- */
.comparison-table-wrap {
  overflow-x: auto;
  border-radius: var(--radius-md);
  border: 1px solid var(--rule);
}

.comparison-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.9rem;
}

.comparison-table th {
  background: var(--ink);
  color: white;
  padding: 0.875rem 1rem;
  text-align: left;
  font-weight: 600;
  font-size: 0.85rem;
}

.comparison-table td {
  padding: 0.75rem 1rem;
  border-bottom: 1px solid var(--rule);
  color: var(--ink2);
}

.comparison-table tr:nth-child(even) td { background: var(--bg); }
.comparison-table tr:last-child td { border-bottom: none; }
.comparison-table td:first-child { font-weight: 600; color: var(--ink); }

/* --- Methodology Box --- */
.methodology-box {
  background: var(--bg3);
  border: 1px solid var(--rule);
  border-left: 4px solid var(--accent);
  border-radius: 0 var(--radius-md) var(--radius-md) 0;
  padding: 1.25rem 1.5rem;
  margin: 1.5rem 0;
}

.methodology-box h4 {
  font-size: 0.9rem;
  color: var(--accent);
  margin-bottom: 0.5rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.methodology-box p { font-size: 0.9rem; margin: 0; }

.methodology-box code {
  background: white;
  padding: 0.15rem 0.4rem;
  border-radius: 4px;
  font-family: var(--font-mono);
  font-size: 0.85em;
  color: var(--accent2);
}

/* --- Alert Boxes --- */
.alert {
  padding: 1rem 1.25rem;
  border-radius: var(--radius-md);
  border: 1px solid;
  margin: 1.25rem 0;
  font-size: 0.9rem;
  display: flex;
  gap: 0.75rem;
  align-items: flex-start;
}

.alert-info {
  background: #eff6ff;
  border-color: #bfdbfe;
  color: #1e40af;
}

.alert-success {
  background: var(--success-bg);
  border-color: #6ee7b7;
  color: #065f46;
}

.alert-warning {
  background: var(--warning-bg);
  border-color: #fcd34d;
  color: #92400e;
}

.alert-danger {
  background: var(--danger-bg);
  border-color: #fca5a5;
  color: #991b1b;
}

/* --- Scroll to top --- */
.scroll-top {
  position: fixed;
  bottom: 2rem;
  right: 2rem;
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: var(--accent);
  color: white;
  border: none;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: var(--shadow-md);
  transition: all var(--transition);
  opacity: 0;
  pointer-events: none;
  z-index: 50;
}

.scroll-top.visible { opacity: 1; pointer-events: auto; }
.scroll-top:hover { background: var(--accent-dark); transform: translateY(-2px); }

/* --- Contact Form --- */
.form-group { margin-bottom: 1.25rem; }

.form-group label {
  display: block;
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--ink);
  margin-bottom: 0.4rem;
}

.form-group input,
.form-group textarea,
.form-group select {
  width: 100%;
  padding: 0.75rem 1rem;
  border: 1.5px solid var(--rule);
  border-radius: var(--radius-md);
  font-size: 0.95rem;
  font-family: var(--font-sans);
  color: var(--ink);
  background: white;
  transition: border-color var(--transition);
}

.form-group input:focus,
.form-group textarea:focus,
.form-group select:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(37,99,235,0.1);
}

.form-group textarea { resize: vertical; min-height: 120px; }

/* --- AdSense Placeholder (to be activated after approval) --- */
.ad-container {
  background: var(--bg3);
  border: 1px dashed var(--rule);
  border-radius: var(--radius-md);
  padding: 2rem;
  text-align: center;
  color: var(--muted);
  font-size: 0.85rem;
  margin: 2rem 0;
}

/* --- Schema Rich Results Notice --- */
.schema-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  font-size: 0.7rem;
  font-weight: 600;
  color: var(--success);
  background: var(--success-bg);
  padding: 0.2rem 0.6rem;
  border-radius: 50px;
  margin-left: 0.5rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

/* --- Animations --- */
@keyframes fadeInUp {
  from { opacity: 0; transform: translateY(20px); }
  to { opacity: 1; transform: translateY(0); }
}

.animate-in {
  animation: fadeInUp 0.5s ease forwards;
}

/* --- Print Styles --- */
@media print {
  .site-header, .scroll-top, .hero-cta, .calc-actions, .btn-copy { display: none !important; }
  .hero { background: white; color: black; padding: 1rem 0; }
  body { background: white; }
  .section { padding: 1.5rem 0; }
}

/* --- AdSense Ready Notice --- */
/* This class hides ad containers before AdSense is approved */
.ad-placeholder {
  background: repeating-linear-gradient(
    45deg,
    var(--bg3),
    var(--bg3) 10px,
    white 10px,
    white 20px
  );
  border: 2px dashed var(--rule);
  border-radius: var(--radius-md);
  min-height: 90px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--muted);
  font-size: 0.8rem;
  margin: 1.5rem 0;
}

/* --- Privacy/Legal Page Styles --- */
.legal-content {
  max-width: 760px;
  margin: 0 auto;
  background: var(--bg2);
  border-radius: var(--radius-lg);
  border: 1px solid var(--rule);
  padding: 3rem;
}

@media (max-width: 600px) {
  .legal-content { padding: 1.5rem; border-radius: var(--radius-md); }
}

.legal-content h2 {
  margin-top: 2.5rem;
  padding-top: 1.5rem;
  border-top: 1px solid var(--rule);
}

.legal-content h2:first-child { margin-top: 0; padding-top: 0; border-top: none; }

.legal-content p { margin-bottom: 1rem; }

.legal-content ul {
  list-style: disc;
  padding-left: 1.5rem;
  margin-bottom: 1rem;
}

.legal-content ul li { margin-bottom: 0.4rem; }

/* --- Last Updated Banner --- */
.last-updated {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  font-size: 0.8rem;
  color: var(--muted);
  background: var(--bg3);
  padding: 0.35rem 0.85rem;
  border-radius: 50px;
  margin-bottom: 1.5rem;
}

/* --- Comparison Selector --- */
.compare-toggle {
  display: flex;
  gap: 0.5rem;
  margin-bottom: 1.5rem;
}

.compare-btn {
  flex: 1;
  padding: 0.6rem 1rem;
  border: 1.5px solid var(--rule);
  background: white;
  border-radius: var(--radius-md);
  cursor: pointer;
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--muted);
  font-family: var(--font-sans);
  transition: all var(--transition);
}

.compare-btn.active {
  border-color: var(--accent);
  background: var(--accent-light);
  color: var(--accent);
}

/* --- Responsive Adjustments --- */
@media (max-width: 600px) {
  .hero { padding: 3rem 0 4rem; }
  .hero h1 { font-size: 1.75rem; }
  .hero-stats { gap: 2rem; }
  .section { padding: 2.5rem 0; }
  .calc-tabs { gap: 0.25rem; }
  .calc-tab { padding: 0.5rem 0.6rem; font-size: 0.8rem; }
  .calc-panel-header { padding: 1.25rem 1rem; }
  .calc-panel-body { }
  .calc-inputs-area,
  .calc-results-area { padding: 1.25rem; }
  .result-card-value { font-size: 1.3rem; }
  .footer-bottom { flex-direction: column; text-align: center; }
  .legal-content { padding: 1.5rem; }
  .hero-cta { flex-direction: column; }
  .hero-cta .btn { justify-content: center; }
}

/* --- Cookie Consent Banner --- */
.cookie-banner {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  background: var(--ink);
  color: white;
  padding: 1.25rem 1.5rem;
  display: none;
  z-index: 200;
  box-shadow: 0 -4px 20px rgba(0,0,0,0.2);
}

.cookie-banner.show { display: block; }

.cookie-banner-inner {
  max-width: var(--max-w);
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1.5rem;
  flex-wrap: wrap;
}

.cookie-banner p {
  color: #94a3b8;
  font-size: 0.875rem;
  margin: 0;
  flex: 1;
}

.cookie-banner p strong { color: white; }

.cookie-banner-actions { display: flex; gap: 0.75rem; flex-shrink: 0; }

.btn-cookie-accept {
  background: var(--accent);
  color: white;
  border: none;
  padding: 0.6rem 1.25rem;
  border-radius: var(--radius-sm);
  font-weight: 600;
  font-size: 0.875rem;
  cursor: pointer;
  font-family: var(--font-sans);
  transition: background var(--transition);
}

.btn-cookie-accept:hover { background: var(--accent-dark); }

.btn-cookie-decline {
  background: transparent;
  color: #94a3b8;
  border: 1px solid #334155;
  padding: 0.6rem 1.25rem;
  border-radius: var(--radius-sm);
  font-weight: 600;
  font-size: 0.875rem;
  cursor: pointer;
  font-family: var(--font-sans);
  transition: all var(--transition);
}

.btn-cookie-decline:hover { border-color: #64748b; color: white; }