:root {
  --bg-primary: #090d16;
  --bg-secondary: #111827;
  --bg-card: #151e31;
  --bg-card-hover: #1b263e;
  --border-color: rgba(255, 255, 255, 0.09);
  --border-highlight: rgba(16, 185, 129, 0.45);
  --text-primary: #f8fafc;
  --text-secondary: #94a3b8;
  --text-muted: #64748b;
  --accent-emerald: #10b981;
  --accent-emerald-dark: #059669;
  --accent-emerald-glow: rgba(16, 185, 129, 0.16);
  --accent-indigo: #6366f1;
  --accent-indigo-glow: rgba(99, 102, 241, 0.18);
  --accent-amber: #f59e0b;
  --accent-rose: #f43f5e;
  --radius-lg: 16px;
  --radius-md: 12px;
  --radius-sm: 8px;
  --shadow-lg: 0 20px 45px -15px rgba(0, 0, 0, 0.65);
}

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  background-color: var(--bg-primary);
  background-image: 
    radial-gradient(at 15% 5%, rgba(16, 185, 129, 0.10) 0px, transparent 45%),
    radial-gradient(at 85% 10%, rgba(99, 102, 241, 0.10) 0px, transparent 45%);
  color: var(--text-primary);
  line-height: 1.6;
  min-height: 100vh;
}

.container {
  max-width: 1220px;
  margin: 0 auto;
  padding: 0 1.25rem;
}

/* Header & Navigation */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(9, 13, 22, 0.85);
  backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--border-color);
}

.nav-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 70px;
  gap: 1rem;
}

.brand-logo {
  display: flex;
  align-items: center;
  gap: 0.65rem;
  text-decoration: none;
  color: var(--text-primary);
  font-weight: 800;
  font-size: 1.25rem;
  letter-spacing: -0.02em;
}

.logo-icon {
  width: 36px;
  height: 36px;
  border-radius: 10px;
  background: linear-gradient(135deg, var(--accent-emerald), var(--accent-indigo));
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 900;
  font-size: 1.1rem;
  color: #fff;
  box-shadow: 0 4px 15px rgba(16, 185, 129, 0.35);
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 1.5rem;
  list-style: none;
}

.nav-links a {
  color: var(--text-secondary);
  text-decoration: none;
  font-size: 0.92rem;
  font-weight: 500;
  transition: color 0.2s;
}

.nav-links a:hover {
  color: var(--text-primary);
}

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

/* Hero Section */
.hero {
  padding: 3.5rem 0 2.25rem;
  text-align: center;
}

.trust-pill {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.38rem 0.95rem;
  border-radius: 999px;
  background: var(--accent-emerald-glow);
  border: 1px solid var(--border-highlight);
  color: #34d399;
  font-size: 0.82rem;
  font-weight: 600;
  margin-bottom: 1.25rem;
}

.hero h1 {
  font-size: clamp(2rem, 4.5vw, 3.25rem);
  font-weight: 800;
  letter-spacing: -0.03em;
  line-height: 1.15;
  max-width: 880px;
  margin: 0 auto 1rem;
}

.gradient-text {
  background: linear-gradient(135deg, #34d399 0%, #60a5fa 55%, #a78bfa 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.hero p {
  color: var(--text-secondary);
  font-size: 1.1rem;
  max-width: 690px;
  margin: 0 auto 2rem;
}

/* Tool Switcher Tabs */
.tool-tabs {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 0.65rem;
  margin-bottom: 2.25rem;
}

.tab-btn {
  display: inline-flex;
  align-items: center;
  gap: 0.55rem;
  padding: 0.8rem 1.25rem;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  color: var(--text-secondary);
  font-size: 0.94rem;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.2s ease;
}

.tab-btn:hover {
  background: var(--bg-card-hover);
  color: var(--text-primary);
  border-color: rgba(255, 255, 255, 0.2);
}

.tab-btn.active {
  background: linear-gradient(135deg, rgba(16, 185, 129, 0.18), rgba(99, 102, 241, 0.18));
  border-color: var(--accent-emerald);
  color: var(--text-primary);
  box-shadow: 0 6px 20px rgba(16, 185, 129, 0.18);
}

.tab-badge {
  font-size: 0.7rem;
  padding: 0.12rem 0.45rem;
  border-radius: 99px;
  background: rgba(16, 185, 129, 0.2);
  color: #34d399;
  font-weight: 700;
}

/* Panels */
.tool-panel {
  display: none;
  animation: fadeIn 0.25s ease;
}

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

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(6px); }
  to { opacity: 1; transform: translateY(0); }
}

/* Grid Layout for Calculators */
.calc-grid {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 1.75rem;
  align-items: start;
}

@media (max-width: 960px) {
  .calc-grid {
    grid-template-columns: 1fr;
  }
  .nav-links {
    display: none;
  }
}

.card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 1.75rem;
  box-shadow: var(--shadow-lg);
}

.card-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 1.35rem;
  padding-bottom: 1rem;
  border-bottom: 1px solid var(--border-color);
}

.card-title {
  font-size: 1.2rem;
  font-weight: 700;
  color: var(--text-primary);
}

.card-subtitle {
  font-size: 0.86rem;
  color: var(--text-secondary);
  margin-top: 0.2rem;
}

/* Form Controls & Sliders */
.control-group {
  margin-bottom: 1.35rem;
}

.control-label {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 0.92rem;
  font-weight: 600;
  margin-bottom: 0.55rem;
}

.control-value {
  color: #34d399;
  font-weight: 700;
  font-family: 'JetBrains Mono', monospace;
  background: rgba(16, 185, 129, 0.12);
  padding: 0.18rem 0.6rem;
  border-radius: 6px;
}

input[type="range"] {
  width: 100%;
  accent-color: var(--accent-emerald);
  height: 6px;
  border-radius: 99px;
  background: #26334d;
  cursor: pointer;
}

.range-hints {
  display: flex;
  justify-content: space-between;
  font-size: 0.76rem;
  color: var(--text-muted);
  margin-top: 0.3rem;
}

/* Subscription Checkboxes */
.sub-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
  gap: 0.75rem;
  margin-bottom: 1.5rem;
}

.sub-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.8rem 0.95rem;
  border-radius: var(--radius-md);
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid var(--border-color);
  cursor: pointer;
  transition: all 0.18s ease;
  user-select: none;
}

.sub-item:hover {
  border-color: rgba(255, 255, 255, 0.22);
}

.sub-item.checked {
  background: rgba(16, 185, 129, 0.11);
  border-color: var(--accent-emerald);
}

.sub-item-left {
  display: flex;
  align-items: center;
  gap: 0.65rem;
}

.sub-item input[type="checkbox"] {
  accent-color: var(--accent-emerald);
  width: 17px;
  height: 17px;
}

.sub-name {
  font-size: 0.88rem;
  font-weight: 600;
}

.sub-price {
  font-size: 0.82rem;
  font-weight: 700;
  color: var(--text-secondary);
}

/* Results & Metrics Box */
.result-highlight {
  background: linear-gradient(145deg, rgba(16, 185, 129, 0.15), rgba(15, 23, 42, 0.9));
  border: 1px solid var(--border-highlight);
  border-radius: var(--radius-md);
  padding: 1.35rem;
  margin-bottom: 1.25rem;
  text-align: center;
}

.result-label {
  font-size: 0.84rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: #6ee7b7;
  font-weight: 700;
}

.result-big-number {
  font-size: 2.65rem;
  font-weight: 800;
  color: #fff;
  line-height: 1.15;
  margin: 0.35rem 0;
  letter-spacing: -0.03em;
}

.result-subtext {
  font-size: 0.88rem;
  color: var(--text-secondary);
}

.metrics-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.85rem;
  margin-bottom: 1.25rem;
}

.metric-box {
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 0.9rem 1rem;
}

.metric-box-label {
  font-size: 0.78rem;
  color: var(--text-secondary);
}

.metric-box-val {
  font-size: 1.3rem;
  font-weight: 700;
  margin-top: 0.2rem;
}

/* Recommendation Affiliate Cards */
.rec-card {
  background: linear-gradient(135deg, rgba(30, 41, 59, 0.9), rgba(15, 23, 42, 0.95));
  border: 1px solid rgba(99, 102, 241, 0.35);
  border-radius: var(--radius-md);
  padding: 1.15rem;
  margin-top: 0.9rem;
  transition: transform 0.2s ease, border-color 0.2s ease;
}

.rec-card:hover {
  transform: translateY(-2px);
  border-color: var(--accent-emerald);
}

.rec-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.5rem;
  margin-bottom: 0.45rem;
}

.rec-title {
  font-weight: 700;
  font-size: 1.02rem;
  color: #fff;
}

.rec-badge {
  font-size: 0.72rem;
  font-weight: 700;
  padding: 0.2rem 0.6rem;
  border-radius: 99px;
  background: rgba(16, 185, 129, 0.2);
  color: #34d399;
}

.rec-desc {
  font-size: 0.85rem;
  color: var(--text-secondary);
  margin-bottom: 0.85rem;
}

.rec-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.75rem;
  flex-wrap: wrap;
}

.rec-price {
  font-size: 0.8rem;
  color: #93c5fd;
  font-weight: 600;
}

/* Buttons */
.btn-primary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.45rem;
  background: linear-gradient(135deg, var(--accent-emerald), var(--accent-emerald-dark));
  color: #fff;
  font-weight: 700;
  font-size: 0.88rem;
  padding: 0.62rem 1.15rem;
  border-radius: var(--radius-sm);
  text-decoration: none;
  border: none;
  cursor: pointer;
  transition: all 0.2s ease;
  box-shadow: 0 4px 14px rgba(16, 185, 129, 0.3);
}

.btn-primary:hover {
  filter: brightness(1.08);
  transform: translateY(-1px);
}

.btn-secondary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.45rem;
  background: rgba(255, 255, 255, 0.06);
  color: var(--text-primary);
  font-weight: 600;
  font-size: 0.85rem;
  padding: 0.55rem 1rem;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border-color);
  text-decoration: none;
  cursor: pointer;
  transition: all 0.2s ease;
}

.btn-secondary:hover {
  background: rgba(255, 255, 255, 0.12);
}

/* Model Pricing Bars */
.model-bar-list {
  display: flex;
  flex-direction: column;
  gap: 0.8rem;
}

.model-bar-item {
  background: rgba(255, 255, 255, 0.025);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  padding: 0.75rem 0.95rem;
}

.model-bar-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 0.88rem;
  font-weight: 600;
  margin-bottom: 0.4rem;
}

.model-bar-track {
  width: 100%;
  height: 8px;
  background: rgba(255, 255, 255, 0.07);
  border-radius: 99px;
  overflow: hidden;
}

.model-bar-fill {
  height: 100%;
  background: linear-gradient(90deg, var(--accent-emerald), var(--accent-indigo));
  border-radius: 99px;
  transition: width 0.3s ease;
}

/* Partner Directory Table / Cards */
.section-block {
  margin-top: 4rem;
  margin-bottom: 3.5rem;
}

.section-header {
  text-align: center;
  max-width: 720px;
  margin: 0 auto 2.25rem;
}

.section-header h2 {
  font-size: 1.9rem;
  font-weight: 800;
  margin-bottom: 0.5rem;
}

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

.partner-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 1.4rem;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  transition: border-color 0.2s, transform 0.2s;
}

.partner-card:hover {
  border-color: var(--accent-emerald);
  transform: translateY(-3px);
}

/* FAQ Accordion */
.faq-list {
  max-width: 860px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 0.85rem;
}

.faq-item {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 1.15rem 1.35rem;
}

.faq-item summary {
  font-weight: 700;
  font-size: 1rem;
  cursor: pointer;
  list-style: none;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.faq-item summary::-webkit-details-marker {
  display: none;
}

.faq-item p {
  margin-top: 0.75rem;
  color: var(--text-secondary);
  font-size: 0.92rem;
}

/* Modal for Admin Affiliate Link Manager */
.modal-backdrop {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.78);
  backdrop-filter: blur(6px);
  z-index: 999;
  display: none;
  align-items: center;
  justify-content: center;
  padding: 1.25rem;
}

.modal-backdrop.open {
  display: flex;
}

.modal-content {
  background: var(--bg-secondary);
  border: 1px solid var(--border-highlight);
  border-radius: var(--radius-lg);
  max-width: 760px;
  width: 100%;
  max-height: 88vh;
  overflow-y: auto;
  padding: 1.75rem;
  box-shadow: var(--shadow-lg);
}

.input-field {
  width: 100%;
  padding: 0.65rem 0.85rem;
  background: var(--bg-primary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  color: var(--text-primary);
  font-size: 0.88rem;
  margin-top: 0.35rem;
}

.select-field {
  width: 100%;
  padding: 0.7rem 0.9rem;
  background: var(--bg-primary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  color: var(--text-primary);
  font-size: 0.92rem;
  margin-top: 0.35rem;
}

/* Footer */
.site-footer {
  border-top: 1px solid var(--border-color);
  padding: 2.5rem 0;
  margin-top: 4rem;
  color: var(--text-muted);
  font-size: 0.85rem;
}

.footer-inner {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  align-items: center;
  gap: 1rem;
}