/* --- Global Reset & Typography --- */
@import url('https://fonts.googleapis.com/css2?family=Inter:ital,wght@0,400;0,500;0,600;0,700;1,400&family=JetBrains+Mono:wght@400;500&display=swap');

:root {
  --bg: #f9fafb;
  --card-bg: #ffffff;
  --primary: #111827;
  --accent: #2563eb;
  --accent-soft: #eff6ff;
  --text-primary: #1e293b;
  --text-secondary: #6b7280;
  --border: #e5e7eb;
  --success: #10b981;
  --warning: #f59e0b;
  --danger: #ef4444;
  --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.05);
  --shadow: 0 10px 15px -3px rgb(0 0 0 / 0.1), 0 4px 6px -4px rgb(0 0 0 / 0.1);
  --f-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --f-mono: 'JetBrains Mono', monospace;
  --radius: 12px;
  --nav-bg: #111827;
}

[data-theme='dark'] {
  --bg: #0f172a;
  --card-bg: #1e293b;
  --primary: #ffffff;
  --accent: #60a5fa;
  --accent-soft: rgba(96, 165, 250, 0.1);
  --text-primary: #f8fafc;
  --text-secondary: #94a3b8;
  --border: #334155;
  --nav-bg: #020617;
  --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.3);
  --shadow: 0 10px 15px -3px rgb(0 0 0 / 0.5), 0 4px 6px -4px rgb(0 0 0 / 0.5);
}

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

body {
  font-family: var(--f-sans);
  background-color: var(--bg);
  color: var(--text-primary);
  line-height: 1.6;
  padding-top: 72px;
  -webkit-font-smoothing: antialiased;
  transition: background-color 0.3s ease, color 0.3s ease;
}

.card, .tool-card, .results-section, .faq-item {
  transition: all 0.3s ease;
}

/* --- Navigation --- */
nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: 64px;
  background: var(--nav-bg);
  border-bottom: 1px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 1000;
  padding: 0 1.5rem;
}

.nav-container {
  max-width: 1280px;
  width: 100%;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.nav-logo {
  font-weight: 700;
  font-size: 1.125rem;
  color: white;
  text-decoration: none;
  letter-spacing: -0.02em;
}

.nav-links {
  display: flex;
  gap: 1.5rem;
}

.nav-links a {
  text-decoration: none;
  color: rgba(255, 255, 255, 0.7);
  padding: 8px 4px;
  font-size: 0.875rem;
  font-weight: 600;
  border-radius: 6px;
  transition: all 0.2s ease;
}

.nav-links a:hover {
  color: white;
}

.nav-links a.active {
  color: white;
  background: rgba(255, 255, 255, 0.15);
}

/* --- Theme Toggle --- */
.theme-toggle {
  background: rgba(255, 255, 255, 0.1);
  border: 1px solid rgba(255, 255, 255, 0.2);
  color: white;
  width: 40px;
  height: 40px;
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: all 0.2s ease;
  margin-left: 1rem;
}

.theme-toggle:hover {
  background: rgba(255, 255, 255, 0.2);
  transform: translateY(-1px);
}

.theme-toggle svg {
  width: 20px;
  height: 20px;
}

.sun-icon { display: none; }
.moon-icon { display: block; }

[data-theme='dark'] .sun-icon { display: block; }
[data-theme='dark'] .moon-icon { display: none; }

/* --- Responsive Nav for Tablet/Mobile -- */
@media (max-width: 768px) {
  nav {
    height: auto;
    padding: 0.75rem 1rem;
    position: static;
  }
  body { padding-top: 0; }
  .nav-container {
    flex-direction: column;
    gap: 0.75rem;
  }
  .nav-links {
    width: 100%;
    overflow-x: auto;
    padding-bottom: 0.25rem;
    white-space: nowrap;
    -webkit-overflow-scrolling: touch;
    display: flex;
    justify-content: center;
  }
}

/* --- Ad Slots --- */
.ad-slot {
  width: 100%;
  background: var(--accent-soft);
  border: 1px dashed var(--border);
  border-radius: 8px;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  position: relative;
  overflow: hidden;
  margin-left: auto;
  margin-right: auto;
  min-height: 50px;
}

.ad-slot::before {
  content: 'ADVERTISEMENT';
  position: absolute;
  top: 4px;
  left: 50%;
  transform: translateX(-50%);
  font-size: 9px;
  font-weight: 700;
  color: #94a3b8;
  letter-spacing: 0.05em;
  z-index: 10;
}

/* Billboard / Large Leaderboard */
.ad-top {
  width: 100%;
  max-width: 970px;
  min-height: 90px; /* Supporting 970x90 or 970x250 */
  margin-top: 1rem;
}

/* Half Page / Medium Rectangle */
.ad-sidebar {
  width: 300px;
  min-height: 250px; /* Supporting 300x250 or 300x600 */
  max-height: 600px;
  margin: 0.5rem auto;
}

/* Leaderboard */
.ad-bottom {
  grid-column: 1 / -1;
  width: 100%;
  max-width: 728px;
  min-height: 90px;
  margin: 2rem auto;
}

@media (max-width: 768px) {
  /* Mobile Large Banner (Better performance than 320x50) */
  .ad-top, .ad-bottom {
    max-width: 320px;
    height: 100px;
  }
  .ad-sidebar {
    width: 336px; /* Large Rectangle Mobile */
    max-width: 100%;
    height: 280px;
  }
}

/* --- Layout Grid --- */
.container {
  max-width: 1280px;
  margin: 1rem auto;
  padding: 0 1.5rem;
  display: grid;
  grid-template-columns: 320px 1fr 300px;
  align-items: start;
  gap: 1.25rem;
}

.grid-2 {
  display: contents; /* Allows children to be direct grid items of .container */
}

/* Header within Left Column */
header {
  grid-column: 1 / 2;
  margin-bottom: 1.5rem;
}

.content-section {
  grid-column: 1 / -1;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: 1.5rem;
  margin-top: 1rem;
}

@media (max-width: 1100px) {
  .container {
    grid-template-columns: 1fr 1fr;
  }
}

@media (max-width: 768px) {
  .container {
    grid-template-columns: 1fr;
    margin: 1rem auto;
    gap: 1.5rem;
  }
  .content-section {
    grid-template-columns: 1fr;
  }
}

/* --- Typography System --- */
h1 {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--primary);
  letter-spacing: -0.02em;
  margin-bottom: 0.5rem;
}

h2 {
  font-size: 1rem;
  font-weight: 600;
  color: var(--primary);
  margin-bottom: 0.75rem;
}

.description {
  color: var(--text-secondary);
  font-size: 0.9375rem;
  line-height: 1.6;
}

/* --- Card Architecture --- */
.card {
  background: var(--card-bg);
  border-radius: var(--radius);
  padding: 1.75rem;
  border: 1px solid var(--border);
  box-shadow: var(--shadow-sm);
  transition: box-shadow 0.3s ease;
}

.card:hover {
  box-shadow: var(--shadow);
}

/* --- Form Design --- */
.input-group {
  margin-bottom: 1.5rem;
}

.input-group:last-child {
  margin-bottom: 0;
}

label {
  display: block;
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--text-secondary);
  margin-bottom: 0.5rem;
}

input {
  width: 100%;
  padding: 0.75rem 1rem;
  border-radius: 8px;
  border: 1px solid var(--border);
  background: #fcfcfd;
  font-size: 1rem;
  color: var(--text-primary);
  font-family: var(--f-sans);
  transition: all 0.2s ease;
}

input:focus {
  outline: none;
  background: white;
  border-color: var(--accent);
  box-shadow: 0 0 0 4px rgba(37, 99, 235, 0.1);
}

/* --- Analysis Dashboard --- */
.results-section {
  display: flex !important;
  flex-direction: column;
  gap: 1.5rem;
}

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

.result-item {
  background: #f8fafc;
  padding: 1.25rem;
  border-radius: 10px;
  border: 1px solid var(--border);
}

.result-label {
  font-size: 0.75rem;
  color: var(--text-secondary);
  text-transform: uppercase;
  font-weight: 700;
  letter-spacing: 0.025em;
  margin-bottom: 0.25rem;
}

.result-value {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--primary);
  font-family: var(--f-sans);
}

/* --- Insight & Visuals --- */
.insight-box {
  background: var(--accent-soft);
  border: 1px solid #dbeafe;
  padding: 1.5rem;
  border-radius: 12px;
  margin-top: auto;
}

.insight-title {
  font-size: 0.75rem;
  font-weight: 700;
  color: var(--accent);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: 0.5rem;
}

.insight-text {
  font-size: 0.9375rem;
  line-height: 1.6;
  color: var(--text-primary);
}

.score-container {
  padding-top: 0.5rem;
}

.score-bar-container {
  height: 10px;
  background: var(--border);
  border-radius: 999px;
  margin: 0.75rem 0;
  overflow: hidden;
}

.progress-bar {
  height: 100%;
  transition: width 0.8s cubic-bezier(0.16, 1, 0.3, 1), background-color 0.4s;
}

.tag {
  padding: 4px 10px;
  border-radius: 6px;
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
}

/* --- Right Sidebar Specifics --- */
.seo-box p {
  font-size: 0.875rem;
  color: var(--text-secondary);
  line-height: 1.7;
}

.faq-box h2 {
  margin-bottom: 1.5rem;
  font-size: 1.25rem;
}

.faq-item {
  border-bottom: 1px solid var(--border);
  padding: 1rem 0;
}

.faq-item:last-child {
  border-bottom: none;
}

.faq-question {
  cursor: pointer;
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-weight: 600;
  font-size: 0.9375rem;
  color: var(--primary);
  transition: all 0.2s ease;
  user-select: none;
}

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

.faq-question::after {
  content: '+';
  font-size: 1.25rem;
  font-weight: 400;
  color: var(--text-secondary);
  transition: transform 0.3s ease, color 0.3s ease;
}

.faq-item.open .faq-question {
  color: var(--accent);
  margin-bottom: 0.75rem;
}

.faq-item.open .faq-question::after {
  content: '−';
  transform: rotate(180deg);
  color: var(--accent);
}

.faq-answer {
  max-height: 0;
  overflow: hidden;
  font-size: 0.875rem;
  color: var(--text-secondary);
  line-height: 1.6;
  transition: max-height 0.4s cubic-bezier(0.4, 0, 0.2, 1), opacity 0.4s ease;
  opacity: 0;
  pointer-events: none;
}

.faq-item.open .faq-answer {
  max-height: 500px; /* Increased for safety */
  opacity: 1;
  pointer-events: auto;
  padding-bottom: 0.5rem;
}

/* --- Action Links --- */
.related-tools {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.tool-link {
  display: block;
  text-decoration: none;
  background: white;
  border: 1px solid var(--border);
  padding: 0.875rem 1rem;
  border-radius: 8px;
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--text-primary);
  transition: all 0.2s ease;
  text-align: center;
}

.tool-link:hover {
  border-color: var(--accent);
  color: var(--accent);
  transform: translateY(-1px);
}

/* --- Landing Page Hero --- */
.hero {
  grid-column: 1 / -1;
  text-align: center;
  padding: 5rem 1rem 3rem;
  max-width: 850px;
  margin: 0 auto;
}

.hero h1 {
  font-size: 3.5rem;
  font-weight: 800;
  letter-spacing: -0.04em;
  color: var(--primary);
  margin-bottom: 1rem;
  line-height: 1.1;
}

.hero p {
  font-size: 1.25rem;
  color: var(--text-secondary);
  margin-bottom: 2.5rem;
  max-width: 600px;
  margin-left: auto;
  margin-right: auto;
}

.hero-cta {
  display: inline-flex;
  align-items: center;
  gap: 0.75rem;
  background: var(--accent);
  color: white;
  padding: 1rem 2rem;
  border-radius: 99px;
  text-decoration: none;
  font-weight: 700;
  font-size: 1.125rem;
  transition: all 0.2s ease;
  box-shadow: 0 4px 6px -1px rgba(37, 99, 235, 0.2);
}

.hero-cta:hover {
  transform: translateY(-2px);
  box-shadow: 0 10px 15px -3px rgba(37, 99, 235, 0.3);
  background: #1d4ed8;
}

.trust-line {
  margin-top: 1.5rem;
  font-size: 0.875rem;
  color: var(--text-secondary);
  font-weight: 500;
}

.social-proof {
  margin-top: 4rem;
  font-size: 0.875rem;
  color: var(--text-secondary);
  font-style: italic;
  opacity: 0.8;
}

/* --- Home Tool Grid --- */
.home-grid {
  grid-column: 1 / -1;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 2rem;
  margin-bottom: 5rem;
}

.tool-card {
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 2.5rem;
  text-decoration: none;
  transition: all 0.25s ease;
  display: flex;
  flex-direction: column;
  height: 100%;
}

.tool-card:hover {
  border-color: #d1d5db;
  box-shadow: var(--shadow);
  transform: translateY(-8px);
}

.tool-icon {
  width: 56px;
  height: 56px;
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 2rem;
  transition: transform 0.2s ease;
}

.tool-card:hover .tool-icon {
  transform: scale(1.1);
}

.icon-profit { background-color: #dbeafe; color: #1e40af; }
.icon-freelance { background-color: #f3e8ff; color: #6b21a8; }
.icon-tax { background-color: #ffedd5; color: #9a3412; }
.icon-roi { background-color: #dcfce7; color: #166534; }

.tool-card h3 {
  font-size: 1.5rem;
  font-weight: 800;
  color: var(--primary);
  margin-bottom: 1rem;
  letter-spacing: -0.02em;
}

.tool-card p {
  color: var(--text-secondary);
  font-size: 1rem;
  line-height: 1.6;
  margin-bottom: 2rem;
  flex-grow: 1;
}

.tool-cta {
  font-weight: 700;
  color: var(--accent);
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.9375rem;
  transition: gap 0.2s ease;
}

.tool-card:hover .tool-cta {
  gap: 0.75rem;
}

@media (max-width: 768px) {
  .hero {
    padding: 3rem 1rem;
  }
  .hero h1 {
    font-size: 2.25rem;
  }
  .hero p {
    font-size: 1rem;
  }
}

/* --- Footer --- */
footer {
  grid-column: 1 / -1;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  padding: 3rem 1.5rem;
  border-top: 1px solid var(--border);
  margin-top: 3rem;
  color: var(--text-secondary);
  font-size: 0.8125rem;
  text-align: center;
}

.footer-links {
  display: flex;
  justify-content: center;
  gap: 1.5rem;
  margin-bottom: 1rem;
}

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

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

/* --- Legal Content --- */
.legal-content {
  grid-column: 2;
  background: white;
  padding: 2.5rem;
  border-radius: 12px;
  border: 1px solid var(--border);
  line-height: 1.7;
}

.legal-content h1 {
  font-size: 2rem;
  margin-bottom: 1.5rem;
  color: var(--text-primary);
  font-weight: 700;
}

.legal-content h2 {
  font-size: 1.25rem;
  margin: 2rem 0 1rem;
  color: var(--text-primary);
  font-weight: 600;
}

.legal-content section {
  margin-bottom: 2.5rem;
}

.legal-content p {
  margin-bottom: 1.25rem;
  color: var(--text-primary);
}

.legal-content ul {
  margin-bottom: 1.5rem;
  padding-left: 1.5rem;
}

.legal-content li {
  margin-bottom: 0.75rem;
}

.legal-content a {
  color: var(--accent);
  text-decoration: none;
}

.legal-content a:hover {
  text-decoration: underline;
}

@media (max-width: 1024px) {
  .legal-content {
    grid-column: 1 / -1;
  }
}