/* ============================================
   InsightHub - Premium Dark Mode Stylesheet
   Modern affiliate marketing website
   ============================================ */

:root {
  --primary: #7C3AED;
  --primary-hover: #6D28D9;
  --accent: #22D3EE;
  --accent-hover: #06B6D4;
  --bg: #0B1020;
  --bg-secondary: #0F1525;
  --card: #161B2E;
  --card-hover: #1C2338;
  --text: #F1F5F9;
  --text-muted: #94A3B8;
  --text-secondary: #CBD5E1;
  --border: rgba(255, 255, 255, 0.08);
  --glass: rgba(22, 27, 46, 0.85);
  --glass-border: rgba(255, 255, 255, 0.1);
  --shadow: 0 8px 32px rgba(0, 0, 0, 0.4);
  --radius: 16px;
  --radius-sm: 10px;
  --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  --font: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --font-display: 'Inter', system-ui, sans-serif;
}

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

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

body {
  font-family: var(--font);
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
  overflow-x: hidden;
  min-height: 100vh;
}

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

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

a:hover {
  color: var(--accent-hover);
}

ul, ol {
  list-style: none;
}

button, .btn {
  cursor: pointer;
  border: none;
  font-family: inherit;
  transition: var(--transition);
}

/* ========== Typography ========== */
h1, h2, h3, h4, h5, h6 {
  font-weight: 700;
  line-height: 1.2;
  color: var(--text);
}

h1 { font-size: clamp(2rem, 5vw, 3.5rem); }
h2 { font-size: clamp(1.5rem, 3vw, 2.25rem); }
h3 { font-size: clamp(1.25rem, 2vw, 1.5rem); }
h4 { font-size: 1.125rem; }

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

.section {
  padding: 5rem 0;
}

.section-title {
  text-align: center;
  margin-bottom: 0.75rem;
}

.section-subtitle {
  text-align: center;
  color: var(--text-muted);
  max-width: 600px;
  margin: 0 auto 3rem;
  font-size: 1.1rem;
}

/* ========== Navigation ========== */
.navbar {
  position: sticky;
  top: 0;
  z-index: 1000;
  background: var(--glass);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--glass-border);
  padding: 0.875rem 0;
  width: 100%;
  transition: var(--transition);
}

.navbar.scrolled {
  box-shadow: 0 4px 30px rgba(0, 0, 0, 0.3);
}

.nav-container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 1.25rem;
}

.logo {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 1.5rem;
  font-weight: 800;
  color: var(--text);
  letter-spacing: -0.02em;
}

.logo span {
  background: linear-gradient(135deg, var(--primary), var(--accent));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.logo-icon {
  width: 36px;
  height: 36px;
  background: linear-gradient(135deg, var(--primary), var(--accent));
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.1rem;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 0.25rem;
}

.nav-links a {
  color: var(--text-secondary);
  padding: 0.5rem 0.875rem;
  border-radius: 8px;
  font-weight: 500;
  font-size: 0.95rem;
}

.nav-links a:hover,
.nav-links a.active {
  color: var(--text);
  background: rgba(124, 58, 237, 0.15);
}

.search-btn, .menu-toggle {
  background: transparent;
  color: var(--text);
  padding: 0.5rem;
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.search-btn:hover, .menu-toggle:hover {
  background: rgba(255, 255, 255, 0.08);
}

.menu-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  width: 28px;
  height: 28px;
}

.menu-toggle span {
  display: block;
  width: 100%;
  height: 2px;
  background: var(--text);
  border-radius: 2px;
  transition: var(--transition);
}

.menu-toggle.active span:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}

.menu-toggle.active span:nth-child(2) {
  opacity: 0;
}

.menu-toggle.active span:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

/* Mobile Nav */
.mobile-nav {
  display: none;
  position: fixed;
  top: 65px;
  left: 0;
  right: 0;
  background: var(--card);
  border-bottom: 1px solid var(--border);
  padding: 1rem;
  flex-direction: column;
  gap: 0.25rem;
  z-index: 1500;
  transform: translateY(-100%);
  opacity: 0;
  transition: var(--transition);
}

.mobile-nav.open {
  transform: translateY(0);
  opacity: 1;
  display: flex;
}

.mobile-nav a {
  color: var(--text-secondary);
  padding: 0.875rem 1rem;
  border-radius: 10px;
  font-weight: 500;
}

.mobile-nav a:hover {
  background: rgba(124, 58, 237, 0.15);
  color: var(--text);
}

/* Search Overlay */
.search-overlay {
  position: fixed;
  inset: 0;
  background: rgba(11, 16, 32, 0.95);
  backdrop-filter: blur(10px);
  z-index: 2000;
  display: flex;
  align-items: flex-start;
  justify-content: center;
  padding-top: 15vh;
  opacity: 0;
  visibility: hidden;
  transition: var(--transition);
}

.search-overlay.active {
  opacity: 1;
  visibility: visible;
}

.search-box {
  width: 90%;
  max-width: 600px;
  position: relative;
}

.search-box input {
  width: 100%;
  padding: 1.25rem 1.5rem 1.25rem 3.5rem;
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 16px;
  color: var(--text);
  font-size: 1.125rem;
  outline: none;
  transition: var(--transition);
}

.search-box input:focus {
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(124, 58, 237, 0.25);
}

.search-box .search-icon {
  position: absolute;
  left: 1.25rem;
  top: 50%;
  transform: translateY(-50%);
  color: var(--text-muted);
  font-size: 1.25rem;
}

.search-results {
  margin-top: 1rem;
  background: var(--card);
  border-radius: 16px;
  border: 1px solid var(--border);
  max-height: 400px;
  overflow-y: auto;
  display: none;
}

.search-results.active {
  display: block;
}

.search-result-item {
  padding: 1rem 1.25rem;
  border-bottom: 1px solid var(--border);
  cursor: pointer;
  transition: var(--transition);
}

.search-result-item:hover {
  background: rgba(124, 58, 237, 0.1);
}

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

.search-close {
  position: absolute;
  top: 1.5rem;
  right: 1.5rem;
  background: transparent;
  color: var(--text-muted);
  font-size: 1.5rem;
  padding: 0.5rem;
}

/* ========== Buttons ========== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.75rem 1.5rem;
  border-radius: 12px;
  font-weight: 600;
  font-size: 0.95rem;
  transition: var(--transition);
}

.btn-primary {
  background: linear-gradient(135deg, var(--primary), #8B5CF6);
  color: white;
  box-shadow: 0 4px 15px rgba(124, 58, 237, 0.4);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 25px rgba(124, 58, 237, 0.5);
  color: white;
}

.btn-accent {
  background: linear-gradient(135deg, var(--accent), #06B6D4);
  color: #0B1020;
  box-shadow: 0 4px 15px rgba(34, 211, 238, 0.3);
}

.btn-accent:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 25px rgba(34, 211, 238, 0.45);
  color: #0B1020;
}

.btn-outline {
  background: transparent;
  border: 1.5px solid var(--border);
  color: var(--text);
}

.btn-outline:hover {
  border-color: var(--primary);
  background: rgba(124, 58, 237, 0.1);
  color: var(--text);
}

.btn-sm {
  padding: 0.5rem 1rem;
  font-size: 0.875rem;
  border-radius: 8px;
}

.btn-glow:hover {
  box-shadow: 0 0 20px rgba(124, 58, 237, 0.6);
}

/* ========== Hero ========== */
.hero {
  position: relative;
  padding: 6rem 0 5rem;
  overflow: hidden;
}

.hero::before {
  content: '';
  position: absolute;
  top: -20%;
  left: 50%;
  transform: translateX(-50%);
  width: 800px;
  height: 600px;
  background: radial-gradient(ellipse, rgba(124, 58, 237, 0.25) 0%, transparent 70%);
  pointer-events: none;
}

.hero::after {
  content: '';
  position: absolute;
  bottom: 0;
  right: -10%;
  width: 500px;
  height: 400px;
  background: radial-gradient(ellipse, rgba(34, 211, 238, 0.12) 0%, transparent 70%);
  pointer-events: none;
}

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

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.4rem 1rem;
  background: rgba(124, 58, 237, 0.15);
  border: 1px solid rgba(124, 58, 237, 0.3);
  border-radius: 50px;
  font-size: 0.875rem;
  color: var(--accent);
  margin-bottom: 1.5rem;
}

.hero h1 {
  margin-bottom: 1.25rem;
}

.hero h1 .gradient {
  background: linear-gradient(135deg, var(--primary), var(--accent));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero p {
  font-size: 1.2rem;
  color: var(--text-muted);
  margin-bottom: 2rem;
}

.hero-actions {
  display: flex;
  gap: 1rem;
  justify-content: center;
  flex-wrap: wrap;
}

/* ========== Cards ========== */
.card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  transition: var(--transition);
}

.card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow);
  border-color: rgba(124, 58, 237, 0.3);
  background: var(--card-hover);
}

.card-img {
  width: 100%;
  aspect-ratio: 16/10;
  object-fit: cover;
  background: linear-gradient(135deg, #1a1f35, #252b42);
}

.card-body {
  padding: 1.5rem;
}

.card-category {
  display: inline-block;
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--accent);
  margin-bottom: 0.5rem;
}

.card-title {
  font-size: 1.15rem;
  margin-bottom: 0.5rem;
}

.card-title a {
  color: var(--text);
}

.card-title a:hover {
  color: var(--accent);
}

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

.card-meta {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.75rem;
}

.rating {
  display: flex;
  align-items: center;
  gap: 0.35rem;
  font-weight: 600;
  color: #FBBF24;
}

.rating .stars {
  color: #FBBF24;
  letter-spacing: -1px;
}

.price {
  font-weight: 700;
  color: var(--accent);
  font-size: 1.1rem;
}

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

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

.grid-2 {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1.5rem;
}

/* ========== Category Cards ========== */
.category-card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 2rem 1.5rem;
  text-align: center;
  transition: var(--transition);
  cursor: pointer;
}

.category-card:hover {
  transform: translateY(-4px);
  border-color: var(--primary);
  box-shadow: 0 8px 30px rgba(124, 58, 237, 0.2);
}

.category-icon {
  width: 56px;
  height: 56px;
  margin: 0 auto 1rem;
  background: linear-gradient(135deg, rgba(124, 58, 237, 0.2), rgba(34, 211, 238, 0.15));
  border-radius: 14px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
}

.category-card h3 {
  margin-bottom: 0.35rem;
  font-size: 1.1rem;
}

.category-card p {
  color: var(--text-muted);
  font-size: 0.875rem;
}

/* ========== Review Card ========== */
.review-card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  transition: var(--transition);
  display: flex;
  flex-direction: column;
}

.review-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow);
  border-color: rgba(124, 58, 237, 0.35);
}

.review-img-wrap {
  position: relative;
  aspect-ratio: 16/10;
  overflow: hidden;
  background: linear-gradient(135deg, #1a1f35, #252b42);
}

.review-img-wrap img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.review-badge {
  position: absolute;
  top: 1rem;
  left: 1rem;
  background: rgba(124, 58, 237, 0.9);
  color: white;
  padding: 0.3rem 0.75rem;
  border-radius: 6px;
  font-size: 0.75rem;
  font-weight: 600;
}

.review-body {
  padding: 1.5rem;
  flex: 1;
  display: flex;
  flex-direction: column;
}

.review-rating {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  margin-bottom: 0.75rem;
}

.review-rating .score {
  background: linear-gradient(135deg, var(--primary), var(--accent));
  color: white;
  font-weight: 700;
  padding: 0.25rem 0.6rem;
  border-radius: 6px;
  font-size: 0.9rem;
}

.review-title {
  font-size: 1.2rem;
  margin-bottom: 0.5rem;
}

.review-title a {
  color: var(--text);
}

.review-title a:hover {
  color: var(--accent);
}

.review-excerpt {
  color: var(--text-muted);
  font-size: 0.925rem;
  margin-bottom: 1rem;
  flex: 1;
}

.pros-cons {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.75rem;
  margin-bottom: 1rem;
  font-size: 0.85rem;
}

.pros h5, .cons h5 {
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  margin-bottom: 0.35rem;
}

.pros h5 { color: #34D399; }
.cons h5 { color: #F87171; }

.pros li, .cons li {
  padding-left: 1rem;
  position: relative;
  color: var(--text-secondary);
  margin-bottom: 0.2rem;
}

.pros li::before {
  content: '+';
  position: absolute;
  left: 0;
  color: #34D399;
  font-weight: 700;
}

.cons li::before {
  content: '−';
  position: absolute;
  left: 0;
  color: #F87171;
  font-weight: 700;
}

.verdict {
  background: rgba(124, 58, 237, 0.1);
  border-left: 3px solid var(--primary);
  padding: 0.75rem 1rem;
  border-radius: 0 8px 8px 0;
  font-size: 0.9rem;
  color: var(--text-secondary);
  margin-bottom: 1.25rem;
}

.review-actions {
  display: flex;
  gap: 0.75rem;
  flex-wrap: wrap;
}

.review-price {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--accent);
  margin-bottom: 0.75rem;
}

/* ========== Filters (Fixed white button issue) ========== */
.filters {
  display: flex;
  gap: 0.75rem;
  flex-wrap: wrap;
  margin-bottom: 2rem;
  justify-content: center;
}

.filter-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.5rem 1.15rem;
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 50px;
  color: var(--text-secondary);
  font-weight: 500;
  font-size: 0.9rem;
  cursor: pointer;
  transition: var(--transition);
}

.filter-btn:hover,
.filter-btn.active {
  background: rgba(124, 58, 237, 0.2);
  border-color: var(--primary);
  color: var(--text);
}

/* ========== Newsletter & Forms ========== */
.newsletter {
  background: linear-gradient(135deg, rgba(124, 58, 237, 0.15), rgba(34, 211, 238, 0.08));
  border: 1px solid rgba(124, 58, 237, 0.25);
  border-radius: var(--radius);
  padding: 3rem 2rem;
  text-align: center;
}

.newsletter h2 {
  margin-bottom: 0.75rem;
}

.newsletter p {
  color: var(--text-muted);
  margin-bottom: 1.5rem;
  max-width: 500px;
  margin-left: auto;
  margin-right: auto;
}

.newsletter-form {
  display: flex;
  gap: 0.75rem;
  max-width: 480px;
  margin: 0 auto;
  flex-wrap: wrap;
  justify-content: center;
}

.newsletter-form input {
  flex: 1;
  min-width: 220px;
  padding: 0.875rem 1.25rem;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 12px;
  color: var(--text);
  font-size: 1rem;
  outline: none;
}

.newsletter-form input:focus {
  border-color: var(--primary);
}

/* ========== Footer ========== */
.footer {
  background: var(--bg-secondary);
  border-top: 1px solid var(--border);
  padding: 4rem 0 2rem;
  margin-top: 4rem;
}

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

.footer-brand .logo {
  margin-bottom: 1rem;
}

.footer-brand p {
  color: var(--text-muted);
  font-size: 0.925rem;
  max-width: 280px;
}

.footer-col h4 {
  font-size: 0.9rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--text-muted);
  margin-bottom: 1rem;
}

.footer-col a {
  display: block;
  color: var(--text-secondary);
  padding: 0.3rem 0;
  font-size: 0.925rem;
}

.footer-col a:hover {
  color: var(--accent);
}

.footer-bottom {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 1rem;
  padding-top: 2rem;
  border-top: 1px solid var(--border);
  color: var(--text-muted);
  font-size: 0.875rem;
}

.footer-social {
  display: flex;
  gap: 0.75rem;
}

.footer-social a {
  width: 36px;
  height: 36px;
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.05);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-secondary);
}

.footer-social a:hover {
  background: var(--primary);
  color: white;
}

/* ========== Animations ========== */
.fade-in {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

.fade-in.visible {
  opacity: 1;
  transform: translateY(0);
}

/* ========== Responsive ========== */
@media (max-width: 992px) {
  .grid-3 { grid-template-columns: repeat(2, 1fr); }
  .grid-4 { grid-template-columns: repeat(2, 1fr); }
  .footer-grid { grid-template-columns: 1fr 1fr; }
  .pros-cons { grid-template-columns: 1fr; }
}

@media (max-width: 768px) {
  .nav-links { display: none; }
  .menu-toggle { display: flex; }
  .grid-3, .grid-2 { grid-template-columns: 1fr; }
  .grid-4 { grid-template-columns: 1fr 1fr; }
  .footer-grid { grid-template-columns: 1fr; }
  .hero { padding: 4rem 0 3rem; }
  .section { padding: 3.5rem 0; }
  .newsletter-form { flex-direction: column; }
  .newsletter-form input { min-width: 100%; }
}

@media (max-width: 480px) {
  .grid-4 { grid-template-columns: 1fr; }
  .hero-actions { flex-direction: column; align-items: stretch; }
  .review-actions { flex-direction: column; }
  .btn { width: 100%; }
}