/* ============================================
   WebToolsPad.com — Main Frontend Stylesheet
   Premium Dark Theme with Glassmorphism
   ============================================ */

/* --- CSS Variables / Design Tokens --- */
:root {
  --bg-primary: #0a0a1a;
  --bg-secondary: #0f0f23;
  --bg-card: #151530;
  --bg-glass: rgba(21, 21, 48, 0.7);
  --border-color: rgba(108, 92, 231, 0.15);
  --border-hover: rgba(108, 92, 231, 0.4);
  --text-primary: #f0f0f5;
  --text-secondary: #a0a0b8;
  --text-muted: #6a6a80;
  --accent-primary: #6c5ce7;
  --accent-secondary: #a29bfe;
  --accent-teal: #00cec9;
  --accent-pink: #fd79a8;
  --accent-green: #00b894;
  --accent-orange: #fdcb6e;
  --gradient-primary: linear-gradient(135deg, #6c5ce7, #a29bfe);
  --gradient-teal: linear-gradient(135deg, #00cec9, #81ecec);
  --gradient-pink: linear-gradient(135deg, #e84393, #fd79a8);
  --shadow-card: 0 8px 32px rgba(0, 0, 0, 0.3);
  --shadow-hover: 0 16px 48px rgba(108, 92, 231, 0.2);
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 20px;
  --radius-xl: 24px;
  --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

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

html { scroll-behavior: smooth; }

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
  background: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.6;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}

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

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

.container { max-width: 1200px; margin: 0 auto; padding: 0 1.5rem; }

/* --- Navbar --- */
.navbar {
  position: fixed; top: 0; left: 0; right: 0; z-index: 1000;
  background: rgba(10, 10, 26, 0.85);
  backdrop-filter: blur(20px); -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--border-color);
  padding: 0 1.5rem; height: 70px;
  transition: var(--transition);
}
.navbar.scrolled { background: rgba(10, 10, 26, 0.95); box-shadow: 0 4px 30px rgba(0,0,0,0.4); }
.nav-container {
  max-width: 1200px; margin: 0 auto;
  display: flex; align-items: center; justify-content: space-between;
  height: 100%;
}
.nav-logo {
  display: flex; align-items: center; gap: 0.6rem;
  font-size: 1.4rem; font-weight: 800; color: var(--text-primary);
}
.nav-logo i {
  background: var(--gradient-primary);
  -webkit-background-clip: text; background-clip: text;
  -webkit-text-fill-color: transparent; font-size: 1.5rem;
}
.nav-links { display: flex; align-items: center; gap: 0.3rem; }
.nav-link {
  padding: 0.5rem 1rem; border-radius: var(--radius-sm);
  color: var(--text-secondary); font-size: 0.9rem; font-weight: 500;
  transition: var(--transition);
}
.nav-link:hover, .nav-link.active {
  color: var(--text-primary); background: rgba(108, 92, 231, 0.1);
}
.nav-link i { margin-right: 0.3rem; font-size: 0.85rem; }

.nav-toggle {
  display: none; flex-direction: column; gap: 5px; background: none;
  border: none; cursor: pointer; padding: 0.5rem;
}
.nav-toggle span {
  width: 24px; height: 2px; background: var(--text-primary);
  border-radius: 2px; transition: var(--transition);
}

/* --- Hero Section --- */
.hero {
  position: relative; padding: 10rem 0 5rem; text-align: center;
  overflow: hidden;
  background: radial-gradient(ellipse at 50% 0%, rgba(108,92,231,0.12) 0%, transparent 60%);
}
.hero-bg-effects { position: absolute; inset: 0; pointer-events: none; overflow: hidden; }
.hero-orb {
  position: absolute; border-radius: 50%;
  filter: blur(80px); opacity: 0.4; animation: orbFloat 8s ease-in-out infinite;
}
.hero-orb-1 { width: 400px; height: 400px; background: #6c5ce7; top: -100px; left: -100px; }
.hero-orb-2 { width: 300px; height: 300px; background: #00cec9; top: 50px; right: -50px; animation-delay: 2s; }
.hero-orb-3 { width: 250px; height: 250px; background: #fd79a8; bottom: -50px; left: 40%; animation-delay: 4s; }

@keyframes orbFloat {
  0%, 100% { transform: translate(0, 0) scale(1); }
  33% { transform: translate(30px, -20px) scale(1.05); }
  66% { transform: translate(-20px, 15px) scale(0.95); }
}

.hero-content { position: relative; z-index: 1; }
.hero-badge {
  display: inline-flex; align-items: center; gap: 0.5rem;
  padding: 0.5rem 1.2rem; border-radius: 50px;
  background: rgba(108, 92, 231, 0.15);
  border: 1px solid rgba(108, 92, 231, 0.3);
  color: var(--accent-secondary); font-size: 0.85rem; font-weight: 500;
  margin-bottom: 1.5rem;
  animation: fadeInUp 0.6s ease;
}
.hero-title {
  font-size: clamp(2.2rem, 5vw, 3.8rem);
  font-weight: 900; line-height: 1.15; margin-bottom: 1.2rem;
  animation: fadeInUp 0.6s ease 0.1s both;
}
.gradient-text {
  background: var(--gradient-primary);
  -webkit-background-clip: text; background-clip: text;
  -webkit-text-fill-color: transparent;
}
.hero-subtitle {
  max-width: 650px; margin: 0 auto 2rem; color: var(--text-secondary);
  font-size: 1.1rem; line-height: 1.7;
  animation: fadeInUp 0.6s ease 0.2s both;
}

/* Hero Search */
.hero-search {
  max-width: 550px; margin: 0 auto 2.5rem; position: relative;
  animation: fadeInUp 0.6s ease 0.3s both;
}
.hero-search i {
  position: absolute; left: 1.2rem; top: 50%; transform: translateY(-50%);
  color: var(--text-muted); font-size: 1.1rem;
}
.hero-search input {
  width: 100%; padding: 1rem 1.2rem 1rem 3rem;
  background: var(--bg-glass);
  backdrop-filter: blur(12px);
  border: 2px solid var(--border-color);
  border-radius: 50px; color: var(--text-primary);
  font-size: 1rem; font-family: inherit;
  transition: var(--transition);
}
.hero-search input:focus {
  outline: none; border-color: var(--accent-primary);
  box-shadow: 0 0 0 4px rgba(108, 92, 231, 0.15);
}
.hero-search input::placeholder { color: var(--text-muted); }

.hero-stats {
  display: flex; justify-content: center; gap: 3rem;
  animation: fadeInUp 0.6s ease 0.4s both;
}
.hero-stat strong {
  display: block; font-size: 1.8rem; font-weight: 800;
  background: var(--gradient-primary);
  -webkit-background-clip: text; background-clip: text;
  -webkit-text-fill-color: transparent;
}
.hero-stat span { font-size: 0.85rem; color: var(--text-muted); }

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

/* --- Category Tabs --- */
.tools-section { padding: 3rem 0 5rem; }
.category-tabs {
  display: flex; gap: 0.5rem; flex-wrap: wrap;
  margin-bottom: 2.5rem; padding-bottom: 1rem;
  border-bottom: 1px solid var(--border-color);
}
.cat-tab {
  padding: 0.6rem 1.2rem; border: 1px solid var(--border-color);
  border-radius: 50px; background: transparent;
  color: var(--text-secondary); font-size: 0.85rem; font-weight: 500;
  cursor: pointer; transition: var(--transition); font-family: inherit;
  display: flex; align-items: center; gap: 0.4rem;
}
.cat-tab:hover { border-color: var(--accent-primary); color: var(--text-primary); }
.cat-tab.active {
  background: var(--gradient-primary); border-color: transparent;
  color: #fff; box-shadow: 0 4px 15px rgba(108, 92, 231, 0.4);
}
.cat-count {
  background: rgba(255,255,255,0.15); padding: 0.1rem 0.5rem;
  border-radius: 50px; font-size: 0.75rem;
}

/* --- Tools Grid --- */
.tools-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
  gap: 1.5rem;
}
.tool-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 1.8rem;
  display: flex; flex-direction: column;
  transition: var(--transition);
  position: relative; overflow: hidden;
}
.tool-card::before {
  content: ''; position: absolute; top: 0; left: 0; right: 0;
  height: 3px; background: var(--gradient-primary);
  transform: scaleX(0); transition: transform 0.4s ease;
}
.tool-card:hover {
  border-color: var(--border-hover);
  transform: translateY(-6px);
  box-shadow: var(--shadow-hover);
}
.tool-card:hover::before { transform: scaleX(1); }
.tool-card-icon {
  width: 56px; height: 56px;
  background: rgba(108, 92, 231, 0.12);
  border-radius: var(--radius-md);
  display: flex; align-items: center; justify-content: center;
  font-size: 1.5rem; color: var(--accent-primary);
  margin-bottom: 1.2rem;
  transition: var(--transition);
}
.tool-card:hover .tool-card-icon {
  background: var(--gradient-primary); color: #fff;
  transform: scale(1.08);
}
.tool-card-body { flex: 1; }
.tool-card-category {
  font-size: 0.75rem; font-weight: 600; text-transform: uppercase;
  letter-spacing: 0.08em; color: var(--accent-teal); margin-bottom: 0.5rem;
  display: inline-block;
}
.tool-card-title {
  font-size: 1.15rem; font-weight: 700; color: var(--text-primary);
  margin-bottom: 0.5rem;
}
.tool-card-desc {
  font-size: 0.88rem; color: var(--text-secondary); line-height: 1.5;
  margin-bottom: 1.2rem;
}
.tool-card-btn {
  display: inline-flex; align-items: center; gap: 0.5rem;
  padding: 0.7rem 1.4rem; border-radius: var(--radius-sm);
  background: rgba(108, 92, 231, 0.1);
  color: var(--accent-secondary); font-size: 0.88rem; font-weight: 600;
  transition: var(--transition); align-self: flex-start;
}
.tool-card-btn:hover {
  background: var(--gradient-primary); color: #fff;
  box-shadow: 0 4px 15px rgba(108, 92, 231, 0.4);
}
.tool-card-btn i { transition: transform 0.3s; }
.tool-card-btn:hover i { transform: translateX(3px); }

/* --- Tool Page --- */
.tool-page { padding: 6rem 0 4rem; }
.breadcrumb {
  display: flex; align-items: center; gap: 0.6rem;
  margin-bottom: 2rem; font-size: 0.88rem; color: var(--text-muted);
  flex-wrap: wrap;
}
.breadcrumb a { color: var(--text-secondary); }
.breadcrumb a:hover { color: var(--accent-primary); }
.breadcrumb .fa-chevron-right { font-size: 0.65rem; }

.tool-page-header {
  display: flex; align-items: flex-start; gap: 1.5rem;
  margin-bottom: 2.5rem;
}
.tool-page-icon {
  width: 72px; height: 72px; min-width: 72px;
  background: var(--gradient-primary);
  border-radius: var(--radius-lg);
  display: flex; align-items: center; justify-content: center;
  font-size: 2rem; color: #fff;
}
.tool-page-category {
  font-size: 0.8rem; font-weight: 600; text-transform: uppercase;
  letter-spacing: 0.08em; color: var(--accent-teal);
}
.tool-page-title {
  font-size: 2rem; font-weight: 800; margin: 0.3rem 0 0.5rem;
}
.tool-page-desc { color: var(--text-secondary); font-size: 1rem; max-width: 700px; }

.tool-render-area {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-xl);
  padding: 2.5rem;
  margin-bottom: 3rem;
  min-height: 200px;
}

/* Related Tools */
.related-tools { margin-top: 3rem; }
.related-title {
  font-size: 1.3rem; font-weight: 700; margin-bottom: 1.5rem;
  display: flex; align-items: center; gap: 0.6rem;
}
.related-title i { color: var(--accent-primary); }
.related-grid {
  display: grid; grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 1rem;
}
.related-card {
  display: flex; align-items: center; gap: 1rem;
  padding: 1.2rem; background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  transition: var(--transition); color: var(--text-primary);
}
.related-card:hover {
  border-color: var(--border-hover);
  transform: translateY(-3px);
  box-shadow: 0 8px 25px rgba(0,0,0,0.2);
}
.related-card-icon {
  width: 48px; height: 48px; min-width: 48px;
  background: rgba(108, 92, 231, 0.1);
  border-radius: var(--radius-sm);
  display: flex; align-items: center; justify-content: center;
  color: var(--accent-primary); font-size: 1.2rem;
}
.related-card h4 { font-size: 0.95rem; font-weight: 600; margin-bottom: 0.2rem; }
.related-card p { font-size: 0.8rem; color: var(--text-muted); }

/* --- Category Page --- */
.category-page { padding: 6rem 0 4rem; }
.category-header {
  display: flex; align-items: center; gap: 1.2rem;
  margin-bottom: 2.5rem;
}
.category-header-icon {
  width: 64px; height: 64px;
  background: var(--gradient-primary);
  border-radius: var(--radius-lg);
  display: flex; align-items: center; justify-content: center;
  font-size: 1.8rem; color: #fff;
}
.category-title { font-size: 1.8rem; font-weight: 800; }
.category-count { color: var(--text-muted); font-size: 0.95rem; }

/* --- 404 Page --- */
.error-page { padding: 10rem 0; text-align: center; }
.error-content { max-width: 500px; margin: 0 auto; }
.error-code {
  font-size: 8rem; font-weight: 900;
  background: var(--gradient-primary);
  -webkit-background-clip: text; background-clip: text;
  -webkit-text-fill-color: transparent;
  line-height: 1;
}
.error-title { font-size: 1.5rem; font-weight: 700; margin: 1rem 0 0.5rem; }
.error-desc { color: var(--text-secondary); margin-bottom: 2rem; }
.error-btn {
  display: inline-flex; align-items: center; gap: 0.5rem;
  padding: 0.8rem 2rem; background: var(--gradient-primary);
  border-radius: 50px; color: #fff; font-weight: 600;
}

/* --- Empty State --- */
.empty-state {
  grid-column: 1 / -1; text-align: center; padding: 4rem 2rem;
  color: var(--text-muted);
}
.empty-state i { font-size: 3rem; margin-bottom: 1rem; color: var(--accent-primary); opacity: 0.5; }
.empty-state h3 { font-size: 1.3rem; color: var(--text-secondary); margin-bottom: 0.5rem; }
.btn-back-home {
  display: inline-flex; align-items: center; gap: 0.5rem;
  padding: 0.7rem 1.5rem; background: var(--gradient-primary);
  border-radius: var(--radius-sm); color: #fff; font-weight: 600; margin-top: 1rem;
}

/* --- Footer --- */
.site-footer {
  background: var(--bg-secondary);
  border-top: 1px solid var(--border-color);
  padding: 4rem 0 0;
}
.footer-container { max-width: 1200px; margin: 0 auto; padding: 0 1.5rem; }
.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 3rem;
}
.footer-logo {
  display: flex; align-items: center; gap: 0.6rem;
  font-size: 1.3rem; font-weight: 800; color: var(--text-primary);
  margin-bottom: 1rem;
}
.footer-logo i {
  background: var(--gradient-primary);
  -webkit-background-clip: text; background-clip: text;
  -webkit-text-fill-color: transparent;
}
.footer-desc { color: var(--text-muted); font-size: 0.9rem; line-height: 1.6; margin-bottom: 1.2rem; }
.footer-social { display: flex; gap: 0.8rem; }
.social-link {
  width: 38px; height: 38px;
  display: flex; align-items: center; justify-content: center;
  background: rgba(108, 92, 231, 0.1);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  color: var(--text-secondary); font-size: 1rem;
  transition: var(--transition);
}
.social-link:hover {
  background: var(--gradient-primary); color: #fff;
  border-color: transparent; transform: translateY(-3px);
}
.footer-links-col h4 {
  font-size: 0.95rem; font-weight: 700; color: var(--text-primary);
  margin-bottom: 1rem;
}
.footer-links-col ul { list-style: none; }
.footer-links-col li { margin-bottom: 0.6rem; }
.footer-links-col a {
  color: var(--text-muted); font-size: 0.88rem;
  transition: var(--transition);
}
.footer-links-col a:hover { color: var(--accent-primary); padding-left: 4px; }
.footer-bottom {
  margin-top: 3rem; padding: 1.5rem 0;
  border-top: 1px solid var(--border-color);
  text-align: center;
}
.footer-bottom p { color: var(--text-muted); font-size: 0.85rem; }

/* --- Responsive --- */
@media (max-width: 768px) {
  .nav-links {
    position: fixed; top: 70px; left: 0; right: 0;
    background: rgba(10, 10, 26, 0.98);
    flex-direction: column; padding: 1rem;
    border-bottom: 1px solid var(--border-color);
    transform: translateY(-110%); transition: transform 0.3s ease;
  }
  .nav-links.active { transform: translateY(0); }
  .nav-toggle { display: flex; }
  .hero { padding: 8rem 0 3rem; }
  .hero-stats { gap: 1.5rem; }
  .hero-stat strong { font-size: 1.4rem; }
  .tools-grid { grid-template-columns: 1fr; }
  .tool-page-header { flex-direction: column; }
  .tool-render-area { padding: 1.5rem; }
  .footer-grid { grid-template-columns: 1fr; gap: 2rem; }
  .related-grid { grid-template-columns: 1fr; }
}

@media (max-width: 480px) {
  .hero-title { font-size: 1.8rem; }
  .category-tabs { gap: 0.3rem; }
  .cat-tab { padding: 0.5rem 0.8rem; font-size: 0.8rem; }
}