/* ==========================================================================
   Yoosk Tools Design System & Modern UI
   ========================================================================== */

:root {
  --bg-main: #080c14;
  --bg-surface: #0f172a;
  --bg-card: rgba(18, 26, 43, 0.75);
  --bg-card-hover: rgba(26, 38, 63, 0.85);
  --bg-input: #0b1220;
  --border-card: rgba(255, 255, 255, 0.08);
  --border-card-hover: rgba(99, 102, 241, 0.4);
  
  --primary: #6366f1;
  --primary-hover: #4f46e5;
  --primary-glow: rgba(99, 102, 241, 0.35);
  --gradient-primary: linear-gradient(135deg, #6366f1 0%, #a855f7 100%);
  --gradient-emerald: linear-gradient(135deg, #10b981 0%, #06b6d4 100%);
  --gradient-amber: linear-gradient(135deg, #f59e0b 0%, #ef4444 100%);
  
  --text-main: #f8fafc;
  --text-muted: #94a3b8;
  --text-dim: #64748b;
  
  --radius-sm: 8px;
  --radius-md: 14px;
  --radius-lg: 20px;
  --radius-full: 9999px;
  
  --transition: all 0.25s cubic-bezier(0.16, 1, 0.3, 1);
  --shadow-card: 0 10px 30px -10px rgba(0, 0, 0, 0.5);
  --shadow-glow: 0 0 25px rgba(99, 102, 241, 0.25);
}

* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
  -webkit-font-smoothing: antialiased;
}

body {
  background-color: var(--bg-main);
  background-image: 
    radial-gradient(at 0% 0%, rgba(99, 102, 241, 0.12) 0px, transparent 50%),
    radial-gradient(at 100% 100%, rgba(168, 85, 247, 0.08) 0px, transparent 50%);
  background-attachment: fixed;
  color: var(--text-main);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

a {
  color: inherit;
  text-decoration: none;
}

/* Header & Navbar */
.navbar {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(8, 12, 20, 0.85);
  backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--border-card);
  padding: 14px 24px;
}

.nav-container {
  max-width: 1280px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 1.25rem;
  font-weight: 800;
  letter-spacing: -0.5px;
}

.logo-badge {
  background: var(--gradient-primary);
  color: white;
  width: 34px;
  height: 34px;
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.1rem;
  box-shadow: 0 4px 12px rgba(99, 102, 241, 0.4);
}

.logo span {
  background: linear-gradient(135deg, #ffffff 40%, #94a3b8 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 20px;
}

.nav-link {
  color: var(--text-muted);
  font-size: 0.95rem;
  font-weight: 500;
  transition: var(--transition);
  padding: 6px 12px;
  border-radius: var(--radius-sm);
}

.nav-link:hover, .nav-link.active {
  color: var(--text-main);
  background: rgba(255, 255, 255, 0.05);
}

/* Layout container */
.container {
  max-width: 1240px;
  margin: 0 auto;
  padding: 40px 20px 80px;
  flex: 1;
  width: 100%;
}

/* Hero Section */
.hero {
  text-align: center;
  max-width: 760px;
  margin: 0 auto 50px;
}

.hero-tag {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: rgba(99, 102, 241, 0.12);
  border: 1px solid rgba(99, 102, 241, 0.3);
  color: #a5b4fc;
  padding: 6px 14px;
  border-radius: var(--radius-full);
  font-size: 0.85rem;
  font-weight: 600;
  margin-bottom: 20px;
}

.hero-title {
  font-size: 3rem;
  font-weight: 800;
  letter-spacing: -1px;
  line-height: 1.15;
  margin-bottom: 18px;
}

.hero-title .gradient-text {
  background: var(--gradient-primary);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.hero-desc {
  font-size: 1.15rem;
  color: var(--text-muted);
  line-height: 1.6;
  margin-bottom: 30px;
}

/* Search and Filters */
.search-wrapper {
  position: relative;
  max-width: 580px;
  margin: 0 auto 36px;
}

.search-input {
  width: 100%;
  background: var(--bg-card);
  border: 1px solid var(--border-card);
  border-radius: var(--radius-md);
  padding: 16px 20px 16px 48px;
  color: var(--text-main);
  font-size: 1.05rem;
  outline: none;
  backdrop-filter: blur(12px);
  transition: var(--transition);
}

.search-input:focus {
  border-color: var(--primary);
  box-shadow: var(--shadow-glow);
}

.search-icon {
  position: absolute;
  left: 18px;
  top: 50%;
  transform: translateY(-50%);
  color: var(--text-dim);
  font-size: 1.2rem;
}

.category-tabs {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 10px;
  margin-bottom: 40px;
}

.category-tab {
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid var(--border-card);
  color: var(--text-muted);
  padding: 8px 18px;
  border-radius: var(--radius-full);
  font-size: 0.9rem;
  font-weight: 600;
  cursor: pointer;
  transition: var(--transition);
}

.category-tab:hover, .category-tab.active {
  background: var(--primary);
  color: white;
  border-color: var(--primary);
  box-shadow: 0 4px 14px rgba(99, 102, 241, 0.4);
}

/* Tools Grid */
.tools-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
  gap: 22px;
}

.tool-card {
  background: var(--bg-card);
  backdrop-filter: blur(14px);
  border: 1px solid var(--border-card);
  border-radius: var(--radius-lg);
  padding: 24px;
  display: flex;
  flex-direction: column;
  transition: var(--transition);
  position: relative;
  overflow: hidden;
}

.tool-card:hover {
  transform: translateY(-4px);
  border-color: var(--border-card-hover);
  box-shadow: var(--shadow-glow);
  background: var(--bg-card-hover);
}

.tool-header {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  margin-bottom: 16px;
}

.tool-icon {
  width: 50px;
  height: 50px;
  border-radius: 14px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
  background: rgba(99, 102, 241, 0.12);
  border: 1px solid rgba(99, 102, 241, 0.2);
}

.badge {
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  padding: 4px 10px;
  border-radius: var(--radius-full);
  background: rgba(255, 255, 255, 0.08);
  color: var(--text-muted);
}

.badge.ai {
  background: rgba(168, 85, 247, 0.15);
  color: #c084fc;
  border: 1px solid rgba(168, 85, 247, 0.3);
}

.badge.hot {
  background: rgba(239, 68, 68, 0.15);
  color: #f87171;
  border: 1px solid rgba(239, 68, 68, 0.3);
}

.badge.fast {
  background: rgba(16, 185, 129, 0.15);
  color: #34d399;
  border: 1px solid rgba(16, 185, 129, 0.3);
}

.tool-title {
  font-size: 1.2rem;
  font-weight: 700;
  margin-bottom: 8px;
  color: var(--text-main);
}

.tool-desc {
  font-size: 0.92rem;
  color: var(--text-muted);
  line-height: 1.5;
  margin-bottom: 20px;
  flex: 1;
}

.tool-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  border-top: 1px solid rgba(255, 255, 255, 0.05);
  padding-top: 14px;
}

.tool-tag {
  font-size: 0.8rem;
  color: var(--text-dim);
}

.tool-btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  color: #818cf8;
  font-size: 0.9rem;
  font-weight: 600;
  transition: var(--transition);
}

.tool-card:hover .tool-btn {
  color: white;
  transform: translateX(3px);
}

/* Tool Execution Page Elements */
.page-header {
  margin-bottom: 34px;
}

.breadcrumb {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.85rem;
  color: var(--text-dim);
  margin-bottom: 14px;
}

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

.page-title {
  font-size: 2.2rem;
  font-weight: 800;
  letter-spacing: -0.5px;
  margin-bottom: 10px;
}

.page-subtitle {
  font-size: 1.05rem;
  color: var(--text-muted);
  max-width: 700px;
}

.tool-panel {
  background: var(--bg-card);
  backdrop-filter: blur(16px);
  border: 1px solid var(--border-card);
  border-radius: var(--radius-lg);
  padding: 36px;
  margin-bottom: 30px;
  box-shadow: var(--shadow-card);
}

/* Dropzone */
.quality-card {
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid var(--border-card);
  border-radius: var(--radius-sm);
  padding: 12px;
  text-align: center;
  cursor: pointer;
  transition: var(--transition);
}

.quality-card:hover {
  border-color: var(--border-card-hover);
  background: rgba(99, 102, 241, 0.08);
}

.quality-card.active {
  border-color: var(--primary);
  background: rgba(99, 102, 241, 0.18);
  box-shadow: 0 0 16px rgba(99, 102, 241, 0.3);
}

.dropzone {
  border: 2px dashed rgba(255, 255, 255, 0.15);
  border-radius: var(--radius-md);
  padding: 44px 20px;
  text-align: center;
  background: rgba(11, 18, 32, 0.5);
  cursor: pointer;
  transition: var(--transition);
  position: relative;
}

.dropzone:hover, .dropzone.dragover {
  border-color: var(--primary);
  background: rgba(99, 102, 241, 0.05);
}

.dropzone-icon {
  font-size: 3rem;
  margin-bottom: 14px;
  color: #818cf8;
}

.dropzone-title {
  font-size: 1.15rem;
  font-weight: 700;
  margin-bottom: 6px;
}

.dropzone-sub {
  font-size: 0.9rem;
  color: var(--text-muted);
}

.file-input {
  display: none;
}

/* Form inputs & Buttons */
.form-group {
  margin-bottom: 20px;
}

.form-label {
  display: block;
  font-size: 0.9rem;
  font-weight: 600;
  margin-bottom: 8px;
  color: var(--text-main);
}

.form-control {
  width: 100%;
  background: var(--bg-input);
  border: 1px solid var(--border-card);
  border-radius: var(--radius-sm);
  padding: 14px 16px;
  color: var(--text-main);
  font-size: 1rem;
  outline: none;
  transition: var(--transition);
}

.form-control:focus {
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.2);
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 14px 28px;
  border-radius: var(--radius-sm);
  font-size: 1rem;
  font-weight: 600;
  cursor: pointer;
  border: none;
  transition: var(--transition);
}

.btn-primary {
  background: var(--gradient-primary);
  color: white;
  box-shadow: 0 4px 16px rgba(99, 102, 241, 0.4);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 22px rgba(99, 102, 241, 0.5);
}

.btn-block {
  width: 100%;
}

.btn-success {
  background: var(--gradient-emerald);
  color: white;
}

/* Processing Progress */
.progress-box {
  display: none;
  margin-top: 24px;
  text-align: center;
  padding: 24px;
  background: rgba(11, 18, 32, 0.7);
  border-radius: var(--radius-md);
  border: 1px solid var(--border-card);
}

.progress-bar-wrap {
  width: 100%;
  height: 8px;
  background: rgba(255, 255, 255, 0.08);
  border-radius: var(--radius-full);
  overflow: hidden;
  margin: 16px 0;
}

.progress-bar-fill {
  height: 100%;
  width: 0%;
  background: var(--gradient-primary);
  transition: width 0.3s ease;
}

/* Ad Placement Placeholder (Yandex РСЯ ready) */
.ad-slot {
  margin: 30px 0;
  padding: 20px;
  background: rgba(255, 255, 255, 0.02);
  border: 1px dashed rgba(255, 255, 255, 0.06);
  border-radius: var(--radius-md);
  text-align: center;
  color: var(--text-dim);
  font-size: 0.8rem;
  letter-spacing: 1px;
  text-transform: uppercase;
  min-height: 90px;
  display: flex;
  align-items: center;
  justify-content: center;
}

/* Content & FAQ */
.info-section {
  margin-top: 40px;
  padding-top: 30px;
  border-top: 1px solid var(--border-card);
}

.info-title {
  font-size: 1.4rem;
  font-weight: 700;
  margin-bottom: 14px;
}

.info-text {
  color: var(--text-muted);
  line-height: 1.65;
  margin-bottom: 20px;
}

.faq-item {
  background: rgba(255, 255, 255, 0.02);
  border: 1px solid var(--border-card);
  border-radius: var(--radius-sm);
  padding: 16px 20px;
  margin-bottom: 12px;
}

.faq-q {
  font-weight: 700;
  margin-bottom: 6px;
}

.faq-a {
  color: var(--text-muted);
  font-size: 0.95rem;
  line-height: 1.5;
}

/* Footer */
.footer {
  border-top: 1px solid var(--border-card);
  background: rgba(8, 12, 20, 0.95);
  padding: 40px 20px;
  text-align: center;
  color: var(--text-dim);
  font-size: 0.9rem;
}

.footer-links {
  display: flex;
  justify-content: center;
  gap: 24px;
  margin-bottom: 16px;
}

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

@media (max-width: 768px) {
  .hero-title { font-size: 2.2rem; }
  .tools-grid { grid-template-columns: 1fr; }
  .nav-links { display: none; }
  .tool-panel { padding: 22px; }
}