/* ============================================
   FreeToolset v3 — Shared Stylesheet
   Dark-first design system with GitHub-inspired
   dark theme, modern minimalism, and responsive layout
   ============================================ */

/* ---------- CSS Variables (Dark Theme — Default) ---------- */
:root {
  --primary: #a78bfa;
  --primary-dark: #8b5cf6;
  --primary-light: #1e1b4b;
  --primary-glow: rgba(167, 139, 250, 0.15);
  --secondary: #a78bfa;
  --accent: #f472b6;
  --success: #3fb950;
  --warning: #d29922;
  --danger: #f85149;
  --info: #58a6ff;

  --bg: #0d1117;
  --bg-grad-1: #0d1117;
  --bg-grad-2: #0d1117;
  --navbar-bg: #161b22;
  --card-bg: #161b22;
  --card-bg-hover: #1c2230;
  --text: #f0f6fc;
  --text-secondary: #8b949e;
  --text-muted: #6e7681;
  --border: #30363d;
  --border-hover: #484f58;

  --radius-sm: 8px;
  --radius: 14px;
  --radius-lg: 20px;
  --radius-xl: 28px;

  --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.4);
  --shadow: 0 4px 16px rgba(0, 0, 0, 0.4);
  --shadow-md: 0 8px 24px rgba(0, 0, 0, 0.5);
  --shadow-hover: 0 16px 40px rgba(167, 139, 250, 0.15);
  --shadow-glow: 0 0 40px rgba(167, 139, 250, 0.08);

  --transition: 0.25s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-slow: 0.4s cubic-bezier(0.4, 0, 0.2, 1);

  --max-width: 1140px;
  --max-width-narrow: 820px;

  --navbar-height: 64px;
}

/* ---------- Light Mode (via system preference) ---------- */
@media (prefers-color-scheme: light) {
  :root {
    --primary: #6366f1;
    --primary-dark: #4f46e5;
    --primary-light: #eef2ff;
    --primary-glow: rgba(99, 102, 241, 0.12);
    --secondary: #8b5cf6;
    --accent: #ec4899;
    --success: #22c55e;
    --warning: #f59e0b;
    --danger: #ef4444;
    --info: #3b82f6;

    --bg: #f6f8fa;
    --bg-grad-1: #f6f8fa;
    --bg-grad-2: #f6f8fa;
    --navbar-bg: #ffffff;
    --card-bg: #ffffff;
    --card-bg-hover: #f9fafb;
    --text: #1f2328;
    --text-secondary: #636c76;
    --text-muted: #818b98;
    --border: #d0d7de;
    --border-hover: #afb8c1;

    --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.06);
    --shadow: 0 4px 16px rgba(0, 0, 0, 0.08);
    --shadow-md: 0 8px 24px rgba(0, 0, 0, 0.10);
    --shadow-hover: 0 16px 40px rgba(99, 102, 241, 0.15);
    --shadow-glow: 0 0 40px rgba(99, 102, 241, 0.08);
  }
}

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

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

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  background: var(--bg);
  background-image: linear-gradient(135deg, var(--bg-grad-1) 0%, var(--bg-grad-2) 100%);
  background-attachment: fixed;
  color: var(--text);
  line-height: 1.6;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

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

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

/* ---------- Navbar ---------- */
.navbar {
  background: var(--navbar-bg);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
  padding: 0 24px;
  height: var(--navbar-height);
  display: flex;
  align-items: center;
  justify-content: space-between;
  position: sticky;
  top: 0;
  z-index: 1000;
}

.navbar-brand {
  font-size: 1.25rem;
  font-weight: 800;
  color: var(--text);
  display: flex;
  align-items: center;
  gap: 8px;
  letter-spacing: -0.5px;
  white-space: nowrap;
}

.navbar-brand .logo-icon {
  font-size: 1.4rem;
  line-height: 1;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  transition: transform var(--transition);
}

.navbar-brand:hover .logo-icon {
  transform: scale(1.15);
}

.navbar-brand:hover {
  color: var(--text);
}

/* Nav links */
.navbar-nav {
  display: flex;
  align-items: center;
  gap: 4px;
}

.nav-link {
  padding: 8px 14px;
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--text-secondary);
  border-radius: var(--radius-sm);
  transition: all var(--transition);
  white-space: nowrap;
}

.nav-link:hover {
  color: var(--text);
  background: var(--card-bg-hover);
}

.nav-link.active {
  color: var(--primary);
}

.nav-lang {
  background: none;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 6px 10px;
  font-size: 1.1rem;
  cursor: pointer;
  transition: all var(--transition);
  line-height: 1;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  margin-left: 8px;
}

.nav-lang:hover {
  background: var(--card-bg-hover);
  border-color: var(--border-hover);
}

/* ---------- Main Content ---------- */
.main-content {
  flex: 1;
  width: 100%;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 48px 24px;
}

.main-content-narrow {
  max-width: var(--max-width-narrow);
}

/* ---------- Hero Section ---------- */
.hero {
  text-align: center;
  margin-bottom: 48px;
  position: relative;
}

.hero h1 {
  font-size: 3rem;
  font-weight: 900;
  margin-bottom: 16px;
  letter-spacing: -1px;
  line-height: 1.15;
  color: var(--text);
  animation: fadeInUp 0.6s ease 0.1s both;
}

.hero p {
  color: var(--text-secondary);
  font-size: 1.15rem;
  max-width: 580px;
  margin: 0 auto;
  line-height: 1.7;
  animation: fadeInUp 0.6s ease 0.2s both;
}

/* Hero Stats (kept for backward compat) */
.hero-stats {
  display: flex;
  justify-content: center;
  gap: 40px;
  margin-top: 32px;
  animation: fadeInUp 0.6s ease 0.3s both;
}

.hero-stat {
  text-align: center;
}

.hero-stat .stat-num {
  font-size: 2rem;
  font-weight: 900;
  color: var(--primary);
  line-height: 1;
}

.hero-stat .stat-text {
  font-size: 0.85rem;
  color: var(--text-secondary);
  margin-top: 4px;
}

/* ---------- Search Box ---------- */
.search-box {
  max-width: 560px;
  margin: 28px auto 0;
  position: relative;
  animation: fadeInUp 0.6s ease 0.3s both;
}

.search-box input {
  width: 100%;
  padding: 14px 20px 14px 48px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  font-size: 1rem;
  outline: none;
  transition: all var(--transition);
  background: var(--card-bg);
  color: var(--text);
  box-shadow: var(--shadow-sm);
}

.search-box input::placeholder {
  color: var(--text-muted);
}

.search-box input:focus {
  border-color: var(--primary);
  box-shadow: 0 0 0 3px var(--primary-glow);
}

.search-box .search-icon {
  position: absolute;
  left: 16px;
  top: 50%;
  transform: translateY(-50%);
  color: var(--text-muted);
  font-size: 1.1rem;
  pointer-events: none;
}

/* ---------- Section Title ---------- */
.section-title {
  font-size: 1.5rem;
  font-weight: 800;
  color: var(--text);
  margin-bottom: 24px;
  letter-spacing: -0.3px;
}

/* ---------- Category Filter ---------- */
.category-filter {
  display: flex;
  justify-content: center;
  gap: 8px;
  margin-bottom: 32px;
  flex-wrap: wrap;
  animation: fadeInUp 0.6s ease 0.4s both;
}

.category-btn {
  padding: 8px 20px;
  border: 1px solid var(--border);
  border-radius: 100px;
  background: var(--card-bg);
  color: var(--text-secondary);
  font-size: 0.875rem;
  font-weight: 600;
  cursor: pointer;
  transition: all var(--transition);
  font-family: inherit;
}

.category-btn:hover {
  border-color: var(--primary);
  color: var(--primary);
}

.category-btn.active {
  background: var(--primary);
  color: #fff;
  border-color: var(--primary);
  box-shadow: 0 4px 12px var(--primary-glow);
}

/* ---------- Tool Grid ---------- */
.tool-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 20px;
  margin-top: 8px;
}

.tool-card {
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 28px 24px;
  text-decoration: none;
  color: inherit;
  transition: all var(--transition);
  box-shadow: var(--shadow-sm);
  display: flex;
  flex-direction: column;
  gap: 12px;
  position: relative;
  overflow: hidden;
}

.tool-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--primary), var(--secondary));
  transform: scaleX(0);
  transform-origin: left;
  transition: transform var(--transition);
}

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

.tool-card:hover::before {
  transform: scaleX(1);
}

.tool-card .card-icon {
  width: 48px;
  height: 48px;
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
  background: var(--primary-light);
  color: var(--primary);
  transition: transform var(--transition);
  flex-shrink: 0;
}

.tool-card:hover .card-icon {
  transform: scale(1.08) rotate(-5deg);
}

.tool-card h3 {
  font-size: 1.1rem;
  font-weight: 700;
  letter-spacing: -0.3px;
  color: var(--text);
}

.tool-card p {
  font-size: 0.875rem;
  color: var(--text-secondary);
  flex: 1;
  line-height: 1.6;
}

/* Category badge */
.card-badge {
  display: inline-flex;
  align-items: center;
  padding: 3px 10px;
  border-radius: 100px;
  font-size: 0.7rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  width: fit-content;
}

.badge-image { background: rgba(244, 114, 182, 0.12); color: var(--accent); }
.badge-text { background: rgba(88, 166, 255, 0.12); color: var(--info); }
.badge-developer { background: rgba(63, 185, 80, 0.12); color: var(--success); }
.badge-security { background: rgba(210, 153, 34, 0.12); color: var(--warning); }
.badge-network { background: rgba(167, 139, 250, 0.12); color: var(--primary); }
.badge-ai { background: linear-gradient(135deg, rgba(167, 139, 250, 0.15), rgba(244, 114, 182, 0.15)); color: var(--primary); border: 1px solid rgba(167, 139, 250, 0.3); }

/* Popular tag */
.card-popular {
  position: absolute;
  top: 12px;
  right: 12px;
  background: var(--accent);
  color: #fff;
  font-size: 0.65rem;
  font-weight: 800;
  padding: 3px 8px;
  border-radius: 100px;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

/* ---------- Coming Soon Section ---------- */
.coming-soon {
  text-align: center;
  padding: 48px 24px;
  margin-top: 48px;
  background: var(--card-bg);
  border: 1px dashed var(--border);
  border-radius: var(--radius-lg);
}

.coming-soon h3 {
  font-size: 1.3rem;
  font-weight: 700;
  margin-bottom: 8px;
  color: var(--text);
}

.coming-soon p {
  color: var(--text-secondary);
  font-size: 0.95rem;
}

.coming-soon .coming-tags {
  display: flex;
  justify-content: center;
  gap: 8px;
  flex-wrap: wrap;
  margin-top: 16px;
}

.coming-soon .coming-tag {
  padding: 6px 14px;
  border-radius: 100px;
  font-size: 0.8rem;
  font-weight: 600;
  background: var(--bg);
  color: var(--text-muted);
  border: 1px solid var(--border);
}

/* ---------- Breadcrumb ---------- */
.breadcrumb {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.85rem;
  color: var(--text-muted);
  margin-bottom: 24px;
}

.breadcrumb a {
  color: var(--text-secondary);
  transition: color var(--transition);
}

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

.breadcrumb .separator {
  color: var(--text-muted);
}

.breadcrumb .current {
  color: var(--text);
  font-weight: 600;
}

/* ---------- Tool Page Layout ---------- */
.tool-header {
  margin-bottom: 28px;
}

.tool-header h1 {
  font-size: 2rem;
  font-weight: 800;
  margin-bottom: 8px;
  letter-spacing: -0.5px;
  display: flex;
  align-items: center;
  gap: 12px;
  color: var(--text);
}

.tool-header p {
  color: var(--text-secondary);
  font-size: 1rem;
}

/* Two-column layout */
.tool-layout {
  display: grid;
  grid-template-columns: 1fr 320px;
  gap: 32px;
  align-items: start;
}

.tool-main {
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 36px;
  box-shadow: var(--shadow);
}

.tool-sidebar {
  display: flex;
  flex-direction: column;
  gap: 24px;
  position: sticky;
  top: calc(var(--navbar-height) + 24px);
}

@media (max-width: 968px) {
  .tool-layout {
    grid-template-columns: 1fr;
  }
  .tool-sidebar {
    position: static;
  }
}

/* ---------- Info Sections ---------- */
.info-section {
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 28px;
  box-shadow: var(--shadow-sm);
}

.info-section h2 {
  font-size: 1.2rem;
  font-weight: 700;
  margin-bottom: 16px;
  display: flex;
  align-items: center;
  gap: 8px;
  color: var(--text);
}

/* How to Use */
.how-to-list {
  list-style: none;
  counter-reset: step;
}

.how-to-list li {
  counter-increment: step;
  padding: 12px 0 12px 48px;
  position: relative;
  font-size: 0.925rem;
  color: var(--text-secondary);
  border-bottom: 1px solid var(--border);
}

.how-to-list li:last-child {
  border-bottom: none;
}

.how-to-list li::before {
  content: counter(step);
  position: absolute;
  left: 0;
  top: 10px;
  width: 32px;
  height: 32px;
  background: linear-gradient(135deg, var(--primary), var(--secondary));
  color: #fff;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 0.875rem;
}

/* FAQ Accordion */
.faq-item {
  border-bottom: 1px solid var(--border);
}

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

.faq-item summary {
  padding: 16px 0;
  font-size: 0.95rem;
  font-weight: 600;
  cursor: pointer;
  list-style: none;
  display: flex;
  align-items: center;
  justify-content: space-between;
  transition: color var(--transition);
  color: var(--text);
}

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

.faq-item summary::after {
  content: '+';
  font-size: 1.3rem;
  color: var(--primary);
  font-weight: 400;
  transition: transform var(--transition);
  flex-shrink: 0;
  margin-left: 12px;
}

.faq-item[open] summary::after {
  transform: rotate(45deg);
}

.faq-item summary:hover {
  color: var(--primary);
}

.faq-item p {
  padding: 0 0 16px 0;
  font-size: 0.9rem;
  color: var(--text-secondary);
  line-height: 1.7;
}

/* Use Cases */
.use-case-grid {
  display: grid;
  gap: 16px;
}

.use-case-item {
  display: flex;
  gap: 14px;
  align-items: flex-start;
}

.use-case-item .uc-icon {
  width: 40px;
  height: 40px;
  border-radius: 10px;
  background: var(--primary-light);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.1rem;
  flex-shrink: 0;
}

.use-case-item .uc-content h4 {
  font-size: 0.925rem;
  font-weight: 700;
  margin-bottom: 2px;
  color: var(--text);
}

.use-case-item .uc-content p {
  font-size: 0.85rem;
  color: var(--text-secondary);
}

/* Related Tools */
.related-tools-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
}

.related-tool-card {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 14px;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  text-decoration: none;
  color: inherit;
  transition: all var(--transition);
  background: var(--card-bg);
}

.related-tool-card:hover {
  border-color: var(--primary);
  background: var(--card-bg-hover);
  transform: translateX(4px);
}

.related-tool-card .rt-icon {
  font-size: 1.3rem;
  flex-shrink: 0;
}

.related-tool-card .rt-name {
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--text);
}

.related-tool-card:hover .rt-name {
  color: var(--primary);
}

/* Privacy notice */
.privacy-notice {
  margin-top: 24px;
  padding: 16px 20px;
  background: var(--primary-light);
  border-radius: var(--radius-sm);
  font-size: 0.85rem;
  color: var(--text-secondary);
  display: flex;
  align-items: center;
  gap: 10px;
  border: 1px solid var(--border);
}

.privacy-notice .pn-icon {
  font-size: 1.1rem;
  flex-shrink: 0;
}

/* ---------- Form Elements ---------- */
label {
  display: block;
  font-weight: 600;
  margin-bottom: 8px;
  font-size: 0.9rem;
  color: var(--text);
}

input[type="text"],
input[type="number"],
input[type="password"],
input[type="url"],
input[type="email"],
textarea,
select {
  width: 100%;
  padding: 12px 16px;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  font-size: 0.95rem;
  font-family: inherit;
  outline: none;
  transition: all var(--transition);
  background: var(--bg);
  color: var(--text);
}

input::placeholder,
textarea::placeholder {
  color: var(--text-muted);
}

input:focus,
textarea:focus,
select:focus {
  border-color: var(--primary);
  box-shadow: 0 0 0 3px var(--primary-glow);
}

textarea {
  resize: vertical;
  min-height: 120px;
  font-family: "SF Mono", Monaco, "Cascadia Code", "Courier New", monospace;
}

input[type="range"] {
  width: 100%;
  accent-color: var(--primary);
  height: 6px;
}

input[type="color"] {
  width: 100%;
  height: 48px;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  cursor: pointer;
  background: var(--bg);
}

select option {
  background: var(--card-bg);
  color: var(--text);
}

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 24px;
  border: none;
  border-radius: var(--radius-sm);
  font-size: 0.925rem;
  font-weight: 600;
  cursor: pointer;
  transition: all var(--transition);
  font-family: inherit;
  white-space: nowrap;
}

.btn-primary {
  background: linear-gradient(135deg, var(--primary), var(--primary-dark));
  color: #fff;
  box-shadow: 0 4px 12px var(--primary-glow);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 20px var(--primary-glow);
}

.btn-primary:active {
  transform: translateY(0);
}

.btn-secondary {
  background: var(--card-bg);
  color: var(--text);
  border: 1px solid var(--border);
}

.btn-secondary:hover {
  background: var(--card-bg-hover);
  border-color: var(--border-hover);
  color: var(--primary);
}

.btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
  transform: none !important;
}

.btn-group {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
}

/* ---------- Output / Result Area ---------- */
.result-box {
  margin-top: 20px;
  padding: 16px;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  word-break: break-all;
  font-family: "SF Mono", Monaco, "Cascadia Code", "Courier New", monospace;
  font-size: 0.9rem;
  min-height: 50px;
  color: var(--text);
}

.result-box.empty {
  color: var(--text-secondary);
  font-style: italic;
}

/* ---------- Stats Grid (Word Counter) ---------- */
.stats-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(120px, 1fr));
  gap: 16px;
  margin: 20px 0;
}

.stat-item {
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 20px;
  text-align: center;
  transition: transform var(--transition);
}

.stat-item:hover {
  transform: translateY(-2px);
  border-color: var(--primary);
}

.stat-item .stat-value {
  font-size: 2rem;
  font-weight: 800;
  background: linear-gradient(135deg, var(--primary), var(--secondary));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.stat-item .stat-label {
  font-size: 0.75rem;
  color: var(--text-secondary);
  text-transform: uppercase;
  letter-spacing: 0.5px;
  margin-top: 4px;
}

/* ---------- Checkbox / Toggle ---------- */
.checkbox-group {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.checkbox-item {
  display: flex;
  align-items: center;
  gap: 10px;
  cursor: pointer;
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--text);
}

.checkbox-item input[type="checkbox"] {
  width: 20px;
  height: 20px;
  accent-color: var(--primary);
  cursor: pointer;
  border-radius: 4px;
}

/* ---------- Color Picker Specific ---------- */
.color-preview {
  width: 100%;
  height: 120px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border);
  margin-bottom: 16px;
  transition: all var(--transition);
}

.color-values {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 12px;
}

.color-value-item {
  display: flex;
  align-items: center;
  gap: 8px;
}

.color-value-item label {
  min-width: 50px;
  margin: 0;
  font-size: 0.85rem;
}

.color-value-item .copy-btn {
  font-size: 0.8rem;
  padding: 6px 12px;
}

/* ---------- Range Label ---------- */
.range-row {
  display: flex;
  align-items: center;
  gap: 12px;
}

.range-row input[type="range"] {
  flex: 1;
}

.range-value {
  min-width: 50px;
  text-align: right;
  font-weight: 700;
  color: var(--primary);
}

/* ---------- Form Rows ---------- */
.form-row {
  margin-bottom: 22px;
}

.form-row:last-child {
  margin-bottom: 0;
}

/* ---------- File Upload ---------- */
.file-upload-area {
  border: 2px dashed var(--border);
  border-radius: var(--radius);
  padding: 40px;
  text-align: center;
  cursor: pointer;
  transition: all var(--transition);
}

.file-upload-area:hover,
.file-upload-area.dragover {
  border-color: var(--primary);
  background: var(--primary-light);
}

.file-upload-area .upload-icon {
  font-size: 2.5rem;
  margin-bottom: 12px;
}

.file-upload-area p {
  color: var(--text-secondary);
  font-size: 0.9rem;
}

/* ---------- Image Preview ---------- */
.image-preview-container {
  display: flex;
  gap: 20px;
  flex-wrap: wrap;
  margin-top: 24px;
}

.image-preview {
  flex: 1;
  min-width: 200px;
}

.image-preview h4 {
  font-size: 0.8rem;
  color: var(--text-secondary);
  margin-bottom: 8px;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.image-preview img {
  max-width: 100%;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border);
}

.image-preview .image-info {
  font-size: 0.85rem;
  color: var(--text-secondary);
  margin-top: 8px;
}

/* ---------- JSON Formatter ---------- */
.json-output {
  background: #0d1117;
  color: #cdd6f4;
  padding: 18px;
  border-radius: var(--radius-sm);
  font-family: "SF Mono", Monaco, "Cascadia Code", "Courier New", monospace;
  font-size: 0.875rem;
  overflow-x: auto;
  white-space: pre-wrap;
  word-break: break-all;
  min-height: 100px;
  line-height: 1.6;
  border: 1px solid var(--border);
}

.json-output.error {
  background: rgba(248, 81, 73, 0.1);
  color: var(--danger);
  border: 1px solid rgba(248, 81, 73, 0.3);
}

@media (prefers-color-scheme: light) {
  .json-output {
    background: #1e1e2e;
  }
}

.json-key { color: #89b4fa; }
.json-string { color: #a6e3a1; }
.json-number { color: #fab387; }
.json-boolean { color: #cba6f7; }
.json-null { color: #f38ba8; }

/* ---------- Toast Notification ---------- */
.toast {
  position: fixed;
  bottom: 32px;
  left: 50%;
  transform: translateX(-50%) translateY(100px);
  background: var(--card-bg);
  color: var(--text);
  padding: 14px 28px;
  border-radius: var(--radius-sm);
  font-size: 0.9rem;
  font-weight: 600;
  opacity: 0;
  transition: all 0.35s cubic-bezier(0.4, 0, 0.2, 1);
  z-index: 9999;
  pointer-events: none;
  box-shadow: var(--shadow-md);
  border: 1px solid var(--border);
}

.toast.show {
  transform: translateX(-50%) translateY(0);
  opacity: 1;
}

/* ---------- Page Content (About/Privacy/Contact) ---------- */
.page-content {
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 40px;
  box-shadow: var(--shadow);
}

.page-content h1 {
  font-size: 2rem;
  font-weight: 800;
  margin-bottom: 8px;
  letter-spacing: -0.5px;
  color: var(--text);
}

.page-content .page-subtitle {
  color: var(--text-secondary);
  font-size: 1.05rem;
  margin-bottom: 32px;
}

.page-content h2 {
  font-size: 1.3rem;
  font-weight: 700;
  margin-top: 32px;
  margin-bottom: 12px;
  color: var(--text);
}

.page-content p {
  color: var(--text-secondary);
  margin-bottom: 12px;
  line-height: 1.8;
}

.page-content ul {
  padding-left: 20px;
  margin-bottom: 16px;
}

.page-content ul li {
  color: var(--text-secondary);
  margin-bottom: 8px;
  line-height: 1.7;
}

.page-content strong {
  color: var(--text);
}

.page-content code {
  background: var(--bg);
  padding: 2px 6px;
  border-radius: 4px;
  font-family: "SF Mono", Monaco, "Cascadia Code", monospace;
  font-size: 0.875rem;
  color: var(--primary);
}

/* Contact form */
.contact-form {
  max-width: 560px;
  margin-top: 24px;
}

.contact-form .form-row {
  margin-bottom: 20px;
}

/* ---------- Footer ---------- */
.footer {
  background: var(--navbar-bg);
  border-top: 1px solid var(--border);
  padding: 40px 24px 24px;
  margin-top: auto;
}

.footer-content {
  max-width: var(--max-width);
  margin: 0 auto;
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 32px;
  align-items: start;
}

.footer-brand {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 1.1rem;
  font-weight: 800;
  color: var(--text);
  margin-bottom: 8px;
}

.footer-brand .logo-icon {
  font-size: 1.3rem;
  line-height: 1;
}

.footer-desc {
  color: var(--text-secondary);
  font-size: 0.875rem;
  max-width: 360px;
}

.footer-links {
  display: flex;
  gap: 24px;
  flex-wrap: wrap;
}

.footer-links a {
  color: var(--text-secondary);
  font-size: 0.875rem;
  font-weight: 500;
  transition: color var(--transition);
}

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

.footer-bottom {
  max-width: var(--max-width);
  margin: 32px auto 0;
  padding-top: 20px;
  border-top: 1px solid var(--border);
  text-align: center;
  color: var(--text-muted);
  font-size: 0.825rem;
}

@media (max-width: 640px) {
  .footer-content {
    grid-template-columns: 1fr;
  }
}

/* ---------- Port Lookup Styles ---------- */
.port-search-box {
  max-width: 100%;
  margin-bottom: 20px;
  position: relative;
}

.port-search-box input {
  width: 100%;
  padding: 12px 16px 12px 44px;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  font-size: 0.95rem;
  outline: none;
  transition: all var(--transition);
  background: var(--bg);
  color: var(--text);
}

.port-search-box input::placeholder {
  color: var(--text-muted);
}

.port-search-box input:focus {
  border-color: var(--primary);
  box-shadow: 0 0 0 3px var(--primary-glow);
}

.port-search-box .search-icon {
  position: absolute;
  left: 14px;
  top: 50%;
  transform: translateY(-50%);
  color: var(--text-muted);
  font-size: 1.1rem;
  pointer-events: none;
}

.port-filter-tags {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
  margin-bottom: 24px;
}

.port-filter-tag {
  padding: 6px 14px;
  border: 1px solid var(--border);
  border-radius: 100px;
  background: var(--bg);
  color: var(--text-secondary);
  font-size: 0.8rem;
  font-weight: 600;
  cursor: pointer;
  transition: all var(--transition);
  font-family: inherit;
  white-space: nowrap;
}

.port-filter-tag:hover {
  border-color: var(--primary);
  color: var(--primary);
}

.port-filter-tag.active {
  background: var(--primary);
  color: #fff;
  border-color: var(--primary);
}

.port-table-wrap {
  overflow-x: auto;
  border: 1px solid var(--border);
  border-radius: var(--radius);
}

.port-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.875rem;
}

.port-table th {
  background: var(--bg);
  padding: 12px 16px;
  text-align: left;
  font-weight: 700;
  color: var(--text);
  border-bottom: 1px solid var(--border);
  white-space: nowrap;
  position: sticky;
  top: 0;
}

.port-table td {
  padding: 10px 16px;
  border-bottom: 1px solid var(--border);
  color: var(--text-secondary);
}

.port-table tr:last-child td {
  border-bottom: none;
}

.port-table tr:hover td {
  background: var(--card-bg-hover);
}

.port-number {
  font-family: "SF Mono", Monaco, "Cascadia Code", monospace;
  font-weight: 700;
  color: var(--text);
  cursor: pointer;
  transition: color var(--transition);
  white-space: nowrap;
}

.port-number:hover {
  color: var(--primary);
}

.port-proto {
  display: inline-block;
  padding: 2px 8px;
  border-radius: 4px;
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
}

.port-proto.tcp {
  background: rgba(88, 166, 255, 0.12);
  color: var(--info);
}

.port-proto.udp {
  background: rgba(210, 153, 34, 0.12);
  color: var(--warning);
}

.port-proto.tcpudp {
  background: rgba(167, 139, 250, 0.12);
  color: var(--primary);
}

.port-cat {
  display: inline-block;
  padding: 2px 8px;
  border-radius: 4px;
  font-size: 0.75rem;
  font-weight: 600;
  background: var(--primary-light);
  color: var(--primary);
}

.port-risk {
  display: inline-block;
  padding: 2px 8px;
  border-radius: 4px;
  font-size: 0.72rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.3px;
}

.port-risk.high {
  background: rgba(248, 81, 73, 0.12);
  color: var(--danger);
}

.port-risk.tls {
  background: rgba(63, 185, 80, 0.12);
  color: var(--success);
}

.port-risk.medium {
  background: rgba(210, 153, 34, 0.12);
  color: var(--warning);
}

.port-risk.safe {
  background: rgba(88, 166, 255, 0.12);
  color: var(--info);
}

.port-count {
  font-size: 0.85rem;
  color: var(--text-muted);
  margin-bottom: 16px;
}

.port-no-results {
  text-align: center;
  padding: 40px;
  color: var(--text-muted);
  font-size: 0.95rem;
}

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

@keyframes fadeIn {
  from { opacity: 0; }
  to { opacity: 1; }
}

.tool-card {
  animation: fadeInUp 0.5s ease both;
}

.tool-card:nth-child(1) { animation-delay: 0.05s; }
.tool-card:nth-child(2) { animation-delay: 0.1s; }
.tool-card:nth-child(3) { animation-delay: 0.15s; }
.tool-card:nth-child(4) { animation-delay: 0.2s; }
.tool-card:nth-child(5) { animation-delay: 0.25s; }
.tool-card:nth-child(6) { animation-delay: 0.3s; }
.tool-card:nth-child(7) { animation-delay: 0.35s; }
.tool-card:nth-child(8) { animation-delay: 0.4s; }
.tool-card:nth-child(9) { animation-delay: 0.45s; }

/* ---------- QR Code output ---------- */
#qrcode {
  margin-top: 24px;
  text-align: center;
  display: flex;
  justify-content: center;
}

#qrcode canvas,
#qrcode img {
  border-radius: var(--radius-sm);
  border: 1px solid var(--border);
}

/* ---------- Responsive ---------- */
@media (max-width: 768px) {
  .hero h1 {
    font-size: 2.2rem;
  }

  .hero p {
    font-size: 1rem;
  }

  .hero-stats {
    gap: 24px;
  }

  .hero-stat .stat-num {
    font-size: 1.6rem;
  }

  .tool-grid {
    grid-template-columns: 1fr;
  }

  .tool-main {
    padding: 24px;
  }

  .page-content {
    padding: 24px;
  }

  .image-preview-container {
    flex-direction: column;
  }

  .btn-group {
    flex-direction: column;
  }

  .btn-group .btn {
    width: 100%;
  }

  .related-tools-grid {
    grid-template-columns: 1fr;
  }

  .navbar {
    padding: 0 16px;
  }

  .main-content {
    padding: 32px 16px;
  }

  .nav-link {
    padding: 6px 10px;
    font-size: 0.85rem;
  }

  .navbar-nav {
    gap: 2px;
  }
}

@media (max-width: 600px) {
  .nav-lang {
    display: none;
  }
}

@media (max-width: 480px) {
  .hero h1 {
    font-size: 1.8rem;
  }

  .hero-stats {
    gap: 16px;
  }

  .tool-header h1 {
    font-size: 1.5rem;
    flex-wrap: wrap;
  }

  .category-filter {
    gap: 6px;
  }

  .category-btn {
    padding: 6px 14px;
    font-size: 0.8rem;
  }

  .navbar-nav {
    gap: 0;
  }

  .nav-link {
    padding: 6px 8px;
    font-size: 0.8rem;
  }
}