/* ==========================================================================
   OmniConverter Ultra-Modern Theme (Glassmorphic, SaaS Aesthetic)
   ========================================================================== */

:root {
  /* Color Palette - Vibrant Indigo/Violet Modern Gradient Theme */
  --primary-50: #eef2ff;
  --primary-100: #e0e7ff;
  --primary-200: #c7d2fe;
  --primary-500: #6366f1;
  --primary-600: #4f46e5;
  --primary-700: #4338ca;

  --accent-cyan: #06b6d4;
  --accent-emerald: #10b981;

  --bg-gradient: linear-gradient(135deg, #f8fafc 0%, #f1f5f9 50%, #e2e8f0 100%);
  --card-bg: rgba(255, 255, 255, 0.85);
  --card-border: rgba(226, 232, 240, 0.8);

  --text-main: #0f172a;
  --text-muted: #64748b;
  --text-light: #94a3b8;

  --shadow-sm: 0 1px 3px 0 rgba(0, 0, 0, 0.05), 0 1px 2px 0 rgba(0, 0, 0, 0.03);
  --shadow-md: 0 4px 12px -2px rgba(0, 0, 0, 0.08), 0 2px 6px -1px rgba(0, 0, 0, 0.04);
  --shadow-glow: 0 12px 30px -5px rgba(99, 102, 241, 0.25), 0 8px 10px -6px rgba(99, 102, 241, 0.1);

  --radius-xl: 20px;
  --radius-lg: 14px;
  --radius-md: 10px;

  --font-sans: 'Inter', system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
}

/* System Dark Mode Theme Overrides */
@media (prefers-color-scheme: dark) {
  :root {
    --bg-gradient: linear-gradient(135deg, #0b0f19 0%, #0f172a 50%, #1e1b4b 100%);
    --card-bg: rgba(30, 41, 59, 0.75);
    --card-border: rgba(51, 65, 85, 0.6);
    --text-main: #f8fafc;
    --text-muted: #cbd5e1;
    --text-light: #64748b;

    --shadow-glow: 0 12px 30px -5px rgba(99, 102, 241, 0.4), 0 8px 10px -6px rgba(0, 0, 0, 0.5);
  }
}

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

body {
  font-family: var(--font-sans);
  background: var(--bg-gradient);
  background-attachment: fixed;
  color: var(--text-main);
  line-height: 1.6;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

/* Header & Glassmorphic Navigation */
header {
  background: var(--card-bg);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--card-border);
  padding: 1rem 1.5rem;
  position: sticky;
  top: 0;
  z-index: 100;
}

.header-container {
  max-width: 1200px;
  margin: 0 auto;
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  align-items: center;
  gap: 1rem;
}

.logo {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  font-size: 1.35rem;
  font-weight: 800;
  background: linear-gradient(135deg, var(--primary-600), var(--accent-cyan));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  text-decoration: none;
  letter-spacing: -0.02em;
}

.logo svg {
  width: 32px;
  height: 32px;
  fill: var(--primary-600);
}

/* Pill Navigation Tabs */
.nav-tabs {
  display: flex;
  flex-wrap: wrap;
  gap: 0.35rem;
  background: rgba(15, 23, 42, 0.05);
  padding: 0.35rem;
  border-radius: var(--radius-xl);
  border: 1px solid var(--card-border);
}

@media (prefers-color-scheme: dark) {
  .nav-tabs {
    background: rgba(255, 255, 255, 0.05);
  }
}

.tab-btn {
  padding: 0.55rem 1rem;
  font-size: 0.88rem;
  font-weight: 600;
  border: none;
  background: transparent;
  color: var(--text-muted);
  border-radius: var(--radius-lg);
  cursor: pointer;
  transition: all 0.25s cubic-bezier(0.4, 0, 0.2, 1);
}

.tab-btn:hover {
  color: var(--text-main);
  background: rgba(99, 102, 241, 0.08);
}

.tab-btn.active {
  background: linear-gradient(135deg, var(--primary-600), var(--primary-700));
  color: #ffffff;
  box-shadow: 0 4px 12px rgba(79, 70, 229, 0.3);
}

/* Main Layout & Cards */
main {
  flex: 1;
  max-width: 950px;
  width: 100%;
  margin: 2.5rem auto;
  padding: 0 1.25rem;
}

.tool-tab-content {
  display: none;
  animation: fadeIn 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.tool-tab-content.active {
  display: block;
}

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(8px); }
  to { opacity: 1; transform: translateY(0); }
}

/* Glassmorphic Calculator Card */
.converter-card {
  background: var(--card-bg);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border: 1px solid var(--card-border);
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-glow);
  padding: 2.25rem;
  margin-bottom: 2.5rem;
  content-visibility: auto;
}

.converter-title {
  font-size: 1.85rem;
  font-weight: 800;
  text-align: center;
  margin-bottom: 1.75rem;
  color: var(--text-main);
  letter-spacing: -0.025em;
}

.converter-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.25rem;
  align-items: end;
}

@media (min-width: 768px) {
  .converter-grid {
    grid-template-columns: 2fr 1.5fr auto 1.5fr;
  }
}

.input-group {
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
}

.input-group label {
  font-size: 0.85rem;
  font-weight: 700;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

.input-field, .select-field {
  width: 100%;
  padding: 0.85rem 1.15rem;
  font-size: 1.15rem;
  font-family: inherit;
  font-weight: 600;
  border: 1.5px solid var(--card-border);
  border-radius: var(--radius-lg);
  background-color: rgba(255, 255, 255, 0.6);
  color: var(--text-main);
  transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
  min-height: 52px;
}

@media (prefers-color-scheme: dark) {
  .input-field, .select-field {
    background-color: rgba(15, 23, 42, 0.6);
  }
}

.input-field:focus-visible, .select-field:focus-visible {
  outline: none;
  border-color: var(--primary-500);
  box-shadow: 0 0 0 4px rgba(99, 102, 241, 0.2);
}

/* Action Buttons */
.btn-swap {
  background: linear-gradient(135deg, var(--primary-50), var(--primary-100));
  border: 1px solid var(--card-border);
  color: var(--primary-600);
  border-radius: var(--radius-lg);
  width: 52px;
  height: 52px;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  margin: 0 auto;
  transition: all 0.2s ease;
}

@media (prefers-color-scheme: dark) {
  .btn-swap {
    background: rgba(99, 102, 241, 0.15);
    color: var(--primary-200);
  }
}

.btn-swap:hover {
  background: var(--primary-600);
  color: #ffffff;
  transform: rotate(180deg);
}

.btn-swap:active {
  transform: scale(0.92) rotate(180deg);
}

.button-row {
  display: flex;
  gap: 1rem;
  margin-top: 1.75rem;
}

.btn-convert, .btn-clear {
  flex: 1;
  padding: 0.85rem 1.5rem;
  font-size: 1.05rem;
  font-weight: 700;
  border-radius: var(--radius-lg);
  cursor: pointer;
  border: none;
  min-height: 52px;
  transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
}

.btn-convert {
  background: linear-gradient(135deg, var(--primary-600), var(--primary-700));
  color: #ffffff;
  box-shadow: 0 4px 14px rgba(79, 70, 229, 0.35);
}

.btn-convert:hover {
  box-shadow: 0 6px 20px rgba(79, 70, 229, 0.5);
  transform: translateY(-1px);
}

.btn-clear {
  background: var(--card-border);
  color: var(--text-muted);
}

.btn-clear:hover {
  background: var(--text-light);
  color: #ffffff;
}

/* Display Result Card */
.result-container {
  margin-top: 2rem;
  padding: 1.75rem;
  background: linear-gradient(135deg, rgba(99, 102, 241, 0.08), rgba(6, 182, 212, 0.08));
  border: 1.5px solid rgba(99, 102, 241, 0.25);
  border-radius: var(--radius-lg);
}

.result-main {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 1rem;
  margin-bottom: 1.25rem;
}

.result-text-group {
  display: flex;
  flex-direction: column;
}

.result-label {
  font-size: 0.85rem;
  font-weight: 800;
  color: var(--primary-600);
  text-transform: uppercase;
  letter-spacing: 0.06em;
}

.result-value {
  font-size: 2.5rem;
  font-weight: 900;
  color: var(--text-main);
  word-break: break-word;
  letter-spacing: -0.03em;
}

.btn-copy {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  background-color: var(--card-bg);
  color: var(--primary-600);
  border: 1.5px solid var(--primary-600);
  padding: 0.6rem 1.2rem;
  font-size: 0.9rem;
  font-weight: 700;
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: all 0.2s ease;
}

.btn-copy:hover {
  background-color: var(--primary-600);
  color: #ffffff;
  box-shadow: 0 4px 12px rgba(99, 102, 241, 0.3);
}

.formula-box, .explanation-box {
  border-top: 1px solid rgba(99, 102, 241, 0.15);
  padding-top: 0.85rem;
  margin-top: 0.85rem;
  font-size: 0.98rem;
}

.formula-box strong, .explanation-box strong {
  color: var(--text-main);
}

/* Content & Article Sections */
.content-section {
  background: var(--card-bg);
  backdrop-filter: blur(12px);
  border: 1px solid var(--card-border);
  border-radius: var(--radius-xl);
  padding: 2.25rem;
  margin-bottom: 2rem;
  box-shadow: var(--shadow-sm);
}

.content-section h2 {
  font-size: 1.55rem;
  font-weight: 800;
  margin-bottom: 1rem;
  color: var(--text-main);
  border-bottom: 2px solid rgba(99, 102, 241, 0.15);
  padding-bottom: 0.6rem;
  letter-spacing: -0.02em;
}

.content-section h3 {
  font-size: 1.25rem;
  font-weight: 700;
  margin: 1.35rem 0 0.6rem 0;
}

.content-section p {
  margin-bottom: 1rem;
  color: var(--text-muted);
}

.formula-badge {
  display: inline-block;
  background: linear-gradient(135deg, rgba(99, 102, 241, 0.12), rgba(6, 182, 212, 0.12));
  color: var(--primary-600);
  padding: 0.55rem 1.15rem;
  font-family: monospace;
  font-size: 1.15rem;
  font-weight: 800;
  border-radius: var(--radius-md);
  margin: 0.5rem 0 1rem 0;
  border: 1px solid rgba(99, 102, 241, 0.2);
}

/* Modern Card Link Grids */
.quick-conversions-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
  gap: 1.15rem;
  margin-top: 1rem;
}

.quick-card {
  display: block;
  padding: 1rem 1.25rem;
  background: rgba(255, 255, 255, 0.5);
  border: 1px solid var(--card-border);
  border-radius: var(--radius-lg);
  text-decoration: none;
  color: var(--text-main);
  font-weight: 700;
  font-size: 0.95rem;
  transition: all 0.25s cubic-bezier(0.4, 0, 0.2, 1);
}

@media (prefers-color-scheme: dark) {
  .quick-card {
    background: rgba(15, 23, 42, 0.5);
  }
}

.quick-card:hover {
  border-color: var(--primary-500);
  background: var(--primary-50);
  color: var(--primary-600);
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

@media (prefers-color-scheme: dark) {
  .quick-card:hover {
    background: rgba(99, 102, 241, 0.15);
    color: var(--primary-200);
  }
}

/* Toast Notifications */
.toast {
  position: fixed;
  bottom: 2rem;
  right: 2rem;
  background: var(--text-main);
  color: var(--bg-main);
  padding: 0.85rem 1.5rem;
  border-radius: var(--radius-lg);
  font-size: 0.95rem;
  font-weight: 700;
  box-shadow: var(--shadow-glow);
  opacity: 0;
  pointer-events: none;
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  transform: translateY(12px);
}

.toast.show {
  opacity: 1;
  transform: translateY(0);
}

/* Footer */
footer {
  background: var(--card-bg);
  backdrop-filter: blur(12px);
  border-top: 1px solid var(--card-border);
  padding: 2.25rem 1.5rem;
  text-align: center;
  font-size: 0.9rem;
  color: var(--text-muted);
}

/* ==========================================================================
   Modern Blog & Magazine UI Components
   ========================================================================== */

.blog-hero-section {
  max-width: 1200px;
  margin: 1.5rem auto 2.5rem auto;
  padding: 0 1rem;
}

.blog-hero-card {
  background: var(--card-bg);
  backdrop-filter: blur(16px);
  border: 1px solid var(--card-border);
  border-radius: var(--radius-xl);
  padding: 2.5rem;
  box-shadow: var(--shadow-glow);
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.5rem;
  position: relative;
  overflow: hidden;
}

@media (min-width: 768px) {
  .blog-hero-card {
    grid-template-columns: 1.5fr 1fr;
    align-items: center;
  }
}

.blog-hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  background: linear-gradient(135deg, var(--primary-600), var(--accent-cyan));
  color: #ffffff;
  font-size: 0.8rem;
  font-weight: 800;
  padding: 0.35rem 0.85rem;
  border-radius: 20px;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: 1rem;
}

.blog-hero-title {
  font-size: 2.2rem;
  font-weight: 900;
  line-height: 1.25;
  letter-spacing: -0.03em;
  margin-bottom: 1rem;
  color: var(--text-main);
}

.blog-hero-title a {
  color: inherit;
  text-decoration: none;
  transition: color 0.2s ease;
}

.blog-hero-title a:hover {
  color: var(--primary-600);
}

.blog-meta-bar {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 1rem;
  font-size: 0.88rem;
  color: var(--text-muted);
  margin-top: 1rem;
}

.blog-controls-wrapper {
  max-width: 1200px;
  margin: 0 auto 1.5rem auto;
  padding: 0 1rem;
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

@media (min-width: 768px) {
  .blog-controls-wrapper {
    flex-direction: row;
    justify-content: space-between;
    align-items: center;
  }
}

.blog-search-box {
  position: relative;
  flex: 1;
  max-width: 420px;
}

.blog-search-input {
  width: 100%;
  padding: 0.6rem 1rem 0.6rem 2.4rem;
  background: var(--card-bg);
  border: 1px solid var(--card-border);
  border-radius: var(--radius-lg);
  font-size: 0.9rem;
  color: var(--text-main);
  outline: none;
  transition: all 0.2s ease;
}

.blog-search-input:focus {
  border-color: var(--primary-500);
  box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.2);
}

.blog-search-icon {
  position: absolute;
  left: 0.8rem;
  top: 50%;
  transform: translateY(-50%);
  color: var(--text-muted);
  pointer-events: none;
}

.category-filter-bar {
  display: flex;
  flex-wrap: nowrap;
  gap: 0.4rem;
  overflow-x: auto;
  padding-bottom: 0.35rem;
  -webkit-overflow-scrolling: touch;
  scrollbar-width: none;
}

.category-filter-bar::-webkit-scrollbar {
  display: none;
}

.category-pill {
  padding: 0.4rem 0.9rem;
  font-size: 0.8rem;
  font-weight: 700;
  border-radius: 20px;
  background: var(--card-bg);
  border: 1px solid var(--card-border);
  color: var(--text-muted);
  cursor: pointer;
  white-space: nowrap;
  transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
}

.category-pill:hover {
  border-color: var(--primary-500);
  color: var(--primary-600);
}

.category-pill.active {
  background: linear-gradient(135deg, var(--primary-600), var(--primary-700));
  color: #ffffff;
  border-color: transparent;
  box-shadow: 0 4px 10px rgba(79, 70, 229, 0.25);
}

.blog-cards-grid {
  max-width: 1200px;
  margin: 0 auto 2rem auto;
  padding: 0 1rem;
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 1.25rem;
}

.blog-card {
  background: var(--card-bg);
  backdrop-filter: blur(12px);
  border: 1px solid var(--card-border);
  border-radius: var(--radius-xl);
  padding: 1.75rem;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  box-shadow: var(--shadow-sm);
}

.blog-card:hover {
  transform: translateY(-5px);
  border-color: var(--primary-500);
  box-shadow: var(--shadow-glow);
}

.blog-card-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 0.85rem;
}

.blog-card-tag {
  font-size: 0.75rem;
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  padding: 0.25rem 0.65rem;
  border-radius: 8px;
  background: rgba(99, 102, 241, 0.1);
  color: var(--primary-600);
}

.blog-card-icon {
  font-size: 1.5rem;
}

.blog-card-title {
  font-size: 1.3rem;
  font-weight: 800;
  line-height: 1.35;
  margin-bottom: 0.75rem;
  color: var(--text-main);
}

.blog-card-title a {
  color: inherit;
  text-decoration: none;
  transition: color 0.2s ease;
}

.blog-card-title a:hover {
  color: var(--primary-600);
}

.blog-card-summary {
  font-size: 0.95rem;
  color: var(--text-muted);
  line-height: 1.6;
  margin-bottom: 1.25rem;
  flex: 1;
}

.blog-card-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  border-top: 1px solid var(--card-border);
  padding-top: 1rem;
  margin-top: auto;
}

.blog-btn-read {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  font-size: 0.9rem;
  font-weight: 700;
  color: var(--primary-600);
  text-decoration: none;
  transition: gap 0.2s ease;
}

.blog-btn-read:hover {
  gap: 0.6rem;
  color: var(--primary-700);
}

/* Pagination Bar */
.pagination-wrapper {
  max-width: 1200px;
  margin: 1.5rem auto 3rem auto;
  padding: 0 1rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 1rem;
}

.pagination-controls {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.page-btn {
  padding: 0.5rem 1rem;
  font-size: 0.9rem;
  font-weight: 700;
  border-radius: var(--radius-md);
  background: var(--card-bg);
  border: 1px solid var(--card-border);
  color: var(--text-main);
  cursor: pointer;
  transition: all 0.2s ease;
}

.page-btn:hover:not(:disabled) {
  border-color: var(--primary-500);
  color: var(--primary-600);
}

.page-btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

.page-btn.active {
  background: var(--primary-600);
  color: #ffffff;
  border-color: var(--primary-600);
}

.page-info {
  font-size: 0.9rem;
  color: var(--text-muted);
  font-weight: 600;
}

/* Modal Article Reader View */
.article-modal-backdrop {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(15, 23, 42, 0.7);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  z-index: 1000;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 1.5rem;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.3s ease;
}

.article-modal-backdrop.open {
  opacity: 1;
  pointer-events: auto;
}

.article-modal-content {
  background: var(--card-bg);
  border: 1px solid var(--card-border);
  border-radius: var(--radius-xl);
  max-width: 800px;
  width: 100%;
  max-height: 85vh;
  overflow-y: auto;
  padding: 2.5rem;
  position: relative;
  box-shadow: var(--shadow-glow);
  transform: translateY(20px);
  transition: transform 0.3s ease;
}

.article-modal-backdrop.open .article-modal-content {
  transform: translateY(0);
}

.article-modal-close {
  position: absolute;
  top: 1.25rem;
  right: 1.25rem;
  background: rgba(15, 23, 42, 0.08);
  border: none;
  border-radius: 50%;
  width: 36px;
  height: 36px;
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--text-main);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: background 0.2s ease;
}

.article-modal-close:hover {
  background: rgba(99, 102, 241, 0.2);
  color: var(--primary-600);
}

/* ==========================================================================
   Smallpdf-Style Homepage CSS (Hero & Colorful Tool Grid)
   ========================================================================== */

.smallpdf-hero {
  text-align: center;
  padding: 3rem 1rem 2.5rem 1rem;
  max-width: 850px;
  margin: 0 auto;
}

.smallpdf-hero-title {
  font-size: 2.75rem;
  font-weight: 900;
  line-height: 1.15;
  letter-spacing: -0.03em;
  color: var(--text-main);
  margin-bottom: 1rem;
}

.smallpdf-hero-subtitle {
  font-size: 1.15rem;
  color: var(--text-muted);
  line-height: 1.6;
  font-weight: 450;
  max-width: 720px;
  margin: 0 auto 2rem auto;
}

.smallpdf-tools-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: 1.25rem;
  margin-bottom: 3.5rem;
}

.smallpdf-tool-card {
  background: var(--card-bg);
  border: 1px solid var(--card-border);
  border-radius: var(--radius-xl);
  padding: 1.5rem;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  text-decoration: none;
  color: var(--text-main);
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  box-shadow: var(--shadow-sm);
  position: relative;
  overflow: hidden;
}

.smallpdf-tool-card:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-md), var(--shadow-glow);
  border-color: rgba(99, 102, 241, 0.3);
}

.smallpdf-card-icon {
  width: 48px;
  height: 48px;
  border-radius: var(--radius-lg);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
  margin-bottom: 1rem;
  font-weight: 700;
  color: #ffffff;
}

.icon-red { background: linear-gradient(135deg, #ef4444, #dc2626); }
.icon-blue { background: linear-gradient(135deg, #3b82f6, #2563eb); }
.icon-emerald { background: linear-gradient(135deg, #10b981, #059669); }
.icon-purple { background: linear-gradient(135deg, #8b5cf6, #7c3aed); }
.icon-orange { background: linear-gradient(135deg, #f97316, #ea580c); }
.icon-cyan { background: linear-gradient(135deg, #06b6d4, #0891b2); }
.icon-amber { background: linear-gradient(135deg, #f59e0b, #d97706); }
.icon-pink { background: linear-gradient(135deg, #ec4899, #db2777); }

.smallpdf-card-title {
  font-size: 1.15rem;
  font-weight: 800;
  margin-bottom: 0.4rem;
  color: var(--text-main);
  line-height: 1.3;
}

.smallpdf-card-desc {
  font-size: 0.88rem;
  color: var(--text-muted);
  line-height: 1.5;
  margin-bottom: 1.25rem;
}

.smallpdf-card-action {
  font-size: 0.85rem;
  font-weight: 800;
  color: var(--primary-600);
  display: flex;
  align-items: center;
  gap: 0.35rem;
}

.smallpdf-tool-card:hover .smallpdf-card-action {
  color: var(--primary-700);
}

/* ==========================================================================
   Clean Glassmorphic Conversion Table
   ========================================================================== */
.table-wrapper {
  overflow-x: auto;
  margin: 1.5rem 0;
  border-radius: var(--radius-lg);
  border: 1px solid var(--card-border);
  background: var(--card-bg);
}

.conversion-table {
  width: 100%;
  border-collapse: collapse;
  text-align: left;
  font-size: 0.95rem;
}

.conversion-table th {
  background: rgba(99, 102, 241, 0.08);
  color: var(--text-main);
  font-weight: 800;
  padding: 0.85rem 1rem;
  border-bottom: 2px solid var(--card-border);
}

.conversion-table td {
  padding: 0.75rem 1rem;
  border-bottom: 1px solid var(--card-border);
  color: var(--text-main);
}

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

.conversion-table tr:hover {
  background: rgba(99, 102, 241, 0.04);
}

/* ==========================================================================
   Responsive Mobile Menu Dropdown Optimization
   ========================================================================== */
.mobile-menu-btn {
  display: none;
  align-items: center;
  gap: 0.5rem;
  background: var(--card-bg);
  border: 1px solid var(--card-border);
  color: var(--text-main);
  padding: 0.5rem 0.85rem;
  border-radius: var(--radius-lg);
  font-weight: 700;
  font-size: 0.9rem;
  cursor: pointer;
  box-shadow: var(--shadow-sm);
  transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
}

.mobile-menu-btn:hover,
.mobile-menu-btn:active {
  background: var(--primary-50);
  border-color: var(--primary-500);
}

@media (max-width: 768px) {
  header {
    padding: 0.75rem 1rem;
  }

  .header-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 0.5rem;
    position: relative;
  }

  .logo {
    font-size: 1.2rem;
  }

  /* Show Mobile Menu Dropdown Button on small screens */
  .mobile-menu-btn {
    display: flex !important;
  }

  /* Navigation Dropdown Menu on Mobile */
  .nav-tabs {
    display: none !important;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    width: 100%;
    flex-direction: column;
    gap: 0.35rem;
    padding: 0.75rem;
    margin-top: 0.5rem;
    background: var(--card-bg);
    backdrop-filter: blur(24px);
    -webkit-backdrop-filter: blur(24px);
    border: 1px solid var(--card-border);
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-glow), 0 10px 25px -5px rgba(0, 0, 0, 0.15);
    z-index: 999;
  }

  .nav-tabs.is-open {
    display: flex !important;
    animation: slideNavDown 0.25s cubic-bezier(0.4, 0, 0.2, 1) forwards;
  }

  .tab-btn {
    width: 100%;
    text-align: left;
    white-space: normal;
    padding: 0.7rem 1rem;
    font-size: 0.95rem;
    font-weight: 600;
    border-radius: var(--radius-md);
  }

  main {
    padding: 1rem 0.75rem !important;
  }

  .content-section {
    padding: 1.25rem 1rem !important;
    border-radius: var(--radius-lg) !important;
  }

  .content-section h1 {
    font-size: 1.5rem !important;
    line-height: 1.25 !important;
  }

  .content-section h2 {
    font-size: 1.25rem !important;
  }

  .content-section img {
    max-height: 220px !important;
    border-radius: var(--radius-lg) !important;
  }

  .smallpdf-hero-title {
    font-size: 1.85rem !important;
  }

  .smallpdf-hero-subtitle {
    font-size: 0.98rem !important;
  }

  .smallpdf-tools-grid {
    grid-template-columns: 1fr !important;
    gap: 0.85rem !important;
  }

  .table-wrapper {
    margin: 1rem 0 !important;
  }

  .conversion-table th, 
  .conversion-table td {
    padding: 0.6rem 0.75rem !important;
    font-size: 0.85rem !important;
  }
}

@keyframes slideNavDown {
  from {
    opacity: 0;
    transform: translateY(-10px) scale(0.98);
  }
  to {
    opacity: 1;
    transform: translateY(0) scale(1);
  }
}