:root {
  --color-primary: #0066cc;
  --color-primary-hover: #0052a3;
  --color-primary-light: #eff6ff;
  --color-bg-page: #ffffff;
  --color-bg-section: #f8fafc;
  --color-bg-card: #ffffff;
  --color-text-main: #0f172a;
  --color-text-muted: #475569;
  --color-text-light: #64748b;
  --color-border: #e2e8f0;
  --color-border-hover: #cbd5e1;
  --color-success: #10b981;
  --color-success-bg: #ecfdf5;
  --color-danger: #ef4444;
  --radius-sm: 4px;
  --radius-md: 6px;
  --radius-lg: 8px;
  --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.06), 0 2px 4px -1px rgba(0, 0, 0, 0.03);
  --font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
}

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

html {
  scroll-behavior: smooth;
  font-family: var(--font-family);
  color: var(--color-text-main);
  background-color: var(--color-bg-page);
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
}

body {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
  color: var(--color-text-main);
  font-weight: 700;
  line-height: 1.25;
}

p {
  color: var(--color-text-muted);
}

a {
  color: var(--color-primary);
  text-decoration: none;
  transition: color 0.15s ease;
}

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

/* Header & Navigation */
.navbar {
  position: sticky;
  top: 0;
  z-index: 100;
  background-color: #ffffff;
  border-bottom: 1px solid var(--color-border);
  padding: 0 1.5rem;
  height: 64px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.nav-container {
  max-width: 1200px;
  width: 100%;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.brand-title {
  font-size: 1.35rem;
  font-weight: 800;
  color: var(--color-text-main);
  letter-spacing: -0.02em;
  text-decoration: none;
  display: inline-flex;
  align-items: center;
}

.brand-title span {
  color: var(--color-primary);
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 1.75rem;
  list-style: none;
}

.nav-link {
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--color-text-muted);
  padding: 0.5rem 0.25rem;
  border-bottom: 2px solid transparent;
  transition: all 0.15s ease;
}

.nav-link:hover, .nav-link.active {
  color: var(--color-primary);
  border-bottom-color: var(--color-primary);
}

.mobile-menu-btn {
  display: none;
  background: none;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  padding: 0.5rem 0.75rem;
  font-size: 1rem;
  cursor: pointer;
  color: var(--color-text-main);
}

/* Hero Section */
.hero {
  background-color: #ffffff;
  padding: 3.5rem 1.5rem 2.5rem;
  text-align: center;
  border-bottom: 1px solid var(--color-border);
}

.hero-container {
  max-width: 800px;
  margin: 0 auto;
}

.hero-title {
  font-size: 2.5rem;
  font-weight: 800;
  color: var(--color-text-main);
  margin-bottom: 1rem;
  letter-spacing: -0.02em;
}

.hero-subtitle {
  font-size: 1.125rem;
  color: var(--color-text-muted);
  margin-bottom: 2rem;
  max-width: 620px;
  margin-left: auto;
  margin-right: auto;
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-family: inherit;
  font-size: 0.95rem;
  font-weight: 600;
  padding: 0.65rem 1.35rem;
  border-radius: var(--radius-md);
  cursor: pointer;
  border: 1px solid transparent;
  transition: background-color 0.15s ease, border-color 0.15s ease, box-shadow 0.15s ease;
  white-space: nowrap;
}

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

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

.btn-secondary {
  background-color: #ffffff;
  color: var(--color-text-main);
  border-color: var(--color-border);
}

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

.btn-outline {
  background-color: transparent;
  color: var(--color-primary);
  border-color: var(--color-primary);
}

.btn-outline:hover {
  background-color: var(--color-primary-light);
}

.btn-sm {
  font-size: 0.85rem;
  padding: 0.45rem 0.85rem;
}

.btn-lg {
  font-size: 1.05rem;
  padding: 0.85rem 1.75rem;
}

.btn-block {
  width: 100%;
}

/* Search & Filter Bar */
.search-filter-section {
  background-color: var(--color-bg-section);
  padding: 1.5rem 1.5rem;
  border-bottom: 1px solid var(--color-border);
}

.search-container {
  max-width: 1200px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
}

.search-box-wrapper {
  position: relative;
  max-width: 600px;
  width: 100%;
  margin: 0 auto;
}

.search-input {
  width: 100%;
  padding: 0.75rem 1rem 0.75rem 2.75rem;
  font-size: 0.95rem;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  outline: none;
  background-color: #ffffff;
  transition: border-color 0.15s ease, box-shadow 0.15s ease;
}

.search-input:focus {
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px rgba(0, 102, 204, 0.15);
}

.search-icon {
  position: absolute;
  left: 0.9rem;
  top: 50%;
  transform: translateY(-50%);
  color: var(--color-text-light);
  font-size: 1.1rem;
  pointer-events: none;
}

.category-pills {
  display: flex;
  align-items: center;
  justify-content: center;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.category-pill {
  font-size: 0.875rem;
  font-weight: 600;
  padding: 0.4rem 1rem;
  border-radius: 20px;
  background-color: #ffffff;
  color: var(--color-text-muted);
  border: 1px solid var(--color-border);
  cursor: pointer;
  transition: all 0.15s ease;
}

.category-pill:hover, .category-pill.active {
  background-color: var(--color-primary);
  color: #ffffff;
  border-color: var(--color-primary);
}

/* Tools Section */
.tools-section {
  padding: 2.5rem 1.5rem 4rem;
  max-width: 1200px;
  margin: 0 auto;
  width: 100%;
}

.category-block {
  margin-bottom: 3.5rem;
}

.category-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 1.25rem;
  padding-bottom: 0.5rem;
  border-bottom: 2px solid var(--color-border);
}

.category-title {
  font-size: 1.35rem;
  font-weight: 700;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.category-badge {
  font-size: 0.75rem;
  font-weight: 700;
  padding: 0.2rem 0.6rem;
  border-radius: var(--radius-sm);
  text-transform: uppercase;
}

.category-badge.pdf {
  background-color: #e0f2fe;
  color: #0369a1;
}

.category-badge.image {
  background-color: #dcfce7;
  color: #15803d;
}

.category-badge.ai {
  background-color: #f3e8ff;
  color: #6b21a8;
}

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

.tool-card {
  background-color: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 1.25rem;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  transition: border-color 0.15s ease, box-shadow 0.15s ease;
}

.tool-card:hover {
  border-color: var(--color-primary);
  box-shadow: var(--shadow-md);
}

.tool-card-body {
  margin-bottom: 1.25rem;
}

.tool-card-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 0.65rem;
}

.tool-card-name {
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--color-text-main);
}

.tool-card-desc {
  font-size: 0.875rem;
  color: var(--color-text-muted);
  line-height: 1.45;
}

.tool-card-btn {
  width: 100%;
}

/* Feature Highlights Bar */
.features-bar {
  background-color: var(--color-bg-section);
  border-top: 1px solid var(--color-border);
  border-bottom: 1px solid var(--color-border);
  padding: 2.5rem 1.5rem;
}

.features-container {
  max-width: 1200px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 2rem;
  text-align: center;
}

.feature-item h3 {
  font-size: 1.1rem;
  margin-bottom: 0.5rem;
}

.feature-item p {
  font-size: 0.9rem;
}

/* Interactive Workbench Modal / Drawer */
.modal-overlay {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background-color: rgba(15, 23, 42, 0.5);
  z-index: 1000;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 1rem;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.2s ease;
}

.modal-overlay.active {
  opacity: 1;
  pointer-events: auto;
}

.modal-container {
  background-color: #ffffff;
  border-radius: var(--radius-lg);
  max-width: 800px;
  width: 100%;
  max-height: 90vh;
  display: flex;
  flex-direction: column;
  box-shadow: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
  border: 1px solid var(--color-border);
  overflow: hidden;
}

.modal-header {
  padding: 1.25rem 1.5rem;
  border-bottom: 1px solid var(--color-border);
  display: flex;
  align-items: center;
  justify-content: space-between;
  background-color: var(--color-bg-section);
}

.modal-title-group {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.modal-title {
  font-size: 1.25rem;
  font-weight: 700;
}

.modal-close-btn {
  background: none;
  border: none;
  font-size: 1.5rem;
  line-height: 1;
  color: var(--color-text-light);
  cursor: pointer;
  padding: 0.25rem 0.5rem;
  border-radius: var(--radius-sm);
}

.modal-close-btn:hover {
  color: var(--color-text-main);
  background-color: var(--color-border);
}

.modal-body {
  padding: 1.5rem;
  overflow-y: auto;
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
}

/* File Drop Zone */
.drop-zone {
  border: 2px dashed var(--color-border);
  border-radius: var(--radius-md);
  padding: 2.5rem 1.5rem;
  text-align: center;
  background-color: var(--color-bg-section);
  cursor: pointer;
  transition: all 0.15s ease;
}

.drop-zone:hover, .drop-zone.dragover {
  border-color: var(--color-primary);
  background-color: var(--color-primary-light);
}

.drop-zone-title {
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--color-text-main);
  margin-bottom: 0.5rem;
}

.drop-zone-text {
  font-size: 0.875rem;
  color: var(--color-text-muted);
  margin-bottom: 1rem;
}

/* Form Controls & Inputs */
.form-group {
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
}

.form-label {
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--color-text-main);
}

.form-control {
  width: 100%;
  padding: 0.6rem 0.85rem;
  font-size: 0.9rem;
  font-family: inherit;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  background-color: #ffffff;
  outline: none;
}

.form-control:focus {
  border-color: var(--color-primary);
  box-shadow: 0 0 0 2px rgba(0, 102, 204, 0.15);
}

textarea.form-control {
  resize: vertical;
  min-height: 90px;
}

.form-row {
  display: flex;
  gap: 1rem;
}

.form-row > * {
  flex: 1;
}

/* Tool Settings Panel */
.tool-settings {
  background-color: var(--color-bg-section);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 1.25rem;
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

/* Output Preview Area */
.preview-container {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 1rem;
  margin-top: 0.5rem;
}

.preview-media {
  max-width: 100%;
  max-height: 320px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--color-border);
  object-fit: contain;
}

/* AI Results Grid */
.ai-results-grid {
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
}

.ai-result-card {
  background-color: var(--color-bg-section);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 1.25rem;
}

.ai-result-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 0.65rem;
}

.ai-result-title {
  font-size: 1rem;
  font-weight: 700;
  color: var(--color-primary);
}

.ai-result-content {
  font-size: 0.9rem;
  color: var(--color-text-main);
  line-height: 1.55;
  white-space: pre-wrap;
}

.ai-features-list {
  padding-left: 1.25rem;
}

.ai-features-list li {
  margin-bottom: 0.35rem;
}

/* Help Center Section */
.help-section {
  padding: 3.5rem 1.5rem;
  max-width: 900px;
  margin: 0 auto;
  width: 100%;
}

.section-title {
  font-size: 1.75rem;
  font-weight: 800;
  text-align: center;
  margin-bottom: 0.75rem;
}

.section-subtitle {
  font-size: 1rem;
  text-align: center;
  color: var(--color-text-muted);
  margin-bottom: 2.5rem;
}

/* FAQ Accordion */
.faq-container {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  margin-bottom: 3.5rem;
}

.faq-item {
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  overflow: hidden;
  background-color: #ffffff;
}

.faq-question {
  width: 100%;
  padding: 1rem 1.25rem;
  text-align: left;
  background: none;
  border: none;
  font-size: 1rem;
  font-weight: 700;
  color: var(--color-text-main);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.faq-question:hover {
  background-color: var(--color-bg-section);
}

.faq-answer {
  padding: 0 1.25rem 1rem;
  font-size: 0.925rem;
  color: var(--color-text-muted);
  line-height: 1.55;
  display: none;
}

.faq-item.active .faq-answer {
  display: block;
}

.faq-item.active .faq-question {
  border-bottom: 1px solid var(--color-border);
}

/* Contact Form */
.contact-container {
  background-color: var(--color-bg-section);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 2rem;
}

/* Footer */
.footer {
  background-color: #ffffff;
  border-top: 1px solid var(--color-border);
  padding: 3rem 1.5rem 1.5rem;
  margin-top: auto;
}

.footer-container {
  max-width: 1200px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 2rem;
}

.footer-top {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 2rem;
}

.footer-brand {
  max-width: 320px;
}

.footer-brand .brand-title {
  margin-bottom: 0.5rem;
}

.footer-links-group {
  display: flex;
  flex-wrap: wrap;
  gap: 3rem;
}

.footer-col h4 {
  font-size: 0.9rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: 0.85rem;
  color: var(--color-text-main);
}

.footer-col ul {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.footer-col a {
  font-size: 0.875rem;
  color: var(--color-text-muted);
}

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

.footer-bottom {
  padding-top: 1.5rem;
  border-top: 1px solid var(--color-border);
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 0.85rem;
  color: var(--color-text-light);
}

/* Toast / Alert Notifications */
.toast-container {
  position: fixed;
  bottom: 1.5rem;
  right: 1.5rem;
  z-index: 2000;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.toast {
  background-color: #1e293b;
  color: #ffffff;
  padding: 0.75rem 1.25rem;
  border-radius: var(--radius-md);
  font-size: 0.875rem;
  box-shadow: var(--shadow-md);
  animation: slideIn 0.2s ease forwards;
}

.toast.success {
  background-color: #065f46;
}

.toast.error {
  background-color: #991b1b;
}

@keyframes slideIn {
  from { transform: translateY(100%); opacity: 0; }
  to { transform: translateY(0); opacity: 1; }
}

/* Responsive Styles */
@media (max-width: 768px) {
  .hero-title {
    font-size: 1.85rem;
  }
  .nav-links {
    display: none;
    position: absolute;
    top: 64px;
    left: 0;
    right: 0;
    background-color: #ffffff;
    border-bottom: 1px solid var(--color-border);
    flex-direction: column;
    padding: 1rem 1.5rem;
    gap: 1rem;
    align-items: flex-start;
  }
  .nav-links.show {
    display: flex;
  }
  .mobile-menu-btn {
    display: block;
  }
  .form-row {
    flex-direction: column;
    gap: 0.75rem;
  }
  .footer-bottom {
    flex-direction: column;
    gap: 0.75rem;
    text-align: center;
  }
}

/* Dedicated Multi-Page Tool View Styling */
.tool-page-container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 1.5rem 1.5rem 3.5rem;
}

.breadcrumb-bar {
  margin-bottom: 1.5rem;
}

.breadcrumb-container {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.875rem;
  color: var(--color-text-light);
}

.breadcrumb-link {
  color: var(--color-primary);
  font-weight: 500;
  text-decoration: none;
}

.breadcrumb-link:hover {
  text-decoration: underline;
}

.breadcrumb-sep {
  color: var(--color-text-light);
}

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

.tool-hero-header {
  background-color: var(--color-bg-section);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 2rem 2rem;
  margin-bottom: 2rem;
  text-align: center;
}

.tool-hero-badge-wrap {
  margin-bottom: 0.75rem;
}

.tool-hero-title {
  font-size: 2rem;
  font-weight: 800;
  color: var(--color-text-main);
  margin-bottom: 0.5rem;
  letter-spacing: -0.02em;
}

.tool-hero-desc {
  font-size: 1.05rem;
  color: var(--color-text-muted);
  max-width: 700px;
  margin: 0 auto;
}

.tool-workbench-section {
  margin-bottom: 3rem;
}

.tool-workbench-card {
  background-color: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 1.75rem;
  box-shadow: var(--shadow-sm);
}

.related-tools-section {
  border-top: 1px solid var(--color-border);
  padding-top: 2.5rem;
}

.related-tools-title {
  font-size: 1.35rem;
  font-weight: 700;
  margin-bottom: 1.5rem;
  color: var(--color-text-main);
}

/* Form Range Slider Controls */
input[type="range"] {
  -webkit-appearance: none;
  appearance: none;
  width: 100%;
  height: 6px;
  background: #cbd5e1;
  border-radius: 4px;
  outline: none;
  cursor: pointer;
}

input[type="range"]::-webkit-slider-thumb {
  -webkit-appearance: none;
  appearance: none;
  width: 18px;
  height: 18px;
  border-radius: 50%;
  background: var(--color-primary);
  cursor: pointer;
  transition: transform 0.1s ease;
}

input[type="range"]::-webkit-slider-thumb:hover {
  transform: scale(1.15);
}

input[type="range"]:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

input[type="range"]:disabled::-webkit-slider-thumb {
  background: #94a3b8;
  cursor: not-allowed;
}

/* Before / After Image Comparison Viewer */
.comparison-wrapper {
  position: relative;
  width: 100%;
  max-width: 720px;
  margin: 1rem auto;
  border-radius: var(--radius-md);
  overflow: hidden;
  border: 1px solid var(--color-border);
  background: #0f172a;
}

.comparison-views {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1px;
  background: var(--color-border);
}

.comparison-pane {
  position: relative;
  background: #0f172a;
  padding: 0.5rem;
  text-align: center;
}

.comparison-pane img {
  max-width: 100%;
  max-height: 400px;
  object-fit: contain;
  display: block;
  margin: 0 auto;
  border-radius: var(--radius-sm);
}

.comparison-label {
  position: absolute;
  top: 12px;
  left: 12px;
  background: rgba(15, 23, 42, 0.85);
  color: #ffffff;
  font-size: 0.75rem;
  font-weight: 700;
  padding: 0.25rem 0.6rem;
  border-radius: var(--radius-sm);
  letter-spacing: 0.05em;
  text-transform: uppercase;
  backdrop-filter: blur(4px);
}