/* ==========================================================================
   ImageTools Pro — Design System & Main Stylesheet
   Modern, Fast, Accessible, Pure Vanilla CSS with Dark/Light Mode
   ========================================================================== */

:root {
  /* Color Palette - Light Theme */
  --bg-primary: #f8fafc;
  --bg-surface: #ffffff;
  --bg-surface-alt: #f1f5f9;
  --bg-glass: rgba(255, 255, 255, 0.85);
  --border-subtle: #e2e8f0;
  --border-strong: #cbd5e1;
  --text-primary: #0f172a;
  --text-secondary: #475569;
  --text-muted: #64748b;
  --text-inverse: #ffffff;

  /* Accent Colors */
  --primary: #4f46e5;
  --primary-hover: #4338ca;
  --primary-light: #eef2ff;
  --primary-glow: rgba(79, 70, 229, 0.2);

  --accent: #06b6d4;
  --accent-light: #ecfeff;

  --success: #10b981;
  --success-bg: #ecfdf5;
  --success-border: #a7f3d0;
  --success-text: #065f46;

  --warning: #f59e0b;
  --warning-bg: #fffbeb;
  --warning-border: #fde68a;
  --warning-text: #92400e;

  --danger: #ef4444;
  --danger-bg: #fef2f2;
  --danger-border: #fecaca;
  --danger-text: #991b1b;

  /* Layout & Spacing */
  --max-width: 1240px;
  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 16px;
  --radius-xl: 24px;
  --radius-pill: 9999px;

  /* Shadows */
  --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.08), 0 2px 4px -2px rgba(0, 0, 0, 0.05);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.08), 0 4px 6px -4px rgba(0, 0, 0, 0.05);
  --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 8px 10px -6px rgba(0, 0, 0, 0.06);

  /* Typography */
  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif, "Apple Color Emoji", "Segoe UI Emoji";
  --font-mono: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", "Courier New", monospace;
  --transition-fast: 0.15s ease;
  --transition-normal: 0.25s ease;
}

/* Dark Theme */
[data-theme="dark"] {
  --bg-primary: #0b0f19;
  --bg-surface: #131b2e;
  --bg-surface-alt: #1e293b;
  --bg-glass: rgba(19, 27, 46, 0.85);
  --border-subtle: #1e293b;
  --border-strong: #334155;
  --text-primary: #f8fafc;
  --text-secondary: #cbd5e1;
  --text-muted: #94a3b8;
  --text-inverse: #0f172a;

  --primary: #6366f1;
  --primary-hover: #818cf8;
  --primary-light: rgba(99, 102, 241, 0.15);
  --primary-glow: rgba(99, 102, 241, 0.35);

  --accent: #22d3ee;
  --accent-light: rgba(34, 211, 238, 0.15);

  --success-bg: rgba(16, 185, 129, 0.15);
  --success-border: rgba(16, 185, 129, 0.3);
  --success-text: #34d399;

  --warning-bg: rgba(245, 158, 11, 0.15);
  --warning-border: rgba(245, 158, 11, 0.3);
  --warning-text: #fbbf24;

  --danger-bg: rgba(239, 68, 68, 0.15);
  --danger-border: rgba(239, 68, 68, 0.3);
  --danger-text: #f87171;

  --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.3);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.4), 0 2px 4px -2px rgba(0, 0, 0, 0.3);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.5), 0 4px 6px -4px rgba(0, 0, 0, 0.4);
  --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.6), 0 8px 10px -6px rgba(0, 0, 0, 0.5);
}

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

html {
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.5;
  color: var(--text-primary);
  background-color: var(--bg-primary);
  scroll-behavior: smooth;
  text-rendering: optimizeLegibility;
  -webkit-font-smoothing: antialiased;
}

body {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  overflow-x: hidden;
  background-color: var(--bg-primary);
}

img, svg, video, canvas {
  display: block;
  max-width: 100%;
}

input, button, textarea, select {
  font: inherit;
  color: inherit;
}

button {
  cursor: pointer;
  border: none;
  background: none;
}

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

a:hover {
  text-decoration: underline;
}

:focus-visible {
  outline: 2px solid var(--primary);
  outline-offset: 2px;
}

/* ==========================================================================
   Container & Layout Grid
   ========================================================================== */
.container {
  width: 100%;
  max-width: var(--max-width);
  margin-left: auto;
  margin-right: auto;
  padding-left: 1.25rem;
  padding-right: 1.25rem;
}

.main-content {
  flex: 1 0 auto;
}

/* ==========================================================================
   Header & Navigation
   ========================================================================== */
.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background-color: var(--bg-glass);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border-subtle);
  transition: background-color var(--transition-normal);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 4.25rem;
}

.brand-link {
  display: flex;
  align-items: center;
  gap: 0.65rem;
  font-size: 1.25rem;
  font-weight: 800;
  color: var(--text-primary);
  text-decoration: none;
  letter-spacing: -0.02em;
}

.brand-link:hover {
  text-decoration: none;
}

.brand-icon {
  width: 34px;
  height: 34px;
  border-radius: var(--radius-sm);
}

.brand-pro-tag {
  background: linear-gradient(135deg, var(--primary), var(--accent));
  color: #fff;
  font-size: 0.65rem;
  font-weight: 800;
  letter-spacing: 0.05em;
  padding: 0.15rem 0.45rem;
  border-radius: var(--radius-pill);
  text-transform: uppercase;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 1.5rem;
  list-style: none;
}

.nav-link {
  color: var(--text-secondary);
  font-weight: 500;
  font-size: 0.95rem;
  transition: color var(--transition-fast);
}

.nav-link:hover, .nav-link.active {
  color: var(--primary);
  text-decoration: none;
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.theme-toggle-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  border-radius: var(--radius-md);
  color: var(--text-secondary);
  background: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  transition: all var(--transition-fast);
}

.theme-toggle-btn:hover {
  color: var(--primary);
  border-color: var(--primary);
  background: var(--primary-light);
}

.menu-toggle-btn {
  display: none;
  width: 40px;
  height: 40px;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-md);
  color: var(--text-secondary);
  border: 1px solid var(--border-subtle);
  background: var(--bg-surface);
}

/* Mobile Nav Drawer */
.mobile-nav {
  display: none;
  position: fixed;
  top: 4.25rem;
  left: 0;
  right: 0;
  bottom: 0;
  background-color: var(--bg-surface);
  border-bottom: 1px solid var(--border-subtle);
  padding: 1.5rem;
  z-index: 49;
  overflow-y: auto;
}

.mobile-nav.open {
  display: block;
}

.mobile-nav-links {
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
  list-style: none;
}

.mobile-nav-link {
  font-size: 1.1rem;
  font-weight: 600;
  color: var(--text-primary);
  display: block;
  padding: 0.5rem 0;
  border-bottom: 1px solid var(--border-subtle);
}

/* ==========================================================================
   Hero Section
   ========================================================================== */
.hero-section {
  padding: 4rem 0 2.5rem;
  text-align: center;
  background: radial-gradient(circle at top, var(--primary-light) 0%, transparent 70%);
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  background: var(--bg-surface);
  border: 1px solid var(--border-strong);
  padding: 0.4rem 1rem;
  border-radius: var(--radius-pill);
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--primary);
  margin-bottom: 1.5rem;
  box-shadow: var(--shadow-sm);
}

.hero-badge .pulse-dot {
  width: 8px;
  height: 8px;
  background-color: var(--success);
  border-radius: 50%;
  animation: pulse 2s infinite;
}

@keyframes pulse {
  0% { transform: scale(0.95); box-shadow: 0 0 0 0 rgba(16, 185, 129, 0.7); }
  70% { transform: scale(1); box-shadow: 0 0 0 6px rgba(16, 185, 129, 0); }
  100% { transform: scale(0.95); box-shadow: 0 0 0 0 rgba(16, 185, 129, 0); }
}

.hero-title {
  font-size: clamp(2rem, 4.5vw, 3.25rem);
  font-weight: 800;
  line-height: 1.15;
  letter-spacing: -0.03em;
  margin-bottom: 1.25rem;
  color: var(--text-primary);
}

.hero-title .gradient-text {
  background: linear-gradient(135deg, var(--primary) 0%, var(--accent) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.hero-subtitle {
  font-size: clamp(1rem, 2vw, 1.2rem);
  color: var(--text-secondary);
  max-width: 720px;
  margin: 0 auto 2rem;
  line-height: 1.6;
}

.hero-cta-group {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 1rem;
  flex-wrap: wrap;
  margin-bottom: 2.5rem;
}

/* Trust Features Grid */
.trust-features {
  display: flex;
  justify-content: center;
  gap: 1.5rem;
  flex-wrap: wrap;
  padding: 1.25rem;
  background: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  max-width: 960px;
  margin: 0 auto;
  box-shadow: var(--shadow-sm);
}

.trust-item {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--text-secondary);
}

.trust-item svg {
  color: var(--success);
  width: 18px;
  height: 18px;
  flex-shrink: 0;
}

/* ==========================================================================
   Tool Cards Grid (Homepage)
   ========================================================================== */
.tools-section {
  padding: 3.5rem 0 5rem;
}

.section-header {
  text-align: center;
  margin-bottom: 3rem;
}

.section-title {
  font-size: 2rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  margin-bottom: 0.5rem;
}

.section-desc {
  color: var(--text-secondary);
  font-size: 1.05rem;
  max-width: 600px;
  margin: 0 auto;
}

.tools-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 1.5rem;
}

.tool-card {
  background: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: 1.75rem;
  display: flex;
  flex-direction: column;
  text-decoration: none;
  color: inherit;
  transition: transform var(--transition-normal), box-shadow var(--transition-normal), border-color var(--transition-normal);
  position: relative;
  overflow: hidden;
}

.tool-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
  border-color: var(--primary);
  text-decoration: none;
}

.tool-card-icon {
  width: 52px;
  height: 52px;
  border-radius: var(--radius-md);
  background: var(--primary-light);
  color: var(--primary);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 1.25rem;
  transition: transform var(--transition-fast);
}

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

.tool-card-icon svg {
  width: 28px;
  height: 28px;
}

.tool-card-title {
  font-size: 1.2rem;
  font-weight: 700;
  margin-bottom: 0.5rem;
  color: var(--text-primary);
}

.tool-card-desc {
  font-size: 0.9rem;
  color: var(--text-secondary);
  line-height: 1.5;
  margin-bottom: 1.25rem;
  flex-grow: 1;
}

.tool-card-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--primary);
}

.tool-card-badge {
  font-size: 0.72rem;
  padding: 0.2rem 0.5rem;
  border-radius: var(--radius-pill);
  background: var(--bg-surface-alt);
  color: var(--text-muted);
  border: 1px solid var(--border-subtle);
}

/* ==========================================================================
   Tool Page Layout & Workspace
   ========================================================================== */
.tool-page-header {
  padding: 2.5rem 0 1.5rem;
  text-align: center;
}

.breadcrumbs {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  font-size: 0.85rem;
  color: var(--text-muted);
  margin-bottom: 1rem;
  flex-wrap: wrap;
}

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

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

.breadcrumbs .sep {
  opacity: 0.5;
}

.tool-page-title {
  font-size: clamp(1.8rem, 3.5vw, 2.6rem);
  font-weight: 800;
  margin-bottom: 0.6rem;
  letter-spacing: -0.02em;
}

.tool-page-subtitle {
  color: var(--text-secondary);
  font-size: 1.05rem;
  max-width: 680px;
  margin: 0 auto;
}

/* Main Two-Column Tool Workspace */
.tool-workspace {
  display: grid;
  grid-template-columns: 380px 1fr;
  gap: 1.75rem;
  margin: 1.5rem 0 3rem;
  align-items: start;
}

@media (max-width: 960px) {
  .tool-workspace {
    grid-template-columns: 1fr;
  }
}

.tool-panel {
  background: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: 1.5rem;
  box-shadow: var(--shadow-sm);
}

.panel-title {
  font-size: 1.1rem;
  font-weight: 700;
  margin-bottom: 1.25rem;
  padding-bottom: 0.75rem;
  border-bottom: 1px solid var(--border-subtle);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

/* Upload Dropzone */
.dropzone {
  border: 2px dashed var(--border-strong);
  border-radius: var(--radius-md);
  padding: 2.25rem 1.5rem;
  text-align: center;
  background: var(--bg-surface-alt);
  cursor: pointer;
  transition: all var(--transition-fast);
  position: relative;
  outline: none;
}

.dropzone:hover, .dropzone.dragover {
  border-color: var(--primary);
  background: var(--primary-light);
  transform: scale(0.995);
}

.dropzone-icon {
  width: 48px;
  height: 48px;
  margin: 0 auto 0.75rem;
  color: var(--primary);
}

.dropzone-title {
  font-size: 1rem;
  font-weight: 700;
  margin-bottom: 0.35rem;
  color: var(--text-primary);
}

.dropzone-hint {
  font-size: 0.8rem;
  color: var(--text-muted);
  margin-bottom: 1rem;
}

.dropzone-formats {
  display: inline-block;
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--primary);
  background: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  padding: 0.25rem 0.65rem;
  border-radius: var(--radius-pill);
}

.file-input-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  border: 0;
}

/* File Information Strip */
.file-meta-strip {
  display: flex;
  flex-direction: column;
  gap: 0.65rem;
  background: var(--bg-surface-alt);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 1rem;
  margin-top: 1.25rem;
  font-size: 0.85rem;
}

.file-meta-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.file-meta-label {
  color: var(--text-muted);
}

.file-meta-val {
  font-weight: 600;
  color: var(--text-primary);
  font-family: var(--font-mono);
}

/* Form Controls & Groups */
.control-group {
  margin-top: 1.25rem;
}

.control-label {
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--text-secondary);
  margin-bottom: 0.45rem;
}

.control-input, .control-select {
  width: 100%;
  padding: 0.65rem 0.85rem;
  border: 1px solid var(--border-strong);
  border-radius: var(--radius-sm);
  background-color: var(--bg-surface);
  color: var(--text-primary);
  font-size: 0.95rem;
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}

.control-input:focus, .control-select:focus {
  border-color: var(--primary);
  box-shadow: 0 0 0 3px var(--primary-light);
  outline: none;
}

.input-with-addon {
  display: flex;
}

.input-with-addon .control-input {
  border-top-right-radius: 0;
  border-bottom-right-radius: 0;
}

.input-addon {
  padding: 0 0.85rem;
  background: var(--bg-surface-alt);
  border: 1px solid var(--border-strong);
  border-left: none;
  border-top-right-radius: var(--radius-sm);
  border-bottom-right-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  font-size: 0.85rem;
  color: var(--text-muted);
  font-weight: 600;
}

/* Presets Pills */
.preset-chips {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
  margin-top: 0.5rem;
}

.chip-btn {
  font-size: 0.78rem;
  font-weight: 600;
  padding: 0.35rem 0.7rem;
  border-radius: var(--radius-pill);
  background: var(--bg-surface-alt);
  border: 1px solid var(--border-subtle);
  color: var(--text-secondary);
  transition: all var(--transition-fast);
}

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

.chip-btn.active {
  background: var(--primary);
  color: #fff;
  border-color: var(--primary);
}

/* Range Slider */
.slider-container {
  display: flex;
  align-items: center;
  gap: 1rem;
}

.range-slider {
  flex-grow: 1;
  accent-color: var(--primary);
  height: 6px;
  cursor: pointer;
}

.slider-val {
  font-family: var(--font-mono);
  font-size: 0.9rem;
  font-weight: 700;
  min-width: 48px;
  text-align: right;
  color: var(--primary);
}

/* Checkbox & Switch */
.switch-group {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.65rem 0;
  cursor: pointer;
}

.switch-label {
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--text-primary);
}

.checkbox-custom {
  width: 18px;
  height: 18px;
  accent-color: var(--primary);
  cursor: pointer;
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.75rem 1.4rem;
  font-size: 0.95rem;
  font-weight: 600;
  border-radius: var(--radius-md);
  transition: all var(--transition-fast);
  text-decoration: none;
  cursor: pointer;
}

.btn:hover {
  text-decoration: none;
}

.btn-primary {
  background: var(--primary);
  color: #ffffff;
  box-shadow: 0 2px 4px var(--primary-glow);
}

.btn-primary:hover {
  background: var(--primary-hover);
  box-shadow: 0 4px 10px var(--primary-glow);
}

.btn-primary:disabled {
  opacity: 0.6;
  cursor: not-allowed;
  filter: grayscale(0.5);
}

.btn-secondary {
  background: var(--bg-surface-alt);
  color: var(--text-primary);
  border: 1px solid var(--border-strong);
}

.btn-secondary:hover {
  background: var(--border-subtle);
}

.btn-outline {
  border: 1px solid var(--primary);
  color: var(--primary);
  background: transparent;
}

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

.btn-block {
  width: 100%;
}

.btn-group {
  display: flex;
  gap: 0.75rem;
}

/* Preview Canvas Area */
.preview-panel {
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
}

.preview-container {
  background: repeating-conic-gradient(var(--border-subtle) 0% 25%, transparent 0% 50%) 50% / 16px 16px;
  background-color: var(--bg-surface-alt);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  min-height: 380px;
  max-height: 580px;
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  overflow: hidden;
  padding: 1rem;
}

.preview-img {
  max-width: 100%;
  max-height: 520px;
  object-fit: contain;
  box-shadow: var(--shadow-md);
  border-radius: var(--radius-sm);
  transition: transform var(--transition-fast);
}

.preview-empty-state {
  text-align: center;
  color: var(--text-muted);
}

.preview-empty-state svg {
  width: 56px;
  height: 56px;
  margin: 0 auto 0.75rem;
  opacity: 0.4;
}

/* Stats Comparison Bar */
.stats-bar {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
  gap: 1rem;
  background: var(--bg-surface-alt);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 1rem;
}

.stat-item {
  display: flex;
  flex-direction: column;
}

.stat-label {
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--text-muted);
  font-weight: 600;
  margin-bottom: 0.2rem;
}

.stat-value {
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--text-primary);
  font-family: var(--font-mono);
}

.stat-highlight {
  color: var(--success);
}

.stat-warning {
  color: var(--warning-text);
}

/* Alerts and Banners */
.alert-box {
  padding: 0.9rem 1.15rem;
  border-radius: var(--radius-md);
  font-size: 0.88rem;
  line-height: 1.5;
  display: flex;
  align-items: flex-start;
  gap: 0.75rem;
  margin-top: 1rem;
}

.alert-info {
  background: var(--primary-light);
  border: 1px solid var(--primary);
  color: var(--primary);
}

.alert-warning {
  background: var(--warning-bg);
  border: 1px solid var(--warning-border);
  color: var(--warning-text);
}

.alert-success {
  background: var(--success-bg);
  border: 1px solid var(--success-border);
  color: var(--success-text);
}

.alert-danger {
  background: var(--danger-bg);
  border: 1px solid var(--danger-border);
  color: var(--danger-text);
}

.alert-box svg {
  width: 20px;
  height: 20px;
  flex-shrink: 0;
  margin-top: 0.15rem;
}

/* Interactive Cropper */
.cropper-stage {
  position: relative;
  display: inline-block;
  user-select: none;
  touch-action: none;
  max-width: 100%;
}

.crop-overlay {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(0, 0, 0, 0.55);
}

.crop-box {
  position: absolute;
  border: 2px solid #ffffff;
  box-shadow: 0 0 0 9999px rgba(0, 0, 0, 0.6);
  cursor: move;
  touch-action: none;
}

.crop-handle {
  position: absolute;
  width: 14px;
  height: 14px;
  background: #ffffff;
  border: 2px solid var(--primary);
  border-radius: 50%;
}

.crop-handle.tl { top: -7px; left: -7px; cursor: nwse-resize; }
.crop-handle.tr { top: -7px; right: -7px; cursor: nesw-resize; }
.crop-handle.bl { bottom: -7px; left: -7px; cursor: nesw-resize; }
.crop-handle.br { bottom: -7px; right: -7px; cursor: nwse-resize; }

/* Signature Pad Canvas */
.signature-canvas-wrapper {
  background: #ffffff;
  border: 2px solid var(--border-strong);
  border-radius: var(--radius-md);
  position: relative;
  touch-action: none;
  cursor: crosshair;
  overflow: hidden;
}

.signature-canvas {
  display: block;
  width: 100%;
  height: 220px;
  background: #ffffff;
}

.signature-tools {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.5rem;
  margin-top: 0.75rem;
  flex-wrap: wrap;
}

/* Batch Processing Table */
.batch-table-container {
  overflow-x: auto;
  margin-top: 1rem;
}

.batch-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.85rem;
  text-align: left;
}

.batch-table th {
  background: var(--bg-surface-alt);
  padding: 0.75rem;
  font-weight: 700;
  border-bottom: 2px solid var(--border-subtle);
  color: var(--text-secondary);
}

.batch-table td {
  padding: 0.75rem;
  border-bottom: 1px solid var(--border-subtle);
  vertical-align: middle;
}

.batch-thumb {
  width: 44px;
  height: 44px;
  object-fit: cover;
  border-radius: var(--radius-sm);
  background: var(--bg-surface-alt);
}

.badge-status {
  padding: 0.2rem 0.5rem;
  border-radius: var(--radius-pill);
  font-size: 0.75rem;
  font-weight: 600;
}

.badge-pending { background: var(--bg-surface-alt); color: var(--text-muted); }
.badge-processing { background: var(--warning-bg); color: var(--warning-text); }
.badge-done { background: var(--success-bg); color: var(--success-text); }

/* Progress Bar */
.progress-bar-container {
  width: 100%;
  height: 8px;
  background: var(--bg-surface-alt);
  border-radius: var(--radius-pill);
  overflow: hidden;
  margin: 1rem 0;
  display: none;
}

.progress-bar-fill {
  height: 100%;
  width: 0%;
  background: linear-gradient(90deg, var(--primary), var(--accent));
  transition: width 0.2s ease;
}

/* ==========================================================================
   Dedicated Non-Intrusive Ad Slots
   Clean placeholder styling for AdSense / Adsterra
   ========================================================================== */
.ad-slot {
  background: var(--bg-surface);
  border: 1px dashed var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 0.75rem;
  text-align: center;
  position: relative;
  overflow: hidden;
  margin: 1.5rem auto;
}

.ad-slot-label {
  font-size: 0.65rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--text-muted);
  margin-bottom: 0.4rem;
}

.ad-slot-banner {
  min-height: 90px;
  max-width: 728px;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
}

.ad-slot-sidebar {
  min-height: 250px;
  width: 100%;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
}

.ad-slot-inline {
  min-height: 90px;
  max-width: 900px;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
}

/* ==========================================================================
   SEO Content & Article Styling
   ========================================================================== */
.seo-content-section {
  padding: 3rem 0;
  border-top: 1px solid var(--border-subtle);
  background: var(--bg-surface);
  border-radius: var(--radius-lg);
  margin-top: 3rem;
}

.seo-content-grid {
  display: grid;
  grid-template-columns: 2fr 1fr;
  gap: 2.5rem;
}

@media (max-width: 960px) {
  .seo-content-grid {
    grid-template-columns: 1fr;
  }
}

.prose h2 {
  font-size: 1.5rem;
  font-weight: 800;
  margin: 2rem 0 0.85rem;
  color: var(--text-primary);
  letter-spacing: -0.02em;
}

.prose h2:first-child {
  margin-top: 0;
}

.prose h3 {
  font-size: 1.18rem;
  font-weight: 700;
  margin: 1.5rem 0 0.65rem;
  color: var(--text-primary);
}

.prose p {
  font-size: 0.98rem;
  color: var(--text-secondary);
  line-height: 1.7;
  margin-bottom: 1.15rem;
}

.prose ul, .prose ol {
  margin: 0 0 1.25rem 1.5rem;
  color: var(--text-secondary);
}

.prose li {
  margin-bottom: 0.4rem;
  line-height: 1.6;
}

/* FAQ Accordion */
.faq-accordion {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  margin-top: 1.25rem;
}

.faq-item {
  background: var(--bg-primary);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  overflow: hidden;
  transition: border-color var(--transition-fast);
}

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

.faq-summary {
  padding: 1rem 1.25rem;
  font-weight: 600;
  font-size: 1rem;
  cursor: pointer;
  display: flex;
  justify-content: space-between;
  align-items: center;
  list-style: none;
  user-select: none;
}

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

.faq-summary::after {
  content: "+";
  font-size: 1.35rem;
  font-weight: 400;
  color: var(--primary);
  transition: transform var(--transition-fast);
}

.faq-item[open] .faq-summary::after {
  content: "−";
}

.faq-answer {
  padding: 0 1.25rem 1.25rem;
  font-size: 0.95rem;
  color: var(--text-secondary);
  line-height: 1.6;
}

/* Related Tools Strip */
.related-tools-strip {
  margin-top: 3.5rem;
}

.related-title {
  font-size: 1.35rem;
  font-weight: 700;
  margin-bottom: 1.25rem;
}

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

.related-card {
  display: flex;
  align-items: center;
  gap: 0.85rem;
  background: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 1rem;
  color: inherit;
  font-weight: 600;
  font-size: 0.9rem;
  transition: all var(--transition-fast);
}

.related-card:hover {
  border-color: var(--primary);
  transform: translateY(-2px);
  color: var(--primary);
  text-decoration: none;
}

/* ==========================================================================
   Footer
   ========================================================================== */
.site-footer {
  background-color: var(--bg-surface);
  border-top: 1px solid var(--border-subtle);
  padding: 4rem 0 2rem;
  margin-top: 4rem;
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 2.5rem;
  margin-bottom: 3rem;
}

@media (max-width: 860px) {
  .footer-grid {
    grid-template-columns: 1fr 1fr;
  }
}

@media (max-width: 520px) {
  .footer-grid {
    grid-template-columns: 1fr;
  }
}

.footer-brand p {
  color: var(--text-muted);
  font-size: 0.9rem;
  margin-top: 0.75rem;
  line-height: 1.6;
  max-width: 320px;
}

.footer-col-title {
  font-size: 0.95rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--text-primary);
  margin-bottom: 1.25rem;
}

.footer-links {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0.7rem;
}

.footer-links a {
  color: var(--text-secondary);
  font-size: 0.9rem;
  transition: color var(--transition-fast);
}

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

.footer-bottom {
  padding-top: 2rem;
  border-top: 1px solid var(--border-subtle);
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 1rem;
  font-size: 0.85rem;
  color: var(--text-muted);
}

.footer-disclaimer-notice {
  font-size: 0.8rem;
  color: var(--text-muted);
  line-height: 1.5;
  background: var(--bg-surface-alt);
  padding: 0.85rem 1.25rem;
  border-radius: var(--radius-md);
  margin-bottom: 2rem;
}

/* ==========================================================================
   Toast Notification System
   ========================================================================== */
.toast-container {
  position: fixed;
  bottom: 1.5rem;
  right: 1.5rem;
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  z-index: 1000;
  pointer-events: none;
}

.toast {
  background: var(--bg-surface);
  border: 1px solid var(--border-strong);
  box-shadow: var(--shadow-xl);
  border-radius: var(--radius-md);
  padding: 0.9rem 1.25rem;
  display: flex;
  align-items: center;
  gap: 0.75rem;
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--text-primary);
  pointer-events: auto;
  animation: toastSlideIn 0.25s cubic-bezier(0.16, 1, 0.3, 1);
  max-width: 380px;
}

.toast.toast-error {
  border-left: 4px solid var(--danger);
}

.toast.toast-success {
  border-left: 4px solid var(--success);
}

.toast.toast-info {
  border-left: 4px solid var(--primary);
}

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

/* Responsive adjustments */
@media (max-width: 768px) {
  .nav-links {
    display: none;
  }
  .menu-toggle-btn {
    display: flex;
  }
  .hero-section {
    padding: 2.5rem 0 2rem;
  }
}