/* 
 * Real Image Resizer - Premium Stylesheet
 * Inspired by Vercel Design Language (Stark ink & canvas, mesh gradients, high typographic contrast)
 */

@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;700&family=JetBrains+Mono:wght@400;500&display=swap');

:root {
  /* Colors - Highly Curated SaaS Slate & Indigo Palette */
  --color-primary: #0f172a;
  --color-on-primary: #ffffff;
  --color-ink: #0f172a;
  --color-body: #475569;
  --color-mute: #94a3b8;
  --color-hairline: #e2e8f0;
  --color-hairline-strong: #cbd5e1;
  --color-canvas: #ffffff;
  --color-canvas-soft: #f8fafc;
  --color-canvas-soft-2: #f1f5f9;
  --color-header-bg: rgba(255, 255, 255, 0.85);
  --color-link: #3b82f6;
  --color-link-deep: #2563eb;
  --color-success: #10b981;
  --color-success-soft: #d1fae5;
  --color-error: #ef4444;
  --color-error-soft: rgba(239, 68, 68, 0.08);
  --color-warning: #f5a623;
  --color-warning-soft: #ffefcf;

  /* Accent Gradient Stops */
  --gradient-develop-start: #3b82f6;
  --gradient-develop-end: #06b6d4;
  --gradient-preview-start: #8b5cf6;
  --gradient-preview-end: #ec4899;
  --gradient-ship-start: #f43f5e;
  --gradient-ship-end: #eab308;

  /* Typography */
  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  --font-mono: 'JetBrains Mono', ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;

  /* Spacing */
  --spacing-xxs: 4px;
  --spacing-xs: 8px;
  --spacing-sm: 12px;
  --spacing-md: 16px;
  --spacing-lg: 24px;
  --spacing-xl: 32px;
  --spacing-2xl: 40px;
  --spacing-3xl: 48px;
  --spacing-4xl: 64px;
  --spacing-5xl: 96px;
  --spacing-6xl: 128px;

  /* Border Radius */
  --rounded-none: 0px;
  --rounded-xs: 4px;
  --rounded-sm: 6px;
  --rounded-md: 8px;
  --rounded-lg: 12px;
  --rounded-xl: 16px;
  --rounded-pill-sm: 64px;
  --rounded-pill: 100px;
  --rounded-full: 9999px;

  /* Transitions */
  --transition-fast: 0.12s ease;
  --transition-normal: 0.22s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-slow: 0.35s cubic-bezier(0.4, 0, 0.2, 1);
}

:root.dark, html.dark {
  --color-primary: #ffffff;
  --color-on-primary: #020617;
  --color-ink: #f8fafc;
  --color-body: #94a3b8;
  --color-mute: #64748b;
  --color-hairline: #1e293b;
  --color-hairline-strong: #334155;
  --color-canvas: #090d16;
  --color-canvas-soft: #020617;
  --color-canvas-soft-2: #0f172a;
  --color-header-bg: rgba(2, 6, 23, 0.85);
  --color-success-soft: rgba(16, 185, 129, 0.12);
  --color-warning-soft: rgba(245, 166, 35, 0.12);
}

/* Reset & Base Styles */
* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  font-family: var(--font-sans);
  background-color: var(--color-canvas-soft);
  color: var(--color-ink);
  line-height: 1.5;
  font-size: 16px;
  overflow-x: hidden;
}

/* Typography Scale */
h1, h2, h3, h4 {
  font-weight: 600;
  letter-spacing: -0.03em;
  color: var(--color-ink);
  line-height: 1.25;
}

h1 {
  font-size: clamp(2.5rem, 5vw, 3.5rem);
  letter-spacing: -0.05em;
  margin-bottom: var(--spacing-sm);
}

h2 {
  font-size: clamp(1.8rem, 4vw, 2.2rem);
  letter-spacing: -0.04em;
  margin-bottom: var(--spacing-md);
}

h3 {
  font-size: 1.5rem;
  letter-spacing: -0.03em;
  margin-bottom: var(--spacing-xs);
}

p {
  color: var(--color-body);
  font-size: 1rem;
  line-height: 1.6;
}

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

a:hover {
  color: var(--color-link-deep);
}

.caption-mono {
  font-family: var(--font-mono);
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--color-mute);
}

/* Layout Utilities */
.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 var(--spacing-lg);
  position: relative;
}

section {
  padding: var(--spacing-4xl) 0;
  scroll-margin-top: 80px;
}

/* Elevations & Card Chrome */
.card {
  background-color: var(--color-canvas);
  border: 1px solid var(--color-hairline);
  border-radius: var(--rounded-lg);
  padding: var(--spacing-lg);
  box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.05), 0 2px 4px -1px rgba(0, 0, 0, 0.02);
  transition: transform var(--transition-normal), box-shadow var(--transition-normal), border-color var(--transition-normal);
}

.card:hover {
  transform: translateY(-2px);
  box-shadow: 0 12px 20px -8px rgba(0, 0, 0, 0.08), 0 4px 8px -2px rgba(0, 0, 0, 0.03);
  border-color: var(--color-hairline-strong);
}

/* Decorative Mesh Backgrounds */
.mesh-gradient-bg {
  position: absolute;
  top: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 100%;
  max-width: 1400px;
  height: 600px;
  background: 
    radial-gradient(circle at 15% 20%, rgba(0, 124, 240, 0.12) 0%, transparent 40%),
    radial-gradient(circle at 85% 15%, rgba(121, 40, 202, 0.12) 0%, transparent 45%),
    radial-gradient(circle at 50% 60%, rgba(255, 77, 77, 0.08) 0%, transparent 50%),
    radial-gradient(circle at 75% 70%, rgba(249, 203, 40, 0.06) 0%, transparent 40%);
  z-index: 0;
  pointer-events: none;
}

:root.dark .mesh-gradient-bg {
  background: 
    radial-gradient(circle at 15% 20%, rgba(0, 124, 240, 0.08) 0%, transparent 40%),
    radial-gradient(circle at 85% 15%, rgba(121, 40, 202, 0.08) 0%, transparent 45%),
    radial-gradient(circle at 50% 60%, rgba(255, 77, 77, 0.05) 0%, transparent 50%),
    radial-gradient(circle at 75% 70%, rgba(249, 203, 40, 0.04) 0%, transparent 40%);
}

/* Header & Nav */
.header {
  position: sticky;
  top: 0;
  width: 100%;
  background-color: var(--color-header-bg);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--color-hairline);
  height: 64px;
  z-index: 100;
  display: flex;
  align-items: center;
}

.header .container {
  width: 100%;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.logo {
  display: flex;
  align-items: center;
  gap: var(--spacing-xs);
  font-weight: 700;
  font-size: 1.15rem;
  letter-spacing: -0.04em;
  color: var(--color-ink);
}

.logo svg {
  color: var(--color-primary);
  transform: rotate(-10deg);
  transition: var(--transition-fast);
}

.logo:hover svg {
  transform: rotate(0deg);
}

.nav-links {
  display: flex;
  align-items: center;
  gap: var(--spacing-md);
}

.nav-link {
  font-size: 14px;
  font-weight: 500;
  color: var(--color-body);
  padding: var(--spacing-xs) var(--spacing-sm);
  border-radius: var(--rounded-pill-sm);
  transition: var(--transition-fast);
}

.nav-link:hover {
  background-color: var(--color-canvas-soft-2);
  color: var(--color-ink);
}



/* Hamburger / Mobile menu button */
.menu-toggle {
  display: none;
  background: none;
  border: none;
  color: var(--color-ink);
  cursor: pointer;
  padding: var(--spacing-xs);
}

/* Hero Section */
.hero-section {
  position: relative;
  text-align: center;
  padding: var(--spacing-5xl) 0 var(--spacing-xl);
  z-index: 1;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: var(--spacing-xs);
  background-color: var(--color-canvas);
  border: 1px solid var(--color-hairline);
  padding: var(--spacing-xxs) var(--spacing-sm);
  border-radius: var(--rounded-pill);
  margin-bottom: var(--spacing-lg);
  font-size: 13px;
  font-weight: 500;
  box-shadow: 0px 2px 4px rgba(0,0,0,0.02);
}

.hero-badge span.pulse {
  width: 6px;
  height: 6px;
  background-color: var(--color-success);
  border-radius: 50%;
  animation: pulse-dot 1.8s infinite;
}

@keyframes pulse-dot {
  0% { transform: scale(0.9); opacity: 0.4; }
  50% { transform: scale(1.2); opacity: 1; }
  100% { transform: scale(0.9); opacity: 0.4; }
}

.hero-title {
  max-width: 800px;
  margin: 0 auto var(--spacing-md);
}

.hero-title span {
  background: linear-gradient(135deg, var(--gradient-develop-start), var(--gradient-preview-end));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.hero-subtitle {
  max-width: 600px;
  margin: 0 auto var(--spacing-xl);
  font-size: 1.15rem;
  color: var(--color-body);
}

.hero-ctas {
  display: flex;
  justify-content: center;
  gap: var(--spacing-md);
  margin-bottom: var(--spacing-xl);
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--spacing-xs);
  font-family: var(--font-sans);
  font-weight: 600;
  font-size: 14px;
  padding: 10px 20px;
  border-radius: var(--rounded-md);
  transition: transform var(--transition-normal), background-color var(--transition-normal), box-shadow var(--transition-normal), border-color var(--transition-normal);
  cursor: pointer;
  border: 1px solid transparent;
  outline: none;
  user-select: none;
}

.btn-primary {
  background-color: var(--color-primary);
  color: var(--color-on-primary);
  box-shadow: 0 4px 10px rgba(0, 0, 0, 0.08);
}

.btn-primary:hover {
  filter: brightness(1.08);
  transform: translateY(-1px);
  box-shadow: 0 6px 14px rgba(0, 0, 0, 0.12);
}

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

.btn-secondary {
  background-color: var(--color-canvas);
  color: var(--color-ink);
  border-color: var(--color-hairline-strong);
  box-shadow: 0 1px 2px rgba(0,0,0,0.02);
}

.btn-secondary:hover {
  background-color: var(--color-canvas-soft-2);
  border-color: var(--color-primary);
  transform: translateY(-1px);
  box-shadow: 0 4px 10px rgba(0, 0, 0, 0.04);
}

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

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

/* Privacy micro-banner */
.privacy-badge {
  display: inline-flex;
  align-items: center;
  gap: var(--spacing-xs);
  font-size: 13px;
  color: var(--color-mute);
  justify-content: center;
}

.privacy-badge svg {
  color: var(--color-success);
  width: 14px;
  height: 14px;
}

/* Tool Area / Main Section */
.tool-section {
  position: relative;
  z-index: 2;
  padding-top: var(--spacing-md);
}

/* Mode Switcher Tabs */
.modes-bar {
  display: flex;
  background-color: var(--color-canvas-soft-2);
  border: 1px solid var(--color-hairline);
  padding: var(--spacing-xxs);
  border-radius: var(--rounded-lg);
  gap: var(--spacing-xxs);
  margin-bottom: var(--spacing-lg);
  overflow-x: auto;
  scrollbar-width: none;
}

.modes-bar::-webkit-scrollbar {
  display: none;
}

.mode-tab {
  flex: 1;
  min-width: 100px;
  text-align: center;
  background: none;
  border: none;
  font-family: var(--font-sans);
  font-weight: 500;
  font-size: 14px;
  color: var(--color-body);
  padding: 10px var(--spacing-sm);
  border-radius: var(--rounded-sm);
  cursor: pointer;
  transition: var(--transition-fast);
  white-space: nowrap;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--spacing-xs);
}

.mode-tab svg {
  width: 16px;
  height: 16px;
  opacity: 0.7;
}

.mode-tab:hover {
  color: var(--color-ink);
  background-color: rgba(23, 23, 23, 0.04);
}

.mode-tab.active {
  color: var(--color-primary);
  background-color: var(--color-canvas);
  box-shadow: 0px 1px 2px rgba(0, 0, 0, 0.05);
}

/* Application Container Split-Layout */
.app-container {
  display: grid;
  grid-template-columns: 1.2fr 1fr;
  gap: var(--spacing-lg);
  align-items: start;
}

/* Upload / Preview Box (Left) */
.editor-workspace {
  min-height: 450px;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  background-color: var(--color-canvas);
}

/* Dropzone styling */
.dropzone {
  width: 100%;
  height: 100%;
  min-height: 380px;
  border: 2px dashed var(--color-hairline-strong);
  border-radius: var(--rounded-lg);
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  padding: var(--spacing-xl);
  cursor: pointer;
  transition: border-color var(--transition-normal), background-color var(--transition-normal), box-shadow var(--transition-normal);
  background-color: var(--color-canvas-soft);
  text-align: center;
}

.dropzone:hover, .dropzone.drag-active {
  border-color: var(--color-link);
  background-color: var(--color-canvas-soft-2);
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.02);
}

.dropzone-icon-box {
  width: 64px;
  height: 64px;
  background-color: var(--color-canvas);
  border: 1px solid var(--color-hairline);
  box-shadow: 0 4px 6px -1px rgba(0,0,0,0.05);
  border-radius: var(--rounded-lg);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: var(--spacing-md);
  color: var(--color-body);
  transition: var(--transition-normal);
}

.dropzone:hover .dropzone-icon-box {
  transform: translateY(-4px);
  color: var(--color-primary);
  border-color: var(--color-hairline-strong);
}

.dropzone-title {
  font-size: 18px;
  font-weight: 600;
  margin-bottom: var(--spacing-xs);
}

.dropzone-desc {
  font-size: 14px;
  color: var(--color-mute);
  margin-bottom: var(--spacing-lg);
}

/* Image Preview Grid */
.preview-stage {
  width: 100%;
  display: none;
  flex-direction: column;
  gap: var(--spacing-md);
}

.image-canvas-wrapper {
  position: relative;
  width: 100%;
  max-height: 400px;
  background-color: var(--color-canvas-soft-2);
  border-radius: var(--rounded-md);
  overflow: hidden;
  display: flex;
  align-items: center;
  justify-content: center;
  border: 1px solid var(--color-hairline);
  min-height: 250px;
}

.preview-container {
  position: relative;
  display: inline-block;
  max-width: 100%;
  max-height: 400px;
}

.preview-stage img {
  max-width: 100%;
  max-height: 400px;
  display: block;
  width: auto;
  height: auto;
}

.cropper-overlay {
  display: none;
  position: absolute;
  top: 0;
  left: 0;
  z-index: 5;
  overflow: hidden;
}

/* Crop bounding box visualization */
.crop-box {
  position: absolute;
  border: 2px solid var(--color-on-primary);
  box-shadow: 0 0 0 9999px rgba(0, 0, 0, 0.5); /* Dim surrounding */
  cursor: move;
  box-sizing: border-box;
}

.crop-handle {
  position: absolute;
  width: 12px;
  height: 12px;
  background-color: var(--color-on-primary);
  border: 2px solid var(--color-primary);
  border-radius: 50%;
}

/* Expanded tap target for easier mobile touch manipulation */
.crop-handle::after {
  content: "";
  position: absolute;
  top: -16px;
  left: -16px;
  right: -16px;
  bottom: -16px;
}

.handle-tl { top: -6px; left: -6px; cursor: nwse-resize; }
.handle-tr { top: -6px; right: -6px; cursor: nesw-resize; }
.handle-bl { bottom: -6px; left: -6px; cursor: nesw-resize; }
.handle-br { bottom: -6px; right: -6px; cursor: nwse-resize; }

/* Dimensions indicator */
.canvas-dimensions-badge {
  position: absolute;
  bottom: var(--spacing-sm);
  left: var(--spacing-sm);
  background-color: rgba(23, 23, 23, 0.85);
  color: var(--color-on-primary);
  font-family: var(--font-mono);
  font-size: 11px;
  padding: var(--spacing-xxs) var(--spacing-xs);
  border-radius: var(--rounded-xs);
  backdrop-filter: blur(4px);
  z-index: 6;
}

/* File metadata cards */
.file-meta-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--spacing-md);
}

.meta-pill {
  background-color: var(--color-canvas-soft-2);
  border: 1px solid var(--color-hairline);
  padding: var(--spacing-sm);
  border-radius: var(--rounded-md);
  display: flex;
  flex-direction: column;
}

.meta-pill-label {
  font-size: 11px;
  text-transform: uppercase;
  color: var(--color-mute);
  font-family: var(--font-mono);
  margin-bottom: 2px;
}

.meta-pill-value {
  font-size: 15px;
  font-weight: 600;
  font-family: var(--font-mono);
}

.size-reduced {
  color: var(--color-success);
}

/* Right Panel Settings */
.settings-panel {
  background-color: var(--color-canvas);
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  gap: var(--spacing-lg);
  min-height: 450px;
}

.settings-section-title {
  font-size: 14px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.03em;
  color: var(--color-primary);
  margin-bottom: var(--spacing-sm);
  border-bottom: 1px solid var(--color-hairline);
  padding-bottom: var(--spacing-xxs);
  display: flex;
  align-items: center;
  gap: var(--spacing-xs);
}

.settings-group {
  margin-bottom: var(--spacing-lg);
}

/* Resize Input Options styling */
.resize-tabs {
  display: flex;
  background-color: var(--color-canvas-soft-2);
  border-radius: var(--rounded-sm);
  padding: 2px;
  gap: 2px;
  margin-bottom: var(--spacing-md);
}

.resize-tab-btn {
  flex: 1;
  background: none;
  border: none;
  font-family: var(--font-sans);
  font-size: 13px;
  font-weight: 500;
  padding: 6px var(--spacing-xs);
  color: var(--color-body);
  border-radius: var(--rounded-xs);
  cursor: pointer;
  transition: var(--transition-fast);
}

.resize-tab-btn.active {
  background-color: var(--color-canvas);
  color: var(--color-primary);
  box-shadow: 0 1px 2px rgba(0,0,0,0.03);
}

.input-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--spacing-md);
  margin-bottom: var(--spacing-md);
}

.form-field {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.form-field label {
  font-size: 13px;
  font-weight: 500;
  color: var(--color-body);
}

.input-container-suffix {
  position: relative;
  display: flex;
  align-items: center;
}

.input-container-suffix input {
  width: 100%;
  height: 40px;
  padding: 0 35px 0 var(--spacing-sm);
  border: 1px solid var(--color-hairline-strong);
  border-radius: var(--rounded-sm);
  font-family: var(--font-mono);
  font-size: 14px;
  color: var(--color-ink);
  background-color: var(--color-canvas);
  outline: none;
  transition: var(--transition-fast);
}

.input-container-suffix input:focus {
  border-color: var(--color-primary);
  box-shadow: 0 0 0 2px rgba(0, 0, 0, 0.04);
}

.input-container-suffix input:disabled {
  background-color: var(--color-canvas-soft-2);
  color: var(--color-mute);
  cursor: not-allowed;
}

.input-suffix {
  position: absolute;
  right: var(--spacing-sm);
  font-size: 12px;
  color: var(--color-mute);
  font-family: var(--font-mono);
  pointer-events: none;
}

/* Custom Checkbox Toggle */
.checkbox-label {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  font-size: 14px;
  color: var(--color-body);
  cursor: pointer;
  user-select: none;
}

.checkbox-label input {
  display: none;
}

.custom-checkbox {
  width: 18px;
  height: 18px;
  border: 1px solid var(--color-hairline-strong);
  border-radius: var(--rounded-xs);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  transition: var(--transition-fast);
  background-color: var(--color-canvas);
}

.checkbox-label input:checked + .custom-checkbox {
  background-color: var(--color-primary);
  border-color: var(--color-primary);
}

.checkbox-label input:checked + .custom-checkbox::after {
  content: "";
  width: 4px;
  height: 8px;
  border: solid var(--color-on-primary);
  border-width: 0 2px 2px 0;
  transform: rotate(45deg) translate(-1px, -1px);
}

/* Dropdown preset input */
.preset-select {
  width: 100%;
  height: 40px;
  border: 1px solid var(--color-hairline-strong);
  border-radius: var(--rounded-sm);
  font-family: var(--font-sans);
  font-size: 14px;
  padding: 0 var(--spacing-sm);
  background-color: var(--color-canvas);
  outline: none;
  cursor: pointer;
  transition: var(--transition-fast);
}

.preset-select:focus {
  border-color: var(--color-primary);
}

/* Quality Range Slider */
.range-container {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-xs);
}

.range-header {
  display: flex;
  justify-content: space-between;
  font-size: 13px;
  color: var(--color-body);
}

.range-header span.val {
  font-family: var(--font-mono);
  font-weight: 600;
  color: var(--color-primary);
}

.slider-wrapper {
  display: flex;
  align-items: center;
  gap: var(--spacing-md);
}

input[type="range"].slider {
  -webkit-appearance: none;
  width: 100%;
  height: 6px;
  border-radius: var(--rounded-full);
  background: var(--color-canvas-soft-2);
  outline: none;
  margin: var(--spacing-xs) 0;
}

input[type="range"].slider::-webkit-slider-thumb {
  -webkit-appearance: none;
  width: 18px;
  height: 18px;
  border-radius: 50%;
  background: var(--color-primary);
  cursor: pointer;
  transition: var(--transition-fast);
  border: 2px solid var(--color-canvas);
  box-shadow: 0 2px 4px rgba(0,0,0,0.15);
}

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

/* Output format buttons */
.format-buttons-row {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--spacing-sm);
}

.format-btn {
  background-color: var(--color-canvas);
  border: 1px solid var(--color-hairline-strong);
  color: var(--color-ink); /* Ensure readable unselected text color in both light & dark mode */
  padding: 10px;
  border-radius: var(--rounded-sm);
  font-family: var(--font-mono);
  font-size: 14px;
  font-weight: 500;
  cursor: pointer;
  transition: var(--transition-fast);
  text-align: center;
  outline: none;
}

.format-btn:hover {
  border-color: var(--color-primary);
  background-color: var(--color-canvas-soft-2);
}

.format-btn:focus-visible {
  outline: 2px solid var(--color-link);
  outline-offset: 2px;
}

.format-btn.active {
  background-color: var(--color-primary);
  color: var(--color-on-primary);
  border-color: var(--color-primary);
}

.format-btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
  background-color: var(--color-canvas-soft-2);
  border-color: var(--color-hairline);
  color: var(--color-mute);
}

/* Action button trigger */
.btn-submit {
  width: 100%;
  margin-top: var(--spacing-md);
}

/* Empty State instructions (shown in right side when no image) */
.empty-settings-state {
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  text-align: center;
  padding: var(--spacing-xl);
  color: var(--color-mute);
  height: 100%;
}

.empty-settings-state svg {
  color: var(--color-hairline-strong);
  margin-bottom: var(--spacing-md);
}

/* Mode-specific panel visibility controls */
.mode-panel {
  display: none;
}

.mode-panel.active {
  display: block;
}

/* Crop Aspect Options styling */
.crop-presets-grid {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: var(--spacing-xs);
}

.crop-preset-btn {
  background-color: var(--color-canvas-soft-2);
  border: 1px solid var(--color-hairline);
  color: var(--color-ink);
  border-radius: var(--rounded-sm);
  padding: 8px 4px;
  font-size: 12px;
  font-family: var(--font-sans);
  text-align: center;
  cursor: pointer;
  transition: var(--transition-fast);
}

.crop-preset-btn:hover {
  background-color: var(--color-hairline);
}

.crop-preset-btn.active {
  background-color: var(--color-primary);
  color: var(--color-on-primary);
  border-color: var(--color-primary);
}

:root.dark .crop-preset-btn {
  color: #ffffff;
  background-color: #1a1a1a;
  border-color: #333;
}

:root.dark .crop-preset-btn:hover {
  background-color: #333;
}

:root.dark .crop-preset-btn.active {
  background-color: #ffffff;
  color: #000000;
  border-color: #ffffff;
}

/* Bulk Queue List */
.bulk-queue-container {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-sm);
  max-height: 250px;
  overflow-y: auto;
  margin-bottom: var(--spacing-md);
  border: 1px solid var(--color-hairline);
  padding: var(--spacing-xs);
  border-radius: var(--rounded-md);
  background-color: var(--color-canvas-soft-2);
}

.bulk-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  background-color: var(--color-canvas);
  border: 1px solid var(--color-hairline);
  padding: var(--spacing-xs) var(--spacing-sm);
  border-radius: var(--rounded-sm);
  font-size: 13px;
}

.bulk-item-info {
  display: flex;
  flex-direction: column;
  gap: 2px;
  max-width: 70%;
}

.bulk-item-name {
  font-weight: 500;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.bulk-item-details {
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--color-mute);
}

.bulk-item-remove {
  background: none;
  border: none;
  color: var(--color-error);
  cursor: pointer;
  padding: var(--spacing-xxs);
}

.bulk-item-remove:hover {
  background-color: var(--color-error-soft);
  border-radius: var(--rounded-xs);
}

/* Popular Presets Section */
.presets-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(130px, 1fr));
  gap: var(--spacing-md);
  margin-top: var(--spacing-xl);
}

.preset-card {
  background-color: var(--color-canvas);
  border: 1px solid var(--color-hairline);
  border-radius: var(--rounded-md);
  padding: var(--spacing-md);
  text-align: center;
  cursor: pointer;
  transition: var(--transition-normal);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--spacing-xs);
}

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

.preset-icon {
  width: 36px;
  height: 36px;
  border-radius: var(--rounded-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  background-color: var(--color-canvas-soft-2);
  color: var(--color-body);
}

.preset-card:hover .preset-icon {
  background-color: var(--color-primary);
  color: var(--color-on-primary);
}

.preset-name {
  font-size: 14px;
  font-weight: 600;
}

.preset-dims {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--color-mute);
}

/* How It Works Section */
.how-it-works-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--spacing-xl);
  margin-top: var(--spacing-2xl);
}

.step-card {
  position: relative;
  text-align: center;
}

.step-number {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background-color: var(--color-primary);
  color: var(--color-on-primary);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-mono);
  font-weight: 600;
  font-size: 16px;
  margin-bottom: var(--spacing-md);
  border: 4px solid var(--color-canvas-soft);
}

.step-title {
  font-size: 18px;
  font-weight: 600;
  margin-bottom: var(--spacing-xs);
}

.step-card:not(:last-child)::after {
  content: "";
  position: absolute;
  top: 20px;
  left: calc(50% + 30px);
  width: calc(100% - 60px);
  height: 1px;
  border-top: 1px dashed var(--color-hairline-strong);
  z-index: -1;
}

/* Why Choose Us Grid */
.why-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: var(--spacing-lg);
  margin-top: var(--spacing-2xl);
}

.why-card {
  display: flex;
  gap: var(--spacing-md);
}

.why-icon {
  flex-shrink: 0;
  width: 44px;
  height: 44px;
  border-radius: var(--rounded-md);
  background-color: var(--color-canvas-soft-2);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-primary);
}

.why-content h4 {
  font-size: 16px;
  margin-bottom: 4px;
}

.why-content p {
  font-size: 14px;
  color: var(--color-body);
}

/* Other Tools Grid */
.tools-grid-section {
  background-color: var(--color-canvas-soft-2);
  border-top: 1px solid var(--color-hairline);
  border-bottom: 1px solid var(--color-hairline);
}

.tools-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: var(--spacing-lg);
  margin-top: var(--spacing-xl);
}

.tool-card {
  background-color: var(--color-canvas);
  border: 1px solid var(--color-hairline);
  border-radius: var(--rounded-md);
  padding: var(--spacing-lg);
  transition: var(--transition-normal);
  cursor: pointer;
}

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

.tool-card-icon {
  width: 48px;
  height: 48px;
  border-radius: var(--rounded-md);
  background-color: var(--color-canvas-soft-2);
  color: var(--color-primary);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: var(--spacing-md);
}

.tool-card-title {
  font-size: 18px;
  font-weight: 600;
  margin-bottom: var(--spacing-xs);
}

.tool-card-desc {
  font-size: 14px;
  color: var(--color-body);
}

/* FAQ Accordion Section */
.faq-grid {
  max-width: 800px;
  margin: var(--spacing-xl) auto 0;
  display: flex;
  flex-direction: column;
  gap: var(--spacing-sm);
}

.faq-item {
  background-color: var(--color-canvas);
  border: 1px solid var(--color-hairline);
  border-radius: var(--rounded-md);
  overflow: hidden;
  transition: var(--transition-fast);
}

.faq-question {
  width: 100%;
  background: none;
  border: none;
  font-family: var(--font-sans);
  font-size: 16px;
  font-weight: 600;
  text-align: left;
  padding: var(--spacing-md) var(--spacing-lg);
  display: flex;
  justify-content: space-between;
  align-items: center;
  cursor: pointer;
  color: var(--color-ink);
}

.faq-question svg {
  transition: var(--transition-normal);
  color: var(--color-mute);
  flex-shrink: 0;
}

.faq-question:hover {
  background-color: var(--color-canvas-soft);
}

.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height var(--transition-normal);
  padding: 0 var(--spacing-lg);
  color: var(--color-body);
  font-size: 14px;
  line-height: 1.6;
}

.faq-item.active {
  border-color: var(--color-hairline-strong);
}

.faq-item.active .faq-question svg {
  transform: rotate(180deg);
  color: var(--color-primary);
}

.faq-item.active .faq-answer {
  max-height: 200px; /* arbitrary height to transition */
  padding-bottom: var(--spacing-md);
}

/* SEO Copy Blocks */
.seo-section {
  background-color: var(--color-canvas);
  border-top: 1px solid var(--color-hairline);
  padding: var(--spacing-3xl) 0;
}

.seo-content-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--spacing-xl);
}

.seo-block h3 {
  font-size: 18px;
  margin-bottom: var(--spacing-xs);
}

.seo-block p {
  font-size: 14px;
  color: var(--color-body);
  margin-bottom: var(--spacing-sm);
}

/* Footer Section */
.footer-section {
  background-color: var(--color-canvas-soft-2);
  border-top: 1px solid var(--color-hairline);
  padding: var(--spacing-4xl) 0 var(--spacing-2xl);
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.5fr repeat(3, 1fr);
  gap: var(--spacing-2xl);
  margin-bottom: var(--spacing-3xl);
}

.footer-brand h3 {
  font-size: 18px;
  margin-bottom: var(--spacing-xs);
}

.footer-brand p {
  font-size: 14px;
  color: var(--color-mute);
  margin-bottom: var(--spacing-md);
}

.footer-links-col h4 {
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--color-ink);
  margin-bottom: var(--spacing-md);
  font-family: var(--font-mono);
}

.footer-links-col ul {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: var(--spacing-xs);
}

.footer-links-col a {
  font-size: 14px;
  color: var(--color-body);
}

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

.footer-bottom {
  border-top: 1px solid var(--color-hairline);
  padding-top: var(--spacing-lg);
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: var(--spacing-md);
}

.footer-bottom p {
  font-size: 13px;
  color: var(--color-mute);
}

/* Animations */
.fade-in {
  animation: fadeIn var(--transition-normal);
}

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(4px); }
  to { opacity: 1; transform: translateY(0); }
}

/* Toast Notifications */
.toast-notification {
  position: fixed;
  bottom: var(--spacing-lg);
  right: var(--spacing-lg);
  background-color: var(--color-primary);
  color: var(--color-on-primary);
  padding: var(--spacing-sm) var(--spacing-lg);
  border-radius: var(--rounded-md);
  font-size: 14px;
  box-shadow: 0 10px 25px -5px rgba(0,0,0,0.15);
  display: flex;
  align-items: center;
  gap: var(--spacing-xs);
  z-index: 1000;
  transform: translateY(150%);
  transition: transform var(--transition-normal);
}

.toast-notification.active {
  transform: translateY(0);
}

.toast-notification svg {
  color: var(--color-success);
}

/* Responsive Overrides */
@media (max-width: 959px) {
  .app-container {
    grid-template-columns: 1fr;
  }
  .header {
    height: 60px;
  }
  .nav-links {
    display: none; /* Collapsed on mobile, triggered by menu-toggle */
  }
  .menu-toggle {
    display: block;
  }

  .how-it-works-grid {
    grid-template-columns: 1fr;
    gap: var(--spacing-lg);
  }
  .step-card:not(:last-child)::after {
    display: none;
  }
  .seo-content-grid {
    grid-template-columns: 1fr;
    gap: var(--spacing-lg);
  }
}

@media (max-width: 600px) {
  section {
    padding: var(--spacing-xl) 0;
  }
  .hero-section {
    padding-top: var(--spacing-3xl);
  }
  .hero-ctas {
    flex-direction: column;
    align-items: stretch;
  }
  .footer-grid {
    grid-template-columns: 1fr;
    gap: var(--spacing-xl);
  }
  .crop-presets-grid {
    grid-template-columns: repeat(3, 1fr);
  }
  .preview-stage img {
    max-height: 250px;
  }
  .image-canvas-wrapper {
    min-height: 180px;
  }
}

/* Dynamic Mobile Menu Overlay */
.mobile-nav-overlay {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-color: var(--color-canvas);
  z-index: 999;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: var(--spacing-xl);
  transform: translateX(100%);
  transition: transform var(--transition-normal);
}

.mobile-nav-overlay.active {
  transform: translateX(0);
}

.mobile-nav-overlay .nav-link {
  font-size: 20px;
  font-weight: 600;
}

.mobile-nav-close {
  position: absolute;
  top: 20px;
  right: 20px;
  background: none;
  border: none;
  cursor: pointer;
  color: var(--color-ink);
}

/* Transitions for theme toggle styling */
body, header, footer, .card, .modes-bar, .mode-tab, input, select, .format-btn, .preset-card, .faq-item, .faq-question, .why-icon, .tool-card, .file-meta-row, .meta-pill, .btn, .nav-link, .dropzone {
  transition: background-color var(--transition-normal), border-color var(--transition-normal), color var(--transition-normal), box-shadow var(--transition-normal), transform var(--transition-fast);
}

/* Accessibility Focus States */
a:focus-visible, button:focus-visible, input:focus-visible, select:focus-visible {
  outline: 2px solid var(--color-link);
  outline-offset: 2px;
}

/* Validation Warning Styles */
.form-error-msg {
  color: var(--color-error);
  font-size: 12px;
  margin-top: 4px;
  font-family: var(--font-sans);
  display: none;
  font-weight: 500;
  text-align: left;
}
input.input-error {
  border-color: var(--color-error) !important;
  box-shadow: 0 0 0 2px var(--color-error-soft) !important;
}

/* Dark mode toggle header button with polished animations */
.theme-toggle-btn {
  position: relative;
  width: 36px;
  height: 36px;
  background: none;
  border: 1px solid var(--color-hairline-strong);
  color: var(--color-ink);
  cursor: pointer;
  border-radius: var(--rounded-full);
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all var(--transition-normal);
  overflow: hidden;
}
.theme-toggle-btn:hover {
  background-color: var(--color-canvas-soft-2);
  border-color: var(--color-ink);
}

.theme-toggle-btn svg {
  position: absolute;
  width: 18px;
  height: 18px;
  transition: transform var(--transition-normal), opacity var(--transition-normal);
}

/* Light mode defaults: Sun is active, Moon is hidden */
.theme-toggle-btn .sun-icon {
  opacity: 1;
  transform: scale(1) rotate(0deg);
}

.theme-toggle-btn .moon-icon {
  opacity: 0;
  transform: scale(0.5) rotate(-90deg);
}

/* Dark mode overrides */
:root.dark .theme-toggle-btn .sun-icon {
  opacity: 0;
  transform: scale(0.5) rotate(90deg);
}

:root.dark .theme-toggle-btn .moon-icon {
  opacity: 1;
  transform: scale(1) rotate(0deg);
}

/* Mobile specific theme toggle layout */
.mobile-theme-toggle-container {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  margin-top: var(--spacing-lg);
}

.mobile-theme-text {
  font-size: 16px;
  font-weight: 500;
  color: var(--color-body);
}

/* Dark mode ratio buttons unselected state */
.dark .crop-preset-btn,
.dark .ratio-btn,
.dark .preset-btn,
.dark .crop-ratio-btn,
.dark button[data-ratio],
.dark .ratio-buttons button,
.dark .aspect-ratio-buttons button {
  color: #ffffff !important;
  background: rgba(255, 255, 255, 0.08) !important;
  border: 1px solid rgba(255, 255, 255, 0.35) !important;
}

/* Dark mode ratio buttons hover state */
.dark .crop-preset-btn:hover,
.dark .ratio-btn:hover,
.dark .preset-btn:hover,
.dark .crop-ratio-btn:hover,
.dark button[data-ratio]:hover,
.dark .ratio-buttons button:hover,
.dark .aspect-ratio-buttons button:hover {
  color: #ffffff !important;
  background: rgba(255, 255, 255, 0.16) !important;
  border-color: rgba(255, 255, 255, 0.55) !important;
}

/* Dark mode ratio buttons selected/active states */
.dark .crop-preset-btn.active,
.dark .ratio-btn.active,
.dark .preset-btn.active,
.dark .crop-ratio-btn.active,
.dark button[data-ratio].active,
.dark .ratio-buttons button.active,
.dark .aspect-ratio-buttons button.active,
.dark .crop-preset-btn.selected,
.dark .ratio-btn.selected,
.dark .preset-btn.selected,
.dark .crop-ratio-btn.selected,
.dark button[data-ratio].selected,
.dark .ratio-buttons button.selected,
.dark .aspect-ratio-buttons button.selected,
.dark .crop-preset-btn[aria-selected="true"],
.dark .ratio-btn[aria-selected="true"],
.dark .preset-btn[aria-selected="true"],
.dark .crop-preset-btn[aria-selected="true"],
.dark button[data-ratio][aria-selected="true"] {
  color: #000000 !important;
  background: #ffffff !important;
  border-color: #ffffff !important;
}

/* Fix Preset Size dropdown contrast in dark mode */
.dark select,
.dark .preset-select,
.dark #presetSelect {
  background-color: #020617 !important;
  color: #ffffff !important;
  border: 1px solid rgba(255, 255, 255, 0.35) !important;
  color-scheme: dark;
}

.dark select option,
.dark .preset-select option,
.dark #presetSelect option,
.dark select optgroup,
.dark .preset-select optgroup,
.dark #presetSelect optgroup {
  background-color: #020617 !important;
  color: #ffffff !important;
}

.dark select option:checked,
.dark .preset-select option:checked,
.dark #presetSelect option:checked {
  background-color: #ffffff !important;
  color: #000000 !important;
}

.dark select option:hover,
.dark .preset-select option:hover,
.dark #presetSelect option:hover {
  background-color: #1e293b !important;
  color: #ffffff !important;
}

.dark select:focus,
.dark .preset-select:focus,
.dark #presetSelect:focus {
  outline: 2px solid #ffffff;
  outline-offset: 2px;
}

.dark select.has-selected-preset,
.dark .preset-select.has-selected-preset,
.dark #presetSelect.has-selected-preset {
  background-color: #ffffff !important;
  color: #000000 !important;
  border-color: #ffffff !important;
}

/* Custom Dropdown Styling */
.custom-dropdown {
  position: relative;
  width: 100%;
}

.custom-dropdown-trigger {
  width: 100%;
  height: 40px;
  border: 1px solid var(--color-hairline-strong);
  border-radius: var(--rounded-sm);
  font-family: var(--font-sans);
  font-size: 14px;
  padding: 0 var(--spacing-sm);
  background-color: var(--color-canvas);
  color: var(--color-ink);
  outline: none;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: space-between;
  transition: background-color var(--transition-normal), border-color var(--transition-normal), color var(--transition-normal);
}

.custom-dropdown-trigger:focus {
  border-color: var(--color-primary);
  outline: 2px solid var(--color-link);
  outline-offset: 2px;
}

.custom-dropdown-trigger .chevron-icon {
  transition: transform var(--transition-normal);
}

.custom-dropdown-trigger[aria-expanded="true"] .chevron-icon {
  transform: rotate(180deg);
}

.custom-dropdown-menu {
  display: none;
  position: absolute;
  top: 100%;
  left: 0;
  width: 100%;
  max-height: 250px;
  overflow-y: auto;
  background-color: var(--color-canvas);
  border: 1px solid var(--color-hairline-strong);
  border-radius: var(--rounded-sm);
  margin-top: 4px;
  z-index: 50;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
  text-align: left;
}

.custom-dropdown-menu.show {
  display: block;
}

.custom-dropdown-group-label {
  font-size: 11px;
  font-weight: 600;
  text-transform: uppercase;
  color: var(--color-mute);
  padding: var(--spacing-xs) var(--spacing-sm) var(--spacing-xxs);
  background-color: var(--color-canvas-soft-2);
}

.custom-dropdown-item {
  font-size: 14px;
  padding: var(--spacing-xs) var(--spacing-sm);
  cursor: pointer;
  transition: background-color var(--transition-fast), color var(--transition-fast);
  color: var(--color-ink);
  text-align: left;
}

.custom-dropdown-item:hover {
  background-color: var(--color-canvas-soft-2);
}

.custom-dropdown-item.selected {
  background-color: var(--color-primary);
  color: var(--color-on-primary);
}

/* Dark Mode Styles for Custom Dropdown */

/* Unselected closed trigger in dark mode */
.dark .custom-dropdown-trigger {
  background-color: #020617;
  color: #ffffff;
  border-color: rgba(255, 255, 255, 0.35);
}

/* Selected closed trigger in dark mode */
.dark .custom-dropdown-trigger.has-selected {
  background-color: #ffffff;
  color: #000000;
  border-color: #ffffff;
}

/* Dropdown menu and option styling in dark mode */
.dark .custom-dropdown-menu {
  background-color: #020617;
  border-color: rgba(255, 255, 255, 0.35);
}

.dark .custom-dropdown-group-label {
  background-color: #0f172a;
  color: rgba(255, 255, 255, 0.5);
}

.dark .custom-dropdown-item {
  background-color: #020617;
  color: #ffffff;
}

.dark .custom-dropdown-item:hover {
  background-color: #1e293b;
  color: #ffffff;
}

/* Selected option in dark mode open dropdown */
.dark .custom-dropdown-item.selected {
  background-color: #ffffff;
  color: #000000;
}

/* Trust Badges Styling */
.trust-badges-row {
  display: flex;
  justify-content: center;
  align-items: center;
  flex-wrap: wrap;
  gap: var(--spacing-md);
  margin-top: var(--spacing-lg);
  border-top: 1px solid var(--color-hairline);
  padding-top: var(--spacing-lg);
}

.trust-badge {
  display: inline-flex;
  align-items: center;
  gap: var(--spacing-xs);
  font-size: 13px;
  font-weight: 500;
  color: var(--color-mute);
}

.trust-badge svg {
  color: var(--color-success);
  flex-shrink: 0;
}