/* ==========================================================================
   PixelCraft Studio — Design System & Stylesheet
   Direction: Obsidian Studio / Holographic Modernist
   Fonts: Alexandria (Arabic) + Plus Jakarta Sans (Numerals & Accents)
   ========================================================================== */

:root {
  /* Dark Mode Default (Obsidian Glass Theme) */
  --bg-primary: #07090e;
  --bg-secondary: #0d121d;
  --bg-card: rgba(16, 23, 38, 0.72);
  --bg-card-hover: rgba(22, 32, 54, 0.85);
  --bg-card-solid: #101726;
  --bg-input: rgba(11, 17, 30, 0.8);
  --bg-input-focus: rgba(14, 23, 42, 0.95);
  
  --border-subtle: rgba(255, 255, 255, 0.07);
  --border-card: rgba(255, 255, 255, 0.1);
  --border-card-hover: rgba(52, 211, 153, 0.35);
  --border-input: rgba(255, 255, 255, 0.12);
  --border-active: #10b981;

  --text-main: #f8fafc;
  --text-secondary: #94a3b8;
  --text-muted: #64748b;
  --text-inverse: #07090e;

  --primary: #10b981;
  --primary-glow: rgba(16, 185, 129, 0.35);
  --primary-dark: #059669;
  --secondary: #06b6d4;
  --secondary-glow: rgba(6, 182, 212, 0.3);
  --accent-purple: #6366f1;

  --grad-brand: linear-gradient(135deg, #10b981 0%, #06b6d4 50%, #6366f1 100%);
  --grad-btn: linear-gradient(135deg, #059669 0%, #0284c7 60%, #4f46e5 100%);
  --grad-btn-hover: linear-gradient(135deg, #10b981 0%, #06b6d4 60%, #6366f1 100%);
  --grad-card-glow: linear-gradient(135deg, rgba(16, 185, 129, 0.08), rgba(6, 182, 212, 0.04));

  --badge-bg: rgba(16, 185, 129, 0.12);
  --badge-border: rgba(16, 185, 129, 0.25);
  --badge-text: #34d399;

  --shadow-sm: 0 4px 12px rgba(0, 0, 0, 0.25);
  --shadow-md: 0 10px 30px rgba(0, 0, 0, 0.4);
  --shadow-lg: 0 20px 60px rgba(0, 0, 0, 0.6);
  --shadow-glow: 0 0 35px rgba(16, 185, 129, 0.22);
  --shadow-purple-glow: 0 0 35px rgba(99, 102, 241, 0.2);

  --radius-sm: 10px;
  --radius-md: 16px;
  --radius-lg: 24px;
  --radius-pill: 9999px;

  --transition-fast: 0.18s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-normal: 0.28s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-bounce: 0.35s cubic-bezier(0.34, 1.56, 0.64, 1);
}

/* Light Theme (Porcelain & Crisp Slate) */
[data-theme="light"] {
  --bg-primary: #f8fafc;
  --bg-secondary: #edf2f7;
  --bg-card: rgba(255, 255, 255, 0.9);
  --bg-card-hover: #ffffff;
  --bg-card-solid: #ffffff;
  --bg-input: #f1f5f9;
  --bg-input-focus: #ffffff;

  --border-subtle: rgba(0, 0, 0, 0.06);
  --border-card: #e2e8f0;
  --border-card-hover: rgba(5, 150, 105, 0.4);
  --border-input: #cbd5e1;
  --border-active: #059669;

  --text-main: #0f172a;
  --text-secondary: #475569;
  --text-muted: #94a3b8;
  --text-inverse: #ffffff;

  --primary: #059669;
  --primary-glow: rgba(5, 150, 105, 0.2);
  --primary-dark: #047857;
  --secondary: #0284c7;
  --secondary-glow: rgba(2, 132, 199, 0.2);
  --accent-purple: #4f46e5;

  --grad-brand: linear-gradient(135deg, #059669 0%, #0284c7 50%, #4f46e5 100%);
  --grad-btn: linear-gradient(135deg, #059669 0%, #0284c7 60%, #4f46e5 100%);
  --grad-btn-hover: linear-gradient(135deg, #047857 0%, #0369a1 60%, #4338ca 100%);
  --grad-card-glow: linear-gradient(135deg, rgba(5, 150, 105, 0.04), rgba(2, 132, 199, 0.03));

  --badge-bg: rgba(5, 150, 105, 0.09);
  --badge-border: rgba(5, 150, 105, 0.22);
  --badge-text: #059669;

  --shadow-sm: 0 4px 12px rgba(0, 0, 0, 0.04);
  --shadow-md: 0 10px 25px rgba(15, 23, 42, 0.07);
  --shadow-lg: 0 20px 45px rgba(15, 23, 42, 0.1);
  --shadow-glow: 0 0 30px rgba(5, 150, 105, 0.15);
  --shadow-purple-glow: 0 0 30px rgba(79, 70, 229, 0.12);
}

/* ==========================================================================
   Base & Resets
   ========================================================================== */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  font-family: 'Alexandria', 'Plus Jakarta Sans', system-ui, -apple-system, sans-serif;
  background-color: var(--bg-primary);
  color: var(--text-main);
  min-height: 100vh;
  line-height: 1.6;
  direction: rtl;
  position: relative;
  overflow-x: hidden;
  transition: background-color var(--transition-normal), color var(--transition-normal);
}

/* Latin numbers & stats override for crisp typography */
.stat-number, .target-field-wrap input, .num-stepper-wrap input, .format-name, .dim-input-wrap input, .queue-badge, .version-tag, .tag {
  font-family: 'Plus Jakarta Sans', 'Alexandria', sans-serif;
  font-feature-settings: "tnum" 1, "ss01" 1;
}

/* Ambient Background Lights */
.ambient-glow {
  position: fixed;
  border-radius: 50%;
  filter: blur(120px);
  pointer-events: none;
  z-index: 0;
  opacity: 0.35;
  transition: opacity var(--transition-normal);
}
[data-theme="light"] .ambient-glow {
  opacity: 0.16;
}

.glow-1 {
  width: 580px;
  height: 580px;
  background: radial-gradient(circle, var(--primary) 0%, transparent 70%);
  top: -160px;
  right: -100px;
  animation: floatAmbient 18s ease-in-out infinite alternate;
}

.glow-2 {
  width: 650px;
  height: 650px;
  background: radial-gradient(circle, var(--secondary) 0%, transparent 70%);
  top: 35%;
  left: -200px;
  animation: floatAmbient 22s ease-in-out infinite alternate-reverse;
}

.glow-3 {
  width: 500px;
  height: 500px;
  background: radial-gradient(circle, var(--accent-purple) 0%, transparent 70%);
  bottom: -150px;
  right: 20%;
  animation: floatAmbient 16s ease-in-out infinite alternate;
}

@keyframes floatAmbient {
  0% { transform: translate(0, 0) scale(1); }
  50% { transform: translate(60px, 40px) scale(1.08); }
  100% { transform: translate(-30px, 70px) scale(0.95); }
}

/* ==========================================================================
   Layout Shell
   ========================================================================== */
.app-layout {
  position: relative;
  z-index: 1;
  max-width: 1040px;
  margin: 0 auto;
  padding: 30px 24px 80px;
}

/* ==========================================================================
   Header Navigation
   ========================================================================== */
.app-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  padding: 16px 24px;
  background: var(--bg-card);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border: 1px solid var(--border-card);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
  margin-bottom: 28px;
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}

.brand-group {
  display: flex;
  align-items: center;
  gap: 16px;
}

.brand-icon {
  position: relative;
  width: 44px;
  height: 44px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.brand-pulse {
  position: absolute;
  inset: -3px;
  border-radius: 14px;
  background: var(--grad-brand);
  opacity: 0.35;
  filter: blur(6px);
  z-index: -1;
  animation: pulseGlow 4s ease-in-out infinite alternate;
}

@keyframes pulseGlow {
  0% { opacity: 0.25; transform: scale(0.96); }
  100% { opacity: 0.55; transform: scale(1.04); }
}

.brand-title-row {
  display: flex;
  align-items: center;
  gap: 8px;
}

.brand-title {
  font-size: 1.35rem;
  font-weight: 800;
  letter-spacing: -0.02em;
  color: var(--text-main);
  display: flex;
  align-items: center;
  gap: 6px;
}

.brand-badge {
  font-size: 0.65rem;
  font-weight: 800;
  padding: 2px 7px;
  border-radius: var(--radius-pill);
  background: var(--grad-brand);
  color: #ffffff;
  letter-spacing: 0.05em;
}

.version-tag {
  font-size: 0.72rem;
  font-weight: 700;
  color: var(--badge-text);
  background: var(--badge-bg);
  border: 1px solid var(--badge-border);
  padding: 2px 9px;
  border-radius: var(--radius-pill);
}

.brand-sub {
  font-size: 0.8rem;
  color: var(--text-secondary);
  font-weight: 400;
  margin-top: 1px;
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 12px;
}

.privacy-pill {
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: 0.78rem;
  font-weight: 600;
  color: var(--badge-text);
  background: var(--badge-bg);
  border: 1px solid var(--badge-border);
  padding: 6px 13px;
  border-radius: var(--radius-pill);
}

.theme-toggle-btn {
  display: flex;
  align-items: center;
  gap: 8px;
  background: var(--bg-input);
  border: 1px solid var(--border-input);
  color: var(--text-main);
  padding: 7px 14px;
  border-radius: var(--radius-pill);
  cursor: pointer;
  font-family: inherit;
  font-size: 0.82rem;
  font-weight: 600;
  transition: all var(--transition-fast);
}

.theme-toggle-btn:hover {
  border-color: var(--primary);
  background: var(--bg-card-hover);
  transform: translateY(-1px);
}

.theme-icon-box {
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--primary);
}

[data-theme="dark"] .sun-icon { display: block; }
[data-theme="dark"] .moon-icon { display: none; }
[data-theme="light"] .sun-icon { display: none; }
[data-theme="light"] .moon-icon { display: block; }

/* ==========================================================================
   Main Workspace Sections
   ========================================================================== */
.main-container {
  display: flex;
  flex-direction: column;
  gap: 24px;
}

/* ==========================================================================
   Dropzone Section
   ========================================================================== */
.upload-section {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.dropzone {
  position: relative;
  border: 2px dashed var(--border-input);
  border-radius: var(--radius-lg);
  background: var(--bg-card);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  padding: 44px 28px;
  text-align: center;
  cursor: pointer;
  overflow: hidden;
  transition: all var(--transition-normal);
  box-shadow: var(--shadow-sm);
}

.dropzone::before {
  content: "";
  position: absolute;
  inset: 0;
  background: radial-gradient(circle at 50% 50%, var(--primary-glow) 0%, transparent 65%);
  opacity: 0;
  transition: opacity var(--transition-normal);
  pointer-events: none;
}

.dropzone:hover, .dropzone.drag-active {
  border-color: var(--primary);
  border-style: solid;
  transform: translateY(-2px);
  box-shadow: var(--shadow-glow);
}

.dropzone:hover::before, .dropzone.drag-active::before {
  opacity: 0.35;
}

.dropzone.drag-active {
  background: rgba(16, 185, 129, 0.08);
  border-color: var(--secondary);
}

.dropzone input[type="file"] {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  opacity: 0;
  cursor: pointer;
  z-index: 5;
}

.dropzone-inner {
  position: relative;
  z-index: 2;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 12px;
}

.dropzone-icon-circle {
  width: 68px;
  height: 68px;
  border-radius: 20px;
  background: var(--grad-card-glow);
  border: 1px solid var(--border-card-hover);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--primary);
  box-shadow: 0 8px 24px rgba(16, 185, 129, 0.15);
  transition: transform var(--transition-bounce), color var(--transition-fast);
}

.dropzone:hover .dropzone-icon-circle {
  transform: scale(1.1) translateY(-3px);
  color: var(--secondary);
}

.dropzone-title {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--text-main);
  letter-spacing: -0.01em;
}

.browse-link {
  color: var(--primary);
  text-decoration: underline;
  text-underline-offset: 4px;
}

.dropzone-subtitle {
  font-size: 0.88rem;
  color: var(--text-secondary);
}

.dropzone-subtitle kbd {
  background: var(--bg-input);
  border: 1px solid var(--border-input);
  color: var(--text-main);
  font-family: inherit;
  font-size: 0.78rem;
  font-weight: 700;
  padding: 2px 6px;
  border-radius: 6px;
  box-shadow: 0 2px 0 var(--border-input);
}

.format-tags {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 8px;
  margin-top: 6px;
}

.format-tags .tag {
  font-size: 0.73rem;
  font-weight: 700;
  padding: 4px 10px;
  border-radius: var(--radius-pill);
  background: var(--bg-input);
  border: 1px solid var(--border-subtle);
  color: var(--text-secondary);
  transition: all var(--transition-fast);
}

.dropzone:hover .format-tags .tag {
  border-color: var(--border-card-hover);
  color: var(--text-main);
}

/* ==========================================================================
   Selected Files Queue Card
   ========================================================================== */
.files-queue-card {
  background: var(--bg-card);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border: 1px solid var(--border-card);
  border-radius: var(--radius-md);
  padding: 16px 20px;
  box-shadow: var(--shadow-sm);
  animation: fadeInDown 0.3s var(--transition-normal);
}

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

.queue-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 12px;
}

.queue-title-wrap {
  display: flex;
  align-items: center;
  gap: 10px;
}

.queue-badge {
  font-size: 0.78rem;
  font-weight: 800;
  background: var(--grad-brand);
  color: #ffffff;
  padding: 3px 10px;
  border-radius: var(--radius-pill);
}

.queue-text {
  font-size: 0.88rem;
  font-weight: 600;
  color: var(--text-main);
}

.clear-queue-btn {
  display: flex;
  align-items: center;
  gap: 6px;
  background: transparent;
  border: 1px solid var(--border-subtle);
  color: var(--text-muted);
  font-family: inherit;
  font-size: 0.78rem;
  font-weight: 600;
  padding: 5px 12px;
  border-radius: var(--radius-pill);
  cursor: pointer;
  transition: all var(--transition-fast);
}

.clear-queue-btn:hover {
  background: rgba(239, 68, 68, 0.12);
  border-color: rgba(239, 68, 68, 0.3);
  color: #ef4444;
}

.queue-items-scroller {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
  gap: 10px;
  max-height: 240px;
  overflow-y: auto;
  padding: 4px;
}

/* Custom scrollbars */
.queue-items-scroller::-webkit-scrollbar,
.queue-items-scroller::-webkit-scrollbar-thumb {
  width: 6px;
  border-radius: 10px;
}
.queue-items-scroller::-webkit-scrollbar { background: rgba(0,0,0,0.1); }
.queue-items-scroller::-webkit-scrollbar-thumb { background: var(--border-input); }

.queue-item {
  display: flex;
  align-items: center;
  gap: 10px;
  background: var(--bg-input);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-sm);
  padding: 8px 10px;
  position: relative;
  transition: border-color var(--transition-fast);
}

.queue-item:hover {
  border-color: var(--border-card-hover);
}

.queue-item-thumb {
  width: 44px;
  height: 44px;
  border-radius: 8px;
  object-fit: cover;
  background: var(--bg-card-solid);
  flex-shrink: 0;
}

.queue-item-meta {
  flex: 1;
  min-width: 0;
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.queue-item-name {
  font-size: 0.8rem;
  font-weight: 700;
  color: var(--text-main);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.queue-item-size {
  font-size: 0.72rem;
  color: var(--text-muted);
}

.queue-item-del {
  background: transparent;
  border: none;
  color: var(--text-muted);
  cursor: pointer;
  padding: 4px;
  border-radius: 6px;
  transition: all var(--transition-fast);
  display: flex;
  align-items: center;
  justify-content: center;
}

.queue-item-del:hover {
  color: #ef4444;
  background: rgba(239, 68, 68, 0.1);
}

/* ==========================================================================
   Control Settings & Deck
   ========================================================================== */
.controls-deck {
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.config-panel {
  background: var(--bg-card);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border: 1px solid var(--border-card);
  border-radius: var(--radius-lg);
  padding: 26px 28px;
  box-shadow: var(--shadow-sm);
  transition: border-color var(--transition-fast);
}

.panel-header {
  display: flex;
  align-items: center;
  gap: 14px;
  margin-bottom: 22px;
}

.panel-icon {
  width: 42px;
  height: 42px;
  border-radius: 12px;
  background: var(--grad-card-glow);
  border: 1px solid var(--border-card-hover);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--primary);
  flex-shrink: 0;
}

.panel-title {
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--text-main);
  letter-spacing: -0.01em;
}

.panel-desc {
  font-size: 0.82rem;
  color: var(--text-secondary);
}

/* ==========================================================================
   Format Selector Grid
   ========================================================================== */
.format-cards-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 14px;
}

.format-card {
  position: relative;
  background: var(--bg-input);
  border: 1.5px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 16px 16px 14px;
  cursor: pointer;
  display: flex;
  flex-direction: column;
  gap: 8px;
  transition: all var(--transition-fast);
  user-select: none;
}

.format-card input[type="radio"] {
  position: absolute;
  opacity: 0;
  pointer-events: none;
}

.card-radio-mark {
  position: absolute;
  top: 14px;
  left: 14px;
  width: 18px;
  height: 18px;
  border-radius: 50%;
  border: 2px solid var(--border-input);
  transition: all var(--transition-fast);
}

.card-radio-mark::after {
  content: "";
  position: absolute;
  inset: 3px;
  border-radius: 50%;
  background: var(--primary);
  opacity: 0;
  transform: scale(0.4);
  transition: all var(--transition-bounce);
}

.format-card:hover {
  border-color: var(--border-card-hover);
  background: var(--bg-card-hover);
  transform: translateY(-2px);
}

.format-card.active {
  border-color: var(--primary);
  background: var(--grad-card-glow);
  box-shadow: 0 6px 20px rgba(16, 185, 129, 0.12);
}

.format-card.active .card-radio-mark {
  border-color: var(--primary);
}

.format-card.active .card-radio-mark::after {
  opacity: 1;
  transform: scale(1);
}

.card-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 6px;
  padding-left: 24px; /* clearance for radio circle */
}

.format-name {
  font-size: 1.15rem;
  font-weight: 800;
  color: var(--text-main);
  letter-spacing: -0.01em;
}

.format-badge-star {
  font-size: 0.68rem;
  font-weight: 700;
  padding: 2px 8px;
  border-radius: var(--radius-pill);
  background: var(--badge-bg);
  border: 1px solid var(--badge-border);
  color: var(--badge-text);
  white-space: nowrap;
}

.format-badge-tag {
  font-size: 0.68rem;
  font-weight: 700;
  padding: 2px 7px;
  border-radius: var(--radius-pill);
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  color: var(--text-secondary);
  white-space: nowrap;
}

.format-info {
  font-size: 0.77rem;
  color: var(--text-secondary);
  line-height: 1.5;
}

/* ==========================================================================
   Mode Tabs (Smart vs Manual)
   ========================================================================== */
.mode-tabs {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 8px;
  background: var(--bg-input);
  padding: 5px;
  border-radius: var(--radius-md);
  border: 1px solid var(--border-subtle);
  margin-bottom: 22px;
}

.mode-tab-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  background: transparent;
  border: none;
  padding: 12px 16px;
  border-radius: var(--radius-sm);
  color: var(--text-secondary);
  font-family: inherit;
  font-size: 0.92rem;
  font-weight: 700;
  cursor: pointer;
  transition: all var(--transition-fast);
}

.mode-tab-btn:hover {
  color: var(--text-main);
}

.mode-tab-btn.active {
  background: var(--bg-card-solid);
  color: var(--text-main);
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--border-card);
}

.tab-highlight {
  font-size: 0.68rem;
  font-weight: 800;
  background: var(--badge-bg);
  color: var(--badge-text);
  border: 1px solid var(--badge-border);
  padding: 2px 7px;
  border-radius: var(--radius-pill);
}

.tab-view {
  display: none;
  animation: fadeIn 0.25s var(--transition-normal);
}

.tab-view.active {
  display: block;
}

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(6px); }
  to { opacity: 1; transform: translateY(0); }
}

/* ==========================================================================
   Tab View 1: Smart Target Card
   ========================================================================== */
.smart-target-card {
  background: var(--grad-card-glow);
  border: 1.5px solid var(--badge-border);
  border-radius: var(--radius-md);
  padding: 22px 24px;
  display: flex;
  flex-direction: column;
  gap: 18px;
  box-shadow: 0 4px 20px rgba(16, 185, 129, 0.08);
}

.smart-card-top {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.smart-badge-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 10px;
}

.smart-glow-badge {
  font-size: 0.82rem;
  font-weight: 800;
  color: var(--badge-text);
  background: var(--badge-bg);
  border: 1px solid var(--badge-border);
  padding: 4px 12px;
  border-radius: var(--radius-pill);
}

.equation-status-pill {
  font-size: 0.74rem;
  font-weight: 700;
  color: #10b981;
  display: flex;
  align-items: center;
  gap: 6px;
}

.equation-status-pill::before {
  content: "";
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: #10b981;
  box-shadow: 0 0 8px #10b981;
  animation: blinkDot 2s infinite ease-in-out;
}

@keyframes blinkDot {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.4; transform: scale(0.85); }
}

.smart-explain {
  font-size: 0.86rem;
  color: var(--text-secondary);
  line-height: 1.6;
}

.smart-explain strong {
  color: var(--text-main);
  font-weight: 700;
}

.target-input-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  background: var(--bg-card);
  border: 1px solid var(--border-card);
  border-radius: var(--radius-sm);
  padding: 14px 18px;
  gap: 16px;
}

.target-label-group {
  display: flex;
  flex-direction: column;
}

.target-label {
  font-size: 0.94rem;
  font-weight: 700;
  color: var(--text-main);
}

.target-sublabel {
  font-size: 0.77rem;
  color: var(--text-muted);
}

.target-field-wrap {
  display: flex;
  align-items: center;
  gap: 8px;
  background: var(--bg-input);
  border: 1.5px solid var(--primary);
  border-radius: 10px;
  padding: 6px 14px;
  box-shadow: 0 0 14px rgba(16, 185, 129, 0.2);
}

.target-field-wrap input {
  width: 70px;
  background: transparent;
  border: none;
  color: var(--primary);
  font-size: 1.25rem;
  font-weight: 800;
  text-align: center;
  outline: none;
}

.target-unit {
  font-size: 0.82rem;
  font-weight: 700;
  color: var(--text-secondary);
}

.presets-row {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-wrap: wrap;
}

.presets-label {
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--text-muted);
}

.preset-chips {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.preset-chip {
  background: var(--bg-input);
  border: 1px solid var(--border-input);
  color: var(--text-secondary);
  font-family: inherit;
  font-size: 0.78rem;
  font-weight: 700;
  padding: 5px 12px;
  border-radius: var(--radius-pill);
  cursor: pointer;
  transition: all var(--transition-fast);
}

.preset-chip:hover {
  border-color: var(--primary);
  color: var(--text-main);
}

.preset-chip.active {
  background: var(--primary);
  border-color: var(--primary);
  color: #ffffff;
  box-shadow: 0 3px 10px rgba(16, 185, 129, 0.3);
}

.smart-features-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 12px;
  padding-top: 6px;
  border-top: 1px solid var(--border-subtle);
}

.feature-item {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.78rem;
  font-weight: 600;
  color: var(--text-secondary);
}

/* ==========================================================================
   Tab View 2: Manual Controls
   ========================================================================== */
.manual-controls-grid {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.setting-item-box {
  background: var(--bg-input);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 16px 20px;
  display: flex;
  flex-direction: column;
  gap: 12px;
  transition: border-color var(--transition-fast);
}

.setting-item-box:focus-within {
  border-color: var(--border-card-hover);
}

.setting-item-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
}

.setting-label-block {
  display: flex;
  flex-direction: column;
}

.setting-name {
  font-size: 0.94rem;
  font-weight: 700;
  color: var(--text-main);
}

.setting-desc {
  font-size: 0.77rem;
  color: var(--text-muted);
}

.num-stepper-wrap {
  display: flex;
  align-items: center;
  gap: 4px;
  background: var(--bg-card);
  border: 1.5px solid var(--border-input);
  border-radius: 10px;
  padding: 5px 12px;
  transition: border-color var(--transition-fast);
}

.num-stepper-wrap:focus-within {
  border-color: var(--primary);
}

.num-stepper-wrap input {
  width: 48px;
  background: transparent;
  border: none;
  color: var(--primary);
  font-size: 1.05rem;
  font-weight: 800;
  text-align: center;
  outline: none;
}

.num-unit {
  font-size: 0.82rem;
  font-weight: 700;
  color: var(--text-secondary);
}

/* Custom Styled Range Sliders */
.premium-slider {
  width: 100%;
  -webkit-appearance: none;
  appearance: none;
  height: 7px;
  border-radius: var(--radius-pill);
  outline: none;
  cursor: pointer;
  background: linear-gradient(90deg, var(--secondary), var(--primary));
  position: relative;
}

.premium-slider::-webkit-slider-thumb {
  -webkit-appearance: none;
  width: 22px;
  height: 22px;
  border-radius: 50%;
  background: #ffffff;
  border: 3px solid var(--primary);
  box-shadow: 0 3px 10px rgba(0, 0, 0, 0.35);
  cursor: pointer;
  transition: transform 0.15s var(--transition-bounce), box-shadow 0.15s;
}

.premium-slider::-webkit-slider-thumb:hover {
  transform: scale(1.22);
  box-shadow: 0 4px 14px var(--primary-glow);
}

.premium-slider::-moz-range-thumb {
  width: 22px;
  height: 22px;
  border-radius: 50%;
  background: #ffffff;
  border: 3px solid var(--primary);
  box-shadow: 0 3px 10px rgba(0, 0, 0, 0.35);
  cursor: pointer;
}

.slider-marks {
  display: flex;
  justify-content: space-between;
  font-size: 0.72rem;
  color: var(--text-muted);
}

.scale-live-hint {
  font-size: 0.78rem;
  font-weight: 700;
  color: var(--secondary);
}

/* Aspect ratio lock & custom dimensions */
.aspect-ratio-btn {
  display: flex;
  align-items: center;
  gap: 6px;
  background: var(--bg-card);
  border: 1px solid var(--border-input);
  color: var(--text-secondary);
  font-family: inherit;
  font-size: 0.76rem;
  font-weight: 600;
  padding: 5px 12px;
  border-radius: var(--radius-pill);
  cursor: pointer;
  transition: all var(--transition-fast);
}

.aspect-ratio-btn.active {
  background: var(--badge-bg);
  border-color: var(--badge-border);
  color: var(--badge-text);
}

.dimensions-input-group {
  display: flex;
  align-items: center;
  gap: 14px;
}

.dim-box {
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.dim-box label {
  font-size: 0.78rem;
  font-weight: 700;
  color: var(--text-secondary);
}

.dim-input-wrap {
  display: flex;
  align-items: center;
  background: var(--bg-card);
  border: 1.5px solid var(--border-input);
  border-radius: 10px;
  padding: 7px 12px;
  transition: border-color var(--transition-fast);
}

.dim-input-wrap:focus-within {
  border-color: var(--primary);
}

.dim-input-wrap input {
  width: 100%;
  background: transparent;
  border: none;
  color: var(--text-main);
  font-size: 0.95rem;
  font-weight: 700;
  text-align: center;
  outline: none;
}

.dim-unit {
  font-size: 0.8rem;
  color: var(--text-muted);
}

.dim-separator {
  font-size: 1.3rem;
  color: var(--text-muted);
  font-weight: 700;
  margin-top: 18px;
}

/* ==========================================================================
   Action Conversion Dock
   ========================================================================== */
.action-dock {
  display: flex;
  flex-direction: column;
  gap: 16px;
  margin-top: 6px;
}

.primary-convert-btn {
  position: relative;
  width: 100%;
  border: none;
  border-radius: var(--radius-md);
  padding: 18px 28px;
  cursor: pointer;
  background: var(--grad-btn);
  color: #ffffff;
  font-family: inherit;
  font-size: 1.15rem;
  font-weight: 800;
  letter-spacing: -0.01em;
  box-shadow: 0 10px 30px rgba(5, 150, 105, 0.35);
  overflow: hidden;
  transition: transform var(--transition-fast), box-shadow var(--transition-fast);
}

.btn-glow-layer {
  position: absolute;
  inset: 0;
  background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.25), transparent);
  transform: translateX(100%);
  transition: transform 0.6s ease;
}

.primary-convert-btn:hover {
  transform: translateY(-2px);
  box-shadow: 0 14px 40px rgba(5, 150, 105, 0.45);
  background: var(--grad-btn-hover);
}

.primary-convert-btn:hover .btn-glow-layer {
  transform: translateX(-100%);
}

.primary-convert-btn:active {
  transform: translateY(1px);
}

.primary-convert-btn:disabled {
  opacity: 0.65;
  cursor: not-allowed;
  transform: none;
  box-shadow: none;
}

.btn-content {
  position: relative;
  z-index: 2;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
}

/* Progress Tracker */
.progress-bar-container {
  background: var(--bg-card);
  border: 1px solid var(--border-card);
  border-radius: var(--radius-md);
  padding: 14px 18px;
  display: flex;
  flex-direction: column;
  gap: 8px;
  animation: fadeIn 0.25s var(--transition-normal);
}

.progress-info-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 0.84rem;
  font-weight: 700;
}

.progress-status-text {
  color: var(--text-main);
}

.progress-percentage-text {
  color: var(--primary);
  font-family: 'Plus Jakarta Sans', sans-serif;
}

.progress-track {
  height: 8px;
  background: var(--bg-input);
  border-radius: var(--radius-pill);
  overflow: hidden;
}

.progress-fill {
  height: 100%;
  background: var(--grad-brand);
  border-radius: var(--radius-pill);
  transition: width 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  box-shadow: 0 0 10px var(--primary-glow);
}

/* ==========================================================================
   Results Overview & Cards
   ========================================================================== */
.results-section {
  display: flex;
  flex-direction: column;
  gap: 20px;
  animation: fadeIn 0.35s var(--transition-normal);
}

.results-overview-card {
  background: var(--bg-card);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border: 1px solid var(--border-card);
  border-radius: var(--radius-lg);
  padding: 20px 26px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 20px;
  box-shadow: var(--shadow-sm);
}

.overview-main {
  display: flex;
  align-items: center;
  gap: 20px;
  flex-wrap: wrap;
}

.overview-stat-item {
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.stat-number {
  font-size: 1.45rem;
  font-weight: 800;
  color: var(--text-main);
}

.stat-label {
  font-size: 0.76rem;
  color: var(--text-muted);
  font-weight: 600;
}

.highlight-blue { color: var(--secondary); }
.highlight-green { color: var(--primary); }
.highlight-saved { color: #34d399; }

.overview-divider {
  width: 1px;
  height: 38px;
  background: var(--border-card);
}

.overview-actions {
  display: flex;
  align-items: center;
  gap: 10px;
}

.download-all-zip-btn {
  display: flex;
  align-items: center;
  gap: 8px;
  background: var(--grad-brand);
  color: #ffffff;
  border: none;
  font-family: inherit;
  font-size: 0.88rem;
  font-weight: 700;
  padding: 10px 18px;
  border-radius: var(--radius-sm);
  cursor: pointer;
  box-shadow: 0 4px 16px rgba(16, 185, 129, 0.28);
  transition: all var(--transition-fast);
}

.download-all-zip-btn:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 22px rgba(16, 185, 129, 0.4);
}

.clear-results-btn {
  display: flex;
  align-items: center;
  gap: 6px;
  background: var(--bg-input);
  border: 1px solid var(--border-input);
  color: var(--text-secondary);
  font-family: inherit;
  font-size: 0.82rem;
  font-weight: 600;
  padding: 9px 14px;
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: all var(--transition-fast);
}

.clear-results-btn:hover {
  border-color: #ef4444;
  color: #ef4444;
}

/* Converted Result Cards Grid */
.results-cards-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 16px;
}

.result-card {
  background: var(--bg-card);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border: 1px solid var(--border-card);
  border-radius: var(--radius-md);
  padding: 18px 20px;
  display: grid;
  grid-template-columns: 110px 1fr auto;
  gap: 20px;
  align-items: center;
  box-shadow: var(--shadow-sm);
  transition: all var(--transition-fast);
  animation: slideUpItem 0.35s cubic-bezier(0.16, 1, 0.3, 1);
}

.result-card:hover {
  border-color: var(--border-card-hover);
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

@keyframes slideUpItem {
  from { opacity: 0; transform: translateY(16px); }
  to { opacity: 1; transform: translateY(0); }
}

.result-thumb-wrapper {
  position: relative;
  width: 110px;
  height: 84px;
  border-radius: 12px;
  overflow: hidden;
  background: var(--bg-card-solid);
  border: 1px solid var(--border-subtle);
  flex-shrink: 0;
}

.result-thumb-img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.3s ease;
}

.result-card:hover .result-thumb-img {
  transform: scale(1.06);
}

.result-format-badge {
  position: absolute;
  bottom: 6px;
  right: 6px;
  background: rgba(0, 0, 0, 0.75);
  color: #ffffff;
  font-size: 0.65rem;
  font-weight: 800;
  padding: 2px 6px;
  border-radius: 4px;
  backdrop-filter: blur(4px);
}

.result-details {
  display: flex;
  flex-direction: column;
  gap: 6px;
  min-width: 0;
}

.result-title-row {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-wrap: wrap;
}

.result-filename {
  font-size: 0.98rem;
  font-weight: 700;
  color: var(--text-main);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  max-width: 280px;
}

.result-target-badge {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  font-size: 0.72rem;
  font-weight: 800;
  padding: 3px 9px;
  border-radius: var(--radius-pill);
}

.badge-target-success {
  background: rgba(16, 185, 129, 0.15);
  border: 1px solid rgba(16, 185, 129, 0.35);
  color: #34d399;
}

.badge-target-warn {
  background: rgba(245, 158, 11, 0.15);
  border: 1px solid rgba(245, 158, 11, 0.35);
  color: #fbbf24;
}

.result-specs-row {
  display: flex;
  align-items: center;
  gap: 16px;
  flex-wrap: wrap;
  font-size: 0.8rem;
  color: var(--text-secondary);
}

.result-dims {
  font-family: 'Plus Jakarta Sans', 'Alexandria', sans-serif;
  color: var(--text-muted);
}

.result-size-compare {
  display: flex;
  align-items: center;
  gap: 8px;
}

.orig-size {
  text-decoration: line-through;
  color: var(--text-muted);
}

.new-size {
  font-weight: 800;
  color: var(--primary);
  font-family: 'Plus Jakarta Sans', sans-serif;
}

.saved-pill {
  font-size: 0.72rem;
  font-weight: 800;
  background: var(--badge-bg);
  color: var(--badge-text);
  border: 1px solid var(--badge-border);
  padding: 1px 7px;
  border-radius: var(--radius-pill);
}

.result-actions-group {
  display: flex;
  align-items: center;
  gap: 8px;
}

.compare-open-btn {
  display: flex;
  align-items: center;
  gap: 6px;
  background: var(--bg-input);
  border: 1px solid var(--border-input);
  color: var(--text-main);
  font-family: inherit;
  font-size: 0.82rem;
  font-weight: 600;
  padding: 9px 14px;
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: all var(--transition-fast);
  white-space: nowrap;
}

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

.download-single-btn {
  display: flex;
  align-items: center;
  gap: 6px;
  background: var(--grad-brand);
  color: #ffffff;
  border: none;
  font-family: inherit;
  font-size: 0.84rem;
  font-weight: 700;
  padding: 9px 16px;
  border-radius: var(--radius-sm);
  cursor: pointer;
  box-shadow: 0 4px 14px rgba(16, 185, 129, 0.25);
  transition: all var(--transition-fast);
  white-space: nowrap;
}

.download-single-btn:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(16, 185, 129, 0.38);
}

/* ==========================================================================
   Interactive Comparison Modal (Split Slider Viewport)
   ========================================================================== */
.compare-modal-backdrop {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.8);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  z-index: 1000;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 24px;
  animation: fadeIn 0.25s ease-out;
}

.compare-modal-dialog {
  background: var(--bg-card-solid);
  border: 1px solid var(--border-card);
  border-radius: var(--radius-lg);
  width: 100%;
  max-width: 860px;
  max-height: 90vh;
  display: flex;
  flex-direction: column;
  overflow: hidden;
  box-shadow: var(--shadow-lg);
}

.modal-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 18px 24px;
  border-bottom: 1px solid var(--border-subtle);
  background: var(--bg-secondary);
}

.modal-title-group {
  display: flex;
  flex-direction: column;
}

.modal-title {
  font-size: 1.15rem;
  font-weight: 800;
  color: var(--text-main);
}

.modal-subtitle {
  font-size: 0.78rem;
  color: var(--text-muted);
}

.modal-close-btn {
  background: transparent;
  border: none;
  color: var(--text-muted);
  cursor: pointer;
  padding: 6px;
  border-radius: 8px;
  transition: all var(--transition-fast);
  display: flex;
  align-items: center;
  justify-content: center;
}

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

.modal-body {
  padding: 20px 24px 24px;
  display: flex;
  flex-direction: column;
  gap: 16px;
  overflow-y: auto;
}

.comparison-viewport {
  position: relative;
  width: 100%;
  height: 440px;
  background: repeating-conic-gradient(#1e293b 0% 25%, #0f172a 0% 50%) 50% / 20px 20px;
  border-radius: var(--radius-md);
  overflow: hidden;
  user-select: none;
  border: 1px solid var(--border-subtle);
  cursor: ew-resize;
}

.compare-img {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  object-fit: contain;
  pointer-events: none;
}

.compare-badge {
  position: absolute;
  top: 14px;
  z-index: 10;
  font-size: 0.74rem;
  font-weight: 800;
  padding: 4px 10px;
  border-radius: var(--radius-pill);
  backdrop-filter: blur(8px);
}

.compare-badge-after {
  left: 14px;
  background: rgba(16, 185, 129, 0.85);
  color: #ffffff;
}

.compare-before-clip {
  position: absolute;
  top: 0;
  left: 0;
  width: 50%;
  height: 100%;
  overflow: hidden;
  z-index: 5;
}

.compare-before-clip .compare-img {
  width: 100%;
  min-width: 100%;
  /* We will dynamically sync clip image width via JS */
}

.compare-badge-before {
  right: 14px;
  background: rgba(0, 0, 0, 0.75);
  color: #ffffff;
  border: 1px solid rgba(255, 255, 255, 0.15);
}

.compare-slider-divider {
  position: absolute;
  top: 0;
  bottom: 0;
  left: 50%;
  width: 3px;
  z-index: 15;
  transform: translateX(-50%);
  pointer-events: none;
}

.slider-divider-line {
  position: absolute;
  inset: 0;
  background: #ffffff;
  box-shadow: 0 0 10px rgba(0, 0, 0, 0.5);
}

.slider-divider-handle {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 36px;
  height: 36px;
  border-radius: 50%;
  background: #ffffff;
  color: #0f172a;
  border: 2px solid var(--primary);
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.4);
}

.compare-metrics-bar {
  display: flex;
  align-items: center;
  justify-content: space-around;
  background: var(--bg-input);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-sm);
  padding: 12px 18px;
  gap: 12px;
  flex-wrap: wrap;
}

.metric-col {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 2px;
}

.metric-label {
  font-size: 0.72rem;
  color: var(--text-muted);
}

.metric-val {
  font-size: 0.92rem;
  font-weight: 800;
  color: var(--text-main);
  font-family: 'Plus Jakarta Sans', sans-serif;
}

.metric-arrow {
  color: var(--text-muted);
  font-size: 1.1rem;
}

/* ==========================================================================
   Footer
   ========================================================================== */
.app-footer {
  margin-top: 48px;
  text-align: center;
  border-top: 1px solid var(--border-subtle);
  padding-top: 24px;
}

.footer-content {
  font-size: 0.8rem;
  color: var(--text-muted);
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.footer-sub {
  font-size: 0.74rem;
}

/* ==========================================================================
   Responsive Adaptations
   ========================================================================== */
@media (max-width: 860px) {
  .format-cards-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .smart-features-grid {
    grid-template-columns: 1fr;
  }
  .results-overview-card {
    flex-direction: column;
    align-items: stretch;
  }
  .overview-main {
    justify-content: space-between;
  }
}

@media (max-width: 640px) {
  .app-layout {
    padding: 16px 12px 60px;
  }
  .app-header {
    flex-direction: column;
    align-items: stretch;
    padding: 16px;
    gap: 14px;
  }
  .header-actions {
    justify-content: space-between;
  }
  .format-cards-grid {
    grid-template-columns: 1fr;
  }
  .mode-tabs {
    grid-template-columns: 1fr;
  }
  .result-card {
    grid-template-columns: 80px 1fr;
    gap: 12px;
  }
  .result-actions-group {
    grid-column: 1 / -1;
    display: flex;
    justify-content: stretch;
  }
  .result-actions-group button {
    flex: 1;
    justify-content: center;
  }
  .comparison-viewport {
    height: 300px;
  }
}

.author-highlight {
  color: var(--primary);
  font-weight: 800;
}

.author-tag {
  color: var(--primary);
  font-weight: 800;
  text-decoration: underline;
  text-underline-offset: 3px;
}

.max-limit-tag {
  background: rgba(16, 185, 129, 0.15) !important;
  border-color: rgba(16, 185, 129, 0.35) !important;
  color: var(--primary) !important;
  font-weight: 800 !important;
}

.download-all-direct-btn {
  display: flex;
  align-items: center;
  gap: 8px;
  background: var(--bg-input);
  color: var(--text-main);
  border: 1.5px solid var(--border-input);
  font-family: inherit;
  font-size: 0.86rem;
  font-weight: 700;
  padding: 10px 18px;
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: all var(--transition-fast);
}

.download-all-direct-btn:hover {
  border-color: var(--secondary);
  color: var(--secondary);
  background: var(--bg-card-hover);
  transform: translateY(-2px);
}