/* ============================================
   🚀 ROCKET - ابزار حرفه‌ای فایل
   تم قرمز | دارک/لایت مود | طراحی مدرن
   ============================================ */

/* ============================================
   1. VARIABLES & THEMES
   ============================================ */
:root {
    --red-50: #fef2f2;
    --red-100: #fee2e2;
    --red-200: #fecaca;
    --red-300: #fca5a5;
    --red-400: #f87171;
    --red-500: #ef4444;
    --red-600: #dc2626;
    --red-700: #b91c1c;
    --red-800: #991b1b;
    --red-900: #7f1d1d;

    --bg-dark: #080808;
    --bg-sidebar: #0c0c0c;
    --bg-card: #111111;
    --bg-hover: #1a1a1a;
    --bg-input: #161616;
    --bg-elevated: #1c1c1c;

    --bg-dark-rgb: 8, 8, 8;
    --bg-sidebar-rgb: 12, 12, 12;

    --accent-primary: var(--red-600);
    --accent-secondary: var(--red-700);
    --accent-soft: rgba(220, 38, 38, 0.08);
    --accent-glow: rgba(220, 38, 38, 0.2);
    --accent-gradient: linear-gradient(135deg, var(--red-600), var(--red-700));
    --accent-gradient-subtle: linear-gradient(135deg, rgba(220,38,38,0.15), rgba(185,28,28,0.05));

    --text-primary: #f0f0f0;
    --text-secondary: #a0a0a0;
    --text-muted: #686868;

    --border: rgba(255, 255, 255, 0.06);
    --border-hover: rgba(255, 255, 255, 0.1);
    --border-focus: rgba(220, 38, 38, 0.5);

    --shadow-sm: 0 1px 3px rgba(0,0,0,0.4);
    --shadow-md: 0 4px 12px rgba(0,0,0,0.5);
    --shadow-lg: 0 8px 32px rgba(0,0,0,0.6);
    --shadow-red: 0 4px 20px rgba(220,38,38,0.3);
    --shadow-glow: 0 0 20px rgba(220,38,38,0.15), 0 0 60px rgba(220,38,38,0.05);

    --success: #10b981;
    --error: #ef4444;
    --warning: #f59e0b;
    --info: #3b82f6;

    --radius-sm: 6px;
    --radius-md: 10px;
    --radius-lg: 16px;
    --radius-xl: 24px;

    --transition-fast: 0.15s cubic-bezier(0.4,0,0.2,1);
    --transition-normal: 0.25s cubic-bezier(0.4,0,0.2,1);
    --transition-slow: 0.4s cubic-bezier(0.4,0,0.2,1);
}

body.light-mode {
    --bg-dark: #f5f7fa;
    --bg-sidebar: #ffffff;
    --bg-card: #ffffff;
    --bg-hover: #eef1f5;
    --bg-input: #f5f7fa;
    --bg-elevated: #ffffff;

    --bg-dark-rgb: 245, 247, 250;
    --bg-sidebar-rgb: 255, 255, 255;

    --text-primary: #0f172a;
    --text-secondary: #334155;
    --text-muted: #64748b;
    --border: rgba(0, 0, 0, 0.07);
    --border-hover: rgba(0, 0, 0, 0.12);
    --shadow-red: 0 4px 20px rgba(220,38,38,0.15);
    --shadow-glow: 0 0 20px rgba(220,38,38,0.08);
}

/* ============================================
   2. RESET & BASE
   ============================================ */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    -webkit-tap-highlight-color: transparent;
}

body {
    font-family: 'SG kara','Inter', system-ui, -apple-system, 'Segoe UI', Roboto, 'Vazir', Tahoma, sans-serif;
    background: var(--bg-dark);
    background-image: radial-gradient(ellipse at 50% 0%, rgba(220,38,38,0.04) 0%, transparent 60%),
                      radial-gradient(ellipse at 80% 50%, rgba(220,38,38,0.02) 0%, transparent 50%);
    color: var(--text-primary);
    line-height: 1.6;
    overflow: hidden;
    font-weight: 400;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

::selection {
    background: var(--accent-primary);
    color: white;
}

img, svg, canvas {
    max-width: 100%;
    height: auto;
}

::-webkit-scrollbar {
    width: 4px;
    height: 4px;
}

::-webkit-scrollbar-track {
    background: transparent;
}

::-webkit-scrollbar-thumb {
    background: var(--accent-primary);
    border-radius: 10px;
}

::-webkit-scrollbar-thumb:hover {
    background: var(--accent-secondary);
}

/* ============================================
   3. LAYOUT
   ============================================ */
.sidebar {
    position: fixed;
    right: 0;
    top: 0;
    width: 280px;
    height: 100vh;
    background: rgba(var(--bg-sidebar-rgb), 0.92);
    backdrop-filter: blur(24px);
    -webkit-backdrop-filter: blur(24px);
    border-left: 1px solid var(--border);
    display: flex;
    flex-direction: column;
    transition: width var(--transition-normal), transform var(--transition-normal);
    z-index: 100;
    box-shadow: -2px 0 40px rgba(0, 0, 0, 0.4);
}

.sidebar.collapsed {
    width: 80px;
}

.sidebar.collapsed .logo span,
.sidebar.collapsed .nav-item span,
.sidebar.collapsed .status span {
    display: none;
}

.sidebar.collapsed .nav-item {
    justify-content: center;
    padding: 12px;
}

.sidebar.collapsed .nav-item i {
    margin: 0;
    font-size: 1.4rem;
}

.sidebar-header {
    padding: 24px 20px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    border-bottom: 1px solid var(--border);
}

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

.logo i {
    font-size: 28px;
    color: var(--accent-primary);
    filter: drop-shadow(0 0 8px var(--accent-glow));
    transition: transform var(--transition-fast);
    animation: logo-float 4s ease-in-out infinite;
}

.logo:hover i {
    transform: scale(1.1) rotate(-5deg);
}

.logo span {
    font-size: 22px;
    font-weight: 800;
    letter-spacing: -0.5px;
    background: var(--accent-gradient);
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
}

.collapse-btn {
    background: var(--bg-hover);
    border: 1px solid var(--border);
    color: var(--text-secondary);
    cursor: pointer;
    width: 34px;
    height: 34px;
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all var(--transition-fast);
    opacity: 0.6;
}

.collapse-btn:hover {
    background: var(--accent-primary);
    color: white;
    border-color: var(--accent-primary);
    opacity: 1;
}

.sidebar-nav {
    flex: 1;
    padding: 20px 12px;
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.nav-item {
    display: flex;
    align-items: center;
    gap: 14px;
    padding: 11px 14px;
    color: var(--text-secondary);
    text-decoration: none;
    border-radius: var(--radius-md);
    transition: all var(--transition-fast);
    font-weight: 500;
    position: relative;
    overflow: hidden;
}

.nav-item i {
    width: 22px;
    font-size: 1.1rem;
    text-align: center;
}

.nav-item:hover {
    background: var(--bg-hover);
    color: var(--accent-primary);
    transform: translateX(-3px);
}

.nav-item.active {
    background: var(--accent-gradient);
    color: white;
    box-shadow: 0 2px 12px rgba(220,38,38,0.3);
}

.nav-item.active i {
    color: white;
}

.sidebar-footer {
    padding: 16px 20px;
    border-top: 1px solid var(--border);
}

.status {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 13px;
    color: var(--text-muted);
    background: var(--bg-hover);
    padding: 10px 12px;
    border-radius: var(--radius-md);
}

.status i {
    font-size: 10px;
}

.pwa-install-btn {
    display: none;
    align-items: center;
    justify-content: center;
    gap: 8px;
    width: 100%;
    padding: 10px 12px;
    margin-bottom: 10px;
    background: var(--red-600);
    color: white;
    border: none;
    border-radius: var(--radius-md);
    font-family: inherit;
    font-size: 13px;
    font-weight: 500;
    cursor: pointer;
    transition: background var(--transition-fast);
}

.pwa-install-btn:hover {
    background: var(--red-500);
}

.online {
    color: var(--success);
    animation: pulse-green 2s infinite;
}

.main-content {
    margin-right: 280px;
    height: 100vh;
    overflow-y: auto;
    transition: margin-right var(--transition-normal);
}

.sidebar.collapsed ~ .main-content {
    margin-right: 80px;
}

.header {
    background: rgba(var(--bg-dark-rgb), 0.72);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    padding: 18px 32px;
    border-bottom: 1px solid var(--border);
    display: flex;
    justify-content: space-between;
    align-items: center;
    position: sticky;
    top: 0;
    z-index: 50;
    transition: background var(--transition-normal);
}

.header-title h1 {
    font-size: 26px;
    font-weight: 800;
    letter-spacing: -0.3px;
    background: var(--accent-gradient);
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
}

.header-title p {
    color: var(--text-secondary);
    font-size: 13px;
    margin-top: 2px;
}

.theme-toggle {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    width: 42px;
    height: 42px;
    cursor: pointer;
    color: var(--text-secondary);
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all var(--transition-fast);
}

.theme-toggle:hover {
    background: var(--accent-primary);
    color: white;
    transform: rotate(15deg) scale(1.05);
    box-shadow: var(--shadow-glow);
}

.mobile-menu-btn {
    display: none;
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    padding: 10px;
    cursor: pointer;
    color: var(--text-secondary);
    transition: all var(--transition-fast);
}

.mobile-menu-btn:hover {
    background: var(--accent-primary);
    color: white;
}

.pages-container {
    padding: 28px 32px;
    min-height: calc(100vh - 82px);
}

.page {
    display: none;
    animation: fadeInUp 0.45s cubic-bezier(0.16, 1, 0.3, 1);
}

.page.active {
    display: block;
}

/* ============================================
   4. SHARED COMPONENTS
   ============================================ */

/* 4.1 Buttons */
.btn-primary {
    background: var(--accent-gradient);
    color: white;
    border: none;
    padding: 11px 26px;
    border-radius: var(--radius-md);
    font-weight: 600;
    font-size: 0.9rem;
    cursor: pointer;
    transition: all var(--transition-fast);
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.3);
    display: inline-flex;
    align-items: center;
    gap: 8px;
    justify-content: center;
    position: relative;
    overflow: hidden;
}

.btn-primary::before {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(135deg, rgba(255,255,255,0.1), transparent);
    opacity: 0;
    transition: opacity var(--transition-fast);
}

.btn-primary:hover:not(:disabled) {
    transform: translateY(-2px);
    box-shadow: var(--shadow-red), var(--shadow-glow);
    filter: brightness(1.08);
}

.btn-primary:hover:not(:disabled)::before {
    opacity: 1;
}

.btn-primary:active:not(:disabled) {
    transform: translateY(0) scale(0.98);
    box-shadow: 0 1px 4px rgba(0,0,0,0.3);
}

.btn-primary:disabled {
    opacity: 0.4;
    cursor: not-allowed;
    filter: grayscale(0.5);
}

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

.btn-secondary {
    background: transparent;
    color: var(--accent-primary);
    border: 1.5px solid var(--accent-primary);
    padding: 10px 24px;
    border-radius: var(--radius-md);
    font-weight: 500;
    font-size: 0.9rem;
    cursor: pointer;
    transition: all var(--transition-fast);
    display: inline-flex;
    align-items: center;
    gap: 8px;
}

.btn-secondary:hover {
    background: var(--accent-soft);
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(220,38,38,0.15);
}

/* 4.2 Cards */
.convert-card,
.compress-card,
.encrypt-card,
.metadata-card,
.readme-card,
.intelligence-card {
    background: var(--bg-card);
    border-radius: var(--radius-xl);
    border: 1px solid var(--border);
    transition: all var(--transition-normal);
    position: relative;
    overflow: hidden;
    padding: 32px;
    box-shadow: 0 1px 3px rgba(0,0,0,0.2);
}

.convert-card,
.readme-card,
.intelligence-card { max-width: 900px; margin: 0 auto; }
.compress-card, .encrypt-card { max-width: 600px; margin: 0 auto; }
.metadata-card { max-width: 800px; margin: 0 auto; }

.convert-card::before,
.compress-card::before,
.encrypt-card::before,
.metadata-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 1px;
    background: linear-gradient(90deg, transparent, var(--accent-primary), transparent);
    opacity: 0;
    transition: opacity var(--transition-normal);
}

.convert-card:hover::before,
.compress-card:hover::before,
.encrypt-card:hover::before,
.metadata-card:hover::before {
    opacity: 1;
}

.convert-card:hover,
.compress-card:hover,
.encrypt-card:hover,
.metadata-card:hover,
.readme-card:hover,
.intelligence-card:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow-lg), var(--shadow-glow);
    border-color: var(--border-hover);
}

.readme-card h3,
.intelligence-card h3 {
    font-size: 1.35rem;
    margin-bottom: 8px;
    color: var(--text-primary);
    font-weight: 700;
}

.readme-card h3 i,
.intelligence-card h3 i {
    color: var(--accent-primary);
    margin-left: 10px;
}

.readme-card > p,
.intelligence-card > p {
    color: var(--text-secondary);
    font-size: 0.9rem;
    line-height: 1.7;
    margin-bottom: 20px;
}

/* 4.3 Upload Zones */
.upload-area,
.file-select-zone,
.folder-select-area {
    background: var(--bg-elevated);
    border: 2px dashed var(--border);
    border-radius: var(--radius-xl);
    padding: 48px 24px;
    text-align: center;
    cursor: pointer;
    transition: all var(--transition-normal);
    margin: 24px 0;
    position: relative;
}

.upload-area::before,
.file-select-zone::before,
.folder-select-area::before {
    content: '';
    position: absolute;
    inset: -2px;
    border-radius: inherit;
    border: 2px dashed transparent;
    transition: border-color var(--transition-normal);
    pointer-events: none;
}

.upload-area:hover,
.file-select-zone:hover,
.folder-select-area:hover {
    border-color: transparent;
    background: var(--accent-soft);
    transform: scale(1.01);
}

.upload-area:hover::before,
.file-select-zone:hover::before,
.folder-select-area:hover::before {
    border-color: var(--accent-primary);
    animation: dash-flow 0.8s linear infinite;
}

.upload-area i,
.file-select-zone i,
.folder-select-area i {
    font-size: 52px;
    color: var(--accent-primary);
    margin-bottom: 16px;
    transition: transform 0.3s cubic-bezier(0.34, 1.56, 0.64, 1);
    animation: float 3s ease-in-out infinite;
    display: inline-block;
}

.upload-area:hover i,
.file-select-zone:hover i {
    transform: scale(1.15);
    animation-duration: 1.5s;
}

#intelligenceZone {
    min-height: 120px;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 8px;
}

#intelligenceZone i {
    font-size: 48px;
    color: var(--accent-primary);
    animation: float 3s ease-in-out infinite;
}

/* 4.4 File List */
.files-preview {
    background: var(--bg-card);
    border-radius: var(--radius-lg);
    padding: 20px;
    margin-bottom: 24px;
    border: 1px solid var(--border);
}

.files-preview .preview-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 14px;
    padding-bottom: 12px;
    border-bottom: 1px solid var(--border);
    font-weight: 600;
    color: var(--text-secondary);
    font-size: 0.85rem;
}

.clear-files-btn {
    background: none;
    border: none;
    color: var(--error);
    cursor: pointer;
    font-size: 0.8rem;
    display: flex;
    align-items: center;
    gap: 6px;
    opacity: 0.7;
    transition: opacity var(--transition-fast);
}

.clear-files-btn:hover {
    opacity: 1;
}

.file-preview-item {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 10px;
    border-radius: var(--radius-sm);
    transition: background 0.2s;
}

.file-preview-item:hover {
    background: var(--bg-hover);
}

.file-preview-item:active {
    transform: scale(0.99);
}

.file-preview-item .file-name {
    flex: 1;
    font-size: 0.9rem;
    font-weight: 500;
}

.file-preview-item .file-size {
    font-size: 0.7rem;
    color: var(--text-muted);
}

.remove-file-item {
    background: none;
    border: none;
    color: var(--text-muted);
    cursor: pointer;
    width: 28px;
    height: 28px;
    border-radius: 50%;
    transition: all 0.2s;
    display: flex;
    align-items: center;
    justify-content: center;
}

.remove-file-item:hover {
    background: rgba(239, 68, 68, 0.2);
    color: var(--error);
    transform: scale(1.15);
}

/* 4.5 Progress Bar */
.progress-bar,
.progress-bar-container {
    background: var(--bg-hover);
    border-radius: 40px;
    height: 6px;
    overflow: hidden;
    margin: 16px 0;
}

.progress-fill {
    background: var(--accent-gradient);
    background-size: 200% 100%;
    animation: gradient-shift 2s linear infinite;
    height: 100%;
    width: 0%;
    border-radius: 40px;
    transition: width 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    position: relative;
    box-shadow: 0 0 8px rgba(220,38,38,0.4);
}

.progress-status {
    text-align: center;
    margin-top: 6px;
    font-size: 0.8rem;
    color: var(--text-muted);
    font-weight: 500;
}

.progress-container {
    margin: 20px 0;
}

.progress-container .progress-bar {
    height: 6px;
    background: var(--bg-hover);
    border-radius: 40px;
    overflow: hidden;
    margin: 0;
}

.progress-container .progress-fill {
    height: 100%;
    background: var(--accent-gradient);
    background-size: 200% 100%;
    animation: gradient-shift 2s linear infinite;
    border-radius: 40px;
    width: 0%;
    transition: width 0.3s ease;
    box-shadow: 0 0 8px rgba(220,38,38,0.4);
}

.progress-container .progress-status {
    text-align: center;
    margin-top: 8px;
    font-size: 0.8rem;
    color: var(--text-muted);
}

/* 4.6 Toast */
.toast-container {
    position: fixed;
    bottom: 24px;
    left: 24px;
    z-index: 1000;
    display: flex;
    flex-direction: column;
    gap: 10px;
    pointer-events: none;
}

.toast {
    background: var(--bg-card);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border: 1px solid var(--border);
    border-right: 3px solid;
    border-radius: var(--radius-md);
    padding: 14px 18px;
    display: flex;
    align-items: center;
    gap: 12px;
    box-shadow: var(--shadow-lg);
    animation: slideInLeft 0.35s cubic-bezier(0.16, 1, 0.3, 1);
    min-width: 300px;
    pointer-events: auto;
}

.toast.success { border-right-color: var(--success); }
.toast.error { border-right-color: var(--error); }
.toast.warning { border-right-color: var(--warning); }
.toast.info { border-right-color: var(--info); }

.toast i {
    font-size: 18px;
    width: 22px;
    text-align: center;
}
.toast.success i { color: var(--success); }
.toast.error i { color: var(--error); }
.toast.warning i { color: var(--warning); }
.toast.info i { color: var(--info); }

.toast-content { flex: 1; }
.toast-title { font-weight: 600; font-size: 0.85rem; margin-bottom: 2px; }
.toast-message { font-size: 0.75rem; color: var(--text-muted); }

/* 4.7 Form Elements */
.modern-select {
    background: var(--bg-input);
    color: var(--text-primary);
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    padding: 9px 14px;
    font-family: inherit;
    font-size: 0.85rem;
    cursor: pointer;
    min-width: 200px;
    transition: all var(--transition-fast);
    appearance: none;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 12 12'%3E%3Cpath fill='%23737373' d='M6 8L1 3h10z'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: left 12px center;
    padding-left: 36px;
}

.modern-select:hover {
    border-color: var(--accent-primary);
}

.modern-select:focus {
    outline: none;
    border-color: var(--accent-primary);
    box-shadow: 0 0 0 3px var(--accent-glow);
}

.modern-input {
    background: var(--bg-input);
    color: var(--text-primary);
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    padding: 9px 12px;
    font-family: inherit;
    font-size: 0.85rem;
    text-align: center;
    transition: all var(--transition-fast);
}

.modern-input:focus {
    outline: none;
    border-color: var(--accent-primary);
    box-shadow: 0 0 0 3px var(--accent-glow);
}

.custom-checkbox {
    display: flex;
    align-items: center;
    gap: 8px;
    cursor: pointer;
    color: var(--text-secondary);
    font-size: 0.85rem;
    user-select: none;
}

.custom-checkbox input[type="checkbox"] {
    appearance: none;
    width: 18px;
    height: 18px;
    border: 2px solid var(--border);
    border-radius: 5px;
    background: var(--bg-input);
    cursor: pointer;
    transition: all var(--transition-fast);
    flex-shrink: 0;
    position: relative;
}

.custom-checkbox input[type="checkbox"]:checked {
    background: var(--accent-primary);
    border-color: var(--accent-primary);
}

.custom-checkbox input[type="checkbox"]:checked::after {
    content: '';
    position: absolute;
    left: 4.5px;
    top: 1.5px;
    width: 5px;
    height: 9px;
    border: solid white;
    border-width: 0 2px 2px 0;
    transform: rotate(45deg);
    animation: check-in 0.15s ease;
}

.custom-checkbox input[type="checkbox"]:hover {
    border-color: var(--accent-primary);
}

.custom-checkbox input[type="checkbox"]:focus-visible {
    outline: 2px solid var(--accent-primary);
    outline-offset: 2px;
}

/* ============================================
   5. PAGE: CONVERT
   ============================================ */
.convert-options-panel {
    background: var(--bg-card);
    border-radius: var(--radius-xl);
    padding: 24px;
    margin: 24px 0;
    border: 1px solid var(--border);
}

.option-group {
    margin-bottom: 20px;
}

.option-group label {
    display: block;
    margin-bottom: 12px;
    font-weight: 600;
    color: var(--text-secondary);
    font-size: 0.9rem;
}

.target-formats {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
}

.format-btn {
    background: var(--bg-hover);
    border: 1px solid var(--border);
    border-radius: 40px;
    padding: 7px 18px;
    font-size: 0.8rem;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.2s;
    color: var(--text-secondary);
}

.format-btn:hover {
    border-color: var(--accent-primary);
    color: var(--accent-primary);
    background: var(--accent-soft);
    transform: translateY(-1px);
}

.format-btn.active {
    background: var(--accent-gradient);
    color: white;
    border: none;
    box-shadow: 0 4px 12px rgba(220, 38, 38, 0.35);
}

.advanced-settings details {
    background: var(--bg-hover);
    border-radius: var(--radius-lg);
    padding: 12px;
    margin: 16px 0;
}

.advanced-settings summary {
    cursor: pointer;
    font-weight: 500;
    font-size: 0.85rem;
    color: var(--accent-primary);
    user-select: none;
}

.advanced-settings summary:hover {
    opacity: 0.8;
}

.convert-options-panel .setting-item {
    margin: 12px 0;
    display: flex;
    align-items: center;
    gap: 12px;
    flex-wrap: wrap;
}

.convert-options-panel .setting-item label {
    font-size: 0.8rem;
    color: var(--text-muted);
    font-weight: 400;
}

.convert-options-panel .setting-item input[type="range"] {
    flex: 1;
    min-width: 150px;
    accent-color: var(--accent-primary);
}

.convert-result-modern {
    margin-top: 24px;
}

.result-card-modern {
    background: linear-gradient(135deg, rgba(16, 185, 129, 0.08), rgba(16, 185, 129, 0.02));
    border: 1px solid rgba(16, 185, 129, 0.25);
    border-radius: var(--radius-xl);
    padding: 32px;
    text-align: center;
    backdrop-filter: blur(8px);
}

.success-icon {
    font-size: 52px;
    color: var(--success);
    margin-bottom: 16px;
    animation: bounce 0.5s ease;
    display: inline-block;
}

.result-card-modern h4 {
    margin-bottom: 20px;
    font-weight: 700;
    color: var(--text-primary);
}

/* ============================================
   6. PAGE: COMPRESS
   ============================================ */
.compress-level {
    margin: 24px 0;
}

.compress-level label {
    display: block;
    margin-bottom: 12px;
    color: var(--text-secondary);
    font-weight: 600;
    font-size: 0.9rem;
}

.level-buttons {
    display: flex;
    gap: 8px;
    flex-wrap: wrap;
}

.level-btn {
    background: var(--bg-hover);
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    padding: 8px 20px;
    color: var(--text-secondary);
    cursor: pointer;
    transition: all var(--transition-fast);
    font-weight: 500;
    font-size: 0.85rem;
    flex: 1;
    min-width: 70px;
}

.level-btn:hover {
    border-color: var(--accent-primary);
    color: var(--accent-primary);
    background: var(--accent-soft);
}

.level-btn.active {
    background: var(--accent-gradient);
    color: white;
    border: none;
    box-shadow: 0 2px 8px rgba(220,38,38,0.3);
}

.compress-info {
    background: var(--bg-hover);
    border-radius: var(--radius-lg);
    padding: 20px;
    margin: 24px 0;
}

.info-row {
    display: flex;
    justify-content: space-between;
    padding: 9px 0;
    border-bottom: 1px solid var(--border);
    font-size: 0.85rem;
}

.info-row:last-child {
    border-bottom: none;
}

.info-row span {
    color: var(--text-secondary);
}

.info-row strong {
    color: var(--text-primary);
    font-weight: 600;
}

/* ============================================
   7. PAGE: ENCRYPT
   ============================================ */
.encrypt-tabs {
    display: flex;
    gap: 8px;
    margin: 24px 0;
    background: var(--bg-hover);
    padding: 4px;
    border-radius: var(--radius-md);
}

.tab-btn {
    flex: 1;
    background: transparent;
    border: none;
    border-radius: calc(var(--radius-md) - 2px);
    padding: 10px;
    color: var(--text-secondary);
    cursor: pointer;
    transition: all var(--transition-fast);
    font-weight: 500;
    font-size: 0.85rem;
}

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

.tab-btn.active {
    background: var(--bg-card);
    color: var(--accent-primary);
    box-shadow: 0 1px 4px rgba(0,0,0,0.2);
    font-weight: 600;
}

.password-field {
    margin: 24px 0;
}

.password-field > label {
    display: block;
    margin-bottom: 10px;
    color: var(--text-secondary);
    font-weight: 600;
    font-size: 0.9rem;
}

.password-input-wrapper {
    display: flex;
    gap: 8px;
}

.password-input-wrapper input {
    flex: 1;
    background: var(--bg-input);
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    padding: 12px;
    color: var(--text-primary);
    transition: all var(--transition-fast);
    font-size: 0.9rem;
    font-family: inherit;
}

.password-input-wrapper input:focus {
    outline: none;
    border-color: var(--accent-primary);
    box-shadow: 0 0 0 3px var(--accent-glow);
}

.password-input-wrapper input::placeholder {
    color: var(--text-muted);
    font-size: 0.8rem;
}

.toggle-password {
    background: var(--bg-hover);
    border: none;
    border-radius: var(--radius-md);
    padding: 0 14px;
    cursor: pointer;
    color: var(--text-secondary);
    transition: all var(--transition-fast);
    display: flex;
    align-items: center;
}

.toggle-password:hover {
    background: var(--accent-primary);
    color: white;
}

.password-strength {
    display: flex;
    align-items: center;
    gap: 5px;
    margin-top: 10px;
}

.strength-bar {
    flex: 1;
    height: 4px;
    background: var(--bg-hover);
    border-radius: 4px;
    transition: background 0.3s;
}

.strength-bar.weak { background: var(--error); }
.strength-bar.medium { background: var(--warning); }
.strength-bar.strong { background: var(--success); }

.strength-text {
    font-size: 11px;
    color: var(--text-muted);
    margin-right: 8px;
    min-width: 80px;
}

/* ============================================
   8. PAGE: METADATA
   ============================================ */
.metadata-result {
    margin-top: 24px;
}

.metadata-header {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 16px;
    background: var(--bg-hover);
    border-radius: var(--radius-lg);
    margin-bottom: 16px;
}

.metadata-header i {
    font-size: 22px;
    color: var(--accent-primary);
}

.metadata-header span {
    font-weight: 600;
    color: var(--text-primary);
}

.metadata-content {
    background: var(--bg-hover);
    border-radius: var(--radius-lg);
    padding: 16px;
}

.metadata-group {
    margin-bottom: 24px;
}

.metadata-group:last-child {
    margin-bottom: 0;
}

.metadata-group h4 {
    color: var(--accent-primary);
    margin-bottom: 12px;
    font-size: 0.95rem;
    font-weight: 600;
    display: flex;
    align-items: center;
    gap: 8px;
}

.metadata-item {
    display: flex;
    padding: 9px 0;
    border-bottom: 1px solid var(--border);
    font-size: 0.85rem;
}

.metadata-item:last-child {
    border-bottom: none;
}

.metadata-key {
    width: 150px;
    color: var(--text-muted);
    font-weight: 500;
    flex-shrink: 0;
}

.metadata-value {
    flex: 1;
    font-family: 'JetBrains Mono', monospace;
    word-break: break-word;
    color: var(--text-secondary);
}

/* ============================================
   9. PAGE: README
   ============================================ */
.folder-select-group {
    display: flex;
    align-items: center;
    gap: 16px;
    margin: 20px 0;
    flex-wrap: wrap;
}

.folder-select-area {
    flex: 1;
    padding: 24px;
    min-height: 100px;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 8px;
    margin: 0;
}

.folder-select-area i {
    font-size: 34px;
}

.folder-select-area p {
    color: var(--text-secondary);
    font-size: 0.9rem;
    margin: 0;
}

.folder-select-area .folder-path {
    font-size: 0.8rem;
    color: var(--text-muted);
    direction: ltr;
    word-break: break-all;
    background: var(--bg-hover);
    padding: 4px 10px;
    border-radius: var(--radius-sm);
    max-width: 100%;
}

#selectFolderBtn {
    flex-shrink: 0;
}

.settings-group {
    background: var(--bg-elevated);
    border-radius: var(--radius-lg);
    padding: 20px;
    margin: 20px 0;
    border: 1px solid var(--border);
}

.settings-row {
    display: flex;
    flex-wrap: wrap;
    gap: 24px;
    margin-bottom: 14px;
}

.settings-row:last-child {
    margin-bottom: 0;
}

.settings-group .setting-item {
    display: flex;
    align-items: center;
    gap: 10px;
    flex-wrap: wrap;
}

.settings-group .setting-item label {
    color: var(--text-secondary);
    font-weight: 500;
    font-size: 0.85rem;
}

.preview-group {
    margin-top: 24px;
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    overflow: hidden;
}

.preview-group .preview-header {
    background: var(--bg-hover);
    padding: 12px 20px;
    border-bottom: 1px solid var(--border);
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-weight: 500;
    color: var(--text-secondary);
    font-size: 0.85rem;
}

.preview-content {
    padding: 20px;
    max-height: 400px;
    overflow-y: auto;
    background: var(--bg-card);
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.85rem;
    line-height: 1.7;
    color: var(--text-primary);
    white-space: pre-wrap;
    word-wrap: break-word;
}

.preview-content pre {
    margin: 0;
    white-space: pre-wrap;
    word-wrap: break-word;
}

.preview-content .html-preview {
    font-family: inherit;
    white-space: normal;
}

/* ============================================
   10. PAGE: INTELLIGENCE
   ============================================ */
.intelligence-result {
    animation: fadeIn 0.5s ease;
}

.intelligence-content {
    background: var(--bg-elevated);
    border-radius: var(--radius-lg);
    padding: 24px;
    border: 1px solid var(--border);
}

.intelligence-content .report-section {
    margin-bottom: 24px;
}

.intelligence-content .report-section:last-child {
    margin-bottom: 0;
}

.intelligence-content .report-section h3 {
    font-size: 1.05rem;
    color: var(--accent-primary);
    margin-bottom: 14px;
    display: flex;
    align-items: center;
    gap: 10px;
    font-weight: 700;
}

.intelligence-content .info-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 10px;
}

.intelligence-content .info-item {
    background: var(--bg-hover);
    padding: 12px 16px;
    border-radius: var(--radius-md);
}

.intelligence-content .info-label {
    display: block;
    font-size: 0.7rem;
    color: var(--text-muted);
    margin-bottom: 4px;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.intelligence-content .info-value {
    font-weight: 600;
    color: var(--text-primary);
    font-size: 0.9rem;
}

.intelligence-content .metadata-group {
    margin-bottom: 16px;
}

.intelligence-content .metadata-group:last-child {
    margin-bottom: 0;
}

.intelligence-content .metadata-group h4 {
    color: var(--text-secondary);
    margin-bottom: 8px;
    font-size: 0.85rem;
    font-weight: 600;
}

.intelligence-content .metadata-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 8px;
}

.intelligence-content .metadata-item {
    background: var(--bg-hover);
    padding: 8px 12px;
    border-radius: var(--radius-sm);
    display: flex;
    flex-direction: column;
    border-bottom: none;
}

.intelligence-content .meta-key {
    font-size: 0.65rem;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.3px;
}

.intelligence-content .meta-value {
    font-size: 0.85rem;
    color: var(--text-primary);
    word-break: break-word;
    font-weight: 500;
}

.intelligence-content .security-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 8px;
}

.intelligence-content .security-item {
    background: var(--bg-hover);
    padding: 10px 14px;
    border-radius: var(--radius-sm);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.intelligence-content .security-label {
    color: var(--text-secondary);
    font-size: 0.85rem;
}

.intelligence-content .security-value {
    font-weight: 600;
    font-size: 0.85rem;
}

.intelligence-content .security-value.success { color: var(--success); }
.intelligence-content .security-value.warning { color: var(--warning); }
.intelligence-content .security-value.danger { color: var(--error); }
.intelligence-content .security-value.risk-کم { color: var(--success); }
.intelligence-content .security-value.risk-متوسط { color: var(--warning); }
.intelligence-content .security-value.risk-زیاد { color: var(--error); }

.intelligence-content .risks-list {
    margin-top: 12px;
}

.intelligence-content .risks-list h4 {
    font-size: 0.85rem;
    color: var(--text-secondary);
    margin-bottom: 8px;
}

.intelligence-content .risks-list ul {
    list-style: none;
    padding: 0;
}

.intelligence-content .risks-list li {
    padding: 6px 12px;
    margin: 4px 0;
    background: var(--bg-hover);
    border-radius: var(--radius-sm);
    font-size: 0.85rem;
    color: var(--text-primary);
}

.intelligence-content .suggestions-list,
.intelligence-content .insights-list {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.intelligence-content .suggestion-item,
.intelligence-content .insight-item {
    padding: 10px 16px;
    background: var(--bg-hover);
    border-radius: var(--radius-sm);
    font-size: 0.88rem;
    color: var(--text-primary);
    border-right: 3px solid var(--accent-primary);
}

.intelligence-content .apps-grid {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
}

.intelligence-content .app-tag {
    padding: 4px 14px;
    background: var(--accent-gradient);
    color: white;
    border-radius: 20px;
    font-size: 0.8rem;
    font-weight: 500;
    transition: transform var(--transition-fast);
}

.intelligence-content .app-tag:hover {
    transform: scale(1.05);
}

.intelligence-content .no-metadata {
    color: var(--text-muted);
    text-align: center;
    padding: 20px;
    font-size: 0.9rem;
}

.intelligence-content .scores-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(170px, 1fr));
    gap: 16px;
    margin-bottom: 24px;
}

.intelligence-content .score-card {
    background: var(--bg-hover);
    padding: 20px;
    border-radius: var(--radius-md);
    text-align: center;
    border: 1px solid var(--border);
    transition: all var(--transition-fast);
}

.intelligence-content .score-card:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.intelligence-content .score-circle {
    width: 72px;
    height: 72px;
    margin: 0 auto 12px;
    position: relative;
}

.intelligence-content .score-circle svg {
    width: 100%;
    height: 100%;
    transform: rotate(-90deg);
}

.intelligence-content .score-circle .score-text {
    font-size: 18px;
    font-weight: 700;
    fill: var(--text-primary);
    text-anchor: middle;
    dominant-baseline: central;
    transform: rotate(90deg);
}

.intelligence-content .score-card h4 {
    font-size: 0.85rem;
    color: var(--text-secondary);
    margin-bottom: 4px;
}

.intelligence-content .score-card p {
    font-size: 0.75rem;
    color: var(--text-muted);
}

.intelligence-content .report-footer {
    margin-top: 24px;
    padding-top: 16px;
    border-top: 1px solid var(--border);
    text-align: center;
    color: var(--text-muted);
    font-size: 0.8rem;
}

.intelligence-content .report-footer .report-note {
    margin-top: 4px;
    font-size: 0.7rem;
    color: var(--text-muted);
}

.intelligence-content .report-header {
    display: flex;
    align-items: center;
    gap: 16px;
    padding-bottom: 16px;
    margin-bottom: 24px;
    border-bottom: 1px solid var(--border);
    flex-wrap: wrap;
}

.intelligence-content .report-header .report-icon i {
    font-size: 32px;
    color: var(--accent-primary);
}

.intelligence-content .report-header .report-title h2 {
    font-size: 1.15rem;
    font-weight: 700;
    color: var(--text-primary);
}

.intelligence-content .report-header .report-title p {
    font-size: 0.8rem;
    color: var(--text-muted);
}

.intelligence-content .report-header .report-actions {
    margin-right: auto;
}

/* ============================================
   11. ANIMATIONS (@keyframes)
   ============================================ */
@keyframes pulse-green {
    0%, 100% { opacity: 0.5; transform: scale(0.9); }
    50% { opacity: 1; transform: scale(1.15); }
}

@keyframes fadeInUp {
    from { opacity: 0; transform: translateY(20px); }
    to { opacity: 1; transform: translateY(0); }
}

@keyframes bounce {
    0%, 100% { transform: scale(1); }
    50% { transform: scale(1.15); }
}

@keyframes slideInLeft {
    from { opacity: 0; transform: translateX(-60px); }
    to { opacity: 1; transform: translateX(0); }
}

@keyframes slideOutRight {
    from { opacity: 1; transform: translateX(0); }
    to { opacity: 0; transform: translateX(60px); }
}

@keyframes float {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-8px); }
}

@keyframes logo-float {
    0%, 100% { transform: translateY(0) rotate(0deg); }
    25% { transform: translateY(-3px) rotate(-3deg); }
    75% { transform: translateY(-3px) rotate(3deg); }
}

@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

@keyframes gradient-shift {
    0% { background-position: 0% 50%; }
    50% { background-position: 100% 50%; }
    100% { background-position: 0% 50%; }
}

@keyframes dash-flow {
    to { stroke-dashoffset: -20; }
}

@keyframes check-in {
    0% { opacity: 0; transform: rotate(45deg) scale(0); }
    100% { opacity: 1; transform: rotate(45deg) scale(1); }
}

/* ============================================
   12. RESPONSIVE (@media)
   ============================================ */
@media (max-width: 1024px) {
    .pages-container { padding: 24px; }
    .convert-card, .compress-card, .encrypt-card, .metadata-card,
    .readme-card, .intelligence-card { padding: 28px; }
}

@media (max-width: 768px) {
    .sidebar {
        transform: translateX(100%);
        position: fixed;
        z-index: 200;
        width: 260px;
        background: rgba(var(--bg-sidebar-rgb), 0.98);
    }
    .sidebar.mobile-open { transform: translateX(0); }
    .main-content { margin-right: 0 !important; }
    .mobile-menu-btn { display: block; margin-left: 16px; }

    .header { padding: 14px 20px; }
    .header-title h1 { font-size: 20px; }
    .header-title p { font-size: 12px; }
    .pages-container { padding: 16px; }

    .upload-area, .file-select-zone, .folder-select-area {
        padding: 32px 16px;
    }
    .upload-area i, .file-select-zone i { font-size: 40px; }

    .target-formats { justify-content: center; }
    .format-btn { padding: 6px 14px; font-size: 0.75rem; }
    .level-buttons { justify-content: center; }
    .level-btn { padding: 6px 14px; font-size: 0.8rem; }

    .metadata-item { flex-direction: column; gap: 2px; }
    .metadata-key { width: 100%; margin-bottom: 2px; font-size: 0.75rem; }

    .toast { min-width: 0; width: calc(100vw - 32px); max-width: 360px; }

    .readme-card,
    .intelligence-card {
        padding: 20px;
    }
    .settings-row {
        flex-direction: column;
        gap: 12px;
    }
    .settings-group .setting-item {
        width: 100%;
    }
    .modern-select {
        min-width: 100%;
    }
    .folder-select-group {
        flex-direction: column;
    }
    .folder-select-area {
        width: 100%;
        min-height: 80px;
    }
    #selectFolderBtn {
        width: 100%;
        justify-content: center;
    }
    .preview-content {
        max-height: 250px;
        font-size: 0.75rem;
        padding: 12px;
    }

    .intelligence-content {
        padding: 16px;
    }
    .intelligence-content .scores-grid {
        grid-template-columns: 1fr 1fr;
    }
    .intelligence-content .info-grid,
    .intelligence-content .metadata-grid,
    .intelligence-content .security-grid {
        grid-template-columns: 1fr;
    }
    .intelligence-content .report-header {
        flex-direction: column;
        align-items: flex-start;
    }
    .intelligence-content .report-header .report-actions {
        margin-right: 0;
        width: 100%;
    }
    .intelligence-content .report-header .report-actions button {
        width: 100%;
    }
}

@media (max-width: 480px) {
    .pages-container { padding: 12px; }
    .convert-card, .compress-card, .encrypt-card, .metadata-card,
    .readme-card, .intelligence-card { padding: 18px; }
    .btn-primary, .btn-secondary { padding: 10px 18px; font-size: 0.82rem; }
    .level-buttons { gap: 6px; }
    .level-btn { min-width: 60px; font-size: 0.75rem; }
    .settings-group .setting-item { flex-direction: column; align-items: flex-start; }
    .settings-group .setting-item input[type="range"] { width: 100%; }

    .intelligence-content .scores-grid {
        grid-template-columns: 1fr;
    }
}

@media (prefers-reduced-motion: reduce) {
    *, *::before, *::after {
        animation-duration: 0.01ms !important;
        transition-duration: 0.01ms !important;
    }
}

@media (prefers-color-scheme: light) {
    body:not(.light-mode) {
        --bg-dark: #f5f7fa;
        --bg-sidebar: #ffffff;
        --bg-card: #ffffff;
        --bg-hover: #eef1f5;
        --bg-dark-rgb: 245, 247, 250;
        --text-primary: #0f172a;
        --text-secondary: #334155;
        --border: rgba(0, 0, 0, 0.07);
    }
}