:root {
    --primary: #0d9488;
    --primary-dark: #0f766e;
    --primary-light: #ccfbf1;
    --slate-900: #0f172a;
    --slate-700: #334155;
    --slate-500: #64748b;
    --slate-400: #94a3b8;
    --slate-300: #cbd5e1;
    --slate-200: #e2e8f0;
    --slate-100: #f1f5f9;
    --slate-50: #f8fafc;
    --white: #ffffff;
    --danger: #ef4444;
    --success: #10b981;
    --warning: #f59e0b;
    --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.05);
    --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.1);
    --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.1);
    --radius: 12px;
    --radius-sm: 8px;
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

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

body {
    font-family: 'Tajawal', system-ui, sans-serif;
    background-color: var(--slate-50);
    color: var(--slate-700);
    line-height: 1.6;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    -webkit-tap-highlight-color: transparent;
}

.container {
    width: 100%;
    max-width: 1100px;
    margin: 0 auto;
    padding: 0 1rem;
}

/* Loading */
.loading-overlay {
    position: fixed;
    top: 0; left: 0;
    width: 100%; height: 100%;
    background: var(--white);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    z-index: 9999;
    transition: opacity 0.3s ease;
}
.loading-overlay.hidden { opacity: 0; pointer-events: none; }
.spinner {
    width: 50px; height: 50px;
    border: 4px solid var(--slate-200);
    border-top-color: var(--primary);
    border-radius: 50%;
    animation: spin 1s linear infinite;
}
@keyframes spin { to { transform: rotate(360deg); } }
.loading-overlay p { margin-top: 1rem; color: var(--slate-500); }

/* Header */
.app-header {
    background: var(--white);
    border-bottom: 1px solid var(--slate-100);
    padding: 0.75rem 0;
    position: sticky;
    top: 0;
    z-index: 100;
    box-shadow: var(--shadow-sm);
}
.header-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
}
.brand { display: flex; align-items: center; gap: 0.5rem; }
.logo { font-size: 2rem; }
.brand-text h1 {
    font-size: 1.25rem;
    font-weight: 800;
    color: var(--primary);
    line-height: 1;
}
.brand-en {
    font-weight: 500;
    color: var(--slate-500);
    font-size: 0.8rem;
}
.security-badge {
    display: flex;
    align-items: center;
    gap: 0.25rem;
    background: var(--primary-light);
    color: var(--primary-dark);
    padding: 0.4rem 0.75rem;
    border-radius: 50px;
    font-size: 0.75rem;
    font-weight: 600;
}

/* Tabs System */
.main-tabs-container {
    padding-bottom: 80px;
    display: flex;
    flex-direction: column;
    min-height: calc(100vh - 60px);
}

.tab-pane {
    display: none;
    animation: fadeIn 0.3s ease;
}
.tab-pane.active { display: block; }

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

/* Bottom Navigation */
.bottom-nav {
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    background: var(--white);
    border-top: 1px solid var(--slate-200);
    display: flex;
    justify-content: space-around;
    padding: 0.5rem 0 calc(0.5rem + env(safe-area-inset-bottom));
    z-index: 1000;
    box-shadow: 0 -4px 20px rgba(0,0,0,0.05);
}

.nav-item {
    background: none;
    border: none;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.2rem;
    color: var(--slate-500);
    font-family: inherit;
    cursor: pointer;
    padding: 0.4rem;
    transition: var(--transition);
    flex: 1;
    -webkit-tap-highlight-color: transparent;
}

.nav-item .nav-icon { font-size: 1.4rem; transition: transform 0.2s ease; }
.nav-item .nav-label { font-size: 0.7rem; font-weight: 600; }
.nav-item.active { color: var(--primary); }
.nav-item.active .nav-icon { transform: translateY(-2px); }

/* Desktop Tabs */
.desktop-tabs {
    display: none;
    background: var(--white);
    border-radius: var(--radius);
    padding: 0.5rem;
    margin-bottom: 1rem;
    box-shadow: var(--shadow-sm);
    border: 1px solid var(--slate-100);
}

.desktop-tab-btn {
    flex: 1;
    padding: 0.75rem 1rem;
    background: none;
    border: none;
    border-radius: var(--radius-sm);
    cursor: pointer;
    font-family: inherit;
    font-weight: 600;
    font-size: 0.95rem;
    color: var(--slate-500);
    transition: var(--transition);
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
}

.desktop-tab-btn:hover { background: var(--slate-50); }
.desktop-tab-btn.active { background: var(--primary); color: var(--white); }

/* Cards */
.card {
    background: var(--white);
    border-radius: var(--radius);
    padding: 1.25rem;
    margin-bottom: 1rem;
    box-shadow: var(--shadow-md);
    border: 1px solid var(--slate-100);
}

.section-header {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    margin-bottom: 1rem;
    flex-wrap: wrap;
}
.section-title { font-size: 1.25rem; font-weight: 700; color: var(--slate-900); }
.section-badge {
    background: var(--primary-light);
    color: var(--primary-dark);
    padding: 0.2rem 0.6rem;
    border-radius: 50px;
    font-size: 0.75rem;
    font-weight: 600;
}

/* Forms */
.form-group { margin-bottom: 0.75rem; }
label {
    display: block;
    font-weight: 600;
    margin-bottom: 0.4rem;
    color: var(--slate-700);
    font-size: 0.85rem;
}
.styled-input, .styled-select {
    width: 100%;
    padding: 0.7rem 0.9rem;
    border: 1.5px solid var(--slate-300);
    border-radius: var(--radius-sm);
    font-family: inherit;
    font-size: 0.95rem;
    color: var(--slate-900);
    background: var(--white);
    transition: var(--transition);
}
.styled-input:focus, .styled-select:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(13, 148, 136, 0.1);
}

/* Guide Box */
.guide-box {
    background: linear-gradient(135deg, var(--primary-light), #e0f2fe);
    border: 2px solid var(--primary);
    border-radius: var(--radius);
    padding: 1rem;
    margin-bottom: 1rem;
}
.guide-box h3 { color: var(--primary-dark); font-size: 1rem; margin-bottom: 0.5rem; }
.guide-list { list-style: none; padding: 0; }
.guide-list li { padding: 0.3rem 0; font-size: 0.85rem; color: var(--slate-700); }
.guide-list strong { color: var(--primary-dark); }

/* Target Size */
.target-size-group { margin-bottom: 1rem; }
.size-input-wrapper { position: relative; display: flex; align-items: center; }
.size-input-wrapper .styled-input { padding-right: 3.5rem; }
.size-suffix {
    position: absolute;
    right: 0.75rem;
    font-weight: 700;
    color: var(--primary);
    pointer-events: none;
}

/* Mode Buttons */
.compression-mode-group { margin-bottom: 1rem; }
.mode-buttons { display: flex; gap: 0.5rem; }
.mode-btn {
    flex: 1;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.3rem;
    padding: 0.75rem;
    background: var(--white);
    border: 2px solid var(--slate-200);
    border-radius: var(--radius-sm);
    cursor: pointer;
    transition: var(--transition);
    font-family: inherit;
    font-size: 0.85rem;
    color: var(--slate-700);
}
.mode-btn span:first-child { font-size: 1.3rem; }
.mode-btn:hover { border-color: var(--primary); }
.mode-btn.active {
    border-color: var(--primary);
    background: var(--primary);
    color: var(--white);
}

/* Dropzone */
.dropzone {
    border: 2px dashed var(--slate-300);
    border-radius: var(--radius);
    padding: 2rem 1rem;
    text-align: center;
    cursor: pointer;
    transition: var(--transition);
    background: var(--slate-50);
}
.dropzone:hover, .dropzone.dragover {
    border-color: var(--primary);
    background: var(--primary-light);
}
.dropzone-sm { padding: 1.5rem 1rem; }
.dropzone-icon { font-size: 2.5rem; display: block; margin-bottom: 0.5rem; }
.dropzone-text { font-size: 1rem; font-weight: 600; color: var(--slate-700); margin-bottom: 0.25rem; }
.dropzone-formats { font-size: 0.75rem; color: var(--slate-400); }

/* Progress */
.progress-container { margin-top: 1rem; }
.progress-bar {
    width: 100%;
    height: 8px;
    background: var(--slate-100);
    border-radius: 4px;
    overflow: hidden;
    margin-bottom: 0.5rem;
}
.progress-fill {
    height: 100%;
    background: linear-gradient(90deg, var(--primary), var(--primary-dark));
    width: 0%;
    transition: width 0.3s ease;
}
.progress-text { font-size: 0.9rem; color: var(--slate-700); text-align: center; font-weight: 600; }
.progress-subtext { font-size: 0.8rem; color: var(--slate-500); text-align: center; }

/* Result */
.result-container {
    margin-top: 1rem;
    padding: 1rem;
    background: var(--slate-50);
    border-radius: var(--radius);
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 0.75rem;
    flex-wrap: wrap;
}
.result-info { display: flex; align-items: center; gap: 0.75rem; flex: 1; }
.result-icon { font-size: 1.75rem; }
.result-title { font-weight: 600; color: var(--slate-900); font-size: 0.95rem; }
.result-size { font-size: 0.85rem; color: var(--slate-700); }
.result-stats { font-size: 0.75rem; color: var(--slate-500); }

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.4rem;
    padding: 0.7rem 1.25rem;
    border: none;
    border-radius: var(--radius-sm);
    font-family: inherit;
    font-size: 0.9rem;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
    white-space: nowrap;
}
.btn-primary { background: var(--primary); color: var(--white); }
.btn-primary:hover:not(:disabled) { background: var(--primary-dark); }
.btn-secondary { background: var(--white); color: var(--slate-700); border: 1.5px solid var(--slate-300); }
.btn:disabled { opacity: 0.5; cursor: not-allowed; }
.btn-sm { padding: 0.4rem 0.75rem; font-size: 0.8rem; }

/* PDF Options */
.pdf-options { display: grid; grid-template-columns: 1fr 1fr; gap: 0.75rem; margin-bottom: 1rem; }

/* =========================================
   Multi-Image Upload (صور متعددة)
   ========================================= */
.multi-image-upload-buttons {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 0.75rem;
    margin-bottom: 1.5rem;
}

.multi-image-upload-buttons .upload-btn {
    padding: 1rem 0.75rem;
    font-size: 0.95rem;
    flex-direction: column;
    gap: 0.4rem;
}

.multi-image-upload-buttons .upload-btn span:first-child {
    font-size: 1.5rem;
}

/* Images Preview Area */
.images-preview-area {
    margin-top: 1.5rem;
    padding: 1rem;
    background: var(--slate-50);
    border-radius: var(--radius);
    border: 1px solid var(--slate-200);
}

.preview-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1rem;
    padding-bottom: 0.75rem;
    border-bottom: 1px solid var(--slate-200);
}

.preview-header h3 {
    font-size: 1rem;
    font-weight: 700;
    color: var(--slate-900);
    margin: 0;
}

/* Images Grid */
.images-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(120px, 1fr));
    gap: 0.75rem;
    max-height: 400px;
    overflow-y: auto;
    padding: 0.5rem;
}

.image-grid-item {
    position: relative;
    background: var(--white);
    border-radius: var(--radius-sm);
    overflow: hidden;
    box-shadow: var(--shadow-sm);
    transition: var(--transition);
    border: 2px solid transparent;
}

.image-grid-item:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
    border-color: var(--primary);
}

.image-grid-item img {
    width: 100%;
    height: 120px;
    object-fit: cover;
    display: block;
}

.image-grid-item-number {
    position: absolute;
    top: 4px;
    right: 4px;
    background: var(--primary);
    color: var(--white);
    width: 24px;
    height: 24px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.75rem;
    font-weight: 700;
    box-shadow: var(--shadow-sm);
}

.image-grid-item-remove {
    position: absolute;
    top: 4px;
    left: 4px;
    background: var(--danger);
    color: var(--white);
    border: none;
    border-radius: 50%;
    width: 24px;
    height: 24px;
    cursor: pointer;
    font-size: 0.9rem;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: var(--transition);
    box-shadow: var(--shadow-sm);
}

.image-grid-item-remove:hover {
    transform: scale(1.1);
    background: #dc2626;
}

.image-grid-item-info {
    padding: 0.4rem;
    font-size: 0.7rem;
    color: var(--slate-500);
    text-align: center;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    background: var(--white);
}

/* Empty State */
.empty-state {
    text-align: center;
    padding: 3rem 1rem;
    color: var(--slate-400);
}

.empty-icon {
    font-size: 4rem;
    display: block;
    margin-bottom: 1rem;
    opacity: 0.5;
}

.empty-state p {
    font-size: 1rem;
    margin-bottom: 0.5rem;
}

.empty-hint {
    font-size: 0.85rem;
    color: var(--slate-400);
}

/* Images Actions */
.images-actions { display: flex; gap: 0.75rem; margin-top: 1rem; justify-content: center; }
.images-actions .btn { flex: 1; max-width: 150px; }

/* =========================================
   Scanner - مع الشبكة الإرشادية
   ========================================= */
.scanner-layout {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.scanner-preview-wrapper {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}

.scanner-preview {
    background: var(--slate-100);
    border-radius: var(--radius);
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 250px;
    position: relative;
    overflow: hidden;
}

#scanner-canvas {
    max-width: 100%;
    max-height: 400px;
    display: none;
    border-radius: var(--radius-sm);
    touch-action: none;
}

.preview-placeholder { color: var(--slate-500); text-align: center; }
.placeholder-icon { font-size: 3rem; display: block; margin-bottom: 0.5rem; opacity: 0.5; }

/* Alignment Grid */
.alignment-grid {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    pointer-events: none;
    display: none;
    z-index: 5;
}

.alignment-grid.active {
    display: block;
}

.grid-line-vertical {
    position: absolute;
    top: 0;
    bottom: 0;
    width: 1px;
    background: rgba(255, 255, 255, 0.4);
    box-shadow: 0 0 2px rgba(0, 0, 0, 0.3);
}

.grid-line-vertical:nth-child(1) { left: 33.333%; }
.grid-line-vertical:nth-child(2) { left: 66.666%; }

.grid-line-horizontal {
    position: absolute;
    left: 0;
    right: 0;
    height: 1px;
    background: rgba(255, 255, 255, 0.4);
    box-shadow: 0 0 2px rgba(0, 0, 0, 0.3);
}

.grid-line-horizontal:nth-child(3) { top: 33.333%; }
.grid-line-horizontal:nth-child(4) { top: 66.666%; }

.grid-corner {
    position: absolute;
    width: 20px;
    height: 20px;
    border: 2px solid rgba(255, 255, 255, 0.6);
}

.grid-corner.tl {
    top: 10px;
    left: 10px;
    border-right: none;
    border-bottom: none;
}

.grid-corner.tr {
    top: 10px;
    right: 10px;
    border-left: none;
    border-bottom: none;
}

.grid-corner.bl {
    bottom: 10px;
    left: 10px;
    border-right: none;
    border-top: none;
}

.grid-corner.br {
    bottom: 10px;
    right: 10px;
    border-left: none;
    border-top: none;
}

/* Crop Actions Below Preview */
.crop-actions-below {
    background: linear-gradient(135deg, var(--primary-light), #e0f2fe);
    border: 2px solid var(--primary);
    border-radius: var(--radius-sm);
    padding: 0.75rem;
    animation: slideUp 0.3s ease;
}

.crop-info-text {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.85rem;
    color: var(--primary-dark);
    font-weight: 600;
    margin-bottom: 0.5rem;
    justify-content: center;
}

.crop-actions-buttons {
    display: flex;
    gap: 0.5rem;
}

.crop-actions-buttons .btn {
    flex: 1;
    padding: 0.7rem;
    font-size: 0.9rem;
}

/* Scanner Controls */
.scanner-controls {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}

.scanner-upload-buttons {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 0.5rem;
}

.upload-btn {
    padding: 0.85rem 0.5rem;
    font-size: 0.9rem;
    flex-direction: column;
    gap: 0.3rem;
}

.upload-btn span:first-child {
    font-size: 1.3rem;
}

.scanner-tools {
    display: flex;
    gap: 0.5rem;
}
.tool-btn { flex: 1; font-size: 0.85rem; }
.tool-btn.active {
    background: var(--primary);
    color: var(--white);
    border-color: var(--primary);
}

/* Filters */
.filters-panel {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
    padding: 0.75rem;
    background: var(--slate-50);
    border-radius: var(--radius-sm);
    border: 1px solid var(--slate-200);
}
.slider-group { display: flex; flex-direction: column; gap: 0.3rem; }
.slider-group label {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 0;
}
.slider-value {
    background: var(--primary-light);
    color: var(--primary-dark);
    padding: 0.15rem 0.4rem;
    border-radius: 4px;
    font-size: 0.8rem;
    font-weight: 600;
}
.styled-range {
    width: 100%;
    height: 6px;
    -webkit-appearance: none;
    appearance: none;
    background: var(--slate-200);
    border-radius: 3px;
    outline: none;
    cursor: pointer;
}
.styled-range::-webkit-slider-thumb {
    -webkit-appearance: none;
    width: 20px; height: 20px;
    background: var(--primary);
    border-radius: 50%;
    cursor: pointer;
    border: 3px solid var(--white);
    box-shadow: var(--shadow-sm);
}
.scanner-actions { display: flex; gap: 0.5rem; }
.scanner-actions .btn { flex: 1; }

/* Profile */
.profile-grid { display: grid; grid-template-columns: 1fr; gap: 0.75rem; margin-bottom: 1rem; }
.input-group { display: flex; flex-direction: column; }
.input-with-copy { display: flex; gap: 0.4rem; }
.input-with-copy .styled-input { flex: 1; }
.btn-copy {
    background: transparent;
    border: 1.5px solid var(--slate-300);
    border-radius: var(--radius-sm);
    padding: 0.4rem 0.6rem;
    cursor: pointer;
    font-size: 1rem;
}
.btn-copy:hover { background: var(--primary-light); border-color: var(--primary); }
.profile-actions { display: flex; gap: 0.5rem; flex-wrap: wrap; justify-content: center; }
.profile-actions .btn { flex: 1; min-width: 100px; }

/* Custom Fields */
.custom-field-group {
    padding: 0.75rem;
    background: var(--slate-50);
    border-radius: var(--radius-sm);
    border: 1px solid var(--slate-200);
    margin-bottom: 0.75rem;
}
.custom-field-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 0.5rem;
    margin-bottom: 0.5rem;
}
.custom-field-label-input {
    flex: 1;
    padding: 0.4rem;
    border: 1px solid var(--slate-300);
    border-radius: 4px;
    font-size: 0.85rem;
    font-family: inherit;
}
.btn-remove-field {
    background: var(--danger);
    color: var(--white);
    border: none;
    border-radius: 4px;
    padding: 0.3rem 0.6rem;
    cursor: pointer;
}

/* Toast */
.toast-container {
    position: fixed;
    bottom: 90px;
    left: 50%;
    transform: translateX(-50%);
    z-index: 9999;
    display: flex;
    flex-direction: column;
    gap: 0.4rem;
    pointer-events: none;
    max-width: 90%;
}
.toast {
    background: var(--slate-900);
    color: var(--white);
    padding: 0.75rem 1.25rem;
    border-radius: var(--radius-sm);
    box-shadow: var(--shadow-lg);
    font-size: 0.85rem;
    font-weight: 500;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    animation: slideUp 0.3s ease forwards;
    pointer-events: auto;
}
.toast.success { border-right: 4px solid var(--success); }
.toast.error { border-right: 4px solid var(--danger); }
.toast.info { border-right: 4px solid var(--primary); }
.toast.warning { border-right: 4px solid var(--warning); }
@keyframes slideUp {
    from { opacity: 0; transform: translateY(20px); }
    to { opacity: 1; transform: translateY(0); }
}
@keyframes slideDown {
    from { opacity: 1; transform: translateY(0); }
    to { opacity: 0; transform: translateY(20px); }
}

/* Footer */
.app-footer {
    background: var(--slate-900);
    color: var(--slate-300);
    padding: 1rem 0;
    margin-top: auto;
}
.footer-bottom { text-align: center; }
.copyright { color: var(--slate-500); font-size: 0.75rem; }

/* =========================================
   Responsive
   ========================================= */
@media (min-width: 768px) {
    .container { padding: 0 1.5rem; }
    .card { padding: 1.5rem; }
    .profile-grid { grid-template-columns: repeat(2, 1fr); }
    .scanner-layout { flex-direction: row; }
    .scanner-preview-wrapper { flex: 1.5; }
    .scanner-preview { min-height: 400px; }
    .scanner-controls { flex: 1; }
    .bottom-nav { display: none; }
    .main-tabs-container { padding-bottom: 2rem; }
    .desktop-tabs { display: flex; gap: 0.5rem; }
    .pdf-options { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 767px) {
    .desktop-tabs { display: none; }
    .pdf-options { grid-template-columns: 1fr; }
    .toast-container { bottom: 100px; }
    .multi-image-upload-buttons {
        grid-template-columns: 1fr;
    }
    .images-grid {
        grid-template-columns: repeat(auto-fill, minmax(100px, 1fr));
        max-height: 300px;
    }
}