backend/static/css/styles.css

/* ═══════════════════════════════════════════════════════════
   Screenshot Studio — Premium Design System v2.0
   ═══════════════════════════════════════════════════════════ */

@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700&display=swap');

/* ── Design Tokens ── */
:root {
    --primary: #10B981;
    --primary-dark: #059669;
    --primary-light: #D1FAE5;
    --primary-glow: rgba(16, 185, 129, 0.12);
    --accent: #6366F1;
    --accent-light: #EEF2FF;

    --bg-body: #F0F2F5;
    --bg-surface: #FFFFFF;
    --bg-surface-elevated: #FFFFFF;
    --bg-muted: #F8FAFC;
    --bg-sidebar: #FAFBFC;

    --text-primary: #111827;
    --text-secondary: #6B7280;
    --text-tertiary: #9CA3AF;

    --border: #E5E7EB;
    --border-light: #F3F4F6;
    --divider: #F1F1F4;

    --danger: #DC2626;
    --danger-light: #FEE2E2;
    --danger-border: #FECACA;
    --warning: #F59E0B;

    --shadow-xs: 0 1px 2px rgba(0, 0, 0, 0.04);
    --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.06), 0 1px 2px rgba(0, 0, 0, 0.04);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.07), 0 2px 4px rgba(0, 0, 0, 0.04);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.08), 0 4px 6px rgba(0, 0, 0, 0.04);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.08), 0 10px 10px rgba(0, 0, 0, 0.04);

    --radius-sm: 6px;
    --radius-md: 10px;
    --radius-lg: 14px;
    --radius-xl: 20px;

    --sidebar-width: 260px;
    --transition-fast: 0.15s ease;
    --transition-normal: 0.25s ease;
    --transition-smooth: 0.35s cubic-bezier(0.4, 0, 0.2, 1);
}


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

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    background: var(--bg-body);
    color: var(--text-primary);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}


/* ══════════════════════════════════════════════════════════
   LAYOUT
   ══════════════════════════════════════════════════════════ */

.app-container {
    display: flex;
    min-height: 100vh;
}


/* ── Sidebar ── */
.sidebar {
    width: var(--sidebar-width);
    background: var(--bg-sidebar);
    border-right: 1px solid var(--border-light);
    display: flex;
    flex-direction: column;
    position: fixed;
    height: 100vh;
    z-index: 100;
    transition: transform var(--transition-smooth);
    overflow: hidden;
}

.logo {
    padding: 24px 20px 20px;
    border-bottom: 1px solid var(--divider);
    flex-shrink: 0;
}

.logo h1 {
    font-size: 17px;
    font-weight: 600;
    color: var(--text-primary);
    display: flex;
    align-items: center;
    gap: 10px;
    letter-spacing: -0.01em;
}

.logo-icon {
    width: 32px;
    height: 32px;
    background: linear-gradient(135deg, var(--primary), var(--primary-dark));
    border-radius: var(--radius-sm);
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-weight: 700;
    font-size: 15px;
    box-shadow: 0 2px 8px rgba(16, 185, 129, 0.3);
}

.nav-menu {
    flex: 1;
    padding: 12px 10px;
    overflow-y: auto;
    min-height: 0;
}

.nav-item {
    padding: 10px 14px;
    display: flex;
    align-items: center;
    gap: 12px;
    cursor: pointer;
    transition: all var(--transition-fast);
    color: var(--text-secondary);
    font-size: 13.5px;
    font-weight: 500;
    border-radius: var(--radius-md);
    margin-bottom: 2px;
}

.nav-item:hover {
    background: var(--bg-muted);
    color: var(--text-primary);
}

.nav-item.active {
    background: var(--primary-glow);
    color: var(--primary-dark);
}

.nav-icon {
    width: 20px;
    height: 20px;
    stroke-width: 2;
    flex-shrink: 0;
}


/* ── Mobile Hamburger ── */
.mobile-header {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    height: 56px;
    background: var(--bg-surface);
    border-bottom: 1px solid var(--border);
    z-index: 200;
    align-items: center;
    padding: 0 16px;
    gap: 12px;
    box-shadow: var(--shadow-xs);
}

.hamburger-btn {
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: none;
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    cursor: pointer;
    color: var(--text-primary);
    transition: all var(--transition-fast);
}

.hamburger-btn:hover {
    background: var(--bg-muted);
}

.hamburger-btn svg {
    width: 20px;
    height: 20px;
}

.mobile-header .logo h1 {
    font-size: 15px;
}

.mobile-header .logo {
    padding: 0;
    border: none;
}

.sidebar-overlay {
    display: none;
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.4);
    backdrop-filter: blur(2px);
    z-index: 99;
}

.sidebar-overlay.active {
    display: block;
}


/* ── Main Content ── */
.main-content {
    flex: 1;
    margin-left: var(--sidebar-width);
    padding: 36px 48px;
    max-width: 1100px;
}

.header {
    margin-bottom: 28px;
}

.header h2 {
    font-size: 26px;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 6px;
    letter-spacing: -0.02em;
}

.header p {
    color: var(--text-secondary);
    font-size: 14px;
    font-weight: 400;
}


/* ══════════════════════════════════════════════════════════
   TOOL SECTIONS
   ══════════════════════════════════════════════════════════ */

.tool-section {
    display: none;
    animation: fadeIn var(--transition-smooth);
}

.tool-section.active {
    display: block;
}

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

    to {
        opacity: 1;
        transform: translateY(0);
    }
}


/* ══════════════════════════════════════════════════════════
   CARDS
   ══════════════════════════════════════════════════════════ */

.card {
    background: var(--bg-surface);
    border-radius: var(--radius-lg);
    border: 1px solid var(--border);
    padding: 28px;
    margin-bottom: 20px;
    box-shadow: var(--shadow-xs);
    transition: box-shadow var(--transition-normal);
}

.card:hover {
    box-shadow: var(--shadow-sm);
}


/* ══════════════════════════════════════════════════════════
   FORMS
   ══════════════════════════════════════════════════════════ */

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

.form-label {
    display: block;
    font-size: 13px;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 6px;
    letter-spacing: 0.01em;
}

.form-input,
.form-textarea {
    width: 100%;
    padding: 10px 14px;
    border: 1.5px solid var(--border);
    border-radius: var(--radius-md);
    font-size: 14px;
    font-family: inherit;
    transition: all var(--transition-fast);
    background: var(--bg-surface);
    color: var(--text-primary);
}

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

.form-input::placeholder,
.form-textarea::placeholder {
    color: var(--text-tertiary);
}

.form-textarea {
    min-height: 180px;
    resize: vertical;
    line-height: 1.7;
}

.form-row {
    display: flex;
    gap: 14px;
    margin-bottom: 14px;
}

.form-hint {
    font-size: 12px;
    color: var(--text-tertiary);
    margin-top: 4px;
}

.form-range {
    width: 100%;
    height: 6px;
    -webkit-appearance: none;
    appearance: none;
    background: var(--border-light);
    border-radius: 3px;
    outline: none;
    margin-top: 8px;
}

.form-range::-webkit-slider-thumb {
    -webkit-appearance: none;
    width: 18px;
    height: 18px;
    border-radius: 50%;
    background: var(--primary);
    cursor: pointer;
    box-shadow: 0 1px 4px rgba(16, 185, 129, 0.3);
    transition: transform var(--transition-fast);
}

.form-range::-webkit-slider-thumb:hover {
    transform: scale(1.15);
}

.form-range::-moz-range-thumb {
    width: 18px;
    height: 18px;
    border-radius: 50%;
    background: var(--primary);
    cursor: pointer;
    border: none;
    box-shadow: 0 1px 4px rgba(16, 185, 129, 0.3);
}


/* ══════════════════════════════════════════════════════════
   SETTINGS
   ══════════════════════════════════════════════════════════ */

.settings-section {
    background: var(--bg-muted);
    padding: 18px;
    border-radius: var(--radius-md);
    margin-bottom: 18px;
    border: 1px solid var(--border-light);
}

.settings-section h3 {
    font-size: 14px;
    font-weight: 600;
    margin-bottom: 14px;
    color: var(--text-primary);
}

.settings-group {
    background: var(--bg-surface);
    border: 1px solid var(--border-light);
    border-radius: var(--radius-md);
    padding: 18px;
    margin-bottom: 16px;
}

.settings-group h4 {
    font-size: 14px;
    font-weight: 600;
    margin-bottom: 14px;
    color: var(--text-primary);
}

.advanced-toggle {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 10px 14px;
    background: var(--bg-muted);
    border-radius: var(--radius-md);
    cursor: pointer;
    font-size: 13px;
    font-weight: 600;
    color: var(--text-secondary);
    transition: all var(--transition-fast);
    margin-bottom: 14px;
    border: 1px solid var(--border-light);
    user-select: none;
}

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

.advanced-toggle:active {
    transform: scale(0.98);
}

.advanced-toggle svg {
    transition: transform 0.2s ease;
}

.advanced-settings {
    background: var(--bg-muted);
    padding: 18px;
    border-radius: var(--radius-md);
    margin-top: -6px;
    border: 1px solid var(--border-light);
}

.advanced-settings.open {
    display: block !important;
}


/* ══════════════════════════════════════════════════════════
   BUTTONS
   ══════════════════════════════════════════════════════════ */

.btn {
    padding: 10px 20px;
    border: none;
    border-radius: var(--radius-md);
    font-size: 13.5px;
    font-weight: 600;
    cursor: pointer;
    transition: all var(--transition-fast);
    display: inline-flex;
    align-items: center;
    gap: 8px;
    font-family: inherit;
    letter-spacing: 0.01em;
    position: relative;
    overflow: hidden;
}

.btn-primary {
    background: linear-gradient(135deg, var(--primary), var(--primary-dark));
    color: white;
    box-shadow: 0 2px 8px rgba(16, 185, 129, 0.25);
}

.btn-primary:hover {
    box-shadow: 0 4px 14px rgba(16, 185, 129, 0.35);
    transform: translateY(-1px);
}

.btn-primary:active {
    transform: translateY(0);
    box-shadow: 0 1px 4px rgba(16, 185, 129, 0.2);
}

.btn-primary:disabled {
    background: var(--border);
    box-shadow: none;
    cursor: not-allowed;
    transform: none;
}

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

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

.btn-danger {
    background: var(--danger-light);
    color: var(--danger);
    border: 1px solid var(--danger-border);
}

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

.btn-ghost-danger {
    background: transparent;
    color: var(--text-tertiary);
    border: 1px solid var(--border);
    padding: 7px 10px;
}

.btn-ghost-danger:hover {
    background: #FEF2F2;
    color: var(--danger);
    border-color: var(--danger-border);
}

.btn--disabled {
    opacity: 0.5;
    cursor: not-allowed !important;
    pointer-events: none;
}

.btn--loading {
    opacity: 0.7;
    cursor: wait !important;
    pointer-events: none;
}

.btn--loading::after {
    content: '';
    display: inline-block;
    width: 14px;
    height: 14px;
    border: 2px solid rgba(255, 255, 255, 0.3);
    border-top-color: #fff;
    border-radius: 50%;
    animation: spin 0.6s linear infinite;
    margin-left: 6px;
}

.btn-secondary.btn--loading::after {
    border-color: rgba(0, 0, 0, 0.1);
    border-top-color: var(--text-primary);
}

.btn-icon {
    background: none;
    border: none;
    padding: 6px;
    cursor: pointer;
    color: var(--text-secondary);
    transition: all var(--transition-fast);
    display: inline-flex;
    align-items: center;
    justify-content: center;
    border-radius: var(--radius-sm);
}

.btn-icon:hover {
    background: var(--primary-glow);
    color: var(--primary);
}

.button-group {
    display: flex;
    gap: 12px;
    margin-top: 20px;
}

.button-group .btn {
    flex: 1;
}


/* ══════════════════════════════════════════════════════════
   UTILITY CLASSES (replacing inline styles)
   ══════════════════════════════════════════════════════════ */

.flex {
    display: flex;
}

.flex-1 {
    flex: 1;
}

.flex-2 {
    flex: 2;
}

.flex-col {
    flex-direction: column;
}

.flex-wrap {
    flex-wrap: wrap;
}

.items-center {
    align-items: center;
}

.justify-between {
    justify-content: space-between;
}

.gap-8 {
    gap: 8px;
}

.gap-10 {
    gap: 10px;
}

.gap-12 {
    gap: 12px;
}

.mt-4 {
    margin-top: 4px;
}

.mt-10 {
    margin-top: 10px;
}

.mt-14 {
    margin-top: 14px;
}

.mt-20 {
    margin-top: 20px;
}

.mb-0 {
    margin-bottom: 0;
}

.mb-18 {
    margin-bottom: 18px;
}

.text-center {
    text-align: center;
}

.text-right {
    text-align: right;
}

.hidden {
    display: none;
}

.w-full {
    width: 100%;
}

.font-mono {
    font-family: 'Menlo', 'Consolas', monospace;
    font-size: 13px;
}

/* ── Extended Utilities (v2.1) ── */

.gap-16 {
    gap: 16px;
}

.mt-8 {
    margin-top: 8px;
}

.mt-16 {
    margin-top: 16px;
}

.mt-24 {
    margin-top: 24px;
}

.mb-12 {
    margin-bottom: 12px;
}

.mb-16 {
    margin-bottom: 16px;
}

.mb-20 {
    margin-bottom: 20px;
}

.mb-24 {
    margin-bottom: 24px;
}

.text-sm {
    font-size: 13px;
}

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

.text-tertiary {
    color: var(--text-tertiary);
}

.text-danger {
    color: #e53e3e;
}

.fw-500 {
    font-weight: 500;
}

/* ── Component Utilities ── */

.file-preview-card {
    padding: 24px;
    background: var(--bg-muted);
    border-radius: var(--radius-md);
    display: inline-block;
    text-align: center;
}

.file-preview-card svg {
    margin-bottom: 8px;
}

.preview-image {
    max-width: 100%;
    max-height: 400px;
    border-radius: var(--radius-md);
}

.resource-group {
    margin-bottom: 32px;
    width: 100%;
}

.resource-group-header {
    margin-bottom: 16px;
    padding-bottom: 8px;
    border-bottom: 1px solid var(--border);
    color: var(--text-primary);
    font-size: 16px;
    font-weight: 600;
}

.modal-dialog {
    width: 90%;
    max-width: 600px;
    background: var(--bg-surface);
    border-radius: var(--radius-lg);
    padding: 32px;
}

/* ── Spinner ── */

@keyframes spin {
    to {
        transform: rotate(360deg);
    }
}

.spin {
    animation: spin 1s linear infinite;
}

.btn[disabled] {
    opacity: 0.6;
    cursor: not-allowed;
    pointer-events: none;
}


/* ══════════════════════════════════════════════════════════
   FILE UPLOAD
   ══════════════════════════════════════════════════════════ */

.file-upload {
    border: 2px dashed var(--border);
    border-radius: var(--radius-md);
    padding: 28px;
    text-align: center;
    cursor: pointer;
    transition: all var(--transition-fast);
}

.file-upload:hover {
    border-color: var(--primary);
    background: var(--primary-glow);
}

.file-upload input {
    display: none;
}

.file-upload-icon {
    margin: 0 auto 10px;
    opacity: 0.4;
    display: block;
}

.file-upload-text {
    color: var(--text-secondary);
    font-size: 13px;
}

.file-upload-hint {
    color: var(--text-tertiary);
    font-size: 12px;
    margin-top: 3px;
}

.file-name {
    margin-top: 10px;
    font-size: 12px;
    color: var(--text-secondary);
}


/* ══════════════════════════════════════════════════════════
   TABS
   ══════════════════════════════════════════════════════════ */

.tabs {
    display: flex;
    gap: 0;
    margin-bottom: 20px;
    border-bottom: 1.5px solid var(--border-light);
}

.tab {
    padding: 10px 18px;
    background: none;
    border: none;
    border-bottom: 2px solid transparent;
    color: var(--text-secondary);
    font-size: 13.5px;
    font-weight: 500;
    cursor: pointer;
    transition: all var(--transition-fast);
    font-family: inherit;
}

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

.tab.active {
    color: var(--primary-dark);
    border-bottom-color: var(--primary);
    font-weight: 600;
}


/* ══════════════════════════════════════════════════════════
   LOADING & PROGRESS
   ══════════════════════════════════════════════════════════ */

.loading {
    display: none;
    text-align: center;
    padding: 32px;
}

.loading.active {
    display: block;
}

.loading-text {
    color: var(--text-secondary);
    margin-top: 10px;
    font-size: 14px;
}

.spinner {
    width: 40px;
    height: 40px;
    border: 3px solid var(--primary-light);
    border-top-color: var(--primary);
    border-radius: 50%;
    animation: spin 0.7s linear infinite;
    margin: 0 auto 14px;
}

@keyframes spin {
    to {
        transform: rotate(360deg);
    }
}

/* Progress Bar (inline in cards) */
.progress-container {
    width: 100%;
    max-width: 380px;
    margin: 0 auto;
}

.progress-bar {
    width: 100%;
    height: 6px;
    background: var(--border-light);
    border-radius: 3px;
    overflow: hidden;
}

.progress-fill {
    height: 100%;
    background: linear-gradient(90deg, var(--primary), var(--accent));
    border-radius: 3px;
    transition: width 0.3s ease;
    width: 0%;
}

.progress-text {
    font-size: 12px;
    color: var(--text-tertiary);
    margin-top: 6px;
}

.eta-text {
    font-size: 11px;
    color: var(--text-tertiary);
    margin-top: 3px;
}

/* Progress bar container (Image-to-Screenshots step progress) */
.progress-bar-container {
    width: 100%;
    height: 8px;
    background: var(--border-light);
    border-radius: 4px;
    overflow: hidden;
    margin-bottom: 10px;
}

.progress-bar-container .progress-bar {
    height: 100%;
    background: linear-gradient(90deg, var(--primary), var(--accent));
    border-radius: 4px;
    transition: width 0.4s ease;
    width: 0%;
}

.progress-info {
    display: flex;
    justify-content: space-between;
    font-size: 13px;
    color: var(--text-secondary);
}

.progress-info span:first-child {
    font-weight: 600;
    color: var(--primary-dark);
}


/* ══════════════════════════════════════════════════════════
   STEP INDICATORS (Image-to-Screenshots)
   ══════════════════════════════════════════════════════════ */

.step-indicators {
    display: flex;
    justify-content: space-between;
    margin-bottom: 24px;
    position: relative;
}

.step-indicators::before {
    content: '';
    position: absolute;
    top: 18px;
    left: 36px;
    right: 36px;
    height: 2px;
    background: var(--border-light);
    z-index: 0;
}

.step-indicator {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 8px;
    z-index: 1;
    flex: 1;
}

.step-icon {
    width: 36px;
    height: 36px;
    border-radius: 50%;
    background: var(--bg-muted);
    border: 2px solid var(--border);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 13px;
    font-weight: 700;
    color: var(--text-tertiary);
    transition: all var(--transition-normal);
}

.step-label {
    font-size: 11px;
    font-weight: 500;
    color: var(--text-tertiary);
    text-align: center;
    transition: color var(--transition-normal);
}

/* Active step */
.step-indicator.active .step-icon {
    background: var(--primary-glow);
    border-color: var(--primary);
    color: var(--primary-dark);
    box-shadow: 0 0 0 4px var(--primary-glow);
    animation: stepPulse 1.5s ease-in-out infinite;
}

.step-indicator.active .step-label {
    color: var(--primary-dark);
    font-weight: 600;
}

/* Completed step */
.step-indicator.completed .step-icon {
    background: var(--primary);
    border-color: var(--primary);
    color: white;
    font-size: 0;
    box-shadow: 0 2px 6px rgba(16, 185, 129, 0.3);
}

.step-indicator.completed .step-icon::after {
    content: '✓';
    font-size: 16px;
}

.step-indicator.completed .step-label {
    color: var(--primary-dark);
}

/* Error step */
.step-indicator.error .step-icon {
    background: var(--danger-light);
    border-color: var(--danger);
    color: var(--danger);
    box-shadow: 0 0 0 4px rgba(220, 38, 38, 0.1);
}

.step-indicator.error .step-label {
    color: var(--danger);
}

@keyframes stepPulse {

    0%,
    100% {
        box-shadow: 0 0 0 4px var(--primary-glow);
    }

    50% {
        box-shadow: 0 0 0 8px rgba(16, 185, 129, 0.06);
    }
}


/* ══════════════════════════════════════════════════════════
   RESULTS & ALERTS
   ══════════════════════════════════════════════════════════ */

.result-section {
    display: none;
    margin-top: 20px;
    animation: fadeIn var(--transition-smooth);
}

.result-section.active {
    display: block;
}

.alert {
    padding: 14px 18px;
    border-radius: var(--radius-md);
    margin-bottom: 20px;
    display: flex;
    align-items: flex-start;
    gap: 10px;
    font-size: 14px;
}

.alert-success {
    background: var(--primary-light);
    color: var(--primary-dark);
    border: 1px solid rgba(16, 185, 129, 0.2);
}

.alert-error {
    background: #FEF2F2;
    color: var(--danger);
    border: 1px solid var(--danger-border);
}


/* ══════════════════════════════════════════════════════════
   SCREENSHOT GRID & CARDS
   ══════════════════════════════════════════════════════════ */

.screenshot-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
    gap: 16px;
    margin-top: 20px;
}

.screenshot-card {
    background: var(--bg-surface);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    overflow: hidden;
    transition: all var(--transition-normal);
    cursor: pointer;
    position: relative;
}

.screenshot-card:hover {
    box-shadow: var(--shadow-md);
    transform: translateY(-3px);
}

.screenshot-card img {
    width: 100%;
    height: auto;
    display: block;
    cursor: pointer;
}

.screenshot-info {
    padding: 10px 14px;
    font-size: 12px;
    color: var(--text-secondary);
    border-top: 1px solid var(--border-light);
}

.screenshot-card:hover .screenshot-info {
    background: var(--bg-muted);
}


/* ══════════════════════════════════════════════════════════
   IMAGE MODAL
   ══════════════════════════════════════════════════════════ */

.image-modal {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.92);
    backdrop-filter: blur(8px);
    z-index: 9999;
    align-items: center;
    justify-content: center;
}

.image-modal.active {
    display: flex;
}

.image-modal-content {
    position: relative;
    max-width: 90%;
    max-height: 90%;
    display: flex;
    align-items: center;
    justify-content: center;
}

.image-modal img {
    max-width: 100%;
    max-height: 90vh;
    object-fit: contain;
    border-radius: var(--radius-md);
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.5);
}

.modal-close {
    position: absolute;
    top: 16px;
    right: 16px;
    background: rgba(255, 255, 255, 0.95);
    border: none;
    width: 36px;
    height: 36px;
    border-radius: 50%;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 20px;
    color: #333;
    transition: all var(--transition-fast);
    z-index: 10001;
    box-shadow: var(--shadow-sm);
}

.modal-close:hover {
    background: white;
    transform: scale(1.1);
}

.modal-nav {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    background: rgba(255, 255, 255, 0.9);
    border: none;
    width: 44px;
    height: 44px;
    border-radius: 50%;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 20px;
    color: #333;
    transition: all var(--transition-fast);
    z-index: 10001;
    box-shadow: var(--shadow-sm);
}

.modal-nav:hover {
    background: white;
    transform: translateY(-50%) scale(1.1);
}

.modal-nav:disabled {
    opacity: 0.3;
    cursor: not-allowed;
}

.modal-nav:disabled:hover {
    transform: translateY(-50%) scale(1);
}

.modal-nav-prev {
    left: 16px;
}

.modal-nav-next {
    right: 16px;
}

.modal-info {
    position: absolute;
    bottom: 16px;
    left: 50%;
    transform: translateX(-50%);
    background: rgba(255, 255, 255, 0.95);
    padding: 6px 14px;
    border-radius: 20px;
    font-size: 13px;
    color: #333;
    font-weight: 500;
    box-shadow: var(--shadow-sm);
}

.modal-download {
    position: absolute;
    top: 16px;
    left: 16px;
    background: var(--primary);
    color: white;
    border: none;
    padding: 8px 14px;
    border-radius: var(--radius-md);
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: 6px;
    font-size: 13px;
    font-weight: 600;
    transition: all var(--transition-fast);
    z-index: 10001;
    box-shadow: var(--shadow-sm);
    font-family: inherit;
}

.modal-download:hover {
    background: var(--primary-dark);
    transform: scale(1.03);
}


/* ══════════════════════════════════════════════════════════
   NOTIFICATIONS
   ══════════════════════════════════════════════════════════ */

.notification-toast {
    position: fixed;
    bottom: 20px;
    right: 20px;
    background: var(--bg-surface);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: 14px 18px;
    box-shadow: var(--shadow-lg);
    display: flex;
    align-items: center;
    gap: 10px;
    min-width: 280px;
    max-width: 380px;
    z-index: 10000;
    animation: slideIn 0.3s ease;
}

@keyframes slideIn {
    from {
        transform: translateX(400px);
        opacity: 0;
    }

    to {
        transform: translateX(0);
        opacity: 1;
    }
}

.notification-toast.success {
    border-left: 3px solid var(--primary);
}

.notification-toast.error {
    border-left: 3px solid var(--danger);
}

.notification-toast.info {
    border-left: 3px solid var(--accent);
}

.notification-icon {
    width: 22px;
    height: 22px;
    flex-shrink: 0;
}

.notification-content {
    flex: 1;
}

.notification-title {
    font-weight: 600;
    font-size: 13.5px;
    margin-bottom: 2px;
}

.notification-message {
    font-size: 12.5px;
    color: var(--text-secondary);
}

.notification-close {
    background: none;
    border: none;
    cursor: pointer;
    color: var(--text-tertiary);
    font-size: 18px;
    padding: 0;
    width: 24px;
    height: 24px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: var(--radius-sm);
    transition: all var(--transition-fast);
}

.notification-close:hover {
    background: var(--bg-muted);
    color: var(--text-primary);
}


/* ══════════════════════════════════════════════════════════
   METRICS
   ══════════════════════════════════════════════════════════ */

.metrics-display {
    background: var(--bg-muted);
    border-radius: var(--radius-md);
    padding: 10px 14px;
    margin-top: 10px;
    font-size: 12.5px;
    color: var(--text-secondary);
    display: flex;
    gap: 16px;
    flex-wrap: wrap;
    border: 1px solid var(--border-light);
}

.metric-item {
    display: flex;
    align-items: center;
    gap: 5px;
}

.metric-label {
    font-weight: 600;
    color: var(--text-primary);
}

.metric-value {
    color: var(--primary-dark);
}


/* ══════════════════════════════════════════════════════════
   RESOURCES
   ══════════════════════════════════════════════════════════ */

.resources-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
    gap: 16px;
}

.resource-card {
    background: var(--bg-surface);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    overflow: hidden;
    transition: all var(--transition-normal);
}

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

.resource-card img {
    width: 100%;
    height: 180px;
    object-fit: cover;
    display: block;
    cursor: pointer;
}

.resource-card-info {
    padding: 12px 14px;
}

.resource-card-name {
    font-size: 12.5px;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 8px;
    word-break: break-all;
}

.resource-card-actions {
    display: flex;
    gap: 8px;
    margin-top: 10px;
}

.resource-card-actions .btn {
    flex: 1;
    padding: 7px 10px;
    font-size: 12.5px;
    justify-content: center;
}

.resources-list {
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.resource-list-item {
    background: var(--bg-surface);
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    padding: 12px 16px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    transition: all var(--transition-fast);
}

.resource-list-item:hover {
    background: var(--bg-muted);
    box-shadow: var(--shadow-xs);
}

.resource-btn-group {
    display: flex;
    gap: 6px;
}

/* Resource Checkbox */
.resource-checkbox,
.resource-list-checkbox {
    position: absolute;
    top: 10px;
    left: 10px;
    width: 18px;
    height: 18px;
    cursor: pointer;
    accent-color: var(--primary);
    z-index: 2;
}

.resource-card.selected {
    border-color: var(--primary);
    box-shadow: 0 0 0 2px var(--primary-glow);
}

.resource-list-checkbox {
    position: relative;
    top: auto;
    left: auto;
    flex-shrink: 0;
}

.resource-list-icon {
    color: var(--text-tertiary);
    flex-shrink: 0;
}

.resource-list-info {
    flex: 1;
    min-width: 0;
}

.resource-list-name {
    font-size: 13px;
    font-weight: 600;
    color: var(--text-primary);
    word-break: break-all;
}

.resource-list-meta {
    font-size: 12px;
    color: var(--text-tertiary);
    margin-top: 2px;
}

.resource-list-actions {
    display: flex;
    gap: 6px;
    flex-shrink: 0;
}

.resource-list-actions .btn {
    padding: 6px 10px;
    font-size: 12px;
}

.resource-list-item.selected {
    border-color: var(--primary);
    background: var(--primary-glow);
}


/* ══════════════════════════════════════════════════════════
   TOKEN COUNTER
   ══════════════════════════════════════════════════════════ */

.token-counter {
    font-size: 11.5px;
    color: var(--text-tertiary);
    margin-top: 6px;
    padding: 0 2px;
    text-align: right;
    font-variant-numeric: tabular-nums;
    transition: color var(--transition-fast);
    font-weight: 500;
}

.token-counter--warning {
    color: var(--warning);
}

.token-counter--danger {
    color: var(--danger);
}


/* ══════════════════════════════════════════════════════════
   CACHE BUTTON (sidebar bottom)
   ══════════════════════════════════════════════════════════ */

.cache-button-container {
    flex-shrink: 0;
    padding: 16px;
    border-top: 1px solid var(--divider);
    background: var(--bg-sidebar);
}

.cache-clear-btn {
    width: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 10px 14px;
    font-size: 13px;
    background: transparent;
    border: 1px solid var(--border);
    color: var(--text-secondary);
    border-radius: var(--radius-sm);
    cursor: pointer;
    transition: all var(--transition-fast);
    font-weight: 500;
}

.cache-clear-btn:hover {
    background: #FEF2F2;
    border-color: var(--danger-border);
    color: var(--danger);
}

.cache-clear-btn svg {
    opacity: 0.85;
}

.cache-stats {
    margin-top: 8px;
    font-size: 10px;
    color: var(--text-tertiary);
    text-align: center;
    font-weight: 400;
}


/* ══════════════════════════════════════════════════════════
   COMPARISON SLIDER
   ══════════════════════════════════════════════════════════ */

.image-comparison-slider {
    position: relative;
    overflow: hidden;
    cursor: col-resize;
    border: 2px solid var(--border);
    border-radius: var(--radius-md);
}

.image-comparison-slider img {
    display: block;
    width: 100%;
    height: auto;
    image-rendering: -webkit-optimize-contrast;
    image-rendering: crisp-edges;
}

.comparison-handle {
    position: absolute;
    top: 0;
    bottom: 0;
    width: 4px;
    background: var(--primary);
    cursor: col-resize;
    z-index: 5;
    transition: none;
}

.comparison-handle>div:last-child {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 36px;
    height: 36px;
    background: white;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: var(--shadow-md);
    border: 2px solid var(--primary);
}


/* ══════════════════════════════════════════════════════════
   PREVIEW MODAL
   ══════════════════════════════════════════════════════════ */

.preview-modal-body {
    width: 90%;
    max-width: 1200px;
    max-height: 90vh;
    overflow: auto;
    background: white;
    border-radius: var(--radius-lg);
    padding: 24px;
}

.preview-modal-title {
    margin-bottom: 14px;
    font-size: 18px;
    font-weight: 600;
}

.preview-modal-actions {
    display: flex;
    gap: 10px;
    margin-bottom: 14px;
}

.preview-frame-wrapper {
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    padding: 16px;
    background: var(--bg-muted);
    max-height: 60vh;
    overflow: auto;
}

.preview-frame {
    width: 100%;
    min-height: 400px;
    border: none;
    background: white;
    border-radius: var(--radius-sm);
}


/* ══════════════════════════════════════════════════════════
   IMAGE-TO-SCREENSHOTS SPECIFIC
   ══════════════════════════════════════════════════════════ */

.image-preview {
    margin-top: 10px;
    text-align: center;
}

.empty-state {
    text-align: center;
    padding: 48px;
    color: var(--text-tertiary);
}

.empty-state-icon {
    margin: 0 auto 14px;
    opacity: 0.3;
    display: block;
}

.empty-state-title {
    font-weight: 500;
}

.empty-state-hint {
    font-size: 13px;
    margin-top: 6px;
}

.quality-labels {
    display: flex;
    justify-content: space-between;
    font-size: 11px;
    color: var(--text-tertiary);
    margin-top: 4px;
    padding: 0 2px;
}

.error-card {
    background: #FEF2F2;
    border-color: var(--danger-border);
}


/* ══════════════════════════════════════════════════════════
   RESPONSIVE DESIGN
   ══════════════════════════════════════════════════════════ */

@media (max-width: 768px) {
    .mobile-header {
        display: flex;
    }

    .sidebar {
        transform: translateX(-100%);
        box-shadow: var(--shadow-xl);
    }

    .sidebar.open {
        transform: translateX(0);
    }

    .main-content {
        margin-left: 0;
        padding: 76px 16px 20px;
    }

    .form-row {
        flex-direction: column;
    }

    .screenshot-grid,
    .resources-grid {
        grid-template-columns: 1fr;
    }

    .step-indicators {
        gap: 4px;
    }

    .step-indicators::before {
        left: 20px;
        right: 20px;
    }

    .button-group {
        flex-direction: column;
    }
}

@media (max-width: 480px) {
    .header h2 {
        font-size: 22px;
    }

    .card {
        padding: 18px;
    }
}