/* ========== Keyframe Animations ========== */
@keyframes spin {
    to { transform: rotate(360deg); }
}

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

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

@keyframes slideInDown {
    from { opacity: 0; transform: translateY(-12px); }
    to   { opacity: 1; transform: translateY(0); }
}

@keyframes logoShimmer {
    0%, 100% { background-position: 0% 50%; }
    50%       { background-position: 100% 50%; }
}

@keyframes pulse {
    0%, 100% { opacity: 1; }
    50%       { opacity: 0.6; }
}

@keyframes scaleIn {
    from { opacity: 0; transform: scale(0.92); }
    to   { opacity: 1; transform: scale(1); }
}

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

:root {
    --bg: #f5f4ff;
    --surface: #ffffff;
    --text: #1a1730;
    --text-secondary: #6b7280;
    --border: #e2e0f0;
    --primary: #6366f1;
    --primary-hover: #4f46e5;
    --radius: 12px;
    --radius-sm: 8px;
    --shadow: 0 2px 8px rgba(99,102,241,0.08);
    --shadow-lg: 0 8px 30px rgba(99,102,241,0.15);
    --transition: 0.2s ease;

    /* PDF tool colors */
    --color-merge: #e5322d;
    --color-split: #f59e0b;
    --color-compress: #10b981;
    --color-rotate: #8b5cf6;
    --color-pdf-to-jpg: #3b82f6;
    --color-jpg-to-pdf: #ec4899;
    --color-watermark-text: #06b6d4;
    --color-watermark-image: #14b8a6;
    --color-page-numbers: #6366f1;
    --color-protect: #ef4444;
    --color-unlock: #22c55e;
    --color-crop: #f97316;
    --color-sign: #8b5cf6;

    /* CSV tool colors */
    --color-csv-merge: #2563eb;
    --color-csv-split: #7c3aed;
    --color-csv-convert: #0891b2;
    --color-csv-filter: #059669;
    --color-csv-sort: #d97706;
    --color-csv-dedup: #dc2626;
    --color-csv-columns: #4f46e5;
    --color-csv-stats: #0d9488;
    --color-csv-preview: #6366f1;
    --color-csv-validate: #e11d48;
    --color-csv-replace: #9333ea;
    --color-csv-transpose: #0284c7;

    /* Image tool colors */
    --color-img-compress: #059669;
    --color-img-resize: #7c3aed;
    --color-img-crop: #f97316;
    --color-img-rotate: #8b5cf6;
    --color-img-flip: #06b6d4;
    --color-img-convert: #2563eb;
    --color-img-watermark-text: #0891b2;
    --color-img-watermark-image: #14b8a6;
    --color-img-adjust: #d97706;
    --color-img-blur: #6366f1;
    --color-img-sharpen: #e11d48;
    --color-img-filter: #9333ea;
    --color-img-rembg: #ef4444;
    --color-img-passport: #0d9488;

    /* Document tool colors */
    --color-doc-docx-to-pdf: #e5322d;
    --color-doc-pdf-to-text: #3b82f6;
    --color-doc-md-to-html: #10b981;
    --color-doc-md-to-pdf: #059669;
    --color-doc-diff: #f59e0b;
    --color-doc-word-count: #8b5cf6;
    --color-doc-txt-to-pdf: #ec4899;
    --color-doc-merge-text: #2563eb;
    --color-doc-find-replace: #9333ea;
    --color-doc-encoding: #0891b2;
    --color-doc-line-endings: #6366f1;
    --color-doc-html-to-pdf: #dc2626;

    /* Nepali tool colors */
    --color-nepali-date: #dc2626;
    --color-nepali-unicode: #7c3aed;

    /* Category colors */
    --cat-pdf: #e5322d;
    --cat-csv: #2563eb;
    --cat-image: #7c3aed;
    --cat-doc: #059669;
    --cat-nepali: #dc2626;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    background: var(--bg);
    color: var(--text);
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    line-height: 1.6;
}

/* ========== Header ========== */
header {
    background: var(--surface);
    border-bottom: 1px solid var(--border);
    padding: 0 24px;
    height: 60px;
    display: flex;
    align-items: center;
    gap: 20px;
    position: sticky;
    top: 0;
    z-index: 100;
    animation: slideInDown 0.4s ease both;
}

/* Breadcrumb takes available space, pushing lang switcher right */
#breadcrumb { flex: 1; }

/* ===== Language Switcher ===== */
.lang-switcher {
    position: relative;
    margin-left: auto;
    flex-shrink: 0;
}
.lang-toggle {
    display: flex;
    align-items: center;
    gap: 5px;
    padding: 6px 10px;
    background: transparent;
    border: 1.5px solid var(--border);
    border-radius: 20px;
    cursor: pointer;
    font-size: 0.8rem;
    font-weight: 600;
    color: var(--text);
    transition: border-color 0.2s, background 0.2s;
    white-space: nowrap;
}
.lang-toggle:hover {
    border-color: var(--primary);
    background: rgba(99,102,241,0.06);
    color: var(--primary);
}
.lang-current-flag { font-size: 1rem; line-height: 1; }
.lang-current-code { font-size: 0.75rem; letter-spacing: 0.04em; }
.lang-chevron { opacity: 0.5; transition: transform 0.2s; }
.lang-toggle[aria-expanded="true"] .lang-chevron { transform: rotate(180deg); }

.lang-dropdown {
    position: absolute;
    top: calc(100% + 8px);
    right: 0;
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: 14px;
    box-shadow: 0 8px 32px rgba(0,0,0,0.12);
    padding: 6px;
    min-width: 200px;
    max-height: 340px;
    overflow-y: auto;
    z-index: 200;
    animation: fadeInUp 0.15s ease both;
}
[dir="rtl"] .lang-dropdown { right: auto; left: 0; }

.lang-option {
    display: flex;
    align-items: center;
    gap: 10px;
    width: 100%;
    padding: 8px 10px;
    background: transparent;
    border: none;
    border-radius: 8px;
    cursor: pointer;
    text-align: left;
    transition: background 0.15s;
    color: var(--text);
}
.lang-option:hover { background: rgba(99,102,241,0.08); }
.lang-option.active {
    background: rgba(99,102,241,0.1);
    color: var(--primary);
    font-weight: 600;
}
.lang-flag    { font-size: 1.1rem; flex-shrink: 0; }
.lang-native  { font-size: 0.85rem; font-weight: 600; flex: 1; }
.lang-english { font-size: 0.75rem; color: var(--text-muted); }

/* ===== RTL overrides ===== */
[dir="rtl"] .lang-option { text-align: right; flex-direction: row-reverse; }
[dir="rtl"] .category-card-header { flex-direction: row-reverse; }
[dir="rtl"] .tool-card { text-align: right; }
[dir="rtl"] .breadcrumb { flex-direction: row-reverse; }
[dir="rtl"] header { flex-direction: row-reverse; }
[dir="rtl"] .lang-switcher { margin-left: 0; margin-right: auto; }
[dir="rtl"] .ndc-toolbar,
[dir="rtl"] .nuc-toolbar { flex-direction: row-reverse; }
[dir="rtl"] .rembg-workspace { direction: rtl; }
[dir="rtl"] .options-form label { text-align: right; }
[dir="rtl"] .action-bar { flex-direction: row-reverse; }

.logo {
    font-size: 1.25rem;
    font-weight: 800;
    text-decoration: none;
    background: linear-gradient(135deg, #6366f1, #8b5cf6, #a855f7, #6366f1);
    background-size: 300% 300%;
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    animation: logoShimmer 4s ease infinite;
    letter-spacing: -0.02em;
}

.breadcrumb {
    display: flex;
    align-items: center;
    gap: 6px;
    font-size: 0.85rem;
}

.breadcrumb a {
    color: var(--text-secondary);
    text-decoration: none;
}

.breadcrumb a:hover { color: var(--primary); }

.breadcrumb .sep { color: var(--border); }

.breadcrumb span:not(.sep) {
    color: var(--text);
    font-weight: 500;
}

/* ========== Main ========== */
main {
    flex: 1;
    max-width: 1100px;
    width: 100%;
    margin: 0 auto;
    padding: 24px 16px;
}

.hidden { display: none !important; }

/* ========== Hero ========== */
.hero {
    text-align: center;
    padding: 48px 16px 32px;
    animation: fadeInUp 0.6s ease both;
}

.hero h1 {
    font-size: 2rem;
    font-weight: 700;
    margin-bottom: 12px;
    color: var(--text);
}

.hero p {
    font-size: 1.1rem;
    color: var(--text-secondary);
    max-width: 560px;
    margin: 0 auto;
}

/* ========== Category Grid (Landing) ========== */
.category-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 20px;
    padding-bottom: 48px;
}

.category-card {
    background: var(--surface);
    border: 2px solid var(--border);
    border-radius: 16px;
    padding: 32px 28px;
    cursor: pointer;
    transition: transform var(--transition), box-shadow var(--transition), border-color var(--transition);
    text-decoration: none;
    color: inherit;
    animation: fadeInUp 0.5s ease both;
}

.category-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
    border-color: var(--cat-color, var(--primary));
}

.category-card-header {
    display: flex;
    align-items: center;
    gap: 16px;
    margin-bottom: 12px;
}

.category-card-icon {
    width: 56px;
    height: 56px;
    border-radius: 14px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.4rem;
    font-weight: 700;
    color: white;
}

.category-card-name {
    font-size: 1.25rem;
    font-weight: 700;
}

.category-card-count {
    font-size: 0.85rem;
    color: var(--text-secondary);
}

.category-card-desc {
    color: var(--text-secondary);
    font-size: 0.9rem;
    line-height: 1.5;
}

/* Stagger category cards */
.category-card:nth-child(1) { animation-delay: 0.05s; }
.category-card:nth-child(2) { animation-delay: 0.1s; }
.category-card:nth-child(3) { animation-delay: 0.15s; }
.category-card:nth-child(4) { animation-delay: 0.2s; }
.category-card:nth-child(5) { animation-delay: 0.25s; }

/* ========== Dashboard ========== */
.dashboard-header {
    display: flex;
    align-items: center;
    gap: 20px;
    padding: 24px 0 28px;
    animation: slideInDown 0.4s ease both;
}

.dashboard-icon {
    width: 64px;
    height: 64px;
    border-radius: 16px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    font-weight: 700;
    color: white;
    flex-shrink: 0;
}

.dashboard-header h1 {
    font-size: 1.5rem;
    font-weight: 700;
}

.dashboard-header p {
    color: var(--text-secondary);
    font-size: 0.95rem;
}

/* ========== Tool Grid ========== */
.tool-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
    gap: 16px;
    padding-bottom: 48px;
}

.tool-card {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 24px 20px;
    text-align: center;
    cursor: pointer;
    transition: transform var(--transition), box-shadow var(--transition), border-color var(--transition);
    text-decoration: none;
    color: inherit;
    animation: fadeInUp 0.4s ease both;
}

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

.tool-card-icon {
    width: 56px;
    height: 56px;
    border-radius: 14px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 14px;
    font-size: 1.5rem;
    color: white;
    background: var(--tool-color, var(--primary));
}

.tool-card-name {
    font-weight: 600;
    font-size: 0.95rem;
    margin-bottom: 4px;
}

.tool-card-desc {
    font-size: 0.8rem;
    color: var(--text-secondary);
    line-height: 1.4;
}

/* ========== Tool View ========== */
.tool-header {
    text-align: center;
    padding: 32px 16px 24px;
    animation: fadeInUp 0.4s ease both;
}

.tool-icon-large {
    width: 64px;
    height: 64px;
    border-radius: 16px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 16px;
    font-size: 1.75rem;
    color: white;
}

.tool-header h2 {
    font-size: 1.5rem;
    font-weight: 700;
    margin-bottom: 8px;
}

.tool-header p {
    color: var(--text-secondary);
    max-width: 480px;
    margin: 0 auto;
}

.tool-workspace {
    max-width: 640px;
    margin: 0 auto;
}

/* ========== Upload Zone ========== */
.upload-zone {
    border: 2px dashed var(--border);
    border-radius: var(--radius);
    padding: 48px 24px;
    text-align: center;
    cursor: pointer;
    transition: border-color var(--transition), background var(--transition);
    background: var(--surface);
    animation: scaleIn 0.4s ease both;
}

.upload-zone:hover,
.upload-zone.dragover {
    border-color: var(--primary);
    background: #eef2ff;
}

.upload-icon {
    color: var(--text-secondary);
    margin-bottom: 12px;
}

.upload-text {
    font-weight: 600;
    margin-bottom: 4px;
}

.upload-subtext {
    color: var(--text-secondary);
    font-size: 0.85rem;
    margin-bottom: 12px;
}

/* ========== File List ========== */
.file-list {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 16px;
    margin-top: 16px;
}

.file-item {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 10px 12px;
    background: var(--bg);
    border-radius: var(--radius-sm);
    margin-bottom: 8px;
}

.file-item:last-child { margin-bottom: 0; }

.file-item-info {
    display: flex;
    align-items: center;
    gap: 10px;
    min-width: 0;
}

.file-item-icon {
    width: 36px;
    height: 36px;
    border-radius: 8px;
    background: var(--primary);
    color: white;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.75rem;
    font-weight: 700;
    flex-shrink: 0;
}

.file-item-name {
    font-size: 0.9rem;
    font-weight: 500;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.file-item-size {
    font-size: 0.75rem;
    color: var(--text-secondary);
}

.file-item-remove {
    background: none;
    border: none;
    cursor: pointer;
    color: var(--text-secondary);
    padding: 4px;
    border-radius: 4px;
    transition: color var(--transition);
    font-size: 1.1rem;
    flex-shrink: 0;
}

.file-item-remove:hover { color: var(--primary); }

.file-list-add {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    margin-top: 10px;
    padding: 8px 14px;
    font-size: 0.85rem;
    color: var(--primary);
    background: none;
    border: 1px dashed var(--primary);
    border-radius: var(--radius-sm);
    cursor: pointer;
    transition: background var(--transition);
}

.file-list-add:hover { background: #eef2ff; }

/* ========== CSV Preview Table ========== */
.csv-preview {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    margin-top: 16px;
    overflow: hidden;
}

.csv-preview-header {
    padding: 12px 16px;
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--text-secondary);
    border-bottom: 1px solid var(--border);
    background: var(--bg);
}

.csv-preview-scroll {
    overflow-x: auto;
    max-height: 320px;
    overflow-y: auto;
}

.csv-preview table {
    width: 100%;
    border-collapse: collapse;
    font-size: 0.8rem;
    white-space: nowrap;
}

.csv-preview th {
    background: var(--bg);
    font-weight: 600;
    text-align: left;
    padding: 8px 12px;
    border-bottom: 2px solid var(--border);
    position: sticky;
    top: 0;
}

.csv-preview td {
    padding: 6px 12px;
    border-bottom: 1px solid var(--border);
    max-width: 200px;
    overflow: hidden;
    text-overflow: ellipsis;
}

.csv-preview tr:hover td { background: #f0f4ff; }

/* ========== Options Form ========== */
.options-form {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 20px;
    margin-top: 16px;
}

.options-form h3 {
    font-size: 0.9rem;
    font-weight: 600;
    margin-bottom: 16px;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.04em;
}

.form-group {
    margin-bottom: 16px;
}

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

.form-group label {
    display: block;
    font-size: 0.85rem;
    font-weight: 500;
    margin-bottom: 6px;
}

.form-group input[type="text"],
.form-group input[type="password"],
.form-group input[type="number"],
.form-group select,
.form-group textarea {
    width: 100%;
    padding: 10px 12px;
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    font-size: 0.9rem;
    font-family: inherit;
    transition: border-color var(--transition);
    background: white;
}

.form-group textarea {
    min-height: 70px;
    resize: vertical;
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--primary);
}

.form-group input[type="range"] {
    width: 100%;
    accent-color: var(--primary);
}

.range-value {
    font-size: 0.8rem;
    color: var(--text-secondary);
    margin-top: 4px;
}

.form-group .hint {
    font-size: 0.75rem;
    color: var(--text-secondary);
    margin-top: 4px;
}

/* ========== Buttons ========== */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 12px 28px;
    border: none;
    border-radius: var(--radius-sm);
    font-size: 0.95rem;
    font-weight: 600;
    cursor: pointer;
    transition: background var(--transition), transform var(--transition);
}

.btn:active { transform: scale(0.98); }

.btn-primary {
    background: var(--primary);
    color: white;
    width: 100%;
    padding: 14px;
    font-size: 1rem;
}

.btn-primary:hover { background: var(--primary-hover); }
.btn-primary:disabled {
    opacity: 0.6;
    cursor: not-allowed;
}

.btn-upload {
    background: var(--primary);
    color: white;
    padding: 10px 24px;
}

.btn-upload:hover { background: var(--primary-hover); }

.btn-download {
    background: #22c55e;
    color: white;
    padding: 14px 32px;
    font-size: 1rem;
}

.btn-download:hover { background: #16a34a; }

.btn-secondary {
    background: var(--bg);
    color: var(--text);
    border: 1px solid var(--border);
    padding: 10px 20px;
}

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

.btn-icon {
    width: 32px;
    height: 32px;
    display: flex;
    align-items: center;
    justify-content: center;
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    background: var(--surface);
    cursor: pointer;
    font-size: 1.2rem;
    color: var(--text);
    transition: background var(--transition);
}

.btn-icon:hover { background: var(--border); }
.btn-icon:disabled { opacity: 0.4; cursor: not-allowed; }

/* ========== Action Bar ========== */
.action-bar {
    margin-top: 20px;
}

/* ========== Progress ========== */
.progress-container {
    margin-top: 20px;
    text-align: center;
}

.progress-bar {
    width: 100%;
    height: 8px;
    background: var(--border);
    border-radius: 4px;
    overflow: hidden;
}

.progress-fill {
    height: 100%;
    background: linear-gradient(90deg, var(--primary), #a855f7, var(--primary));
    background-size: 200% 100%;
    border-radius: 4px;
    width: 0%;
    transition: width 0.3s ease;
    animation: logoShimmer 1.5s ease infinite;
}

.progress-text {
    font-size: 0.85rem;
    color: var(--text-secondary);
    margin-top: 10px;
}

/* ========== Spinner ========== */
.spinner {
    width: 18px;
    height: 18px;
    border: 2px solid rgba(255,255,255,0.3);
    border-top-color: white;
    border-radius: 50%;
    animation: spin 0.6s linear infinite;
}

/* ========== Result ========== */
.result-area {
    margin-top: 20px;
    text-align: center;
    animation: scaleIn 0.35s ease both;
}

.result-success {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 40px 24px;
}

.result-success svg {
    color: #22c55e;
    margin-bottom: 12px;
}

.result-success p {
    font-weight: 600;
    margin-bottom: 20px;
}

.result-success .btn {
    margin: 0 6px 10px;
}

/* ========== JSON Result ========== */
.json-result {
    margin-top: 20px;
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    overflow: hidden;
}

.json-result-header {
    padding: 12px 16px;
    font-size: 0.9rem;
    font-weight: 600;
    border-bottom: 1px solid var(--border);
    background: var(--bg);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.json-result-body {
    padding: 16px;
    overflow-x: auto;
}

.json-result table {
    width: 100%;
    border-collapse: collapse;
    font-size: 0.8rem;
}

.json-result th {
    background: var(--bg);
    font-weight: 600;
    text-align: left;
    padding: 8px 12px;
    border-bottom: 2px solid var(--border);
}

.json-result td {
    padding: 6px 12px;
    border-bottom: 1px solid var(--border);
}

.json-result .badge-valid {
    display: inline-block;
    padding: 2px 10px;
    border-radius: 12px;
    font-size: 0.75rem;
    font-weight: 600;
    background: #dcfce7;
    color: #16a34a;
}

.json-result .badge-invalid {
    display: inline-block;
    padding: 2px 10px;
    border-radius: 12px;
    font-size: 0.75rem;
    font-weight: 600;
    background: #fef2f2;
    color: #dc2626;
}

/* ========== Diff Result ========== */
.diff-line-addition td { background: #dcfce7; }
.diff-line-deletion td { background: #fef2f2; }
.diff-line-separator td { background: #f0f4ff; font-weight: 600; color: var(--text-secondary); }
.diff-line-header td { font-weight: 600; color: var(--text-secondary); }
.diff-line-num { color: var(--text-secondary); font-size: 0.75rem; min-width: 40px; text-align: right; }
.diff-content { font-family: monospace; white-space: pre-wrap; word-break: break-all; }

.word-count-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(180px, 1fr));
    gap: 16px;
    padding: 20px;
}

.word-count-stat {
    text-align: center;
    padding: 16px;
    background: var(--bg);
    border-radius: var(--radius-sm);
}

.word-count-stat .stat-value {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--text);
}

.word-count-stat .stat-label {
    font-size: 0.8rem;
    color: var(--text-secondary);
    margin-top: 4px;
}

/* ========== Error ========== */
.error-area {
    margin-top: 20px;
    text-align: center;
    background: #fef2f2;
    border: 1px solid #fecaca;
    border-radius: var(--radius);
    padding: 24px;
}

.error-area p {
    color: #dc2626;
    font-weight: 500;
    margin-bottom: 16px;
}

/* ========== Crop Tool ========== */
.crop-container {
    margin-top: 16px;
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    overflow: hidden;
}

.crop-toolbar {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 12px 16px;
    border-bottom: 1px solid var(--border);
    background: var(--bg);
    flex-wrap: wrap;
    gap: 10px;
}

.crop-page-nav {
    display: flex;
    align-items: center;
    gap: 8px;
}

.crop-page-nav span {
    font-size: 0.85rem;
    font-weight: 500;
    min-width: 90px;
    text-align: center;
}

.crop-mode-toggle {
    display: flex;
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    overflow: hidden;
}

.crop-mode-btn {
    padding: 6px 14px;
    font-size: 0.8rem;
    font-weight: 500;
    border: none;
    background: var(--surface);
    cursor: pointer;
    transition: background var(--transition), color var(--transition);
    color: var(--text-secondary);
}

.crop-mode-btn + .crop-mode-btn {
    border-left: 1px solid var(--border);
}

.crop-mode-btn.active {
    background: var(--color-crop);
    color: white;
}

.crop-canvas-wrapper {
    position: relative;
    display: flex;
    justify-content: center;
    align-items: center;
    padding: 20px;
    background: #e5e7eb;
    min-height: 200px;
}

.crop-canvas-wrapper canvas {
    display: block;
    max-width: 100%;
    cursor: crosshair;
    box-shadow: var(--shadow-lg);
}

.crop-hint {
    position: absolute;
    bottom: 30px;
    left: 50%;
    transform: translateX(-50%);
    background: rgba(0,0,0,0.7);
    color: white;
    padding: 8px 16px;
    border-radius: 20px;
    font-size: 0.8rem;
    pointer-events: none;
    transition: opacity 0.3s ease;
}

.crop-hint.hidden { opacity: 0; }

.crop-info {
    padding: 10px 16px;
    font-size: 0.8rem;
    color: var(--text-secondary);
    border-top: 1px solid var(--border);
    text-align: center;
    min-height: 36px;
}

.crop-loading {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 12px;
    padding: 40px;
    color: var(--text-secondary);
}

.crop-loading .spinner {
    border-color: var(--border);
    border-top-color: var(--color-crop);
    width: 28px;
    height: 28px;
}

/* ========== Nepali Date Converter ========== */

.nepali-date-container {
    max-width: 620px;
    margin: 0 auto;
    display: flex;
    flex-direction: column;
    gap: 20px;
    animation: fadeInUp 0.35s ease both;
}

/* Direction bar */
.ndc-toolbar { display: flex; justify-content: center; }

.ndc-direction {
    display: inline-flex;
    align-items: center;
    gap: 4px;
    background: var(--surface);
    border: 1.5px solid var(--border);
    border-radius: 999px;
    padding: 4px 6px;
    box-shadow: 0 1px 4px rgba(0,0,0,0.06);
}

.ndc-dir-btn {
    padding: 9px 28px;
    font-size: 0.92rem;
    font-weight: 700;
    border-radius: 999px;
    border: none;
    cursor: pointer;
    background: none;
    color: var(--text-secondary);
    transition: background 0.2s, color 0.2s;
    white-space: nowrap;
    letter-spacing: 0.01em;
}
.ndc-dir-btn.active { background: var(--primary); color: #fff; }
.ndc-dir-btn:hover:not(.active) { background: rgba(99,102,241,0.08); color: var(--primary); }

.ndc-swap-btn {
    display: flex; align-items: center; justify-content: center;
    width: 36px; height: 36px;
    border-radius: 50%;
    border: 1.5px solid var(--border);
    background: var(--bg);
    cursor: pointer;
    color: var(--text-secondary);
    transition: color 0.15s, border-color 0.15s, background 0.15s, transform 0.25s;
    flex-shrink: 0;
}
.ndc-swap-btn:hover { color: var(--primary); border-color: var(--primary); background: rgba(99,102,241,0.06); transform: rotate(180deg); }

/* Date picker card */
.ndc-picker {
    background: var(--surface);
    border: 1.5px solid var(--border);
    border-radius: var(--radius);
    padding: 20px 24px;
    display: flex;
    flex-direction: column;
    gap: 14px;
    box-shadow: 0 2px 12px rgba(0,0,0,0.05);
}

.ndc-picker-row {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 10px;
}

.ndc-picker-label {
    display: flex;
    align-items: center;
    gap: 7px;
    font-size: 0.8rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.06em;
    color: var(--text-secondary);
}

.ndc-today-btn {
    padding: 5px 14px;
    font-size: 0.78rem;
    font-weight: 600;
    border: 1.5px solid var(--primary);
    border-radius: 999px;
    background: rgba(99,102,241,0.06);
    color: var(--primary);
    cursor: pointer;
    transition: background 0.15s, color 0.15s;
}
.ndc-today-btn:hover { background: var(--primary); color: #fff; }

/* Native date input */
.ndc-date-input {
    width: 100%;
    padding: 13px 16px;
    font-size: 1.1rem;
    font-weight: 500;
    border: 1.5px solid var(--border);
    border-radius: var(--radius-sm);
    outline: none;
    background: var(--bg);
    color: var(--text);
    cursor: pointer;
    transition: border-color 0.2s, box-shadow 0.2s;
    box-sizing: border-box;
    accent-color: var(--primary);
}
.ndc-date-input:focus { border-color: var(--primary); box-shadow: 0 0 0 3px rgba(99,102,241,0.12); }

/* BS selects row */
.ndc-bs-fields {
    display: grid;
    grid-template-columns: 1fr 2fr 1fr;
    gap: 12px;
}

.ndc-field {
    display: flex;
    flex-direction: column;
    gap: 6px;
}

.ndc-field-label {
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--text-secondary);
}

.ndc-num-input, .ndc-select {
    padding: 11px 14px;
    font-size: 1rem;
    font-weight: 500;
    border: 1.5px solid var(--border);
    border-radius: var(--radius-sm);
    outline: none;
    background: var(--bg);
    color: var(--text);
    transition: border-color 0.2s, box-shadow 0.2s;
    width: 100%;
    box-sizing: border-box;
    accent-color: var(--primary);
}
.ndc-num-input:focus, .ndc-select:focus { border-color: var(--primary); box-shadow: 0 0 0 3px rgba(99,102,241,0.12); }
.ndc-select { cursor: pointer; }

/* Result cards */
.ndc-result-cards {
    display: grid;
    grid-template-columns: 1fr auto 1fr;
    align-items: center;
    gap: 12px;
    animation: fadeInUp 0.3s ease both;
}

.ndc-card {
    border-radius: var(--radius);
    padding: 24px 20px;
    text-align: center;
    border: 1.5px solid var(--border);
}

.ndc-card-input {
    background: var(--surface);
}

.ndc-card-output {
    background: rgba(99,102,241,0.06);
    border-color: rgba(99,102,241,0.3);
    box-shadow: 0 2px 12px rgba(99,102,241,0.1);
}

.ndc-card-badge {
    display: inline-block;
    font-size: 0.68rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    color: var(--text-secondary);
    background: var(--bg);
    border: 1px solid var(--border);
    border-radius: 999px;
    padding: 3px 10px;
    margin-bottom: 14px;
}

.ndc-card-output .ndc-card-badge {
    color: var(--primary);
    background: rgba(99,102,241,0.08);
    border-color: rgba(99,102,241,0.25);
}

.ndc-card-year {
    font-size: 2.6rem;
    font-weight: 800;
    color: var(--text);
    line-height: 1;
    margin-bottom: 6px;
    letter-spacing: -0.02em;
}

.ndc-card-output .ndc-card-year { color: var(--primary); }

.ndc-card-date {
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--text);
    margin-bottom: 8px;
}

.ndc-card-np {
    font-size: 0.95rem;
    color: var(--text-secondary);
    line-height: 1.6;
}

.ndc-arrow-icon {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 36px;
    height: 36px;
    border-radius: 50%;
    background: var(--primary);
    color: #fff;
    font-size: 1rem;
    flex-shrink: 0;
    box-shadow: 0 2px 8px rgba(99,102,241,0.3);
}

.ndc-loading {
    text-align: center;
    color: var(--text-secondary);
    font-size: 0.9rem;
    padding: 16px 0;
}

@media (max-width: 580px) {
    .ndc-dir-btn { padding: 8px 16px; font-size: 0.82rem; }
    .ndc-bs-fields { grid-template-columns: 1fr 1fr; }
    .ndc-field-month { grid-column: 1 / -1; }
    .ndc-result-cards { grid-template-columns: 1fr; }
    .ndc-arrow-icon { transform: rotate(90deg); margin: 0 auto; }
    .ndc-card-year { font-size: 2rem; }
}

/* ========== Nepali Unicode Live Translator ========== */

.nepali-unicode-container {
    animation: fadeInUp 0.35s ease both;
}

.nuc-toolbar {
    display: flex;
    justify-content: center;
    margin-bottom: 18px;
}

.nuc-direction {
    display: inline-flex;
    align-items: center;
    gap: 4px;
    background: var(--surface);
    border: 1.5px solid var(--border);
    border-radius: 999px;
    padding: 4px 6px;
    box-shadow: 0 1px 4px rgba(0,0,0,0.06);
}

.nuc-dir-btn {
    padding: 8px 22px;
    font-size: 0.88rem;
    font-weight: 600;
    border-radius: 999px;
    border: none;
    cursor: pointer;
    background: none;
    color: var(--text-secondary);
    transition: background 0.2s, color 0.2s;
    white-space: nowrap;
}
.nuc-dir-btn.active { background: var(--primary); color: #fff; }
.nuc-dir-btn:hover:not(.active) { background: rgba(99,102,241,0.08); color: var(--primary); }

.nuc-swap-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 36px;
    height: 36px;
    border-radius: 50%;
    border: 1.5px solid var(--border);
    background: var(--bg);
    cursor: pointer;
    color: var(--text-secondary);
    transition: color 0.15s, border-color 0.15s, background 0.15s, transform 0.2s;
    flex-shrink: 0;
}
.nuc-swap-btn:hover { color: var(--primary); border-color: var(--primary); background: rgba(99,102,241,0.06); transform: rotate(180deg); }

.nuc-panels {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 16px;
}

.nuc-panel {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.nuc-panel-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: 4px;
}

.nuc-label {
    font-size: 0.75rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.06em;
    color: var(--text-secondary);
}

.nuc-count, .nuc-status {
    font-size: 0.75rem;
    color: var(--text-secondary);
}

.nuc-textarea {
    flex: 1;
    min-height: 300px;
    padding: 18px;
    font-size: 1.2rem;
    line-height: 1.85;
    border: 1.5px solid var(--border);
    border-radius: var(--radius-sm);
    resize: vertical;
    outline: none;
    transition: border-color 0.2s, box-shadow 0.2s;
    font-family: inherit;
    background: var(--surface);
    color: var(--text);
    box-sizing: border-box;
    width: 100%;
}
.nuc-textarea:focus {
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(99,102,241,0.12);
}
.nuc-textarea::placeholder { color: #bbb; }

.nuc-output {
    background: #f0fdf4;
    border-color: #bbf7d0;
    color: #14532d;
    cursor: default;
    font-size: 1.3rem;
}
.nuc-output[data-lang="roman"] { font-size: 1.2rem; }

.nuc-actions {
    display: flex;
    justify-content: flex-end;
    gap: 8px;
}

.nuc-btn {
    padding: 6px 16px;
    font-size: 0.8rem;
    font-weight: 500;
    border: 1.5px solid var(--border);
    border-radius: 6px;
    background: var(--bg);
    color: var(--text-secondary);
    cursor: pointer;
    transition: color 0.15s, border-color 0.15s, background 0.15s;
}
.nuc-btn:hover { color: var(--text); border-color: #aaa; }
.nuc-copy-btn.copied { color: #14532d; border-color: #86efac; background: #f0fdf4; }

@media (max-width: 640px) {
    .nuc-panels { grid-template-columns: 1fr; }
    .nuc-textarea { min-height: 200px; }
    .nuc-dir-btn { padding: 7px 14px; font-size: 0.8rem; }
}

/* ========== Remove Background Tool ========== */

.rembg-container {
    display: flex;
    flex-direction: column;
    gap: 20px;
    animation: fadeInUp 0.3s ease both;
}

.rembg-workspace {
    display: grid;
    grid-template-columns: 1fr 280px;
    gap: 16px;
    align-items: start;
}

/* Drop / preview zone */
.rembg-drop-zone {
    position: relative;
    border: 2px dashed var(--border);
    border-radius: 16px;
    background: var(--surface);
    cursor: pointer;
    min-height: 380px;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
    transition: border-color 0.2s, background 0.2s;
}
.rembg-drop-zone:hover,
.rembg-drop-zone.drag-over {
    border-color: var(--primary);
    background: rgba(99,102,241,0.04);
}

.rembg-placeholder {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 10px;
    color: var(--text-muted);
    text-align: center;
    padding: 40px;
    pointer-events: none;
}
.rembg-placeholder svg { opacity: 0.35; }
.rembg-placeholder p {
    font-size: 1rem;
    font-weight: 600;
    color: var(--text);
    margin: 0;
}
.rembg-placeholder span { font-size: 0.8rem; }

.rembg-preview {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 10px;
    padding: 16px;
    width: 100%;
}
.rembg-preview img {
    max-width: 100%;
    max-height: 320px;
    object-fit: contain;
    border-radius: 10px;
    box-shadow: 0 4px 20px rgba(0,0,0,0.12);
}
.rembg-preview-meta {
    font-size: 0.78rem;
    color: var(--text-muted);
}
.rembg-change-btn {
    background: transparent;
    border: 1px solid var(--border);
    color: var(--text-muted);
    padding: 5px 14px;
    border-radius: 20px;
    font-size: 0.78rem;
    cursor: pointer;
    transition: border-color 0.2s, color 0.2s;
}
.rembg-change-btn:hover { border-color: var(--primary); color: var(--primary); }

/* Settings panel */
.rembg-settings-panel {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: 16px;
    padding: 18px;
    display: flex;
    flex-direction: column;
    gap: 18px;
}
.rembg-settings-title {
    font-size: 0.78rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.07em;
    color: var(--text-muted);
    margin: 0;
}
.rembg-setting { display: flex; flex-direction: column; gap: 7px; }
.rembg-setting-label {
    font-size: 0.83rem;
    font-weight: 600;
    color: var(--text);
}
.rembg-select {
    width: 100%;
    padding: 8px 10px;
    border: 1px solid var(--border);
    border-radius: 8px;
    background: var(--bg);
    color: var(--text);
    font-size: 0.83rem;
    cursor: pointer;
}
.rembg-bgcolor-row {
    display: flex;
    flex-wrap: wrap;
    gap: 6px;
    align-items: center;
}
.rembg-bg-opt {
    padding: 4px 12px;
    border: 1.5px solid var(--border);
    border-radius: 20px;
    background: var(--bg);
    font-size: 0.78rem;
    cursor: pointer;
    transition: all 0.15s;
    color: var(--text);
}
.rembg-bg-opt.active {
    border-color: var(--primary);
    color: var(--primary);
    background: rgba(99,102,241,0.08);
    font-weight: 600;
}
.rembg-color-swatch {
    display: flex;
    align-items: center;
    gap: 5px;
    padding: 4px 10px;
    border: 1.5px solid var(--border);
    border-radius: 20px;
    background: var(--bg);
    font-size: 0.78rem;
    cursor: pointer;
    color: var(--text);
    transition: border-color 0.15s;
}
.rembg-color-swatch:hover { border-color: var(--primary); }
.rembg-color-swatch input[type="color"] {
    width: 16px;
    height: 16px;
    border: none;
    background: none;
    padding: 0;
    cursor: pointer;
}
.rembg-toggle-row {
    display: flex;
    align-items: flex-start;
    gap: 9px;
    cursor: pointer;
}
.rembg-checkbox { flex-shrink: 0; margin-top: 2px; accent-color: var(--primary); }
.rembg-toggle-label { font-size: 0.83rem; color: var(--text); }
.rembg-toggle-hint { font-size: 0.75rem; color: var(--text-muted); display: block; }

.rembg-submit-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    width: 100%;
    padding: 12px;
    background: var(--primary);
    color: #fff;
    border: none;
    border-radius: 10px;
    font-size: 0.9rem;
    font-weight: 700;
    cursor: pointer;
    transition: background 0.2s, opacity 0.2s;
    margin-top: auto;
}
.rembg-submit-btn:disabled { opacity: 0.45; cursor: not-allowed; }
.rembg-submit-btn:not(:disabled):hover { background: #4f46e5; }
.rembg-submit-btn.processing { opacity: 0.75; cursor: wait; }

/* Comparison area */
.rembg-compare {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: 16px;
    padding: 20px 24px;
    animation: fadeInUp 0.3s ease both;
}
.rembg-compare-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 18px;
    flex-wrap: wrap;
    gap: 10px;
}
.rembg-compare-title {
    font-size: 0.78rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.07em;
    color: var(--text-muted);
}
.rembg-download-btn {
    display: inline-flex;
    align-items: center;
    gap: 7px;
    padding: 9px 20px;
    background: linear-gradient(135deg, var(--primary) 0%, #4f46e5 100%);
    color: #fff;
    border: none;
    border-radius: 30px;
    font-size: 0.85rem;
    font-weight: 700;
    cursor: pointer;
    box-shadow: 0 3px 12px rgba(99,102,241,0.3);
    transition: transform 0.15s, box-shadow 0.15s;
}
.rembg-download-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 5px 18px rgba(99,102,241,0.4);
}
.rembg-compare-panels {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 16px;
    flex-wrap: wrap;
}
.rembg-compare-card {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 8px;
}
.rembg-compare-label {
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--text-muted);
}
.rembg-thumb-wrap {
    width: 260px;
    height: 260px;
    border-radius: 12px;
    border: 1px solid var(--border);
    overflow: hidden;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--bg);
}
.rembg-checkerboard {
    background-image: repeating-conic-gradient(#d1d5db 0% 25%, #ffffff 0% 50%);
    background-size: 18px 18px;
}
.rembg-thumb {
    max-width: 100%;
    max-height: 100%;
    object-fit: contain;
}
.rembg-compare-arrow {
    color: var(--text-muted);
    flex-shrink: 0;
}
.rembg-result-card .rembg-thumb-wrap {
    box-shadow: 0 4px 16px rgba(99,102,241,0.15);
    border-color: rgba(99,102,241,0.25);
}

@media (max-width: 680px) {
    .rembg-workspace { grid-template-columns: 1fr; }
    .rembg-drop-zone { min-height: 260px; }
    .rembg-thumb-wrap { width: 200px; height: 200px; }
}

/* ========== Nepali Tool Results ========== */
.nepali-result-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 16px;
    padding: 24px;
}

.nepali-result-card {
    padding: 24px;
    border-radius: var(--radius-sm);
    text-align: center;
}

.nepali-result-card.input-card {
    background: var(--bg);
}

.nepali-result-card.result-card {
    background: #f0fdf4;
    border: 1px solid #bbf7d0;
}

.nepali-result-label {
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--text-secondary);
    margin-bottom: 8px;
}

.nepali-result-value {
    font-size: 1.75rem;
    font-weight: 700;
    color: var(--text);
    margin-bottom: 6px;
}

.nepali-result-detail {
    font-size: 0.85rem;
    color: var(--text-secondary);
    margin-top: 4px;
}

.nepali-unicode-result {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 16px;
    padding: 24px;
}

.unicode-input-box,
.unicode-output-box {
    padding: 20px;
    border-radius: var(--radius-sm);
}

.unicode-input-box {
    background: var(--bg);
}

.unicode-output-box {
    background: #f0fdf4;
    border: 1px solid #bbf7d0;
}

.unicode-text {
    font-size: 1.1rem;
    line-height: 1.8;
    word-break: break-word;
    white-space: pre-wrap;
    min-height: 60px;
}

.unicode-output {
    font-size: 1.3rem;
    font-weight: 500;
}

@media (max-width: 640px) {
    .nepali-result-grid,
    .nepali-unicode-result {
        grid-template-columns: 1fr;
    }
}

/* ========== All Tools Map ========== */
.all-tools-map {
    border-top: 1px solid var(--border);
    margin-top: 32px;
    padding-top: 40px;
    padding-bottom: 48px;
}

.tools-map-header {
    text-align: center;
    margin-bottom: 36px;
}

.tools-map-header h2 {
    font-size: 1.5rem;
    font-weight: 700;
    margin-bottom: 8px;
}

.tools-map-header p {
    color: var(--text-secondary);
    font-size: 0.95rem;
}

.tools-map-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
    gap: 32px;
}

.tools-map-column h3 {
    font-size: 0.8rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.06em;
    margin-bottom: 12px;
    padding-bottom: 8px;
    border-bottom: 2px solid var(--border);
}

.tools-map-column ul {
    list-style: none;
}

.tools-map-column li {
    margin-bottom: 2px;
}

.tools-map-column li a {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 6px 8px;
    border-radius: var(--radius-sm);
    text-decoration: none;
    color: var(--text);
    font-size: 0.85rem;
    font-weight: 500;
    transition: background var(--transition);
}

.tools-map-column li a:hover {
    background: var(--bg);
}

.tools-map-icon {
    width: 28px;
    height: 28px;
    border-radius: 6px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.65rem;
    font-weight: 700;
    color: white;
    flex-shrink: 0;
}

@media (max-width: 640px) {
    .tools-map-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 24px;
    }
}

@media (max-width: 380px) {
    .tools-map-grid {
        grid-template-columns: 1fr;
    }
}

/* ========== Footer ========== */
footer {
    text-align: center;
    padding: 24px;
    color: var(--text-secondary);
    font-size: 0.85rem;
    border-top: 1px solid var(--border);
    margin-top: auto;
}

.footer-love {
    margin-top: 6px;
    font-size: 0.8rem;
    color: var(--text-secondary);
    animation: fadeIn 1.2s ease both;
}

/* ========== Sign Tool ========== */

/* ===== Sign Tool ===== */

.tool-workspace.sign-mode { max-width: 1100px; }

.sign-container {
    margin-top: 16px;
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    overflow: hidden;
    animation: fadeInUp 0.4s ease both;
}

/* Two-column layout */
.sign-panels {
    display: grid;
    grid-template-columns: 360px 1fr;
    min-height: 700px;
}

/* ---- Left panel ---- */
.sign-draw-panel {
    border-right: 1px solid var(--border);
    display: flex;
    flex-direction: column;
    background: var(--surface);
}

/* Tab bar */
.sign-tab-bar {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    border-bottom: 1px solid var(--border);
    background: var(--bg);
    flex-shrink: 0;
}

.sign-tab {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 6px;
    padding: 13px 6px;
    font-size: 0.82rem;
    font-weight: 600;
    color: var(--text-secondary);
    background: none;
    border: none;
    border-bottom: 2px solid transparent;
    cursor: pointer;
    transition: color 0.15s, border-color 0.15s, background 0.15s;
}
.sign-tab:hover { color: var(--primary); background: rgba(99,102,241,0.04); }
.sign-tab.active { color: var(--primary); border-bottom-color: var(--primary); background: rgba(99,102,241,0.06); }

/* Panes */
.sign-tab-pane {
    flex: 1;
    display: flex;
    flex-direction: column;
    gap: 12px;
    padding: 16px;
    min-height: 0;
}

/* ---- Draw pane ---- */
.sign-canvas-wrap {
    position: relative;
    border: 2px dashed var(--border);
    border-radius: var(--radius-sm);
    overflow: hidden;
    background: #fff;
    cursor: crosshair;
    transition: border-color var(--transition), box-shadow var(--transition);
    flex: 1;
    min-height: 200px;
}
.sign-canvas-wrap:hover, .sign-canvas-wrap.active {
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(99,102,241,0.12);
}
.sign-canvas-wrap canvas {
    display: block;
    touch-action: none;
    /* width/height set in JS to exactly match wrapper dimensions (HiDPI-aware) */
}
.sign-canvas-placeholder {
    position: absolute;
    inset: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.3rem;
    font-family: 'Dancing Script', cursive;
    color: #bbb;
    pointer-events: none;
    transition: opacity 0.2s;
}
.sign-baseline {
    position: absolute;
    bottom: 28%;
    left: 8%;
    right: 8%;
    height: 1px;
    background: rgba(99,102,241,0.3);
    pointer-events: none;
}

/* Draw toolbar */
.sign-draw-toolbar {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 10px;
    flex-shrink: 0;
}
.sign-pen-options {
    display: flex;
    align-items: center;
    gap: 8px;
    flex-wrap: wrap;
}
.sign-sep {
    width: 1px;
    height: 18px;
    background: var(--border);
}
.sign-draw-actions {
    display: flex;
    align-items: center;
    gap: 6px;
}
.sign-action-btn {
    display: inline-flex;
    align-items: center;
    gap: 5px;
    padding: 5px 12px;
    font-size: 0.8rem;
    font-weight: 500;
    color: var(--text-secondary);
    background: var(--bg);
    border: 1px solid var(--border);
    border-radius: 6px;
    cursor: pointer;
    transition: color 0.15s, background 0.15s, border-color 0.15s;
}
.sign-action-btn:hover { color: var(--text); border-color: #aaa; }

/* Color swatches */
.sign-color-btn {
    width: 26px;
    height: 26px;
    border-radius: 50%;
    border: 3px solid #fff;
    box-shadow: 0 0 0 2px var(--border);
    cursor: pointer;
    transition: transform 0.15s, box-shadow 0.15s;
    flex-shrink: 0;
}
.sign-color-btn.selected { box-shadow: 0 0 0 3px var(--primary); transform: scale(1.18); }
.sign-color-btn:hover:not(.selected) { transform: scale(1.1); }

.sign-thickness {
    width: 80px;
    accent-color: var(--primary);
    cursor: pointer;
}

/* ---- Type pane ---- */
.sign-type-input {
    width: 100%;
    padding: 11px 14px;
    font-size: 1rem;
    border: 1.5px solid var(--border);
    border-radius: var(--radius-sm);
    outline: none;
    transition: border-color 0.2s, box-shadow 0.2s;
    box-sizing: border-box;
}
.sign-type-input:focus {
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(99,102,241,0.12);
}

.sign-font-list {
    display: flex;
    flex-direction: column;
    gap: 7px;
    flex: 1;
    overflow-y: auto;
    min-height: 0;
}
.sign-font-option {
    display: flex;
    align-items: center;
    padding: 9px 12px;
    border: 1.5px solid var(--border);
    border-radius: var(--radius-sm);
    cursor: pointer;
    transition: border-color 0.15s, background 0.15s;
    overflow: hidden;
    gap: 10px;
}
.sign-font-option:hover { border-color: var(--primary); background: rgba(99,102,241,0.04); }
.sign-font-option.selected { border-color: var(--primary); background: rgba(99,102,241,0.08); }
.sign-font-option .font-preview {
    font-size: 1.55rem;
    flex: 1;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
    line-height: 1.2;
}
.sign-font-option .font-check {
    width: 18px;
    height: 18px;
    border-radius: 50%;
    border: 2px solid var(--border);
    flex-shrink: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: background 0.15s, border-color 0.15s;
    font-size: 10px;
    color: transparent;
}
.sign-font-option.selected .font-check {
    background: var(--primary);
    border-color: var(--primary);
    color: #fff;
    font-weight: 700;
}

/* ---- Upload pane ---- */
.sign-upload-zone {
    flex: 1;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 8px;
    border: 2px dashed var(--border);
    border-radius: var(--radius-sm);
    background: var(--bg);
    cursor: pointer;
    transition: border-color 0.2s, background 0.2s;
    padding: 28px 16px;
    text-align: center;
    color: var(--text-secondary);
    min-height: 180px;
}
.sign-upload-zone:hover, .sign-upload-zone.dragover {
    border-color: var(--primary);
    background: rgba(99,102,241,0.04);
    color: var(--primary);
}
.sign-upload-zone p { font-size: 0.9rem; font-weight: 500; margin: 0; }
.sign-upload-zone span { font-size: 0.78rem; opacity: 0.7; }

.sign-upload-preview {
    flex: 1;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 12px;
    padding: 8px 0;
}
.sign-upload-preview img {
    max-width: 100%;
    max-height: 160px;
    object-fit: contain;
    border-radius: 6px;
    border: 1px solid var(--border);
    background: #fff;
    padding: 8px;
}

/* Panel footer */
.sign-panel-footer {
    padding: 12px 16px;
    border-top: 1px solid var(--border);
    background: var(--bg);
    flex-shrink: 0;
}
.sign-apply-all {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 0.85rem;
    cursor: pointer;
    user-select: none;
}
.sign-apply-all input[type="checkbox"] {
    width: 16px;
    height: 16px;
    accent-color: var(--primary);
    cursor: pointer;
}

/* ---- Right panel ---- */
.sign-place-panel {
    padding: 16px;
    display: flex;
    flex-direction: column;
    gap: 12px;
    background: #eeeef6;
}
.sign-place-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: 10px;
    flex-shrink: 0;
}
.sign-place-hint {
    font-size: 0.75rem;
    color: var(--text-secondary);
}
.sign-page-nav {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 0.85rem;
}
.sign-page-nav span {
    min-width: 80px;
    text-align: center;
    font-weight: 600;
}

/* Large PDF preview */
.sign-preview-wrap {
    position: relative;
    flex: 1;
    display: flex;
    align-items: flex-start;
    justify-content: center;
    background: #c8c8d8;
    border-radius: var(--radius-sm);
    overflow: hidden;
    min-height: 520px;
    box-shadow: inset 0 2px 8px rgba(0,0,0,0.08);
}
.sign-preview-wrap canvas {
    display: block;
    width: 100%;
    height: auto;
    box-shadow: 0 4px 20px rgba(0,0,0,0.18);
}

/* Draggable overlay */
.sign-sig-overlay {
    position: absolute;
    cursor: move;
    border: 2px dashed rgba(99,102,241,0.85);
    border-radius: 4px;
    user-select: none;
    touch-action: none;
    box-shadow: 0 2px 10px rgba(0,0,0,0.15);
    background: rgba(255,255,255,0.04);
}
.sign-sig-overlay img {
    display: block;
    width: 100%;
    height: 100%;
    object-fit: contain;
    pointer-events: none;
    border-radius: 2px;
}
.sign-sig-overlay .resize-handle {
    position: absolute;
    bottom: -7px;
    right: -7px;
    width: 16px;
    height: 16px;
    background: var(--primary);
    border: 2px solid #fff;
    border-radius: 4px;
    cursor: se-resize;
    z-index: 2;
    box-shadow: 0 1px 4px rgba(0,0,0,0.2);
}

/* Mobile */
@media (max-width: 760px) {
    .sign-panels { grid-template-columns: 1fr; min-height: unset; }
    .sign-draw-panel { border-right: none; border-bottom: 1px solid var(--border); }
    .sign-preview-wrap { min-height: 340px; }
    .tool-workspace.sign-mode { max-width: 100%; }
}

/* ========== Responsive ========== */
@media (max-width: 640px) {
    .hero h1 { font-size: 1.5rem; }
    .category-grid { grid-template-columns: 1fr; }
    .tool-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 10px;
    }
    .tool-card { padding: 18px 14px; }
    .tool-card-icon { width: 44px; height: 44px; font-size: 1.2rem; }
    .upload-zone { padding: 32px 16px; }
    .dashboard-header { flex-direction: column; text-align: center; }
}

@media (max-width: 380px) {
    .tool-grid { grid-template-columns: 1fr; }
}