/* ============================================
   Default Theme - Clean & Minimal
   A plain, modern design with space-saving
   aesthetics and familiar controls
   ============================================ */

/* Default Color Variables */
:root {
    --default-bg-primary: #f8f9fa;
    --default-bg-secondary: #ffffff;
    --default-bg-tertiary: #f1f3f5;
    --default-bg-elevated: #ffffff;
    --default-bg-card: #ffffff;

    --default-primary: #0d6efd;
    --default-primary-hover: #0b5ed7;
    --default-secondary: #6c757d;
    --default-success: #198754;
    --default-danger: #dc3545;
    --default-warning: #ffc107;
    --default-info: #0dcaf0;

    --default-text-primary: #212529;
    --default-text-secondary: #495057;
    --default-text-muted: #6c757d;

    --default-border: #dee2e6;
    --default-border-light: #e9ecef;

    /* Footer variables */
    --footer-bg: var(--default-bg-tertiary);
    --footer-border: var(--default-border);
    --footer-link: var(--default-text-secondary);
    --footer-link-hover: var(--default-primary);
    --footer-separator: var(--default-border);
    --footer-text: var(--default-text-muted);
}

html,
html,
body {
    height: 100%;
    overflow: hidden;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    font-size: 13px;
    margin: 0;
    padding: 0;
    background-color: var(--default-bg-primary);
    color: var(--default-text-primary);
    line-height: 1.5;
}

.page {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    display: flex;
    flex-direction: column;
    background-color: var(--default-bg-primary);
    overflow: hidden;
}

main {
    flex: 1;
    overflow: auto;
    margin-bottom: 45px;
    /* Space for fixed footer */
}

/* ============================================
   Navigation Bar
   ============================================ */
.navbar {
    background-color: var(--default-bg-secondary) !important;
    border-bottom: 1px solid var(--default-border);
    padding: 2px 8px !important;
    min-height: 28px;
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.05);
}

.navbar-brand {
    font-size: 13px !important;
    font-weight: 600;
    color: var(--default-text-primary) !important;
    padding: 2px 4px !important;
}

.navbar-nav {
    flex-direction: row;
    align-items: center;
    gap: 0.25rem;
}

.navbar-nav .nav-link {
    color: var(--default-text-secondary) !important;
    font-size: 11px;
    padding: 2px 8px !important;
    border-radius: 4px;
    transition: all 0.15s ease;
}

.navbar-nav .nav-link:hover {
    background-color: var(--default-bg-tertiary);
    color: var(--default-text-primary) !important;
}

/* ============================================
   Paintboard Container
   ============================================ */
.paintboard-container {
    display: flex;
    flex-direction: column;
    height: 100%;
    background-color: var(--default-bg-primary);
}

/* ============================================
   Toolbar
   ============================================ */
.toolbar {
    background-color: var(--default-bg-secondary);
    padding: 2px 4px;
    border-bottom: 1px solid var(--default-border);
    display: flex;
    flex-wrap: nowrap;
    gap: 2px;
    align-items: center;
    min-height: 26px;
    overflow-x: auto;
    overflow-y: hidden;
    -webkit-overflow-scrolling: touch;
}

.toolbar::-webkit-scrollbar {
    height: 4px;
}

.toolbar::-webkit-scrollbar-track {
    background: var(--default-bg-tertiary);
}

.toolbar::-webkit-scrollbar-thumb {
    background: var(--default-border);
    border-radius: 2px;
}

.tool-group {
    display: flex;
    align-items: center;
    gap: 2px;
    flex-shrink: 0;
}

/* ============================================
   Tool Buttons
   ============================================ */
.tool-btn {
    padding: 3px 8px;
    margin: 1px;
    background-color: var(--default-bg-secondary);
    border: 1px solid var(--default-border);
    border-radius: 4px;
    cursor: pointer;
    font-size: 11px;
    font-family: inherit;
    white-space: nowrap;
    flex-shrink: 0;
    color: var(--default-text-primary);
    transition: all 0.15s ease;
}

.tool-btn:hover {
    background-color: var(--default-bg-tertiary);
    border-color: var(--default-border);
    color: var(--default-text-primary);
}

.tool-btn:active {
    background-color: var(--default-border-light);
}

.tool-btn.active {
    background-color: var(--default-primary);
    border-color: var(--default-primary);
    color: #ffffff;
}

.tool-btn.premium {
    background-color: #fff3cd;
    border-color: #ffc107;
    color: #664d03;
}

.tool-btn.premium:hover {
    background-color: #ffecb5;
}

.tool-btn.btn-danger {
    background-color: #f8d7da;
    border-color: var(--default-danger);
    color: var(--default-danger);
}

.tool-btn.btn-danger:hover {
    background-color: #f1aeb5;
}

/* Toolbar Separator */
.toolbar-separator {
    width: 1px;
    height: 20px;
    background-color: var(--default-border);
    margin: 0 4px;
}

/* ============================================
   Sidebar Tool Buttons
   ============================================ */
.tool-btn-vertical {
    width: 32px;
    height: 32px;
    padding: 4px;
    margin: 1px;
    background-color: var(--default-bg-secondary);
    border: 1px solid var(--default-border);
    border-radius: 4px;
    cursor: pointer;
    font-size: 14px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--default-text-primary);
    transition: all 0.15s ease;
}

.tool-btn-vertical:hover {
    background-color: var(--default-bg-tertiary);
    color: var(--default-text-primary);
}

.tool-btn-vertical.active {
    background-color: var(--default-primary);
    border-color: var(--default-primary);
    color: #ffffff;
}

.tool-btn-vertical.submenu-open {
    background-color: var(--default-bg-tertiary);
    border-color: var(--default-primary);
}

/* ============================================
   Tool Sub-menu (Pop-out Premium Feature)
   ============================================ */
.tool-with-submenu {
    position: relative;
}

.submenu-indicator {
    position: absolute;
    right: 2px;
    bottom: 2px;
    font-size: 8px;
    opacity: 0.6;
    color: inherit;
}

.tool-btn-vertical.active .submenu-indicator {
    color: #ffffff;
}

.tool-submenu {
    position: absolute;
    left: 100%;
    top: 0;
    min-width: 140px;
    background-color: var(--default-bg-elevated);
    border: 1px solid var(--default-border);
    border-radius: 6px;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
    z-index: 1000;
    padding: 4px;
    margin-left: 4px;
    animation: submenu-slide-in 0.15s ease-out;
}

@keyframes submenu-slide-in {
    from {
        opacity: 0;
        transform: translateX(-8px);
    }

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

.submenu-header {
    font-size: 10px;
    font-weight: 600;
    color: var(--default-text-muted);
    padding: 4px 8px;
    border-bottom: 1px solid var(--default-border-light);
    margin-bottom: 4px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.premium-badge {
    font-size: 9px;
    color: #f59e0b;
}

.submenu-premium-hint {
    padding: 8px 10px;
    font-size: 11px;
    color: #888;
    border-top: 1px solid var(--default-border-color, #eee);
    margin-top: 4px;
}

.submenu-premium-hint a {
    color: var(--default-primary, #4f46e5);
    text-decoration: none;
    font-weight: 600;
}

.submenu-premium-hint a:hover {
    text-decoration: underline;
}

/* ================================================================
   GRADIENT (inside Fill Tools submenu)
   ================================================================ */

.gradient-presets {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4px;
    padding: 4px;
}

.gradient-preset-btn {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 4px;
    padding: 6px;
    border: 2px solid transparent;
    border-radius: 6px;
    background: var(--default-bg);
    cursor: pointer;
    transition: all 0.15s ease;
}
.gradient-preset-btn:hover {
    border-color: var(--default-accent);
}
.gradient-preset-btn.active {
    border-color: var(--default-accent);
    background-color: var(--default-accent-light);
}

.gradient-swatch {
    width: 100%;
    height: 28px;
    border-radius: 4px;
    border: 1px solid rgba(0,0,0,0.1);
}

.gradient-preset-name {
    font-size: 9px;
    font-weight: 600;
    color: var(--default-text-muted);
    text-transform: uppercase;
    letter-spacing: 0.3px;
}

.gradient-custom-section {
    padding: 4px;
    border-top: 1px solid var(--default-border);
    margin-top: 4px;
}

.gradient-custom-preview {
    width: 100%;
    height: 24px;
    border-radius: 4px;
    border: 1px solid rgba(0,0,0,0.1);
    margin-bottom: 8px;
}

.gradient-stops {
    display: flex;
    flex-direction: column;
    gap: 4px;
    margin-bottom: 6px;
}

.gradient-stop-row {
    display: flex;
    align-items: center;
    gap: 4px;
}

.gradient-stop-color {
    width: 24px;
    height: 24px;
    padding: 1px;
    border: 1px solid var(--default-border);
    border-radius: 4px;
    cursor: pointer;
    flex-shrink: 0;
}

.gradient-stop-offset {
    flex: 1;
    height: 18px;
    cursor: pointer;
}

.gradient-stop-remove {
    width: 20px;
    height: 20px;
    border: none;
    background: none;
    color: var(--default-text-muted);
    cursor: pointer;
    padding: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 10px;
    border-radius: 3px;
    flex-shrink: 0;
}
.gradient-stop-remove:hover {
    color: #e74c3c;
    background: rgba(231,76,60,0.1);
}

.gradient-add-stop-btn {
    width: 100%;
    padding: 4px;
    border: 1px dashed var(--default-border);
    border-radius: 4px;
    background: none;
    color: var(--default-text-muted);
    cursor: pointer;
    font-size: 11px;
    margin-bottom: 6px;
    transition: all 0.15s ease;
}
.gradient-add-stop-btn:hover {
    border-color: var(--default-accent);
    color: var(--default-accent);
}

.gradient-angle-row {
    display: flex;
    align-items: center;
    gap: 6px;
    margin-bottom: 6px;
}

.gradient-angle-label {
    font-size: 10px;
    font-weight: 600;
    color: var(--default-text-muted);
    flex-shrink: 0;
}

.gradient-angle-slider {
    flex: 1;
    height: 18px;
    cursor: pointer;
}

.gradient-angle-value {
    font-size: 11px;
    font-weight: 600;
    color: var(--default-text);
    min-width: 30px;
    text-align: right;
}

.gradient-apply-btn {
    width: 100%;
    padding: 5px;
    border: none;
    border-radius: 4px;
    background: var(--default-accent);
    color: white;
    cursor: pointer;
    font-size: 11px;
    font-weight: 600;
    transition: opacity 0.15s ease;
}
.gradient-apply-btn:hover {
    opacity: 0.9;
}

.submenu-item {
    display: flex;
    align-items: center;
    gap: 8px;
    width: 100%;
    padding: 6px 10px;
    border: none;
    background: transparent;
    border-radius: 4px;
    cursor: pointer;
    font-size: 12px;
    color: var(--default-text-primary);
    transition: all 0.15s ease;
    text-align: left;
}

.submenu-item:hover {
    background-color: var(--default-bg-tertiary);
}

.submenu-item.active {
    background-color: var(--default-primary);
    color: #ffffff;
}

.submenu-item i {
    width: 16px;
    text-align: center;
    font-size: 12px;
}

.submenu-item span {
    flex: 1;
    white-space: nowrap;
}

/* Submenu divider */
.submenu-divider {
    height: 1px;
    background-color: var(--default-border-light);
    margin: 6px 0;
}

/* Submenu slider control */
.submenu-slider {
    padding: 8px 10px;
}

.submenu-slider label {
    display: flex;
    align-items: center;
    gap: 6px;
    font-size: 11px;
    color: var(--default-text-muted);
    margin-bottom: 6px;
}

.submenu-slider label i {
    font-size: 12px;
    color: var(--default-text-secondary);
}

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

.slider-row input[type="range"] {
    flex: 1;
    height: 4px;
    -webkit-appearance: none;
    background: var(--default-border);
    border-radius: 2px;
    cursor: pointer;
}

.slider-row input[type="range"]::-webkit-slider-thumb {
    -webkit-appearance: none;
    width: 12px;
    height: 12px;
    background: var(--primary-color);
    border-radius: 50%;
    cursor: pointer;
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.2);
}

.slider-row input[type="range"]::-moz-range-thumb {
    width: 12px;
    height: 12px;
    background: var(--primary-color);
    border-radius: 50%;
    cursor: pointer;
    border: none;
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.2);
}

.slider-value {
    font-size: 11px;
    font-weight: 500;
    color: var(--default-text);
    min-width: 32px;
    text-align: right;
}

.slider-label {
    font-size: 10px;
    color: var(--default-text-muted);
    min-width: 48px;
}

/* Tool submenu with grouped items */
.tool-submenu-wide {
    min-width: 210px;
}

.submenu-tool-group {
    background: rgba(0, 0, 0, 0.02);
    border-radius: 4px;
    margin: 4px 0;
    padding: 2px 0;
}

.submenu-tool-group .submenu-item {
    border-radius: 0;
}

.submenu-slider.nested {
    padding: 4px 8px 8px 8px;
    margin-top: -2px;
}

.submenu-slider.nested .slider-row {
    gap: 6px;
}

.submenu-slider.nested .slider-row input[type="range"] {
    height: 3px;
}

/* Sidebar */
.sidebar {
    min-height: 100%;
    background-color: var(--default-bg-secondary);
    border-right: 1px solid var(--default-border);
}

.tool-sidebar-group {
    border-bottom: 1px solid var(--default-border-light);
    padding: 8px 4px;
    margin-bottom: 2px;
}

.tool-sidebar-group:last-child {
    border-bottom: none;
}

.tool-sidebar-group label {
    font-size: 9px;
    color: var(--default-text-muted);
    text-align: center;
    text-transform: uppercase;
    letter-spacing: 0.3px;
}

/* Color swatch: remove internal padding so color fills the entire box */
.color-swatch {
    display: block;
    width: 50px;
    height: 26px;
    padding: 0;
    border: 2px solid var(--default-border);
    border-radius: 4px;
    overflow: hidden;
    cursor: pointer;
    box-sizing: border-box;
    background: none;
}

.color-swatch::-webkit-color-swatch-wrapper {
    padding: 0;
}

.color-swatch::-webkit-color-swatch {
    border: none;
    border-radius: 0;
}

.color-swatch::-moz-color-swatch {
    border: none;
    border-radius: 0;
}

/* Sidebar number inputs (stroke size, opacity) */
.sidebar-num-input {
    display: block;
    width: 50px;
    height: 26px;
    font-size: 12px;
    line-height: 22px;
    padding: 0;
    text-align: center;
    box-sizing: border-box;
    border: 2px solid var(--default-border);
    border-radius: 4px;
    background: #fff;
    color: #333;
    -moz-appearance: textfield;
}

.sidebar-num-input::-webkit-inner-spin-button,
.sidebar-num-input::-webkit-outer-spin-button {
    -webkit-appearance: none;
    margin: 0;
}

/* Slider popout panels (stroke size, fill opacity) */
.slider-popout-wrapper {
    position: relative;
}

.sidebar-value-btn {
    display: block;
    width: 40px;
    height: 26px;
    font-size: 12px;
    font-weight: 600;
    line-height: 22px;
    padding: 0;
    text-align: center;
    box-sizing: border-box;
    border: 2px solid var(--default-border);
    border-radius: 4px;
    background: #fff;
    color: #333;
    cursor: pointer;
    transition: border-color 0.15s, background-color 0.15s;
}

.sidebar-value-btn:hover {
    border-color: var(--default-accent);
    background-color: #f0f4ff;
}

.sidebar-value-btn.popout-open {
    border-color: var(--default-accent);
    background-color: var(--default-accent-light, #e8eeff);
}

.slider-popout {
    position: absolute;
    left: 100%;
    top: 50%;
    transform: translateY(-50%);
    min-width: 60px;
    background-color: var(--default-bg-elevated);
    border: 1px solid var(--default-border);
    border-radius: 6px;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
    z-index: 1000;
    padding: 8px;
    margin-left: 8px;
    animation: popout-slide-in 0.15s ease-out;
}

@keyframes popout-slide-in {
    from {
        opacity: 0;
        transform: translateY(-50%) translateX(-8px);
    }
    to {
        opacity: 1;
        transform: translateY(-50%) translateX(0);
    }
}

.slider-popout-header {
    font-size: 10px;
    font-weight: 600;
    color: var(--default-text-muted);
    text-align: center;
    padding-bottom: 6px;
    border-bottom: 1px solid var(--default-border-light);
    margin-bottom: 8px;
    white-space: nowrap;
}

.slider-popout-body {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 8px;
}

.vertical-slider {
    writing-mode: vertical-lr;
    direction: rtl;
    width: 28px;
    height: 140px;
    cursor: pointer;
    accent-color: var(--default-accent);
}

/* Firefox vertical slider support */
.vertical-slider[orient="vertical"] {
    appearance: slider-vertical;
    width: 28px;
    height: 140px;
}

/* ============================================
   Canvas Area
   ============================================ */
.canvas-area {
    flex: 1;
    display: flex;
    position: relative;
    overflow: auto;
    background-color: #e9ecef;
    padding: 4px;
    justify-content: center;
    align-items: center;
}

#paintboard-canvas {
    display: block;
    background-color: white;
    cursor: crosshair;
    touch-action: none;
    -webkit-user-select: none;
    -webkit-touch-callout: none;
    -webkit-tap-highlight-color: transparent;
    border: 1px solid var(--default-border);
    border-radius: 2px;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.08);
    opacity: 0;
    transition: opacity 0.2s ease;
}

#paintboard-canvas.ready {
    opacity: 1;
}

/* ============================================
   Modal Dialog
   ============================================ */
.modal-backdrop {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.5);
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 1050;
}

.modal-content {
    background-color: var(--default-bg-secondary);
    border: 1px solid var(--default-border);
    border-radius: 8px;
    max-width: 460px;
    width: 90%;
    max-height: 90vh;
    overflow-y: auto;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.15);
}

.modal-content.modal-wide {
    max-width: 600px;
    width: 95%;
}

.modal-header {
    background-color: var(--default-bg-tertiary);
    padding: 4px 8px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    border-bottom: 1px solid var(--default-border);
    border-radius: 8px 8px 0 0;
}

.modal-header h3 {
    margin: 0;
    color: var(--default-text-primary);
    font-size: 12px;
    font-weight: 600;
}

.close-btn {
    background-color: transparent;
    border: 1px solid var(--default-border);
    color: var(--default-text-secondary);
    font-size: 14px;
    font-weight: bold;
    width: 26px;
    height: 26px;
    line-height: 22px;
    text-align: center;
    cursor: pointer;
    border-radius: 4px;
    transition: all 0.15s ease;
}

.close-btn:hover {
    background-color: var(--default-danger);
    border-color: var(--default-danger);
    color: #ffffff;
}

.modal-body {
    padding: 12px;
    font-size: 11px;
    color: var(--default-text-primary);
}

.modal-body ul {
    list-style-type: none;
    padding: 0;
    margin: 8px 0;
}

.modal-body li {
    padding: 4px 0;
    border-bottom: 1px solid var(--default-border-light);
}

.modal-body li:last-child {
    border-bottom: none;
}

.modal-body li:before {
    content: "✓";
    color: var(--default-success);
    margin-right: 8px;
    font-weight: bold;
}

.modal-actions {
    margin-top: 16px;
    display: flex;
    gap: 8px;
    flex-wrap: wrap;
    justify-content: flex-end;
}

/* ============================================
   General Buttons
   ============================================ */
.btn {
    padding: 4px 16px;
    background-color: var(--default-bg-secondary);
    border: 1px solid var(--default-border);
    border-radius: 4px;
    cursor: pointer;
    text-decoration: none;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 6px;
    font-size: 11px;
    font-family: inherit;
    color: var(--default-text-primary);
    transition: all 0.15s ease;
}

.btn:hover {
    background-color: var(--default-bg-tertiary);
    color: var(--default-text-primary);
}

.btn:active {
    background-color: var(--default-border-light);
}

.btn-primary {
    background-color: var(--default-primary);
    border-color: var(--default-primary);
    color: #ffffff;
}

.btn-primary:hover {
    background-color: var(--default-primary-hover);
    border-color: var(--default-primary-hover);
    color: #ffffff;
}

.btn-secondary {
    background-color: var(--default-secondary);
    border-color: var(--default-secondary);
    color: #ffffff;
}

.btn-secondary:hover {
    background-color: #5c636a;
    border-color: #5c636a;
    color: #ffffff;
}

.btn-outline-secondary {
    background-color: transparent;
    border-color: var(--default-border);
    color: var(--default-text-secondary);
}

.btn-outline-secondary:hover {
    background-color: var(--default-bg-tertiary);
    color: var(--default-text-primary);
}

.btn-outline-danger {
    background-color: transparent;
    border-color: var(--default-danger);
    color: var(--default-danger);
}

.btn-outline-danger:hover {
    background-color: var(--default-danger);
    color: #ffffff;
}

.btn-success {
    background-color: var(--default-success);
    border-color: var(--default-success);
    color: #ffffff;
}

.btn-success:hover {
    background-color: #157347;
    border-color: #157347;
    color: #ffffff;
}

.btn-danger {
    background-color: var(--default-danger);
    border-color: var(--default-danger);
    color: #ffffff;
}

.btn-danger:hover {
    background-color: #bb2d3b;
    border-color: #bb2d3b;
    color: #ffffff;
}

.btn-outline-primary {
    background-color: transparent;
    border-color: var(--default-primary);
    color: var(--default-primary);
}

.btn-outline-primary:hover {
    background-color: var(--default-primary);
    color: #ffffff;
}

.btn-outline-success {
    background-color: transparent;
    border-color: var(--default-success);
    color: var(--default-success);
}

.btn-outline-success:hover {
    background-color: var(--default-success);
    color: #ffffff;
}

/* ============================================
   Form Controls
   ============================================ */
input[type="text"],
input[type="email"],
input[type="password"],
input[type="number"],
select,
textarea {
    background-color: var(--default-bg-secondary);
    border: 1px solid var(--default-border);
    border-radius: 4px;
    padding: 2px 4px;
    font-family: inherit;
    font-size: 11px;
    color: var(--default-text-primary);
    transition: border-color 0.15s ease;
}

input[type="text"]:focus,
input[type="email"]:focus,
input[type="password"]:focus,
input[type="number"]:focus,
select:focus,
textarea:focus {
    outline: none;
    border-color: var(--default-primary);
    box-shadow: 0 0 0 2px rgba(13, 110, 253, 0.15);
}

input[type="text"]::placeholder,
input[type="email"]::placeholder,
input[type="password"]::placeholder,
textarea::placeholder {
    color: var(--default-text-muted);
}

input[type="color"] {
    width: 32px;
    height: 24px;
    border: 1px solid var(--default-border);
    border-radius: 4px;
    cursor: pointer;
    padding: 1px;
    background: var(--default-bg-secondary);
}

input[type="range"] {
    width: 60px;
    accent-color: var(--default-primary);
}

input[type="checkbox"] {
    accent-color: var(--default-primary);
    width: 14px;
    height: 14px;
}

label {
    font-size: 11px;
    font-weight: 500;
    color: var(--default-text-secondary);
}

/* ============================================
   Cards
   ============================================ */
.card {
    background-color: var(--default-bg-card);
    border: 1px solid var(--default-border);
    border-radius: 6px;
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.05);
    overflow: hidden;
}

.card-header {
    background-color: var(--default-bg-tertiary);
    border-bottom: 1px solid var(--default-border);
    padding: 6px 10px;
    font-size: 11px;
    font-weight: 600;
    color: var(--default-text-primary);
}

.card-header.bg-primary {
    background-color: var(--default-primary) !important;
    border-bottom-color: var(--default-primary);
    color: #ffffff !important;
}

.card-header.bg-danger {
    background-color: var(--default-danger) !important;
    border-bottom-color: var(--default-danger);
    color: #ffffff !important;
}

.card-header.bg-warning {
    background-color: var(--default-warning) !important;
    border-bottom-color: var(--default-warning);
    color: #000000 !important;
}

.card-body {
    padding: 10px;
    font-size: 11px;
    color: var(--default-text-primary);
}

.card-title {
    font-size: 12px;
    font-weight: 600;
    margin-bottom: 6px;
    color: var(--default-text-primary);
}

.card.border-danger {
    border-color: var(--default-danger) !important;
}

.card.border-warning {
    border-color: var(--default-warning) !important;
}

/* ============================================
   Alerts
   ============================================ */
.alert {
    border: 1px solid;
    border-radius: 4px;
    padding: 8px 12px;
    font-size: 11px;
    margin-bottom: 12px;
}

.alert-warning {
    background-color: #fff3cd;
    border-color: #ffecb5;
    color: #664d03;
}

.alert-danger {
    background-color: #f8d7da;
    border-color: #f5c2c7;
    color: #842029;
}

.alert-info {
    background-color: #cff4fc;
    border-color: #b6effb;
    color: #055160;
}

.alert-success {
    background-color: #d1e7dd;
    border-color: #badbcc;
    color: #0f5132;
}

.alert-dismissible .btn-close {
    background: transparent;
    border: none;
    color: inherit;
    opacity: 0.6;
    cursor: pointer;
    font-size: 14px;
}

.alert-dismissible .btn-close:hover {
    opacity: 1;
}

/* ============================================
   Info Box
   ============================================ */
.info-box {
    background-color: #e7f3ff;
    border: 1px solid #b6d4fe;
    border-radius: 4px;
    padding: 10px;
    margin: 10px 0;
    font-size: 11px;
}

.info-box-header {
    font-weight: 600;
    color: #084298;
    margin-bottom: 6px;
    display: flex;
    align-items: center;
    gap: 6px;
}

.info-box-header i {
    color: var(--default-primary);
}

/* Save modal info boxes (no inline styles, no pseudo bullets) */
.save-modal-info-box {
    padding: 12px;
    margin: 12px 0;
    border: 1px solid #dfe6ee;
    border-radius: 6px;
}

.info-box-list {
    margin: 0 0 0 18px;
    padding-left: 18px;
    list-style: disc;
}

.info-box-free {
    background: #e8f5e9;
    border-left: 4px solid #4caf50;
}

.info-box-free .info-box-header {
    color: #2e7d32;
}

.info-box-premium {
    background: #fff8e1;
    border-left: 4px solid #ff9800;
}

.info-box-premium .info-box-header {
    color: #f57c00;
}

/* ============================================
   Tables
   ============================================ */
.table {
    font-size: 11px;
    border-collapse: collapse;
    width: 100%;
}

.table th {
    background-color: var(--default-bg-tertiary);
    border: 1px solid var(--default-border);
    padding: 4px 8px;
    font-weight: 600;
    text-align: left;
    color: var(--default-text-primary);
}

.table td {
    border: 1px solid var(--default-border);
    padding: 4px 8px;
    background-color: var(--default-bg-secondary);
    color: var(--default-text-primary);
}

.table-hover tbody tr:hover td {
    background-color: var(--default-bg-tertiary);
}

/* ============================================
   Pagination
   ============================================ */
.pagination {
    gap: 2px;
}

.page-link {
    background-color: var(--default-bg-secondary);
    border: 1px solid var(--default-border);
    border-radius: 4px;
    color: var(--default-text-primary);
    padding: 2px 8px;
    font-size: 11px;
    transition: all 0.15s ease;
}

.page-link:hover {
    background-color: var(--default-bg-tertiary);
    color: var(--default-text-primary);
}

.page-item.active .page-link {
    background-color: var(--default-primary);
    border-color: var(--default-primary);
    color: #ffffff;
}

.page-item.disabled .page-link {
    background-color: var(--default-bg-tertiary);
    border-color: var(--default-border);
    color: var(--default-text-muted);
}

/* ============================================
   Responsive Design
   ============================================ */
@media (max-width: 768px) {
    .navbar {
        padding: 2px 4px !important;
    }

    .navbar-brand {
        padding: 1px 2px !important;
        font-size: 12px !important;
    }

    .navbar-nav .nav-link {
        padding: 2px 6px !important;
        font-size: 10px;
    }

    .nav-user-email .user-email-text {
        display: inline-block;
        max-width: 80px;
        overflow: hidden;
        text-overflow: ellipsis;
        white-space: nowrap;
        vertical-align: middle;
    }

    .toolbar {
        flex-wrap: nowrap;
        overflow-x: auto;
        overflow-y: hidden;
        padding: 4px;
        gap: 4px;
        -webkit-overflow-scrolling: touch;
    }

    .toolbar>div {
        flex-shrink: 0;
        display: flex;
        flex-wrap: nowrap;
    }

    .tool-btn {
        padding: 4px 6px;
        font-size: 10px;
        margin: 0 1px;
        flex-shrink: 0;
    }

    @media (max-width: 480px) {
        .tool-btn span.btn-text {
            display: none;
        }

        .tool-btn {
            padding: 6px 8px;
        }
    }

    .sidebar {
        width: 50px !important;
        min-width: 50px;
    }

    .tool-btn-vertical {
        width: 28px;
        height: 28px;
        font-size: 12px;
    }

    .tool-sidebar-group label {
        font-size: 8px;
    }

    input[type="color"] {
        width: 28px;
        height: 20px;
    }

    .sidebar input[type="number"] {
        width: 40px !important;
        max-width: 100%;
        font-size: 10px !important;
        padding: 2px 2px !important;
    }

    .canvas-area {
        padding: 2px;
    }

    #paintboard-canvas {
        max-width: 100%;
    }
}

@media (max-width: 400px) {
    .tool-btn {
        padding: 4px 4px;
        font-size: 9px;
    }

    .sidebar {
        width: 44px !important;
        min-width: 44px;
    }

    .tool-btn-vertical {
        width: 24px;
        height: 24px;
        font-size: 10px;
    }

    .sidebar input[type="number"] {
        width: 34px !important;
    }
}

/* ============================================
   Error UI
   ============================================ */
#blazor-error-ui {
    background-color: #f8d7da;
    border-top: 1px solid #f5c2c7;
    bottom: 0;
    box-shadow: 0 -2px 6px rgba(0, 0, 0, 0.1);
    display: none;
    left: 0;
    padding: 6px 12px;
    position: fixed;
    width: 100%;
    z-index: 1000;
    font-size: 11px;
    font-family: inherit;
    color: #842029;
}

#blazor-error-ui .dismiss {
    cursor: pointer;
    position: absolute;
    right: 12px;
    top: 6px;
}

.valid.modified:not([type=checkbox]) {
    outline: 2px solid var(--default-success);
    outline-offset: -2px;
}

.invalid {
    outline: 2px solid var(--default-danger);
    outline-offset: -2px;
}

.validation-message {
    color: var(--default-danger);
    font-size: 11px;
    margin-top: 2px;
}

/* ============================================
   Collaborator Cursors
   ============================================ */
.collaborator-cursor {
    position: absolute;
    pointer-events: none;
    z-index: 1000;
    transition: left 0.05s ease-out, top 0.05s ease-out;
}

.collaborator-cursor .cursor-pointer {
    width: 0;
    height: 0;
    border-left: 6px solid transparent;
    border-right: 6px solid transparent;
    border-bottom: 12px solid #ff6b6b;
    transform: rotate(-45deg);
    margin-bottom: -4px;
}

.collaborator-cursor .cursor-label {
    background-color: #ff6b6b;
    color: white;
    padding: 1px 4px;
    border-radius: 3px;
    font-size: 9px;
    font-family: inherit;
    white-space: nowrap;
    margin-left: 10px;
    margin-top: -8px;
}

/* Different colors for different users */
.collaborator-cursor:nth-child(2) .cursor-pointer,
.collaborator-cursor:nth-child(2) .cursor-label {
    border-bottom-color: #4ecdc4;
    background-color: #4ecdc4;
}

.collaborator-cursor:nth-child(3) .cursor-pointer,
.collaborator-cursor:nth-child(3) .cursor-label {
    border-bottom-color: #9b59b6;
    background-color: #9b59b6;
}

.collaborator-cursor:nth-child(4) .cursor-pointer,
.collaborator-cursor:nth-child(4) .cursor-label {
    border-bottom-color: #f39c12;
    background-color: #f39c12;
}

.collaborator-cursor:nth-child(5) .cursor-pointer,
.collaborator-cursor:nth-child(5) .cursor-label {
    border-bottom-color: #3498db;
    background-color: #3498db;
}

/* ============================================
   Container & Typography
   ============================================ */
.container {
    font-family: inherit;
    font-size: 11px;
}

.container h2 {
    font-size: 14px;
    font-weight: 600;
    color: var(--default-text-primary);
    margin-bottom: 12px;
}

/* Form controls */
.form-control {
    background-color: var(--default-bg-secondary);
    border: 1px solid var(--default-border);
    border-radius: 4px;
    padding: 2px 4px;
    font-family: inherit;
    font-size: 11px;
    color: var(--default-text-primary);
    transition: border-color 0.15s ease;
}

.form-control:focus {
    outline: none;
    border-color: var(--default-primary);
    box-shadow: 0 0 0 2px rgba(13, 110, 253, 0.15);
}

.form-control-sm {
    padding: 1px 3px;
    font-size: 11px;
}

.form-select {
    background-color: var(--default-bg-secondary);
    border: 1px solid var(--default-border);
    border-radius: 4px;
    padding: 2px 4px;
    font-family: inherit;
    font-size: 11px;
    color: var(--default-text-primary);
    transition: border-color 0.15s ease;
    height: 22px;
}

.form-select:focus {
    outline: none;
    border-color: var(--default-primary);
    box-shadow: 0 0 0 2px rgba(13, 110, 253, 0.15);
}

.form-label {
    font-size: 11px;
    font-weight: 500;
    margin-bottom: 2px;
    color: var(--default-text-secondary);
}

.form-check-input {
    accent-color: var(--default-primary);
}

.form-check-label {
    font-size: 11px;
    color: var(--default-text-primary);
}

/* Spinners */
.spinner-border {
    width: 16px;
    height: 16px;
    border-width: 2px;
    border-color: var(--default-primary);
    border-right-color: transparent;
}

.spinner-border-sm {
    width: 12px;
    height: 12px;
    border-width: 1px;
}

/* Button groups */
.btn-group {
    gap: 1px;
}

.btn-group .btn {
    border-radius: 0;
}

.btn-group .btn:first-child {
    border-radius: 4px 0 0 4px;
}

.btn-group .btn:last-child {
    border-radius: 0 4px 4px 0;
}

/* Sharing instructions panel */
.sharing-instructions {
    background-color: #e7f3ff;
    border: 1px solid #b6d4fe;
    border-radius: 4px;
    padding: 12px;
    margin: 12px 0;
}

.sharing-instructions h5 {
    font-size: 12px;
    font-weight: 600;
    color: #084298;
    margin-bottom: 8px;
}

.sharing-instructions ol {
    margin: 0;
    padding-left: 20px;
    font-size: 11px;
}

.sharing-instructions li {
    margin-bottom: 4px;
}

.sharing-instructions code {
    background-color: #f8f9fa;
    border: 1px solid var(--default-border);
    border-radius: 3px;
    padding: 1px 4px;
    font-family: "SF Mono", "Monaco", "Courier New", monospace;
    font-size: 10px;
    color: #e83e8c;
}

/* Copy link button */
.copy-link-box {
    display: flex;
    gap: 4px;
    align-items: center;
    margin-top: 8px;
}

.copy-link-box input {
    flex: 1;
    font-family: "SF Mono", "Monaco", "Courier New", monospace;
    font-size: 10px;
}

.copy-link-box .btn {
    padding-top: 0.375rem;
    padding-bottom: 0.375rem;
    line-height: 1.5;
}

/* ============================================
   Toast Notifications
   ============================================ */
.toast-notification {
    position: fixed;
    bottom: 60px;
    right: 20px;
    background-color: var(--default-bg-secondary);
    border: 1px solid var(--default-border);
    border-radius: 6px;
    padding: 8px 16px;
    font-size: 11px;
    font-family: inherit;
    color: var(--default-text-primary);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
    z-index: 2000;
    animation: toast-slide-in 0.2s ease-out;
}

@keyframes toast-slide-in {
    from {
        opacity: 0;
        transform: translateX(50px);
    }

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

/* Toast variants */
.toast-notification.toast-success,
.toast-notification[data-type="success"] {
    background-color: #d1e7dd;
    border-color: #badbcc;
    color: #0f5132;
}

.toast-notification.toast-warning,
.toast-notification[data-type="warning"] {
    background-color: #fff3cd;
    border-color: #ffecb5;
    color: #664d03;
}

.toast-notification.toast-error,
.toast-notification[data-type="error"] {
    background-color: #f8d7da;
    border-color: #f5c2c7;
    color: #842029;
}

.toast-notification.toast-info,
.toast-notification[data-type="info"] {
    background-color: #cff4fc;
    border-color: #b6effb;
    color: #055160;
}

/* Bootstrap toast overrides */
.toast {
    background-color: var(--default-bg-secondary);
    border: 1px solid var(--default-border);
    border-radius: 6px;
    color: var(--default-text-primary);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
}

.toast-header {
    background-color: var(--default-bg-tertiary);
    border-bottom: 1px solid var(--default-border);
    color: var(--default-text-primary);
}

.toast-body {
    color: var(--default-text-primary);
}

.toast-container {
    z-index: 2000;
}

/* ============================================
   Theme Picker Component Styles
   ============================================ */
.theme-picker {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.theme-option {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 8px 12px;
    border: 1px solid var(--default-border);
    border-radius: 6px;
    background-color: var(--default-bg-secondary);
    transition: all 0.15s ease;
    cursor: pointer;
}

.theme-option:hover {
    background-color: var(--default-bg-tertiary);
    border-color: var(--default-primary);
}

.theme-option.active {
    background-color: #e7f3ff;
    border-color: var(--default-primary);
}

.theme-preview {
    width: 48px;
    height: 32px;
    border: 1px solid var(--default-border);
    border-radius: 4px;
    flex-shrink: 0;
}

.theme-details {
    flex: 1;
}

.theme-details strong {
    font-size: 12px;
    color: var(--default-text-primary);
    font-weight: 600;
}

.theme-details p {
    font-size: 10px;
    margin-top: 2px;
    color: var(--default-text-secondary);
}

/* ============================================
   Badges
   ============================================ */
.badge {
    padding: 4px 8px;
    font-size: 11px;
    font-weight: 600;
    border-radius: 4px;
}

.badge.bg-primary {
    background-color: var(--default-primary) !important;
    color: #ffffff !important;
}

.badge.bg-success {
    background-color: var(--default-success) !important;
    color: #ffffff !important;
}

.badge.bg-secondary {
    background-color: var(--default-secondary) !important;
    color: #ffffff !important;
}

.badge.bg-danger {
    background-color: var(--default-danger) !important;
    color: #ffffff !important;
}

.badge.bg-warning {
    background-color: var(--default-warning) !important;
    color: #000000 !important;
}

/* ============================================
   List Groups
   ============================================ */
.list-group {
    border-radius: 4px;
    overflow: hidden;
}

.list-group-item {
    background-color: var(--default-bg-secondary);
    border: 1px solid var(--default-border);
    border-bottom: none;
    padding: 6px 10px;
    color: var(--default-text-primary);
    transition: background-color 0.15s ease;
}

.list-group-item:last-child {
    border-bottom: 1px solid var(--default-border);
}

.list-group-item-action:hover {
    background-color: var(--default-bg-tertiary);
}

.list-group-flush .list-group-item {
    border-left: none;
    border-right: none;
}

.list-group-flush .list-group-item:first-child {
    border-top: none;
}

.list-group-flush .list-group-item:last-child {
    border-bottom: none;
}

/* ============================================
   Text Utilities
   ============================================ */
.text-muted {
    color: var(--default-text-muted) !important;
}

.text-primary {
    color: var(--default-primary) !important;
}

.text-success {
    color: var(--default-success) !important;
}

.text-danger {
    color: var(--default-danger) !important;
}

.text-warning {
    color: #997404 !important;
}

/* Links */
a {
    color: var(--default-primary);
    text-decoration: none;
    transition: color 0.15s ease;
}

a:hover {
    color: var(--default-primary-hover);
    text-decoration: underline;
}

/* Selection */
::selection {
    background-color: rgba(13, 110, 253, 0.2);
    color: var(--default-text-primary);
}

/* Scrollbar */
::-webkit-scrollbar {
    width: 8px;
    height: 8px;
}

::-webkit-scrollbar-track {
    background: var(--default-bg-tertiary);
}

::-webkit-scrollbar-thumb {
    background: var(--default-border);
    border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
    background: #adb5bd;
}

/* Responsive Permissions Table */
.permissions-table th {
    white-space: nowrap;
}

.permissions-table td {
    white-space: nowrap;
}

@media (max-width: 767px) {

    .permissions-table th,
    .permissions-table td {
        font-size: 11px;
        padding: 4px 6px;
    }

    .permissions-table .btn-sm {
        padding: 3px 8px;
        font-size: 11px;
    }

    .permissions-table .form-check-input {
        width: 16px;
        height: 16px;
    }
}

/* ============================================
   Canvas Warning Banners
   ============================================ */
.canvas-banner {
    display: none;
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background: var(--default-danger);
    color: #fff;
    padding: 4px 10px;
    font-weight: 500;
    font-size: 11px;
    text-align: center;
    align-items: center;
    justify-content: center;
}

.canvas-banner-content {
    display: flex;
    align-items: center;
    justify-content: center;
    flex-wrap: nowrap;
    gap: 6px;
    width: 100%;
}

.canvas-banner-text {
    white-space: nowrap;
}

.canvas-banner-btn {
    font-weight: 600;
    white-space: nowrap;
    padding: 2px 6px;
    margin: 0 6px;
    font-size: 11px;
}

.canvas-banner-close {
    font-size: 0.6rem;
}