:root {
    /* Dark Green Palette - matching duzos.github.io */
    --body-colour: #0a0f0d;
    --bg-colour: rgba(16, 28, 22, 0.9);
    --bg-colour-solid: #101c16;
    --bg-secondary: rgba(16, 28, 22, 0.7);
    --border-colour: #4ade80;
    --border-glow: rgba(74, 222, 128, 0.4);
    --hover-colour: #22c55e;
    --text-colour: #e2e8f0;
    --text-muted: #94a3b8;
    --important-colour: #4ade80;
    --card-shadow: rgba(0, 0, 0, 0.3);
    --danger-colour: #ef4444;
    --danger-hover: #dc2626;
    --warning-colour: #f59e0b;
    --info-colour: #3b82f6;

    /* Transitions */
    --transition-fast: 0.2s ease;
    --transition-normal: 0.3s ease;
    --transition-slow: 0.5s ease;
}

* {
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    color: var(--text-colour);
    background-color: var(--body-colour);
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    font-size: 1rem;
    line-height: 1.6;
    margin: 0;
    min-height: 100vh;
    overflow-x: hidden;
}

/* Background gradient */
.background-gradient {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    z-index: -1;
    background:
        radial-gradient(ellipse at 20% 30%, rgba(74, 222, 128, 0.08) 0%, transparent 50%),
        radial-gradient(ellipse at 80% 70%, rgba(34, 197, 94, 0.06) 0%, transparent 50%),
        radial-gradient(ellipse at 50% 50%, rgba(16, 28, 22, 0.9) 0%, var(--body-colour) 100%);
    background-color: var(--body-colour);
    pointer-events: none;
}

/* Links */
a {
    color: var(--important-colour);
    text-decoration: none;
    transition: color var(--transition-fast);
}

a:hover {
    color: var(--hover-colour);
    text-shadow: 0 0 8px var(--border-glow);
}

/* Navigation */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background: rgba(10, 15, 13, 0.85);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border-bottom: 1px solid rgba(74, 222, 128, 0.2);
    padding: 0.75rem 1.5rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
    transition: all var(--transition-normal);
}

.nav-brand {
    font-size: 1.25rem;
    font-weight: bold;
    color: var(--important-colour);
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.nav-brand img {
    height: 32px;
    width: 32px;
}

.nav-links {
    display: flex;
    gap: 1.5rem;
    list-style: none;
    margin: 0;
    padding: 0;
    align-items: center;
}

.nav-links a {
    color: var(--text-colour);
    font-weight: 500;
    padding: 0.5rem;
    transition: color var(--transition-fast);
}

.nav-links a:hover {
    color: var(--important-colour);
}

/* Main Layout */
.app-container {
    display: flex;
    min-height: 100vh;
    padding-top: 60px;
}

/* Sidebar */
.sidebar {
    width: 320px;
    min-width: 320px;
    background: var(--bg-colour);
    backdrop-filter: blur(10px);
    border-right: 1px solid rgba(74, 222, 128, 0.2);
    display: flex;
    flex-direction: column;
    height: calc(100vh - 60px);
    position: sticky;
    top: 60px;
}

.sidebar-header {
    padding: 1.25rem;
    border-bottom: 1px solid rgba(74, 222, 128, 0.2);
}

.sidebar-header h2 {
    color: var(--important-colour);
    font-size: 1.1rem;
    margin: 0 0 0.75rem 0;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.namespace-input {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.namespace-input input {
    width: 100%;
    padding: 0.6rem 0.8rem;
    background: rgba(0, 0, 0, 0.3);
    border: 1px solid rgba(74, 222, 128, 0.3);
    border-radius: 8px;
    color: var(--text-colour);
    font-size: 0.9rem;
    transition: all var(--transition-fast);
}

.namespace-input input:focus {
    outline: none;
    border-color: var(--important-colour);
    box-shadow: 0 0 10px var(--border-glow);
}

.namespace-input input::placeholder {
    color: var(--text-muted);
}

/* Experimental Toggle Switch */
.experimental-toggle {
    margin-top: 0.75rem;
    padding-top: 0.75rem;
    border-top: 1px solid rgba(74, 222, 128, 0.15);
}

.toggle-switch {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    cursor: pointer;
    user-select: none;
}

.toggle-switch input {
    display: none;
}

.toggle-slider {
    position: relative;
    width: 44px;
    height: 24px;
    background: rgba(0, 0, 0, 0.4);
    border: 1px solid rgba(74, 222, 128, 0.3);
    border-radius: 24px;
    transition: all var(--transition-normal);
    flex-shrink: 0;
}

.toggle-slider::before {
    content: '';
    position: absolute;
    top: 3px;
    left: 3px;
    width: 16px;
    height: 16px;
    background: var(--text-muted);
    border-radius: 50%;
    transition: all var(--transition-normal);
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.3);
}

.toggle-switch input:checked + .toggle-slider {
    background: rgba(74, 222, 128, 0.2);
    border-color: var(--important-colour);
    box-shadow: 0 0 10px var(--border-glow);
}

.toggle-switch input:checked + .toggle-slider::before {
    transform: translateX(20px);
    background: var(--important-colour);
    box-shadow: 0 0 8px var(--border-glow), 0 2px 4px rgba(0, 0, 0, 0.3);
}

.toggle-switch:hover .toggle-slider {
    border-color: var(--important-colour);
}

.toggle-label {
    font-size: 0.85rem;
    color: var(--text-muted);
    transition: color var(--transition-fast);
}

.toggle-switch:hover .toggle-label {
    color: var(--text-colour);
}

.toggle-switch input:checked ~ .toggle-label {
    color: var(--important-colour);
}

/* Help Icon with Tooltip */
.help-icon {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 16px;
    height: 16px;
    margin-left: 0.25rem;
    color: var(--text-muted);
    cursor: help;
    transition: color var(--transition-fast);
    vertical-align: middle;
    position: relative;
}

.help-icon:hover {
    color: var(--important-colour);
}

.help-icon i {
    font-size: 0.75rem;
}

/* Tooltip container - created by JavaScript */
.tooltip-popup {
    position: fixed;
    padding: 0.6rem 0.8rem;
    background: rgba(10, 10, 20, 0.98);
    border: 1px solid var(--border-colour);
    border-radius: 8px;
    color: var(--text-colour);
    font-size: 0.75rem;
    font-weight: normal;
    line-height: 1.4;
    white-space: normal;
    width: 240px;
    text-align: left;
    z-index: 99999;
    pointer-events: none;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.6), 0 0 1px rgba(74, 222, 128, 0.5);
    animation: tooltipFadeIn 0.15s ease-out;
}

@keyframes tooltipFadeIn {
    from {
        opacity: 0;
        transform: translateY(4px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* Hide the CSS-only tooltip since we're using JS */
.help-icon[data-tooltip]::after {
    display: none;
}

/* Pack Note Warning */
.pack-note {
    display: flex;
    align-items: flex-start;
    gap: 0.6rem;
    padding: 0.75rem;
    margin-bottom: 0.75rem;
    background: rgba(251, 191, 36, 0.1);
    border: 1px solid rgba(251, 191, 36, 0.3);
    border-radius: 8px;
    font-size: 0.8rem;
    color: #fbbf24;
    line-height: 1.4;
}

.pack-note i {
    flex-shrink: 0;
    margin-top: 0.1rem;
}

.pack-note strong {
    color: #fcd34d;
}

/* Namespace Input Label - Bigger and Bolder */
.namespace-input label {
    display: flex;
    align-items: center;
    font-size: 1rem;
    font-weight: 600;
    color: var(--text-colour);
    margin-bottom: 0.5rem;
}

/* Collapsible Settings Dropdown */
.settings-dropdown {
    margin-top: 0.75rem;
    border: 1px solid rgba(74, 222, 128, 0.15);
    border-radius: 8px;
    overflow: hidden;
}

.settings-dropdown summary {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.65rem 0.75rem;
    background: rgba(0, 0, 0, 0.2);
    color: var(--text-muted);
    font-size: 0.85rem;
    cursor: pointer;
    user-select: none;
    transition: all var(--transition-fast);
    list-style: none;
}

.settings-dropdown summary::-webkit-details-marker {
    display: none;
}

.settings-dropdown summary:hover {
    background: rgba(0, 0, 0, 0.3);
    color: var(--text-colour);
}

.settings-dropdown[open] summary {
    border-bottom: 1px solid rgba(74, 222, 128, 0.15);
}

.settings-dropdown .dropdown-arrow {
    margin-left: auto;
    font-size: 0.7rem;
    transition: transform var(--transition-fast);
}

.settings-dropdown[open] .dropdown-arrow {
    transform: rotate(180deg);
}

.settings-content {
    padding: 0.75rem;
    background: rgba(0, 0, 0, 0.1);
}

.settings-content .experimental-toggle {
    margin-top: 0;
    padding-top: 0;
    border-top: none;
}

/* GitHub Branch Setting */
.github-branch-setting {
    margin-top: 0.75rem;
    padding-top: 0.75rem;
    border-top: 1px solid rgba(74, 222, 128, 0.15);
}

.github-branch-setting label {
    display: flex;
    align-items: center;
    font-size: 0.8rem;
    color: var(--text-muted);
    margin-bottom: 0.4rem;
}

.github-branch-setting label i.fa-github {
    margin-right: 0.35rem;
}

.github-branch-setting select {
    width: 100%;
    padding: 0.5rem 0.75rem;
    background: rgba(0, 0, 0, 0.3);
    border: 1px solid rgba(74, 222, 128, 0.2);
    border-radius: 6px;
    color: var(--text-colour);
    font-size: 0.85rem;
    font-family: 'SF Mono', Monaco, 'Cascadia Code', monospace;
    transition: all var(--transition-normal);
    cursor: pointer;
    appearance: none;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='%234ade80'%3E%3Cpath d='M7 10l5 5 5-5z'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 0.5rem center;
    background-size: 1.2rem;
    padding-right: 2rem;
}

.github-branch-setting select:focus {
    outline: none;
    border-color: var(--important-colour);
    box-shadow: 0 0 8px var(--border-glow);
}

.github-branch-setting select option {
    background: var(--bg-colour);
    color: var(--text-colour);
    padding: 0.5rem;
}

.branch-loading {
    display: flex;
    align-items: center;
    gap: 0.4rem;
    font-size: 0.75rem;
    color: var(--text-muted);
    margin-top: 0.4rem;
}

.branch-loading.hidden {
    display: none;
}

/* Stack Section */
.stack-section {
    flex: 1;
    overflow-y: auto;
    padding: 1rem;
}

.stack-section h3 {
    color: var(--text-colour);
    font-size: 0.9rem;
    margin: 0 0 0.75rem 0;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.stack-count {
    background: var(--important-colour);
    color: var(--body-colour);
    padding: 0.15rem 0.5rem;
    border-radius: 10px;
    font-size: 0.75rem;
    font-weight: bold;
}

#stackItems {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.empty-stack {
    text-align: center;
    color: var(--text-muted);
    padding: 2rem 1rem;
    font-size: 0.9rem;
}

.stack-item {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0.75rem;
    background: rgba(0, 0, 0, 0.2);
    border: 1px solid rgba(74, 222, 128, 0.2);
    border-radius: 10px;
    transition: all var(--transition-fast);
}

.stack-item:hover {
    border-color: var(--important-colour);
    background: rgba(74, 222, 128, 0.05);
}

.stack-item-icon {
    width: 36px;
    height: 36px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(74, 222, 128, 0.1);
    border-radius: 8px;
    color: var(--important-colour);
}

.stack-item-info {
    flex: 1;
    min-width: 0;
}

.stack-item-type {
    display: block;
    font-size: 0.75rem;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.stack-item-id {
    display: block;
    font-size: 0.9rem;
    color: var(--text-colour);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.stack-item-actions {
    display: flex;
    gap: 0.25rem;
}

/* Sidebar Footer */
.sidebar-footer {
    padding: 1rem;
    border-top: 1px solid rgba(74, 222, 128, 0.2);
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.sidebar-footer .btn-row {
    display: flex;
    gap: 0.5rem;
}

.sidebar-footer .btn-row .btn {
    flex: 1;
    padding: 0.5rem 0.75rem;
    font-size: 0.9rem;
}

/* Main Content */
.main-content {
    flex: 1;
    padding: 1.5rem 2rem;
    min-width: 0;
}

/* Tool Selector */
.tool-selector {
    margin-bottom: 1.25rem;
}

.tool-selector label {
    display: block;
    font-size: 0.85rem;
    color: var(--text-muted);
    margin-bottom: 0.5rem;
}

.tool-selector select {
    width: 100%;
    padding: 0.75rem 1rem;
    background: var(--bg-colour);
    border: 2px solid rgba(74, 222, 128, 0.3);
    border-radius: 10px;
    color: var(--text-colour);
    font-size: 1rem;
    cursor: pointer;
    transition: all var(--transition-fast);
}

.tool-selector select:focus {
    outline: none;
    border-color: var(--important-colour);
    box-shadow: 0 0 15px var(--border-glow);
}

.tool-selector select option {
    background: var(--bg-colour-solid);
    color: var(--text-colour);
}

/* Workspace */
#workspace {
    background: var(--bg-colour);
    border: 1px solid rgba(74, 222, 128, 0.2);
    border-radius: 16px;
    padding: 1.5rem;
    min-height: 400px;
}

.empty-state {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    height: 300px;
    text-align: center;
    color: var(--text-muted);
}

.empty-state i {
    font-size: 4rem;
    margin-bottom: 1rem;
    opacity: 0.3;
}

.empty-state h3 {
    color: var(--text-colour);
    margin: 0 0 0.5rem 0;
}

.empty-state p {
    margin: 0;
    font-size: 0.9rem;
}

/* Tool Header */
.tool-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 0.5rem;
}

.tool-header h2 {
    color: var(--important-colour);
    margin: 0;
    font-size: 1.5rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.wiki-link {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.9rem;
    padding: 0.5rem 1rem;
    background: rgba(74, 222, 128, 0.1);
    border-radius: 8px;
    transition: all var(--transition-fast);
}

.wiki-link:hover {
    background: rgba(74, 222, 128, 0.2);
}

.tool-description {
    color: var(--text-muted);
    margin: 0 0 1.5rem 0;
    font-size: 0.9rem;
}

/* Form Styles */
.tool-form {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.form-group {
    display: flex;
    flex-direction: column;
    gap: 0.4rem;
}

.form-group label {
    font-size: 0.9rem;
    color: var(--text-colour);
    font-weight: 500;
}

.form-group .required {
    color: var(--danger-colour);
}

.form-group input[type="text"],
.form-group input[type="number"],
.form-group input[type="file"],
.form-group select,
.form-group textarea {
    padding: 0.7rem 1rem;
    background: rgba(0, 0, 0, 0.3);
    border: 1px solid rgba(74, 222, 128, 0.3);
    border-radius: 8px;
    color: var(--text-colour);
    font-size: 0.95rem;
    font-family: inherit;
    transition: all var(--transition-fast);
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--important-colour);
    box-shadow: 0 0 10px var(--border-glow);
}

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

.form-group select option {
    background: var(--bg-colour-solid);
}

.form-group textarea {
    min-height: 100px;
    resize: vertical;
}

.form-group input[type="file"] {
    cursor: pointer;
}

.form-group input[type="file"]::file-selector-button {
    padding: 0.5rem 1rem;
    margin-right: 1rem;
    background: rgba(74, 222, 128, 0.2);
    border: 1px solid var(--border-colour);
    border-radius: 6px;
    color: var(--text-colour);
    cursor: pointer;
    transition: all var(--transition-fast);
}

.form-group input[type="file"]::file-selector-button:hover {
    background: rgba(74, 222, 128, 0.3);
}

.file-hint {
    font-size: 0.8rem;
    color: var(--text-muted);
}

.file-existing {
    font-size: 0.8rem;
    color: var(--important-colour);
    display: flex;
    align-items: center;
    gap: 0.4rem;
}

.file-existing i {
    color: var(--important-colour);
}

.form-group.checkbox-group {
    flex-direction: row;
    align-items: center;
}

.form-group.checkbox-group label {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    cursor: pointer;
}

.form-group.checkbox-group input[type="checkbox"] {
    width: 18px;
    height: 18px;
    accent-color: var(--important-colour);
    cursor: pointer;
}

.hidden {
    display: none !important;
}

/* Form Sections */
.form-section {
    background: rgba(0, 0, 0, 0.2);
    border: 1px solid rgba(74, 222, 128, 0.15);
    border-radius: 12px;
    padding: 1.25rem;
    margin: 0.5rem 0;
}

.form-section h3 {
    color: var(--important-colour);
    font-size: 1rem;
    margin: 0 0 1rem 0;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.section-hint {
    font-size: 0.85rem;
    color: var(--text-muted);
    margin: -0.5rem 0 1rem 0;
}

.form-divider {
    text-align: center;
    color: var(--text-muted);
    font-size: 0.85rem;
    margin: 1rem 0;
    position: relative;
}

.form-divider::before,
.form-divider::after {
    content: '';
    position: absolute;
    top: 50%;
    width: 40%;
    height: 1px;
    background: rgba(74, 222, 128, 0.2);
}

.form-divider::before {
    left: 0;
}

.form-divider::after {
    right: 0;
}

.form-row {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 1rem;
}

.vector-input {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 0.5rem;
}

.vector-input input {
    text-align: center;
    min-width: 60px;
}

/* Form Actions */
.form-actions {
    display: flex;
    gap: 1rem;
    margin-top: 1rem;
    padding-top: 1rem;
    border-top: 1px solid rgba(74, 222, 128, 0.2);
}

/* Buttons */
.btn {
    appearance: none;
    background: var(--bg-colour);
    border: 2px solid var(--border-colour);
    border-radius: 10px;
    box-shadow: 0 4px 15px var(--card-shadow);
    color: var(--text-colour);
    cursor: pointer;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    font-family: inherit;
    font-size: 1rem;
    font-weight: 600;
    line-height: 1.5;
    padding: 0.7rem 1.5rem;
    transition: all var(--transition-normal);
    user-select: none;
}

.btn:hover {
    background: rgba(74, 222, 128, 0.1);
    border-color: var(--hover-colour);
    box-shadow: 0 6px 20px var(--card-shadow), 0 0 15px var(--border-glow);
    transform: translateY(-2px);
}

.btn:active {
    transform: translateY(0);
}

.btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
    transform: none;
}

.btn-primary {
    background: rgba(74, 222, 128, 0.2);
}

.btn-primary:hover {
    background: rgba(74, 222, 128, 0.3);
}

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

.btn-secondary:hover {
    border-color: var(--text-colour);
    background: rgba(255, 255, 255, 0.05);
}

.btn-danger {
    border-color: var(--danger-colour);
    color: var(--danger-colour);
}

.btn-danger:hover {
    background: rgba(239, 68, 68, 0.1);
    border-color: var(--danger-hover);
}

.btn-small {
    padding: 0.4rem 0.8rem;
    font-size: 0.85rem;
}

.btn-icon {
    width: 32px;
    height: 32px;
    padding: 0;
    border-radius: 8px;
    background: transparent;
    border: 1px solid rgba(74, 222, 128, 0.3);
    color: var(--text-muted);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all var(--transition-fast);
}

.btn-icon:hover {
    border-color: var(--important-colour);
    color: var(--important-colour);
    background: rgba(74, 222, 128, 0.1);
}

.btn-icon.btn-danger:hover {
    border-color: var(--danger-colour);
    color: var(--danger-colour);
    background: rgba(239, 68, 68, 0.1);
}

/* Input/Potion Items (for dynamic lists) */
.input-item,
.potion-item {
    display: grid;
    grid-template-columns: 1fr 80px 80px 40px;
    gap: 0.5rem;
    align-items: center;
    margin-bottom: 0.5rem;
}

.input-item input,
.potion-item input {
    padding: 0.6rem 0.8rem;
    background: rgba(0, 0, 0, 0.3);
    border: 1px solid rgba(74, 222, 128, 0.3);
    border-radius: 6px;
    color: var(--text-colour);
    font-size: 0.9rem;
}

.input-item input:focus,
.potion-item input:focus {
    outline: none;
    border-color: var(--important-colour);
}

/* Controls Preview */
.controls-preview,
.animations-preview {
    background: rgba(0, 0, 0, 0.2);
    border: 1px solid rgba(74, 222, 128, 0.2);
    border-radius: 12px;
    padding: 1rem;
    margin-top: 1rem;
}

.controls-preview h3,
.animations-preview h3 {
    color: var(--important-colour);
    font-size: 1rem;
    margin: 0 0 0.75rem 0;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.control-item,
.animation-item {
    display: flex;
    align-items: center;
    gap: 1rem;
    padding: 0.5rem;
    background: rgba(0, 0, 0, 0.2);
    border-radius: 6px;
    margin-bottom: 0.5rem;
    font-size: 0.9rem;
}

.control-id {
    color: var(--important-colour);
    font-weight: 500;
}

.control-group {
    color: var(--text-muted);
}

.control-anim {
    margin-left: auto;
    color: var(--info-colour);
    font-size: 0.8rem;
}

.anim-type {
    color: var(--text-muted);
    text-transform: uppercase;
    font-size: 0.8rem;
    min-width: 60px;
}

.anim-name {
    color: var(--important-colour);
}

/* Toast Notifications */
.toast {
    position: fixed;
    bottom: 2rem;
    right: 2rem;
    padding: 1rem 1.5rem;
    background: var(--bg-colour-solid);
    border: 1px solid var(--border-colour);
    border-radius: 10px;
    color: var(--text-colour);
    font-size: 0.95rem;
    box-shadow: 0 4px 20px var(--card-shadow);
    transform: translateY(100px);
    opacity: 0;
    transition: all var(--transition-normal);
    z-index: 2000;
}

.toast.show {
    transform: translateY(0);
    opacity: 1;
}

.toast-success {
    border-color: var(--important-colour);
}

.toast-error {
    border-color: var(--danger-colour);
}

.toast-warning {
    border-color: var(--warning-colour);
}

.toast-info {
    border-color: var(--info-colour);
}

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

::-webkit-scrollbar-track {
    background: rgba(0, 0, 0, 0.2);
}

::-webkit-scrollbar-thumb {
    background: rgba(74, 222, 128, 0.3);
    border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
    background: rgba(74, 222, 128, 0.5);
}

/* Responsive */
@media (max-width: 900px) {
    .app-container {
        flex-direction: column;
    }

    .sidebar {
        width: 100%;
        min-width: 100%;
        height: auto;
        position: relative;
        top: 0;
        border-right: none;
        border-bottom: 1px solid rgba(74, 222, 128, 0.2);
    }

    .stack-section {
        max-height: 200px;
    }

    .main-content {
        padding: 1rem;
    }

    .form-row {
        grid-template-columns: 1fr;
    }

    .tool-header {
        flex-direction: column;
        align-items: flex-start;
        gap: 0.75rem;
    }

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

    .nav-links {
        display: none;
    }
}

/* Hero section for landing feel */
.hero-banner {
    text-align: center;
    padding: 1.5rem 2rem;
    margin-bottom: 1rem;
    background: linear-gradient(135deg, rgba(74, 222, 128, 0.1) 0%, transparent 100%);
    border-radius: 16px;
    border: 1px solid rgba(74, 222, 128, 0.2);
}

.hero-banner h1 {
    font-size: 2rem;
    color: var(--important-colour);
    margin: 0 0 0.5rem 0;
    text-shadow: 0 0 20px var(--border-glow);
}

.hero-banner p {
    color: var(--text-muted);
    margin: 0;
    font-size: 1rem;
}

/* Model Preview Styles */
.form-with-preview {
    display: grid;
    grid-template-columns: 1fr 350px;
    gap: 1.5rem;
    align-items: start;
}

.model-preview-panel {
    position: sticky;
    top: 1rem;
}

.model-preview-panel h3 {
    margin: 0 0 0.75rem 0;
    color: var(--important-colour);
    font-size: 1rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.model-preview-container {
    background: linear-gradient(135deg, #1a1a2e 0%, #16213e 100%);
    border: 1px solid var(--border-colour);
    border-radius: 8px;
    height: 350px;
    overflow: hidden;
    position: relative;
}

.model-preview-container canvas {
    display: block;
}

.preview-controls {
    margin-top: 0.75rem;
    display: flex;
    gap: 0.5rem;
    flex-wrap: wrap;
    align-items: center;
}

.preview-controls .btn {
    padding: 0.4rem 0.75rem;
    font-size: 0.8rem;
}

.display-transform-control {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    flex: 1 1 auto;
    min-width: 140px;
}

.display-transform-control label {
    font-size: 0.8rem;
    color: var(--text-muted);
    white-space: nowrap;
}

.display-transform-control select {
    flex: 1;
    padding: 0.4rem 0.6rem;
    font-size: 0.8rem;
    background-color: var(--bg-secondary);
    border: 1px solid var(--border-colour);
    border-radius: var(--border-radius);
    color: var(--text-colour);
    cursor: pointer;
    min-width: 80px;
}

.display-transform-control select:hover {
    border-color: var(--important-colour);
}

.display-transform-control select:focus {
    outline: none;
    border-color: var(--important-colour);
    box-shadow: 0 0 0 2px rgba(74, 222, 128, 0.2);
}

.preview-loading,
.preview-message {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    color: var(--text-muted);
    font-size: 0.9rem;
    text-align: center;
    padding: 1rem;
}

.preview-loading i {
    font-size: 1.5rem;
    margin-bottom: 0.5rem;
    display: block;
    color: var(--important-colour);
}

.preview-message i {
    font-size: 2rem;
    margin-bottom: 0.5rem;
    display: block;
    opacity: 0.5;
}

/* Responsive preview */
@media (max-width: 1200px) {
    .form-with-preview {
        grid-template-columns: 1fr;
    }

    .model-preview-panel {
        position: relative;
        top: 0;
        order: -1;
    }

    .model-preview-container {
        height: 250px;
    }
}

.form-content {
    min-width: 0;
}

/* Export Confirmation Modal */
.modal-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.8);
    backdrop-filter: blur(8px);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 9999;
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.3s ease, visibility 0.3s ease;
}

.modal-overlay.active {
    opacity: 1;
    visibility: visible;
}

.modal-container {
    background: linear-gradient(135deg, var(--bg-colour) 0%, rgba(26, 26, 46, 0.98) 100%);
    border: 1px solid var(--border-colour);
    border-radius: 20px;
    padding: 2rem;
    max-width: 500px;
    width: 90%;
    text-align: center;
    transform: scale(0.9) translateY(20px);
    transition: transform 0.3s ease;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.5), 0 0 40px var(--border-glow);
}

.modal-overlay.active .modal-container {
    transform: scale(1) translateY(0);
}

.modal-icon {
    width: 80px;
    height: 80px;
    margin: 0 auto 1.5rem;
    background: rgba(251, 191, 36, 0.15);
    border: 2px solid rgba(251, 191, 36, 0.4);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    animation: pulse-warning 2s ease-in-out infinite;
}

@keyframes pulse-warning {
    0%, 100% {
        box-shadow: 0 0 0 0 rgba(251, 191, 36, 0.4);
    }
    50% {
        box-shadow: 0 0 20px 10px rgba(251, 191, 36, 0.1);
    }
}

.modal-icon i {
    font-size: 2.5rem;
    color: #fbbf24;
}

.modal-title {
    color: var(--text-colour);
    font-size: 1.5rem;
    margin: 0 0 1rem;
    font-weight: 600;
}

.modal-content {
    margin-bottom: 1.5rem;
}

.modal-content > p {
    color: var(--text-muted);
    margin: 0 0 1rem;
    font-size: 0.95rem;
}

.modal-content strong {
    color: var(--text-colour);
}

.modal-warning {
    display: flex;
    align-items: flex-start;
    gap: 1rem;
    background: rgba(74, 222, 128, 0.08);
    border: 1px solid rgba(74, 222, 128, 0.25);
    border-radius: 12px;
    padding: 1.25rem;
    text-align: left;
}

.modal-warning > i {
    font-size: 1.5rem;
    color: var(--important-colour);
    flex-shrink: 0;
    margin-top: 0.1rem;
}

.modal-warning p {
    margin: 0 0 0.75rem;
    color: var(--text-colour);
    font-size: 0.9rem;
}

.modal-warning ul {
    list-style: none;
    padding: 0;
    margin: 0 0 0.75rem;
}

.modal-warning li {
    display: flex;
    align-items: center;
    gap: 0.6rem;
    padding: 0.4rem 0;
    color: var(--text-muted);
    font-size: 0.85rem;
}

.modal-warning li i {
    color: var(--important-colour);
    width: 18px;
    text-align: center;
}

.modal-warning li strong {
    color: var(--text-colour);
}

.modal-note {
    font-size: 0.8rem !important;
    color: var(--important-colour) !important;
    font-style: italic;
    margin-bottom: 0 !important;
}

.modal-actions {
    display: flex;
    gap: 1rem;
    justify-content: center;
}

.modal-actions .btn {
    min-width: 140px;
    padding: 0.75rem 1.5rem;
    font-size: 0.95rem;
}

@media (max-width: 500px) {
    .modal-container {
        padding: 1.5rem;
    }

    .modal-icon {
        width: 60px;
        height: 60px;
    }

    .modal-icon i {
        font-size: 1.8rem;
    }

    .modal-title {
        font-size: 1.25rem;
    }

    .modal-actions {
        flex-direction: column;
    }

    .modal-actions .btn {
        width: 100%;
    }
}