:root {
    --sys-bg: #0F0F1A;
    --sys-surface: #1C1C28;
    --sys-border: #2D2D3D;

    /* Dynamic tokens injected via JS */
    --c-primary: #3b82f6;
    --c-secondary: #8b5cf6;
    --c-accent: #10b981;
    --c-bg: #0F0F1A;
    --c-surface: #1E1E2D;
    --c-text: #F8FAFC;
    --c-text-muted: #94A3B8;

    --radius: 12px;
    --font: 'Inter', system-ui, sans-serif;

    /* Animation speed for morph */
    --speed: 0.4s;
}

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

body {
    font-family: var(--font);
    background: var(--sys-bg);
    color: #fff;
    overflow: hidden;
    height: 100vh;
}

.text-xs {
    font-size: 0.75rem;
}

.text-sm {
    font-size: 0.875rem;
}

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

.mt-3 {
    margin-top: 1rem;
}

/* Layout */
.layout {
    display: flex;
    height: 100vh;
}

.sidebar {
    width: 320px;
    background: var(--sys-surface);
    border-right: 1px solid var(--sys-border);
    display: flex;
    flex-direction: column;
    padding: 1.5rem;
    overflow-y: auto;
    z-index: 10;
}

.sidebar::-webkit-scrollbar {
    width: 6px;
}

.sidebar::-webkit-scrollbar-thumb {
    background: var(--sys-border);
    border-radius: 3px;
}

.preview-area {
    flex: 1;
    overflow-y: auto;
    padding: 2rem 3rem;
    position: relative;
    /* This background is dynamic based on theme */
    background: var(--c-bg);
    color: var(--c-text);
    transition: background-color var(--speed) ease, color var(--speed) ease;
}

/* Sidebar Elements */
.logo {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    color: #fff;
    margin-bottom: 2rem;
}

.logo h1 {
    font-size: 1.25rem;
    font-weight: 700;
}

.control-group {
    margin-bottom: 2rem;
}

.control-group>label {
    display: block;
    font-size: 0.85rem;
    font-weight: 600;
    text-transform: uppercase;
    color: #94A3B8;
    margin-bottom: 1rem;
    letter-spacing: 0.05em;
}

/* Buttons */
.btn {
    padding: 0.6rem 1rem;
    border-radius: 8px;
    font-family: inherit;
    font-size: 0.9rem;
    font-weight: 600;
    cursor: pointer;
    border: none;
    transition: 0.2s;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
}

.btn-full {
    width: 100%;
}

.btn-primary {
    background: var(--c-primary);
    color: #fff;
    transition: background-color var(--speed) ease;
}

.btn-primary:hover {
    filter: brightness(1.1);
}

.btn-outline {
    background: transparent;
    border: 1px solid var(--sys-border);
    color: #fff;
}

.btn-outline:hover {
    background: rgba(255, 255, 255, 0.05);
}

/* Mood Grid */
.mood-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 0.5rem;
}

.mood-btn {
    background: var(--sys-bg);
    border: 1px solid var(--sys-border);
    color: #94A3B8;
    padding: 0.5rem;
    border-radius: 6px;
    font-size: 0.8rem;
    cursor: pointer;
    transition: 0.2s;
}

.mood-btn:hover {
    border-color: #4A4A6A;
    color: #fff;
}

.mood-btn.active {
    background: var(--c-primary);
    color: #fff;
    border-color: var(--c-primary);
    font-weight: 600;
    transition: background-color var(--speed) ease;
}

/* Sliders */
.slider-wrapper {
    margin-bottom: 1.25rem;
}

.slider-labels {
    display: flex;
    justify-content: space-between;
    margin-bottom: 0.25rem;
    color: #94A3B8;
}

input[type=range] {
    -webkit-appearance: none;
    width: 100%;
    height: 6px;
    background: var(--sys-bg);
    border-radius: 3px;
    outline: none;
    border: 1px solid var(--sys-border);
}

input[type=range]::-webkit-slider-thumb {
    -webkit-appearance: none;
    width: 16px;
    height: 16px;
    border-radius: 50%;
    background: var(--c-primary);
    cursor: pointer;
    transition: background-color var(--speed) ease;
}

/* Psychology Card */
.psychology-card {
    background: var(--sys-bg);
    border: 1px solid var(--sys-border);
    border-radius: 8px;
    padding: 1rem;
    margin-top: auto;
    margin-bottom: 1.5rem;
}

.psychology-card h4 {
    font-size: 0.95rem;
    color: #fff;
    margin-bottom: 0.5rem;
}

.psychology-card p {
    font-size: 0.85rem;
    color: #94A3B8;
    line-height: 1.4;
}

/* Preview Header */
.preview-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 3rem;
}

.theme-toggle {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    background: var(--c-surface);
    padding: 0.3rem;
    border-radius: 8px;
    border: 1px solid var(--sys-border);
    transition: background-color var(--speed);
}

.btn-tab {
    background: transparent;
    color: var(--c-text-muted);
    padding: 0.4rem 1rem;
    border-radius: 6px;
    font-size: 0.85rem;
    font-weight: 500;
}

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

.btn-tab.active {
    background: var(--c-bg);
    color: var(--c-text);
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.1);
}

.accessibility-status {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    background: var(--c-surface);
    padding: 0.5rem 1rem;
    border-radius: 8px;
    border: 1px solid var(--sys-border);
    transition: background-color var(--speed);
}

.a11y-dot {
    width: 10px;
    height: 10px;
    border-radius: 50%;
}

/* Swatches */
.palette-swatches {
    display: flex;
    gap: 1rem;
    margin-bottom: 4rem;
    overflow-x: auto;
    padding-bottom: 1rem;
}

.swatch-wrap {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
    flex: 1;
    min-width: 100px;
}

.swatch {
    height: 80px;
    border-radius: 12px;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.05);
    border: 1px solid rgba(255, 255, 255, 0.05);
    transition: background-color var(--speed) ease;
}

.swatch-lbl {
    font-size: 0.8rem;
    font-weight: 600;
    color: var(--c-text);
    transition: color var(--speed);
}

.hex-val {
    font-weight: 400;
    color: var(--c-text-muted);
    font-size: 0.75rem;
    font-family: monospace;
    text-transform: uppercase;
}

/* UI Preview Panel */
.ui-preview-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 2rem;
    max-width: 900px;
}

.ui-card {
    background: var(--c-surface);
    border-radius: var(--radius);
    padding: 1.5rem;
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.05);
    transition: background-color var(--speed) ease;
}

.ui-card-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 0.5rem;
}

.ui-card h3 {
    font-size: 1.1rem;
    color: var(--c-text);
    transition: color var(--speed) ease;
}

.ui-text-muted {
    font-size: 0.9rem;
    color: var(--c-text-muted);
    margin-bottom: 1.5rem;
    line-height: 1.5;
    transition: color var(--speed) ease;
}

.ui-badge {
    background: var(--c-primary);
    color: #fff;
    font-size: 0.75rem;
    padding: 0.2rem 0.6rem;
    border-radius: 99px;
    font-weight: 600;
    transition: background-color var(--speed) ease;
}

.ui-stats {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1rem;
    margin-bottom: 1.5rem;
}

.ui-stat-box {
    background: var(--c-bg);
    padding: 1rem;
    border-radius: 8px;
    transition: background-color var(--speed) ease;
}

.ui-stat-box h2 {
    font-size: 1.5rem;
    color: var(--c-text);
    margin-top: 0.25rem;
    transition: color var(--speed) ease;
}

.ui-actions {
    display: flex;
    gap: 0.75rem;
}

.ui-actions .btn-outline {
    color: var(--c-primary);
    border-color: var(--c-primary);
}

.ui-actions .btn-outline:hover {
    background: var(--c-primary);
    color: #fff;
}

.ui-form-group {
    margin-bottom: 1.25rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

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

.ui-input {
    background: var(--c-bg);
    border: 1px solid var(--c-border, rgba(150, 150, 150, 0.2));
    color: var(--c-text);
    padding: 0.5rem 0.75rem;
    border-radius: 6px;
    font-family: inherit;
    font-size: 0.9rem;
    width: 60%;
    transition: background-color var(--speed) ease, color var(--speed) ease;
}

.ui-toggle {
    width: 44px;
    height: 24px;
    background: rgba(150, 150, 150, 0.2);
    border-radius: 12px;
    position: relative;
    cursor: pointer;
    transition: background-color var(--speed);
}

.ui-toggle.active {
    background: var(--c-accent);
}

.ui-toggle-knob {
    width: 20px;
    height: 20px;
    background: #fff;
    border-radius: 50%;
    position: absolute;
    top: 2px;
    left: 2px;
    transition: transform 0.2s;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}

.ui-toggle.active .ui-toggle-knob {
    transform: translateX(20px);
}

.ui-alert {
    background: rgba(var(--c-secondary-rgb, 139, 92, 246), 0.1);
    border: 1px solid var(--c-secondary);
    color: var(--c-text);
    padding: 0.75rem 1rem;
    border-radius: 8px;
    display: flex;
    gap: 0.75rem;
    align-items: center;
    font-size: 0.85rem;
    transition: all var(--speed);
}

.ui-alert svg {
    color: var(--c-secondary);
    flex-shrink: 0;
}

/* Modal */
.modal {
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.7);
    backdrop-filter: blur(4px);
    display: none;
    align-items: center;
    justify-content: center;
    z-index: 100;
}

.modal.show {
    display: flex;
}

.modal-content {
    background: var(--sys-surface);
    border: 1px solid var(--sys-border);
    border-radius: 12px;
    width: 100%;
    max-width: 600px;
    overflow: hidden;
}

.modal-header {
    padding: 1.5rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
    border-bottom: 1px solid var(--sys-border);
}

.modal-header h2 {
    font-size: 1.25rem;
}

.btn-close {
    background: transparent;
    border: none;
    font-size: 1.5rem;
    color: #94A3B8;
    cursor: pointer;
}

.btn-close:hover {
    color: #fff;
}

.export-tabs {
    display: flex;
    border-bottom: 1px solid var(--sys-border);
    background: var(--sys-bg);
}

.tab-btn {
    background: transparent;
    border: none;
    padding: 1rem 1.5rem;
    color: #94A3B8;
    font-weight: 500;
    cursor: pointer;
    border-bottom: 2px solid transparent;
}

.tab-btn.active {
    color: var(--c-primary);
    border-bottom-color: var(--c-primary);
}

.export-panels {
    padding: 1.5rem;
}

.export-panel {
    display: none;
}

.export-panel.active {
    display: block;
}

.code-area {
    width: 100%;
    height: 250px;
    background: var(--sys-bg);
    border: 1px solid var(--sys-border);
    border-radius: 6px;
    color: #E2E8F0;
    font-family: monospace;
    font-size: 0.85rem;
    padding: 1rem;
    resize: none;
}

.code-area:focus {
    outline: none;
    border-color: var(--c-primary);
}

.modal-footer {
    padding: 1rem 1.5rem;
    background: var(--sys-bg);
    border-top: 1px solid var(--sys-border);
    display: flex;
    justify-content: flex-end;
}

.toast {
    position: fixed;
    bottom: 2rem;
    left: 50%;
    transform: translateX(-50%) translateY(100px);
    background: #10b981;
    color: #fff;
    padding: 0.75rem 1.5rem;
    border-radius: 99px;
    font-weight: 500;
    box-shadow: 0 10px 15px rgba(0, 0, 0, 0.1);
    opacity: 0;
    transition: all 0.3s;
    z-index: 1000;
}

.toast.show {
    transform: translateX(-50%) translateY(0);
    opacity: 1;
}

@media (max-width: 900px) {
    .layout {
        flex-direction: column;
    }

    .sidebar {
        width: 100%;
        height: auto;
        border-right: none;
        border-bottom: 1px solid var(--sys-border);
    }

    .ui-preview-grid {
        grid-template-columns: 1fr;
    }
}