/* --- PLAYGROUND LAYOUT --- */
.playground-layout {
    display: grid;
    grid-template-columns: 310px 1fr;
    gap: 20px;
    height: calc(100vh - 84px);
    margin-top: 8px;
    overflow: hidden;
}

.playground-sidebar {
    display: flex;
    flex-direction: column;
    gap: 16px;
    overflow-y: auto;
    padding-bottom: 24px;
}

/* --- SETTINGS CARD PATTERNS --- */
.settings-card {
    background: var(--md-sys-color-surface-container-low);
    border-radius: var(--md-sys-shape-corner-large);
    padding: 20px;
    border: 1px solid var(--md-sys-color-outline-variant);
}

.control-row {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 12px;
    margin-bottom: 24px;
}
.control-row:last-child { margin-bottom: 0; }

.control-row label {
    width: 100%;
    text-align: center;
    font: var(--md-sys-typescale-label-large);
    color: var(--md-sys-color-on-surface-variant);
    text-transform: uppercase;
    letter-spacing: 0.1em;
}

.toggle-group {
    display: inline-flex; 
    background: var(--md-sys-color-surface-container-highest);
    border-radius: 99px; 
    padding: 4px; 
    gap: 4px;
}

.toggle-btn {
    padding: 8px 16px; 
    border-radius: 99px; 
    cursor: pointer;
    font-size: 14px; 
    font-weight: 500; 
    border: none; 
    background: transparent;
    color: var(--md-sys-color-on-surface-variant); 
    transition: 0.2s;
    display: flex; 
    align-items: center; 
    gap: 8px;
}
.toggle-btn:hover { background: rgba(0,0,0,0.05); color: var(--md-sys-color-on-surface); }
.toggle-btn.active {
    background: var(--md-sys-color-primary); 
    color: var(--md-sys-color-on-primary);
    box-shadow: var(--md-sys-elevation-1);
}

.color-grid { 
    display: flex; 
    gap: 12px; 
    flex-wrap: wrap; 
    justify-content: center;
}
.color-option {
    width: 40px; height: 40px; border-radius: 50%; cursor: pointer;
    display: flex; align-items: center; justify-content: center;
    border: 2px solid transparent; transition: all 0.2s ease;
}
.color-option:hover { transform: scale(1.1); box-shadow: var(--md-sys-elevation-1); }
.color-option.active { border-color: var(--md-sys-color-on-surface); transform: scale(1.15); }
.color-option .material-symbols-rounded { 
    color: #fff; font-size: 20px; opacity: 0; transform: scale(0.5); transition: 0.2s;
}
.color-option.active .material-symbols-rounded { opacity: 1; transform: scale(1); }

.playground-content {
    background: var(--md-sys-color-surface);
    border-radius: var(--md-sys-shape-corner-large);
    padding: 0;
    border: 1px solid var(--md-sys-color-outline-variant);
    display: flex;
    flex-direction: column;
    overflow: hidden;
}

.tab-content-wrapper {
    flex: 1;
    overflow-y: auto;
}

/* --- SIDEBAR ACTIVE PALETTE --- */
.sidebar-palette-section {
    margin-top: 0;
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.toggle-btn .material-symbols-rounded { font-size: 18px; }
.sidebar-divider {
    width: 100%;
    height: 1px;
    background: var(--md-sys-color-outline-variant);
    margin: 8px 0;
    opacity: 0.5;
}
.sidebar-section-label {
    font: var(--md-sys-typescale-label-medium);
    color: var(--md-sys-color-on-surface-variant);
    text-transform: uppercase;
    letter-spacing: 0.1em;
    padding: 0 16px;
    text-align: center;
    width: 100%;
}
.sidebar-color-grid {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    padding: 0 16px;
    justify-content: center;
}
.sidebar-color-circle {
    width: 28px;
    aspect-ratio: 1 / 1;
    border-radius: 50%;
    cursor: pointer;
    border: 1px solid var(--md-sys-color-outline-variant);
    transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
    position: relative;
}
.sidebar-color-circle:hover { 
    transform: scale(1.2); 
    z-index: 2;
    box-shadow: var(--md-sys-elevation-2); 
    border-color: var(--md-sys-color-primary);
}

/* --- MATRIX SEARCH --- */
.matrix-search-container {
    position: sticky;
    top: 0;
    background: var(--md-sys-color-surface);
    padding: 8px 16px;
    border: 1px solid var(--md-sys-color-outline-variant);
    border-radius: 99px;
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 32px;
    z-index: 5;
    transition: 0.2s;
}
.matrix-search-container:focus-within {
    border-color: var(--md-sys-color-primary);
    box-shadow: 0 0 0 1px var(--md-sys-color-primary);
}
.matrix-search-container span { color: var(--md-sys-color-on-surface-variant); }
.matrix-search-container input {
    border: none;
    background: transparent;
    flex: 1;
    height: 32px;
    font: var(--md-sys-typescale-body-large);
    color: var(--md-sys-color-on-surface);
    outline: none;
}

/* --- MATRIX CONTENT --- */
.matrix-header {
    font: var(--md-sys-typescale-headline-small);
    color: var(--md-sys-color-on-surface-variant);
    margin-bottom: 8px;
    padding-bottom: 12px;
    border-bottom: 1px solid var(--md-sys-color-outline-variant);
}
.matrix-subheader {
    font: var(--md-sys-typescale-body-medium);
    color: var(--md-sys-color-on-surface-variant);
    margin-bottom: 24px;
}

/* --- TOKEN CARDS --- */
.token-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(140px, 1fr));
    gap: 12px;
}
.token-card {
    background: var(--md-sys-color-surface-container-lowest);
    border: 1px solid var(--md-sys-color-outline-variant);
    border-radius: 20px;
    overflow: hidden;
    display: flex;
    flex-direction: column;
    transition: all 0.3s cubic-bezier(0.175, 0.885, 0.32, 1);
}
.token-card:hover { 
    transform: translateY(-4px); 
    box-shadow: var(--md-sys-elevation-2); 
    border-color: var(--md-sys-color-primary); 
    background: var(--md-sys-color-surface-container-low);
}

.token-swatch {
    aspect-ratio: 16 / 10;
    position: relative;
    cursor: pointer;
    border-bottom: 1px solid var(--md-sys-color-outline-variant);
    transition: 0.2s;
}
.token-swatch:hover { opacity: 0.9; }
.token-swatch::after {
    content: ""; position: absolute; inset: 0;
    border: 1px solid rgba(0,0,0,0.05);
    pointer-events: none;
    border-radius: 20px 20px 0 0;
}

.token-badge {
    position: absolute; top: 8px; right: 8px;
    font-size: 10px; font-weight: 700;
    background: var(--md-sys-color-surface);
    color: var(--md-sys-color-on-surface);
    padding: 4px 10px; border-radius: 99px;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    box-shadow: var(--md-sys-elevation-1);
    opacity: 0.9;
}

.token-info { padding: 12px; }
.token-color-name { font-weight: 700; color: var(--md-sys-color-on-surface); font-size: 14px; margin-bottom: 4px; }
.token-hex-code { font-size: 11px; color: var(--md-sys-color-on-surface-variant); font-weight: 500; font-family: monospace; opacity: 0.8; margin-bottom: 12px; }
.token-var-name {
    font-family: 'JetBrains Mono', 'Roboto Mono', monospace; font-size: 10px;
    color: var(--md-sys-color-on-surface-variant);
    background: var(--md-sys-color-surface-container-high);
    padding: 4px 10px; border-radius: 6px;
    cursor: pointer; margin-bottom: 0;
    word-break: break-all; display: block;
    border: 1px solid var(--md-sys-color-outline-variant);
    transition: 0.2s;
}
.token-var-name:hover { background: var(--md-sys-color-primary-container); color: var(--md-sys-color-primary); border-color: var(--md-sys-color-primary); }


/* --- TOAST --- */
.pg-toast {
    position: fixed; bottom: 24px; left: 50%; transform: translateX(-50%) translateY(100px);
    background: var(--md-sys-color-inverse-surface); color: var(--md-sys-color-inverse-on-surface);
    padding: 12px 24px; border-radius: 99px; font-size: 14px; font-weight: 500;
    z-index: 1000; transition: 0.3s cubic-bezier(0.175, 0.885, 0.32, 1.275);
    box-shadow: var(--md-sys-elevation-3); opacity: 0;
}
.pg-toast.show { transform: translateX(-50%) translateY(0); opacity: 1; }

/* --- TABS --- */
.tabs-container {
    display: flex; 
    border-bottom: 1px solid var(--md-sys-color-outline-variant); 
    z-index: 10;
    background: var(--md-sys-color-surface); 
    padding: 0 32px; 
    flex-shrink: 0; 
    border-top-left-radius: var(--md-sys-shape-corner-large); 
    border-top-right-radius: var(--md-sys-shape-corner-large);
}
.md-tab {
    flex: 1; height: 48px; display: flex; align-items: center; justify-content: center;
    font: var(--md-sys-typescale-title-small); color: var(--md-sys-color-on-surface-variant);
    cursor: pointer; position: relative; transition: 0.2s;
    max-width: 200px;
    border-top-left-radius: var(--md-sys-shape-corner-medium);
    border-top-right-radius: var(--md-sys-shape-corner-medium);
}
.md-tab:hover { 
    background: var(--md-sys-color-surface-container-highest); 
    color: var(--md-sys-color-on-surface);
}
.md-tab.active { color: var(--md-sys-color-primary); }
.md-tab.active:hover { background: var(--md-sys-color-surface-container-highest); }
.md-tab.active::after {
    content: ""; position: absolute; bottom: 0; left: 0; right: 0; height: 3px;
    background: var(--md-sys-color-primary); border-radius: 3px 3px 0 0;
}
.tab-panel { display: none; padding: 32px; }
.tab-panel.active { display: block; animation: fade-up 0.3s ease; }
@keyframes fade-up { from { opacity: 0; transform: translateY(10px); } to { opacity: 1; transform: translateY(0); } }

/* --- LAB LAYOUT --- */
.screenshot-layout {
    display: grid;
    grid-template-columns: 140px 1fr 1fr;
    gap: 40px;
    align-items: start;
}

@media (max-width: 1100px) {
    .screenshot-layout {
        grid-template-columns: 1fr;
        gap: 32px;
    }
}

@media (max-width: 600px) {
    #lab-panel, #palette-panel { padding: 16px !important; }
    .token-grid { gap: 8px; }
    .token-info { padding: 8px; }
    .token-card { border-radius: 12px; }
}

.screenshot-column {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.screenshot-column .md-btn { width: 140px; }

.screenshot-card {
    background: var(--md-sys-color-surface-container-low);
    padding: 16px;
    width: 100%;
    max-width: 320px;
    border: 1px solid var(--md-sys-color-outline-variant);
    transition: 0.2s;
    position: relative;
    overflow: hidden;
}
.interactive-card:hover {
    background: var(--md-sys-color-surface-container);
    box-shadow: var(--md-sys-elevation-1);
    transform: translateY(-2px);
}

.card-image-placeholder {
    background: var(--md-sys-color-primary-container);
    aspect-ratio: 16 / 10;
    border-radius: var(--md-sys-shape-corner-medium);
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 20px;
}
.card-image-placeholder .material-symbols-rounded {
    font-size: 64px;
    color: var(--md-sys-color-on-primary-container);
    opacity: 0.8;
}

.card-content h3 {
    font: var(--md-sys-typescale-title-medium);
    color: var(--md-sys-color-on-surface);
    margin-bottom: 8px;
}
.card-content p {
    font: var(--md-sys-typescale-body-medium);
    color: var(--md-sys-color-on-surface-variant);
    line-height: 1.5;
    margin-bottom: 24px;
}

.card-footer {
    display: flex;
    justify-content: space-between;
    align-items: center;
}
.footer-btn {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 6px 12px;
    border-radius: 99px;
    border: none;
    background: transparent;
    color: var(--md-sys-color-on-surface);
    font: var(--md-sys-typescale-label-large);
    font-weight: 500;
    cursor: pointer;
    transition: 0.2s;
}
.footer-btn:hover {
    background: var(--md-sys-color-surface-container-highest);
}
.footer-btn .material-symbols-rounded { font-size: 20px; }

.controls-row {
    display: flex;
    align-items: center;
    gap: 24px;
    margin-top: 20px;
}

.md-radio-circle {
    width: 24px;
    height: 24px;
    border-radius: 50%;
    border: 2px solid var(--md-sys-color-primary);
}

.progress-section {
    margin-top: 32px;
}
.progress-section label {
    display: block;
    font: var(--md-sys-typescale-label-large);
    font-weight: 500;
    color: var(--md-sys-color-on-surface-variant);
    margin-bottom: 12px;
}

.line-progress {
    width: 100%;
    height: 4px;
    background: var(--md-sys-color-surface-container-highest);
    border-radius: 2px;
    overflow: hidden;
}
.line-progress-fill {
    width: 70%;
    height: 100%;
    background: var(--md-sys-color-primary);
}

.md-checkbox {
    width: 20px; height: 20px;
    accent-color: var(--md-sys-color-primary);
    cursor: pointer;
}

/* --- RESPONSIVE SIDEBAR --- */
@media (max-width: 900px) {
    .playground-layout {
        grid-template-columns: 1fr;
        height: auto;
        overflow: visible;
        gap: 16px;
        padding-bottom: 40px;
    }
    .playground-sidebar { 
        overflow: visible;
        height: auto;
    }
    .toggle-group {
        width: 100%;
        display: flex;
    }
    .toggle-btn {
        flex: 1;
        justify-content: center;
    }
}



.matrix-section-reference {
    margin-top: 48px;
}