/* ============================================
   UNIFIED SETTINGS PANEL - Blender-style UI
   ============================================ */

/* Panel Container */
.settings-panel {
    position: fixed;
    right: 16px;
    top: 50%;
    transform: translateY(-50%);
    z-index: 10000;
    font-family: 'JetBrains Mono', 'Consolas', monospace;
    font-size: 11px;
    user-select: none;
}

/* Toggle Button */
.sp-toggle {
    position: absolute;
    right: 0;
    top: 50%;
    transform: translateY(-50%);
    width: 36px;
    height: 36px;
    background: rgba(30, 35, 45, 0.95);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 6px;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    color: #888;
    transition: all 0.2s ease;
    backdrop-filter: blur(10px);
}

.sp-toggle:hover {
    background: rgba(40, 45, 55, 0.98);
    color: #e8b923;
    border-color: rgba(232, 185, 35, 0.3);
}

.sp-toggle svg {
    width: 18px;
    height: 18px;
}

.settings-panel.open .sp-toggle {
    right: calc(100% - 36px);
    background: rgba(232, 185, 35, 0.15);
    color: #e8b923;
    border-color: rgba(232, 185, 35, 0.3);
}

/* Main Container */
.sp-container {
    position: absolute;
    right: 0;
    top: 50%;
    transform: translateY(-50%) translateX(calc(100% + 20px));
    width: 280px;
    max-height: 80vh;
    background: rgba(20, 24, 30, 0.98);
    border: 1px solid rgba(255, 255, 255, 0.08);
    border-radius: 8px;
    overflow: hidden;
    opacity: 0;
    pointer-events: none;
    transition: all 0.25s cubic-bezier(0.4, 0, 0.2, 1);
    backdrop-filter: blur(20px);
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.5);
    display: flex;
    flex-direction: column;
}

.settings-panel.open .sp-container {
    transform: translateY(-50%) translateX(0);
    opacity: 1;
    pointer-events: auto;
}

/* Header */
.sp-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 10px 12px;
    background: rgba(0, 0, 0, 0.3);
    border-bottom: 1px solid rgba(255, 255, 255, 0.06);
}

.sp-title {
    font-size: 11px;
    font-weight: 600;
    color: #e8b923;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.sp-header-actions {
    display: flex;
    gap: 4px;
}

.sp-action-btn {
    padding: 4px 8px;
    font-size: 9px;
    font-family: inherit;
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 3px;
    color: #888;
    cursor: pointer;
    transition: all 0.15s ease;
}

.sp-action-btn:hover {
    background: rgba(232, 185, 35, 0.15);
    border-color: rgba(232, 185, 35, 0.3);
    color: #e8b923;
}

/* Tabs */
.sp-tabs {
    display: flex;
    background: rgba(0, 0, 0, 0.2);
    border-bottom: 1px solid rgba(255, 255, 255, 0.06);
}

.sp-tab {
    flex: 1;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 2px;
    padding: 8px 4px;
    background: none;
    border: none;
    border-bottom: 2px solid transparent;
    color: #666;
    cursor: pointer;
    transition: all 0.15s ease;
    font-family: inherit;
}

.sp-tab:hover {
    color: #aaa;
    background: rgba(255, 255, 255, 0.02);
}

.sp-tab.active {
    color: #e8b923;
    border-bottom-color: #e8b923;
    background: rgba(232, 185, 35, 0.05);
}

.sp-tab-icon {
    display: flex;
    align-items: center;
    justify-content: center;
}

.sp-tab-icon svg {
    width: 16px;
    height: 16px;
}

.sp-tab-label {
    font-size: 9px;
    text-transform: uppercase;
    letter-spacing: 0.3px;
}

/* Content Area */
.sp-content {
    flex: 1;
    overflow-y: auto;
    overflow-x: hidden;
    scrollbar-width: thin;
    scrollbar-color: rgba(255, 255, 255, 0.1) transparent;
}

.sp-content::-webkit-scrollbar {
    width: 6px;
}

.sp-content::-webkit-scrollbar-track {
    background: transparent;
}

.sp-content::-webkit-scrollbar-thumb {
    background: rgba(255, 255, 255, 0.1);
    border-radius: 3px;
}

.sp-content::-webkit-scrollbar-thumb:hover {
    background: rgba(255, 255, 255, 0.2);
}

/* Sections */
.sp-section {
    border-bottom: 1px solid rgba(255, 255, 255, 0.04);
}

.sp-section:last-child {
    border-bottom: none;
}

.sp-section-header {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 10px 12px;
    cursor: pointer;
    transition: background 0.15s ease;
    position: relative;
}

.sp-section-header::before {
    content: '';
    position: absolute;
    left: 0;
    top: 0;
    bottom: 0;
    width: 3px;
    background: var(--section-color, #888);
    opacity: 0.5;
    transition: opacity 0.15s ease;
}

.sp-section-header:hover {
    background: rgba(255, 255, 255, 0.03);
}

.sp-section-header:hover::before {
    opacity: 1;
}

.sp-section.expanded .sp-section-header::before {
    opacity: 1;
}

.sp-section-icon {
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--section-color, #888);
}

.sp-section-icon svg {
    width: 14px;
    height: 14px;
}

.sp-section-label {
    flex: 1;
    font-size: 11px;
    font-weight: 500;
    color: #ccc;
}

.sp-section-chevron {
    display: flex;
    align-items: center;
    color: #555;
    transition: transform 0.2s ease;
}

.sp-section-chevron svg {
    width: 12px;
    height: 12px;
}

.sp-section.expanded .sp-section-chevron {
    transform: rotate(180deg);
}

/* Toggle Switch */
.sp-toggle-switch {
    position: relative;
    width: 28px;
    height: 14px;
    margin-right: 4px;
    cursor: pointer;
}

.sp-toggle-input {
    opacity: 0;
    width: 0;
    height: 0;
    position: absolute;
}

.sp-toggle-slider {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(80, 80, 80, 0.6);
    border-radius: 14px;
    transition: all 0.2s ease;
}

.sp-toggle-slider::before {
    content: '';
    position: absolute;
    width: 10px;
    height: 10px;
    left: 2px;
    bottom: 2px;
    background: #888;
    border-radius: 50%;
    transition: all 0.2s ease;
}

.sp-toggle-input:checked + .sp-toggle-slider {
    background: var(--section-color, #e8b923);
}

.sp-toggle-input:checked + .sp-toggle-slider::before {
    transform: translateX(14px);
    background: #fff;
}

.sp-toggle-switch:hover .sp-toggle-slider {
    background: rgba(100, 100, 100, 0.8);
}

.sp-toggle-input:checked + .sp-toggle-slider:hover {
    filter: brightness(1.1);
}

/* Checkbox Switch (for control rows) */
.sp-checkbox-row {
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.sp-checkbox-switch {
    position: relative;
    width: 32px;
    height: 16px;
    cursor: pointer;
    flex-shrink: 0;
}

.sp-checkbox-input {
    opacity: 0;
    width: 0;
    height: 0;
    position: absolute;
}

.sp-checkbox-slider {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(80, 80, 80, 0.6);
    border-radius: 16px;
    transition: all 0.2s ease;
}

.sp-checkbox-slider::before {
    content: '';
    position: absolute;
    width: 12px;
    height: 12px;
    left: 2px;
    bottom: 2px;
    background: #888;
    border-radius: 50%;
    transition: all 0.2s ease;
}

.sp-checkbox-input:checked + .sp-checkbox-slider {
    background: #22d3ee;
}

.sp-checkbox-input:checked + .sp-checkbox-slider::before {
    transform: translateX(16px);
    background: #fff;
}

.sp-checkbox-switch:hover .sp-checkbox-slider {
    background: rgba(100, 100, 100, 0.8);
}

.sp-checkbox-input:checked + .sp-checkbox-slider:hover {
    filter: brightness(1.1);
}

/* Disabled Section */
.sp-section.disabled .sp-section-header {
    opacity: 0.5;
}

.sp-section.disabled .sp-section-header::before {
    opacity: 0.2;
}

.sp-section.disabled .sp-section-content {
    opacity: 0.3;
    pointer-events: none;
}

.sp-section.disabled .sp-toggle-switch {
    opacity: 1;
}

.sp-section.disabled .sp-section-header .sp-toggle-switch {
    pointer-events: auto;
}

/* Section Content */
.sp-section-content {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.25s cubic-bezier(0.4, 0, 0.2, 1);
    background: rgba(0, 0, 0, 0.15);
}

.sp-section.expanded .sp-section-content {
    max-height: 2000px;
}

/* Subheaders */
.sp-subheader {
    padding: 8px 12px 4px;
    font-size: 9px;
    font-weight: 600;
    color: #666;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    border-top: 1px solid rgba(255, 255, 255, 0.04);
    margin-top: 4px;
}

.sp-subheader:first-child {
    border-top: none;
    margin-top: 0;
}

/* Control Rows */
.sp-control-row {
    display: flex;
    align-items: center;
    padding: 4px 12px;
    gap: 8px;
}

.sp-control-row:hover {
    background: rgba(255, 255, 255, 0.02);
}

.sp-control-label {
    width: 90px;
    flex-shrink: 0;
    font-size: 10px;
    color: #888;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.sp-control-input {
    flex: 1;
    display: flex;
    align-items: center;
    gap: 6px;
}

/* Sliders */
.sp-slider {
    flex: 1;
    max-width: 90px;
    height: 4px;
    -webkit-appearance: none;
    appearance: none;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 2px;
    outline: none;
    cursor: pointer;
}

.sp-slider::-webkit-slider-thumb {
    -webkit-appearance: none;
    appearance: none;
    width: 12px;
    height: 12px;
    background: #e8b923;
    border-radius: 50%;
    cursor: pointer;
    transition: transform 0.1s ease;
}

.sp-slider::-webkit-slider-thumb:hover {
    transform: scale(1.2);
}

.sp-slider::-moz-range-thumb {
    width: 12px;
    height: 12px;
    background: #e8b923;
    border: none;
    border-radius: 50%;
    cursor: pointer;
}

.sp-value {
    min-width: 36px;
    text-align: right;
    font-size: 10px;
    color: #aaa;
    font-variant-numeric: tabular-nums;
}

/* Color Pickers */
.sp-color-row {
    padding: 6px 12px;
}

.sp-color {
    width: 48px;
    height: 20px;
    padding: 0;
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 3px;
    cursor: pointer;
    background: none;
}

.sp-color::-webkit-color-swatch-wrapper {
    padding: 2px;
}

.sp-color::-webkit-color-swatch {
    border-radius: 2px;
    border: none;
}

/* Kelvin Slider Labels */
.sp-kelvin-label {
    font-size: 9px;
    font-weight: 600;
    width: 14px;
    text-align: center;
}

.sp-kelvin-label.cold {
    color: #ff6b4a;
}

.sp-kelvin-label.hot {
    color: #64b5f6;
}

/* Light Control Blocks */
.sp-light-block {
    padding: 8px 12px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.04);
}

.sp-light-block:last-of-type {
    border-bottom: none;
}

.sp-light-header {
    display: flex;
    align-items: center;
    gap: 8px;
    margin-bottom: 8px;
}

.sp-light-preview {
    width: 16px;
    height: 16px;
    border-radius: 50%;
    border: 1px solid rgba(255, 255, 255, 0.2);
    box-shadow: 0 0 8px currentColor;
}

.sp-light-name {
    flex: 1;
    font-size: 11px;
    font-weight: 500;
    color: #ccc;
}

.sp-light-kelvin {
    font-size: 10px;
    color: #888;
    font-variant-numeric: tabular-nums;
}

.sp-light-block .sp-control-row {
    padding: 2px 0;
}

.sp-light-block .sp-control-label {
    width: 70px;
}

/* Action Buttons */
.sp-button-row {
    padding: 6px 12px;
}

.sp-button {
    width: 100%;
    padding: 6px 12px;
    background: rgba(232, 185, 35, 0.15);
    border: 1px solid rgba(232, 185, 35, 0.3);
    border-radius: 4px;
    color: #e8b923;
    font-family: inherit;
    font-size: 10px;
    cursor: pointer;
    transition: all 0.15s ease;
}

.sp-button:hover {
    background: rgba(232, 185, 35, 0.25);
    border-color: rgba(232, 185, 35, 0.5);
}

.sp-button:active {
    background: rgba(232, 185, 35, 0.35);
    transform: scale(0.98);
}

/* Responsive */
@media (max-width: 900px) {
    .settings-panel {
        display: none;
    }
}

/* Hide old controls when new panel is active */
.shader-controls-container,
.light-controls,
#planet-a-controls,
#planet-b-controls,
#sun-controls,
#particles-controls,
#debug-controls {
    display: none !important;
}