/* ===== CSS Variables ===== */
:root {
    /* Colors */
    --color-primary: #E0CF8F;
    --color-secondary: #637366;
    --color-background: #F3EEEA;
    --color-panel-bg: rgba(251, 251, 251, 0.95);
    --color-panel-secondary: rgba(243, 238, 234, 0.95);
    --color-text: #637366;
    --color-text-light: #F3EEEA;
    
    /* Spacing */
    --spacing-xs: 3px;
    --spacing-sm: 5px;
    --spacing-md: 10px;
    --spacing-lg: 15px;
    --spacing-xl: 20px;
    
    /* Typography */
    --font-size-xs: 11px;
    --font-size-sm: 12px;
    --font-size-base: 14px;
    
    /* Borders & Shadows */
    --border-radius: 5px;
    --border-radius-sm: 3px;
    --transition-speed: 0.3s;
}

/* ===== Base Styles ===== */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: Arial, sans-serif;
    background: #fff;
    overflow: hidden;
    color: var(--color-text);
}

/* ===== Panels ===== */
.panel {
    position: absolute;
    background: var(--color-panel-bg);
    border-radius: var(--border-radius);
    border: 1px solid var(--color-primary);
}

#info {
    top: var(--spacing-md);
    left: var(--spacing-md);
    padding: var(--spacing-lg);
    max-width: 300px;
}

#info h3 {
    margin: 0 0 var(--spacing-md) 0;
    color: var(--color-secondary);
}

#info p {
    margin: var(--spacing-sm) 0;
    font-size: var(--font-size-base);
    line-height: 1.4;
}

.controls-help {
    font-size: var(--font-size-sm);
    margin-top: var(--spacing-md);
}

#controls {
    top: var(--spacing-md);
    right: var(--spacing-md);
    background: var(--color-panel-secondary);
    width: 350px;
    max-height: calc(100vh - 40px);
    display: flex;
    flex-direction: row-reverse;
    overflow: hidden;
    transition: all var(--transition-speed) ease;
}

#controls.collapsed {
    width: 40px;
}

#controls.collapsed .tab:not(.collapse-btn) {
    display: none;
}

/* ===== Tabs ===== */
.tabs {
    display: flex;
    flex-direction: column;
    background: var(--color-secondary);
    border-left: 2px solid var(--color-primary);
    width: 40px;
    flex-shrink: 0;
}

.tab {
    padding: 15px 5px;
    cursor: pointer;
    border: none;
    background: transparent;
    color: var(--color-text-light);
    font-size: var(--font-size-sm);
    transition: all var(--transition-speed);
    white-space: nowrap;
    writing-mode: vertical-rl;
    text-orientation: mixed;
    width: 100%;
    text-align: center;
}

.tab:hover {
    background: rgba(224, 207, 143, 0.3);
}

.tab.active {
    background: var(--color-primary);
    color: var(--color-secondary);
    font-weight: bold;
}

.collapse-btn {
    margin-top: auto;
    height: 40px;
    width: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
    writing-mode: horizontal-tb;
}

/* ===== Tab Contents Wrapper ===== */
.tab-contents-wrapper {
    flex-grow: 1;
    overflow: hidden;
    position: relative;
}

/* ===== Tab Content ===== */
.tab-content {
    display: none;
    padding: var(--spacing-md);
    overflow-y: auto;
    overflow-x: hidden;
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
}

.tab-content.active {
    display: block;
}

/* ===== Controls Grid ===== */
.controls-grid {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-lg);
}

/* ===== Control Groups ===== */
.control-group {
    background: rgba(251, 251, 251, 0.8);
    padding: 8px;
    border-radius: 4px;
    border: 1px solid rgba(99, 115, 102, 0.2);
}

.control-group h4 {
    margin: 0 0 8px 0;
    font-size: var(--font-size-sm);
    color: var(--color-secondary);
    font-weight: bold;
}

/* ===== Form Elements ===== */
.slider-container {
    margin: var(--spacing-sm) 0;
}

.slider-container label {
    display: block;
    margin-bottom: var(--spacing-xs);
    font-size: var(--font-size-xs);
}

.slider {
    width: 100%;
    accent-color: var(--color-primary);
}

.value-display {
    font-weight: normal;
}

.select-input {
    width: 100%;
    padding: 6px 10px;
    margin-top: var(--spacing-xs);
    background: var(--color-panel-bg);
    border: 1px solid var(--color-secondary);
    border-radius: var(--border-radius-sm);
    font-size: var(--font-size-sm);
    color: var(--color-text);
    cursor: pointer;
    transition: border-color 0.2s;
}

.select-input:hover {
    border-color: var(--color-primary);
}

.select-input:focus {
    outline: none;
    border-color: var(--color-primary);
    box-shadow: 0 0 0 2px rgba(224, 207, 143, 0.2);
}

.checkbox-container {
    display: flex;
    align-items: center;
    gap: 6px;
    font-size: var(--font-size-xs);
    margin-top: var(--spacing-xs);
}

.checkbox-container input[type="checkbox"] {
    width: 14px;
    height: 14px;
    margin: 0;
    accent-color: var(--color-primary);
}

/* ===== Buttons ===== */
button {
    font-family: inherit;
    transition: all 0.2s;
    cursor: pointer;
}

.material-btn {
    display: block;
    width: 100%;
    height: 40px;
    margin: var(--spacing-sm) 0;
    padding: 8px;
    background: var(--color-primary);
    border: 1px solid var(--color-secondary);
    border-radius: var(--border-radius-sm);
    font-weight: bold;
    color: var(--color-secondary);
}

.material-btn:hover {
    background: var(--color-secondary);
    color: var(--color-text-light);
}

.btn-small {
    margin-top: var(--spacing-sm);
    padding: 5px 10px;
    background: rgba(99, 115, 102, 0.3);
    border: 1px solid var(--color-secondary);
    border-radius: var(--border-radius-sm);
    font-size: var(--font-size-sm);
    width: auto;
    display: inline-block;
    color: var(--color-secondary);
}

.btn-small:hover {
    background: var(--color-secondary);
    color: var(--color-text-light);
}

/* ===== Export Section ===== */
.export-container {
    text-align: center;
    padding: var(--spacing-xl);
}

.export-btn {
    width: 200px;
    margin: var(--spacing-md);
    padding: var(--spacing-md);
    border: 2px solid var(--color-primary);
    border-radius: var(--border-radius-sm);
    font-weight: bold;
    color: var(--color-secondary);
    background: var(--color-panel-bg);
    transition: all var(--transition-speed);
    cursor: pointer;
}

.export-btn:hover {
    background: var(--color-primary);
    color: var(--color-text-light);
    transform: translateY(-2px);
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.1);
}

.export-btn-stl {
    border-color: var(--color-primary);
}

.export-btn-obj {
    border-color: var(--color-secondary);
}

.export-info {
    font-size: var(--font-size-xs);
    margin-top: var(--spacing-md);
    color: var(--color-secondary);
}

#downloadLinks {
    margin-top: var(--spacing-md);
}

#downloadLinks a {
    color: var(--color-primary);
    text-decoration: underline;
    display: block;
    font-size: var(--font-size-sm);
    margin-top: var(--spacing-sm);
}

#downloadLinks a:hover {
    color: var(--color-secondary);
}

/* ===== Responsive Design ===== */
@media (max-width: 1024px) {
    #controls {
        width: 98%;
    }
    
    .controls-grid {
        grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
        gap: var(--spacing-md);
    }
    
    .tab {
        padding: 6px 10px;
        font-size: var(--font-size-xs);
    }
    
    .control-group {
        padding: 6px;
    }
    
    .slider-container {
        margin: var(--spacing-xs) 0;
    }
    
    #info {
        font-size: var(--font-size-sm);
        padding: var(--spacing-md);
        max-width: 250px;
    }
    
    #info p {
        font-size: var(--font-size-sm);
        line-height: 1.3;
    }
}

@media (max-width: 768px) {
    #info {
        display: none;
    }
    
    #controls {
        top: var(--spacing-sm);
    }
    
    .tab {
        padding: 5px 8px;
        font-size: 10px;
    }
}

/* ===== Utility Classes ===== */
.hidden {
    display: none;
}

.disabled {
    opacity: 0.5;
    pointer-events: none;
}

/* ===== Loading States ===== */
.loading {
    position: relative;
    overflow: hidden;
}

.loading::after {
    content: "";
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.3), transparent);
    animation: loading 1.5s infinite;
}

@keyframes loading {
    to {
        left: 100%;
    }
}