/**
 * KINVA Studio - Frontend CSS
 * Művész eszközök közös stílusok
 */

/* CSS Variables */
.kinva-studio-tool {
    --studio-primary: #1f8f66;
    --studio-primary-hover: #15654a;
    --studio-accent: #e0a800;
    --studio-accent-hover: #c79400;
    --studio-bg: #f9fafb;
    --studio-bg-panel: #ffffff;
    --studio-bg-hover: #f0f0f0;
    --studio-text: #333333;
    --studio-text-medium: #555555;
    --studio-text-light: #666666;
    --studio-border: #e5e7eb;
    --studio-radius: 6px;
    --studio-shadow: 0 2px 8px rgba(0,0,0,0.08);
    --studio-transition: 0.15s ease;
}

/* Container */
.kinva-studio-tool {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    background: var(--studio-bg);
    border-radius: var(--studio-radius);
    overflow: hidden;
    box-shadow: var(--studio-shadow);
}

.kinva-studio-tool * {
    box-sizing: border-box;
}

/* Layout */
.kinva-studio-layout {
    display: flex;
    min-height: 600px;
}

/* Canvas Area */
.kinva-studio-canvas-area {
    flex: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--studio-bg);
    position: relative;
    overflow: hidden;
    min-width: 0;
    padding: 1.5rem;
}

.kinva-studio-canvas {
    max-width: 100%;
    max-height: 100%;
    display: block;
    box-shadow: 0 8px 24px rgba(0,0,0,0.12);
    border-radius: 4px;
}

/* Dropzone */
.kinva-studio-dropzone {
    position: absolute;
    inset: 1rem;
    display: none;
    align-items: center;
    justify-content: center;
    background: rgba(255, 255, 255, 0.95);
    border: 3px dashed var(--studio-primary);
    border-radius: 12px;
    z-index: 10;
}

.kinva-studio-dropzone.active {
    display: flex;
}

.kinva-studio-dropzone-content {
    text-align: center;
}

.kinva-studio-dropzone-icon {
    font-size: 3rem;
    display: block;
    margin-bottom: 0.5rem;
}

.kinva-studio-dropzone p {
    font-size: 1.25rem;
    color: var(--studio-primary);
    font-weight: 600;
    margin: 0;
}

/* Empty State */
.kinva-studio-empty {
    position: absolute;
    inset: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 2rem;
    text-align: center;
}

.kinva-studio-empty.hidden {
    display: none;
}

.kinva-studio-empty-icon {
    font-size: 4rem;
    margin-bottom: 1rem;
    opacity: 0.6;
}

.kinva-studio-empty h3 {
    font-size: 1.5rem;
    color: var(--studio-text);
    margin: 0 0 0.75rem 0;
}

.kinva-studio-empty p {
    color: var(--studio-text-medium);
    margin: 0 0 1.5rem 0;
    font-size: 1rem;
    line-height: 1.6;
}

/* Sidebar */
.kinva-studio-sidebar {
    width: 300px;
    background: var(--studio-bg-panel);
    border-left: 1px solid var(--studio-border);
    overflow-y: auto;
    flex-shrink: 0;
    display: flex;
    flex-direction: column;
}

/* Section */
.kinva-studio-section {
    padding: 1rem 1.25rem;
    border-bottom: 1px solid var(--studio-border);
}

.kinva-studio-section h4 {
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--studio-text-medium);
    margin: 0 0 0.75rem 0;
    font-weight: 700;
}

/* Buttons */
.kinva-btn {
    display: block;
    width: 100%;
    padding: 0.75rem 1rem;
    background: var(--studio-primary);
    color: white;
    border: none;
    border-radius: var(--studio-radius);
    font-size: 0.9rem;
    font-weight: 600;
    cursor: pointer;
    transition: all var(--studio-transition);
    text-align: center;
    margin-bottom: 0.5rem;
}

.kinva-btn:last-child {
    margin-bottom: 0;
}

.kinva-btn:hover:not(:disabled) {
    background: var(--studio-primary-hover);
    transform: translateY(-1px);
}

.kinva-btn:disabled {
    background: var(--studio-bg-hover);
    color: var(--studio-text-light);
    cursor: not-allowed;
    opacity: 0.6;
    transform: none;
}

.kinva-btn-accent {
    background: var(--studio-accent);
}

.kinva-btn-accent:hover:not(:disabled) {
    background: var(--studio-accent-hover);
}

.kinva-btn-secondary {
    background: var(--studio-bg-panel);
    color: var(--studio-text-medium);
    border: 2px solid var(--studio-border);
}

.kinva-btn-secondary:hover:not(:disabled) {
    background: var(--studio-bg-hover);
    border-color: var(--studio-text-medium);
}

.kinva-btn-primary {
    background: var(--studio-primary);
}

/* Form Elements */
.kinva-studio-field {
    margin-bottom: 0.85rem;
}

.kinva-studio-field:last-child {
    margin-bottom: 0;
}

.kinva-studio-field label {
    display: block;
    font-size: 0.85rem;
    margin-bottom: 0.4rem;
    color: var(--studio-text);
    font-weight: 500;
}

.kinva-studio-select,
.kinva-studio-input {
    width: 100%;
    padding: 0.6rem 0.75rem;
    background: var(--studio-bg-panel);
    color: var(--studio-text);
    border: 1px solid var(--studio-border);
    border-radius: 4px;
    font-size: 0.9rem;
    transition: border-color var(--studio-transition);
}

.kinva-studio-select:focus,
.kinva-studio-input:focus {
    outline: none;
    border-color: var(--studio-primary);
    box-shadow: 0 0 0 3px rgba(31, 143, 102, 0.15);
}

.kinva-studio-color {
    width: 100%;
    height: 40px;
    border: 1px solid var(--studio-border);
    border-radius: 4px;
    cursor: pointer;
    padding: 3px;
}

/* Density Grid */
.kinva-studio-density-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 0.75rem;
}

.kinva-studio-density-grid label {
    font-size: 0.8rem;
    margin-bottom: 0.3rem;
}

/* Range Slider */
.kinva-studio-range-wrap {
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.kinva-studio-range {
    flex: 1;
    height: 6px;
    background: var(--studio-border);
    border-radius: 3px;
    outline: none;
    -webkit-appearance: none;
}

.kinva-studio-range::-webkit-slider-thumb {
    -webkit-appearance: none;
    width: 18px;
    height: 18px;
    background: var(--studio-primary);
    border-radius: 50%;
    cursor: pointer;
    box-shadow: 0 2px 4px rgba(0,0,0,0.2);
}

.kinva-studio-range::-moz-range-thumb {
    width: 18px;
    height: 18px;
    background: var(--studio-primary);
    border-radius: 50%;
    cursor: pointer;
    border: none;
    box-shadow: 0 2px 4px rgba(0,0,0,0.2);
}

.kinva-studio-range-value {
    font-size: 0.85rem;
    color: var(--studio-primary);
    font-weight: 700;
    min-width: 45px;
    text-align: right;
}

/* Toggle */
.kinva-studio-toggle-row {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 0.85rem;
}

.kinva-studio-toggle-row:last-child {
    margin-bottom: 0;
}

.kinva-studio-toggle-row label {
    font-size: 0.875rem;
    color: var(--studio-text);
    font-weight: 500;
}

.kinva-studio-toggle {
    position: relative;
    width: 46px;
    height: 26px;
    background: var(--studio-border);
    border-radius: 13px;
    cursor: pointer;
    transition: background var(--studio-transition);
}

.kinva-studio-toggle.active {
    background: var(--studio-primary);
}

.kinva-studio-toggle::after {
    content: '';
    position: absolute;
    top: 3px;
    left: 3px;
    width: 20px;
    height: 20px;
    background: white;
    border-radius: 50%;
    transition: left var(--studio-transition);
    box-shadow: 0 2px 4px rgba(0,0,0,0.2);
}

.kinva-studio-toggle.active::after {
    left: 23px;
}

/* File Input (hidden) */
.kinva-studio-file-input {
    display: none;
}

/* Actions Section */
.kinva-studio-actions {
    margin-top: auto;
}

/* Credits */
.kinva-studio-credits {
    padding: 1rem 1.25rem;
    text-align: center;
    font-size: 0.75rem;
    color: var(--studio-text-light);
    border-top: 1px solid var(--studio-border);
}

.kinva-studio-credits a {
    color: var(--studio-primary);
    text-decoration: none;
    font-weight: 600;
}

.kinva-studio-credits a:hover {
    text-decoration: underline;
}

/* Hide density section for non-square grids */
.kinva-studio-grid[data-grid-type="thirds"] .kinva-studio-density-section,
.kinva-studio-grid[data-grid-type="golden"] .kinva-studio-density-section,
.kinva-studio-grid[data-grid-type="portrait"] .kinva-studio-density-section,
.kinva-studio-grid[data-grid-type="dynamic"] .kinva-studio-density-section {
    display: none;
}

/* ==========================================================================
   RESPONSIVE
   ========================================================================== */

@media (max-width: 900px) {
    .kinva-studio-layout {
        flex-direction: column;
        min-height: auto;
    }
    
    .kinva-studio-canvas-area {
        min-height: 50vh;
        max-height: 60vh;
    }
    
    .kinva-studio-sidebar {
        width: 100%;
        border-left: none;
        border-top: 1px solid var(--studio-border);
        max-height: 50vh;
    }
}

@media (max-width: 600px) {
    .kinva-studio-section {
        padding: 0.85rem 1rem;
    }
    
    .kinva-studio-empty h3 {
        font-size: 1.25rem;
    }
    
    .kinva-studio-empty p {
        font-size: 0.9rem;
    }
    
    .kinva-btn {
        padding: 0.65rem 0.85rem;
        font-size: 0.85rem;
    }
}

/* ==========================================================================
   COMPACT MODE
   ========================================================================== */

.kinva-studio-compact .kinva-studio-layout {
    min-height: 450px;
}

.kinva-studio-compact .kinva-studio-sidebar {
    width: 260px;
}

.kinva-studio-compact .kinva-studio-section {
    padding: 0.75rem 1rem;
}

.kinva-studio-compact .kinva-studio-section h4 {
    font-size: 0.7rem;
    margin-bottom: 0.5rem;
}