/* ============================================
   PLACEHOLDER GENERATOR CSS
   Dark theme, modern design matching typescale
   Blue and green color scheme
   ============================================ */

:root {
    /* Background colors */
    --bg-primary: #1a1a1a;
    --bg-secondary: #2d2d2d;
    --bg-tertiary: #404040;

    /* Border & text */
    --border-color: #404040;
    --text-primary: #ffffff;
    --text-secondary: #adb5bd;

    /* Accent colors - Blue primary, Green success */
    --accent-color: #0d6efd;
    --accent-hover: #0b5ed7;
    --accent-success: #66BB6A;
    --accent-success-hover: #5da65f;

    /* Visual effects */
    --shadow: 0 2px 8px rgba(0,0,0,0.3);
    --shadow-strong: 0 4px 20px rgba(0,0,0,0.4);
}

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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    background: var(--bg-tertiary);
    color: var(--text-primary);
    min-height: 100vh;
    overflow-x: hidden;
    overflow-y: auto;
    display: flex;
    flex-direction: column;
}

/* App Container */
.app-container {
    flex: 1;
    overflow-y: auto;
    overflow-x: hidden;
    display: flex;
    flex-direction: column;
    padding-top: 20px;
}

.main-container {
    flex: 1;
    display: flex;
    gap: 20px;
    max-width: 1600px;
    margin: 0 auto;
    padding: 0 20px 20px;
    width: 100%;
}

/* Controls Panel - 320px sticky sidebar like typescale */
.controls-panel {
    width: 320px;
    background: var(--bg-primary);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 24px;
    height: fit-content;
    position: sticky;
    top: 20px;
    flex-shrink: 0;
    box-shadow: var(--shadow);
}

.controls-panel::-webkit-scrollbar {
    width: 6px;
}

.controls-panel::-webkit-scrollbar-track {
    background: transparent;
}

.controls-panel::-webkit-scrollbar-thumb {
    background: var(--border-color);
    border-radius: 3px;
}

.controls-panel::-webkit-scrollbar-thumb:hover {
    background: var(--text-secondary);
}

/* Control Sections */
.control-section {
    margin-bottom: 24px;
}

.control-section:last-child {
    margin-bottom: 0;
}

.section-header {
    margin-bottom: 16px;
}

.section-header h3 {
    font-size: 16px;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 0;
}

/* Form Elements */
.form-group {
    margin-bottom: 16px;
}

.form-group:last-child {
    margin-bottom: 0;
}

.form-group label {
    display: block;
    margin-bottom: 8px;
    font-size: 13px;
    font-weight: 600;
    color: var(--text-primary);
}

.form-input {
    width: 100%;
    padding: 10px 12px;
    border: 2px solid var(--border-color);
    border-radius: 8px;
    font-size: 14px;
    background: var(--bg-secondary);
    color: var(--text-primary);
    transition: all 0.2s;
}

.form-input:focus {
    outline: none;
    border-color: var(--accent-color);
    box-shadow: 0 0 0 3px rgba(13, 110, 253, 0.1);
}

.form-input::placeholder {
    color: var(--text-secondary);
}

.input-hint {
    margin-top: 6px;
    font-size: 12px;
    color: var(--text-secondary);
    font-style: italic;
}

/* Color Controls */
.color-group {
    margin-bottom: 20px;
}

.color-group:last-child {
    margin-bottom: 0;
}

.color-group label {
    display: block;
    margin-bottom: 10px;
    font-size: 13px;
    font-weight: 600;
    color: var(--text-primary);
}

.color-input-group {
    display: flex;
    gap: 10px;
    margin-bottom: 12px;
}

.color-picker {
    width: 44px;
    height: 44px;
    border: 2px solid var(--border-color);
    border-radius: 8px;
    cursor: pointer;
    background: none;
    padding: 4px;
    flex-shrink: 0;
    transition: border-color 0.2s;
}

.color-picker:hover {
    border-color: var(--accent-color);
}

.color-picker::-webkit-color-swatch-wrapper {
    padding: 0;
}

.color-picker::-webkit-color-swatch {
    border: none;
    border-radius: 4px;
}

.color-hex {
    flex: 1;
    text-transform: uppercase;
    font-family: 'Courier New', monospace;
    font-weight: 600;
    font-size: 13px;
}

/* Color Palette */
.color-palette {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
}

.color-preset {
    width: 30px;
    height: 30px;
    border: 2px solid var(--border-color);
    border-radius: 6px;
    cursor: pointer;
    transition: all 0.2s;
    position: relative;
    flex-shrink: 0;
}

.color-preset:hover {
    transform: scale(1.1);
    box-shadow: var(--shadow);
    border-color: var(--accent-color);
}

.color-preset.active {
    border-color: var(--accent-color);
    box-shadow: 0 0 0 2px rgba(13, 110, 253, 0.3);
}

/* URL Output */
.url-output {
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.url-input {
    flex: 1;
    font-family: 'Courier New', monospace;
    font-size: 12px;
    background: var(--bg-tertiary);
    border-color: var(--border-color);
}

.url-input:focus {
    border-color: var(--accent-color);
}

/* Preview Panel */
.preview-panel {
    flex: 1;
    display: flex;
    flex-direction: column;
    background: var(--bg-primary);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 24px;
    box-shadow: var(--shadow);
}

.preview-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 20px;
    padding-bottom: 16px;
    border-bottom: 1px solid var(--border-color);
}

.preview-header h3 {
    font-size: 18px;
    font-weight: 600;
    color: var(--text-primary);
}

.preview-info {
    font-size: 14px;
    font-weight: 600;
    color: var(--text-secondary);
    font-family: 'Courier New', monospace;
}

.preview-container {
    flex: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--bg-secondary);
    border: 2px solid var(--border-color);
    border-radius: 12px;
    padding: 40px;
    margin-bottom: 20px;
    min-height: 400px;
}

.preview-canvas {
    max-width: 100%;
    max-height: 100%;
    border-radius: 8px;
    box-shadow: var(--shadow-strong);
}

.preview-actions {
    display: flex;
    gap: 12px;
    justify-content: center;
}

/* Buttons - Blue primary, Green success */
.btn {
    padding: 12px 24px;
    border: 2px solid var(--border-color);
    border-radius: 8px;
    cursor: pointer;
    font-size: 14px;
    font-weight: 600;
    transition: all 0.2s;
    text-decoration: none;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    background: none;
    white-space: nowrap;
}

.btn-primary {
    background: var(--accent-color);
    color: white;
    border-color: var(--accent-color);
}

.btn-primary:hover {
    background: var(--accent-hover);
    border-color: var(--accent-hover);
    transform: translateY(-2px);
    box-shadow: var(--shadow);
}

.btn-secondary {
    background: var(--bg-tertiary);
    color: var(--text-primary);
    border-color: var(--border-color);
}

.btn-secondary:hover {
    background: var(--bg-secondary);
    border-color: var(--accent-color);
    color: var(--accent-color);
    transform: translateY(-2px);
    box-shadow: var(--shadow);
}

.btn-success {
    background: var(--accent-success);
    color: white;
    border-color: var(--accent-success);
}

.btn-success:hover {
    background: var(--accent-success-hover);
    border-color: var(--accent-success-hover);
    transform: translateY(-2px);
    box-shadow: var(--shadow);
}

/* Responsive Design */
@media (max-width: 1024px) {
    .main-container {
        flex-direction: column;
        gap: 20px;
    }

    .controls-panel {
        width: 100%;
        position: static;
        max-height: none;
    }

    .preview-panel {
        min-height: 500px;
    }
}

@media (max-width: 768px) {
    .app-container {
        padding-top: 12px;
    }

    .main-container {
        padding: 0 12px 12px;
        gap: 16px;
    }

    .controls-panel {
        padding: 20px;
    }

    .preview-panel {
        padding: 20px;
        min-height: 400px;
    }

    .preview-container {
        padding: 20px;
        min-height: 300px;
    }

    .url-output {
        flex-direction: column;
    }

    .preview-actions {
        flex-direction: column;
        width: 100%;
    }

    .btn {
        width: 100%;
        justify-content: center;
    }

    .color-group {
        margin-bottom: 16px;
    }
}

@media (max-width: 480px) {
    .controls-panel {
        padding: 16px;
    }

    .preview-panel {
        padding: 16px;
        min-height: 350px;
    }

    .preview-container {
        padding: 16px;
        min-height: 250px;
    }

    .form-input {
        padding: 10px 12px;
        font-size: 14px;
    }

    .color-picker {
        width: 40px;
        height: 40px;
    }

    .color-preset {
        width: 28px;
        height: 28px;
    }

    .btn {
        padding: 10px 20px;
        font-size: 14px;
    }

    .section-header h3 {
        font-size: 15px;
    }

    .preview-header h3 {
        font-size: 16px;
    }
}