:root {
    --bg-color: #f0f2f5;
    --sidebar-bg: #ffffff;
    --main-bg: #f7f7f8;
    --border-color: #e5e7eb;
    --text-color: #111827;
    --text-secondary: #6b7280;
    --primary-color: #4f46e5;
    --primary-hover: #4338ca;
    --input-bg: #f9fafb;
    --warning-text: #c2410c;
}

* { box-sizing: border-box; }

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    margin: 0;
    background-color: var(--bg-color);
    color: var(--text-color);
    font-size: 14px;
    display: flex;
    height: 100vh;
    overflow: hidden;
}

.container {
    display: flex;
    width: 100%;
    height: 100%;
}

.sidebar {
    width: 350px;
    flex-shrink: 0;
    background-color: var(--sidebar-bg);
    border-right: 1px solid var(--border-color);
    padding: 24px;
    display: flex;
    flex-direction: column;
    overflow-y: auto;
}

.header {
    padding-bottom: 16px;
    margin-bottom: 24px;
    border-bottom: 1px solid var(--border-color);
}
.header h2 { margin: 0; }
.header p { margin: 4px 0 0; color: var(--text-secondary); }

.main-content {
    flex-grow: 1;
    background-color: var(--main-bg);
    padding: 24px;
    overflow-y: auto;
}

#result-panel {
    width: 100%;
    height: 100%;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
}

.form-group { margin-bottom: 20px; }
label { display: block; font-weight: 500; margin-bottom: 8px; }

input[type="password"], textarea, select {
    width: 100%;
    padding: 12px 14px;
    border: 1px solid var(--border-color);
    border-radius: 6px;
    font-size: 16px;
    background-color: var(--input-bg);
    transition: border-color 0.2s;
}
textarea { resize: vertical; }
input:focus, textarea:focus, select:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 2px rgba(79, 70, 229, 0.2);
}

.slider-group .slider-label {
    display: flex;
    justify-content: space-between;
    align-items: center;
}
.slider-group .slider-label span {
    font-weight: 600;
    color: var(--primary-color);
}
.slider-group small, .model-warning {
    display: block;
    margin-top: 6px;
    font-size: 12px;
}
.slider-group small {
    color: var(--text-secondary);
}
.model-warning {
    color: var(--warning-text);
}

input[type="range"] {
    -webkit-appearance: none;
    width: 100%;
    height: 6px;
    background: #ddd;
    border-radius: 5px;
    outline: none;
    margin-top: 8px;
}
input[type="range"]::-webkit-slider-thumb {
    -webkit-appearance: none;
    appearance: none;
    width: 18px;
    height: 18px;
    background: var(--primary-color);
    cursor: pointer;
    border-radius: 50%;
}
input[type="range"]::-moz-range-thumb {
    width: 18px;
    height: 18px;
    background: var(--primary-color);
    cursor: pointer;
    border-radius: 50%;
}

#generate-btn {
    width: 100%;
    padding: 12px;
    background-color: var(--primary-color);
    color: white;
    border: none;
    border-radius: 6px;
    font-size: 16px;
    font-weight: 500;
    cursor: pointer;
    transition: background-color 0.2s;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    margin-top: auto;
}
#generate-btn:hover { background-color: var(--primary-hover); }
#generate-btn:disabled { background-color: #9ca3af; cursor: not-allowed; }

.placeholder {
    text-align: center;
    color: var(--text-secondary);
}

#image-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(256px, 1fr));
    gap: 16px;
    width: 100%;
}
.image-container {
    position: relative;
    overflow: hidden;
    border-radius: 8px;
    box-shadow: 0 4px 12px rgba(0,0,0,0.1);
}
.image-container img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: block;
}

.hidden { display: none; }

.spinner {
    border: 5px solid rgba(0, 0, 0, 0.1);
    width: 50px;
    height: 50px;
    border-radius: 50%;
    border-left-color: var(--primary-color);
    animation: spin 1s ease infinite;
}
@keyframes spin { 0% { transform: rotate(0deg); } 100% { transform: rotate(360deg); } }

.error {
    color: #b91c1c;
    background-color: #fee2e2;
    border: 1px solid #fca5a5;
    padding: 15px;
    border-radius: 6px;
    text-align: center;
    max-width: 600px;
}