:root {
    --bg-primary: #1a1a1a;
    --bg-secondary: #2d2d2d;
    --bg-tertiary: #3a3a3a;
    --text-primary: #ffffff;
    --text-secondary: #b0b0b0;
    --accent-color: #ffd700;
    --border-color: #444;
    --hover-color: #4a4a4a;
}

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

body {
    background-color: var(--bg-primary);
    color: var(--text-primary);
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    overflow-x: hidden;
}

.main-container {
    display: flex;
    min-height: 100vh;
}

/* Sidebar */
.sidebar {
    width: 250px;
    background-color: var(--bg-secondary);
    border-right: 1px solid var(--border-color);
    padding: 20px 0;
    position: fixed;
    height: 100vh;
    overflow-y: auto;
}

.logo {
    display: flex;
    align-items: center;
    padding: 0 20px 30px;
    border-bottom: 1px solid var(--border-color);
    margin-bottom: 20px;
}

.logo-icon {
    width: 24px;
    height: 24px;
    background-color: var(--accent-color);
    border-radius: 50%;
    margin-right: 10px;
}

.logo-text {
    font-size: 16px;
    font-weight: 600;
}

.logo-subtitle {
    font-size: 12px;
    color: var(--text-secondary);
    margin-top: 2px;
}

.nav-menu {
    list-style: none;
    padding: 0 20px;
}

.nav-item {
    margin-bottom: 8px;
}

.nav-link {
    display: flex;
    align-items: center;
    padding: 12px 16px;
    color: var(--text-secondary);
    text-decoration: none;
    border-radius: 8px;
    transition: all 0.3s ease;
}

.nav-link:hover {
    background-color: var(--hover-color);
    color: var(--text-primary);
}

.nav-link.active {
    background-color: var(--bg-tertiary);
    color: var(--text-primary);
}

.nav-link i {
    margin-right: 12px;
    width: 16px;
}

/* Main Content */
.main-content {
    margin-left: 250px;
    flex: 1;
    padding: 30px;
}

.page-header {
    margin-bottom: 30px;
}

.page-title {
    font-size: 28px;
    font-weight: 600;
    margin-bottom: 8px;
}

.page-subtitle {
    color: var(--text-secondary);
    font-size: 14px;
}

.content-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 30px;
    margin-bottom: 30px;
}

/* Cards */
.card {
    background-color: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 24px;
}

.card-header {
    display: flex;
    align-items: center;
    margin-bottom: 20px;
}

.card-icon {
    margin-right: 12px;
    color: var(--text-secondary);
}

.card-title {
    font-size: 16px;
    font-weight: 600;
}

/* Prompt Input */
.prompt-tabs {
    display: flex;
    margin-bottom: 20px;
    border-bottom: 1px solid var(--border-color);
}

.tab-btn {
    background: none;
    border: none;
    color: var(--text-secondary);
    padding: 12px 16px;
    cursor: pointer;
    border-bottom: 2px solid transparent;
    transition: all 0.3s ease;
}

.tab-btn.active {
    color: var(--text-primary);
    border-bottom-color: var(--accent-color);
}

.reference-image {
    border: 2px dashed var(--border-color);
    border-radius: 8px;
    padding: 40px;
    text-align: center;
    margin-bottom: 20px;
    cursor: pointer;
    transition: all 0.3s ease;
}

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

/* When images are present, show previews horizontally */
.reference-image.has-images {
    display: block; /* keep container block so header text stays intact */
    text-align: left;
}

/* Dedicated horizontal preview row */
.preview-list {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    justify-content: flex-start;
    gap: 8px;
    margin-top: 10px;
}

.preview-list .image-preview {
    flex: 0 0 auto;
}

/* Drag & drop visual state */
.reference-image.dragover {
    border-color: var(--accent-color);
    background-color: rgba(255, 215, 0, 0.06);
}

.upload-icon {
    font-size: 24px;
    color: var(--accent-color);
    margin-bottom: 12px;
}

.upload-text {
    color: var(--text-secondary);
    font-size: 14px;
}

.image-counter {
    color: var(--text-secondary);
    font-size: 12px;
    margin-top: 8px;
}

.description-text {
    color: var(--text-secondary);
    font-size: 12px;
    line-height: 1.4;
    margin-top: 12px;
}

/* Output Gallery */
.output-gallery {
    text-align: center;
    padding: 16px 20px; /* reduce gap between header and image */
}

.gallery-icon {
    font-size: 48px;
    color: var(--text-secondary);
    margin-bottom: 20px;
}

.gallery-title {
    font-size: 18px;
    font-weight: 600;
    margin-bottom: 8px;
    color: var(--text-primary);
}

.gallery-subtitle {
    color: var(--text-secondary);
    font-size: 14px;
}

/* Generation Tips */
.tips-section {
    background-color: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 24px;
    margin-bottom: 30px;
}

.tips-header {
    display: flex;
    align-items: center;
    margin-bottom: 16px;
}

.tips-title {
    font-size: 16px;
    font-weight: 600;
    color: var(--text-primary);
}

.tips-content {
    color: var(--text-secondary);
    font-size: 14px;
    line-height: 1.5;
}

/* Generate Button */
.generate-section {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 20px;
}

.generate-btn {
    background: linear-gradient(135deg, var(--accent-color), #ffed4e);
    color: #1a1a1a;
    border: none;
    padding: 16px 32px;
    border-radius: 8px;
    font-size: 16px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    display: flex;
    align-items: center;
    gap: 8px;
}

.generate-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(255, 215, 0, 0.3);
}

.generate-btn:disabled {
    opacity: 0.6;
    cursor: not-allowed;
}

.settings-btn {
    background-color: var(--bg-tertiary);
    color: var(--text-primary);
    border: 1px solid var(--border-color);
    padding: 16px;
    border-radius: 8px;
    cursor: pointer;
    transition: all 0.3s ease;
}

.settings-btn:hover {
    background-color: var(--hover-color);
}

@media (max-width: 768px) {
    .sidebar {
        transform: translateX(-100%);
    }
    
    .main-content {
        margin-left: 0;
    }
    
    .content-grid {
        grid-template-columns: 1fr;
    }
}

/* Ensure readable text colors on dark theme */
.main-content h1,
.main-content h2,
.main-content h3,
.main-content h4,
.main-content h5,
.main-content h6,
.main-content p,
.main-content span,
.main-content label {
    color: var(--text-primary);
}

.page-title,
.card-title,
.logo-text,
.tips-title,
.gallery-title {
    color: var(--text-primary);
}

.page-subtitle,
.description-text,
.gallery-subtitle,
.image-counter,
.upload-text,
.tips-content,
.card-icon {
    color: var(--text-secondary);
}

/* Default anchors on dark background (avoid overriding buttons/dropdown items) */
.main-content a:not(.btn):not(.dropdown-item):not(.btn-link) {
    color: var(--text-secondary);
}
.main-content a:not(.btn):not(.dropdown-item):not(.btn-link):hover {
    color: var(--text-primary);
}

/* Preserve intended colors for buttons and menu items */
.main-content a.btn,
.main-content .dropdown-item,
.main-content .btn-link {
    color: inherit;
}

/* Generated images styling */
.generated-image-card {
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 15px;
    transition: all 0.3s ease;
}

.generated-image-card:hover {
    border-color: var(--accent-color);
    transform: translateY(-2px);
}

.generated-image-card img {
    border-radius: 8px;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.3);
}

/* Image preview styling */
.image-preview {
    position: relative;
    display: inline-block;
    margin: 5px;
    border-radius: 8px;
    overflow: hidden;
    border: 2px solid var(--border-color);
    transition: all 0.3s ease;
}

.image-preview:hover {
    border-color: var(--accent-color);
    transform: scale(1.05);
}

.image-preview img {
    display: block;
    width: 60px;
    height: 60px;
    object-fit: cover;
}

.remove-image-btn {
    position: absolute;
    top: -5px;
    right: -5px;
    background: #ff4757 !important;
    color: white !important;
    border: none !important;
    border-radius: 50% !important;
    width: 22px !important;
    height: 22px !important;
    font-size: 14px !important;
    cursor: pointer !important;
    display: flex !important;
    align-items: center !important;
    justify-content: center !important;
    line-height: 1 !important;
    transition: all 0.2s ease !important;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.3) !important;
}

.remove-image-btn:hover {
    background: #ff3742 !important;
    transform: scale(1.1) !important;
}

/* Reference image container updates */
.reference-image {
    position: relative;
    min-height: 120px;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    flex-wrap: wrap;
}

.reference-image.has-images {
    justify-content: flex-start;
    align-items: flex-start;
    padding: 10px;
}

/* Form styling */
.form-control {
    background-color: var(--bg-tertiary);
    border: 1px solid var(--border-color);
    color: var(--text-primary);
    border-radius: 6px;
    padding: 12px;
}

.form-control:focus {
    background-color: var(--bg-tertiary);
    border-color: var(--accent-color);
    color: var(--text-primary);
    box-shadow: 0 0 0 0.2rem rgba(255, 183, 3, 0.25);
}

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

/* Loading and error states */
.text-danger {
    color: #ff6b6b !important;
}

/* Button styling improvements */
/* Ensure the "View Full Size" button stays readable on dark UI */
.btn-outline-primary {
    border-color: var(--accent-color) !important;
    color: var(--accent-color) !important;
    background-color: transparent !important;
}

.btn-outline-primary:hover,
.btn-outline-primary:focus {
    background-color: var(--accent-color) !important;
    border-color: var(--accent-color) !important;
    color: #1a1a1a !important;
    box-shadow: 0 0 0 0.2rem rgba(255, 183, 3, 0.25) !important;
}

/* Output single image layout */
#generatedImages.d-flex {
    padding: 0; /* remove extra inner spacing */
}

.output-image-card {
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 16px;
    padding: 18px;
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.35);
    max-width: 900px;
    width: 100%;
}

.output-image-large {
    width: 100%;
    max-height: 65vh; /* keep big but fully visible without scrolling */
    object-fit: contain;
    border-radius: 12px;
}