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

body {
    font-family: Arial, sans-serif;
    background-color: var(--primary-bg-color, black);
    color: var(--primary-text-color, white);
    min-height: 100vh;
    padding: 20px;
}

.container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 30px;
}

h1 {
    color: var(--primary-text-color, white);
    text-align: center;
    margin-bottom: 10px;
    font-size: 2.5em;
}

.description {
    text-align: center;
    color: var(--secondary-text-color, #999);
    margin-bottom: 30px;
    font-size: 1.1em;
}

.controls-section {
    display: flex;
    gap: 20px;
    margin-bottom: 30px;
    flex-wrap: wrap;
}

.control-group {
    flex: 1;
    min-width: 250px;
    background: var(--input-bg-color, #333);
    padding: 20px;
    border-radius: 10px;
    border: 2px solid var(--input-border-color, darkred);
}

.control-group h3 {
    color: var(--header-bg-color, darkred);
    margin-bottom: 15px;
    font-size: 1.2em;
}

.file-input-wrapper {
    position: relative;
    overflow: hidden;
    display: inline-block;
    width: 100%;
}

.file-input-wrapper input[type=file] {
    position: absolute;
    left: -9999px;
}

.file-input-label {
    display: block;
    padding: 12px 20px;
    background: var(--button-bg-color, darkred);
    color: var(--button-text-color, white);
    text-align: center;
    border-radius: 8px;
    cursor: pointer;
    transition: background-color 0.3s;
    font-weight: 500;
}

.file-input-label:hover {
    background: var(--button-hover-bg-color, red);
}

.btn {
    padding: 12px 24px;
    background: var(--button-bg-color, darkred);
    color: var(--button-text-color, white);
    border: none;
    border-radius: 8px;
    cursor: pointer;
    font-size: 1em;
    transition: background-color 0.3s;
    font-weight: 500;
    width: 100%;
    margin-top: 10px;
}

.btn:hover {
    background: var(--button-hover-bg-color, red);
}

.btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

.btn-success {
    background: #1a5f1a;
}

.btn-success:hover {
    background: #228b22;
}

.btn-danger {
    background: #8b0000;
}

.btn-danger:hover {
    background: #a00000;
}

.text-editor {
    margin-top: 15px;
}

.text-editor textarea {
    width: 100%;
    min-height: 120px;
    padding: 12px;
    border: 2px solid var(--input-border-color, darkred);
    border-radius: 8px;
    font-family: Arial, sans-serif;
    font-size: 14px;
    resize: vertical;
    background: var(--input-bg-color, #1a1a1a);
    color: var(--input-text-color, white);
}

.text-editor textarea:focus {
    outline: none;
    box-shadow: var(--input-shadow, 0 0 10px rgba(255, 0, 0, 0.5));
}

.formatting-tools {
    display: flex;
    gap: 10px;
    margin-bottom: 10px;
    flex-wrap: wrap;
}

.formatting-tools select,
.formatting-tools input {
    padding: 8px;
    border: 2px solid var(--input-border-color, darkred);
    border-radius: 6px;
    font-size: 14px;
    background: var(--input-bg-color, #1a1a1a);
    color: var(--input-text-color, white);
}

.formatting-tools select:focus,
.formatting-tools input:focus {
    outline: none;
    box-shadow: var(--input-shadow, 0 0 10px rgba(255, 0, 0, 0.5));
}

.settings-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 15px;
}

.settings-grid label {
    display: block;
    color: var(--primary-text-color, white);
    margin-bottom: 5px;
    font-weight: 500;
}

.settings-grid select,
.settings-grid input {
    width: 100%;
    padding: 10px;
    border: 2px solid var(--input-border-color, darkred);
    border-radius: 6px;
    font-size: 14px;
    background: var(--input-bg-color, #1a1a1a);
    color: var(--input-text-color, white);
}

.settings-grid select:focus,
.settings-grid input:focus {
    outline: none;
    box-shadow: var(--input-shadow, 0 0 10px rgba(255, 0, 0, 0.5));
}

.pages-container {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
    gap: 20px;
    margin-top: 30px;
}

.page-item {
    background: var(--input-bg-color, #1a1a1a);
    border: 3px solid var(--input-border-color, darkred);
    border-radius: 10px;
    padding: 15px;
    cursor: move;
    transition: all 0.3s;
    position: relative;
}

.page-item:hover {
    border-color: var(--button-hover-bg-color, red);
    box-shadow: var(--input-shadow, 0 0 10px rgba(255, 0, 0, 0.5));
}

.page-item.dragging {
    opacity: 0.5;
    transform: scale(0.95);
}

.page-preview {
    width: 100%;
    aspect-ratio: 0.707;
    background: #000;
    border-radius: 5px;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
    margin-bottom: 10px;
    border: 1px solid #555;
}

.page-preview img {
    max-width: 100%;
    max-height: 100%;
    object-fit: contain;
}

.page-preview.text-page {
    padding: 10px;
    font-size: 10px;
    align-items: flex-start;
    justify-content: flex-start;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: pre-wrap;
    word-break: break-word;
}

.page-number {
    background: var(--button-bg-color, darkred);
    color: var(--button-text-color, white);
    padding: 4px 10px;
    border-radius: 15px;
    font-size: 12px;
    font-weight: bold;
    display: inline-block;
    margin-bottom: 8px;
}

.page-type {
    color: var(--secondary-text-color, #999);
    font-size: 12px;
    margin-bottom: 8px;
}

.page-actions {
    display: flex;
    gap: 5px;
}

.page-actions button {
    flex: 1;
    padding: 6px;
    border: none;
    border-radius: 5px;
    cursor: pointer;
    font-size: 12px;
    transition: background-color 0.3s;
}

.page-actions button:hover {
    background: #a00000;
}

.delete-btn {
    background: #8b0000;
    color: white;
}

.empty-state {
    text-align: center;
    padding: 60px 20px;
    color: var(--secondary-text-color, #999);
    grid-column: 1 / -1;
}

.empty-state svg {
    width: 120px;
    height: 120px;
    margin-bottom: 20px;
    opacity: 0.5;
}

.download-section {
    margin-top: 30px;
    text-align: center;
    padding: 20px;
    background: var(--input-bg-color, #1a1a1a);
    border-radius: 10px;
    border: 2px solid var(--input-border-color, darkred);
}

.download-section h3 {
    color: var(--primary-text-color, white);
    margin-bottom: 15px;
}

.download-section .btn {
    width: auto;
    min-width: 250px;
    font-size: 1.2em;
    padding: 15px 40px;
}

/* Light theme support */
[data-theme="light"] .container {
    background: transparent;
}

[data-theme="light"] h1,
[data-theme="light"] .control-group h3,
[data-theme="light"] .settings-grid label,
[data-theme="light"] .download-section h3 {
    color: var(--primary-text-color) !important;
}

[data-theme="light"] .control-group {
    background: white;
    border-color: var(--input-border-color);
}

[data-theme="light"] .page-item {
    background: white;
    border-color: var(--input-border-color);
}

[data-theme="light"] .page-preview {
    background: #f8f9fa;
    border-color: #ddd;
}

[data-theme="light"] .download-section {
    background: white;
}

@media (max-width: 768px) {
    .controls-section {
        flex-direction: column;
    }

    .settings-grid {
        grid-template-columns: 1fr;
    }

    .pages-container {
        grid-template-columns: repeat(auto-fill, minmax(150px, 1fr));
    }

    h1 {
        font-size: 1.8em;
    }

    body {
        padding: 10px;
    }

    .container {
        padding: 15px;
    }
}