@import url('https://fonts.googleapis.com/css2?family=Noto+Sans+JP:wght@400;700&display=swap');

:root {
    --primary-color: #27AE60;
    --background-color: #FFFFFF;
    --accent-color: #F4F9F4;
    --text-color: #2C3E50;
    --heading-color: #000000;
    --font-family: 'Noto Sans JP', 'Helvetica Neue', Helvetica, Arial, sans-serif;
}

body {
    font-family: var(--font-family);
    margin: 0;
    padding: 0;
    background-color: var(--background-color);
    color: var(--text-color);
    line-height: 1.6;
}

header {
    background-color: var(--background-color);
    border-bottom: 2px solid var(--accent-color);
    padding: 1rem;
}

.header-container {
    max-width: 1400px;
    margin: 0 auto;
    width: 100%;
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.header-top {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.header-bottom {
    display: flex;
    justify-content: flex-start;
}

.header-actions {
    display: flex;
    gap: 1.5rem;
    align-items: center;
    flex-wrap: wrap;
}

.button-group {
    display: flex;
    gap: 0.5rem;
    align-items: center;
}

.header-nav {
    display: flex;
    gap: 1.5rem;
    align-items: center;
}

.header-nav a {
    text-decoration: none;
    color: var(--text-color);
    font-size: 0.9rem;
    font-weight: 500;
}

.header-nav a:hover {
    color: var(--primary-color);
}

.color-picker-container {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.9rem;
    margin-right: 0.5rem;
}

header h1 {
    font-size: 1.5rem;
    margin: 0;
    color: var(--primary-color);
}

.header-actions {
    display: flex;
    gap: 0.5rem;
    align-items: center;
}

.mode-selector, .aspect-ratio-selector, .color-picker-container {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.9rem;
}

#app-mode, #aspect-ratio {
    padding: 0.3rem;
    border: 1px solid #ddd;
    border-radius: 4px;
    background-color: white;
    cursor: pointer;
}

#heading-color {
    width: 30px;
    height: 30px;
    border: none;
    background: none;
    cursor: pointer;
    padding: 0;
}

.btn-primary {
    background-color: var(--primary-color);
    color: white;
    border: none;
    padding: 0.5rem 1rem;
    font-size: 1rem;
    border-radius: 4px;
    cursor: pointer;
    transition: background-color 0.3s ease;
}

.btn-primary:hover {
    background-color: #1e8449;
}

.btn-secondary {
    background-color: transparent;
    color: var(--primary-color);
    border: 1px solid var(--primary-color);
    padding: 0.5rem 1rem;
    font-size: 1rem;
    border-radius: 4px;
    cursor: pointer;
    transition: all 0.3s ease;
}

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

.editor-container.drag-over {
    border: 2px dashed var(--primary-color);
    background-color: #e8f6ed;
}

main {
    display: flex;
    height: calc(100vh - 120px); /* Adjust based on header/footer height */
    padding: 1rem;
    gap: 1rem;
}

.editor-container, .preview-container {
    flex: 1;
    overflow-y: auto;
    border: 1px solid #ddd;
    border-radius: 4px;
    padding: 1rem;
    background-color: var(--accent-color);
}

.editor-container {
    display: flex;
    flex-direction: column;
    overflow-y: hidden;
}

.editor-hint {
    background-color: #fff;
    border: 1px solid #e0e0e0;
    padding: 0.5rem 0.8rem;
    margin-bottom: 0.5rem;
    border-radius: 4px;
    font-size: 0.85rem;
    color: #666;
    flex-shrink: 0;
}

.editor-hint code {
    background-color: #f5f5f5;
    padding: 1px 4px;
    border-radius: 3px;
    color: var(--primary-color);
}

.preview-container {
    background-color: white; /* Preview should be white like paper */
}

textarea {
    width: 100%;
    height: 100%;
    border: none;
    resize: none;
    font-family: monospace;
    font-size: 1rem;
    background-color: transparent;
    outline: none;
}

.preview-container {
    background-color: white; /* Preview should be white like paper */
}

/* Markdown Styles in Preview */
.preview-container h1, .preview-container h2, .preview-container h3 {
    color: var(--heading-color);
    border-bottom: 1px solid #eee;
    padding-bottom: 0.5rem;
}

.preview-container code {
    background-color: #f0f0f0;
    padding: 0.2rem 0.4rem;
    border-radius: 3px;
    font-family: monospace;
}

.preview-container pre {
    background-color: #f8f8f8;
    padding: 1rem;
    border-radius: 4px;
    overflow-x: auto;
}

/* Slide Preview Styles */
.slide-preview {
    background-color: #fff;
    border: 1px solid #ccc;
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
    margin-bottom: 2rem;
    padding: 0 2rem 1rem 2rem;
    position: relative;
    display: flex;
    flex-direction: column;
    justify-content: flex-start;
    margin-left: auto;
    margin-right: auto;
    overflow: hidden;
    transition: all 0.3s ease;
}

.preview-container.mode-slide .slide-preview {
    width: 100%;
    max-width: 800px;
}

.preview-container.ratio-16-9 .slide-preview {
    aspect-ratio: 16 / 9;
}

.preview-container.ratio-4-3 .slide-preview {
    aspect-ratio: 4 / 3;
}

.slide-content h1, .slide-content h2, .slide-content h3 {
    margin-top: 0;
    padding-top: 0.5rem;
}

.slide-content {
    flex: 1;
}

.slide-number {
    position: absolute;
    bottom: 10px;
    right: 15px;
    font-size: 0.8rem;
    color: #999;
}

.slide-separator {
    border: none;
    border-top: 2px dashed #eee;
    margin: 2rem 0;
}

footer {
    background-color: var(--accent-color);
    text-align: center;
    padding: 1.5rem;
    border-top: 1px solid #ddd;
}

.footer-info {
    display: flex;
    justify-content: center;
    gap: 2rem;
    margin-bottom: 0.5rem;
    font-size: 0.9rem;
    color: var(--text-color);
}

.disclaimer {
    font-size: 0.8rem;
    color: #7f8c8d;
    margin-top: 0.5rem;
}

/* Responsive Design */
@media screen and (max-width: 768px) {
    main {
        flex-direction: column;
        height: auto;
    }
    
    .editor-container, .preview-container {
        height: 50vh;
    }
}