:root {
    --bg-color: #f4f4f9;
    --card-bg: #ffffff;
    --text-color: #333;
    --primary-color: #007bff;
    --danger-color: #dc3545;
    --border-color: #ddd;
    --font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
}

* {
    box-sizing: border-box;
}

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

#app {
    display: flex;
    flex-direction: column;
    height: 100vh;
}

/* Editor Styles */
.editor-container {
    max-width: 800px;
    margin: 0 auto;
    padding: 20px;
    width: 100%;
    flex: 1;
    display: flex;
    flex-direction: column;
}

.editor-header {
    display: flex;
    flex-direction: column;
    gap: 10px;
    margin-bottom: 20px;
    position: sticky;
    top: 0;
    background-color: var(--bg-color);
    z-index: 10;
    padding: 10px 0;
    border-bottom: 1px solid var(--border-color);
}

.toolbar-row {
    display: flex;
    justify-content: space-between;
    align-items: center;
    width: 100%;
}

.editor-header h1 {
    margin: 0;
    font-size: 1.5rem;
}

.controls {
    display: flex;
    gap: 10px;
    align-items: center;
}

.slide-list {
    display: flex;
    flex-direction: column;
    gap: 15px;
    padding-bottom: 80px; /* Space for FAB or just scrolling */
}

.slide-card {
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: 15px;
    display: flex;
    flex-direction: column;
    gap: 10px;
    box-shadow: 0 2px 4px rgba(0,0,0,0.05);
    transition: transform 0.2s, box-shadow 0.2s;
    position: relative;
}

.slide-card.dragging {
    opacity: 0.5;
    border: 2px dashed var(--primary-color);
}

.slide-card.drop-target {
    border: 2px solid var(--primary-color);
    box-shadow: 0 0 10px rgba(0,123,255,0.3);
    transform: scale(1.02);
}

.card-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    color: #888;
    font-size: 0.9rem;
    cursor: grab;
    user-select: none;
    padding-bottom: 5px;
    border-bottom: 1px solid #eee;
    margin-bottom: 5px;
}

.card-header:active {
    cursor: grabbing;
}

.slide-input {
    width: 100%;
    min-height: 100px;
    padding: 10px;
    border: 1px solid var(--border-color);
    border-radius: 4px;
    font-family: monospace;
    font-size: 1rem;
    resize: vertical;
}

.btn {
    padding: 8px 16px;
    border: none;
    border-radius: 4px;
    cursor: pointer;
    font-weight: 600;
    font-size: 0.9rem;
    transition: background-color 0.2s;
}

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

.btn-primary:hover {
    background-color: #0056b3;
}

.btn-danger {
    background-color: transparent;
    color: var(--danger-color);
    border: 1px solid var(--danger-color);
    padding: 4px 8px;
    font-size: 0.8rem;
}

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

.btn-secondary {
    background-color: #6c757d;
    color: white;
}

.btn-secondary:hover {
    background-color: #545b62;
}

.add-slide-btn {
    margin-top: 20px;
    width: 100%;
    padding: 15px;
    background-color: white;
    border: 2px dashed var(--border-color);
    color: #888;
    font-size: 1rem;
    cursor: pointer;
}

.add-slide-btn:hover {
    border-color: var(--primary-color);
    color: var(--primary-color);
}

/* Player Styles */
.player-container {
    position: fixed;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    background-color: white;
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 1000;
    padding: 40px;
    overflow: hidden;
    font-family: 'Inter var', 'Inter', sans-serif;
    font-feature-settings: "ss02" 1;
}

.slide-content {
    max-width: 90vw;
    max-height: 90vh;
    font-size: 2rem; /* Fallback base size */
    line-height: 1.5;
    overflow-y: auto;
    width: 100%;
    text-align: center;
}

/* Markdown Styles in Player */
.slide-content h1 { font-size: 2.5em; margin-bottom: 0.5em; }
.slide-content h2 { font-size: 2em; margin-bottom: 0.5em; }
.slide-content h3 { font-size: 1.75em; margin-bottom: 0.5em; }
.slide-content p { margin-bottom: 1em; }
.slide-content ul, .slide-content ol { margin-bottom: 1em; padding-left: 1.5em; }
.slide-content pre {
    background: #f4f4f4;
    padding: 1em;
    border-radius: 5px;
    overflow-x: auto;
    font-size: 0.6em; /* Code blocks smaller */
}
.slide-content img {
    max-width: 100%;
    height: auto;
    display: block;
    margin: 0 auto;
}
.slide-content blockquote {
    border-left: 5px solid #ccc;
    padding-left: 1em;
    color: #666;
    font-style: italic;
}

.hint-overlay {
    position: absolute;
    bottom: 20px;
    right: 20px;
    color: #ccc;
    font-size: 0.8rem;
    pointer-events: none;
}