:root {
    --bg-color: #f4f4f4;
    --container-bg: #ffffff;
    --text-color: #1a202c;
    --input-bg: #ffffff;
    --input-border: #e2e8f0;
    --button-bg: #2d3748;
    --button-color: #ffffff;
    --button-hover: #4a5568;
    --delete-button-bg: #e53e3e;
    --delete-button-hover: #c53030;
    --note-item-bg: #f8f9fa;
    --note-item-border: #e2e8f0;
    --note-item-hover: #e2e8f0;
    --dropdown-bg: #ffffff;
    --dropdown-border: #ccc;
    --dropdown-hover-bg: #f4f4f4;
}

[data-theme="dark"] {
    --bg-color: #1a202c;
    --container-bg: #2d3748;
    --text-color: #e2e8f0;
    --input-bg: #4a5568;
    --input-border: #718096;
    --button-bg: #718096;
    --button-color: #ffffff;
    --button-hover: #a0aec0;
    --delete-button-bg: #c53030;
    --delete-button-hover: #e53e3e;
    --note-item-bg: #4a5568;
    --note-item-border: #718096;
    --note-item-hover: #718096;
    --dropdown-bg: #2d3748;
    --dropdown-border: #4a5568;
    --dropdown-hover-bg: #4a5568;
}

body {
    font-family: Arial, sans-serif;
    line-height: 1.6;
    margin: 0;
    padding: 0;
    background-color: var(--bg-color);
    color: var(--text-color);
    transition: background-color 0.3s, color 0.3s;
}

.container {
    max-width: 800px;
    margin: 2rem auto;
    padding: 2rem;
    background-color: var(--container-bg);
    border-radius: 8px;
    box-shadow: 0 0 10px rgba(0, 0, 0, 0.1);
}

.header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1.5rem;
}

h1, h2 {
    color: var(--text-color);
}

h1 {
    font-size: 2.5rem;
    margin: 0;
}

h2 {
    font-size: 1.8rem;
    margin-top: 2rem;
}

input[type="text"],
textarea {
    width: 100%;
    padding: 0.75rem;
    margin-bottom: 1rem;
    border: 1px solid var(--input-border);
    border-radius: 6px;
    font-size: 1rem;
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.1);
    background-color: var(--input-bg);
    color: var(--text-color);
}

textarea {
    height: 200px;
    resize: vertical;
}

.button-group {
    display: flex;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: 0.5rem;
    margin-bottom: 2rem;
}

button {
    padding: 0.75rem 1rem;
    border: none;
    border-radius: 6px;
    background-color: var(--button-bg);
    color: var(--button-color);
    cursor: pointer;
    transition: background-color 0.3s;
    font-size: 0.9rem;
    display: flex;
    align-items: center;
    justify-content: center;
}

button:hover {
    background-color: var(--button-hover);
}

button i {
    margin-right: 0.5rem;
}

#noteList {
    list-style-type: none;
    padding: 0;
}

#noteList li {
    background-color: var(--note-item-bg);
    border: 1px solid var(--note-item-border);
    border-radius: 6px;
    padding: 1rem;
    margin-bottom: 1rem;
    transition: background-color 0.3s;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

#noteList li:hover {
    background-color: var(--note-item-hover);
}

.note-content {
    flex-grow: 1;
    cursor: pointer;
}

.delete-button {
    background-color: var(--delete-button-bg);
    color: white;
    border: none;
    padding: 0.5rem;
    border-radius: 4px;
    cursor: pointer;
    transition: background-color 0.3s;
}

.delete-button:hover {
    background-color: var(--delete-button-hover);
}

.hidden {
    display: none;
}

#imageContainer {
    background-color: var(--container-bg);
    padding: 2rem;
    border-radius: 8px;
    box-shadow: 0 0 10px rgba(0, 0, 0, 0.1);
    max-width: 600px;
    margin: 2rem auto;
}

#imageTitlePreview {
    font-size: 2rem;
    color: var(--text-color);
    margin-bottom: 1rem;
}

#imageContentPreview {
    font-size: 1rem;
    color: var(--text-color);
    white-space: pre-wrap;
}

#imageDatePreview {
    font-size: 0.9rem;
    color: var(--text-color);
    opacity: 0.7;
    margin-top: 1rem;
}

.theme-toggle {
    background: none;
    border: none;
    color: var(--text-color);
    font-size: 1.5rem;
    cursor: pointer;
    padding: 0.5rem;
}

.dropdown {
    position: relative;
}

.dropdown-toggle {
    background-color: var(--button-bg);
    color: var(--button-color);
    padding: 0.75rem 1rem;
    border-radius: 6px;
    cursor: pointer;
    border: none;
    transition: background-color 0.3s;
    font-size: 0.9rem;
    display: flex;
    align-items: center;
    justify-content: center;
}

.dropdown-toggle:hover {
    background-color: var(--button-hover);
}

.dropdown-content {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    background-color: var(--dropdown-bg);
    min-width: 150px;
    border-radius: 6px;
    box-shadow: 0 8px 16px rgba(0, 0, 0, 0.1);
    z-index: 1;
    flex-direction: column;
    padding: 0.5rem 0;
    border: 1px solid var(--dropdown-border);
}

.dropdown-content button {
    padding: 0.75rem 1rem;
    background: none;
    border: none;
    color: var(--text-color);
    text-align: left;
    width: 100%;
    cursor: pointer;
    transition: background-color 0.3s;
}

.dropdown-content button:hover {
    background-color: var(--dropdown-hover-bg);
}

.dropdown:hover .dropdown-content {
    display: flex;
}

@media (max-width: 600px) {
    .button-group {
        flex-direction: column;
    }
    
    button {
        width: 100%;
    }
}

/* ... Existing CSS ... */

.dropdown {
    position: relative;
}

.dropdown-toggle {
    background-color: var(--button-bg);
    color: var(--button-color);
    padding: 0.75rem 1rem;
    border-radius: 6px;
    cursor: pointer;
    border: none;
    transition: background-color 0.3s;
    font-size: 0.9rem;
    display: flex;
    align-items: center;
    justify-content: center;
}

.dropdown-toggle:hover {
    background-color: var(--button-hover);
}

.dropdown-content {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    background-color: var(--dropdown-bg);
    min-width: 150px;
    border-radius: 6px;
    box-shadow: 0 8px 16px rgba(0, 0, 0, 0.1);
    z-index: 1;
    flex-direction: column;
    padding: 0.5rem 0;
    border: 1px solid var(--dropdown-border);
}

.dropdown-content button,
.dropdown-content a {
    padding: 0.75rem 1rem;
    background: none;
    border: none;
    color: var(--text-color);
    text-align: left;
    width: 100%;
    cursor: pointer;
    transition: background-color 0.3s;
    text-decoration: none;
}

.dropdown-content button:hover,
.dropdown-content a:hover {
    background-color: var(--dropdown-hover-bg);
}

.dropdown:hover .dropdown-content {
    display: flex;
    flex-direction: column;
}

@media (max-width: 600px) {
    .button-group {
        flex-direction: column;
    }
    
    button {
        width: 100%;
    }
}