:root {
    --primary-color: #595aff; /* Mastodon Blurple */
    --primary-hover: #4546d1;
    --bg-color: #f5f5f5;
    --card-bg: #ffffff;
    --text-color: #333333;
    --text-muted: #666666;
    --border-color: #dddddd;
    --success-color: #28a745;
    --error-color: #dc3545;
}

[data-theme="dark"] {
    --primary-color: #6c6dff;
    --primary-hover: #8384ff;
    --bg-color: #1a1a1a;
    --card-bg: #2d2d2d;
    --text-color: #e0e0e0;
    --text-muted: #a0a0a0;
    --border-color: #444444;
}

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

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
    background-color: var(--bg-color);
    color: var(--text-color);
    line-height: 1.6;
}

.container {
    max-width: 1000px;
    margin: 0 auto;
    padding: 0 20px;
}

header {
    background-color: var(--primary-color);
    color: white;
    padding: 40px 0;
    margin-bottom: 30px;
}

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

#theme-toggle {
    background: rgba(255, 255, 255, 0.2);
    color: white;
    border: 1px solid rgba(255, 255, 255, 0.3);
    border-radius: 50%;
    width: 44px;
    height: 44px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.2rem;
    padding: 0;
    cursor: pointer;
}

#theme-toggle:hover {
    background: rgba(255, 255, 255, 0.3);
}

.header-container h1 {
    font-size: 2.5rem;
    margin-bottom: 10px;
}

main {
    min-height: 60vh;
}

h2 {
    margin-bottom: 15px;
    font-size: 1.5rem;
}

section {
    margin-bottom: 40px;
    background: var(--card-bg);
    padding: 25px;
    border-radius: 8px;
    box-shadow: 0 2px 4px rgba(0,0,0,0.05);
}

form, .search-bar {
    display: flex;
    gap: 10px;
}

.vertical-form {
    display: flex;
    flex-direction: column;
    gap: 15px;
}

.form-group {
    display: flex;
    flex-direction: column;
    gap: 5px;
}

.form-group label {
    font-weight: 500;
    font-size: 0.95rem;
}

textarea {
    padding: 12px 15px;
    border: 1px solid var(--border-color);
    border-radius: 4px;
    font-size: 1rem;
    background: var(--card-bg);
    color: var(--text-color);
    font-family: inherit;
    resize: vertical;
}

textarea:focus {
    outline: none;
    border-color: var(--primary-color);
}

input[type="url"], input[type="text"] {
    flex: 1;
    padding: 12px 15px;
    border: 1px solid var(--border-color);
    border-radius: 4px;
    font-size: 1rem;
    background: var(--card-bg);
    color: var(--text-color);
}

input:focus {
    outline: none;
    border-color: var(--primary-color);
}

button {
    background-color: var(--primary-color);
    color: white;
    border: none;
    padding: 12px 20px;
    border-radius: 4px;
    font-size: 1rem;
    cursor: pointer;
    transition: background-color 0.2s;
}

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

button:disabled {
    background-color: var(--text-muted);
    cursor: not-allowed;
}

.message {
    margin-top: 10px;
    font-size: 0.95rem;
}
.message.success { color: var(--success-color); }
.message.error { color: var(--error-color); }

.hidden {
    display: none !important;
}

.grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 20px;
}

.collection-card {
    border: 1px solid var(--border-color);
    border-radius: 6px;
    padding: 20px;
    background: var(--card-bg);
    display: flex;
    flex-direction: column;
}

.collection-card h3 {
    font-size: 1.2rem;
    margin-bottom: 10px;
    color: var(--primary-color);
}

.collection-card h3 a {
    color: inherit;
    text-decoration: none;
}

.collection-card h3 a:hover {
    text-decoration: underline;
}

.collection-meta {
    font-size: 0.85rem;
    color: var(--text-muted);
    margin-bottom: 10px;
    display: flex;
    gap: 15px;
}

.collection-tag {
    background-color: var(--border-color);
    padding: 2px 8px;
    border-radius: 12px;
    font-weight: 500;
}

.collection-desc {
    font-size: 0.95rem;
    margin-bottom: 15px;
    flex-grow: 1;
}

.collection-desc p {
    margin-bottom: 0;
}

.collection-footer {
    border-top: 1px solid var(--border-color);
    padding-top: 15px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 0.85rem;
}

.collection-footer a {
    color: var(--primary-color);
    text-decoration: none;
    font-weight: 500;
}

.collection-footer a:hover {
    text-decoration: underline;
}

.collection-instance {
    color: var(--text-muted);
}

#loading, #empty-state {
    text-align: center;
    padding: 40px;
    color: var(--text-muted);
    font-size: 1.1rem;
}

footer {
    text-align: center;
    padding: 30px 0;
    color: var(--text-muted);
    border-top: 1px solid var(--border-color);
    margin-top: 40px;
}

footer a {
    color: var(--primary-color);
    text-decoration: none;
}

footer a:hover {
    text-decoration: underline;
}