:root {
    --primary: #3369ff;
    --bg-dark: #14191e;
    --bg-card: #242d36;
    --bg-darker: #14416d;
    --text-primary: #fff;
    --text-secondary: #84a4ff;
    --border: #1d252c;
    --error: #ef4444;
    --success: #64ffda;
}

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

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    background: var(--bg-dark);
    color: var(--text-primary);
    line-height: 1.6;
    min-height: 100vh;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 20px;
}

header {
    text-align: center;
    margin-bottom: 3rem;
}

header h1 {
    font-size: 3rem;
    font-weight: 700;
    margin-bottom: 0.5rem;
    color: var(--primary);
}

header p {
    color: var(--text-secondary);
    font-size: 1.2rem;
}

.card {
    background: var(--bg-card);
    border-radius: 12px;
    padding: 1rem;
    margin-bottom: 1rem;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.5);
    border: 1px solid var(--border);
    animation: fadeIn 0.5s ease-out;
}

.card-header {
    cursor: pointer;
    display: flex;
    justify-content: space-between;
    align-items: center;
    border-bottom: 1px solid var(--border);
    transition: background-color 0.3s ease;
}

.card-header:hover {
    background-color: rgba(255, 255, 255, 0.05);
}

.collapse-icon {
    font-size: 1.2rem;
    font-weight: bold;
    color: var(--primary);
    transition: transform 0.3s ease;
}

.card-content {
    padding: 2rem;
    transition: max-height 0.3s ease, opacity 0.3s ease;
    overflow: hidden;
}

.card-content.collapsed {
    max-height: 0;
    padding-top: 0;
    padding-bottom: 0;
    opacity: 0;
}

.card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: var(--primary);
    opacity: 0.8;
}

.card h2 {
    color: var(--text-primary);
    font-size: 1.8rem;
    font-weight: 600;
}

.form-group {
    margin-bottom: 1.5rem;
}

.form-group label {
    display: block;
    font-weight: 500;
    margin-bottom: 0.5rem;
    color: var(--text-secondary);
    text-transform: uppercase;
    font-size: 0.875rem;
    letter-spacing: 0.5px;
}

.form-group input,
.form-group select {
    width: 100%;
    padding: 0.875rem;
    border: 2px solid var(--border);
    border-radius: 8px;
    font-size: 1rem;
    background: var(--bg-darker);
    color: var(--text-primary);
    transition: all 0.3s ease;
}

.form-group input:focus,
.form-group select:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 4px rgba(51, 105, 255, 0.1);
}

.form-group small {
    display: block;
    margin-top: 0.5rem;
    color: var(--text-secondary);
    font-size: 0.875rem;
}

.btn {
    padding: 0.875rem 2rem;
    border: none;
    border-radius: 8px;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    position: relative;
    overflow: hidden;
}


.btn-primary {
    background: var(--primary);
    color: white;
    box-shadow: 0 4px 15px rgba(51, 105, 255, 0.3);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(51, 105, 255, 0.4);
}

.btn-success {
    background: #225cff;
    color: white;
    box-shadow: 0 4px 15px rgba(34, 92, 255, 0.3);
}

.btn-success:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(100, 255, 218, 0.4);
}

.btn-secondary {
    background: transparent;
    color: var(--primary);
    border: 2px solid var(--primary);
}

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

.btn-small {
    padding: 0.5rem 1rem;
    font-size: 0.875rem;
}

.toolbar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1rem;
}

.preview-tabs {
    display: flex;
    gap: 0;
    border-radius: 8px;
    overflow: hidden;
    border: 1px solid var(--border);
}

.tab-btn {
    background: var(--bg-darker);
    color: var(--text-secondary);
    border: none;
    padding: 0.5rem 1rem;
    cursor: pointer;
    font-size: 0.875rem;
    font-weight: 500;
    transition: all 0.3s ease;
    border-right: 1px solid var(--border);
}

.tab-btn:last-child {
    border-right: none;
}

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

.tab-btn:hover:not(.active) {
    background: var(--bg-card);
    color: var(--text-primary);
}

.toolbar-actions {
    display: flex;
    gap: 0.5rem;
}

.hidden {
    display: none !important;
}

.loading {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(6, 8, 24, 0.95);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    z-index: 1000;
    backdrop-filter: blur(5px);
}

.spinner {
    width: 60px;
    height: 60px;
    border: 3px solid rgba(51, 105, 255, 0.2);
    border-top-color: var(--primary);
    border-radius: 50%;
    animation: spin 1s linear infinite;
    margin-bottom: 1.5rem;
    box-shadow: 0 0 20px rgba(51, 105, 255, 0.5);
}

@keyframes spin {
    to { transform: rotate(360deg); }
}

.loading p {
    color: var(--primary);
    font-size: 1.2rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 1px;
}

.release-content {
    background: var(--bg-darker);
    padding: 1.5rem;
    border-radius: 8px;
    border: 1px solid var(--border);
    overflow-y: auto;
    font-size: 0.9rem;
}

#releaseNotesRaw {
    font-family: 'Fira Code', 'Monaco', 'Courier New', monospace;
    white-space: pre-wrap;
    color: var(--text-secondary);
}

.release-content::-webkit-scrollbar {
    width: 8px;
}

.release-content::-webkit-scrollbar-track {
    background: var(--bg-darker);
}

.release-content::-webkit-scrollbar-thumb {
    background: var(--border);
    border-radius: 4px;
}

.release-content::-webkit-scrollbar-thumb:hover {
    background: var(--primary);
}

/* Markdown Preview Styles */
.markdown-preview {
    background: white;
    color: #333;
    line-height: 1.7;
    border-radius: 8px;
    border: 1px solid var(--border);
}

.markdown-preview h1, .markdown-preview h2, .markdown-preview h3,
.markdown-preview h4, .markdown-preview h5, .markdown-preview h6 {
    color: #333;
    margin-top: 1.5rem;
    margin-bottom: 1rem;
    font-weight: 600;
}

.markdown-preview h1 {
    font-size: 2rem;
    border-bottom: 2px solid #ddd;
    padding-bottom: 0.5rem;
}

.markdown-preview h2 {
    font-size: 1.5rem;
    border-bottom: 1px solid #ddd;
    padding-bottom: 0.3rem;
}

.markdown-preview h3 { font-size: 1.25rem; }
.markdown-preview h4 { font-size: 1.1rem; }

.markdown-preview p,
.markdown-preview li {
    color: #333;
}

.markdown-preview p { margin-bottom: 1rem; }

.markdown-preview ul, .markdown-preview ol {
    margin-left: 2rem;
    margin-bottom: 1rem;
}

.markdown-preview li { margin-bottom: 0.5rem; }

.markdown-preview table {
    border-collapse: collapse;
    width: 100%;
    margin-bottom: 1rem;
    border: 1px solid #ddd;
    border-radius: 8px;
    overflow: hidden;
}

.markdown-preview th, .markdown-preview td {
    padding: 0.75rem;
    text-align: left;
    border-bottom: 1px solid #ddd;
    color: #333;
}

.markdown-preview th {
    background-color: #f8f9fa;
    font-weight: 600;
}

.markdown-preview tbody tr:nth-child(even) { background-color: #f8f9fa; }
.markdown-preview tbody tr:hover { background-color: #e3f2fd; }

.markdown-preview a {
    color: var(--primary);
    text-decoration: none;
    border-bottom: 1px dotted var(--primary);
    transition: color 0.3s ease;
}

.markdown-preview a:hover {
    color: var(--success);
    border-bottom-color: var(--success);
}

.markdown-preview code {
    background-color: #f5f5f5;
    padding: 0.2rem 0.5rem;
    border-radius: 4px;
    color: #d73a49;
    font-family: 'Fira Code', 'Monaco', 'Courier New', monospace;
    font-size: 0.875rem;
}

.markdown-preview pre {
    background-color: #f6f8fa;
    padding: 1rem;
    border-radius: 8px;
    border: 1px solid #ddd;
    overflow-x: auto;
    margin-bottom: 1rem;
}

.markdown-preview pre code {
    background: none;
    padding: 0;
    color: #333;
}

.markdown-preview blockquote {
    border-left: 4px solid var(--primary);
    padding: 0.5rem 1rem;
    margin: 1rem 0;
    color: #666;
    font-style: italic;
    background-color: #f9f9f9;
    border-radius: 4px;
}

.markdown-preview strong {
    color: #333;
    font-weight: 600;
}

.markdown-preview em {
    color: #666;
    font-style: italic;
}

.markdown-preview details {
    background-color: #f8f9fa;
    border: 1px solid #ddd;
    border-radius: 8px;
    padding: 0.5rem;
    margin-bottom: 1rem;
}

.markdown-preview summary {
    cursor: pointer;
    font-weight: 600;
    color: var(--primary);
    padding: 0.5rem;
    border-radius: 4px;
    transition: background-color 0.3s ease;
}

.markdown-preview summary:hover { background-color: #e9ecef; }

.markdown-preview details[open] summary {
    margin-bottom: 0.5rem;
    border-bottom: 1px solid #ddd;
}

.markdown-preview details p, .markdown-preview details li { color: #333; }

.url-mapping {
    display: flex;
    gap: 0.5rem;
    align-items: center;
    margin-bottom: 0.75rem;
}

.url-mapping label {
    min-width: 200px;
    font-weight: 500;
    color: var(--text-secondary);
}

.url-mapping input { flex: 1; }

#chartDetails {
    background: var(--bg-darker);
    padding: 1rem;
    border-radius: 8px;
    margin-bottom: 1.5rem;
    border: 1px solid var(--border);
}

#chartDetails p {
    color: var(--text-primary);
    margin-bottom: 0.5rem;
}

#chartDetails strong { color: var(--text-secondary); }

.error {
    background: rgba(239, 68, 68, 0.1);
    border: 1px solid var(--error);
    color: #FCA5A5;
    padding: 1rem;
    border-radius: 8px;
    margin-bottom: 1rem;
}

.success {
    background: rgba(100, 255, 218, 0.1);
    border: 1px solid var(--success);
    color: var(--success);
    padding: 1rem;
    border-radius: 8px;
    margin-bottom: 1rem;
}

@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* Link Styles */
a {
    color: var(--primary);
    text-decoration: none;
    transition: color 0.3s ease;
}

a:hover { color: var(--success); }

/* Auth Card Styles */
#authCard {
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 400px;
}

#authCard > div {
    text-align: center;
}

#authCard .btn-primary {
    font-size: 18px;
    padding: 16px 32px;
}

#authStatus {
    margin-top: 20px;
}

/* Repository Selection Styles */
.divider-text {
    text-align: center;
    margin: 1.5rem 0;
    position: relative;
}

.divider-text::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 0;
    right: 0;
    height: 1px;
    background: var(--border);
}

.divider-text span {
    background: var(--bg-card);
    padding: 0 1rem;
    color: var(--text-secondary);
    font-size: 0.875rem;
    font-weight: 600;
    position: relative;
}

#repoSelect,
#sourceTag,
#targetTag {
    background-image: url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' fill='none' viewBox='0 0 20 20'%3e%3cpath stroke='%236b7280' stroke-linecap='round' stroke-linejoin='round' stroke-width='1.5' d='m6 8 4 4 4-4'/%3e%3c/svg%3e");
    background-position: right 0.5rem center;
    background-repeat: no-repeat;
    background-size: 1.5em 1.5em;
    padding-right: 2.5rem;
}

#repoSelect { appearance: none; }

#repoSelect option {
    background: var(--bg-card);
    color: var(--text-primary);
}

#sourceTag:focus,
#targetTag:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(51, 105, 255, 0.1);
}

datalist {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 4px;
}

datalist option {
    background: var(--bg-card);
    color: var(--text-primary);
    padding: 0.5rem;
}

datalist option:hover { background: var(--bg-darker); }

/* Responsive */
@media (max-width: 768px) {
    header h1 {
        font-size: 2rem;
    }

    .container {
        padding: 15px;
    }

    .card {
        padding: 1.5rem;
    }

    .modal-content {
        width: 95%;
        margin: 20px;
    }

    .modal-footer {
        flex-direction: column;
    }

    .modal-footer .btn {
        width: 100%;
    }
}

/* Footer */
footer {
    margin-top: 3rem;
    padding: 2rem 0;
    border-top: 1px solid var(--border);
    text-align: center;
}

footer p {
    color: var(--text-secondary);
    font-size: 0.9rem;
    margin: 0;
}

footer #appVersion {
    color: var(--primary);
    font-weight: 500;
}