:root {
    --primary-color: #2563eb;
    --primary-hover: #1d4ed8;
    --bg-color: #f8fafc;
    --surface-color: #ffffff;
    --text-color: #1e293b;
    --text-secondary: #64748b;
    --border-color: #e2e8f0;
    --success-color: #10b981;
    --warning-color: #f59e0b;
    --danger-color: #ef4444;
    --radius: 8px;
    --shadow: 0 1px 3px 0 rgb(0 0 0 / 0.1), 0 1px 2px -1px rgb(0 0 0 / 0.1);
}

* {
    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;
    -webkit-font-smoothing: antialiased;
}

p {
    margin-bottom: .7rem;
}

.app-bar {
    background-color: var(--surface-color);
    border-bottom: 1px solid var(--border-color);
    position: sticky;
    top: 0;
    z-index: 10;
}

.app-bar-content {
    max-width: 800px;
    padding: 1rem;
    margin: 0 auto;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.app-title {
    margin-left: 0.8rem;
    font-size: 1.25rem;
    font-weight: 600;
}

.container {
    max-width: 800px;
    margin: 0 auto;
    padding: 2rem 1rem;
}

.intro {
    margin-bottom: 2rem;
}

.helper-text {
    font-size: 0.875rem;
    color: var(--text-secondary);
    margin-top: 0.5rem;
}

.search-section {
    margin-bottom: 2rem;
}

.input-group {
    display: flex;
    gap: 0.5rem;
}

#domain-input {
    flex: 1;
    padding: 0.75rem 1rem;
    font-size: 1.125rem;
    border: 1px solid var(--border-color);
    border-radius: var(--radius);
    outline: none;
    transition: border-color 0.2s;
}

#domain-input:focus {
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
}

#domain-input.error {
    border-color: var(--danger-color);
}

#search-btn {
    padding: 0 1.5rem;
    background-color: var(--primary-color);
    color: white;
    border: none;
    border-radius: var(--radius);
    font-weight: 600;
    cursor: pointer;
    transition: background-color 0.2s;
}

#search-btn:hover:not(:disabled) {
    background-color: var(--primary-hover);
}

#search-btn:disabled {
    opacity: 0.6;
    cursor: not-allowed;
}

#stop-btn {
    padding: 0 1.5rem;
    background-color: var(--danger-color);
    color: white;
    border: none;
    border-radius: var(--radius);
    font-weight: 600;
    cursor: pointer;
    transition: background-color 0.2s;
}

#stop-btn:hover {
    background-color: #dc2626;
}

.error-message {
    color: var(--danger-color);
    font-size: 0.875rem;
    margin-top: 0.5rem;
}

.hidden {
    display: none !important;
}

/* Progress */
.progress-bar-container {
    height: 6px;
    background-color: var(--border-color);
    border-radius: 3px;
    overflow: hidden;
    margin-bottom: 0.5rem;
}

.progress-bar {
    height: 100%;
    background-color: var(--primary-color);
    width: 0%;
    transition: width 0.2s;
}

.progress-status {
    display: flex;
    justify-content: space-between;
    font-size: 0.875rem;
    color: var(--text-secondary);
}

/* Results */
details.results-group > summary {
    list-style: none;
    cursor: pointer;
}

details.results-group > summary::-webkit-details-marker {
    display: none;
}

details.results-group > summary::before {
    content: '▶';
    font-size: 0.75rem;
    display: inline-block;
    margin-right: 0.5rem;
    transition: transform 0.2s;
}

details.results-group[open] > summary::before {
    transform: rotate(90deg);
}

.results-group {
    margin-bottom: 2rem;
}

.group-title {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    margin-bottom: 1rem;
    font-size: 1rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--text-secondary);
}

.count-badge {
    background-color: var(--border-color);
    padding: 0.125rem 0.5rem;
    border-radius: 1rem;
    font-size: 0.75rem;
    color: var(--text-color);
}

.domain-list {
    list-style: none;
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
    gap: 0.75rem;
}

.domain-item {
    background-color: var(--surface-color);
    border: 1px solid var(--border-color);
    padding: 0.75rem;
    border-radius: var(--radius);
    display: flex;
    justify-content: space-between;
    align-items: center;
    transition: transform 0.2s, box-shadow 0.2s;
}

.domain-item:hover {
    transform: translateY(-1px);
    box-shadow: var(--shadow);
}

.domain-link {
    text-decoration: none;
    color: var(--text-color);
    font-weight: 500;
    word-break: break-word;
    overflow-wrap: anywhere;
}

.domain-name {
    word-break: break-word;
    overflow-wrap: anywhere;
}

.domain-link:hover {
    color: var(--primary-color);
}

.icon-check {
    color: var(--success-color);
    font-weight: bold;
}

.icon-cross {
    color: var(--danger-color);
    font-weight: bold;
}

.registrar-promo {
    background-color: var(--surface-color);
    padding: 1rem;
    border-radius: var(--radius);
    border: 1px solid var(--border-color);
    text-align: center;
    margin: 2rem 0;
}

.registrar-links {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 1rem;
    margin-top: .7rem;
}

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

.registrar-links a:hover {
    text-decoration: underline;
}

.disclaimer,
.tip {
    font-size: 0.875rem;
    color: var(--text-secondary);
    margin-bottom: 1rem;
}

/* History */
.history-section {
    margin-top: 3rem;
    border-top: 1px solid var(--border-color);
    padding-top: 2rem;
}

.history-list {
    list-style: none;
    margin-top: 1rem;
}

.history-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0.75rem;
    border-bottom: 1px solid var(--border-color);
}

.history-item:last-child {
    border-bottom: none;
}

.history-name {
    font-weight: 500;
    cursor: pointer;
}

.history-meta {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.history-time {
    font-size: 0.875rem;
    color: var(--text-secondary);
}

.delete-btn {
    background-color: var(--text-secondary);
    mask-image: url(../icons/trash-can-regular-full.svg);
    mask-size: contain;
    mask-repeat: no-repeat;
    mask-position: center;
    width: 24px;
    height: 24px;
    border: none;
    cursor: pointer;
    padding: 0 0.5rem;
}

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

.text-btn {
    background: none;
    border: none;
    color: var(--primary-color);
    cursor: pointer;
    font-weight: 500;
    margin-top: 1rem;
}

.footer {
    text-align: center;
    padding: 2rem;
    color: var(--text-secondary);
    font-size: 0.875rem;
    border-top: 1px solid var(--border-color);
    margin-top: auto;
}

.footer a {
    color: inherit;
}

@media (max-width: 600px) {
    .domain-list {
        grid-template-columns: 1fr;
    }
}

/* Info Button & Popup */
.info-btn {
    background: none;
    border: 1px solid var(--border-color);
    border-radius: 50%;
    width: 20px;
    height: 20px;
    font-size: 12px;
    color: var(--text-secondary);
    cursor: pointer;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    position: relative;
}

.info-btn:hover {
    background-color: var(--bg-color);
    color: var(--text-color);
}

.info-popup {
    position: fixed;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    background: var(--surface-color);
    padding: 1.5rem;
    border-radius: var(--radius);
    box-shadow: 0 4px 6px -1px rgb(0 0 0 / 0.1), 0 2px 4px -2px rgb(0 0 0 / 0.1);
    border: 1px solid var(--border-color);
    z-index: 100;
    max-width: 400px;
}

.info-popup h4 {
    margin-bottom: 0.5rem;
}

.info-popup p {
    font-size: 0.875rem;
    color: var(--text-secondary);
    margin-bottom: 1rem;
}

.info-popup button {
    padding: 0.5rem 1rem;
    background-color: var(--primary-color);
    color: white;
    border: none;
    border-radius: var(--radius);
    cursor: pointer;
    font-size: 0.875rem;
}

.popup-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.5);
    z-index: 99;
}

/* Bulk Open Link */
.bulk-open-item {
    grid-column: 1 / -1;
    text-align: right;
    padding: 1rem 0;
    border-bottom: 1px solid var(--border-color);
    margin-bottom: 0.5rem;
}

.bulk-open-link {
    color: var(--primary-color);
    text-decoration: none;
    font-size: 0.875rem;
    font-weight: 500;
    cursor: pointer;
}

.bulk-open-link:hover {
    text-decoration: underline;
}

/* Modal */
.modal {
    padding: 0;
    border: none;
    border-radius: var(--radius);
    box-shadow: 0 20px 25px -5px rgb(0 0 0 / 0.1), 0 8px 10px -6px rgb(0 0 0 / 0.1);
    background: var(--surface-color);
    color: var(--text-color);
    max-width: 500px;
    width: 90%;
    margin: auto;
    /* Required for centering with dialog::backdrop */
}

.modal::backdrop {
    background: rgba(0, 0, 0, 0.5);
    backdrop-filter: blur(2px);
}

.modal-content {
    padding: 1.5rem;
}

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

.modal-header h2 {
    font-size: 1.25rem;
    font-weight: 600;
}

.close-btn {
    background: none;
    border: none;
    font-size: 1.5rem;
    cursor: pointer;
    color: var(--text-secondary);
    padding: 0.25rem;
    line-height: 1;
}

.close-btn:hover {
    color: var(--text-color);
}

.modal-desc {
    color: var(--text-secondary);
    margin-bottom: 1.5rem;
    font-size: 0.95rem;
}

.form-group {
    margin-bottom: 1rem;
}

.form-group label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: 500;
    font-size: 0.9rem;
}

.form-group input,
.form-group textarea {
    width: 100%;
    padding: 0.75rem;
    border: 1px solid var(--border-color);
    border-radius: var(--radius);
    background-color: var(--bg-color);
    color: var(--text-color);
    font-family: inherit;
    font-size: 1rem;
    outline: none;
    transition: border-color 0.2s;
}

.form-group input:focus,
.form-group textarea:focus {
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
}

.form-group textarea {
    resize: vertical;
    min-height: 100px;
}

.form-actions {
    display: flex;
    justify-content: flex-end;
    margin-top: 1.5rem;
}

.submit-btn {
    background-color: var(--primary-color);
    color: white;
    border: none;
    padding: 0.75rem 1.5rem;
    border-radius: var(--radius);
    font-weight: 600;
    cursor: pointer;
    transition: background-color 0.2s;
}

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

.submit-btn:disabled {
    opacity: 0.7;
    cursor: not-allowed;
}

.status-message {
    margin-top: 1rem;
    padding: 0.75rem;
    border-radius: var(--radius);
    text-align: center;
    font-size: 0.9rem;
}

.status-message.success {
    background-color: rgba(16, 185, 129, 0.1);
    color: var(--success-color);
}

.status-message.error {
    background-color: rgba(239, 68, 68, 0.1);
    color: var(--danger-color);
}