:root {
    --primary-color: #1a73e8;
    --secondary-color: #f8f9fa;
    --accent-color: #4285f4;
    --text-color: #202124;
    --light-text: #5f6368;
    --error-color: #ea4335;
    --success-color: #34a853;
    --border-color: #dadce0;
    --shadow-color: rgba(0, 0, 0, 0.1);
}

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

body {
    font-family: 'Roboto', sans-serif;
    background-color: var(--secondary-color);
    color: var(--text-color);
    line-height: 1.6;
    padding: 0;
    margin: 0;
}

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

header {
    background-color: white;
    box-shadow: 0 2px 10px var(--shadow-color);
    padding: 20px 0;
    position: sticky;
    top: 0;
    z-index: 100;
}

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

.logo {
    display: flex;
    align-items: center;
}

.logo img {
    height: 40px;
    margin-right: 10px;
}

.logo h1 {
    font-size: 24px;
    font-weight: 500;
    color: var(--primary-color);
}

.search-container {
    background-color: white;
    border-radius: 8px;
    box-shadow: 0 4px 15px var(--shadow-color);
    padding: 30px;
    margin-top: 30px;
}

.search-header {
    margin-bottom: 20px;
}

.search-header h2 {
    font-size: 22px;
    font-weight: 500;
    color: var(--text-color);
    margin-bottom: 10px;
}

.search-header p {
    color: var(--light-text);
    font-size: 16px;
}

.search-form {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.input-group {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.input-group label {
    font-size: 14px;
    font-weight: 500;
    color: var(--light-text);
}

.input-field {
    display: flex;
    gap: 10px;
}

.input-field input {
    flex: 1;
    padding: 12px 16px;
    border: 1px solid var(--border-color);
    border-radius: 4px;
    font-size: 16px;
    outline: none;
    transition: border-color 0.3s;
}

.input-field input:focus {
    border-color: var(--primary-color);
    box-shadow: 0 0 0 2px rgba(26, 115, 232, 0.2);
}

.btn {
    background-color: var(--primary-color);
    color: white;
    border: none;
    border-radius: 4px;
    padding: 12px 24px;
    font-size: 16px;
    font-weight: 500;
    cursor: pointer;
    transition: background-color 0.3s;
}

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

.search-mode {
    display: flex;
    gap: 20px;
    margin-bottom: 20px;
}

.search-mode button {
    background: none;
    border: none;
    font-size: 16px;
    font-weight: 500;
    color: var(--light-text);
    padding: 8px 16px;
    cursor: pointer;
    border-bottom: 2px solid transparent;
    transition: all 0.3s;
}

.search-mode button.active {
    color: var(--primary-color);
    border-bottom: 2px solid var(--primary-color);
}

.batch-input {
    display: none;
}

.keyword-input {
    display: none;
}

.batch-input textarea {
    width: 100%;
    height: 120px;
    padding: 12px 16px;
    border: 1px solid var(--border-color);
    border-radius: 4px;
    font-size: 16px;
    font-family: 'Roboto', sans-serif;
    resize: vertical;
    outline: none;
}

.batch-input textarea:focus {
    border-color: var(--primary-color);
    box-shadow: 0 0 0 2px rgba(26, 115, 232, 0.2);
}

.batch-input .hint {
    font-size: 14px;
    color: var(--light-text);
    margin-top: 8px;
}

.results-container {
    margin-top: 30px;
    background-color: white;
    border-radius: 8px;
    box-shadow: 0 4px 15px var(--shadow-color);
    padding: 30px;
    display: none;
}

.results-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 20px;
    padding-bottom: 15px;
    border-bottom: 1px solid var(--border-color);
}

.results-header h2 {
    font-size: 22px;
    font-weight: 500;
}

.results-stats {
    color: var(--light-text);
    font-size: 14px;
}

.results-list {
    display: flex;
    flex-direction: column;
    gap: 15px;
}

.result-item {
    padding: 15px;
    border: 1px solid var(--border-color);
    border-radius: 8px;
    transition: box-shadow 0.3s;
}

.result-item:hover {
    box-shadow: 0 4px 8px var(--shadow-color);
}

.result-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 10px;
}

.result-id {
    font-weight: 500;
    font-size: 18px;
    color: var(--primary-color);
}

.result-status {
    font-size: 14px;
    padding: 4px 12px;
    border-radius: 12px;
}

.status-found {
    background-color: rgba(52, 168, 83, 0.1);
    color: var(--success-color);
}

.status-not-found {
    background-color: rgba(234, 67, 53, 0.1);
    color: var(--error-color);
}

.result-url {
    word-break: break-all;
    margin-top: 10px;
}

.result-url a {
    color: var(--primary-color);
    text-decoration: none;
    transition: color 0.3s;
}

.result-url a:hover {
    text-decoration: underline;
}

.loader {
    display: none;
    text-align: center;
    padding: 20px;
}

.spinner {
    border: 4px solid rgba(0, 0, 0, 0.1);
    border-radius: 50%;
    border-top: 4px solid var(--primary-color);
    width: 40px;
    height: 40px;
    animation: spin 1s linear infinite;
    margin: 0 auto;
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

.error-message {
    background-color: rgba(234, 67, 53, 0.1);
    color: var(--error-color);
    padding: 15px;
    border-radius: 4px;
    margin-top: 20px;
    display: none;
}

footer {
    text-align: center;
    padding: 30px 0;
    margin-top: 50px;
    color: var(--light-text);
    font-size: 14px;
}

@media (max-width: 768px) {
    .header-content {
        flex-direction: column;
        gap: 15px;
    }

    .input-field {
        flex-direction: column;
    }

    .search-mode {
        overflow-x: auto;
        padding-bottom: 5px;
    }
}