:root {
    --primary-color: #4a90e2;
    --secondary-color: #50e3c2;
    --accent-color: #9013FE;
    --background-gradient: linear-gradient(135deg, #f5f7fa, #c3cfe2);
    --header-bg: #ffffff;
    --card-bg: rgba(255, 255, 255, 0.9);
    --shadow-color: rgba(0, 0, 0, 0.1);
    --success-color: #27ae60;
    --danger-color: #e74c3c;
    --warning-color: #f39c12;
    --text-color: #333333;
    --light-text: #7f8c8d;
    --border-color: #ecf0f1;
    --transition-speed: 0.3s;
    --footer-bg: #f0f4f8;
    --loading-overlay-bg: rgba(255, 255, 255, 0.8);
    --spinner-color: var(--primary-color);
}
*, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}
body {
    font-family: 'Roboto', sans-serif;
    background: var(--background-gradient);
    color: var(--text-color);
    line-height: 1.6;
    transition: background 0.5s ease;
}
a {
    text-decoration: none;
    color: var(--primary-color);
    transition: color var(--transition-speed) ease;
}
a:hover {
    color: var(--accent-color);
}
.container {
    max-width: 1200px;
    margin: 60px auto 40px;
    padding: 40px 20px;
    background: var(--card-bg);
    border-radius: 20px;
    box-shadow: 0 8px 32px var(--shadow-color);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.2);
    position: relative;
    overflow: hidden;
}
.header {
    text-align: center;
    margin-bottom: 40px;
}
.header h1 {
    font-size: 3rem;
    color: var(--primary-color);
    margin-bottom: 10px;
    font-weight: 700;
    letter-spacing: 1px;
    position: relative;
}
.header h1::after {
    content: '';
    display: block;
    width: 60px;
    height: 4px;
    background: var(--secondary-color);
    margin: 10px auto 0;
    border-radius: 2px;
}
.header p {
    font-size: 1.2rem;
    color: var(--light-text);
    margin-top: 5px;
}
.navbar {
    display: flex;
    justify-content: center;
    gap: 30px;
    margin-bottom: 30px;
    flex-wrap: wrap;
}
.navbar a {
    font-size: 1rem;
    color: var(--text-color);
    font-weight: 500;
    position: relative;
    padding: 8px 0;
    display: flex;
    align-items: center;
}
.navbar a i {
    margin-right: 8px;
    color: var(--primary-color);
}
.navbar a::after {
    content: '';
    display: block;
    width: 0;
    height: 3px;
    background: var(--primary-color);
    transition: width var(--transition-speed) ease;
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    border-radius: 2px;
}
.navbar a:hover::after {
    width: 100%;
}
.form-group {
    margin-bottom: 25px;
}
label {
    display: block;
    font-weight: 600;
    margin-bottom: 10px;
    font-size: 1.1rem;
    color: var(--text-color);
}
textarea {
    width: 100%;
    padding: 15px;
    border: 2px solid var(--border-color);
    border-radius: 10px;
    font-size: 1rem;
    resize: vertical;
    transition: border-color var(--transition-speed) ease, box-shadow var(--transition-speed) ease;
    background-color: #ffffff;
    box-shadow: inset 0 2px 4px rgba(0,0,0,0.05);
}
textarea:focus {
    border-color: var(--primary-color);
    outline: none;
    box-shadow: 0 0 12px rgba(74, 144, 226, 0.4);
    background-color: #f0f8ff;
}
.form-text {
    font-size: 0.95rem;
    color: var(--light-text);
    margin-top: 5px;
}
.btn-submit {
    display: inline-block;
    padding: 14px 28px;
    background: var(--primary-color);
    color: #fff;
    border: none;
    border-radius: 30px;
    cursor: pointer;
    font-size: 1.1rem;
    font-weight: 600;
    transition: background var(--transition-speed) ease, transform var(--transition-speed) ease, box-shadow var(--transition-speed) ease;
    box-shadow: 0 4px 6px rgba(0,0,0,0.1);
}
.btn-submit:hover {
    background: var(--secondary-color);
    transform: translateY(-2px);
    box-shadow: 0 6px 12px rgba(0,0,0,0.15);
}
.alert {
    padding: 20px;
    border-radius: 10px;
    margin-bottom: 25px;
    font-size: 1rem;
    display: flex;
    align-items: center;
    gap: 15px;
    animation: fadeIn 0.5s ease-in-out;
    background-color: #ffe6e6;
    color: var(--danger-color);
    border-left: 5px solid var(--danger-color);
}
.alert i {
    font-size: 1.5rem;
}
.table-responsive {
    overflow-x: auto;
    margin-top: 30px;
    border-radius: 15px;
    border: 1px solid var(--border-color);
    box-shadow: 0 4px 8px rgba(0,0,0,0.05);
}
.results-table {
    width: 100%;
    border-collapse: collapse;
    font-size: 0.95rem;
    min-width: 900px;
}
.results-table thead {
    background: var(--primary-color);
    color: #fff;
}
.results-table th, .results-table td {
    padding: 12px 20px;
    text-align: left;
    border-bottom: 1px solid var(--border-color);
}
.results-table th {
    position: sticky;
    top: 0;
    z-index: 2;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}
.results-table tbody tr:nth-child(even) {
    background-color: #f9f9f9;
}
.results-table tbody tr:hover {
    background-color: #e8f4fd;
    transition: background-color var(--transition-speed) ease;
}
.badge-success {
    display: inline-block;
    padding: 6px 14px;
    background-color: var(--success-color);
    color: #fff;
    border-radius: 20px;
    font-size: 0.9rem;
    transition: background-color var(--transition-speed) ease;
}
.badge-success:hover {
    background-color: #1e8449;
}
.badge-danger {
    display: inline-block;
    padding: 6px 14px;
    background-color: var(--danger-color);
    color: #fff;
    border-radius: 20px;
    font-size: 0.9rem;
    transition: background-color var(--transition-speed) ease;
}
.badge-danger:hover {
    background-color: #c0392b;
}
.btn-recheck {
    padding: 8px 16px;
    background-color: var(--warning-color);
    color: #fff;
    border: none;
    border-radius: 20px;
    cursor: pointer;
    font-size: 0.9rem;
    transition: background-color var(--transition-speed) ease, transform var(--transition-speed) ease;
}
.btn-recheck:hover {
    background-color: #d35400;
    transform: translateY(-2px);
}
.footer {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-top: 60px;
    font-size: 0.9rem;
    color: var(--light-text);
    flex-wrap: wrap;
    padding: 20px;
    border-top: 1px solid var(--border-color);
    background: var(--card-bg);
    border-radius: 20px;
    box-shadow: 0 4px 8px var(--shadow-color);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.2);
}
.footer .left {
    margin-bottom: 10px;
    font-weight: 500;
}
.footer .right {
    display: flex;
    align-items: center;
    gap: 15px;
    margin-bottom: 10px;
}
.footer .right a {
    color: var(--primary-color);
    transition: color var(--transition-speed) ease;
    font-size: 1.5rem;
    display: flex;
    align-items: center;
}
.footer .right a:hover {
    color: var(--accent-color);
}
.footer .developer {
    font-weight: 500;
    margin-right: 10px;
}
.footer .developer a {
    color: var(--primary-color);
    font-weight: 700;
}
.loading-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: var(--loading-overlay-bg);
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 9999;
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.3s ease, visibility 0.3s ease;
}
.loading-overlay.active {
    opacity: 1;
    visibility: visible;
}
.spinner {
    border: 8px solid #f3f3f3;
    border-top: 8px solid var(--spinner-color);
    border-radius: 50%;
    width: 60px;
    height: 60px;
    animation: spin 1s linear infinite;
    margin-bottom: 20px;
}
.loading-message {
    font-size: 1.2rem;
    color: var(--text-color);
    font-weight: 600;
    text-align: center;
}
@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}
@keyframes fadeIn {
    from { opacity: 0; transform: translateY(-10px); }
    to { opacity: 1; transform: translateY(0); }
}
@media (max-width: 768px) {
    .footer {
        flex-direction: column;
        align-items: center;
        text-align: center;
    }
    .footer .right {
        gap: 10px;
    }
}
@media (max-width: 480px) {
    .footer {
        padding: 15px;
    }
    .footer .right a {
        font-size: 1.2rem;
    }
}