:root {
    --primary: #1a73e8;
    --primary-hover: #1557b0;
    --bg-color: #f0f4f8;
    --card-bg: rgba(255, 255, 255, 0.85);
    --text-main: #333;
    --text-muted: #666;
}

body {
    font-family: system-ui, -apple-system, 'Segoe UI', 'Microsoft YaHei', 'PingFang SC', sans-serif;
    background: linear-gradient(135deg, #e0c3fc 0%, #8ec5fc 100%);
    min-height: 100vh;
    margin: 0;
    color: var(--text-main);
    display: flex;
    justify-content: center;
    align-items: center;
    padding: 20px;
}

.glass-container {
    background: var(--card-bg);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-radius: 20px;
    border: 1px solid rgba(255, 255, 255, 0.4);
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.1);
    width: 100%;
    max-width: 1000px;
    min-height: 600px;
    display: flex;
    flex-direction: column;
    overflow: hidden;
}

header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 30px 40px;
    border-bottom: 1px solid rgba(0,0,0,0.05);
}

.logo-area h1 {
    margin: 0;
    font-size: 24px;
    color: #1a237e;
    font-weight: 700;
}

.logo-area p {
    margin: 5px 0 0;
    font-size: 14px;
    color: var(--text-muted);
}

nav .nav-btn {
    text-decoration: none;
    color: var(--text-main);
    margin-left: 20px;
    font-weight: 500;
    transition: color 0.2s;
}

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

nav .admin-btn {
    background: rgba(26, 115, 232, 0.1);
    padding: 8px 16px;
    border-radius: 20px;
    color: var(--primary);
}

main {
    flex: 1;
    padding: 40px;
}

footer {
    text-align: center;
    padding: 20px;
    font-size: 12px;
    color: var(--text-muted);
    border-top: 1px solid rgba(0,0,0,0.05);
}

/* Common Components */
.primary-btn {
    background: var(--primary);
    color: white;
    border: none;
    padding: 12px 24px;
    border-radius: 8px;
    font-size: 16px;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.2s;
    box-shadow: 0 4px 10px rgba(26, 115, 232, 0.2);
}

.primary-btn:hover {
    background: var(--primary-hover);
    transform: translateY(-2px);
    box-shadow: 0 6px 15px rgba(26, 115, 232, 0.3);
}

.action-btn {
    display: inline-block;
    text-decoration: none;
    background: #e8f0fe;
    color: var(--primary);
    padding: 8px 16px;
    border-radius: 6px;
    font-size: 14px;
    font-weight: 500;
    transition: all 0.2s;
}

.action-btn:hover {
    background: #d2e3fc;
}

.action-btn.small {
    padding: 4px 10px;
    font-size: 13px;
}

/* Form Styles */
.form-group {
    margin-bottom: 20px;
}

.form-group label {
    display: block;
    margin-bottom: 8px;
    font-weight: 500;
    color: #444;
}

.form-group input {
    width: 100%;
    padding: 12px 15px;
    border: 1px solid #ddd;
    border-radius: 8px;
    font-size: 15px;
    box-sizing: border-box;
    transition: border-color 0.2s;
    background: rgba(255,255,255,0.9);
}

.form-group input:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(26, 115, 232, 0.1);
}

/* Search Section */
.search-section {
    max-width: 600px;
    margin: 0 auto;
}

.search-section h2 {
    text-align: center;
    color: #1a237e;
    margin-bottom: 5px;
}

.search-section .subtitle {
    text-align: center;
    color: var(--text-muted);
    margin-bottom: 30px;
}

.search-box {
    background: rgba(255, 255, 255, 0.6);
    padding: 30px;
    border-radius: 16px;
    box-shadow: 0 4px 15px rgba(0,0,0,0.03);
}

.search-btn {
    width: 100%;
    margin-top: 10px;
}

/* Results */
.results-container {
    margin-top: 40px;
}

.results-grid {
    display: grid;
    gap: 20px;
}

.result-card {
    background: white;
    padding: 20px;
    border-radius: 12px;
    box-shadow: 0 2px 8px rgba(0,0,0,0.05);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

@media (max-width: 640px) {
    body {
        padding: 10px;
    }

    header,
    main {
        padding: 24px 20px;
    }

    header,
    .result-card {
        align-items: stretch;
        flex-direction: column;
        gap: 16px;
    }

    nav .nav-btn {
        margin-left: 0;
    }

    .search-box {
        padding: 20px;
    }
}

.cert-info h4 {
    margin: 0 0 10px 0;
    color: #1a237e;
}

.cert-info p {
    margin: 4px 0;
    font-size: 14px;
    color: #555;
}

.no-data {
    text-align: center;
    color: #d32f2f;
    padding: 20px;
    background: #ffebee;
    border-radius: 8px;
}

/* Admin Section */
.admin-section h2 {
    color: #1a237e;
    margin-top: 0;
    margin-bottom: 30px;
}

.upload-box {
    background: rgba(255,255,255,0.6);
    padding: 25px;
    border-radius: 12px;
    margin-bottom: 40px;
}

.upload-box h3 {
    margin-top: 0;
}

.file-input {
    display: block;
    margin-bottom: 20px;
}

.status-message {
    margin-top: 15px;
    font-weight: 500;
}

.status-message .success { color: #2e7d32; }
.status-message .error { color: #d32f2f; }
.status-message .loading { color: var(--primary); }

.records-box {
    background: rgba(255,255,255,0.6);
    padding: 25px;
    border-radius: 12px;
}

table {
    width: 100%;
    border-collapse: collapse;
}

th, td {
    padding: 12px 15px;
    text-align: left;
    border-bottom: 1px solid rgba(0,0,0,0.05);
}

th {
    background: rgba(0,0,0,0.02);
    font-weight: 600;
    color: #444;
}

tbody tr:hover {
    background: rgba(255,255,255,0.8);
}