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

:root {
    --primary-color: #3b82f6;
    --primary-dark: #1e40af;
    --primary-light: #dbeafe;
    --secondary-color: #10b981;
    --danger-color: #ef4444;
    --warning-color: #f59e0b;
    --text-color: #1f2937;
    --text-light: #6b7280;
    --border-color: #e5e7eb;
    --bg-light: #f9fafb;
    --bg-white: #ffffff;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    line-height: 1.6;
    color: var(--text-color);
    background-color: var(--bg-light);
}

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

/* Navbar */
.navbar {
    background-color: var(--bg-white);
    border-bottom: 1px solid var(--border-color);
    position: sticky;
    top: 0;
    z-index: 100;
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.1);
}

.navbar .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 15px 20px;
}

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

.nav-links {
    display: flex;
    list-style: none;
    gap: 40px;
}

.nav-link {
    text-decoration: none;
    color: var(--text-color);
    font-weight: 500;
    cursor: pointer;
    transition: color 0.3s ease;
    border-bottom: 3px solid transparent;
    padding-bottom: 5px;
}

.nav-link:hover,
.nav-link.active {
    color: var(--primary-color);
    border-bottom-color: var(--primary-color);
}

/* Sections */
.section {
    display: none;
    padding: 60px 0;
    min-height: calc(100vh - 200px);
}

.section.active {
    display: block;
}

.section h1 {
    font-size: 2.5em;
    margin-bottom: 30px;
    text-align: center;
}

.subtitle {
    font-size: 1.1em;
    text-align: center;
    color: var(--text-light);
    margin-bottom: 40px;
}

/* Hero */
.hero {
    text-align: center;
    padding: 80px 20px;
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--primary-dark) 100%);
    color: white;
    border-radius: 15px;
    margin: 20px 0;
}

.hero h1 {
    font-size: 3em;
    margin-bottom: 20px;
    color: white;
}

.hero p {
    font-size: 1.3em;
    margin-bottom: 40px;
    opacity: 0.95;
}

/* Buttons */
.btn {
    padding: 12px 24px;
    border: none;
    border-radius: 8px;
    font-size: 1em;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    text-decoration: none;
    display: inline-block;
}

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

.btn-primary:hover {
    background-color: var(--primary-dark);
    transform: translateY(-2px);
    box-shadow: 0 10px 20px rgba(59, 130, 246, 0.3);
}

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

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

.btn-small {
    padding: 8px 16px;
    font-size: 0.9em;
}

/* Cards Grid */
.cards-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 30px;
    margin: 40px 0;
}

.card {
    background-color: var(--bg-white);
    border-radius: 12px;
    overflow: hidden;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
    transition: all 0.3s ease;
}

.card:hover {
    box-shadow: 0 8px 16px rgba(0, 0, 0, 0.15);
    transform: translateY(-5px);
}

.card-header {
    background: linear-gradient(135deg, var(--primary-light) 0%, rgba(219, 234, 254, 0.5) 100%);
    padding: 25px 20px;
    border-bottom: 3px solid var(--primary-color);
}

.card-header h2 {
    font-size: 1.5em;
    margin: 0;
}

.card-content {
    padding: 25px 20px;
}

.card-content h3 {
    margin-top: 20px;
    margin-bottom: 12px;
    font-size: 1.1em;
    color: var(--primary-color);
}

.card-content h3:first-child {
    margin-top: 0;
}

.card-content ul,
.card-content ol {
    margin-left: 20px;
    margin-bottom: 15px;
}

.card-content li {
    margin-bottom: 8px;
    line-height: 1.6;
}

/* Code blocks */
.code-block {
    background-color: #f3f4f6;
    border-left: 4px solid var(--primary-color);
    padding: 15px;
    margin: 15px 0;
    border-radius: 4px;
    font-family: 'Courier New', monospace;
    overflow-x: auto;
    display: block;
    font-size: 0.9em;
}

/* Info Box */
.info-box {
    background-color: var(--primary-light);
    border-left: 5px solid var(--primary-color);
    padding: 20px;
    border-radius: 8px;
    margin: 30px 0;
}

.info-box h3,
.info-box h4 {
    margin-bottom: 15px;
    color: var(--primary-dark);
}

.info-box ol {
    margin-left: 30px;
}

.info-box li {
    margin-bottom: 10px;
}

/* Forms */
.configurator-wrapper {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 40px;
    margin-top: 40px;
}

.form-section,
.results-section {
    background-color: var(--bg-white);
    padding: 30px;
    border-radius: 12px;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
}

.form-section h2,
.results-section h2 {
    margin-bottom: 25px;
    font-size: 1.5em;
    padding-bottom: 15px;
    border-bottom: 2px solid var(--primary-color);
}

.form-group {
    margin-bottom: 25px;
}

.form-group label {
    display: block;
    margin-bottom: 8px;
    font-weight: 600;
    color: var(--text-color);
}

.form-group input[type="text"],
.form-group input[type="email"],
.form-group select {
    width: 100%;
    padding: 12px;
    border: 1px solid var(--border-color);
    border-radius: 6px;
    font-size: 1em;
    transition: border-color 0.3s ease;
}

.form-group input[type="text"]:focus,
.form-group input[type="email"]:focus,
.form-group select:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.1);
}

.form-group small {
    display: block;
    margin-top: 6px;
    color: var(--text-light);
    font-size: 0.9em;
}

.radio-group {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.radio-group label {
    display: flex;
    align-items: center;
    font-weight: 400;
    cursor: pointer;
    margin-bottom: 0;
}

.radio-group input[type="radio"] {
    margin-right: 12px;
    cursor: pointer;
    width: 18px;
    height: 18px;
}

/* Results */
.results-info {
    color: var(--text-light);
    margin-bottom: 20px;
}

.record-box {
    background-color: #f3f4f6;
    border: 2px solid var(--border-color);
    border-radius: 8px;
    margin-bottom: 20px;
    overflow: hidden;
}

.record-header {
    background-color: var(--bg-light);
    padding: 15px 20px;
    border-bottom: 1px solid var(--border-color);
}

.record-header h3 {
    margin: 0;
    font-size: 1.1em;
}

.record-header small {
    color: var(--text-light);
    display: block;
    margin-top: 5px;
}

.record-content {
    padding: 20px;
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    gap: 15px;
}

.record-content code {
    background-color: white;
    padding: 15px;
    border-radius: 6px;
    font-family: 'Courier New', monospace;
    flex: 1;
    word-break: break-all;
    line-height: 1.5;
    border: 1px solid var(--border-color);
}

/* Footer */
footer {
    background-color: var(--text-color);
    color: white;
    text-align: center;
    padding: 30px 0;
    margin-top: 60px;
}

/* Verify Section */
.verify-wrapper {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 40px;
    margin-top: 40px;
}

.verify-form-section,
.verify-results-section {
    background-color: var(--bg-white);
    padding: 30px;
    border-radius: 12px;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
}

.verify-form-section h2,
.verify-results-section h2 {
    margin-bottom: 25px;
    font-size: 1.5em;
    padding-bottom: 15px;
    border-bottom: 2px solid var(--primary-color);
}

.checkbox-group {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.checkbox-group label {
    display: flex;
    align-items: center;
    font-weight: 400;
    cursor: pointer;
    margin-bottom: 0;
}

.checkbox-group input[type="checkbox"] {
    margin-right: 12px;
    cursor: pointer;
    width: 18px;
    height: 18px;
}

.verify-record {
    background-color: #f9fafb;
    border-left: 5px solid var(--border-color);
    border-radius: 8px;
    margin-bottom: 20px;
    overflow: hidden;
}

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

.record-status-header h3 {
    margin: 0;
    font-size: 1.1em;
}

.status-badge {
    display: inline-block;
    padding: 6px 12px;
    border-radius: 20px;
    font-size: 0.85em;
    font-weight: 600;
    text-transform: uppercase;
}

.status-badge.status-found {
    background-color: #d1fae5;
    color: #065f46;
    border: 1px solid #10b981;
}

.status-badge.status-not-found {
    background-color: #fee2e2;
    color: #7f1d1d;
    border: 1px solid #ef4444;
}

.status-badge.status-warning {
    background-color: #fef3c7;
    color: #92400e;
    border: 1px solid #f59e0b;
}

.status-badge.status-loading {
    background-color: #dbeafe;
    color: #1e40af;
    border: 1px solid #3b82f6;
}

.record-status-body {
    padding: 20px;
}

.record-explanation {
    color: var(--text-light);
    margin-bottom: 15px;
    font-size: 0.95em;
    line-height: 1.5;
}

.record-value {
    background-color: white;
    border: 1px solid var(--border-color);
    padding: 15px;
    border-radius: 6px;
    font-family: 'Courier New', monospace;
    font-size: 0.85em;
    line-height: 1.6;
    word-break: break-all;
    color: var(--text-color);
}

.record-value.empty {
    color: var(--text-light);
    font-style: italic;
}

.loading-spinner {
    display: inline-block;
    width: 16px;
    height: 16px;
    border: 2px solid var(--border-color);
    border-top-color: var(--primary-color);
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
}

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

/* Responsive */
@media (max-width: 768px) {
    .nav-links {
        gap: 20px;
    }

    .hero h1 {
        font-size: 2em;
    }

    .hero p {
        font-size: 1.1em;
    }

    .cards-grid {
        grid-template-columns: 1fr;
    }

    .configurator-wrapper {
        grid-template-columns: 1fr;
        gap: 30px;
    }

    .verify-wrapper {
        grid-template-columns: 1fr;
        gap: 30px;
    }

    .record-content {
        flex-direction: column;
    }

    .section h1 {
        font-size: 2em;
    }
}