:root {
    --primary-color: #0066cc;
    --primary-dark: #0052a3;
    --secondary-color: #28a745;
    --danger-color: #dc3545;
    --warning-color: #ffc107;
    --dark-color: #333;
    --light-color: #f8f9fa;
    --border-color: #ddd;
    --shadow: 0 2px 10px rgba(0,0,0,0.1);
    --shadow-hover: 0 4px 20px rgba(0,0,0,0.15);
}

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

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    line-height: 1.6;
    color: var(--dark-color);
    background-color: #f5f7fa;
}

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

/* Navbar */
.navbar {
    background: linear-gradient(135deg, var(--primary-color), var(--primary-dark));
    color: white;
    padding: 1rem 0;
    box-shadow: var(--shadow);
    position: sticky;
    top: 0;
    z-index: 100;
}

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

.nav-brand {
    font-size: 1.5rem;
    font-weight: bold;
    display: flex;
    align-items: center;
    gap: 10px;
}

.nav-brand i {
    font-size: 1.8rem;
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: 2rem;
}

.nav-link {
    color: white;
    text-decoration: none;
    padding: 0.5rem 1rem;
    border-radius: 5px;
    transition: background 0.3s;
}

.nav-link:hover,
.nav-link.active {
    background: rgba(255, 255, 255, 0.2);
}

/* Main Content */
.main-content {
    min-height: calc(100vh - 200px);
    padding: 2rem 0;
}

.section {
    display: none;
}

.section.active {
    display: block;
}

/* Hero Section */
.hero {
    text-align: center;
    margin-bottom: 3rem;
    padding: 2rem 0;
}

.hero h1 {
    font-size: 2.5rem;
    margin-bottom: 1rem;
    color: var(--primary-color);
}

.hero p {
    font-size: 1.2rem;
    color: #666;
}

/* Search Box */
.search-box {
    max-width: 800px;
    margin: 0 auto 3rem;
}

.search-input-wrapper {
    display: flex;
    gap: 10px;
    background: white;
    padding: 10px;
    border-radius: 50px;
    box-shadow: var(--shadow);
}

.search-input {
    flex: 1;
    border: none;
    padding: 15px 20px;
    font-size: 1rem;
    outline: none;
}

.tld-select {
    border: none;
    padding: 15px;
    font-size: 1rem;
    background: var(--light-color);
    border-radius: 25px;
    outline: none;
    cursor: pointer;
}

.search-btn {
    background: var(--primary-color);
    color: white;
    border: none;
    padding: 15px 30px;
    border-radius: 25px;
    font-size: 1rem;
    cursor: pointer;
    transition: background 0.3s;
    display: flex;
    align-items: center;
    gap: 8px;
}

.search-btn:hover {
    background: var(--primary-dark);
}

/* Search Results */
.search-results {
    max-width: 800px;
    margin: 2rem auto;
    background: white;
    border-radius: 10px;
    padding: 2rem;
    box-shadow: var(--shadow);
}

.search-results.hidden {
    display: none;
}

.result-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1.5rem;
    border-bottom: 1px solid var(--border-color);
}

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

.result-domain {
    font-size: 1.3rem;
    font-weight: 600;
    color: var(--dark-color);
}

.result-status {
    padding: 0.5rem 1rem;
    border-radius: 5px;
    font-weight: 500;
}

.status-available {
    background: var(--secondary-color);
    color: white;
}

.status-taken {
    background: var(--danger-color);
    color: white;
}

.status-warning {
    background: var(--warning-color);
    color: #333;
}

/* Popular TLDs */
.popular-tlds {
    max-width: 800px;
    margin: 3rem auto;
}

.popular-tlds h3 {
    text-align: center;
    margin-bottom: 2rem;
    color: var(--dark-color);
}

.tld-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
    gap: 1rem;
}

.tld-card {
    background: white;
    padding: 2rem;
    border-radius: 10px;
    text-align: center;
    box-shadow: var(--shadow);
    transition: transform 0.3s, box-shadow 0.3s;
    cursor: pointer;
}

.tld-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-hover);
}

.tld-name {
    font-size: 1.5rem;
    font-weight: bold;
    color: var(--primary-color);
    margin-bottom: 0.5rem;
}

.tld-desc {
    color: #666;
    font-size: 0.9rem;
}

/* Section Header */
.section-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 2rem;
}

.section-header h2 {
    color: var(--dark-color);
    font-size: 2rem;
}

/* Buttons */
.btn {
    padding: 10px 20px;
    border: none;
    border-radius: 5px;
    cursor: pointer;
    font-size: 1rem;
    transition: all 0.3s;
    display: inline-flex;
    align-items: center;
    gap: 8px;
}

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

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

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

.btn-success:hover {
    background: #218838;
}

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

.btn-danger:hover {
    background: #c82333;
}

.btn-secondary {
    background: #6c757d;
    color: white;
}

.btn-secondary:hover {
    background: #5a6268;
}

/* Loading */
.loading {
    text-align: center;
    padding: 3rem;
    font-size: 1.2rem;
    color: var(--primary-color);
}

.loading.hidden {
    display: none;
}

/* Domains List */
.domains-list {
    display: grid;
    gap: 1rem;
}

.domain-card {
    background: white;
    border-radius: 10px;
    padding: 1.5rem;
    box-shadow: var(--shadow);
    transition: transform 0.3s, box-shadow 0.3s;
}

.domain-card:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-hover);
}

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

.domain-name {
    font-size: 1.5rem;
    font-weight: bold;
    color: var(--primary-color);
}

.domain-status {
    padding: 0.3rem 0.8rem;
    border-radius: 15px;
    font-size: 0.85rem;
    font-weight: 500;
}

.status-active {
    background: #d4edda;
    color: #155724;
}

.status-expired {
    background: #f8d7da;
    color: #721c24;
}

.domain-info {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 1rem;
    margin-bottom: 1rem;
}

.info-item {
    display: flex;
    flex-direction: column;
}

.info-label {
    font-size: 0.85rem;
    color: #666;
    margin-bottom: 0.25rem;
}

.info-value {
    font-weight: 500;
}

.domain-actions {
    display: flex;
    gap: 0.5rem;
    flex-wrap: wrap;
}

.btn-small {
    padding: 0.5rem 1rem;
    font-size: 0.9rem;
}

/* DNS Management */
.dns-selector {
    background: white;
    padding: 2rem;
    border-radius: 10px;
    box-shadow: var(--shadow);
    margin-bottom: 2rem;
    display: flex;
    gap: 1rem;
    align-items: center;
    flex-wrap: wrap;
}

.dns-selector label {
    font-weight: 600;
}

.form-select {
    flex: 1;
    padding: 10px 15px;
    border: 1px solid var(--border-color);
    border-radius: 5px;
    font-size: 1rem;
    outline: none;
}

.form-select:focus {
    border-color: var(--primary-color);
}

.dns-records {
    background: white;
    border-radius: 10px;
    padding: 2rem;
    box-shadow: var(--shadow);
}

.dns-records.hidden {
    display: none;
}

.dns-tabs {
    display: flex;
    gap: 0.5rem;
    margin-bottom: 2rem;
    border-bottom: 2px solid var(--border-color);
}

.dns-tab {
    padding: 1rem 1.5rem;
    background: none;
    border: none;
    cursor: pointer;
    font-size: 1rem;
    color: #666;
    border-bottom: 3px solid transparent;
    transition: all 0.3s;
}

.dns-tab:hover {
    color: var(--primary-color);
}

.dns-tab.active {
    color: var(--primary-color);
    border-bottom-color: var(--primary-color);
    font-weight: 600;
}

.dns-actions {
    margin-bottom: 2rem;
}

.dns-records-list {
    display: grid;
    gap: 1rem;
}

.dns-record-item {
    padding: 1.5rem;
    border: 1px solid var(--border-color);
    border-radius: 8px;
    display: grid;
    grid-template-columns: 2fr 3fr 1fr auto;
    gap: 1rem;
    align-items: center;
}

.record-name {
    font-weight: 600;
    color: var(--dark-color);
}

.record-value {
    color: #666;
    word-break: break-all;
}

.record-ttl {
    color: #999;
    font-size: 0.9rem;
}

.record-actions {
    display: flex;
    gap: 0.5rem;
}

/* Modal */
.modal {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.5);
    z-index: 1000;
    justify-content: center;
    align-items: center;
}

.modal.active {
    display: flex;
}

.modal.hidden {
    display: none;
}

.modal-content {
    background: white;
    border-radius: 10px;
    max-width: 600px;
    width: 90%;
    max-height: 80vh;
    overflow-y: auto;
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.3);
}

.modal-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1.5rem;
    border-bottom: 1px solid var(--border-color);
}

.modal-header h3 {
    margin: 0;
    color: var(--dark-color);
}

.modal-close {
    background: none;
    border: none;
    font-size: 1.5rem;
    cursor: pointer;
    color: #999;
    transition: color 0.3s;
}

.modal-close:hover {
    color: var(--dark-color);
}

.modal-body {
    padding: 2rem;
}

/* Form */
.form-group {
    margin-bottom: 1.5rem;
}

.form-group label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: 600;
    color: var(--dark-color);
}

.form-input {
    width: 100%;
    padding: 10px 15px;
    border: 1px solid var(--border-color);
    border-radius: 5px;
    font-size: 1rem;
    outline: none;
    transition: border-color 0.3s;
}

.form-input:focus {
    border-color: var(--primary-color);
}

.form-actions {
    display: flex;
    gap: 1rem;
    justify-content: flex-end;
}

/* Footer */
.footer {
    background: var(--dark-color);
    color: white;
    text-align: center;
    padding: 2rem 0;
    margin-top: 4rem;
}

.footer a {
    color: var(--primary-color);
    text-decoration: none;
}

.footer a:hover {
    text-decoration: underline;
}

/* Alert Messages */
.alert {
    padding: 1rem 1.5rem;
    border-radius: 5px;
    margin-bottom: 1rem;
}

.alert-success {
    background: #d4edda;
    color: #155724;
    border: 1px solid #c3e6cb;
}

.alert-error {
    background: #f8d7da;
    color: #721c24;
    border: 1px solid #f5c6cb;
}

.alert-info {
    background: #d1ecf1;
    color: #0c5460;
    border: 1px solid #bee5eb;
}

/* Responsive */
@media (max-width: 768px) {
    .nav-menu {
        gap: 0.5rem;
    }

    .nav-link {
        padding: 0.5rem;
        font-size: 0.9rem;
    }

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

    .search-input-wrapper {
        flex-direction: column;
        border-radius: 10px;
    }

    .search-btn,
    .tld-select {
        border-radius: 5px;
    }

    .dns-selector {
        flex-direction: column;
        align-items: stretch;
    }

    .dns-record-item {
        grid-template-columns: 1fr;
    }

    .section-header {
        flex-direction: column;
        align-items: flex-start;
        gap: 1rem;
    }

    .domain-info {
        grid-template-columns: 1fr;
    }
}