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

body {
    font-family: 'Inter', sans-serif;
    background: linear-gradient(135deg, #f0f2f5 0%, #e0e4e8 100%);
    color: #1a1a1a;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

/* Контейнер */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 20px;
    flex: 1;
}

/* Заголовки */
h1 {
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: 1.5rem;
    color: #2c3e50;
}

h2 {
    font-size: 1.75rem;
    font-weight: 600;
    margin-bottom: 1rem;
    color: #34495e;
}

p {
    font-size: 1.125rem;
    line-height: 1.6;
    color: #666;
}

/* Кнопки */
.btn {
    padding: 12px 24px;
    font-size: 1rem;
    font-weight: 500;
    border: none;
    border-radius: 8px;
    cursor: pointer;
    transition: all 0.3s ease;
    display: inline-flex;
    align-items: center;
    justify-content: center;
}

.btn-primary {
    background-color: #3498db;
    color: #fff;
}

.btn-primary:hover {
    background-color: #2980b9;
    transform: translateY(-2px);
}

.btn-secondary {
    background-color: #7f8c8d;
    color: #fff;
}

.btn-secondary:hover {
    background-color: #6c757d;
    transform: translateY(-2px);
}

.btn-danger {
    background-color: #e74c3c;
    color: #fff;
}

.btn-danger:hover {
    background-color: #c0392b;
    transform: translateY(-2px);
}

/* Формы */
.auth-wrapper {
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: calc(100vh - 80px);
    padding: 20px;
}

.auth-card {
    background: #fff;
    padding: 2rem;
    border-radius: 12px;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.1);
    width: 100%;
    max-width: 400px;
}

.auth-title {
    font-size: 2rem;
    font-weight: 700;
    color: #2c3e50;
    text-align: center;
    margin-bottom: 1.5rem;
}

.form-group {
    margin-bottom: 1.25rem;
}

.form-group label {
    display: block;
    font-size: 1rem;
    font-weight: 500;
    color: #34495e;
    margin-bottom: 0.5rem;
}

.form-group input {
    width: 100%;
    padding: 12px;
    font-size: 1rem;
    border: 1px solid #ddd;
    border-radius: 8px;
    transition: border-color 0.3s ease;
}

.form-group input:focus {
    border-color: #3498db;
    outline: none;
    box-shadow: 0 0 5px rgba(52, 152, 219, 0.3);
}

/* Тесты */
.test-list {
    list-style: none;
    padding: 0;
    display: grid;
    gap: 1rem;
}

.test-item {
    background: #fff;
    padding: 1.5rem;
    border-radius: 12px;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.05);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.test-item:hover {
    transform: translateY(-5px);
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
}

.test-item a {
    font-size: 1.25rem;
    font-weight: 600;
    color: #3498db;
    text-decoration: none;
}

.test-item a:hover {
    color: #2980b9;
}

.test-item p {
    font-size: 1rem;
    color: #7f8c8d;
    margin-top: 0.5rem;
}

/* Popup */
.popup {
    position: fixed;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    background: #fff;
    padding: 2rem;
    border-radius: 12px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.2);
    z-index: 1000;
    width: 90%;
    max-width: 400px;
    text-align: center;
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.3s ease;
}

.popup.show {
    opacity: 1;
    visibility: visible;
}

.popup-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.6);
    z-index: 999;
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.3s ease;
}

.popup-overlay.show {
    opacity: 1;
    visibility: visible;
}

.popup-message {
    font-size: 1.125rem;
    color: #34495e;
}

/* Футер */
.footer {
    background: #2c3e50;
    color: #ecf0f1;
    padding: 1rem;
    text-align: center;
    font-size: 0.875rem;
}

.social-icons {
    margin-top: 0.5rem;
}

.social-icon {
    color: #ecf0f1;
    margin: 0 10px;
    text-decoration: none;
    font-size: 1rem;
    transition: color 0.3s ease;
}

.social-icon:hover {
    color: #3498db;
}

/* Адаптивность */
@media (max-width: 768px) {
    h1 { font-size: 2rem; }
    h2 { font-size: 1.5rem; }
    .auth-card { padding: 1.5rem; }
    .btn { padding: 10px 20px; }
    .test-list { grid-template-columns: 1fr; }
}