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

body {
    font-family: 'Inter', sans-serif;
    background: linear-gradient(135deg, #f5f7fa 0%, #c3cfe2 100%);
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
}

.container {
    width: 100%;
    max-width: 1200px;
    padding: 20px;
}

.auth-container {
    background: white;
    border-radius: 20px;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.1);
    padding: 50px;
    max-width: 500px;
    margin: 0 auto;
    position: relative;
    overflow: hidden;
}

.auth-container::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: linear-gradient(90deg, #667eea 0%, #764ba2 100%);
}

.auth-header {
    text-align: center;
    margin-bottom: 40px;
}

.auth-header h1 {
    color: #2d3748;
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 15px;
}

.auth-header h1 i {
    color: #667eea;
    font-size: 2rem;
}

.auth-header p {
    color: #718096;
    font-size: 1.1rem;
    font-weight: 400;
}

.auth-tabs {
    display: flex;
    background: #f7fafc;
    border-radius: 12px;
    padding: 6px;
    margin-bottom: 30px;
}

.tab-btn {
    flex: 1;
    padding: 15px 20px;
    border: none;
    background: transparent;
    color: #718096;
    font-size: 1rem;
    font-weight: 500;
    cursor: pointer;
    border-radius: 8px;
    transition: all 0.3s ease;
}

.tab-btn.active {
    background: white;
    color: #667eea;
    box-shadow: 0 4px 12px rgba(102, 126, 234, 0.15);
}

.tab-btn:hover:not(.active) {
    color: #4a5568;
}

.auth-content {
    position: relative;
}

.auth-form {
    display: none;
    opacity: 0;
    transform: translateY(20px);
    transition: all 0.3s ease;
}

.auth-form.active {
    display: block;
    opacity: 1;
    transform: translateY(0);
}

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

.form-group label {
    display: block;
    margin-bottom: 8px;
    color: #4a5568;
    font-weight: 500;
    font-size: 0.95rem;
}

.form-group input {
    width: 100%;
    padding: 15px 18px;
    border: 2px solid #e2e8f0;
    border-radius: 12px;
    font-size: 1rem;
    transition: all 0.3s ease;
    background: #fafbfc;
}

.form-group input:focus {
    outline: none;
    border-color: #667eea;
    background: white;
    box-shadow: 0 0 0 3px rgba(102, 126, 234, 0.1);
}

.form-group input::placeholder {
    color: #a0aec0;
}

.btn-primary {
    width: 100%;
    padding: 16px 24px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    border: none;
    border-radius: 12px;
    font-size: 1.1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    margin-top: 10px;
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 10px 25px rgba(102, 126, 234, 0.3);
}

.btn-primary:active {
    transform: translateY(0);
}

.form-footer {
    text-align: center;
    margin-top: 20px;
}

.forgot-password {
    color: #667eea;
    text-decoration: none;
    font-size: 0.9rem;
    font-weight: 500;
    transition: color 0.3s ease;
}

.forgot-password:hover {
    color: #5a67d8;
    text-decoration: underline;
}

/* Анимации */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.auth-container {
    animation: fadeInUp 0.6s ease-out;
}

/* Адаптивность */
@media (max-width: 768px) {
    .auth-container {
        padding: 30px 20px;
        margin: 20px;
    }
    
    .auth-header h1 {
        font-size: 2rem;
    }
    
    .auth-header p {
        font-size: 1rem;
    }
}

/* Сообщения об ошибках */
.error-message {
    background: #fed7d7;
    color: #c53030;
    padding: 12px 16px;
    border-radius: 8px;
    margin-bottom: 20px;
    font-size: 0.9rem;
    border-left: 4px solid #c53030;
}

.success-message {
    background: #c6f6d5;
    color: #2f855a;
    padding: 12px 16px;
    border-radius: 8px;
    margin-bottom: 20px;
    font-size: 0.9rem;
    border-left: 4px solid #2f855a;
}

/* Загрузка */
.loading {
    opacity: 0.7;
    pointer-events: none;
}

.loading .btn-primary {
    position: relative;
}

.loading .btn-primary::after {
    content: '';
    position: absolute;
    width: 20px;
    height: 20px;
    top: 50%;
    left: 50%;
    margin-left: -10px;
    margin-top: -10px;
    border: 2px solid transparent;
    border-top: 2px solid white;
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}