/* Кастомные CSS переменные для современного дизайна */
:root {
    --primary-color: #4f46e5;
    --primary-hover: #4338ca;
    --secondary-color: #7c3aed;
    --success-color: #10b981;
    --danger-color: #ef4444;
    --warning-color: #f59e0b;
    --info-color: #3b82f6;
    --light-bg: #f8fafc;
    --dark-bg: #1e293b;
    --card-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    --card-shadow-hover: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
    --border-radius: 0.75rem;
    --transition: all 0.3s ease;
}

/* Общие стили для body */
body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    min-height: 100vh;
    background-attachment: fixed;
}

/* Навбар улучшения */
.navbar-dark {
    background: rgba(30, 41, 59, 0.95) !important;
    backdrop-filter: blur(10px);
    box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
    padding: 1rem 0;
}

.navbar-brand {
    font-weight: 700;
    font-size: 1.5rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    transition: var(--transition);
}

.navbar-brand:hover {
    transform: translateY(-2px);
}

.navbar-brand .logo {
    width: 120px;
    height: 48px;
    object-fit: contain;
}

.nav-link {
    font-weight: 500;
    transition: var(--transition);
    position: relative;
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: -5px;
    left: 50%;
    transform: translateX(-50%);
    width: 0;
    height: 2px;
    background: var(--primary-color);
    transition: var(--transition);
}

.nav-link:hover::after {
    width: 80%;
}

/* Главный контент */
main {
    padding: 2rem 0;
}

main .bg-white {
    background: white !important;
    border-radius: var(--border-radius);
    box-shadow: var(--card-shadow);
    padding: 2.5rem !important;
}

/* Карточки */
.card {
    border: none;
    border-radius: var(--border-radius);
    box-shadow: var(--card-shadow);
    transition: var(--transition);
    overflow: hidden;
}

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

.card-header {
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--secondary-color) 100%);
    color: white;
    border: none;
    padding: 1.25rem;
    font-weight: 600;
}

.card-header h4, .card-header h5 {
    margin: 0;
    color: white;
}

.card-body {
    padding: 1.5rem;
}

.list-group-item {
    border-left: none;
    border-right: none;
    padding: 1rem 1.5rem;
    transition: var(--transition);
}

.list-group-item:hover {
    background-color: #f8fafc;
    padding-left: 1.75rem;
}

.list-group-item:first-child {
    border-top: none;
}

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

/* Кнопки */
.btn {
    border-radius: 0.5rem;
    padding: 0.625rem 1.5rem;
    font-weight: 600;
    transition: var(--transition);
    border: none;
    box-shadow: 0 1px 3px 0 rgba(0, 0, 0, 0.1);
}

.btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
}

.btn-primary {
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--secondary-color) 100%);
}

.btn-primary:hover {
    background: linear-gradient(135deg, var(--primary-hover) 0%, #6d28d9 100%);
}

.btn-lg {
    padding: 0.875rem 2rem;
    font-size: 1.125rem;
}

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

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

.btn-outline-light {
    border: 2px solid white;
}

.btn-outline-light:hover {
    background: white;
    color: var(--dark-bg);
}

/* Формы */
.form-control, .form-select {
    border-radius: 0.5rem;
    border: 2px solid #e2e8f0;
    padding: 0.75rem 1rem;
    transition: var(--transition);
}

.form-control:focus, .form-select:focus {
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(79, 70, 229, 0.1);
}

.form-label {
    font-weight: 600;
    margin-bottom: 0.5rem;
    color: #334155;
}

/* Алерты */
.alert {
    border-radius: var(--border-radius);
    border: none;
    padding: 1rem 1.5rem;
    box-shadow: var(--card-shadow);
}

.alert-info {
    background: linear-gradient(135deg, #e0f2fe 0%, #ddd6fe 100%);
    color: #1e40af;
}

.alert-danger {
    background: linear-gradient(135deg, #fee2e2 0%, #fecaca 100%);
    color: #991b1b;
}

.alert-success {
    background: linear-gradient(135deg, #d1fae5 0%, #a7f3d0 100%);
    color: #065f46;
}

/* Заголовки */
h1, h2, h3, h4, h5, h6 {
    font-weight: 700;
    color: #1e293b;
}

.display-4 {
    font-weight: 800;
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--secondary-color) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.lead {
    font-size: 1.25rem;
    font-weight: 500;
}

/* Цены */
.pricing-card-title {
    font-size: 3rem;
    font-weight: 800;
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--secondary-color) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

/* Спиннер */
.spinner-border {
    border-color: var(--primary-color);
    border-right-color: transparent;
}

/* Иконки для кнопок */
.btn i {
    margin-right: 0.5rem;
}

/* Ссылки */
a {
    color: var(--primary-color);
    text-decoration: none;
    transition: var(--transition);
}

a:hover {
    color: var(--primary-hover);
    text-decoration: underline;
}

/* Блок условий и соглашений */
.terms-links {
    background: linear-gradient(135deg, #f8fafc 0%, #e0e7ff 100%);
    border-radius: var(--border-radius);
    padding: 1.5rem;
    margin-top: 1rem;
}

.terms-links h5 {
    color: var(--primary-color);
    margin-bottom: 1rem;
    font-weight: 700;
}

.terms-links .list-unstyled {
    margin: 0;
}

.terms-links .list-unstyled li {
    padding: 0.5rem 0;
    border-bottom: 1px solid rgba(79, 70, 229, 0.1);
}

.terms-links .list-unstyled li:last-child {
    border-bottom: none;
}

.terms-links a {
    color: var(--primary-color);
    font-weight: 500;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.terms-links a:hover {
    color: var(--primary-hover);
    text-decoration: none;
}

.terms-links a::before {
    content: '📄';
    font-size: 1.2rem;
}

/* Адаптивность */
@media (max-width: 768px) {
    main .bg-white {
        padding: 1.5rem !important;
    }
    
    .btn-lg {
        padding: 0.75rem 1.5rem;
        font-size: 1rem;
    }
    
    .display-4 {
        font-size: 2.5rem;
    }
}

/* Анимация загрузки */
@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.card, .alert, main .bg-white {
    animation: fadeIn 0.6s ease-out;
}

/* Hover эффекты для списков */
.list-group-item a {
    color: var(--primary-color);
    font-weight: 500;
    transition: var(--transition);
}

.list-group-item a:hover {
    color: var(--primary-hover);
    padding-left: 0.5rem;
}

/* Стили для ошибок валидации форм */
.errorlist {
    list-style: none;
    padding: 0;
    margin: 0.5rem 0 1rem 0;
}

.errorlist li {
    background: linear-gradient(135deg, #fee2e2 0%, #fecaca 100%);
    color: #991b1b;
    padding: 0.75rem 1rem;
    border-radius: 0.5rem;
    margin-bottom: 0.5rem;
    font-weight: 600;
    box-shadow: 0 2px 4px rgba(239, 68, 68, 0.1);
    border-left: 4px solid #ef4444;
}

/* Стили для текста помощи (helptext) */
.helptext {
    display: block;
    color: #64748b;
    font-size: 0.875rem;
    margin-top: 0.25rem;
    font-weight: 400;
}

/* Поля с ошибками */
input.error, select.error, textarea.error {
    border-color: #ef4444 !important;
    box-shadow: 0 0 0 3px rgba(239, 68, 68, 0.1) !important;
}

/* Улучшение отображения полей формы Django */
form p {
    margin-bottom: 1.5rem;
}

form p label {
    display: block;
    font-weight: 600;
    margin-bottom: 0.5rem;
    color: #334155;
}

form p input[type="text"],
form p input[type="email"],
form p input[type="password"] {
    width: 100%;
    padding: 0.75rem 1rem;
    border: 2px solid #e2e8f0;
    border-radius: 0.5rem;
    transition: var(--transition);
}

form p input[type="text"]:focus,
form p input[type="email"]:focus,
form p input[type="password"]:focus {
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(79, 70, 229, 0.1);
    outline: none;
}