/* Базовые стили */
body {
    margin: 0;
    padding: 0;
    font-family: 'Inter', 'Segoe UI', Roboto, Arial, sans-serif;
    background: linear-gradient(135deg, #f9fafb, #eef1f6);
    color: #333;
    display: flex;
    align-items: center;
    justify-content: center;
    height: 100vh;
}

/* Карточка контейнера */
.container {
    max-width: 450px;
    width: 100%;
    background: #fff;
    padding: 32px;
    border-radius: 16px;
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.08);
    animation: fadeIn 0.6s ease-in-out;
}

/* Заголовок */
h1 {
    font-size: 1.8rem;
    font-weight: 700;
    text-align: center;
    margin-bottom: 24px;
    color: #222;
}

/* Поля ввода */
.form-group {
    margin-bottom: 18px;
}

label {
    display: block;
    margin-bottom: 6px;
    font-weight: 600;
    font-size: 0.95rem;
    color: #444;
}

input[type="text"],
input[type="password"] {
    width: 100%;
    padding: 12px 14px;
    border: 1px solid #d1d5db;
    border-radius: 8px;
    font-size: 1rem;
    box-sizing: border-box;
    transition: all 0.2s ease-in-out;
}

input[type="text"]:focus,
input[type="password"]:focus {
    border-color: #3b82f6;
    box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.3);
    outline: none;
}

/* Чекбокс */
.checkbox {
    display: flex;
    align-items: center;
    gap: 8px;
    margin-top: 4px;
}

/* Кнопка */
button {
    width: 100%;
    padding: 14px;
    background: #3b82f6;
    color: #fff;
    border: none;
    border-radius: 10px;
    cursor: pointer;
    font-size: 1rem;
    font-weight: 600;
    transition: background 0.3s ease, transform 0.1s ease;
    margin-top: 10px;
}

button:hover {
    background: #2563eb;
    transform: translateY(-2px);
}

button:active {
    transform: translateY(0);
}

/* Анимация появления */
@keyframes fadeIn {
    from { opacity: 0; transform: translateY(10px); }
    to { opacity: 1; transform: translateY(0); }
}