* {
    box-sizing: border-box;
}

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background: #f4f7f2;
    color: #2e3b2c;
    margin: 0;
    padding: 20px;
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
}

main {
    background: #ffffff;
    max-width: 550px;
    width: 100%;
    padding: 40px 30px;
    border-radius: 24px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.05);
    border: 1px solid #e0e8db;
}

header h1 {
    font-size: 26px;
    font-weight: 600;
    margin: 0 0 8px;
    color: #1e2b1c;
    text-align: center;
    letter-spacing: 1px;
}

header p {
    text-align: center;
    color: #6b7c68;
    font-size: 15px;
    margin: 0 0 30px;
    line-height: 1.5;
}

section {
    background: #f0f5ec;
    padding: 15px 20px;
    border-radius: 16px;
    margin-bottom: 25px;
    font-size: 15px;
    color: #3d4f3a;
    text-align: center;
    border-left: 4px solid #8fae7e;
}

section p {
    margin: 4px 0;
}

section strong {
    color: #1e2b1c;
}

form p {
    margin: 0 0 20px;
}

label {
    display: block;
    margin-bottom: 6px;
    font-weight: 500;
    font-size: 14px;
    color: #3d4f3a;
}

input,
select {
    width: 100%;
    padding: 14px 16px;
    border: 1px solid #d0dcc9;
    border-radius: 12px;
    font-size: 16px;
    background: #fafcf9;
    font-family: inherit;
    transition: border-color 0.2s, box-shadow 0.2s;
}

input:focus,
select:focus {
    outline: none;
    border-color: #8fae7e;
    box-shadow: 0 0 0 3px rgba(143, 174, 126, 0.2);
    background: #ffffff;
}

input.invalid,
select.invalid {
    border-color: #c0392b;
    background: #fdf2f0;
}

.error {
    display: block;
    color: #c0392b;
    font-size: 13px;
    margin-top: 4px;
    min-height: 16px;
}

button {
    width: 100%;
    padding: 16px;
    background: #5a7a4e;
    color: #ffffff;
    border: none;
    border-radius: 12px;
    font-size: 18px;
    font-weight: 600;
    cursor: pointer;
    letter-spacing: 0.5px;
    transition: background 0.2s, transform 0.1s;
}

button:hover {
    background: #4a6840;
}

button:active {
    transform: scale(0.98);
}

button:disabled {
    background: #a8b8a0;
    cursor: not-allowed;
}

#formStatus {
    text-align: center;
    font-size: 14px;
    color: #5a7a4e;
    margin: 0;
    min-height: 20px;
}

footer p {
    text-align: center;
    font-size: 12px;
    color: #8a9a86;
    margin-top: 25px;
    line-height: 1.5;
}

.hidden-field {
    display: none;
}

/* Планшеты и небольшие ноутбуки */
@media (max-width: 600px) {
    body {
        padding: 12px;
        align-items: flex-start; /* чтобы длинная форма не центрировалась по вертикали с обрезкой */
    }

    main {
        padding: 28px 20px;
        border-radius: 20px;
    }

    header h1 {
        font-size: 22px;
        letter-spacing: 0.5px;
    }

    header p {
        font-size: 14px;
        margin-bottom: 22px;
    }

    section {
        padding: 12px 16px;
        font-size: 14px;
    }
}

/* Узкие телефоны */
@media (max-width: 380px) {
    body {
        padding: 8px;
    }

    main {
        padding: 22px 14px;
        border-radius: 16px;
    }

    header h1 {
        font-size: 20px;
    }

    input,
    select {
        padding: 12px 14px;
        font-size: 16px; /* не уменьшать ниже 16px — иначе зум на iOS */
    }

    button {
        padding: 14px;
        font-size: 16px;
    }

    footer p {
        font-size: 11px;
    }
}

header h1,
header p,
section p {
    overflow-wrap: break-word;
    word-wrap: break-word;
    hyphens: auto;
}