:root {
    --bg: #f3f5f8;
    --card: #ffffff;
    --text: #1d2733;
    --muted: #5b6775;
    --border: #d6dde6;
    --accent: #173a63;
    --accent-2: #0d5ea6;
    --success: #e9f8ee;
    --success-border: #7bc38e;
    --error: #fff1f0;
    --error-border: #db7b76;
    --shadow: 0 10px 25px rgba(16, 24, 40, 0.06);
}

* {
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    margin: 0;
    font-family: Arial, Helvetica, sans-serif;
    color: var(--text);
    background: linear-gradient(180deg, #eef2f6 0%, #f7f9fb 100%);
    line-height: 1.6;
}

.page-shell {
    max-width: 1120px;
    margin: 0 auto;
    padding: 32px 20px 60px;
}

.card {
    background: var(--card);
    border: 1px solid var(--border);
    border-radius: 18px;
    box-shadow: var(--shadow);
    padding: 28px;
    margin-bottom: 24px;
}

.letterhead {
    display: flex;
    justify-content: space-between;
    gap: 24px;
    align-items: flex-start;
}

.letterhead h1,
.hero h2,
.card h3,
.card h4 {
    margin-top: 0;
    color: var(--accent);
}

.contact-block {
    min-width: 220px;
    text-align: right;
}

.date-line {
    color: var(--muted);
    font-weight: bold;
}

.grid {
    display: grid;
    gap: 18px;
}

.two-col {
    grid-template-columns: repeat(2, minmax(0, 1fr));
}

.field {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

label {
    font-weight: 700;
}

label span {
    color: #b42318;
}

input,
textarea {
    width: 100%;
    padding: 12px 14px;
    border: 1px solid var(--border);
    border-radius: 12px;
    font: inherit;
    color: var(--text);
    background: #fff;
}

input:focus,
textarea:focus {
    outline: 3px solid rgba(13, 94, 166, 0.14);
    border-color: var(--accent-2);
}

.option-box {
    border: 1px solid var(--border);
    border-radius: 16px;
    padding: 18px;
    margin: 22px 0;
}

.option-box legend {
    padding: 0 8px;
    font-weight: 700;
    color: var(--accent);
}

.checkbox-row {
    display: flex;
    gap: 12px;
    align-items: flex-start;
    font-weight: 400;
}

.checkbox-row input {
    width: 18px;
    height: 18px;
    margin-top: 4px;
}

.initials-field {
    max-width: 260px;
    margin-top: 16px;
}

button {
    appearance: none;
    border: none;
    background: var(--accent);
    color: white;
    padding: 14px 20px;
    border-radius: 12px;
    font: inherit;
    font-weight: 700;
    cursor: pointer;
    transition: transform 0.15s ease, background 0.15s ease;
}

button:hover {
    background: var(--accent-2);
    transform: translateY(-1px);
}

.notice {
    padding: 14px 16px;
    border-radius: 12px;
    margin-bottom: 16px;
    font-weight: 700;
}

.notice.success {
    background: var(--success);
    border: 1px solid var(--success-border);
}

.notice.error {
    background: var(--error);
    border: 1px solid var(--error-border);
}

.document-copy p,
.document-copy li,
.exhibit p,
.exhibit li {
    margin-top: 0;
}

.signature-block,
.signature-lines {
    margin-top: 24px;
}

.signature-lines {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 24px;
}

.rates-grid {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 24px;
}

.muted {
    color: var(--muted);
}

ul {
    padding-left: 20px;
}

@media (max-width: 800px) {
    .letterhead,
    .two-col,
    .signature-lines,
    .rates-grid {
        grid-template-columns: 1fr;
        display: grid;
    }

    .letterhead {
        gap: 12px;
    }

    .contact-block {
        text-align: left;
        min-width: 0;
    }
}

@media print {
    body {
        background: #fff;
    }

    .page-shell {
        max-width: none;
        padding: 0;
    }

    .card {
        box-shadow: none;
        border-radius: 0;
        border: 1px solid #bbb;
        margin-bottom: 12px;
    }

    button {
        display: none;
    }
}