:root {
    --blue: #1f3c88;
    --blue-dark: #132b63;
    --red: #c92228;
    --gold: #f4b43f;
    --text: #222831;
    --muted: #6b7280;
    --light: #f5f7fb;
    --border: #dfe3eb;
    --white: #ffffff;
}
* { box-sizing: border-box; }
body {
    margin: 0;
    font-family: "Segoe UI", Arial, sans-serif;
    background: linear-gradient(135deg, #eef3ff, #ffffff 45%, #fff6f6);
    color: var(--text);
}
.page-wrap {
    max-width: 1080px;
    margin: 40px auto;
    padding: 0 18px 50px;
}
.hero-card, .membership-form, .alert {
    background: var(--white);
    border-radius: 18px;
    box-shadow: 0 18px 45px rgba(31, 60, 136, .10);
    border: 1px solid rgba(31, 60, 136, .08);
    overflow: hidden;
}
.hero-line { height: 8px; background: linear-gradient(90deg, var(--blue), var(--red), var(--gold)); }
.hero-content { padding: 34px 38px; }
.eyebrow {
    display: inline-block;
    padding: 6px 12px;
    border-radius: 999px;
    color: var(--blue);
    background: #edf2ff;
    font-weight: 700;
    font-size: 13px;
    text-transform: uppercase;
    letter-spacing: .06em;
}
h1 { margin: 14px 0 12px; color: var(--blue-dark); font-size: clamp(30px, 4vw, 46px); line-height: 1.08; }
p { color: var(--muted); margin: 0; }
.alert { padding: 15px 20px; margin: 18px 0; font-weight: 600; }
.alert.success { border-left: 5px solid #159947; color: #0f7a38; }
.alert.error { border-left: 5px solid var(--red); color: var(--red); }
.membership-form { margin-top: 22px; padding: 34px; }
.form-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 22px; }
.form-group { display: flex; flex-direction: column; gap: 8px; }
.span-2 { grid-column: span 2; }
label { font-weight: 700; color: #1f2937; }
label span { color: var(--red); }
.optional { color: var(--muted); font-weight: 500; }
input, select, textarea {
    width: 100%;
    padding: 14px 15px;
    border: 1px solid var(--border);
    border-radius: 12px;
    font-size: 15px;
    outline: none;
    background: #fff;
    transition: .2s ease;
}
input:focus, select:focus, textarea:focus {
    border-color: var(--blue);
    box-shadow: 0 0 0 4px rgba(31, 60, 136, .10);
}
textarea { resize: vertical; }
.fee-options { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 12px; }
.fee-card {
    border: 1px solid var(--border);
    border-radius: 14px;
    padding: 14px;
    display: grid;
    grid-template-columns: 22px 1fr auto;
    align-items: center;
    gap: 10px;
    cursor: pointer;
    transition: .2s ease;
    background: #fff;
}
.fee-card:hover { border-color: var(--blue); transform: translateY(-1px); }
.fee-card:has(input:checked) { border-color: var(--blue); background: #f1f5ff; box-shadow: 0 10px 22px rgba(31, 60, 136, .10); }
.fee-card input { width: auto; }
.fee-card strong { color: var(--red); white-space: nowrap; }
.amount-preview { margin-top: 10px; padding: 13px 15px; background: var(--light); border-radius: 12px; color: var(--blue-dark); }
.pledge-box { background: #f9fafc; border: 1px dashed var(--border); border-radius: 14px; padding: 18px; }
.checkbox-line { flex-direction: row; align-items: center; gap: 12px; display: flex; margin-top: 12px; }
.checkbox-line input { width: 18px; height: 18px; }
.form-footer { margin-top: 30px; display: flex; align-items: center; gap: 18px; flex-wrap: wrap; }
button {
    border: 0;
    background: linear-gradient(135deg, var(--blue), var(--blue-dark));
    color: #fff;
    padding: 15px 24px;
    border-radius: 12px;
    font-size: 16px;
    font-weight: 800;
    cursor: pointer;
    box-shadow: 0 12px 24px rgba(31, 60, 136, .22);
}
button:hover { filter: brightness(.96); }
button:disabled { opacity: .65; cursor: not-allowed; }
.form-footer p { font-size: 14px; }
.is-hidden { display: none; }
.error-field { border-color: var(--red) !important; }
@media (max-width: 760px) {
    .page-wrap { margin: 20px auto; }
    .hero-content, .membership-form { padding: 24px; }
    .form-grid, .fee-options { grid-template-columns: 1fr; }
    .span-2 { grid-column: span 1; }
    .fee-card { grid-template-columns: 22px 1fr; }
    .fee-card strong { grid-column: 2; }
}