:root {
    --navy: #0b1f33;
    --navy-2: #102f4d;
    --gold: #d9a441;
    --teal: #4fb8b8;
    --paper: #f8f5ef;
    --white: #ffffff;
    --text: #1f2933;
    --muted: #5f6b7a;
    --border: rgba(15, 35, 55, 0.14);
    --shadow: 0 18px 45px rgba(0, 0, 0, 0.18);
}

* {
    box-sizing: border-box;
}

body {
    margin: 0;
    font-family: Arial, Helvetica, sans-serif;
    background:
        radial-gradient(circle at top left, rgba(79, 184, 184, 0.18), transparent 35%),
        linear-gradient(135deg, #071726, #0b1f33 45%, #102f4d);
    color: var(--text);
    min-height: 100vh;
}

.site-header {
    width: 100%;
    padding: 18px 22px;
}

.header-inner {
    max-width: 980px;
    margin: 0 auto;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 18px;
}

.brand-call {
    color: var(--white);
    font-size: 28px;
    font-weight: 800;
    letter-spacing: 2px;
}

.brand-subtitle {
    color: var(--gold);
    font-size: 14px;
    letter-spacing: 1px;
    margin-top: 3px;
}

.top-nav a {
    display: inline-block;
    color: var(--white);
    text-decoration: none;
    border: 1px solid rgba(255, 255, 255, 0.35);
    padding: 10px 16px;
    border-radius: 999px;
    font-weight: 700;
    background: rgba(255, 255, 255, 0.08);
}

.top-nav a:hover {
    background: rgba(255, 255, 255, 0.18);
}

.page-wrap {
    max-width: 980px;
    margin: 0 auto;
    padding: 18px 22px 28px;
}

.hero {
    text-align: center;
    color: var(--white);
    margin: 18px auto 22px;
    max-width: 760px;
}

.hero-badge {
    display: inline-block;
    color: var(--navy);
    background: var(--gold);
    font-weight: 800;
    letter-spacing: 1px;
    padding: 8px 16px;
    border-radius: 999px;
    margin-bottom: 16px;
}

.hero h1 {
    font-size: clamp(34px, 6vw, 58px);
    line-height: 1;
    margin: 0;
    letter-spacing: 1px;
}

.hero h2 {
    font-size: clamp(20px, 3vw, 30px);
    color: var(--teal);
    margin: 10px 0 20px;
    font-weight: 700;
}

.hero-text {
    font-size: 17px;
    line-height: 1.55;
    margin: 8px auto;
}

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

.hero .english {
    color: rgba(255, 255, 255, 0.78);
}

.card {
    background: var(--paper);
    max-width: 650px;
    margin: 0 auto;
    padding: 30px;
    border-radius: 22px;
    box-shadow: var(--shadow);
    border: 1px solid rgba(255, 255, 255, 0.38);
}

.form-group {
    margin-bottom: 20px;
}

label {
    display: block;
    color: var(--navy);
    font-weight: 800;
    font-size: 17px;
    margin-bottom: 3px;
}

.label-helper {
    display: block;
    color: var(--muted);
    font-size: 13px;
    margin-bottom: 8px;
}

input,
select {
    width: 100%;
    padding: 15px 14px;
    font-size: 18px;
    border: 1px solid var(--border);
    border-radius: 12px;
    background: var(--white);
    color: var(--text);
    outline: none;
}

input {
    text-align: center;
}

#callsign {
    text-transform: uppercase;
    letter-spacing: 1.5px;
    font-weight: 800;
}

input:focus,
select:focus {
    border-color: var(--teal);
    box-shadow: 0 0 0 4px rgba(79, 184, 184, 0.18);
}

button {
    width: 100%;
    display: block;
    margin-top: 8px;
    background: linear-gradient(135deg, var(--gold), #f0c466);
    color: var(--navy);
    border: none;
    padding: 16px 20px;
    font-size: 18px;
    border-radius: 14px;
    cursor: pointer;
    font-weight: 900;
    letter-spacing: 0.3px;
}

button span {
    display: block;
    font-size: 13px;
    font-weight: 700;
    margin-top: 3px;
    color: rgba(11, 31, 51, 0.78);
}

button:hover {
    filter: brightness(1.04);
}

.info-box {
    margin-top: 24px;
    padding: 18px;
    background: rgba(255, 255, 255, 0.72);
    border-radius: 16px;
    border: 1px solid var(--border);
}

.info-box p {
    margin: 6px 0;
    font-size: 15px;
    line-height: 1.45;
}

.callsign-box {
    font-size: 30px;
    font-weight: 900;
    color: #b21f2d;
    margin: 18px 0;
    letter-spacing: 1px;
}

.button-link {
    display: inline-block;
    margin-top: 18px;
    background: var(--navy);
    color: var(--white);
    padding: 13px 20px;
    border-radius: 12px;
    text-decoration: none;
    font-weight: 800;
}

.button-link:hover {
    background: var(--navy-2);
}

.site-footer {
    text-align: center;
    color: rgba(255, 255, 255, 0.72);
    padding: 20px;
}

.site-footer p {
    margin: 4px 0;
}

.site-footer a {
    color: var(--gold);
    text-decoration: none;
    font-weight: 800;
}

@media (max-width: 620px) {
    .header-inner {
        flex-direction: column;
        text-align: center;
    }

    .card {
        padding: 22px;
        border-radius: 18px;
    }

    input,
    select {
        font-size: 16px;
    }
}