:root {
    color-scheme: dark;
    --bg: #031522;
    --panel: rgba(3, 26, 42, 0.86);
    --panel-soft: rgba(8, 44, 65, 0.62);
    --line: rgba(37, 219, 255, 0.34);
    --cyan: #22d7ff;
    --text: #edfaff;
    --muted: #aac4cf;
}

* {
    box-sizing: border-box;
}

body {
    margin: 0;
    min-height: 100vh;
    font-family: Inter, Segoe UI, Arial, sans-serif;
    color: var(--text);
    background:
        radial-gradient(circle at 72% 16%, rgba(34, 215, 255, 0.18), transparent 30%),
        linear-gradient(135deg, #031522, #061d2d 58%, #020b12);
}

body::before {
    content: "";
    position: fixed;
    inset: 0;
    pointer-events: none;
    background-image:
        linear-gradient(rgba(34, 215, 255, 0.08) 1px, transparent 1px),
        linear-gradient(90deg, rgba(34, 215, 255, 0.08) 1px, transparent 1px);
    background-size: 44px 44px;
}

a {
    color: inherit;
    text-decoration: none;
}

.site-header {
    position: relative;
    z-index: 2;
    display: flex;
    align-items: flex-start;
    justify-content: space-between;
    gap: 32px;
    padding: clamp(22px, 3vw, 42px) clamp(20px, 5vw, 72px) 0;
}

.brand {
    display: flex;
    align-items: center;
    gap: 9px;
    color: var(--cyan);
    text-decoration: none;
}

.brand-icon {
    display: block;
    width: 42px;
    height: 26px;
    object-fit: contain;
    flex-shrink: 0;
    filter: drop-shadow(0 0 5px rgba(34, 215, 255, 0.5));
    transition: filter 180ms ease;
}

.brand:hover .brand-icon {
    filter: drop-shadow(0 0 8px rgba(34, 215, 255, 0.8));
}

.brand-text {
    font-size: 0.94rem;
    font-weight: 800;
    letter-spacing: 0.04em;
    background: linear-gradient(90deg, #edfaff 15%, var(--cyan) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

nav {
    display: flex;
    align-items: center;
    gap: 4px;
    padding: 4px;
    border: 1px solid rgba(37, 219, 255, 0.2);
    border-radius: 8px;
    color: var(--muted);
    background: rgba(1, 13, 22, 0.66);
    box-shadow: 0 16px 42px rgba(0, 0, 0, 0.22);
    backdrop-filter: blur(14px);
}

nav a {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-height: 34px;
    padding: 0 14px;
    border: 1px solid transparent;
    border-radius: 6px;
    transition: color 160ms ease, background 160ms ease, border-color 160ms ease;
}

nav a:hover,
nav a:focus-visible,
nav a[aria-current="page"] {
    color: var(--cyan);
    background: rgba(34, 215, 255, 0.12);
    border-color: rgba(37, 219, 255, 0.36);
}

nav a:focus-visible {
    outline: 2px solid rgba(34, 215, 255, 0.7);
    outline-offset: 2px;
}

.survey-shell {
    position: relative;
    z-index: 1;
    display: flex;
    justify-content: center;
    width: min(760px, calc(100% - 40px));
    margin: -138px auto 48px;
}

.brand-group {
    display: flex;
    flex-direction: column;
    gap: 32px;
}

.intro {
    padding-top: 0;
    max-width: min(420px, 100%);
}

.brand-group .intro {
    max-width: 185px;
}

.brand-group .intro p:not(.eyebrow) {
    max-width: 100%;
    font-size: 0.8rem;
}

.brand-group h1 {
    font-size: clamp(1.4rem, 2.4vw, 2rem);
}

.eyebrow {
    margin: 0 0 8px;
    color: var(--cyan);
    font-weight: 800;
    text-transform: uppercase;
    letter-spacing: 0.14em;
    font-size: 0.72rem;
}

h1 {
    margin: 0;
    font-size: clamp(1.8rem, 3.2vw, 3.1rem);
    line-height: 0.94;
}

.intro p:not(.eyebrow) {
    max-width: 360px;
    color: var(--muted);
    font-size: 1rem;
    line-height: 1.45;
}

.survey-wizard {
    width: 100%;
}

.survey-form {
    display: grid;
    gap: 16px;
    padding: clamp(18px, 3vw, 30px);
    border: 1px solid var(--line);
    border-radius: 8px;
    background: var(--panel);
    box-shadow: inset 0 0 48px rgba(34, 215, 255, 0.08);
}

label {
    display: grid;
    gap: 8px;
    color: var(--muted);
    font-weight: 700;
}

label span {
    display: grid;
    grid-template-columns: 1fr auto;
    align-items: center;
    gap: 10px;
}

input[type="number"] {
    width: 100%;
    min-height: 46px;
    border: 1px solid var(--line);
    border-radius: 6px;
    padding: 0 12px;
    color: var(--text);
    background: var(--panel-soft);
    font: inherit;
}

fieldset {
    display: grid;
    gap: 10px;
    margin: 8px 0 0;
    padding: 16px;
    border: 1px solid var(--line);
    border-radius: 8px;
}

legend {
    padding: 0 8px;
    color: var(--cyan);
    font-weight: 800;
}

.radio-row {
    display: flex;
    align-items: center;
    gap: 10px;
}

.form-actions {
    display: flex;
    flex-wrap: wrap;
    gap: 12px;
    margin-top: 8px;
}

button,
.form-actions a {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-height: 46px;
    padding: 0 18px;
    border: 1px solid var(--line);
    border-radius: 6px;
    color: #00131c;
    background: var(--cyan);
    font: inherit;
    font-weight: 800;
    cursor: pointer;
}

.form-actions a {
    color: var(--cyan);
    background: transparent;
}

@media (max-width: 820px) {
    .site-header,
    .survey-shell {
        grid-template-columns: 1fr;
    }

    .site-header {
        align-items: flex-start;
        flex-direction: column;
    }

    nav {
        flex-wrap: wrap;
        max-width: 100%;
    }

    .survey-shell {
        margin-top: 12px;
    }
}