:root {
    color-scheme: dark;
    font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
    background: #080b0d;
    color: #f4f7f6;
}

* { box-sizing: border-box; }

body {
    min-width: 20rem;
    min-height: 100vh;
    margin: 0;
    background: radial-gradient(circle at 50% 0, #12362d 0, #0b1211 34rem, #080b0d 70rem);
    font-size: 1rem;
    line-height: 1.5;
}

a { color: #6ee7b7; }

.auth-header {
    min-height: 4.5rem;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 1rem;
    padding: 1rem clamp(1.25rem, 4vw, 3rem);
    border-bottom: 1px solid #23322e;
    background: rgba(8, 11, 13, 0.82);
}

.auth-header nav { display: flex; gap: 1rem; }
.brand { color: #fff; font-size: 1.125rem; font-weight: 750; text-decoration: none; }
.brand span { color: #34d399; margin-right: 0.35rem; }

.auth-shell {
    width: min(100% - 2rem, 34rem);
    margin: 0 auto;
    padding: clamp(2.5rem, 8vw, 6rem) 0;
}

.auth-card {
    padding: clamp(1.5rem, 6vw, 3rem);
    border: 1px solid #2a3b36;
    border-radius: 1rem;
    background: rgba(17, 25, 23, 0.94);
    box-shadow: 0 2rem 6rem rgba(0, 0, 0, 0.38);
}

.eyebrow { color: #6ee7b7; font-size: 0.8125rem; font-weight: 750; letter-spacing: 0.12em; text-transform: uppercase; }
h1 { margin: 0 0 1rem; font-size: clamp(2rem, 8vw, 2.8rem); line-height: 1.06; letter-spacing: -0.04em; }
h2 { margin-top: 2rem; }
.intro { color: #aab8b4; margin-bottom: 2rem; }

.auth-form, .auth-card form { display: grid; gap: 1.25rem; }
.field { display: grid; gap: 0.45rem; }
label { font-weight: 650; }
input:not([type="checkbox"]):not([type="radio"]) {
    width: 100%;
    min-height: 2.75rem;
    padding: 0.7rem 0.8rem;
    border: 1px solid #3a4c47;
    border-radius: 0.55rem;
    background: #0c1210;
    color: #fff;
    font: inherit;
}
input:focus { outline: 2px solid #34d399; outline-offset: 2px; }
button, .auth-card a[role="button"] {
    min-height: 2.75rem;
    padding: 0.7rem 1rem;
    border: 0;
    border-radius: 0.55rem;
    background: #059669;
    color: #fff;
    cursor: pointer;
    font: inherit;
    font-weight: 700;
}
button:hover { background: #047857; }
.error, .errorlist, .form-errors { color: #fca5a5; }
.messages { margin-bottom: 1rem; padding: 0.75rem 1rem; border: 1px solid #2d6b57; border-radius: 0.6rem; background: #113a2e; }
.messages p { margin: 0; }
.auth-card img { display: block; width: min(100%, 18rem); height: auto; margin: 1.5rem auto; padding: 0.75rem; border-radius: 0.75rem; background: #fff; }
.auth-card ul { padding-left: 1.25rem; }