:root {
    color-scheme: dark;
    --line: rgba(255,255,255,0.08);
    --line-strong: rgba(255,255,255,0.16);
    --text: #f5f5f5;
    --muted: #a8a8a8;
    --panel: rgba(8, 8, 8, 0.68);
    --input: rgba(255,255,255,0.04);
    --shadow: 0 20px 60px rgba(0,0,0,0.45);
    --radius: 22px;
}

* { box-sizing: border-box; }

html, body {
    margin: 0;
    min-height: 100%;
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Inter, Arial, sans-serif;
    color: var(--text);
    background:
        radial-gradient(circle at center, #2a2a2a 0%, #151515 28%, #090909 58%, #000 100%),
        linear-gradient(180deg, #090909 0%, #000 100%);
}

body {
    min-height: 100vh;
    display: grid;
    place-items: center;
    padding: 24px;
    overflow: hidden;
}

body::before,
body::after {
    content: "";
    position: fixed;
    inset: 0;
    pointer-events: none;
}

body::before {
    background:
        radial-gradient(circle at 50% 50%, rgba(255,255,255,0.1), transparent 34%),
        radial-gradient(circle at 20% 20%, rgba(255,255,255,0.05), transparent 22%),
        radial-gradient(circle at 80% 80%, rgba(255,255,255,0.04), transparent 24%);
    filter: blur(18px);
    animation: drift 12s ease-in-out infinite alternate;
}

body::after {
    background-image:
        linear-gradient(rgba(255,255,255,0.02) 1px, transparent 1px),
        linear-gradient(90deg, rgba(255,255,255,0.02) 1px, transparent 1px);
    background-size: 32px 32px;
    mask-image: radial-gradient(circle at center, black 25%, transparent 85%);
    opacity: 0.35;
}

.card {
    width: min(100%, 420px);
    padding: 34px;
    border-radius: var(--radius);
    background: var(--panel);
    border: 1px solid var(--line);
    box-shadow: var(--shadow);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    position: relative;
}

.card::before {
    content: "";
    position: absolute;
    inset: 0;
    border-radius: inherit;
    padding: 1px;
    background: linear-gradient(180deg, rgba(255,255,255,0.18), rgba(255,255,255,0.02));
    -webkit-mask: linear-gradient(#fff 0 0) content-box, linear-gradient(#fff 0 0);
    -webkit-mask-composite: xor;
    mask-composite: exclude;
    pointer-events: none;
}

.eyebrow {
    margin: 0 0 10px;
    color: var(--muted);
    font-size: 12px;
    letter-spacing: 0.24em;
    text-transform: uppercase;
}

h1 {
    margin: 0 0 26px;
    font-size: clamp(28px, 4vw, 34px);
    line-height: 1.05;
    font-weight: 650;
}

form {
    display: grid;
    gap: 14px;
}

label {
    display: grid;
    gap: 8px;
    font-size: 13px;
    color: var(--muted);
    letter-spacing: 0.02em;
}

input {
    width: 100%;
    border: 1px solid var(--line);
    background: var(--input);
    color: var(--text);
    border-radius: 14px;
    padding: 14px 15px;
    outline: none;
    transition: border-color .2s ease, background .2s ease, box-shadow .2s ease;
}

input::placeholder { color: #7d7d7d; }

input:focus {
    border-color: var(--line-strong);
    background: rgba(255,255,255,0.06);
    box-shadow: 0 0 0 4px rgba(255,255,255,0.05);
}

.button {
    margin-top: 8px;
    border: 1px solid rgba(255,255,255,0.16);
    background: linear-gradient(180deg, #fafafa 0%, #d9d9d9 100%);
    color: #050505;
    border-radius: 14px;
    padding: 14px 16px;
    font-size: 14px;
    font-weight: 700;
    letter-spacing: 0.04em;
    text-transform: uppercase;
    cursor: pointer;
    transition: transform .18s ease, filter .18s ease;
    box-shadow: 0 10px 30px rgba(255,255,255,0.08);
}

.button:hover { transform: translateY(-1px); filter: brightness(1.02); }
.button:active { transform: translateY(0); }

.error {
    margin: 4px 0 0;
    min-height: 20px;
    color: #f0f0f0;
    font-size: 13px;
    letter-spacing: 0.03em;
    text-transform: lowercase;
    opacity: 0.92;
}

.footer {
    margin-top: 18px;
    color: #8d8d8d;
    font-size: 12px;
    text-align: center;
    letter-spacing: 0.08em;
    text-transform: uppercase;
}

@keyframes drift {
    0% { transform: scale(1) translate3d(0, 0, 0); }
    100% { transform: scale(1.08) translate3d(0, -12px, 0); }
}

@media (max-width: 520px) {
    .card { padding: 26px 20px; border-radius: 18px; }
}