:root {
    color-scheme: dark;
    --background: #080b12;
    --card: rgba(18, 23, 35, 0.88);
    --text: #f8fafc;
    --muted: #9ca8ba;
    --accent: #72f1b8;
    --accent-dark: #071d16;
    --border: rgba(255, 255, 255, 0.1);
    font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

* { box-sizing: border-box; }

body {
    margin: 0;
    min-height: 100vh;
    color: var(--text);
    background:
        radial-gradient(circle at 15% 15%, rgba(39, 119, 91, 0.32), transparent 30rem),
        radial-gradient(circle at 85% 80%, rgba(45, 68, 140, 0.25), transparent 28rem),
        var(--background);
}

body::before {
    content: "";
    position: fixed;
    inset: 0;
    pointer-events: none;
    opacity: 0.16;
    background-image: linear-gradient(rgba(255,255,255,.05) 1px, transparent 1px), linear-gradient(90deg, rgba(255,255,255,.05) 1px, transparent 1px);
    background-size: 48px 48px;
}

.container {
    min-height: 100vh;
    display: grid;
    place-items: center;
    padding: 32px 20px;
}

.card {
    position: relative;
    width: min(780px, 100%);
    padding: clamp(28px, 6vw, 64px);
    border: 1px solid var(--border);
    border-radius: 28px;
    background: var(--card);
    box-shadow: 0 30px 80px rgba(0, 0, 0, 0.42);
    backdrop-filter: blur(18px);
}

.brand { font-weight: 800; font-size: 1.35rem; letter-spacing: -0.04em; margin-bottom: 70px; }
.brand span, h1 span { color: var(--accent); }
.eyebrow { color: var(--accent); text-transform: uppercase; letter-spacing: .16em; font-size: .72rem; font-weight: 800; }
h1 { font-size: clamp(2.5rem, 7vw, 5rem); line-height: .98; letter-spacing: -.065em; margin: 14px 0 24px; }
.intro { color: var(--muted); font-size: 1.08rem; line-height: 1.65; max-width: 560px; margin-bottom: 38px; }
label { display: block; font-size: .78rem; font-weight: 700; margin-bottom: 9px; color: #cbd5e1; }
.form-row { display: flex; gap: 10px; }
input {
    width: 100%; min-width: 0; border: 1px solid var(--border); border-radius: 13px; padding: 17px 18px;
    color: var(--text); background: rgba(2, 6, 14, .62); outline: none; font-size: 1rem;
}
input:focus { border-color: var(--accent); box-shadow: 0 0 0 3px rgba(114, 241, 184, .12); }
button, .button-link {
    border: 0; border-radius: 13px; padding: 0 24px; background: var(--accent); color: var(--accent-dark);
    font-weight: 800; font-size: .94rem; cursor: pointer; transition: transform .15s, filter .15s; text-decoration: none;
}
button:hover, .button-link:hover { transform: translateY(-1px); filter: brightness(1.08); }
.message { margin-top: 14px; padding: 14px 16px; border-radius: 12px; }
.error { color: #fecaca; background: rgba(127, 29, 29, .25); border: 1px solid rgba(248, 113, 113, .25); }
.result { display: flex; align-items: center; justify-content: space-between; gap: 16px; margin-top: 18px; padding: 16px 18px; border: 1px solid rgba(114, 241, 184, .25); border-radius: 14px; background: rgba(114, 241, 184, .07); }
.result span { display: block; color: var(--muted); font-size: .72rem; margin-bottom: 4px; }
.result a { color: var(--accent); font-weight: 700; overflow-wrap: anywhere; }
.copy { padding: 10px 17px; flex: 0 0 auto; }
.features { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; border-top: 1px solid var(--border); margin-top: 48px; padding-top: 28px; }
.features strong, .features span { display: block; }
.features strong { font-size: .86rem; margin-bottom: 4px; }
.features span { color: var(--muted); font-size: .75rem; }
.not-found { padding-bottom: 40px; }
.not-found p:not(.eyebrow) { color: var(--muted); margin-bottom: 32px; }
.button-link { display: inline-block; padding: 14px 20px; }

@media (max-width: 600px) {
    .card { border-radius: 20px; }
    .brand { margin-bottom: 48px; }
    .form-row { flex-direction: column; }
    .form-row button { padding: 16px; }
    .features { grid-template-columns: 1fr; gap: 16px; }
    .result { align-items: flex-start; flex-direction: column; }
}