:root {
    color-scheme: dark;
    --bg: #05070a;
    --ink: #f4f7fb;
    --muted: #9aa7b7;
    --line: rgba(255, 255, 255, .14);
    --line-strong: rgba(255, 255, 255, .28);
    --cyan: #47e3ff;
    --green: #72f7b2;
    --rose: #ff6f91;
    --panel: rgba(10, 16, 23, .74);
    --panel-hot: rgba(13, 29, 39, .86);
    --mono: 'JetBrains Mono', ui-monospace, SFMono-Regular, Menlo, monospace;
    --sans: 'Inter', system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
}

* {
    box-sizing: border-box;
}

html,
body {
    margin: 0;
    min-height: 100%;
}

body {
    background:
        repeating-linear-gradient(90deg, rgba(255, 255, 255, .035) 0 1px, transparent 1px 96px),
        repeating-linear-gradient(0deg, rgba(255, 255, 255, .025) 0 1px, transparent 1px 96px),
        linear-gradient(145deg, #030507, #08131a 52%, #05070a);
    color: var(--ink);
    font-family: var(--sans);
    letter-spacing: 0;
    overflow-x: hidden;
}

#signalCanvas {
    position: fixed;
    inset: 0;
    width: 100%;
    height: 100%;
    opacity: .82;
    pointer-events: none;
}

.home-stage,
.login-shell {
    position: relative;
    z-index: 1;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    justify-content: center;
    width: min(1120px, calc(100% - 40px));
    margin: 0 auto;
}

.home-stage {
    padding: 64px 0;
}

.eyebrow,
.lock-meta {
    margin: 0 0 16px;
    color: var(--green);
    font: 700 12px/1 var(--mono);
    text-transform: uppercase;
    letter-spacing: .18em;
}

h1 {
    margin: 0;
    max-width: 920px;
    font-size: clamp(44px, 8vw, 118px);
    line-height: .88;
    font-weight: 900;
    letter-spacing: 0;
}

.portal-grid {
    display: grid;
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 12px;
    margin-top: 54px;
}

.portal-link {
    min-height: 136px;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    padding: 18px;
    border: 1px solid var(--line);
    border-radius: 8px;
    background: var(--panel);
    color: var(--ink);
    text-decoration: none;
    font-size: 22px;
    font-weight: 800;
    box-shadow: inset 0 1px 0 rgba(255, 255, 255, .08);
    transition: transform .2s ease, border-color .2s ease, background .2s ease;
}

.portal-link span {
    color: var(--muted);
    font: 700 12px/1 var(--mono);
}

.portal-link:hover,
.portal-link:focus-visible {
    transform: translateY(-4px);
    border-color: var(--line-strong);
    background: var(--panel-hot);
    outline: none;
}

.portal-link.accent {
    border-color: rgba(71, 227, 255, .44);
    background: linear-gradient(135deg, rgba(71, 227, 255, .2), rgba(114, 247, 178, .12));
}

.login-shell {
    align-items: center;
    padding: 44px 0;
}

.brand-link {
    position: fixed;
    top: 26px;
    left: 28px;
    color: var(--ink);
    text-decoration: none;
    font: 900 18px/1 var(--sans);
}

.login-panel {
    width: min(430px, 100%);
    padding: 28px;
    border: 1px solid var(--line);
    border-radius: 8px;
    background: rgba(6, 12, 18, .84);
    box-shadow: 0 24px 88px rgba(0, 0, 0, .38), inset 0 1px 0 rgba(255, 255, 255, .08);
    backdrop-filter: blur(20px);
}

.login-panel h1 {
    font-size: 44px;
    line-height: 1;
    margin-bottom: 24px;
}

.login-panel label {
    display: block;
    margin-top: 16px;
}

.login-panel label span {
    display: block;
    margin-bottom: 8px;
    color: var(--muted);
    font: 700 11px/1 var(--mono);
    text-transform: uppercase;
    letter-spacing: .12em;
}

.login-panel input {
    width: 100%;
    height: 48px;
    border: 1px solid var(--line);
    border-radius: 8px;
    background: rgba(255, 255, 255, .06);
    color: var(--ink);
    font: 600 15px/1 var(--sans);
    padding: 0 14px;
    outline: none;
}

.login-panel input:focus {
    border-color: rgba(71, 227, 255, .74);
    box-shadow: 0 0 0 3px rgba(71, 227, 255, .12);
}

.login-panel button {
    width: 100%;
    height: 50px;
    margin-top: 22px;
    border: 0;
    border-radius: 8px;
    background: linear-gradient(135deg, var(--cyan), var(--green));
    color: #031015;
    font: 900 14px/1 var(--sans);
    cursor: pointer;
}

.login-error {
    margin: -8px 0 18px;
    color: var(--rose);
    font: 700 13px/1.2 var(--mono);
}

@media (max-width: 820px) {
    .portal-grid {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }

    .portal-link {
        min-height: 118px;
    }
}

@media (max-width: 520px) {
    .home-stage,
    .login-shell {
        width: min(100% - 28px, 1120px);
    }

    .portal-grid {
        grid-template-columns: 1fr;
        margin-top: 34px;
    }

    h1 {
        font-size: 46px;
    }
}