:root {
    --font-display: -apple-system, "Segoe UI Semibold", "Segoe UI", "Helvetica Neue", Arial, sans-serif;
    --font-body: -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    --font-mono: ui-monospace, "SF Mono", "Cascadia Mono", "Consolas", "Roboto Mono", monospace;
 
    --ink-900: #0F1116;
    --ink-800: #181B22;
    --ink-700: #22262F;
    --line: #2E323C;
 
    --text-main: #ECEDF2;
    --text-muted: #8B8FA3;
 
    --foil-teal: #4FD8C4;
    --foil-violet: #9B7EDE;
    --foil-amber: #E8B84B;
 
    --danger: #E8637A;
}
* {
    box-sizing: border-box;
}
 
body {
    margin: 0;
    min-height: 100vh;
    background: var(--ink-900);
    background-image:
        radial-gradient(circle at 15% 10%, rgba(79, 216, 196, 0.06), transparent 40%),
        radial-gradient(circle at 85% 85%, rgba(155, 126, 222, 0.07), transparent 45%);
    color: var(--text-main);
    font-family: var(--font-body);
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 24px;
}
 
.vault-scene {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 20px;
    width: 100%;
}
 
.vault-card {
    position: relative;
    width: 100%;
    max-width: 400px;
    background: var(--ink-800);
    border: 1px solid var(--line);
    border-radius: 18px;
    padding: 40px 32px 32px;
    overflow: hidden;
    box-shadow: 0 30px 60px -20px rgba(0, 0, 0, 0.6);
}
 
/* Signature element: a thin foil-gradient seam across the top edge,
   like the holo strip on a trading card sleeve. Animates very subtly
   on hover so it reads as "foil" rather than a static gradient bar. */
.vault-foil-edge {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 5px;
    background: linear-gradient(
        90deg,
        var(--foil-teal),
        var(--foil-violet),
        var(--foil-amber),
        var(--foil-violet),
        var(--foil-teal)
    );
    background-size: 200% 100%;
    animation: foil-drift 8s linear infinite;
}
 
@keyframes foil-drift {
    0%   { background-position: 0% 0%; }
    100% { background-position: 200% 0%; }
}
 
.vault-header {
    margin-bottom: 28px;
}
 
.vault-kicker {
    display: block;
    font-family: var(--font-mono);
    font-size: 11px;
    letter-spacing: 0.14em;
    color: var(--foil-teal);
    margin-bottom: 14px;
}
 
.vault-title {
    font-family: var(--font-display);
    font-weight: 700;
    font-size: 28px;
    line-height: 1.15;
    margin: 0 0 8px;
    letter-spacing: -0.01em;
}
 
.vault-sub {
    margin: 0;
    font-size: 14px;
    color: var(--text-muted);
    line-height: 1.5;
}
 
.vault-error {
    background: rgba(232, 99, 122, 0.12);
    border: 1px solid rgba(232, 99, 122, 0.35);
    color: var(--danger);
    font-size: 13px;
    padding: 10px 14px;
    border-radius: 10px;
    margin-bottom: 20px;
}
 
.vault-form {
    display: flex;
    flex-direction: column;
    gap: 18px;
}
 
.vault-field {
    display: flex;
    flex-direction: column;
    gap: 8px;
}
 
.vault-field label {
    font-family: var(--font-mono);
    font-size: 11px;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    color: var(--text-muted);
}
 
.vault-select-wrap {
    position: relative;
}
 
.vault-select-wrap::after {
    content: '';
    position: absolute;
    right: 16px;
    top: 50%;
    width: 8px;
    height: 8px;
    border-right: 2px solid var(--text-muted);
    border-bottom: 2px solid var(--text-muted);
    transform: translateY(-70%) rotate(45deg);
    pointer-events: none;
}
 
select,
input[type="password"] {
    width: 100%;
    appearance: none;
    background: var(--ink-700);
    border: 1px solid var(--line);
    border-radius: 10px;
    padding: 13px 16px;
    font-size: 15px;
    font-family: var(--font-body);
    color: var(--text-main);
    transition: border-color 0.15s ease, background 0.15s ease;
}
 
select:focus,
input[type="password"]:focus {
    outline: none;
    border-color: var(--foil-teal);
    background: #262A34;
}
 
select option {
    background: var(--ink-800);
    color: var(--text-main);
}
 
.vault-submit {
    margin-top: 8px;
    border: none;
    border-radius: 10px;
    padding: 14px 20px;
    font-family: var(--font-display);
    font-weight: 700;
    font-size: 15px;
    color: var(--ink-900);
    background: linear-gradient(100deg, var(--foil-teal), var(--foil-violet) 60%, var(--foil-amber));
    cursor: pointer;
    transition: transform 0.12s ease, filter 0.15s ease;
}
 
.vault-submit:hover {
    filter: brightness(1.08);
    transform: translateY(-1px);
}
 
.vault-submit:active {
    transform: translateY(0);
    filter: brightness(0.96);
}
 
.vault-submit:focus-visible {
    outline: 2px solid var(--foil-teal);
    outline-offset: 3px;
}
 
.vault-footnote {
    margin: 4px 0 0;
    font-size: 12px;
    color: var(--text-muted);
    text-align: center;
}
 
.vault-scene-caption {
    font-family: var(--font-mono);
    font-size: 11px;
    letter-spacing: 0.1em;
    color: var(--text-muted);
    text-transform: uppercase;
    margin: 0;
}
 
/* Respect reduced-motion preference */
@media (prefers-reduced-motion: reduce) {
    .vault-foil-edge {
        animation: none;
    }
}
 
@media (max-width: 480px) {
    .vault-card {
        padding: 32px 22px 26px;
    }
 
    .vault-title {
        font-size: 24px;
    }
}