:root {
    --bg: #0b1020;
    --card: #121936;
    --text: #e9eefc;
    --muted: #a9b3d1;
    --accent: #8ab4ff;
    --border: #243057;
}

* {
    box-sizing: border-box;
}

body {
    margin: 0;
    font-family: system-ui, -apple-system, Segoe UI, Roboto, Inter, Arial, sans-serif;
    background: radial-gradient(1000px 600px at 70% -10%, #1a2556, transparent), var(--bg);
    color: var(--text);
    min-height: 100svh;
    display: grid;
    place-items: center;
    padding: 32px 16px;
}

.container {
    width: 100%;
    max-width: 920px;
    display: grid;
    gap: 20px;
}

h1, h2 {
    margin: 0 0 8px;
    font-weight: 700;
    letter-spacing: 0.2px;
}

.card {
    background: linear-gradient(180deg, rgba(255,255,255,0.02), rgba(255,255,255,0.01));
    border: 1px solid var(--border);
    border-radius: 18px;
    padding: 18px;
    box-shadow: 0 10px 30px rgba(0,0,0,0.25);
}

form.card {
    display: grid;
    gap: 12px;
    grid-template-columns: 1fr 1fr;
}

label {
    display: grid;
    gap: 6px;
    font-size: 14px;
    color: var(--muted);
}

#password-wrap {
    grid-column: 1 / -1;
}

input[type="text"], select {
    width: 100%;
    padding: 10px 12px;
    border-radius: 12px;
    border: 1px solid var(--border);
    background: #0e1530;
    color: var(--text);
    outline: none;
}

.row {
    display: inline-flex;
    align-items: center;
    gap: 10px;
}

button {
    appearance: none;
    border: 1px solid var(--border);
    background: linear-gradient(180deg, #1b2a66, #162458);
    color: var(--text);
    padding: 10px 14px;
    border-radius: 12px;
    cursor: pointer;
    transition: transform 0.04s ease-in-out, box-shadow 0.15s ease;
    box-shadow: 0 8px 18px rgba(0,0,0,0.25);
}

button:hover {
    transform: translateY(-1px);
}

button:active {
    transform: translateY(0);
}

#generate {
    grid-column: 2;
    justify-self: end;
}

.output {
    display: grid;
    gap: 14px;
    place-items: center;
    text-align: center;
}

#qr-canvas {
    background: #fff;
    border-radius: 12px;
    padding: 8px;
}

.payload {
    width: 100%;
    max-width: 680px;
    background: #0e1530;
    border: 1px dashed var(--border);
    color: var(--muted);
    padding: 12px;
    border-radius: 12px;
    overflow-x: auto;
    margin: 0;
}

.note {
    color: var(--muted);
    margin: 0;
    font-size: 13px;
}

.tabs {
    display: flex;
    gap: 1rem;
    justify-content: center;
    margin: 1rem 0;
}

.tabs button {
    padding: 0.5rem 1rem;
    border: none;
    cursor: pointer;
    border-bottom: 2px solid transparent;
    background: none;
    font-size: 1rem;
    color: var(--text);
}

.tabs button.active {
    border-color: var(--accent);
    font-weight: bold;
}

.hidden {
    display: none;
}

video,
#video-canvas {
    width: 280px;
    height: 280px;
    object-fit: cover;
    border: 1px solid var(--border);
    border-radius: 12px;
}

#copy-pass {
    margin-left: 8px;
    font-size: 12px;
    padding: 4px 8px;
    border-radius: 8px;
}

footer {
    color: var(--text);
    padding: 15px;
    text-align: center;
    margin-top: 20px;
    border: 1px solid var(--border);
    border-radius: 18px;
    box-shadow: 0 10px 30px rgba(0,0,0,0.25);
}

footer p {
    margin: 5px 0;
}

@media (max-width: 720px) {
    form.card {
        grid-template-columns: 1fr;
    }

    #generate {
        grid-column: 1;
        justify-self: stretch;
    }
}