:root {
    --bg: #0f1117;
    --card: #000000;
    --accent: #e11d2e;
    --accent-hover: #c11424;
    --text: #e8e8ee;
    --muted: #9a9db0;
    --error: #ff6b6b;
    --success: #51cf66;
    --border: #2a2e3a;
}
* { box-sizing: border-box; }
body {
    background:
        radial-gradient(circle at 50% 0%, rgba(225,29,46,0.14), transparent 55%),
        radial-gradient(rgba(255,255,255,0.035) 1px, transparent 1px) 0 0/24px 24px,
        var(--bg);
    color: var(--text);
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
    min-height: 100vh;
    margin: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 24px;
}
.card {
    background: var(--card);
    border: 1px solid rgba(225,29,46,0.25);
    border-radius: 20px;
    padding: 36px;
    width: 100%;
    max-width: 400px;
    box-shadow:
        0 0 0 1px rgba(255,255,255,0.02),
        0 20px 60px -20px rgba(225,29,46,0.35),
        0 10px 40px rgba(0,0,0,0.6);
}
.logo {
    display: block;
    max-width: 160px;
    margin: 0 auto 20px;
    filter: drop-shadow(0 0 18px rgba(225,29,46,0.35));
}
.eyebrow {
    text-align: center;
    font-family: "Courier New", monospace;
    font-size: 11px;
    letter-spacing: .14em;
    text-transform: uppercase;
    color: var(--accent);
    margin-bottom: 6px;
}
h1 { font-size: 22px; margin: 0 0 4px; text-align: center; }
.subtitle { color: var(--muted); font-size: 14px; margin-bottom: 24px; text-align: center; }
label {
    display: block;
    font-size: 13px;
    color: var(--muted);
    margin-bottom: 6px;
    margin-top: 16px;
}
input[type="text"], input[type="password"] {
    width: 100%;
    padding: 11px 12px;
    background: #10121a;
    border: 1px solid var(--border);
    border-radius: 8px;
    color: var(--text);
    font-size: 15px;
}
input:focus { outline: none; border-color: var(--accent); box-shadow: 0 0 0 3px rgba(225,29,46,0.15); }
button {
    width: 100%;
    margin-top: 22px;
    padding: 12px;
    background: var(--accent);
    border: none;
    border-radius: 8px;
    color: white;
    font-size: 15px;
    font-weight: 600;
    cursor: pointer;
    transition: background .15s, box-shadow .15s;
}
button:hover { background: var(--accent-hover); box-shadow: 0 6px 20px -6px rgba(225,29,46,0.55); }
.flash {
    padding: 10px 14px;
    border-radius: 8px;
    font-size: 14px;
    margin-bottom: 8px;
}
.flash.error { background: rgba(255,107,107,0.12); color: var(--error); }
.flash.success { background: rgba(81,207,102,0.12); color: var(--success); }
.footer-link { text-align: center; margin-top: 20px; font-size: 14px; color: var(--muted); }
.footer-link a { color: var(--accent); text-decoration: none; }

/* QR Code: fundo branco fixo no CONTAINER (não no canvas/img filho),
   garantindo contraste alto independente de como a biblioteca renderiza */
.qr-box {
    text-align: center;
    margin: 20px 0;
    background: #ffffff;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 16px;
    border-radius: 8px;
    width: 100%;
}
.qr-box img, .qr-box canvas {
    display: block;
    image-rendering: pixelated;
}

.secret-box {
    background: #10121a;
    border: 1px dashed var(--border);
    border-radius: 8px;
    padding: 10px;
    font-family: monospace;
    font-size: 14px;
    text-align: center;
    letter-spacing: 1px;
    word-break: break-all;
    margin-top: 8px;
}