:root {
    color-scheme: dark;
    --bg: #080808;
    --surface: #141414;
    --border: #29252f;
    --purple: #9B5CFF;
    --cyan: #00F5FF;
    --text: #F5F3F8;
    --muted: #92909A;
}
* { box-sizing: border-box; }
html, body { min-height: 100%; margin: 0; }
body {
    min-height: 100vh;
    background:
        radial-gradient(ellipse at 16% 12%, rgba(155,92,255,.13), transparent 36%),
        radial-gradient(ellipse at 88% 85%, rgba(0,245,255,.07), transparent 32%),
        var(--bg);
    color: var(--text);
    font-family: Inter, "Segoe UI", Arial, sans-serif;
}
.login-page { min-height: 100vh; display: grid; place-items: center; padding: 28px 16px; }
.login-container { width: 100%; max-width: 430px; }
.login-box {
    padding: 42px;
    background: rgba(20,20,20,.94);
    border: 1px solid var(--border);
    border-radius: 18px;
    box-shadow: 0 28px 90px rgba(0,0,0,.5), 0 0 55px rgba(155,92,255,.06);
}
.login-header { text-align: center; margin-bottom: 34px; }
.brand-mark {
    width: 48px; height: 48px; margin: 0 auto 18px; display: grid; place-items: center;
    border: 1px solid rgba(155,92,255,.5); border-radius: 14px;
    background: rgba(155,92,255,.13); color: #C9A5FF; font-size: 15px; font-weight: 800; letter-spacing: .5px;
}
.login-header h1 { margin: 0; font-size: 23px; letter-spacing: 1.4px; font-weight: 750; }
.login-header span { display: block; margin-top: 9px; color: var(--muted); font-size: 13px; }
.login-form { display: flex; flex-direction: column; gap: 19px; }
.form-group { display: flex; flex-direction: column; gap: 8px; }
.form-group label { color: #C5C1CC; font-size: 13px; font-weight: 600; }
.form-group input {
    width: 100%; height: 48px; padding: 0 14px; border: 1px solid #302C37; border-radius: 9px;
    outline: none; background: #0D0C0F; color: var(--text); font: inherit; font-size: 14px;
    transition: border-color .18s, box-shadow .18s;
}
.form-group input::placeholder { color: #625E69; }
.form-group input:focus { border-color: var(--purple); box-shadow: 0 0 0 3px rgba(155,92,255,.13); }
.login-help { text-align: right; margin-top: -7px; }
.login-help a, .bootstrap-link { color: #A98BD4; font-size: 12px; text-decoration: none; }
.login-help a:hover, .bootstrap-link:hover { color: var(--cyan); }
.login-button {
    width: 100%; min-height: 48px; margin-top: 2px; border: 0; border-radius: 9px;
    background: linear-gradient(105deg, #8750DC, #9B5CFF); color: white;
    font-size: 14px; font-weight: 700; cursor: pointer; transition: filter .2s, transform .2s;
}
.login-button:hover { filter: brightness(1.12); }
.login-button:active { transform: translateY(1px); }
.login-button:disabled { opacity: .6; cursor: wait; }
.login-message { display: none; margin: 0; color: var(--cyan); font-size: 13px; line-height: 1.5; text-align: center; }
.login-message.active { display: block; }
.bootstrap-link { display: block; margin-top: 22px; padding-top: 18px; border-top: 1px solid #2A2630; text-align: center; }
.bootstrap-link[hidden] { display: none; }
.login-footer { margin-top: 30px; color: #66616D; text-align: center; font-size: 10px; letter-spacing: 1.2px; }
.login-footer span { color: #9B5CFF; }
@media (max-width: 480px) { .login-box { padding: 32px 24px; } .login-header h1 { font-size: 21px; } }