:root {
    color-scheme: dark;
    --login-bg: #0d0d19;
    --login-panel: rgba(24, 23, 43, 0.86);
    --login-border: rgba(255, 255, 255, 0.1);
    --login-text: #f7f6ff;
    --login-muted: #aaa8bd;
    --login-primary: #7c6cf2;
    --login-primary-strong: #6757dc;
}

* { box-sizing: border-box; margin: 0; padding: 0; }

body {
    min-height: 100vh;
    overflow-x: hidden;
    background:
        radial-gradient(circle at 12% 20%, rgba(124, 108, 242, 0.2), transparent 30rem),
        radial-gradient(circle at 90% 80%, rgba(52, 183, 166, 0.11), transparent 28rem),
        var(--login-bg);
    color: var(--login-text);
    font-family: Inter, ui-sans-serif, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

.login-ambient { position: fixed; inset: 0; overflow: hidden; pointer-events: none; }
.login-ambient span {
    position: absolute;
    width: 18rem;
    height: 18rem;
    border: 1px solid rgba(255, 255, 255, 0.06);
    border-radius: 35%;
    animation: drift 18s ease-in-out infinite alternate;
}
.login-ambient span:nth-child(1) { top: -7rem; right: 12%; transform: rotate(25deg); }
.login-ambient span:nth-child(2) { bottom: -10rem; left: 6%; width: 25rem; height: 25rem; animation-delay: -7s; }
.login-ambient span:nth-child(3) { top: 42%; right: -8rem; width: 14rem; height: 14rem; animation-delay: -12s; }

.login-shell {
    position: relative;
    z-index: 1;
    display: grid;
    min-height: 100vh;
    grid-template-columns: minmax(0, 1fr) minmax(360px, 480px);
    align-items: center;
    gap: clamp(3rem, 8vw, 9rem);
    width: min(1120px, calc(100% - 48px));
    margin: 0 auto;
    padding: 48px 0;
}

.login-brand {
    display: inline-flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 72px;
    font-size: 17px;
    font-weight: 750;
}
.login-brand span {
    display: inline-flex;
    width: 40px;
    height: 40px;
    align-items: center;
    justify-content: center;
    border-radius: 12px;
    background: linear-gradient(135deg, #8d7fff, #5a4cca);
    box-shadow: 0 10px 30px rgba(124, 108, 242, 0.3);
    font-size: 13px;
}
.login-eyebrow {
    margin-bottom: 16px;
    color: #9588ff;
    font-size: 13px;
    font-weight: 800;
    letter-spacing: 0.14em;
    text-transform: uppercase;
}
.login-intro h1 {
    max-width: 650px;
    font-size: clamp(2.8rem, 5.6vw, 5rem);
    line-height: 0.98;
    letter-spacing: -0.055em;
}
.login-copy {
    max-width: 540px;
    margin-top: 26px;
    color: var(--login-muted);
    font-size: 18px;
    line-height: 1.65;
}
.login-status {
    display: inline-flex;
    align-items: center;
    gap: 9px;
    margin-top: 42px;
    padding: 9px 13px;
    border: 1px solid rgba(55, 207, 154, 0.2);
    border-radius: 999px;
    background: rgba(55, 207, 154, 0.07);
    color: #a9ead3;
    font-size: 13px;
    font-weight: 650;
}
.login-status i {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: #37cf9a;
    box-shadow: 0 0 0 5px rgba(55, 207, 154, 0.1);
}

.login-box {
    padding: clamp(28px, 4vw, 46px);
    border: 1px solid var(--login-border);
    border-radius: 26px;
    background: var(--login-panel);
    box-shadow: 0 32px 90px rgba(0, 0, 0, 0.42);
    backdrop-filter: blur(20px);
}
.login-mark {
    display: flex;
    width: 54px;
    height: 54px;
    align-items: center;
    justify-content: center;
    margin-bottom: 28px;
    border: 1px solid rgba(255, 255, 255, 0.08);
    border-radius: 16px;
    background: #292641;
    font-size: 25px;
}
.login-box h2 { font-size: 30px; line-height: 1.15; letter-spacing: -0.03em; }
.subtitle { margin: 10px 0 30px; color: var(--login-muted); line-height: 1.55; }
.login-box label {
    display: block;
    margin-bottom: 8px;
    color: #d7d4e5;
    font-size: 13px;
    font-weight: 700;
}
.login-box input {
    width: 100%;
    min-height: 52px;
    margin-bottom: 18px;
    padding: 13px 15px;
    border: 1px solid #3b3851;
    border-radius: 12px;
    outline: none;
    background: #171625;
    color: #fff;
    font-size: 16px;
}
.login-box input:focus { border-color: #897aff; box-shadow: 0 0 0 4px rgba(124, 108, 242, 0.18); }
.login-box input::placeholder { color: #6f6b82; }
.login-box button {
    display: inline-flex;
    width: 100%;
    min-height: 52px;
    align-items: center;
    justify-content: space-between;
    padding: 13px 17px;
    border: 0;
    border-radius: 12px;
    background: linear-gradient(135deg, var(--login-primary), var(--login-primary-strong));
    box-shadow: 0 14px 30px rgba(103, 87, 220, 0.26);
    color: #fff;
    font-size: 15px;
    font-weight: 750;
    cursor: pointer;
}
.login-box button:hover { filter: brightness(1.08); }
.help, .error, .success {
    margin-bottom: 18px;
    padding: 12px 14px;
    border: 1px solid;
    border-radius: 11px;
    font-size: 14px;
    line-height: 1.5;
}
.help { border-color: #3c385c; background: #211f37; color: #c7c1ef; }
.error { border-color: rgba(248, 113, 113, 0.25); background: rgba(127, 29, 29, 0.22); color: #fecaca; }
.success { border-color: rgba(74, 222, 128, 0.24); background: rgba(20, 83, 45, 0.24); color: #bbf7d0; }
.login-footnote { margin-top: 24px; color: #777386; font-size: 12px; text-align: center; }

@keyframes drift { to { transform: translate3d(30px, -24px, 0) rotate(55deg); } }

@media (max-width: 820px) {
    .login-shell {
        grid-template-columns: 1fr;
        gap: 32px;
        width: min(100% - 28px, 480px);
        padding: 30px 0;
    }
    .login-intro { text-align: center; }
    .login-brand { margin-bottom: 30px; }
    .login-intro h1 { font-size: clamp(2.35rem, 12vw, 3.4rem); }
    .login-copy { margin: 18px auto 0; font-size: 15px; }
    .login-status { margin-top: 24px; }
}

@media (max-width: 440px) {
    .login-shell { width: min(100% - 20px, 420px); }
    .login-box { padding: 26px 20px; border-radius: 20px; }
}

@media (prefers-reduced-motion: reduce) {
    .login-ambient span { animation: none; }
}