:root {
    color-scheme: dark;
    --login-bg: #08110f;
    --login-surface: #10211b;
    --login-surface-strong: #0b1814;
    --login-field: #0d1d17;
    --login-text: #f4efe5;
    --login-muted: #aab7af;
    --login-line: rgba(244, 239, 229, 0.14);
    --login-line-strong: rgba(244, 239, 229, 0.24);
    --login-mint: #8df7a6;
    --login-mint-deep: #62df82;
    --login-coral: #ff8f7a;
    --login-radius: 8px;
    font-family: "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
    font-synthesis: none;
    text-rendering: optimizeLegibility;
    -webkit-font-smoothing: antialiased;
}

* { box-sizing: border-box; }
html, body { width: 100%; min-width: 320px; min-height: 100%; }
body.login-page { margin: 0; overflow: hidden; color: var(--login-text); background: var(--login-bg); letter-spacing: 0; }
body.login-page, button, input { font: inherit; }
button, input { letter-spacing: 0; }
a { color: inherit; text-decoration: none; }

.login-stage {
    position: relative;
    display: grid;
    min-height: 100svh;
    place-items: center;
    padding: clamp(24px, 4vw, 48px);
    overflow: hidden;
}

.login-stage::before {
    position: absolute;
    top: 0;
    bottom: 0;
    left: clamp(24px, 6vw, 92px);
    width: 1px;
    content: '';
    background: rgba(244, 239, 229, 0.06);
}

.login-console {
    position: relative;
    display: grid;
    width: min(1120px, 100%);
    min-height: min(640px, calc(100svh - 64px));
    grid-template-columns: minmax(0, 1.08fr) minmax(390px, .92fr);
    overflow: hidden;
    border: 1px solid var(--login-line-strong);
    border-radius: var(--login-radius);
    background: var(--login-surface);
}

.login-identity {
    position: relative;
    display: flex;
    min-width: 0;
    flex-direction: column;
    justify-content: space-between;
    padding: clamp(38px, 5vw, 62px);
    overflow: hidden;
    border-right: 1px solid var(--login-line);
}

.login-brand { position: relative; z-index: 2; display: flex; align-items: center; gap: 18px; }
.login-mark {
    display: block;
    width: 50px;
    height: 50px;
    flex: 0 0 auto;
    border-radius: 11px;
}
.login-brand h1 { margin: 0; font-size: clamp(46px, 5vw, 68px); font-weight: 650; line-height: .95; letter-spacing: -.035em; }

.login-signal {
    position: relative;
    height: clamp(180px, 27vh, 228px);
    margin-top: 56px;
    border-top: 1px solid var(--login-line);
    border-bottom: 1px solid var(--login-line);
}
.login-signal::before { position: absolute; top: 0; bottom: 0; left: 50%; width: 1px; content: ''; background: var(--login-line); }
.login-signal::after { position: absolute; top: 16px; right: 0; width: 12px; height: 12px; content: ''; border-top: 2px solid var(--login-mint); border-right: 2px solid var(--login-mint); }
.signal-line { position: absolute; top: 50%; right: 0; left: 0; height: 1px; background: var(--login-line-strong); }
.signal-node, .signal-runner { position: absolute; top: calc(50% - 5px); width: 10px; height: 10px; }
.signal-node { border: 1px solid var(--login-mint); background: var(--login-surface); transform: rotate(45deg); }
.signal-node-a { left: 0; }
.signal-node-b { left: calc(50% - 5px); }
.signal-node-c { right: 0; }
.signal-runner { left: 0; border-radius: 50%; background: var(--login-mint); box-shadow: 0 8px 22px rgba(98, 223, 130, .22); animation: login-signal-run 5.8s cubic-bezier(.22, 1, .36, 1) infinite; }

.login-panel {
    display: flex;
    min-width: 0;
    flex-direction: column;
    justify-content: center;
    padding: clamp(38px, 5vw, 62px);
    background: var(--login-surface-strong);
}
.login-heading { display: flex; align-items: end; justify-content: space-between; gap: 20px; margin-bottom: 34px; padding-bottom: 18px; border-bottom: 1px solid var(--login-line); }
.login-heading h2 { margin: 0; font-size: clamp(30px, 3vw, 38px); font-weight: 650; line-height: 1; letter-spacing: -.025em; }

.login-form { display: grid; gap: 18px; }
.login-field { display: grid; gap: 9px; }
.login-field > span { display: flex; align-items: baseline; justify-content: space-between; gap: 12px; color: var(--login-text); font-size: 13px; font-weight: 700; }
.login-field > span small { color: var(--login-muted); font-size: 11px; font-weight: 500; }
.login-field input {
    width: 100%;
    min-height: 54px;
    border: 1px solid var(--login-line-strong);
    border-radius: var(--login-radius);
    outline: none;
    padding: 0 16px;
    color: var(--login-text);
    background: var(--login-field);
    caret-color: var(--login-mint);
    transition: border-color 180ms ease, box-shadow 180ms ease, background-color 180ms ease;
}
.login-field input:hover { border-color: rgba(244, 239, 229, .34); }
.login-field input:focus { border-color: var(--login-mint); background: #10231b; box-shadow: 0 0 0 3px rgba(141, 247, 166, .11); }
.login-field input:-webkit-autofill { -webkit-text-fill-color: var(--login-text); box-shadow: 0 0 0 1000px var(--login-field) inset; }
.login-field-error { color: var(--login-coral); font-size: 12px; font-weight: 500; line-height: 1.45; }

.login-feedback { padding: 12px 14px; border-radius: var(--login-radius); font-size: 13px; line-height: 1.5; }
.login-feedback.is-success { color: var(--login-mint); background: rgba(141, 247, 166, .08); border: 1px solid rgba(141, 247, 166, .32); }
.login-feedback.is-error { color: #ffd7ce; background: rgba(255, 143, 122, .09); border: 1px solid rgba(255, 143, 122, .34); }

.login-submit {
    min-height: 54px;
    margin-top: 4px;
    border: 0;
    border-radius: var(--login-radius);
    color: #09150f;
    background: var(--login-mint);
    cursor: pointer;
    font-weight: 850;
    transition: transform 220ms cubic-bezier(.16, 1, .3, 1), background-color 180ms ease, box-shadow 180ms ease;
}
.login-submit:hover { background: #a0f9b3; transform: translateY(-2px); box-shadow: 0 12px 28px rgba(98, 223, 130, .18); }
.login-submit:active { transform: translateY(0); }
.login-submit:focus-visible { outline: 2px solid var(--login-mint); outline-offset: 4px; }
.login-submit:disabled { cursor: wait; opacity: .66; transform: none; }

.login-links { display: flex; align-items: center; justify-content: space-between; gap: 16px; margin-top: 30px; }
.login-links a { display: inline-flex; min-height: 44px; align-items: center; padding: 0 2px; color: var(--login-muted); font-size: 12px; font-weight: 650; transition: color 180ms ease; }
.login-links a:hover, .login-links a:focus-visible { color: var(--login-mint); }
.login-links a:focus-visible { outline: 2px solid var(--login-mint); outline-offset: 4px; }

@keyframes login-signal-run {
    0%, 100% { left: 0; opacity: .45; }
    50% { left: calc(100% - 10px); opacity: 1; }
}

@media (max-width: 820px) {
    body.login-page { overflow-y: auto; }
    .login-stage { min-height: 100svh; padding: 16px; overflow: visible; }
    .login-stage::before { display: none; }
    .login-console { min-height: 0; grid-template-columns: minmax(0, 1fr); }
    .login-identity { min-height: 230px; padding: 28px; border-right: 0; border-bottom: 1px solid var(--login-line); }
    .login-brand h1 { font-size: 42px; }
    .login-signal { height: 80px; margin-top: 28px; }
    .login-panel { padding: 28px; }
}

@media (max-height: 700px) and (min-width: 821px) {
    .login-console { min-height: calc(100svh - 40px); }
    .login-identity, .login-panel { padding: 32px 40px; }
    .login-signal { height: 150px; margin-top: 32px; }
}

@media (prefers-reduced-motion: reduce) {
    *, *::before, *::after { animation-duration: .01ms !important; animation-iteration-count: 1 !important; transition-duration: .01ms !important; }
}