:root {
    color-scheme: light;
    font-family: "Inter", "HarmonyOS Sans SC", "MiSans", "Segoe UI", "Microsoft YaHei", Arial, sans-serif;
    --login-primary: #2563eb;
    --login-primary-dark: #1e40af;
    --login-accent: #14b8a6;
    --login-text: #122033;
    --login-muted: #64748b;
    --login-border: #d8e1ee;
}

* {
    box-sizing: border-box;
}

body.login-page {
    margin: 0;
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 24px;
    color: var(--login-text);
    background:
        radial-gradient(circle at 12% 18%, rgba(37, 99, 235, 0.18), transparent 28rem),
        radial-gradient(circle at 88% 82%, rgba(20, 184, 166, 0.14), transparent 24rem),
        linear-gradient(160deg, #eef4ff 0%, #f8fbff 45%, #edf8ff 100%);
}

.login-shell {
    display: grid;
    grid-template-columns: minmax(0, 1fr) minmax(360px, 400px);
    width: min(1080px, 100%);
    min-height: min(640px, calc(100vh - 48px));
    overflow: hidden;
    border-radius: 20px;
    box-shadow:
        0 24px 64px rgba(15, 23, 42, 0.14),
        0 0 0 1px rgba(216, 225, 238, 0.8);
}

.login-hero {
    display: flex;
    align-items: center;
    justify-content: center;
    padding: clamp(28px, 4vw, 48px);
    color: #fff;
    background:
        radial-gradient(circle at 20% 20%, rgba(96, 165, 250, 0.22), transparent 18rem),
        linear-gradient(165deg, #0f2a5f 0%, #111827 58%, #0f172a 100%);
}

.login-hero-inner {
    width: 100%;
    max-width: 420px;
}

.brand-line {
    display: flex;
    align-items: center;
    gap: 14px;
    margin-bottom: 24px;
}

.brand-mark {
    display: grid;
    place-items: center;
    width: 48px;
    height: 48px;
    color: #fff;
    background: linear-gradient(135deg, #60a5fa, var(--login-accent));
    border-radius: 12px;
    box-shadow: 0 16px 32px rgba(20, 184, 166, 0.24);
    font-size: 22px;
    font-weight: 800;
}

.brand-line strong {
    display: block;
    font-size: 18px;
    letter-spacing: -0.02em;
}

.brand-line span {
    display: block;
    margin-top: 4px;
    color: rgba(255, 255, 255, 0.68);
    font-size: 13px;
}

.login-hero-title {
    margin: 0 0 12px;
    font-size: clamp(24px, 3.2vw, 32px);
    line-height: 1.3;
    letter-spacing: -0.03em;
}

.login-hero-desc {
    margin: 0 0 24px;
    color: rgba(255, 255, 255, 0.78);
    font-size: 14px;
    line-height: 1.7;
}

.login-feature-list {
    margin: 0;
    padding: 0;
    list-style: none;
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 10px;
}

.login-feature-list li {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 10px 12px;
    color: rgba(255, 255, 255, 0.92);
    background: rgba(255, 255, 255, 0.08);
    border: 1px solid rgba(255, 255, 255, 0.12);
    border-radius: 10px;
    backdrop-filter: blur(8px);
    font-size: 13px;
    line-height: 1.4;
}

.login-feature-icon {
    display: grid;
    place-items: center;
    width: 28px;
    height: 28px;
    flex-shrink: 0;
    border-radius: 8px;
    background: rgba(255, 255, 255, 0.14);
    font-size: 13px;
    font-weight: 800;
}

.login-card {
    display: flex;
    flex-direction: column;
    justify-content: center;
    padding: clamp(32px, 4vw, 48px);
    background: #fff;
}

.login-card-header h1 {
    margin: 0 0 8px;
    font-size: 26px;
    letter-spacing: -0.03em;
}

.login-card-header p {
    margin: 0 0 22px;
    color: var(--login-muted);
    line-height: 1.6;
    font-size: 14px;
}

.login-form label {
    display: grid;
    gap: 8px;
    margin-bottom: 16px;
    color: var(--login-muted);
    font-size: 14px;
    font-weight: 650;
}

.login-form input {
    width: 100%;
    padding: 12px 14px;
    color: var(--login-text);
    background: #f8fbff;
    border: 1px solid var(--login-border);
    border-radius: 10px;
    font: inherit;
    transition: border-color 0.15s ease, box-shadow 0.15s ease, background 0.15s ease;
}

.login-form input:focus {
    outline: none;
    background: #fff;
    border-color: rgba(37, 99, 235, 0.65);
    box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.12);
}

.login-form button {
    width: 100%;
    margin-top: 4px;
    border: 0;
    border-radius: 10px;
    padding: 13px 16px;
    color: #fff;
    background: linear-gradient(135deg, var(--login-primary), #3b82f6);
    font: inherit;
    font-weight: 700;
    cursor: pointer;
    box-shadow: 0 14px 28px rgba(37, 99, 235, 0.22);
    transition: transform 0.15s ease, box-shadow 0.15s ease, background 0.15s ease;
}

.login-form button:hover {
    background: linear-gradient(135deg, var(--login-primary-dark), var(--login-primary));
    box-shadow: 0 18px 34px rgba(37, 99, 235, 0.26);
    transform: translateY(-1px);
}

.login-form button:disabled {
    opacity: 0.65;
    cursor: not-allowed;
    transform: none;
    box-shadow: none;
}

.login-divider {
    display: flex;
    align-items: center;
    gap: 12px;
    margin: 18px 0 14px;
    color: var(--login-muted);
    font-size: 12px;
}

.login-divider::before,
.login-divider::after {
    content: "";
    flex: 1;
    height: 1px;
    background: var(--login-border);
}

.ukey-login-form {
    margin-top: 0;
}

.login-ukey-hint {
    margin: 10px 0 0;
    color: var(--login-muted);
    font-size: 12px;
    line-height: 1.5;
}

.login-footnote {
    margin: 18px 0 0;
    color: var(--login-muted);
    font-size: 12px;
    line-height: 1.6;
    text-align: center;
}

.message {
    margin-bottom: 16px;
    padding: 10px 12px;
    border: 1px solid var(--login-border);
    border-radius: 10px;
    background: #f4f7fb;
    font-size: 13px;
    line-height: 1.5;
}

.message.hint {
    color: var(--login-muted);
    background: #f8fafc;
}

.message.error {
    color: #b91c1c;
    background: #fef2f2;
    border-color: #fecaca;
}

.message.success {
    color: #15803d;
    background: #f0fdf4;
    border-color: #bbf7d0;
}

@media (max-width: 900px) {
    body.login-page {
        align-items: flex-start;
        padding: 16px;
    }

    .login-shell {
        grid-template-columns: 1fr;
        width: min(480px, 100%);
        min-height: auto;
    }

    .login-hero {
        padding: 28px 24px 24px;
    }

    .login-hero-inner {
        max-width: none;
    }

    .login-hero-title {
        font-size: 24px;
    }

    .login-card {
        padding: 28px 24px 32px;
    }
}

@media (max-width: 560px) {
    .login-feature-list {
        grid-template-columns: 1fr;
    }
}