:root {
    --ink: #f7efe7;
    --muted: rgba(255, 242, 231, 0.78);
    --surface: rgba(28, 14, 46, 0.48);
    --accent: #ffbe78;
    --accent-strong: #ffdbb0;
    --danger: #b03a2e;
}

* {
    box-sizing: border-box;
}

html,
body {
    margin: 0;
    min-height: 100%;
}

body {
    font-family: "Segoe UI", "Microsoft YaHei", sans-serif;
    color: var(--ink);
    background:
        radial-gradient(circle at 18% 18%, rgba(88, 232, 255, 0.2), transparent 24%),
        radial-gradient(circle at 82% 16%, rgba(255, 216, 103, 0.16), transparent 26%),
        radial-gradient(circle at 76% 72%, rgba(255, 108, 173, 0.2), transparent 28%),
        radial-gradient(circle at 24% 82%, rgba(111, 84, 255, 0.18), transparent 30%),
        linear-gradient(135deg, #091126 0%, #241040 30%, #521857 55%, #8b304b 78%, #b8864d 100%);
}

.login-shell {
    min-height: 100vh;
    display: grid;
    place-items: center;
    padding: 24px;
}

.login-panel {
    width: min(960px, 100%);
    display: grid;
    grid-template-columns: minmax(0, 1.1fr) minmax(320px, 420px);
    gap: 28px;
    padding: 30px;
    border-radius: 28px;
    background: var(--surface);
    border: 1px solid rgba(255, 226, 186, 0.16);
    backdrop-filter: blur(18px);
    box-shadow: 0 30px 60px rgba(8, 10, 20, 0.3);
}

.login-copy {
    align-self: start;
    margin-top: 24px;
    color: #fff7ee;
}

.login-eyebrow {
    margin: 0 0 10px;
    font-size: 0.82rem;
    letter-spacing: 0.18em;
    text-transform: uppercase;
    color: #ffd29f;
}

.login-copy h1 {
    margin: 0;
    font-size: clamp(2rem, 4vw, 3.4rem);
    line-height: 1.02;
}

.login-text {
    margin: 14px 0 0;
    max-width: 420px;
    line-height: 1.7;
    color: rgba(255, 243, 232, 0.82);
}

.login-form {
    padding: 24px;
    border-radius: 24px;
    background: rgba(255, 255, 255, 0.08);
    border: 1px solid rgba(255, 226, 186, 0.12);
    backdrop-filter: blur(14px);
    display: grid;
    gap: 16px;
}

.field {
    display: grid;
    gap: 8px;
    font-size: 0.95rem;
}

.field span {
    color: var(--muted);
}

.field input {
    width: 100%;
    padding: 12px 14px;
    border: 1px solid rgba(97, 69, 49, 0.14);
    border-radius: 14px;
    font: inherit;
    background: #fffdfb;
}

.field input:focus {
    outline: 2px solid rgba(143, 79, 45, 0.28);
    border-color: rgba(143, 79, 45, 0.42);
}

.submit-btn {
    padding: 13px 16px;
    border: none;
    border-radius: 14px;
    font: inherit;
    color: #fff;
    background: linear-gradient(135deg, var(--accent), var(--accent-strong));
    cursor: pointer;
}

.submit-btn:disabled {
    opacity: 0.7;
    cursor: wait;
}

.form-error {
    min-height: 1.2em;
    margin: 0;
    color: var(--danger);
    font-size: 0.9rem;
}

@media (max-width: 760px) {
    .login-panel {
        grid-template-columns: 1fr;
        padding: 20px;
    }
}