/* =============================================================
   Midnight · 登录 / 注册
   ============================================================= */
body.md-auth-body { background: var(--md-bg); }

.md-auth {
    display: grid;
    grid-template-columns: minmax(0, 1.05fr) minmax(440px, .95fr);
    min-height: 100vh;
}

/* 左：品牌视觉 */
.md-auth-visual {
    position: relative;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    padding: 56px 64px;
    overflow: hidden;
    background:
        radial-gradient(900px 600px at 20% 10%, rgba(226, 178, 109, .13), transparent 60%),
        radial-gradient(700px 500px at 90% 90%, rgba(127, 147, 201, .1), transparent 62%),
        linear-gradient(160deg, #0b0d12, #08090c 70%);
    border-right: 1px solid var(--md-line);
}
.md-auth-visual::before {
    content: "";
    position: absolute;
    inset: 0;
    background-image: radial-gradient(rgba(255, 255, 255, .2) .5px, transparent .5px);
    background-size: 4px 4px;
    opacity: .18;
    mask-image: radial-gradient(600px 500px at 30% 40%, #000, transparent 70%);
    pointer-events: none;
}
.md-auth-visual > * { position: relative; z-index: 1; }
.md-auth-copy h1 { margin: 46px 0 18px; font: 700 clamp(34px, 3.4vw, 52px)/1.3 var(--md-serif); letter-spacing: .02em; }
.md-auth-copy h1 em { display: block; color: var(--md-gold); font-style: normal; }
.md-auth-copy p { max-width: 420px; color: var(--md-muted); font-size: 14px; line-height: 1.95; }
.md-auth-points { display: flex; flex-direction: column; gap: 14px; margin-top: 38px; }
.md-auth-points li { display: flex; align-items: center; gap: 12px; color: var(--md-text-2); font-size: 13.5px; }
.md-auth-points i {
    display: grid;
    place-items: center;
    width: 30px;
    height: 30px;
    border: 1px solid var(--md-line-gold);
    border-radius: 9px;
    color: var(--md-gold);
    font-style: normal;
    font-size: 13px;
}
.md-auth-mark { display: flex; align-items: center; gap: 10px; color: var(--md-dim); font-size: 10px; letter-spacing: .24em; }
.md-auth-mark::before { content: ""; width: 34px; height: 1px; background: var(--md-line-2); }

/* 右：表单 */
.md-auth-panel {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 48px 40px;
    background: var(--md-bg-2);
}
.md-auth-box { width: min(420px, 100%); }
.md-auth-back { display: inline-flex; align-items: center; gap: 6px; margin-bottom: 26px; color: var(--md-dim); font-size: 12.5px; }
.md-auth-back:hover { color: var(--md-gold); }
.md-auth-head h2 { font: 600 30px/1.3 var(--md-serif); }
.md-auth-head p { margin-top: 8px; color: var(--md-muted); font-size: 13px; }

/* 旧容器重置 */
.login-container { margin-top: 26px; }
.login-container .form-title { display: none; }

.tab-nav {
    display: flex;
    align-items: center;
    gap: 4px;
    padding: 4px;
    margin-bottom: 22px;
    background: var(--md-bg-3);
    border: 1px solid var(--md-line);
    border-radius: 11px;
}
.tab-nav .tab-item {
    flex: 1;
    padding: 9px 10px;
    border-radius: 8px;
    color: var(--md-muted);
    font-size: 13px;
    text-align: center;
    cursor: pointer;
    transition: all .18s ease;
}
.tab-nav .tab-item:hover { color: var(--md-gold); }
.tab-nav .tab-item.active {
    color: #1a1206;
    background: linear-gradient(135deg, var(--md-gold-2), var(--md-gold));
    font-weight: 700;
}

.login-form { display: block; }
.login-form .form-group { margin-bottom: 14px; }
.form-input {
    width: 100%;
    height: 46px;
    padding: 0 15px;
    border: 1px solid var(--md-line);
    border-radius: 10px;
    background: var(--md-bg-3);
    color: var(--md-text);
    font-size: 14px;
    transition: border-color .2s ease, box-shadow .2s ease;
}
.form-input:focus { border-color: var(--md-line-gold); box-shadow: 0 0 0 3px rgba(226, 178, 109, .08); outline: none; }
.form-input::placeholder { color: var(--md-dim); }
.code-group { display: flex; gap: 10px; }
.code-group .code-input { flex: 1; }
.send-btn {
    flex: 0 0 auto;
    height: 46px;
    padding: 0 16px;
    border: 1px solid var(--md-line-2);
    border-radius: 10px;
    background: var(--md-panel);
    color: var(--md-gold);
    font-size: 12.5px;
    white-space: nowrap;
}
.send-btn:hover { border-color: var(--md-line-gold); background: var(--md-gold-soft); }
.send-btn:disabled { opacity: .5; cursor: not-allowed; }
.form-hint { margin: 2px 0 16px; color: var(--md-dim); font-size: 11.5px; line-height: 1.7; }
.submit-btn {
    width: 100%;
    height: 46px;
    margin-top: 6px;
    border-radius: 999px;
    background: linear-gradient(135deg, var(--md-gold-2), var(--md-gold) 55%, #c8964f);
    color: #1a1206;
    font-size: 14px;
    font-weight: 700;
    letter-spacing: .04em;
    box-shadow: 0 10px 24px rgba(226, 178, 109, .16);
    transition: all .2s ease;
}
.submit-btn:hover { filter: brightness(1.05); transform: translateY(-1px); }
.error-tip { display: none; margin-top: 5px; color: var(--md-terra); font-size: 11.5px; }

.protocol-group { display: flex; flex-wrap: wrap; align-items: center; gap: 4px 8px; margin: 16px 0 4px; color: var(--md-muted); font-size: 12px; }
.protocol-group label { display: inline-flex; align-items: center; gap: 6px; cursor: pointer; }
.protocol-group input[type="checkbox"] { width: 14px; height: 14px; accent-color: var(--md-gold); }
.protocol-links { display: inline-flex; align-items: center; gap: 5px; }
.protocol-links a { color: var(--md-gold); }
.protocol-links a:hover { text-decoration: underline; }

.third-login { margin-top: 20px; }
.third-login .divider { display: flex; align-items: center; gap: 12px; margin-bottom: 14px; color: var(--md-dim); font-size: 11px; }
.third-login .divider-line { flex: 1; height: 1px; background: var(--md-line); }
.third-login .third-buttons { display: flex; flex-wrap: wrap; gap: 10px; }
.third-login .other-login { display: flex; flex-wrap: wrap; gap: 10px; }
.third-login .link {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    height: 38px;
    padding: 0 16px;
    border: 1px solid var(--md-line);
    border-radius: 999px;
    color: var(--md-text-2);
    font-size: 12.5px;
}
.third-login .link:hover { border-color: var(--md-line-gold); color: var(--md-gold); }

.auth-closed { padding: 30px; border: 1px dashed var(--md-line-2); border-radius: var(--md-r-sm); color: var(--md-muted); font-size: 13px; text-align: center; }

.footer-links { display: flex; align-items: center; gap: 8px; margin-top: 22px; color: var(--md-muted); font-size: 12.5px; }
.footer-links .link { color: var(--md-gold); }
.footer-links .link:hover { text-decoration: underline; }

.md-auth-foot { margin-top: 36px; color: var(--md-dim); font-size: 11px; line-height: 1.7; text-align: center; }
.md-auth-foot a { color: var(--md-muted); }
.md-auth-foot a:hover { color: var(--md-gold); }

/* 响应式 */
@media (max-width: 1024px) {
    .md-auth { grid-template-columns: 1fr; }
    .md-auth-visual { display: none; }
    .md-auth-panel { padding: 40px 24px; min-height: 100vh; }
}
@media (max-width: 560px) {
    .md-auth-panel { justify-content: flex-start; padding: 30px 20px; }
    .md-auth-head h2 { font-size: 25px; }
    .md-auth-back { margin-bottom: 18px; }
}