/* 售货机系统独立登录页 */
:root {
    --brand: #1677ff;
    --brand-dark: #0e5fd8;
    --ink: #1f2430;
    --muted: #6b7280;
}

* { box-sizing: border-box; }

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

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC", "Microsoft YaHei", sans-serif;
    color: var(--ink);
    background: #f4f7fd;
}

/* 背景：蓝色渐变 + 网格 + 光斑 */
.vlg-bg { position: fixed; inset: 0; z-index: 0; overflow: hidden; background: linear-gradient(150deg, #eaf2ff 0%, #dbe9ff 45%, #c8ddfd 100%); }
.vlg-grid {
    position: absolute; inset: 0;
    background-image:
        linear-gradient(rgba(22, 119, 255, .06) 1px, transparent 1px),
        linear-gradient(90deg, rgba(22, 119, 255, .06) 1px, transparent 1px);
    background-size: 40px 40px;
    mask-image: radial-gradient(ellipse 70% 60% at 50% 40%, #000 15%, transparent 75%);
    -webkit-mask-image: radial-gradient(ellipse 70% 60% at 50% 40%, #000 15%, transparent 75%);
}
.vlg-orb { position: absolute; border-radius: 50%; filter: blur(60px); opacity: .45; }
.vlg-orb-1 { width: 420px; height: 420px; left: -120px; top: -120px; background: radial-gradient(circle, #1677ff, transparent 70%); }
.vlg-orb-2 { width: 480px; height: 480px; right: -140px; bottom: -140px; background: radial-gradient(circle, #38bdf8, transparent 70%); }

.vlg-wrap {
    position: relative; z-index: 1;
    min-height: 100vh;
    display: flex; align-items: center; justify-content: center;
    padding: 24px;
}

.vlg-card {
    width: 100%;
    max-width: 420px;
    background: rgba(255, 255, 255, .94);
    border-radius: 18px;
    padding: 40px 38px 30px;
    box-shadow: 0 24px 70px rgba(10, 72, 168, .16);
    backdrop-filter: blur(8px);
}

.vlg-brand { display: flex; align-items: center; gap: 12px; }
.vlg-brand-mark {
    width: 46px; height: 46px;
    display: flex; align-items: center; justify-content: center;
    background: linear-gradient(135deg, #1677ff 0%, #0a48a8 100%);
    color: #fff;
    font-size: 22px;
    font-weight: 700;
    border-radius: 12px;
    box-shadow: 0 10px 24px rgba(22, 119, 255, .35);
}
.vlg-brand-text { display: flex; flex-direction: column; line-height: 1.2; }
.vlg-brand-text strong { font-size: 19px; }
.vlg-brand-text small { font-size: 10px; color: var(--muted); letter-spacing: 1.5px; margin-top: 2px; }

.vlg-subtitle { font-size: 14px; color: var(--muted); margin: 14px 0 24px; }

.vlg-error {
    background: #fef2f2;
    border: 1px solid #fecaca;
    color: #b91c1c;
    border-radius: 10px;
    padding: 10px 14px;
    font-size: 13px;
    margin-bottom: 16px;
}

.vlg-field { margin-bottom: 18px; }
.vlg-field label { display: block; font-size: 13px; font-weight: 600; color: #374151; margin-bottom: 6px; }
.vlg-field .form-control {
    height: 46px;
    border: 1px solid #d7dee8;
    border-radius: 10px;
    font-size: 14px;
    padding: 0 14px;
    transition: border-color .2s, box-shadow .2s;
}
.vlg-field .form-control:focus {
    border-color: #1677ff;
    box-shadow: 0 0 0 3px rgba(22, 119, 255, .14);
}

.vlg-captcha-row { display: flex; align-items: flex-end; gap: 12px; }
.vlg-captcha { flex: 0 0 128px; height: 46px; }
.vlg-captcha img { width: 100%; height: 100%; border-radius: 10px; border: 1px solid #d7dee8; cursor: pointer; object-fit: cover; }

.vlg-submit {
    width: 100%;
    height: 48px;
    margin-top: 6px;
    border: 0;
    border-radius: 12px;
    background: linear-gradient(135deg, #1677ff 0%, #0a48a8 100%);
    color: #fff;
    font-size: 16px;
    font-weight: 700;
    letter-spacing: 6px;
    cursor: pointer;
    box-shadow: 0 12px 28px rgba(22, 119, 255, .32);
    transition: transform .2s, box-shadow .2s;
}
.vlg-submit:hover { transform: translateY(-1px); box-shadow: 0 16px 34px rgba(22, 119, 255, .40); }

.vlg-foot { display: flex; justify-content: space-between; margin-top: 22px; font-size: 13px; }
.vlg-foot a { color: var(--muted); text-decoration: none; }
.vlg-foot a:hover { color: var(--brand-dark); }

@media (max-width: 480px) {
    .vlg-card { padding: 32px 24px 24px; }
    .vlg-foot { flex-direction: column; gap: 8px; }
}