/* 科技风登录页 · 深紫藏蓝 + 粒子背景 */
.login-tech {
    margin: 0;
    min-height: 100vh;
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
    overflow: hidden;
    background: linear-gradient(135deg, #0a0618 0%, #12102a 35%, #0d1b3e 70%, #15082a 100%);
    color: #e9e4ff;
}

#loginParticles {
    position: fixed;
    inset: 0;
    width: 100%;
    height: 100%;
    z-index: 0;
    pointer-events: none;
}

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

.login-card {
    width: 100%;
    max-width: 420px;
    padding: 40px 36px 36px;
    background: rgba(18, 12, 42, 0.72);
    border: 1px solid rgba(168, 85, 247, 0.35);
    border-radius: 16px;
    box-shadow:
        0 0 0 1px rgba(139, 92, 246, 0.1),
        0 8px 32px rgba(0, 0, 0, 0.45),
        0 0 60px rgba(124, 58, 237, 0.25),
        0 0 120px rgba(99, 102, 241, 0.12);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
}

.login-brand {
    text-align: center;
    margin-bottom: 32px;
}

.login-logo {
    width: 56px;
    height: 56px;
    margin: 0 auto 16px;
    border-radius: 14px;
    background: linear-gradient(135deg, #a855f7, #6366f1);
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 0 24px rgba(168, 85, 247, 0.5);
}

.login-logo svg {
    width: 28px;
    height: 28px;
    color: #fff;
}

.login-card h1 {
    font-size: 22px;
    font-weight: 600;
    margin: 0 0 8px;
    letter-spacing: 0.02em;
    background: linear-gradient(90deg, #e9d5ff, #c4b5fd, #a78bfa);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.login-sub {
    font-size: 13px;
    color: rgba(196, 181, 253, 0.75);
    margin: 0;
}

.login-alert {
    margin-bottom: 20px;
    padding: 10px 14px;
    border-radius: 8px;
    font-size: 13px;
    text-align: center;
}

.login-alert--error {
    background: rgba(239, 68, 68, 0.15);
    border: 1px solid rgba(248, 113, 113, 0.4);
    color: #fecaca;
}

.login-alert--success {
    background: rgba(34, 197, 94, 0.12);
    border: 1px solid rgba(74, 222, 128, 0.35);
    color: #bbf7d0;
}

.login-form {
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.login-field {
    position: relative;
    display: flex;
    align-items: center;
}

.login-field-icon {
    position: absolute;
    left: 14px;
    width: 20px;
    height: 20px;
    color: #94a3b8;
    pointer-events: none;
    display: flex;
    align-items: center;
    justify-content: center;
}

.login-field-icon svg {
    width: 18px;
    height: 18px;
}

.login-field input {
    width: 100%;
    height: 48px;
    padding: 0 16px 0 46px;
    border: none;
    border-radius: 10px;
    background: #ffffff;
    color: #1e293b;
    font-size: 14px;
    font-family: inherit;
    transition: box-shadow 0.2s;
}

.login-field input::placeholder {
    color: #94a3b8;
}

.login-field input:focus {
    outline: none;
    box-shadow:
        0 0 0 3px rgba(168, 85, 247, 0.35),
        0 0 20px rgba(168, 85, 247, 0.2);
}

.login-remember {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 13px;
    color: rgba(196, 181, 253, 0.9);
    cursor: pointer;
    user-select: none;
    margin: -4px 0 0;
}

.login-remember input[type="checkbox"] {
    width: 16px;
    height: 16px;
    margin: 0;
    accent-color: #a855f7;
    cursor: pointer;
}

.login-submit {
    margin-top: 8px;
    height: 48px;
    border: none;
    border-radius: 10px;
    font-size: 15px;
    font-weight: 600;
    font-family: inherit;
    cursor: pointer;
    color: #fff;
    background: linear-gradient(90deg, #9333ea, #7c3aed, #6366f1);
    box-shadow: 0 4px 20px rgba(124, 58, 237, 0.45);
    transition: transform 0.15s, box-shadow 0.15s;
}

.login-submit:hover {
    transform: translateY(-1px);
    box-shadow: 0 6px 28px rgba(124, 58, 237, 0.55);
}

.login-submit:active {
    transform: translateY(0);
}

.login-footer {
    margin-top: 24px;
    text-align: center;
    font-size: 12px;
    color: rgba(148, 163, 184, 0.7);
}

@media (max-width: 480px) {
    .login-card {
        padding: 32px 24px 28px;
    }

    .login-card h1 {
        font-size: 20px;
    }
}