#loginPage {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    display: flex;
    justify-content: center;
    align-items: center;
    padding: 24px;
    background: #f0fdfa;
    z-index: 100;
}

#loginPage.login-hidden {
    display: none;
}

.login-box {
    width: 390px;
    max-width: 100%;
    padding: 38px;
    border: 1px solid rgba(255, 255, 255, 0.72);
    border-radius: 26px;
    background: rgba(255, 255, 255, 0.9);
    box-shadow: 0 30px 90px rgba(15, 23, 42, 0.28);
    backdrop-filter: blur(18px);
    text-align: center;
}

.login-box h2 {
    margin-bottom: 28px;
    color: var(--text);
    text-align: center;
    font-size: 24px;
    font-weight: 900;
}

.login-box .form-group label {
    text-align: left;
}

.login-error {
    min-height: 20px;
    margin-bottom: 12px;
    color: var(--danger);
    text-align: center;
    font-size: 13px;
}

.btn-block {
    width: 100%;
    min-height: 44px;
    font-size: 15px;
}

.cell-url {
    display: inline-block;
    max-width: 180px;
    overflow: hidden;
    color: var(--primary);
    text-overflow: ellipsis;
    white-space: nowrap;
    font-size: 12px;
    font-weight: 700;
}

.device-picker {
    position: relative;
    width: 100%;
}

.toolbar .device-picker {
    width: 220px;
}

.device-picker input {
    width: 100%;
}

.device-picker-dropdown {
    position: absolute;
    top: calc(100% + 6px);
    left: 0;
    right: 0;
    z-index: 260;
    display: none;
    max-height: 240px;
    overflow-y: auto;
    border: 1px solid var(--border-strong);
    border-radius: 14px;
    background: #ffffff;
    box-shadow: 0 18px 42px rgba(15, 23, 42, 0.16);
}

.device-picker-dropdown.active {
    display: block;
}

.device-picker-option {
    width: 100%;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 12px;
    padding: 10px 12px;
    border: none;
    border-bottom: 1px solid #eef2f7;
    background: transparent;
    color: var(--text);
    cursor: pointer;
    text-align: left;
}

.device-picker-option:last-child {
    border-bottom: none;
}

.device-picker-option:hover {
    background: #f0fdfa;
    color: var(--primary-hover);
}

.device-picker-option strong {
    font-size: 13px;
    font-weight: 850;
}

.device-picker-option span {
    color: var(--text-secondary);
    font-size: 12px;
}

.device-picker-empty {
    padding: 12px;
    color: var(--text-secondary);
    font-size: 13px;
    text-align: center;
}

body.dark-mode .device-picker-dropdown {
    background: #111827;
    border-color: #334155;
    box-shadow: 0 18px 42px rgba(0, 0, 0, 0.34);
}

body.dark-mode .device-picker-option {
    color: #e5eef8;
    border-color: #263244;
}

body.dark-mode .device-picker-option:hover {
    background: #1e293b;
    color: #5eead4;
}

body.dark-mode .device-picker-option span,
body.dark-mode .device-picker-empty {
    color: #cbd5e1;
}

/* ======================== 快速添加按钮 ======================== */
.picker-row {
    display: flex;
    align-items: flex-start;
    gap: 6px;
}

.quick-add-btn {
    width: 32px;
    height: 40px;
    padding: 0;
    border-radius: 10px;
    font-size: 18px;
    font-weight: 900;
    line-height: 1;
    flex-shrink: 0;
}

.quick-add-inline {
    display: flex;
    flex-direction: column;
    gap: 8px;
    padding: 10px 12px;
    border: 1px solid var(--border-strong);
    border-radius: 12px;
    background: #f8fafc;
    margin-top: 2px;
}

.quick-add-inline input,
.quick-add-inline select {
    width: 100%;
    padding: 6px 10px;
    border: 1px solid var(--border);
    border-radius: 8px;
    font-size: 12px;
    background: #fff;
    color: var(--text);
    outline: none;
}
.quick-add-inline input:focus,
.quick-add-inline select:focus {
    border-color: #5eead4;
    box-shadow: 0 0 0 3px rgba(20,184,166,0.12);
}

.quick-add-inline-row {
    display: flex;
    gap: 6px;
}
.quick-add-inline-row button {
    flex: 1;
    min-height: 30px;
    font-size: 12px;
}

body.dark-mode .quick-add-inline {
    background: #172033;
    border-color: #334155;
}
body.dark-mode .quick-add-inline input,
body.dark-mode .quick-add-inline select {
    background: #0f172a;
    color: #e5eef8;
    border-color: #334155;
}

/* ======================== 汉堡按钮 + 遮罩 (桌面隐藏) ======================== */
.menu-toggle-btn {
    display: none;
}

.sidebar-overlay {
    display: none;
    position: fixed;
    inset: 0;
    z-index: 80;
    background: rgba(15, 23, 42, 0.45);
    backdrop-filter: blur(2px);
}

@media (max-width: 1200px) {
    .app-shell { grid-template-columns: 220px minmax(0, 1fr); }
    .stats-grid { grid-template-columns: repeat(3, 1fr); }
}

@media (max-width: 900px) {
    .app-shell { grid-template-columns: 1fr; }

    /* 汉堡按钮 */
    .menu-toggle-btn {
        display: flex;
        align-items: center;
        justify-content: center;
        width: 42px;
        height: 42px;
        flex-shrink: 0;
        padding: 0;
        border: 1px solid var(--border);
        border-radius: 12px;
        background: var(--card-bg);
        color: var(--text);
        cursor: pointer;
    }
    .menu-toggle-btn svg {
        width: 22px;
        height: 22px;
        stroke: currentColor;
        fill: none;
        stroke-width: 2;
    }

    /* 侧边栏变为抽屉 */
    .sidebar {
        position: fixed;
        top: 0;
        left: 0;
        width: 280px;
        max-width: 85vw;
        height: 100vh;
        height: 100dvh;
        z-index: 100;
        transform: translateX(-100%);
        transition: transform 0.3s cubic-bezier(0.4, 0, 0.2, 1);
        box-shadow: 8px 0 32px rgba(15, 23, 42, 0.18);
        overflow-y: auto;
    }

    .sidebar.open {
        transform: translateX(0);
    }

    .sidebar-overlay.show {
        display: block;
    }

    .workspace { padding: 0 16px 16px; }
    .workspace-header {
        align-items: center;
        flex-direction: row;
        gap: 12px;
        margin: 0 -16px 20px;
        padding: 16px;
    }
    .workspace-header > div { flex: 1; min-width: 0; }
    .topbar-actions { flex-shrink: 0; justify-content: flex-end; }
    .stats-grid { grid-template-columns: repeat(2, 1fr); }
    .form-row,
    .device-form-grid { grid-template-columns: 1fr; }
    .toolbar { align-items: stretch; flex-direction: column; }
    .toolbar-right { width: 100%; margin-left: 0; flex-direction: column; align-items: stretch; }
    .toolbar input,
    .toolbar .device-picker { width: 100%; }
}

@media (max-width: 560px) {
    .stats-grid { grid-template-columns: 1fr; }
    .detail-grid { grid-template-columns: 1fr; }
    .workspace-header h2 { font-size: 24px; }
    .profile-text { display: none; }
    .profile-dropdown { right: -8px; }
    .modal-overlay { padding: 24px 12px; }
}