html {
    font-size: 14px;
}

:root {
    --font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', 'Noto Sans', sans-serif;
    --font-size-base: 14px;
    --primary: #1d4ed8;
    --primary-dark: #1e40af;
    --primary-contrast: #ffffff;
    --surface: #ffffff;
    --muted: #8c8c8c;
    --danger: #ff4d4f;
    --success: #52c41a;
    --action-bg: #f8fafc;
    --card-radius: 8px;
    --border-color: #e5e7eb;
    --shadow-sm: 0 1px 2px rgba(15, 23, 42, .06);
    --shadow-md: 0 10px 30px rgba(15, 23, 42, .10);
}

html { font-size: var(--font-size-base); }

html, body {
    font-family: var(--font-family);
    background: #f8fafc;
    color: #334155;
    letter-spacing: .015em;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

a {
    color: var(--primary);
    text-decoration: none;
}

a:hover {
    color: #2563eb;
}

a, .btn-link {
    color: var(--primary);
}

.btn-primary {
    color: var(--primary-contrast);
    background-color: var(--primary);
    border-color: var(--primary-dark);
}

.btn-light {
    color: rgba(0, 0, 0, 0.88);
    background: #fff;
    border: 1px solid #d9d9d9;
}

.btn-light:hover {
    color: #1677ff;
    border-color: #4096ff;
    background: #fff;
}

.ant-btn {
    border-radius: 8px;
    border: 1px solid #e2e8f0;
    background: #ffffff;
    color: #475569;
    height: 34px;
    padding: 4px 18px;
    font-size: 14px;
    font-weight: 500;
    line-height: 1.5715;
    cursor: pointer;
    transition: all .2s cubic-bezier(0.4, 0, 0.2, 1);
    box-shadow: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
}

.ant-tag {
    display: inline-flex;
    align-items: center;
    border-radius: 6px;
    padding: 0 8px;
    height: 22px;
    font-size: 12px;
    border: 1px solid var(--border-color);
    background: #fafafa;
}

.ant-btn:hover {
    color: #2563eb;
    border-color: #2563eb;
}

.ant-btn-default {
    background: #fff;
}

.ant-btn-sm {
    height: 24px;
    padding: 0 7px;
    font-size: 12px;
}

.ant-spin-wrap {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 20px;
    color: rgba(0, 0, 0, 0.65);
}

.ant-spin-dot {
    width: 16px;
    height: 16px;
    border: 2px solid #91caff;
    border-top-color: var(--primary);
    border-radius: 50%;
    animation: antSpin 1s linear infinite;
}

@keyframes antSpin {
    to {
        transform: rotate(360deg);
    }
}

.btn:focus, .btn:active:focus, .btn-link.nav-link:focus, .form-control:focus, .form-check-input:focus {
  box-shadow: 0 0 0 2px rgba(5,145,255,.12);
}

.content {
    padding-top: .65rem;
}

h1:focus {
    outline: none;
}

.valid.modified:not([type=checkbox]) { outline: 1px solid var(--success); }
.invalid { outline: 1px solid var(--danger); }
.validation-message { color: var(--danger); }

.blazor-error-boundary {
    background: url(data:image/svg+xml;base64,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) no-repeat 1rem/1.8rem, #b32121;
    padding: 1rem 1rem 1rem 3.7rem;
    color: white;
}

    .blazor-error-boundary::after {
        content: "An error has occurred."
    }

.form-floating > .form-control-plaintext::placeholder, .form-floating > .form-control::placeholder {
    color: var(--bs-secondary-color);
    text-align: end;
}

.form-floating > .form-control-plaintext:focus::placeholder, .form-floating > .form-control:focus::placeholder {
    text-align: start;
}

.action-bar-fixed {
    position: fixed;
    top: 4.2rem;
    right: 1.25rem;
    z-index: 1100;
    background: rgba(255, 255, 255, 0.97);
    backdrop-filter: blur(8px);
    padding: .45rem;
    border-radius: 8px;
    border: 1px solid #f0f0f0;
    box-shadow: var(--shadow-md);
}

.modern-btn-primary {
    color: #ffffff;
    background: linear-gradient(135deg, #3b82f6 0%, #2563eb 100%);
    border: none;
    border-radius: 8px;
    padding: .5rem 1.2rem;
    font-size: 14px;
    font-weight: 600;
    box-shadow: 0 4px 6px -1px rgba(37, 99, 235, 0.2);
    transition: all .3s cubic-bezier(0.4, 0, 0.2, 1);
    letter-spacing: 0.015em;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
}

.modern-btn-primary:hover {
    color: #ffffff;
    background: linear-gradient(135deg, #60a5fa 0%, #3b82f6 100%);
    transform: translateY(-1px);
    box-shadow: 0 6px 10px -1px rgba(37, 99, 235, 0.3);
}

.modern-btn-secondary {
    color: #475569;
    background: #ffffff;
    border: 1px solid #cbd5e1;
    border-radius: 8px;
    padding: .5rem 1.2rem;
    font-size: 14px;
    font-weight: 600;
    transition: all .3s cubic-bezier(0.4, 0, 0.2, 1);
    box-shadow: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
}

.modern-btn-secondary:hover {
    color: #1e293b;
    border-color: #94a3b8;
    background: #f8fafc;
    transform: translateY(-1px);
    box-shadow: 0 2px 4px 0 rgba(0, 0, 0, 0.08);
}

.modern-btn-primary:disabled,
.modern-btn-secondary:disabled {
    opacity: 1;
    cursor: not-allowed;
    transform: none;
    box-shadow: none;
}

.modern-btn-primary:disabled {
    color: rgba(0, 0, 0, 0.25);
    background: #f5f5f5;
    border-color: #d9d9d9;
}

.modern-btn-secondary:disabled {
    color: rgba(0, 0, 0, 0.25);
    background: #f5f5f5;
    border-color: #d9d9d9;
}

.login-card {
    border-radius: 16px;
    box-shadow: 0 20px 60px -10px rgba(15, 23, 42, 0.15);
    background: rgba(255, 255, 255, 0.85);
    backdrop-filter: blur(20px);
    border: 1px solid rgba(255, 255, 255, 0.5);
    overflow: hidden;
}

.ant-login-shell {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, #e0e7ff 0%, #cbd5e1 50%, #f8fafc 100%);
    position: relative;
}

.ant-login-wrapper {
    width: 100%;
    max-width: 420px;
    padding: 2rem;
    z-index: 10;
}

.login-card-body {
    padding: 2.5rem 2rem;
}

.login-title {
    font-size: 1.75rem;
    font-weight: 700;
    color: #1e293b;
    text-align: center;
    margin-bottom: 2rem;
    letter-spacing: -0.02em;
}

.login-btn {
    height: 48px;
    font-size: 16px;
    font-weight: 600;
    letter-spacing: 0.02em;
    border-radius: 8px;
    margin-top: 1rem;
    background: linear-gradient(135deg, #2563eb 0%, #1d4ed8 100%);
    border: none;
    color: white;
    transition: all 0.3s ease;
    box-shadow: 0 4px 12px rgba(37, 99, 235, 0.25);
}

.login-btn:hover {
    background: linear-gradient(135deg, #3b82f6 0%, #2563eb 100%);
    transform: translateY(-2px);
    box-shadow: 0 6px 16px rgba(37, 99, 235, 0.35);
    color: white;
}

.login-btn:disabled {
    background: #cbd5e1;
    transform: none;
    box-shadow: none;
}

.login-input {
    height: 44px;
    border-radius: 8px;
    background-color: #f8fafc;
    border: 1px solid #e2e8f0;
}

.login-input:focus {
    background-color: #ffffff;
}

.ant-captcha-btn-layout {
    border-top-right-radius: 8px;
    border-bottom-right-radius: 8px;
    background: #f1f5f9;
    border-color: #e2e8f0;
    color: #334155;
    min-width: 100px;
}

.spinner-border {
    border-color: rgba(22, 119, 255, .2);
    border-right-color: #1677ff;
}

/* Typography tweaks */
.page-title {
    font-size: 1.5rem;
    font-weight: 600;
    color: #1e293b;
    margin: 0;
    line-height: 1.2;
}

.table th, .table td {
    font-size: 12px;
    vertical-align: middle;
    padding: .75rem 1rem;
}

.form-label {
    font-size: 14px;
    font-weight: 500;
    margin-bottom: .25rem;
    color: #475569;
}

.modern-card {
    background: #ffffff;
    border-radius: 12px;
    border: 1px solid #e2e8f0;
    box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.05), 0 2px 4px -1px rgba(0, 0, 0, 0.03);
    transition: box-shadow 0.3s ease, transform 0.3s ease;
}

.modern-card:hover {
    box-shadow: 0 10px 15px -3px rgba(0, 0, 0, 0.08), 0 4px 6px -2px rgba(0, 0, 0, 0.04);
}

.modern-card .card-header {
    background: transparent;
    border-bottom: 1px solid #f1f5f9;
    padding: 1rem 1.25rem;
    font-weight: 600;
    color: #1e293b;
    font-size: 1.1rem;
}

.modern-card .card-body {
    padding: 1.25rem;
}

.table th {
    background-color: #f8fafc;
    color: #475569;
    font-weight: 600;
    text-transform: none;
    font-size: 0.85rem;
    letter-spacing: normal;
    border-bottom: 2px solid #e2e8f0;
}

.table td {
    color: #334155;
    border-bottom: 1px solid #f1f5f9;
    vertical-align: middle;
}

.table-striped > tbody > tr:nth-of-type(odd) > * {
    background-color: #fcfcfd;
}

.table-hover > tbody > tr:hover > * {
    background-color: #f1f5f9;
}

.alert {
    border-radius: 8px;
    border: none;
    box-shadow: 0 2px 4px rgba(0,0,0,0.02);
}

.form-control, .form-select {
    font-size: 14px;
    padding: .5rem .75rem;
    border-radius: 8px;
    border: 1px solid #cbd5e1;
    background-color: #f8fafc;
    transition: all 0.2s ease;
}

.form-control:focus, .form-select:focus {
    background-color: #ffffff;
    border-color: #3b82f6;
    box-shadow: 0 0 0 3px rgba(59, 130, 246, .15);
}

.serial-port-group .form-select,
.serial-port-group .serial-refresh-btn {
    height: calc(2.25rem + 2px);
}

.serial-port-group .serial-refresh-btn {
    min-width: 64px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
}

/* Drag-and-drop reorder styles */
.drag-handle-cell { vertical-align: middle; }
.drag-over { background-color: #eef2ff; }
.dragging { opacity: 0.6; }

/* Row action buttons: hidden by default, show on row hover */
#dataItemsBody tr .row-actions { opacity: 0; transform: translateY(4px); transition: opacity .12s ease, transform .12s ease; pointer-events: none; }
#dataItemsBody tr:hover .row-actions { opacity: 1; transform: translateY(0); pointer-events: auto; }
#dataItemsBody tr .row-actions .btn { padding: .28rem .45rem; min-width: 34px; display:inline-flex; align-items:center; justify-content:center; }