/* ========================================
   DailyBox — Global Styles
   Premium modern design system
   ======================================== */

/* --- CSS Variables --- */
:root {
    --color-primary: #4f46e5;
    --color-primary-hover: #4338ca;
    --color-primary-light: #eef2ff;
    --color-bg: #f8fafc;
    --color-surface: #ffffff;
    --color-border: #e2e8f0;
    --color-text: #1e293b;
    --color-text-secondary: #64748b;
    --color-text-muted: #94a3b8;
    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.07), 0 2px 4px -2px rgba(0, 0, 0, 0.05);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.08), 0 4px 6px -4px rgba(0, 0, 0, 0.04);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.08), 0 8px 10px -6px rgba(0, 0, 0, 0.04);
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 16px;
    --radius-xl: 20px;
}

/* --- Base Reset --- */
*, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html, body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Inter', Roboto, 'Helvetica Neue', Arial, sans-serif;
    font-size: 16px;
    line-height: 1.6;
    color: var(--color-text);
    background-color: var(--color-bg);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

h1:focus {
    outline: none;
}

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

a:hover {
    color: var(--color-primary-hover);
}

/* --- Animations --- */
@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(12px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes scaleIn {
    from {
        opacity: 0;
        transform: scale(0.95);
    }
    to {
        opacity: 1;
        transform: scale(1);
    }
}

.fade-in {
    animation: fadeIn 0.35s cubic-bezier(0.4, 0, 0.2, 1);
}

/* ========================================
   License Plate Page
   ======================================== */
.license-plate-page {
    max-width: 720px;
    margin: 0 auto;
}

.page-header {
    text-align: center;
    margin-bottom: 2.5rem;
}

.page-title {
    font-size: 2rem;
    font-weight: 800;
    color: var(--color-text);
    letter-spacing: -0.02em;
    margin-bottom: 0.5rem;
}

.page-subtitle {
    font-size: 1.05rem;
    color: var(--color-text-secondary);
    font-weight: 400;
}

/* Plate display boxes */
.plate-display {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 1rem;
    margin-bottom: 2.5rem;
}

.plate-box {
    width: 120px;
    height: 120px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 3rem;
    font-weight: 700;
    background: var(--color-surface);
    border: 2.5px solid var(--color-border);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-md);
    cursor: pointer;
    color: var(--color-text-muted);
    transition: all 0.25s cubic-bezier(0.4, 0, 0.2, 1);
    user-select: none;
}

.plate-box:hover {
    border-color: var(--color-primary);
    box-shadow: var(--shadow-lg);
    transform: translateY(-2px);
}

.plate-box.active {
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px rgba(79, 70, 229, 0.15), var(--shadow-lg);
}

.plate-box.has-value {
    color: var(--color-text);
    background: var(--color-primary-light);
    border-color: var(--color-primary);
}

.plate-separator {
    font-size: 2.5rem;
    font-weight: 300;
    color: var(--color-text-muted);
}

/* Selector panel */
.selector-panel {
    background: var(--color-surface);
    border-radius: var(--radius-xl);
    padding: 2rem;
    margin-bottom: 2rem;
    box-shadow: var(--shadow-lg);
    border: 1px solid var(--color-border);
}

.selector-title {
    font-size: 1rem;
    font-weight: 600;
    color: var(--color-text-secondary);
    margin-bottom: 1.25rem;
    text-align: center;
}

/* Keyboard selector */
.keyboard-grid {
    display: flex;
    flex-direction: column;
    gap: 0.6rem;
}

.keyboard-row {
    display: flex;
    justify-content: center;
    gap: 0.5rem;
    flex-wrap: wrap;
}

.keyboard-key {
    min-width: 52px;
    height: 52px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    font-size: 1.15rem;
    font-weight: 600;
    background: #f8fafc;
    color: var(--color-text);
    border: 1.5px solid #e2e8f0;
    border-radius: var(--radius-sm);
    cursor: pointer;
    transition: all 0.18s ease;
    user-select: none;
    padding: 0 0.4rem;
}

.keyboard-key:hover {
    background: var(--color-primary-light);
    border-color: var(--color-primary);
    color: var(--color-primary);
    transform: translateY(-1px);
    box-shadow: var(--shadow-sm);
}

.keyboard-key.selected {
    background: var(--color-primary);
    color: #ffffff;
    border-color: var(--color-primary);
    box-shadow: 0 2px 8px rgba(79, 70, 229, 0.35);
    transform: translateY(-1px);
}

/* Result card */
.result-card {
    background: var(--color-surface);
    border-radius: var(--radius-xl);
    overflow: hidden;
    box-shadow: var(--shadow-xl);
    border: 1px solid var(--color-border);
    margin-top: 1rem;
}

.result-header {
    display: flex;
    align-items: center;
    gap: 0.6rem;
    padding: 1.25rem 2rem;
    background: linear-gradient(135deg, #4f46e5, #6366f1);
    color: #ffffff;
    font-size: 1.1rem;
    font-weight: 600;
}

.result-icon {
    font-size: 1.25rem;
}

.result-body {
    padding: 1.5rem 2rem;
}

.result-item {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 1rem 0;
}

.result-label {
    font-size: 0.95rem;
    color: var(--color-text-secondary);
    font-weight: 500;
}

.result-value {
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--color-text);
}

.result-value.plate-value {
    font-size: 1.4rem;
    color: var(--color-primary);
    letter-spacing: 0.05em;
}

.result-divider {
    height: 1px;
    background: var(--color-border);
}

/* --- Province Full Plate Table --- */
.province-table-card {
    background: var(--color-surface);
    border-radius: var(--radius-xl);
    overflow: hidden;
    box-shadow: var(--shadow-lg);
    border: 1px solid var(--color-border);
    margin-top: 1.5rem;
}

.province-table-body {
    padding: 0.5rem 0;
}

.province-table {
    width: 100%;
    border-collapse: collapse;
    font-size: 0.95rem;
}

.province-table thead th {
    padding: 0.75rem 2rem;
    text-align: left;
    font-weight: 600;
    color: var(--color-text-secondary);
    font-size: 0.85rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    border-bottom: 1px solid var(--color-border);
}

.province-table tbody tr {
    transition: background-color 0.15s ease;
}

.province-table tbody tr:hover {
    background: var(--color-primary-light);
}

.province-table tbody tr.active-row {
    background: #eef2ff;
    font-weight: 600;
}

.province-table tbody tr.active-row .plate-cell {
    color: var(--color-primary);
}

.province-table tbody td {
    padding: 0.7rem 2rem;
    color: var(--color-text);
    border-bottom: 1px solid #f1f5f9;
}

.province-table tbody tr:last-child td {
    border-bottom: none;
}

.province-table .plate-cell {
    font-weight: 600;
    color: var(--color-text);
    letter-spacing: 0.03em;
    white-space: nowrap;
    width: 100px;
}

/* Discontinued plate code badge */
.badge-discontinued {
    display: inline-block;
    margin-left: 0.5rem;
    padding: 0.1rem 0.5rem;
    font-size: 0.75rem;
    font-weight: 600;
    color: #b91c1c;
    background: #fee2e2;
    border-radius: var(--radius-sm, 4px);
    white-space: nowrap;
}

/* Footnote/annotation text */
.result-note .note-text,
.table-note {
    font-size: 0.85rem;
    font-weight: 400;
    color: var(--color-text-secondary);
    line-height: 1.5;
}

.table-note {
    margin-top: 0.25rem;
}

/* ========================================
   USCC Page (统一社会信用代码)
   ======================================== */
.uscc-page {
    max-width: 720px;
    margin: 0 auto;
}

.uscc-input-card {
    background: var(--color-surface);
    border-radius: var(--radius-xl);
    padding: 1.75rem 2rem;
    box-shadow: var(--shadow-lg);
    border: 1px solid var(--color-border);
    margin-bottom: 1.5rem;
}

.uscc-input-label {
    display: block;
    font-size: 0.95rem;
    font-weight: 600;
    color: var(--color-text-secondary);
    margin-bottom: 0.75rem;
}

.uscc-input {
    width: 100%;
    padding: 0.95rem 1.1rem;
    font-size: 1.15rem;
    font-weight: 600;
    font-family: 'SFMono-Regular', 'Consolas', 'Liberation Mono', Menlo, monospace;
    letter-spacing: 0.08em;
    color: var(--color-text);
    background: #f8fafc;
    border: 2px solid var(--color-border);
    border-radius: var(--radius-md);
    outline: none;
    transition: all 0.2s ease;
    text-transform: uppercase;
}

.uscc-input:focus {
    border-color: var(--color-primary);
    background: var(--color-surface);
    box-shadow: 0 0 0 3px rgba(79, 70, 229, 0.12);
}

.uscc-input::placeholder {
    color: var(--color-text-muted);
    font-weight: 400;
    letter-spacing: 0.04em;
}

.uscc-hint {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-top: 0.75rem;
    font-size: 0.85rem;
    color: var(--color-text-secondary);
}

.uscc-hint-counter {
    font-variant-numeric: tabular-nums;
    color: var(--color-text-muted);
    font-weight: 600;
}

.uscc-hint-error {
    color: #b45309;
    font-weight: 500;
}

.uscc-warning {
    display: flex;
    align-items: center;
    gap: 0.6rem;
    padding: 1rem 1.5rem;
    background: #fef3c7;
    border: 1px solid #fde68a;
    color: #92400e;
    border-radius: var(--radius-md);
    font-size: 0.95rem;
    margin-top: 1rem;
}

.uscc-warning-icon {
    font-size: 1.1rem;
}

.uscc-structure-card {
    background: var(--color-surface);
    border-radius: var(--radius-xl);
    overflow: hidden;
    box-shadow: var(--shadow-md);
    border: 1px solid var(--color-border);
    margin-top: 1.5rem;
}

.uscc-structure-body {
    padding: 0.5rem 2rem 1rem;
}

.uscc-structure-row {
    display: flex;
    align-items: center;
    padding: 0.75rem 0;
    border-bottom: 1px solid #f1f5f9;
}

.uscc-structure-row:last-child {
    border-bottom: none;
}

.uscc-structure-row.highlight .uscc-structure-pos {
    background: var(--color-primary);
    color: #ffffff;
}

.uscc-structure-row.highlight .uscc-structure-desc {
    color: var(--color-primary);
    font-weight: 600;
}

.uscc-structure-pos {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-width: 92px;
    padding: 0.3rem 0.7rem;
    background: var(--color-primary-light);
    color: var(--color-primary);
    border-radius: var(--radius-sm);
    font-size: 0.82rem;
    font-weight: 700;
    margin-right: 1rem;
}

.uscc-structure-desc {
    font-size: 0.95rem;
    color: var(--color-text);
}

/* ========================================
   About Page
   ======================================== */
.about-page {
    max-width: 640px;
    margin: 0 auto;
    padding: 1rem 0;
}

.about-card {
    background: var(--color-surface);
    border-radius: var(--radius-xl);
    padding: 3rem;
    box-shadow: var(--shadow-lg);
    border: 1px solid var(--color-border);
}

.about-header {
    text-align: center;
    margin-bottom: 2.5rem;
    padding-bottom: 2rem;
    border-bottom: 1px solid var(--color-border);
}

.about-logo {
    font-size: 3.5rem;
    display: block;
    margin-bottom: 1rem;
}

.about-header h1 {
    font-size: 2.2rem;
    font-weight: 800;
    letter-spacing: -0.03em;
    margin-bottom: 0.4rem;
}

.about-tagline {
    font-size: 1.05rem;
    color: var(--color-text-secondary);
}

.about-section {
    margin-bottom: 2rem;
}

.about-section:last-child {
    margin-bottom: 0;
}

.about-section h3 {
    font-size: 1.05rem;
    font-weight: 700;
    margin-bottom: 0.75rem;
    color: var(--color-text);
}

.about-section p {
    color: var(--color-text-secondary);
    line-height: 1.7;
}

.tech-stack {
    display: flex;
    flex-wrap: wrap;
    gap: 0.6rem;
}

.tech-badge {
    display: inline-flex;
    align-items: center;
    padding: 0.45rem 1rem;
    background: var(--color-primary-light);
    color: var(--color-primary);
    border-radius: 999px;
    font-size: 0.88rem;
    font-weight: 600;
}

.github-link {
    display: inline-flex;
    align-items: center;
    gap: 0.4rem;
    padding: 0.6rem 1.2rem;
    background: var(--color-text);
    color: #ffffff;
    border-radius: var(--radius-sm);
    font-weight: 500;
    font-size: 0.92rem;
    transition: all 0.2s ease;
}

.github-link:hover {
    background: #0f172a;
    color: #ffffff;
    transform: translateY(-1px);
    box-shadow: var(--shadow-md);
}

.info-row {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0.55rem 0;
    border-bottom: 1px solid var(--color-border);
    font-size: 0.92rem;
}

.info-row:last-child {
    border-bottom: none;
}

.info-label {
    color: var(--color-text-secondary);
}

.info-value {
    font-weight: 600;
    color: var(--color-text);
}

/* ========================================
   Blazor System UI
   ======================================== */
#blazor-error-ui {
    color-scheme: light only;
    background: lightyellow;
    bottom: 0;
    box-shadow: 0 -1px 2px rgba(0, 0, 0, 0.2);
    display: none;
    left: 0;
    padding: 0.6rem 1.25rem 0.7rem 1.25rem;
    position: fixed;
    width: 100%;
    z-index: 1000;
}

#blazor-error-ui .dismiss {
    cursor: pointer;
    position: absolute;
    right: 0.75rem;
    top: 0.5rem;
}

.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."
}

/* Loading spinner */
.loading-progress {
    position: absolute;
    display: block;
    width: 8rem;
    height: 8rem;
    inset: 20vh 0 auto 0;
    margin: 0 auto;
}

.loading-progress circle {
    fill: none;
    stroke: #e0e0e0;
    stroke-width: 0.6rem;
    transform-origin: 50% 50%;
    transform: rotate(-90deg);
}

.loading-progress circle:last-child {
    stroke: var(--color-primary);
    stroke-dasharray: calc(3.141 * var(--blazor-load-percentage, 0%) * 0.8), 500%;
    transition: stroke-dasharray 0.05s ease-in-out;
}

.loading-progress-text {
    position: absolute;
    text-align: center;
    font-weight: bold;
    inset: calc(20vh + 3.25rem) 0 auto 0.2rem;
}

.loading-progress-text::after {
    content: var(--blazor-load-percentage-text, "Loading");
}

/* ========================================
   Responsive Adjustments
   ======================================== */
@media (max-width: 768px) {
    .plate-box {
        width: 90px;
        height: 90px;
        font-size: 2.2rem;
    }

    .plate-separator {
        font-size: 1.8rem;
    }

    .keyboard-key {
        min-width: 42px;
        height: 42px;
        font-size: 1rem;
    }

    .selector-panel {
        padding: 1.25rem;
    }

    .result-body {
        padding: 1rem 1.25rem;
    }

    .about-card {
        padding: 2rem 1.5rem;
    }

    .page-title {
        font-size: 1.5rem;
    }
}