/* ===== Pintime Design System ===== */
:root {
    /* Colors */
    --color-primary: #000000;
    --color-secondary: #979797;
    --color-muted: #6D6D6D;
    --color-border: #979797;
    --color-divider: #D9D9D9;
    --color-background: #F5F5F5;
    --color-surface: #FFFFFF;
    --color-accent: #0089D8;
    --color-danger: #DC5050;
    --color-success: #8EE085;
    
    /* Typography */
    --font-family: 'Segoe UI', 'Microsoft YaHei', -apple-system, BlinkMacSystemFont, sans-serif;
    --font-size-xl: 20px;
    --font-size-lg: 16px;
    --font-size-md: 14px;
    --font-size-sm: 12px;
    --font-size-xs: 10px;
    
    /* Spacing */
    --spacing-xs: 4px;
    --spacing-sm: 8px;
    --spacing-md: 16px;
    --spacing-lg: 20px;
    --spacing-xl: 24px;
    
    /* Border radius */
    --radius-sm: 5px;
    --radius-md: 10px;
    --radius-lg: 15px;
}

html, body {
    font-family: var(--font-family);
    font-size: var(--font-size-md);
    color: var(--color-primary);
    margin: 0;
    padding: 0;
    background-color: var(--color-background);
    line-height: 1.5;
}

*, *::before, *::after {
    box-sizing: border-box;
}

h1, h2, h3, h4, h5, h6 {
    margin-top: 0;
    font-weight: 500;
    color: var(--color-primary);
}

h1 { font-size: var(--font-size-xl); }
h2 { font-size: var(--font-size-lg); }

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

a:hover {
    text-decoration: underline;
}

/* Global SVG safeguards: prevent oversized icons from breaking layout */
svg {
    display: inline-block;
    max-width: 24px;
    max-height: 24px;
    vertical-align: middle;
    flex: 0 0 auto;
}

/* Utility classes */
.px-4 {
    padding-left: var(--spacing-lg);
    padding-right: var(--spacing-lg);
}

.ps-3 {
    padding-left: var(--spacing-md);
}

/* Focus styles */
:focus-visible {
    outline: 2px solid var(--color-accent);
    outline-offset: 2px;
}

/* Scrollbar - pintime thin style */
::-webkit-scrollbar {
    width: 4px;
    height: 4px;
}

::-webkit-scrollbar-track {
    background: rgba(0, 0, 0, 0.05);
    border-radius: 2px;
}

::-webkit-scrollbar-thumb {
    background: rgba(0, 0, 0, 0.2);
    border-radius: 2px;
}

::-webkit-scrollbar-thumb:hover {
    background: rgba(0, 0, 0, 0.35);
}

/* Card component - pintime style */
.card {
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    padding: 19px;
    max-width: 100%;
}

/* Sections */
.section {
    margin-bottom: var(--spacing-lg);
}

/* Muted text */
.muted {
    color: var(--color-secondary);
}

/* Grid utilities */
.grid {
    display: grid;
    gap: var(--spacing-lg);
}

.grid-cols-2 { grid-template-columns: repeat(2, 1fr); }
.grid-cols-3 { grid-template-columns: repeat(3, 1fr); }
.grid-cols-4 { grid-template-columns: repeat(4, 1fr); }

/* Button sizes */
.btn-sm { padding: 5px 10px; font-size: var(--font-size-sm); }
.btn-lg { padding: 10px 16px; font-size: var(--font-size-lg); }

/* Flat link button */
.btn-link {
    border: none;
    background: transparent;
    color: var(--color-accent);
    padding: 0;
}
.btn-link:hover { text-decoration: underline; }

/* Table base */
.table {
    width: 100%;
    border-collapse: collapse;
    font-size: var(--font-size-md);
}
.table thead { background: #F7F7F7; }
.table th { text-align: left; font-weight: 500; color: var(--color-primary); }
.table th, .table td { padding: 12px 16px; }
.table tbody tr { border-bottom: 1px solid #F0F0F0; }
.table tbody tr:hover { background: #FAFAFA; }
.table.zebra tbody tr:nth-child(odd) { background: #FCFCFC; }

/* Form layout */
.form-row { display: flex; gap: var(--spacing-md); }
.form-col { flex: 1; }

.card-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 9px;
}

.card-title {
    font-size: var(--font-size-lg);
    font-weight: 500;
    color: var(--color-primary);
}

.card-divider {
    height: 1px;
    background: var(--color-divider);
    margin-bottom: var(--spacing-sm);
}

/* Button styles - pintime style */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-sm);
    padding: 7px 11px;
    font-size: var(--font-size-md);
    font-family: var(--font-family);
    border-radius: var(--radius-sm);
    border: 1px solid var(--color-primary);
    background: transparent;
    color: var(--color-primary);
    cursor: pointer;
    transition: background 0.2s, border-color 0.2s;
}

.btn:hover {
    background: rgba(0, 0, 0, 0.05);
}

.btn-primary {
    border-color: var(--color-accent);
    color: var(--color-accent);
}

.btn-primary:hover {
    background: rgba(0, 137, 216, 0.1);
}

.btn-danger {
    border-color: var(--color-danger);
    color: var(--color-danger);
}

.btn-danger:hover {
    background: rgba(220, 80, 80, 0.1);
}

.btn-solid {
    background: var(--color-primary);
    color: var(--color-surface);
}

.btn-solid:hover {
    background: #333;
}

/* Input styles - pintime style */
.input {
    padding: 8px 12px;
    font-size: var(--font-size-md);
    font-family: var(--font-family);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-sm);
    background: var(--color-surface);
    color: var(--color-primary);
    outline: none;
    transition: border-color 0.2s;
}

.input:focus {
    border-color: var(--color-primary);
}

.input::placeholder {
    color: var(--color-secondary);
}

/* Badge / Tag styles */
.badge {
    display: inline-flex;
    align-items: center;
    padding: 2px 8px;
    font-size: var(--font-size-sm);
    border-radius: var(--radius-sm);
    background: var(--color-divider);
    color: var(--color-muted);
}

.badge-success {
    background: rgba(142, 224, 133, 0.2);
    color: #2d8a24;
}

.badge-danger {
    background: rgba(220, 80, 80, 0.2);
    color: var(--color-danger);
}

/* Online indicator */
.online-dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: var(--color-success);
    display: inline-block;
}

.offline-dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: var(--color-divider);
    display: inline-block;
}

/* Loading state */
em {
    color: var(--color-secondary);
}

/* Modal / Dialog */
.modal-backdrop {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.5);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 1000;
}

.modal {
    background: var(--color-surface);
    border-radius: var(--radius-md);
    padding: var(--spacing-lg);
    min-width: 400px;
    max-width: 90vw;
    max-height: 90vh;
    overflow-y: auto;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.15);
}

.modal-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--spacing-md);
}

.modal-title {
    font-size: var(--font-size-lg);
    font-weight: 500;
}

.modal-close {
    width: 24px;
    height: 24px;
    border: none;
    background: transparent;
    cursor: pointer;
    font-size: 20px;
    color: var(--color-secondary);
}

.modal-close:hover {
    color: var(--color-primary);
}

/* Form group */
.form-group {
    margin-bottom: var(--spacing-md);
}

.form-label {
    display: block;
    font-size: var(--font-size-md);
    color: var(--color-primary);
    margin-bottom: var(--spacing-xs);
}

.form-hint {
    font-size: var(--font-size-sm);
    color: var(--color-secondary);
    margin-top: var(--spacing-xs);
}

/* Table responsive */
@media (max-width: 640px) {
    .table-container {
        margin: 0 -1rem;
        border-radius: 0;
    }
}