/* i-Screening V1.2 Core Design System */
/* Additive Layer - Native Design System Upgrade */

:root {
    /* 1. Colour Palette (Native iOS translated) */
    --v11-bg-app: #F2F2F7;         /* iOS grouped background (restrained gray) */
    --v11-bg-surface: #FFFFFF;     /* White clinical surface */
    --v11-bg-sidebar: #FFFFFF;     /* White native clinical sidebar */
    --v11-nav-text: #8E8E93;       /* iOS secondary gray */
    --v11-nav-text-active: #000000;/* Active text on light sidebar (if not using blue background) */
    
    --v11-color-primary: #007AFF;  /* Native iOS Blue */
    --v11-color-primary-hover: #0056B3;
    
    /* Text Hierarchy */
    --v11-text-primary: #000000;   /* Pure black primary */
    --v11-text-secondary: #8E8E93; /* iOS secondary gray */
    --v11-text-muted: #C7C7CC;     /* iOS muted gray */
    
    /* Borders */
    --v11-border-light: #E5E5EA;   /* Minimal iOS border */
    --v11-border-medium: #D1D1D6;
    --v11-border-dark: #C7C7CC;
    
    /* Status Colours */
    --v11-color-success: #34C759;  /* Native iOS Green */
    --v11-color-warning: #FF9500;  /* Native iOS Orange */
    --v11-color-danger: #FF3B30;   /* Native iOS Red */
    --v11-color-info: #007AFF;     /* Native iOS Blue */
    
    /* Status Backgrounds (10% opacity equivalent for badges) */
    --v11-bg-success: #E8F8EE;
    --v11-bg-warning: #FFF4E5;
    --v11-bg-danger: #FFEBEA;
    --v11-bg-info: #E5F1FF;
    
    /* Status Text (Darker for contrast) */
    --v11-text-success: #248A3D;
    --v11-text-warning: #B36800;
    --v11-text-danger: #B32922;
    --v11-text-info: #0056B3;

    /* 2. Spacing Scale (8px grid preserved but refined for density) */
    --v11-space-xs: 4px;
    --v11-space-sm: 8px;
    --v11-space-md: 16px;
    --v11-space-lg: 24px;
    --v11-space-xl: 32px;
    --v11-space-2xl: 48px;

    /* 3. Border Radius */
    --v11-radius-sm: 6px;
    --v11-radius-md: 10px;         /* Segmented controls / Cards */
    --v11-radius-lg: 12px;         /* Primary Buttons */
    --v11-radius-full: 9999px;

    /* 4. Shadows & Elevation (Minimal per Native) */
    --v11-shadow-sm: 0 1px 3px rgba(0,0,0, 0.04);
    --v11-shadow-md: 0 4px 12px rgba(0,0,0, 0.06);
    --v11-shadow-lg: 0 10px 20px rgba(0,0,0, 0.08);

    /* 5. Transitions */
    --v11-transition-fast: 150ms ease-in-out;
    --v11-transition-base: 200ms ease-in-out;

    /* 6. Layout Rules (Native + CRM Density) */
    --v11-control-height-sm: 36px; /* Dense CRM actions */
    --v11-control-height-md: 44px; /* Standard CRM inputs/actions (iOS standard tap target) */
    --v11-control-height-lg: 50px; /* VA Tool massive tap targets */
    
    --v11-width-sidebar: 260px;
    --v11-width-content-max: 1200px;
}

/* ==========================================================================
   TYPOGRAPHY HIERARCHY
   ========================================================================== */

/* Font Family implicitly inherits from body, but we explicitly enforce clean rendering */
.v11-typography-base {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

.v11-title-app {
    font-size: 1.25rem; /* 20px */
    font-weight: 700;
    color: var(--v11-nav-text-active);
    letter-spacing: -0.02em;
}

.v11-title-page {
    font-size: 1.5rem; /* 24px */
    font-weight: 700;
    color: var(--v11-text-primary);
    letter-spacing: -0.02em;
    margin: 0;
}

.v11-subtitle-page {
    font-size: 0.875rem; /* 14px */
    font-weight: 400;
    color: var(--v11-text-secondary);
    margin-top: var(--v11-space-xs);
}

.v11-heading-section {
    font-size: 1.125rem; /* 18px */
    font-weight: 600;
    color: var(--v11-text-primary);
    margin: 0;
}

.v11-heading-card {
    font-size: 1rem; /* 16px */
    font-weight: 600;
    color: var(--v11-text-primary);
    margin: 0;
}

.v11-text-body {
    font-size: 0.875rem; /* 14px - standard clinical density */
    font-weight: 400;
    color: var(--v11-text-primary);
    line-height: 1.5;
}

.v11-text-label {
    font-size: 0.8125rem; /* 13px */
    font-weight: 500;
    color: var(--v11-text-secondary);
    margin-bottom: var(--v11-space-xs);
    display: inline-block;
}

.v11-text-helper {
    font-size: 0.75rem; /* 12px */
    font-weight: 400;
    color: var(--v11-text-muted);
}

.v11-text-table {
    font-size: 0.875rem;
    font-weight: 400;
    color: var(--v11-text-primary);
}

.v11-text-kpi {
    font-size: 2rem; /* 32px */
    font-weight: 700;
    color: var(--v11-text-primary);
    letter-spacing: -0.04em;
}

/* ==========================================================================
   UI PRIMITIVES (ADDITIVE ONLY)
   ========================================================================== */

/* Buttons */
.v11-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--v11-space-sm);
    height: var(--v11-control-height-md);
    padding: 0 var(--v11-space-lg); /* Wider padding for iOS feel */
    border-radius: var(--v11-radius-md);
    font-size: 0.95rem; /* Slightly larger, more readable text */
    font-weight: 600; /* iOS buttons are typically semibold */
    cursor: pointer;
    transition: all var(--v11-transition-fast);
    border: 1px solid transparent;
    text-decoration: none;
    -webkit-appearance: none;
    appearance: none;
}

.v11-btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

.v11-btn-lg {
    height: var(--v11-control-height-lg);
    border-radius: var(--v11-radius-lg);
    font-size: 1.05rem;
    padding: 0 var(--v11-space-xl);
}

.v11-btn-primary {
    background-color: var(--v11-color-primary);
    color: #FFFFFF;
    /* Removed box-shadow for cleaner native iOS look */
}
.v11-btn-primary:hover:not(:disabled) {
    background-color: var(--v11-color-primary-hover);
}

.v11-btn-secondary {
    background-color: var(--v11-border-light); /* iOS style gray button */
    color: var(--v11-text-primary);
    border-color: transparent;
}
.v11-btn-secondary:hover:not(:disabled) {
    background-color: var(--v11-border-medium);
}

.v11-btn-danger {
    background-color: var(--v11-bg-danger); /* iOS tinted destructive */
    color: var(--v11-color-danger);
    border-color: transparent;
}
.v11-btn-danger:hover:not(:disabled) {
    background-color: var(--v11-color-danger);
    color: #FFFFFF;
}

.v11-btn-icon {
    width: var(--v11-control-height-md);
    padding: 0;
    color: var(--v11-color-primary); /* iOS uses primary blue for icons */
    background: transparent;
}
.v11-btn-icon:hover:not(:disabled) {
    background-color: var(--v11-border-light);
}

/* Forms */
.v11-input, .v11-select, .v11-textarea {
    width: 100%;
    height: var(--v11-control-height-md);
    padding: 0 var(--v11-space-sm);
    background-color: var(--v11-bg-surface);
    border: 1px solid var(--v11-border-medium);
    border-radius: var(--v11-radius-sm);
    font-size: 0.875rem;
    color: var(--v11-text-primary);
    transition: border-color var(--v11-transition-fast), box-shadow var(--v11-transition-fast);
}

.v11-textarea {
    height: auto;
    padding: var(--v11-space-sm);
    resize: vertical;
}

.v11-input:focus, .v11-select:focus, .v11-textarea:focus {
    outline: none;
    border-color: var(--v11-color-primary);
    box-shadow: 0 0 0 3px rgba(0, 122, 255, 0.15);
}

/* Checkbox & Radio - Additive approach, assumes wrapping label */
.v11-checkbox-label, .v11-radio-label {
    display: inline-flex;
    align-items: center;
    gap: var(--v11-space-sm);
    cursor: pointer;
    font-size: 0.875rem;
    color: var(--v11-text-primary);
}

/* Badges */
.v11-badge {
    display: inline-flex;
    align-items: center;
    padding: 2px 8px;
    border-radius: var(--v11-radius-full);
    font-size: 0.75rem;
    font-weight: 500;
}
.v11-badge-success {
    background-color: var(--v11-bg-success);
    color: var(--v11-text-success);
}
.v11-badge-warning {
    background-color: var(--v11-bg-warning);
    color: var(--v11-text-warning);
}
.v11-badge-danger {
    background-color: var(--v11-bg-danger);
    color: var(--v11-text-danger);
}
.v11-badge-info {
    background-color: var(--v11-bg-info);
    color: var(--v11-text-info);
}

/* Cards */
.v11-card {
    background-color: var(--v11-bg-surface);
    border: 1px solid var(--v11-border-light);
    border-radius: var(--v11-radius-md);
    box-shadow: var(--v11-shadow-sm);
    padding: var(--v11-space-lg);
}

/* Tables */
.v11-table-wrapper {
    width: 100%;
    overflow-x: auto;
    border: 1px solid var(--v11-border-light);
    border-radius: var(--v11-radius-md);
    background-color: var(--v11-bg-surface);
}

.v11-table {
    width: 100%;
    border-collapse: collapse;
    text-align: left;
}

.v11-table th {
    background-color: var(--v11-bg-app);
    padding: var(--v11-space-sm) var(--v11-space-md);
    font-size: 0.75rem;
    font-weight: 600;
    color: var(--v11-text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    border-bottom: 1px solid var(--v11-border-light);
}

.v11-table td {
    padding: var(--v11-space-md);
    font-size: 0.875rem;
    color: var(--v11-text-primary);
    border-bottom: 1px solid var(--v11-border-light);
}

.v11-table tr:last-child td {
    border-bottom: none;
}

/* Tabs */
.v11-tabs-list {
    display: flex;
    border-bottom: 1px solid var(--v11-border-light);
    gap: var(--v11-space-lg);
    margin-bottom: var(--v11-space-lg);
}

.v11-tab-btn {
    background: transparent;
    border: none;
    padding: var(--v11-space-sm) 0;
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--v11-text-secondary);
    cursor: pointer;
    border-bottom: 2px solid transparent;
    transition: all var(--v11-transition-fast);
}

.v11-tab-btn:hover {
    color: var(--v11-text-primary);
}

.v11-tab-btn.active {
    color: var(--v11-color-primary);
    border-bottom-color: var(--v11-color-primary);
}

/* Modals */
.v11-modal-backdrop {
    position: fixed;
    inset: 0;
    background-color: rgba(15, 23, 42, 0.5); /* Slate 900 with opacity */
    backdrop-filter: blur(2px);
    z-index: 9999;
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    transition: opacity var(--v11-transition-base);
}

.v11-modal-surface {
    background-color: var(--v11-bg-surface);
    border-radius: var(--v11-radius-lg);
    box-shadow: var(--v11-shadow-lg);
    width: 100%;
    max-width: 500px;
    padding: var(--v11-space-lg);
    transform: scale(0.95);
    transition: transform var(--v11-transition-base);
}

/* States */
.v11-empty-state {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: var(--v11-space-2xl) var(--v11-space-lg);
    text-align: center;
    background-color: var(--v11-bg-app);
    border: 1px dashed var(--v11-border-medium);
    border-radius: var(--v11-radius-md);
}

.v11-loading-state {
    display: flex;
    align-items: center;
    justify-content: center;
    padding: var(--v11-space-2xl);
    color: var(--v11-text-muted);
}

/* --- Phase 4 Additions --- */

.v11-stat-card {
    display: flex;
    flex-direction: column;
    padding: var(--v11-space-lg);
    background-color: var(--v11-bg-surface);
    border: 1px solid var(--v11-border-light);
    border-radius: var(--v11-radius-md);
    box-shadow: var(--v11-shadow-sm);
}

.v11-stat-card .v11-stat-title {
    font-size: 0.875rem;
    color: var(--v11-text-secondary); /* iOS uses darker secondary text for legibility */
    margin-bottom: var(--v11-space-xs);
    font-weight: 500;
}

.v11-stat-card .v11-stat-value {
    font-size: 1.75rem; /* slightly larger for native feel */
    font-weight: 600;
    color: var(--v11-text-primary);
}

.v11-stat-card.warning {
    border-top: 3px solid var(--v11-color-warning);
}
.v11-stat-card.danger {
    border-top: 3px solid var(--v11-color-danger);
}
.v11-stat-card.success {
    border-top: 3px solid var(--v11-color-success);
}

.v11-detail-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
    gap: var(--v11-space-lg);
}

.v11-detail-grid > div {
    display: flex;
    flex-direction: column;
}

.v11-detail-grid strong {
    font-size: 0.75rem;
    text-transform: uppercase;
    color: var(--v11-text-muted);
    letter-spacing: 0.05em;
    margin-bottom: var(--v11-space-xs);
}

.v11-detail-grid span {
    font-size: 1rem;
    color: var(--v11-text-primary);
}

.v11-detail-grid .full-width {
    grid-column: 1 / -1;
}

.v11-status-badge {
    display: inline-block;
    padding: 2px 8px;
    border-radius: 12px;
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
}
.v11-status-badge.hot {
    background-color: rgba(220, 53, 69, 0.1);
    color: var(--v11-danger);
}
.v11-status-badge.warm {
    background-color: rgba(255, 193, 7, 0.1);
    color: var(--v11-warning);
}
.v11-status-badge.info {
    background-color: rgba(13, 110, 253, 0.1);
    color: var(--v11-primary);
}
.v11-status-badge.closed {
    background-color: rgba(108, 117, 125, 0.1);
    color: var(--v11-text-muted);
}
.v11-status-badge.active {
    background-color: rgba(25, 135, 84, 0.1);
    color: var(--v11-success);
}

.v11-action-bar {
    display: flex;
    gap: var(--v11-space-sm);
    flex-wrap: wrap;
    align-items: center;
}

/* Specific layout for two columns */
.v11-two-col {
    display: flex;
    gap: var(--v11-space-lg);
    flex-wrap: wrap;
}
.v11-two-col > * {
    flex: 1;
    min-width: 300px;
}

/* Phase 5: Form Overrides */
.modern-radio-group, .modern-checkbox-group {
    display: flex;
    flex-wrap: wrap;
    gap: var(--v11-space-sm);
}

.radio-card, .checkbox-card {
    display: inline-flex;
    align-items: center;
    border: 1px solid var(--v11-border-color);
    border-radius: var(--v11-radius-md);
    padding: 10px 16px;
    background: var(--v11-bg-primary);
    cursor: pointer;
    transition: all var(--v11-transition-fast);
    font-size: 0.95rem;
    color: var(--v11-text-primary);
}

.radio-card:hover, .checkbox-card:hover {
    border-color: var(--v11-color-primary);
    background: var(--v11-bg-secondary);
}

.radio-card input:checked + span, .checkbox-card input:checked + span {
    font-weight: 500;
}

.radio-card:has(input:checked), .checkbox-card:has(input:checked) {
    border-color: var(--v11-color-primary);
    background: rgba(0, 122, 255, 0.08); /* iOS light blue tint */
}

.clinical-matrix {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    border: 1px solid var(--v11-border-color);
    border-radius: var(--v11-radius-md);
    overflow: hidden;
    background: var(--v11-bg-primary);
}

.matrix-header {
    background: var(--v11-bg-tertiary);
    padding: var(--v11-space-md);
    font-weight: 600;
    text-align: center;
    border-bottom: 1px solid var(--v11-border-color);
    color: var(--v11-text-primary);
}

.matrix-row {
    display: flex;
    align-items: center;
    padding: var(--v11-space-xs) var(--v11-space-md);
    gap: var(--v11-space-sm);
}

.matrix-row label {
    flex: 0 0 60px;
    font-weight: 500;
    color: var(--v11-text-secondary);
    font-size: 0.9rem;
}

.matrix-row .v11-input, .matrix-row .v11-select {
    flex: 1;
}

.matrix-column:first-child {
    border-right: 1px solid var(--v11-border-color);
}

@media (max-width: 768px) {
    .clinical-matrix {
        grid-template-columns: 1fr;
    }
    .matrix-column:first-child {
        border-right: none;
        border-bottom: 1px solid var(--v11-border-color);
    }
}


/* KPI Grid */
.v11-kpi-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
    gap: var(--v11-space-lg);
}