/* ═══════════════════════════════════════════════════════════════════
   ECD AI System — Premium Dark Theme Styles
   Glassmorphism • Gradient Accents • Smooth Animations
   ═══════════════════════════════════════════════════════════════════ */

@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700;800;900&display=swap');

/* ─── CSS Variables ─────────────────────────────────────────────── */
:root {
    --bg-primary: #0b0f19;
    --bg-secondary: #111827;
    --bg-card: rgba(17, 24, 39, 0.8);
    --bg-card-hover: rgba(30, 41, 59, 0.9);
    --bg-glass: rgba(255, 255, 255, 0.04);
    --border-glass: rgba(255, 255, 255, 0.08);
    --border-subtle: rgba(255, 255, 255, 0.06);
    
    --text-primary: #f1f5f9;
    --text-secondary: #94a3b8;
    --text-muted: #64748b;
    
    --accent-blue: #3b82f6;
    --accent-blue-glow: rgba(59, 130, 246, 0.3);
    --accent-purple: #8b5cf6;
    --accent-cyan: #06b6d4;
    
    --risk-high: #ef4444;
    --risk-high-bg: rgba(239, 68, 68, 0.12);
    --risk-medium: #f59e0b;
    --risk-medium-bg: rgba(245, 158, 11, 0.12);
    --risk-low: #22c55e;
    --risk-low-bg: rgba(34, 197, 94, 0.12);
    
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 16px;
    --radius-xl: 20px;
    
    --shadow-sm: 0 2px 8px rgba(0,0,0,0.2);
    --shadow-md: 0 4px 16px rgba(0,0,0,0.3);
    --shadow-lg: 0 8px 32px rgba(0,0,0,0.4);
    --shadow-glow: 0 0 40px rgba(59, 130, 246, 0.15);
    
    --sidebar-width: 260px;
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

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

html { font-size: 15px; scroll-behavior: smooth; }

body {
    font-family: 'Inter', -apple-system, sans-serif;
    background: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.6;
    min-height: 100vh;
    overflow-x: hidden;
}

body::before {
    content: '';
    position: fixed;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: radial-gradient(circle at 20% 20%, rgba(59,130,246,0.06) 0%, transparent 50%),
                radial-gradient(circle at 80% 80%, rgba(139,92,246,0.04) 0%, transparent 50%);
    z-index: -1;
    animation: bgShift 20s ease infinite alternate;
}

@keyframes bgShift {
    0% { transform: translate(0, 0); }
    100% { transform: translate(-5%, -5%); }
}

a { color: var(--accent-blue); text-decoration: none; transition: var(--transition); }
a:hover { color: var(--accent-cyan); }

/* ─── Layout ────────────────────────────────────────────────────── */
.app-container { display: flex; min-height: 100vh; }

.sidebar {
    width: var(--sidebar-width);
    background: linear-gradient(180deg, #0f172a 0%, #1e1b4b 100%);
    border-right: 1px solid var(--border-glass);
    padding: 0;
    position: fixed;
    top: 0;
    left: 0;
    height: 100vh;
    z-index: 100;
    display: flex;
    flex-direction: column;
    backdrop-filter: blur(20px);
    overflow-y: auto;
}

.sidebar-brand {
    padding: 1.5rem 1.25rem;
    border-bottom: 1px solid var(--border-glass);
}

.sidebar-brand h2 {
    font-size: 1.15rem;
    font-weight: 800;
    background: linear-gradient(135deg, #60a5fa, #a78bfa);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    letter-spacing: -0.5px;
}

.sidebar-brand p {
    font-size: 0.7rem;
    color: var(--text-muted);
    margin-top: 4px;
    font-weight: 400;
}

.sidebar-nav { padding: 1rem 0.75rem; flex: 1; }

.nav-item {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 0.75rem 1rem;
    border-radius: var(--radius-md);
    color: var(--text-secondary);
    font-size: 0.88rem;
    font-weight: 500;
    transition: var(--transition);
    margin-bottom: 4px;
    text-decoration: none;
}

.nav-item:hover {
    background: var(--bg-glass);
    color: var(--text-primary);
    transform: translateX(4px);
}

.nav-item.active {
    background: linear-gradient(135deg, rgba(59,130,246,0.15), rgba(139,92,246,0.1));
    color: #93c5fd;
    border: 1px solid rgba(59,130,246,0.2);
    box-shadow: 0 0 20px rgba(59,130,246,0.1);
}

.nav-item .nav-icon { font-size: 1.15rem; width: 24px; text-align: center; }

.sidebar-footer {
    padding: 1rem 1.25rem;
    border-top: 1px solid var(--border-glass);
    font-size: 0.7rem;
    color: var(--text-muted);
    text-align: center;
}

.main-content {
    margin-left: var(--sidebar-width);
    flex: 1;
    padding: 2rem 2.5rem;
    min-height: 100vh;
}

/* ─── Page Header ───────────────────────────────────────────────── */
.page-header {
    background: linear-gradient(135deg, rgba(59,130,246,0.1), rgba(139,92,246,0.05));
    border: 1px solid var(--border-glass);
    border-radius: var(--radius-xl);
    padding: 2rem 2.5rem;
    margin-bottom: 2rem;
    backdrop-filter: blur(10px);
    position: relative;
    overflow: hidden;
}

.page-header::after {
    content: '';
    position: absolute;
    top: 0;
    right: 0;
    width: 300px;
    height: 100%;
    background: linear-gradient(135deg, transparent, rgba(59,130,246,0.08));
    border-radius: 0 var(--radius-xl) var(--radius-xl) 0;
}

.page-header h1 {
    font-size: 1.75rem;
    font-weight: 800;
    letter-spacing: -0.5px;
    margin-bottom: 0.5rem;
}

.page-header p {
    color: var(--text-secondary);
    font-size: 0.9rem;
    font-weight: 400;
}

/* ─── Metric Cards ──────────────────────────────────────────────── */
.metrics-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 1.25rem;
    margin-bottom: 2rem;
}

.metric-card {
    background: var(--bg-card);
    border: 1px solid var(--border-glass);
    border-radius: var(--radius-lg);
    padding: 1.5rem;
    backdrop-filter: blur(10px);
    transition: var(--transition);
    position: relative;
    overflow: hidden;
}

.metric-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-glow);
    border-color: rgba(59,130,246,0.2);
}

.metric-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: linear-gradient(90deg, var(--accent-blue), var(--accent-purple));
    border-radius: var(--radius-lg) var(--radius-lg) 0 0;
}

.metric-card.risk-high::before { background: var(--risk-high); }
.metric-card.risk-medium::before { background: var(--risk-medium); }
.metric-card.risk-low::before { background: var(--risk-low); }

.metric-label {
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 1px;
    color: var(--text-muted);
    font-weight: 600;
    margin-bottom: 0.5rem;
}

.metric-value {
    font-size: 2.25rem;
    font-weight: 900;
    letter-spacing: -1px;
    line-height: 1.1;
}

.metric-value.text-high { color: var(--risk-high); }
.metric-value.text-medium { color: var(--risk-medium); }
.metric-value.text-low { color: var(--risk-low); }
.metric-value.text-blue { color: var(--accent-blue); }

.metric-sub {
    font-size: 0.8rem;
    color: var(--text-muted);
    margin-top: 0.25rem;
}

/* ─── Cards ─────────────────────────────────────────────────────── */
.card {
    background: var(--bg-card);
    border: 1px solid var(--border-glass);
    border-radius: var(--radius-lg);
    padding: 1.5rem;
    backdrop-filter: blur(10px);
    transition: var(--transition);
    margin-bottom: 1.5rem;
}

.card:hover { border-color: rgba(255,255,255,0.1); }

.card-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 1.25rem;
    padding-bottom: 1rem;
    border-bottom: 1px solid var(--border-subtle);
}

.card-title {
    font-size: 1rem;
    font-weight: 700;
    display: flex;
    align-items: center;
    gap: 8px;
}

.card-body { }

/* ─── Grid Layouts ──────────────────────────────────────────────── */
.grid-2 { display: grid; grid-template-columns: 1fr 1fr; gap: 1.5rem; }
.grid-3 { display: grid; grid-template-columns: 1fr 1fr 1fr; gap: 1.25rem; }
.grid-4 { display: grid; grid-template-columns: repeat(4, 1fr); gap: 1rem; }

/* ─── Tables ────────────────────────────────────────────────────── */
.data-table {
    width: 100%;
    border-collapse: separate;
    border-spacing: 0;
    font-size: 0.85rem;
}

.data-table thead th {
    background: rgba(59,130,246,0.08);
    color: var(--text-secondary);
    font-weight: 600;
    text-transform: uppercase;
    font-size: 0.72rem;
    letter-spacing: 0.5px;
    padding: 0.85rem 1rem;
    text-align: left;
    border-bottom: 1px solid var(--border-glass);
    position: sticky;
    top: 0;
}

.data-table thead th:first-child { border-radius: var(--radius-sm) 0 0 0; }
.data-table thead th:last-child { border-radius: 0 var(--radius-sm) 0 0; }

.data-table tbody tr {
    transition: var(--transition);
    cursor: pointer;
}

.data-table tbody tr:hover { background: var(--bg-glass); }

.data-table td {
    padding: 0.75rem 1rem;
    border-bottom: 1px solid var(--border-subtle);
    color: var(--text-primary);
}

/* ─── Badges ────────────────────────────────────────────────────── */
.badge {
    display: inline-flex;
    align-items: center;
    gap: 4px;
    padding: 3px 10px;
    border-radius: 20px;
    font-size: 0.72rem;
    font-weight: 600;
    letter-spacing: 0.3px;
}

.badge-high { background: var(--risk-high-bg); color: var(--risk-high); }
.badge-medium { background: var(--risk-medium-bg); color: var(--risk-medium); }
.badge-low { background: var(--risk-low-bg); color: var(--risk-low); }
.badge-blue { background: rgba(59,130,246,0.12); color: var(--accent-blue); }

/* ─── Buttons ───────────────────────────────────────────────────── */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 0.6rem 1.25rem;
    border-radius: var(--radius-sm);
    font-size: 0.85rem;
    font-weight: 600;
    border: none;
    cursor: pointer;
    transition: var(--transition);
    font-family: 'Inter', sans-serif;
}

.btn-primary {
    background: linear-gradient(135deg, var(--accent-blue), var(--accent-purple));
    color: white;
    box-shadow: 0 4px 16px rgba(59,130,246,0.3);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 24px rgba(59,130,246,0.4);
}

.btn-outline {
    background: transparent;
    border: 1px solid var(--border-glass);
    color: var(--text-secondary);
}

.btn-outline:hover {
    background: var(--bg-glass);
    border-color: var(--accent-blue);
    color: var(--accent-blue);
}

.btn-sm { padding: 0.4rem 0.85rem; font-size: 0.78rem; }

/* ─── Form Elements ─────────────────────────────────────────────── */
.form-group { margin-bottom: 1rem; }

.form-label {
    display: block;
    font-size: 0.78rem;
    font-weight: 600;
    color: var(--text-secondary);
    margin-bottom: 0.4rem;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.form-input, .form-select {
    width: 100%;
    padding: 0.65rem 0.85rem;
    background: var(--bg-secondary);
    border: 1px solid var(--border-glass);
    border-radius: var(--radius-sm);
    color: var(--text-primary);
    font-size: 0.88rem;
    font-family: 'Inter', sans-serif;
    transition: var(--transition);
    outline: none;
}

.form-input:focus, .form-select:focus {
    border-color: var(--accent-blue);
    box-shadow: 0 0 0 3px var(--accent-blue-glow);
}

.form-select { appearance: none; cursor: pointer; }

.filter-bar {
    display: flex;
    gap: 1rem;
    flex-wrap: wrap;
    align-items: flex-end;
    margin-bottom: 1.5rem;
}

.filter-bar .form-group { margin-bottom: 0; flex: 1; min-width: 150px; }

/* ─── Profile Card ──────────────────────────────────────────────── */
.profile-card {
    background: var(--bg-card);
    border: 1px solid var(--border-glass);
    border-radius: var(--radius-xl);
    overflow: hidden;
}

.profile-header {
    padding: 1.5rem 2rem;
    display: flex;
    align-items: center;
    gap: 1.5rem;
    border-bottom: 1px solid var(--border-subtle);
}

.profile-header.risk-high-border { border-left: 4px solid var(--risk-high); }
.profile-header.risk-medium-border { border-left: 4px solid var(--risk-medium); }
.profile-header.risk-low-border { border-left: 4px solid var(--risk-low); }

.profile-avatar {
    width: 56px;
    height: 56px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    background: linear-gradient(135deg, var(--accent-blue), var(--accent-purple));
}

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

/* ─── Intervention Cards ────────────────────────────────────────── */
.intervention-domain {
    background: var(--bg-glass);
    border: 1px solid var(--border-glass);
    border-radius: var(--radius-lg);
    padding: 1.25rem;
    margin-bottom: 1rem;
}

.intervention-domain-header {
    display: flex;
    align-items: center;
    gap: 10px;
    margin-bottom: 1rem;
    font-weight: 700;
    font-size: 1rem;
}

.activity-item {
    background: var(--bg-secondary);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-md);
    padding: 1rem 1.25rem;
    margin-bottom: 0.75rem;
    transition: var(--transition);
}

.activity-item:hover {
    border-color: var(--accent-blue);
    background: rgba(59,130,246,0.03);
}

.activity-name {
    font-weight: 700;
    font-size: 0.9rem;
    margin-bottom: 0.4rem;
    color: var(--accent-cyan);
}

.activity-desc { font-size: 0.85rem; color: var(--text-secondary); margin-bottom: 0.5rem; }

.activity-meta {
    display: flex;
    gap: 1rem;
    font-size: 0.75rem;
    color: var(--text-muted);
}

/* ─── Caregiver Card ────────────────────────────────────────────── */
.caregiver-card-visual {
    background: linear-gradient(135deg, rgba(251,191,36,0.08), rgba(245,158,11,0.04));
    border: 1px solid rgba(251,191,36,0.2);
    border-radius: var(--radius-xl);
    padding: 2rem;
    text-align: center;
}

.status-banner {
    font-size: 1.25rem;
    font-weight: 800;
    padding: 1rem;
    border-radius: var(--radius-md);
    margin: 1rem 0;
}

.status-banner.high { background: var(--risk-high-bg); color: var(--risk-high); }
.status-banner.medium { background: var(--risk-medium-bg); color: var(--risk-medium); }
.status-banner.low { background: var(--risk-low-bg); color: var(--risk-low); }

.nudge-item {
    background: rgba(59,130,246,0.06);
    border: 1px solid rgba(59,130,246,0.15);
    border-radius: var(--radius-md);
    padding: 1rem;
    margin-bottom: 0.5rem;
    font-size: 0.9rem;
}

/* ─── Chart Container ───────────────────────────────────────────── */
.chart-container {
    position: relative;
    height: 320px;
    width: 100%;
}

.chart-container canvas { border-radius: var(--radius-md); }

/* ─── Loading & Animation ───────────────────────────────────────── */
.spinner {
    display: inline-block;
    width: 20px;
    height: 20px;
    border: 2px solid var(--border-glass);
    border-top-color: var(--accent-blue);
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
}

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

.loading-overlay {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(11,15,25,0.7);
    backdrop-filter: blur(5px);
    z-index: 1000;
    align-items: center;
    justify-content: center;
    flex-direction: column;
    gap: 1rem;
}

.loading-overlay.active { display: flex; }

.fade-in {
    animation: fadeIn 0.5s ease forwards;
    opacity: 0;
}

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(10px); }
    to { opacity: 1; transform: translateY(0); }
}

.slide-in {
    animation: slideIn 0.4s ease forwards;
}

@keyframes slideIn {
    from { opacity: 0; transform: translateX(-20px); }
    to { opacity: 1; transform: translateX(0); }
}

/* ─── Alert Boxes ───────────────────────────────────────────────── */
.alert {
    padding: 1rem 1.25rem;
    border-radius: var(--radius-md);
    margin-bottom: 1rem;
    font-size: 0.88rem;
    display: flex;
    align-items: flex-start;
    gap: 10px;
}

.alert-danger {
    background: var(--risk-high-bg);
    border: 1px solid rgba(239,68,68,0.2);
    color: #fca5a5;
}

.alert-warning {
    background: var(--risk-medium-bg);
    border: 1px solid rgba(245,158,11,0.2);
    color: #fcd34d;
}

.alert-success {
    background: var(--risk-low-bg);
    border: 1px solid rgba(34,197,94,0.2);
    color: #86efac;
}

.alert-info {
    background: rgba(59,130,246,0.08);
    border: 1px solid rgba(59,130,246,0.2);
    color: #93c5fd;
}

/* ─── Tabs ──────────────────────────────────────────────────────── */
.tabs {
    display: flex;
    gap: 4px;
    margin-bottom: 1.5rem;
    border-bottom: 1px solid var(--border-glass);
    padding-bottom: 0;
}

.tab-btn {
    padding: 0.7rem 1.25rem;
    border: none;
    background: none;
    color: var(--text-muted);
    font-size: 0.85rem;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
    border-bottom: 2px solid transparent;
    font-family: 'Inter', sans-serif;
    margin-bottom: -1px;
}

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

.tab-btn.active {
    color: var(--accent-blue);
    border-bottom-color: var(--accent-blue);
}

.tab-content { display: none; }
.tab-content.active { display: block; animation: fadeIn 0.3s ease; }

/* ─── Scrollbar ─────────────────────────────────────────────────── */
::-webkit-scrollbar { width: 6px; height: 6px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: rgba(255,255,255,0.1); border-radius: 3px; }
::-webkit-scrollbar-thumb:hover { background: rgba(255,255,255,0.2); }

/* ─── Empty State ───────────────────────────────────────────────── */
.empty-state {
    text-align: center;
    padding: 3rem;
    color: var(--text-muted);
}

.empty-state .icon { font-size: 3rem; margin-bottom: 1rem; }

/* ─── Responsive ────────────────────────────────────────────────── */
@media (max-width: 1024px) {
    .grid-2 { grid-template-columns: 1fr; }
    .grid-3 { grid-template-columns: 1fr 1fr; }
    .grid-4 { grid-template-columns: 1fr 1fr; }
    .metrics-grid { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 768px) {
    .sidebar { transform: translateX(-100%); }
    .main-content { margin-left: 0; padding: 1rem; }
    .grid-3 { grid-template-columns: 1fr; }
    .metrics-grid { grid-template-columns: 1fr; }
    .filter-bar { flex-direction: column; }
}