/* BrainsAI MedTech Executive Dashboard - Enhanced Visual Design */

:root {
    /* Enhanced Color Palette */
    --primary-green: #11301b;
    --secondary-green: #384a42;
    --accent-gold: #aa9b5f;
    --highlight-orange: #db6826;
    --background-light: #ecece0;
    --white: #ffffff;
    --text-muted: #6c757d;
    --success-green: #059669;
    --warning-amber: #f59e0b;
    --info-blue: #3b82f6;
    
    /* Enhanced Shadows */
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
    --shadow-2xl: 0 25px 50px -12px rgba(0, 0, 0, 0.25);
    
    /* Enhanced Radii */
    --radius-sm: 0.375rem;
    --radius-md: 0.5rem;
    --radius-lg: 0.75rem;
    --radius-xl: 1rem;
    --radius-2xl: 1.5rem;
    
    /* Enhanced Gradients */
    --gradient-primary: linear-gradient(135deg, #11301b 0%, #384a42 100%);
    --gradient-gold: linear-gradient(135deg, #aa9b5f 0%, #c4b56d 100%);
    --gradient-orange: linear-gradient(135deg, #db6826 0%, #e67e22 100%);
    --gradient-success: linear-gradient(135deg, #059669 0%, #047857 100%);
    --gradient-surface: linear-gradient(135deg, #ffffff 0%, #fcfcfc 100%);
    --gradient-background: linear-gradient(135deg, #ecece0 0%, #f5f5f0 100%);
}

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

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    background: var(--gradient-background);
    color: var(--primary-green);
    font-weight: 400;
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* Enhanced Navigation */
.navbar {
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid rgba(17, 48, 27, 0.08);
    box-shadow: var(--shadow-sm);
    position: sticky;
    top: 0;
    z-index: 1000;
    transition: all 0.3s ease;
}

.navbar-brand {
    font-weight: 800;
    font-size: 1.25rem;
    color: var(--accent-gold) !important;
    transition: all 0.3s ease;
}

.navbar-brand:hover {
    transform: scale(1.02);
    filter: brightness(1.1);
}

.navbar-nav .nav-link {
    font-weight: 500;
    padding: 0.75rem 1rem !important;
    border-radius: var(--radius-lg);
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    position: relative;
    overflow: hidden;
}

.navbar-nav .nav-link::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: var(--gradient-gold);
    transition: left 0.3s ease;
    z-index: -1;
    opacity: 0.1;
}

.navbar-nav .nav-link:hover::before {
    left: 0;
}

.navbar-nav .nav-link.active {
    background: var(--gradient-primary);
    color: white !important;
    box-shadow: var(--shadow-md);
}

/* Enhanced Executive Cards */
.executive-card {
    background: var(--gradient-surface);
    border-radius: var(--radius-2xl);
    padding: 2.5rem;
    box-shadow: var(--shadow-lg);
    border: 1px solid rgba(17, 48, 27, 0.05);
    transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    position: relative;
    overflow: hidden;
}

.executive-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: var(--gradient-primary);
    transform: scaleX(0);
    transition: transform 0.3s ease;
}

.executive-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-2xl);
    border-color: rgba(17, 48, 27, 0.15);
}

.executive-card:hover::before {
    transform: scaleX(1);
}

/* Enhanced Metric Cards */
.metric-card {
    background: var(--gradient-surface);
    border-radius: var(--radius-xl);
    padding: 2rem;
    box-shadow: var(--shadow-md);
    border: 1px solid rgba(17, 48, 27, 0.05);
    transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    height: 100%;
    position: relative;
    overflow: hidden;
}

.metric-card::after {
    content: '';
    position: absolute;
    top: -50%;
    right: -50%;
    width: 100%;
    height: 200%;
    background: radial-gradient(circle, rgba(17, 48, 27, 0.03) 0%, transparent 70%);
    pointer-events: none;
    transition: all 0.3s ease;
}

.metric-card:hover {
    transform: translateY(-6px) scale(1.02);
    box-shadow: var(--shadow-xl);
}

.metric-card:hover::after {
    top: -25%;
    opacity: 0.8;
}

/* Enhanced Metric Numbers with Animation */
.metric-number {
    font-size: 3rem;
    font-weight: 800;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    display: block;
    margin-bottom: 0.75rem;
    animation: countUp 1.5s ease-out;
}

@keyframes countUp {
    from {
        opacity: 0;
        transform: translateY(20px) scale(0.8);
    }
    to {
        opacity: 1;
        transform: translateY(0) scale(1);
    }
}

/* Enhanced Chart Containers */
.chart-container {
    background: var(--gradient-surface);
    border-radius: var(--radius-xl);
    padding: 2rem;
    box-shadow: var(--shadow-md);
    border: 1px solid rgba(17, 48, 27, 0.05);
    transition: all 0.3s ease;
    position: relative;
    overflow: hidden;
}

.chart-container::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: var(--gradient-gold);
    transform: scaleX(0);
    transition: transform 0.3s ease;
}

.chart-container:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
}

.chart-container:hover::before {
    transform: scaleX(1);
}

/* Enhanced Buttons */
.btn-executive {
    background: var(--gradient-primary);
    color: white;
    border: none;
    padding: 0.875rem 2rem;
    border-radius: var(--radius-lg);
    font-weight: 600;
    font-size: 0.95rem;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    text-decoration: none;
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    position: relative;
    overflow: hidden;
    box-shadow: var(--shadow-md);
}

.btn-executive::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.2), transparent);
    transition: left 0.5s ease;
}

.btn-executive:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
    color: white;
}

.btn-executive:hover::before {
    left: 100%;
}

.btn-executive-outline {
    background: transparent;
    color: var(--primary-green);
    border: 2px solid var(--primary-green);
    padding: 0.75rem 2rem;
    border-radius: var(--radius-lg);
    font-weight: 600;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    text-decoration: none;
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    position: relative;
    overflow: hidden;
}

.btn-executive-outline::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 0;
    height: 100%;
    background: var(--gradient-primary);
    transition: width 0.3s ease;
    z-index: -1;
}

.btn-executive-outline:hover {
    color: white;
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

.btn-executive-outline:hover::before {
    width: 100%;
}

/* Enhanced Badges */
.badge-executive {
    background: var(--gradient-primary);
    color: white;
    padding: 0.5rem 1rem;
    border-radius: 50px;
    font-size: 0.75rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.8px;
    box-shadow: var(--shadow-sm);
    transition: all 0.3s ease;
}

.badge-executive:hover {
    transform: scale(1.05);
    box-shadow: var(--shadow-md);
}

.badge-gold {
    background: var(--gradient-gold);
    color: white;
    padding: 0.5rem 1rem;
    border-radius: 50px;
    font-size: 0.75rem;
    font-weight: 700;
    box-shadow: var(--shadow-sm);
}

.badge-orange {
    background: var(--gradient-orange);
    color: white;
    padding: 0.5rem 1rem;
    border-radius: 50px;
    font-size: 0.75rem;
    font-weight: 700;
    box-shadow: var(--shadow-sm);
}

/* Enhanced Progress Bars */
.progress-executive {
    height: 6px;
    background: rgba(17, 48, 27, 0.1);
    border-radius: var(--radius-sm);
    overflow: hidden;
    position: relative;
}

.progress-executive .progress-bar {
    height: 100%;
    background: var(--gradient-primary);
    border-radius: var(--radius-sm);
    transition: width 1.5s cubic-bezier(0.4, 0, 0.2, 1);
    position: relative;
    overflow: hidden;
}

.progress-executive .progress-bar::after {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.4), transparent);
    animation: progressShimmer 2s infinite;
}

@keyframes progressShimmer {
    0% { left: -100%; }
    100% { left: 100%; }
}

/* Enhanced Chart Titles */
.chart-title {
    color: var(--primary-green);
    font-size: 1.25rem;
    font-weight: 700;
    margin-bottom: 1.5rem;
    display: flex;
    align-items: center;
    gap: 0.75rem;
    position: relative;
}

.chart-title::after {
    content: '';
    flex: 1;
    height: 2px;
    background: linear-gradient(90deg, var(--accent-gold), transparent);
    margin-left: 1rem;
}

.chart-title i {
    color: var(--accent-gold);
    font-size: 1.1rem;
    padding: 0.5rem;
    background: rgba(170, 155, 95, 0.1);
    border-radius: var(--radius-md);
}

/* Enhanced Research Items */
.research-item {
    background: var(--gradient-surface);
    border-radius: var(--radius-2xl);
    padding: 2.5rem;
    margin-bottom: 2rem;
    box-shadow: var(--shadow-lg);
    border: 1px solid rgba(17, 48, 27, 0.05);
    transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    position: relative;
    overflow: hidden;
}

/* Research Detail Page Enhancements */
.research-detail-title {
    font-size: 2.5rem;
    font-weight: 700;
    line-height: 1.2;
    color: var(--primary-green);
    margin-bottom: 2rem;
    text-shadow: 0 2px 4px rgba(0,0,0,0.1);
}

.research-meta-info {
    background: rgba(17, 48, 27, 0.02);
    border-radius: var(--radius-lg);
    padding: 1.5rem;
    margin-bottom: 2rem;
}

.research-abstract {
    font-size: 1.1rem;
    line-height: 1.8;
    color: #495057;
    text-align: justify;
    margin-bottom: 0;
}

.section-header {
    color: var(--primary-green);
    font-weight: 600;
    margin-bottom: 1.5rem;
    display: flex;
    align-items: center;
    gap: 0.75rem;
    font-size: 1.25rem;
}

.section-header i {
    color: var(--accent-gold);
    font-size: 1.1rem;
    padding: 0.5rem;
    background: rgba(170, 155, 95, 0.1);
    border-radius: var(--radius-md);
}

.research-item::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 4px;
    height: 0;
    background: var(--gradient-gold);
    transition: height 0.3s ease;
}

.research-item:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
}

.research-item:hover::before {
    height: 100%;
}

/* Enhanced Activity Feed */
.activity-feed .activity-item {
    background: var(--gradient-surface);
    border-radius: var(--radius-lg);
    padding: 1.5rem;
    margin-bottom: 1rem;
    border: 1px solid rgba(17, 48, 27, 0.05);
    transition: all 0.3s ease;
    position: relative;
}

.activity-item:hover {
    transform: translateX(8px);
    box-shadow: var(--shadow-md);
    border-color: var(--accent-gold);
}

/* Enhanced KPI Grid */
.kpi-item {
    background: var(--gradient-surface);
    border-radius: var(--radius-lg);
    padding: 1.5rem;
    margin-bottom: 1rem;
    border: 1px solid rgba(17, 48, 27, 0.05);
    transition: all 0.3s ease;
    position: relative;
    overflow: hidden;
}

.kpi-item::before {
    content: '';
    position: absolute;
    top: 0;
    right: 0;
    width: 0;
    height: 100%;
    background: linear-gradient(180deg, var(--accent-gold), transparent);
    opacity: 0.1;
    transition: width 0.3s ease;
}

.kpi-item:hover::before {
    width: 100%;
}

/* Enhanced Forms */
.form-control, .form-select {
    border: 2px solid rgba(17, 48, 27, 0.1);
    border-radius: var(--radius-lg);
    padding: 1rem 1.25rem;
    font-size: 0.95rem;
    transition: all 0.3s ease;
    background: var(--gradient-surface);
}

.form-control:focus, .form-select:focus {
    border-color: var(--accent-gold);
    box-shadow: 0 0 0 0.2rem rgba(170, 155, 95, 0.15);
    transform: translateY(-1px);
}

/* Enhanced Tables */
.table {
    background: var(--gradient-surface);
    border-radius: var(--radius-xl);
    overflow: hidden;
    box-shadow: var(--shadow-md);
    border: none;
}

.table th {
    background: var(--gradient-primary);
    color: white;
    border: none;
    padding: 1.25rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    font-size: 0.875rem;
}

.table td {
    padding: 1.25rem;
    border-color: rgba(17, 48, 27, 0.05);
    transition: all 0.3s ease;
}

.table tbody tr:hover {
    background: rgba(17, 48, 27, 0.02);
    transform: scale(1.01);
}

/* Enhanced Loading States */
.loading-skeleton {
    background: linear-gradient(90deg, #f0f0f0 25%, #e0e0e0 50%, #f0f0f0 75%);
    background-size: 200% 100%;
    animation: loadingShimmer 1.5s infinite;
    border-radius: var(--radius-md);
}

@keyframes loadingShimmer {
    0% { background-position: -200% 0; }
    100% { background-position: 200% 0; }
}

/* Enhanced Responsive Design */
@media (max-width: 768px) {
    .executive-card {
        padding: 1.5rem;
    }
    
    .metric-card {
        padding: 1.25rem;
        margin-bottom: 1rem;
    }
    
    .metric-number {
        font-size: 2.25rem;
    }
    
    .chart-container {
        padding: 1.25rem;
    }
}

/* Enhanced Animation Classes */
.fade-in-up {
    animation: fadeInUp 0.8s cubic-bezier(0.4, 0, 0.2, 1) forwards;
}

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.stagger-animation {
    animation-delay: calc(var(--stagger-delay, 0) * 0.1s);
}

/* Enhanced Focus States */
*:focus {
    outline: 2px solid var(--accent-gold);
    outline-offset: 2px;
}

/* Enhanced Scrollbar */
::-webkit-scrollbar {
    width: 8px;
}

::-webkit-scrollbar-track {
    background: rgba(17, 48, 27, 0.05);
    border-radius: var(--radius-sm);
}

::-webkit-scrollbar-thumb {
    background: var(--gradient-primary);
    border-radius: var(--radius-sm);
}

::-webkit-scrollbar-thumb:hover {
    background: var(--gradient-gold);
}