/* 
 * OA Prediction System - Smart Health Centre
 * University of East London
 * Color Theme based on SHC Logo
 */

:root {
    /* Primary Colors from Logo */
    --primary-navy: #1B3A5F;
    --primary-navy-dark: #142D4A;
    --primary-navy-light: #2A4A6F;
    
    /* Accent Colors */
    --accent-teal: #2EC4B6;
    --accent-teal-dark: #25A89C;
    --accent-teal-light: #4DD4C8;
    
    /* Supporting Colors */
    --light-blue: #E8F4F8;
    --white: #FFFFFF;
    --gray-100: #F8F9FA;
    --gray-200: #E9ECEF;
    --gray-500: #6C757D;
    --gray-700: #495057;
    --gray-900: #212529;
    
    /* Status Colors */
    --success: #28A745;
    --warning: #FFC107;
    --danger: #DC3545;
    --info: #17A2B8;
}

/* Global Styles */
body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background-color: var(--gray-100);
    color: var(--gray-900);
}

/* Navbar */
.navbar {
    background: linear-gradient(135deg, var(--primary-navy) 0%, var(--primary-navy-dark) 100%) !important;
    box-shadow: 0 2px 10px rgba(27, 58, 95, 0.3);
}

.navbar-brand {
    font-weight: 600;
    font-size: 1.3rem;
}

.navbar-brand img {
    height: 40px;
    margin-right: 10px;
}

.nav-link {
    color: rgba(255, 255, 255, 0.9) !important;
    transition: all 0.3s ease;
    padding: 0.5rem 1rem !important;
    border-radius: 5px;
    margin: 0 2px;
}

.nav-link:hover, .nav-link.active {
    color: white !important;
    background-color: rgba(46, 196, 182, 0.3);
}

/* Login Page */
.login-container {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, var(--primary-navy) 0%, var(--primary-navy-light) 50%, var(--accent-teal) 100%);
    padding: 20px;
}

.login-card {
    background: white;
    border-radius: 20px;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.3);
    width: 100%;
    max-width: 420px;
    overflow: hidden;
}

.login-header {
    background: linear-gradient(135deg, var(--primary-navy) 0%, var(--primary-navy-dark) 100%);
    color: white;
    padding: 40px 30px;
    text-align: center;
}

.login-header .logo {
    width: 100px;
    height: 100px;
    margin: 0 auto 20px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.login-header .logo img {
    max-width: 100%;
    max-height: 100%;
    object-fit: contain;
}

.login-header h1 {
    font-size: 1.5rem;
    font-weight: 600;
    margin-bottom: 5px;
}

.login-header p {
    color: rgba(255, 255, 255, 0.7);
    font-size: 0.9rem;
    margin: 0;
}

.login-body {
    padding: 40px 30px;
}

.login-footer {
    padding: 20px 30px;
    background: var(--gray-100);
    text-align: center;
    border-top: 1px solid var(--gray-200);
}

/* Form Controls */
.form-control {
    border: 2px solid var(--gray-200);
    border-radius: 10px;
    padding: 12px 15px;
    transition: all 0.3s ease;
}

.form-control:focus {
    border-color: var(--accent-teal);
    box-shadow: 0 0 0 3px rgba(46, 196, 182, 0.2);
}

.form-label {
    color: var(--gray-700);
    font-weight: 500;
    margin-bottom: 8px;
}

/* Buttons */
.btn-primary {
    background: linear-gradient(135deg, var(--accent-teal) 0%, var(--accent-teal-dark) 100%);
    border: none;
    border-radius: 10px;
    padding: 12px 24px;
    font-weight: 600;
    transition: all 0.3s ease;
}

.btn-primary:hover {
    background: linear-gradient(135deg, var(--accent-teal-dark) 0%, var(--primary-navy) 100%);
    transform: translateY(-2px);
    box-shadow: 0 5px 20px rgba(46, 196, 182, 0.4);
}

.btn-navy {
    background: linear-gradient(135deg, var(--primary-navy) 0%, var(--primary-navy-dark) 100%);
    border: none;
    color: white;
    border-radius: 10px;
    padding: 12px 24px;
    font-weight: 600;
}

.btn-navy:hover {
    background: linear-gradient(135deg, var(--primary-navy-dark) 0%, var(--primary-navy) 100%);
    color: white;
}

/* Cards */
.card {
    border: none;
    border-radius: 15px;
    box-shadow: 0 5px 20px rgba(0, 0, 0, 0.08);
    transition: all 0.3s ease;
}

.card:hover {
    box-shadow: 0 8px 30px rgba(0, 0, 0, 0.12);
}

.card-header {
    background: white;
    border-bottom: 2px solid var(--gray-100);
    padding: 20px;
    font-weight: 600;
    color: var(--primary-navy);
}

.card-body {
    padding: 25px;
}

/* Stats Cards */
.stats-card {
    border-radius: 15px;
    overflow: hidden;
}

.stats-card.bg-primary {
    background: linear-gradient(135deg, var(--primary-navy) 0%, var(--primary-navy-light) 100%) !important;
}

.stats-card.bg-success {
    background: linear-gradient(135deg, #28A745 0%, #20913C 100%) !important;
}

.stats-card.bg-warning {
    background: linear-gradient(135deg, #FFC107 0%, #E0A800 100%) !important;
}

.stats-card.bg-danger {
    background: linear-gradient(135deg, #DC3545 0%, #C82333 100%) !important;
}

.stats-card .card-body {
    padding: 25px;
}

.stats-card h2 {
    font-size: 2.5rem;
    font-weight: 700;
}

/* Tables */
.table {
    margin-bottom: 0;
}

.table thead th {
    background: var(--primary-navy);
    color: white;
    border: none;
    padding: 15px;
    font-weight: 500;
}

.table tbody td {
    padding: 15px;
    vertical-align: middle;
    border-color: var(--gray-100);
}

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

/* Badges */
.badge {
    padding: 8px 12px;
    border-radius: 20px;
    font-weight: 500;
}

/* Risk Level Colors */
.risk-high { background: var(--danger) !important; }
.risk-medium { background: var(--warning) !important; color: #333 !important; }
.risk-low { background: var(--success) !important; }

/* Form Section Headers */
.section-header {
    background: linear-gradient(135deg, var(--primary-navy) 0%, var(--primary-navy-light) 100%);
    color: white;
    padding: 15px 20px;
    border-radius: 10px;
    margin-bottom: 20px;
}

.section-header h5 {
    margin: 0;
    font-weight: 600;
}

/* Input Groups */
.input-group-text {
    background: var(--light-blue);
    border: 2px solid var(--gray-200);
    border-right: none;
    color: var(--primary-navy);
}

.input-group .form-control {
    border-left: none;
}

/* Result Card */
.result-card {
    border: 3px solid;
    border-radius: 20px;
    padding: 30px;
    text-align: center;
}

.result-card.high-risk {
    border-color: var(--danger);
    background: linear-gradient(135deg, rgba(220, 53, 69, 0.1) 0%, rgba(220, 53, 69, 0.05) 100%);
}

.result-card.medium-risk {
    border-color: var(--warning);
    background: linear-gradient(135deg, rgba(255, 193, 7, 0.1) 0%, rgba(255, 193, 7, 0.05) 100%);
}

.result-card.low-risk {
    border-color: var(--success);
    background: linear-gradient(135deg, rgba(40, 167, 69, 0.1) 0%, rgba(40, 167, 69, 0.05) 100%);
}

.result-icon {
    font-size: 4rem;
    margin-bottom: 20px;
}

.result-probability {
    font-size: 3rem;
    font-weight: 700;
    color: var(--primary-navy);
}

/* Alerts */
.alert {
    border: none;
    border-radius: 10px;
    padding: 15px 20px;
}

/* Page Headers */
.page-header {
    margin-bottom: 30px;
}

.page-header h2 {
    color: var(--primary-navy);
    font-weight: 600;
}

/* Responsive */
@media (max-width: 768px) {
    .login-card {
        margin: 10px;
    }
    
    .login-header {
        padding: 30px 20px;
    }
    
    .login-body {
        padding: 30px 20px;
    }
    
    .stats-card h2 {
        font-size: 2rem;
    }
}

/* Loading Spinner */
.loading-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(27, 58, 95, 0.9);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 9999;
}

.loading-spinner {
    width: 60px;
    height: 60px;
    border: 4px solid rgba(255, 255, 255, 0.3);
    border-top-color: var(--accent-teal);
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

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

/* Feature Input Cards */
.feature-card {
    background: white;
    border-radius: 10px;
    padding: 15px;
    margin-bottom: 15px;
    border-left: 4px solid var(--accent-teal);
}

.feature-card label {
    color: var(--primary-navy);
    font-weight: 500;
}

/* Tooltips */
[data-tooltip] {
    position: relative;
    cursor: help;
}

[data-tooltip]:hover::after {
    content: attr(data-tooltip);
    position: absolute;
    bottom: 100%;
    left: 50%;
    transform: translateX(-50%);
    background: var(--primary-navy);
    color: white;
    padding: 8px 12px;
    border-radius: 5px;
    font-size: 0.85rem;
    white-space: nowrap;
    z-index: 100;
}