/* DISCHEM ESG & GHG Emissions Calculator - Professional Healthcare Design */

:root {
    --dis-chem-green: #128B3A;
    --dis-chem-green-dark: #0e6b2d;
    --dis-chem-green-light: #16a547;
    --dis-chem-yellow: #EEE91B;
    --dis-chem-yellow-dark: #d4d018;
    --dis-chem-dark: #231F20;
    --dis-chem-gray: #6c757d;
    --dis-chem-gray-light: #BBBDBF;
    --dis-chem-light-gray: #F5F5F5;
    --text-dark: #2c3e50;
    --text-muted: #6c757d;
    --border-color: #dee2e6;
    --background: #f8f9fa;
    --success: #28a745;
    --warning: #ffc107;
    --danger: #dc3545;
    --info: #17a2b8;
    --shadow-sm: 0 0.125rem 0.25rem rgba(0,0,0,0.075);
    --shadow-md: 0 0.5rem 1rem rgba(0,0,0,0.15);
    --shadow-lg: 0 1rem 3rem rgba(0,0,0,0.175);
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Roboto', 'Oxygen', 'Ubuntu', 'Cantarell', sans-serif;
    line-height: 1.6;
    color: var(--text-dark);
    background-color: var(--background);
    font-size: 16px;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* Header */
.header {
    background-color: #fff;
    border-bottom: 3px solid var(--dis-chem-green);
    padding: 0.75rem 0;
    position: sticky;
    top: 0;
    z-index: 1000;
    box-shadow: var(--shadow-sm);
    backdrop-filter: blur(10px);
}

.header-content {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo-container {
    display: flex;
    align-items: center;
    gap: 1.25rem;
}

.logo {
    height: 50px;
    transition: transform 0.3s ease;
}

.logo:hover {
    transform: scale(1.05);
}

.app-title {
    color: var(--dis-chem-dark);
    font-size: 1.1rem;
    font-weight: 600;
    letter-spacing: -0.025em;
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: 1.5rem;
    align-items: center;
}

.nav-menu a {
    color: var(--text-dark);
    text-decoration: none;
    font-weight: 500;
    font-size: 0.875rem;
    transition: all 0.3s ease;
    position: relative;
    padding: 0.5rem 0;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.nav-menu a svg {
    flex-shrink: 0;
    transition: transform 0.3s ease;
}

.nav-menu a:hover svg {
    transform: translateY(-2px);
}

.nav-menu a::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background-color: var(--dis-chem-green);
    transition: width 0.3s ease;
}

.nav-menu a:hover {
    color: var(--dis-chem-green);
}

.nav-menu a:hover::after {
    width: 100%;
}

/* Hero Section */
.hero {
    background: linear-gradient(135deg, var(--dis-chem-green) 0%, var(--dis-chem-dark) 100%);
    color: white;
    padding: 4rem 3rem;
    text-align: center;
}

.hero h1 {
    font-size: 2.5rem;
    margin-bottom: 1rem;
}

.hero p {
    font-size: 1.2rem;
    max-width: 800px;
    margin: 0 auto 2rem;
}

@media (max-width: 768px) {
    .hero {
        padding: 3rem 1.5rem;
    }

    .hero h1 {
        font-size: 2rem;
    }
}

.btn {
    display: inline-block;
    background-color: var(--dis-chem-green);
    color: white;
    padding: 0.75rem 1.75rem;
    text-decoration: none;
    border-radius: 8px;
    font-weight: 600;
    font-size: 0.95rem;
    transition: all 0.3s ease;
    border: none;
    cursor: pointer;
    box-shadow: var(--shadow-sm);
    letter-spacing: 0.025em;
}

.btn:hover {
    background-color: var(--dis-chem-green-dark);
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.btn:active {
    transform: translateY(0);
}

.btn-secondary {
    background-color: white;
    color: var(--dis-chem-green);
    border: 2px solid var(--dis-chem-green);
}

.btn-secondary:hover {
    background-color: var(--dis-chem-green);
    color: white;
}

.btn-outline {
    background-color: transparent;
    color: var(--dis-chem-green);
    border: 2px solid var(--dis-chem-green);
}

.btn-outline:hover {
    background-color: var(--dis-chem-green);
    color: white;
}

.btn-success {
    background-color: var(--success);
}

.btn-success:hover {
    background-color: #218838;
}

.btn-sm {
    padding: 0.5rem 1rem;
    font-size: 0.875rem;
}

.btn-lg {
    padding: 1rem 2.5rem;
    font-size: 1.1rem;
}

/* Container */
.container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 2rem 2rem;
}

.content-container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 2rem;
}

@media (max-width: 768px) {
    .container {
        padding: 1.5rem 1.5rem;
    }
}

/* Cards */
.card-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 1.5rem;
    margin-top: 2rem;
}

.card {
    background: white;
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 2rem;
    transition: all 0.3s ease;
    box-shadow: var(--shadow-sm);
}

.card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-md);
    border-color: var(--dis-chem-green);
}

.card h3 {
    color: var(--dis-chem-green);
    margin-bottom: 1rem;
    font-size: 1.25rem;
    font-weight: 600;
    letter-spacing: -0.025em;
}

.card p {
    color: var(--text-muted);
    line-height: 1.7;
}

.card-icon {
    width: 48px;
    height: 48px;
    background: linear-gradient(135deg, var(--dis-chem-green), var(--dis-chem-green-dark));
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 1rem;
    color: white;
    font-size: 1.5rem;
}

/* Forms */
.form-group {
    margin-bottom: 1.5rem;
}

.form-group label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: 600;
    color: var(--text-dark);
    font-size: 0.95rem;
}

.form-control {
    width: 100%;
    padding: 0.75rem 1rem;
    border: 2px solid var(--border-color);
    border-radius: 8px;
    font-size: 1rem;
    transition: all 0.3s ease;
    background-color: white;
}

.form-control:hover {
    border-color: var(--dis-chem-gray-light);
}

.form-control:focus {
    outline: none;
    border-color: var(--dis-chem-green);
    box-shadow: 0 0 0 3px rgba(18, 139, 58, 0.1);
}

.form-control::placeholder {
    color: var(--dis-chem-gray-light);
}

select.form-control {
    cursor: pointer;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 12 12'%3E%3Cpath fill='%23128B3A' d='M6 9L1 4h10z'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 1rem center;
    padding-right: 2.5rem;
}

textarea.form-control {
    min-height: 120px;
    resize: vertical;
}

.form-text {
    display: block;
    margin-top: 0.25rem;
    font-size: 0.875rem;
    color: var(--text-muted);
}

.invalid-feedback {
    display: block;
    margin-top: 0.25rem;
    font-size: 0.875rem;
    color: var(--danger);
}

/* Tables */
.table {
    width: 100%;
    border-collapse: separate;
    border-spacing: 0;
    margin-top: 1rem;
    background: white;
    border-radius: 12px;
    overflow: hidden;
    box-shadow: var(--shadow-sm);
}

.table th,
.table td {
    padding: 1rem 1.25rem;
    text-align: left;
    border-bottom: 1px solid var(--border-color);
}

.table th {
    background: linear-gradient(135deg, var(--dis-chem-dark), #3a3638);
    color: white;
    font-weight: 600;
    font-size: 0.9rem;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.table tbody tr {
    transition: all 0.2s ease;
}

.table tbody tr:hover {
    background-color: rgba(18, 139, 58, 0.03);
    transform: scale(1.01);
}

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

/* Dashboard Stats */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 1.5rem;
    margin: 2rem 0;
}

.stat-card {
    background: white;
    border-left: 4px solid var(--dis-chem-green);
    padding: 1.75rem;
    border-radius: 12px;
    box-shadow: var(--shadow-sm);
    transition: all 0.3s ease;
    position: relative;
    overflow: hidden;
}

.stat-card::before {
    content: '';
    position: absolute;
    top: 0;
    right: 0;
    width: 100px;
    height: 100px;
    background: linear-gradient(135deg, transparent 50%, rgba(18, 139, 58, 0.05) 50%);
    border-radius: 0 12px 0 100%;
}

.stat-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-md);
}

.stat-label {
    font-size: 0.875rem;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.75px;
    font-weight: 600;
}

.stat-value {
    font-size: 2.25rem;
    font-weight: 700;
    color: var(--dis-chem-dark);
    margin-top: 0.75rem;
    letter-spacing: -0.05em;
}

.stat-unit {
    font-size: 1rem;
    color: var(--text-muted);
    margin-left: 0.5rem;
    font-weight: 400;
}

.stat-change {
    display: inline-block;
    margin-top: 0.5rem;
    font-size: 0.875rem;
    padding: 0.25rem 0.5rem;
    border-radius: 4px;
    font-weight: 600;
}

.stat-change.positive {
    color: var(--success);
    background-color: rgba(40, 167, 69, 0.1);
}

.stat-change.negative {
    color: var(--danger);
    background-color: rgba(220, 53, 69, 0.1);
}

/* Alerts */
.alert {
    padding: 1rem 1.25rem;
    border-radius: 8px;
    margin-bottom: 1rem;
    border-left: 4px solid;
    box-shadow: var(--shadow-sm);
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.alert::before {
    font-size: 1.25rem;
    font-weight: bold;
}

.alert-success {
    background-color: rgba(40, 167, 69, 0.1);
    color: #155724;
    border-left-color: var(--success);
}

.alert-success::before {
    content: '✓';
    color: var(--success);
}

.alert-danger {
    background-color: rgba(220, 53, 69, 0.1);
    color: #721c24;
    border-left-color: var(--danger);
}

.alert-danger::before {
    content: '✕';
    color: var(--danger);
}

.alert-warning {
    background-color: rgba(255, 193, 7, 0.1);
    color: #856404;
    border-left-color: var(--warning);
}

.alert-warning::before {
    content: '⚠';
    color: var(--warning);
}

.alert-info {
    background-color: rgba(23, 162, 184, 0.1);
    color: #0c5460;
    border-left-color: var(--info);
}

.alert-info::before {
    content: 'ℹ';
    color: var(--info);
}

/* Footer */
.footer {
    background-color: var(--dis-chem-dark);
    color: white;
    padding: 2rem 0;
    margin-top: 4rem;
    text-align: center;
}

.footer p {
    margin: 0.5rem 0;
}

.footer a {
    color: var(--dis-chem-green);
    text-decoration: none;
}

.footer a:hover {
    text-decoration: underline;
}

.footer .version-info {
    font-size: 0.85rem;
    color: var(--dis-chem-gray-light);
    margin-top: 1rem;
    opacity: 0.8;
}

/* Page Wrapper */
.page-content {
    max-width: 1400px;
    margin: 0 auto;
    padding: 2rem 2rem;
}

@media (max-width: 768px) {
    .page-content {
        padding: 1.5rem 1.5rem;
    }
}

.content-section {
    background: white;
    border-radius: 12px;
    padding: 2rem;
    margin-bottom: 2rem;
    box-shadow: var(--shadow-sm);
}

.section-header {
    margin-bottom: 2rem;
    padding-bottom: 1rem;
    border-bottom: 2px solid var(--border-color);
}

.section-header h2 {
    color: var(--dis-chem-dark);
    font-size: 1.75rem;
    font-weight: 700;
    margin-bottom: 0.5rem;
}

.section-header p {
    color: var(--text-muted);
    font-size: 1rem;
}

/* Utility Classes */
.text-center {
    text-align: center;
}

.mt-1 {
    margin-top: 0.5rem;
}

.mt-2 {
    margin-top: 1rem;
}

.mt-3 {
    margin-top: 1.5rem;
}

.mt-4 {
    margin-top: 2rem;
}

.mb-1 {
    margin-bottom: 0.5rem;
}

.mb-2 {
    margin-bottom: 1rem;
}

.mb-3 {
    margin-bottom: 1.5rem;
}

.mb-4 {
    margin-bottom: 2rem;
}

.mx-auto {
    margin-left: auto;
    margin-right: auto;
}

.text-muted {
    color: var(--text-muted);
}

.text-danger {
    color: var(--dis-chem-green);
}

.text-success {
    color: var(--success);
}

.text-bold {
    font-weight: 600;
}

.d-flex {
    display: flex;
}

.justify-content-between {
    justify-content: space-between;
}

.align-items-center {
    align-items: center;
}

.gap-1 {
    gap: 0.5rem;
}

.gap-2 {
    gap: 1rem;
}

.gap-3 {
    gap: 1.5rem;
}

/* Method Card Selected State */
.method-card.selected {
    border-color: var(--dis-chem-green);
    box-shadow: 0 0 0 3px rgba(18, 139, 58, 0.1), var(--shadow-md);
    background: linear-gradient(to bottom, #fff, #f0fff4);
}

.method-card.selected .method-header h3 {
    color: var(--dis-chem-green);
}

/* Notification Animations */
@keyframes slideIn {
    from {
        transform: translateX(400px);
        opacity: 0;
    }
    to {
        transform: translateX(0);
        opacity: 1;
    }
}

@keyframes slideOut {
    from {
        transform: translateX(0);
        opacity: 1;
    }
    to {
        transform: translateX(400px);
        opacity: 0;
    }
}

/* ESG Navigation Tabs */
.esg-tabs {
    display: flex;
    gap: 1rem;
    margin: 2rem 0;
    padding: 0;
    border-bottom: 2px solid var(--border-color);
    flex-wrap: wrap;
}

.esg-tab {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 1rem 1.5rem;
    text-decoration: none;
    color: var(--text-muted);
    background: transparent;
    border: none;
    border-bottom: 3px solid transparent;
    font-weight: 500;
    font-size: 0.95rem;
    transition: all 0.3s ease;
    cursor: pointer;
    position: relative;
    top: 2px;
}

.esg-tab:hover {
    color: var(--dis-chem-green);
    background-color: rgba(18, 139, 58, 0.05);
}

.esg-tab.active {
    color: var(--dis-chem-green);
    border-bottom-color: var(--dis-chem-green);
    font-weight: 600;
}

.esg-tab .tab-icon {
    font-size: 1.25rem;
    display: flex;
    align-items: center;
    justify-content: center;
}

@media (max-width: 768px) {
    .esg-tabs {
        gap: 0.5rem;
    }

    .esg-tab {
        padding: 0.75rem 1rem;
        font-size: 0.875rem;
    }

    .esg-tab .tab-icon {
        font-size: 1rem;
    }
}