:root {
    --brand-primary: #0d606f;
    --brand-accent: #f28d77;
    --brand-bg: #fdfcfb;
    --brand-success: #2d6a4f;
    --brand-muted: #6c757d;
    --brand-card-shadow: 0 0.125rem 0.25rem rgba(0, 0, 0, 0.075);
}

/* Global Styles */
body {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    background-color: var(--brand-bg);
    color: #212529;
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
}

main {
    flex: 1;
}

h1, h2, h3, h4, h5, h6 {
    font-weight: 700;
    letter-spacing: -0.01em;
}

/* Bootstrap Overrides */
.btn-primary {
    background-color: var(--brand-primary);
    border-color: var(--brand-primary);
}

.btn-primary:hover, .btn-primary:focus {
    background-color: #0a4d59;
    border-color: #0a4d59;
}

.btn-outline-primary {
    color: var(--brand-primary);
    border-color: var(--brand-primary);
}

.btn-outline-primary:hover {
    background-color: var(--brand-primary);
    border-color: var(--brand-primary);
}

.text-primary {
    color: var(--brand-primary) !important;
}

.bg-primary {
    background-color: var(--brand-primary) !important;
}

.badge.text-bg-primary {
    background-color: var(--brand-primary) !important;
}

.border-primary {
    border-color: var(--brand-primary) !important;
}

.navbar-dark.bg-dark {
    background-color: var(--brand-primary) !important;
}

/* Miller column width */
.miller-column { width: 220px; min-width: 220px; }

/* Sidebar Styling */
.sidebar {
    height: calc(100vh - 150px); /* Adjust based on header/footer height */
    overflow-y: auto;
    border-right: 1px solid #dee2e6;
}

/* Tag Tree Styling */
.tag-tree ul {
    list-style: none;
    padding-left: 1.2rem;
}

.tag-tree > ul {
    padding-left: 0;
}

.tag-tree li {
    margin: 0.25rem 0;
}

.tag-link {
    text-decoration: none;
    color: #212529;
    transition: color 0.2s;
}

.tag-link:hover {
    color: #0d6efd;
    text-decoration: none;
}

.tag-toggle {
    cursor: pointer;
    user-select: none;
    margin-right: 0.25rem;
    color: #6c757d;
    font-size: 0.8em;
    width: 1em;
    display: inline-block;
    text-align: center;
}

.tag-toggle:hover {
    color: #000;
}

/* Scrollbar for sidebar */
.sidebar::-webkit-scrollbar {
    width: 6px;
}

.sidebar::-webkit-scrollbar-track {
    background: #f1f1f1;
}

.sidebar::-webkit-scrollbar-thumb {
    background: #ccc;
    border-radius: 3px;
}

.sidebar::-webkit-scrollbar-thumb:hover {
    background: #aaa;
}

/* Welcome Page Styles */
.hero-section {
    background: radial-gradient(circle at 50% 50%, #fdfcfb 0%, #f8f9fa 100%);
    padding: 6rem 0;
    border-bottom: 1px solid rgba(0,0,0,0.05);
}

.hero-badge {
    background-color: rgba(13, 96, 111, 0.1);
    color: var(--brand-primary);
    font-weight: 600;
    letter-spacing: 0.05em;
    padding: 0.5rem 1.25rem;
    border-radius: 50px;
    display: inline-block;
}

.trust-signal {
    font-size: 0.85rem;
    color: var(--brand-muted);
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
}

.trust-signal i {
    color: var(--brand-success);
}

.stat-card {
    transition: transform 0.2s;
    border: none;
    background: #fff;
    box-shadow: 0 0.125rem 0.25rem rgba(0, 0, 0, 0.075);
}

.stat-card:hover {
    transform: translateY(-5px);
}

.feature-icon {
    font-size: 2.5rem;
    color: var(--brand-primary);
    margin-bottom: 1rem;
    transition: transform 0.3s ease;
}

.starter-card:hover .feature-icon {
    transform: scale(1.1) rotate(-5deg);
}

.starter-card {
    border-top: 4px solid var(--brand-accent) !important;
}

/* Typography & Layout Utilities */
.ls-wide { letter-spacing: 0.05em; }
.x-small { font-size: 0.75rem; }

.impact-card {
    border: none;
    border-top: 4px solid var(--brand-primary);
    box-shadow: var(--brand-card-shadow);
    transition: transform 0.2s, box-shadow 0.2s;
    background-color: #fff;
}

.impact-card:hover {
    transform: translateY(-3px);
    box-shadow: 0 0.5rem 1rem rgba(0, 0, 0, 0.1);
}

.card-accent {
    border-top-color: var(--brand-accent);
}

.bg-accent {
    background-color: var(--brand-accent) !important;
}

.text-accent {
    color: var(--brand-accent) !important;
}

.btn-accent {
    background-color: var(--brand-accent);
    border-color: var(--brand-accent);
    color: #fff;
}

.btn-accent:hover {
    background-color: #e07b65;
    border-color: #e07b65;
    color: #fff;
}

.hover-zoom {
    display: inline-block;
    transition: transform 0.15s;
}

.hover-zoom:hover {
    transform: scale(1.2);
}

.ring {
    outline: 3px solid var(--brand-primary);
    outline-offset: 2px;
}

/* Navigation & IA Styles */
.navbar {
    padding: 0.75rem 1rem;
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
}

.nav-link {
    font-weight: 500;
    transition: color 0.2s;
}

.nav-link.active {
    color: var(--brand-accent) !important;
    font-weight: 700;
    border-bottom: 2px solid var(--brand-accent);
}

.dropdown-item:active {
    background-color: var(--brand-primary);
}

.dropdown-menu {
    border: 0;
    box-shadow: var(--brand-card-shadow);
}

/* Onboarding Card Styles */
.onboarding-card {
    cursor: pointer;
    transition: all 0.2s ease;
    border: 2px solid transparent !important;
    user-select: none;
}

.onboarding-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 0.5rem 1rem rgba(0, 0, 0, 0.1);
    border-color: #dee2e6 !important;
}

.onboarding-card.selected {
    border-color: var(--brand-primary) !important;
    background-color: rgba(13, 96, 111, 0.05);
}

.onboarding-card .emoji {
    font-size: 3rem;
    margin-bottom: 1rem;
    display: block;
}

.onboarding-card .check-icon {
    position: absolute;
    top: 1rem;
    right: 1rem;
    color: var(--brand-primary);
    font-size: 1.5rem;
    opacity: 0;
    transition: opacity 0.2s;
}

.onboarding-card.selected .check-icon {
    opacity: 1;
}