:root {
    color-scheme: light;
    --color-ink: #24352c;
    --color-muted: #65736a;
    --color-brand: #315e43;
    --color-brand-dark: #244a34;
    --color-brand-soft: #e9f0e8;
    --color-page: #f4f7f2;
    --color-surface: #ffffff;
    --color-border: #dce5da;
    --shadow-soft: 0 12px 32px rgba(36, 53, 44, 0.07);
}

body {
    display: flex;
    min-height: 100vh;
    flex-direction: column;
    background: var(--color-page);
    color: var(--color-ink);
    font-family: system-ui, -apple-system, "Segoe UI", sans-serif;
    line-height: 1.6;
}

a {
    color: var(--color-brand);
}

a:hover {
    color: var(--color-brand-dark);
}

.skip-link {
    position: absolute;
    z-index: 1100;
    top: 0.75rem;
    left: 0.75rem;
    padding: 0.65rem 0.9rem;
    transform: translateY(-180%);
    border-radius: 0.5rem;
    background: var(--color-surface);
    color: var(--color-ink);
    box-shadow: var(--shadow-soft);
}

.skip-link:focus {
    transform: translateY(0);
}

.site-header {
    border-bottom: 1px solid var(--color-border);
    background: rgba(255, 255, 255, 0.94);
}

.navbar {
    min-height: 4.5rem;
}

.navbar-brand {
    color: var(--color-brand-dark);
    font-size: 1.25rem;
    font-weight: 750;
    letter-spacing: -0.035em;
}

.navbar-brand:hover {
    color: var(--color-brand);
}

.navbar-nav {
    gap: 0.35rem;
}

.navbar .nav-link {
    padding: 0.55rem 0.9rem;
    border-radius: 999px;
    color: var(--color-muted);
    font-size: 0.95rem;
    font-weight: 600;
}

.navbar .nav-link:hover,
.navbar .nav-link:focus-visible {
    background: var(--color-brand-soft);
    color: var(--color-brand-dark);
}

.navbar .nav-link.active {
    background: var(--color-brand);
    color: #ffffff;
}

.navbar-toggler {
    border-color: var(--color-border);
}

.navbar-toggler:focus {
    box-shadow: 0 0 0 0.2rem rgba(49, 94, 67, 0.2);
}

.page-shell {
    flex: 1;
    padding-top: clamp(2.25rem, 5vw, 4rem);
    padding-bottom: clamp(3rem, 7vw, 5.5rem);
}

.page-intro {
    max-width: 48rem;
    margin-bottom: 2rem;
}

.eyebrow {
    margin-bottom: 0.45rem;
    color: var(--color-brand);
    font-size: 0.78rem;
    font-weight: 750;
    letter-spacing: 0.12em;
    text-transform: uppercase;
}

.page-intro h1 {
    margin-bottom: 0.6rem;
    color: var(--color-ink);
    font-size: clamp(2rem, 5vw, 2.8rem);
    font-weight: 750;
    letter-spacing: -0.045em;
}

.page-description {
    margin-bottom: 0;
    color: var(--color-muted);
    font-size: 1.05rem;
}

.placeholder-panel {
    padding: clamp(1.4rem, 4vw, 2.25rem);
    border: 1px solid var(--color-border);
    border-radius: 1rem;
    background: var(--color-surface);
    box-shadow: var(--shadow-soft);
}

.placeholder-panel h2 {
    margin-bottom: 0.5rem;
    font-size: 1.2rem;
    font-weight: 700;
}

.placeholder-panel p {
    max-width: 42rem;
    margin-bottom: 0;
    color: var(--color-muted);
}

.dashboard-section + .dashboard-section {
    margin-top: 2.5rem;
}

.section-heading {
    margin-bottom: 1rem;
    font-size: 1.25rem;
    font-weight: 700;
    letter-spacing: -0.02em;
}

.dashboard-card {
    padding: 1.35rem;
    border: 1px solid var(--color-border);
    border-radius: 1rem;
    background: var(--color-surface);
    box-shadow: var(--shadow-soft);
}

.summary-card {
    min-height: 9rem;
}

.card-label {
    margin-bottom: 1rem;
    color: var(--color-muted);
    font-size: 0.95rem;
    font-weight: 650;
}

.summary-value {
    margin: 0;
    color: var(--color-brand-dark);
    font-size: 2rem;
    font-weight: 750;
    line-height: 1.1;
}

.threshold-list {
    display: grid;
    gap: 0.45rem;
    padding: 0;
    list-style: none;
    font-size: 0.9rem;
}

.threshold-list li {
    display: flex;
    justify-content: space-between;
    gap: 0.75rem;
}

.threshold-list strong {
    color: var(--color-ink);
    font-weight: 650;
}

.threshold-list span {
    color: var(--color-muted);
    text-align: right;
}

.demo-note {
    margin: 0.9rem 0 0;
    color: var(--color-muted);
    font-size: 0.9rem;
}

.zone-title {
    display: flex;
    flex-wrap: wrap;
    align-items: baseline;
    gap: 0.5rem;
    margin-bottom: 1.5rem;
    font-size: 1.1rem;
    font-weight: 750;
}

.zone-title span {
    color: var(--color-muted);
    font-size: 0.95rem;
    font-weight: 500;
}

.empty-zone {
    padding: 0.85rem 1rem;
    border-radius: 0.7rem;
    background: var(--color-brand-soft);
    color: var(--color-brand-dark);
    font-weight: 600;
}

.history-table-container {
    min-width: 0;
    overflow-x: auto;
    border: 1px solid var(--color-border);
    border-radius: 1rem;
    background: var(--color-surface);
    box-shadow: var(--shadow-soft);
}

.history-table-container .table {
    min-width: 58rem;
    --bs-table-bg: var(--color-surface);
    --bs-table-color: var(--color-ink);
    --bs-table-hover-bg: var(--color-brand-soft);
}

.history-table-container th {
    color: var(--color-brand-dark);
    font-size: 0.9rem;
    white-space: nowrap;
}

.history-empty-state {
    padding: clamp(1.5rem, 4vw, 2.25rem);
    border: 1px solid var(--color-border);
    border-radius: 1rem;
    background: var(--color-surface);
    color: var(--color-muted);
    text-align: center;
}

.history-table-container .history-empty-state {
    padding: 1.5rem 1rem;
    border: 0;
    border-radius: 0;
    background: transparent;
    box-shadow: none;
}

.history-empty-state h3 {
    margin-bottom: 0.5rem;
    color: var(--color-ink);
    font-size: 1.1rem;
    font-weight: 700;
}

.site-footer {
    padding: 1.25rem 0;
    border-top: 1px solid var(--color-border);
    background: var(--color-surface);
    color: var(--color-muted);
    font-size: 0.9rem;
}

@media (max-width: 767.98px) {
    .navbar-collapse {
        padding: 0.5rem 0 0.85rem;
    }

    .navbar-nav {
        gap: 0.2rem;
    }

    .navbar .nav-link {
        padding: 0.7rem 0.85rem;
        border-radius: 0.6rem;
    }
}

@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        scroll-behavior: auto !important;
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
}