:root {
    --page-bg: #f7f9fc;
    --ink: #102a43;
    --muted: #52616b;
    --navy: #1f4e79;
    --blue: #2457b8;
    --line: #dde6f0;
    --soft: #eef3f8;
    --white: #ffffff;
    --green: #16803c;
    --amber: #b45309;
    --shadow: 0 12px 30px rgba(15, 23, 42, 0.07);
}

* {
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    margin: 0;
    background: var(--page-bg);
    color: var(--ink);
    font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
    line-height: 1.5;
}

a {
    color: inherit;
}

.site-header {
    background: var(--white);
    border-bottom: 1px solid var(--line);
}

.top-nav {
    align-items: center;
    display: flex;
    gap: 1rem;
    justify-content: space-between;
    margin: 0 auto;
    max-width: 1120px;
    padding: 1rem 1.25rem;
}

.brand {
    color: var(--ink);
    font-size: 1.05rem;
    font-weight: 900;
    text-decoration: none;
}

.nav-links {
    display: flex;
    flex-wrap: wrap;
    gap: 1.15rem;
    font-size: 0.95rem;
}

.nav-links a {
    color: var(--navy);
    font-weight: 750;
    text-decoration: none;
}

.hero {
    margin: 0 auto;
    max-width: 1120px;
    padding: 4rem 1.25rem 3.5rem;
}

.eyebrow {
    color: var(--navy);
    font-size: 0.84rem;
    font-weight: 800;
    letter-spacing: 0.08em;
    margin: 0 0 0.7rem;
    text-transform: uppercase;
}

.hero h1 {
    color: var(--ink);
    font-size: clamp(2.35rem, 7vw, 4.1rem);
    letter-spacing: 0;
    line-height: 1.05;
    margin: 0 0 1rem;
    max-width: 820px;
}

.subtitle {
    color: #334e68;
    font-size: 1.18rem;
    line-height: 1.62;
    margin: 0;
    max-width: 760px;
}

.button-row {
    display: flex;
    flex-wrap: wrap;
    gap: 0.9rem;
    margin-top: 1.7rem;
}

.primary-btn,
.secondary-btn,
.score-btn {
    align-items: center;
    border-radius: 8px;
    display: inline-flex;
    font-weight: 800;
    justify-content: center;
    min-height: 44px;
    padding: 0.78rem 1.15rem;
    text-decoration: none;
}

.primary-btn,
.score-btn {
    background: var(--navy);
    border: 1px solid var(--navy);
    color: white;
}

.secondary-btn {
    background: white;
    border: 1px solid #afc4d8;
    color: var(--navy);
}

main {
    margin: 0 auto;
    max-width: 1120px;
    padding: 1.25rem 1.25rem 3rem;
}

.metrics {
    display: grid;
    gap: 1rem;
    grid-template-columns: repeat(4, minmax(0, 1fr));
    margin: 0 0 2rem;
}

.metric-card,
.project-card,
.results-panel,
.scorer-form {
    background: var(--white);
    border: 1px solid var(--line);
    border-radius: 8px;
    box-shadow: var(--shadow);
}

.metric-card {
    padding: 1rem;
}

.metric-label,
.result-label {
    color: var(--muted);
    font-size: 0.78rem;
    font-weight: 750;
}

.metric-value {
    color: var(--ink);
    font-size: 1.65rem;
    font-weight: 850;
    margin: 0.2rem 0;
}

.metric-note {
    color: var(--muted);
    font-size: 0.82rem;
}

.page-section {
    border-top: 1px solid var(--line);
    padding: 2rem 0;
}

.page-section h2,
.section-title h2,
.result-heading h2 {
    color: var(--ink);
    font-size: 1.85rem;
    letter-spacing: 0;
    line-height: 1.2;
    margin: 0 0 0.7rem;
}

.page-section > p,
.section-title p,
.result-heading p {
    color: var(--muted);
    margin: 0 0 1.1rem;
    max-width: 780px;
}

.project-grid {
    display: grid;
    gap: 1rem;
    grid-template-columns: repeat(3, minmax(0, 1fr));
}

.project-card {
    min-height: 172px;
    padding: 1.25rem;
}

.card-kicker {
    color: var(--navy);
    font-size: 0.72rem;
    font-weight: 850;
    letter-spacing: 0.08em;
    margin: 0 0 0.55rem;
    text-transform: uppercase;
}

.project-card h3 {
    color: var(--ink);
    font-size: 1.08rem;
    margin: 0 0 0.55rem;
}

.project-card p {
    color: var(--muted);
    margin: 0;
}

.stack-list {
    display: grid;
    gap: 0.8rem;
    grid-template-columns: repeat(5, minmax(0, 1fr));
}

.stack-list span {
    background: var(--white);
    border: 1px solid var(--line);
    border-radius: 8px;
    color: var(--ink);
    font-weight: 750;
    padding: 0.85rem;
    text-align: center;
}

.scorer-section {
    background: linear-gradient(180deg, #ffffff 0%, #f4f8fc 100%);
    border: 1px solid var(--line);
    border-radius: 8px;
    margin-top: 1rem;
    padding: 1.5rem;
}

.scorer-layout {
    display: grid;
    gap: 1rem;
    grid-template-columns: minmax(0, 1.04fr) minmax(0, 0.96fr);
}

.scorer-form,
.results-panel {
    padding: 1.25rem;
}

fieldset {
    border: 1px solid var(--line);
    border-radius: 8px;
    display: grid;
    gap: 0.85rem;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    margin: 0 0 1rem;
    padding: 1rem;
}

legend {
    color: var(--navy);
    font-size: 0.82rem;
    font-weight: 850;
    padding: 0 0.35rem;
}

.field {
    display: grid;
    gap: 0.35rem;
}

.field-full {
    grid-column: 1 / -1;
}

.field span {
    color: var(--muted);
    font-size: 0.83rem;
    font-weight: 750;
}

select,
input {
    background: #ffffff;
    border: 1px solid #cbd7e5;
    border-radius: 8px;
    color: var(--ink);
    font: inherit;
    min-height: 42px;
    padding: 0.58rem 0.65rem;
    width: 100%;
}

select:focus,
input:focus {
    border-color: var(--blue);
    box-shadow: 0 0 0 3px rgba(36, 87, 184, 0.15);
    outline: none;
}

.score-btn {
    cursor: pointer;
    font-size: 0.98rem;
    width: 100%;
}

.score-btn:disabled {
    cursor: wait;
    opacity: 0.68;
}

.status-message,
.warning-message {
    background: #fff7ed;
    border: 1px solid #fed7aa;
    border-radius: 8px;
    color: #92400e;
    margin: 1rem 0;
    padding: 0.85rem 1rem;
}

.warning-message {
    background: #fef2f2;
    border-color: #fecaca;
    color: #991b1b;
}

.result-strip {
    display: grid;
    gap: 0.6rem;
    grid-template-columns: repeat(4, minmax(0, 1fr));
    margin: 1rem 0;
}

.result-strip > div,
.state-card,
.recommendation-card {
    border-radius: 8px;
    padding: 0.8rem;
}

.result-strip > div {
    background: #f8fafc;
    border: 1px solid var(--line);
    text-align: center;
}

.result-strip strong {
    color: var(--ink);
    display: block;
    font-size: 1.12rem;
    line-height: 1.25;
    margin-top: 0.15rem;
}

.drivers {
    color: var(--muted);
    margin: 0.4rem 0 1rem;
    padding-left: 1.2rem;
}

.chart-grid,
.action-grid,
.state-grid {
    display: grid;
    gap: 1rem;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    margin: 1rem 0;
}

.chart-box {
    min-height: 300px;
}

.state-card {
    background: #f8fafc;
    border: 1px solid #e2e8f0;
    border-left: 4px solid #64748b;
    color: #334155;
}

.state-card strong {
    color: #0f172a;
}

.recommendation-card {
    background: #e9f7ef;
    border: 1px solid #bfe7cd;
    border-left: 6px solid var(--green);
    color: #0f5132;
}

.recommendation-label {
    font-size: 0.7rem;
    font-weight: 800;
    letter-spacing: 0.05em;
    text-transform: uppercase;
}

.recommendation-title {
    font-size: 1.12rem;
    font-weight: 850;
    line-height: 1.2;
    margin: 0.25rem 0;
}

.data-table {
    border-collapse: collapse;
    color: var(--ink);
    font-size: 0.9rem;
    margin-top: 0.75rem;
    width: 100%;
}

.data-table th,
.data-table td {
    border-bottom: 1px solid var(--line);
    padding: 0.55rem;
    text-align: left;
}

.data-table th {
    color: var(--muted);
    font-size: 0.75rem;
    text-transform: uppercase;
}

.details {
    border-top: 1px solid var(--line);
    margin-top: 1.1rem;
    padding-top: 1rem;
}

.site-footer {
    border-top: 1px solid var(--line);
    color: #6b7280;
    font-size: 0.9rem;
    padding: 1.2rem;
    text-align: center;
}

@media (max-width: 980px) {
    .metrics,
    .project-grid,
    .stack-list,
    .scorer-layout,
    .result-strip,
    .chart-grid,
    .action-grid,
    .state-grid {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 640px) {
    .top-nav {
        align-items: flex-start;
        flex-direction: column;
    }

    .hero {
        padding: 2.5rem 1.25rem;
    }

    .scorer-section {
        padding: 1rem;
    }

    fieldset {
        grid-template-columns: 1fr;
    }
}