/* Reset & base */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

:root {
    --bg: #f4f4f4;
    --panel-bg: #ffffff;
    --primary: #002656;
    --primary-hover: #001d42;
    --accent: #c41230;
    --accent-hover: #a30f28;
    --accent-light: #f23343;
    --green: #4a8c5c;
    --cyan: #4a90c4;
    --danger: #c41230;
    --text: #232222;
    --text-muted: #5a5a5a;
    --border: #d8d4cf;
    --radius: 6px;
    --building-facade: #c4b9a8;
    --building-window: #9a8e7f;
    --building-roof: #8a7e6f;
    --pipe-blue: #4a90c4;
}

body {
    font-family: "Host Grotesk", "Jost", -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
    background: var(--bg);
    color: var(--text);
    line-height: 1.6;
}

/* Header */
header {
    background: #ffffff;
    color: var(--primary);
    padding: 1rem 2rem;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 1rem;
    border-bottom: 3px solid var(--accent);
}
.header-logo {
    height: 38px;
    width: auto;
    flex-shrink: 0;
}
.header-text { text-align: center; }
header h1 {
    font-family: "Host Grotesk", "Jost", sans-serif;
    font-size: 1.35rem;
    font-weight: 600;
    letter-spacing: 0.02em;
    color: var(--primary);
}
.subtitle {
    font-family: "Jost", "Host Grotesk", sans-serif;
    font-size: 0.82rem;
    color: var(--text-muted);
    margin-top: 0.1rem;
    font-weight: 400;
    letter-spacing: 0.03em;
}

main { max-width: 1100px; margin: 1.5rem auto; padding: 0 1rem; }

/* Panels */
.panel {
    background: var(--panel-bg);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 1.25rem 1.5rem;
    margin-bottom: 1rem;
}
.panel h2 {
    font-family: "Host Grotesk", "Jost", sans-serif;
    font-size: 1rem;
    font-weight: 600;
    margin-bottom: 0.75rem;
    color: var(--primary);
    border-bottom: 2px solid var(--accent);
    padding-bottom: 0.35rem;
    display: inline-block;
    text-transform: uppercase;
    letter-spacing: 0.04em;
}
.error-panel { border-color: var(--danger); background: #fef2f2; }
.error-panel p { color: var(--danger); font-weight: 500; }

/* ─── Location bar ─── */
.location-bar {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    align-items: center;
    margin-bottom: 0.75rem;
}
.location-bar input {
    flex: 1;
    min-width: 200px;
    padding: 0.45rem 0.75rem;
    border: 1px solid var(--border);
    border-radius: 4px;
    font-size: 0.9rem;
    font-family: inherit;
}
.location-bar input:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 2px rgba(0,38,86,0.12);
}
#search-btn {
    background: var(--primary);
    color: #fff;
    border: none;
    padding: 0.45rem 1.2rem;
    border-radius: 4px;
    font-weight: 600;
    cursor: pointer;
    font-size: 0.9rem;
    font-family: inherit;
}
#search-btn:hover { background: var(--primary-hover); }

.weather-badges { display: flex; gap: 0.5rem; }
.badge {
    background: #e8ecf2;
    color: var(--primary);
    padding: 0.3rem 0.75rem;
    border-radius: 20px;
    font-size: 0.8rem;
    white-space: nowrap;
}
.badge strong { font-weight: 700; }

#map {
    height: 280px;
    border-radius: var(--radius);
    border: 1px solid var(--border);
}
.temp-sparkline {
    margin-top: 0.75rem;
}
.temp-sparkline-title {
    font-size: 0.82rem;
    font-weight: 600;
    color: var(--primary);
    margin-bottom: 0.25rem;
}
.temp-sparkline svg {
    display: block;
    width: 100%;
}
.temp-sparkline-source {
    font-size: 0.72rem;
    color: var(--text-muted);
    margin-top: 0.2rem;
    font-style: italic;
}
#location-status { margin-top: 0.4rem; font-size: 0.82rem; }

/* ─── Designer ─── */
.designer-layout {
    display: grid;
    grid-template-columns: 300px 1fr;
    gap: 1.25rem;
    align-items: start;
}
@media (max-width: 768px) {
    .designer-layout { grid-template-columns: 1fr; }
}

.designer-controls { display: flex; flex-direction: column; gap: 0.75rem; }

.ctrl-group {
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 0.75rem;
}
.ctrl-group h3 {
    font-family: "Host Grotesk", "Jost", sans-serif;
    font-size: 0.78rem;
    text-transform: uppercase;
    letter-spacing: 0.06em;
    color: var(--primary);
    margin-bottom: 0.5rem;
    font-weight: 600;
}
details.ctrl-group summary { cursor: pointer; }
details.ctrl-group[open] summary { margin-bottom: 0.5rem; }

/* Heat pump model selector */
.ctrl-row select {
    width: 100px;
    padding: 0.3rem 0.4rem;
    border: 1px solid var(--border);
    border-radius: 4px;
    font-size: 0.85rem;
    font-family: inherit;
    background: #fff;
    color: var(--text);
}
.ctrl-row select:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 2px rgba(0,38,86,0.12);
}
.hp-model-info {
    background: #e8ecf2;
    border-radius: 4px;
    padding: 0.5rem 0.6rem;
    margin-bottom: 0.5rem;
    font-size: 0.78rem;
    line-height: 1.5;
    color: var(--primary);
}
.hp-model-info strong { font-weight: 600; }
.hp-model-info .hp-tag {
    display: inline-block;
    background: var(--primary);
    color: #fff;
    font-size: 0.7rem;
    padding: 0.1rem 0.4rem;
    border-radius: 3px;
    font-weight: 600;
    margin-right: 0.3rem;
}
.ctrl-row.disabled label { opacity: 0.45; }
.ctrl-row.disabled input { opacity: 0.45; pointer-events: none; }

.ctrl-row {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 0.5rem;
    margin-bottom: 0.4rem;
}
.ctrl-row label {
    font-size: 0.85rem;
    font-weight: 500;
    white-space: nowrap;
    color: var(--text);
}
.ctrl-row input[type="number"] {
    width: 80px;
    padding: 0.3rem 0.5rem;
    border: 1px solid var(--border);
    border-radius: 4px;
    font-size: 0.85rem;
    text-align: right;
    font-family: inherit;
}
.ctrl-row input:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 2px rgba(0,38,86,0.12);
}

/* Stepper +/- buttons */
.stepper { display: flex; align-items: center; gap: 0; }
.btn-step {
    width: 30px;
    height: 30px;
    border: 1px solid var(--border);
    background: var(--bg);
    font-size: 1rem;
    font-weight: 700;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: background 0.15s;
    color: var(--primary);
}
.btn-step:hover { background: #d0dae8; }
.btn-step:first-child { border-radius: 4px 0 0 4px; }
.btn-step:last-child  { border-radius: 0 4px 4px 0; }
.step-val {
    width: 40px;
    text-align: center;
    font-weight: 700;
    font-size: 0.95rem;
    border-top: 1px solid var(--border);
    border-bottom: 1px solid var(--border);
    height: 30px;
    line-height: 30px;
    background: #fff;
    color: var(--primary);
}

/* ─── Building SVG ─── */
.building-viz {
    background: linear-gradient(180deg, #d6e4f0 0%, #e8ecf2 50%, #c8d8c0 90%, #9ab88e 100%);
    border-radius: var(--radius);
    border: 1px solid var(--border);
    min-height: 420px;
    display: flex;
    align-items: flex-end;
    justify-content: center;
    overflow: hidden;
    padding: 0.5rem 0.5rem 0;
}
.building-viz svg { width: 100%; height: auto; }

/* ─── Simulation bar ─── */
.sim-bar {
    display: flex;
    flex-wrap: wrap;
    gap: 1rem;
    align-items: center;
}
.sim-bar .ctrl-row { margin-bottom: 0; }
#run-btn {
    background: var(--accent);
    color: #fff;
    border: none;
    padding: 0.6rem 2rem;
    font-size: 0.95rem;
    font-weight: 700;
    border-radius: var(--radius);
    cursor: pointer;
    transition: background 0.2s;
    font-family: inherit;
    letter-spacing: 0.02em;
}
#run-btn:hover:not(:disabled) { background: var(--accent-hover); }
#run-btn:disabled { opacity: 0.5; cursor: not-allowed; }
#run-btn.running { background: var(--text-muted); }

/* ─── Summary cards ─── */
.summary-cards {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
    gap: 0.75rem;
    margin-top: 1rem;
}
.card {
    background: var(--bg);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 0.75rem;
    text-align: center;
    border-top: 3px solid var(--primary);
}
.card-label {
    display: block;
    font-size: 0.72rem;
    text-transform: uppercase;
    letter-spacing: 0.04em;
    color: var(--text-muted);
    margin-bottom: 0.25rem;
    font-weight: 600;
}
.card-value {
    display: block;
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--primary);
}

/* ─── Charts ─── */
.chart-wrapper { margin-bottom: 1.5rem; }
.chart-wrapper h3 {
    font-family: "Host Grotesk", "Jost", sans-serif;
    font-size: 0.9rem;
    margin-bottom: 0.5rem;
    color: var(--primary);
    font-weight: 600;
    display: flex;
    align-items: center;
    gap: 0.4rem;
}
.chart-wrapper canvas { max-height: 350px; }
#results-summary { margin-bottom: 1rem; font-size: 0.9rem; color: var(--text-muted); }

/* ─── Info icon + tooltip ─── */
.info-icon {
    position: relative;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    color: var(--text-muted);
    cursor: help;
    flex-shrink: 0;
    vertical-align: middle;
    outline: none;
}
.info-icon:hover, .info-icon:focus { color: var(--primary); }
.info-tooltip {
    display: none;
    position: absolute;
    left: 50%;
    bottom: calc(100% + 8px);
    transform: translateX(-50%);
    width: 300px;
    background: var(--primary);
    color: #fff;
    font-size: 0.78rem;
    font-weight: 400;
    line-height: 1.5;
    padding: 0.65rem 0.8rem;
    border-radius: var(--radius);
    box-shadow: 0 4px 16px rgba(0,0,0,0.18);
    z-index: 100;
    pointer-events: none;
    text-transform: none;
    letter-spacing: normal;
}
.info-tooltip::after {
    content: "";
    position: absolute;
    top: 100%;
    left: 50%;
    transform: translateX(-50%);
    border: 6px solid transparent;
    border-top-color: var(--primary);
}
.info-icon:hover .info-tooltip,
.info-icon:focus .info-tooltip {
    display: block;
}

/* ─── Data table ─── */
details summary { cursor: pointer; color: var(--primary); font-size: 0.9rem; font-weight: 600; }
.results-table { width: 100%; border-collapse: collapse; font-size: 0.85rem; margin-top: 0.75rem; }
.results-table th, .results-table td { border: 1px solid var(--border); padding: 0.35rem 0.6rem; text-align: right; }
.results-table th { background: var(--bg); font-weight: 600; position: sticky; top: 0; color: var(--primary); }
.results-table td:first-child, .results-table th:first-child { text-align: left; }
#results-table-container { max-height: 400px; overflow: auto; margin-top: 0.5rem; }

/* ─── Upload ─── */
#upload-dropzone {
    border: 2px dashed var(--border);
    border-radius: var(--radius);
    padding: 1.5rem;
    text-align: center;
}
#upload-dropzone.dragover { border-color: var(--primary); background: rgba(0,38,86,0.04); }
#upload-dropzone p { margin-bottom: 0.4rem; color: var(--text-muted); }
.upload-btn {
    display: inline-block;
    background: var(--primary);
    color: #fff;
    padding: 0.4rem 1.2rem;
    border-radius: var(--radius);
    cursor: pointer;
    font-weight: 500;
    font-size: 0.85rem;
    font-family: inherit;
}
.upload-btn:hover { background: var(--primary-hover); }
#upload-status { margin-top: 0.5rem; font-size: 0.82rem; }
.upload-success { color: var(--green); }
.upload-error { color: var(--danger); }

.hint { font-size: 0.82rem; color: var(--text-muted); }

/* ─── Model selector row ─── */
.model-selector {
    display: flex;
    align-items: center;
    gap: 4px;
}
.model-selector select {
    flex: 1;
}
.icon-btn {
    width: 28px;
    height: 28px;
    border: 1px solid var(--border);
    border-radius: 4px;
    background: var(--bg);
    color: var(--primary);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
    transition: background 0.15s;
}
.icon-btn:hover { background: #d0dae8; }

/* ─── Modal ─── */
.modal-overlay {
    position: fixed;
    inset: 0;
    z-index: 1000;
    background: rgba(0, 0, 0, 0.45);
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 1rem;
}
.modal-dialog {
    background: #fff;
    border-radius: 8px;
    width: 95vw;
    max-width: 1050px;
    max-height: 90vh;
    display: flex;
    flex-direction: column;
    box-shadow: 0 12px 48px rgba(0,0,0,0.25);
}
.modal-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 1rem 1.25rem;
    border-bottom: 2px solid var(--accent);
}
.modal-header h3 {
    font-family: "Host Grotesk", "Jost", sans-serif;
    font-size: 1rem;
    font-weight: 600;
    color: var(--primary);
    text-transform: uppercase;
    letter-spacing: 0.04em;
}
.modal-close-btn {
    background: none;
    border: none;
    font-size: 1.5rem;
    cursor: pointer;
    color: var(--text-muted);
    line-height: 1;
}
.modal-close-btn:hover { color: var(--accent); }
.modal-body {
    padding: 1rem 1.25rem;
    overflow-y: auto;
    flex: 1;
}
.modal-footer {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.75rem 1.25rem;
    border-top: 1px solid var(--border);
}
.modal-footer-spacer { flex: 1; }
.btn-primary {
    background: var(--accent);
    color: #fff;
    border: none;
    padding: 0.45rem 1.2rem;
    border-radius: 4px;
    font-weight: 600;
    cursor: pointer;
    font-family: inherit;
    font-size: 0.85rem;
}
.btn-primary:hover { background: var(--accent-hover); }
.btn-secondary {
    background: var(--bg);
    color: var(--primary);
    border: 1px solid var(--border);
    padding: 0.45rem 1.2rem;
    border-radius: 4px;
    font-weight: 600;
    cursor: pointer;
    font-family: inherit;
    font-size: 0.85rem;
}
.btn-secondary:hover { background: #d0dae8; }
.btn-danger {
    background: none;
    color: var(--danger);
    border: 1px solid var(--danger);
    padding: 0.45rem 1rem;
    border-radius: 4px;
    font-weight: 600;
    cursor: pointer;
    font-family: inherit;
    font-size: 0.85rem;
}
.btn-danger:hover { background: #fef2f2; }

/* Metadata grid */
.hp-meta-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(170px, 1fr));
    gap: 0.5rem 0.75rem;
    margin-bottom: 1rem;
}
.hp-meta-field label {
    display: block;
    font-size: 0.72rem;
    text-transform: uppercase;
    letter-spacing: 0.04em;
    color: var(--text-muted);
    font-weight: 600;
    margin-bottom: 0.2rem;
}
.hp-meta-field input,
.hp-meta-field select {
    width: 100%;
    padding: 0.35rem 0.5rem;
    border: 1px solid var(--border);
    border-radius: 4px;
    font-size: 0.85rem;
    font-family: inherit;
    color: var(--text);
}
.hp-meta-field input:focus,
.hp-meta-field select:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 2px rgba(0,38,86,0.12);
}
.hp-meta-field input[readonly] {
    background: var(--bg);
    color: var(--text-muted);
}

/* Performance table sections */
.perf-section {
    margin-bottom: 1rem;
}
.perf-section h4 {
    font-family: "Host Grotesk", "Jost", sans-serif;
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--primary);
    margin-bottom: 0.4rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}
.extrap-note {
    font-size: 0.72rem;
    font-weight: 400;
    color: var(--text-muted);
    font-style: italic;
}
.perf-table-scroll {
    overflow-x: auto;
    border: 1px solid var(--border);
    border-radius: 4px;
}

/* Performance data table */
.perf-table {
    border-collapse: collapse;
    font-size: 0.75rem;
    white-space: nowrap;
    width: max-content;
    min-width: 100%;
}
.perf-table th,
.perf-table td {
    border: 1px solid #e0dcd8;
    padding: 0.2rem 0.35rem;
    text-align: center;
}
.perf-table thead th {
    background: var(--primary);
    color: #fff;
    font-weight: 600;
    font-size: 0.72rem;
    position: sticky;
    top: 0;
    z-index: 2;
}
.perf-table tbody th {
    background: #e8ecf2;
    color: var(--primary);
    font-weight: 600;
    font-size: 0.72rem;
    position: sticky;
    left: 0;
    z-index: 1;
    min-width: 52px;
}
.perf-table .perf-corner {
    background: var(--primary);
    color: #fff;
    position: sticky;
    left: 0;
    z-index: 3;
    font-size: 0.68rem;
}
.perf-table td {
    font-family: "JetBrains Mono", "SF Mono", "Consolas", monospace;
    font-size: 0.73rem;
}
.perf-table td.perf-extrap {
    background: #fffbf0;
}
.perf-table td.perf-null {
    color: #b0aaa0;
    font-weight: 400;
}
.perf-table .perf-input {
    width: 56px;
    border: 1px solid transparent;
    border-radius: 2px;
    text-align: center;
    font-size: 0.73rem;
    font-family: inherit;
    padding: 0.15rem 0.1rem;
    background: transparent;
}
.perf-table .perf-input:focus {
    border-color: var(--primary);
    background: #fff;
    outline: none;
}
.perf-table td.perf-extrap .perf-input {
    background: #fffbf0;
}
.perf-table .extrap-star {
    color: var(--accent);
    font-weight: 700;
    font-size: 0.65rem;
    vertical-align: super;
}

/* Footer */
footer {
    text-align: center;
    padding: 1.5rem 1rem;
    font-size: 0.8rem;
    color: var(--text-muted);
}
footer a { color: var(--primary); font-weight: 500; }