/* Paleta i motywy są wspólne z kalkulatorem ofert (app/css/styles.css) — te same
   zmienne, ten sam atrybut data-theme i ten sam klucz "theme" w localStorage,
   więc przełącznik motywu działa spójnie na obu stronach. Lokalne nazwy
   (--surface, --surface-soft, --muted) są aliasami wspólnych tokenów, żeby cały
   arkusz konfiguratora reagował na zmianę motywu. */
:root {
  color-scheme: light;
  --navy-950: #0a1628;
  --navy-900: #0f1f38;
  --navy-800: #16294a;
  --navy-700: #1f3a63;
  --navy-600: #2c4d7d;
  --amber-500: #f5a623;
  --amber-400: #ffb84d;
  --amber-600: #d6890f;

  --bg: #f4f6fa;
  --bg-elevated: #ffffff;
  --bg-muted: #eaeef5;
  --text: #101828;
  --text-muted: #5b6576;
  --border: #d7dde8;
  --accent: var(--navy-700);
  --accent-contrast: #ffffff;
  --highlight: var(--amber-500);
  --highlight-contrast: #1a1200;
  --danger: #c62828;
  --success: #1e7d34;
  --shadow: 0 1px 3px rgba(16, 24, 40, 0.08), 0 1px 2px rgba(16, 24, 40, 0.06);
  --radius: 8px;
  --scrollbar-thumb: #aeb8c8;
  --scrollbar-thumb-hover: #8794a8;
  --scrollbar-track: #e7ebf2;
  --select-arrow: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='16' height='16' viewBox='0 0 16 16'%3E%3Cpath d='M4 6l4 4 4-4' stroke='%235b6576' stroke-width='1.6' fill='none' stroke-linecap='round' stroke-linejoin='round'/%3E%3C/svg%3E");

  --surface: var(--bg-elevated);
  --surface-soft: var(--bg-muted);
  --muted: var(--text-muted);
  --amber-soft: rgba(245, 166, 35, 0.14);
  --amber-soft-text: #6b5a2f;
  --danger-soft: rgba(198, 40, 40, 0.12);

  /* Kolory schematu rozmieszczenia — celowo osobne od --accent, żeby profile
     (bursztyn) nie zlewały się z obrysem modułu przy ciemnym motywie. */
  --layout-module-fill: #dbe3ef;
  --layout-module-stroke: #2c4d7d;
  --layout-rail: #f5a623;
  --layout-joint: #e6007e;
  --layout-clamp-end: #d6890f;
  --layout-clamp-mid: #5b6576;
  --layout-support: #1e7d34;
}

:root[data-theme='dark'] {
  color-scheme: dark;
  --bg: var(--navy-950);
  --bg-elevated: var(--navy-900);
  --bg-muted: var(--navy-800);
  --text: #eef2f9;
  --text-muted: #9fb0c8;
  --border: var(--navy-700);
  --accent: var(--amber-500);
  --accent-contrast: #1a1200;
  --shadow: 0 1px 3px rgba(0, 0, 0, 0.4), 0 1px 2px rgba(0, 0, 0, 0.3);
  --scrollbar-thumb: var(--navy-600);
  --scrollbar-thumb-hover: var(--amber-500);
  --scrollbar-track: var(--navy-950);
  --select-arrow: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='16' height='16' viewBox='0 0 16 16'%3E%3Cpath d='M4 6l4 4 4-4' stroke='%239fb0c8' stroke-width='1.6' fill='none' stroke-linecap='round' stroke-linejoin='round'/%3E%3C/svg%3E");
  --amber-soft: rgba(245, 166, 35, 0.16);
  --amber-soft-text: #f0d9a8;
  --danger-soft: rgba(255, 138, 128, 0.16);
  --danger: #ff8a80;

  --layout-module-fill: #1f3a63;
  --layout-module-stroke: #8fb3e6;
  --layout-rail: #f5a623;
  --layout-joint: #ff5fb0;
  --layout-clamp-end: #ffd07a;
  --layout-clamp-mid: #9fb0c8;
  --layout-support: #57d68a;
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme='light']) {
    color-scheme: dark;
    --bg: var(--navy-950);
    --bg-elevated: var(--navy-900);
    --bg-muted: var(--navy-800);
    --text: #eef2f9;
    --text-muted: #9fb0c8;
    --border: var(--navy-700);
    --accent: var(--amber-500);
    --accent-contrast: #1a1200;
    --shadow: 0 1px 3px rgba(0, 0, 0, 0.4), 0 1px 2px rgba(0, 0, 0, 0.3);
    --scrollbar-thumb: var(--navy-600);
    --scrollbar-thumb-hover: var(--amber-500);
    --scrollbar-track: var(--navy-950);
    --select-arrow: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='16' height='16' viewBox='0 0 16 16'%3E%3Cpath d='M4 6l4 4 4-4' stroke='%239fb0c8' stroke-width='1.6' fill='none' stroke-linecap='round' stroke-linejoin='round'/%3E%3C/svg%3E");
    --amber-soft: rgba(245, 166, 35, 0.16);
    --amber-soft-text: #f0d9a8;
    --danger-soft: rgba(255, 138, 128, 0.16);
    --danger: #ff8a80;

    --layout-module-fill: #1f3a63;
    --layout-module-stroke: #8fb3e6;
    --layout-rail: #f5a623;
    --layout-joint: #ff5fb0;
    --layout-clamp-end: #ffd07a;
    --layout-clamp-mid: #9fb0c8;
    --layout-support: #57d68a;
  }
}

* {
  box-sizing: border-box;
  scrollbar-width: thin;
  scrollbar-color: var(--scrollbar-thumb) var(--scrollbar-track);
}

*::-webkit-scrollbar { width: 10px; height: 10px; }
*::-webkit-scrollbar-track { background: var(--scrollbar-track); border-radius: 999px; }
*::-webkit-scrollbar-thumb {
  background: var(--scrollbar-thumb);
  border: 2px solid var(--scrollbar-track);
  border-radius: 999px;
}
*::-webkit-scrollbar-thumb:hover { background: var(--scrollbar-thumb-hover); }

body {
  margin: 0;
  min-height: 100vh;
  font-family: 'Segoe UI', system-ui, -apple-system, BlinkMacSystemFont, sans-serif;
  background: var(--bg);
  color: var(--text);
}

button, input, select { font: inherit; }
button, label, select { -webkit-tap-highlight-color: transparent; }

.topbar {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  align-items: center;
  gap: 1rem;
  padding: 0.2rem 1.25rem;
  color: #fff;
  background: linear-gradient(120deg, var(--navy-900), var(--navy-800));
  box-shadow: var(--shadow);
  position: sticky;
  top: 0;
  z-index: 10;
}

.topbar-actions {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: 0.55rem;
  min-width: 0;
}

.back-link {
  color: #fff;
  text-decoration: none;
  white-space: nowrap;
}
.topbar .btn.ghost {
  background: transparent;
  border-color: rgba(255, 255, 255, 0.25);
  color: #fff;
}
.topbar .btn.ghost:hover { border-color: var(--amber-500); }

.header-icon-btn {
  display: inline-grid;
  place-items: center;
  background: rgba(255, 255, 255, 0.1);
  border: 1px solid rgba(255, 255, 255, 0.2);
  color: #fff;
  border-radius: 999px;
  width: 2.2rem;
  height: 2.2rem;
  cursor: pointer;
  font-size: 1rem;
}
.header-icon-btn:hover { background: rgba(255, 255, 255, 0.18); }

.brand-block { display: flex; align-items: center; gap: 0.6rem; min-width: 0; }
.brand-logo { width: auto; height: 52px; flex: 0 0 auto; }
.brand-block h1 { margin: 1px 0 0; font-size: 1.1rem; font-weight: 700; letter-spacing: 0.02em; }
.app-version-badge {
  display: inline-block;
  margin-left: 0.35rem;
  padding: 0.1rem 0.4rem;
  border: 0;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.12);
  color: rgba(255, 255, 255, 0.75);
  font: inherit;
  font-size: 0.7rem;
  font-weight: 600;
  vertical-align: middle;
  cursor: pointer;
}
.app-version-badge:hover { background: rgba(255, 255, 255, 0.2); color: #fff; }
.eyebrow { margin: 0; color: var(--muted); font-size: 0.72rem; font-weight: 750; letter-spacing: 0.1em; text-transform: uppercase; }
.topbar .eyebrow { color: #94a8c3; }

.page-shell { width: min(1480px, calc(100% - 32px)); margin: 0 auto; padding: 20px 0 54px; }

.configurator { display: grid; grid-template-columns: minmax(0, 1fr) 370px; gap: 20px; align-items: start; }
.config-column { display: grid; gap: 16px; }
.summary-column { position: sticky; top: 18px; display: grid; gap: 16px; }

.card {
  overflow: hidden;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
}
.section-card { padding: clamp(18px, 2vw, 26px); }
.section-heading { display: flex; align-items: flex-start; gap: 14px; margin-bottom: 20px; }
.section-heading h3, .summary-card h3 { margin: 0; color: var(--text); }
.visual-copy h3 { margin: 0; }
.section-heading p, .visual-copy p { margin: 4px 0 0; color: var(--muted); font-size: 0.88rem; line-height: 1.45; }
.section-number { flex: 0 0 auto; color: var(--amber-500); font-size: 0.76rem; font-weight: 800; letter-spacing: 0.08em; }
.row-heading .btn { margin-left: auto; }

.choice-grid { display: grid; gap: 12px; }
.roof-choice-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.system-choice-grid { grid-template-columns: repeat(auto-fill, minmax(215px, 1fr)); gap: 10px; }

.choice-card {
  position: relative;
  min-width: 0;
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  align-items: center;
  gap: 13px;
  padding-right: 14px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--surface-soft);
  cursor: pointer;
  transition: border-color 0.16s, box-shadow 0.16s, transform 0.16s;
}
.choice-card:hover { transform: translateY(-1px); border-color: var(--accent); }
.choice-card.selected { border-color: var(--amber-500); box-shadow: 0 0 0 2px rgba(245, 166, 35, 0.16); background: var(--amber-soft); }
.choice-card input { position: absolute; width: 1px; height: 1px; opacity: 0; }
.choice-copy { display: flex; min-width: 0; flex-direction: column; gap: 4px; padding: 15px 0; }
.choice-copy strong { color: var(--text); font-size: 0.92rem; }
.choice-copy small { color: var(--muted); line-height: 1.38; }

/* Ikony dachu rysowane tak samo jak w kalkulatorze ofert. Kafelek ikony jest
   wpuszczony w lewą krawędź karty — bez paska tła przed nim. */
.roof-card { overflow: hidden; align-items: stretch; }
.roof-icon {
  display: grid;
  place-items: center;
  width: 66px;
  align-self: stretch;
  min-height: 62px;
  border: 0;
  border-right: 1px solid var(--border);
  background: var(--surface);
  color: var(--muted);
}
.roof-icon-svg { width: 38px; height: 29px; fill: none; stroke: currentColor; stroke-width: 2; }
.roof-card .choice-copy { justify-content: center; }
.choice-card.selected .roof-icon { border-right-color: var(--amber-500); background: var(--amber-soft); color: var(--amber-500); }

/* Lista systemów jest krótka: sama nazwa. Zdjęcie oraz opis wybranego systemu
   pokazuje karta wizualizacji po prawej stronie. */
.choice-card-compact { grid-template-columns: minmax(0, 1fr); gap: 0; padding: 4px 12px; }
.choice-card-compact .choice-copy { padding: 11px 0; }
.choice-card-compact .choice-copy strong { font-size: 0.86rem; }

.selected-system-image { background: url("../assets/systemy-montazowe.webp") no-repeat; background-size: 200% 200%; }

.form-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 13px; }
.field { display: flex; min-width: 0; flex-direction: column; gap: 6px; }
.field > span { color: var(--muted); font-size: 0.77rem; font-weight: 650; }
.field.span-2 { grid-column: span 2; }
.field.span-3 { grid-column: span 3; }
.field input, .field select {
  width: 100%;
  min-height: 43px;
  padding: 9px 11px;
  border: 1px solid var(--border);
  border-radius: 6px;
  outline: none;
  background: var(--bg);
  color: var(--text);
}
/* Strzałkę selecta rysujemy sami — tak samo jak w kalkulatorze, żeby przeglądarka
   nie podmieniła jej na jasną, systemową przy ciemnym motywie. */
.field select {
  appearance: none;
  -webkit-appearance: none;
  -moz-appearance: none;
  padding-right: 2rem;
  background-image: var(--select-arrow);
  background-repeat: no-repeat;
  background-position: right 0.6rem center;
}
.field input:focus, .field select:focus { border-color: var(--amber-500); box-shadow: 0 0 0 3px rgba(245, 166, 35, 0.14); }

/* Pola liczbowe ze strzałkami ▲▼ — ten sam wygląd co w kalkulatorze ofert. */
.number-control { position: relative; display: flex; min-width: 0; }
.number-control > input {
  padding-right: 2.4rem;
  appearance: textfield;
  -moz-appearance: textfield;
}
.number-control > input::-webkit-inner-spin-button,
.number-control > input::-webkit-outer-spin-button { appearance: none; margin: 0; }
.number-step-buttons {
  position: absolute;
  top: 1px;
  right: 1px;
  bottom: 1px;
  width: 1.9rem;
  display: grid;
  grid-template-rows: 1fr 1fr;
  overflow: hidden;
  border-left: 1px solid var(--border);
  border-radius: 0 5px 5px 0;
}
.number-step-buttons button {
  display: grid;
  place-items: center;
  padding: 0;
  border: 0;
  background: var(--bg-muted);
  color: var(--muted);
  font-size: 0.58rem;
  line-height: 1;
  cursor: pointer;
}
.number-step-buttons button + button { border-top: 1px solid var(--border); }
.number-step-buttons button:hover { background: var(--amber-soft); color: var(--amber-500); }
.number-control:has(input:disabled) .number-step-buttons { opacity: 0.45; pointer-events: none; }

.option-row { display: flex; flex-wrap: wrap; gap: 9px; margin-top: 17px; }
.option-row label { cursor: pointer; }
.option-row input { position: absolute; opacity: 0; }
.option-row span { display: block; padding: 9px 12px; border: 1px solid var(--border); border-radius: 999px; color: var(--muted); font-size: 0.8rem; font-weight: 650; }
.option-row input:checked + span { border-color: var(--amber-500); background: var(--amber-soft); color: var(--text); }
.option-row label:has(input:focus-visible) span { outline: 2px solid var(--amber-500); outline-offset: 1px; }

/* Podgląd rozmieszczenia — schemat rysowany w SVG w milimetrach. */
.layout-legend {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 18px;
  margin: 0 0 16px;
  padding: 0;
  list-style: none;
  color: var(--muted);
  font-size: 0.76rem;
  font-weight: 650;
}
.layout-legend li { display: flex; align-items: center; gap: 7px; }
.legend-mark { width: 16px; height: 12px; border-radius: 3px; }
.legend-module { background: var(--layout-module-fill); border: 2px solid var(--layout-module-stroke); }
.legend-rail { background: var(--layout-rail); }
.legend-joint { width: 8px; height: 14px; background: var(--layout-joint); }
.legend-clamp-end { width: 9px; height: 14px; background: var(--layout-clamp-end); }
.legend-clamp-mid { width: 9px; height: 14px; background: var(--layout-clamp-mid); }
.legend-support { width: 13px; height: 13px; border-radius: 50%; background: var(--layout-support); }

.layout-preview { display: flex; flex-direction: column; gap: 18px; overflow-x: auto; padding-bottom: 4px; }
.layout-row { display: grid; gap: 6px; flex: 0 0 auto; min-width: min-content; }
.layout-row-title { margin: 0; color: var(--text); font-size: 0.86rem; }
.layout-row-title strong { color: var(--amber-500); }
.layout-repeats {
  margin-left: 8px;
  padding: 2px 8px;
  border-radius: 999px;
  background: var(--amber-soft);
  color: var(--amber-500);
  font-size: 0.72rem;
  font-weight: 700;
}
.layout-row-meta { margin: 0; color: var(--muted); font-size: 0.74rem; }
.layout-svg { display: block; height: auto; max-width: none; overflow: visible; }
.layout-module {
  fill: var(--layout-module-fill);
  fill-opacity: 0.72;
  stroke: var(--layout-module-stroke);
  stroke-width: 14;
}
.layout-rail { fill: var(--layout-rail); }
.layout-joint { fill: var(--layout-joint); }
.layout-clamp-end { fill: var(--layout-clamp-end); }
.layout-clamp-mid { fill: var(--layout-clamp-mid); }
.layout-support { fill: var(--layout-support); }
.layout-support-line {
  stroke: var(--layout-support);
  stroke-width: 8;
  stroke-dasharray: 30 26;
  opacity: 0.65;
}

/* Duży widok schematu */
.layout-modal-backdrop {
  position: fixed;
  inset: 0;
  z-index: 50;
  display: grid;
  place-items: center;
  padding: 18px;
  background: rgba(7, 19, 36, 0.62);
}
.layout-modal {
  display: flex;
  flex-direction: column;
  width: min(1500px, 96vw);
  max-height: 92vh;
  padding: 18px clamp(14px, 2vw, 24px) 20px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--surface);
  box-shadow: 0 18px 48px rgba(7, 19, 36, 0.35);
}
.layout-modal-header { display: flex; align-items: flex-start; justify-content: space-between; gap: 16px; }
.layout-modal-header h3 { margin: 4px 0 0; color: var(--text); }
.layout-modal .layout-legend { margin: 14px 0 12px; }
.layout-modal-close {
  border: 0;
  background: transparent;
  color: var(--muted);
  font-size: 1.5rem;
  line-height: 1;
  cursor: pointer;
}
.layout-modal-close:hover { color: var(--amber-500); }
.layout-modal-body { overflow: auto; }
.layout-modal-narrow { width: min(760px, 96vw); }

.changelog-list { margin-top: 14px; }
.changelog-entry { padding: 12px 0; border-top: 1px solid var(--border); }
.changelog-entry:first-child { border-top: 0; }
.changelog-version {
  display: flex;
  align-items: baseline;
  gap: 10px;
  margin: 0 0 6px;
  color: var(--text);
  font-weight: 750;
}
.changelog-entry.current .changelog-version { color: var(--amber-500); }
.changelog-date { color: var(--muted); font-size: 0.76rem; font-weight: 600; }
.changelog-entry ul { margin: 0; padding-left: 18px; color: var(--muted); line-height: 1.5; font-size: 0.86rem; }
.changelog-entry li + li { margin-top: 4px; }

/* Nazwy kolumn stoją raz nad listą — wiersze same ich nie powtarzają. Na wąskim
   ekranie wiersz układa się pionowo, więc wtedy wracają etykiety przy polach. */
.rows-header {
  display: grid;
  grid-template-columns: 42px repeat(3, minmax(0, 1fr)) 36px;
  gap: 10px;
  padding: 0 13px 6px;
  color: var(--muted);
  font-size: 0.72rem;
  font-weight: 750;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}
.field-inline-label { display: none; }

.row-list { display: grid; gap: 9px; }
.array-row { display: grid; grid-template-columns: 42px repeat(3, minmax(0, 1fr)) 36px; align-items: center; gap: 10px; padding: 10px 13px; border: 1px solid var(--border); border-radius: var(--radius); background: var(--surface-soft); }
.row-index { align-self: center; color: var(--amber-500); font-weight: 800; font-variant-numeric: tabular-nums; }
.remove-row { align-self: center; width: 32px; height: 32px; border: 0; border-radius: 50%; color: var(--danger); background: transparent; cursor: pointer; font-size: 1.3rem; }
.remove-row:hover { background: var(--danger-soft); }
.remove-row:disabled { opacity: 0.25; cursor: not-allowed; }

/* Przyciski trzymają się wyglądu .btn z kalkulatora. */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  min-height: 38px;
  padding: 0.55rem 1rem;
  border: 1px solid var(--border);
  border-radius: 6px;
  background: var(--bg-elevated);
  color: var(--text);
  cursor: pointer;
  font-weight: 600;
  font-size: 0.82rem;
}
.btn:hover { border-color: var(--accent); }
.btn.secondary { background: var(--accent); border-color: var(--accent); color: var(--accent-contrast); }
.btn.secondary:hover { filter: brightness(1.08); }

/* Karta wizualizacji zostaje ciemna w obu motywach (jak pasek nagłówka) — na ciemnym
   motywie sam navy-900 zlewałby się z pozostałymi kartami. */
.visual-summary { background: linear-gradient(120deg, var(--navy-900), var(--navy-800)); color: #fff; }
.selected-system-image { height: 230px; }
.visual-copy { padding: 19px; }
.visual-copy .eyebrow { color: var(--amber-500); }
.visual-copy h3 { margin-top: 5px; color: #fff; font-size: 1.2rem; }
.visual-copy p { color: #bdc9d9; }
.visual-note { display: inline-block; margin-top: 13px; color: #8ea1ba; font-size: 0.7rem; }

.summary-card { padding: 20px; }
.summary-title-row { display: flex; justify-content: space-between; align-items: flex-start; gap: 12px; }
.summary-title-row h3 { margin-top: 4px; }
.text-button { border: 0; background: transparent; color: var(--muted); cursor: pointer; font-size: 0.78rem; text-decoration: underline; }
.metrics { display: grid; grid-template-columns: 1fr 1fr; gap: 1px; margin: 19px 0; background: var(--border); border: 1px solid var(--border); border-radius: 11px; overflow: hidden; }
.metrics div { padding: 13px; background: var(--surface-soft); }
.metrics dt { color: var(--muted); font-size: 0.72rem; }
.metrics dd { margin: 4px 0 0; color: var(--accent); font-size: 1.05rem; font-weight: 750; }
.estimate-line { display: flex; justify-content: space-between; align-items: center; gap: 12px; padding-top: 15px; border-top: 1px solid var(--border); }
.estimate-line span { color: var(--muted); font-size: 0.8rem; }
.estimate-line strong { color: var(--accent); text-align: right; font-size: 0.88rem; }

.bom-section { margin-top: 20px; padding: clamp(18px, 2vw, 26px); }
.bom-heading-row { display: flex; align-items: flex-end; justify-content: space-between; gap: 18px; margin-bottom: 18px; }
.bom-heading-row h2 { margin: 5px 0 0; color: var(--text); font-size: 1.45rem; }
.data-version { color: var(--muted); font-size: 0.75rem; }
.table-wrap { overflow-x: auto; }
table { width: 100%; min-width: 860px; border-collapse: collapse; font-size: 0.86rem; }
th, td { padding: 11px 10px; border-bottom: 1px solid var(--border); text-align: left; }
th { color: var(--muted); font-size: 0.72rem; letter-spacing: 0.04em; text-transform: uppercase; }
td.numeric, th:nth-child(n+3) { text-align: right; font-variant-numeric: tabular-nums; }
tbody tr:hover { background: var(--surface-soft); }
tfoot td { border-bottom: 0; border-top: 2px solid var(--accent); font-weight: 750; text-align: right; }
.disclaimer { margin: 18px 0 0; padding: 13px 15px; border-left: 3px solid var(--amber-500); border-radius: 0 6px 6px 0; background: var(--amber-soft); color: var(--amber-soft-text); font-size: 0.8rem; line-height: 1.5; }

.status-card { margin-bottom: 18px; padding: 15px 17px; border-radius: var(--radius); }
.status-card.error { border: 1px solid var(--danger); color: var(--danger); background: var(--danger-soft); }
[hidden] { display: none !important; }

@media (max-width: 1100px) {
  .configurator { grid-template-columns: 1fr; }
  .summary-column { position: static; grid-template-columns: 1fr 1fr; }
}

@media (max-width: 760px) {
  .topbar { gap: 0.5rem; padding: 0.25rem 0.75rem; }
  .topbar-actions { gap: 0.35rem; }
  .back-link { font-size: 0.8rem; padding: 0.4rem 0.55rem; }
  .brand-block { gap: 9px; min-width: 0; }
  .brand-block h1 { font-size: 0.95rem; }
  .brand-logo { height: 38px; }
  .page-shell { width: min(100% - 20px, 1480px); padding-top: 16px; }
  .roof-choice-grid, .system-choice-grid, .summary-column { grid-template-columns: 1fr; }
  .form-grid { grid-template-columns: 1fr 1fr; }
  .field.span-3 { grid-column: span 2; }
  .rows-header { display: none; }
  .field-inline-label { display: block; }
  .array-row { grid-template-columns: 32px 1fr 32px; align-items: center; }
  .array-row .field { grid-column: 2; }
  .array-row .remove-row { grid-column: 3; grid-row: 1 / 4; }
  .row-heading { flex-wrap: wrap; }
  .row-heading .btn { width: 100%; margin-left: 42px; }
}

@media (max-width: 480px) {
  .choice-card { grid-template-columns: 54px minmax(0, 1fr); }
  .choice-card-compact { grid-template-columns: minmax(0, 1fr); }
  .roof-icon { width: 54px; min-height: 54px; }
  .roof-icon-svg { width: 32px; height: 24px; }
  .choice-copy { padding-left: 13px; }
  .choice-card-compact .choice-copy { padding-left: 0; }
  .form-grid { grid-template-columns: 1fr; }
  .field.span-2, .field.span-3 { grid-column: span 1; }
  .metrics { grid-template-columns: 1fr; }
}