/* =====================================================================
   HowMuchBattery.com — style.css
   All styles scoped under .hmb-app to stay WordPress-safe.
   Amber/gold energy accent. Light mode default + dark mode.
   ===================================================================== */

/* ---------- Scoped design tokens ---------- */
.hmb-app {
  --hmb-amber: #e8890c;
  --hmb-amber-2: #f5a623;
  --hmb-amber-soft: rgba(232, 137, 12, 0.12);
  --hmb-green: #1f9d55;

  --hmb-bg: #f3f4f6;
  --hmb-bg-2: #eceef1;
  --hmb-surface: #ffffff;
  --hmb-surface-2: #f7f8fa;
  --hmb-ink: #1a1d21;
  --hmb-ink-2: #3b414a;
  --hmb-muted: #6b7280;
  --hmb-border: #e2e5ea;
  --hmb-border-2: #d3d8e0;
  --hmb-shadow: 0 1px 2px rgba(16, 20, 26, 0.05), 0 8px 24px rgba(16, 20, 26, 0.06);
  --hmb-shadow-lg: 0 18px 50px rgba(16, 20, 26, 0.14);
  --hmb-radius: 16px;
  --hmb-radius-sm: 10px;
  --hmb-shell: 1200px;
  --hmb-font: "Segoe UI", system-ui, -apple-system, "Helvetica Neue", Arial, sans-serif;

  font-family: var(--hmb-font);
  color: var(--hmb-ink);
  background: var(--hmb-bg);
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
  box-sizing: border-box;
  min-height: 100vh;
}
.hmb-app *,
.hmb-app *::before,
.hmb-app *::after { box-sizing: border-box; }

.hmb-app[data-theme="dark"] {
  --hmb-bg: #131519;
  --hmb-bg-2: #16181d;
  --hmb-surface: #1c1f26;
  --hmb-surface-2: #23272f;
  --hmb-ink: #eef1f5;
  --hmb-ink-2: #c7cdd6;
  --hmb-muted: #97a0ad;
  --hmb-border: #2b303a;
  --hmb-border-2: #363c47;
  --hmb-amber: #f5a623;
  --hmb-amber-2: #ffb838;
  --hmb-amber-soft: rgba(245, 166, 35, 0.14);
  --hmb-shadow: 0 1px 2px rgba(0, 0, 0, 0.4), 0 10px 30px rgba(0, 0, 0, 0.45);
  --hmb-shadow-lg: 0 24px 60px rgba(0, 0, 0, 0.6);
}

.hmb-app .hmb-shell { max-width: var(--hmb-shell); margin: 0 auto; padding: 0 22px; width: 100%; }
.hmb-app [hidden] { display: none !important; }

/* ---------- Typography (scoped, no bare tag styling) ---------- */
.hmb-app .hmb-h1 {
  font-size: clamp(2.1rem, 5vw, 3.6rem);
  line-height: 1.05; letter-spacing: -0.02em; font-weight: 800;
  margin: 0 0 14px;
}
.hmb-app .hmb-h2 { font-size: clamp(1.4rem, 2.6vw, 1.9rem); font-weight: 750; letter-spacing: -0.01em; margin: 0 0 6px; }
.hmb-app .hmb-h3 { font-size: 1.15rem; font-weight: 700; margin: 0 0 10px; }
.hmb-app .hmb-h4 { font-size: 1rem; font-weight: 700; margin: 0 0 6px; }
.hmb-app .hmb-muted { color: var(--hmb-muted); font-size: 0.98rem; margin: 0; max-width: 62ch; }
.hmb-app .hmb-vh { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); }

.hmb-app section { margin-top: 64px; }

/* ---------- Top bar ---------- */
.hmb-app .hmb-topbar {
  position: sticky; top: 0; z-index: 40;
  background: color-mix(in srgb, var(--hmb-bg) 88%, transparent);
  backdrop-filter: blur(14px); -webkit-backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--hmb-border);
}
.hmb-app .hmb-topbar-inner { display: flex; align-items: center; justify-content: space-between; height: 66px; gap: 16px; }
.hmb-app .hmb-brand { display: inline-flex; align-items: center; gap: 11px; text-decoration: none; color: var(--hmb-ink); font-weight: 700; }
.hmb-app .hmb-brand-text { font-size: 1.12rem; letter-spacing: -0.01em; }
.hmb-app .hmb-brand-text strong { color: var(--hmb-amber); }
.hmb-app .hmb-brand-tld { color: var(--hmb-muted); font-weight: 600; }
.hmb-app .hmb-brand-mark { display: inline-flex; }
.hmb-app .hmb-brand-batt {
  width: 34px; height: 20px; border: 2.5px solid var(--hmb-ink); border-radius: 5px; position: relative; padding: 2px; display: block;
}
.hmb-app .hmb-brand-batt::after { content: ""; position: absolute; right: -6px; top: 5px; width: 4px; height: 8px; background: var(--hmb-ink); border-radius: 0 2px 2px 0; }
.hmb-app .hmb-brand-fill { display: block; height: 100%; width: 68%; background: linear-gradient(90deg, var(--hmb-amber), var(--hmb-amber-2)); border-radius: 1px; animation: hmb-pulse 3.2s ease-in-out infinite; }
@keyframes hmb-pulse { 0%,100% { width: 55%; } 50% { width: 82%; } }

.hmb-app .hmb-topbar-actions { display: flex; align-items: center; gap: 12px; }
.hmb-app .hmb-country-select { max-width: 190px; }

.hmb-app .hmb-theme-toggle {
  width: 44px; height: 30px; border-radius: 999px; border: 1px solid var(--hmb-border-2);
  background: var(--hmb-surface-2); position: relative; cursor: pointer; flex: none; transition: background-color .2s;
}
.hmb-app .hmb-theme-toggle::after {
  content: ""; position: absolute; top: 2px; left: 2px; width: 24px; height: 24px; border-radius: 50%;
  background: var(--hmb-amber); transition: transform .25s ease;
}
.hmb-app[data-theme="dark"] .hmb-theme-toggle::after { transform: translateX(14px); }
.hmb-app .hmb-theme-ico { position: absolute; top: 7px; font-size: 12px; }
.hmb-app .hmb-theme-ico-sun { right: 8px; width: 12px; height: 12px; border-radius: 50%; box-shadow: 0 0 0 2px var(--hmb-amber-2); }
.hmb-app .hmb-theme-ico-moon { left: 9px; width: 11px; height: 11px; border-radius: 50%; box-shadow: inset -3px 0 0 0 var(--hmb-muted); opacity: .0; }
.hmb-app[data-theme="dark"] .hmb-theme-ico-sun { opacity: 0; }
.hmb-app[data-theme="dark"] .hmb-theme-ico-moon { opacity: 1; }

/* ---------- Hero ---------- */
.hmb-app .hmb-hero { position: relative; margin-top: 42px; overflow: hidden; }
.hmb-app .hmb-hero-glow {
  position: absolute; inset: -40% -10% auto -10%; height: 460px; pointer-events: none;
  background: radial-gradient(60% 60% at 20% 20%, var(--hmb-amber-soft), transparent 70%);
}
.hmb-app .hmb-hero-inner { position: relative; max-width: 820px; }
.hmb-app .hmb-eyebrow {
  display: inline-flex; align-items: center; gap: 8px; margin: 0 0 16px;
  font-size: 0.8rem; font-weight: 700; letter-spacing: 0.08em; text-transform: uppercase;
  color: var(--hmb-amber); background: var(--hmb-amber-soft); padding: 6px 12px; border-radius: 999px;
}
.hmb-app .hmb-hero-sub { font-size: clamp(1rem, 1.6vw, 1.18rem); color: var(--hmb-ink-2); margin: 0 0 20px; max-width: 66ch; }
.hmb-app .hmb-activity { display: flex; flex-wrap: wrap; align-items: center; gap: 10px; margin: 0 0 26px; color: var(--hmb-muted); font-weight: 650; font-size: 0.92rem; }
.hmb-app .hmb-activity i { width: 5px; height: 5px; border-radius: 50%; background: var(--hmb-amber); display: inline-block; }

/* ---------- Search ---------- */
.hmb-app .hmb-search { position: relative; max-width: 560px; }
.hmb-app .hmb-search-input {
  width: 100%; height: 58px; border-radius: 14px; border: 1.5px solid var(--hmb-border-2);
  background: var(--hmb-surface); color: var(--hmb-ink); font-size: 1.05rem; padding: 0 48px 0 50px;
  box-shadow: var(--hmb-shadow); transition: border-color .2s, box-shadow .2s;
  font-family: inherit;
}
.hmb-app .hmb-search-input:focus { outline: none; border-color: var(--hmb-amber); box-shadow: 0 0 0 4px var(--hmb-amber-soft); }
.hmb-app .hmb-search-ico {
  position: absolute; left: 18px; top: 50%; transform: translateY(-50%); width: 18px; height: 18px;
  border: 2.5px solid var(--hmb-muted); border-radius: 50%;
}
.hmb-app .hmb-search-ico::after { content: ""; position: absolute; right: -6px; bottom: -6px; width: 9px; height: 2.5px; background: var(--hmb-muted); transform: rotate(45deg); border-radius: 2px; }
.hmb-app .hmb-search-clear {
  position: absolute; right: 12px; top: 50%; transform: translateY(-50%); width: 30px; height: 30px; border-radius: 50%;
  border: none; background: var(--hmb-surface-2); color: var(--hmb-muted); font-size: 20px; cursor: pointer; line-height: 1;
}
.hmb-app .hmb-privacy-note { display: flex; align-items: center; gap: 8px; margin: 18px 0 0; color: var(--hmb-muted); font-size: 0.86rem; }
.hmb-app .hmb-lock { width: 12px; height: 10px; border: 2px solid var(--hmb-green); border-radius: 2px; position: relative; margin-top: 4px; }
.hmb-app .hmb-lock::before { content: ""; position: absolute; top: -6px; left: 1px; width: 6px; height: 7px; border: 2px solid var(--hmb-green); border-bottom: none; border-radius: 5px 5px 0 0; }

/* ---------- Fields (shared) ---------- */
.hmb-app .hmb-field { display: flex; flex-direction: column; gap: 7px; }
.hmb-app .hmb-label { font-size: 0.86rem; font-weight: 650; color: var(--hmb-ink-2); }
.hmb-app .hmb-opt { color: var(--hmb-muted); font-weight: 500; font-style: normal; }
.hmb-app .hmb-input-wrap { position: relative; display: flex; align-items: center; }
.hmb-app .hmb-input, .hmb-app .hmb-select {
  width: 100%; height: 46px; border-radius: 10px; border: 1.5px solid var(--hmb-border-2);
  background: var(--hmb-surface); color: var(--hmb-ink); font-size: 1rem; padding: 0 14px; font-family: inherit;
  transition: border-color .18s, box-shadow .18s;
}
.hmb-app .hmb-input { padding-right: 52px; }
.hmb-app .hmb-select {
  appearance: none; -webkit-appearance: none; cursor: pointer;
  background-image: linear-gradient(45deg, transparent 50%, var(--hmb-muted) 50%), linear-gradient(135deg, var(--hmb-muted) 50%, transparent 50%);
  background-position: calc(100% - 18px) 20px, calc(100% - 13px) 20px; background-size: 5px 5px, 5px 5px; background-repeat: no-repeat;
  padding-right: 36px;
}
.hmb-app .hmb-input:focus, .hmb-app .hmb-select:focus { outline: none; border-color: var(--hmb-amber); box-shadow: 0 0 0 3px var(--hmb-amber-soft); }
.hmb-app .hmb-unit { position: absolute; right: 14px; color: var(--hmb-muted); font-size: 0.85rem; font-weight: 650; pointer-events: none; }
.hmb-app .hmb-err { color: #d94a3d; font-size: 0.8rem; min-height: 0; }
.hmb-app .hmb-field-err .hmb-input, .hmb-app .hmb-field-err .hmb-select { border-color: #d94a3d; }
.hmb-app[data-theme="dark"] .hmb-err { color: #ff8b7e; }

.hmb-app .hmb-chips { display: flex; flex-wrap: wrap; gap: 6px; }
.hmb-app .hmb-chip {
  border: 1px solid var(--hmb-border-2); background: var(--hmb-surface-2); color: var(--hmb-ink-2);
  padding: 5px 11px; border-radius: 999px; font-size: 0.82rem; font-weight: 600; cursor: pointer;
  font-family: inherit; transition: all .15s;
}
.hmb-app .hmb-chip:hover { border-color: var(--hmb-amber); color: var(--hmb-amber); }
.hmb-app .hmb-chip-on { background: var(--hmb-amber); border-color: var(--hmb-amber); color: #1a1206; }
.hmb-app .hmb-chip-custom { font-style: italic; }

/* ---------- Region section ---------- */
.hmb-app .hmb-region-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 18px; margin-top: 20px; }
.hmb-app .hmb-region-context {
  grid-column: 1 / -1; background: var(--hmb-surface); border: 1px solid var(--hmb-border);
  border-radius: var(--hmb-radius); padding: 20px 22px; box-shadow: var(--hmb-shadow);
}
.hmb-app .hmb-ctx-title { font-weight: 750; margin-bottom: 14px; font-size: 1.05rem; }
.hmb-app .hmb-ctx-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 14px; }
.hmb-app .hmb-ctx-item { display: flex; flex-direction: column; gap: 3px; padding: 12px 14px; background: var(--hmb-surface-2); border-radius: 10px; }
.hmb-app .hmb-ctx-item span { font-size: 0.78rem; color: var(--hmb-muted); }
.hmb-app .hmb-ctx-item strong { font-size: 1.1rem; }
.hmb-app .hmb-ctx-note { margin: 14px 0 0; font-size: 0.84rem; color: var(--hmb-muted); }

/* ---------- Quick lists ---------- */
.hmb-app .hmb-quicklists { display: grid; gap: 22px; grid-template-columns: 1fr 1fr; }
.hmb-app .hmb-chips-row, .hmb-app .hmb-scn-row { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 4px; }
.hmb-app .hmb-mini-chip {
  border: 1px solid var(--hmb-border-2); background: var(--hmb-surface); color: var(--hmb-ink-2);
  padding: 8px 14px; border-radius: 999px; font-size: 0.85rem; font-weight: 600; cursor: pointer; font-family: inherit; transition: all .15s;
}
.hmb-app .hmb-mini-chip:hover { border-color: var(--hmb-amber); color: var(--hmb-amber); transform: translateY(-1px); }

/* ---------- Category bar ---------- */
.hmb-app .hmb-catbar { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 18px; }
.hmb-app .hmb-cat {
  border: 1px solid var(--hmb-border-2); background: var(--hmb-surface); color: var(--hmb-ink-2);
  padding: 9px 16px; border-radius: 999px; font-size: 0.9rem; font-weight: 650; cursor: pointer; font-family: inherit; transition: all .15s;
}
.hmb-app .hmb-cat:hover { border-color: var(--hmb-amber); }
.hmb-app .hmb-cat-active { background: var(--hmb-ink); color: var(--hmb-bg); border-color: var(--hmb-ink); }
.hmb-app[data-theme="dark"] .hmb-cat-active { background: var(--hmb-amber); color: #1a1206; border-color: var(--hmb-amber); }

/* ---------- Scenarios ---------- */
.hmb-app .hmb-scn {
  text-align: left; border: 1px solid var(--hmb-border); background: var(--hmb-surface); border-radius: 12px;
  padding: 13px 16px; cursor: pointer; display: flex; flex-direction: column; gap: 3px; font-family: inherit;
  box-shadow: var(--hmb-shadow); transition: transform .15s, border-color .15s;
}
.hmb-app .hmb-scn:hover { transform: translateY(-2px); border-color: var(--hmb-amber); }
.hmb-app .hmb-scn-name { font-weight: 700; color: var(--hmb-ink); }
.hmb-app .hmb-scn-tool { font-size: 0.78rem; color: var(--hmb-muted); }

/* ---------- Directory / cards ---------- */
.hmb-app .hmb-dir-head { display: flex; align-items: baseline; justify-content: space-between; flex-wrap: wrap; gap: 8px; }
.hmb-app .hmb-tool-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; margin-top: 22px; }
.hmb-app .hmb-card {
  position: relative; background: var(--hmb-surface); border: 1px solid var(--hmb-border); border-radius: var(--hmb-radius);
  padding: 22px; cursor: pointer; box-shadow: var(--hmb-shadow); transition: transform .18s ease, box-shadow .18s ease, border-color .18s;
  display: flex; flex-direction: column; overflow: hidden;
}
.hmb-app .hmb-card::before { content: ""; position: absolute; left: 0; top: 0; height: 3px; width: 100%; background: linear-gradient(90deg, var(--hmb-amber), var(--hmb-amber-2)); transform: scaleX(0); transform-origin: left; transition: transform .25s ease; }
.hmb-app .hmb-card:hover { transform: translateY(-4px); box-shadow: var(--hmb-shadow-lg); border-color: var(--hmb-border-2); }
.hmb-app .hmb-card:hover::before { transform: scaleX(1); }
.hmb-app .hmb-card:focus-visible { outline: 2px solid var(--hmb-amber); outline-offset: 3px; }
.hmb-app .hmb-card-top { display: flex; align-items: center; justify-content: space-between; margin-bottom: 14px; }
.hmb-app .hmb-card-ico { display: inline-flex; }
.hmb-app .hmb-card-batt {
  width: 40px; height: 24px; border: 2.5px solid var(--hmb-amber); border-radius: 6px; position: relative; padding: 3px; display: block;
}
.hmb-app .hmb-card-batt::after { content: ""; position: absolute; right: -6px; top: 6px; width: 4px; height: 10px; background: var(--hmb-amber); border-radius: 0 2px 2px 0; }
.hmb-app .hmb-card-fill { display: block; height: 100%; width: 60%; background: linear-gradient(90deg, var(--hmb-amber), var(--hmb-amber-2)); border-radius: 2px; }
.hmb-app .hmb-card:hover .hmb-card-fill { width: 90%; transition: width .4s ease; }
.hmb-app .hmb-fav {
  border: none; background: none; color: var(--hmb-border-2); font-size: 1.35rem; cursor: pointer; line-height: 1; padding: 2px; transition: transform .15s, color .15s;
}
.hmb-app .hmb-fav:hover { transform: scale(1.15); color: var(--hmb-amber-2); }
.hmb-app .hmb-fav-on { color: var(--hmb-amber); }
.hmb-app .hmb-card-cat { font-size: 0.72rem; font-weight: 700; letter-spacing: 0.05em; text-transform: uppercase; color: var(--hmb-amber); }
.hmb-app .hmb-card-title { font-size: 1.12rem; font-weight: 750; margin: 6px 0 8px; letter-spacing: -0.01em; }
.hmb-app .hmb-card-desc { font-size: 0.9rem; color: var(--hmb-muted); margin: 0 0 16px; flex: 1; }
.hmb-app .hmb-card-open { font-size: 0.88rem; font-weight: 700; color: var(--hmb-ink); transition: color .15s; }
.hmb-app .hmb-card:hover .hmb-card-open { color: var(--hmb-amber); }

.hmb-app .hmb-empty { text-align: center; padding: 48px 20px; color: var(--hmb-muted); background: var(--hmb-surface); border: 1px dashed var(--hmb-border-2); border-radius: var(--hmb-radius); margin-top: 22px; }

/* ---------- Reference / examples ---------- */
.hmb-app .hmb-ref-grid, .hmb-app .hmb-ex-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 16px; margin-top: 22px; }
.hmb-app .hmb-ex-grid { grid-template-columns: repeat(4, 1fr); }
.hmb-app .hmb-ref-card, .hmb-app .hmb-ex-card {
  background: var(--hmb-surface); border: 1px solid var(--hmb-border); border-radius: var(--hmb-radius-sm); padding: 18px; box-shadow: var(--hmb-shadow);
}
.hmb-app .hmb-ref-card p, .hmb-app .hmb-ex-card p { margin: 0; font-size: 0.9rem; color: var(--hmb-muted); }
.hmb-app .hmb-ex-card strong { color: var(--hmb-amber); }

/* ---------- Chemistry table ---------- */
.hmb-app .hmb-table-wrap { margin-top: 22px; overflow-x: auto; border: 1px solid var(--hmb-border); border-radius: var(--hmb-radius); background: var(--hmb-surface); box-shadow: var(--hmb-shadow); }
.hmb-app .hmb-table { width: 100%; border-collapse: collapse; min-width: 720px; }
.hmb-app .hmb-table th, .hmb-app .hmb-table td { text-align: left; padding: 13px 16px; font-size: 0.9rem; border-bottom: 1px solid var(--hmb-border); }
.hmb-app .hmb-table th { background: var(--hmb-surface-2); font-weight: 700; color: var(--hmb-ink-2); position: sticky; top: 0; }
.hmb-app .hmb-table tr:last-child td { border-bottom: none; }
.hmb-app .hmb-table td:first-child { font-weight: 650; }
.hmb-app .hmb-safety {
  margin-top: 18px; padding: 16px 18px; background: var(--hmb-amber-soft); border: 1px solid color-mix(in srgb, var(--hmb-amber) 40%, transparent);
  border-radius: var(--hmb-radius-sm); font-size: 0.9rem; color: var(--hmb-ink-2);
}

/* ---------- How to use ---------- */
.hmb-app .hmb-steps { list-style: none; padding: 0; margin: 24px 0 0; display: grid; grid-template-columns: repeat(2, 1fr); gap: 16px; }
.hmb-app .hmb-step { display: flex; gap: 14px; background: var(--hmb-surface); border: 1px solid var(--hmb-border); border-radius: var(--hmb-radius-sm); padding: 18px; box-shadow: var(--hmb-shadow); }
.hmb-app .hmb-step-n { flex: none; width: 34px; height: 34px; border-radius: 50%; background: var(--hmb-amber); color: #1a1206; font-weight: 800; display: grid; place-items: center; }
.hmb-app .hmb-step p { margin: 0; font-size: 0.9rem; color: var(--hmb-muted); }

/* ---------- FAQ accordion ---------- */
.hmb-app .hmb-accordion { margin-top: 22px; border: 1px solid var(--hmb-border); border-radius: var(--hmb-radius); overflow: hidden; background: var(--hmb-surface); box-shadow: var(--hmb-shadow); }
.hmb-app .hmb-acc-item { border-bottom: 1px solid var(--hmb-border); }
.hmb-app .hmb-acc-item:last-child { border-bottom: none; }
.hmb-app .hmb-acc-btn {
  width: 100%; text-align: left; background: none; border: none; cursor: pointer; font-family: inherit;
  padding: 18px 22px; display: flex; align-items: center; justify-content: space-between; gap: 16px;
  font-size: 1rem; font-weight: 650; color: var(--hmb-ink);
}
.hmb-app .hmb-acc-btn:hover { color: var(--hmb-amber); }
.hmb-app .hmb-acc-ico { flex: none; width: 16px; height: 16px; position: relative; }
.hmb-app .hmb-acc-ico::before, .hmb-app .hmb-acc-ico::after { content: ""; position: absolute; background: var(--hmb-amber); border-radius: 2px; transition: transform .25s; }
.hmb-app .hmb-acc-ico::before { top: 7px; left: 0; width: 16px; height: 2px; }
.hmb-app .hmb-acc-ico::after { top: 0; left: 7px; width: 2px; height: 16px; }
.hmb-app .hmb-acc-open .hmb-acc-ico::after { transform: scaleY(0); }
.hmb-app .hmb-acc-panel { max-height: 0; overflow: hidden; transition: max-height .28s ease; }
.hmb-app .hmb-acc-panel p { margin: 0; padding: 0 22px 20px; color: var(--hmb-muted); font-size: 0.94rem; }

/* ---------- Footer ---------- */
.hmb-app .hmb-footer { margin-top: 80px; border-top: 1px solid var(--hmb-border); padding: 40px 0; text-align: center; background: var(--hmb-surface); }
.hmb-app .hmb-footer-brand { font-weight: 750; margin: 0 0 6px; }
.hmb-app .hmb-footer-sub { color: var(--hmb-amber); font-weight: 650; margin: 0 0 10px; letter-spacing: 0.03em; }
.hmb-app .hmb-footer-note { color: var(--hmb-muted); font-size: 0.85rem; margin: 0; }

/* ---------- Buttons ---------- */
.hmb-app .hmb-btn { border: 1px solid var(--hmb-border-2); background: var(--hmb-surface-2); color: var(--hmb-ink); font-family: inherit; font-weight: 700; cursor: pointer; border-radius: 10px; padding: 12px 20px; font-size: 0.95rem; transition: transform .12s, box-shadow .15s, background-color .15s; }
.hmb-app .hmb-btn:active { transform: translateY(1px) scale(.99); }
.hmb-app .hmb-btn-primary { background: var(--hmb-amber); border-color: var(--hmb-amber); color: #1a1206; box-shadow: 0 6px 18px var(--hmb-amber-soft); }
.hmb-app .hmb-btn-primary:hover { background: var(--hmb-amber-2); border-color: var(--hmb-amber-2); }
.hmb-app .hmb-btn-ghost { background: transparent; }
.hmb-app .hmb-btn-sm { padding: 9px 15px; font-size: 0.85rem; }

/* ---------- Modal ---------- */
.hmb-app .hmb-modal-overlay {
  position: fixed; inset: 0; z-index: 100; background: rgba(10, 12, 16, 0.55);
  backdrop-filter: blur(4px); -webkit-backdrop-filter: blur(4px);
  display: flex; align-items: flex-start; justify-content: center; padding: 40px 18px;
  opacity: 0; transition: opacity .25s ease; overflow-y: auto;
}
.hmb-app .hmb-modal-overlay[hidden] { display: none !important; }
.hmb-app .hmb-modal-visible { opacity: 1; }
.hmb-app .hmb-modal {
  position: relative; width: 100%; max-width: 720px; background: var(--hmb-surface);
  border: 1px solid var(--hmb-border); border-radius: 20px; box-shadow: var(--hmb-shadow-lg);
  padding: 34px; transform: translateY(16px) scale(.98); transition: transform .28s ease; margin: auto 0;
}
.hmb-app .hmb-modal-visible .hmb-modal { transform: translateY(0) scale(1); }
.hmb-app .hmb-modal-close {
  position: absolute; top: 16px; right: 16px; width: 38px; height: 38px; border-radius: 50%;
  border: 1px solid var(--hmb-border); background: var(--hmb-surface-2); color: var(--hmb-ink); font-size: 22px; line-height: 1; cursor: pointer; z-index: 2;
}
.hmb-app .hmb-modal-close:hover { border-color: var(--hmb-amber); color: var(--hmb-amber); }
.hmb-app .hmb-modal-cat { font-size: 0.72rem; font-weight: 700; letter-spacing: 0.06em; text-transform: uppercase; color: var(--hmb-amber); }
.hmb-app .hmb-modal-title { font-size: 1.55rem; font-weight: 800; letter-spacing: -0.01em; margin: 6px 40px 6px 0; }
.hmb-app .hmb-modal-desc { color: var(--hmb-muted); margin: 0 0 24px; font-size: 0.95rem; }

.hmb-app .hmb-form { display: grid; grid-template-columns: repeat(2, 1fr); gap: 18px; }
.hmb-app .hmb-form-actions { display: flex; gap: 12px; margin-top: 22px; }
.hmb-app .hmb-form-actions .hmb-btn-primary { flex: 1; }

/* ---------- Result ---------- */
.hmb-app .hmb-result { margin-top: 26px; }
.hmb-app .hmb-result-empty { padding: 30px; text-align: center; color: var(--hmb-muted); background: var(--hmb-surface-2); border-radius: var(--hmb-radius-sm); border: 1px dashed var(--hmb-border-2); }
.hmb-app .hmb-result-warn { color: #d94a3d; border-color: #d94a3d; background: color-mix(in srgb, #d94a3d 8%, var(--hmb-surface)); }
.hmb-app .hmb-primary {
  background: linear-gradient(135deg, var(--hmb-ink), color-mix(in srgb, var(--hmb-ink) 82%, var(--hmb-amber)));
  color: #fff; border-radius: var(--hmb-radius); padding: 24px 26px; display: flex; flex-direction: column; gap: 4px;
  animation: hmb-reveal .4s ease both;
}
.hmb-app[data-theme="dark"] .hmb-primary { background: linear-gradient(135deg, #23272f, color-mix(in srgb, #23272f 70%, var(--hmb-amber))); }
.hmb-app .hmb-primary-label { font-size: 0.85rem; opacity: .8; font-weight: 600; }
.hmb-app .hmb-primary-value { font-size: clamp(1.8rem, 5vw, 2.6rem); font-weight: 850; letter-spacing: -0.02em; line-height: 1.05; }
.hmb-app .hmb-primary-sub { font-size: 0.92rem; opacity: .85; }
@keyframes hmb-reveal { from { opacity: 0; transform: translateY(8px); } to { opacity: 1; transform: none; } }

.hmb-app .hmb-result-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 12px; margin-top: 16px; }
.hmb-app .hmb-ritem { display: flex; flex-direction: column; gap: 2px; padding: 13px 15px; background: var(--hmb-surface-2); border-radius: 10px; border: 1px solid var(--hmb-border); }
.hmb-app .hmb-rlabel { font-size: 0.78rem; color: var(--hmb-muted); }
.hmb-app .hmb-rvalue { font-size: 1.05rem; font-weight: 750; }
.hmb-app .hmb-interp { margin: 16px 0 0; font-size: 0.92rem; color: var(--hmb-ink-2); }

.hmb-app .hmb-details { margin-top: 14px; border: 1px solid var(--hmb-border); border-radius: 10px; background: var(--hmb-surface-2); overflow: hidden; }
.hmb-app .hmb-details summary { cursor: pointer; padding: 12px 15px; font-weight: 650; font-size: 0.9rem; list-style: none; }
.hmb-app .hmb-details summary::-webkit-details-marker { display: none; }
.hmb-app .hmb-details summary::before { content: "▸ "; color: var(--hmb-amber); }
.hmb-app .hmb-details[open] summary::before { content: "▾ "; }
.hmb-app .hmb-formula { padding: 0 15px 14px; font-size: 0.86rem; color: var(--hmb-ink-2); font-variant-numeric: tabular-nums; }
.hmb-app .hmb-formula div { padding: 3px 0; border-bottom: 1px dashed var(--hmb-border); }
.hmb-app .hmb-formula div:last-child { border-bottom: none; }
.hmb-app .hmb-assume { margin: 0; padding: 0 15px 14px 32px; font-size: 0.86rem; color: var(--hmb-muted); }

.hmb-app .hmb-note { display: flex; gap: 10px; margin: 16px 0 0; padding: 13px 15px; background: var(--hmb-amber-soft); border-radius: 10px; font-size: 0.84rem; color: var(--hmb-ink-2); }
.hmb-app .hmb-note-i { flex: none; width: 18px; height: 18px; border-radius: 50%; background: var(--hmb-amber); color: #1a1206; font-weight: 800; font-size: 11px; display: grid; place-items: center; font-style: normal; margin-top: 1px; }

.hmb-app .hmb-actions { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 20px; padding-top: 20px; border-top: 1px solid var(--hmb-border); }
.hmb-app .hmb-related { margin-top: 24px; padding-top: 20px; border-top: 1px solid var(--hmb-border); }
.hmb-app .hmb-related-h { font-size: 0.8rem; font-weight: 700; text-transform: uppercase; letter-spacing: 0.05em; color: var(--hmb-muted); }
.hmb-app .hmb-related-row { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 10px; }

/* ---------- Visuals ---------- */
.hmb-app .hmb-vis { margin-top: 18px; }
.hmb-app .hmb-gauge { position: relative; height: 42px; border: 3px solid var(--hmb-ink-2); border-radius: 8px; padding: 4px; background: var(--hmb-surface-2); }
.hmb-app .hmb-gauge-cap { position: absolute; right: -9px; top: 12px; width: 6px; height: 16px; background: var(--hmb-ink-2); border-radius: 0 3px 3px 0; }
.hmb-app .hmb-gauge-fill { display: block; height: 100%; background: linear-gradient(90deg, var(--hmb-amber), var(--hmb-amber-2)); border-radius: 4px; transition: width .6s cubic-bezier(.2,.7,.2,1); position: relative; overflow: hidden; }
.hmb-app .hmb-gauge-fill::after { content: ""; position: absolute; inset: 0; background: repeating-linear-gradient(90deg, transparent, transparent 12px, rgba(255,255,255,.18) 12px, rgba(255,255,255,.18) 24px); }
.hmb-app .hmb-vis-label { margin-top: 8px; font-size: 0.86rem; color: var(--hmb-muted); }

.hmb-app .hmb-vis-meter { display: flex; justify-content: center; padding: 6px 0; }
.hmb-app .hmb-meter { width: 130px; height: 130px; border-radius: 50%; display: grid; place-items: center; background: conic-gradient(var(--hmb-amber) var(--deg), var(--hmb-border) 0); position: relative; }
.hmb-app .hmb-meter::before { content: ""; position: absolute; inset: 12px; background: var(--hmb-surface); border-radius: 50%; }
.hmb-app .hmb-meter-num { position: relative; font-size: 1.5rem; font-weight: 800; }

.hmb-app .hmb-vis-bars { display: flex; flex-direction: column; gap: 12px; }
.hmb-app .hmb-bar-row { display: grid; grid-template-columns: 1fr 2fr auto; gap: 12px; align-items: center; }
.hmb-app .hmb-bar-label { font-size: 0.85rem; color: var(--hmb-muted); }
.hmb-app .hmb-bar-track { height: 16px; background: var(--hmb-surface-2); border-radius: 8px; overflow: hidden; border: 1px solid var(--hmb-border); }
.hmb-app .hmb-bar-fill { display: block; height: 100%; background: linear-gradient(90deg, var(--hmb-amber), var(--hmb-amber-2)); transition: width .6s ease; }
.hmb-app .hmb-bar-val { font-weight: 700; font-size: 0.85rem; white-space: nowrap; }

.hmb-app .hmb-vis-config { background: var(--hmb-surface-2); border: 1px solid var(--hmb-border); border-radius: 12px; padding: 16px; }
.hmb-app .hmb-cfg-title { font-size: 0.85rem; font-weight: 700; color: var(--hmb-muted); margin-bottom: 12px; }
.hmb-app .hmb-cfg-series, .hmb-app .hmb-cfg-grid { display: flex; flex-wrap: wrap; gap: 8px; align-items: center; margin-bottom: 8px; }
.hmb-app .hmb-cfg-grid { flex-direction: column; align-items: flex-start; }
.hmb-app .hmb-cell { display: inline-flex; flex-direction: column; align-items: center; gap: 3px; }
.hmb-app .hmb-cell-batt { width: 30px; height: 40px; border: 2px solid var(--hmb-amber); border-radius: 4px; background: linear-gradient(180deg, transparent 40%, var(--hmb-amber-soft) 40%); position: relative; }
.hmb-app .hmb-cell-batt::before { content: ""; position: absolute; top: -4px; left: 9px; width: 10px; height: 3px; background: var(--hmb-amber); border-radius: 2px 2px 0 0; }
.hmb-app .hmb-cell-lb { font-size: 0.68rem; color: var(--hmb-muted); }
.hmb-app .hmb-cell-more { font-size: 0.8rem; font-weight: 700; color: var(--hmb-amber); align-self: center; }

/* ---------- Toast ---------- */
.hmb-app .hmb-toast {
  position: fixed; bottom: 26px; left: 50%; transform: translateX(-50%) translateY(20px); z-index: 200;
  background: var(--hmb-ink); color: var(--hmb-bg); padding: 13px 22px; border-radius: 999px; font-weight: 650; font-size: 0.9rem;
  box-shadow: var(--hmb-shadow-lg); opacity: 0; transition: opacity .25s, transform .25s;
}
.hmb-app[data-theme="dark"] .hmb-toast { background: var(--hmb-amber); color: #1a1206; }
.hmb-app .hmb-toast-show { opacity: 1; transform: translateX(-50%) translateY(0); }

/* ---------- Print region (hidden on screen) ---------- */
.hmb-app .hmb-print-region { display: none; }

/* ---------- Responsive ---------- */
@media (max-width: 1024px) {
  .hmb-app .hmb-tool-grid { grid-template-columns: repeat(2, 1fr); }
  .hmb-app .hmb-ref-grid, .hmb-app .hmb-ex-grid { grid-template-columns: repeat(2, 1fr); }
  .hmb-app .hmb-ctx-grid { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 720px) {
  .hmb-app .hmb-shell { padding: 0 16px; }
  .hmb-app section { margin-top: 46px; }
  .hmb-app .hmb-country-select { display: none; }
  .hmb-app .hmb-region-grid { grid-template-columns: 1fr; }
  .hmb-app .hmb-quicklists { grid-template-columns: 1fr; }
  .hmb-app .hmb-steps { grid-template-columns: 1fr; }
  .hmb-app .hmb-form { grid-template-columns: 1fr; }
  .hmb-app .hmb-modal { padding: 26px 20px; border-radius: 16px; }
  .hmb-app .hmb-modal-overlay { padding: 16px 10px; }
  .hmb-app .hmb-result-grid { grid-template-columns: 1fr; }
  .hmb-app .hmb-primary { padding: 20px; }
  .hmb-app .hmb-bar-row { grid-template-columns: 1fr; gap: 4px; }
  .hmb-app .hmb-bar-val { justify-self: start; }
}
@media (max-width: 480px) {
  .hmb-app .hmb-tool-grid { grid-template-columns: 1fr; }
  .hmb-app .hmb-ref-grid, .hmb-app .hmb-ex-grid, .hmb-app .hmb-ctx-grid { grid-template-columns: 1fr; }
  .hmb-app .hmb-brand-text { font-size: 1rem; }
  .hmb-app .hmb-actions .hmb-btn { flex: 1 1 auto; }
}

/* ---------- Focus visibility ---------- */
.hmb-app a:focus-visible, .hmb-app button:focus-visible, .hmb-app input:focus-visible, .hmb-app select:focus-visible, .hmb-app summary:focus-visible {
  outline: 2px solid var(--hmb-amber); outline-offset: 2px;
}

/* ---------- Reduced motion ---------- */
@media (prefers-reduced-motion: reduce) {
  .hmb-app *, .hmb-app *::before, .hmb-app *::after { animation-duration: .001ms !important; animation-iteration-count: 1 !important; transition-duration: .001ms !important; }
}

/* =====================================================================
   PRINT STYLES — clean report only
   ===================================================================== */
@media print {
  body { background: #fff; }
  .hmb-app .hmb-topbar, .hmb-app .hmb-hero, .hmb-app .hmb-region, .hmb-app .hmb-quicklists,
  .hmb-app .hmb-categories, .hmb-app .hmb-scenarios, .hmb-app .hmb-directory, .hmb-app .hmb-reference,
  .hmb-app .hmb-chem, .hmb-app .hmb-examples, .hmb-app .hmb-howto, .hmb-app .hmb-faq, .hmb-app .hmb-footer,
  .hmb-app .hmb-modal-overlay, .hmb-app .hmb-toast { display: none !important; }

  .hmb-app.hmb-printing .hmb-print-region { display: block !important; }
  .hmb-app .hmb-print-region { color: #000; font-family: var(--hmb-font); }
  .hmb-app .hmb-print-doc { padding: 20px; }
  .hmb-app .hmb-print-doc h1 { font-size: 20px; margin: 0 0 4px; color: #b06a00; }
  .hmb-app .hmb-print-doc h2 { font-size: 16px; margin: 0 0 16px; }
  .hmb-app .hmb-print-doc h3 { font-size: 13px; margin: 16px 0 6px; }
  .hmb-app .hmb-print-primary { font-size: 15px; margin: 0 0 14px; }
  .hmb-app .hmb-print-doc table { width: 100%; border-collapse: collapse; margin: 8px 0; }
  .hmb-app .hmb-print-doc td { border: 1px solid #ccc; padding: 6px 10px; font-size: 12px; }
  .hmb-app .hmb-print-doc td:first-child { color: #555; width: 50%; }
  .hmb-app .hmb-print-doc pre { background: #f4f4f4; padding: 10px; font-size: 11px; white-space: pre-wrap; border-radius: 4px; }
  .hmb-app .hmb-print-note { font-size: 11px; color: #666; }
  .hmb-app .hmb-print-foot { margin-top: 20px; font-size: 11px; color: #888; border-top: 1px solid #ddd; padding-top: 8px; }
}