/* ==========================================================================
   Base + components
   ========================================================================== */

*, *::before, *::after { box-sizing: border-box; -webkit-tap-highlight-color: transparent; }

html, body {
  margin: 0;
  padding: 0;
  background: var(--page-bg);
  color: var(--text);
  font-family: var(--font-body);
  -webkit-font-smoothing: antialiased;
}

body { overscroll-behavior-y: contain; }

button, input, select { font-family: var(--font-body); }
button { touch-action: manipulation; cursor: pointer; }

h1, h2, h3, h4 { margin: 0; font-weight: 700; color: var(--primary-dark); }
p { margin: 0; }

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

/* ---------- App shell ---------- */

#app {
  max-width: 1100px;
  margin: 0 auto;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

.app-header {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 16px 20px;
  background: var(--surface);
  border-bottom: 1px solid var(--grey-line);
  position: sticky;
  top: 0;
  z-index: 30;
}

.app-header__logo {
  width: 40px;
  height: 40px;
  border-radius: var(--radius-sm);
  background: var(--primary);
  color: var(--white);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.app-header__title { font-size: 1.05rem; font-weight: 700; color: var(--primary-dark); line-height: 1.15; }
.app-header__subtitle { font-size: 0.76rem; color: var(--text-soft); }

.app-header__back {
  background: none;
  border: none;
  color: var(--primary-dark);
  padding: 8px;
  border-radius: var(--radius-sm);
  display: none;
  align-items: center;
}
.app-header__back.show { display: flex; }
.app-header__back:hover { background: var(--primary-pale); }

main#route-outlet {
  flex: 1;
  padding: 20px 20px 100px;
}

/* ---------- Loading splash ---------- */

#splash {
  position: fixed;
  inset: 0;
  background: var(--primary-dark);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 14px;
  color: var(--white);
  z-index: 100;
  transition: opacity var(--transition-med), visibility var(--transition-med);
}
#splash.hide { opacity: 0; visibility: hidden; pointer-events: none; }
#splash svg { animation: pulse 1.2s ease-in-out infinite; }
#splash span { font-size: 0.9rem; opacity: 0.85; letter-spacing: 0.02em; }
@keyframes pulse { 0%, 100% { transform: scale(1); opacity: 1; } 50% { transform: scale(1.08); opacity: 0.75; } }

/* ---------- Screens / routing ---------- */

.screen { display: none; animation: fade-in var(--transition-med); }
.screen.active { display: block; }
@keyframes fade-in { from { opacity: 0; transform: translateY(6px); } to { opacity: 1; transform: translateY(0); } }

.screen-title { font-size: 1.3rem; margin-bottom: 4px; }
.screen-subtitle { font-size: 0.85rem; color: var(--text-soft); margin-bottom: 20px; }

/* ---------- Cards ---------- */

.card {
  background: var(--surface);
  border: 1px solid var(--grey-line);
  border-radius: var(--radius);
  box-shadow: var(--shadow-sm);
  padding: 20px;
}

.card + .card { margin-top: 16px; }

.install-banner { border-color: var(--primary-light); background: var(--surface-alt); }

/* ---------- Buttons ---------- */

.btn {
  font-weight: 600;
  font-size: 0.92rem;
  padding: 13px 20px;
  border-radius: var(--radius-sm);
  border: none;
  cursor: pointer;
  transition: transform 0.1s ease, background var(--transition-fast), box-shadow var(--transition-fast);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  min-height: 44px;
}
.btn:active { transform: scale(0.97); }
.btn:focus-visible { outline: 2px solid var(--primary-dark); outline-offset: 2px; }

.btn--primary { background: var(--primary); color: var(--white); box-shadow: 0 4px 14px rgba(46, 125, 50, 0.3); }
.btn--primary:hover { background: var(--primary-dark); }

.btn--secondary { background: var(--primary-pale); color: var(--primary-dark); border: 1.5px solid var(--primary-light); }
.btn--secondary:hover { filter: brightness(0.98); }

.btn--ghost { background: transparent; color: var(--primary); border: 1px dashed var(--primary-light); }
.btn--ghost:hover { background: var(--primary-pale); }

.btn--danger { background: var(--critical-bg); color: var(--critical); }
.btn--danger:hover { filter: brightness(0.95); }

.btn--block { width: 100%; }
.btn--icon { padding: 10px; min-width: 44px; }

.btn:disabled { opacity: 0.5; cursor: not-allowed; transform: none; }

.action-bar { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 20px; }
.action-bar .btn { flex: 1 1 140px; }

/* ---------- Forms / fields ---------- */

.field { display: flex; flex-direction: column; gap: 6px; margin-bottom: 16px; }
.field:last-child { margin-bottom: 0; }
.field__label { font-size: 0.82rem; font-weight: 600; color: var(--primary-dark); }
.field__label .optional { font-weight: 400; color: var(--grey-mid); }

.field input, .field select {
  font-family: var(--font-mono);
  font-size: 1rem;
  padding: 12px 14px;
  border: 1.5px solid var(--grey-line);
  border-radius: var(--radius-sm);
  background: var(--page-bg);
  color: var(--text);
  width: 100%;
  min-height: 44px;
}
.field select { font-family: var(--font-body); }
.field input:focus, .field select:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 3px var(--primary-pale);
}
.field input.error { border-color: var(--critical); }
.field__error { font-size: 0.76rem; color: var(--critical); min-height: 1em; }
.field__hint { font-size: 0.74rem; color: var(--text-soft); }

.field-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 0 14px; }
@media (max-width: 420px) { .field-grid { grid-template-columns: 1fr; } }

/* ---------- Calculator grid (hub) ---------- */

.calc-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(160px, 1fr));
  gap: 14px;
}

.calc-tile {
  background: var(--surface);
  border: 1px solid var(--grey-line);
  border-radius: var(--radius);
  box-shadow: var(--shadow-sm);
  padding: 18px 16px;
  display: flex;
  flex-direction: column;
  gap: 10px;
  text-align: left;
  cursor: pointer;
  transition: transform var(--transition-fast), box-shadow var(--transition-fast);
}
.calc-tile:hover { box-shadow: var(--shadow-md); transform: translateY(-2px); }
.calc-tile__icon {
  width: 44px; height: 44px;
  border-radius: var(--radius-sm);
  background: var(--primary-pale);
  color: var(--primary-dark);
  display: flex; align-items: center; justify-content: center;
}
.calc-tile__name { font-size: 0.92rem; font-weight: 700; color: var(--primary-dark); }
.calc-tile__desc { font-size: 0.76rem; color: var(--text-soft); line-height: 1.35; }
.calc-tile__fav {
  align-self: flex-end;
  margin-top: -34px;
  background: none; border: none; color: var(--grey-mid); padding: 4px;
}
.calc-tile__fav.is-fav { color: var(--warning); }

/* ---------- Results ---------- */

.status-banner {
  display: flex; align-items: center; gap: 12px;
  padding: 14px 16px; border-radius: var(--radius); margin-bottom: 18px;
}
.status-banner strong { display: block; font-size: 1.02rem; }
.status-banner span.ref { font-size: 0.8rem; opacity: 0.85; }
.status-banner--good { background: var(--success-bg); color: var(--primary-dark); }
.status-banner--warn { background: var(--warning-bg); color: #8A5100; }
.status-banner--bad { background: var(--critical-bg); color: #7A2C2C; }

.results-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 12px;
  margin-bottom: 4px;
}
@media (min-width: 480px) { .results-grid { grid-template-columns: repeat(auto-fit, minmax(150px, 1fr)); } }

.metric-card {
  border-radius: var(--radius);
  padding: 16px 14px;
  background: var(--surface-alt);
  color: var(--primary-dark);
  box-shadow: var(--shadow-sm);
  display: flex; flex-direction: column; gap: 6px;
}
.metric-card__label { font-size: 0.72rem; font-weight: 600; text-transform: uppercase; letter-spacing: 0.04em; opacity: 0.85; }
.metric-card__value { font-family: var(--font-mono); font-size: 1.15rem; font-weight: 700; word-break: break-word; }

.breakdown { background: var(--surface-alt); border-radius: var(--radius); padding: 18px; margin-top: 16px; }
.breakdown__title { font-size: 0.95rem; margin-bottom: 12px; }
.breakdown__row { display: grid; grid-template-columns: 110px 1fr auto; align-items: center; gap: 10px; margin-bottom: 10px; }
.breakdown__label { font-size: 0.78rem; color: var(--text-soft); }
.breakdown__track { background: var(--primary-pale); border-radius: 6px; height: 8px; overflow: hidden; }
.breakdown__bar { background: var(--primary); height: 100%; border-radius: 6px; transition: width 0.4s ease; }
.breakdown__value { font-family: var(--font-mono); font-size: 0.78rem; color: var(--primary-dark); white-space: nowrap; }

/* ---------- Toast ---------- */

.toast {
  position: fixed;
  bottom: calc(84px + env(safe-area-inset-bottom));
  left: 50%;
  transform: translate(-50%, 16px);
  background: var(--primary-dark);
  color: var(--white);
  padding: 12px 20px;
  border-radius: var(--radius-pill);
  font-size: 0.86rem;
  font-weight: 600;
  opacity: 0; visibility: hidden;
  transition: all var(--transition-med);
  z-index: 90;
  box-shadow: var(--shadow-md);
  max-width: 90vw; text-align: center;
}
.toast.show { opacity: 1; visibility: visible; transform: translate(-50%, 0); }
.toast.error { background: var(--critical); }
.toast.warn { background: var(--warning); }

/* ---------- Empty states ---------- */

.empty-state { text-align: center; padding: 48px 16px; color: var(--text-soft); display: flex; flex-direction: column; align-items: center; gap: 12px; }
.empty-state svg { color: var(--primary-light); }
.empty-state p { margin: 0; }
.empty-state .hint { font-size: 0.8rem; }

/* ---------- History / list rows ---------- */

.list-toolbar { display: flex; flex-wrap: wrap; gap: 10px; margin-bottom: 16px; align-items: center; }
.list-toolbar input[type="search"], .list-toolbar select {
  padding: 10px 14px; border-radius: var(--radius-sm); border: 1.5px solid var(--grey-line);
  background: var(--surface); color: var(--text); font-size: 0.88rem; min-height: 42px;
}
.list-toolbar input[type="search"] { flex: 1 1 200px; }

.list-item {
  display: flex; align-items: center; gap: 12px;
  background: var(--surface); border: 1px solid var(--grey-line); border-radius: var(--radius-sm);
  padding: 12px 14px; margin-bottom: 10px;
}
.list-item__badge {
  width: 38px; height: 38px; border-radius: var(--radius-sm);
  background: var(--primary-pale); color: var(--primary-dark);
  display: flex; align-items: center; justify-content: center; flex-shrink: 0;
}
.list-item__info { flex: 1; min-width: 0; display: flex; flex-direction: column; gap: 2px; }
.list-item__info strong { font-size: 0.9rem; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.list-item__info span { font-size: 0.72rem; color: var(--text-soft); }
.list-item__value { font-family: var(--font-mono); font-size: 0.82rem; font-weight: 700; color: var(--primary-dark); white-space: nowrap; }
.list-item__actions { display: flex; gap: 2px; flex-shrink: 0; }
.list-item input[type="checkbox"] { width: 18px; height: 18px; flex-shrink: 0; }

.btn-icon-sm { background: none; border: none; padding: 8px; border-radius: 8px; color: var(--text-soft); display: flex; }
.btn-icon-sm:hover { background: var(--primary-pale); color: var(--primary-dark); }
.btn-icon-sm.is-fav { color: var(--warning); }

/* ---------- Reports table ---------- */

.table-wrap { overflow-x: auto; border-radius: var(--radius); border: 1px solid var(--grey-line); }
table.report-table { width: 100%; border-collapse: collapse; font-size: 0.84rem; background: var(--surface); }
table.report-table th, table.report-table td { padding: 12px 14px; text-align: left; white-space: nowrap; border-bottom: 1px solid var(--grey-line); }
table.report-table th { background: var(--surface-alt); color: var(--primary-dark); font-weight: 700; position: sticky; top: 0; }
table.report-table tr:last-child td { border-bottom: none; }

.summary-strip { display: grid; grid-template-columns: repeat(auto-fit, minmax(140px, 1fr)); gap: 12px; margin-bottom: 16px; }

/* ---------- Modal / confirm ---------- */

.overlay {
  position: fixed; inset: 0; background: rgba(16, 22, 15, 0.5);
  opacity: 0; visibility: hidden; transition: opacity var(--transition-med);
  z-index: 60; display: flex; align-items: center; justify-content: center; padding: 20px;
}
.overlay.show { opacity: 1; visibility: visible; }
.modal { background: var(--surface); border-radius: var(--radius); padding: 22px; max-width: 380px; width: 100%; box-shadow: var(--shadow-md); }
.modal h3 { margin-bottom: 10px; }
.modal p { color: var(--text-soft); font-size: 0.88rem; margin-bottom: 18px; }
.modal .action-bar { margin-top: 0; }

/* ---------- Badges ---------- */

.badge { display: inline-flex; align-items: center; padding: 3px 10px; border-radius: var(--radius-pill); font-size: 0.7rem; font-weight: 700; }
.badge--good { background: var(--success-bg); color: var(--primary-dark); }
.badge--warn { background: var(--warning-bg); color: #8A5100; }
.badge--bad { background: var(--critical-bg); color: #7A2C2C; }

/* ---------- Utility ---------- */

.stack { display: flex; flex-direction: column; gap: 12px; }
.row { display: flex; align-items: center; gap: 10px; }
.row.between { justify-content: space-between; }
.mt-0 { margin-top: 0 !important; }
.text-soft { color: var(--text-soft); }
.sr-only { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0,0,0,0); white-space: nowrap; }

@media (prefers-reduced-motion: reduce) {
  * { animation-duration: 0.001ms !important; transition-duration: 0.001ms !important; }
}