/* ==========================================================================
   Dewpoint — mobile app-shell calculator
   Layout scaffolding + interactive states for dewpoint-app.html. Most
   data-driven styling (active colors, chart coordinates, disabled opacity)
   is set inline by assets/js/dewpoint-app.js; this file covers structure,
   hover/focus states, and responsiveness that inline styles can't.
   ========================================================================== */

.dpapp-wrap {
  padding: var(--space-7) var(--space-5);
  display: flex;
  justify-content: center;
  background:
    linear-gradient(var(--color-paper-dim) 1px, transparent 1px),
    linear-gradient(90deg, var(--color-paper-dim) 1px, transparent 1px);
  background-size: 32px 32px;
}

.dpapp-shell {
  width: 100%;
  max-width: 440px;
  height: min(760px, 78vh);
  min-height: 560px;
  display: flex;
  flex-direction: column;
  position: relative;
  background: var(--color-paper);
  border: 1px solid var(--color-graphite);
  border-radius: 10px;
  overflow: hidden;
  box-shadow: 0 24px 48px rgba(27, 31, 35, 0.14), 0 0 0 1px rgba(27, 31, 35, 0.04);
}

/* ---- Splash ---- */
.dpapp-splash {
  position: absolute;
  inset: 0;
  z-index: 100;
  background: var(--color-paper);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 2rem;
  cursor: pointer;
  text-align: center;
}
.dpapp-splash-icon {
  width: 64px; height: 64px;
  border: 1.5px solid var(--color-accent);
  display: flex; align-items: center; justify-content: center;
  margin-bottom: 1.5rem;
}
.dpapp-splash-kicker {
  font-family: var(--font-mono);
  font-size: 0.6875rem; letter-spacing: 0.08em;
  color: var(--color-accent); margin-bottom: 0.75rem;
}
.dpapp-splash-title {
  font-size: 1.375rem; font-weight: 700;
  color: var(--color-charcoal); line-height: 1.25; margin-bottom: 1.5rem;
}
.dpapp-splash-meta {
  display: flex; align-items: center; gap: 0.625rem;
  font-family: var(--font-mono); font-size: 0.75rem; color: var(--color-steel);
  letter-spacing: 0.03em;
}

/* ---- Top strip ---- */
.dpapp-topbar {
  flex-shrink: 0;
  padding: 14px 16px 10px;
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 0.5rem;
  border-bottom: 1px solid var(--color-steel-light);
}
.dpapp-topbar-title {
  font-family: var(--font-mono);
  font-size: 11px; letter-spacing: 0.06em; color: var(--color-accent);
  white-space: nowrap; overflow: hidden; text-overflow: ellipsis;
}
.dpapp-topbar-basis {
  font-family: var(--font-mono); font-size: 10px; color: var(--color-steel);
  flex-shrink: 0;
}

/* ---- Content ---- */
.dpapp-content {
  flex: 1;
  overflow: auto;
  padding: 14px 16px 24px;
  scrollbar-width: none;
}
.dpapp-content::-webkit-scrollbar { display: none; }

.dpapp-section-label {
  display: flex; align-items: baseline; gap: 0.5rem;
  margin-bottom: 0.75rem;
}
.dpapp-section-label + .dpapp-section-label { margin-top: 1.5rem; }
.dpapp-section-label span:first-child {
  font-family: var(--font-mono); font-size: 0.6875rem; color: var(--color-steel);
  letter-spacing: 0.05em;
}
.dpapp-section-label .rule { flex: 1; height: 1px; background: var(--color-paper-dim); }

.dpapp-field { margin-bottom: 1.25rem; }
.dpapp-field-label {
  display: block; font-size: 0.8125rem; font-weight: 600; margin-bottom: 0.375rem;
}
.dpapp-field-note { font-size: 0.75rem; color: var(--color-steel); margin-top: 0.375rem; }

.dpapp-select {
  width: 100%; min-height: 44px;
  border: 1px solid var(--color-steel);
  background: var(--color-white);
  font-family: var(--font-mono); font-size: 0.875rem; color: var(--color-charcoal);
  padding: 0 0.625rem;
}

.dpapp-segment { display: flex; border: 1px solid var(--color-graphite); }
.dpapp-segment-btn {
  flex: 1; min-height: 40px; border: 0; cursor: pointer;
  font-family: var(--font-mono); font-size: 0.75rem;
  background: var(--color-white); color: var(--color-graphite);
}
.dpapp-segment-btn + .dpapp-segment-btn { border-left: 1px solid var(--color-graphite); }
.dpapp-segment-btn.is-active { background: var(--color-accent); color: var(--color-white); font-weight: 500; }
.dpapp-segment-btn:not(.is-active):hover { background: var(--color-accent-wash); color: var(--color-accent-strong); }

.dpapp-pair-toggle { display: flex; border: 1px solid var(--color-graphite); margin-bottom: 1rem; }
.dpapp-pair-btn {
  flex: 1; min-height: 44px; border: 0; cursor: pointer;
  font-family: var(--font-mono); font-size: 0.6875rem; letter-spacing: 0.01em;
  background: var(--color-white); color: var(--color-graphite);
}
.dpapp-pair-btn + .dpapp-pair-btn { border-left: 1px solid var(--color-graphite); }
.dpapp-pair-btn.is-active { background: var(--color-accent); color: var(--color-white); font-weight: 500; }
.dpapp-pair-btn:not(.is-active):hover { background: var(--color-accent-wash); color: var(--color-accent-strong); }

.dpapp-input-row { display: flex; flex-wrap: wrap; gap: 0.625rem; margin-bottom: 1rem; }
.dpapp-input-col { flex: 1 1 160px; min-width: 0; margin: 0; }

.dpapp-input-group {
  display: flex; align-items: stretch;
  border: 1px solid var(--color-graphite); background: var(--color-white);
}
.dpapp-input-group.is-accent {
  border-color: var(--color-accent);
  box-shadow: inset 0 2px 0 var(--color-accent);
}
.dpapp-stepper-btn {
  width: 44px; flex-shrink: 0; border: 0; cursor: pointer;
  background: var(--color-paper); color: var(--color-graphite);
  font-size: 1.125rem; font-weight: 600;
}
.dpapp-input-group:not(.is-accent) .dpapp-stepper-btn:first-child { border-right: 1px solid var(--color-steel-light); }
.dpapp-input-group:not(.is-accent) .dpapp-stepper-btn:last-child { border-left: 1px solid var(--color-steel-light); }
.dpapp-input-group.is-accent .dpapp-stepper-btn { background: var(--color-accent-wash); color: var(--color-accent-strong); }
.dpapp-input-group.is-accent .dpapp-stepper-btn:first-child { border-right: 1px solid var(--color-steel-light); }
.dpapp-input-group.is-accent .dpapp-stepper-btn:last-child { border-left: 1px solid var(--color-steel-light); }
.dpapp-stepper-btn:hover { background: var(--color-accent-wash); color: var(--color-accent-strong); }
.dpapp-num-input {
  flex: 1; min-width: 0; width: 100%; text-align: center;
  border: 0; background: transparent;
  font-family: var(--font-mono); font-size: 17px; font-weight: 600; color: var(--color-charcoal);
  padding: 0.625rem 0;
}
.dpapp-num-input:focus-visible { outline: none; }
.dpapp-input-unit-note {
  text-align: center; font-family: var(--font-mono); font-size: 0.6875rem;
  color: var(--color-steel); margin-top: 0.25rem;
}
.dpapp-input-unit-note.is-accent { color: var(--color-accent); }

.dpapp-site-toggle {
  width: 100%; min-height: 44px; display: flex; align-items: center; gap: 0.5rem;
  background: none; border: 0; padding: 0.5rem 0; cursor: pointer; text-align: left;
  color: var(--color-charcoal);
}
.dpapp-site-toggle .tag { font-family: var(--font-mono); font-size: 0.6875rem; color: var(--color-steel); }
.dpapp-site-toggle .title { font-size: 0.875rem; font-weight: 600; }
.dpapp-site-toggle .summary { font-family: var(--font-mono); font-size: 0.6875rem; color: var(--color-accent); white-space: nowrap; margin-left: auto; }
.dpapp-site-toggle .chevron { font-family: var(--font-mono); font-size: 0.75rem; color: var(--color-steel); width: 0.75rem; text-align: center; }
.dpapp-site-wrap { border-top: 1px solid var(--color-steel-light); margin-bottom: 1rem; }
.dpapp-site-panel { padding-bottom: 0.875rem; }

.dpapp-or-divider { display: flex; align-items: center; gap: 0.625rem; padding-block: 0.375rem; }
.dpapp-or-divider .rule { flex: 1; height: 1px; background: var(--color-paper-dim); }
.dpapp-or-divider span:not(.rule) { font-family: var(--font-mono); font-size: 0.6875rem; color: var(--color-steel); }

.dpapp-error {
  border: 1px solid var(--color-error); border-left-width: 3px; background: var(--color-error-wash);
  padding: 0.75rem 0.875rem; margin-bottom: 1rem;
}
.dpapp-error strong {
  display: block; font-family: var(--font-mono); font-size: 0.625rem; letter-spacing: 0.06em;
  color: var(--color-error); margin-bottom: 0.1875rem;
}
.dpapp-error span { font-size: 0.875rem; color: #7E2C2C; }

.dpapp-submit-btn {
  width: 100%; min-height: 48px; display: flex; align-items: center; justify-content: center; gap: 0.5rem;
  background: var(--color-accent); color: var(--color-white); border: 1px solid var(--color-accent);
  font-family: var(--font-sans); font-size: 0.9375rem; font-weight: 600; cursor: pointer;
}
.dpapp-submit-btn:hover { background: var(--color-accent-strong); border-color: var(--color-accent-strong); }

.dpapp-danger-btn {
  width: 100%; min-height: 44px; display: flex; align-items: center; justify-content: center;
  border: 1px solid var(--color-error); background: var(--color-white); color: var(--color-error);
  font-family: var(--font-sans); font-size: 0.875rem; font-weight: 600; cursor: pointer;
  margin-bottom: 0.75rem;
}
.dpapp-danger-btn:hover { background: var(--color-error-wash); }

.dpapp-range { width: 100%; accent-color: var(--color-accent); height: 32px; }

.dpapp-choice-card {
  padding: 0.625rem 0.75rem; border: 1px solid var(--color-steel-light); cursor: pointer; background: var(--color-white);
}
.dpapp-choice-card.is-active { border-color: var(--color-accent); background: var(--color-accent-wash); }
.dpapp-choice-card:hover { border-color: var(--color-accent); }
.dpapp-choice-dot {
  width: 9px; height: 9px; border-radius: 50%; flex-shrink: 0;
  border: 1.5px solid var(--color-accent); background: transparent;
}
.dpapp-choice-dot.is-active { background: var(--color-accent); }

.dpapp-about-box {
  border: 1px solid var(--color-steel-light); padding: 0.875rem;
  font-family: var(--font-mono); font-size: 0.75rem; color: var(--color-graphite);
  display: flex; flex-direction: column; gap: 0.375rem;
}
.dpapp-about-box .row { display: flex; justify-content: space-between; }
.dpapp-about-box .row span:first-child { color: var(--color-steel); }

.dpapp-empty {
  border: 1px dashed var(--color-steel-light); padding: 1.75rem 1rem; text-align: center;
  font-size: 0.8125rem; color: var(--color-steel);
}

.dpapp-entries { display: flex; flex-direction: column; gap: 0.75rem; }
.dpapp-entry {
  position: relative; border: 1px solid var(--color-graphite); background: var(--color-white);
  box-shadow: 0 1px 2px rgba(27, 31, 35, 0.06);
}
.dpapp-entry.is-expanded { box-shadow: 0 1px 2px rgba(27, 31, 35, 0.06), 0 4px 14px rgba(27, 31, 35, 0.08); }
.dpapp-entry-accent { position: absolute; top: 0; left: 0; bottom: 0; width: 3px; background: transparent; }
.dpapp-entry-accent.is-pinned { background: var(--color-accent); }
.dpapp-entry-header {
  display: flex; align-items: center; gap: 0.5rem; padding: 0.625rem 0.75rem; cursor: pointer;
}
.dpapp-entry.is-expanded .dpapp-entry-header { border-bottom: 1px solid var(--color-paper-dim); }
.dpapp-entry-icon-btn {
  flex-shrink: 0; width: 32px; height: 32px; display: flex; align-items: center; justify-content: center;
  border: 0; background: none; color: var(--color-steel); cursor: pointer;
}
.dpapp-entry-icon-btn:hover { color: var(--color-accent-strong); }
.dpapp-entry-icon-btn.is-pinned { color: var(--color-accent); }
.dpapp-entry-icon-btn.is-remove:hover { color: var(--color-error); }

.dpapp-hero-row { display: flex; gap: 1px; background: var(--color-graphite); margin-bottom: 0.625rem; }
.dpapp-hero-card { flex: 1 1 0; min-width: 0; background: var(--color-accent-wash); padding: 0.625rem 0.5rem; }
.dpapp-hero-label { display: flex; align-items: center; gap: 0.25rem; margin-bottom: 0.3125rem; }
.dpapp-hero-label svg { width: 12px; height: 12px; color: var(--color-accent); flex-shrink: 0; }
.dpapp-hero-label span { font-family: var(--font-mono); font-size: 0.5625rem; letter-spacing: 0.04em; color: var(--color-accent); white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.dpapp-hero-value { font-family: var(--font-mono); font-weight: 600; font-size: 1rem; line-height: 1.1; color: var(--color-accent-strong); white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.dpapp-hero-value .unit { font-size: 0.5625rem; font-weight: 500; margin-left: 0.125rem; }

.dpapp-site-badge {
  display: inline-flex; align-items: center; gap: 0.1875rem; flex-shrink: 0;
  font-family: var(--font-mono); font-size: 0.625rem; color: var(--color-accent);
  border: 1px solid var(--color-steel-light); background: var(--color-paper); padding: 0.0625rem 0.3125rem;
}
.dpapp-site-badge svg { width: 9px; height: 9px; }

.dpapp-tabs { display: flex; border: 1px solid var(--color-graphite); margin-bottom: 0.75rem; }
.dpapp-tab-btn {
  flex: 1; min-height: 36px; border: 0; cursor: pointer;
  font-family: var(--font-sans); font-size: 0.75rem; font-weight: 600;
  background: var(--color-white); color: var(--color-graphite);
}
.dpapp-tab-btn + .dpapp-tab-btn { border-left: 1px solid var(--color-graphite); }
.dpapp-tab-btn.is-active { background: var(--color-accent); color: var(--color-white); }

.dpapp-table { border: 1px solid var(--color-steel-light); }
.dpapp-table-row {
  display: flex; flex-wrap: wrap; align-items: baseline; gap: 0.25rem 0.5rem;
  padding: 0.5625rem 0.625rem; border-bottom: 1px solid var(--color-paper-dim);
}
.dpapp-table-row:last-child { border-bottom: 0; }
.dpapp-table-label { display: flex; flex-wrap: wrap; align-items: baseline; gap: 0.3125rem; flex: 1 1 6rem; min-width: 0; }
.dpapp-table-label span:first-child { font-size: 0.8125rem; color: var(--color-charcoal); }
.dpapp-tag { font-family: var(--font-mono); font-size: 0.5625rem; letter-spacing: 0.05em; padding: 0.0625rem 0.3125rem; }
.dpapp-tag.is-given { background: var(--color-accent); color: var(--color-white); }
.dpapp-tag.is-calc { border: 1px solid var(--color-steel-light); color: var(--color-steel); }
.dpapp-table-value { flex: 0 1 auto; margin-left: auto; text-align: right; font-family: var(--font-mono); font-variant-numeric: tabular-nums; line-height: 1.2; }
.dpapp-table-value .num { font-size: 0.9375rem; font-weight: 500; color: var(--color-charcoal); }
.dpapp-table-value .unit { font-size: 0.6875rem; color: var(--color-graphite); margin-left: 0.25rem; }
.dpapp-table-value .sub { display: block; font-size: 0.5938rem; color: var(--color-steel); }

.dpapp-chart-box { border: 1px solid var(--color-steel-light); background: var(--color-white); padding: 0.625rem 0.5rem 0.375rem; }
.dpapp-chart-toolbar { display: flex; align-items: center; justify-content: flex-end; gap: 0.375rem; margin-bottom: 0.375rem; }
.dpapp-chart-toolbar .spacer { margin-right: auto; font-family: var(--font-mono); font-size: 0.625rem; color: var(--color-steel); }
.dpapp-zoom-btn {
  border: 1px solid var(--color-steel-light); background: var(--color-white); color: var(--color-graphite);
  font-size: 1rem; line-height: 1; cursor: pointer; width: 28px; height: 28px;
}
.dpapp-zoom-btn.is-reset { width: auto; min-height: 28px; padding: 0 0.5rem; font-family: var(--font-mono); font-size: 0.625rem; }
.dpapp-zoom-btn:hover { border-color: var(--color-accent); color: var(--color-accent-strong); }
.dpapp-chart-axis-labels { display: flex; justify-content: space-between; padding: 0.375rem 0 0; font-family: var(--font-mono); font-size: 0.5625rem; color: var(--color-steel); }

.dpapp-copy-btn {
  width: 100%; min-height: 40px; display: flex; align-items: center; justify-content: center; gap: 0.375rem;
  margin-top: 0.625rem; border: 1px solid var(--color-steel-light); background: var(--color-white); color: var(--color-graphite);
  font-family: var(--font-mono); font-size: 0.75rem; letter-spacing: 0.02em; cursor: pointer;
}
.dpapp-copy-btn.is-copied { border-color: var(--color-accent); background: var(--color-accent-wash); color: var(--color-accent-strong); }

/* ---- Bottom sheet ---- */
.dpapp-sheet-overlay { position: absolute; inset: 0; z-index: 40; pointer-events: none; }
.dpapp-sheet-overlay.is-open { pointer-events: auto; }
.dpapp-sheet-backdrop {
  position: absolute; inset: 0; background: rgba(27, 31, 35, 0);
  transition: background-color 0.28s ease;
}
.dpapp-sheet-overlay.is-open .dpapp-sheet-backdrop { background: rgba(27, 31, 35, 0.4); }
.dpapp-sheet {
  position: absolute; left: 0; right: 0; bottom: 0; max-height: 85%;
  display: flex; flex-direction: column;
  background: var(--color-white); border-top: 1px solid var(--color-graphite);
  box-shadow: 0 -8px 24px rgba(0, 0, 0, 0.18);
  transform: translateY(100%);
  transition: transform 0.3s cubic-bezier(0.32, 0.72, 0, 1);
}
.dpapp-sheet-overlay.is-open .dpapp-sheet { transform: translateY(0); }
.dpapp-sheet-handle { flex-shrink: 0; display: flex; justify-content: center; padding: 0.5rem 0 0.375rem; cursor: pointer; }
.dpapp-sheet-handle span { width: 36px; height: 4px; border-radius: 2px; background: var(--color-steel-light); }
.dpapp-sheet-header {
  flex-shrink: 0; display: flex; align-items: center; justify-content: space-between; gap: 0.5rem;
  padding: 0 1rem 0.625rem; border-bottom: 1px solid var(--color-paper-dim);
}
.dpapp-sheet-header .title { font-family: var(--font-mono); font-size: 0.75rem; color: var(--color-graphite); white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.dpapp-sheet-copy {
  flex-shrink: 0; min-height: 36px; display: flex; align-items: center; gap: 0.3125rem; padding: 0.375rem 0.625rem;
  border: 1px solid var(--color-steel-light); background: var(--color-white); color: var(--color-graphite);
  font-family: var(--font-mono); font-size: 0.6875rem; cursor: pointer;
}
.dpapp-sheet-copy.is-copied { border-color: var(--color-accent); background: var(--color-accent-wash); color: var(--color-accent-strong); }
.dpapp-sheet-body { flex: 1; overflow: auto; padding: 0.875rem 1rem 1.25rem; scrollbar-width: none; }
.dpapp-sheet-body::-webkit-scrollbar { display: none; }
.dpapp-sheet-save {
  width: 100%; min-height: 48px; display: flex; align-items: center; justify-content: center; gap: 0.5rem;
  margin-top: 0.875rem; background: var(--color-accent); color: var(--color-white); border: 1px solid var(--color-accent);
  font-family: var(--font-sans); font-size: 0.9375rem; font-weight: 600; cursor: pointer;
}
.dpapp-sheet-save:hover { background: var(--color-accent-strong); border-color: var(--color-accent-strong); }
.dpapp-sheet-discard {
  width: 100%; min-height: 40px; display: flex; align-items: center; justify-content: center; margin-top: 0.5rem;
  background: none; color: var(--color-steel); border: 0; font-size: 0.8125rem; cursor: pointer;
}
.dpapp-sheet-discard:hover { color: var(--color-charcoal); }

/* ---- Tab bar ---- */
.dpapp-tabbar {
  flex-shrink: 0; position: relative; z-index: 5; display: flex;
  background: rgba(247, 248, 248, 0.95); backdrop-filter: blur(10px);
  border-top: 1px solid var(--color-steel-light);
  padding: 6px 6px;
}
.dpapp-tabbar-btn {
  flex: 1; display: flex; flex-direction: column; align-items: center; gap: 0.1875rem;
  padding: 0.375rem 0; min-height: 44px; justify-content: center;
  background: none; border: 0; cursor: pointer; color: var(--color-steel);
}
.dpapp-tabbar-btn.is-active { color: var(--color-accent); }
.dpapp-tabbar-btn svg { width: 22px; height: 22px; }
.dpapp-tabbar-btn span { font-size: 0.625rem; font-weight: 500; letter-spacing: 0.01em; }

@media (max-width: 480px) {
  .dpapp-wrap { padding: 0; background: var(--color-paper); }
  .dpapp-shell { max-width: none; height: 100vh; min-height: 100vh; border: 0; border-radius: 0; box-shadow: none; }
}

/* ---- Desktop: reclaim width with a rail nav + side drawer instead of the
   bottom tab bar / bottom sheet a narrow screen needs. Same DOM and classes
   as mobile/tablet -- only the arrangement changes. ---- */
@media (min-width: 900px) {
  .dpapp-shell {
    max-width: 900px;
    height: min(680px, 82vh);
    display: grid;
    grid-template-columns: 92px 1fr;
    grid-template-rows: auto 1fr;
    grid-template-areas: "rail topbar" "rail content";
  }
  .dpapp-topbar { grid-area: topbar; }
  .dpapp-content { grid-area: content; padding-left: 24px; padding-right: 24px; }
  .dpapp-content > * { max-width: 640px; }

  .dpapp-tabbar {
    grid-area: rail;
    flex-direction: column;
    justify-content: flex-start;
    gap: 4px;
    padding: 20px 8px;
    border-top: 0;
    border-right: 1px solid var(--color-steel-light);
  }
  .dpapp-tabbar-btn { flex: 0 0 auto; width: 100%; }

  /* Result sheet becomes a right-hand drawer instead of a bottom sheet. */
  .dpapp-sheet {
    left: auto; right: 0; top: 0; bottom: 0;
    width: 400px; max-height: none;
    border-top: 0; border-left: 1px solid var(--color-graphite);
    box-shadow: -8px 0 24px rgba(0, 0, 0, 0.18);
    transform: translateX(100%);
    transition: transform 0.3s cubic-bezier(0.32, 0.72, 0, 1);
  }
  .dpapp-sheet-overlay.is-open .dpapp-sheet { transform: translateX(0); }
  .dpapp-sheet-handle { display: none; }
}