:root {
  color-scheme: dark;
  --rail-width: 248px;
  --mobile-nav-height: 74px;
  --content-max: 1320px;
  --radius-sm: 12px;
  --radius-md: 18px;
  --radius-lg: 28px;
  --radius-pill: 999px;
  --font: Inter, ui-sans-serif, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  --success: #48bf83;
  --warning: #dda94b;
  --danger: #dc6570;
}

html[data-mode="dark"], body[data-mode="dark"] {
  color-scheme: dark;
  --canvas: #0b0d10;
  --canvas-raised: #101319;
  --surface-1: #171b21;
  --surface-2: #1e232b;
  --surface-3: #282e38;
  --input: #101319;
  --text: #f4f1e9;
  --text-secondary: #b7b4ad;
  --text-muted: #7f8183;
  --border: #313740;
  --border-strong: #474f5b;
  --accent: #d4aa50;
  --accent-bright: #f1d381;
  --accent-contrast: #1d1607;
  --accent-soft: rgba(212, 170, 80, 0.14);
  --accent-medium: rgba(212, 170, 80, 0.28);
  --scrim: rgba(2, 3, 5, 0.78);
  --shadow: 0 24px 70px rgba(0, 0, 0, 0.34);
  --hero-art: rgba(212, 170, 80, 0.18);
}

html[data-mode="light"], body[data-mode="light"] {
  color-scheme: light;
  --canvas: #f5f2eb;
  --canvas-raised: #ebe7de;
  --surface-1: #fffdf8;
  --surface-2: #f3efe7;
  --surface-3: #e9e3d8;
  --input: #fffdf8;
  --text: #212326;
  --text-secondary: #5f625f;
  --text-muted: #85847e;
  --border: #d8d2c7;
  --border-strong: #bdb4a4;
  --accent: #9d7222;
  --accent-bright: #b8872d;
  --accent-contrast: #fffaf0;
  --accent-soft: rgba(157, 114, 34, 0.10);
  --accent-medium: rgba(157, 114, 34, 0.20);
  --scrim: rgba(32, 29, 23, 0.45);
  --shadow: 0 22px 60px rgba(70, 60, 44, 0.16);
  --hero-art: rgba(157, 114, 34, 0.13);
}

* { box-sizing: border-box; }
html { min-height: 100%; background: var(--canvas); }
body {
  min-height: 100vh;
  min-height: 100svh;
  margin: 0;
  overflow-x: hidden;
  background:
    radial-gradient(circle at 88% 3%, var(--hero-art), transparent 26rem),
    var(--canvas);
  color: var(--text);
  font-family: var(--font);
  font-size: 16px;
  line-height: 1.5;
  transition: background-color 180ms ease, color 180ms ease;
}
body::before {
  content: "";
  position: fixed;
  inset: 0;
  z-index: -1;
  pointer-events: none;
  opacity: .28;
  background-image:
    linear-gradient(118deg, transparent 0 48%, var(--accent-soft) 48.2% 48.4%, transparent 48.6%),
    linear-gradient(72deg, transparent 0 74%, var(--accent-soft) 74.2% 74.35%, transparent 74.55%);
  background-size: 410px 410px, 620px 620px;
}
button, input, select, textarea { font: inherit; }
button, input, select, textarea, label { -webkit-tap-highlight-color: transparent; }
button { color: inherit; }
button:not(:disabled), label, select { cursor: pointer; }
svg {
  width: 1.2em;
  height: 1.2em;
  display: block;
  fill: none;
  stroke: currentColor;
  stroke-width: 1.8;
  stroke-linecap: round;
  stroke-linejoin: round;
}

.desktop-rail {
  position: fixed;
  inset: 0 auto 0 0;
  z-index: 20;
  width: var(--rail-width);
  display: flex;
  flex-direction: column;
  padding: max(1.2rem, env(safe-area-inset-top)) 1rem max(1rem, env(safe-area-inset-bottom));
  border-right: 1px solid var(--border);
  background: color-mix(in srgb, var(--canvas-raised) 94%, transparent);
  backdrop-filter: blur(20px);
}
.brand-button {
  display: flex;
  align-items: center;
  gap: .8rem;
  padding: .5rem;
  border: 0;
  background: transparent;
  text-align: left;
}
.brand-logo { width: 42px; height: 42px; border-radius: 12px; }
.brand-button span { display: flex; flex-direction: column; line-height: 1.1; }
.brand-button strong { font-size: 1rem; letter-spacing: .01em; }
.brand-button small { margin-top: .25rem; color: var(--text-muted); }
.desktop-nav { display: grid; gap: .35rem; margin-top: 1.6rem; }
.desktop-nav button {
  min-height: 3rem;
  display: flex;
  align-items: center;
  gap: .8rem;
  padding: .65rem .8rem;
  border: 1px solid transparent;
  border-radius: 14px;
  background: transparent;
  color: var(--text-secondary);
  text-align: left;
}
.desktop-nav button:hover { background: var(--surface-1); color: var(--text); }
.desktop-nav button.is-active { border-color: var(--accent-medium); background: var(--accent-soft); color: var(--accent-bright); }
.desktop-nav svg { width: 1.35rem; height: 1.35rem; }
.rail-footer { margin-top: auto; display: grid; gap: .55rem; padding: .75rem .55rem; color: var(--text-muted); font-size: .75rem; }
.version-pill { width: fit-content; padding: .22rem .55rem; border: 1px solid var(--border); border-radius: var(--radius-pill); background: var(--surface-1); }
#storage-status[data-status="saving"], #storage-status[data-status="loading"] { color: var(--warning); }
#storage-status[data-status="saved"] { color: var(--success); }

.app-main {
  width: calc(100% - var(--rail-width));
  min-height: 100vh;
  min-height: 100svh;
  margin-left: var(--rail-width);
  padding: max(2rem, env(safe-area-inset-top)) clamp(1.25rem, 4vw, 4rem) 4rem;
  outline: none;
}
.app-main > * { width: min(100%, var(--content-max)); margin-inline: auto; }
.mobile-nav { display: none; }

.hero {
  min-height: 22rem;
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(18rem, .7fr);
  align-items: center;
  gap: 2rem;
  padding: clamp(2rem, 6vw, 5rem);
  overflow: hidden;
  border: 1px solid var(--border);
  border-radius: 34px;
  background:
    radial-gradient(circle at 80% 20%, var(--accent-soft), transparent 22rem),
    linear-gradient(135deg, color-mix(in srgb, var(--surface-1) 96%, transparent), var(--surface-2));
  box-shadow: var(--shadow);
}
.hero-copy { position: relative; z-index: 2; }
.hero h1 { max-width: 12ch; margin: .55rem 0 1rem; font-size: clamp(2.8rem, 6vw, 5.8rem); line-height: .94; letter-spacing: -.065em; }
.hero p { max-width: 43rem; margin: 0; color: var(--text-secondary); font-size: clamp(1rem, 2vw, 1.18rem); }
.eyebrow { display: block; color: var(--accent-bright); font-size: .73rem; font-weight: 700; letter-spacing: .13em; text-transform: uppercase; }
.hero-camera {
  position: relative;
  aspect-ratio: 1;
  display: grid;
  place-items: center;
  color: var(--accent-bright);
}
.hero-camera::before, .hero-camera::after, .hero-camera i, .hero-camera b {
  content: "";
  position: absolute;
  border: 1px solid var(--accent-medium);
  border-radius: 50%;
}
.hero-camera::before { inset: 7%; }
.hero-camera::after { inset: 19%; }
.hero-camera i { inset: 31%; }
.hero-camera b { inset: 2%; border-style: dashed; opacity: .6; }
.hero-camera span {
  width: 34%;
  aspect-ratio: 1;
  display: grid;
  place-items: center;
  border-radius: 50%;
  background: var(--accent-soft);
  box-shadow: 0 0 0 1rem color-mix(in srgb, var(--accent-soft) 35%, transparent);
}
.hero-camera svg { width: 52%; height: 52%; }

.tool-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 1rem; margin-top: 1rem; }
.tool-card {
  min-height: 10rem;
  display: grid;
  grid-template-columns: auto minmax(0, 1fr) auto;
  align-items: start;
  gap: 1rem;
  padding: 1.25rem;
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  background: var(--surface-1);
  text-align: left;
  transition: transform 140ms ease, border-color 140ms ease, background 140ms ease;
}
.tool-card:hover { transform: translateY(-2px); border-color: var(--accent-medium); background: color-mix(in srgb, var(--surface-1) 84%, var(--accent-soft)); }
.tool-icon { width: 2.9rem; height: 2.9rem; display: grid; place-items: center; border-radius: 14px; background: var(--accent-soft); color: var(--accent-bright); }
.tool-icon svg { width: 1.45rem; height: 1.45rem; }
.tool-card strong { display: block; margin-bottom: .35rem; font-size: 1.05rem; }
.tool-card p { margin: 0; color: var(--text-secondary); font-size: .9rem; }
.card-arrow { color: var(--text-muted); font-size: 1.25rem; }
.dashboard-grid { display: grid; grid-template-columns: 1.25fr .75fr; gap: 1rem; margin-top: 1rem; }
.panel {
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  background: color-mix(in srgb, var(--surface-1) 96%, transparent);
}
.equipment-summary, .status-panel { padding: 1.25rem; }
.section-heading { display: flex; align-items: flex-start; justify-content: space-between; gap: 1rem; }
.section-heading h2 { margin: .3rem 0 0; font-size: 1.25rem; }
.text-button { padding: .45rem .65rem; border: 0; background: transparent; color: var(--accent-bright); }
.gear-chips { display: flex; flex-wrap: wrap; gap: .5rem; margin-top: 1.1rem; }
.gear-chips span { padding: .4rem .7rem; border: 1px solid var(--border); border-radius: var(--radius-pill); background: var(--surface-2); color: var(--text-secondary); font-size: .8rem; }
.status-panel { display: flex; align-items: center; gap: 1rem; }
.status-panel p { margin: .2rem 0; color: var(--text-secondary); }
.status-panel small { color: var(--text-muted); }
.status-icon { width: 3rem; height: 3rem; flex: 0 0 auto; display: grid; place-items: center; border-radius: 50%; background: color-mix(in srgb, var(--success) 14%, transparent); color: var(--success); }

.page-header { padding: .8rem 0 1.8rem; }
.page-header h1 { margin: .4rem 0 .35rem; font-size: clamp(2rem, 4vw, 3.5rem); letter-spacing: -.045em; line-height: 1; }
.page-header p { max-width: 48rem; margin: 0; color: var(--text-secondary); }
.calculator-layout { display: grid; grid-template-columns: minmax(0, 1.2fr) minmax(20rem, .8fr); gap: 1rem; align-items: start; }
.form-panel { padding: clamp(1rem, 3vw, 1.5rem); }
.result-panel {
  position: sticky;
  top: 1.5rem;
  min-height: 22rem;
  padding: clamp(1.25rem, 3vw, 1.7rem);
  border: 1px solid var(--accent-medium);
  border-radius: var(--radius-lg);
  background:
    radial-gradient(circle at 100% 0, var(--accent-soft), transparent 18rem),
    var(--surface-1);
  box-shadow: var(--shadow);
}
.result-kicker { color: var(--text-muted); font-size: .76rem; font-weight: 700; letter-spacing: .1em; text-transform: uppercase; }
.primary-result { margin: .45rem 0 1.25rem; color: var(--accent-bright); font-size: clamp(2rem, 5vw, 3.5rem); font-weight: 750; letter-spacing: -.05em; line-height: 1; overflow-wrap: anywhere; }
.result-metrics { display: grid; gap: .65rem; }
.result-metrics.two-col { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.result-metrics > div { min-width: 0; padding: .8rem; border: 1px solid var(--border); border-radius: 14px; background: var(--surface-2); }
.result-metrics span { display: block; margin-bottom: .15rem; color: var(--text-muted); font-size: .72rem; }
.result-metrics strong { display: block; font-size: .93rem; overflow-wrap: anywhere; }
.method-card { margin-top: .75rem; padding: 1rem; border-left: 3px solid var(--accent); border-radius: 0 14px 14px 0; background: var(--accent-soft); }
.method-card strong, .method-card span { display: block; }
.method-card span { margin-top: .25rem; color: var(--text-secondary); font-size: .86rem; }
.breakdown { margin-top: .75rem; border: 1px solid var(--border); border-radius: 14px; background: var(--surface-2); }
.breakdown summary { padding: .8rem .9rem; color: var(--text-secondary); font-size: .86rem; }
.breakdown > div { display: flex; justify-content: space-between; gap: 1rem; padding: .55rem .9rem; border-top: 1px solid var(--border); font-size: .82rem; }
.breakdown span { color: var(--text-muted); }
.warning-list { display: grid; gap: .45rem; margin-top: .75rem; }
.warning-list p { display: flex; align-items: flex-start; gap: .55rem; margin: 0; padding: .7rem .75rem; border: 1px solid color-mix(in srgb, var(--warning) 30%, var(--border)); border-radius: 13px; background: color-mix(in srgb, var(--warning) 8%, var(--surface-1)); color: var(--text-secondary); font-size: .8rem; }
.warning-list svg { flex: 0 0 auto; margin-top: .08rem; color: var(--warning); }
.success-callout, .danger-callout { display: flex; align-items: flex-start; gap: .7rem; margin-top: .75rem; padding: .85rem; border-radius: 14px; }
.success-callout { background: color-mix(in srgb, var(--success) 10%, var(--surface-2)); color: var(--success); }
.danger-callout { background: color-mix(in srgb, var(--danger) 10%, var(--surface-2)); color: var(--danger); }
.success-callout > svg, .danger-callout > svg { flex: 0 0 auto; margin-top: .1rem; }
.success-callout p, .danger-callout p { margin: .15rem 0 0; color: var(--text-secondary); font-size: .82rem; }

.field-group { min-width: 0; margin: 0 0 1.25rem; padding: 0; border: 0; }
.field-group legend { margin-bottom: .5rem; color: var(--text-secondary); font-size: .82rem; font-weight: 650; }
.segmented { display: grid; gap: .4rem; padding: .35rem; border: 1px solid var(--border); border-radius: 15px; background: var(--surface-2); }
.segmented.two { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.segmented label { min-width: 0; }
.segmented input { position: absolute; opacity: 0; pointer-events: none; }
.segmented span { min-height: 2.7rem; display: flex; align-items: center; justify-content: center; gap: .45rem; padding: .55rem .7rem; border-radius: 11px; color: var(--text-secondary); text-align: center; font-size: .86rem; }
.segmented input:checked + span { background: var(--accent); color: var(--accent-contrast); font-weight: 700; }
.locked-support { display: flex; align-items: center; gap: .8rem; margin-bottom: 1.25rem; padding: .9rem; border: 1px solid var(--accent-medium); border-radius: 15px; background: var(--accent-soft); }
.locked-support > span { width: 2.5rem; height: 2.5rem; flex: 0 0 auto; display: grid; place-items: center; border-radius: 12px; background: var(--surface-1); color: var(--accent-bright); }
.locked-support strong, .locked-support small { display: block; }
.locked-support small { color: var(--text-secondary); }
.form-grid { display: grid; gap: .85rem; }
.form-grid.two-up { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.form-grid.three-up { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.field { min-width: 0; }
.field > label, .field > .label { display: block; margin-bottom: .38rem; color: var(--text-secondary); font-size: .8rem; font-weight: 650; }
.field input, .field select, .static-control {
  width: 100%;
  min-width: 0;
  min-height: 3rem;
  padding: .68rem .78rem;
  border: 1px solid var(--border);
  border-radius: 13px;
  outline: none;
  background: var(--input);
  color: var(--text);
}
.field input:focus, .field select:focus { border-color: var(--accent); box-shadow: 0 0 0 3px var(--accent-soft); }
.static-control { display: flex; align-items: center; color: var(--text-muted); }
.joined-control { display: grid; grid-template-columns: minmax(0, .65fr) minmax(0, 1fr); }
.joined-control input { border-radius: 13px 0 0 13px; }
.joined-control select { border-left: 0; border-radius: 0 13px 13px 0; }
.unit-input { display: grid; grid-template-columns: minmax(0, 1fr) auto; align-items: stretch; }
.unit-input input { border-radius: 13px 0 0 13px; }
.unit-input span { display: flex; align-items: center; padding: 0 .75rem; border: 1px solid var(--border); border-left: 0; border-radius: 0 13px 13px 0; background: var(--surface-2); color: var(--text-muted); font-size: .78rem; white-space: nowrap; }
.range-pair { min-height: 3rem; display: grid; grid-template-columns: minmax(0, 1fr) auto; align-items: center; gap: .75rem; padding: .45rem .7rem; border: 1px solid var(--border); border-radius: 13px; background: var(--input); }
.range-pair input { min-height: auto; padding: 0; border: 0; box-shadow: none; accent-color: var(--accent); }
.range-pair output { min-width: 4.4rem; color: var(--accent-bright); font-size: .83rem; font-weight: 700; text-align: right; }
.subheading { margin: 1.35rem 0 .65rem; font-size: .92rem; }
.filter-grid { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: .55rem; }
.filter-option { min-width: 0; }
.filter-option input { position: absolute; opacity: 0; pointer-events: none; }
.filter-option span { min-height: 4.4rem; display: flex; flex-direction: column; justify-content: center; padding: .75rem; border: 1px solid var(--border); border-radius: 14px; background: var(--surface-2); }
.filter-option strong, .filter-option small { display: block; }
.filter-option small { margin-top: .15rem; color: var(--text-muted); font-size: .73rem; }
.filter-option input:checked + span { border-color: var(--accent); background: var(--accent-soft); color: var(--accent-bright); }
.compact-field { max-width: 13rem; margin-top: .7rem; }
.field-note { margin: .85rem 0 0; color: var(--text-muted); font-size: .78rem; }
.is-hidden { display: none !important; }

.primary-button, .secondary-button, .danger-button, .icon-button {
  min-height: 2.8rem;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: .5rem;
  padding: .65rem .9rem;
  border-radius: 13px;
}
.primary-button { border: 1px solid var(--accent); background: var(--accent); color: var(--accent-contrast); font-weight: 750; }
.secondary-button { border: 1px solid var(--border); background: var(--surface-2); color: var(--text); }
.danger-button { margin-top: .8rem; border: 1px solid color-mix(in srgb, var(--danger) 45%, var(--border)); background: color-mix(in srgb, var(--danger) 8%, var(--surface-2)); color: var(--danger); }
.icon-button { width: 2.8rem; padding: 0; border: 1px solid var(--border); background: var(--surface-2); }
.primary-button.full { width: 100%; margin-top: .85rem; }
.button-row { display: flex; flex-wrap: wrap; gap: .65rem; }
.button-row.centered { justify-content: center; }

.gear-layout { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 1rem; }
.gear-card { position: relative; min-height: 18rem; overflow: hidden; padding: 1.35rem; }
.gear-card::after { content: ""; position: absolute; width: 12rem; height: 12rem; right: -4rem; top: -4rem; border: 1px solid var(--accent-medium); border-radius: 50%; box-shadow: 0 0 0 2rem var(--accent-soft); pointer-events: none; }
.gear-card-icon { width: 3rem; height: 3rem; display: grid; place-items: center; margin-bottom: 1.2rem; border-radius: 14px; background: var(--accent-soft); color: var(--accent-bright); }
.gear-card h2 { max-width: 24rem; margin: .3rem 0 1.1rem; font-size: 1.4rem; }
.gear-card dl { display: grid; gap: .55rem; margin: 0; }
.gear-card dl div { display: flex; justify-content: space-between; gap: 1rem; padding-bottom: .5rem; border-bottom: 1px solid var(--border); }
.gear-card dt { color: var(--text-muted); font-size: .8rem; }
.gear-card dd { margin: 0; text-align: right; font-size: .85rem; font-weight: 650; }
.filter-spec-list { display: grid; gap: .55rem; }
.filter-spec-list div { display: flex; justify-content: space-between; gap: 1rem; padding: .7rem; border-radius: 12px; background: var(--surface-2); }
.filter-spec-list span { color: var(--text-muted); font-size: .8rem; }

.settings-layout { display: grid; gap: 1rem; }
.settings-card { padding: 1.25rem; }
.appearance-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: .7rem; margin-top: 1rem; }
.appearance-option input { position: absolute; opacity: 0; pointer-events: none; }
.appearance-option > span { display: grid; gap: .35rem; padding: .65rem; border: 1px solid var(--border); border-radius: 16px; background: var(--surface-2); }
.appearance-option input:checked + span { border-color: var(--accent); box-shadow: 0 0 0 3px var(--accent-soft); }
.appearance-option i { height: 5rem; display: block; border: 1px solid var(--border); border-radius: 11px; }
.dark-preview { background: radial-gradient(circle at 80% 10%, rgba(212,170,80,.25), transparent 45%), #101319; }
.light-preview { background: radial-gradient(circle at 80% 10%, rgba(157,114,34,.18), transparent 45%), #f5f2eb; }
.split-preview { background: linear-gradient(90deg, #101319 0 50%, #f5f2eb 50%); }
.appearance-option strong, .appearance-option small { display: block; }
.appearance-option small { color: var(--text-muted); }
.settings-copy { max-width: 50rem; color: var(--text-secondary); }
.about-card p { margin-bottom: 0; color: var(--text-secondary); }

.modal-backdrop {
  position: fixed;
  inset: 0;
  z-index: 100;
  display: grid;
  place-items: center;
  padding: 1rem;
  background: var(--scrim);
  backdrop-filter: blur(10px);
}
.timer-modal { position: relative; width: min(100%, 30rem); padding: 1.5rem; border: 1px solid var(--border-strong); border-radius: 26px; background: var(--surface-1); box-shadow: var(--shadow); text-align: center; }
.close-button { position: absolute; top: .8rem; right: .8rem; }
.timer-modal h2 { margin: .4rem 0 1.2rem; font-size: 1rem; color: var(--text-secondary); }
.timer-display { font-size: clamp(2.4rem, 10vw, 5rem); font-weight: 760; letter-spacing: -.055em; }
.timer-progress { height: .65rem; margin: 1rem 0 1.3rem; overflow: hidden; border-radius: var(--radius-pill); background: var(--surface-3); }
.timer-progress i { width: 0; height: 100%; display: block; border-radius: inherit; background: var(--accent); transition: width 90ms linear; }
.toast-region { position: fixed; z-index: 140; right: max(1rem, env(safe-area-inset-right)); bottom: max(1rem, env(safe-area-inset-bottom)); display: grid; gap: .5rem; pointer-events: none; }
.toast { max-width: 22rem; padding: .75rem .9rem; border: 1px solid var(--border-strong); border-radius: 13px; background: var(--surface-1); box-shadow: var(--shadow); }

@media (max-width: 1080px) {
  .calculator-layout { grid-template-columns: 1fr; }
  .result-panel { position: static; }
  .tool-grid { grid-template-columns: 1fr; }
  .tool-card { min-height: 7rem; }
  .dashboard-grid { grid-template-columns: 1fr; }
}

@media (max-width: 820px) {
  .desktop-rail { display: none; }
  .app-main {
    width: 100%;
    margin: 0;
    padding: calc(max(1rem, env(safe-area-inset-top)) + .35rem) 1rem calc(var(--mobile-nav-height) + max(1.25rem, env(safe-area-inset-bottom)));
  }
  .mobile-nav {
    position: fixed;
    inset: auto 0 0;
    z-index: 40;
    min-height: calc(var(--mobile-nav-height) + env(safe-area-inset-bottom));
    display: grid;
    grid-template-columns: repeat(5, minmax(0, 1fr));
    padding: .45rem .35rem max(.45rem, env(safe-area-inset-bottom));
    border-top: 1px solid var(--border);
    background: color-mix(in srgb, var(--canvas-raised) 94%, transparent);
    backdrop-filter: blur(20px);
  }
  .mobile-nav button {
    min-width: 0;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: .22rem;
    padding: .35rem .15rem;
    border: 0;
    border-radius: 12px;
    background: transparent;
    color: var(--text-muted);
    font-size: .64rem;
  }
  .mobile-nav button.is-active { background: var(--accent-soft); color: var(--accent-bright); }
  .mobile-nav svg { width: 1.3rem; height: 1.3rem; }
  body.keyboard-open .mobile-nav { display: none; }
  body.keyboard-open .app-main { padding-bottom: max(1rem, env(safe-area-inset-bottom)); }
  .toast-region { bottom: calc(var(--mobile-nav-height) + max(1rem, env(safe-area-inset-bottom))); }
  .hero { min-height: 0; grid-template-columns: 1fr; padding: 1.5rem; border-radius: 26px; }
  .hero h1 { font-size: clamp(2.6rem, 14vw, 4.6rem); }
  .hero-camera { display: none; }
  .page-header { padding-top: .35rem; }
  .gear-layout { grid-template-columns: 1fr; }
}

@media (max-width: 620px) {
  .form-grid.two-up, .form-grid.three-up, .appearance-grid { grid-template-columns: 1fr; }
  .filter-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .result-metrics.two-col { grid-template-columns: 1fr 1fr; }
  .tool-card { grid-template-columns: auto minmax(0, 1fr); }
  .card-arrow { display: none; }
  .appearance-option i { height: 3.6rem; }
}

@media (max-width: 390px) {
  .app-main { padding-inline: .75rem; }
  .hero { padding: 1.15rem; }
  .result-metrics.two-col { grid-template-columns: 1fr; }
  .segmented span { padding-inline: .4rem; font-size: .78rem; }
  .mobile-nav button { font-size: .59rem; }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { scroll-behavior: auto !important; transition: none !important; animation: none !important; }
}


/* v0.1.1 theme system and simplified calculators */
html[data-theme="graphite-gold"], body[data-theme="graphite-gold"] {
  --canvas:#090b0e; --canvas-raised:#0e1116; --surface-1:#171a20; --surface-2:#20242c; --surface-3:#2a303a; --input:#0d1015;
  --text:#f4f0e7; --text-secondary:#bbb6ac; --text-muted:#85827d; --border:#343943; --border-strong:#515866;
  --accent:#d4ad4f; --accent-bright:#f3d77b; --accent-contrast:#1e1708; --accent-soft:rgba(212,173,79,.14); --accent-medium:rgba(212,173,79,.30);
  --hero-art:rgba(212,173,79,.18); --theme-motif:linear-gradient(128deg,transparent 0 43%,rgba(232,203,112,.22) 43.2% 43.5%,transparent 43.8%),linear-gradient(52deg,transparent 0 70%,rgba(181,142,49,.18) 70.2% 70.5%,transparent 70.8%);
}
html[data-theme="midnight-violet"], body[data-theme="midnight-violet"] {
  --canvas:#0e0b13; --canvas-raised:#14101b; --surface-1:#1b1624; --surface-2:#251e31; --surface-3:#312740; --input:#100d16;
  --text:#f4eff8; --text-secondary:#c1b5c9; --text-muted:#8b8093; --border:#3a3046; --border-strong:#584667;
  --accent:#a96ee8; --accent-bright:#cf9cff; --accent-contrast:#1b0f27; --accent-soft:rgba(169,110,232,.15); --accent-medium:rgba(169,110,232,.31);
  --hero-art:rgba(169,110,232,.20); --theme-motif:radial-gradient(circle at 78% 18%,rgba(194,139,255,.24),transparent 21rem),radial-gradient(circle at 17% 76%,rgba(102,72,166,.18),transparent 18rem);
}
html[data-theme="deep-ocean"], body[data-theme="deep-ocean"] {
  --canvas:#071019; --canvas-raised:#0b1620; --surface-1:#101e29; --surface-2:#172a38; --surface-3:#203847; --input:#09141d;
  --text:#edf5f7; --text-secondary:#b2c4c9; --text-muted:#748b93; --border:#29404c; --border-strong:#3c5b68;
  --accent:#43a9c1; --accent-bright:#78d4e7; --accent-contrast:#06181d; --accent-soft:rgba(67,169,193,.15); --accent-medium:rgba(67,169,193,.30);
  --hero-art:rgba(67,169,193,.18); --theme-motif:repeating-radial-gradient(ellipse at 110% 10%,transparent 0 42px,rgba(89,181,205,.11) 43px 45px,transparent 46px 78px);
}
html[data-theme="warm-stone"], body[data-theme="warm-stone"] {
  --canvas:#d8d0c1; --canvas-raised:#cec4b3; --surface-1:#e8e1d6; --surface-2:#ddd4c6; --surface-3:#d0c4b3; --input:#eee8de;
  --text:#302b25; --text-secondary:#625a50; --text-muted:#81786d; --border:#b7aa98; --border-strong:#958571;
  --accent:#8a6230; --accent-bright:#6e491d; --accent-contrast:#fff8ec; --accent-soft:rgba(138,98,48,.13); --accent-medium:rgba(138,98,48,.25);
  --hero-art:rgba(138,98,48,.13); --theme-motif:linear-gradient(135deg,rgba(255,255,255,.16),transparent 44%),linear-gradient(38deg,transparent 0 74%,rgba(104,73,35,.10) 74.3% 74.7%,transparent 75%);
}
html[data-theme="sage-paper"], body[data-theme="sage-paper"] {
  --canvas:#cbd0c2; --canvas-raised:#c1c7b8; --surface-1:#dde1d6; --surface-2:#d1d7ca; --surface-3:#c3cbbb; --input:#e6e9e0;
  --text:#293029; --text-secondary:#576057; --text-muted:#747d73; --border:#a8b0a2; --border-strong:#838f82;
  --accent:#52725b; --accent-bright:#355b43; --accent-contrast:#f4fbf3; --accent-soft:rgba(82,114,91,.13); --accent-medium:rgba(82,114,91,.25);
  --hero-art:rgba(82,114,91,.14); --theme-motif:radial-gradient(ellipse at 92% 10%,rgba(77,117,84,.15),transparent 22rem),linear-gradient(115deg,transparent 0 62%,rgba(61,92,67,.08) 62.3% 63%,transparent 63.3%);
}
html[data-theme="mist-blue"], body[data-theme="mist-blue"] {
  --canvas:#c9d1d7; --canvas-raised:#bec8cf; --surface-1:#dde4e8; --surface-2:#d0dade; --surface-3:#c0ccd2; --input:#e7ecef;
  --text:#263039; --text-secondary:#56636b; --text-muted:#74818a; --border:#a4b2bb; --border-strong:#7f919c;
  --accent:#4d7085; --accent-bright:#315e77; --accent-contrast:#f4fbff; --accent-soft:rgba(77,112,133,.13); --accent-medium:rgba(77,112,133,.25);
  --hero-art:rgba(77,112,133,.15); --theme-motif:repeating-linear-gradient(165deg,transparent 0 58px,rgba(79,111,130,.08) 59px 61px,transparent 62px 112px);
}
body { background-image:var(--theme-motif); background-color:var(--canvas); background-blend-mode:normal; }
body::before { opacity:.12; }

.home-kit { margin-top:1rem; }
.tool-grid { grid-template-columns:repeat(2,minmax(0,1fr)); }
.offline-strip { width:fit-content; display:flex; align-items:center; gap:.55rem; margin:1rem 0 0 auto; padding:.65rem .85rem; border:1px solid var(--border); border-radius:999px; background:var(--surface-1); color:var(--text-secondary); font-size:.85rem; }
.offline-strip svg { color:var(--success); }
.subheading.first { margin-top:0; }
.corrected-settings-grid { display:grid; grid-template-columns:repeat(2,minmax(0,1fr)); gap:.7rem; margin:1rem 0; }
.corrected-settings-grid > div { padding:1rem; border:1px solid var(--border); border-radius:16px; background:var(--surface-2); }
.corrected-settings-grid span { display:block; margin-bottom:.18rem; color:var(--text-muted); font-size:.75rem; }
.corrected-settings-grid strong { display:block; font-size:1.25rem; overflow-wrap:anywhere; }
.corrected-settings-grid .shutter-setting { grid-column:1/-1; border-color:var(--accent-medium); background:var(--accent-soft); }
.corrected-settings-grid .shutter-setting strong { color:var(--accent-bright); font-size:clamp(1.55rem,4vw,2.35rem); }
.empty-result { margin-top:1rem; padding:1.1rem; border:1px dashed var(--border-strong); border-radius:16px; color:var(--text-secondary); }

.theme-group-label { margin:1.25rem 0 .55rem; color:var(--text-secondary); font-size:.85rem; font-weight:600; }
.theme-grid { display:grid; grid-template-columns:repeat(3,minmax(0,1fr)); gap:.75rem; }
.theme-card { position:relative; min-height:8.5rem; overflow:hidden; display:flex; flex-direction:column; justify-content:flex-end; align-items:flex-start; padding:1rem; border:1px solid var(--border); border-radius:19px; text-align:left; color:var(--preview-text,#f4f1e9); background:var(--preview-bg,#171a20); }
.theme-card::before,.theme-card::after { content:""; position:absolute; pointer-events:none; }
.theme-card::before { inset:0; background:var(--preview-art); opacity:.9; }
.theme-card::after { inset:auto .7rem .7rem auto; width:2.15rem; aspect-ratio:1; border:1px solid var(--preview-accent); border-radius:50%; background:color-mix(in srgb,var(--preview-accent) 30%,transparent); }
.theme-card strong,.theme-card small { position:relative; z-index:1; }
.theme-card strong { font-size:1rem; }
.theme-card small { margin-top:.18rem; color:var(--preview-muted,#bbb6ac); }
.theme-card.is-selected { border-color:var(--accent); box-shadow:0 0 0 3px var(--accent-soft); }
.theme-graphite-gold { --preview-bg:#121418; --preview-text:#f3efe7; --preview-muted:#b9b2a6; --preview-accent:#d4ad4f; --preview-art:linear-gradient(126deg,transparent 0 45%,rgba(226,196,101,.55) 45.4% 46%,transparent 46.4%),linear-gradient(30deg,transparent 0 69%,rgba(169,130,45,.35) 69.4% 70%,transparent 70.4%); }
.theme-midnight-violet { --preview-bg:#18111f; --preview-text:#f4eef8; --preview-muted:#bdaec7; --preview-accent:#a96ee8; --preview-art:radial-gradient(circle at 82% 20%,#9c58df 0 18%,transparent 19%),radial-gradient(circle at 58% 38%,#cf9cff 0 10%,transparent 11%); }
.theme-deep-ocean { --preview-bg:#0e1d29; --preview-text:#edf6f8; --preview-muted:#afc1c6; --preview-accent:#43a9c1; --preview-art:repeating-radial-gradient(ellipse at 110% 0,transparent 0 24px,rgba(85,180,204,.45) 25px 27px,transparent 28px 48px); }
.theme-warm-stone { --preview-bg:#ded5c7; --preview-text:#352f28; --preview-muted:#6b6257; --preview-accent:#8a6230; --preview-art:linear-gradient(145deg,rgba(255,255,255,.45),transparent 55%),linear-gradient(38deg,transparent 0 72%,rgba(117,78,35,.22) 72.5% 73%,transparent 73.5%); }
.theme-sage-paper { --preview-bg:#d7ddd1; --preview-text:#293229; --preview-muted:#5c685c; --preview-accent:#52725b; --preview-art:radial-gradient(ellipse at 85% 15%,rgba(82,114,91,.34),transparent 44%),linear-gradient(120deg,transparent 0 63%,rgba(61,91,68,.18) 63.5% 64%,transparent 64.5%); }
.theme-mist-blue { --preview-bg:#d6e0e5; --preview-text:#27333b; --preview-muted:#5e6d76; --preview-accent:#4d7085; --preview-art:repeating-linear-gradient(165deg,transparent 0 28px,rgba(77,112,133,.28) 29px 31px,transparent 32px 58px); }
.compact-settings-card { display:flex; align-items:center; justify-content:space-between; gap:1rem; }
.compact-settings-card h2 { margin:.3rem 0 .2rem; }

.triangle-layout .form-panel { min-width:0; }
.triangle-mode { margin-bottom:.55rem; }
.ev-control { margin-top:1rem; padding:1rem; border:1px solid var(--border); border-radius:17px; background:var(--surface-2); }
.form-switch-row { display:flex; align-items:flex-start; gap:.75rem; }
.form-switch-row input { width:1.2rem; height:1.2rem; margin:.18rem 0 0; accent-color:var(--accent); }
.form-switch-row strong,.form-switch-row small { display:block; }
.form-switch-row small { margin-top:.12rem; color:var(--text-muted); }
.ev-control .field { margin-top:.8rem; }
.triangle-settings-grid { display:grid; grid-template-columns:repeat(3,minmax(0,1fr)); gap:.75rem; }
.triangle-setting { min-width:0; padding:.8rem; border:1px solid var(--border); border-radius:17px; background:var(--surface-2); }
.triangle-setting.is-locked { border-color:var(--border-strong); }
.triangle-setting.is-auto { border-color:var(--accent-medium); background:var(--accent-soft); }
.triangle-setting-head { display:flex; align-items:flex-start; justify-content:space-between; gap:.5rem; margin-bottom:.65rem; }
.triangle-setting-head span,.triangle-setting-head small { display:block; }
.triangle-setting-head span { font-weight:650; }
.triangle-setting-head small { margin-top:.08rem; color:var(--text-muted); font-size:.72rem; }
.lock-button { width:2.25rem; height:2.25rem; flex:0 0 auto; display:grid; place-items:center; border:1px solid var(--border); border-radius:11px; background:var(--surface-1); color:var(--text-secondary); }
.triangle-setting.is-locked .lock-button { color:var(--accent-bright); border-color:var(--accent-medium); }
.triangle-setting select:disabled { opacity:.68; cursor:not-allowed; }
.triangle-reset { margin-top:1rem; }
.exposure-status { display:grid; gap:.2rem; margin-top:.8rem; padding:1rem; border:1px solid var(--border); border-radius:16px; background:var(--surface-2); }
.exposure-status.is-on-target { border-color:color-mix(in srgb,var(--success) 45%,var(--border)); background:color-mix(in srgb,var(--success) 10%,var(--surface-2)); }
.exposure-status span { color:var(--text-secondary); font-size:.84rem; }

@media (max-width:820px) {
  :root { --mobile-nav-height:78px; }
  .mobile-nav { grid-template-columns:repeat(6,minmax(0,1fr)); }
  .mobile-nav button { min-width:0; padding:.45rem .1rem; font-size:.58rem; }
  .mobile-nav button span:last-child { max-width:100%; overflow:hidden; text-overflow:ellipsis; }
  .home-kit { margin-top:.75rem; }
  .offline-strip { margin-right:0; }
}
@media (max-width:700px) {
  .tool-grid,.theme-grid,.triangle-settings-grid { grid-template-columns:1fr; }
  .compact-settings-card { align-items:flex-start; flex-direction:column; }
}
@media (max-width:520px) {
  .corrected-settings-grid { grid-template-columns:1fr 1fr; }
  .theme-grid { grid-template-columns:repeat(2,minmax(0,1fr)); }
  .theme-card { min-height:7.8rem; padding:.8rem; }
}