:root {
  color-scheme: light;
  --ink: #10283f;
  --ink-2: #334c63;
  --muted: #6c8193;
  --line: #d8e2e9;
  --line-strong: #bccbd6;
  --surface: #ffffff;
  --surface-2: #f3f7f9;
  --navy: #0b1f33;
  --blue: #0878b9;
  --blue-bright: #25a9e0;
  --blue-soft: #e9f6fc;
  --green: #128266;
  --green-soft: #e4f5ef;
  --amber: #b7791f;
  --amber-soft: #fff6dd;
  --red: #c2413a;
  --red-soft: #fff0ee;
  --shadow: 0 14px 34px rgba(14, 40, 63, .08);
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body { margin: 0; min-width: 320px; background: #edf3f6; color: var(--ink); font-size: 16px; line-height: 1.45; }
button, input { font: inherit; }
button { cursor: pointer; }
sub { line-height: 0; }

.topbar {
  min-height: 92px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  padding: 18px clamp(20px, 4vw, 64px);
  color: #fff;
  background:
    linear-gradient(115deg, rgba(37, 169, 224, .12), transparent 35%),
    linear-gradient(90deg, #091a2b, #0d2a43 65%, #0b2137);
  border-bottom: 3px solid #25a9e0;
}

.brand { display: flex; align-items: center; gap: 14px; }
.brand-mark { width: 48px; height: 48px; display: grid; place-items: center; border: 1px solid rgba(255,255,255,.2); background: rgba(255,255,255,.06); border-radius: 10px; }
.brand-mark svg { width: 32px; height: 32px; fill: #49bced; }
.eyebrow, .section-kicker { margin: 0 0 3px; font-size: .72rem; font-weight: 800; letter-spacing: .14em; }
.brand .eyebrow { color: #7ad4f7; }
.brand h1 { margin: 0; font-size: clamp(1.25rem, 2vw, 1.6rem); line-height: 1.15; font-weight: 720; letter-spacing: -.02em; }
.top-status { display: inline-flex; align-items: center; gap: 9px; padding: 8px 13px; border: 1px solid rgba(255,255,255,.18); border-radius: 999px; color: #d8eaf4; font-size: .82rem; font-weight: 650; }
.top-status span { width: 8px; height: 8px; border-radius: 50%; background: #7791a3; box-shadow: 0 0 0 4px rgba(119,145,163,.15); }
.top-status.active span { background: #45d4ad; box-shadow: 0 0 0 4px rgba(69,212,173,.15); }

.state-tabs { display: flex; gap: 8px; padding: 12px clamp(20px, 4vw, 64px); background: #fff; border-bottom: 1px solid var(--line); box-shadow: 0 4px 14px rgba(11,31,51,.04); }
.state-tabs button { min-height: 42px; display: inline-flex; align-items: center; gap: 9px; padding: 8px 15px; color: var(--ink-2); background: var(--surface-2); border: 1px solid var(--line); border-radius: 8px; font-size: .84rem; font-weight: 740; }
.state-tabs button span { width: 25px; height: 25px; display: grid; place-items: center; color: var(--blue); background: #fff; border: 1px solid #b8dce9; border-radius: 6px; font-family: Cambria, Georgia, serif; }
.state-tabs button.active { color: #fff; background: var(--navy); border-color: var(--navy); }
.state-tabs button.active span { color: var(--navy); border-color: #fff; }
body[data-active-page="data"] [data-page="ttgh1"], body[data-active-page="data"] [data-page="ttgh2"],
body[data-active-page="ttgh1"] [data-page="data"], body[data-active-page="ttgh1"] [data-page="ttgh2"],
body[data-active-page="ttgh2"] [data-page="data"], body[data-active-page="ttgh2"] [data-page="ttgh1"] { display: none !important; }
.page-hidden { display: none !important; }

.workspace { width: min(1560px, 100%); margin: 0 auto; padding: 30px clamp(16px, 3vw, 44px) 64px; display: grid; grid-template-columns: 250px minmax(0, 1fr) 340px; gap: 22px; align-items: start; }
.workflow-sidebar { position: sticky; top: 20px; min-width: 0; }
.main-column { min-width: 0; display: grid; gap: 20px; }
.result-column { position: sticky; top: 20px; display: grid; gap: 18px; }
.panel, .result-card, .reference-card { background: var(--surface); border: 1px solid var(--line); box-shadow: var(--shadow); }
.panel { padding: clamp(20px, 3vw, 30px); border-radius: 14px; }
.section-heading { display: flex; align-items: flex-start; justify-content: space-between; gap: 16px; margin-bottom: 25px; }
.section-heading.compact { margin-bottom: 17px; }
.section-kicker { color: var(--blue); }
.section-heading h2, .result-header h2 { margin: 0; font-size: 1.25rem; line-height: 1.25; letter-spacing: -.02em; }
.text-button { padding: 3px 0; color: var(--muted); background: transparent; border: 0; border-bottom: 1px solid var(--line-strong); font-size: .84rem; }
.text-button:hover { color: var(--blue); border-color: var(--blue); }
.edit-note { color: var(--muted); font-size: .8rem; }

.input-group + .input-group { margin-top: 26px; padding-top: 24px; border-top: 1px solid var(--line); }
.input-group h3 { margin: 0 0 13px; color: var(--ink-2); font-size: .84rem; font-weight: 750; }
.field-grid { display: grid; gap: 14px; }
.field-grid.three { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.field-grid.two { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.field-grid.four { grid-template-columns: repeat(4, minmax(0, 1fr)); }
.field-grid.loads { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.field { display: grid; gap: 7px; min-width: 0; }
.field > span:first-child { color: var(--ink-2); font-size: .83rem; font-weight: 650; }
.field > span b { color: var(--blue); }
.input-shell { min-height: 43px; display: flex; align-items: center; overflow: hidden; background: #fff; border: 1px solid var(--line-strong); border-radius: 7px; transition: border-color .15s, box-shadow .15s; }
.input-shell:focus-within { border-color: var(--blue); box-shadow: 0 0 0 3px rgba(8,120,185,.12); }
.input-shell input { min-width: 0; flex: 1; height: 41px; padding: 9px 10px; border: 0; outline: 0; color: var(--ink); background: transparent; font-weight: 680; }
.input-shell i { flex: none; padding: 0 10px; color: var(--muted); border-left: 1px solid var(--line); font-size: .72rem; font-style: normal; }

.choice-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 14px; }
.choice-card { position: relative; min-height: 92px; display: grid; grid-template-columns: 44px 1fr 16px; align-items: center; gap: 12px; padding: 16px; text-align: left; color: var(--ink); background: #fff; border: 1px solid var(--line-strong); border-radius: 10px; transition: .18s ease; }
.choice-card:hover { transform: translateY(-1px); border-color: #77bddd; box-shadow: 0 8px 20px rgba(14, 74, 106, .08); }
.choice-card.selected { border-color: var(--blue); background: var(--blue-soft); box-shadow: inset 0 0 0 1px var(--blue); }
.choice-icon { width: 44px; height: 44px; display: grid; place-items: center; color: var(--blue); background: #e9f5fa; border-radius: 9px; }
.choice-icon svg { width: 27px; height: 27px; fill: none; stroke: currentColor; stroke-width: 1.8; stroke-linecap: round; }
.choice-card strong { display: block; margin-bottom: 4px; font-size: .96rem; }
.choice-card small { display: block; color: var(--muted); font-size: .76rem; line-height: 1.35; }
.radio-dot { width: 15px; height: 15px; border: 1.5px solid #9eb0bc; border-radius: 50%; }
.selected .radio-dot { border: 4px solid var(--blue); }

.conditional-block { margin-top: 22px; padding-top: 22px; border-top: 1px solid var(--line); }
.subsection-title { display: flex; align-items: baseline; justify-content: space-between; gap: 12px; margin-bottom: 14px; }
.subsection-title span { font-size: .86rem; font-weight: 760; }
.subsection-title small { color: var(--muted); font-size: .74rem; }
.segmented { display: inline-flex; padding: 4px; margin-bottom: 18px; background: #edf3f6; border: 1px solid var(--line); border-radius: 8px; }
.segmented button { min-width: 112px; padding: 8px 14px; color: var(--ink-2); background: transparent; border: 0; border-radius: 5px; font-size: .84rem; font-weight: 680; }
.segmented button.selected { color: #fff; background: var(--navy); box-shadow: 0 3px 8px rgba(11,31,51,.18); }
.soil-preset { display: flex; align-items: center; justify-content: space-between; gap: 18px; margin-bottom: 17px; padding: 14px 15px; background: #edf6fa; border: 1px solid #c5dfe9; border-left: 4px solid var(--blue); border-radius: 9px; }
.soil-preset strong, .soil-preset small { display: block; }
.soil-preset strong { font-size: .88rem; }
.soil-preset small { margin-top: 3px; color: var(--muted); font-size: .74rem; }
.soil-preset .segmented { flex: none; margin: 0; background: #fff; }

.sand-branch { margin-top: 16px; padding: 17px; border: 1px solid #b9ddcf; border-left: 4px solid var(--green); border-radius: 9px; background: #f4fbf8; }
.sand-branch.layer-two { border-color: #efd59a; border-left-color: var(--amber); background: #fffbf0; }
.branch-heading { display: flex; align-items: flex-start; justify-content: space-between; gap: 14px; margin-bottom: 14px; }
.branch-heading h3 { margin: 2px 0 0; font-size: .9rem; }
.branch-heading small { max-width: 330px; color: var(--muted); font-size: .75rem; text-align: right; }
.branch-index { color: var(--green); font-size: .68rem; font-weight: 820; letter-spacing: .12em; }
.layer-two .branch-index { color: var(--amber); }
.required-field > small { color: #8b641d; font-size: .72rem; }
.derived-soil-value { color: var(--muted); font-size: .72rem; line-height: 1.4; }
.derived-soil-value strong { color: var(--blue); font-size: .76rem; }

.coefficient-grid { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 12px; }
.coefficient-grid .field { gap: 6px; padding: 13px; background: var(--surface-2); border: 1px solid var(--line); border-radius: 8px; }
.coefficient-grid .field > span:first-child { font-size: .9rem; }
.coefficient-grid em { display: block; margin-top: 3px; color: var(--muted); font-size: .68rem; font-style: normal; font-weight: 500; }
.coefficient-grid input { width: 100%; height: 38px; padding: 7px 9px; color: var(--ink); background: #fff; border: 1px solid var(--line-strong); border-radius: 6px; outline: 0; font-weight: 700; }
.coefficient-grid input:focus { border-color: var(--blue); box-shadow: 0 0 0 3px rgba(8,120,185,.1); }
.coefficient-grid .input-shell { min-height: 38px; }
.coefficient-grid .input-shell input { height: 36px; border: 0; box-shadow: none; }
.ttgh-card { margin-top: 20px; padding: 18px; background: linear-gradient(135deg, #f1f8fb, #f8fbfc); border: 1px solid #bfdce9; border-left: 4px solid var(--blue); border-radius: 9px; }
.ttgh-title { display: flex; align-items: center; justify-content: space-between; gap: 12px; margin-bottom: 15px; font-size: .86rem; font-weight: 770; }
.source-pill, .range-badge { display: inline-flex; align-items: center; min-height: 28px; padding: 5px 9px; color: #075e8d; background: #dff2fa; border: 1px solid #b8deee; border-radius: 999px; font-size: .7rem; font-weight: 760; }

.suggestions-panel { border-top: 4px solid var(--blue); }
.weak-layer-panel { padding: 0; overflow: hidden; border-top: 4px solid var(--navy); }
.weak-layer-toggle { width: 100%; display: flex; align-items: center; justify-content: space-between; gap: 16px; padding: 21px 24px; color: var(--ink); text-align: left; background: #fff; border: 0; }
.weak-layer-toggle:hover { background: #f6fafc; }
.weak-layer-toggle span small, .weak-layer-toggle span strong { display: block; }
.weak-layer-toggle span small { margin-bottom: 4px; color: var(--blue); font-size: .68rem; font-weight: 800; letter-spacing: .1em; }
.weak-layer-toggle span strong { font-size: 1rem; }
.weak-layer-toggle svg { width: 20px; flex: none; fill: none; stroke: var(--ink-2); stroke-width: 1.8; transition: transform .2s; }
.weak-layer-toggle.open svg { transform: rotate(180deg); }
.weak-layer-body { padding: 20px 24px 24px; border-top: 1px solid var(--line); }
.weak-layer-guidance { margin: 0; padding: 12px 14px; color: var(--muted); background: var(--surface-2); border-radius: 7px; font-size: .82rem; }
.weak-calculate { margin-top: 16px; }
.proposal-toolbar { display: flex; justify-content: space-between; align-items: center; gap: 16px; padding: 13px; background: var(--surface-2); border: 1px solid var(--line); border-radius: 9px; }
.lock-controls { display: flex; align-items: center; gap: 8px; flex-wrap: wrap; }
.lock-controls > span { margin-right: 3px; color: var(--muted); font-size: .76rem; font-weight: 650; }
.lock-controls button { min-width: 68px; padding: 7px 12px; color: var(--ink-2); background: #fff; border: 1px solid var(--line-strong); border-radius: 6px; font-size: .8rem; font-weight: 720; }
.lock-controls button.active { color: #fff; background: var(--navy); border-color: var(--navy); }
.primary-button { min-height: 42px; display: inline-flex; align-items: center; justify-content: center; gap: 8px; padding: 10px 16px; color: #fff; background: var(--blue); border: 0; border-radius: 7px; box-shadow: 0 7px 15px rgba(8,120,185,.2); font-size: .84rem; font-weight: 760; }
.primary-button:hover { background: #05679f; }
.primary-button svg { width: 18px; fill: none; stroke: currentColor; stroke-width: 2; stroke-linecap: round; stroke-linejoin: round; }
.preliminary-actions { display: flex; justify-content: flex-end; margin-top: 20px; padding-top: 18px; border-top: 1px solid var(--line); }
.proposal-message { margin: 17px 2px 11px; color: var(--muted); font-size: .8rem; }
.proposal-list { display: grid; gap: 8px; }
.proposal-row { display: grid; grid-template-columns: 38px repeat(3, minmax(62px, .7fr)) 1fr 96px; align-items: center; gap: 10px; padding: 11px 12px; border: 1px solid var(--line); border-radius: 8px; transition: .15s; }
.proposal-row:hover { border-color: #8fc9e2; background: #f7fbfd; }
.proposal-rank { width: 27px; height: 27px; display: grid; place-items: center; color: var(--muted); background: var(--surface-2); border-radius: 6px; font-size: .72rem; font-weight: 780; }
.proposal-dim span, .proposal-u span { display: block; color: var(--muted); font-size: .65rem; text-transform: uppercase; letter-spacing: .06em; }
.proposal-dim strong { font-size: .89rem; }
.proposal-u strong { color: var(--green); font-size: .92rem; }
.proposal-u small { display: block; margin-top: 2px; color: var(--blue); font-size: .68rem; font-weight: 720; }
.choose-option { padding: 7px 10px; color: var(--blue); background: #fff; border: 1px solid #8fc9e2; border-radius: 6px; font-size: .76rem; font-weight: 720; }
.choose-option:hover { color: #fff; background: var(--blue); }

.result-card { overflow: hidden; border-radius: 14px; }
.result-header { display: flex; align-items: flex-start; justify-content: space-between; gap: 10px; padding: 22px 22px 17px; background: var(--navy); color: #fff; }
.result-header .section-kicker { color: #68c9ef; }
.result-state { flex: none; padding: 5px 8px; border-radius: 5px; font-size: .67rem; font-weight: 760; }
.result-state.neutral { color: #c4d5df; background: rgba(255,255,255,.08); }
.result-state.optimal { color: #84f0d0; background: rgba(35,179,137,.16); }
.result-state.reserve { color: #ffe09b; background: rgba(225,167,55,.15); }
.result-state.fail { color: #ffaaa4; background: rgba(220,77,68,.17); }
.gauge-wrap { padding: 27px 22px 8px; }
.gauge-value { display: flex; align-items: baseline; gap: 4px; margin-bottom: 15px; }
.gauge-value strong { font-size: 2.6rem; line-height: 1; letter-spacing: -.055em; }
.gauge-value span { color: var(--muted); font-size: 1rem; font-weight: 750; }
.gauge-track { position: relative; height: 12px; overflow: visible; background: linear-gradient(90deg, #e6eef2 0 70.83%, #ccebdd 70.83% 83.33%, #f4d1ce 83.33%); border-radius: 99px; }
.gauge-track > span { position: absolute; inset: 0 auto 0 0; width: 0; background: var(--blue); border-radius: 99px; transition: width .35s ease, background .2s; }
.gauge-track .threshold { position: absolute; top: -4px; bottom: -4px; width: 1px; background: #7b909e; opacity: .8; }
.gauge-track .at-85 { left: 70.83%; }
.gauge-track .at-100 { left: 83.33%; }
.gauge-labels { display: flex; justify-content: space-between; margin-top: 7px; color: #8093a1; font-size: .62rem; }
.condition-formula { margin: 9px 22px 0; padding: 11px; color: var(--ink-2); background: var(--surface-2); border: 1px solid var(--line); border-radius: 7px; text-align: center; font-family: Cambria, Georgia, serif; font-size: .9rem; }
.result-explanation { min-height: 42px; margin: 13px 22px 19px; color: var(--muted); font-size: .8rem; }
.adjustment-card { margin: 0 22px 20px; padding: 16px; background: linear-gradient(145deg, #fff8e8, #fffdf8); border: 1px solid #efd69b; border-left: 4px solid var(--amber); border-radius: 9px; }
.adjustment-heading { display: flex; align-items: flex-start; justify-content: space-between; gap: 10px; margin-bottom: 14px; }
.adjustment-heading > div > span { display: block; margin-bottom: 2px; color: var(--red); font-size: .75rem; font-weight: 800; letter-spacing: .08em; }
.adjustment-heading h3 { margin: 0; font-size: .87rem; }
.safety-pill { flex: none; padding: 4px 7px; color: #8a5b13; background: #fff0c8; border: 1px solid #edd395; border-radius: 999px; font-size: .75rem; font-weight: 750; }
.adjustment-equation { display: grid; grid-template-columns: auto auto 18px auto auto; align-items: center; gap: 6px; padding: 10px; color: var(--ink-2); background: rgba(255,255,255,.65); border: 1px solid #efdfb8; border-radius: 7px; font-size: .75rem; }
.adjustment-equation strong { font-family: Cambria, Georgia, serif; font-size: .8rem; }
.adjustment-equation strong i { font-style: normal; }
.equation-arrow { color: var(--amber); text-align: center; font-weight: 800; }
.adjustment-steps { display: grid; gap: 7px; margin-top: 10px; }
.adjustment-steps > div { padding: 9px 10px; background: rgba(255,255,255,.72); border: 1px solid #efdfb8; border-radius: 7px; }
.adjustment-steps span { display: block; margin-bottom: 3px; color: #826b42; font-size: .75rem; font-weight: 720; }
.adjustment-steps code, .recheck-formula { display: block; color: var(--ink); font-family: Cambria, Georgia, serif; font-size: .8rem; line-height: 1.5; white-space: normal; overflow-wrap: anywhere; }
.adjustment-dimensions { display: grid; grid-template-columns: 1fr 1fr; gap: 9px; margin-top: 10px; }
.adjustment-dimensions > div { padding: 10px; background: #fff; border: 1px solid #ead8ae; border-radius: 7px; }
.adjustment-dimensions span { display: block; color: var(--muted); font-size: .75rem; font-weight: 720; }
.adjustment-dimensions strong { display: block; margin-top: 2px; color: var(--ink); font-size: 1rem; }
.adjustment-dimensions small { display: block; margin-top: 3px; color: var(--muted); font-size: .75rem; }
.recheck-row { display: flex; align-items: center; justify-content: space-between; gap: 10px; margin-top: 11px; padding-top: 11px; border-top: 1px solid #ead8ae; }
.recheck-row span { display: block; color: var(--muted); font-size: .75rem; }
.recheck-row strong { color: var(--green); font-size: .88rem; }
.recheck-row strong.still-fail { color: var(--red); }
.recheck-row strong.adjusted-reserve { color: var(--amber); }
.recheck-row button { flex: none; padding: 8px 10px; color: #fff; background: var(--amber); border: 0; border-radius: 6px; font-size: .75rem; font-weight: 760; }
.recheck-row button:hover { background: #956015; }
.recheck-formula { margin-top: 9px; padding: 9px 10px; color: #5f4d2e; background: rgba(255,255,255,.72); border: 1px solid #efdfb8; border-radius: 7px; }
.adjustment-card > p { margin: 10px 0 0; color: #826b42; font-size: .75rem; line-height: 1.4; }
.key-metrics { display: grid; grid-template-columns: repeat(2, 1fr); border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); }
.key-metrics > div { padding: 15px 20px; }
.key-metrics > div + div { border-left: 1px solid var(--line); }
.key-metrics span { display: block; color: var(--muted); font-size: .71rem; font-weight: 720; }
.key-metrics strong { display: inline-block; margin: 4px 5px 0 0; font-size: 1.08rem; }
.key-metrics small { color: var(--muted); font-size: .65rem; }
.underlying-result { margin: 16px 0 0; padding: 15px; background: #f4f9fb; border: 1px solid #c8dde7; border-left: 4px solid var(--blue); border-radius: 9px; }
.underlying-heading { display: flex; align-items: flex-start; justify-content: space-between; gap: 12px; }
.underlying-heading span { display: block; color: var(--blue); font-size: .66rem; font-weight: 800; letter-spacing: .08em; }
.underlying-heading h3 { margin: 3px 0 0; font-size: .86rem; }
.underlying-state { flex: none; padding: 5px 8px; border-radius: 5px; font-size: .68rem; }
.underlying-state.neutral { color: var(--muted); background: #e8eff3; }
.underlying-state.pass { color: #08705a; background: var(--green-soft); }
.underlying-state.fail { color: var(--red); background: var(--red-soft); }
.underlying-result > p { margin: 11px 0 0; color: var(--muted); font-family: Cambria, Georgia, serif; font-size: .8rem; }
.underlying-metrics { display: grid; grid-template-columns: repeat(3, 1fr); gap: 8px; margin-top: 12px; }
.underlying-metrics > div { padding: 10px; background: #fff; border: 1px solid var(--line); border-radius: 7px; }
.underlying-metrics span, .underlying-metrics small { display: block; color: var(--muted); font-size: .67rem; }
.underlying-metrics strong { display: block; margin: 3px 0; font-size: .92rem; }
.info-button { width: 18px; height: 18px; display: inline-grid; place-items: center; padding: 0; color: var(--blue); background: #eef7fb; border: 1px solid #9bcde1; border-radius: 50%; font-family: Georgia, serif; font-size: .7rem; font-weight: 800; font-style: italic; line-height: 1; vertical-align: middle; }
.info-button:hover, .info-button[aria-expanded="true"] { color: #fff; background: var(--blue); border-color: var(--blue); }
.symbol-popover { position: fixed; z-index: 50; width: min(300px, calc(100vw - 16px)); padding: 13px 14px; color: #fff; background: var(--navy); border: 1px solid #24445e; border-radius: 9px; box-shadow: 0 14px 34px rgba(0,0,0,.24); }
.symbol-popover strong, .symbol-popover small { display: block; }
.symbol-popover strong { color: #7ad4f7; font-family: Cambria, Georgia, serif; font-size: .92rem; }
.symbol-popover p { margin: 6px 0; color: #edf6fa; font-size: .8rem; line-height: 1.45; }
.symbol-popover small { color: #bcd1de; font-size: .72rem; }
.calculation-details summary { display: flex; align-items: center; justify-content: space-between; padding: 16px 21px; color: var(--ink-2); cursor: pointer; list-style: none; font-size: .78rem; font-weight: 720; }
.calculation-details summary::-webkit-details-marker { display: none; }
.calculation-details summary svg { width: 17px; fill: none; stroke: currentColor; stroke-width: 1.7; transition: transform .2s; }
.calculation-details[open] summary svg { transform: rotate(180deg); }
.detail-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1px; padding: 1px; background: var(--line); border-top: 1px solid var(--line); }
.detail-grid div { padding: 12px; background: #fff; }
.detail-grid span { display: block; color: var(--muted); font-size: .67rem; }
.detail-grid strong { display: block; margin-top: 3px; font-size: .78rem; }
.formula-sheet { padding: 0 14px 15px; border-top: 1px solid var(--line); }
.formula-sheet section { padding: 14px 0; }
.formula-sheet section + section { border-top: 1px solid var(--line); }
.formula-sheet h4 { margin: 0 0 8px; color: var(--blue); font-size: .78rem; }
.formula-sheet code { display: block; padding: 8px 9px; color: var(--ink-2); background: var(--surface-2); border-left: 3px solid #b8dce9; font-family: Cambria, Georgia, serif; font-size: .78rem; line-height: 1.5; white-space: normal; overflow-wrap: anywhere; }
.formula-sheet code + code { margin-top: 6px; }
.formula-sheet .formula-final code { color: #0c614d; background: #edf8f4; border-left-color: var(--green); font-weight: 700; }
.reference-card { padding: 18px 20px; border-radius: 12px; box-shadow: none; }
.reference-card h3 { margin: 0 0 14px; font-size: .83rem; }
.legend-row { display: grid; grid-template-columns: 10px 1fr; gap: 10px; align-items: start; }
.legend-row + .legend-row { margin-top: 12px; }
.legend { width: 9px; height: 9px; margin-top: 4px; border-radius: 2px; }
.legend.reserve { background: #e7ad3a; }
.legend.optimal { background: #1ca57c; }
.legend.fail { background: #d85049; }
.legend-row strong, .legend-row small { display: block; }
.legend-row strong { font-size: .72rem; }
.legend-row small { margin-top: 2px; color: var(--muted); font-size: .68rem; line-height: 1.35; }

.workflow-dashboard { padding: 19px; background: var(--navy); border: 1px solid #24445e; border-radius: 13px; box-shadow: var(--shadow); }
.workflow-dashboard h2 { margin: 0 0 15px; color: #fff; font-size: 1.05rem; }
.workflow-dashboard .section-kicker { color: #68c9ef; }
.dashboard-buttons { display: grid; gap: 8px; }
.dashboard-buttons button { display: grid; grid-template-columns: 34px 1fr; gap: 0 9px; padding: 11px; color: #dceaf2; text-align: left; background: rgba(255,255,255,.045); border: 1px solid rgba(255,255,255,.12); border-radius: 8px; }
.dashboard-buttons button > span { grid-row: 1 / 3; width: 31px; height: 31px; display: grid; place-items: center; align-self: center; color: #7ad4f7; border: 1px solid rgba(122,212,247,.4); border-radius: 6px; font-size: .68rem; font-weight: 800; }
.dashboard-buttons button strong { font-size: .82rem; }
.dashboard-buttons button small { margin-top: 2px; color: #9fb7c7; font-size: .67rem; }
.dashboard-buttons button.active { color: #fff; background: var(--blue); border-color: #38a8d7; }
.dashboard-buttons button.active span { color: var(--navy); background: #fff; border-color: #fff; }
.dashboard-buttons button.active small { color: #e5f5fb; }
.lookup-page { min-width: 0; }
.lookup-calculator { display: grid; gap: 16px; padding: 18px; background: var(--surface-2); border: 1px solid var(--line); border-radius: 10px; }
.lookup-calculator > .primary-button { justify-self: start; }
.lookup-result { display: grid; grid-template-columns: 1fr auto; align-items: center; gap: 4px 18px; padding: 16px 18px; background: #fff; border: 1px solid var(--line); border-left: 4px solid var(--line-strong); border-radius: 8px; }
.lookup-result span { color: var(--ink-2); font-weight: 720; }
.lookup-result strong { grid-row: 1 / 3; grid-column: 2; color: var(--muted); font-family: Cambria, Georgia, serif; font-size: 2rem; }
.lookup-result small { color: var(--muted); }
.lookup-result.calculated { border-left-color: var(--green); background: var(--green-soft); }
.lookup-result.calculated strong { color: var(--green); }
.lookup-result.error { border-left-color: var(--red); background: var(--red-soft); }
.lookup-formula { padding: 12px 14px; overflow-x: auto; color: var(--ink-2); background: #fff; border: 1px dashed var(--line-strong); border-radius: 7px; font-family: "Cambria Math", Cambria, serif; font-size: .86rem; white-space: pre-wrap; }
.lookup-reference { margin-top: 26px; }
.reference-table-wrap { max-width: 100%; overflow: auto; border: 1px solid var(--line); border-radius: 9px; }
.lookup-table { width: max-content; min-width: 100%; border-collapse: collapse; background: #fff; font-size: .76rem; }
.lookup-table th, .lookup-table td { min-width: 62px; padding: 8px 9px; text-align: center; border-right: 1px solid var(--line); border-bottom: 1px solid var(--line); white-space: nowrap; }
.lookup-table th { position: sticky; top: 0; z-index: 1; color: #fff; background: var(--navy); }
.lookup-table th:first-child, .lookup-table td:first-child { position: sticky; left: 0; z-index: 2; font-weight: 760; }
.lookup-table td:first-child { color: var(--ink-2); background: var(--surface-2); }
.lookup-table th:first-child { z-index: 3; }
.lookup-table tr:last-child td { border-bottom: 0; }
.lookup-table tr td:last-child, .lookup-table tr th:last-child { border-right: 0; }
.lookup-table .lookup-bound { background: #dff4eb; color: #0b6b52; font-weight: 800; }
.lookup-table.compact { width: 100%; max-width: 620px; }
.bearing-lookup-results { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 10px; }
.bearing-lookup-results > div { padding: 14px; text-align: center; background: #fff; border: 1px solid var(--line); border-radius: 8px; }
.bearing-lookup-results span { display: block; color: var(--muted); font-size: .8rem; }
.bearing-lookup-results strong { display: block; margin-top: 4px; color: var(--muted); font-family: Cambria, Georgia, serif; font-size: 1.45rem; }
.bearing-lookup-results.calculated > div { border-color: #a9d8c9; background: var(--green-soft); }
.bearing-lookup-results.calculated strong { color: var(--green); }
.finalize-row { display: flex; align-items: center; justify-content: flex-end; gap: 16px; margin-top: 20px; padding-top: 18px; border-top: 1px solid var(--line); }
.finalize-warning { flex: 1; margin: 0; padding: 10px 12px; color: #8d3b35; background: var(--red-soft); border: 1px solid #efc5c0; border-radius: 7px; font-size: .8rem; }
.data-status-card p { margin: 0; color: var(--muted); font-size: .76rem; line-height: 1.5; }
.input-recap { padding-block: 20px; border-left: 4px solid var(--blue); }
body[data-active-page="ttgh1"] #ttgh1Recap { order: -3; }
body[data-active-page="ttgh1"] #limitStatePanel { order: -1; }
.recap-grid { display: grid; grid-template-columns: repeat(6, minmax(90px, 1fr)); gap: 8px; }
.recap-grid > div { padding: 9px 10px; background: var(--surface-2); border: 1px solid var(--line); border-radius: 7px; }
.recap-grid span, .recap-grid small { display: block; color: var(--muted); font-size: .65rem; }
.recap-grid strong { display: inline-block; margin: 2px 4px 0 0; font-size: .8rem; }
.prerequisite-warning { display: grid; gap: 3px; margin-top: 13px; padding: 11px 13px; color: #765313; background: var(--amber-soft); border: 1px solid #ecd597; border-left: 4px solid var(--amber); border-radius: 7px; }
.prerequisite-warning strong { font-size: .78rem; }
.prerequisite-warning span { font-size: .72rem; line-height: 1.4; }
.calculated-output-block { margin-top: 20px; padding-top: 19px; border-top: 1px solid var(--line); }
.calculated-output-grid { display: grid; grid-template-columns: repeat(4, minmax(110px, 1fr)); gap: 9px; }
.calculated-output-grid > div { padding: 12px; color: var(--muted); background: #f7f9fa; border: 1px solid var(--line); border-radius: 8px; transition: .18s; }
.calculated-output-grid span, .calculated-output-grid small { display: block; font-size: .67rem; }
.calculated-output-grid strong { display: inline-block; margin: 3px 4px 0 0; color: #8999a5; font-size: .94rem; }
.calculated-output-grid > div.calculated { color: #0b6c55; background: var(--green-soft); border-color: #9dd8c5; box-shadow: inset 3px 0 var(--green); }
.calculated-output-grid > div.calculated strong { color: #075e49; }
.geology-note { margin: 10px 0 0; color: var(--muted); font-size: .74rem; }

.settlement-panel { border-top: 4px solid var(--blue); }
.mesh-actions, .geology-actions { display: flex; align-items: center; gap: 9px; margin-top: 12px; flex-wrap: wrap; }
.mesh-actions button, .geology-actions button { padding: 8px 12px; color: var(--blue); background: #fff; border: 1px solid #8fc9e2; border-radius: 6px; font-size: .76rem; font-weight: 720; }
.mesh-actions button:hover, .geology-actions button:hover { color: #fff; background: var(--blue); }
.sand-settlement-assumptions { display: grid; grid-template-columns: minmax(200px, 1fr) repeat(2, minmax(180px, .7fr)); align-items: end; gap: 14px; margin: 20px 0; padding: 16px; background: #f1f8fb; border: 1px solid #bfdce9; border-left: 4px solid var(--blue); border-radius: 9px; }
.sand-settlement-assumptions > div { align-self: center; }
.sand-settlement-assumptions strong, .sand-settlement-assumptions small { display: block; }
.sand-settlement-assumptions small { margin-top: 4px; color: var(--muted); font-size: .74rem; }
.geology-editor { margin-top: 22px; padding-top: 20px; border-top: 1px solid var(--line); }
.geology-head, .geology-row { display: grid; grid-template-columns: 70px 176px repeat(5, minmax(100px, 1fr)) 34px; gap: 8px; align-items: center; }
.geology-head { padding: 0 8px 7px; color: var(--muted); font-size: .68rem; font-weight: 720; text-align: center; }
.geology-row { margin-bottom: 8px; padding: 9px 8px; background: var(--surface-2); border: 1px solid var(--line); border-radius: 8px; }
.geology-row > strong { color: var(--blue); font-size: .78rem; }
.geology-row label { min-width: 0; display: flex; align-items: center; background: #fff; border: 1px solid var(--line-strong); border-radius: 6px; overflow: hidden; }
.layer-type-buttons { display: grid; grid-template-columns: 1fr 1fr; gap: 5px; }
.layer-type-buttons button { min-height: 38px; padding: 6px 5px; color: var(--ink-2); background: #fff; border: 1px solid var(--line-strong); border-radius: 6px; font-size: .69rem; font-weight: 720; }
.layer-type-buttons button.active { color: #fff; background: var(--blue); border-color: var(--blue); box-shadow: 0 2px 8px rgba(9,105,151,.18); }
.soil-code { grid-column: 2; margin-top: -6px; padding: 0 4px !important; color: var(--blue) !important; font-weight: 750; text-align: center; }
.layer-h { grid-column: 3; }.layer-gamma { grid-column: 4; }.gamma-prime-field { grid-column: 5; }.layer-modulus-primary { grid-column: 6; }.layer-modulus-secondary { grid-column: 7; }
.layer-selection-hint { grid-column: 3 / -1; padding: 0 !important; }
.geology-row label > span { display: none; }
.geology-row .dynamic-info { flex: none; margin-left: 5px; }
.geology-row input { width: 100%; min-width: 0; height: 38px; padding: 7px 8px; color: var(--ink); background: transparent; border: 0; outline: 0; font-weight: 680; }
.geology-row input:disabled { color: var(--muted); background: #edf1f3; }
.geology-row small { flex: none; padding-right: 7px; color: var(--muted); font-size: .61rem; }
.geology-row .layer-warning { grid-column: 1 / -1; padding: 2px 4px 0; color: #9a6815; font-size: .68rem; font-weight: 700; }
.assignment-lookup { display: grid; grid-template-columns: minmax(220px, 1fr) minmax(150px, .45fr) auto; gap: 14px; align-items: end; margin-bottom: 20px; padding: 16px; background: #eef7fb; border: 1px solid #b9dce9; border-left: 4px solid var(--blue); border-radius: 9px; }
.assignment-lookup h3 { margin: 2px 0; }.assignment-lookup small { color: var(--muted); font-size: .72rem; }.assignment-code { margin: 0; }
.assignment-status { grid-column: 1 / -1; margin: 0; color: var(--muted); font-size: .75rem; }.assignment-status.success { color: #087054; font-weight: 700; }.assignment-status.error { color: var(--red); font-weight: 700; }
.remove-layer { width: 30px; height: 30px; color: var(--red); background: var(--red-soft); border: 1px solid #efb9b5; border-radius: 6px; font-size: 1rem; }
.remove-layer:disabled { opacity: .35; }
.geology-actions { justify-content: space-between; }
.geology-actions label { color: var(--ink-2); font-size: .78rem; font-weight: 680; }
.settlement-calculate { margin-top: 20px; }
.settlement-message { margin: 12px 0 0; color: var(--muted); font-size: .8rem; }
.settlement-table-wrap { margin-top: 18px; overflow-x: auto; border: 1px solid var(--line); border-radius: 9px; }
.settlement-table { width: 100%; min-width: 1220px; border-collapse: collapse; font-variant-numeric: tabular-nums; }
.settlement-table th { padding: 10px 7px; color: #fff; background: var(--navy); font-size: .68rem; font-weight: 720; white-space: nowrap; }
.settlement-table td { padding: 8px 7px; border-bottom: 1px solid var(--line); color: var(--ink-2); font-size: .7rem; text-align: right; white-space: nowrap; }
.settlement-table td:nth-child(1), .settlement-table td:nth-child(2) { text-align: center; }
.settlement-table tbody tr:nth-child(even) { background: #f7fafb; }
.settlement-table tbody tr.stop-row { background: #e7f6f0; box-shadow: inset 4px 0 var(--green); font-weight: 750; }
.table-info { width: 16px; height: 16px; font-size: .62rem; }
.k0-explain { margin-top: 12px; padding: 13px 14px; color: var(--ink-2); background: #edf6fa; border: 1px solid #c5dfe9; border-radius: 8px; }
.k0-explain strong { color: var(--blue); font-size: .82rem; }
.k0-explain p, .k0-explain code { display: block; margin: 5px 0 0; font-size: .76rem; line-height: 1.45; }
.settlement-hero { padding: 25px 22px 20px; }
.settlement-hero > span { display: block; color: var(--muted); font-size: .72rem; font-weight: 720; }
.settlement-hero > strong { display: inline-block; margin-top: 4px; font-size: 2.55rem; letter-spacing: -.045em; }
.settlement-hero > small { margin-left: 5px; color: var(--muted); font-weight: 700; }
.settlement-limit-line { height: 10px; margin-top: 15px; overflow: hidden; background: #e7eef2; border-radius: 99px; }
.settlement-limit-line i { display: block; width: 0; height: 100%; background: var(--blue); transition: width .3s; }
.settlement-limit-line i.pass { background: var(--green); }
.settlement-limit-line i.fail { background: var(--red); }
.settlement-hero p { margin: 12px 0 0; color: var(--muted); font-size: .8rem; }
.settlement-metrics { grid-template-columns: repeat(2, 1fr); }
.settlement-metrics > div:nth-child(3) { border-top: 1px solid var(--line); }
.settlement-metrics > div:nth-child(4) { border-top: 1px solid var(--line); border-left: 1px solid var(--line); }
.settlement-reference p { margin: 8px 0 0; color: var(--muted); font-size: .73rem; line-height: 1.45; }

.hidden { display: none !important; }
.toast { position: fixed; z-index: 20; left: 50%; bottom: 24px; transform: translate(-50%, 16px); max-width: min(420px, calc(100vw - 32px)); padding: 11px 15px; color: #fff; background: var(--navy); border-radius: 8px; box-shadow: 0 12px 30px rgba(0,0,0,.2); font-size: .8rem; font-weight: 650; opacity: 0; pointer-events: none; transition: .2s; }
.toast.show { opacity: 1; transform: translate(-50%, 0); }

@media (max-width: 1120px) {
  .workspace { grid-template-columns: 230px minmax(0, 1fr); }
  .workflow-sidebar { grid-column: 1; grid-row: 1 / span 2; }
  .main-column, .result-column { grid-column: 2; }
  .result-column { position: static; }
  .field-grid.loads { grid-template-columns: repeat(3, minmax(0, 1fr)); }
  .coefficient-grid { grid-template-columns: repeat(3, minmax(0, 1fr)); }
  .field-grid.four { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .recap-grid { grid-template-columns: repeat(4, minmax(80px, 1fr)); }
  .calculated-output-grid { grid-template-columns: repeat(3, minmax(100px, 1fr)); }
}

@media (max-width: 860px) {
  .topbar { min-height: 82px; }
  .top-status { display: none; }
  .workspace { grid-template-columns: 210px minmax(0, 1fr); padding-top: 18px; }
  .result-column { top: 12px; }
  .reference-card { display: none; }
  .result-card { box-shadow: 0 10px 28px rgba(14,40,63,.1); }
  .state-tabs { overflow-x: auto; }
  .state-tabs button { flex: none; }
  .geology-head { display: none; }
  .geology-row { grid-template-columns: 1fr 1fr; }
  .geology-row > strong { grid-column: 1 / -1; }
  .geology-row .layer-type-buttons, .geology-row .soil-code, .geology-row .layer-h, .geology-row .layer-gamma, .geology-row .gamma-prime-field, .geology-row .layer-modulus-primary, .geology-row .layer-modulus-secondary { grid-column: auto; }
  .geology-row .layer-selection-hint, .geology-row .layer-warning { grid-column: 1 / -1; }
  .geology-row label > span { display: block; padding-left: 7px; color: var(--muted); font-size: .65rem; }
  .remove-layer { grid-column: 2; justify-self: end; }
  .sand-settlement-assumptions { grid-template-columns: 1fr; }
  .recap-grid { grid-template-columns: repeat(3, minmax(75px, 1fr)); }
}

@media (max-width: 640px) {
  body { font-size: 15px; }
  .topbar { padding: 14px 16px; }
  .brand-mark { width: 42px; height: 42px; }
  .brand h1 { font-size: 1.12rem; }
  .workspace { grid-template-columns: 1fr; padding-inline: 10px; padding-bottom: 40px; gap: 14px; }
  .workflow-sidebar { position: static; grid-column: 1; grid-row: 1; }
  .main-column { grid-column: 1; grid-row: 2; }
  .result-column { grid-column: 1; grid-row: 3; }
  .workflow-dashboard { position: static; }
  .dashboard-buttons { grid-template-columns: repeat(2, 1fr); }
  .dashboard-buttons button { grid-template-columns: 28px 1fr; }
  .dashboard-buttons button small { display: none; }
  .panel { padding: 19px 15px; border-radius: 10px; }
  .section-heading { margin-bottom: 20px; }
  .choice-grid, .field-grid.two, .field-grid.three, .field-grid.loads, .field-grid.four, .coefficient-grid { grid-template-columns: 1fr 1fr; }
  .choice-grid { grid-template-columns: 1fr; }
  .assignment-lookup { grid-template-columns: 1fr; }
  .assignment-status { grid-column: 1; }
  .choice-card { min-height: 82px; }
  .subsection-title { display: block; }
  .subsection-title small { display: block; margin-top: 3px; }
  .soil-preset { align-items: stretch; flex-direction: column; }
  .soil-preset .segmented { width: 100%; }
  .soil-preset .segmented button { min-width: 0; flex: 1; }
  .branch-heading { display: block; }
  .branch-heading small { display: block; margin-top: 4px; text-align: left; }
  .proposal-toolbar { align-items: stretch; flex-direction: column; }
  .primary-button { width: 100%; }
  .proposal-row { grid-template-columns: 30px repeat(3, 1fr); gap: 7px; }
  .proposal-u { grid-column: 2 / 4; }
  .choose-option { grid-column: 4; }
  .result-header { padding: 19px 17px 15px; }
  .gauge-wrap { padding-inline: 17px; }
  .condition-formula, .result-explanation, .adjustment-card { margin-inline: 17px; }
  .weak-layer-toggle { padding: 18px 16px; }
  .weak-layer-body { padding: 17px 15px 19px; }
  .calculated-output-grid { grid-template-columns: 1fr 1fr; }
  .bearing-lookup-results { grid-template-columns: 1fr; }
  .finalize-row { align-items: stretch; flex-direction: column; }
}

@media (max-width: 390px) {
  .adjustment-equation { grid-template-columns: 1fr auto; }
  .adjustment-equation .equation-arrow { display: none; }
  .recheck-row { align-items: stretch; flex-direction: column; }
  .underlying-metrics { grid-template-columns: 1fr; }
}

@media (max-width: 430px) {
  .field-grid.two, .field-grid.three, .field-grid.loads, .field-grid.four, .coefficient-grid { grid-template-columns: 1fr; }
  .section-heading .edit-note, .range-badge { display: none; }
  .segmented { width: 100%; }
  .segmented button { min-width: 0; flex: 1; }
  .lock-controls > span { width: 100%; }
}

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