/* ==========================================================================
   Builder Ascent Field Tools - shared styles (v1)
   Loaded AFTER assets/css/style.css and reuses its design tokens
   (--surface-*, --copper*, --steel-*, --silver-*, fonts).
   Mobile-first: designed at 375-430 px, enhanced for tablet/desktop.
   Reusable by every future tool: cards, inputs, segmented controls, chips,
   result rows, data-language badges, warnings, timeline table, quick bar.
   ========================================================================== */

.ft-page {
    background-color: var(--surface-1);
    color: var(--silver-white);
    font-family: var(--font-body);
}

/* Data-language badge colours (shared by all tools) */
.ft-page {
    --ft-calc: #e2e8f0;
    --ft-calc-bg: rgba(226, 232, 240, 0.10);
    --ft-user: #e8955f;
    --ft-user-bg: rgba(196, 110, 61, 0.18);
    --ft-verify: #f6c453;
    --ft-verify-bg: rgba(246, 196, 83, 0.14);
    --ft-estimate: #7cc4ff;
    --ft-estimate-bg: rgba(124, 196, 255, 0.12);
    --ft-error: #ff8a80;
    --ft-tap: 52px;
}

.ft-sr-only {
    position: absolute !important;
    width: 1px; height: 1px;
    padding: 0; margin: -1px;
    overflow: hidden; clip: rect(0 0 0 0);
    white-space: nowrap; border: 0;
}

.ft-skip-link {
    position: absolute;
    left: 12px; top: -60px;
    z-index: 100;
    background: var(--copper);
    color: #fff;
    padding: 12px 18px;
    border-radius: 4px;
    font-weight: 700;
    text-decoration: none;
}
.ft-skip-link:focus { top: 12px; }

/* ---------- Hero ---------- */
.ft-hero {
    padding: 112px 0 28px;
    background:
        linear-gradient(to bottom, rgba(10, 14, 23, 0.72) 0%, rgba(10, 14, 23, 0.94) 100%),
        url('../../public/images/toolbox_hero_bg.png') center/cover no-repeat;
    border-bottom: 2px solid var(--copper);
}
.ft-eyebrow {
    display: inline-block;
    font-size: 0.72rem;
    font-weight: 800;
    letter-spacing: 1.5px;
    color: var(--copper);
    background: var(--copper-subtle);
    border: 1px solid var(--copper-border);
    padding: 4px 10px;
    border-radius: 4px;
    margin-bottom: 12px;
}
.ft-title {
    font-family: var(--font-heading);
    font-size: 1.85rem;
    line-height: 1.1;
    letter-spacing: 0.5px;
    margin: 0 0 12px;
}
.ft-lede {
    color: var(--silver-text);
    font-size: 1rem;
    line-height: 1.55;
    max-width: 760px;
    margin: 0;
}

/* ---------- Layout ---------- */
.ft-main { padding: 20px 0 110px; }
.ft-container { max-width: 1180px; }
.ft-grid { display: grid; grid-template-columns: minmax(0, 1fr); gap: 16px; }
.ft-col { display: grid; gap: 16px; min-width: 0; }

/* ---------- Legend ---------- */
.ft-legend {
    background: var(--surface-2);
    border: 1px solid var(--steel-border);
    border-radius: 10px;
    padding: 14px 16px;
    margin-bottom: 16px;
}
.ft-legend-title {
    font-family: var(--font-heading);
    font-size: 0.95rem;
    letter-spacing: 0.5px;
    margin: 0 0 10px;
    color: var(--silver-white);
}
.ft-legend-list { list-style: none; margin: 0; padding: 0; display: grid; gap: 8px; }
.ft-legend-list li { color: var(--silver-text); font-size: 0.92rem; line-height: 1.4; }

/* ---------- Badges ---------- */
.ft-badge {
    display: inline-block;
    vertical-align: middle;
    font-family: var(--font-body);
    font-size: 0.64rem;
    font-weight: 800;
    letter-spacing: 0.6px;
    line-height: 1;
    padding: 4px 6px;
    border-radius: 3px;
    border: 1px solid currentColor;
    white-space: nowrap;
    margin-left: 2px;
}
.ft-badge--calc { color: var(--ft-calc); background: var(--ft-calc-bg); }
.ft-badge--user { color: var(--ft-user); background: var(--ft-user-bg); }
.ft-badge--verify { color: var(--ft-verify); background: var(--ft-verify-bg); }
.ft-badge--verify::before { content: "\26A0\FE0E "; }
.ft-badge--estimate { color: var(--ft-estimate); background: var(--ft-estimate-bg); border-style: dashed; }

/* ---------- Cards ---------- */
.ft-card {
    background: var(--surface-3);
    border: 1px solid var(--steel-border);
    border-radius: 10px;
    padding: 18px 16px;
    margin: 0;
    min-width: 0;
}
fieldset.ft-card { padding-top: 6px; }
.ft-card-title {
    font-family: var(--font-heading);
    font-size: 1.05rem;
    color: var(--silver-white);
    margin: 0 0 14px;
    padding: 12px 0 0;
    line-height: 1.3;
}
fieldset.ft-card > legend.ft-card-title { float: left; width: 100%; }
fieldset.ft-card > legend.ft-card-title + * { clear: both; }
.ft-step {
    display: inline-flex; align-items: center; justify-content: center;
    width: 26px; height: 26px;
    border-radius: 50%;
    background: var(--copper);
    color: #fff;
    font-size: 0.85rem;
    margin-right: 6px;
}
.ft-subtitle {
    font-family: var(--font-heading);
    font-size: 0.95rem;
    margin: 18px 0 8px;
    color: var(--silver-white);
}

/* ---------- Fields ---------- */
.ft-field { margin: 0 0 16px; }
.ft-field:last-child { margin-bottom: 0; }
.ft-label {
    display: block;
    color: var(--silver-white);
    font-weight: 600;
    font-size: 0.98rem;
    margin-bottom: 6px;
    line-height: 1.35;
}
.ft-label--small { font-size: 0.85rem; color: var(--silver-text); font-weight: 600; }
.ft-unit { color: var(--silver-muted); font-weight: 500; font-size: 0.85em; }
.ft-input {
    width: 100%;
    min-height: var(--ft-tap);
    padding: 10px 14px;
    background: var(--surface-1);
    border: 2px solid var(--steel-border-bright);
    border-radius: 6px;
    color: #fff;
    font-family: var(--font-body);
    font-size: 1.35rem;          /* >= 16px also prevents iOS zoom */
    font-weight: 600;
    font-variant-numeric: tabular-nums;
    transition: border-color 0.2s;
    -webkit-appearance: none;
    appearance: none;
}
.ft-input--text { font-size: 1.05rem; font-weight: 500; }
.ft-input::placeholder { color: rgba(203, 213, 225, 0.35); }
.ft-input:focus { outline: none; border-color: var(--copper); box-shadow: 0 0 0 3px var(--copper-glow); }
.ft-input[aria-invalid="true"] { border-color: var(--ft-error); }
input[type="time"].ft-input { color-scheme: dark; }
.ft-pair { display: grid; grid-template-columns: 1fr 1fr; gap: 10px; }
.ft-subfield { min-width: 0; }
.ft-help { color: var(--silver-muted); font-size: 0.86rem; line-height: 1.45; margin: 8px 0 0; }
.ft-error-text { color: var(--ft-error); font-size: 0.88rem; font-weight: 600; margin: 6px 0 0; min-height: 0; }
.ft-error-text:empty { display: none; }

/* ---------- Segmented radio controls ---------- */
.ft-segment {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 8px;
    margin-bottom: 14px;
}
.ft-segment--5 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.ft-seg-option { position: relative; display: block; cursor: pointer; }
.ft-seg-option input { position: absolute; opacity: 0; width: 1px; height: 1px; }
.ft-seg-option span {
    display: flex; align-items: center; justify-content: center;
    min-height: var(--ft-tap);
    padding: 8px 10px;
    text-align: center;
    border: 2px solid var(--steel-border-bright);
    border-radius: 6px;
    background: var(--surface-1);
    color: var(--silver-text);
    font-weight: 700;
    font-size: 0.92rem;
    line-height: 1.2;
    transition: all 0.15s;
}
.ft-seg-option input:checked + span { border-color: var(--copper); background: var(--copper-subtle); color: #fff; }
.ft-seg-option input:focus-visible + span { box-shadow: 0 0 0 3px var(--copper-glow); }

/* ---------- Chips ---------- */
.ft-chips { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 8px; }
.ft-chip {
    min-height: 44px;
    min-width: 56px;
    padding: 8px 14px;
    border-radius: 22px;
    border: 1px solid var(--copper-border);
    background: transparent;
    color: var(--silver-white);
    font-family: var(--font-body);
    font-weight: 700;
    font-size: 0.95rem;
    cursor: pointer;
}
.ft-chip:hover, .ft-chip:focus-visible { background: var(--copper-subtle); outline: none; }

.ft-link-btn {
    min-height: 44px;
    margin-top: 6px;
    padding: 6px 0;
    background: none; border: none;
    color: var(--copper-hover);
    font-family: var(--font-body);
    font-weight: 700;
    font-size: 0.92rem;
    text-decoration: underline;
    cursor: pointer;
}

/* ---------- Results ---------- */
.ft-results { border-color: var(--copper-border); background: var(--surface-3-elevated); }
.ft-empty { color: var(--silver-muted); font-size: 0.95rem; padding: 6px 0; }
.ft-empty p { margin: 0; }
.ft-order {
    display: grid;
    gap: 4px;
    padding: 14px;
    border-radius: 8px;
    background: var(--surface-1);
    border: 2px solid var(--copper);
    margin-bottom: 14px;
}
.ft-order-label { font-size: 0.78rem; font-weight: 800; letter-spacing: 1.2px; color: var(--copper-hover); }
.ft-order-value {
    font-family: var(--font-heading);
    font-size: 2.6rem;
    line-height: 1.05;
    color: #fff;
    font-variant-numeric: tabular-nums;
}
.ft-order-unit { font-size: 1.2rem; color: var(--silver-text); }
.ft-order .ft-badge { justify-self: start; margin-left: 0; }
.ft-order-note { margin: 4px 0 0; font-size: 0.82rem; color: var(--silver-muted); }

.ft-rows { margin: 0; }
.ft-row {
    display: flex;
    justify-content: space-between;
    align-items: baseline;
    gap: 10px;
    padding: 9px 0;
    border-bottom: 1px solid var(--steel-divider);
}
.ft-row dt { color: var(--silver-text); font-size: 0.92rem; }
.ft-row dd { margin: 0; color: #fff; font-weight: 700; font-size: 1.02rem; font-variant-numeric: tabular-nums; white-space: nowrap; }
.ft-row--strong dt { color: var(--silver-white); font-weight: 600; }
.ft-row--strong dd { font-size: 1.15rem; }

/* ---------- Timeline ---------- */
.ft-timeline-inputs { display: grid; gap: 4px; margin: 14px 0 6px; }
.ft-timeline-summary {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 10px;
    margin: 12px 0;
}
.ft-timeline-summary > div {
    background: var(--surface-1);
    border: 1px dashed var(--ft-estimate);
    border-radius: 8px;
    padding: 10px 12px;
}
.ft-kicker { display: block; font-size: 0.74rem; font-weight: 700; color: var(--ft-estimate); letter-spacing: 0.4px; margin-bottom: 4px; }
.ft-timeline-summary strong { font-size: 1.2rem; color: #fff; font-variant-numeric: tabular-nums; }
.ft-warning {
    margin: 0 0 10px;
    padding: 10px 12px;
    border-left: 4px solid var(--ft-verify);
    background: var(--ft-verify-bg);
    color: var(--silver-white);
    font-size: 0.9rem;
    line-height: 1.45;
    border-radius: 4px;
}
.ft-table-wrap { margin-top: 6px; }
.ft-table { width: 100%; border-collapse: collapse; font-variant-numeric: tabular-nums; }
.ft-table thead { display: none; }                 /* mobile: stacked rows */
.ft-table tr {
    display: grid;
    grid-template-columns: auto 1fr;
    gap: 2px 12px;
    padding: 10px 0;
    border-bottom: 1px solid var(--steel-divider);
}
.ft-table th, .ft-table td { text-align: left; padding: 0; font-size: 0.92rem; color: var(--silver-white); }
.ft-table th[scope="row"] { grid-row: span 4; color: var(--copper-hover); font-weight: 800; font-size: 1rem; min-width: 34px; }
.ft-table td::before { content: attr(data-label) ": "; color: var(--silver-muted); font-weight: 600; }
.ft-notice { margin: 12px 0 0; font-size: 0.82rem; color: var(--silver-muted); line-height: 1.45; }

/* ---------- Checklist ---------- */
.ft-checklist { list-style: none; margin: 10px 0 0; padding: 0; display: grid; gap: 8px; }
.ft-checklist label {
    display: flex;
    gap: 12px;
    align-items: flex-start;
    min-height: var(--ft-tap);
    padding: 12px;
    border: 1px solid var(--steel-border);
    border-radius: 8px;
    background: var(--surface-1);
    cursor: pointer;
    color: var(--silver-text);
    font-size: 0.93rem;
    line-height: 1.4;
}
.ft-checklist strong { color: var(--silver-white); }
.ft-checklist input { width: 24px; height: 24px; flex: 0 0 24px; margin: 0; accent-color: var(--copper); }

/* ---------- Summary / actions ---------- */
.ft-summary {
    width: 100%;
    min-height: 220px;
    padding: 12px;
    background: var(--surface-1);
    border: 1px solid var(--steel-border-bright);
    border-radius: 6px;
    color: var(--silver-white);
    font-family: Consolas, Menlo, monospace;
    font-size: 0.82rem;
    line-height: 1.45;
    resize: vertical;
}
.ft-actions { display: grid; grid-template-columns: 1fr; gap: 10px; margin-top: 12px; }
.ft-btn {
    min-height: var(--ft-tap);
    padding: 12px 18px;
    border-radius: 6px;
    font-family: var(--font-body);
    font-weight: 800;
    font-size: 1.02rem;
    letter-spacing: 0.4px;
    cursor: pointer;
    border: 2px solid transparent;
}
.ft-btn--primary { background: var(--copper); color: #fff; }
.ft-btn--primary:hover { background: var(--copper-hover); }
.ft-btn--ghost { background: transparent; color: var(--silver-white); border-color: var(--steel-border-bright); }
.ft-btn:focus-visible { outline: none; box-shadow: 0 0 0 3px var(--copper-glow); }
.ft-status { margin: 10px 0 0; color: var(--ft-estimate); font-weight: 600; font-size: 0.92rem; }
.ft-status:empty { display: none; }

.ft-disclaimer { color: var(--silver-muted); font-size: 0.82rem; line-height: 1.5; margin: 22px 0 0; }

/* ---------- Mobile quick bar ---------- */
.ft-quickbar {
    position: fixed;
    left: 0; right: 0; bottom: 0;
    z-index: 20;
    display: none;
    justify-content: space-around;
    gap: 8px;
    padding: 10px 12px calc(10px + env(safe-area-inset-bottom));
    background: rgba(8, 11, 16, 0.96);
    border-top: 2px solid var(--copper);
    color: var(--silver-text);
    font-size: 0.82rem;
}
.ft-quickbar.is-visible { display: flex; }
.ft-quickbar strong { display: block; color: #fff; font-size: 1rem; font-variant-numeric: tabular-nums; }

/* ---------- Breadcrumb (tool pages) ---------- */
.ft-breadcrumb { font-size: 0.9rem; color: var(--silver-muted); margin: 0 0 14px; }
.ft-breadcrumb a {
    display: inline-block;
    padding: 12px 0;              /* comfortable tap height (>= 44px) */
    color: var(--copper-hover);
    font-weight: 700;
    text-decoration: underline;
    text-underline-offset: 3px;
}
.ft-breadcrumb [aria-current="page"] { color: var(--silver-text); }

/* ---------- Field Tools hub (tools/index.html) ---------- */
.ft-hub .ft-container { display: grid; gap: 22px; }
.ft-hub-h2 { font-family: var(--font-heading); font-size: 1.2rem; color: var(--silver-white); margin: 0 0 12px; }
.ft-hub-intro, .ft-hub-cross {
    background: var(--surface-2);
    border: 1px solid var(--steel-border);
    border-radius: 10px;
    padding: 18px 16px;
}
.ft-hub-points { list-style: none; margin: 0; padding: 0; display: grid; gap: 10px; }
.ft-hub-points li { color: var(--silver-text); line-height: 1.5; font-size: 0.97rem; padding-left: 16px; border-left: 3px solid var(--copper); }
.ft-hub-points strong { color: var(--silver-white); }
.ft-hub-cross p { color: var(--silver-text); line-height: 1.55; margin: 0 0 14px; }
.ft-hub-cross strong { color: var(--silver-white); }
.ft-hub-cross-btn { display: inline-flex; align-items: center; justify-content: center; text-decoration: none; }
.ft-hub-legend { margin-bottom: 0; }

.ft-jump { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 16px; }
.ft-jump a {
    display: inline-flex; align-items: center;
    min-height: 44px;
    padding: 8px 14px;
    border-radius: 22px;
    border: 1px solid var(--copper-border);
    color: var(--silver-white);
    font-weight: 700;
    font-size: 0.9rem;
    text-decoration: none;
}
.ft-jump a:hover { background: var(--copper-subtle); }

.ft-cat { scroll-margin-top: 16px; }
.ft-cat-title {
    font-family: var(--font-heading);
    font-size: 1.05rem;
    letter-spacing: 1.2px;
    text-transform: uppercase;
    color: var(--copper-hover);
    margin: 0 0 12px;
    padding-bottom: 8px;
    border-bottom: 1px solid var(--steel-divider);
}
.ft-cat-empty {
    border: 1px dashed var(--steel-border-bright);
    border-radius: 10px;
    padding: 16px;
    color: var(--silver-text);
    line-height: 1.55;
}
.ft-cat-empty p { margin: 0 0 8px; }
.ft-cat-empty p:last-child { margin: 0; }
.ft-cat-empty a { color: var(--copper-hover); font-weight: 700; }

.ft-tool-grid { display: grid; grid-template-columns: minmax(0, 1fr); gap: 12px; }
.ft-tool-card {
    border-radius: 10px;
    padding: 18px 16px;
    min-width: 0;
}
.ft-tool-card--active {
    background: var(--surface-3-elevated);
    border: 2px solid var(--copper);
    box-shadow: 0 10px 28px rgba(0, 0, 0, 0.35);
}
.ft-tool-card--planned {
    background: var(--surface-2);
    border: 1px dashed var(--steel-border-bright);
}
.ft-tool-head { display: grid; gap: 8px; justify-items: start; margin-bottom: 8px; }
.ft-tool-title { font-family: var(--font-heading); font-size: 1.25rem; line-height: 1.25; color: var(--silver-white); margin: 0; }
.ft-tool-card--planned .ft-tool-title { font-size: 1.05rem; color: var(--silver-text); }
.ft-tool-desc { color: var(--silver-text); line-height: 1.5; margin: 0 0 10px; font-size: 0.97rem; }
.ft-tool-note { color: var(--silver-muted); font-size: 0.85rem; font-style: italic; margin: 0; }
.ft-feature-list { margin: 0 0 16px; padding: 0; list-style: none; display: grid; gap: 7px; }
.ft-feature-list li { color: var(--silver-white); font-size: 0.95rem; line-height: 1.4; padding-left: 22px; position: relative; }
.ft-feature-list li::before { content: "\2713"; position: absolute; left: 0; color: var(--copper-hover); font-weight: 800; }
.ft-tool-cta { display: flex; align-items: center; justify-content: center; width: 100%; text-decoration: none; text-transform: uppercase; }

.ft-status {
    display: inline-block;
    font-size: 0.72rem;
    font-weight: 800;
    letter-spacing: 1px;
    line-height: 1;
    padding: 6px 9px;
    border-radius: 4px;
}
.ft-status--active { background: #e8955f; color: #0a0e17; }
.ft-status--planned { background: transparent; color: var(--silver-text); border: 1px solid var(--silver-muted); }

/* Visible keyboard focus for Field Tools links/buttons */
.ft-page a:focus-visible, .ft-page button:focus-visible {
    outline: 3px solid var(--ft-estimate);
    outline-offset: 3px;
}

/* ---------- Tablet / desktop ---------- */
@media (min-width: 600px) {
    .ft-title { font-size: 2.4rem; }
    .ft-legend-list { grid-template-columns: 1fr 1fr; }
    .ft-segment--5 { grid-template-columns: repeat(5, minmax(0, 1fr)); }
    .ft-timeline-inputs { grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 14px; }
    .ft-actions { grid-template-columns: 1fr 1fr; }
    .ft-card { padding: 20px 22px; }
    .ft-tool-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
    .ft-hub-intro, .ft-hub-cross, .ft-tool-card { padding: 22px 24px; }
    .ft-tool-cta { width: auto; display: inline-flex; padding-left: 28px; padding-right: 28px; }
    .ft-feature-list { grid-template-columns: 1fr 1fr; column-gap: 24px; }
}

@media (min-width: 768px) {
    .ft-table thead { display: table-header-group; }
    .ft-table tr { display: table-row; }
    .ft-table th, .ft-table td { display: table-cell; padding: 10px 8px; border-bottom: 1px solid var(--steel-divider); }
    .ft-table thead th { color: var(--silver-muted); font-size: 0.78rem; letter-spacing: 0.6px; text-transform: uppercase; font-weight: 700; }
    .ft-table td::before { content: none; }
}

@media (min-width: 992px) {
    .ft-hero { padding: 150px 0 40px; }
    .ft-title { font-size: 3rem; }
    .ft-main { padding-bottom: 60px; }
    .ft-grid { grid-template-columns: minmax(0, 1.15fr) minmax(0, 1fr); align-items: start; gap: 22px; }
    .ft-span { grid-column: 1 / -1; }
    .ft-col--results { position: sticky; top: 20px; }
    .ft-quickbar, .ft-quickbar.is-visible { display: none; }
}