/* Free tools (/tools/): the app's own design system, not a second one.
   Tokens are copied from vinscanner.css (dark default, `.light` override) so
   these pages read as Auto Part Pulse. theme.js adds `.light` to <html> when
   the visitor chose light in the app (localStorage "theme"). */
:root {
    --bg-page:         #0b0e14;
    --bg-topbar:       #10151e;
    --bg-card:         #141b26;
    --bg-card-hover:   #1b2432;
    --bg-chip:         #1b2432;
    --border:          #28303f;
    --text-primary:    #eef2f8;
    --text-secondary:  #9aa6ba;
    --text-muted:      #828ea0;
    --accent:          #2a62ee;
    --accent-ink:      #ffffff;
    --accent-text:     #6b96ff;
    --cyan-text:       #3fdfe0;
    --green:           #2fd07d;
    --green-text:      #34d17e;
    --green-bg:        rgba(47, 208, 125, 0.12);
    --green-border:    rgba(47, 208, 125, 0.38);
    --danger:          #ff5e5e;
    --warning-bg:      rgba(246, 166, 35, 0.12);
    --warning-border:  rgba(246, 166, 35, 0.40);
    --warning-text:    #f6a623;
    --accent-shadow:   0 6px 16px -4px rgba(47, 107, 255, 0.55);
    --card-shadow:     0 18px 42px -22px rgba(0, 0, 0, 0.7);
    --font-ui:   system-ui, -apple-system, 'Segoe UI Variable', 'Segoe UI', Roboto, Arial, sans-serif;
    --font-mono: ui-monospace, 'Cascadia Code', 'SF Mono', 'Segoe UI Mono', Menlo, Consolas, monospace;
    color-scheme: dark;
}

:root.light {
    --bg-page:         #eaedf2;
    --bg-topbar:       #ffffff;
    --bg-card:         #ffffff;
    --bg-card-hover:   #f7f9fc;
    --bg-chip:         #f2f4f8;
    --border:          #d7dce4;
    --text-primary:    #141a24;
    --text-secondary:  #5b6577;
    --text-muted:      #5e6675;
    --accent-text:     #2456d8;
    --cyan-text:       #077780;
    --green:           #087a41;
    --green-text:      #087a41;
    --green-bg:        #eefaf2;
    --green-border:    #bce8cf;
    --danger:          #dc2626;
    --warning-bg:      #fff8ec;
    --warning-border:  #f0d9a8;
    --warning-text:    #8a5a00;
    --accent-shadow:   0 6px 16px -6px rgba(47, 107, 255, 0.40);
    --card-shadow:     0 20px 48px -28px rgba(15, 25, 55, 0.30);
    color-scheme: light;
}

* { box-sizing: border-box; }

body {
    margin: 0;
    font: 15px/1.6 var(--font-ui);
    color: var(--text-primary);
    background-color: var(--bg-page);
    /* the app's faint instrument grid */
    background-image: linear-gradient(
        color-mix(in srgb, var(--text-secondary) 6%, transparent) 1px, transparent 1px);
    background-size: 100% 44px;
    -webkit-font-smoothing: antialiased;
}

a { color: var(--accent-text); }
[hidden] { display: none !important; }
:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }

/* ===== TOPBAR (as the app's) ===== */
header {
    position: sticky; top: 0; z-index: 10;
    height: 54px;
    display: flex; align-items: center; justify-content: space-between; gap: 12px;
    padding: 0 max(16px, calc((100vw - 1100px) / 2));
    background: var(--bg-topbar);
    border-bottom: 1px solid var(--border);
}
.brand {
    display: inline-flex; align-items: center; gap: 9px;
    font-size: 16px; font-weight: 750; letter-spacing: -0.01em;
    color: var(--text-primary); text-decoration: none; white-space: nowrap;
}
.brand b { color: var(--cyan-text); font-weight: inherit; }
.brand-logo {
    width: 26px; height: 26px; border-radius: 8px; flex-shrink: 0;
    box-shadow: 0 0 0 1px rgba(255, 255, 255, 0.08), 0 4px 12px rgba(47, 107, 255, 0.35);
}
header nav { display: flex; align-items: center; gap: 8px; font-size: 13px; font-weight: 600; }
header nav a { color: var(--text-secondary); text-decoration: none; padding: 7px 10px; border-radius: 10px; }
header nav a:hover { color: var(--text-primary); background: var(--bg-chip); }
header nav .nav-account {
    color: var(--accent-ink); background: var(--accent); box-shadow: var(--accent-shadow);
}
header nav .nav-account:hover { color: var(--accent-ink); background: var(--accent); opacity: 0.9; }

/* ===== PAGE ===== */
main { max-width: 1100px; margin: 0 auto; padding: 20px 16px 64px; }

.breadcrumb { display: flex; gap: 8px; font-size: 12px; color: var(--text-muted); }
.breadcrumb a { color: var(--text-secondary); text-decoration: none; }
.breadcrumb a:hover { color: var(--text-primary); }

.intro { padding: 28px 0 26px; max-width: 760px; }
.eyebrow, .panel-heading h2 {
    margin: 0 0 10px;
    font-size: 10.5px; font-weight: 700; letter-spacing: 0.14em;
    text-transform: uppercase; color: var(--text-muted);
}
h1 {
    margin: 0 0 12px;
    font-size: clamp(28px, 4vw, 40px); line-height: 1.12;
    font-weight: 800; letter-spacing: -0.03em;
}
h2 { line-height: 1.25; letter-spacing: -0.015em; }
.lead { margin: 0 0 14px; font-size: 17px; color: var(--text-secondary); }
.free-label {
    display: inline-flex; align-items: center; gap: 7px; margin: 0;
    padding: 4px 11px; border-radius: 20px;
    font-size: 12px; font-weight: 600;
    color: var(--green-text); background: var(--green-bg); border: 1px solid var(--green-border);
}
.free-label span { font-weight: 800; }

/* ===== WORKSPACE ===== */
.workspace {
    display: grid; grid-template-columns: minmax(0, 1fr) 320px; gap: 16px; align-items: start;
}
.tool-panel, .pitch, .tool-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 18px;
    box-shadow: var(--card-shadow);
}
.tool-panel { overflow: hidden; }
form { padding: 20px; }
.panel-heading { margin-bottom: 14px; }
.panel-heading h2 { margin: 0; }

.fields { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; }
label { display: grid; gap: 6px; font-size: 12px; font-weight: 600; color: var(--text-secondary); }
input, select {
    width: 100%; min-height: 44px; min-width: 0;
    padding: 10px 12px;
    font: 600 14px var(--font-ui);
    color: var(--text-primary);
    background: var(--bg-chip);
    border: 1px solid var(--border);
    border-radius: 10px;
}
input[type=number] { font-family: var(--font-mono); font-variant-numeric: tabular-nums; }
select:disabled { opacity: 0.5; }
input:focus, select:focus { border-color: var(--accent); outline: none; }

.form-note { margin: 14px 0; font-size: 12px; line-height: 1.6; color: var(--text-muted); }
.checkbox {
    display: flex; align-items: center; gap: 10px; margin-top: 14px;
    font-size: 13px; font-weight: 500; color: var(--text-secondary);
}
.checkbox input { width: 18px; height: 18px; min-height: 0; accent-color: var(--accent); }

/* cobalt = the one action */
.primary {
    display: inline-flex; align-items: center; justify-content: center; gap: 8px;
    width: 100%; padding: 13px 18px;
    font: 700 14px var(--font-ui);
    color: var(--accent-ink); background: var(--accent);
    border: 0; border-radius: 12px; box-shadow: var(--accent-shadow);
    text-decoration: none; cursor: pointer;
    transition: opacity 0.15s, transform 0.05s;
}
.primary:hover { opacity: 0.9; }
.primary:active { transform: translateY(1px); }
.primary:disabled { opacity: 0.55; cursor: wait; }

#status { min-height: 1em; margin: 10px 0 0; font-size: 12px; color: var(--text-muted); }
#status.error { color: var(--danger); }

/* ===== RESULT ===== */
.result { padding: 20px; border-top: 1px solid var(--border); background: var(--bg-card-hover); }
.result h2 { margin: 0 0 4px; font-size: 17px; }
.result .result-context { margin: 0; font-size: 13px; color: var(--text-secondary); }
/* green = money only, as in the app */
.result .amount {
    margin: 10px 0 2px;
    font: 800 44px/1.15 var(--font-mono); font-variant-numeric: tabular-nums;
    letter-spacing: -0.03em; color: var(--green);
}
.result .amount.loss { color: var(--danger); }
.result dl { display: grid; grid-template-columns: 1fr 1fr; gap: 8px; margin: 16px 0; }
.result dl div {
    padding: 10px 12px; border-radius: 12px;
    background: var(--bg-card); border: 1px solid var(--border);
}
.result dt { font-size: 11px; color: var(--text-muted); }
.result dd {
    margin: 2px 0 0;
    font: 700 16px var(--font-mono); font-variant-numeric: tabular-nums;
}
.result p { font-size: 13px; color: var(--text-secondary); }
.result ul { margin: 12px 0; padding: 0; list-style: none; display: flex; flex-wrap: wrap; gap: 6px; }
.result li {
    padding: 4px 11px; border-radius: 20px; font-size: 13px;
    background: var(--bg-chip); border: 1px solid var(--border); color: var(--text-secondary);
}
.result li strong { color: var(--text-primary); font-family: var(--font-mono); }
.result a { font-size: 13px; font-weight: 700; text-decoration: none; }
.result .caution {
    padding: 10px 12px; border-radius: 12px;
    color: var(--warning-text); background: var(--warning-bg); border: 1px solid var(--warning-border);
}

.result .pro-note {
    padding: 10px 12px; border-radius: 12px;
    background: color-mix(in srgb, var(--accent) 12%, transparent);
    border: 1px solid color-mix(in srgb, var(--accent) 40%, transparent);
}
.result .pro-note strong { color: var(--accent-text); }

/* ===== PRO PITCH ===== */
.pitch {
    position: sticky; top: 70px; padding: 20px;
    background:
        radial-gradient(120% 70% at 100% 0%, rgba(42, 98, 238, 0.18), transparent 60%),
        var(--bg-card);
}
.pitch .eyebrow { color: var(--accent-text); }
.pitch h2 { margin: 0 0 8px; font-size: 21px; }
.pitch p { margin: 0; font-size: 13px; color: var(--text-secondary); }
.pitch ul { margin: 14px 0 16px; padding: 0; list-style: none; font-size: 13px; }
.pitch li { padding: 5px 0; color: var(--text-primary); }
.pitch li::before { content: '✓'; margin-right: 9px; font-weight: 800; color: var(--green-text); }
.pitch .pitch-cta {
    display: flex; align-items: center; justify-content: center; gap: 8px;
    padding: 12px; border-radius: 12px;
    font-size: 14px; font-weight: 700; text-decoration: none;
    color: var(--accent-ink); background: var(--accent); box-shadow: var(--accent-shadow);
}
.pitch .pitch-cta:hover { opacity: 0.9; }
.pitch .pitch-note { margin: 10px 0 8px; font-size: 11px; color: var(--text-muted); text-align: center; }
.quiet-link { display: block; text-align: center; font-size: 12px; font-weight: 600; text-decoration: none; }

/* ===== EXPLAINER + RELATED ===== */
.explanation { max-width: 720px; margin-top: 44px; }
.explanation h2 { margin: 0 0 10px; font-size: 22px; }
.explanation h3 { margin: 22px 0 6px; font-size: 15px; }
.explanation p { margin: 0 0 10px; font-size: 14px; color: var(--text-secondary); }
.explanation .source-note { font-size: 12px; color: var(--text-muted); }

.related { margin-top: 40px; padding-top: 20px; border-top: 1px solid var(--border); }
.related h2 { margin: 0 0 12px; font-size: 10.5px; font-weight: 700; letter-spacing: 0.14em; text-transform: uppercase; color: var(--text-muted); }
.related > div { display: flex; flex-wrap: wrap; gap: 8px; }
.related a {
    display: inline-flex; gap: 10px; padding: 8px 14px; border-radius: 20px;
    font-size: 13px; font-weight: 600; text-decoration: none;
    color: var(--text-primary); background: var(--bg-chip); border: 1px solid var(--border);
}
.related a:hover { border-color: var(--accent); }
.related a span { color: var(--accent-text); }

/* ===== HUB (/tools/) ===== */
.tool-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; }
.tool-card {
    display: flex; flex-direction: column; padding: 20px;
    color: var(--text-primary); text-decoration: none;
    transition: border-color 0.15s, background-color 0.15s;
}
.tool-card:hover { border-color: var(--accent); background: var(--bg-card-hover); }
.card-number {
    font-size: 10.5px; font-weight: 700; letter-spacing: 0.14em;
    text-transform: uppercase; color: var(--text-muted);
}
.tool-card h2 { margin: 10px 0 8px; font-size: 19px; }
.tool-card p { margin: 0 0 20px; font-size: 13px; color: var(--text-secondary); }
.card-action { margin-top: auto; font-size: 13px; font-weight: 700; color: var(--accent-text); }
.hub-cta { width: auto; margin-top: 8px; }

/* ===== FOOTER ===== */
footer {
    max-width: 1100px; margin: 0 auto; padding: 20px 16px 32px;
    display: flex; flex-wrap: wrap; align-items: center; gap: 8px 20px;
    border-top: 1px solid var(--border);
    font-size: 12px; color: var(--text-muted);
}
footer .brand { font-size: 13px; }
footer p { margin: 0; }
footer nav { display: flex; gap: 16px; margin-left: auto; }
footer nav a { color: var(--text-muted); text-decoration: none; }
footer nav a:hover { color: var(--text-primary); }

@media (max-width: 860px) {
    .workspace { grid-template-columns: minmax(0, 1fr); }
    .pitch { position: static; }
    .tool-grid { grid-template-columns: 1fr; }
}
@media (max-width: 560px) {
    header nav a:not(.nav-account) { display: none; }
    .fields, .result dl { grid-template-columns: 1fr; }
    .intro { padding-top: 18px; }
    .result .amount { font-size: 38px; }
    footer nav { margin-left: 0; }
}