/* ============================================================
   SignalForgeRF marketing site — design system
   Palette and structure derive from the product itself: the dark
   console UI and the dBm coverage ramp (blue→green→yellow→orange).
   Display: Chakra Petch · Body: Inter · Telemetry: IBM Plex Mono
   ============================================================ */

:root {
    --ink: #17171B;
    --ink-2: #1C1C21;
    --panel: #1F1F25;
    --line: #2E2E36;
    --signal: #2D7DD2;
    --signal-soft: #2d7dd226;
    --strong: #2E86DE;
    --good: #35B778;
    --marginal: #E8C547;
    --fringe: #E2704F;
    --text: #EFEFF2;
    --muted: #9CA0AB;
    --faint: #6C7079;
    --radius: 6px;
    --w: 1140px;
    --display: 'Chakra Petch', sans-serif;
    --body: 'Inter', system-ui, sans-serif;
    --mono: 'IBM Plex Mono', ui-monospace, monospace;
}

* { box-sizing: border-box; margin: 0; padding: 0; }

html { scroll-behavior: smooth; scroll-padding-top: 76px; }

body {
    background: var(--ink);
    color: var(--text);
    font-family: var(--body);
    font-size: 16px;
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
}

img, svg { max-width: 100%; display: block; }

/* Grid children must be allowed to shrink below intrinsic width */
.hero-grid > *, .feature > *, .pilot-grid > *, .prob, .cap, .val { min-width: 0; }

a { color: var(--signal); text-decoration: none; }
a:hover { text-decoration: underline; }

:focus-visible {
    outline: 2px solid var(--signal);
    outline-offset: 2px;
    border-radius: 2px;
}

::selection { background: var(--signal); color: #fff; }

.wrap { max-width: var(--w); margin: 0 auto; padding: 0 24px; }

/* ---------- boot splash ---------- */
.boot {
    min-height: 100vh; display: flex; flex-direction: column;
    align-items: center; justify-content: center; gap: 10px;
}
.boot-mark { font-family: var(--display); font-size: 28px; font-weight: 700; letter-spacing: .02em; }
.boot-mark span { color: var(--signal); }
.boot-note { font-family: var(--mono); font-size: 11px; color: var(--faint); letter-spacing: .35em; animation: bootpulse 1.2s ease-in-out infinite; }
@keyframes bootpulse { 50% { opacity: .3; } }

#blazor-error-ui {
    display: none; position: fixed; bottom: 0; left: 0; right: 0; z-index: 100;
    background: #3a1f1f; color: var(--text); padding: 10px 24px;
    font-size: 14px; border-top: 1px solid var(--fringe);
}
#blazor-error-ui .reload { margin-left: 12px; }
#blazor-error-ui .dismiss { float: right; cursor: pointer; color: var(--muted); }

/* ---------- nav ---------- */
.nav {
    position: sticky; top: 0; z-index: 50;
    background: #17171bd9; backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--line);
}
.nav-inner {
    max-width: var(--w); margin: 0 auto; padding: 0 24px;
    height: 60px; display: flex; align-items: center; gap: 28px;
}
.brand {
    font-family: var(--display); font-weight: 700; font-size: 19px;
    color: var(--text); letter-spacing: .02em; margin-right: auto;
}
.brand span { color: var(--signal); }
.brand:hover { text-decoration: none; }
.nav-links { display: flex; gap: 22px; align-items: center; }
.nav-links a { color: var(--muted); font-size: 13.5px; font-weight: 500; }
.nav-links a:hover { color: var(--text); text-decoration: none; }

.btn {
    display: inline-block; font-family: var(--display); font-weight: 600;
    font-size: 14.5px; letter-spacing: .03em; padding: 10px 20px;
    border-radius: var(--radius); border: 1px solid transparent;
    cursor: pointer; transition: background .15s, border-color .15s, color .15s;
}
.btn-primary { background: var(--signal); color: #fff; }
.btn-primary:hover { background: #3b8de0; text-decoration: none; }
.btn-ghost { border-color: var(--line); color: var(--text); background: transparent; }
.btn-ghost:hover { border-color: var(--signal); text-decoration: none; }
.btn-sm { padding: 7px 14px; font-size: 13px; }

/* ---------- telemetry eyebrow ---------- */
.eyebrow {
    font-family: var(--mono); font-size: 11.5px; font-weight: 500;
    letter-spacing: .28em; color: var(--muted); text-transform: uppercase;
    display: flex; align-items: center; gap: 10px; margin-bottom: 14px;
}
.eyebrow::before {
    content: ""; width: 22px; height: 3px; border-radius: 2px;
    background: var(--tick, var(--signal));
}

/* ---------- hero ---------- */
.hero { border-bottom: 1px solid var(--line); overflow: hidden; }
.hero-grid {
    max-width: var(--w); margin: 0 auto; padding: 84px 24px 72px;
    display: grid; grid-template-columns: minmax(0, 1.05fr) minmax(0, .95fr);
    gap: 56px; align-items: center;
}
.hero h1 {
    font-family: var(--display); font-weight: 700;
    font-size: clamp(38px, 5vw, 56px); line-height: 1.06; letter-spacing: .005em;
    margin: 0 0 20px;
}
.hero h1 em { font-style: normal; color: var(--signal); }
.hero-sub { color: var(--muted); font-size: 17.5px; max-width: 34em; margin-bottom: 30px; }
.hero-sub strong { color: var(--text); font-weight: 600; }
.hero-ctas { display: flex; gap: 14px; flex-wrap: wrap; margin-bottom: 34px; }
.hero-readout {
    font-family: var(--mono); font-size: 12.5px; color: var(--faint);
    display: flex; gap: 18px; flex-wrap: wrap;
}
.hero-readout b { color: var(--muted); font-weight: 500; }

.hero-stage { position: relative; }
.hero-svg { width: 100%; height: auto; display: block; }

/* Load-in sequence */
.rise { opacity: 0; transform: translateY(14px); animation: rise .7s cubic-bezier(.2,.7,.2,1) forwards; }
.rise.d1 { animation-delay: .08s; } .rise.d2 { animation-delay: .18s; }
.rise.d3 { animation-delay: .28s; } .rise.d4 { animation-delay: .4s; }
@keyframes rise { to { opacity: 1; transform: none; } }

/* Propagation rings in the hero SVG */
.ring { transform-origin: center; transform-box: fill-box; opacity: 0; }
.ring-a { animation: propagate 5s ease-out .6s infinite; }
.ring-b { animation: propagate 5s ease-out 2.2s infinite; }
.ring-c { animation: propagate 5s ease-out 3.6s infinite; }
@keyframes propagate {
    0%   { transform: scale(.06); opacity: .9; }
    70%  { opacity: .25; }
    100% { transform: scale(1); opacity: 0; }
}
.site-pulse { transform-origin: center; transform-box: fill-box; animation: sitepulse 2.4s ease-in-out infinite; }
@keyframes sitepulse { 50% { opacity: .55; } }

/* ---------- sections ---------- */
section { padding: 84px 0; }
section + section { border-top: 1px solid var(--line); }
.section-head { max-width: 640px; margin-bottom: 44px; }
.section-head h2 {
    font-family: var(--display); font-weight: 600;
    font-size: clamp(26px, 3.2vw, 34px); line-height: 1.15; margin-bottom: 12px;
}
.section-head p { color: var(--muted); font-size: 16px; }

/* dBm ramp divider — the product's legend as a structural element */
.ramp { display: flex; height: 4px; border-radius: 2px; overflow: hidden; margin: 0 0 44px; max-width: 240px; }
.ramp i { flex: 1; }
.ramp i:nth-child(1) { background: var(--strong); }
.ramp i:nth-child(2) { background: var(--good); }
.ramp i:nth-child(3) { background: var(--marginal); }
.ramp i:nth-child(4) { background: var(--fringe); }

/* ---------- problem strip ---------- */
.prob-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; }
.prob {
    background: var(--ink-2); border: 1px solid var(--line);
    border-radius: var(--radius); padding: 26px 24px;
}
.prob .stat {
    font-family: var(--mono); font-size: 26px; font-weight: 500;
    color: var(--fringe); margin-bottom: 10px; letter-spacing: -.01em;
}
.prob h3 { font-size: 16px; font-weight: 600; margin-bottom: 8px; }
.prob p { color: var(--muted); font-size: 14px; }
.prob-src { font-family: var(--mono); font-size: 11px; color: var(--faint); margin-top: 18px; }

/* ---------- capability grid ---------- */
.cap-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; }
.cap {
    background: var(--panel); border: 1px solid var(--line);
    border-radius: var(--radius); padding: 26px 24px;
    display: flex; flex-direction: column; gap: 10px;
    transition: border-color .2s;
}
.cap:hover { border-color: #3d3d48; }
.cap .eyebrow { margin-bottom: 2px; }
.cap h3 { font-family: var(--display); font-size: 18px; font-weight: 600; line-height: 1.3; }
.cap > p { color: var(--muted); font-size: 14px; }
.cap ul { list-style: none; margin-top: 4px; display: grid; gap: 7px; }
.cap li { font-size: 13.5px; color: var(--muted); padding-left: 18px; position: relative; }
.cap li::before {
    content: ""; position: absolute; left: 0; top: 8px;
    width: 7px; height: 3px; border-radius: 2px; background: var(--signal);
}
.cap-loading { font-family: var(--mono); font-size: 13px; color: var(--faint); letter-spacing: .2em; }

/* ---------- feature rows ---------- */
.feature {
    display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1.15fr);
    gap: 56px; align-items: center;
}
.feature.flip { grid-template-columns: minmax(0, 1.15fr) minmax(0, 1fr); }
.feature.flip .feature-copy { order: 2; }
.feature.flip .feature-media { order: 1; }
.feature h2 {
    font-family: var(--display); font-weight: 600;
    font-size: clamp(24px, 3vw, 30px); line-height: 1.18; margin-bottom: 14px;
}
.feature > div > p { color: var(--muted); font-size: 15.5px; margin-bottom: 18px; }
.feature > div > p strong { color: var(--text); font-weight: 600; }

.spec-list { list-style: none; display: grid; gap: 12px; }
.spec-list li { display: grid; grid-template-columns: 92px 1fr; gap: 14px; font-size: 14px; align-items: baseline; }
.spec-list .k { font-family: var(--mono); font-size: 12px; color: var(--signal); letter-spacing: .06em; white-space: nowrap; }
.spec-list .v { color: var(--muted); }
.spec-list .v b { color: var(--text); font-weight: 600; }

/* Console frame around real screenshots */
.console { background: var(--panel); border: 1px solid var(--line); border-radius: 8px; overflow: hidden; }
.console-bar {
    display: flex; align-items: center; gap: 8px;
    padding: 8px 12px; border-bottom: 1px solid var(--line);
    font-family: var(--mono); font-size: 11px; color: var(--faint); letter-spacing: .1em;
}
.console-bar::before {
    content: ""; width: 8px; height: 8px; border-radius: 50%;
    background: var(--good); flex: none;
}
.console img { width: 100%; }
.console-cap { padding: 10px 14px; font-size: 12.5px; color: var(--faint); border-top: 1px solid var(--line); }

/* ---------- validation ---------- */
.val-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 18px; }
.val {
    border: 1px solid var(--line); border-left: 3px solid var(--good);
    border-radius: var(--radius); padding: 20px 22px; background: var(--ink-2);
}
.val .num { font-family: var(--mono); font-size: 22px; color: var(--good); margin-bottom: 6px; }
.val h3 { font-size: 15px; font-weight: 600; margin-bottom: 6px; }
.val p { font-size: 13.5px; color: var(--muted); }

/* ---------- comparison ---------- */
.compare-scroll { overflow-x: auto; border: 1px solid var(--line); border-radius: var(--radius); }
table.compare { border-collapse: collapse; width: 100%; min-width: 760px; font-size: 14px; }
.compare th, .compare td { padding: 13px 16px; text-align: left; border-bottom: 1px solid var(--line); }
.compare thead th { font-family: var(--display); font-size: 14px; background: var(--ink-2); }
.compare thead th.us { background: var(--signal); color: #fff; }
.compare tbody th { font-weight: 600; color: var(--text); font-size: 13.5px; }
.compare td { color: var(--muted); }
.compare td.us { background: #1f3348; color: #cfe6ff; }
.compare tbody tr:last-child th, .compare tbody tr:last-child td { border-bottom: none; }
.compare-note { font-size: 12px; color: var(--faint); margin-top: 12px; }

/* ---------- pilot / contact ---------- */
.pilot-grid { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1fr); gap: 56px; }
.pilot-points { list-style: none; display: grid; gap: 14px; margin-top: 22px; }
.pilot-points li { display: flex; gap: 12px; font-size: 15px; color: var(--muted); }
.pilot-points li::before { content: "→"; color: var(--signal); font-weight: 600; }
.pilot-points b { color: var(--text); }

.form { display: grid; gap: 14px; }
.form label { display: grid; gap: 6px; font-size: 13px; font-weight: 500; color: var(--muted); }
.form input, .form textarea {
    background: var(--ink-2); border: 1px solid var(--line); border-radius: var(--radius);
    color: var(--text); font-family: var(--body); font-size: 15px; padding: 11px 13px;
    transition: border-color .15s;
}
.form input:focus, .form textarea:focus { border-color: var(--signal); outline: none; }
.form textarea { min-height: 110px; resize: vertical; }
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; }
.form-note { font-size: 12.5px; color: var(--faint); }
.form-result { font-size: 14px; padding: 12px 14px; border-radius: var(--radius); }
.form-result.ok { background: #1e3226; color: #9fe0b5; border: 1px solid #2c5b3c; }
.form-result.err { background: #392222; color: #efb5a6; border: 1px solid #6b3a2e; }

/* ---------- footer ---------- */
footer { border-top: 1px solid var(--line); padding: 34px 0 44px; }
.foot {
    display: flex; justify-content: space-between; gap: 20px; flex-wrap: wrap;
    color: var(--faint); font-size: 13px;
}
.foot .brand { font-size: 16px; margin-right: 0; }
.foot-meta { font-family: var(--mono); font-size: 11.5px; line-height: 1.9; text-align: right; }

/* ---------- reveal on scroll ---------- */
[data-reveal] { opacity: 0; transform: translateY(10px); transition: opacity .6s ease, transform .6s cubic-bezier(.2,.7,.2,1); }
[data-reveal].on { opacity: 1; transform: none; }

/* ---------- responsive ---------- */
@media (max-width: 1000px) {
    .hero-grid { grid-template-columns: minmax(0, 1fr); padding-top: 56px; gap: 40px; }
    .prob-grid, .cap-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
    .feature, .feature.flip { grid-template-columns: minmax(0, 1fr); gap: 28px; }
    .feature.flip .feature-copy { order: 1; }
    .feature.flip .feature-media { order: 2; }
    .val-grid, .pilot-grid { grid-template-columns: minmax(0, 1fr); }
    .nav-links a:not(.btn) { display: none; }
}
@media (max-width: 640px) {
    section { padding: 60px 0; }
    .prob-grid, .cap-grid, .form-row { grid-template-columns: minmax(0, 1fr); }
    .spec-list li { grid-template-columns: 78px 1fr; }
    .foot { flex-direction: column; }
    .foot-meta { text-align: left; }
}

/* ---------- reduced motion ---------- */
@media (prefers-reduced-motion: reduce) {
    html { scroll-behavior: auto; }
    .rise, .ring, .site-pulse, .boot-note { animation: none !important; }
    .rise { opacity: 1; transform: none; }
    .ring { opacity: 0; }
    [data-reveal] { opacity: 1; transform: none; transition: none; }
}