/* GridStrat / Signal Field — scoped to the homepage hero. */
.signal-hero {
  --signal-bg: #050e1a;
  position: relative;
  isolation: isolate;
  overflow: hidden;
  color: #fff;
  background: radial-gradient(ellipse at 81% 43%, #09363d 0, #071a2a 29%, #050e1a 64%);
}
.signal-hero::after {
  content: "";
  position: absolute;
  z-index: -1;
  inset: 0;
  pointer-events: none;
  background: linear-gradient(90deg, #050e1a 0%, rgba(5,14,26,.98) 21%, rgba(5,14,26,.72) 40%, transparent 66%);
}
.signal-canvas { position: absolute; inset: 0; width: 100%; height: 100%; z-index: 0; pointer-events: none; }
.signal-hero .wrap { position: relative; }
.signal-stage { min-height: 640px; display: grid; grid-template-columns: minmax(0, .92fr) minmax(0, 1.18fr); gap: 30px; align-items: center; position: relative; padding: 32px 0 35px; }
.signal-copy { width: 100%; min-width: 0; position: relative; z-index: 2; }
.signal-eyebrow { display: flex; align-items: center; gap: 13px; margin: 0 0 26px; font: 500 .8125rem/1.5 var(--font-mono); letter-spacing: .07em; color: #9ce9ee; text-transform: uppercase; }
.signal-eyebrow::before { content: ""; width: 25px; height: 1px; background: #61d5e6; }
.signal-title { font-size: clamp(2.6rem, 4vw, 3.5rem); line-height: 1.065; letter-spacing: -.048em; font-weight: 600; margin: 0 0 23px; color: #f7fbff; }
.signal-title .signal-emphasis { display: block; color: #88f3ea; }
.signal-title .signal-subline { display: block; margin-top: 19px; font-size: 1.125rem; font-weight: 500; letter-spacing: -.01em; line-height: 1.55; color: #e2ecf5; }
.signal-description { max-width: 575px; margin: 0 0 28px; font-size: 1rem; line-height: 1.75; color: #a9bbce; }
.signal-actions { display: flex; align-items: center; gap: 18px 23px; flex-wrap: wrap; }
.signal-actions .btn { background: #84eee3; color: #071a25; font-size: .9375rem; padding: 15px 21px; border-radius: 7px; box-shadow: 0 3px 28px #51ead214; }
.signal-actions .btn:hover { background: #b8fff2; box-shadow: 0 3px 35px #51ead233; }
.signal-secondary { color: #d5e5ed; font-size: .9375rem; text-decoration: none; padding: 10px 0; border-bottom: 1px solid #7696a74d; }
.signal-secondary:hover { color: #8ef5e6; border-color: #8ef5e6; }
.signal-explorer { --stage-color: #91f0df; min-width: 0; position: relative; z-index: 1; }
.signal-explorer h2 { color: #e3f2f7; font-size: 1.125rem; font-weight: 500; line-height: 1.5; letter-spacing: -.015em; margin: 0 0 16px; }
.signal-steps { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 4px; }
.signal-step { display: flex; gap: 5px; flex-direction: column; align-items: flex-start; padding: 9px 8px; min-height: 61px; border: 0; border-bottom: 2px solid #345360; border-radius: 4px 4px 0 0; background: #07172480; color: #afc7d6; font: 500 .875rem/1.4 var(--font-body); text-align: left; cursor: pointer; transition: background .2s, color .2s, border-color .2s; }
.signal-step-number { font: .75rem/1 var(--font-mono); color: #9ebac9; }
.signal-step[aria-pressed="true"] { color: #eefcff; background: #173b4359; border-color: var(--stage-color); }
.signal-step[aria-pressed="true"] .signal-step-number { color: var(--stage-color); }
.signal-step:hover { background: #1e424b80; color: #fff; }
.signal-visual { height: 440px; position: relative; isolation: isolate; cursor: crosshair; }
.signal-visual-label { position: absolute; z-index: 1; left: 0; right: 0; bottom: 8px; text-align: center; color: #a8c8d5; font: .8125rem/1.5 var(--font-mono); pointer-events: none; }
.signal-explorer[data-detail-open="true"] .signal-visual-label { visibility: hidden; }
.signal-detail { position: absolute; z-index: 3; bottom: 18px; left: 50%; transform: translateX(-50%); width: min(390px, 94%); max-height: calc(100% - 36px); overflow-y: auto; padding: 20px 22px; border: 1px solid #49727b; border-top: 2px solid var(--stage-color); border-radius: 12px; background: linear-gradient(135deg, rgba(8,29,43,.96), rgba(5,17,29,.91)); box-shadow: 0 14px 45px #01071166; backdrop-filter: blur(16px); -webkit-backdrop-filter: blur(16px); cursor: auto; animation: signal-detail-in .18s ease-out; }
.signal-detail[hidden] { display: none; }
.signal-explorer[data-active-stage="0"] .signal-detail { left: 0; transform: none; }
.signal-explorer[data-active-stage="2"] .signal-detail { left: auto; right: 0; transform: none; }
.signal-detail-close { position: absolute; top: 4px; right: 4px; width: 36px; height: 36px; border: 0; border-radius: 6px; color: #bdced9; background: transparent; font: 1.4rem/1 var(--font-body); cursor: pointer; }
.signal-detail-close:hover { background: #ffffff12; color: #fff; }
.signal-detail-kicker { color: var(--stage-color); font: .75rem/1.5 var(--font-mono); margin: 0 20px 9px 0; }
.signal-detail h3 { color: #effbff; font-size: 1.125rem; font-weight: 600; line-height: 1.4; letter-spacing: -.01em; margin: 0 0 9px; }
.signal-detail > p:last-child { color: #c3d4e1; font-size: 1rem; line-height: 1.6; margin: 0; }
@keyframes signal-detail-in { from { opacity: 0; margin-bottom: -5px; } to { opacity: 1; margin-bottom: 0; } }
.signal-controls { position: relative; margin-top: 12px; display: flex; align-items: center; justify-content: space-between; gap: 10px; }
.signal-hint { color: #9ab4c4; font: .8125rem/1.5 var(--font-mono); margin: 0; }
.signal-hint-touch { display: none; }
.signal-sr-only { position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px; overflow: hidden; clip-path: inset(50%); white-space: nowrap; border: 0; }
.signal-toggle { border: 1px solid #7892a040; border-radius: 50%; width: 38px; height: 38px; flex: 0 0 38px; display: grid; place-items: center; cursor: pointer; background: #071725b3; color: #c7e8ed; }
.signal-toggle:hover { border-color: #8aebdf; background: #102c39; }
.signal-toggle[hidden] { display: none; }
.signal-toggle svg { width: 14px; height: 14px; fill: currentColor; }
.signal-toggle .signal-play { display: none; }
.signal-toggle[aria-pressed="true"] .signal-pause { display: none; }
.signal-toggle[aria-pressed="true"] .signal-play { display: block; }
.signal-evidence { background: #07121f; color: #fff; border-bottom: 1px solid #162c3a; border-top: 1px solid #274451; }
.signal-evidence .wrap { display: grid; grid-template-columns: .8fr 1.25fr 1.25fr 1fr; gap: 30px; padding-top: 24px; padding-bottom: 24px; align-items: center; }
.signal-evidence-intro { margin: 0; font: .75rem/1.6 var(--font-mono); color: #8da8b9; letter-spacing: .025em; }
.signal-evidence-intro a { display: inline-block; margin-top: 6px; color: #bcd0dc; text-decoration-thickness: 1px; text-underline-offset: 5px; }
.signal-evidence-item { padding-left: 25px; border-left: 1px solid #2b3d4c; }
.signal-evidence-item p { margin: 0; }
.signal-evidence-item strong { font-size: 1.55rem; font-weight: 500; line-height: 1.3; color: #91f0df; letter-spacing: -.025em; }
.signal-evidence-item .signal-evidence-caption { color: #d0dde8; font-size: .8125rem; margin: 3px 0; }
.signal-evidence-item .signal-evidence-source { color: #8da8b9; font-size: .75rem; line-height: 1.5; }
.signal-evidence-caveat { color: #8da8b9; font-size: .75rem; text-align: right; margin: 0; padding: 0 max(1.25rem, calc((100% - 1240px)/2)) 12px; }
@media (min-width: 1500px) {
  .signal-stage { min-height: 650px; }
}
@media (max-width: 1100px) and (min-width: 761px) {
  .signal-stage { gap: 24px; grid-template-columns: minmax(0, 1fr) minmax(0, 1.12fr); }
  .signal-stage { min-height: 615px; }
  .signal-title { font-size: clamp(2.1rem, 3.7vw, 3rem); }
  .signal-step { padding-left: 5px; padding-right: 5px; }
  .signal-visual { height: 410px; }
  .signal-actions { gap: 8px 18px; }
  .signal-evidence .wrap { gap: 18px; grid-template-columns: .8fr 1.25fr 1.25fr 1fr; }
  .signal-evidence-item { padding-left: 18px; }
}
@media (max-width: 760px) {
  .signal-stage { display: block; min-height: 0; padding: 34px 0 28px; }
  .signal-copy { width: 100%; max-width: 620px; }
  .signal-hero::after { background: linear-gradient(180deg, #050e1a 0, rgba(5,14,26,.96) 32%, transparent 58%); }
  .signal-eyebrow { font-size: .75rem; letter-spacing: .035em; gap: 9px; margin-bottom: 23px; }
  .signal-eyebrow::before { width: 16px; }
  .signal-title { font-size: clamp(2.2rem, 7.35vw, 3.4rem); max-width: 570px; }
  .signal-title .signal-subline { font-size: 1rem; margin-top: 17px; }
  .signal-description { font-size: 1rem; line-height: 1.65; }
  .signal-actions { gap: 10px 22px; }
  .signal-actions .btn { padding: 14px 18px; }
  .signal-explorer { margin-top: 36px; }
  .signal-visual { height: clamp(330px, 72vw, 430px); }
  .signal-detail { padding: 18px; bottom: 12px; }
  .signal-hint-pointer { display: none; }
  .signal-hint-touch { display: inline; }
  .signal-evidence .wrap { grid-template-columns: 1fr 1fr; gap: 22px 18px; }
  .signal-evidence-intro { padding-left: 0; }
  .signal-evidence-item { padding-left: 16px; }
  .signal-evidence-item strong { font-size: 1.5rem; }
  .signal-evidence-caveat { text-align: left; }
}
@media (max-width: 380px) {
  .signal-eyebrow { font-size: .75rem; letter-spacing: 0; }
  .signal-eyebrow::before { display: none; }
  .signal-title { font-size: 2.15rem; }
  .signal-evidence .wrap { grid-template-columns: 1fr; }
}
@media (pointer: coarse) {
  .signal-hint-pointer { display: none; }
  .signal-hint-touch { display: inline; }
  .signal-detail-close { width: 44px; height: 44px; }
  .signal-detail-kicker { margin-right: 30px; }
}