/* AI-integration approach section: compact header, agent-harness map, task-run strip */

/* APPROACH - dark poster tuned to the same tone as the hero */
#approach {
  overflow-x: clip;
}
#approach .section__bg {
  background-image: url("../../assets/stock/sage-green-waves-01.jpg");
  opacity: 0.62;
  background-position: right center;
  mix-blend-mode: multiply;
}
#approach .section__bg-duotone {
  background:
    radial-gradient(120% 120% at 84% 8%, rgba(200, 85, 43, 0.3), transparent 55%),
    linear-gradient(180deg, rgba(28, 20, 16, 0.62), rgba(28, 20, 16, 0.92));
  opacity: 1;
  mix-blend-mode: normal;
}
/* diagonal-slash overlay, drawn inside the approach bg layer only */
#approach .section__bg::after {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background: repeating-linear-gradient(
    -52deg,
    transparent 0 38px,
    rgba(200, 85, 43, 0.08) 38px 40px
  );
}
#approach .section-index {
  font-size: clamp(3.5rem, 6vw, 6rem);
  top: clamp(76px, 6vw, 92px);
  opacity: 0.3;
}

/* ---------------------------------------------------- HEADER */
.approach__inner {
  padding-top: clamp(52px, 6.5vw, 100px);
  padding-bottom: clamp(56px, 7vw, 104px);
}
.approach__head {
  display: grid;
  grid-template-columns: minmax(0, 1.3fr) minmax(0, 0.8fr);
  gap: clamp(18px, 3.5vw, 60px);
  align-items: end;
}
.approach__head-main { min-width: 0; }
.approach__headline {
  font-size: clamp(2rem, 4.6vw, 4rem);
  max-width: 20ch;
  margin: 0;
}
.approach__hl-mark { color: var(--clay); }
.approach__hl-mark.rn-plain { color: var(--clay); }
.approach__lead {
  color: var(--paper);
  margin: 0;
  max-width: 44ch;
  padding-left: clamp(14px, 1.6vw, 26px);
  border-left: 1px solid var(--hairline-dark);
  font-size: clamp(0.98rem, 1.15vw, 1.1rem);
  line-height: 1.6;
}

/* ---------------------------------------------------- BLOCK SCAFFOLD */
.approach__block { margin-top: clamp(40px, 5.5vw, 84px); }
.approach__block-head {
  display: flex;
  flex-direction: column;
  gap: 9px;
  margin-bottom: clamp(18px, 2.6vw, 34px);
}
.approach__block-title {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(1.22rem, 2.1vw, 1.8rem);
  line-height: 1.08;
  letter-spacing: -0.01em;
  margin: 0;
  color: var(--paper);
}
.approach__block-caption {
  margin: 0;
  font-size: 10px;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  line-height: 1.5;
  color: var(--paper-soft);
  max-width: 78ch;
}

/* ---------------------------------------------------- HARNESS MAP */
.hmap {
  position: relative;
  padding-top: clamp(10px, 1.4vw, 20px);
}
.hmap__wires {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  z-index: 0;
  overflow: visible;
  pointer-events: none;
}
.hmap__wire {
  fill: none;
  stroke: rgba(183, 167, 147, 0.34);
  stroke-width: 1;
}
.hmap__tick {
  fill: none;
  stroke: rgba(200, 85, 43, 0.3);
  stroke-width: 1;
  stroke-dasharray: 2 5;
}
.hmap__pulse {
  fill: none;
  stroke: var(--terracotta);
  stroke-width: 2;
  stroke-linecap: round;
  stroke-dasharray: 9 100;
  stroke-dashoffset: 109;
  opacity: 0;
  animation: hmap-pulse 3.4s linear infinite;
}
@keyframes hmap-pulse {
  0% { stroke-dashoffset: 109; opacity: 0; }
  3% { opacity: 1; }
  19% { stroke-dashoffset: 9; opacity: 1; }
  23% { stroke-dashoffset: 9; opacity: 0; }
  100% { stroke-dashoffset: 9; opacity: 0; }
}
@media (prefers-reduced-motion: reduce) {
  .hmap__pulse { display: none; }
}

.hmap__flow {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: 0.92fr 1fr 1.14fr 0.8fr 0.92fr;
  gap: clamp(18px, 3vw, 52px);
  align-items: center;
}
.hmap__stage {
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: clamp(8px, 0.9vw, 12px);
  min-width: 0;
}
.hnode {
  display: flex;
  flex-direction: column;
  gap: 5px;
  padding: clamp(9px, 1vw, 13px) clamp(10px, 1.1vw, 15px);
  background: rgba(28, 20, 16, 0.74);
  border: 1px solid var(--hairline-dark);
}
.hnode__label {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(0.82rem, 1.02vw, 0.98rem);
  line-height: 1.16;
  letter-spacing: -0.01em;
  color: var(--paper);
}
.hnode__note {
  font-size: 10px;
  line-height: 1.42;
  letter-spacing: 0.02em;
  color: var(--paper-soft);
}
.hnode__ctx {
  font-size: 9px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  line-height: 1.2;
  color: var(--terracotta);
  opacity: 0.9;
}
.hnode--in { border-left: 3px solid var(--clay); }
.hnode--main {
  border-color: var(--terracotta);
  background: rgba(200, 85, 43, 0.12);
  padding-block: clamp(13px, 1.6vw, 22px);
}
.hnode--main .hnode__label { font-size: clamp(0.98rem, 1.32vw, 1.26rem); }
.hnode--sub {
  border-style: dashed;
  border-color: rgba(183, 167, 147, 0.46);
  background: rgba(28, 20, 16, 0.58);
}
.hnode--gate { border-color: var(--clay); }
.hnode--out { border-left: 3px solid var(--terracotta); }

/* shared bus below the map: memory, rules, skills, formats */
.hmap__bus {
  position: relative;
  z-index: 1;
  margin-top: clamp(26px, 3.4vw, 54px);
}
.hmap__rail {
  position: relative;
  border-top: 1px solid var(--terracotta);
  padding-top: 9px;
}
.hmap__rail-label {
  font-size: 10px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--terracotta);
}
.hmap__bus-items {
  list-style: none;
  margin: clamp(10px, 1.4vw, 16px) 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: clamp(14px, 2.2vw, 40px);
}
.hmap__bus-item {
  display: flex;
  flex-direction: column;
  gap: 6px;
  padding-left: 13px;
  border-left: 1px solid var(--hairline-dark);
}
.hmap__bus-label {
  font-size: 10px;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  line-height: 1.3;
  color: var(--paper);
}
.hmap__bus-note {
  font-family: var(--font-body);
  font-size: 0.86rem;
  line-height: 1.5;
  color: var(--paper-soft);
}

/* ---------------------------------------------------- TASK RUNS */
.run-strip__grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  border-top: 1px solid var(--hairline-dark);
  border-left: 1px solid var(--hairline-dark);
}
.run {
  display: flex;
  flex-direction: column;
  gap: 11px;
  padding: clamp(13px, 1.5vw, 20px);
  border-right: 1px solid var(--hairline-dark);
  border-bottom: 1px solid var(--hairline-dark);
  background: rgba(28, 20, 16, 0.42);
}
.run:nth-child(even) { background: rgba(200, 85, 43, 0.05); }
.run__top {
  display: flex;
  align-items: baseline;
  gap: 8px;
}
.run__num {
  font-size: 10px;
  letter-spacing: 0.06em;
  color: var(--clay);
}
.run__area {
  font-size: 11px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--terracotta);
}
.run__chain {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 4px 7px;
}
.run__step {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  font-size: 9.5px;
  line-height: 1.35;
  letter-spacing: 0.02em;
  color: var(--paper-soft);
}
.run__step:not(:last-child)::after {
  content: "\2192";
  color: var(--terracotta);
  opacity: 0.75;
}
.run__times {
  margin-top: auto;
  display: flex;
  flex-direction: column;
  gap: 7px;
  padding-top: 11px;
  border-top: 1px solid var(--hairline-dark);
}
.run__row {
  display: grid;
  grid-template-columns: auto minmax(24px, 1fr) auto;
  align-items: center;
  gap: 8px;
}
.run__row-label {
  font-size: 9px;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--paper-soft);
}
.run__bar {
  display: block;
  height: 4px;
  background: rgba(183, 167, 147, 0.16);
}
.run__fill {
  display: block;
  height: 100%;
  background: rgba(183, 167, 147, 0.45);
}
.run__row--agent .run__fill { background: var(--terracotta); }
.run__val {
  font-size: 11px;
  color: var(--paper);
  white-space: nowrap;
}
.run__row--agent .run__val { color: var(--terracotta); }

/* expanded detail: manual routine vs. the agent run */
.run-details {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: clamp(16px, 2.2vw, 32px);
  padding-top: clamp(18px, 2.4vw, 30px);
}
.run-detail {
  display: flex;
  flex-direction: column;
  gap: 9px;
  padding-left: 14px;
  border-left: 1px solid var(--hairline-dark);
}
.run-detail__area {
  font-size: 10px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--terracotta);
}
.run-detail__before {
  margin: 0;
  font-family: var(--font-body);
  font-size: 0.86rem;
  line-height: 1.5;
  color: var(--paper-soft);
}
.run-detail__before::before {
  content: "-\00a0";
  opacity: 0.6;
}
.run-detail__after {
  margin: 0;
  font-family: var(--font-body);
  font-size: 0.9rem;
  line-height: 1.5;
  color: var(--paper);
}
.run-detail__after::before {
  content: "\2192\00a0";
  color: var(--terracotta);
  font-weight: 700;
}
.run-detail__more {
  margin: auto 0 0;
  padding-top: 9px;
  border-top: 1px solid var(--hairline-dark);
  font-size: 9px;
  letter-spacing: 0.03em;
  line-height: 1.45;
  color: var(--paper-soft);
  opacity: 0.85;
}

/* ---------------------------------------------------- RESPONSIVE */
@media (max-width: 1080px) {
  .approach__head { grid-template-columns: 1fr; }
  .approach__lead {
    max-width: 62ch;
    padding-left: 0;
    padding-top: 16px;
    border-left: none;
    border-top: 1px solid var(--hairline-dark);
  }
  .hmap__flow {
    grid-template-columns: 1fr;
    gap: clamp(22px, 4vw, 36px);
  }
  .hmap__stage--fan {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 12px;
  }
  .run-strip__grid { grid-template-columns: 1fr 1fr; }
  .run-details { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 720px) {
  #approach .section-index { font-size: clamp(3.2rem, 16vw, 6rem); top: clamp(76px, 12vw, 92px); opacity: 0.2; }
  .hmap__stage--fan { grid-template-columns: 1fr; }
  .hmap__bus-items { grid-template-columns: 1fr; }
  .run-strip__grid { grid-template-columns: 1fr; }
  .run-details { grid-template-columns: 1fr; }
  .hnode__note { font-size: 10.5px; }
  .run__step { font-size: 10.5px; }
}

/* ===== Collapsible run details ===== */
.approach__toggle { margin-top: clamp(20px, 2.4vw, 30px); }
.approach__toggle .approach__toggle-icon { display: inline-block; margin-left: 10px; transition: transform .3s var(--ease-out); }
.approach__toggle[aria-expanded="true"] .approach__toggle-icon { transform: rotate(180deg); }
.approach__more { height: 0; overflow: hidden; opacity: 0; transition: height .45s var(--ease-out), opacity .4s ease; }
.approach__more.is-open { opacity: 1; }
@media (prefers-reduced-motion: reduce) {
  .approach__more { transition: none; }
  .approach__toggle .approach__toggle-icon { transition: none; }
}