ozone-tech_owl_prime/src/styles.css

/* =========================================================
   OZON Tech Sorter — Product Demo UI
   ========================================================= */

:root {
  color-scheme: dark;
  --bg: #050910;
  --panel: rgba(10, 19, 31, 0.92);
  --panel-strong: #0c1725;
  --line: #1e3a54;
  --muted: #91a4b8;
  --text: #e5f2ff;
  --cyan: #38bdf8;
  --cyan-hover: #7dd3fc;
  --green: #4ade80;
  --orange: #f59e0b;
  --purple: #c084fc;
  --red: #fb3d4e;
  --section-max: 1200px;
  --radius: 16px;
  --tap: 44px;
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

html,
body,
#root {
  width: 100%;
  max-width: 100%;
  min-width: 0;
  overflow-x: hidden;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  min-height: 100vh;
  background:
    radial-gradient(circle at 18% 8%, rgba(56, 189, 248, 0.14), transparent 28%),
    radial-gradient(circle at 88% 18%, rgba(192, 132, 252, 0.1), transparent 24%),
    linear-gradient(160deg, #03060b 0%, #07111d 52%, #050910 100%);
  color: var(--text);
  font-size: 16px;
  line-height: 1.5;
}

img,
svg,
canvas,
video {
  max-width: 100%;
  height: auto;
}

h1,
h2,
h3,
p,
ol,
ul {
  margin: 0;
}

button,
a {
  font: inherit;
}

button {
  min-height: var(--tap);
  border: 1px solid #2a4a66;
  border-radius: 12px;
  background: #0e1b2b;
  color: var(--text);
  cursor: pointer;
  font-weight: 700;
  transition: transform 160ms ease, border-color 160ms ease, background 160ms ease;
}

button:hover {
  border-color: var(--cyan);
  background: #11273b;
  transform: translateY(-1px);
}

button:focus-visible,
.nav-link:focus-visible,
.criteria-link:focus-visible {
  outline: 2px solid var(--cyan);
  outline-offset: 2px;
}

button:disabled {
  cursor: not-allowed;
  opacity: 0.45;
  transform: none;
}

.btn-primary,
.btn-secondary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: var(--tap);
  padding: 0 22px;
  border-radius: 12px;
  font-size: 16px;
  font-weight: 700;
  text-decoration: none;
  text-align: center;
}

.btn-primary {
  border: none;
  background: linear-gradient(135deg, #38bdf8, #0ea5e9);
  color: #041018;
}

.btn-primary:hover {
  background: linear-gradient(135deg, #7dd3fc, #38bdf8);
  color: #041018;
}

.btn-secondary {
  background: #0e1b2b;
  color: var(--text);
  border: 1px solid #2a4a66;
}

.category-B { color: var(--green); }
.category-C { color: var(--orange); }
.category-D { color: var(--purple); }
.fail-text { color: var(--red); }
.pass-text { color: var(--green); }
.warning-note { color: #facc15; font-weight: 700; }
.error-note { color: var(--red); font-weight: 700; }

.proof-item em {
  display: block;
  margin-top: 2px;
  color: var(--muted);
  font-size: 12px;
  font-style: normal;
}

.proof-limits {
  margin-top: 12px;
  color: var(--muted);
  font-size: 13px;
}

.eyebrow,
.section-eyebrow {
  color: var(--cyan);
  font-size: 12px;
  font-weight: 800;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

/* ---------- Product page shell ---------- */

.product-page {
  display: flex;
  flex-direction: column;
  min-height: 100vh;
  width: 100%;
  max-width: 100%;
  overflow-x: hidden;
}

.product-main {
  flex: 1;
  width: min(100%, var(--section-max));
  max-width: 100%;
  margin: 0 auto;
  padding: 0 clamp(16px, 3vw, 28px);
  min-width: 0;
}

.site-footer {
  width: 100%;
  padding: clamp(24px, 4vw, 40px) clamp(16px, 3vw, 28px);
  border-top: 1px solid var(--line);
  color: var(--muted);
  text-align: center;
  font-size: 14px;
}

/* ---------- Header ---------- */

.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  width: 100%;
  max-width: 100%;
  padding: 12px clamp(16px, 3vw, 28px);
  border-bottom: 1px solid var(--line);
  background: rgba(5, 9, 16, 0.88);
  backdrop-filter: blur(14px);
}

.header-logo {
  display: flex;
  align-items: center;
  gap: 12px;
  min-width: 0;
}

.logo-icon {
  display: grid;
  place-items: center;
  width: 36px;
  height: 36px;
  border-radius: 10px;
  background: linear-gradient(135deg, #38bdf8, #818cf8);
  color: #041018;
  font-weight: 900;
}

.logo-text {
  display: flex;
  flex-direction: column;
  min-width: 0;
}

.logo-title {
  font-size: 15px;
  font-weight: 800;
  line-height: 1.1;
}

.logo-subtitle {
  color: var(--muted);
  font-size: 12px;
}

.header-nav {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  min-width: 0;
}

.nav-link {
  min-height: var(--tap);
  padding: 0 14px;
  border: 1px solid transparent;
  border-radius: 999px;
  background: transparent;
  color: var(--text);
  font-size: 14px;
  font-weight: 700;
}

.nav-link:hover,
.nav-reset:hover {
  border-color: var(--line);
  background: rgba(56, 189, 248, 0.08);
  color: var(--cyan);
}

.header-status-compact {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  min-height: 36px;
  padding: 0 12px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: #091522;
  color: #c8d7e8;
  font-size: 13px;
  font-weight: 700;
}

.status-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--green);
  box-shadow: 0 0 10px var(--green);
}

.status-dot.paused { background: var(--orange); box-shadow: 0 0 10px var(--orange); }
.status-dot.fault,
.status-dot.emergency_stop { background: var(--red); box-shadow: 0 0 10px var(--red); }

/* ---------- Hero ---------- */

.hero-section {
  display: grid;
  grid-template-columns: minmax(0, 1.15fr) minmax(0, 0.85fr);
  gap: clamp(24px, 4vw, 48px);
  align-items: center;
  padding: clamp(36px, 6vw, 72px) 0 clamp(40px, 6vw, 64px);
}

.hero-content,
.hero-visual {
  min-width: 0;
}

.hero-eyebrow {
  margin-bottom: 14px;
}

.hero-title {
  margin-bottom: 18px;
  font-size: clamp(2rem, 4.4vw, 3.4rem);
  line-height: 1.08;
  letter-spacing: -0.03em;
  font-weight: 900;
}

.hero-subtitle {
  max-width: 38rem;
  margin-bottom: 24px;
  color: var(--muted);
  font-size: clamp(16px, 1.5vw, 18px);
  line-height: 1.55;
}

.hero-badges {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 28px;
}

.hero-badge {
  padding: 8px 12px;
  border: 1px solid rgba(56, 189, 248, 0.24);
  border-radius: 999px;
  background: rgba(56, 189, 248, 0.1);
  color: #bfe9ff;
  font-size: 13px;
  font-weight: 700;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.hero-chain {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 10px;
  padding: clamp(18px, 3vw, 28px);
  border: 1px solid var(--line);
  border-radius: 24px;
  background:
    linear-gradient(160deg, rgba(56, 189, 248, 0.1), rgba(12, 23, 37, 0.92) 40%),
    var(--panel);
  box-shadow: 0 24px 60px rgba(0, 0, 0, 0.28);
}

.chain-step {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 10px;
  min-width: 0;
  text-align: center;
}

.chain-icon {
  display: grid;
  place-items: center;
  width: 48px;
  height: 48px;
  border: 1px solid rgba(56, 189, 248, 0.35);
  border-radius: 14px;
  background: #0d1b2a;
  color: var(--cyan);
  font-size: 16px;
  font-weight: 900;
}

.chain-step span {
  color: #c8d7e8;
  font-size: 13px;
  font-weight: 700;
}

.chain-arrow {
  display: none;
}

.hero-chain-caption {
  margin-top: 14px;
  color: var(--muted);
  font-size: 14px;
  text-align: center;
}

/* ---------- Shared sections ---------- */

.section-header {
  margin-bottom: clamp(20px, 3vw, 32px);
}

.section-header h2,
.demo-header h2,
.engineering-toggle h2 {
  margin: 8px 0 10px;
  font-size: clamp(1.5rem, 2.4vw, 2rem);
  font-weight: 800;
  letter-spacing: -0.02em;
}

.section-header p,
.demo-lead,
.engineering-lead {
  max-width: 42rem;
  color: var(--muted);
  font-size: 16px;
  line-height: 1.5;
}

/* ---------- Product demo ---------- */

.product-demo-section,
.storyline-section,
.scenario-cards-section,
.criteria-cards-section,
.engineering-details-section {
  padding: clamp(36px, 5vw, 64px) 0;
  border-top: 1px solid rgba(30, 58, 84, 0.8);
}

.demo-header {
  display: flex;
  flex-wrap: wrap;
  align-items: flex-end;
  justify-content: space-between;
  gap: 16px;
  margin-bottom: 24px;
}

.demo-status {
  display: inline-flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  min-height: 44px;
  padding: 10px 14px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: var(--panel);
  color: var(--muted);
  font-size: 14px;
}

.demo-status strong {
  color: var(--cyan);
}

.demo-layout {
  display: grid;
  grid-template-columns: minmax(0, 1.35fr) minmax(0, 0.9fr);
  gap: 20px;
  align-items: start;
}

.demo-scene-column,
.demo-result-column,
.demo-scene-container,
.demo-controls,
.demo-result-summary {
  min-width: 0;
}

.demo-mobile-hint {
  display: none;
  margin-bottom: 12px;
  color: var(--muted);
  font-size: 15px;
}

.demo-scene-container {
  padding: clamp(12px, 2vw, 18px);
  border: 1px solid var(--line);
  border-radius: 20px;
  background: var(--panel);
  box-shadow: 0 18px 50px rgba(0, 0, 0, 0.22);
}

.demo-scene-3d {
  min-height: 420px;
}

.view-mode-toggle {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-bottom: 16px;
}

.digital-twin-wrap {
  display: flex;
  flex-direction: column;
  gap: 10px;
  width: 100%;
  min-width: 0;
}

.digital-twin-canvas {
  width: 100%;
  min-width: 0;
  height: min(52vh, 520px);
  min-height: 360px;
  border-radius: 14px;
  overflow: hidden;
  background: #050910;
  border: 1px solid #1e3a54;
}

.digital-twin-simplified .digital-twin-canvas {
  height: min(46vh, 420px);
  min-height: 300px;
}

.digital-twin-canvas canvas {
  display: block;
  width: 100% !important;
  height: 100% !important;
}

.digital-twin-hud {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.twin-chip {
  display: inline-flex;
  align-items: center;
  min-height: 28px;
  padding: 4px 10px;
  border: 1px solid #284762;
  border-radius: 999px;
  background: #091522;
  color: #c8d7e8;
  font-size: 12px;
  font-weight: 700;
}

.muted-chip {
  color: var(--muted);
}

.three-fallback-note,
.three-loading {
  margin: 0 0 12px;
  padding: 10px 12px;
  border: 1px solid rgba(56, 189, 248, 0.28);
  border-radius: 12px;
  background: rgba(56, 189, 248, 0.08);
  color: #bfe9ff;
  font-size: 14px;
}

.three-capability-check {
  display: grid;
  gap: 12px;
}

.three-capability-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  font-size: 13px;
  color: var(--muted);
}

.three-capability-meta strong {
  color: var(--text);
  width: 100%;
}

.three-capability-canvas {
  width: 100%;
  height: 220px;
  border-radius: 12px;
  overflow: hidden;
  border: 1px solid var(--line);
  background: #050910;
}

.demo-result-column {
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.demo-result-summary {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 10px;
}

.summary-item {
  display: flex;
  flex-direction: column;
  gap: 4px;
  min-width: 0;
  padding: 12px;
  border: 1px solid #1a2f44;
  border-radius: 12px;
  background: #0d1b2a;
}

.summary-item span {
  color: var(--muted);
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: 0.06em;
}

.summary-item strong {
  font-size: 15px;
  word-break: break-word;
}

.demo-controls {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 10px;
}

/* ---------- Proof card ---------- */

.proof-card {
  display: flex;
  flex-direction: column;
  gap: 16px;
  padding: 20px;
  border: 1px solid var(--line);
  border-radius: 20px;
  background: var(--panel);
}

.proof-card-stopped {
  border-color: rgba(251, 61, 78, 0.55);
  box-shadow: 0 0 24px rgba(251, 61, 78, 0.12);
}

.proof-card-empty {
  min-height: 220px;
  align-items: center;
  justify-content: center;
  text-align: center;
}

.proof-card-empty h3 {
  margin: 8px 0;
  font-size: 1.25rem;
}

.proof-card-empty p,
.proof-reason p {
  color: var(--muted);
}

.proof-card-header {
  padding-bottom: 12px;
  border-bottom: 1px solid var(--line);
}

.proof-card-header h3 {
  margin-top: 4px;
  font-size: 1.25rem;
}

.proof-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 10px;
}

.proof-item {
  display: flex;
  flex-direction: column;
  gap: 4px;
  min-width: 0;
  padding: 12px;
  border: 1px solid #1a2f44;
  border-radius: 12px;
  background: #0d1b2a;
}

.proof-item-wide {
  grid-column: 1 / -1;
}

.proof-label {
  color: var(--muted);
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: 0.06em;
}

.proof-item strong {
  font-size: 16px;
  word-break: break-word;
}

.proof-details {
  display: flex;
  flex-direction: column;
  gap: 8px;
  padding: 12px;
  border: 1px solid #1a2f44;
  border-radius: 12px;
  background: #0d1b2a;
  font-size: 14px;
}

.detail-row {
  display: flex;
  justify-content: space-between;
  gap: 12px;
}

.detail-row span {
  color: var(--muted);
}

.proof-reason {
  padding: 14px 16px;
  border-left: 4px solid var(--cyan);
  border-radius: 0 12px 12px 0;
  background: rgba(56, 189, 248, 0.06);
}

.proof-reason strong {
  display: block;
  margin-bottom: 6px;
}

/* ---------- Storyline ---------- */

.storyline-stepper {
  display: grid;
  grid-template-columns: repeat(5, minmax(0, 1fr));
  gap: 12px;
  padding: 0;
  list-style: none;
}

.story-step {
  display: flex;
  flex-direction: column;
  gap: 12px;
  min-width: 0;
  padding: 16px;
  border: 1px solid var(--line);
  border-radius: 16px;
  background: var(--panel);
}

.step-indicator {
  display: grid;
  place-items: center;
  width: 36px;
  height: 36px;
  border: 2px solid #2a4a66;
  border-radius: 50%;
  background: #050910;
}

.step-number {
  font-size: 14px;
  font-weight: 800;
}

.step-content {
  display: flex;
  flex-direction: column;
  gap: 4px;
  min-width: 0;
}

.step-content strong {
  font-size: 15px;
}

.step-content span {
  color: var(--muted);
  font-size: 13px;
  line-height: 1.4;
}

.step-status-label {
  margin-top: 4px;
  font-size: 12px !important;
  font-weight: 800;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

.step-active {
  border-color: rgba(56, 189, 248, 0.7);
  background: rgba(56, 189, 248, 0.08);
  box-shadow: 0 0 0 1px rgba(56, 189, 248, 0.18);
}

.step-active .step-indicator {
  border-color: var(--cyan);
  color: var(--cyan);
}

.step-active .step-status-label {
  color: var(--cyan) !important;
}

.step-done {
  border-color: rgba(74, 222, 128, 0.45);
}

.step-done .step-indicator {
  border-color: var(--green);
  background: rgba(74, 222, 128, 0.16);
  color: var(--green);
}

.step-done .step-status-label {
  color: var(--green) !important;
}

.step-pending {
  opacity: 0.72;
}

/* ---------- Scenario cards ---------- */

.scenario-grid,
.criteria-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(min(100%, 260px), 1fr));
  gap: 16px;
}

.scenario-card,
.criteria-card {
  display: flex;
  flex-direction: column;
  gap: 12px;
  min-width: 0;
  padding: 18px;
  border: 1px solid var(--line);
  border-radius: 16px;
  background: var(--panel);
}

.scenario-card:hover,
.criteria-card:hover {
  border-color: rgba(56, 189, 248, 0.45);
  transform: translateY(-2px);
  transition: border-color 160ms ease, transform 160ms ease;
}

.scenario-card.active {
  border-color: var(--cyan);
  background: rgba(56, 189, 248, 0.06);
  box-shadow: 0 0 0 1px rgba(56, 189, 248, 0.25);
}

.scenario-card-header,
.criteria-card-header {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 10px;
}

.scenario-card-header h3,
.criteria-card-header h3 {
  font-size: 1.05rem;
  line-height: 1.25;
}

.scenario-desc,
.criteria-evidence {
  color: var(--muted);
  font-size: 15px;
  line-height: 1.45;
  flex: 1;
}

.scenario-expected {
  display: flex;
  flex-direction: column;
  gap: 4px;
  padding: 12px;
  border-radius: 12px;
  background: #0d1b2a;
  border: 1px solid #1a2f44;
  font-size: 14px;
}

.scenario-expected span {
  color: #7f93a8;
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.result-badge,
.status-badge {
  display: inline-flex;
  align-items: center;
  min-height: 28px;
  padding: 4px 10px;
  border-radius: 999px;
  font-size: 12px;
  font-weight: 800;
  white-space: nowrap;
}

.tone-b { background: rgba(74, 222, 128, 0.12); color: var(--green); }
.tone-c { background: rgba(245, 158, 11, 0.12); color: var(--orange); }
.tone-d { background: rgba(192, 132, 252, 0.12); color: var(--purple); }
.tone-mixed { background: rgba(56, 189, 248, 0.12); color: var(--cyan); }
.tone-fault { background: rgba(251, 61, 78, 0.12); color: #fda4af; }

.status-covered,
.status-badge.status-covered {
  background: rgba(74, 222, 128, 0.12);
  color: var(--green);
}

.status-demo,
.status-badge.status-demo {
  background: rgba(192, 132, 252, 0.12);
  color: var(--purple);
}

.criteria-footer {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  padding-top: 12px;
  border-top: 1px solid var(--line);
  color: var(--muted);
  font-size: 14px;
}

.criteria-link {
  min-height: 36px;
  padding: 0 10px;
  border: 1px solid rgba(56, 189, 248, 0.28);
  border-radius: 999px;
  background: rgba(56, 189, 248, 0.08);
  color: var(--cyan);
  font-size: 13px;
  font-weight: 700;
}

/* ---------- Engineering details ---------- */

.engineering-toggle {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: clamp(18px, 3vw, 24px);
  border: 1px solid var(--line);
  border-radius: 18px;
  background: var(--panel);
}

.engineering-content {
  margin-top: 20px;
}

.engineering-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(min(100%, 320px), 1fr));
  gap: 16px;
  margin-top: 16px;
}

.eng-panel {
  min-width: 0;
  padding: 14px;
  border: 1px solid var(--line);
  border-radius: 16px;
  background: var(--panel);
  overflow: hidden;
}

.eng-panel-wide {
  grid-column: 1 / -1;
}

.eng-panel .panel {
  border: none;
  background: transparent;
  box-shadow: none;
  padding: 0;
}

/* ---------- Scene ---------- */

.scene-wrap {
  width: 100%;
  min-width: 0;
}

.scene-title-row,
.scene-simple-header,
.panel-heading {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 12px;
}

.scene-simple-header {
  align-items: center;
}

.sorter-svg {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  border-radius: 16px;
  background: #060d16;
}

.machine-state-chip,
.status-pill,
.scenario-label {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  min-height: 34px;
  padding: 6px 12px;
  border: 1px solid #284762;
  border-radius: 999px;
  background: #091522;
  color: #c8d7e8;
  font-size: 12px;
  font-weight: 800;
}

.fault-chip {
  border-color: var(--red);
  color: #fecdd3;
}

.zone rect {
  fill: rgba(14, 27, 43, 0.82);
  stroke-width: 2;
}

.zone text,
.device text,
.gate text,
.pusher text,
.item-label,
.scale-label {
  fill: #b8c8da;
  font-size: 14px;
  font-weight: 700;
  text-anchor: middle;
}

.zone-label-large {
  fill: #f4fbff !important;
  font-size: 34px !important;
  font-weight: 900 !important;
}

.zone-a rect { stroke: #38bdf8; }
.zone-b rect { stroke: #4ade80; }
.zone-c rect { stroke: #f59e0b; }
.zone-d rect { stroke: #c084fc; }

.zone-active rect {
  fill: rgba(56, 189, 248, 0.08);
  filter: drop-shadow(0 0 10px rgba(56, 189, 248, 0.25));
}

.zone-b.zone-active rect { fill: rgba(74, 222, 128, 0.12); }
.zone-c.zone-active rect { fill: rgba(245, 158, 11, 0.12); }
.zone-d.zone-active rect { fill: rgba(192, 132, 252, 0.12); }

.device rect,
.device circle {
  fill: #0f2031;
  stroke: #31526d;
  stroke-width: 2;
}

.device line {
  stroke: #31526d;
  stroke-width: 2;
  stroke-dasharray: 6 5;
}

.device.active rect,
.device.active circle {
  stroke: var(--cyan);
  filter: drop-shadow(0 0 10px rgba(56, 189, 248, 0.7));
}

.device.active line {
  stroke: var(--cyan);
}

.gate line {
  stroke-width: 7;
  stroke-linecap: round;
}

.gate.open line {
  stroke: var(--green);
  transform: rotate(22deg);
  transform-origin: 680px 315px;
}

.gate.closed line {
  stroke: var(--red);
}

.pusher rect {
  fill: #101d2d;
  stroke: #395873;
  stroke-width: 2;
}

.pusher.extended rect {
  stroke: var(--orange);
  filter: drop-shadow(0 0 12px rgba(245, 158, 11, 0.55));
}

.conveyor {
  fill: #101f30;
  stroke: #4b647d;
  stroke-width: 2;
}

.conveyor.stopped {
  fill: #2a1219;
  stroke: var(--red);
  filter: drop-shadow(0 0 12px rgba(251, 61, 78, 0.35));
}

.belt-center {
  stroke: #7b8fa5;
  stroke-width: 2;
  stroke-dasharray: 18 12;
}

.roller-line {
  stroke: #243d55;
  stroke-width: 3;
}

.dimension-line line {
  stroke: #6c849d;
  stroke-width: 1.4;
  stroke-dasharray: 5 5;
}

.dimension-line circle {
  fill: #6c849d;
}

.dimension-line text,
.legend-item text,
.route-command text {
  fill: #d9e8f7;
  font-size: 12px;
  font-weight: 800;
  text-anchor: middle;
}

.scene-legend text {
  text-anchor: start;
  fill: #b8c8da;
  font-size: 11px;
}

.route-guide {
  fill: none;
  stroke-width: 3;
  stroke-dasharray: 10 9;
  opacity: 0.34;
}

.route-b { stroke: var(--green); }
.route-c { stroke: var(--orange); }
.route-d { stroke: var(--purple); }

.route-active {
  opacity: 1;
  stroke-width: 4;
}

.route-command text {
  fill: #05101b;
  font-size: 13px;
}

.bbox rect {
  fill: none;
  stroke: var(--cyan);
  stroke-width: 2;
  stroke-dasharray: 6 5;
  filter: drop-shadow(0 0 8px rgba(56, 189, 248, 0.7));
}

.bbox text {
  fill: var(--cyan);
  font-size: 12px;
  text-anchor: middle;
  font-weight: 800;
}

.fault-overlay rect {
  fill: rgba(54, 12, 22, 0.88);
  stroke: var(--red);
  stroke-width: 2;
}

.fault-overlay text {
  fill: #fecdd3;
  font-size: 16px;
  font-weight: 900;
  text-anchor: middle;
}

.left-label {
  text-anchor: start;
}

/* ---------- Engineering panels ---------- */

.panel {
  border: 1px solid var(--line);
  border-radius: 20px;
  background: var(--panel);
}

.compact-panel,
.metrics-panel,
.pid-panel,
.event-panel,
.scenario-panel,
.timeline-panel,
.criteria-panel {
  padding: 4px;
}

.kv-grid {
  display: grid;
  grid-template-columns: minmax(0, 120px) minmax(0, 1fr);
  gap: 9px 12px;
  font-size: 13px;
}

.kv-grid span,
.muted {
  color: var(--muted);
}

.state-list {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 7px;
}

.state {
  display: flex;
  align-items: center;
  gap: 7px;
  min-width: 0;
  padding: 7px 8px;
  border: 1px solid #243e57;
  border-radius: 9px;
  color: #95a7bc;
  font-size: 11px;
  font-weight: 800;
}

.state span {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: #33485c;
  flex-shrink: 0;
}

.state.active {
  color: #f4fbff;
  border-color: var(--cyan);
  background: rgba(56, 189, 248, 0.11);
}

.state.active span {
  background: var(--cyan);
  box-shadow: 0 0 14px var(--cyan);
}

.sensor-stack {
  display: grid;
  gap: 8px;
}

.sensor-row {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  padding: 10px;
  border: 1px solid #243e57;
  border-radius: 12px;
  background: #0b1725;
}

.sensor-row.active {
  border-color: var(--cyan);
  box-shadow: inset 0 0 0 1px rgba(56, 189, 248, 0.2);
}

.sensor-row strong,
.sensor-row span,
.sensor-meta span {
  display: block;
  font-size: 12px;
}

.sensor-row span,
.sensor-meta span {
  color: var(--muted);
}

.sensor-meta {
  text-align: right;
}

.actuator-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 8px;
  margin-top: 10px;
}

.actuator-grid div,
.pid-bars div {
  padding: 9px;
  border: 1px solid #243e57;
  border-radius: 12px;
  background: #081422;
}

.actuator-grid span,
.pid-bars span {
  display: block;
  color: var(--muted);
  font-size: 11px;
}

.actuator-grid strong,
.pid-bars strong {
  font-size: 13px;
}

.metric-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 8px;
}

.metric-card {
  min-height: 78px;
  min-width: 0;
  padding: 10px;
  border: 1px solid #243e57;
  border-radius: 14px;
  background: linear-gradient(180deg, #0b1725, #07111d);
}

.metric-card span,
.metric-card em {
  display: block;
  color: var(--muted);
  font-size: 11px;
  font-style: normal;
}

.metric-card strong {
  display: block;
  margin: 5px 0;
  font-size: 20px;
  letter-spacing: -0.04em;
}

.pid-bars {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 8px;
}

.speed-track {
  height: 10px;
  margin: 12px 0;
  overflow: hidden;
  border-radius: 999px;
  background: #102034;
}

.speed-track div {
  height: 100%;
  background: linear-gradient(90deg, var(--cyan), var(--green));
}

.pid-sparkline {
  width: 100%;
  height: 72px;
  margin: 4px 0 10px;
  border: 1px solid #243e57;
  border-radius: 12px;
  background: #071423;
}

.pid-sparkline path {
  stroke: #223c55;
  stroke-width: 1;
}

.pid-sparkline polyline {
  fill: none;
  stroke: var(--cyan);
  stroke-width: 3;
  stroke-linejoin: round;
  stroke-linecap: round;
}

.timeline-summary {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(90px, 1fr));
  gap: 6px;
  margin-bottom: 10px;
}

.timeline-summary div {
  padding: 8px;
  border: 1px solid #243e57;
  border-radius: 10px;
  background: #081422;
}

.timeline-summary span,
.timeline-summary strong {
  display: block;
  font-size: 11px;
}

.timeline-summary span {
  color: var(--muted);
}

.timeline-list {
  display: grid;
  gap: 6px;
  max-height: 260px;
  overflow: auto;
}

.timeline-row {
  display: grid;
  grid-template-columns: 14px minmax(0, 1fr) 60px 62px 58px;
  align-items: center;
  gap: 7px;
  padding: 7px 8px;
  border: 1px solid #203950;
  border-radius: 10px;
  color: #b8c8da;
  font-size: 11px;
}

.timeline-row em {
  color: var(--muted);
  font-style: normal;
  font-weight: 800;
}

.timeline-dot {
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: #31485f;
}

.timeline-row.done .timeline-dot { background: var(--green); }
.timeline-row.active {
  border-color: var(--cyan);
  background: rgba(56, 189, 248, 0.09);
}
.timeline-row.active .timeline-dot {
  background: var(--cyan);
  box-shadow: 0 0 12px var(--cyan);
}
.timeline-row.skipped { opacity: 0.48; }

.event-table {
  overflow: auto;
  max-height: 290px;
  max-width: 100%;
  border: 1px solid #243e57;
  border-radius: 14px;
}

.event-row {
  display: grid;
  grid-template-columns: 62px 84px 116px 88px 128px minmax(160px, 1fr) 68px;
  gap: 8px;
  min-width: 720px;
  padding: 8px 10px;
  border-bottom: 1px solid #172d42;
  color: #c8d7e8;
  font-size: 12px;
}

.event-head {
  position: sticky;
  top: 0;
  z-index: 1;
  background: #0d1b2b;
  color: var(--muted);
  font-weight: 800;
  text-transform: uppercase;
}

.event-row.warning { color: #facc15; }
.event-row.error { color: #fb7185; }
.event-row.success { color: #86efac; }

.empty-log {
  padding: 16px;
  color: var(--muted);
}

.log-filters {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-bottom: 10px;
}

.log-filters button,
.small-button {
  min-height: 32px;
  padding: 4px 8px;
  font-size: 11px;
}

.log-filters button.active {
  border-color: var(--cyan);
  background: rgba(56, 189, 248, 0.12);
}

.scenario-buttons {
  display: grid;
  gap: 8px;
  max-height: 320px;
  overflow: auto;
}

.scenario-buttons button {
  padding: 10px;
  text-align: left;
}

.scenario-buttons button strong,
.scenario-buttons button span,
.scenario-buttons button em {
  display: block;
}

.scenario-buttons button span,
.scenario-buttons button em {
  margin-top: 4px;
  color: var(--muted);
  font-size: 12px;
  font-weight: 500;
  font-style: normal;
}

.scenario-buttons button.active {
  border-color: var(--cyan);
  background: rgba(56, 189, 248, 0.12);
}

.criteria-filters {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-bottom: 10px;
}

.criteria-filters button {
  min-height: 32px;
  padding: 4px 8px;
  font-size: 11px;
}

.criteria-filters button.active {
  border-color: var(--cyan);
  background: rgba(56, 189, 248, 0.12);
}

.criteria-list {
  display: grid;
  gap: 8px;
  max-height: 320px;
  overflow: auto;
}

.criterion-card {
  padding: 10px;
  border: 1px solid #243e57;
  border-radius: 13px;
  background: #081422;
}

.criterion-card.related {
  border-color: var(--green);
  background: rgba(74, 222, 128, 0.07);
}

.criterion-card div {
  display: flex;
  justify-content: space-between;
  gap: 8px;
  margin-bottom: 6px;
}

.criterion-card strong,
.criterion-card p,
.criterion-card em {
  display: block;
  font-size: 12px;
}

.criterion-card p {
  color: #c1d1e3;
  line-height: 1.35;
}

.criterion-card em {
  margin-top: 6px;
  color: var(--muted);
  font-style: normal;
}

.criterion-status {
  white-space: nowrap;
  color: var(--cyan);
  font-size: 10px;
  font-weight: 900;
  text-transform: uppercase;
}

.criteria-count {
  padding: 5px 9px;
  border: 1px solid #284762;
  border-radius: 999px;
  background: #071423;
  color: #b9cce0;
  font-size: 11px;
  font-weight: 750;
}

.status-covered { color: var(--green); }
.status-partially-covered { color: var(--orange); }
.status-demo-step-available { color: var(--purple); }

.pseudo-cv-block {
  margin-top: 12px;
  padding: 10px;
  border: 1px solid #24445f;
  border-radius: 14px;
  background: #071423;
}

.pseudo-cv-block h3 {
  margin: 0 0 8px;
  color: var(--cyan);
  font-size: 12px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.compact-kv {
  grid-template-columns: minmax(0, 116px) minmax(0, 1fr);
}

.rule-stack {
  display: grid;
  gap: 9px;
}

.rule-card {
  padding: 10px;
  border: 1px solid #243e57;
  border-radius: 13px;
  background: #081422;
}

.rule-card div {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
  margin-bottom: 6px;
}

.rule-card strong {
  font-size: 13px;
}

.rule-card p {
  color: var(--muted);
  font-size: 12px;
  line-height: 1.35;
}

.verdict,
.decision-badge {
  display: inline-flex;
  align-items: center;
  min-height: 22px;
  padding: 3px 8px;
  border: 1px solid #334d66;
  border-radius: 999px;
  font-size: 10px;
  font-weight: 900;
  letter-spacing: 0.06em;
}

.verdict.pass { color: var(--green); border-color: var(--green); }
.verdict.fail { color: var(--orange); border-color: var(--orange); }
.verdict.pending,
.verdict.skipped { color: var(--muted); }

.decision-tree {
  display: grid;
  gap: 8px;
  padding-left: 20px;
  color: #b8c8da;
  font-size: 13px;
}

.decision-tree li {
  padding: 8px 10px;
  border: 1px solid #243e57;
  border-radius: 10px;
  background: #0b1725;
}

.decision-tree .pass { border-color: rgba(74, 222, 128, 0.65); }
.decision-tree .fail { border-color: rgba(245, 158, 11, 0.7); }

/* ---------- Responsive ---------- */

@media (max-width: 1199px) {
  .hero-section {
    grid-template-columns: 1fr;
  }

  .hero-chain {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .demo-layout {
    grid-template-columns: 1fr;
  }

  .storyline-stepper {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

@media (max-width: 899px) {
  .storyline-stepper {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .metric-grid,
  .state-list,
  .actuator-grid,
  .pid-bars {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (max-width: 639px) {
  .site-header {
    align-items: stretch;
  }

  .header-nav {
    width: 100%;
  }

  .nav-link {
    flex: 1 1 calc(50% - 8px);
  }

  .header-status-compact {
    width: 100%;
    justify-content: center;
  }

  .hero-section {
    padding-top: 28px;
  }

  .hero-title {
    font-size: clamp(1.75rem, 8vw, 2.2rem);
  }

  .hero-actions,
  .demo-controls {
    grid-template-columns: 1fr;
    display: grid;
  }

  .hero-actions .btn-primary,
  .hero-actions .btn-secondary,
  .demo-controls .btn-primary,
  .demo-controls .btn-secondary {
    width: 100%;
  }

  .hero-chain {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .demo-mobile-hint {
    display: block;
  }

  .demo-result-summary,
  .proof-grid {
    grid-template-columns: 1fr;
  }

  .storyline-stepper,
  .scenario-grid,
  .criteria-grid,
  .engineering-grid {
    grid-template-columns: 1fr;
  }

  .engineering-toggle {
    flex-direction: column;
    align-items: stretch;
  }

  .engineering-toggle .btn-secondary {
    width: 100%;
  }

  .metric-grid,
  .state-list,
  .actuator-grid,
  .pid-bars,
  .timeline-summary {
    grid-template-columns: 1fr;
  }

  .timeline-row {
    grid-template-columns: 14px minmax(0, 1fr);
  }

  .timeline-row em:nth-child(n + 3) {
    display: none;
  }
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  button,
  .scenario-card,
  .criteria-card {
    transition: none;
  }
}