/* ===================================================================
   GipnoArkSystems — Main Stylesheet
   Aesthetic: Industrial Editorial / Dark Precision
   =================================================================== */

/* ----- Reset & Base ----- */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

:root {
  --bg:        #080810;
  --bg2:       #0c0c18;
  --bg3:       #101020;
  --surface:   #161628;
  --surface2:  #1e1e34;
  --text:      #e8e0d0;
  --text-muted: #7a7a9a;
  --accent:    #ff6b35;
  --accent2:   #00d4ff;
  --purple:    #a78bfa;
  --green:     #4ade80;
  --amber:     #f59e0b;
  --border:    rgba(255, 255, 255, 0.07);
  --border-accent: rgba(255, 107, 53, 0.25);

  --font-display: 'Space Grotesk', 'Noto Sans JP', sans-serif;
  --font-mono:    'JetBrains Mono', 'Courier New', monospace;
  --font-body:    'Noto Sans JP', 'Space Grotesk', sans-serif;

  --radius: 6px;
  --shadow: 0 24px 60px rgba(0, 0, 0, 0.55);
}

/* 視覚的に非表示だが検索・スクリーンリーダーには認識される要素 */
.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip-path: inset(50%);
  white-space: nowrap;
  border: 0;
}

html {
  scroll-behavior: smooth;
}

body {
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.75;
  -webkit-font-smoothing: antialiased;
}

a {
  color: inherit;
  text-decoration: none;
}

ul {
  list-style: none;
}

/* ===================================================================
   NAVIGATION
   =================================================================== */
.nav {
  position: fixed;
  inset-block-start: 0;
  inset-inline: 0;
  z-index: 200;
  background: rgba(8, 8, 16, 0.82);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--border);
}

.nav-inner {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 2rem;
  height: 64px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.nav-logo {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1rem;
  letter-spacing: -0.02em;
}

.nav-logo-icon {
  width: 24px;
  height: 24px;
  object-fit: contain;
}

.nav-links {
  display: flex;
  gap: 2.25rem;
}

.nav-links a {
  font-family: var(--font-display);
  font-size: 0.85rem;
  color: var(--text-muted);
  transition: color 0.2s;
}

.nav-links a:hover {
  color: var(--text);
}

/* ===================================================================
   HERO
   =================================================================== */
.hero {
  min-height: 100vh;
  padding-top: 64px;
  display: flex;
  align-items: center;
  position: relative;
  overflow: hidden;
}

.hero-bg-grid {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(255, 107, 53, 0.025) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 107, 53, 0.025) 1px, transparent 1px);
  background-size: 64px 64px;
  pointer-events: none;
}

/* Radial fade so grid doesn't overwhelm */
.hero-bg-grid::after {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(ellipse 60% 70% at 30% 50%, transparent 30%, var(--bg) 100%);
}

.hero-layout {
  position: relative;
  z-index: 1;
  max-width: 1200px;
  width: 100%;
  margin: 0 auto;
  padding: 0 2rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 2rem;
}

.hero-content {
  flex: 1;
  min-width: 0;
  padding: 5rem 0 4rem;
}

.hero-label {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: var(--accent);
  letter-spacing: 0.12em;
  margin-bottom: 1.5rem;
  opacity: 0;
  animation: fadeInUp 0.6s 0.1s ease forwards;
}

.hero-title {
  font-family: var(--font-display);
  font-size: clamp(2.8rem, 8vw, 6rem);
  font-weight: 700;
  line-height: 1.06;
  letter-spacing: -0.03em;
  margin-bottom: 1.5rem;
  opacity: 0;
  animation: fadeInUp 0.6s 0.22s ease forwards;
}

.hero-title span {
  display: block;
  background: linear-gradient(150deg, var(--text) 0%, rgba(232, 224, 208, 0.55) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-desc {
  font-size: 1rem;
  color: var(--text-muted);
  max-width: 500px;
  margin-bottom: 2.5rem;
  line-height: 1.9;
  opacity: 0;
  animation: fadeInUp 0.6s 0.38s ease forwards;
}

.hero-cta {
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
  opacity: 0;
  animation: fadeInUp 0.6s 0.52s ease forwards;
}

.hero-visual {
  flex-shrink: 0;
  pointer-events: none;
  display: flex;
  align-items: center;
}

.hero-icon {
  width: min(380px, 38vw);
  height: auto;
  opacity: 0.85;
  filter: drop-shadow(0 0 32px rgba(255, 107, 53, 0.35));
}

/* ===================================================================
   BUTTONS
   =================================================================== */
.btn {
  display: inline-flex;
  align-items: center;
  padding: 0.7rem 1.6rem;
  font-family: var(--font-display);
  font-size: 0.875rem;
  font-weight: 600;
  border-radius: var(--radius);
  border: 1px solid transparent;
  cursor: pointer;
  transition: background 0.18s, border-color 0.18s, transform 0.15s, color 0.18s;
  text-align: center;
}

.btn-primary {
  background: var(--accent);
  color: #fff;
  border-color: var(--accent);
}

.btn-primary:hover {
  background: #e85d28;
  border-color: #e85d28;
  transform: translateY(-1px);
}

.btn-outline {
  background: transparent;
  color: var(--text-muted);
  border-color: var(--border);
}

.btn-outline:hover {
  border-color: var(--accent);
  color: var(--accent);
}

.btn-large {
  padding: 0.9rem 2.4rem;
  font-size: 0.95rem;
}

.btn:disabled {
  background: var(--border);
  border-color: var(--border);
  color: var(--text-muted);
  cursor: not-allowed;
  opacity: 0.6;
  transform: none;
}

/* ===================================================================
   SECTIONS — shared utilities
   =================================================================== */
.section {
  padding: 8rem 0;
}

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 2rem;
}

.section-header {
  margin-bottom: 4rem;
}

.section-label {
  display: block;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--accent);
  letter-spacing: 0.18em;
  text-transform: uppercase;
  margin-bottom: 1rem;
}

.section-title {
  font-family: var(--font-display);
  font-size: clamp(2rem, 5vw, 3.25rem);
  font-weight: 700;
  letter-spacing: -0.025em;
  line-height: 1.18;
  margin-bottom: 1rem;
}

.section-desc {
  font-size: 0.95rem;
  color: var(--text-muted);
  max-width: 540px;
  line-height: 1.8;
}

/* ===================================================================
   01 — SERVICE / CHAT MOCKUP
   =================================================================== */
.service-section {
  background: var(--bg2);
  padding: 6rem 0 5.5rem;
}

.service-layout {
  display: grid;
  grid-template-columns: minmax(280px, 360px) minmax(0, 1fr);
  gap: clamp(1.25rem, 3vw, 2rem);
  align-items: start;
}

.service-side {
  display: flex;
  flex-direction: column;
  justify-content: flex-start;
  gap: 0.9rem;
  min-width: 0;
}

.service-side .section-header {
  margin-bottom: 0;
}

.service-side .section-desc {
  max-width: 23rem;
}

.service-layout .chat-mockup {
  width: 80%;
  min-width: 0;
  justify-self: center;
}

@media (max-width: 900px) {
  .service-layout {
    grid-template-columns: 1fr;
    gap: 1.75rem;
    align-items: start;
  }

  .service-side {
    justify-content: flex-start;
  }

  .service-layout .chat-mockup {
    width: 100%;
    justify-self: stretch;
  }
}

.chat-mockup {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 12px;
  overflow: hidden;
  box-shadow: var(--shadow);
}

.chat-header {
  display: flex;
  align-items: center;
  gap: 0.55rem;
  padding: 0.42rem 0.7rem;
  background: var(--surface2);
  border-bottom: 1px solid var(--border);
}

.chat-status {
  display: inline-block;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--green);
  box-shadow: 0 0 6px var(--green);
  flex-shrink: 0;
}

.chat-title {
  font-family: var(--font-mono);
  font-size: 0.66rem;
  color: var(--text-muted);
}

.chat-messages {
  padding: 0.6rem 0.72rem;
  display: flex;
  flex-direction: column;
  gap: 0.42rem;
}

.msg {
  display: flex;
  flex-direction: column;
}

.msg-user {
  align-items: flex-end;
}

.msg-agent {
  flex-direction: row;
  align-items: flex-start;
  gap: 0.38rem;
}

.msg-agent .msg-content {
  display: flex;
  flex-direction: column;
  gap: 0;
}

.msg-avatar {
  flex-shrink: 0;
  width: 24px;
  height: 24px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--accent), #c9461c);
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-display);
  font-size: 0.46rem;
  font-weight: 700;
  color: #fff;
  margin-top: 2px;
}

.msg-bubble {
  display: inline-block;
  padding: 0.34rem 0.56rem;
  border-radius: 10px;
  font-size: 0.72rem;
  line-height: 1.34;
  max-width: 420px;
}

.msg-user .msg-bubble {
  background: var(--accent);
  color: #fff;
  border-radius: 10px 10px 2px 10px;
}

.msg-agent .msg-bubble {
  background: var(--surface2);
  border: 1px solid var(--border);
  border-radius: 2px 10px 10px 10px;
}

.msg-bubble code {
  display: block;
  font-family: var(--font-mono);
  font-size: 0.6rem;
  line-height: 1.26;
  color: var(--accent2);
  overflow-wrap: anywhere;
}

.msg-time {
  display: none;
}

.chat-input-bar {
  padding: 0.34rem 0.7rem;
  border-top: 1px solid var(--border);
  background: var(--surface2);
}

.spec-sheet-preview {
  position: relative;
  display: flex;
  align-items: flex-start;
  justify-content: flex-start;
  min-width: 0;
  padding: 0;
  margin-top: 0;
}

.spec-sheet-preview::before {
  content: none;
}

.spec-sheet-preview::after {
  content: "";
  position: absolute;
  top: 0.8rem;
  left: 0.8rem;
  width: min(100%, 316px);
  height: 420px;
  background: #f2f2ef;
  border: 1px solid rgba(21, 19, 26, 0.08);
  border-radius: 2px;
  box-shadow: 0 12px 24px rgba(0, 0, 0, 0.12);
  transform: none;
  z-index: 1;
}

.spec-sheet-paper {
  position: relative;
  z-index: 2;
  width: min(100%, 316px);
  min-height: 420px;
  padding: 0.95rem 1.05rem 0.95rem;
  background: #fbfbfa;
  border: 1px solid rgba(21, 19, 26, 0.12);
  border-radius: 2px;
  color: #15131a;
  box-shadow: 0 18px 36px rgba(0, 0, 0, 0.18);
  transform: none;
  overflow: hidden;
  font-family: var(--font-body);
  display: flex;
  flex-direction: column;
}

.spec-sheet-paper::before {
  content: none;
}

.spec-sheet-register {
  width: min(100%, 244px);
  margin: 0.68rem auto 0;
}

.spec-sheet-register-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  border: 1px solid rgba(21, 19, 26, 0.2);
  color: rgba(21, 19, 26, 0.82);
}

.spec-sheet-register-label,
.spec-sheet-register-value {
  min-height: 16px;
  padding: 0.08rem 0.28rem;
  font-family: 'Noto Sans JP', sans-serif;
  font-size: 0.4rem;
  line-height: 1.3;
  font-weight: 400;
}

.spec-sheet-register-label {
  border-right: 1px solid rgba(21, 19, 26, 0.2);
}

.spec-sheet-title-block {
  margin-top: 6.4rem;
  text-align: center;
}

.spec-sheet-org {
  font-family: 'Noto Sans JP', sans-serif;
  font-size: 0.8rem;
  font-weight: 700;
  letter-spacing: 0;
}

.spec-sheet-title {
  margin-top: 0.75rem;
  font-family: 'Noto Sans JP', sans-serif;
  font-size: 1.12rem;
  font-weight: 700;
  letter-spacing: 0.04em;
  line-height: 1.35;
}

.spec-sheet-project {
  margin-top: 0.72rem;
  font-size: 0.5rem;
  line-height: 1.65;
  color: rgba(21, 19, 26, 0.72);
}

.spec-sheet-edition {
  margin-top: 0.82rem;
  font-size: 0.44rem;
  line-height: 1.4;
  color: rgba(21, 19, 26, 0.56);
}

.spec-sheet-date {
  margin-top: 0.18rem;
  font-family: 'Noto Sans JP', sans-serif;
  font-size: 0.42rem;
  line-height: 1.4;
  color: rgba(21, 19, 26, 0.56);
}

@media (max-width: 900px) {
  .service-section {
    padding: 5rem 0 4.75rem;
  }

  .spec-sheet-preview {
    justify-content: center;
    padding-top: 0;
  }

  .spec-sheet-preview::after {
    top: 0.7rem;
    right: auto;
    left: 50%;
    transform: translateX(-48%);
  }

  .spec-sheet-paper {
    transform: none;
  }
}

@media (max-width: 560px) {
  .spec-sheet-preview::after {
    width: calc(100% - 18px);
    height: 410px;
  }

  .spec-sheet-paper {
    width: min(100%, 340px);
    min-height: 410px;
    padding: 0.9rem 0.95rem 0.9rem;
  }

  .spec-sheet-register {
    width: min(100%, 244px);
    margin-top: 0.68rem;
  }

  .spec-sheet-title-block {
    margin-top: 5.6rem;
  }
}

.chat-placeholder {
  font-size: 0.7rem;
  color: var(--text-muted);
}

/* ===================================================================
   02 — FLOW / PROCESS
   =================================================================== */
.flow-section {
  background: var(--bg);
}

.flow-steps {
  display: flex;
  align-items: stretch;
  gap: 0;
  overflow-x: auto;
  padding-bottom: 0.5rem;
  -ms-overflow-style: none;
  scrollbar-width: none;
}

.flow-steps::-webkit-scrollbar {
  display: none;
}

.flow-step {
  flex: 1;
  min-width: 190px;
  padding: 2rem 1.5rem;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  transition: border-color 0.2s, transform 0.2s;
}

.flow-step:hover {
  border-color: var(--border-accent);
  transform: translateY(-4px);
}

.flow-step-num {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  color: var(--accent);
  letter-spacing: 0.12em;
  margin-bottom: 1rem;
}

.flow-step-icon {
  width: 38px;
  height: 38px;
  color: var(--accent);
  margin-bottom: 1rem;
}

.flow-step-icon svg {
  width: 100%;
  height: 100%;
  display: block;
}

.flow-step-title {
  font-family: var(--font-display);
  font-size: 1rem;
  font-weight: 600;
  margin-bottom: 0.5rem;
}

.flow-step-desc {
  font-size: 0.825rem;
  color: var(--text-muted);
  line-height: 1.65;
}

.flow-arrow {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 44px;
  flex-shrink: 0;
  font-size: 1.2rem;
  color: var(--accent);
  opacity: 0.45;
  align-self: center;
}

/* ===================================================================
   03 — WORKS
   =================================================================== */
.works-section {
  background: var(--bg2);
}

.work-item {
  padding-bottom: 4.5rem;
  margin-bottom: 4.5rem;
  border-bottom: 1px solid var(--border);
}

.work-item:last-child {
  padding-bottom: 0;
  margin-bottom: 0;
  border-bottom: none;
}

.work-meta {
  display: flex;
  align-items: center;
  gap: 1rem;
  margin-bottom: 1.75rem;
}

.work-tag {
  display: inline-block;
  padding: 0.25rem 0.7rem;
  background: rgba(255, 107, 53, 0.1);
  border: 1px solid rgba(255, 107, 53, 0.28);
  color: var(--accent);
  font-family: var(--font-mono);
  font-size: 0.7rem;
  border-radius: 4px;
}

.work-tag-web {
  background: rgba(0, 212, 255, 0.1);
  border-color: rgba(0, 212, 255, 0.28);
  color: var(--accent2);
}

.work-tag-win {
  background: rgba(167, 139, 250, 0.1);
  border-color: rgba(167, 139, 250, 0.28);
  color: var(--purple);
}

.work-tag-legacy {
  background: rgba(245, 158, 11, 0.1);
  border-color: rgba(245, 158, 11, 0.28);
  color: var(--amber);
}

.work-tag-sci {
  background: rgba(74, 222, 128, 0.1);
  border-color: rgba(74, 222, 128, 0.28);
  color: var(--green);
}

.work-year {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  color: var(--text-muted);
}

/* FallTimer — featured layout */
.work-featured .work-text {
  margin-bottom: 2.5rem;
}

.work-visuals-featured {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.5rem;
}

/* Other works — side-by-side */
.work-main {
  display: flex;
  gap: 4rem;
  align-items: flex-start;
}

.work-text {
  flex: 1;
  min-width: 0;
}

.work-title {
  font-family: var(--font-display);
  font-size: 2rem;
  font-weight: 700;
  letter-spacing: -0.025em;
  margin-bottom: 0.75rem;
}

.work-desc {
  font-size: 0.925rem;
  color: var(--text-muted);
  max-width: 500px;
  margin-bottom: 1.25rem;
  line-height: 1.8;
}

.work-stack {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.work-stack li {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--text-muted);
  background: var(--surface);
  border: 1px solid var(--border);
  padding: 0.18rem 0.6rem;
  border-radius: 4px;
}

.work-visual-side {
  flex-shrink: 0;
  min-width: 280px;
  max-width: 340px;
}

/* --- Visual card shell (shared) --- */
.work-visual-card {
  border-radius: var(--radius);
  overflow: hidden;
  border: 1px solid var(--border);
}

.visual-card-header {
  padding: 0.45rem 0.8rem;
  background: var(--surface2);
  border-bottom: 1px solid var(--border);
}

.header-label {
  font-family: var(--font-mono);
  font-size: 0.68rem;
}

.accent-cyan   { color: var(--accent2); }
.accent-orange { color: var(--accent); }
.accent-purple { color: var(--purple); }

.work-tag-tool {
  background: rgba(245, 158, 11, 0.1);
  border-color: rgba(245, 158, 11, 0.28);
  color: var(--amber);
}

/* --- Circuit Schematic --- */
.circuit-mockup {
  background: #030d16;
  border-color: rgba(0, 212, 255, 0.18);
}

.circuit-svg,
.circuit-img {
  display: block;
  width: 100%;
  height: auto;
  padding: 0.75rem;
}

/* --- Device Mockup --- */
.device-mockup {
  background: #050d08;
  border-color: rgba(45, 106, 79, 0.4);
}

.device-svg {
  display: block;
  width: 100%;
  height: auto;
  padding: 0.5rem;
}

/* --- Code Mockup --- */
.code-mockup {
  background: #0d1117;
  border-color: rgba(255, 255, 255, 0.08);
}

.code-placeholder {
  display: grid;
  place-items: center;
  gap: 0.45rem;
  min-height: 220px;
  margin: 0.9rem;
  border: 1px dashed rgba(255, 255, 255, 0.18);
  border-radius: calc(var(--radius) - 0.35rem);
  background:
    linear-gradient(135deg, rgba(255, 255, 255, 0.03), rgba(0, 212, 255, 0.08)),
    #0b1016;
  text-align: center;
}

.code-placeholder-label {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.35rem 0.7rem;
  border-radius: 999px;
  border: 1px solid rgba(0, 212, 255, 0.28);
  font-family: var(--font-mono);
  font-size: 0.68rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--accent2);
}

.code-placeholder-text {
  margin: 0;
  font-size: 0.88rem;
  color: var(--text-muted);
}

/* --- Blockchain Visual --- */
.blockchain-visual {
  display: flex;
  flex-direction: column;
  gap: 0.6rem;
}

.block {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 0.75rem 1rem;
}

.block-active {
  border-color: var(--accent2);
  background: rgba(0, 212, 255, 0.06);
}

.block-label {
  display: block;
  font-family: var(--font-mono);
  font-size: 0.65rem;
  color: var(--text-muted);
  margin-bottom: 0.2rem;
}

.block-hash {
  display: block;
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--accent2);
}

.block-detail {
  display: block;
  font-family: var(--font-mono);
  font-size: 0.65rem;
  color: var(--accent);
  margin-top: 0.2rem;
}

.chain-link {
  font-size: 1.2rem;
  color: var(--text-muted);
  opacity: 0.4;
  text-align: center;
  line-height: 1;
}

/* --- HW–SW Bridge --- */
.hw-sw-bridge {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  flex-wrap: wrap;
}

.hw-box,
.sw-box {
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 0.9rem 1.1rem;
  background: var(--surface);
  min-width: 120px;
}

.hw-box {
  border-color: rgba(167, 139, 250, 0.35);
  background: rgba(167, 139, 250, 0.05);
}

.sw-box {
  border-color: rgba(0, 212, 255, 0.35);
  background: rgba(0, 212, 255, 0.05);
}

.hw-box-label {
  font-family: var(--font-display);
  font-size: 0.82rem;
  font-weight: 600;
  color: var(--purple);
  margin-bottom: 0.2rem;
}

.sw-box-label {
  font-family: var(--font-display);
  font-size: 0.82rem;
  font-weight: 600;
  color: var(--accent2);
  margin-bottom: 0.2rem;
}

.hw-box-detail,
.sw-box-detail {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  color: var(--text-muted);
}

.bridge-line {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.2rem;
}

.bridge-proto {
  font-family: var(--font-mono);
  font-size: 0.62rem;
  color: var(--accent);
}

/* --- Legacy VB Migration Visual --- */
.legacy-migration-visual {
  border: 1px solid rgba(245, 158, 11, 0.18);
  border-radius: 12px;
  overflow: hidden;
  background:
    radial-gradient(circle at top left, rgba(245, 158, 11, 0.12), transparent 48%),
    linear-gradient(180deg, rgba(13, 17, 23, 0.98), rgba(7, 10, 18, 0.98));
  box-shadow: var(--shadow);
}

.legacy-visual-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.75rem;
  flex-wrap: wrap;
  padding: 0.75rem 0.95rem;
  background: rgba(255, 255, 255, 0.03);
  border-bottom: 1px solid rgba(255, 255, 255, 0.06);
}

.legacy-status {
  display: inline-flex;
  align-items: center;
  padding: 0.3rem 0.55rem;
  border-radius: 999px;
  border: 1px solid currentColor;
  font-family: var(--font-mono);
  font-size: 0.62rem;
  letter-spacing: 0.08em;
}

.legacy-status-old {
  color: var(--amber);
  background: rgba(245, 158, 11, 0.08);
}

.legacy-status-new {
  color: var(--accent2);
  background: rgba(0, 212, 255, 0.08);
}

.legacy-transition {
  font-family: var(--font-mono);
  font-size: 0.85rem;
  color: rgba(232, 224, 208, 0.5);
}

.legacy-panels {
  display: grid;
  gap: 0.8rem;
  padding: 0.95rem;
}

.legacy-panel {
  padding: 0.9rem 0.95rem;
  border-radius: 10px;
  border: 1px solid var(--border);
  background: linear-gradient(135deg, rgba(255, 255, 255, 0.03), rgba(255, 255, 255, 0.01));
}

.legacy-panel-label {
  display: block;
  margin-bottom: 0.45rem;
  font-family: var(--font-mono);
  font-size: 0.63rem;
  letter-spacing: 0.08em;
  color: var(--text-muted);
}

.legacy-panel-title {
  font-family: var(--font-display);
  font-size: 0.92rem;
  font-weight: 600;
  color: var(--text);
  margin-bottom: 0.35rem;
}

.legacy-panel-text {
  font-size: 0.8rem;
  line-height: 1.7;
  color: var(--text-muted);
}

/* --- MATLAB Visual --- */
.matlab-visual {
  background: #0a0f0a;
  border: 1px solid rgba(74, 222, 128, 0.18);
  border-radius: var(--radius);
  overflow: hidden;
}

.matlab-header {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.45rem 0.8rem;
  background: rgba(74, 222, 128, 0.07);
  border-bottom: 1px solid rgba(74, 222, 128, 0.1);
}

.matlab-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--green);
  box-shadow: 0 0 5px var(--green);
  flex-shrink: 0;
}

.matlab-title {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  color: var(--green);
}

.matlab-code {
  display: block;
  padding: 0.75rem 1rem;
  font-family: var(--font-mono);
  font-size: 0.73rem;
  line-height: 1.75;
  border-bottom: 1px solid rgba(74, 222, 128, 0.08);
  white-space: pre;
  overflow-x: auto;
}

.m-kw { color: #64748b; }
.m-cm { color: #3a5a3a; }
.m-fn { color: var(--green); }
.m-str { color: var(--amber); }

.matlab-graph {
  padding: 0.75rem 1rem;
  background: #060b06;
  margin: 0;
}

.matlab-graph svg {
  display: block;
  width: 100%;
  height: auto;
}

/* ===================================================================
   04 - IN DEVELOPMENT
   =================================================================== */
.product-section {
  background:
    radial-gradient(circle at top right, rgba(0, 212, 255, 0.08), transparent 32%),
    linear-gradient(180deg, var(--bg3) 0%, var(--bg) 100%);
}

.product-card {
  display: grid;
  grid-template-columns: minmax(0, 1.1fr) minmax(320px, 420px);
  gap: 2rem;
  align-items: center;
  padding: 2rem;
  border: 1px solid var(--border);
  border-radius: 16px;
  background:
    linear-gradient(135deg, rgba(255, 255, 255, 0.02), rgba(0, 212, 255, 0.03)),
    rgba(10, 12, 22, 0.92);
  box-shadow: var(--shadow);
}

.product-copy {
  min-width: 0;
}

.product-note {
  max-width: 540px;
  margin-bottom: 1.25rem;
  padding-left: 0.9rem;
  border-left: 2px solid rgba(0, 212, 255, 0.35);
  color: var(--text-muted);
  font-size: 0.88rem;
  line-height: 1.8;
}

.product-visual-card {
  border-radius: 12px;
  overflow: hidden;
  border: 1px solid rgba(0, 212, 255, 0.18);
  background: #08111b;
}

.serial-bridge-visual {
  padding: 1rem;
  background:
    radial-gradient(circle at center, rgba(255, 107, 53, 0.08), transparent 40%),
    linear-gradient(180deg, rgba(8, 17, 27, 0.98), rgba(5, 10, 18, 0.98));
}

.serial-bridge-visual svg {
  display: block;
  width: 100%;
  height: auto;
}

.serial-bridge-caption {
  display: flex;
  justify-content: space-between;
  gap: 0.75rem;
  padding: 0.2rem 0.25rem 0.1rem;
  font-family: var(--font-mono);
  font-size: 0.62rem;
  color: var(--text-muted);
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

/* ===================================================================
   05 - CONTACT
   =================================================================== */
.contact-section {
  background: var(--bg);
}

.contact-inner {
  text-align: center;
  max-width: 520px;
  margin: 0 auto;
}

.contact-inner .section-label {
  display: block;
}

.contact-desc {
  color: var(--text-muted);
  font-size: 0.95rem;
  line-height: 1.85;
  margin-bottom: 2.25rem;
}

/* ===================================================================
   FOOTER
   =================================================================== */
.footer {
  border-top: 1px solid var(--border);
  padding: 2rem 0;
  background: var(--bg);
}

.footer-inner {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 1rem;
  flex-wrap: wrap;
}

.footer-logo {
  font-family: var(--font-display);
  font-size: 0.875rem;
  font-weight: 700;
  color: var(--text-muted);
}

.footer-copy {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  color: var(--text-muted);
}

/* ===================================================================
   ANIMATIONS
   =================================================================== */
@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(18px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* ===================================================================
   RESPONSIVE
   =================================================================== */
@media (max-width: 900px) {
  .work-visuals-featured {
    grid-template-columns: 1fr 1fr;
  }

  .work-main {
    flex-direction: column;
    gap: 2rem;
  }

  .work-visual-side {
    min-width: 0;
    max-width: 100%;
    width: 100%;
  }

  .hero-visual {
    opacity: 0.25;
  }
}

@media (max-width: 680px) {
  .hero-visual {
    display: none;
  }

  .product-card {
    grid-template-columns: 1fr;
  }

  .nav-links {
    display: none;
  }

  .section {
    padding: 5rem 0;
  }

  .flow-steps {
    flex-direction: column;
    overflow-x: visible;
  }

  .flow-arrow {
    transform: rotate(90deg);
    width: auto;
    align-self: flex-start;
    margin-left: 1.5rem;
  }

  .work-visuals-featured {
    grid-template-columns: 1fr;
  }

  .hw-sw-bridge {
    flex-direction: column;
    align-items: stretch;
  }

  .bridge-line {
    transform: rotate(90deg);
    align-self: flex-start;
    margin-left: 1rem;
  }

  .product-card {
    padding: 1.25rem;
  }

  .serial-bridge-caption {
    flex-direction: column;
    gap: 0.35rem;
  }
}