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

:root {
  --bg:       #06080d;
  --bg-card:  #0d1117;
  --bg-code:  #161b22;
  --border:   #21262d;
  --text:     #e6edf3;
  --text-dim: #8b949e;
  --accent:   #00d4aa;
  --accent2:  #00b4d8;
  --danger:   #f85149;
  --radius:   12px;
  --max-w:    1120px;
}

html {
  scroll-behavior: smooth;
  color-scheme: dark;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Helvetica, Arial, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

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

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

/* ── Nav ── */
nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  background: rgba(6, 8, 13, 0.85);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
}

nav .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 56px;
}

nav .logo {
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--text);
  letter-spacing: -0.02em;
}

nav .logo span { color: var(--accent); }

nav .nav-links {
  display: flex;
  gap: 24px;
  list-style: none;
}

nav .nav-links a {
  color: var(--text-dim);
  font-size: 0.875rem;
  transition: color 0.2s;
}

nav .nav-links a:hover {
  color: var(--text);
  text-decoration: none;
}

.nav-toggle {
  display: none;
  background: none;
  border: none;
  color: var(--text);
  font-size: 1.5rem;
  cursor: pointer;
}

/* ── Hero ── */
.hero {
  padding: 100px 0 40px;
  text-align: center;
}

.hero-badge {
  display: inline-block;
  padding: 6px 16px;
  background: rgba(0, 212, 170, 0.1);
  border: 1px solid rgba(0, 212, 170, 0.25);
  border-radius: 100px;
  font-size: 0.8rem;
  color: var(--accent);
  margin-bottom: 24px;
  letter-spacing: 0.03em;
}

.hero h1 {
  font-size: clamp(2.5rem, 6vw, 4rem);
  font-weight: 800;
  letter-spacing: -0.03em;
  line-height: 1.1;
  margin-bottom: 16px;
}

.hero h1 .accent { color: var(--accent); }

.hero .subtitle {
  font-size: clamp(1.1rem, 2.5vw, 1.35rem);
  color: var(--text-dim);
  max-width: 600px;
  margin: 0 auto 12px;
  line-height: 1.5;
}

.hero .differentiator {
  font-size: 1rem;
  color: var(--accent);
  font-weight: 500;
  margin-bottom: 32px;
}

.hero-install {
  display: inline-flex;
  align-items: center;
  gap: 14px;
  background: rgba(22, 27, 34, 0.85);
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: 12px;
  padding: 12px 8px 12px 18px;
  margin: 0 auto 14px;
  max-width: min(100%, 760px);
  font-family: ui-monospace, "SFMono-Regular", Menlo, Consolas, monospace;
  font-size: 0.9rem;
  text-align: left;
  box-shadow:
    inset 0 1px 0 rgba(255, 255, 255, 0.04),
    0 12px 32px rgba(0, 0, 0, 0.35),
    0 0 0 1px rgba(0, 0, 0, 0.4);
  transition: border-color 0.18s ease, box-shadow 0.18s ease;
}

.hero-install:hover,
.hero-install:focus-within {
  border-color: rgba(0, 212, 170, 0.35);
  box-shadow:
    inset 0 1px 0 rgba(255, 255, 255, 0.05),
    0 12px 32px rgba(0, 0, 0, 0.4),
    0 0 0 1px rgba(0, 212, 170, 0.15);
}

.hero-install-prompt {
  flex: 0 0 auto;
  color: var(--accent);
  font-weight: 600;
  user-select: none;
  line-height: 1;
}

.hero-install-cmd {
  flex: 1 1 auto;
  min-width: 0;
  overflow-x: auto;
  white-space: nowrap;
  color: var(--text);
  background: transparent;
  padding-right: 4px;
  scrollbar-width: thin;
  scrollbar-color: rgba(255, 255, 255, 0.15) transparent;
}

.hero-install-cmd::-webkit-scrollbar { height: 4px; }
.hero-install-cmd::-webkit-scrollbar-thumb {
  background: rgba(255, 255, 255, 0.15);
  border-radius: 2px;
}
.hero-install-cmd::-webkit-scrollbar-track { background: transparent; }

.hero-install-copy {
  flex: 0 0 auto;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: rgba(255, 255, 255, 0.06);
  color: var(--text-dim);
  border: 1px solid transparent;
  border-radius: 8px;
  padding: 6px 12px;
  font-family: inherit;
  font-size: 0.8rem;
  font-weight: 500;
  cursor: pointer;
  transition: background 0.15s ease, color 0.15s ease, border-color 0.15s ease;
}

.hero-install-copy:hover {
  background: rgba(255, 255, 255, 0.1);
  color: var(--text);
}

.hero-install-copy:active {
  background: rgba(255, 255, 255, 0.14);
}

.hero-install-copy.copied {
  background: rgba(0, 212, 170, 0.12);
  color: var(--accent);
  border-color: rgba(0, 212, 170, 0.3);
}

.hero-install-copy-icon {
  display: inline-block;
  flex: 0 0 auto;
}

.hero-install-note {
  font-size: 0.85rem;
  color: var(--text-dim);
  margin: 0 auto 28px;
  max-width: 600px;
  line-height: 1.45;
}

@media (max-width: 600px) {
  .hero-install {
    font-size: 0.78rem;
    padding-left: 14px;
    gap: 10px;
  }
  .hero-install-copy-label { display: none; }
  .hero-install-copy { padding: 6px 9px; }
}

.hero-buttons {
  display: flex;
  gap: 16px;
  justify-content: center;
  align-items: center;
  flex-wrap: wrap;
  margin-bottom: 24px;
}

.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 12px 28px;
  border-radius: 8px;
  font-size: 0.95rem;
  font-weight: 600;
  border: none;
  cursor: pointer;
  transition: all 0.2s;
}

.btn-primary {
  background: var(--accent);
  color: #06080d;
}

.btn-primary:hover {
  background: #00e6b8;
  text-decoration: none;
  transform: translateY(-1px);
}

.btn-secondary {
  background: transparent;
  color: var(--text);
  border: 1px solid var(--border);
}

.btn-secondary:hover {
  border-color: var(--text-dim);
  text-decoration: none;
  transform: translateY(-1px);
}

.github-stars {
  margin-top: 8px;
}

/* ── Sections ── */
section {
  padding: 64px 0;
}

.section-label {
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--accent);
  font-weight: 600;
  margin-bottom: 12px;
}

.section-title {
  font-size: clamp(1.75rem, 4vw, 2.5rem);
  font-weight: 700;
  letter-spacing: -0.02em;
  margin-bottom: 16px;
}

.section-desc {
  color: var(--text-dim);
  max-width: 640px;
  font-size: 1.05rem;
  line-height: 1.7;
}

.section-header {
  text-align: center;
  margin-bottom: 56px;
}

.section-header .section-desc {
  margin: 0 auto;
}

/* ── Intro ── */
.intro {
  border-bottom: 1px solid var(--border);
}

.intro-content {
  display: flex;
  flex-direction: column;
  gap: 48px;
}

.intro-text .section-desc {
  margin-bottom: 24px;
}

.intro-highlights {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: 12px 32px;
  justify-content: center;
  margin-top: 48px;
}

.intro-highlights li {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  color: var(--text-dim);
  font-size: 0.95rem;
}

.intro-highlights .check {
  color: var(--accent);
  font-weight: bold;
  flex-shrink: 0;
  margin-top: 2px;
}

.intro-diagram {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 40px;
}

/* ── Architecture Diagram (CSS) ── */
.arch-flow {
  display: flex;
  flex-direction: row;
  gap: 12px;
  align-items: center;
  justify-content: center;
  flex-wrap: wrap;
}

.arch-node {
  background: var(--bg-code);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 12px 18px;
  text-align: center;
  min-width: 140px;
  flex-shrink: 0;
  transition: border-color 0.3s;
}

.arch-node:hover {
  border-color: var(--accent);
}

.arch-node .node-icon {
  font-size: 1.5rem;
  margin-bottom: 6px;
}

.arch-node .node-label {
  font-weight: 600;
  font-size: 0.9rem;
  margin-bottom: 4px;
}

.arch-node .node-detail {
  font-size: 0.75rem;
  color: var(--text-dim);
}

.arch-arrow {
  color: var(--accent);
  font-size: 1.2rem;
  opacity: 0.6;
}

.arch-target {
  border-color: var(--accent);
  background: rgba(0, 212, 170, 0.05);
}

/* ── How It Works ── */
.how-it-works {
  border-bottom: 1px solid var(--border);
}

.steps {
  display: grid;
  grid-template-columns: 1fr auto 1fr auto 1fr;
  gap: 0;
  align-items: flex-start;
}

.step {
  text-align: center;
  padding: 0 16px;
}

.step-icon {
  width: 80px;
  height: 80px;
  border-radius: 20px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 2rem;
  margin: 0 auto 20px;
  border: 1px solid var(--border);
  background: var(--bg-card);
  transition: all 0.3s;
}

.step:hover .step-icon {
  border-color: var(--accent);
  box-shadow: 0 0 24px rgba(0, 212, 170, 0.15);
}

.step-number {
  font-size: 0.75rem;
  color: var(--accent);
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  margin-bottom: 8px;
}

.step h3 {
  font-size: 1.15rem;
  margin-bottom: 8px;
}

.step p {
  font-size: 0.875rem;
  color: var(--text-dim);
  line-height: 1.6;
}

.step-arrow {
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--accent);
  font-size: 1.5rem;
  opacity: 0.5;
  padding-top: 28px;
}

/* ── Web UI Mockup ── */
.webui {
  border-bottom: 1px solid var(--border);
}

.browser-mockup {
  max-width: 840px;
  margin: 0 auto;
  border-radius: var(--radius);
  border: 1px solid var(--border);
  overflow: hidden;
  background: #1a1a2e;
}

.browser-bar {
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 10px 16px;
  background: var(--bg-code);
  border-bottom: 1px solid var(--border);
}

.browser-url {
  flex: 1;
  background: rgba(0,0,0,0.3);
  padding: 4px 12px;
  border-radius: 4px;
  font-size: 0.75rem;
  color: var(--text-dim);
  font-family: "SF Mono", "Fira Code", Menlo, Consolas, monospace;
}

.browser-body {
  padding: 16px;
  font-size: 0.8rem;
}

.mock-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 12px;
}

.mock-title {
  font-weight: 700;
  font-size: 1rem;
  color: #e0e0e0;
}

.mock-status-badge {
  font-size: 0.7rem;
  color: #2ecc71;
  background: rgba(46, 204, 113, 0.1);
  padding: 3px 10px;
  border-radius: 100px;
}

.mock-tabs {
  display: flex;
  gap: 2px;
  margin-bottom: 14px;
  border-bottom: 1px solid #2a2a4a;
  padding-bottom: 0;
}

.mock-tab {
  padding: 6px 14px;
  font-size: 0.75rem;
  color: #888;
  border-bottom: 2px solid transparent;
  cursor: default;
}

.mock-tab.active {
  color: #e94560;
  border-bottom-color: #e94560;
}

.mock-connections {
  display: flex;
  flex-direction: column;
  gap: 6px;
  margin-bottom: 12px;
}

.mock-conn-row {
  display: flex;
  align-items: center;
  gap: 8px;
  background: #16213e;
  padding: 6px 12px;
  border-radius: 4px;
  font-size: 0.72rem;
}

.mock-conn-label {
  color: #888;
  min-width: 110px;
}

.mock-conn-select {
  background: #0f3460;
  padding: 2px 8px;
  border-radius: 3px;
  color: #e0e0e0;
  font-size: 0.7rem;
}

.mock-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  flex-shrink: 0;
}

.mock-dot.green { background: #2ecc71; }

.mock-conn-device {
  color: #2ecc71;
  font-size: 0.68rem;
}

.mock-task-bar {
  display: flex;
  gap: 8px;
  margin-bottom: 14px;
}

.mock-input {
  flex: 1;
  background: #0f3460;
  padding: 8px 12px;
  border-radius: 4px;
  color: #e0e0e0;
  font-size: 0.75rem;
  border: 1px solid #2a2a4a;
}

.mock-start-btn {
  background: #e94560;
  color: #fff;
  padding: 8px 20px;
  border-radius: 4px;
  font-size: 0.75rem;
  font-weight: 600;
  cursor: default;
}

.mock-main {
  display: grid;
  grid-template-columns: 1.5fr 1fr;
  gap: 12px;
  margin-bottom: 10px;
}

.mock-screenshot {
  aspect-ratio: 16 / 9;
  background: #0a0a14;
  border-radius: 4px;
  border: 1px solid #2a2a4a;
  display: flex;
  align-items: center;
  justify-content: center;
}

.mock-screen-placeholder {
  text-align: center;
  color: #555;
  font-size: 0.75rem;
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.mock-screen-res {
  font-size: 0.65rem;
  color: #444;
}

.mock-steps {
  background: #16213e;
  border-radius: 4px;
  border: 1px solid #2a2a4a;
  overflow: hidden;
}

.mock-step-header {
  padding: 6px 10px;
  font-size: 0.7rem;
  font-weight: 600;
  color: #888;
  border-bottom: 1px solid #2a2a4a;
  background: rgba(0,0,0,0.2);
}

.mock-step {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 5px 10px;
  font-size: 0.7rem;
  color: #aaa;
  border-bottom: 1px solid rgba(42, 42, 74, 0.5);
  font-family: "SF Mono", "Fira Code", Menlo, Consolas, monospace;
}

.mock-step.active {
  background: rgba(233, 69, 96, 0.08);
  border-left: 2px solid #e94560;
}

.mock-step-n {
  color: #e94560;
  font-weight: 600;
  min-width: 20px;
}

.mock-step-action {
  flex: 1;
  color: #ccc;
}

.mock-step-time {
  color: #666;
  font-size: 0.65rem;
}

.mock-stats {
  text-align: center;
  font-size: 0.68rem;
  color: #666;
  font-family: "SF Mono", "Fira Code", Menlo, Consolas, monospace;
}

@media (max-width: 640px) {
  .mock-main {
    grid-template-columns: 1fr;
  }
  .mock-conn-label {
    min-width: 80px;
  }
}

/* ── Features ── */
.features {
  border-bottom: 1px solid var(--border);
}

.feature-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}

.feature-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 28px;
  transition: border-color 0.3s;
}

.feature-card:hover {
  border-color: var(--accent);
}

.feature-icon {
  font-size: 1.5rem;
  margin-bottom: 16px;
}

.feature-card h3 {
  font-size: 1rem;
  margin-bottom: 8px;
}

.feature-card p {
  font-size: 0.875rem;
  color: var(--text-dim);
  line-height: 1.6;
}

/* ── Use Cases ── */
.use-cases {
  border-bottom: 1px solid var(--border);
}

.usecase-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  margin-bottom: 40px;
}

.usecase-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 32px;
  position: relative;
  overflow: hidden;
  transition: border-color 0.3s;
}

.usecase-card:hover {
  border-color: var(--accent);
}

.usecase-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--accent), var(--accent2));
}

.usecase-number {
  font-size: 0.75rem;
  color: var(--accent);
  font-weight: 700;
  letter-spacing: 0.08em;
  margin-bottom: 12px;
}

.usecase-card h3 {
  font-size: 1.15rem;
  margin-bottom: 10px;
}

.usecase-card p {
  font-size: 0.875rem;
  color: var(--text-dim);
  line-height: 1.7;
}

.usecase-tag {
  display: inline-block;
  margin-top: 16px;
  padding: 4px 12px;
  background: rgba(0, 212, 170, 0.08);
  border: 1px solid rgba(0, 212, 170, 0.2);
  border-radius: 100px;
  font-size: 0.75rem;
  color: var(--accent);
}

.also-great {
  text-align: center;
  padding: 24px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
}

.also-great h4 {
  font-size: 0.9rem;
  color: var(--text-dim);
  margin-bottom: 12px;
}

.also-tags {
  display: flex;
  gap: 10px;
  justify-content: center;
  flex-wrap: wrap;
}

.also-tags span {
  padding: 6px 14px;
  background: var(--bg-code);
  border: 1px solid var(--border);
  border-radius: 100px;
  font-size: 0.8rem;
  color: var(--text-dim);
}

/* ── Hardware ── */
.hardware {
  border-bottom: 1px solid var(--border);
}

.hardware-table-wrap {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  max-width: 820px;
  margin: 0 auto;
}

.hw-required {
  color: var(--accent);
  font-weight: 600;
  font-size: 0.8rem;
}

.hw-optional {
  color: var(--text-dim);
  font-weight: 600;
  font-size: 0.8rem;
}

.hw-recommended {
  color: var(--accent2);
  font-weight: 600;
  font-size: 0.8rem;
}

.hardware-table {
  width: 100%;
  border-collapse: collapse;
}

.hardware-table th,
.hardware-table td {
  padding: 14px 24px;
  text-align: left;
  font-size: 0.9rem;
  border-bottom: 1px solid var(--border);
}

.hardware-table th {
  background: var(--bg-code);
  font-weight: 600;
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--text-dim);
}

.hardware-table tr:last-child td {
  border-bottom: none;
}

.hardware-table .item-icon {
  margin-right: 8px;
}

.hardware-table .hw-photo {
  width: 100px;
  padding: 8px 0 8px 16px;
}

.hardware-table .hw-photo img {
  display: block;
  width: 100px;
  height: auto;
  border-radius: 6px;
  transition: transform 0.15s ease;
}

.hardware-table .hw-photo a:hover img {
  transform: scale(1.05);
}

.hardware-total {
  background: var(--bg-code);
}

.hardware-total td {
  font-weight: 700;
  color: var(--accent);
  border-bottom: none !important;
}

/* ── Quick Start ── */
.quickstart {
  border-bottom: 1px solid var(--border);
}

.code-block {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  max-width: 720px;
  margin: 0 auto;
}

.code-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 12px 20px;
  background: var(--bg-code);
  border-bottom: 1px solid var(--border);
}

.code-dots {
  display: flex;
  gap: 6px;
}

.code-dots span {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--border);
}

.code-dots span:first-child { background: var(--danger); }
.code-dots span:nth-child(2) { background: #e3b341; }
.code-dots span:nth-child(3) { background: var(--accent); }

.copy-btn {
  background: none;
  border: 1px solid var(--border);
  color: var(--text-dim);
  padding: 4px 12px;
  border-radius: 6px;
  font-size: 0.75rem;
  cursor: pointer;
  transition: all 0.2s;
}

.copy-btn:hover {
  border-color: var(--text-dim);
  color: var(--text);
}

.code-body {
  padding: 20px 24px;
  overflow-x: auto;
}

.code-body pre {
  font-family: "SF Mono", "Fira Code", "Fira Mono", Menlo, Consolas, monospace;
  font-size: 0.85rem;
  line-height: 1.8;
  color: var(--text-dim);
}

.code-body .comment { color: #484f58; }
.code-body .command { color: var(--text); }
.code-body .string  { color: #a5d6ff; }
.code-body .flag    { color: #d2a8ff; }

/* ── Disclaimer ── */
.disclaimer {
  padding: 32px 0;
}

.disclaimer-box {
  max-width: 720px;
  margin: 0 auto;
  padding: 16px 24px;
  background: rgba(248, 81, 73, 0.05);
  border: 1px solid rgba(248, 81, 73, 0.2);
  border-radius: var(--radius);
  text-align: center;
}

.disclaimer-box p {
  font-size: 0.8rem;
  color: var(--text-dim);
  line-height: 1.7;
}

/* ── Footer ── */
footer {
  padding: 40px 0;
  text-align: center;
  border-top: 1px solid var(--border);
}

footer .footer-logo {
  font-size: 1rem;
  font-weight: 700;
  margin-bottom: 12px;
}

footer .footer-logo span { color: var(--accent); }

footer p {
  font-size: 0.8rem;
  color: var(--text-dim);
}

footer .footer-links {
  display: flex;
  gap: 24px;
  justify-content: center;
  margin-top: 12px;
}

footer .footer-links a {
  color: var(--text-dim);
  font-size: 0.8rem;
}

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

/* ── Responsive ── */
@media (max-width: 900px) {
  .feature-grid,
  .usecase-grid {
    grid-template-columns: 1fr;
  }

  .arch-flow {
    flex-direction: column;
  }

  .arch-arrow {
    transform: rotate(90deg);
  }

  .steps {
    grid-template-columns: 1fr;
    gap: 16px;
    max-width: 320px;
    margin: 0 auto;
  }

  .step-arrow {
    transform: rotate(90deg);
    padding: 0;
  }
}

@media (max-width: 640px) {
  .hero { padding: 80px 0 32px; }

  nav .nav-links { display: none; }
  nav .nav-links.open {
    display: flex;
    flex-direction: column;
    position: absolute;
    top: 56px;
    left: 0;
    right: 0;
    background: rgba(6, 8, 13, 0.95);
    backdrop-filter: blur(12px);
    padding: 16px 24px;
    gap: 16px;
    border-bottom: 1px solid var(--border);
  }

  .nav-toggle { display: block; }

  section { padding: 56px 0; }

  .also-tags {
    gap: 8px;
  }

  .hardware-table th,
  .hardware-table td {
    padding: 12px 16px;
  }

  .hardware-table .hw-photo {
    width: 64px;
    padding: 8px 0 8px 12px;
  }

  .hardware-table .hw-photo img {
    width: 64px;
  }
}