/* ===========================
   Variables & Reset
   =========================== */
:root {
  --bg-base:      #06090f;
  --bg-surface:   #0b1220;
  --bg-raised:    #0f1929;
  --bg-hover:     #14223a;
  --border:       rgba(148, 163, 184, 0.07);
  --border-light: rgba(148, 163, 184, 0.14);
  --text-1:       #e2e8f0;
  --text-2:       #94a3b8;
  --text-3:       #475569;
  --green:        #10b981;
  --red:          #ef4444;
  --radius:       12px;
  --radius-lg:    20px;
  --transition:   0.2s ease;
  --shadow:       0 4px 20px rgba(0,0,0,0.4);
  --shadow-lg:    0 8px 40px rgba(0,0,0,0.6);
}

*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
  scroll-padding-top: 64px;
}

body {
  font-family: 'Inter', sans-serif;
  font-size: 16px;
  line-height: 1.6;
  color: var(--text-2);
  background: var(--bg-base);
}

a { color: inherit; text-decoration: none; }
img { max-width: 100%; display: block; }
ul { list-style: none; }

/* ===========================
   Layout
   =========================== */
.container {
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 24px;
}

section { padding: 90px 0; background: var(--bg-base); }

.section-dark {
  background: var(--bg-surface);
  color: var(--text-1);
}

.section-dark .section-sub { color: var(--text-3); }

.section-title {
  font-size: clamp(28px, 4vw, 40px);
  font-weight: 700;
  text-align: center;
  margin-bottom: 12px;
  letter-spacing: -0.5px;
  color: var(--text-1);
}

.section-sub {
  text-align: center;
  color: var(--text-3);
  font-size: 18px;
  margin-bottom: 56px;
}

.subsection-title {
  font-size: 22px;
  font-weight: 600;
  margin: 56px 0 20px;
  color: var(--text-1);
}

/* ===========================
   Navigation
   =========================== */
#navbar {
  position: sticky;
  top: 0;
  z-index: 1000;
  background: rgba(11, 18, 32, 0.95);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border-light);
}

.nav-container {
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 24px;
  height: 64px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}

.nav-brand {
  display: flex;
  align-items: center;
  gap: 8px;
  font-weight: 700;
  font-size: 18px;
  color: #ffffff;
  flex-shrink: 0;
}

.nav-logo { font-size: 22px; }

.nav-links {
  display: flex;
  gap: 4px;
  align-items: center;
}

.nav-links a {
  padding: 6px 14px;
  border-radius: 8px;
  font-size: 14px;
  font-weight: 500;
  color: var(--text-3);
  transition: all var(--transition);
}

.nav-links a:hover,
.nav-links a.active {
  color: var(--text-1);
  background: var(--bg-hover);
}

.nav-github {
  display: inline-flex !important;
  align-items: center;
  gap: 6px;
  margin-left: 4px;
  border: 1px solid rgba(255,255,255,0.2);
  border-radius: 8px;
}

.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 4px;
}

.nav-toggle span {
  display: block;
  width: 24px;
  height: 2px;
  background: white;
  border-radius: 2px;
  transition: var(--transition);
}

/* ===========================
   Hero
   =========================== */
#hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 100px 24px;
  text-align: center;
  overflow: hidden;
  background: var(--bg-base);
}

.hero-bg {
  position: absolute;
  inset: 0;
  background:
    radial-gradient(ellipse at 25% 50%, rgba(16,185,129,0.12) 0%, transparent 55%),
    radial-gradient(ellipse at 75% 25%, rgba(16,185,129,0.06) 0%, transparent 50%),
    linear-gradient(135deg, var(--bg-base) 0%, var(--bg-surface) 100%);
}

.hero-bg::after {
  content: '';
  position: absolute;
  inset: 0;
  background-image: radial-gradient(circle, rgba(255,255,255,0.025) 1px, transparent 1px);
  background-size: 32px 32px;
}

.hero-content {
  position: relative;
  z-index: 1;
  max-width: 780px;
}

.hero-badge {
  display: inline-block;
  padding: 5px 16px;
  background: rgba(16,185,129,0.08);
  border: 1px solid rgba(16,185,129,0.35);
  border-radius: 100px;
  font-size: 12px;
  font-weight: 600;
  color: var(--green);
  margin-bottom: 24px;
  letter-spacing: 1px;
  text-transform: uppercase;
}

#hero h1 {
  font-size: clamp(52px, 9vw, 96px);
  font-weight: 700;
  color: var(--text-1);
  letter-spacing: -3px;
  line-height: 1;
  margin-bottom: 20px;
}

.hero-tagline {
  font-size: clamp(17px, 2.5vw, 22px);
  color: var(--green);
  font-weight: 500;
  margin-bottom: 16px;
}

.hero-desc {
  font-size: 17px;
  color: var(--text-2);
  max-width: 560px;
  margin: 0 auto 40px;
  line-height: 1.75;
}

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

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 14px 28px;
  border-radius: 10px;
  font-weight: 600;
  font-size: 15px;
  transition: all var(--transition);
  border: 2px solid transparent;
}

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

.btn-primary:hover {
  background: var(--green);
  border-color: var(--green);
  transform: translateY(-2px);
  box-shadow: 0 8px 20px rgba(16,185,129,0.35);
}

.btn-secondary {
  background: transparent;
  color: #fff;
  border-color: rgba(255,255,255,0.28);
}

.btn-secondary:hover {
  border-color: rgba(255,255,255,0.6);
  background: rgba(255,255,255,0.07);
}

.btn-github {
  background: transparent;
  color: #fff;
  border-color: rgba(255,255,255,0.28);
  gap: 8px;
}
.btn-github:hover {
  border-color: rgba(255,255,255,0.6);
  background: rgba(255,255,255,0.07);
}

.hero-scroll {
  position: absolute;
  bottom: 32px;
  left: 50%;
  transform: translateX(-50%);
  text-align: center;
  color: rgba(255,255,255,0.35);
  font-size: 11px;
  letter-spacing: 1.5px;
  text-transform: uppercase;
  z-index: 1;
}

.scroll-arrow {
  font-size: 20px;
  animation: bounce 2s infinite;
  margin-top: 6px;
}

@keyframes bounce {
  0%, 100% { transform: translateY(0); }
  50%       { transform: translateY(7px); }
}

/* ===========================
   Overview Features
   =========================== */
.feature-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 20px;
  margin-bottom: 60px;
}

.feature-card {
  background: var(--bg-surface);
  border: 1px solid var(--border-light);
  border-radius: var(--radius);
  padding: 28px;
  transition: all var(--transition);
  color: var(--text-2);
}

.feature-card:hover {
  transform: translateY(-3px);
  border-color: var(--green);
  box-shadow: 0 0 20px rgba(16,185,129,0.08);
}

.feature-icon {
  font-size: 36px;
  margin-bottom: 14px;
}

.feature-card h3 {
  font-size: 17px;
  font-weight: 600;
  margin-bottom: 8px;
  color: var(--text-1);
}

.feature-card p {
  font-size: 14px;
  color: var(--text-2);
  line-height: 1.65;
}

/* Pipeline diagram */
.pipeline {
  background: var(--bg-surface);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-lg);
  padding: 32px;
}

.pipeline h3 {
  font-size: 18px;
  font-weight: 600;
  margin-bottom: 24px;
  text-align: center;
  color: var(--text-1);
}

.pipeline-steps {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  flex-wrap: wrap;
}

.pipeline-step {
  text-align: center;
  min-width: 110px;
}

.pipeline-icon {
  font-size: 32px;
  margin-bottom: 8px;
}

.pipeline-label {
  font-size: 13px;
  font-weight: 500;
  color: var(--text-2);
  line-height: 1.4;
}

.pipeline-label small {
  display: block;
  color: var(--text-3);
  font-weight: 400;
  font-size: 12px;
}

.pipeline-arrow {
  font-size: 24px;
  color: var(--green);
  flex-shrink: 0;
}

/* ===========================
   Dashboard Section
   =========================== */
#dashboard {
  background: var(--bg-surface);
}

.video-wrapper {
  margin-bottom: 56px;
  border-radius: var(--radius-lg);
  overflow: hidden;
  border: 1px solid var(--border);
  box-shadow: var(--shadow-lg);
  background: #000;
}

.dashboard-video {
  width: 100%;
  height: auto;
  display: block;
}

.video-caption {
  background: var(--bg-raised);
  text-align: center;
  font-size: 13px;
  color: var(--text-3);
  padding: 10px 16px;
  border-top: 1px solid var(--border-light);
}

.features-grid {
  display: flex;
  flex-direction: column;
  gap: 28px;
}

.feature-detail {
  display: flex;
  gap: 24px;
  align-items: flex-start;
  background: var(--bg-raised);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-lg);
  padding: 28px;
  transition: box-shadow var(--transition);
}

.feature-detail:hover { box-shadow: var(--shadow); }

.feature-detail-icon {
  flex-shrink: 0;
  width: 52px;
  height: 52px;
  border-radius: 14px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 24px;
  border: 1px solid var(--border-light);
}

.feature-detail h3 {
  font-size: 18px;
  font-weight: 600;
  margin-bottom: 8px;
  color: var(--text-1);
}

.feature-detail p {
  font-size: 14px;
  color: var(--text-2);
  line-height: 1.7;
  margin-bottom: 0;
}

.feature-detail p + p { margin-top: 8px; }

.feature-detail code {
  background: var(--bg-hover);
  padding: 1px 5px;
  border-radius: 4px;
  font-family: 'JetBrains Mono', monospace;
  font-size: 13px;
  color: var(--green);
  border: none;
}

/* Egg demo widget */
.egg-demo {
  display: flex;
  gap: 20px;
  margin-top: 16px;
  flex-wrap: wrap;
}

.egg-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 5px;
  font-size: 13px;
}

.egg-icon {
  width: 52px;
  height: 52px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 26px;
}

.egg-state {
  font-size: 11px;
  color: var(--text-3);
}

/* Color legend chips */
.color-legend {
  display: flex;
  gap: 8px;
  margin-top: 14px;
  flex-wrap: wrap;
}

.legend-chip {
  padding: 4px 12px;
  border-radius: 100px;
  font-size: 13px;
  font-weight: 600;
  color: #fff;
}

@media (max-width: 600px) {
  .feature-detail {
    flex-direction: column;
    gap: 16px;
  }
  .egg-demo { gap: 12px; }
}

/* ===========================
   Gallery
   =========================== */
.gallery-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 10px;
  margin-bottom: 20px;
}

.gallery-item {
  position: relative;
  border-radius: var(--radius);
  overflow: hidden;
  cursor: pointer;
  aspect-ratio: 4/3;
  background: #111;
}

.gallery-item:first-child  { grid-column: span 2; }
.gallery-item:nth-child(4) { grid-column: span 2; }

.gallery-item img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.4s ease;
}

.gallery-item:hover img { transform: scale(1.05); }

.gallery-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(to top, rgba(0,0,0,0.72) 0%, transparent 55%);
  display: flex;
  align-items: flex-end;
  padding: 14px 16px;
  opacity: 0;
  transition: opacity var(--transition);
}

.gallery-item:hover .gallery-overlay { opacity: 1; }

.gallery-overlay span {
  color: white;
  font-size: 13px;
  font-weight: 500;
}

.gallery-note {
  text-align: center;
  color: rgba(240,244,240,0.45);
  font-size: 13px;
}

/* Lightbox */
.lightbox {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.92);
  z-index: 9999;
  align-items: center;
  justify-content: center;
}

.lightbox.open { display: flex; }

.lightbox img {
  max-width: 88vw;
  max-height: 85vh;
  border-radius: var(--radius);
  box-shadow: var(--shadow-lg);
}

.lightbox-close,
.lightbox-prev,
.lightbox-next {
  position: absolute;
  background: rgba(255,255,255,0.1);
  border: none;
  color: white;
  border-radius: 50%;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: background var(--transition);
  line-height: 1;
}

.lightbox-close {
  top: 20px;
  right: 24px;
  width: 40px;
  height: 40px;
  font-size: 18px;
}

.lightbox-prev,
.lightbox-next {
  top: 50%;
  transform: translateY(-50%);
  width: 52px;
  height: 52px;
  font-size: 30px;
}

.lightbox-prev { left: 20px; }
.lightbox-next { right: 20px; }

.lightbox-close:hover,
.lightbox-prev:hover,
.lightbox-next:hover { background: rgba(255,255,255,0.2); }

/* ===========================
   Training Steps
   =========================== */
.step {
  background: var(--bg-surface);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-lg);
  padding: 36px;
  margin-bottom: 20px;
}

.step-header {
  display: flex;
  align-items: flex-start;
  gap: 20px;
  margin-bottom: 24px;
}

.step-number {
  flex-shrink: 0;
  width: 52px;
  height: 52px;
  background: var(--green);
  color: white;
  border-radius: 14px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 15px;
  font-weight: 700;
  letter-spacing: 1px;
}

.step-header h3 {
  font-size: 20px;
  font-weight: 600;
  margin-bottom: 4px;
  color: var(--text-1);
}

.step-desc {
  color: var(--text-3);
  font-size: 14px;
}

.step-content > p {
  margin-bottom: 14px;
  color: var(--text-2);
  font-size: 15px;
}

.tip-list {
  display: flex;
  flex-direction: column;
  gap: 8px;
  margin-bottom: 16px;
}

.tip-list li {
  padding-left: 20px;
  position: relative;
  font-size: 14px;
  color: var(--text-2);
}

.tip-list li::before {
  content: '→';
  position: absolute;
  left: 0;
  color: var(--green);
}

.tip-list li strong { color: var(--text-1); }

.tip-list li a {
  color: var(--green);
  text-decoration: underline;
  text-underline-offset: 2px;
}

.tip-list li code,
.step-content code {
  background: var(--bg-raised);
  padding: 1px 5px;
  border-radius: 4px;
  font-family: 'JetBrains Mono', monospace;
  font-size: 13px;
  color: var(--green);
  border: 1px solid var(--border-light);
}

.info-box {
  background: rgba(16,185,129,0.06);
  border-left: 3px solid var(--green);
  border-radius: 0 8px 8px 0;
  padding: 14px 16px;
  font-size: 14px;
  color: var(--text-2);
  margin: 16px 0;
  line-height: 1.7;
}

.info-box code {
  background: var(--bg-raised);
  padding: 1px 5px;
  border-radius: 3px;
  font-family: 'JetBrains Mono', monospace;
  font-size: 13px;
  color: var(--green);
}

.info-box a {
  color: var(--green);
  text-decoration: underline;
  text-underline-offset: 2px;
}

.info-box ul {
  margin-top: 10px;
  display: flex;
  flex-direction: column;
  gap: 5px;
}

.info-box ul li {
  padding-left: 14px;
  position: relative;
}

.info-box ul li::before {
  content: '•';
  position: absolute;
  left: 0;
  color: var(--green);
}

/* ===========================
   Code Blocks
   =========================== */
.code-block-wrapper {
  border-radius: var(--radius);
  overflow: hidden;
  margin: 14px 0;
  border: 1px solid #30363d;
}

.code-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  background: #161b22;
  padding: 9px 16px;
  border-bottom: 1px solid #30363d;
}

.code-lang {
  font-size: 12px;
  font-family: 'JetBrains Mono', monospace;
  color: #8b949e;
}

.copy-btn {
  background: rgba(255,255,255,0.08);
  border: 1px solid rgba(255,255,255,0.14);
  color: #c9d1d9;
  padding: 3px 10px;
  border-radius: 6px;
  font-size: 12px;
  cursor: pointer;
  font-family: 'Inter', sans-serif;
  transition: all var(--transition);
}

.copy-btn:hover { background: rgba(255,255,255,0.15); }
.copy-btn.copied { color: var(--green); border-color: rgba(16,185,129,0.5); }

pre { margin: 0; overflow-x: auto; }

pre code.hljs {
  padding: 18px 20px;
  font-family: 'JetBrains Mono', monospace;
  font-size: 13px;
  line-height: 1.65;
}

/* ===========================
   Hosting Section
   =========================== */
.hosting-options {
  display: flex;
  gap: 10px;
  margin-bottom: 28px;
  flex-wrap: wrap;
}

.hosting-card {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 11px 20px;
  background: rgba(255,255,255,0.05);
  border: 1px solid var(--border-light);
  border-radius: var(--radius);
  color: rgba(255,255,255,0.65);
  cursor: pointer;
  transition: all var(--transition);
  font-size: 14px;
  font-weight: 500;
  user-select: none;
}

.hosting-card:hover { background: rgba(255,255,255,0.09); color: white; }
.hosting-card.active { background: var(--green); border-color: var(--green); color: white; }
.hosting-icon { font-size: 20px; }

.hosting-content {
  background: rgba(255,255,255,0.04);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-lg);
  padding: 32px;
  margin-bottom: 32px;
}

.hosting-content.hidden { display: none; }

.hosting-content h3 {
  font-size: 20px;
  font-weight: 600;
  margin-bottom: 12px;
  color: var(--text-1);
}

.hosting-content > p {
  color: var(--text-2);
  font-size: 15px;
  margin-bottom: 14px;
}

.hosting-content code {
  background: rgba(255,255,255,0.1);
  padding: 1px 5px;
  border-radius: 4px;
  font-family: 'JetBrains Mono', monospace;
  font-size: 13px;
  color: #a5d6a7;
}

/* API Table */
.api-table-wrapper {
  overflow-x: auto;
  border-radius: var(--radius);
  border: 1px solid var(--border-light);
  margin-bottom: 8px;
}

.api-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 14px;
}

.api-table th {
  background: rgba(255,255,255,0.05);
  padding: 12px 16px;
  text-align: left;
  font-weight: 600;
  color: rgba(240,244,240,0.55);
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.7px;
}

.api-table td {
  padding: 12px 16px;
  border-top: 1px solid var(--border-light);
  color: rgba(240,244,240,0.8);
}

.api-table code {
  background: rgba(255,255,255,0.07);
  padding: 2px 7px;
  border-radius: 4px;
  font-family: 'JetBrains Mono', monospace;
  font-size: 13px;
  color: #a5d6a7;
}

.method {
  display: inline-block;
  padding: 2px 8px;
  border-radius: 4px;
  font-size: 11px;
  font-weight: 700;
  font-family: 'JetBrains Mono', monospace;
  letter-spacing: 0.5px;
}

.method.get  { background: rgba(59,130,246,0.18); color: #60a5fa; }
.method.post { background: rgba(16,185,129,0.18); color: #34d399; }
.method.ws   { background: rgba(168,85,247,0.18); color: #c084fc; }

/* MQTT Topics */
.mqtt-topics {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.mqtt-topic {
  display: flex;
  align-items: center;
  gap: 16px;
  background: rgba(255,255,255,0.04);
  border: 1px solid var(--border-light);
  border-radius: var(--radius);
  padding: 12px 16px;
  flex-wrap: wrap;
}

.mqtt-topic code {
  font-family: 'JetBrains Mono', monospace;
  font-size: 13px;
  color: #a5d6a7;
  background: rgba(165,214,167,0.1);
  padding: 2px 8px;
  border-radius: 4px;
  white-space: nowrap;
}

.mqtt-topic span {
  font-size: 14px;
  color: rgba(240,244,240,0.55);
}

/* ===========================
   Tech Stack
   =========================== */
.tech-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 16px;
  margin-bottom: 48px;
}

.tech-item {
  background: var(--bg-surface);
  border: 1px solid var(--border-light);
  border-radius: var(--radius);
  padding: 24px;
  transition: box-shadow var(--transition);
  color: var(--text-2);
}

.tech-item:hover { box-shadow: var(--shadow); }

.tech-name {
  font-size: 17px;
  font-weight: 700;
  margin-bottom: 8px;
  color: var(--text-1);
}

.tech-desc {
  font-size: 14px;
  color: var(--text-2);
  line-height: 1.6;
  margin-bottom: 14px;
}

.tech-tag {
  display: inline-block;
  padding: 3px 10px;
  background: rgba(16,185,129,0.1);
  color: var(--green);
  border-radius: 100px;
  font-size: 12px;
  font-weight: 500;
}

/* Model comparison */
.model-comparison {
  background: var(--bg-surface);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-lg);
  padding: 32px;
}

.model-comparison h3 {
  font-size: 20px;
  font-weight: 600;
  margin-bottom: 8px;
  color: var(--text-1);
}

.model-comparison > p {
  color: var(--text-2);
  margin-bottom: 20px;
  font-size: 15px;
}

.table-scroll { overflow-x: auto; }

.model-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 14px;
}

.model-table th {
  background: var(--bg-raised);
  padding: 10px 14px;
  text-align: left;
  font-weight: 600;
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  color: var(--text-3);
}

.model-table td {
  padding: 12px 14px;
  border-top: 1px solid var(--border);
  color: var(--text-2);
}

.model-table code {
  background: var(--bg-raised);
  padding: 1px 5px;
  border-radius: 3px;
  font-family: 'JetBrains Mono', monospace;
  font-size: 12px;
  color: var(--green);
}

/* ===========================
   Footer
   =========================== */
footer {
  background: var(--bg-surface);
  color: var(--text-3);
  padding: 52px 0;
  border-top: 1px solid var(--border-light);
}

.footer-content { text-align: center; }

.footer-brand {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  font-size: 20px;
  color: var(--text-1);
  margin-bottom: 14px;
}

.footer-brand span { font-size: 26px; }

footer p {
  font-size: 14px;
  margin-bottom: 8px;
  color: var(--text-3);
}

.footer-note a {
  color: var(--text-3);
  text-decoration: underline;
  text-underline-offset: 3px;
  transition: color var(--transition);
}

.footer-note a:hover { color: var(--text-1); }

/* ===========================
   Detection card demo
   =========================== */
.card-demo {
  display: flex;
  flex-direction: column;
  gap: 8px;
  margin-top: 16px;
  max-width: 280px;
}
.card-demo-item {
  display: flex;
  align-items: center;
  gap: 11px;
  padding: 11px 12px;
  border-radius: 10px;
  background: var(--bg-surface);
  border: 1px solid var(--border);
  transition: border-color 0.25s;
}
.card-demo-item.active {
  border-color: color-mix(in srgb, var(--color) 35%, transparent);
  box-shadow: 0 0 18px color-mix(in srgb, var(--color) 8%, transparent);
}
.card-demo-indicator {
  display: flex; align-items: center; justify-content: center;
  width: 34px; height: 34px; border-radius: 50%;
  background: color-mix(in srgb, var(--color, #475569) 10%, transparent);
  flex-shrink: 0;
}
.card-demo-item.active .card-demo-indicator {
  background: color-mix(in srgb, var(--color) 18%, transparent);
}
.card-demo-dot {
  width: 11px; height: 11px; border-radius: 50%;
  background: var(--text-3);
  display: block;
}
.card-demo-dot.active {
  background: var(--color);
  box-shadow: 0 0 8px var(--color);
}
.card-demo-body { flex: 1; min-width: 0; }
.card-demo-name {
  display: block; font-size: 13px; font-weight: 600;
  color: var(--text-1); margin-bottom: 5px;
}
.card-demo-bar-row { display: flex; align-items: center; gap: 7px; }
.card-demo-bar {
  flex: 1; height: 3px; background: var(--border-light);
  border-radius: 2px; overflow: hidden;
}
.card-demo-fill {
  height: 100%; background: var(--color);
  box-shadow: 0 0 5px color-mix(in srgb, var(--color) 70%, transparent);
  border-radius: 2px;
}
.card-demo-pct {
  font-size: 11px; font-weight: 700; color: var(--color);
  min-width: 30px; text-align: right;
}
.card-demo-last { font-size: 11px; color: var(--text-3); }

/* ===========================
   Responsive
   =========================== */
@media (max-width: 768px) {
  section { padding: 64px 0; }

  .nav-links { display: none; }
  .nav-links.open {
    display: flex;
    flex-direction: column;
    position: absolute;
    top: 64px;
    left: 0;
    right: 0;
    background: rgba(11, 18, 32, 0.98);
    padding: 12px 16px 20px;
    gap: 2px;
    border-bottom: 1px solid var(--border-light);
  }
  .nav-toggle { display: flex; }

  .gallery-grid { grid-template-columns: 1fr 1fr; }
  .gallery-item:first-child,
  .gallery-item:nth-child(4) { grid-column: span 1; }

  .pipeline-steps { gap: 6px; }
  .pipeline-step { min-width: 80px; }
  .pipeline-arrow { font-size: 18px; }

  .step { padding: 24px 20px; }
  .step-header { gap: 14px; }

  .hosting-options { flex-direction: column; }

  .mqtt-topic { flex-direction: column; align-items: flex-start; gap: 5px; }

  .lightbox-prev { left: 8px; }
  .lightbox-next { right: 8px; }
}

@media (max-width: 480px) {
  .gallery-grid { grid-template-columns: 1fr; }
  .gallery-item:first-child,
  .gallery-item:nth-child(4) { grid-column: span 1; }

  .pipeline-arrow { display: none; }
  .pipeline-steps { flex-direction: column; gap: 16px; }
}