:root {
  color-scheme: light dark;
  --bg: #f6f7fb;
  --card: #ffffff;
  --text: #1f2937;
  --muted: #6b7280;
  --border: #e5e7eb;
  --accent: #4f46e5;
  --accent-soft: #eef2ff;
  --shadow: 0 10px 30px rgba(17, 24, 39, 0.08);
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0f1115;
    --card: #151a23;
    --text: #e5e7eb;
    --muted: #9aa4b2;
    --border: #273041;
    --accent: #8b5cf6;
    --accent-soft: #2b2243;
    --shadow: 0 12px 32px rgba(0, 0, 0, 0.4);
  }
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: "Outfit", "Inter", "Segoe UI", system-ui, -apple-system, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.5;
}

.page {
  max-width: 1100px;
  margin: 0 auto;
  padding: 28px 20px 50px;
}

.hero {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  padding: 24px;
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 18px;
  box-shadow: var(--shadow);
}

.hero h1 {
  margin: 0 0 10px;
  font-size: 30px;
  letter-spacing: -0.02em;
}

.subtitle {
  margin: 0;
  color: var(--muted);
  font-size: 15px;
}

.badges {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
}

.badge {
  padding: 6px 12px;
  border-radius: 999px;
  background: var(--accent-soft);
  color: var(--accent);
  font-weight: 600;
  font-size: 12px;
}

.tabs {
  display: flex;
  gap: 10px;
  margin: 24px 0 16px;
  flex-wrap: wrap;
}

.tab {
  border: 1px solid var(--border);
  background: var(--card);
  color: var(--text);
  border-radius: 999px;
  padding: 10px 16px;
  cursor: pointer;
  font-weight: 600;
  transition: all 0.2s ease;
}

.tab.active {
  background: var(--accent);
  color: white;
  border-color: transparent;
}

.tab-panel {
  display: none;
  gap: 18px;
}

.tab-panel.active {
  display: block;
}

.grid {
  display: grid;
  gap: 18px;
}

.grid.two {
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
}

.grid.three {
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
}

.card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 18px;
  box-shadow: var(--shadow);
  transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.card:hover {
  transform: translateY(-4px);
  box-shadow: 0 16px 40px rgba(17, 24, 39, 0.12);
}

@media (prefers-color-scheme: dark) {
  .card:hover {
    box-shadow: 0 16px 40px rgba(0, 0, 0, 0.5);
  }
}

.card h2 {
  margin-top: 0;
  font-size: 20px;
}

.list {
  margin: 10px 0 0;
  padding-left: 18px;
  color: var(--muted);
}

.list li {
  margin: 6px 0;
}

.steps {
  display: grid;
  gap: 10px;
  margin-top: 10px;
}

.step {
  border: 1px solid var(--border);
  background: transparent;
  border-radius: 12px;
  padding: 12px 14px;
  display: flex;
  gap: 12px;
  align-items: center;
  text-align: left;
  cursor: pointer;
  transition: all 0.2s ease;
}

.step span {
  width: 32px;
  height: 32px;
  border-radius: 10px;
  background: var(--accent-soft);
  color: var(--accent);
  display: grid;
  place-items: center;
  font-weight: 700;
}

.step.active {
  border-color: var(--accent);
  background: var(--accent-soft);
}

.step-detail {
  margin-top: 12px;
  padding: 12px;
  border-radius: 12px;
  background: var(--accent-soft);
  color: var(--text);
}

.pill {
  padding: 10px 14px;
  background: var(--accent-soft);
  border-radius: 999px;
  text-align: center;
  font-weight: 600;
  border: 1px solid transparent;
  cursor: pointer;
  transition: all 0.2s ease;
  color: var(--text);
  font-size: 14px;
}

.pill:hover {
  filter: brightness(0.95);
  transform: scale(1.02);
}

.pill.active {
  background: var(--accent);
  color: white;
  border-color: transparent;
}

.mt-3 {
  margin-top: 16px;
}

.dialogue {
  background: linear-gradient(135deg, var(--card), var(--accent-soft));
}

.bubble {
  max-width: 80%;
  margin: 10px 0;
  padding: 10px 14px;
  border-radius: 16px;
  background: var(--card);
  border: 1px solid var(--border);
}

.bubble.right {
  margin-left: auto;
  background: var(--accent-soft);
}

.flow-admin {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 10px;
  flex-wrap: wrap;
  margin-top: 16px;
}

.flow-admin-step {
  flex: 1;
  min-width: 140px;
  text-align: center;
  padding: 16px;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 12px;
  font-size: 13px;
  font-weight: 600;
  display: flex;
  flex-direction: column;
  gap: 8px;
  transition: all 0.2s ease;
}

.flow-admin-step:hover {
  border-color: var(--accent);
  transform: translateY(-2px);
}

.flow-admin-step .icon {
  font-size: 24px;
}

.flow-arrow {
  color: var(--accent);
  font-weight: bold;
}

.module-card h3 {
  margin: 0 0 6px;
}

.module-card p {
  margin: 0;
  color: var(--muted);
}

.schema {
  position: relative;
  margin: 16px 0 12px;
  padding: 20px;
  border-radius: 16px;
  background: var(--bg);
  border: 1px dashed var(--border);
}

.schema-nodes {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
  gap: 16px;
  position: relative;
  z-index: 2;
}

.node {
  padding: 14px;
  border-radius: 14px;
  background: var(--card);
  border: 1px solid var(--border);
  text-align: center;
  font-weight: 600;
  transition: all 0.3s ease;
}

.node.active {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(79, 70, 229, 0.15);
}

.schema-lines {
  position: absolute;
  inset: 0;
  pointer-events: none;
}

.line {
  position: absolute;
  height: 3px;
  background: linear-gradient(90deg, transparent, var(--accent), transparent);
  opacity: 0.25;
  border-radius: 999px;
}

.line.active {
  opacity: 1;
  animation: pulse-line 1.6s ease-in-out infinite;
}

.line[data-line="front-back"] {
  top: 42%;
  left: 12%;
  width: 50%;
}

.line[data-line="back-db"] {
  top: 42%;
  right: 12%;
  width: 50%;
  transform: translateX(0);
}

.line[data-line="back-mail"] {
  top: 70%;
  left: 40%;
  width: 30%;
  transform: rotate(8deg);
}

.schema-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 12px;
}

.schema-btn {
  padding: 8px 14px;
  border-radius: 999px;
  border: 1px solid var(--border);
  background: var(--card);
  cursor: pointer;
  font-weight: 600;
  transition: all 0.2s ease;
}

.schema-btn.active {
  background: var(--accent);
  color: white;
  border-color: transparent;
}

.schema-detail {
  margin-top: 12px;
  padding: 12px;
  border-radius: 12px;
  background: var(--accent-soft);
  color: var(--text);
}

#db-search {
  width: 100%;
  padding: 12px 14px;
  border-radius: 12px;
  border: 1px solid var(--border);
  background: var(--bg);
  color: var(--text);
}

.table-card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 14px;
}

.table-card h3 {
  margin: 0 0 6px;
}

.table-card p {
  margin: 0 0 8px;
  color: var(--muted);
}

.relations {
  font-size: 12px;
  color: var(--accent);
  font-weight: 600;
}

.accordion {
  margin-top: 10px;
  border: 1px solid var(--border);
  border-radius: 12px;
  overflow: hidden;
}

.accordion-trigger {
  width: 100%;
  text-align: left;
  background: var(--card);
  border: none;
  padding: 12px 14px;
  font-weight: 600;
  cursor: pointer;
}

.accordion-panel {
  display: none;
  padding: 12px 14px;
  background: var(--bg);
  color: var(--muted);
}

.accordion.open .accordion-panel {
  display: block;
}

.footer {
  text-align: center;
  color: var(--muted);
  margin-top: 26px;
  font-size: 13px;
}

@media (max-width: 720px) {
  .hero {
    flex-direction: column;
    align-items: flex-start;
  }
}

@keyframes pulse-line {
  0% {
    opacity: 0.3;
    transform: scaleX(0.9);
  }
  50% {
    opacity: 1;
    transform: scaleX(1);
  }
  100% {
    opacity: 0.4;
    transform: scaleX(0.9);
  }
}

.highlights {
  background: linear-gradient(135deg, var(--card), var(--accent-soft));
  border: 1px solid var(--accent);
}

.highlight-item h3 {
  font-size: 16px;
  margin-bottom: 5px;
  color: var(--accent);
}

.highlight-item p {
  font-size: 14px;
  margin: 0;
  color: var(--muted);
}

strong {
  color: var(--accent);
}