:root {
  --bg: #06131a;
  --bg-soft: #0d212c;
  --panel: rgba(10, 30, 39, 0.88);
  --panel-strong: rgba(15, 39, 50, 0.96);
  --line: rgba(111, 205, 214, 0.16);
  --line-strong: rgba(131, 225, 232, 0.28);
  --text: #ecfafc;
  --muted: #9fbdc5;
  --accent: #5eead4;
  --accent-strong: #8ef6e6;
  --accent-soft: rgba(94, 234, 212, 0.14);
  --warm: #ff9d5c;
  --success: #90f7b5;
  --danger: #ff8484;
  --shadow: 0 28px 80px rgba(0, 0, 0, 0.34);
}

* {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  min-height: 100%;
}

body {
  background:
    radial-gradient(
      circle at 15% 15%,
      rgba(40, 159, 176, 0.24),
      transparent 22%
    ),
    radial-gradient(
      circle at 85% 10%,
      rgba(255, 157, 92, 0.16),
      transparent 16%
    ),
    linear-gradient(180deg, #08161d 0%, #041017 100%);
  color: var(--text);
  font-family: 'Outfit', sans-serif;
}

.app-shell {
  display: grid;
  grid-template-columns: 290px minmax(0, 1fr);
  min-height: 100vh;
}

.sidebar {
  padding: 28px 22px;
  border-right: 1px solid var(--line);
  background: rgba(5, 18, 24, 0.78);
  backdrop-filter: blur(20px);
}

.sidebar-kicker,
.workspace-kicker,
.hero-kicker,
.panel-kicker,
.sidebar-card-label {
  margin: 0 0 10px;
  color: var(--accent-strong);
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.18em;
  text-transform: uppercase;
}

.sidebar-brand h1,
.workspace-header h2,
.hero-panel h3,
.panel-header h3 {
  margin: 0;
}

.sidebar-copy,
.hero-panel p,
.sidebar-card p,
.student-meta,
.item-meta,
.message-preview,
.billing-meta {
  color: var(--muted);
  line-height: 1.6;
}

.sidebar-nav {
  display: grid;
  gap: 10px;
  margin-top: 28px;
}

.nav-link,
.role-button {
  appearance: none;
  border: 1px solid transparent;
  background: transparent;
  color: var(--text);
  font: inherit;
  cursor: pointer;
}

.nav-link {
  padding: 14px 16px;
  border-radius: 16px;
  text-align: left;
  transition: 180ms ease;
}

.nav-link:hover,
.nav-link.is-active {
  border-color: var(--line-strong);
  background: var(--accent-soft);
}

.sidebar-card {
  margin-top: 28px;
  padding: 18px;
  border: 1px solid var(--line);
  border-radius: 22px;
  background: rgba(255, 255, 255, 0.03);
}

.sidebar-card strong {
  display: block;
  margin-bottom: 8px;
  font-size: 1.08rem;
}

.workspace {
  padding: 28px;
}

.workspace-header,
.install-strip,
.hero-panel,
.panel,
.metric-card {
  border: 1px solid var(--line);
  background: var(--panel);
  box-shadow: var(--shadow);
  backdrop-filter: blur(20px);
}

.workspace-header {
  display: flex;
  justify-content: space-between;
  gap: 18px;
  align-items: center;
  padding: 20px 22px;
  border-radius: 28px;
}

.workspace-controls {
  display: flex;
  flex-wrap: wrap;
  justify-content: flex-end;
  gap: 12px;
  align-items: center;
}

.role-switch {
  display: inline-flex;
  padding: 5px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.03);
}

.role-button {
  padding: 10px 16px;
  border-radius: 999px;
  color: var(--muted);
  font-weight: 600;
}

.role-button.is-active {
  background: linear-gradient(
    90deg,
    rgba(94, 234, 212, 0.22),
    rgba(94, 234, 212, 0.1)
  );
  color: var(--text);
}

.workspace-badge,
.panel-pill {
  display: inline-flex;
  align-items: center;
  padding: 10px 14px;
  border: 1px solid var(--line);
  border-radius: 999px;
  color: var(--accent-strong);
  background: rgba(255, 255, 255, 0.03);
  font-size: 0.92rem;
  font-weight: 600;
}

.install-strip {
  display: grid;
  grid-template-columns: 1.2fr minmax(260px, 0.8fr);
  gap: 18px;
  align-items: center;
  margin-top: 22px;
  padding: 24px;
  border-radius: 28px;
  background:
    linear-gradient(90deg, rgba(94, 234, 212, 0.08), rgba(255, 157, 92, 0.08)),
    var(--panel);
}

.install-strip h3 {
  margin: 0;
  font-size: clamp(1.35rem, 2vw, 1.8rem);
}

.install-actions {
  display: grid;
  gap: 12px;
  justify-items: start;
}

.install-preview {
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 14px;
  width: 100%;
  border: 1px solid var(--line);
  border-radius: 22px;
  background: rgba(255, 255, 255, 0.04);
}

.install-preview-icon {
  width: 68px;
  height: 68px;
  border-radius: 20px;
  object-fit: cover;
  box-shadow: 0 12px 26px rgba(0, 0, 0, 0.25);
}

.install-preview strong,
.install-preview span {
  display: block;
}

.install-preview span,
.install-note {
  color: var(--muted);
}

.install-button {
  padding: 14px 20px;
  border: 1px solid rgba(131, 225, 232, 0.28);
  border-radius: 999px;
  background: linear-gradient(
    90deg,
    rgba(94, 234, 212, 0.24),
    rgba(94, 234, 212, 0.1)
  );
  color: var(--text);
  font: inherit;
  font-weight: 700;
  cursor: pointer;
  transition:
    transform 180ms ease,
    border-color 180ms ease,
    background 180ms ease;
}

.install-button:hover {
  transform: translateY(-1px);
  border-color: rgba(131, 225, 232, 0.45);
}

.install-button[hidden] {
  display: none;
}

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

.demo-link {
  display: inline-flex;
  align-items: center;
  padding: 10px 14px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.04);
  color: var(--text);
  font-weight: 600;
  text-decoration: none;
  transition:
    transform 180ms ease,
    border-color 180ms ease,
    background 180ms ease;
}

.demo-link:hover {
  transform: translateY(-1px);
  border-color: var(--line-strong);
  background: var(--accent-soft);
}

.install-note {
  margin: 0;
  font-size: 0.94rem;
  line-height: 1.6;
}

.hero-panel {
  display: grid;
  grid-template-columns: 1.5fr minmax(240px, 0.8fr);
  gap: 18px;
  margin-top: 22px;
  padding: 24px;
  border-radius: 28px;
}

.hero-panel h3 {
  font-size: clamp(1.8rem, 3vw, 2.6rem);
}

.hero-highlight {
  padding: 20px;
  border-radius: 24px;
  background:
    linear-gradient(180deg, rgba(94, 234, 212, 0.18), rgba(94, 234, 212, 0.05)),
    rgba(255, 255, 255, 0.03);
}

.hero-highlight-label,
.hero-highlight-meta {
  display: block;
}

.hero-highlight-label {
  margin-bottom: 10px;
  color: var(--muted);
  font-size: 0.92rem;
}

.hero-highlight strong {
  display: block;
  font-size: 1.2rem;
  line-height: 1.4;
}

.hero-highlight-meta {
  margin-top: 10px;
  color: var(--accent-strong);
}

.metrics-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 16px;
  margin-top: 22px;
}

.metric-card {
  padding: 18px;
  border-radius: 22px;
}

.metric-label {
  color: var(--muted);
  font-size: 0.9rem;
}

.metric-value {
  display: block;
  margin-top: 10px;
  font-size: 2rem;
  font-weight: 700;
}

.metric-detail {
  margin-top: 8px;
  color: var(--accent-strong);
  font-size: 0.92rem;
}

.content-grid {
  display: grid;
  grid-template-columns: 1.3fr 1fr;
  gap: 16px;
  margin-top: 22px;
}

.panel {
  padding: 20px;
  border-radius: 26px;
}

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

.panel-header {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  align-items: center;
  margin-bottom: 18px;
}

.student-layout {
  display: grid;
  grid-template-columns: minmax(220px, 280px) minmax(0, 1fr);
  gap: 16px;
}

.student-list,
.stack-list,
.timeline-list,
.message-list,
.billing-list {
  display: grid;
  gap: 12px;
}

.student-card,
.stack-item,
.timeline-item,
.message-item,
.billing-item,
.detail-card {
  padding: 16px;
  border: 1px solid var(--line);
  border-radius: 20px;
  background: rgba(255, 255, 255, 0.03);
}

.student-card {
  cursor: pointer;
  text-align: left;
}

.student-card.is-active {
  border-color: var(--line-strong);
  background: rgba(94, 234, 212, 0.09);
}

.student-card strong,
.detail-card strong,
.stack-item strong,
.timeline-item strong,
.message-item strong,
.billing-item strong {
  display: block;
  margin-bottom: 6px;
  font-size: 1rem;
}

.student-meta,
.detail-grid,
.detail-list {
  font-size: 0.94rem;
}

.detail-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 12px;
  margin-top: 14px;
}

.detail-grid span,
.detail-list span {
  display: block;
  color: var(--muted);
  font-size: 0.84rem;
}

.detail-grid strong,
.detail-list strong {
  margin-top: 4px;
  margin-bottom: 0;
}

.detail-list {
  display: grid;
  gap: 10px;
  margin-top: 16px;
}

.status-pill {
  display: inline-flex;
  align-items: center;
  padding: 6px 10px;
  border-radius: 999px;
  font-size: 0.82rem;
  font-weight: 700;
}

.status-pill.is-good {
  background: rgba(144, 247, 181, 0.16);
  color: var(--success);
}

.status-pill.is-warn {
  background: rgba(255, 157, 92, 0.15);
  color: var(--warm);
}

.status-pill.is-alert {
  background: rgba(255, 132, 132, 0.15);
  color: var(--danger);
}

@media (max-width: 1180px) {
  .app-shell,
  .content-grid,
  .install-strip,
  .hero-panel,
  .student-layout,
  .metrics-grid {
    grid-template-columns: 1fr;
  }

  .sidebar {
    border-right: 0;
    border-bottom: 1px solid var(--line);
  }
}

@media (max-width: 720px) {
  .workspace,
  .sidebar {
    padding: 18px;
  }

  .workspace-header {
    align-items: flex-start;
  }

  .workspace-header,
  .workspace-controls,
  .panel-header {
    flex-direction: column;
  }

  .detail-grid {
    grid-template-columns: 1fr;
  }
}