:root {
  --bg: #f4efe7;
  --panel: rgba(255, 251, 245, 0.86);
  --panel-strong: #fff7ee;
  --ink: #1f2430;
  --muted: #5d6576;
  --line: rgba(31, 36, 48, 0.12);
  --brand: #0c7c59;
  --brand-deep: #095b41;
  --accent: #ffb347;
  --shadow: 0 20px 50px rgba(35, 37, 41, 0.09);
  --radius: 26px;
}

* {
  box-sizing: border-box;
}

html {
  font-size: 16px;
}

body {
  margin: 0;
  min-height: 100vh;
  color: var(--ink);
  font-family: "Segoe UI Variable", "Trebuchet MS", sans-serif;
  background:
    radial-gradient(circle at top left, rgba(255, 179, 71, 0.22), transparent 26%),
    radial-gradient(circle at top right, rgba(12, 124, 89, 0.18), transparent 22%),
    linear-gradient(180deg, #f7f0e8 0%, #f2ebe4 100%);
}

body::before {
  content: "";
  position: fixed;
  inset: 0;
  pointer-events: none;
  background-image: linear-gradient(rgba(31, 36, 48, 0.02) 1px, transparent 1px), linear-gradient(90deg, rgba(31, 36, 48, 0.02) 1px, transparent 1px);
  background-size: 28px 28px;
  mask-image: radial-gradient(circle at center, black 45%, transparent 90%);
}

code {
  font-family: "Cascadia Mono", "Consolas", monospace;
}

.page-shell {
  position: relative;
  max-width: 1180px;
  margin: 0 auto;
  padding: 28px 20px 48px;
}

.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  margin-bottom: 28px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  color: var(--ink);
  text-decoration: none;
  font-size: 1.1rem;
  font-weight: 800;
  letter-spacing: 0.02em;
}

.brand-mark {
  width: 16px;
  height: 16px;
  border-radius: 999px;
  background: linear-gradient(135deg, var(--brand) 0%, var(--accent) 100%);
  box-shadow: 0 0 0 8px rgba(12, 124, 89, 0.09);
}

.topnav {
  display: inline-flex;
  flex-wrap: wrap;
  gap: 14px;
  align-items: center;
}

.topnav a,
.link-row a {
  color: var(--brand-deep);
  text-decoration: none;
  font-weight: 700;
}

.inline-form {
  margin: 0;
}

.nav-button {
  padding: 0;
  border: none;
  background: transparent;
  color: var(--brand-deep);
  font: inherit;
  font-weight: 700;
  cursor: pointer;
}

.content-shell {
  display: grid;
  gap: 24px;
}

.hero,
.grid,
.panel {
  position: relative;
  z-index: 1;
}

.hero {
  display: grid;
  grid-template-columns: minmax(0, 1.35fr) minmax(280px, 0.9fr);
  gap: 22px;
  align-items: stretch;
}

.hero-copy,
.hero-card,
.panel,
.mini-card {
  background: var(--panel);
  backdrop-filter: blur(12px);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
}

.hero-copy {
  padding: 34px;
}

.hero-card,
.panel,
.mini-card {
  padding: 28px;
}

.hero h1,
.panel h1 {
  margin: 12px 0 14px;
  font-size: clamp(2rem, 4vw, 4rem);
  line-height: 0.95;
  letter-spacing: -0.04em;
}

.hero h2,
.panel h2,
.mini-card h2 {
  margin: 0 0 12px;
  font-size: 1.2rem;
}

.lead,
.panel p,
.mini-card p,
.hero-card li {
  color: var(--muted);
  line-height: 1.6;
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 12px;
  border-radius: 999px;
  background: rgba(12, 124, 89, 0.08);
  color: var(--brand-deep);
  font-size: 0.86rem;
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

.hero-actions,
.stack-actions,
.link-row,
.inline-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.hero-actions {
  margin-top: 24px;
}

.stack-actions {
  margin-top: 24px;
}

.auth-panel {
  margin: 0 auto;
}

.auth-form {
  display: grid;
  gap: 16px;
  margin-top: 24px;
}

.field-block {
  display: grid;
  gap: 8px;
}

.field-block span {
  font-weight: 700;
}

.field-block input {
  min-height: 50px;
  padding: 0 16px;
  border-radius: 16px;
  border: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.72);
  color: var(--ink);
  font: inherit;
}

.field-block small {
  color: #b42318;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 48px;
  padding: 0 18px;
  border-radius: 16px;
  border: 1px solid transparent;
  text-decoration: none;
  font-weight: 800;
  transition: transform 0.15s ease, border-color 0.15s ease, background 0.15s ease;
}

.btn:hover {
  transform: translateY(-1px);
}

.btn-primary {
  color: #fff;
  background: linear-gradient(135deg, var(--brand) 0%, var(--brand-deep) 100%);
}

.btn-secondary {
  color: var(--ink);
  background: rgba(255, 255, 255, 0.55);
  border-color: var(--line);
}

.check-list {
  margin: 0;
  padding-left: 18px;
}

.grid.two-up {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 22px;
}

.grid.three-up {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 18px;
  margin-top: 22px;
}

.panel.accent {
  background: linear-gradient(180deg, rgba(255, 236, 209, 0.92), rgba(255, 251, 245, 0.92));
}

.panel.narrow {
  max-width: 760px;
}

.panel.wide {
  width: 100%;
}

.notice {
  display: grid;
  gap: 8px;
  margin-top: 22px;
  padding: 16px 18px;
  border-radius: 18px;
  background: rgba(255, 255, 255, 0.55);
  border: 1px solid var(--line);
}

.notice.success {
  background: rgba(12, 124, 89, 0.08);
  border-color: rgba(12, 124, 89, 0.18);
}

.notice.warning {
  background: rgba(255, 179, 71, 0.12);
  border-color: rgba(255, 179, 71, 0.24);
}

.notice.error {
  background: rgba(180, 35, 24, 0.08);
  border-color: rgba(180, 35, 24, 0.18);
}

.meta-list {
  display: grid;
  gap: 12px;
  margin: 22px 0 0;
}

.meta-list div {
  display: grid;
  gap: 4px;
}

.meta-list dt {
  color: var(--muted);
  font-size: 0.92rem;
}

.meta-list dd {
  margin: 0;
  font-weight: 700;
}

.muted {
  color: var(--muted);
}

.subsection {
  display: grid;
  gap: 18px;
  margin-top: 28px;
}

.section-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}

.device-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 18px;
}

.device-card {
  display: grid;
  gap: 14px;
}

.device-create-card,
.connection-panel,
.instruction-card {
  display: grid;
  gap: 16px;
}

.device-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
}

.device-head h3 {
  margin: 0;
  font-size: 1.05rem;
}

.tag {
  display: inline-flex;
  align-items: center;
  min-height: 28px;
  padding: 0 10px;
  border-radius: 999px;
  background: rgba(12, 124, 89, 0.08);
  color: var(--brand-deep);
  font-size: 0.82rem;
  font-weight: 800;
}

.device-create-form {
  display: grid;
  gap: 18px;
}

.platform-picker {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 10px;
}

.platform-option {
  position: relative;
  display: flex;
}

.platform-option input {
  position: absolute;
  opacity: 0;
  pointer-events: none;
}

.platform-option span {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 100%;
  min-height: 48px;
  padding: 0 14px;
  border-radius: 16px;
  border: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.55);
  font-weight: 700;
  cursor: pointer;
}

.platform-option input:checked + span {
  border-color: rgba(12, 124, 89, 0.42);
  background: rgba(12, 124, 89, 0.1);
  color: var(--brand-deep);
}

.access-link-box {
  padding: 18px;
  border-radius: 18px;
  border: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.62);
  overflow-x: auto;
}

.access-link-box code {
  white-space: normal;
  word-break: break-all;
  line-height: 1.65;
  font-size: 0.95rem;
}

.instruction-card a {
  color: var(--brand-deep);
}

@media (max-width: 900px) {
  .hero,
  .grid.two-up,
  .grid.three-up,
  .device-grid {
    grid-template-columns: 1fr;
  }

  .platform-picker {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .topbar {
    flex-direction: column;
    align-items: flex-start;
  }

  .hero-copy,
  .hero-card,
  .panel,
  .mini-card {
    padding: 22px;
  }
}