:root {
  --pc-black: #05080c;
  --pc-cyan: #61dde5;
  --pc-cyan-strong: #22c7d3;
  --pc-lime: #77f25c;
  --pc-paper: #f4f8fa;
  --pc-ink: #0e1722;
  --pc-muted: #5e6b78;
  --pc-border: #d6e1e8;
  --pc-danger: #c53943;
  --pc-success: #198754;
  --pc-warning: #b77700;

  --bg: var(--pc-paper);
  --surface: #ffffff;
  --surface-2: #f7fbfd;
  --text: var(--pc-ink);
  --text-muted: var(--pc-muted);
  --border: var(--pc-border);
  --primary: var(--pc-cyan-strong);
  --danger: var(--pc-danger);
  --success: var(--pc-success);
  --warning: var(--pc-warning);

  --radius-sm: 10px;
  --radius-md: 14px;
  --radius-lg: 20px;
  --shadow-soft: 0 16px 40px rgba(7, 20, 32, 0.08);
  --shadow-card: 0 8px 24px rgba(5, 8, 12, 0.06);

  --font-main: "Avenir Next", "Futura", "Trebuchet MS", "Segoe UI", sans-serif;
}

* {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  padding: 0;
}

body {
  font-family: var(--font-main);
  background:
    radial-gradient(circle at 8% -4%, rgba(97, 221, 229, 0.28), transparent 35%),
    radial-gradient(circle at 95% 6%, rgba(119, 242, 92, 0.2), transparent 32%),
    var(--bg);
  color: var(--text);
  line-height: 1.5;
  min-height: 100vh;
}

a {
  color: #077a8c;
  text-decoration: none;
  transition: color 140ms ease;
}

a:hover {
  color: #055c69;
}

a:focus-visible,
button:focus-visible,
input:focus-visible,
select:focus-visible,
textarea:focus-visible {
  outline: 3px solid rgba(34, 199, 211, 0.35);
  outline-offset: 2px;
}

h1,
h2,
h3,
h4,
h5,
h6 {
  margin: 0;
  line-height: 1.16;
  letter-spacing: -0.015em;
}

p {
  margin: 0;
}

code {
  background: #e9f7fa;
  border: 1px solid #cfeef3;
  border-radius: 8px;
  padding: 2px 7px;
  font-size: 0.86em;
}

ul {
  margin: 0;
  padding-left: 18px;
}

.pc-shell {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

.pc-main {
  flex: 1;
  padding: 28px 0 44px;
}

.pc-container {
  width: min(1180px, calc(100% - 32px));
  margin: 0 auto;
}

.pc-stack-sm {
  display: grid;
  gap: 8px;
}

.pc-stack-md {
  display: grid;
  gap: 14px;
}

.pc-stack-lg {
  display: grid;
  gap: 18px;
}

.pc-stack-xl {
  display: grid;
  gap: 24px;
}

.pc-grid-2 {
  display: grid;
  gap: 16px;
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.pc-grid-3 {
  display: grid;
  gap: 16px;
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

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

.pc-empty {
  color: var(--text-muted);
  font-style: italic;
}

.pc-text-danger {
  color: var(--danger);
}

.pc-text-success {
  color: var(--success);
}

.pc-text-center {
  text-align: center;
}

@keyframes pc-rise-in {
  from {
    opacity: 0;
    transform: translateY(12px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@media (max-width: 980px) {
  .pc-grid-2,
  .pc-grid-3 {
    grid-template-columns: 1fr;
  }

  .pc-main {
    padding-top: 22px;
  }
}