:root {
  --bg: #f4f7f9;
  --panel: #ffffff;
  --text: #102a43;
  --muted: #627d98;
  --primary: #1f7a8c;
  --danger: #d64545;
  --border: #d9e2ec;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: "Source Sans 3", "Segoe UI", sans-serif;
  background: radial-gradient(circle at top right, #dceef2, #f4f7f9 40%);
  color: var(--text);
}

.container {
  width: min(960px, 92vw);
  margin: 0 auto;
}

.site-header {
  border-bottom: 1px solid var(--border);
  background: #f9fcfd;
}

.header-inner {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 0.9rem 0;
}

.brand {
  font-size: 1.2rem;
  font-weight: 700;
  text-decoration: none;
  color: var(--text);
}

.nav {
  display: flex;
  gap: 1rem;
  align-items: center;
}

.nav a,
.link-btn {
  color: var(--primary);
  background: none;
  border: 0;
  cursor: pointer;
  text-decoration: none;
  font: inherit;
}

.hero,
.card {
  margin-top: 2rem;
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 1.25rem;
}

.hero-actions,
.inline-subscribe {
  margin-top: 1rem;
}

.btn,
.danger-btn {
  border: 0;
  border-radius: 8px;
  padding: 0.55rem 0.9rem;
  cursor: pointer;
}

.btn {
  background: var(--primary);
  color: #fff;
  text-decoration: none;
  display: inline-block;
}

.btn-secondary {
  background: #eef4f7;
  color: var(--text);
  border: 1px solid var(--border);
}

.danger-btn {
  background: var(--danger);
  color: #fff;
}

.stack-form,
.inline-subscribe {
  display: grid;
  gap: 0.75rem;
}

input {
  width: 100%;
  margin-top: 0.25rem;
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 0.6rem;
}

.feed-list {
  list-style: none;
  margin: 1rem 0 0;
  padding: 0;
  display: grid;
  gap: 0.6rem;
}

.feed-list li {
  display: flex;
  justify-content: space-between;
  align-items: center;
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 0.6rem;
  gap: 0.6rem;
}

.flash-list {
  list-style: none;
  padding: 0;
  margin-top: 1rem;
  display: grid;
  gap: 0.5rem;
}

.flash {
  border-radius: 8px;
  padding: 0.6rem;
}

.flash.success {
  background: #e2f7e7;
}

.flash.warning {
  background: #fff6dc;
}

.flash.danger {
  background: #fde8e8;
}

.flash.info {
  background: #e5f2ff;
}

.inline-form {
  display: inline;
}