/* Shared by Jekyll static pages and Flask subscriber app (one canonical file). */
:root {
  --fg: #1a1a1a;
  --fg-muted: #4a4a4a;
  --bg: #f7f7f2;
  --panel: #ffffff;
  --border: #d8d6cf;
  --accent: #0b5fa5;
  --accent-hover: #094880;
  --err-bg: #fdeaea;
  --err-fg: #6b1010;
}

* {
  box-sizing: border-box;
}

html {
  font-size: 16px;
  -webkit-text-size-adjust: 100%;
}

body {
  margin: 0;
  min-height: 100vh;
  font-family: "Segoe UI", system-ui, -apple-system, sans-serif;
  line-height: 1.5;
  color: var(--fg);
  background: var(--bg);
}

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

.site-header__inner {
  max-width: 48rem;
  margin: 0 auto;
  padding: 0.9rem 1.25rem;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 0.75rem 1rem;
}

.site-title {
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--fg);
  text-decoration: none;
}

.site-title:hover,
.site-title:focus {
  text-decoration: underline;
}

.site-nav {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem 1rem;
  font-size: 0.95rem;
}

.site-nav a {
  color: var(--accent);
  text-decoration: none;
}

.site-nav a:hover,
.site-nav a:focus {
  color: var(--accent-hover);
  text-decoration: underline;
}

main {
  max-width: 48rem;
  margin: 0 auto;
  padding: 1.5rem 1.25rem 2.5rem;
}

h1 {
  font-size: 1.5rem;
  line-height: 1.2;
  margin: 0 0 0.75rem;
}

h2 {
  font-size: 1.1rem;
  margin: 1.5rem 0 0.5rem;
}

p,
ul {
  color: var(--fg-muted);
  margin: 0 0 1rem;
}

ul {
  padding-left: 1.2rem;
}

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

.card {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 1.1rem 1.25rem;
  margin: 0 0 1rem;
}

.muted {
  color: var(--fg-muted);
  font-size: 0.95rem;
}

.form-row {
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
  margin: 0 0 0.9rem;
}

label {
  font-weight: 600;
  font-size: 0.9rem;
  color: var(--fg);
}

input[type="email"] {
  max-width: 24rem;
  padding: 0.45rem 0.55rem;
  border: 1px solid var(--border);
  border-radius: 4px;
  font: inherit;
}

button,
.btn {
  display: inline-block;
  font: inherit;
  font-weight: 600;
  color: #fff;
  background: var(--accent);
  border: none;
  border-radius: 4px;
  padding: 0.45rem 0.9rem;
  cursor: pointer;
  text-decoration: none;
}

button:hover,
button:focus,
.btn:hover,
.btn:focus {
  background: var(--accent-hover);
}

.error-box {
  background: var(--err-bg);
  color: var(--err-fg);
  border: 1px solid #e4b4b4;
  border-radius: 6px;
  padding: 0.9rem 1rem;
  margin: 0 0 1rem;
  font-size: 0.95rem;
}

.site-footer {
  max-width: 48rem;
  margin: 2rem auto 0;
  padding: 0 1.25rem 1.5rem;
  font-size: 0.85rem;
  color: var(--fg-muted);
}