:root {
  --bg: #f7f8f6;
  --bg-soft: #eef2ee;
  --surface: #ffffff;
  --text: #1b2430;
  --muted: #54606e;
  --primary: #176b87;
  --primary-dark: #0f4556;
  --accent: #d96c3f;
  --border: #d9e0d4;
  --ok: #1d7b53;
  --ko: #9f2f2f;
  --shadow: 0 8px 22px rgba(22, 31, 38, 0.07);
  --shadow-strong: 0 14px 32px rgba(22, 31, 38, 0.11);
  --radius: 8px;
  --font-body: 'IBM Plex Sans', 'Segoe UI', 'Helvetica Neue', Arial, sans-serif;
  --font-heading: 'Merriweather Sans', 'Trebuchet MS', sans-serif;
}

* {
  box-sizing: border-box;
}

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

body {
  background: linear-gradient(180deg, #fbfaf7 0%, var(--bg) 42%, #f3f6f2 100%);
  color: var(--text);
  font-family: var(--font-body);
  line-height: 1.5;
  overflow-x: hidden;
}

a {
  color: var(--primary-dark);
}

code {
  padding: 0.1rem 0.32rem;
  background: #ecf3f6;
  border-radius: 6px;
  font-size: 0.94em;
}

h1,
h2,
h3 {
  font-family: var(--font-heading);
  line-height: 1.25;
  margin: 0 0 0.8rem;
}

p {
  margin: 0 0 0.9rem;
}

.btn {
  border: 1px solid transparent;
  border-radius: 8px;
  min-height: 2.55rem;
  padding: 0.58rem 0.95rem;
  font-size: 0.95rem;
  font-weight: 600;
  cursor: pointer;
  text-decoration: none;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.3rem;
  transition: transform 0.15s ease, background 0.15s ease, border-color 0.15s ease, box-shadow 0.15s ease;
}

.btn:hover {
  transform: translateY(-1px);
  box-shadow: 0 7px 14px rgba(22, 31, 38, 0.1);
}

.btn:focus-visible,
a:focus-visible,
input:focus-visible,
select:focus-visible {
  outline: 3px solid rgba(23, 107, 135, 0.25);
  outline-offset: 2px;
}

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

.btn-primary:hover {
  background: var(--primary-dark);
}

.btn-secondary {
  background: var(--bg-soft);
  color: var(--text);
  border-color: var(--border);
}

.btn-ghost {
  border-color: var(--primary);
  color: var(--primary-dark);
  background: transparent;
}

.btn-danger {
  background: #f4d8d8;
  color: #7a2323;
  border-color: #e9b9b9;
}

.warning-banner {
  border-left: 4px solid var(--accent);
  background: #fff3ec;
  color: #793c24;
  padding: 0.8rem 1rem;
  border-radius: 8px;
  margin: 1rem 0;
}

input,
select {
  accent-color: var(--primary);
}

select {
  min-height: 2.2rem;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: #fff;
  color: var(--text);
  padding: 0.25rem 0.55rem;
  font: inherit;
}