:root {
  --bg: #f4f6f8;
  --panel: #ffffff;
  --text: #1f2933;
  --muted: #6b7684;
  --accent: #2f6fed;
  --accent-dark: #2457c4;
  --danger: #c0392b;
  --border: #d6dde3;
  --warn: #b7791f;
  --header-bg: #1f2933;
  --nav-link: #dbe4ee;
  --nav-link-hover: #ffffff;
  --brand: #ffffff;
  --th-bg: #edf1f5;
  --input-bg: #fdfdfd;
  --flash-bg: #e8f4fd;
  --flash-border: #b8dcf8;
  --flash-text: #155a8a;
  --flash-error-bg: #fdeeee;
  --flash-error-border: #f3c1c1;
  --flash-error-text: #8f2b23;
}

[data-theme="dark"] {
  --bg: #14181d;
  --panel: #1e242c;
  --text: #e6ebf0;
  --muted: #9aa7b4;
  --accent: #5b8def;
  --accent-dark: #7aa4f2;
  --danger: #e05d4c;
  --border: #333d47;
  --warn: #e0a94e;
  --header-bg: #0f1318;
  --nav-link: #b9c6d4;
  --nav-link-hover: #ffffff;
  --brand: #ffffff;
  --th-bg: #232b34;
  --input-bg: #1a2027;
  --flash-bg: #1d2b38;
  --flash-border: #2f4d66;
  --flash-text: #9cc7ea;
  --flash-error-bg: #3a2323;
  --flash-error-border: #6b3030;
  --flash-error-text: #f0a8a0;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: -apple-system, "Segoe UI", Roboto, Arial, sans-serif;
  background: var(--bg);
  color: var(--text);
}

header {
  background: var(--header-bg);
}

nav {
  max-width: 1000px;
  margin: 0 auto;
  padding: 0 16px;
  display: flex;
  align-items: center;
  gap: 18px;
  flex-wrap: wrap;
}

nav a {
  color: var(--nav-link);
  text-decoration: none;
  padding: 14px 0;
  font-size: 14px;
}

nav a:hover {
  color: var(--nav-link-hover);
}

nav .brand {
  font-weight: 700;
  color: var(--brand);
  font-size: 16px;
  margin-right: 12px;
}

.nav-user {
  margin-left: auto;
  color: var(--nav-link);
  font-size: 13px;
}

.theme-toggle {
  background: transparent;
  border: 1px solid var(--border);
  border-radius: 6px;
  color: var(--nav-link);
  padding: 5px 10px;
  font-size: 13px;
  cursor: pointer;
}

.theme-toggle:hover {
  color: var(--nav-link-hover);
  border-color: var(--nav-link);
}

main {
  max-width: 1000px;
  margin: 0 auto;
  padding: 24px 16px 48px;
}

h1 {
  font-size: 24px;
  margin: 0 0 16px;
}

h2 {
  font-size: 18px;
  margin: 28px 0 10px;
}

table {
  width: 100%;
  border-collapse: collapse;
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 8px;
  overflow: hidden;
  margin: 8px 0 20px;
}

th,
td {
  text-align: left;
  padding: 10px 12px;
  border-bottom: 1px solid var(--border);
  font-size: 14px;
}

th {
  background: var(--th-bg);
  font-weight: 600;
}

tr:last-child td {
  border-bottom: none;
}

.cards {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 14px;
  margin-bottom: 8px;
}

.card {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 16px;
}

.card-label {
  color: var(--muted);
  font-size: 13px;
}

.card-value {
  font-size: 24px;
  font-weight: 700;
  margin: 6px 0;
}

.card-note {
  color: var(--muted);
  font-size: 13px;
}

.card-warn .card-value {
  color: var(--warn);
}

form.form,
form.login-form {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 20px;
  max-width: 560px;
}

form.login-form {
  max-width: 360px;
}

label {
  display: block;
  font-size: 14px;
  margin: 12px 0 4px;
  color: var(--muted);
}

label.checkbox-row {
  color: var(--text);
  margin: 10px 0;
  display: flex;
  align-items: center;
  gap: 8px;
}

input,
select,
textarea {
  width: 100%;
  padding: 8px 10px;
  border: 1px solid var(--border);
  border-radius: 6px;
  font-size: 14px;
  font-family: inherit;
  background: var(--input-bg);
}

input[type="checkbox"] {
  width: auto;
}

textarea {
  resize: vertical;
}

.btn {
  display: inline-block;
  background: var(--accent);
  color: #ffffff;
  border: none;
  border-radius: 6px;
  padding: 8px 14px;
  font-size: 14px;
  cursor: pointer;
  margin-top: 14px;
  text-decoration: none;
}

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

.btn-danger {
  background: transparent;
  color: var(--danger);
  margin-top: 0;
  padding: 4px 8px;
}

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

form.inline {
  display: inline;
}

form.inline .btn {
  margin: 0 6px 0 0;
  padding: 4px 10px;
}

.link {
  color: var(--accent);
  text-decoration: none;
  margin: 0 6px;
}

.link:hover {
  text-decoration: underline;
}

.flash {
  background: var(--flash-bg);
  border: 1px solid var(--flash-border);
  color: var(--flash-text);
  border-radius: 8px;
  padding: 10px 14px;
  margin-bottom: 14px;
}

.flash.error {
  background: var(--flash-error-bg);
  border-color: var(--flash-error-border);
  color: var(--flash-error-text);
}