:root {
  --bg: #f3f4f6;
  --card: #ffffff;
  --text: #1f2937;
  --muted: #6b7280;
  --primary: #305496;
  --primary-hover: #264478;
  --border: #d1d5db;
  --error: #b91c1c;
  --ok: #15803d;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  font-family: system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  color: var(--text);
  background: var(--bg);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: flex-start;
  padding: 96px 16px 64px;
}

.topbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: 56px;
  background: var(--primary);
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 20px;
}

.topbar__title {
  font-weight: 600;
}

.link-btn {
  background: transparent;
  border: 1px solid rgba(255, 255, 255, 0.6);
  color: #fff;
  padding: 6px 14px;
  border-radius: 6px;
  cursor: pointer;
}

.link-btn:hover {
  background: rgba(255, 255, 255, 0.12);
}

.card {
  background: var(--card);
  width: 100%;
  max-width: 360px;
  padding: 28px;
  border-radius: 12px;
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.08);
}

h1 {
  margin: 0;
  font-size: 20px;
}

form {
  display: flex;
  flex-direction: column;
  gap: 14px;
  padding-top: 20px;
}

label {
  display: flex;
  flex-direction: column;
  gap: 6px;
  font-size: 14px;
  color: var(--muted);
}

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

input[type="text"],
input[type="password"],
input[type="date"],
input[type="time"] {
  padding: 10px 12px;
  border: 1px solid var(--border);
  border-radius: 8px;
  font-size: 15px;
  color: var(--text);
}

input:focus {
  outline: 2px solid var(--primary);
  outline-offset: 1px;
}

input[type="checkbox"] {
  width: 16px;
  height: 16px;
}

button[type="submit"] {
  padding: 11px 16px;
  border: none;
  border-radius: 8px;
  background: var(--primary);
  color: #fff;
  font-size: 15px;
  font-weight: 600;
  cursor: pointer;
}

button[type="submit"]:hover {
  background: var(--primary-hover);
}

button[type="submit"]:disabled {
  opacity: 0.6;
  cursor: default;
}

.msg {
  margin: 0;
  font-size: 14px;
}

.hint {
  margin: 0;
  font-size: 13px;
  line-height: 1.4;
  color: var(--muted);
}

.msg.error {
  color: var(--error);
}

.msg.ok {
  color: var(--ok);
}

.site-footer {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  padding: 14px;
  text-align: center;
  font-size: 13px;
  color: var(--muted);
}

.site-footer a {
  color: var(--primary);
  text-decoration: none;
  font-weight: 500;
}

.site-footer a:hover {
  text-decoration: underline;
}