:root {
  --bg-main: #f5f6fa;
  --card-bg: #fff;
  --primary: #6C63FF;
  --secondary: #48B6A3;
  --text-main: #222;
  --border-radius: 22px;
  --shadow: 0 8px 32px 0 rgba(31, 38, 135, 0.10);
  --btn-radius: 28px;
  --btn-font: 1.15em;
}

body {
  background: var(--bg-main);
  font-family: 'Segoe UI', 'Hiragino Sans', 'Meiryo', sans-serif;
  color: var(--text-main);
  margin: 0;
  min-height: 100vh;
}
header, footer {
  background: var(--card-bg);
  box-shadow: var(--shadow);
  border-radius: var(--border-radius);
  margin: 12px auto;
  max-width: 420px;
  text-align: center;
  padding: 1em 0.5em;
}
.site-logo {
  font-size: 2em;
  letter-spacing: 0.1em;
  font-weight: bold;
  color: var(--primary);
}
main {
  display: flex;
  flex-direction: column;
  align-items: center;
  min-height: 70vh;
  margin-top: 1em;
}

.card {
  background: var(--card-bg);
  border-radius: var(--border-radius);
  box-shadow: var(--shadow);
  max-width: 420px;
  width: 100%;
  margin: 1.2em auto;
  padding: 2em 1.5em;
  text-align: center;
}

.style-btn, .btn-primary, .btn {
  display: block;
  width: 92%;
  margin: 0.7em auto;
  background: var(--primary);
  color: #fff;
  border: none;
  border-radius: var(--btn-radius);
  font-size: var(--btn-font);
  padding: 1em 0;
  cursor: pointer;
  transition: background 0.2s, box-shadow 0.2s;
  box-shadow: 0 2px 12px #6c63ff33;
  text-decoration: none;
  text-align: center;
}

.style-btn:hover, .btn-primary:hover, .btn:hover {
  background: var(--secondary);
}

input, textarea, select {
  width: 90%;
  margin: 0.6em auto 1.2em auto;
  padding: 0.8em;
  border-radius: var(--btn-radius);
  border: 1.5px solid #eee;
  font-size: 1em;
  background: #fafbff;
  box-sizing: border-box;
  display: block;
}

table {
  width: 100%;
  border-collapse: separate;
  border-spacing: 0 0.5em;
  margin: 1em 0;
}
th, td {
  background: var(--card-bg);
  border-radius: 12px;
  padding: 1em 0.5em;
  text-align: center;
  font-size: 1em;
}
th {
  color: var(--primary);
  font-weight: bold;
  border-bottom: 2px solid #eee;
}
tr {
  box-shadow: 0 2px 12px #ddd3;
}
@media (max-width:600px) {
  .card, header, footer { max-width: 98vw; }
  table, th, td { font-size: 0.95em; }
}
.login-error { color: #c00; margin-bottom: 1em; }