:root {
  --accent: #d64545;
  --accent-dark: #a83232;
  --ink: #1f2430;
  --ink-soft: #5a6072;
  --bg: #f6f5f2;
  --surface: #ffffff;
  --border: #e2e0da;
  --header-bg: #1f2430;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: 'Segoe UI', Roboto, Arial, sans-serif;
  background: var(--bg);
  color: var(--ink);
}

.login-box {
  width: 100%;
  max-width: 340px;
  margin: 16px;
  padding: 28px 24px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 8px;
  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.08);
}
.login-box h1 { margin: 0 0 20px; font-size: 1.2rem; text-align: center; }

label { display: block; margin: 12px 0 4px; font-size: 0.85rem; color: var(--ink-soft); }

input {
  width: 100%;
  padding: 9px 10px;
  border: 1px solid var(--border);
  border-radius: 4px;
  font-size: 1rem;
}
input:focus { outline: 2px solid var(--accent); outline-offset: -1px; }

button {
  width: 100%;
  margin-top: 18px;
  padding: 10px;
  border: 0;
  border-radius: 4px;
  background: var(--accent);
  color: #fff;
  font-size: 1rem;
  cursor: pointer;
}
button:hover:not(:disabled) { background: var(--accent-dark); }
button:disabled { opacity: 0.6; cursor: default; }

.login-error {
  margin: 12px 0 0;
  padding: 8px 10px;
  background: #fde0e0;
  border: 1px solid var(--accent);
  border-radius: 4px;
  font-size: 0.85rem;
}
.login-error[hidden] { display: none; }

.hint { margin: 0 0 4px; font-size: 0.85rem; color: var(--ink-soft); text-align: center; }
.hint[hidden], #sp-form[hidden], #sp-done[hidden], #cp-done[hidden] { display: none; }

.btn-row { display: flex; gap: 8px; margin-top: 12px; }
.btn-row button { margin-top: 0; padding: 7px 4px; font-size: 0.85rem; }
button.btn-secondary { background: transparent; color: var(--ink); border: 1px solid var(--border); }
button.btn-secondary:hover:not(:disabled) { background: #f0efe9; border-color: var(--accent); }

.rules { list-style: none; margin: 12px 0 0; padding: 0; font-size: 0.85rem; color: var(--ink-soft); }
.rules li::before { content: '○ '; }
.rules li.ok { color: #2e7d46; }
.rules li.ok::before { content: '✔ '; }

.login-ok {
  margin: 0 0 12px; padding: 8px 10px; text-align: center;
  background: #e7f5e9; border: 1px solid #8fbf9a; border-radius: 4px; font-size: 0.9rem;
}
.login-ok[hidden] { display: none; }

.link-btn { display: block; margin-top: 16px; text-align: center; font-size: 0.9rem; color: var(--accent-dark); }