:root {
  --color-text: #1a1a1a;
  --color-muted: #5a5a5a;
  --color-border: #e5e5e5;
  --color-accent: #2a6cb4;
  --color-danger: #a32626;
  --color-danger-dark: #7c1919;
  --color-bg: #ffffff;
  --color-soft-bg: #f7f7f8;
  --color-warning-bg: #fff8e8;
  --color-warning-border: #e7c86d;
  --color-success-bg: #edf8f1;
  --color-success-border: #78b88e;
  --max-width: 720px;
  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
  font-family: var(--font-sans);
  color: var(--color-text);
  background: var(--color-bg);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

a { color: var(--color-accent); text-decoration: none; }
a:hover { text-decoration: underline; }

header {
  border-bottom: 1px solid var(--color-border);
  padding: 1.25rem 1.5rem;
}
.header-inner {
  max-width: var(--max-width);
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.logo-link {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  color: var(--color-text);
  font-weight: 600;
  font-size: 1.1rem;
}
.logo-link img { height: 28px; width: auto; }
.logo-link:hover { text-decoration: none; }
nav { display: flex; align-items: center; gap: 1.5rem; }
nav a { color: var(--color-text); font-size: 0.95rem; }
.lang-switcher {
  display: flex;
  gap: 0.4rem;
  font-size: 0.85rem;
  color: var(--color-muted);
}
.active-lang { font-weight: 700; color: var(--color-text); }

main {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 3rem 1.5rem 4rem;
}
h1 {
  font-size: 2rem;
  font-weight: 600;
  margin: 0 0 0.5rem;
  letter-spacing: -0.01em;
  border-bottom: 2px solid var(--color-border);
  padding-bottom: 0.5rem;
}
h2 {
  font-size: 1.25rem;
  font-weight: 600;
  margin: 2.5rem 0 0.75rem;
  letter-spacing: -0.005em;
}
p { margin: 0 0 1rem; }
ul, ol { padding-left: 1.5rem; margin-bottom: 1rem; }
li { margin-bottom: 0.5rem; }
strong { color: #000; }

.notice, .deletion-card, #deletion-status {
  border: 1px solid var(--color-border);
  border-radius: 10px;
  padding: 1rem 1.1rem;
  margin: 1.25rem 0;
  background: var(--color-soft-bg);
}
.notice.warning {
  background: var(--color-warning-bg);
  border-color: var(--color-warning-border);
}
.deletion-card { padding: 1.25rem; }
.deletion-card h2 { margin-top: 0; }
.account-label { margin-bottom: 0.75rem; }
.confirm-row {
  display: flex;
  align-items: flex-start;
  gap: 0.65rem;
  margin: 1rem 0;
}
.confirm-row input { margin-top: 0.38rem; flex: 0 0 auto; }
.button-row { display: flex; gap: 0.75rem; flex-wrap: wrap; }
button, .button-link {
  appearance: none;
  border: 1px solid var(--color-accent);
  border-radius: 8px;
  padding: 0.72rem 1rem;
  font: inherit;
  font-weight: 600;
  cursor: pointer;
  background: var(--color-accent);
  color: #fff;
  text-align: center;
}
button:hover:not(:disabled), .button-link:hover {
  filter: brightness(0.92);
  text-decoration: none;
}
button:focus-visible, .button-link:focus-visible, input:focus-visible {
  outline: 3px solid rgba(42, 108, 180, 0.35);
  outline-offset: 2px;
}
button:disabled { cursor: not-allowed; opacity: 0.55; }
button.secondary {
  color: var(--color-accent);
  background: #fff;
}
button.danger {
  border-color: var(--color-danger);
  background: var(--color-danger);
}
button.danger:hover:not(:disabled) { background: var(--color-danger-dark); }
#deletion-status[hidden], #account-panel[hidden] { display: none; }
#deletion-status[data-kind="warning"] {
  background: var(--color-warning-bg);
  border-color: var(--color-warning-border);
}
#deletion-status[data-kind="success"] {
  background: var(--color-success-bg);
  border-color: var(--color-success-border);
}
#deletion-status[data-kind="error"] {
  background: #fff0f0;
  border-color: #d58b8b;
}
.small { color: var(--color-muted); font-size: 0.92rem; }

footer {
  border-top: 1px solid var(--color-border);
  padding: 2rem 1.5rem;
  margin-top: 3rem;
}
.footer-inner {
  max-width: var(--max-width);
  margin: 0 auto;
  color: var(--color-muted);
  font-size: 0.875rem;
}
.footer-inner p { margin: 0 0 0.5rem; }
.footer-links {
  margin-top: 1rem;
  display: flex;
  gap: 1.5rem;
  flex-wrap: wrap;
}
.footer-links a { color: var(--color-muted); }

@media (max-width: 480px) {
  main { padding: 2rem 1.25rem 3rem; }
  h1 { font-size: 1.65rem; }
  nav { gap: 1rem; }
  .button-row { flex-direction: column; }
  button, .button-link { width: 100%; }
}