:root {
  --bg: #f3efe6;
  --ink: #1c1a16;
  --muted: #5c574e;
  --panel: #fffdf8;
  --line: #d9d2c5;
  --accent: #0f6a5a;
  --accent-ink: #f7fffc;
  --accent-soft: #e7f2ee;
  --danger: #8a2f2f;
  --mono: "IBM Plex Mono", "Source Code Pro", "Consolas", monospace;
  --sans: "IBM Plex Sans JP", "Hiragino Sans", "Noto Sans JP", sans-serif;
}

* {
  box-sizing: border-box;
}

/* display 指定があっても hidden 属性を必ず優先させる */
[hidden] {
  display: none !important;
}

html,
body {
  margin: 0;
  min-height: 100%;
}

body {
  color: var(--ink);
  background:
    radial-gradient(1200px 500px at 10% -10%, #e7f2ee 0%, transparent 55%),
    radial-gradient(900px 400px at 100% 0%, #efe6d8 0%, transparent 50%),
    var(--bg);
  font-family: var(--sans);
}

.top {
  padding: 1.25rem 1.5rem 0.75rem;
}

.header-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 1rem;
}

.top h1 {
  margin: 0;
  font-size: 1.6rem;
  letter-spacing: 0.04em;
}

.sub {
  margin: 0.25rem 0 0.9rem;
  color: var(--muted);
}

.user-bar {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.user-badge {
  font-size: 0.88rem;
  font-weight: 500;
  color: var(--accent);
  background: var(--accent-soft);
  border: 1px solid color-mix(in srgb, var(--accent) 30%, transparent);
  padding: 0.25rem 0.6rem;
  border-radius: 0.35rem;
}

.btn-sm {
  padding: 0.25rem 0.65rem;
  font-size: 0.85rem;
}

.guest-notice {
  font-size: 0.85rem;
  color: var(--muted);
  background: #fdf6ec;
  border: 1px solid #faecd8;
  padding: 0.25rem 0.6rem;
  border-radius: 0.35rem;
}

.actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.6rem;
  align-items: center;
}

button {
  appearance: none;
  border: 1px solid var(--accent);
  background: var(--accent);
  color: var(--accent-ink);
  border-radius: 0.4rem;
  padding: 0.45rem 0.9rem;
  font: inherit;
  cursor: pointer;
}

button.secondary {
  background: transparent;
  color: var(--accent);
}

button:disabled {
  opacity: 0.5;
  cursor: wait;
}

.status {
  color: var(--muted);
  font-size: 0.92rem;
}

.status.error {
  color: var(--danger);
}

/* ログインフォーム */
.login-container {
  display: flex;
  justify-content: center;
  align-items: center;
  padding: 3rem 1.5rem;
  min-height: calc(100vh - 12rem);
}

.login-card {
  width: 100%;
  max-width: 400px;
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 0.75rem;
  padding: 2rem;
  box-shadow: 0 4px 18px rgba(0, 0, 0, 0.04);
}

.login-card h2 {
  margin: 0 0 0.5rem;
  font-size: 1.4rem;
}

.login-desc {
  margin: 0 0 1.5rem;
  color: var(--muted);
  font-size: 0.9rem;
  line-height: 1.4;
}

.form-group {
  margin-bottom: 1.2rem;
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
}

.form-group label {
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--muted);
}

.form-group input,
.form-group select {
  width: 100%;
  padding: 0.6rem 0.8rem;
  border: 1px solid var(--line);
  border-radius: 0.45rem;
  background: #fff;
  font-family: var(--sans);
  font-size: 0.95rem;
  color: var(--ink);
}

.form-group input:focus,
.form-group select:focus {
  outline: 2px solid color-mix(in srgb, var(--accent) 45%, white);
  outline-offset: 1px;
}

.login-error {
  color: var(--danger);
  font-size: 0.88rem;
  margin: 0 0 1rem;
  padding: 0.5rem 0.75rem;
  background: #fdf0f0;
  border-radius: 0.35rem;
  border: 1px solid #f8d7d7;
}

.login-card button[type="submit"] {
  width: 100%;
  padding: 0.65rem;
  font-size: 1rem;
}

/* メインペイン */
.panes {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1rem;
  padding: 0.5rem 1.5rem 1.5rem;
  min-height: calc(100vh - 9rem);
}

.pane {
  display: flex;
  flex-direction: column;
  gap: 0.45rem;
  min-height: 0;
}

.pane label {
  font-size: 0.9rem;
  color: var(--muted);
}

textarea {
  flex: 1;
  min-height: 22rem;
  width: 100%;
  resize: vertical;
  border: 1px solid var(--line);
  border-radius: 0.55rem;
  background: var(--panel);
  color: var(--ink);
  padding: 0.9rem 1rem;
  font-family: var(--mono);
  font-size: 0.98rem;
  line-height: 1.55;
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.7);
}

textarea:focus {
  outline: 2px solid color-mix(in srgb, var(--accent) 45%, white);
  outline-offset: 1px;
}

.meta {
  padding: 0 1.5rem 1.25rem;
  color: var(--muted);
  font-size: 0.85rem;
}

@media (max-width: 860px) {
  .panes {
    grid-template-columns: 1fr;
    min-height: auto;
  }

  textarea {
    min-height: 14rem;
  }

  .header-header {
    flex-direction: column;
  }
}