:root {
  --color-bg: #EEF0EA;
  --color-surface: #FFFFFF;
  --color-ink: #23291F;
  --color-ink-soft: #6E7568;
  --color-accent: #4A6B5A;
  --color-accent-hover: #3A5548;
  --color-accent-soft: #E3E7DC;
  --color-danger: #A24B3E;
  --color-danger-soft: #F3E4E1;
  --color-border: #DEE2D6;
  --font-display: "Shippori Mincho", serif;
  --font-body: -apple-system, BlinkMacSystemFont, "Hiragino Sans",
    "Hiragino Kaku Gothic ProN", "Yu Gothic", sans-serif;
  --font-mono: ui-monospace, "SF Mono", "SFMono-Regular", Consolas, monospace;
  --radius: 12px;
  --shadow-card: 0 1px 2px rgba(35, 41, 31, 0.06), 0 2px 8px rgba(35, 41, 31, 0.05);
  --shadow-focus: 0 0 0 3px rgba(74, 107, 90, 0.25);
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  background: var(--color-bg);
  color: var(--color-ink);
  font-family: var(--font-body);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

button, input, textarea {
  font: inherit;
}

button:focus-visible,
input:focus-visible,
textarea:focus-visible {
  outline: 2px solid var(--color-accent);
  outline-offset: 2px;
}

/* ===== ログイン画面 ===== */
.login-view {
  min-height: 100vh;
  min-height: 100dvh;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 28px;
  padding: 24px;
}

.login-view.is-hidden {
  display: none;
}

.login-brand {
  text-align: center;
}

.login-brand h1 {
  font-family: var(--font-display);
  font-size: 34px;
  font-weight: 500;
  margin: 0;
  letter-spacing: 0.04em;
}

.login-brand p {
  margin: 6px 0 0;
  color: var(--color-ink-soft);
  font-size: 13px;
  letter-spacing: 0.02em;
}

.login-card {
  width: 100%;
  max-width: 320px;
  background: var(--color-surface);
  border-radius: var(--radius);
  box-shadow: var(--shadow-card);
  padding: 24px;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.field {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.field label {
  font-size: 12px;
  color: var(--color-ink-soft);
}

input[type="email"],
input[type="password"],
textarea {
  font-size: 15px;
  color: var(--color-ink);
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: 8px;
  padding: 10px 12px;
  outline: none;
  transition: box-shadow 0.15s ease, border-color 0.15s ease;
}

input[type="email"]:focus,
input[type="password"]:focus {
  border-color: var(--color-accent);
  box-shadow: var(--shadow-focus);
}

.btn {
  font-size: 14px;
  font-weight: 600;
  border: none;
  border-radius: 8px;
  padding: 10px 18px;
  cursor: pointer;
  transition: background-color 0.15s ease, transform 0.05s ease;
}

.btn:active {
  transform: scale(0.98);
}

.btn-primary {
  background: var(--color-accent);
  color: #fff;
}

.btn-primary:hover {
  background: var(--color-accent-hover);
}

.btn-text {
  background: transparent;
  color: var(--color-ink-soft);
  padding: 6px 8px;
}

.btn-text:hover {
  color: var(--color-ink);
}

.login-error {
  font-size: 12px;
  color: var(--color-danger);
  min-height: 16px;
  margin: 0;
}

/* ===== アプリ画面 ===== */
.app-view {
  display: none;
}

.app-view.is-visible {
  display: block;
}

.app-shell {
  max-width: 640px;
  margin: 0 auto;
  padding: 0 20px 40px;
}

.app-header {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  padding: 28px 0 18px;
}

.app-header h1 {
  font-family: var(--font-display);
  font-size: 24px;
  font-weight: 500;
  margin: 0;
  letter-spacing: 0.04em;
}

.tabs {
  display: flex;
  border-bottom: 1px solid var(--color-border);
  margin-bottom: 20px;
}

.tab {
  background: transparent;
  border: none;
  border-bottom: 2px solid transparent;
  color: var(--color-ink-soft);
  font-size: 14px;
  font-weight: 600;
  padding: 10px 4px;
  margin-right: 20px;
  cursor: pointer;
}

.tab.is-active {
  color: var(--color-ink);
  border-bottom-color: var(--color-accent);
}

.composer {
  background: var(--color-surface);
  border-radius: var(--radius);
  box-shadow: var(--shadow-card);
  padding: 14px;
  display: flex;
  flex-direction: column;
  gap: 10px;
  margin-bottom: 24px;
}

.composer textarea {
  resize: vertical;
  min-height: 64px;
  border: none;
  background: transparent;
  padding: 4px;
}

.composer textarea:focus {
  box-shadow: none;
}

.composer-actions {
  display: flex;
  justify-content: flex-end;
}

.memo-list {
  display: flex;
  flex-direction: column;
  gap: 12px;
  list-style: none;
  margin: 0;
  padding: 0;
}

.memo-card {
  background: var(--color-surface);
  border-radius: var(--radius);
  box-shadow: var(--shadow-card);
  padding: 14px;
  animation: fade-in 0.25s ease;
}

@keyframes fade-in {
  from {
    opacity: 0;
    transform: translateY(4px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.memo-meta {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 8px;
}

.memo-stamp-wrap {
  display: flex;
  align-items: center;
  gap: 6px;
}

.memo-stamp {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.03em;
  color: var(--color-ink-soft);
  background: var(--color-accent-soft);
  padding: 3px 8px;
  border-radius: 999px;
}

.pin-badge {
  font-size: 12px;
}

.memo-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 2px;
}

.icon-btn {
  border: none;
  background: transparent;
  color: var(--color-ink-soft);
  cursor: pointer;
  padding: 4px 7px;
  border-radius: 6px;
  font-size: 14px;
  line-height: 1;
}

.icon-btn:hover {
  background: var(--color-accent-soft);
  color: var(--color-ink);
}

.icon-btn.danger:hover {
  background: var(--color-danger-soft);
  color: var(--color-danger);
}

.memo-text {
  white-space: pre-wrap;
  word-break: break-word;
  font-size: 15px;
  margin: 0;
  cursor: text;
}

.memo-text.is-completed {
  text-decoration: line-through;
  color: var(--color-ink-soft);
}

.memo-edit-area {
  width: 100%;
  min-height: 60px;
}

.memo-edit-actions {
  display: flex;
  justify-content: flex-end;
  gap: 8px;
  margin-top: 8px;
}

.empty-state {
  text-align: center;
  color: var(--color-ink-soft);
  font-size: 13px;
  padding: 40px 0;
}

@media (prefers-reduced-motion: reduce) {
  .memo-card {
    animation: none;
  }
  .btn,
  .icon-btn {
    transition: none;
  }
}

@media (max-width: 400px) {
  .app-shell {
    padding: 0 14px 32px;
  }
  .login-brand h1 {
    font-size: 28px;
  }
}