:root {
  --primary: #0381fe;
  --primary-hover: #0266d6;
  --bg: #f2f4f7;
  --surface: #ffffff;
  --surface-2: #f7f8fa;
  --text: #16181c;
  --text-secondary: #6a707a;
  --divider: #e6e8ec;
  --danger: #e5484d;
  --shadow: 0 2px 10px rgba(0,0,0,0.06);
  --header-height: 56px;
  --bottom-nav-height: 64px;
}

@media (prefers-color-scheme: dark) {
  :root {
    --primary: #4da3ff;
    --primary-hover: #6fb6ff;
    --bg: #0d0f12;
    --surface: #1a1d21;
    --surface-2: #22262b;
    --text: #f2f4f7;
    --text-secondary: #a4acb8;
    --divider: #2b2f36;
    --danger: #ff6b6f;
    --shadow: 0 2px 10px rgba(0,0,0,0.5);
  }
}

*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html { -webkit-text-size-adjust: 100%; }

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "Roboto", "Noto Sans JP", "Helvetica Neue", Arial, sans-serif;
  font-size: 16px;
  line-height: 1.5;
  color: var(--text);
  background-color: var(--bg);
  -webkit-font-smoothing: antialiased;
  min-height: 100vh;
}

body.app {
  padding-top: var(--header-height);
  padding-bottom: calc(var(--bottom-nav-height) + env(safe-area-inset-bottom, 0px));
}

/* ===== Header ===== */
.app-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: var(--header-height);
  background: var(--surface);
  color: var(--text);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 20px;
  z-index: 1000;
  border-bottom: 1px solid var(--divider);
}
.app-title {
  font-size: 1.35rem;
  font-weight: 700;
  letter-spacing: -0.02em;
}
.app-header-right {
  display: flex;
  align-items: center;
  gap: 12px;
}
.user-badge {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.85rem;
  color: var(--text-secondary);
  text-decoration: none;
}
.user-avatar {
  width: 32px;
  height: 32px;
  border-radius: 50%;
  background: var(--primary);
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 0.9rem;
}
.role-chip {
  font-size: 0.7rem;
  font-weight: 600;
  padding: 2px 10px;
  border-radius: 20px;
  background: var(--surface-2);
  color: var(--text-secondary);
}
.role-chip.admin { background: rgba(3,129,254,0.15); color: var(--primary); }

.icon-btn {
  background: none;
  border: none;
  color: var(--text-secondary);
  cursor: pointer;
  padding: 8px;
  border-radius: 50%;
  display: inline-flex;
  align-items: center;
  justify-content: center;
}
.icon-btn:hover { background: var(--surface-2); }

/* ===== Bottom Navigation ===== */
.bottom-nav {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  height: var(--bottom-nav-height);
  background: var(--surface);
  display: flex;
  justify-content: space-around;
  align-items: stretch;
  border-top: 1px solid var(--divider);
  z-index: 1000;
  padding-bottom: env(safe-area-inset-bottom, 0px);
}
.nav-item {
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 4px;
  color: var(--text-secondary);
  text-decoration: none;
  font-size: 0.7rem;
  font-weight: 500;
  transition: color 0.2s;
}
.nav-item.active { color: var(--primary); }
.nav-item .nav-icon { width: 26px; height: 26px; }
.nav-item.active .nav-icon { transform: scale(1.05); }

/* ===== Content ===== */
.content {
  max-width: 720px;
  margin: 0 auto;
  padding: 20px 16px 32px;
}
.page-title {
  font-size: 1.6rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  margin: 8px 4px 20px;
}
.section-label {
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--text-secondary);
  margin: 20px 8px 8px;
}

/* ===== Cards ===== */
.card {
  background: var(--surface);
  border-radius: 18px;
  padding: 22px;
  margin-bottom: 16px;
  box-shadow: var(--shadow);
}
.card-title {
  font-size: 1.1rem;
  font-weight: 700;
  margin-bottom: 12px;
}

/* ===== Buttons ===== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  width: 100%;
  padding: 15px 24px;
  border: none;
  border-radius: 26px;
  background: var(--primary);
  color: #fff;
  font-size: 1rem;
  font-weight: 600;
  cursor: pointer;
  text-align: center;
  text-decoration: none;
  transition: background 0.2s, opacity 0.15s, transform 0.05s;
}
.btn:hover { background: var(--primary-hover); }
.btn:active { transform: scale(0.985); }
.btn:disabled { opacity: 0.5; cursor: default; }
.btn-secondary {
  background: var(--surface-2);
  color: var(--primary);
}
.btn-secondary:hover { background: var(--divider); }
.btn-inline { width: auto; padding: 10px 22px; font-size: 0.9rem; }

/* ===== Form ===== */
.field { margin-bottom: 16px; }
.field-label {
  display: block;
  margin: 0 6px 8px;
  font-size: 0.85rem;
  font-weight: 500;
  color: var(--text-secondary);
}
input[type="text"],
input[type="email"],
input[type="password"],
input[type="search"],
input[type="url"],
input[type="number"],
textarea,
select {
  width: 100%;
  padding: 14px 18px;
  border: 1.5px solid var(--divider);
  border-radius: 18px;
  background: var(--surface-2);
  color: var(--text);
  font-size: 1rem;
  transition: border-color 0.15s, background 0.15s;
}
input:focus, textarea:focus, select:focus {
  outline: none;
  border-color: var(--primary);
  background: var(--surface);
}

/* ===== Toggle Switch ===== */
.toggle {
  display: inline-flex;
  align-items: center;
  cursor: pointer;
}
.toggle input { position: absolute; opacity: 0; width: 0; height: 0; }
.toggle .slider {
  position: relative;
  width: 52px;
  height: 32px;
  background: var(--divider);
  border-radius: 20px;
  transition: background 0.25s;
  flex-shrink: 0;
}
.toggle .slider::before {
  content: "";
  position: absolute;
  top: 3px;
  left: 3px;
  width: 26px;
  height: 26px;
  background: #fff;
  border-radius: 50%;
  box-shadow: 0 1px 3px rgba(0,0,0,0.3);
  transition: transform 0.25s;
}
.toggle input:checked + .slider { background: var(--primary); }
.toggle input:checked + .slider::before { transform: translateX(20px); }

/* ===== List rows ===== */
.list {
  background: var(--surface);
  border-radius: 18px;
  overflow: hidden;
  box-shadow: var(--shadow);
}
.list-item {
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 16px 20px;
  border-bottom: 1px solid var(--divider);
  color: var(--text);
  text-decoration: none;
  transition: background 0.15s;
}
.list-item:last-child { border-bottom: none; }
.list-item:hover { background: var(--surface-2); }
.list-item .li-body { flex: 1; min-width: 0; }
.list-item .li-title { font-weight: 500; }
.list-item .li-sub {
  font-size: 0.85rem;
  color: var(--text-secondary);
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}
.list-item .li-trailing {
  color: var(--text-secondary);
  font-size: 0.9rem;
}

.message {
  text-align: center;
  min-height: 22px;
  margin: 14px 0 4px;
  font-size: 0.9rem;
  color: var(--text-secondary);
}
.message.error { color: var(--danger); }
.message.success { color: var(--primary); }

/* ===== Toast ===== */
.toast-container {
  position: fixed;
  bottom: calc(var(--bottom-nav-height) + 16px);
  left: 50%;
  transform: translateX(-50%);
  z-index: 9999;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
  pointer-events: none;
  width: max-content;
  max-width: 90vw;
}
.toast {
  background: rgba(28,30,34,0.96);
  color: #fff;
  padding: 13px 24px;
  border-radius: 26px;
  font-size: 0.9rem;
  opacity: 0;
  transform: translateY(10px);
  transition: opacity 0.25s, transform 0.25s;
  box-shadow: 0 4px 16px rgba(0,0,0,0.35);
  text-align: center;
}
.toast.show { opacity: 1; transform: translateY(0); }

/* ===== Login page ===== */
body.login {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 100vh;
  padding: 24px;
}
.login-card {
  width: 100%;
  max-width: 420px;
  background: var(--surface);
  border-radius: 26px;
  padding: 40px 28px;
  box-shadow: var(--shadow);
}
.login-logo {
  width: 64px;
  height: 64px;
  border-radius: 20px;
  background: var(--primary);
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.6rem;
  font-weight: 800;
  margin: 0 auto 20px;
}
.login-title {
  font-size: 1.5rem;
  font-weight: 700;
  text-align: center;
  margin-bottom: 4px;
}
.login-subtitle {
  text-align: center;
  color: var(--text-secondary);
  font-size: 0.9rem;
  margin-bottom: 28px;
}
details.pw-login {
  margin-top: 22px;
  border-top: 1px solid var(--divider);
  padding-top: 18px;
}
details.pw-login > summary {
  list-style: none;
  cursor: pointer;
  color: var(--primary);
  font-weight: 600;
  font-size: 0.9rem;
  text-align: center;
  user-select: none;
}
details.pw-login > summary::-webkit-details-marker { display: none; }
details.pw-login[open] > summary { margin-bottom: 16px; }