:root {
  --color-bg: #f4f5f7;
  --color-panel: #ffffff;
  --color-border: #dcdfe4;
  --color-primary: #2563eb;
  --color-primary-dark: #1d4ed8;
  --color-text: #1f2430;
  --color-muted: #6b7280;
  --color-danger: #dc2626;
  font-family: -apple-system, "Segoe UI", "Hiragino Kaku Gothic ProN", "Yu Gothic", sans-serif;
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  height: 100%;
  background: var(--color-bg);
  color: var(--color-text);
}

.screen { height: 100%; }
.hidden { display: none !important; }

/* ログイン画面 */
#login-screen {
  display: flex;
  align-items: center;
  justify-content: center;
}

.login-form {
  background: var(--color-panel);
  border: 1px solid var(--color-border);
  border-radius: 12px;
  padding: 32px;
  width: 320px;
  display: flex;
  flex-direction: column;
  gap: 14px;
  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.06);
}

.login-form h1 {
  font-size: 18px;
  margin: 0 0 8px;
  text-align: center;
}

.login-form label {
  display: flex;
  flex-direction: column;
  gap: 4px;
  font-size: 13px;
  color: var(--color-muted);
}

.login-form input {
  padding: 8px 10px;
  border: 1px solid var(--color-border);
  border-radius: 6px;
  font-size: 14px;
}

.login-form button {
  margin-top: 8px;
  padding: 10px;
  border: none;
  border-radius: 6px;
  background: var(--color-primary);
  color: white;
  font-size: 14px;
  cursor: pointer;
}

.login-form button:hover { background: var(--color-primary-dark); }

.error-text {
  color: var(--color-danger);
  font-size: 13px;
  min-height: 1em;
  margin: 0;
}

/* メイン画面 */
#main-screen {
  display: flex;
  flex-direction: column;
}

.app-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 10px 16px;
  background: var(--color-panel);
  border-bottom: 1px solid var(--color-border);
}

.app-header h1 { font-size: 16px; margin: 0; }

.header-right {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 13px;
  color: var(--color-muted);
}

.header-right button {
  padding: 6px 12px;
  border: 1px solid var(--color-border);
  border-radius: 6px;
  background: white;
  cursor: pointer;
}

.app-body {
  flex: 1;
  display: flex;
  min-height: 0;
}

.sidebar {
  width: 320px;
  overflow-y: auto;
  background: var(--color-panel);
  border-right: 1px solid var(--color-border);
  padding: 12px;
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.panel {
  border: 1px solid var(--color-border);
  border-radius: 8px;
  padding: 12px;
}

.panel h2 {
  font-size: 13px;
  margin: 0 0 8px;
  color: var(--color-muted);
}

#map {
  flex: 1;
  min-width: 0;
}

.vehicle-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.vehicle-list li {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 6px 8px;
  border-radius: 6px;
  cursor: pointer;
  font-size: 13px;
}

.vehicle-list li:hover { background: var(--color-bg); }
.vehicle-list li.selected { background: #e8edfc; }

.vehicle-dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  flex: none;
}

.vehicle-name { font-weight: 600; }
.vehicle-time { color: var(--color-muted); font-size: 11px; margin-left: auto; }
.vehicle-offline { color: var(--color-muted); font-size: 11px; }

.message-target select,
.history-form select,
.history-form input {
  width: 100%;
  padding: 6px 8px;
  border: 1px solid var(--color-border);
  border-radius: 6px;
  font-size: 13px;
}

.message-target { margin-bottom: 8px; }
.message-target label,
.history-form label {
  display: flex;
  flex-direction: column;
  gap: 4px;
  font-size: 12px;
  color: var(--color-muted);
  margin-bottom: 8px;
}

.message-log {
  list-style: none;
  margin: 0 0 8px;
  padding: 0;
  max-height: 180px;
  overflow-y: auto;
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.message-log li {
  font-size: 12px;
  padding: 6px 8px;
  border-radius: 6px;
  background: var(--color-bg);
}

.message-log li .meta {
  color: var(--color-muted);
  font-size: 11px;
  display: block;
  margin-top: 2px;
}

.message-form {
  display: flex;
  gap: 6px;
}

.message-form input {
  flex: 1;
  padding: 6px 8px;
  border: 1px solid var(--color-border);
  border-radius: 6px;
  font-size: 13px;
}

.message-form button,
.history-buttons button {
  padding: 6px 10px;
  border: none;
  border-radius: 6px;
  background: var(--color-primary);
  color: white;
  font-size: 13px;
  cursor: pointer;
}

.history-buttons {
  display: flex;
  gap: 6px;
  flex-wrap: wrap;
}

.history-buttons button:hover,
.message-form button:hover { background: var(--color-primary-dark); }

.status-text {
  font-size: 12px;
  color: var(--color-muted);
  margin: 4px 0 0;
}

.car-icon {
  display: flex;
  align-items: center;
  justify-content: center;
  filter: drop-shadow(0 1px 2px rgba(0, 0, 0, 0.35));
}

.leaflet-control-attribution { font-size: 11px; }