:root {
  --bg: #f6f3ee;
  --card: #ffffff;
  --ink: #1f2933;
  --accent: #1b7f79;
  --accent-2: #1b3a57;
  --muted: #6b7c85;
  --border: #e0ded9;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: "Avenir Next", "PingFang TC", "Noto Sans TC", sans-serif;
  color: var(--ink);
  background: radial-gradient(circle at 10% 20%, #fff7e6, transparent 40%),
              radial-gradient(circle at 90% 10%, #e9f7f7, transparent 45%),
              var(--bg);
}

.app-shell {
  display: none;
  min-height: 100vh;
}

.login-screen {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 24px;
}

.login-card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 18px;
  padding: 28px;
  width: min(420px, 100%);
  box-shadow: 0 18px 50px rgba(0,0,0,0.1);
}

.login-card h1 {
  margin-top: 0;
  color: var(--accent-2);
}

.login-card p {
  color: var(--muted);
  margin-top: 0;
}

.sidebar {
  width: 260px;
  background: #102a2b;
  color: #f8f5f0;
  padding: 24px 18px;
  display: flex;
  flex-direction: column;
  gap: 22px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 12px;
}

.logo {
  width: 44px;
  height: 44px;
  border-radius: 14px;
  background: #1b7f79;
  color: #fff;
  display: grid;
  place-items: center;
  font-weight: 700;
  font-size: 20px;
}

.title {
  font-weight: 700;
}

.subtitle {
  font-size: 12px;
  color: rgba(255,255,255,0.7);
}

.menu {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.menu-item {
  border: none;
  background: transparent;
  color: inherit;
  text-align: left;
  padding: 10px 12px;
  border-radius: 10px;
  cursor: pointer;
}

.menu-item.active,
.menu-item:hover {
  background: rgba(255,255,255,0.12);
}

.sidebar-footer {
  margin-top: auto;
  display: flex;
  flex-direction: column;
  gap: 10px;
  font-size: 13px;
  color: rgba(255,255,255,0.7);
}

.ghost {
  border: 1px solid rgba(255,255,255,0.4);
  background: transparent;
  color: #fff;
}

.content {
  flex: 1;
  padding: 32px 28px 60px;
}

.hero {
  margin-bottom: 24px;
}

.hero h1 {
  font-size: 32px;
  margin: 0 0 6px;
  color: var(--accent-2);
}

.hero p {
  margin: 0;
  color: var(--muted);
}

.card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 20px;
  margin: 18px 0;
  box-shadow: 0 10px 30px rgba(0,0,0,0.05);
}

.card h2 {
  margin-top: 0;
}

.grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 12px;
  margin-bottom: 12px;
}

label {
  display: flex;
  flex-direction: column;
  font-size: 14px;
  color: var(--muted);
  gap: 6px;
}

input, select {
  padding: 10px 12px;
  border: 1px solid var(--border);
  border-radius: 10px;
  font-size: 14px;
  background: #fff;
}

button {
  border: none;
  padding: 10px 16px;
  border-radius: 10px;
  background: var(--accent-2);
  color: #fff;
  cursor: pointer;
  margin-right: 8px;
}

button.primary {
  background: var(--accent);
}

button:hover {
  opacity: 0.92;
}

.result {
  background: #f4f6f8;
  border: 1px dashed var(--border);
  padding: 12px;
  border-radius: 10px;
  min-height: 60px;
}

.status {
  margin-top: 8px;
  color: var(--muted);
}

.panel.hidden {
  display: none;
}

@media (max-width: 600px) {
  .app-shell {
    flex-direction: column;
  }
  .sidebar {
    width: 100%;
    flex-direction: row;
    flex-wrap: wrap;
    gap: 12px;
  }
  .content { padding: 20px 12px 40px; }
  button { width: 100%; margin: 6px 0; }
}