:root {
  --bg: #f4f7f2;
  --panel: #ffffff;
  --ink: #173428;
  --muted: #4d6a5c;
  --brand: #0f766e;
  --brand-2: #eab308;
  --danger: #b91c1c;
  --ok: #166534;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: "Noto Sans TC", sans-serif;
  color: var(--ink);
  background:
    radial-gradient(circle at 10% 10%, #dff7ee 0%, transparent 40%),
    radial-gradient(circle at 85% 20%, #fef3c7 0%, transparent 35%),
    var(--bg);
}

.site-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 16px 24px;
  background: rgba(255, 255, 255, 0.86);
  backdrop-filter: blur(6px);
  border-bottom: 1px solid #d7e3db;
}

.site-header nav a {
  margin-left: 14px;
  color: var(--ink);
  text-decoration: none;
  font-weight: 600;
}

.brand {
  font-weight: 700;
  letter-spacing: 0.4px;
}

.container {
  max-width: 1200px;
  margin: 24px auto;
  padding: 0 16px 28px;
}

.hero {
  background: linear-gradient(135deg, #0f766e, #115e59);
  color: white;
  border-radius: 16px;
  padding: 28px;
}

.card {
  background: var(--panel);
  border-radius: 14px;
  padding: 18px;
  border: 1px solid #d8e5dd;
  box-shadow: 0 10px 24px rgba(23, 52, 40, 0.08);
}

.grid-chat,
.grid-dashboard {
  display: grid;
  grid-template-columns: 1fr;
  gap: 16px;
}

@media (min-width: 1024px) {
  .grid-chat {
    grid-template-columns: 1fr 1.2fr;
  }
  .grid-dashboard {
    grid-template-columns: 1fr 1fr;
  }
}

textarea,
input {
  width: 100%;
  margin-top: 8px;
  margin-bottom: 12px;
  padding: 10px 12px;
  border-radius: 10px;
  border: 1px solid #bdd3c5;
  font-size: 15px;
}

.btn {
  display: inline-block;
  border: none;
  cursor: pointer;
  padding: 10px 14px;
  border-radius: 10px;
  background: var(--brand);
  color: white;
  text-decoration: none;
  font-weight: 600;
}

.btn.secondary {
  background: #14532d;
}

.btn.ghost {
  background: white;
  color: var(--brand);
  border: 1px solid var(--brand);
}

.btn-row {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 10px;
}

.status-badge {
  display: inline-block;
  margin: 2px 0 10px;
  padding: 6px 10px;
  border-radius: 999px;
  font-size: 13px;
  font-weight: 700;
}

.status-online {
  background: #dcfce7;
  color: #166534;
  border: 1px solid #86efac;
}

.status-offline {
  background: #fef3c7;
  color: #92400e;
  border: 1px solid #fcd34d;
}

.progress-wrap {
  margin-top: 12px;
}

.progress-head {
  display: flex;
  justify-content: space-between;
  margin-bottom: 6px;
  font-size: 14px;
  color: var(--muted);
}

.progress-track {
  width: 100%;
  height: 10px;
  border-radius: 999px;
  background: #d9e8de;
  overflow: hidden;
}

.progress-bar {
  width: 0%;
  height: 100%;
  border-radius: 999px;
  background: linear-gradient(90deg, #0f766e, #16a34a);
  transition: width 180ms ease;
}

.code-block {
  font-family: "Fira Code", monospace;
  background: #0f172a;
  color: #e2e8f0;
  border-radius: 10px;
  padding: 12px;
  overflow: auto;
  min-height: 160px;
}

.output {
  white-space: pre-wrap;
  line-height: 1.6;
  color: var(--muted);
}

.output-list {
  padding-left: 18px;
}

.error-text {
  margin-top: 10px;
  color: var(--danger);
}

.flash-wrap {
  margin-bottom: 16px;
}

.flash {
  margin-bottom: 8px;
  padding: 10px;
  border-radius: 8px;
}

.flash.error {
  background: #fee2e2;
  color: var(--danger);
}

.flash.success {
  background: #dcfce7;
  color: var(--ok);
}

.recent-item {
  border-top: 1px solid #e3ece6;
  padding: 10px 0;
}

/* ─────────────────────────────────────────────
   RWD — 平板 (640px – 1023px)
───────────────────────────────────────────── */
@media (min-width: 640px) and (max-width: 1023px) {
  .container {
    margin: 16px auto;
    padding: 0 14px 24px;
  }
  .card {
    padding: 16px;
  }
  .grid-chat,
  .grid-dashboard {
    grid-template-columns: 1fr;
    gap: 14px;
  }
}

/* ─────────────────────────────────────────────
   RWD — 手機 (< 640px)
───────────────────────────────────────────── */
@media (max-width: 639px) {
  .site-header {
    flex-direction: column;
    align-items: flex-start;
    gap: 8px;
    padding: 12px 16px;
  }
  .site-header nav {
    display: flex;
    flex-wrap: wrap;
    gap: 4px 0;
  }
  .site-header nav a {
    margin-left: 0;
    margin-right: 12px;
    font-size: 14px;
  }
  .container {
    margin: 10px auto;
    padding: 0 10px 18px;
  }
  .card {
    padding: 14px;
    border-radius: 12px;
  }
  .hero {
    padding: 20px 16px;
    border-radius: 12px;
  }
  h1 {
    font-size: 1.45rem;
  }
  h2 {
    font-size: 1.15rem;
  }
  h3 {
    font-size: 1rem;
  }
  textarea {
    font-size: 14px;
    min-height: 110px;
  }
  .btn {
    padding: 9px 12px;
    font-size: 14px;
  }
  .code-block {
    font-size: 13px;
    padding: 10px;
    min-height: 120px;
  }
  .progress-head {
    font-size: 13px;
  }
  .status-badge {
    font-size: 12px;
    padding: 5px 9px;
  }
}