:root {
  --bg: #ffffff;
  --panel: #ffffff;
  --raised: #f7f8fa;
  --border: #e3e6ea;
  --text: #23272b;
  --muted: #6b7075;
  --faint: #9aa0a6;
  --green: #1e8a5a;
  --green-dark: #17704a;
  --green-soft: #e8f5ef;
  --amber: #c8891c;
  --red: #cf3f45;
  --radius: 12px;
  --shadow: 0 1px 2px rgba(16, 24, 40, 0.04), 0 8px 28px rgba(16, 24, 40, 0.06);
  --font: -apple-system, BlinkMacSystemFont, "Inter", "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --mono: ui-monospace, "SF Mono", SFMono-Regular, Menlo, Consolas, monospace;
}

* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }

body {
  background: var(--bg);
  color: var(--text);
  font-family: var(--font);
  font-size: 16px;
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
  display: flex;
  align-items: flex-start;
}

.wrap { max-width: 1400px; margin: 0 auto; padding: 0 32px; }

/* ---------- sidebar ---------- */
.sidebar {
  position: sticky;
  top: 0;
  height: 100vh;
  width: 300px;
  flex: none;
  background: #fff;
  display: flex;
  flex-direction: column;
  gap: 22px;
  padding: 24px 14px;
}
.sidebar .wordmark { font-size: 17px; font-weight: 700; padding: 0 12px; }
.sidebar .wordmark::first-letter { color: var(--green); }
.nav { display: flex; flex-direction: column; gap: 2px; }
.nav-btn {
  appearance: none;
  display: flex;
  align-items: center;
  gap: 10px;
  width: 100%;
  border: 0;
  background: transparent;
  cursor: pointer;
  text-align: left;
  font: 600 14px var(--font);
  color: var(--muted);
  padding: 10px 12px;
  border-radius: 8px;
  transition: background 0.12s, color 0.12s;
}
.nav-btn:hover { background: var(--raised); color: var(--text); }
.nav-btn svg { flex: none; }

.server-status { font-size: 12px; color: var(--faint); padding: 0 12px; margin: 0 0 4px; }
.server-status.on { color: var(--green); }

.auth-error {
  margin: 12px 0 0;
  font-size: 13.5px;
  color: var(--red);
  background: #fbe9ea;
  border: 1px solid rgba(207, 63, 69, 0.35);
  border-radius: 8px;
  padding: 9px 12px;
}
.auth-error[hidden] { display: none; }

main.wrap { padding: 0 32px 60px; display: flex; flex-direction: column; gap: 24px; flex: 1; min-width: 0; }

/* ---------- tool card ---------- */
.tool-card {
  background: var(--panel);
  border: 0;
  border-radius: 16px;
  padding: 22px;
}

.panes { display: grid; grid-template-columns: 1fr 1fr; gap: 18px; }
.pane { display: flex; flex-direction: column; gap: 10px; }
.pane-head { display: flex; align-items: center; justify-content: space-between; gap: 10px; min-height: 30px; }
.pane-title { font-size: 15px; font-weight: 600; color: var(--muted); }

textarea {
  width: 100%;
  min-height: 600px;
  resize: vertical;
  background: var(--raised);
  color: var(--text);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 18px;
  font: 16px/1.7 var(--mono);
  transition: border-color 0.12s, box-shadow 0.12s;
}
textarea::placeholder { color: var(--faint); }
textarea:focus { outline: none; border-color: var(--green); box-shadow: 0 0 0 3px rgba(30, 138, 90, 0.12); }
textarea.out { background: #fff; }
textarea[readonly] { cursor: default; }

.input-wrap { position: relative; }
.float-btn {
  position: absolute;
  top: 12px; right: 12px;
  background: rgba(255, 255, 255, 0.9);
  backdrop-filter: blur(4px);
  border: 1px solid var(--border);
  color: var(--green-dark);
  font-weight: 600;
  box-shadow: 0 1px 3px rgba(16, 24, 40, 0.10);
}
.float-btn:hover { border-color: var(--green); }

.pane-actions { display: flex; align-items: center; gap: 12px; }
.text-btn {
  appearance: none; border: 0; background: transparent;
  color: var(--green); font: 600 14px var(--font); cursor: pointer; padding: 4px 6px;
}
.text-btn:hover { text-decoration: underline; }

.badge {
  font: 600 13.5px var(--mono);
  padding: 5px 12px;
  border-radius: 999px;
  background: var(--green-soft);
  color: var(--green-dark);
  white-space: nowrap;
}
.badge.warn { background: #fdf1dd; color: var(--amber); }
.badge.bad { background: #fbe9ea; color: var(--red); }

/* ---------- toolbar ---------- */
.toolbar {
  display: flex; align-items: center; justify-content: space-between;
  gap: 14px; flex-wrap: wrap; margin-top: 20px; padding-top: 18px;
  border-top: 1px solid var(--border);
}
.seg { display: inline-flex; background: var(--raised); border: 1px solid var(--border); border-radius: 10px; padding: 4px; gap: 3px; }
.seg-btn {
  appearance: none; border: 0; background: transparent;
  color: var(--muted); font: 600 15px var(--font);
  padding: 10px 20px; border-radius: 7px; cursor: pointer;
}
.seg-btn:hover { color: var(--text); }
.seg-btn.active { background: #fff; color: var(--text); box-shadow: 0 1px 4px rgba(16,24,40,0.14); }

.btn {
  appearance: none; display: inline-flex; align-items: center; justify-content: center; gap: 10px;
  font: 600 15px var(--font); height: 44px; padding: 0 24px; border-radius: 10px; cursor: pointer;
  border: 1px solid transparent; transition: background 0.12s, border-color 0.12s, color 0.12s;
}
.btn.primary { background: var(--green); color: #fff; }
.btn.primary:hover { background: var(--green-dark); }
.btn.ghost {
  background: #fff; color: var(--muted);
  border-color: var(--border); height: 38px; padding: 0 16px; font-size: 14px; border-radius: 8px;
}
.btn.ghost:hover { color: var(--text); border-color: var(--faint); }
.btn.mini { height: 32px; padding: 0 14px; font-size: 14px; font-weight: 600; border-radius: 7px; border-color: var(--border); background: #fff; color: var(--muted); }
.btn.mini:hover { color: var(--text); border-color: var(--faint); }
.btn:disabled { opacity: 0.5; cursor: default; }

.spinner {
  width: 16px; height: 16px; border-radius: 50%;
  border: 2.5px solid rgba(255,255,255,0.35); border-top-color: #fff;
  display: none; animation: spin 0.8s linear infinite;
}
@keyframes spin { to { transform: rotate(360deg); } }
body.busy .primary .spinner { display: inline-block; }

/* ---------- connection modal ---------- */
.modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(16, 20, 26, 0.5);
  display: grid;
  place-items: center;
  padding: 24px;
  z-index: 40;
}
.modal-overlay[hidden] { display: none; }
.modal {
  width: min(620px, 100%);
  background: #fff;
  border: 1px solid var(--border);
  border-radius: 16px;
  box-shadow: 0 24px 64px rgba(16, 24, 40, 0.24);
  padding: 24px;
}
.modal-head { display: flex; align-items: flex-start; justify-content: space-between; gap: 16px; margin-bottom: 18px; }
.modal-head h2 { margin: 0; font-size: 19px; font-weight: 700; }
.modal-head p { margin: 4px 0 0; font-size: 13.5px; color: var(--muted); }
.modal .icon-btn {
  width: 34px; height: 34px; flex: none;
  background: var(--raised); color: var(--muted);
  border: 1px solid var(--border); border-radius: 8px;
  display: inline-flex; align-items: center; justify-content: center;
  font-size: 14px; cursor: pointer;
}
.modal .icon-btn:hover { color: var(--text); border-color: var(--faint); }
.modal-foot { display: flex; justify-content: flex-end; margin-top: 18px; }
.conn-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 16px; }
.conn-note { font-size: 13px; color: var(--faint); margin: 12px 0 0; }
.conn-grid label { display: flex; flex-direction: column; gap: 6px; font-size: 13.5px; color: var(--muted); }
.conn-grid .sub { color: var(--faint); font-weight: 400; }

select, input {
  background: #fff; color: var(--text);
  border: 1px solid var(--border); border-radius: 8px;
  padding: 12px 14px; font: 15.5px var(--font);
  transition: border-color 0.12s, box-shadow 0.12s;
}
select:focus, input:focus { outline: none; border-color: var(--green); box-shadow: 0 0 0 3px rgba(30,138,90,0.10); }
select { appearance: none; padding-right: 34px; background-image: linear-gradient(45deg, transparent 50%, var(--faint) 50%), linear-gradient(135deg, var(--faint) 50%, transparent 50%); background-position: calc(100% - 17px) 50%, calc(100% - 12px) 50%; background-size: 5px 5px; background-repeat: no-repeat; }
input::placeholder { color: var(--faint); }

/* ---------- meta / features ---------- */
.meta {
  background: #fff; border: 1px solid var(--border); border-radius: 14px;
  box-shadow: var(--shadow); padding: 16px 20px;
}
.meta p { margin: 0; font-size: 14px; color: var(--muted); }
.feat { margin-top: 12px; }
.feat summary { list-style: none; cursor: pointer; font-size: 14px; color: var(--muted); }
.feat summary::-webkit-details-marker { display: none; }
.feat summary:hover { color: var(--text); }
.feat-body { border-top: 1px solid var(--border); margin-top: 12px; padding-top: 14px; }
.feat-body h4 { margin: 0 0 7px; font-size: 12px; font-weight: 600; color: var(--faint); text-transform: uppercase; letter-spacing: 0.06em; }
.feat-body h4:not(:first-child) { margin-top: 16px; }
.feat-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 6px 24px; }
.feat-grid div { display: flex; justify-content: space-between; gap: 12px; font-size: 14px; color: var(--muted); }
.feat-grid b { color: var(--text); font-weight: 500; font-family: var(--mono); }
.feat-grid .ph { grid-column: 1 / -1; }

/* ---------- pricing ---------- */
.modal-wide { width: min(780px, 100%); }
.plans { display: grid; grid-template-columns: 1fr 1fr; gap: 18px; }
.plan {
  position: relative;
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 20px;
  display: flex;
  flex-direction: column;
}
.plan.pro { border-color: var(--green); background: linear-gradient(180deg, rgba(30,138,90,0.05), #fff); }
.plan-badge {
  position: absolute;
  top: -11px; left: 20px;
  background: var(--green);
  color: #fff;
  font-size: 12px;
  font-weight: 700;
  padding: 3px 10px;
  border-radius: 999px;
}
.plan h3 { margin: 0; font-size: 16px; }
.plan .price { margin: 10px 0 0; font-size: 30px; font-weight: 750; letter-spacing: -0.02em; }
.plan .price .per { font-size: 14px; font-weight: 500; color: var(--faint); }
.plan-sub { margin: 2px 0 12px; font-size: 13px; color: var(--muted); }
.plan ul { margin: 0 0 18px; padding: 0; list-style: none; display: flex; flex-direction: column; gap: 8px; }
.plan li { font-size: 14px; color: var(--text); padding-left: 20px; position: relative; }
.plan li::before {
  content: "";
  position: absolute;
  left: 2px; top: 8px;
  width: 7px; height: 7px;
  border-radius: 50%;
  background: var(--green);
}
.plan .btn { margin-top: auto; width: 100%; }

/* ---------- sidebar footer ---------- */
.sidebar .foot {
  margin-top: auto;
  padding-top: 16px;
  border-top: 1px solid var(--border);
  font-size: 12px;
  color: var(--faint);
  line-height: 1.6;
}
.sidebar .foot p { margin: 0; }
.sidebar .foot .foot-brand { margin-top: 12px; color: var(--muted); }
.sidebar .foot a { color: var(--green-dark); font-weight: 600; text-decoration: none; }
.sidebar .foot a:hover { text-decoration: underline; }

.toast {
  position: fixed; bottom: 24px; left: 50%; transform: translate(-50%, 8px);
  background: #fff; color: var(--text); border: 1px solid var(--red);
  border-radius: 12px; padding: 13px 20px; font-size: 14.5px;
  max-width: min(580px, 90vw); box-shadow: 0 10px 28px rgba(16,24,40,0.18);
  opacity: 0; transition: opacity 0.18s, transform 0.18s; z-index: 20;
}
.toast:not([hidden]) { opacity: 1; transform: translate(-50%, 0); }
.toast[hidden] { display: none; }

@media (max-width: 900px) {
  body { display: block; }
  .sidebar {
    position: sticky;
    top: 0;
    width: 100%;
    height: auto;
    flex-direction: row;
    align-items: center;
    justify-content: space-between;
    gap: 12px;
    padding: 12px 16px;
    border-right: 0;
    border-bottom: 1px solid var(--border);
    z-index: 30;
  }
  .sidebar .wordmark { padding: 0; }
  .nav { flex-direction: row; }
  .nav-btn { padding: 9px 12px; }
  main.wrap { padding-top: 28px; }
  .panes { grid-template-columns: 1fr; }
  .conn-grid { grid-template-columns: 1fr 1fr; }
  .toolbar { flex-direction: column; align-items: stretch; }
  .plans { grid-template-columns: 1fr; }
}
@media (max-width: 560px) {
  .conn-grid { grid-template-columns: 1fr; }
  textarea { font-size: 15px; }
}