:root {
  --bg: #1e1e2e;
  --panel: #27293d;
  --panel-2: #2f3149;
  --border: #3a3d5c;
  --text: #e4e6f1;
  --muted: #9aa0c0;
  --accent: #c21610;     /* cam kiểu Postman */
  --accent-2: #4f8cff;
  --green: #49cc90;
  --red: #f93e3e;
  --yellow: #fca130;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: "Segoe UI", system-ui, sans-serif;
  background: var(--bg);
  color: var(--text);
  height: 100vh;
  display: flex;
  flex-direction: column;
  font-size: 14px;
}

/* Topbar */
.topbar {
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 8px 16px;
  background: var(--panel);
  border-bottom: 1px solid var(--border);
}
.brand { font-weight: 700; color: var(--accent); font-size: 16px; }
.topnav { display: flex; gap: 4px; margin-left: 20px; }
.topnav a {
  color: var(--muted); text-decoration: none; padding: 6px 14px;
  border-radius: 6px; font-weight: 600;
}
.topnav a:hover { background: var(--panel-2); color: var(--text); }
.topnav a.active { color: var(--text); background: var(--panel-2); }
.env-select { display: flex; align-items: center; gap: 6px; margin-left: auto; }
.env-select label { color: var(--muted); font-size: 12px; }
.topbar-actions { display: flex; gap: 6px; }

/* Layout */
.layout { flex: 1; display: flex; overflow: hidden; }
.sidebar {
  width: 260px;
  background: var(--panel);
  border-right: 1px solid var(--border);
  display: flex;
  flex-direction: column;
  overflow: hidden;
}
.sidebar-tabs { display: flex; }
.side-tab {
  flex: 1; padding: 10px; background: transparent; border: none;
  color: var(--muted); cursor: pointer; border-bottom: 2px solid transparent;
}
.side-tab.active { color: var(--text); border-bottom-color: var(--accent); }
.side-panel { flex: 1; overflow: auto; padding: 10px; }

.main { flex: 1; display: flex; flex-direction: column; overflow: hidden; padding: 12px; gap: 10px; }

/* Tab bar */
.tab-bar {
  display: flex; align-items: stretch; gap: 2px; overflow-x: auto;
  border-bottom: 1px solid var(--border); min-height: 36px;
}
.tab {
  display: flex; align-items: center; gap: 8px; padding: 6px 8px 6px 12px;
  background: var(--panel); border: 1px solid var(--border); border-bottom: none;
  border-radius: 6px 6px 0 0; cursor: pointer; color: var(--muted);
  max-width: 220px; white-space: nowrap;
}
.tab:hover { background: var(--panel-2); }
.tab.active { background: var(--panel-2); color: var(--text); border-top: 2px solid var(--accent); }
.tab .m { font-weight: 700; font-size: 11px; }
.tab .tab-title { overflow: hidden; text-overflow: ellipsis; max-width: 130px; }
.tab .tab-dot { width: 8px; height: 8px; border-radius: 50%; background: var(--accent); flex: 0 0 auto; }
.tab .tab-close {
  background: none; border: none; color: var(--muted); cursor: pointer;
  font-size: 15px; line-height: 1; padding: 0 2px; border-radius: 3px;
}
.tab .tab-close:hover { background: var(--border); color: var(--text); }
.tab-add {
  background: none; border: none; color: var(--muted); cursor: pointer;
  font-size: 20px; padding: 0 12px; align-self: center;
}
.tab-add:hover { color: var(--accent); }
#request-editor { display: flex; flex-direction: column; gap: 10px; }

/* URL bar */
.url-bar { display: flex; gap: 8px; }
.method-select {
  background: var(--panel-2); color: var(--accent); font-weight: 700;
  border: 1px solid var(--border); border-radius: 6px; padding: 0 8px; min-width: 100px;
}
#url {
  flex: 1; background: var(--panel-2); border: 1px solid var(--border);
  color: var(--text); border-radius: 6px; padding: 10px 12px; font-family: monospace;
}

/* Buttons */
button { font-size: 13px; }
.btn-send {
  background: var(--accent); color: #fff; border: none; border-radius: 6px;
  padding: 0 22px; font-weight: 600; cursor: pointer;
}
.btn-send:hover { filter: brightness(1.1); }
.btn-ghost {
  background: var(--panel-2); color: var(--text); border: 1px solid var(--border);
  border-radius: 6px; padding: 8px 12px; cursor: pointer;
}
.btn-ghost:hover { background: var(--border); }
.btn-block { width: 100%; padding: 8px; margin-bottom: 8px; background: var(--panel-2);
  color: var(--text); border: 1px dashed var(--border); border-radius: 6px; cursor: pointer; }
.btn-danger-ghost { color: var(--red); border-color: var(--red); }

/* Tabs */
.req-tabs, .resp-tabs { display: flex; gap: 4px; border-bottom: 1px solid var(--border); }
.req-tab, .resp-tab {
  padding: 8px 14px; background: transparent; border: none; color: var(--muted);
  cursor: pointer; border-bottom: 2px solid transparent;
}
.req-tab.active, .resp-tab.active { color: var(--text); border-bottom-color: var(--accent); }

.req-pane { max-height: 30vh; overflow: auto; }

/* KV table */
.kv-table { width: 100%; border-collapse: collapse; }
.kv-table td { padding: 2px; }
.kv-table input[type=text] {
  width: 100%; background: var(--panel-2); border: 1px solid var(--border);
  color: var(--text); padding: 6px 8px; border-radius: 4px; font-family: monospace;
}
.kv-table .col-chk { width: 28px; text-align: center; }
.kv-table .col-del { width: 28px; text-align: center; }
.kv-table .col-type { width: 80px; }
.kv-table .kv-type { width: 100%; padding: 5px 6px; font-size: 12px; }
.file-pick {
  width: 100%; text-align: left; background: var(--panel-2); border: 1px solid var(--border);
  color: var(--text); padding: 6px 8px; border-radius: 4px; cursor: pointer;
  font-family: monospace; overflow: hidden; text-overflow: ellipsis; white-space: nowrap;
}
.file-pick:hover { border-color: var(--accent); }
.icon-btn { background: none; border: none; color: var(--muted); cursor: pointer; font-size: 15px; }
.icon-btn:hover { color: var(--red); }

/* Auth / body */
.auth-row { display: flex; align-items: center; gap: 10px; margin-bottom: 10px; }
.auth-row label { color: var(--muted); }
select, .auth-row select {
  background: var(--panel-2); color: var(--text); border: 1px solid var(--border);
  border-radius: 6px; padding: 6px 8px;
}
#auth-fields input {
  background: var(--panel-2); border: 1px solid var(--border); color: var(--text);
  padding: 8px; border-radius: 4px; margin: 4px 8px 4px 0; font-family: monospace; min-width: 240px;
}
.body-modes { display: flex; gap: 16px; margin-bottom: 8px; color: var(--muted); flex-wrap: wrap; }
.body-text {
  width: 100%; min-height: 120px; background: var(--panel-2); border: 1px solid var(--border);
  color: var(--text); border-radius: 6px; padding: 10px; font-family: monospace; resize: vertical;
}

/* Response */
.response { flex: 1; display: flex; flex-direction: column; overflow: hidden; border-top: 1px solid var(--border); padding-top: 8px; }
.resp-status { padding: 6px 0; font-family: monospace; }
.resp-status .ok-2xx { color: var(--green); }
.resp-status .ok-3xx { color: var(--accent-2); }
.resp-status .ok-4xx, .resp-status .ok-5xx { color: var(--red); }
.resp-status .pill { padding: 2px 8px; border-radius: 10px; background: var(--panel-2); margin-right: 10px; }
.resp-toolbar { display: flex; gap: 6px; padding: 6px 0; }
.chip {
  background: var(--panel-2); border: 1px solid var(--border); color: var(--muted);
  border-radius: 12px; padding: 3px 12px; cursor: pointer;
}
.chip.active { color: var(--text); border-color: var(--accent); }
.resp-body {
  flex: 1; overflow: auto; background: var(--panel-2); border: 1px solid var(--border);
  border-radius: 6px; padding: 12px; margin: 0; font-family: monospace; white-space: pre-wrap;
  word-break: break-word;
}
/* Xem trước nội dung nhị phân */
.resp-binary-info { margin-bottom: 10px; }
.resp-bin-img { max-width: 100%; max-height: 420px; border-radius: 6px; display: block;
  background: repeating-conic-gradient(#2a2c40 0% 25%, #24263a 0% 50%) 50% / 16px 16px; }
.resp-bin-video { max-width: 100%; max-height: 420px; border-radius: 6px; display: block; }
.resp-bin-pdf { width: 100%; height: 480px; border: none; border-radius: 6px; background: #fff; }
.resp-bin-dl { display: inline-block; margin-top: 12px; text-decoration: none; }

/* JSON highlight (đơn giản, không cần thư viện) */
.tok-key { color: var(--accent-2); }
.tok-str { color: var(--green); }
.tok-num { color: var(--yellow); }
.tok-bool { color: #c678dd; }
.tok-null { color: var(--muted); }

/* Tree (collections/history) */
.tree { font-size: 13px; }
.tree-coll { margin-bottom: 6px; }
.tree-coll-head { display: flex; align-items: center; gap: 6px; font-weight: 600; padding: 4px; cursor: pointer; }
.tree-coll-head:hover { background: var(--panel-2); border-radius: 4px; }
.tree-item {
  display: flex; align-items: center; gap: 6px; padding: 4px 6px 4px 18px;
  cursor: pointer; border-radius: 4px;
}
.tree-item:hover { background: var(--panel-2); }
.tree-item .m { font-weight: 700; font-size: 11px; min-width: 42px; }
.m-GET { color: var(--green); } .m-POST { color: var(--yellow); }
.m-PUT { color: var(--accent-2); } .m-PATCH { color: #c678dd; }
.m-DELETE { color: var(--red); } .m-HEAD, .m-OPTIONS { color: var(--muted); }
.tree-item .label { flex: 1; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.muted { color: var(--muted); }

/* Modal */
.modal { position: fixed; inset: 0; background: rgba(0,0,0,.6); display: flex;
  align-items: center; justify-content: center; z-index: 50; }
.modal-box { background: var(--panel); border: 1px solid var(--border); border-radius: 10px;
  padding: 20px; width: 560px; max-width: 92vw; }
.modal-wide { width: 760px; }
.modal-box h3 { margin-top: 0; }
.modal-actions { display: flex; justify-content: flex-end; gap: 8px; margin-top: 14px; }
.warnings { color: var(--yellow); font-size: 12px; margin-top: 8px; white-space: pre-wrap; }
.field-label { display: block; color: var(--muted); font-size: 12px; margin: 10px 0 4px; }
.full-input {
  width: 100%; background: var(--panel-2); border: 1px solid var(--border);
  color: var(--text); padding: 8px 10px; border-radius: 6px; font-family: monospace;
}

.env-manager { display: flex; gap: 14px; min-height: 280px; }
.env-sidebar { width: 200px; border-right: 1px solid var(--border); padding-right: 10px; }
.env-editor { flex: 1; }
.env-editor input[type=text] { width: 100%; margin-bottom: 8px; }
.env-var-row { display: flex; gap: 6px; margin-bottom: 6px; }
.env-var-row input { font-family: monospace; }

/* Toast */
.toast {
  position: fixed; bottom: 20px; left: 50%; transform: translateX(-50%);
  background: var(--panel-2); border: 1px solid var(--border); color: var(--text);
  padding: 10px 18px; border-radius: 8px; z-index: 100;
}
.toast.err { border-color: var(--red); color: #ffb4b4; }

.hidden { display: none !important; }