:root {
    --bg-base: #0d0d0d; --bg-surface: #1e1e1e; --bg-elevated: #2a2a2a;
    --text-main: #e0e0e0; --text-muted: #888888;
    --accent: #5e81ac; --accent-hover: #4c6a8d;
    --border: #333333; --success: #4caf50; --error: #f44336;
}
body.dark-theme {
    margin: 0; padding: 0; background: var(--bg-base); color: var(--text-main);
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
    height: 100vh; display: flex; flex-direction: column; overflow: hidden;
}
* { box-sizing: border-box; }

/* Framework Utilities */
.flex-gap { display: flex; gap: 10px; align-items: center; }
.flex-1 { flex: 1; min-width: 0; }
.full-width { width: 100%; }
.mb-1 { margin-bottom: 5px; } .mb-2 { margin-bottom: 10px; } .mb-3 { margin-bottom: 15px; }
.mt-1 { margin-top: 5px; } .mt-2 { margin-top: 10px; }
.hidden { display: none !important; }
.text-muted { color: var(--text-muted); font-size: 0.9rem; }
.block { display: block; }
.warningText { color: var(--error); font-size: 0.85rem; }

/* Buttons */
.btn-theme { padding: 8px 16px; border: none; border-radius: 4px; cursor: pointer; font-size: 0.9rem; transition: background 0.2s; font-weight:500; display:flex; align-items:center; justify-content:center; gap:5px;}
.btn-primary { background: var(--accent); color: #fff; }
.btn-primary:hover { background: var(--accent-hover); }
.btn-outline { background: var(--bg-elevated); color: var(--text-main); border: 1px solid var(--border); }
.btn-outline:hover { background: var(--border); }
.btn-danger { background: rgba(244,67,54,0.1); color: var(--error); border: 1px solid var(--error); }
.btn-danger:hover { background: rgba(244,67,54,0.2); }
.btn-sm { padding: 4px 10px; font-size: 0.8rem; }
.btn-icon { background: transparent; border: none; color: var(--text-muted); cursor: pointer; font-size: 1.1rem; padding: 4px; }
.btn-icon:hover { color: var(--text-main); }

/* Inputs */
.input-theme { padding: 8px 12px; background: var(--bg-base); color: var(--text-main); border: 1px solid var(--border); border-radius: 4px; outline: none; font-size: 0.9rem; }
.input-theme:focus { border-color: var(--accent); }
.code-area { width: 100%; height: 250px; background: var(--bg-base); color: #d4d4d4; border: 1px solid var(--border); border-radius: 4px; padding: 10px; font-family: 'Consolas', 'Courier New', monospace; resize: vertical; outline: none; }
.code-area:focus { border-color: var(--accent); }

/* Layout */
.navbar { height: 50px; background: var(--bg-surface); border-bottom: 1px solid var(--border); display: flex; align-items: center; justify-content: space-between; padding: 0 20px; }
.nav-brand { display: flex; gap: 10px; align-items: center; }
.nav-brand h2 { margin: 0; font-size: 1.1rem; font-weight: 600; }
.nav-actions { display: flex; gap: 10px; align-items: center; }
.env-selector { display:flex; gap:5px; align-items:center; margin-right:15px; border-right:1px solid var(--border); padding-right:15px;}

.app-body { display: flex; flex: 1; height: calc(100vh - 50px); overflow: hidden; }

/* Sidebar */
.sidebar { width: 280px; background: var(--bg-surface); border-right: 1px solid var(--border); display: flex; flex-direction: column; }
.sidebar-tabs { display: flex; border-bottom: 1px solid var(--border); }
.side-tab { flex: 1; padding: 12px; background: transparent; border: none; border-bottom: 2px solid transparent; color: var(--text-muted); cursor: pointer; font-weight: 500; }
.side-tab.active { color: var(--text-main); border-bottom-color: var(--accent); }
.sidebar-content { flex: 1; overflow-y: auto; padding: 10px; }
.side-pane { display: none; } .side-pane.active { display: block; }
.list-stack { display: flex; flex-direction: column; gap: 5px; }
.empty-text { text-align: center; color: var(--text-muted); font-style: italic; padding: 20px 0; font-size: 0.9rem; }
.history-item { background: var(--bg-elevated); padding: 10px; border-radius: 4px; border: 1px solid transparent; cursor: pointer; display: flex; justify-content: space-between; }
.history-item:hover { border-color: var(--accent); }
.hi-meta { font-size: 0.8rem; display: flex; justify-content: space-between; margin-bottom: 4px; font-family: monospace; }
.hi-url { font-size: 0.85rem; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; color: var(--text-main); }
.hi-del { color: var(--error); background: transparent; border: none; cursor: pointer; opacity: 0.5; padding:0 5px;} .hi-del:hover { opacity: 1; }

.m-GET { color: var(--success); } .m-POST { color: #e6b422; } .m-PUT { color: #5e81ac; } .m-PATCH { color: #b48ead; } .m-DELETE { color: var(--error); }

/* Main Workspace */
.main-workspace { display: flex; flex: 1; overflow: hidden; }
.request-panel { flex: 1; border-right: 1px solid var(--border); display: flex; flex-direction: column; padding: 20px; overflow-y: auto; background:var(--bg-base); }
.response-panel { flex: 1; display: flex; flex-direction: column; background: var(--bg-surface); overflow-y: auto; }

/* Request Tools */
.url-bar { display: flex; gap: 0; margin-bottom: 15px; border-radius: 4px; border: 1px solid var(--border); overflow:hidden; }
.url-bar .method-drop { border: none; border-right:1px solid var(--border); background:var(--bg-elevated); color:var(--text-main); padding:0 15px; font-weight:bold; font-size:0.9rem; outline:none;}
.url-bar input { flex: 1; border: none; padding: 12px 15px; background:var(--bg-base); color:var(--text-main); font-size:1rem; outline:none; }
.url-bar .btn-primary { border-radius:0; border:none; padding:0 25px; font-size:1rem; }

.toolbar { display:flex; align-items:center; gap:10px; }
.req-tabs { display: flex; border-bottom: 1px solid var(--border); margin-bottom: 15px; }
.req-tab { padding: 8px 16px; background: transparent; border: none; border-bottom: 2px solid transparent; color: var(--text-muted); cursor: pointer; font-size:0.95rem; }
.req-tab.active { color: var(--text-main); border-bottom-color: var(--accent); }
.req-content { flex: 1; }
.req-pane { display: none; } .req-pane.active { display: block; }
.pane-header { display: flex; justify-content: space-between; align-items: center; margin-bottom: 10px; font-weight: 500; font-size: 0.95rem; }

/* KeyVal List */
.kv-list { display: flex; flex-direction: column; gap: 8px; border:1px solid var(--border); border-radius:4px; padding:10px; background:var(--bg-elevated); }
.kv-row { display: flex; gap: 8px; align-items: center; }
.kv-row input, .kv-row select { padding: 6px 10px; background:var(--bg-base); border:1px solid var(--border); color:var(--text-main); border-radius:3px; outline:none;}
.kv-row .k { flex: 1; } .kv-row .v { flex: 1.5; }
.kv-row .kv-type { width: 90px; }
.kv-row button { background: transparent; color: var(--text-muted); border: none; cursor: pointer; padding: 4px; }
.kv-row button:hover { color: var(--error); }

/* Response Tools */
.res-header { display: flex; justify-content: space-between; align-items: center; padding: 15px 20px; border-bottom: 1px solid var(--border); background:var(--bg-elevated); }
.status-badge { padding: 4px 8px; border-radius: 4px; background: var(--bg-base); border:1px solid var(--border); font-size: 0.85rem; font-family:monospace;}
.status-badge.success { border-color: var(--success); color: var(--success); }
.status-badge.error { border-color: var(--error); color: var(--error); }
.res-actions { display:flex; gap:10px; }
.res-body { flex: 1; padding: 0; margin:0; position:relative; overflow:auto;}
.res-body pre { margin: 0; padding: 20px; font-family: 'Consolas', 'Courier New', monospace; font-size: 0.9rem; color:#d4d4d4; }

/* Modals */
.modal-overlay { position: fixed; top: 0; left: 0; right: 0; bottom: 0; background: rgba(0,0,0,0.7); z-index: 1000; backdrop-filter:blur(2px);}
.modal { position: fixed; top: 10%; left: 50%; transform: translateX(-50%); background: var(--bg-surface); border: 1px solid var(--border); border-radius: 8px; width: 600px; max-width: 90vw; z-index: 1001; box-shadow: 0 10px 30px rgba(0,0,0,0.5); display: flex; flex-direction: column; }
.modal-header { padding: 15px 20px; border-bottom: 1px solid var(--border); display: flex; justify-content: space-between; align-items: center; }
.modal-header h3 { margin: 0; font-size: 1.1rem; }
.modal-body { padding: 20px; overflow-y: auto; max-height:60vh; }
.modal-footer { padding: 15px 20px; border-top: 1px solid var(--border); display: flex; justify-content: flex-end; }

/* Toggle Switch */
.toggle-switch { position: relative; display: inline-flex; align-items:center; cursor: pointer; gap:10px;}
.toggle-switch input { opacity: 0; width: 0; height: 0; }
.slider { position: relative; width: 40px; height: 20px; background-color: var(--bg-elevated); border-radius: 20px; transition: .4s; border:1px solid var(--border);}
.slider:before { position: absolute; content: ""; height: 14px; width: 14px; left: 2px; bottom: 2px; background-color: var(--text-muted); transition: .4s; border-radius: 50%; }
input:checked + .slider { background-color: var(--accent); border-color:var(--accent); }
input:checked + .slider:before { transform: translateX(20px); background-color: #fff; }
.label-text { font-size:0.9rem; color:var(--text-muted); }