:root {
  --ink: #0e2e2b;
  --ink-2: #103b37;
  --mint: #1fbf8f;
  --mint-soft: rgba(31, 191, 143, 0.14);
  --blue: #4f8cff;
  --bg: #0a201e;
  --panel: #0f2a27;
  --panel-2: #123430;
  --line: rgba(255, 255, 255, 0.08);
  --text: #eaf5f1;
  --muted: #8fb3aa;
  --danger: #ff6b6b;
  --warn: #ffcc66;
  --radius: 14px;
  --shadow: 0 10px 40px rgba(0, 0, 0, 0.35);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
}

* { box-sizing: border-box; }
html, body { margin: 0; height: 100%; }
body { background: radial-gradient(1200px 800px at 80% -10%, #14403a 0%, var(--bg) 55%); color: var(--text); }

/* ── Login ── */
#login {
  position: fixed; inset: 0; display: grid; place-items: center; z-index: 50;
  background: radial-gradient(900px 600px at 50% 0%, #163f39 0%, #071a18 60%, #06120f 100%);
}
.login-card {
  width: min(380px, 92vw); background: var(--panel); border: 1px solid var(--line);
  border-radius: 18px; padding: 34px 30px; box-shadow: var(--shadow); text-align: center;
}
.login-card .mark { font-size: 30px; font-weight: 700; letter-spacing: 0.5px; }
.login-card .mark span { color: var(--mint); }
.login-card p { color: var(--muted); margin: 6px 0 22px; font-size: 14px; }
.login-card input {
  width: 100%; padding: 13px 14px; border-radius: 11px; border: 1px solid var(--line);
  background: #0c2421; color: var(--text); font-size: 15px; outline: none;
}
.login-card input:focus { border-color: var(--mint); }
.login-card button { margin-top: 14px; width: 100%; }
.login-err { color: var(--danger); font-size: 13px; min-height: 18px; margin-top: 10px; }

/* ── Shell ── */
#app { display: grid; grid-template-columns: 250px 1fr; min-height: 100vh; }
.hidden { display: none !important; }

.sidebar {
  background: linear-gradient(180deg, var(--panel) 0%, #0c2421 100%);
  border-right: 1px solid var(--line); padding: 22px 14px; display: flex; flex-direction: column; gap: 4px;
  position: sticky; top: 0; height: 100vh; overflow-y: auto;
}
.sidebar .brand { font-size: 22px; font-weight: 700; padding: 6px 12px 18px; }
.sidebar .brand span { color: var(--mint); }
.nav-label { font-size: 11px; text-transform: uppercase; letter-spacing: 1.2px; color: var(--muted); padding: 16px 12px 6px; }
.nav-item {
  display: flex; align-items: center; gap: 10px; padding: 10px 12px; border-radius: 10px;
  color: var(--text); cursor: pointer; font-size: 14.5px; border: 1px solid transparent; user-select: none;
}
.nav-item:hover { background: var(--panel-2); }
.nav-item.active { background: var(--mint-soft); border-color: rgba(31,191,143,0.3); color: #d9fff2; }
.nav-item .ic { width: 18px; text-align: center; opacity: 0.9; }
.nav-item.soon { color: var(--muted); }
.nav-item.soon .tag { margin-left: auto; font-size: 10px; background: var(--panel-2); padding: 2px 7px; border-radius: 20px; }
.sidebar .spacer { flex: 1; }
.logout { color: var(--muted); }
.logout:hover { color: var(--danger); }

/* ── Content ── */
.content { padding: 26px 30px 60px; max-width: 1100px; }
.page-head { display: flex; align-items: center; justify-content: space-between; margin-bottom: 22px; flex-wrap: wrap; gap: 12px; }
.page-head h1 { font-size: 24px; margin: 0; }
.page-head .sub { color: var(--muted); font-size: 13.5px; margin-top: 4px; }

/* Cards */
.grid { display: grid; gap: 16px; }
.grid.cols-2 { grid-template-columns: repeat(2, 1fr); }
.grid.cols-3 { grid-template-columns: repeat(3, 1fr); }
.grid.cols-4 { grid-template-columns: repeat(4, 1fr); }
.card {
  background: var(--panel); border: 1px solid var(--line); border-radius: var(--radius);
  padding: 18px; box-shadow: var(--shadow);
}
.card h3 { margin: 0 0 4px; font-size: 14px; color: var(--muted); font-weight: 600; }
.card .big { font-size: 26px; font-weight: 700; }
.card .row { display: flex; align-items: center; justify-content: space-between; gap: 10px; }

/* Badges */
.badge { display: inline-flex; align-items: center; gap: 6px; padding: 4px 10px; border-radius: 20px; font-size: 12.5px; font-weight: 600; }
.badge::before { content: ""; width: 8px; height: 8px; border-radius: 50%; background: currentColor; }
.badge.ok { color: var(--mint); background: var(--mint-soft); }
.badge.off { color: var(--muted); background: rgba(255,255,255,0.05); }
.badge.bad { color: var(--danger); background: rgba(255,107,107,0.12); }
.badge.warn { color: var(--warn); background: rgba(255,204,102,0.12); }

/* Buttons */
button, .btn {
  font: inherit; cursor: pointer; border-radius: 11px; border: 1px solid var(--line);
  background: var(--panel-2); color: var(--text); padding: 10px 16px; font-size: 14px; font-weight: 600;
  transition: transform 0.05s ease, background 0.15s ease;
}
button:hover, .btn:hover { background: #16403a; }
button:active { transform: translateY(1px); }
.btn-primary { background: var(--mint); color: #04231b; border-color: transparent; }
.btn-primary:hover { background: #2bd3a0; }
.btn-danger { background: rgba(255,107,107,0.15); color: var(--danger); border-color: rgba(255,107,107,0.3); }
.btn-danger:hover { background: rgba(255,107,107,0.25); }
.btn-ghost { background: transparent; }
.btn-sm { padding: 6px 11px; font-size: 12.5px; }
button:disabled { opacity: 0.5; cursor: not-allowed; }

/* Toggle */
.toggle { position: relative; width: 50px; height: 28px; flex: none; }
.toggle input { display: none; }
.toggle .track { position: absolute; inset: 0; background: var(--panel-2); border: 1px solid var(--line); border-radius: 20px; transition: 0.2s; }
.toggle .dot { position: absolute; top: 3px; left: 3px; width: 22px; height: 22px; border-radius: 50%; background: var(--muted); transition: 0.2s; }
.toggle input:checked + .track { background: var(--mint-soft); border-color: var(--mint); }
.toggle input:checked + .track + .dot { left: 25px; background: var(--mint); }

/* Tables / lists */
table { width: 100%; border-collapse: collapse; font-size: 13.5px; }
th, td { text-align: left; padding: 10px 12px; border-bottom: 1px solid var(--line); vertical-align: top; }
th { color: var(--muted); font-weight: 600; font-size: 12px; text-transform: uppercase; letter-spacing: 0.4px; }
tr:hover td { background: rgba(255,255,255,0.02); }

input[type=text], input[type=password], input[type=number], textarea, select {
  background: #0c2421; border: 1px solid var(--line); color: var(--text); border-radius: 10px;
  padding: 10px 12px; font: inherit; font-size: 14px; outline: none; width: 100%;
}
input:focus, textarea:focus, select:focus { border-color: var(--mint); }
label { font-size: 13px; color: var(--muted); display: block; margin-bottom: 6px; }
.field { margin-bottom: 14px; }
.toolbar { display: flex; gap: 10px; margin-bottom: 16px; flex-wrap: wrap; align-items: center; }
.toolbar .grow { flex: 1; min-width: 160px; }

.muted { color: var(--muted); }
.empty { color: var(--muted); text-align: center; padding: 40px; }
.placeholder { text-align: center; padding: 60px 20px; }
.placeholder .ic { font-size: 44px; }
.placeholder h2 { margin: 14px 0 6px; }
.spin { color: var(--muted); padding: 30px; text-align: center; }

.chat-log { background: #0c2421; border: 1px solid var(--line); border-radius: 12px; padding: 14px; height: 340px; overflow-y: auto; margin-bottom: 12px; }
.msg { margin: 8px 0; max-width: 80%; padding: 9px 13px; border-radius: 12px; font-size: 14px; line-height: 1.4; }
.msg.me { background: var(--mint-soft); margin-left: auto; }
.msg.sophia { background: var(--panel-2); }

@media (max-width: 820px) {
  #app { grid-template-columns: 1fr; }
  .sidebar { position: static; height: auto; flex-direction: row; flex-wrap: wrap; }
  .grid.cols-3, .grid.cols-4, .grid.cols-2 { grid-template-columns: 1fr; }
}