:root {
  --bg: #0b1120;
  --bg-soft: #111a2e;
  --card: #141e33;
  --card-hi: #1a273f;
  --border: #24344f;
  --text: #e8eef8;
  --muted: #8fa3bf;
  --accent: #38bdf8;
  --accent-strong: #0ea5e9;
  --ok: #34d399;
  --warn: #fbbf24;
  --danger: #f87171;
  --radius: 14px;
  --shadow: 0 18px 40px -24px rgba(0, 0, 0, .9);
}

* { box-sizing: border-box; }

html, body { height: 100%; }

body {
  margin: 0;
  background:
    radial-gradient(1100px 620px at 8% -12%, rgba(56, 189, 248, .13), transparent 62%),
    radial-gradient(900px 520px at 100% 0%, rgba(99, 102, 241, .12), transparent 58%),
    var(--bg);
  color: var(--text);
  font: 15px/1.55 -apple-system, BlinkMacSystemFont, "Segoe UI", Inter, Roboto,
        "Helvetica Neue", Arial, sans-serif;
  -webkit-font-smoothing: antialiased;
}

.mono {
  font-family: ui-monospace, SFMono-Regular, "SF Mono", Menlo, Consolas,
               "Liberation Mono", monospace;
  font-size: .88em;
}

.break { word-break: break-all; }

h1, h2, h3 { margin: 0 0 .35em; line-height: 1.25; letter-spacing: -.015em; }
h1 { font-size: 1.6rem; }
h2 { font-size: 1.02rem; text-transform: uppercase; letter-spacing: .08em; color: var(--muted); }

p { margin: 0 0 .8em; }
.muted { color: var(--muted); }

/* ------------------------------------------------------------------ topbar */

.topbar {
  position: sticky;
  top: 0;
  z-index: 20;
  backdrop-filter: blur(12px);
  background: rgba(11, 17, 32, .82);
  border-bottom: 1px solid var(--border);
}

.bar-inner {
  max-width: 1080px;
  margin: 0 auto;
  padding: .7rem 1.25rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: .6rem;
  color: var(--text);
  text-decoration: none;
  font-weight: 600;
  letter-spacing: -.01em;
}

.mark {
  width: 22px;
  height: 22px;
  border-radius: 50%;
  border: 2.5px solid var(--accent);
  box-shadow: 0 0 0 4px rgba(56, 189, 248, .12);
  flex: 0 0 auto;
}

.mark-lg {
  width: 44px;
  height: 44px;
  border-width: 3.5px;
  box-shadow: 0 0 0 9px rgba(56, 189, 248, .1);
  margin-bottom: .9rem;
}

.logout-form { margin: 0; }

/* ------------------------------------------------------------------- shell */

.shell {
  max-width: 1080px;
  margin: 0 auto;
  padding: 2rem 1.25rem 4rem;
}

.page-head {
  display: flex;
  flex-wrap: wrap;
  align-items: flex-start;
  justify-content: space-between;
  gap: 1rem;
  margin-bottom: 1.5rem;
}

.back {
  display: inline-block;
  margin-bottom: .55rem;
  color: var(--muted);
  text-decoration: none;
  font-size: .9rem;
}

.back:hover { color: var(--accent); }

/* ------------------------------------------------------------------- cards */

.card {
  background: linear-gradient(180deg, var(--card-hi), var(--card));
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.35rem;
  box-shadow: var(--shadow);
  margin-bottom: 1.25rem;
}

.create-card h2 { margin-bottom: .9rem; }

.empty { text-align: center; padding: 3rem 1.5rem; }
.empty h1 { font-size: 2.4rem; color: var(--muted); }

.grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
  gap: 1.1rem;
}

.peer-card {
  margin: 0;
  display: flex;
  flex-direction: column;
  gap: .9rem;
}

.peer-top {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: .75rem;
}

.peer-top h3 { font-size: 1.12rem; margin: 0; word-break: break-word; }

/* ------------------------------------------------------------------ badges */

.badge {
  flex: 0 0 auto;
  font-size: .72rem;
  font-weight: 600;
  letter-spacing: .04em;
  text-transform: uppercase;
  padding: .3rem .6rem;
  border-radius: 999px;
  border: 1px solid var(--border);
  color: var(--muted);
  white-space: nowrap;
}

.badge.online { color: var(--ok); border-color: rgba(52, 211, 153, .42); background: rgba(52, 211, 153, .1); }
.badge.idle { color: var(--warn); border-color: rgba(251, 191, 36, .38); background: rgba(251, 191, 36, .09); }
.badge.offline { color: var(--muted); }

.status-pill {
  display: inline-flex;
  align-items: center;
  gap: .5rem;
  padding: .45rem .85rem;
  border-radius: 999px;
  border: 1px solid var(--border);
  background: var(--bg-soft);
  font-size: .86rem;
  color: var(--muted);
}

.status-pill .dot { width: 8px; height: 8px; border-radius: 50%; background: var(--muted); }
.status-pill.ok .dot { background: var(--ok); box-shadow: 0 0 0 4px rgba(52, 211, 153, .16); }
.status-pill.warn { color: var(--warn); }
.status-pill.warn .dot { background: var(--warn); box-shadow: 0 0 0 4px rgba(251, 191, 36, .16); }

/* -------------------------------------------------------------------- meta */

.meta {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: .6rem .9rem;
  margin: 0;
}

.meta-wide { grid-template-columns: repeat(auto-fit, minmax(190px, 1fr)); }

.meta div { min-width: 0; }
.meta dt { font-size: .74rem; text-transform: uppercase; letter-spacing: .07em; color: var(--muted); }
.meta dd { margin: .12rem 0 0; word-break: break-word; }

/* ----------------------------------------------------------------- buttons */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: .4rem;
  padding: .62rem 1rem;
  border-radius: 10px;
  border: 1px solid transparent;
  font: inherit;
  font-weight: 600;
  font-size: .9rem;
  cursor: pointer;
  text-decoration: none;
  transition: background .15s ease, border-color .15s ease, transform .06s ease;
  white-space: nowrap;
}

.btn:active { transform: translateY(1px); }

.btn-primary { background: var(--accent-strong); color: #04202e; border-color: var(--accent-strong); }
.btn-primary:hover { background: var(--accent); border-color: var(--accent); }

.btn-ghost { background: transparent; color: var(--text); border-color: var(--border); }
.btn-ghost:hover { background: var(--bg-soft); border-color: var(--accent); }

.btn-danger { background: transparent; color: var(--danger); border-color: rgba(248, 113, 113, .38); }
.btn-danger:hover { background: rgba(248, 113, 113, .12); }

.btn-sm { padding: .42rem .7rem; font-size: .82rem; }
.btn-block { width: 100%; }

.peer-actions {
  display: flex;
  flex-wrap: wrap;
  gap: .45rem;
  margin-top: auto;
  padding-top: .3rem;
}

.peer-actions form { margin: 0; }

.locked-note {
  font-size: .82rem;
  color: var(--muted);
  padding: .42rem 0;
}

.upload-form {
  margin-top: 1.1rem;
  padding-top: 1rem;
  border-top: 1px solid var(--border);
}

input[type="file"] {
  width: 100%;
  padding: .55rem .6rem;
  border-radius: 10px;
  border: 1px dashed var(--border);
  background: rgba(8, 13, 24, .6);
  color: var(--muted);
  font: inherit;
  font-size: .88rem;
  cursor: pointer;
}

input[type="file"]:hover { border-color: var(--accent); }

/* ------------------------------------------------------------------- forms */

.inline-form { display: flex; gap: .6rem; flex-wrap: wrap; }
.inline-form input[type="text"] { flex: 1 1 220px; }

.stack { display: grid; gap: .9rem; }
.stack-sm { display: grid; gap: .55rem; margin-top: 1rem; }

.field { display: grid; gap: .35rem; font-size: .86rem; color: var(--muted); }

input[type="text"], input[type="password"] {
  width: 100%;
  padding: .68rem .8rem;
  border-radius: 10px;
  border: 1px solid var(--border);
  background: rgba(8, 13, 24, .72);
  color: var(--text);
  font: inherit;
  font-size: .95rem;
  transition: border-color .15s ease, box-shadow .15s ease;
}

input[type="text"]:focus, input[type="password"]:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(56, 189, 248, .17);
}

/* ------------------------------------------------------------------ flashes */

.flashes { margin-bottom: 1.1rem; display: grid; gap: .5rem; }

.flash {
  padding: .75rem 1rem;
  border-radius: 10px;
  border: 1px solid var(--border);
  background: var(--bg-soft);
  font-size: .92rem;
}

.flash-error { color: #fecaca; border-color: rgba(248, 113, 113, .42); background: rgba(248, 113, 113, .11); }
.flash-success { color: #bbf7d0; border-color: rgba(52, 211, 153, .42); background: rgba(52, 211, 153, .11); }
.flash-warning { color: #fde68a; border-color: rgba(251, 191, 36, .42); background: rgba(251, 191, 36, .1); }

/* ------------------------------------------------------------------- login */

.login-body { display: grid; place-items: center; padding: 2rem 1.25rem; }

.login-card {
  width: min(400px, 100%);
  background: linear-gradient(180deg, var(--card-hi), var(--card));
  border: 1px solid var(--border);
  border-radius: 18px;
  padding: 2.1rem 1.75rem 1.75rem;
  box-shadow: 0 30px 70px -34px rgba(0, 0, 0, .95);
}

.login-head { text-align: center; margin-bottom: 1.4rem; }
.login-head h1 { font-size: 1.3rem; margin-bottom: .25rem; }
.login-head p { margin: 0; font-size: .9rem; }
.login-card .flash { margin-bottom: 1rem; }

/* ------------------------------------------------------------------ detail */

.detail-layout {
  display: grid;
  grid-template-columns: minmax(0, 320px) minmax(0, 1fr);
  gap: 1.25rem;
  align-items: start;
}

.detail-layout .card { margin-bottom: 1.25rem; }

.qr-wrap {
  background: #fff;
  border-radius: 12px;
  padding: .75rem;
  display: grid;
  place-items: center;
  margin: .25rem 0 .25rem;
}

.qr-wrap svg { width: 100%; max-width: 260px; height: auto; display: block; }

.danger-zone {
  display: flex;
  flex-wrap: wrap;
  gap: .5rem;
  margin-top: 1.1rem;
  padding-top: 1rem;
  border-top: 1px solid var(--border);
}

.danger-zone form { margin: 0; }

.config-box {
  margin: 0;
  padding: 1rem;
  border-radius: 10px;
  border: 1px solid var(--border);
  background: rgba(6, 10, 19, .85);
  color: #cbd5e1;
  font-family: ui-monospace, SFMono-Regular, "SF Mono", Menlo, Consolas, monospace;
  font-size: .82rem;
  line-height: 1.5;
  overflow-x: auto;
  white-space: pre;
}

@media (max-width: 840px) {
  .detail-layout { grid-template-columns: 1fr; }
}

@media (max-width: 560px) {
  .shell { padding: 1.4rem 1rem 3rem; }
  h1 { font-size: 1.35rem; }
  .page-head { flex-direction: column; }
  .meta { grid-template-columns: 1fr; }
  .peer-actions .btn, .peer-actions form { flex: 1 1 auto; }
  .peer-actions .btn { width: 100%; }
}