:root {
  color-scheme: dark;
  --bg: #07111f;
  --panel: rgba(15, 29, 47, .88);
  --line: rgba(148, 163, 184, .18);
  --text: #f3f7fb;
  --muted: #94a3b8;
  --cyan: #41d9d0;
  --blue: #5a8cff;
  --green: #53df9a;
  --red: #ff7185;
}

* { box-sizing: border-box; }
body {
  margin: 0;
  min-height: 100vh;
  color: var(--text);
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont,
    "Segoe UI", sans-serif;
  background:
    radial-gradient(circle at 12% 10%, rgba(25, 120, 163, .28), transparent 30rem),
    radial-gradient(circle at 90% 80%, rgba(44, 72, 164, .25), transparent 32rem),
    var(--bg);
}

body::before {
  content: "";
  position: fixed;
  inset: 0;
  pointer-events: none;
  opacity: .16;
  background-image: linear-gradient(rgba(255,255,255,.03) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,.03) 1px, transparent 1px);
  background-size: 34px 34px;
}

.shell { position: relative; width: min(1180px, calc(100% - 40px)); margin: 0 auto; padding: 56px 0 80px; }
header { display: flex; align-items: flex-start; justify-content: space-between; gap: 24px; margin-bottom: 34px; }
h1 { margin: 4px 0 8px; font-size: clamp(2.1rem, 5vw, 4.3rem); letter-spacing: -.055em; line-height: .98; }
h2 { margin: 6px 0 10px; font-size: 1.35rem; letter-spacing: -.02em; }
.eyebrow, .step { margin: 0; color: var(--cyan); font-size: .72rem; font-weight: 800; letter-spacing: .16em; text-transform: uppercase; }
.sub, .muted { color: var(--muted); line-height: 1.6; }
.sub { margin: 0; font-size: 1.02rem; }
.hidden { display: none !important; }

.card {
  padding: 28px;
  border: 1px solid var(--line);
  border-radius: 22px;
  background: var(--panel);
  box-shadow: 0 24px 90px rgba(0,0,0,.25);
  backdrop-filter: blur(18px);
}
.login-card { display: grid; grid-template-columns: 1fr minmax(280px, 420px); gap: 56px; align-items: center; }
.grid { display: grid; grid-template-columns: minmax(300px, .76fr) minmax(420px, 1.24fr); gap: 20px; }

form { display: grid; gap: 16px; }
label { display: grid; gap: 8px; color: #c9d5e4; font-size: .82rem; font-weight: 700; }
input {
  width: 100%;
  border: 1px solid rgba(148, 163, 184, .28);
  border-radius: 12px;
  outline: none;
  padding: 13px 14px;
  color: var(--text);
  background: rgba(3, 10, 20, .7);
  font: inherit;
}
input:focus { border-color: var(--cyan); box-shadow: 0 0 0 3px rgba(65, 217, 208, .12); }
button {
  border: 0;
  border-radius: 12px;
  padding: 13px 18px;
  color: #031015;
  background: linear-gradient(135deg, var(--cyan), #75b7ff);
  font: inherit;
  font-weight: 850;
  cursor: pointer;
}
button:disabled { opacity: .5; cursor: wait; }
button.quiet { padding: 8px 12px; color: var(--text); background: rgba(255,255,255,.08); }
.account { display: flex; align-items: center; gap: 10px; color: var(--muted); font-size: .84rem; }
.error { min-height: 1.2em; margin: 0; color: var(--red); font-size: .82rem; }

.firmware { display: grid; gap: 6px; margin: 4px 0; padding: 14px; border: 1px solid var(--line); border-radius: 12px; background: rgba(3, 10, 20, .45); }
.firmware span { color: var(--muted); font-size: .72rem; text-transform: uppercase; letter-spacing: .12em; }
.firmware code { overflow: hidden; color: #92a8c0; font-size: .68rem; text-overflow: ellipsis; }
.confirm { grid-template-columns: auto 1fr; align-items: start; color: var(--muted); font-weight: 500; line-height: 1.45; }
.confirm input { width: 18px; margin-top: 2px; accent-color: var(--cyan); }

.monitor-head { display: flex; justify-content: space-between; gap: 16px; align-items: flex-start; }
.badge { padding: 7px 10px; border: 1px solid var(--line); border-radius: 999px; font-size: .67rem; font-weight: 900; letter-spacing: .08em; }
.badge.working { color: #9fbaff; background: rgba(90,140,255,.1); }
.badge.downloading { color: var(--cyan); background: rgba(65,217,208,.1); }
.badge.success { color: var(--green); background: rgba(83,223,154,.1); }
.badge.danger { color: var(--red); background: rgba(255,113,133,.1); }
.progress-track { height: 12px; margin: 22px 0; overflow: hidden; border-radius: 999px; background: rgba(255,255,255,.07); }
.progress-bar { width: 0; height: 100%; border-radius: inherit; background: linear-gradient(90deg, var(--blue), var(--cyan)); transition: width .25s ease; box-shadow: 0 0 22px rgba(65,217,208,.45); }
.metrics { display: grid; grid-template-columns: repeat(4, 1fr); gap: 10px; }
.metrics div { padding: 12px; border: 1px solid var(--line); border-radius: 12px; background: rgba(3,10,20,.35); }
.metrics span { display: block; color: var(--muted); font-size: .66rem; text-transform: uppercase; letter-spacing: .08em; }
.metrics strong { display: block; margin-top: 6px; font-size: .82rem; }
.timeline { max-height: 310px; margin: 24px 0 0; padding: 0; overflow-y: auto; list-style: none; }
.timeline li { display: grid; grid-template-columns: 12px 1fr; gap: 11px; padding: 10px 0; border-top: 1px solid var(--line); }
.timeline .placeholder { display: block; color: var(--muted); font-size: .82rem; line-height: 1.55; }
.event-dot { width: 8px; height: 8px; margin-top: 6px; border-radius: 50%; background: var(--blue); }
.event-dot.downloading { background: var(--cyan); box-shadow: 0 0 12px var(--cyan); }
.event-dot.success { background: var(--green); }
.event-dot.danger { background: var(--red); }
.event-time { display: block; color: var(--muted); font-size: .68rem; }
.event-message { display: block; margin-top: 2px; font-size: .82rem; font-weight: 650; }

@media (max-width: 860px) {
  .login-card, .grid { grid-template-columns: 1fr; }
  .login-card { gap: 24px; }
  .metrics { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 560px) {
  .shell { width: min(100% - 24px, 1180px); padding-top: 28px; }
  header { display: block; }
  .account { margin-top: 18px; }
  .card { padding: 20px; border-radius: 17px; }
}