:root {
  color-scheme: dark;
  --bg: #050b12;
  --surface: #0a1521;
  --surface-2: #101f2f;
  --line: rgba(163, 205, 239, 0.14);
  --text: #eef8ff;
  --muted: #8ea6ba;
  --blue: #31bfff;
  --green: #4fd87f;
  --yellow: #ffd24a;
  --orange: #ff7a3d;
  --red: #ff5067;
  --shadow: 0 18px 50px rgba(0, 0, 0, 0.35);
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  min-height: 100vh;
  background:
    radial-gradient(circle at 10% 0%, rgba(49, 191, 255, 0.12), transparent 35%),
    linear-gradient(180deg, #07111d 0%, var(--bg) 62%);
  color: var(--text);
}

button, input, textarea { font: inherit; }

button { -webkit-tap-highlight-color: transparent; }

[hidden] { display: none !important; }

.app-shell {
  width: min(760px, 100%);
  min-height: 100vh;
  margin: 0 auto;
  padding: max(22px, env(safe-area-inset-top)) 18px max(28px, env(safe-area-inset-bottom));
}

.topbar,
.section-heading,
.event-meta,
.decision-actions {
  display: flex;
  align-items: center;
}

.topbar { justify-content: space-between; gap: 18px; margin-bottom: 24px; }

.cache-notice {
  display: grid;
  gap: 3px;
  margin: -8px 0 18px;
  padding: 12px 14px;
  border: 1px solid rgba(255, 210, 74, 0.34);
  border-radius: 14px;
  background: rgba(65, 49, 10, 0.34);
  color: #ffe58a;
  font-size: 0.78rem;
}

.cache-notice span { color: var(--muted); line-height: 1.4; }

h1, h2, h3, p { margin-top: 0; }

h1 { margin-bottom: 0; font-size: clamp(1.65rem, 5vw, 2.35rem); letter-spacing: -0.04em; }

h2 { margin-bottom: 8px; font-size: 1.35rem; letter-spacing: -0.025em; }

.eyebrow {
  margin-bottom: 4px;
  color: var(--blue);
  font-size: 0.7rem;
  font-weight: 800;
  letter-spacing: 0.16em;
}

.connection {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  color: var(--muted);
  font-size: 0.82rem;
}

.connection-dot { width: 9px; height: 9px; border-radius: 50%; background: var(--yellow); box-shadow: 0 0 12px currentColor; }
.connection[data-state="online"] .connection-dot { background: var(--green); }
.connection[data-state="offline"] .connection-dot { background: var(--red); }

.login-card,
.summary-card,
.event-card,
.dialog-shell {
  border: 1px solid var(--line);
  background: linear-gradient(145deg, rgba(16, 31, 47, 0.97), rgba(8, 18, 29, 0.98));
  box-shadow: var(--shadow);
}

.login-card { max-width: 460px; margin: 12vh auto 0; padding: 28px; border-radius: 24px; }
.login-card p:not(.eyebrow) { color: var(--muted); line-height: 1.55; }

label { display: grid; gap: 8px; color: var(--muted); font-size: 0.85rem; }

input, textarea {
  width: 100%;
  border: 1px solid var(--line);
  border-radius: 13px;
  background: #050d16;
  color: var(--text);
  padding: 13px 14px;
  outline: none;
}

input:focus, textarea:focus { border-color: var(--blue); box-shadow: 0 0 0 3px rgba(49, 191, 255, 0.12); }

.primary,
.decision-button {
  border: 0;
  border-radius: 13px;
  padding: 13px 18px;
  font-weight: 800;
  cursor: pointer;
}

.primary { width: 100%; margin-top: 16px; background: var(--blue); color: #00101a; }
.form-error { min-height: 1.25em; margin: 12px 0 0; color: #ff91a0; font-size: 0.86rem; }

.device-strip {
  display: flex;
  align-items: center;
  gap: 8px;
  margin: -10px 0 14px;
  color: var(--muted);
  font-size: 0.75rem;
}

.device-strip span {
  padding: 4px 7px;
  border: 1px solid var(--line);
  border-radius: 999px;
  color: var(--blue);
  font-size: 0.65rem;
  font-weight: 850;
  text-transform: uppercase;
}

.summary-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 10px; margin-bottom: 28px; }

.summary-card {
  min-width: 0;
  min-height: 86px;
  border-radius: 18px;
  padding: 14px;
  color: var(--text);
  text-align: left;
}

button.summary-card { cursor: pointer; }
.summary-card.active { border-color: rgba(49, 191, 255, 0.55); box-shadow: 0 0 0 1px rgba(49, 191, 255, 0.14), var(--shadow); }
.summary-card strong { display: block; overflow: hidden; font-size: 1.7rem; text-overflow: ellipsis; }
.summary-card span { color: var(--muted); font-size: 0.78rem; }

.section-heading { justify-content: space-between; margin-bottom: 13px; }
.section-heading h2 { margin: 0; }
.icon-button, .dialog-close { border: 1px solid var(--line); background: var(--surface-2); color: var(--text); cursor: pointer; }
.icon-button { width: 42px; height: 42px; border-radius: 50%; font-size: 1.35rem; }

.event-list { display: grid; gap: 11px; }
.event-card { overflow: hidden; border-radius: 18px; }
.event-card[data-severity="critical"] { border-color: rgba(255, 80, 103, 0.5); }
.event-card[data-severity="urgent"] { border-color: rgba(255, 122, 61, 0.46); }

.event-open {
  display: grid;
  grid-template-columns: 5px minmax(0, 1fr) auto;
  gap: 14px;
  width: 100%;
  border: 0;
  background: transparent;
  color: inherit;
  padding: 15px;
  text-align: left;
  cursor: pointer;
}

.severity-marker { width: 5px; height: 100%; min-height: 64px; border-radius: 8px; background: var(--blue); }
[data-severity="warning"] .severity-marker { background: var(--yellow); }
[data-severity="urgent"] .severity-marker { background: var(--orange); }
[data-severity="critical"] .severity-marker { background: var(--red); box-shadow: 0 0 14px rgba(255, 80, 103, 0.5); }
.event-copy { display: grid; min-width: 0; gap: 5px; }
.event-meta { justify-content: space-between; gap: 12px; color: var(--muted); font-size: 0.7rem; text-transform: uppercase; letter-spacing: 0.08em; }
.event-title { overflow: hidden; font-size: 1.02rem; text-overflow: ellipsis; white-space: nowrap; }
.event-message { display: -webkit-box; overflow: hidden; color: var(--muted); font-size: 0.88rem; line-height: 1.45; -webkit-box-orient: vertical; -webkit-line-clamp: 2; }
.event-result { color: var(--green); font-size: 0.8rem; font-weight: 750; }
.event-chevron { align-self: center; color: var(--muted); font-size: 1.7rem; }
.event-card[data-seen="false"] .event-title::after { content: ""; display: inline-block; width: 7px; height: 7px; margin-left: 8px; border-radius: 50%; background: var(--blue); vertical-align: middle; }

.empty-state { padding: 64px 20px; color: var(--muted); text-align: center; }
.empty-state > span { display: grid; width: 54px; height: 54px; margin: 0 auto 16px; place-items: center; border: 1px solid rgba(79, 216, 127, 0.35); border-radius: 50%; color: var(--green); font-size: 1.5rem; }
.empty-state h3 { margin-bottom: 6px; color: var(--text); }

.systems-list { display: grid; gap: 10px; }

.system-card {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  align-items: center;
  gap: 14px;
  min-height: 74px;
  padding: 14px 16px;
  border: 1px solid var(--line);
  border-radius: 17px;
  background: linear-gradient(145deg, rgba(16, 31, 47, 0.97), rgba(8, 18, 29, 0.98));
}

.system-card strong,
.system-card span { display: block; }
.system-card span { margin-top: 4px; color: var(--muted); font-size: 0.76rem; }
.system-state { color: var(--green); font-size: 0.78rem; font-weight: 850; }
.system-card[data-online="false"] .system-state { color: var(--red); }
.system-card[data-state="unconfigured"] .system-state,
.system-card[data-state="stale"] .system-state { color: var(--yellow); }

.decision-dialog { width: min(580px, calc(100% - 22px)); max-height: calc(100vh - 22px); border: 0; border-radius: 24px; padding: 0; background: transparent; color: var(--text); }
.decision-dialog::backdrop { background: rgba(0, 4, 9, 0.82); backdrop-filter: blur(7px); }
.dialog-shell { position: relative; max-height: calc(100vh - 22px); overflow: auto; border-radius: 24px; padding: 27px; }
.dialog-close { position: absolute; top: 15px; right: 15px; width: 38px; height: 38px; border-radius: 50%; font-size: 1.5rem; }
.dialog-message { color: var(--muted); line-height: 1.55; white-space: pre-wrap; }
.payload-list { display: grid; grid-template-columns: auto minmax(0, 1fr); gap: 8px 15px; margin: 20px 0; padding: 15px; border-radius: 15px; background: rgba(0, 0, 0, 0.18); }
.payload-list:empty { display: none; }
.payload-list dt { color: var(--muted); }
.payload-list dd { margin: 0; overflow-wrap: anywhere; text-align: right; }
.response-field { margin: 18px 0; }
.decision-actions { flex-wrap: wrap; justify-content: flex-end; gap: 10px; margin-top: 22px; }
.decision-button { min-width: 120px; background: #1b3043; color: var(--text); }
.decision-button[data-style="positive"] { background: var(--green); color: #04220f; }
.decision-button[data-style="negative"] { background: var(--red); color: #250108; }
.decision-button[data-style="warning"] { background: var(--yellow); color: #241b00; }
.decision-button:disabled, .primary:disabled { opacity: 0.55; cursor: wait; }

@media (max-width: 520px) {
  .app-shell { padding-inline: 12px; }
  .summary-card { min-height: 78px; padding: 12px; }
  .summary-card strong { font-size: 1.45rem; }
  .summary-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .dialog-shell { padding: 24px 18px; }
  .decision-actions { display: grid; grid-template-columns: 1fr 1fr; }
  .decision-button { min-width: 0; }
}

body[data-mode="tablet"] .app-shell { width: min(1080px, 100%); }
body[data-mode="tablet"] .event-list { grid-template-columns: repeat(2, minmax(0, 1fr)); }
body[data-mode="tablet"] [data-filter="systems"] { display: none; }
body[data-mode="tablet"] .summary-grid { grid-template-columns: repeat(3, minmax(0, 1fr)); }

@media (prefers-reduced-motion: no-preference) {
  .event-card { animation: enter 180ms ease both; }
  @keyframes enter { from { opacity: 0; transform: translateY(5px); } }
}