/* ═══════════════════════════════════════════════════════════════
   Agentic Operations Academy — "New Frontier" theme
   Built on the ThousandEyes brand system (te-brand-kit):
   TEAL-dominant dark palette, airy type, glow reserved for heroes.
   ═══════════════════════════════════════════════════════════════ */
@import url('https://fonts.googleapis.com/css2?family=Inter:ital,wght@0,200;0,300;0,400;0,600;0,700;1,300;1,400&display=swap');

:root {
  /* — TE brand accents — */
  --teal:        #0892A0;
  --te-orange:   #F15E22;
  --dark-teal:   #005E75;
  --green:       #74BF4B;
  --orange-2:    #FB7C32;
  --cyan:        #00BCEB;
  --navy:        #0D274D;
  --red:         #FF3B30;
  --yellow:      #FFD60A;
  --purple:      #BF5AF2;
  /* — structure — */
  --bg:          #121212;
  --bg-card:     #1A1A1A;
  --bg-card-2:   #232323;
  --text:        #E8E8E8;
  --text-muted:  #999999;
  --text-dim:    #555555;
  --border:      #334155;
  /* — state fills — */
  --state-normal-fill:  #0F1F22;
  --state-warning-fill: #2A1A00;
  --state-success-fill: #0E2310;
  --state-cyan-fill:    #001E26;
  /* — glow (hero + interactive only) — */
  --glow-teal:   0 0 12px rgba(8, 146, 160, 0.45);
  --glow-cyan:   0 0 10px rgba(0, 188, 235, 0.4);
  --glow-orange: 0 0 12px rgba(241, 94, 34, 0.45);
  --font-sans:  'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', system-ui, sans-serif;
  --font-mono:  ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  --ease: cubic-bezier(0.4, 0, 0.2, 1);
}

* { box-sizing: border-box; }

body {
  margin: 0;
  background:
    radial-gradient(1100px 500px at 85% -10%, rgba(8,146,160,0.10), transparent 60%),
    radial-gradient(900px 460px at -10% 108%, rgba(13,39,77,0.55), transparent 60%),
    var(--bg);
  color: var(--text);
  font: 300 16px/1.65 var(--font-sans);
  min-height: 100vh;
}

/* starfield canvas sits behind everything */
#starfield {
  position: fixed; inset: 0; z-index: -1; pointer-events: none;
}

a { color: var(--cyan); text-decoration: none; transition: color 120ms var(--ease); }
a:hover { color: var(--teal); text-decoration: none; }

/* ── Top bar ─────────────────────────────────────────────── */
.topbar {
  display: flex; justify-content: space-between; align-items: center;
  padding: 14px 32px;
  background: rgba(18,18,18,0.82);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid rgba(8,146,160,0.35);
  position: sticky; top: 0; z-index: 10;
}
.brand {
  font-weight: 200; font-size: 19px; letter-spacing: 0.14em;
  text-transform: uppercase; color: var(--text);
  display: flex; align-items: center; gap: 12px;
}
.brand:hover { color: var(--text); }
.brand .accent { color: var(--teal); font-weight: 400; }
.brand-mark {
  color: var(--te-orange); font-size: 14px;
  display: inline-flex; width: 26px; height: 26px;
  align-items: center; justify-content: center;
  border: 1px solid var(--teal); border-radius: 50%;
  box-shadow: var(--glow-teal);
}
.topbar nav { display: flex; align-items: center; gap: 20px; }
.topbar nav a {
  font-size: 12px; letter-spacing: 0.12em; text-transform: uppercase;
  color: var(--text-muted);
}
.topbar nav a:hover { color: var(--cyan); }
.who { color: var(--text-dim); font-size: 12px; letter-spacing: 0.06em; }

main { max-width: 1080px; margin: 0 auto; padding: 40px 24px 80px; }

footer {
  text-align: center; color: var(--text-dim); font-size: 12px;
  letter-spacing: 0.1em; text-transform: uppercase;
  padding: 28px; border-top: 1px solid var(--border);
}

/* ── Type ────────────────────────────────────────────────── */
h1 {
  font-weight: 200; font-size: 34px; letter-spacing: 0.01em;
  margin: 0.1em 0 0.35em; color: var(--text);
}
h2 {
  font-weight: 300; font-size: 20px; margin-top: 2em;
  color: var(--teal); letter-spacing: 0.04em;
}
h3 { font-weight: 400; font-size: 16px; }
.muted { color: var(--text-muted); font-size: 14.5px; }
.subtitle { color: var(--teal); font-style: italic; font-weight: 300; }

/* ── Cards ───────────────────────────────────────────────── */
.card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 22px 26px;
  margin: 16px 0;
  transition: border-color 220ms var(--ease), transform 220ms var(--ease),
              box-shadow 220ms var(--ease);
}
.grid .card { margin: 0; }
.card:hover { border-color: rgba(8,146,160,0.55); }
.grid a:hover { text-decoration: none; }
.grid {
  display: grid; grid-template-columns: 1fr 1fr; gap: 16px; margin: 18px 0;
}
@media (max-width: 780px) { .grid { grid-template-columns: 1fr; } }

/* ── HUD pills ───────────────────────────────────────────── */
.pill {
  display: inline-block; font-size: 10.5px; font-weight: 600;
  letter-spacing: 0.14em; text-transform: uppercase;
  padding: 3px 11px; border-radius: 999px; margin-right: 7px;
  border: 1px solid transparent;
}
.pill.live    { background: var(--state-success-fill); color: var(--green);  border-color: rgba(116,191,75,0.4); }
.pill.planned { background: var(--bg-card-2); color: var(--text-dim); border-color: var(--border); }
.pill.level   { background: var(--state-cyan-fill); color: var(--cyan); border-color: rgba(0,188,235,0.35); }
.pill.domain  { background: var(--state-warning-fill); color: var(--orange-2); border-color: rgba(241,94,34,0.35); }

/* ── Energy bar (progress) ───────────────────────────────── */
.progress {
  height: 7px; background: var(--bg-card-2); border-radius: 999px;
  overflow: hidden; margin: 14px 0 6px;
  border: 1px solid rgba(51,65,85,0.6);
}
.progress > div {
  height: 100%;
  background: linear-gradient(90deg, var(--dark-teal), var(--teal) 60%, var(--cyan));
  box-shadow: var(--glow-teal);
  border-radius: 999px;
  transition: width 400ms var(--ease);
}

/* ── Buttons ─────────────────────────────────────────────── */
.btn {
  display: inline-block;
  background: var(--teal); color: #04181B;
  font-weight: 600; font-size: 13px;
  letter-spacing: 0.1em; text-transform: uppercase;
  padding: 11px 24px; border-radius: 8px; border: 0; cursor: pointer;
  transition: box-shadow 220ms var(--ease), background 120ms var(--ease),
              transform 120ms var(--ease);
}
.btn:hover { background: #0AA5B5; box-shadow: var(--glow-teal); color: #04181B; }
.btn:active { transform: translateY(1px); }
.btn.secondary {
  background: transparent; color: var(--teal);
  border: 1px solid var(--teal);
}
.btn.secondary:hover { background: rgba(8,146,160,0.12); box-shadow: var(--glow-teal); }
.btn.orange { background: var(--te-orange); color: #1D0A00; }
.btn.orange:hover { background: var(--orange-2); box-shadow: var(--glow-orange); }

/* ── Forms ───────────────────────────────────────────────── */
input, select, textarea {
  width: 100%;
  background: var(--bg); border: 1px solid var(--border);
  color: var(--text); border-radius: 8px; padding: 11px 14px;
  font: 300 15px/1.5 var(--font-sans);
  margin: 6px 0 16px;
  transition: border-color 120ms var(--ease), box-shadow 120ms var(--ease);
}
input:focus, select:focus, textarea:focus {
  outline: none; border-color: var(--teal); box-shadow: var(--glow-teal);
}
textarea { min-height: 220px; font-family: var(--font-mono); font-size: 13.5px; }
label {
  font-size: 11px; letter-spacing: 0.14em; text-transform: uppercase;
  color: var(--text-muted);
}

.error {
  background: rgba(255,59,48,0.08); color: var(--red);
  border: 1px solid rgba(255,59,48,0.4);
  border-radius: 8px; padding: 11px 15px; margin-bottom: 16px; font-size: 14px;
}
.ok  { color: var(--green); font-weight: 600; }
.bad { color: var(--red);   font-weight: 600; }

/* ── Auth hero ───────────────────────────────────────────── */
.auth { max-width: 460px; margin: 7vh auto 0; }
.auth.card { padding: 34px 38px; }
.auth h1 { font-size: 28px; }
.hero-title {
  text-align: center; margin: 8vh 0 26px;
}
.hero-title .kicker {
  font-size: 11px; letter-spacing: 0.5em; text-transform: uppercase;
  color: var(--te-orange); margin-bottom: 14px;
}
.hero-title h1 {
  font-weight: 200; font-size: 42px; letter-spacing: 0.12em;
  text-transform: uppercase; margin: 0;
  text-shadow: 0 0 24px rgba(8,146,160,0.35);
}
.hero-title .subtitle { display: block; margin-top: 10px; font-size: 15px; }

/* ── Lesson & lab reading surface ────────────────────────── */
.lesson-body { line-height: 1.75; }
.lesson-body h1 { font-size: 27px; }
.lesson-body h2 {
  font-size: 19px; border: 0; padding: 0; margin-top: 2.1em;
}
.lesson-body p { max-width: 74ch; }
.lesson-body table, table.matrix {
  border-collapse: collapse; width: 100%; margin: 18px 0; font-size: 13.5px;
}
.lesson-body th, .lesson-body td, table.matrix th, table.matrix td {
  border: 1px solid var(--border); padding: 9px 12px;
  text-align: left; vertical-align: top;
}
.lesson-body th, table.matrix th {
  background: var(--state-cyan-fill); color: var(--cyan);
  font-weight: 600; font-size: 11.5px;
  letter-spacing: 0.08em; text-transform: uppercase;
}
.lesson-body tr:nth-child(even) td { background: rgba(35,35,35,0.5); }
.lesson-body code {
  background: var(--state-cyan-fill); color: var(--cyan);
  padding: 1px 7px; border-radius: 5px;
  font: 400 13px/1.5 var(--font-mono);
}
.lesson-body pre {
  background: #0D1517; border: 1px solid var(--border);
  border-left: 3px solid var(--teal);
  border-radius: 8px; padding: 16px 18px; overflow-x: auto;
}
.lesson-body pre code { background: none; padding: 0; color: var(--text); }
.lesson-body blockquote {
  border-left: 3px solid var(--te-orange);
  background: rgba(241,94,34,0.05);
  margin-left: 0; padding: 10px 18px;
  border-radius: 0 8px 8px 0;
  color: var(--text); font-size: 15px;
}
.lesson-body hr { border: 0; border-top: 1px solid var(--border); margin: 2em 0; }
.lesson-body strong { font-weight: 600; color: #F4F4F4; }

/* ── Diagrams ────────────────────────────────────────────── */
figure.diagram {
  margin: 26px 0; padding: 20px 20px 12px;
  background: #0D1517;
  border: 1px solid var(--border);
  border-radius: 12px;
}
figure.diagram svg { width: 100%; height: auto; display: block; }
figure.diagram figcaption {
  margin-top: 10px; font-size: 12.5px; font-style: italic;
  color: var(--teal); text-align: center;
}

/* ── Layout helpers ──────────────────────────────────────── */
.row {
  display: flex; justify-content: space-between; align-items: center;
  gap: 14px; flex-wrap: wrap;
}
.big {
  font-size: 44px; font-weight: 200; margin: 0; color: var(--text);
  text-shadow: 0 0 18px rgba(8,146,160,0.3);
}
.checklist span { margin-right: 16px; font-size: 13px; color: var(--text-muted); }

/* ── Quiz ────────────────────────────────────────────────── */
.quiz-q { margin-bottom: 22px; }
.quiz-q .opts label {
  display: block; color: var(--text);
  font-size: 14.5px; letter-spacing: 0; text-transform: none;
  background: var(--bg); border: 1px solid var(--border);
  border-left: 3px solid var(--border);
  border-radius: 8px; padding: 11px 15px; margin: 8px 0; cursor: pointer;
  transition: border-color 120ms var(--ease), background 120ms var(--ease);
}
.quiz-q .opts label:hover {
  border-color: var(--teal); border-left-color: var(--teal);
  background: var(--state-normal-fill);
}
.quiz-q input[type=radio] { width: auto; margin-right: 12px; accent-color: var(--teal); }
.explain {
  background: var(--state-normal-fill); border-left: 3px solid var(--teal);
  padding: 9px 15px; border-radius: 0 8px 8px 0;
  font-size: 13.5px; color: var(--text-muted); margin-top: 8px;
}

pre.submission {
  white-space: pre-wrap; background: var(--bg); border-radius: 8px;
  padding: 14px; margin-top: 10px; font-size: 13px; color: var(--text-muted);
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    transition-duration: 0.01ms !important;
  }
}