:root {
  --bg: #07110e;
  --panel: rgba(12, 20, 17, 0.9);
  --panel-2: #111b17;
  --line: rgba(172, 205, 184, 0.28);
  --text: #f0f6ef;
  --muted: #aab9af;
  --green: #65d893;
  --amber: #ffc857;
  --red: #ff6b6b;
  --blue: #67b7ff;
  --shadow: 0 22px 70px rgba(0, 0, 0, 0.36);
}

* { 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 18% 8%, rgba(101, 216, 147, 0.16), transparent 30%),
    radial-gradient(circle at 86% 16%, rgba(103, 183, 255, 0.12), transparent 28%),
    linear-gradient(135deg, #07110e 0%, #111b17 48%, #161814 100%);
  overflow-x: hidden;
  -webkit-tap-highlight-color: transparent;
}

.grid-bg {
  position: fixed;
  inset: 0;
  pointer-events: none;
  opacity: 0.15;
  background:
    linear-gradient(rgba(255,255,255,0.05) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,0.05) 1px, transparent 1px);
  background-size: 44px 44px;
}

.app-shell {
  position: relative;
  width: min(1480px, 100%);
  margin: 0 auto;
  padding: 18px;
}

.topbar,
.sidebar,
.hud,
.paper-panel,
.answer-panel {
  border: 1px solid var(--line);
  background: var(--panel);
  box-shadow: var(--shadow);
  backdrop-filter: blur(16px);
}

.topbar {
  display: flex;
  justify-content: space-between;
  gap: 16px;
  align-items: center;
  padding: 18px;
}

.eyebrow {
  margin: 0 0 6px;
  color: var(--green);
  font-size: 0.75rem;
  font-weight: 900;
  text-transform: uppercase;
}

h1, h2, h3, p { margin-top: 0; }
h1 { margin-bottom: 0; font-size: clamp(1.7rem, 3vw, 3rem); line-height: 1.05; }
h2 { margin-bottom: 10px; line-height: 1.14; }

.status-strip {
  display: grid;
  grid-template-columns: repeat(3, minmax(90px, 1fr));
  gap: 8px;
}

.status-strip > div,
.hud > div {
  padding: 11px 12px;
  background: rgba(255,255,255,0.055);
  border: 1px solid rgba(255,255,255,0.07);
}

.status-strip span,
.muted,
.intel-grid span {
  display: block;
  color: var(--muted);
  font-size: 0.74rem;
}

.status-strip strong,
.hud strong {
  display: block;
  color: var(--amber);
  font-size: 1.1rem;
}

.layout {
  display: grid;
  grid-template-columns: 320px minmax(0, 1fr);
  gap: 16px;
  margin-top: 16px;
}

.sidebar {
  position: sticky;
  top: 16px;
  align-self: start;
  padding: 16px;
}

.operator-card {
  display: grid;
  grid-template-columns: 54px 1fr;
  gap: 12px;
  align-items: center;
  margin-bottom: 16px;
  padding: 12px;
  border: 1px solid rgba(255, 200, 87, 0.28);
  background: rgba(255, 200, 87, 0.1);
}

.avatar {
  width: 54px;
  height: 54px;
  border: 2px solid var(--green);
  border-radius: 50%;
  background:
    radial-gradient(circle, var(--green) 0 10%, transparent 11% 24%, rgba(103,183,255,0.4) 25% 28%, transparent 29%),
    rgba(0, 0, 0, 0.22);
}

#missionBrief,
.small-note {
  color: var(--muted);
  line-height: 1.5;
}

.small-note {
  margin-bottom: 0;
  font-size: 0.78rem;
}

.intel-grid {
  display: grid;
  gap: 8px;
  margin: 14px 0;
}

.intel-grid > div {
  padding: 10px;
  border: 1px solid rgba(255,255,255,0.08);
  background: rgba(0,0,0,0.18);
}

.day-nav {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 8px;
  margin: 14px 0;
}

button {
  border: 1px solid var(--line);
  border-radius: 0;
  min-height: 46px;
  padding: 10px 12px;
  color: var(--text);
  background: rgba(255,255,255,0.06);
  font: inherit;
  font-weight: 850;
  cursor: pointer;
}

button:hover { filter: brightness(1.08); }
.day-nav button.active,
.primary-btn {
  color: #06100b;
  background: linear-gradient(135deg, var(--green), var(--amber));
}

.workspace {
  min-width: 0;
  display: grid;
  gap: 14px;
}

.hud {
  display: grid;
  grid-template-columns: repeat(3, minmax(90px, 1fr)) minmax(220px, 1.6fr);
  gap: 8px;
  padding: 10px;
}

.radio {
  color: var(--blue);
  line-height: 1.35;
}

.radio.pulse { animation: pulse 320ms ease; }
@keyframes pulse {
  0% { transform: translateY(0); }
  50% { transform: translateY(-2px); border-color: rgba(255,200,87,0.45); }
  100% { transform: translateY(0); }
}

.paper-panel,
.answer-panel {
  overflow: hidden;
}

.paper-toolbar,
.panel-heading {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  align-items: center;
  padding: 12px;
  border-bottom: 1px solid var(--line);
  background: rgba(0,0,0,0.2);
}

.tool-btn {
  min-height: 38px;
  padding: 8px 10px;
}

.paper-scroll {
  max-height: 72vh;
  overflow: auto;
  padding: 12px;
  background: #e8ebe6;
}

.image-alert {
  border: 1px solid rgba(244, 117, 96, 0.6);
  background: rgba(244, 117, 96, 0.12);
  color: #541b13;
  border-radius: 6px;
  padding: 14px;
  font-size: 0.86rem;
  line-height: 1.45;
}

#questionImage {
  display: block;
  width: 100%;
  min-width: 520px;
  margin: 0 auto;
  box-shadow: 0 12px 40px rgba(0,0,0,0.32);
}

.answer-panel { padding-bottom: 14px; }
.panel-heading h2 { margin-bottom: 0; }

#answerArea {
  display: grid;
  gap: 10px;
  padding: 14px;
}

.task-card {
  padding: 14px;
  border: 1px solid var(--line);
  background:
    linear-gradient(90deg, rgba(103,183,255,0.08), transparent 52%),
    rgba(255,255,255,0.05);
}

.task-card.correct { border-color: rgba(101,216,147,0.76); }
.task-card.incorrect { border-color: rgba(255,107,107,0.76); }

.task-head {
  display: flex;
  justify-content: space-between;
  gap: 10px;
  align-items: center;
  margin-bottom: 10px;
}

.task-head h3 { margin: 0; }

.task-prompt {
  margin: 0 0 10px;
  color: #dfece3;
  line-height: 1.45;
  font-weight: 700;
}

.badge {
  padding: 6px 8px;
  color: #06100b;
  background: var(--amber);
  font-size: 0.75rem;
  font-weight: 1000;
}

.task-card.correct .badge { background: var(--green); }
.task-card.incorrect .badge { background: var(--red); }

.mcq-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 8px;
}

.target-btn {
  display: grid;
  grid-template-columns: 28px 1fr;
  gap: 8px;
  align-items: center;
  min-height: 58px;
  text-align: left;
  font-size: 0.95rem;
  background:
    radial-gradient(circle, rgba(255,200,87,0.55) 0 8%, transparent 9% 24%, rgba(101,216,147,0.18) 25% 28%, transparent 29%),
    rgba(0,0,0,0.18);
}

.target-btn strong {
  display: grid;
  place-items: center;
  width: 28px;
  height: 28px;
  color: #06100b;
  background: var(--amber);
}

.target-btn span {
  line-height: 1.25;
}

.target-btn.selected {
  color: #06100b;
  background: linear-gradient(135deg, var(--amber), var(--green));
}

.task-card.correct .target-btn.selected {
  background: linear-gradient(135deg, var(--green), #c9ffd9);
}

.task-card.incorrect .target-btn.selected {
  background: linear-gradient(135deg, var(--red), #ffc3c3);
}

.text-answer {
  width: 100%;
  min-height: 46px;
  padding: 10px 12px;
  border: 1px solid var(--line);
  color: var(--text);
  background: rgba(0,0,0,0.24);
  font: inherit;
}

.secondary-btn {
  margin-top: 8px;
}

.feedback {
  display: none;
  margin: 10px 0 0;
  padding: 10px;
  color: var(--muted);
  border-left: 4px solid var(--blue);
  background: rgba(103,183,255,0.1);
  line-height: 1.45;
}

.task-card.show-feedback .feedback,
.task-card.correct .feedback,
.task-card.incorrect .feedback {
  display: block;
}

@media (max-width: 980px) {
  .topbar,
  .layout {
    display: grid;
    grid-template-columns: 1fr;
  }
  .sidebar {
    position: static;
  }
  .hud {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
  .radio {
    grid-column: 1 / -1;
  }
}

@media (max-width: 640px) {
  .app-shell { padding: 10px; }
  .status-strip,
  .hud,
  .day-nav,
  .mcq-grid {
    grid-template-columns: 1fr;
  }
  .paper-toolbar,
  .panel-heading {
    align-items: flex-start;
    flex-direction: column;
  }
  #questionImage {
    min-width: 440px;
  }
}