:root {
  --bg: #0b0f17;
  --bg-elev: #121826;
  --bg-card: #151d2e;
  --line: #253247;
  --text: #e6edf7;
  --muted: #8595ad;
  --accent: #38e8b0;
  --accent-dim: #1c9d78;
  --warn: #ffb454;
  --danger: #ff6b6b;
  --locked: #4a5670;
  --radius: 14px;
  --mono: "SF Mono", "JetBrains Mono", "Fira Code", ui-monospace, Menlo, Consolas, monospace;
  --sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
  background: var(--bg);
  color: var(--text);
  font-family: var(--sans);
  -webkit-font-smoothing: antialiased;
}

body {
  min-height: 100dvh;
  background-image:
    radial-gradient(1200px 600px at 50% -10%, rgba(56,232,176,0.08), transparent 70%),
    linear-gradient(transparent 95%, rgba(56,232,176,0.04) 95%),
    linear-gradient(90deg, transparent 95%, rgba(56,232,176,0.04) 95%);
  background-size: auto, 28px 28px, 28px 28px;
}

.hidden { display: none !important; }

/* --- Login gate --- */
.gate {
  min-height: 100dvh;
  display: grid;
  place-items: center;
  padding: 24px;
}
.gate-inner {
  width: 100%;
  max-width: 380px;
  text-align: center;
  background: var(--bg-elev);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 40px 28px;
  box-shadow: 0 20px 60px rgba(0,0,0,0.5);
}
.crest {
  color: var(--accent);
  text-shadow: 0 0 18px rgba(56,232,176,0.6);
}
.gate .crest { font-size: 42px; display: block; margin-bottom: 8px; }
.gate h1 {
  font-family: var(--mono);
  letter-spacing: 6px;
  font-size: 20px;
  margin: 0 0 8px;
}
.tagline { color: var(--muted); font-size: 14px; margin: 0 0 24px; }

form { display: flex; flex-direction: column; gap: 10px; text-align: left; }
label { font-size: 12px; color: var(--muted); text-transform: uppercase; letter-spacing: 1.5px; }
input, textarea {
  width: 100%;
  background: var(--bg);
  border: 1px solid var(--line);
  border-radius: 10px;
  color: var(--text);
  padding: 13px 14px;
  font-size: 16px;
  font-family: var(--mono);
  outline: none;
  transition: border-color .15s;
}
input:focus, textarea:focus { border-color: var(--accent); }

input.shake {
  border-color: var(--danger);
  animation: shake 0.4s cubic-bezier(.36,.07,.19,.97);
}
@keyframes shake {
  10%, 90% { transform: translateX(-1px); }
  20%, 80% { transform: translateX(2px); }
  30%, 50%, 70% { transform: translateX(-4px); }
  40%, 60% { transform: translateX(4px); }
}

button {
  margin-top: 6px;
  background: linear-gradient(180deg, var(--accent), var(--accent-dim));
  color: #04231a;
  border: none;
  border-radius: 10px;
  padding: 14px;
  font-size: 15px;
  font-weight: 700;
  letter-spacing: 1px;
  cursor: pointer;
  transition: transform .08s, filter .15s;
}
button:active { transform: translateY(1px); }
button:disabled { filter: grayscale(0.6) brightness(0.7); cursor: not-allowed; }

.error { color: var(--danger); font-size: 13px; min-height: 16px; margin: 4px 0 0; }

/* --- Top bar --- */
.topbar {
  position: sticky;
  top: 0;
  z-index: 5;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 14px 16px calc(14px);
  padding-top: max(14px, env(safe-area-inset-top));
  background: rgba(11,15,23,0.85);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--line);
}
.brand {
  font-family: var(--mono);
  letter-spacing: 3px;
  font-size: 13px;
  font-weight: 700;
  display: flex;
  align-items: center;
  gap: 8px;
}
.brand .crest { font-size: 16px; }
.agent { display: flex; align-items: center; gap: 12px; }
.agent-name {
  font-family: var(--mono);
  font-size: 13px;
  color: var(--accent);
  cursor: pointer;
  border-bottom: 1px dashed rgba(56,232,176,0.5);
}
.agent-name:active { opacity: 0.7; }
.agent-name-input {
  width: 130px;
  padding: 4px 8px;
  font-size: 13px;
  font-family: var(--mono);
  background: var(--bg);
  border: 1px solid var(--accent);
  border-radius: 8px;
  color: var(--text);
}
.gps {
  font-family: var(--mono);
  font-size: 11px;
  color: var(--danger);
  border: 1px solid var(--line);
  border-radius: 20px;
  padding: 3px 8px;
  transition: color .3s;
}
.gps.ok { color: var(--accent); }
.gps.pending { color: var(--warn); }

/* --- Progress --- */
.progress-wrap {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 14px 16px 4px;
}
.progress-track {
  flex: 1;
  height: 8px;
  background: var(--bg-card);
  border: 1px solid var(--line);
  border-radius: 20px;
  overflow: hidden;
}
.progress-fill {
  height: 100%;
  width: 0%;
  background: linear-gradient(90deg, var(--accent-dim), var(--accent));
  box-shadow: 0 0 12px rgba(56,232,176,0.6);
  transition: width .5s cubic-bezier(.2,.8,.2,1);
}
.progress-label {
  font-family: var(--mono);
  font-size: 11px;
  color: var(--muted);
  white-space: nowrap;
}

/* --- Feed / toasts --- */
.feed {
  position: fixed;
  left: 50%;
  bottom: calc(16px + env(safe-area-inset-bottom));
  transform: translateX(-50%);
  z-index: 30;
  width: min(92vw, 460px);
  display: flex;
  flex-direction: column;
  gap: 8px;
  pointer-events: none;
}
.toast {
  background: var(--bg-elev);
  border: 1px solid var(--accent-dim);
  border-left: 3px solid var(--accent);
  border-radius: 10px;
  padding: 12px 14px;
  font-size: 14px;
  box-shadow: 0 12px 30px rgba(0,0,0,0.5);
  animation: slideUp .3s ease;
}
.toast.warn { border-color: var(--warn); border-left-color: var(--warn); }
@keyframes slideUp {
  from { opacity: 0; transform: translateY(12px); }
  to { opacity: 1; transform: translateY(0); }
}

/* --- Challenges --- */
.challenges {
  display: grid;
  gap: 14px;
  padding: 16px;
  padding-bottom: 120px;
  max-width: 620px;
  margin: 0 auto;
}
.card {
  background: var(--bg-card);
  border: 1px solid var(--warn);
  border-radius: var(--radius);
  padding: 16px;
  cursor: pointer;
  position: relative;
  overflow: hidden;
  transition: border-color .15s, transform .08s;
}
.card:active { transform: scale(0.99); }
.card::before {
  content: "";
  position: absolute;
  inset: 0 auto 0 0;
  width: 3px;
  background: var(--warn);
  opacity: .6;
}
.card.done { border-color: var(--accent-dim); }
.card.done::before { background: var(--accent); opacity: 1; }

/* Ghosted, locked challenge placeholder. */
.card.ghost {
  border-style: dashed;
  border-color: var(--locked);
  background:
    repeating-linear-gradient(45deg, rgba(74,86,112,0.05) 0 10px, transparent 10px 20px),
    var(--bg-card);
  cursor: default;
}
.card.ghost:active { transform: none; }
.card.ghost::before { background: var(--locked); opacity: .5; }
.card.ghost .card-title { color: var(--locked); letter-spacing: 2px; font-family: var(--mono); font-size: 15px; }
.card.ghost .card-foot { color: var(--locked); }
.card.ghost .status .dot { background: var(--locked); box-shadow: none; }
.badge.lock { color: var(--locked); border-color: var(--locked); }
.card-desc.redacted {
  color: var(--locked);
  font-family: var(--mono);
  letter-spacing: 1px;
  user-select: none;
  filter: blur(0.4px);
  opacity: .7;
}
.card-photo {
  display: block;
  width: calc(100% + 32px);
  margin: -16px -16px 14px;
  height: 160px;
  object-fit: cover;
  border-radius: var(--radius) var(--radius) 0 0;
  border-bottom: 1px solid var(--line);
  background: var(--bg);
}
.card-head {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 10px;
}
.card-title { font-size: 17px; font-weight: 700; margin: 0; }
.badge {
  font-family: var(--mono);
  font-size: 10px;
  letter-spacing: 1px;
  padding: 3px 8px;
  border-radius: 20px;
  border: 1px solid var(--line);
  color: var(--muted);
  white-space: nowrap;
  text-transform: uppercase;
}
.badge.cat { color: var(--accent); border-color: var(--accent-dim); }
.card-desc { color: var(--muted); font-size: 14px; margin: 10px 0 0; line-height: 1.5; }
.card-foot {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-top: 12px;
  font-family: var(--mono);
  font-size: 11px;
}
.status {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  color: var(--muted);
}
.status .dot { width: 8px; height: 8px; border-radius: 50%; background: var(--warn); }
.status.done { color: var(--accent); }
.status.done .dot { background: var(--accent); box-shadow: 0 0 8px var(--accent); }
.type-tag { color: var(--muted); margin-left: auto; }

/* --- Empty --- */
.empty { text-align: center; color: var(--muted); padding: 60px 20px; font-family: var(--mono); }

/* --- Modal --- */
.modal {
  position: fixed;
  inset: 0;
  z-index: 40;
  background: var(--bg);
}
.modal-card {
  position: relative;
  width: 100%;
  height: 100dvh;
  background: var(--bg-elev);
  padding: max(26px, env(safe-area-inset-top)) 20px calc(26px + env(safe-area-inset-bottom));
  overflow-y: auto;
  animation: slideUp .25s ease;
}
/* Keep the content readable on wide screens even though the card is full-bleed. */
.modal-card > * { max-width: 640px; margin-left: auto; margin-right: auto; }
.modal-close {
  position: absolute;
  top: max(10px, env(safe-area-inset-top)); right: 12px;
  background: none;
  color: var(--muted);
  font-size: 30px;
  width: 44px; height: 44px;
  padding: 0;
  margin: 0;
  line-height: 1;
  z-index: 1;
}
.modal-close:active { transform: none; }
.modal h2 { margin: 0 8px 4px 0; font-size: 22px; }
.modal .meta { display: flex; gap: 8px; flex-wrap: wrap; margin: 10px 0 16px; }
.modal-photo {
  display: block;
  width: 100%;
  max-height: 46vh;
  object-fit: cover;
  border-radius: 10px;
  border: 1px solid var(--line);
  margin: 0 0 16px;
  background: var(--bg);
}
.modal .desc { color: var(--text); line-height: 1.6; margin: 0 0 18px; }
.coords {
  font-family: var(--mono);
  font-size: 13px;
  background: var(--bg);
  border: 1px solid var(--line);
  border-radius: 10px;
  padding: 12px 14px;
  margin: 0 0 18px;
  color: var(--accent);
}
.coords .lbl { color: var(--muted); display: block; font-size: 10px; letter-spacing: 1px; margin-bottom: 4px; }
.hint { font-size: 12px; color: var(--muted); margin: 8px 0 0; }
.solved-banner {
  background: rgba(56,232,176,0.1);
  border: 1px solid var(--accent-dim);
  border-radius: 10px;
  padding: 14px;
  color: var(--accent);
  font-family: var(--mono);
  font-size: 13px;
  text-align: center;
}
.dist {
  font-family: var(--mono);
  font-size: 13px;
  text-align: center;
  color: var(--muted);
  margin-top: 12px;
}