/* =========================================
   NexusCode Scanner — Mobile-first CSS
   ========================================= */

:root {
  --bg: #050c18;
  --bg2: #071020;
  --bg3: #0a1828;
  --fg: #e8eef4;
  --fg2: #8fa3b8;
  --accent: #00e5ff;
  --accent-dim: rgba(0, 229, 255, 0.12);
  --accent-glow: rgba(0, 229, 255, 0.25);
  --warn: #ffb800;
  --warn-dim: rgba(255, 184, 0, 0.15);
  --danger: #ff4d4d;
  --green: #00e87a;
  --card: #0a1a2e;
  --border: rgba(0, 229, 255, 0.12);
  --font-display: 'Chakra Petch', monospace;
  --font-body: 'DM Sans', sans-serif;
}

* { box-sizing: border-box; margin: 0; padding: 0; }

body {
  background: var(--bg);
  color: var(--fg);
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

.scan-page {
  min-height: 100vh;
  padding: 80px 16px 80px;
  max-width: 600px;
  margin: 0 auto;
}

/* ── SCREENS ── */
.screen { display: none; }
.screen.active { display: block; }

/* ── CONNECT SCREEN ── */
.scan-hero {
  text-align: center;
  padding-top: 20px;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 20px;
}

.scan-pulse {
  position: relative;
  width: 64px;
  height: 64px;
}
.scan-pulse svg { position: relative; z-index: 1; }
.pulse-ring {
  position: absolute;
  inset: 0;
  border-radius: 50%;
  border: 1px solid var(--accent);
  animation: ping 1.5s ease-out infinite;
  opacity: 0.4;
}
@keyframes ping {
  0% { transform: scale(1); opacity: 0.4; }
  100% { transform: scale(1.6); opacity: 0; }
}

.scan-hero h1 {
  font-family: var(--font-display);
  font-size: 28px;
  font-weight: 700;
  letter-spacing: -0.02em;
}

.scan-sub {
  color: var(--fg2);
  font-size: 15px;
  line-height: 1.6;
  max-width: 320px;
}

/* Adapter selection */
.adapter-options {
  display: flex;
  gap: 12px;
  width: 100%;
  max-width: 360px;
}

.adapter-card {
  flex: 1;
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 16px 12px;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 6px;
  cursor: pointer;
  transition: border-color 0.2s, background 0.2s;
  color: var(--fg2);
}
.adapter-card.selected {
  border-color: var(--accent);
  background: var(--accent-dim);
  color: var(--accent);
}
.adapter-card span {
  font-family: var(--font-display);
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.04em;
}
.adapter-card small { font-size: 11px; color: var(--fg2); }

/* WiFi config */
.wifi-config {
  width: 100%;
  max-width: 320px;
  display: none;
  flex-direction: column;
  gap: 10px;
  text-align: left;
}
.wifi-config.visible { display: flex; }

.wifi-config label {
  font-family: var(--font-display);
  font-size: 12px;
  color: var(--fg2);
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

.wifi-config input {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 12px 14px;
  color: var(--fg);
  font-family: var(--font-display);
  font-size: 15px;
  width: 100%;
  outline: none;
  transition: border-color 0.2s;
}
.wifi-config input:focus { border-color: var(--accent); }

/* Buttons */
.scan-btn {
  display: flex;
  align-items: center;
  gap: 8px;
  background: var(--accent);
  color: var(--bg);
  border: none;
  border-radius: 12px;
  padding: 16px 32px;
  font-family: var(--font-display);
  font-size: 15px;
  font-weight: 700;
  letter-spacing: 0.04em;
  cursor: pointer;
  transition: opacity 0.2s, transform 0.15s;
  width: 100%;
  max-width: 320px;
  justify-content: center;
}
.scan-btn:hover { opacity: 0.9; transform: scale(0.98); }
.scan-btn:active { transform: scale(0.97); }
.scan-btn.loading { opacity: 0.6; pointer-events: none; }

.demo-btn {
  background: transparent;
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 12px 24px;
  color: var(--fg2);
  font-family: var(--font-display);
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.04em;
  cursor: pointer;
  transition: border-color 0.2s, color 0.2s;
  width: 100%;
  max-width: 320px;
}
.demo-btn:hover { border-color: var(--accent); color: var(--accent); }

.scan-hint {
  font-size: 12px;
  color: var(--fg2);
  opacity: 0.6;
  max-width: 280px;
}

/* ── SCANNING SCREEN ── */
.scanning-ui {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 24px;
  padding-top: 40px;
}

.scan-progress-ring { position: relative; }
.ring-label {
  position: absolute;
  inset: 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 2px;
}
.ring-label span {
  font-family: var(--font-display);
  font-size: 28px;
  font-weight: 700;
  color: var(--accent);
}
.ring-label small {
  font-size: 11px;
  color: var(--fg2);
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

#scan-status {
  font-family: var(--font-display);
  font-size: 15px;
  color: var(--fg2);
  letter-spacing: 0.04em;
  text-align: center;
}

/* Systems grid */
.systems-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 10px;
  width: 100%;
}

.sys-item {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 14px 10px;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 6px;
  transition: border-color 0.3s;
}

.sys-icon {
  font-size: 20px;
  color: var(--fg2);
  line-height: 1;
}

.sys-item span {
  font-family: var(--font-display);
  font-size: 11px;
  color: var(--fg2);
  letter-spacing: 0.04em;
}

.sys-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--fg2);
  opacity: 0.4;
  transition: background 0.4s, box-shadow 0.4s;
}
.sys-dot.ok { background: var(--green); opacity: 1; box-shadow: 0 0 6px var(--green); }
.sys-dot.warn { background: var(--warn); opacity: 1; box-shadow: 0 0 6px var(--warn); }
.sys-dot.critical { background: var(--danger); opacity: 1; box-shadow: 0 0 6px var(--danger); }
.sys-dot.scanning { animation: blink 0.6s infinite; }

@keyframes blink { 0%, 100% { opacity: 1; } 50% { opacity: 0.3; } }

/* ── RESULTS SCREEN ── */
.results-header {
  margin-bottom: 20px;
}

.results-score {
  display: flex;
  align-items: center;
  gap: 20px;
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 20px;
}

.score-ring { position: relative; flex-shrink: 0; }
.score-label {
  position: absolute;
  inset: 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 1px;
}
.score-label span {
  font-family: var(--font-display);
  font-size: 22px;
  font-weight: 700;
  color: var(--fg);
}
.score-label small {
  font-size: 10px;
  color: var(--fg2);
  text-transform: uppercase;
  letter-spacing: 0.06em;
}

.score-info h2 {
  font-family: var(--font-display);
  font-size: 18px;
  font-weight: 600;
  margin-bottom: 4px;
}
.score-info p { font-size: 13px; color: var(--fg2); }

/* Filters */
.results-filters {
  display: flex;
  gap: 8px;
  margin-bottom: 16px;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  padding-bottom: 4px;
}

.filter-btn {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 20px;
  padding: 8px 16px;
  color: var(--fg2);
  font-family: var(--font-display);
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.04em;
  cursor: pointer;
  white-space: nowrap;
  transition: border-color 0.2s, color 0.2s, background 0.2s;
}
.filter-btn.active {
  border-color: var(--accent);
  background: var(--accent-dim);
  color: var(--accent);
}
.filter-btn.critical.active { border-color: var(--danger); background: rgba(255,77,77,0.1); color: var(--danger); }
.filter-btn.urgent.active { border-color: var(--warn); background: var(--warn-dim); color: var(--warn); }
.filter-btn.monitor.active { border-color: var(--accent); background: var(--accent-dim); color: var(--accent); }

/* Codes list */
.codes-list {
  display: flex;
  flex-direction: column;
  gap: 12px;
  margin-bottom: 24px;
}

.code-card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 14px;
  overflow: hidden;
  transition: border-color 0.3s;
}
.code-card.severity-critical { border-color: rgba(255,77,77,0.3); }
.code-card.severity-urgent { border-color: rgba(255,184,0,0.3); }
.code-card.hidden { display: none; }

.code-card-head {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 14px 16px;
  background: rgba(255,255,255,0.02);
  border-bottom: 1px solid var(--border);
}

.code-badge {
  font-family: var(--font-display);
  font-size: 10px;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  padding: 4px 9px;
  border-radius: 4px;
}
.badge-critical { background: rgba(255,77,77,0.15); color: var(--danger); }
.badge-urgent { background: var(--warn-dim); color: var(--warn); }
.badge-monitor { background: var(--accent-dim); color: var(--accent); }
.badge-safe { background: rgba(0,232,122,0.1); color: var(--green); }

.code-id {
  font-family: var(--font-display);
  font-size: 16px;
  font-weight: 700;
  color: var(--fg);
  letter-spacing: 0.02em;
}

.code-system-tag {
  margin-left: auto;
  font-family: var(--font-display);
  font-size: 10px;
  color: var(--fg2);
  letter-spacing: 0.04em;
  text-transform: uppercase;
  background: rgba(255,255,255,0.05);
  padding: 3px 8px;
  border-radius: 4px;
}

.code-body { padding: 16px; }

.code-plain {
  font-size: 14px;
  color: var(--fg);
  line-height: 1.6;
  margin-bottom: 14px;
}

.code-cause {
  font-size: 13px;
  color: var(--fg2);
  line-height: 1.5;
  margin-bottom: 14px;
  padding: 10px 12px;
  background: rgba(255,255,255,0.03);
  border-radius: 8px;
  border-left: 3px solid var(--accent);
}

.code-fix {
  font-family: var(--font-display);
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.04em;
  color: var(--accent);
  display: flex;
  align-items: center;
  gap: 6px;
}

.code-fix::before {
  content: '→';
  color: var(--accent);
}

.ai-note {
  margin-top: 10px;
  padding: 12px;
  background: rgba(0,229,255,0.05);
  border: 1px solid rgba(0,229,255,0.15);
  border-radius: 8px;
  font-size: 13px;
  color: var(--fg2);
  line-height: 1.55;
  font-style: italic;
}

/* Rescan button */
.rescan-btn {
  display: flex;
  align-items: center;
  gap: 8px;
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 14px 24px;
  color: var(--fg);
  font-family: var(--font-display);
  font-size: 14px;
  font-weight: 600;
  letter-spacing: 0.04em;
  cursor: pointer;
  width: 100%;
  justify-content: center;
  transition: border-color 0.2s, color 0.2s;
}
.rescan-btn:hover { border-color: var(--accent); color: var(--accent); }

/* ── NAV overrides for scan page ── */
.nav { padding: 0 16px; }
.nav-inner { max-width: 100%; }

/* Footer */
.footer { padding: 30px 16px; }

/* ── RESPONSIVE ── */
@media (min-width: 600px) {
  .scan-page { padding: 100px 20px 80px; }
  .systems-grid { grid-template-columns: repeat(6, 1fr); }
  .scan-btn, .demo-btn { width: auto; min-width: 240px; }
}

/* Error state */
.error-banner {
  background: rgba(255,77,77,0.1);
  border: 1px solid rgba(255,77,77,0.3);
  border-radius: 10px;
  padding: 14px 16px;
  font-size: 13px;
  color: var(--danger);
  text-align: center;
  margin-bottom: 16px;
}

/* Error panel */
.error-panel {
  position: absolute;
  top: 0; left: 0; right: 0; bottom: 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: 40px 32px;
  gap: 14px;
  z-index: 10;
  background: rgba(5, 12, 24, 0.96);
  backdrop-filter: blur(6px);
}

.error-icon {
  width: 64px; height: 64px;
  border-radius: 50%;
  border: 1.5px solid;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 4px;
  position: relative;
}

.error-icon svg { position: absolute; }
.error-icon svg:not(.icon-signal) { display: none; }

/* Type-specific icon styling */
.error-icon--unreachable {
  background: rgba(255,77,77,0.1);
  border-color: rgba(255,77,77,0.3);
  color: var(--danger);
}
.error-icon--refused {
  background: rgba(255,184,0,0.1);
  border-color: rgba(255,184,0,0.3);
  color: var(--warn);
}
.error-icon--refused .icon-signal { display: none; }
.error-icon--refused .icon-shield { display: block; }
.error-icon--bridge {
  background: rgba(0,229,255,0.1);
  border-color: rgba(0,229,255,0.3);
  color: var(--accent);
}
.error-icon--bridge .icon-signal { display: none; }
.error-icon--bridge .icon-cloud { display: block; }

/* Error step list */
.error-steps {
  list-style: none;
  padding: 0;
  margin: 0;
  display: flex;
  flex-direction: column;
  gap: 8px;
  max-width: 300px;
}
.error-steps li {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  text-align: left;
  font-size: 13px;
  color: var(--fg2);
  line-height: 1.5;
}
.error-steps li::before {
  content: '';
  display: inline-block;
  width: 5px; height: 5px;
  border-radius: 50%;
  background: var(--accent);
  opacity: 0.7;
  flex-shrink: 0;
  margin-top: 6px;
}

.error-panel h3 {
  font-family: 'Chakra Petch', sans-serif;
  font-size: 22px;
  font-weight: 600;
  color: var(--danger);
  margin: 0;
}
.error-panel p {
  font-size: 14px;
  color: var(--fg2);
  max-width: 340px;
  line-height: 1.6;
  margin: 0;
}
.error-panel .error-actions {
  display: flex;
  flex-direction: column;
  gap: 12px;
  margin-top: 8px;
  width: 100%;
  max-width: 260px;
}
.error-panel .scan-btn,
.error-panel .demo-btn {
  width: 100%;
}