/* ─── Inter font ────────────────────────────────────────────────────────────── */
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;700&display=swap');

/* ─── Reset ─────────────────────────────────────────────────────────────────── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

/* ─── EduStonks palette — yellow + off-white ────────────────────────────────── */
:root {
  --yellow:        #FFC409;
  --yellow-dark:   #E5AF00;
  --yellow-deeper: #C99B00;
  --yellow-soft:   rgba(255,196,9,.13);
  --yellow-softer: rgba(255,196,9,.07);

  /* Surfaces */
  --bg:            #FEFDF5;   /* warm off-white */
  --surface:       #FFFFFF;
  --surface-hover: #FAFAF3;
  --border:        #EAE7D8;
  --border-focus:  #FFC409;

  /* Text — dark teal from the edusign logo */
  --text:          #1D3C47;
  --text-secondary:#5A6E75;
  --text-muted:    #9AABB2;

  /* Status */
  --success:       #2dd55b;
  --success-soft:  rgba(45,213,91,.12);
  --danger:        #c5000f;
  --danger-soft:   rgba(197,0,15,.09);
  --warning:       #FFC409;

  /* Misc */
  --radius:    10px;
  --radius-sm: 6px;
  --radius-lg: 16px;
  --shadow-sm: 0 1px 3px rgba(29,60,71,.07);
  --shadow:    0 4px 16px rgba(29,60,71,.10);
  --shadow-lg: 0 8px 32px rgba(29,60,71,.13);
  --transition: 140ms ease;
  --font: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
}

html { font-size: 16px; }
body {
  font-family: var(--font);
  background: var(--bg);
  color: var(--text);
  min-height: 100vh;
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
}
a { color: var(--text); text-decoration: underline; }
a:hover { color: var(--yellow-dark); }

/* ─── Navbar ────────────────────────────────────────────────────────────────── */
.navbar {
  display: flex;
  align-items: center;
  gap: 1rem;
  padding: 0 1.5rem;
  height: 60px;
  background: var(--surface);
  border-bottom: 1px solid var(--border);
  position: sticky;
  top: 0;
  z-index: 100;
  box-shadow: var(--shadow-sm);
}

.nav-brand {
  display: flex;
  align-items: center;
  gap: .6rem;
  flex-shrink: 0;
  text-decoration: none;
}
.nav-brand img {
  width: 32px;
  height: 32px;
  border-radius: 8px;
}
.nav-brand-name {
  font-weight: 700;
  font-size: 1.05rem;
  color: var(--text);
  letter-spacing: -.02em;
}

.nav-links {
  display: flex;
  gap: .2rem;
  flex: 1;
}

.nav-link {
  display: flex;
  align-items: center;
  gap: .4rem;
  padding: .42rem .8rem;
  border-radius: var(--radius-sm);
  color: var(--text-secondary);
  font-size: .875rem;
  font-weight: 500;
  transition: background var(--transition), color var(--transition);
  text-decoration: none;
}
.nav-link:hover { background: var(--yellow-softer); color: var(--text); text-decoration: none; }
.nav-link.active {
  background: var(--yellow-soft);
  color: var(--text);
  font-weight: 600;
}
.nav-link.active svg { color: var(--yellow-dark); }

.nav-user {
  display: flex;
  align-items: center;
  gap: .75rem;
  margin-left: auto;
  flex-shrink: 0;
}
.nav-username { font-size: .875rem; color: var(--text-secondary); font-weight: 500; }

/* ─── Main ──────────────────────────────────────────────────────────────────── */
.main-content { max-width: 880px; margin: 0 auto; padding: 1.75rem 1.25rem 4rem; }

.page-header {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  margin-bottom: 1.5rem;
  gap: 1rem;
}
.page-title { font-size: 1.5rem; font-weight: 700; letter-spacing: -.025em; color: var(--text); }
.page-subtitle { color: var(--text-secondary); font-size: .9rem; margin-top: .2rem; }

.section-header {
  display: flex;
  align-items: center;
  gap: .75rem;
  margin-bottom: .75rem;
}
.section-title { font-size: .9375rem; font-weight: 600; }

/* ─── Cards ─────────────────────────────────────────────────────────────────── */
.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow-sm);
  transition: box-shadow var(--transition), border-color var(--transition);
}
.card:hover { box-shadow: var(--shadow); }
.card-accent { border-color: var(--yellow); background: var(--yellow-softer); }
.card-body { padding: 1rem 1.25rem; }
.card-title { font-size: .9375rem; font-weight: 600; margin-bottom: .25rem; }
.card-desc { font-size: .875rem; color: var(--text-secondary); }

/* ─── Buttons ───────────────────────────────────────────────────────────────── */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: .4rem;
  padding: .55rem 1.1rem;
  border-radius: var(--radius-sm);
  font-family: var(--font);
  font-size: .875rem;
  font-weight: 600;
  cursor: pointer;
  border: none;
  transition: background var(--transition), box-shadow var(--transition), opacity var(--transition);
  white-space: nowrap;
  text-decoration: none;
  letter-spacing: -.01em;
}
.btn:disabled { opacity: .5; cursor: not-allowed; }
.btn:hover:not(:disabled) { text-decoration: none; }

/* Yellow primary — dark text for contrast */
.btn-primary {
  background: var(--yellow);
  color: var(--text);
  box-shadow: 0 2px 8px rgba(255,196,9,.35);
}
.btn-primary:hover:not(:disabled) {
  background: var(--yellow-dark);
  box-shadow: 0 4px 14px rgba(255,196,9,.45);
}

.btn-secondary {
  background: var(--surface);
  color: var(--text);
  border: 1.5px solid var(--border);
  box-shadow: var(--shadow-sm);
}
.btn-secondary:hover:not(:disabled) { background: var(--surface-hover); border-color: #d4d0bf; }

.btn-ghost { background: transparent; color: var(--text-secondary); }
.btn-ghost:hover:not(:disabled) { background: var(--yellow-softer); color: var(--text); }

.btn-microsoft {
  background: var(--surface);
  color: var(--text);
  border: 1.5px solid var(--border);
  box-shadow: var(--shadow-sm);
  font-weight: 500;
}
.btn-microsoft:hover:not(:disabled) { background: var(--surface-hover); }

.btn-full { width: 100%; }
.btn-sm { padding: .35rem .75rem; font-size: .8125rem; }
.btn-xs { padding: .2rem .5rem; font-size: .75rem; }

/* Spinner on yellow button — use dark color */
.btn-spinner {
  width: 14px; height: 14px;
  border: 2px solid rgba(29,60,71,.25);
  border-top-color: var(--text);
  border-radius: 50%;
  animation: spin .6s linear infinite;
}
@keyframes spin { to { transform: rotate(360deg); } }

/* ─── Forms ─────────────────────────────────────────────────────────────────── */
.form-group { margin-bottom: 1rem; }
.form-label {
  display: block;
  font-size: .78rem;
  font-weight: 600;
  color: var(--text-secondary);
  margin-bottom: .4rem;
  text-transform: uppercase;
  letter-spacing: .06em;
}

.form-input {
  width: 100%;
  background: var(--surface);
  border: 1.5px solid var(--border);
  border-radius: var(--radius-sm);
  color: var(--text);
  font-family: var(--font);
  font-size: .9rem;
  padding: .6rem .85rem;
  outline: none;
  transition: border-color var(--transition), box-shadow var(--transition);
}
.form-input:focus {
  border-color: var(--yellow);
  box-shadow: 0 0 0 3px rgba(255,196,9,.18);
}
.form-input::placeholder { color: var(--text-muted); }
.form-input--sm { padding: .4rem .7rem; font-size: .85rem; }

.input-wrapper { position: relative; }
.input-wrapper .form-input { padding-right: 2.5rem; }
.input-toggle {
  position: absolute; right: .65rem; top: 50%; transform: translateY(-50%);
  background: none; border: none; cursor: pointer; color: var(--text-muted); padding: 0;
}
.input-toggle:hover { color: var(--text-secondary); }

.form-error {
  font-size: .82rem;
  color: var(--danger);
  background: var(--danger-soft);
  border: 1px solid rgba(197,0,15,.15);
  border-radius: var(--radius-sm);
  padding: .5rem .75rem;
  margin-top: .5rem;
}

/* ─── Auth pages ─────────────────────────────────────────────────────────────── */
.auth-page {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 100vh;
  padding: 2rem 1rem;
  background: var(--yellow);
  /* Escape .main-content padding and max-width centering */
  margin: -1.75rem -1.25rem -4rem;
  width: calc(100% + 2.5rem);
}
html:has(.auth-page) { background: var(--yellow); }

.auth-card {
  width: 100%;
  max-width: 400px;
  background: var(--surface);
  border-radius: var(--radius-lg);
  padding: 2.25rem 2rem 1.75rem;
  box-shadow: var(--shadow-lg);
}

.auth-logo {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: .5rem;
  margin-bottom: 1.5rem;
}
.auth-logo img {
  width: 72px;
  height: 72px;
  border-radius: 16px;
}

.auth-title {
  text-align: center;
  font-size: 1.375rem;
  font-weight: 700;
  color: var(--text);
  margin-bottom: .3rem;
  letter-spacing: -.025em;
}
.auth-subtitle {
  text-align: center;
  color: var(--text-secondary);
  font-size: .9rem;
  margin-bottom: 1.75rem;
}
.auth-form { margin-bottom: 1.25rem; }

.auth-divider {
  display: flex;
  align-items: center;
  gap: .75rem;
  color: var(--text-muted);
  font-size: .8rem;
  margin: 1.25rem 0;
}
.auth-divider::before, .auth-divider::after {
  content: ''; flex: 1; height: 1px; background: var(--border);
}

.auth-footer { text-align: center; font-size: .875rem; color: var(--text-secondary); margin-top: 1.25rem; }
.auth-footer a { color: var(--text); font-weight: 600; }

/* ─── Badges ────────────────────────────────────────────────────────────────── */
.badge {
  display: inline-flex;
  align-items: center;
  padding: .2rem .55rem;
  border-radius: 99px;
  font-size: .74rem;
  font-weight: 600;
}
.badge-primary { background: var(--yellow-soft); color: var(--yellow-deeper); }
.badge-muted   { background: #F0EDE0; color: var(--text-secondary); }
.badge-green   { background: var(--success-soft); color: #1a9c40; }
.badge-red     { background: var(--danger-soft); color: var(--danger); }
.badge-yellow  { background: var(--yellow-soft); color: var(--yellow-deeper); }

/* ─── Status bar ────────────────────────────────────────────────────────────── */
.status-bar {
  display: flex;
  align-items: center;
  gap: .6rem;
  padding: .7rem 1rem;
  background: var(--success-soft);
  border: 1px solid rgba(45,213,91,.25);
  border-radius: var(--radius);
  font-size: .875rem;
}
.status-dot { width: 8px; height: 8px; border-radius: 50%; flex-shrink: 0; }
.status-dot--green { background: var(--success); box-shadow: 0 0 0 3px rgba(45,213,91,.2); }

/* ─── Courses ───────────────────────────────────────────────────────────────── */
.course-card { margin-bottom: .625rem; }
.course-name { font-size: .9375rem; font-weight: 600; margin-bottom: .3rem; color: var(--text); }
.course-meta { display: flex; align-items: center; gap: .5rem; flex-wrap: wrap; }
.course-room { font-size: .82rem; color: var(--text-secondary); }

/* ─── Skeleton ──────────────────────────────────────────────────────────────── */
.skeleton-card {
  height: 80px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  margin-bottom: .625rem;
  overflow: hidden;
  position: relative;
}
.skeleton-card::after {
  content: '';
  position: absolute; inset: 0;
  background: linear-gradient(90deg, transparent, rgba(255,196,9,.08), transparent);
  animation: shimmer 1.4s infinite;
}
@keyframes shimmer { from { transform: translateX(-100%); } to { transform: translateX(100%); } }

/* ─── Empty state ───────────────────────────────────────────────────────────── */
.empty-state {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: .75rem;
  padding: 3rem 1rem;
  color: var(--text-muted);
  text-align: center;
}
.empty-state p { font-size: .9rem; }

/* ─── Modal ─────────────────────────────────────────────────────────────────── */
.modal-overlay {
  position: fixed; inset: 0;
  background: rgba(29,60,71,.4);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 500;
  padding: 1rem;
  backdrop-filter: blur(3px);
}
.modal-overlay.hidden { display: none; }

.modal {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  width: 100%;
  max-width: 440px;
  box-shadow: var(--shadow-lg);
}
.modal-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1.25rem 1.25rem .8rem;
  border-bottom: 1px solid var(--border);
}
.modal-title { font-weight: 700; font-size: 1rem; color: var(--text); }
.modal-close {
  background: none; border: none; cursor: pointer;
  color: var(--text-muted); padding: 5px;
  border-radius: var(--radius-sm);
  display: flex; align-items: center;
}
.modal-close:hover { background: var(--yellow-softer); color: var(--text-secondary); }
.modal-body { padding: 1.25rem; }
.modal-footer {
  display: flex;
  justify-content: flex-end;
  gap: .5rem;
  padding: .75rem 1.25rem 1.25rem;
  border-top: 1px solid var(--border);
}
.modal-divider {
  display: flex;
  align-items: center;
  gap: .75rem;
  color: var(--text-muted);
  font-size: .8rem;
  margin: 1rem 0;
}
.modal-divider::before, .modal-divider::after {
  content: ''; flex: 1; height: 1px; background: var(--border);
}

/* ─── QR Scanner ────────────────────────────────────────────────────────────── */
.scanner-container {
  position: relative;
  border-radius: var(--radius-lg);
  overflow: hidden;
  background: #111;
  max-width: 400px;
  margin: 0 auto;
  aspect-ratio: 1;
  border: 1px solid var(--border);
  box-shadow: var(--shadow);
}

#qr-reader { width: 100% !important; border: none !important; }
#qr-reader video { width: 100% !important; height: 100% !important; object-fit: cover; }
#qr-reader img { display: none; }
#qr-reader__dashboard { display: none !important; }
#qr-reader__status_span { display: none; }
#qr-reader__header_message { display: none; }

.scanner-overlay { position: absolute; inset: 0; pointer-events: none; }
.scanner-frame {
  position: absolute;
  top: 50%; left: 50%;
  transform: translate(-50%, -50%);
  width: 200px; height: 200px;
  border: 2px solid rgba(255,255,255,.2);
  border-radius: var(--radius);
}
.scanner-frame::before, .scanner-frame::after {
  content: '';
  position: absolute;
  width: 22px; height: 22px;
  border-color: var(--yellow);
  border-style: solid;
}
.scanner-frame::before { top: -2px; left: -2px; border-width: 3px 0 0 3px; border-radius: var(--radius-sm) 0 0 0; }
.scanner-frame::after  { bottom: -2px; right: -2px; border-width: 0 3px 3px 0; border-radius: 0 0 var(--radius-sm) 0; }
.corner-tr, .corner-bl {
  position: absolute;
  width: 22px; height: 22px;
  border-color: var(--yellow);
  border-style: solid;
}
.corner-tr { top: -2px; right: -2px; border-width: 3px 3px 0 0; border-radius: 0 var(--radius-sm) 0 0; }
.corner-bl { bottom: -2px; left: -2px; border-width: 0 0 3px 3px; border-radius: 0 0 0 var(--radius-sm); }

.scan-line {
  position: absolute;
  left: 4px; right: 4px;
  height: 2px;
  background: linear-gradient(90deg, transparent, var(--yellow), transparent);
  animation: scan-move 2s ease-in-out infinite;
  border-radius: 2px;
}
@keyframes scan-move {
  0%   { top: 10%; opacity: 0; }
  10%  { opacity: 1; }
  90%  { opacity: 1; }
  100% { top: 90%; opacity: 0; }
}

.scan-controls {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: .5rem;
  max-width: 400px;
  margin: .75rem auto 0;
}
.manual-input-group { display: flex; gap: .4rem; flex: 1; min-width: 200px; }
.scan-step { }
.scan-step.hidden { display: none; }
.scan-actions { display: flex; justify-content: space-between; align-items: center; gap: .75rem; }

.qr-preview { display: flex; flex-direction: column; gap: .3rem; }
.qr-url-display {
  font-size: .75rem;
  color: var(--text-secondary);
  word-break: break-all;
  font-family: 'SF Mono', 'Fira Mono', monospace;
  background: var(--bg);
  padding: .35rem .5rem;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border);
}

/* ─── Friends check list ────────────────────────────────────────────────────── */
.friends-check-list { display: flex; flex-direction: column; gap: .5rem; }

.friend-check-item {
  display: flex;
  align-items: center;
  gap: .75rem;
  padding: .8rem 1rem;
  background: var(--surface);
  border: 1.5px solid var(--border);
  border-radius: var(--radius);
  cursor: pointer;
  transition: border-color var(--transition), background var(--transition), box-shadow var(--transition);
  user-select: none;
  box-shadow: var(--shadow-sm);
}
.friend-check-item:hover { border-color: #d4d0bf; background: var(--surface-hover); }
.friend-check-item.selected {
  border-color: var(--yellow);
  background: var(--yellow-softer);
  box-shadow: 0 0 0 3px rgba(255,196,9,.15);
}
.friend-check-item.disabled { opacity: .5; cursor: not-allowed; }

.friend-check-avatar {
  width: 36px; height: 36px;
  border-radius: 50%;
  background: var(--yellow-soft);
  color: var(--yellow-deeper);
  display: flex; align-items: center; justify-content: center;
  font-size: .8rem; font-weight: 700; flex-shrink: 0;
}
.friend-check-info { flex: 1; }
.friend-check-name { font-weight: 600; font-size: .9rem; color: var(--text); }
.friend-check-status { font-size: .8rem; color: var(--text-secondary); margin-top: .1rem; }

.friend-check-tick {
  width: 20px; height: 20px;
  border-radius: 50%;
  border: 2px solid var(--border);
  display: flex; align-items: center; justify-content: center;
  flex-shrink: 0;
  transition: all var(--transition);
  color: transparent;
}
.friend-check-item.selected .friend-check-tick {
  background: var(--yellow); border-color: var(--yellow); color: var(--text);
}

/* ─── Results ───────────────────────────────────────────────────────────────── */
.results-header { text-align: center; padding: 1.75rem 0 1.25rem; }
.results-header svg { display: block; margin: 0 auto .75rem; }
.results-header h2 { font-size: 1.25rem; font-weight: 700; color: var(--text); letter-spacing: -.02em; margin-bottom: .3rem; }
.results-header p { color: var(--text-secondary); font-size: .9rem; }

.results-list { display: flex; flex-direction: column; gap: .5rem; }
.result-item {
  display: flex;
  align-items: center;
  gap: .75rem;
  padding: .75rem 1rem;
  border-radius: var(--radius);
  border: 1px solid;
}
.result-item.success { background: var(--success-soft); border-color: rgba(45,213,91,.25); }
.result-item.error   { background: var(--danger-soft);  border-color: rgba(197,0,15,.15); }
.result-icon { flex-shrink: 0; }
.result-name { font-weight: 600; font-size: .9rem; color: var(--text); flex: 1; }
.result-msg  { font-size: .8rem; color: var(--text-secondary); }

/* ─── Friends page ──────────────────────────────────────────────────────────── */
.friend-card { margin-bottom: .5rem; }
.avatar {
  width: 42px; height: 42px;
  border-radius: 50%;
  background: var(--yellow-soft);
  display: flex; align-items: center; justify-content: center;
  flex-shrink: 0;
}
.avatar-initials { font-size: .875rem; font-weight: 700; color: var(--yellow-deeper); }
.friend-info { flex: 1; }
.friend-name { font-weight: 600; color: var(--text); }
.friend-status { font-size: .82rem; color: var(--text-secondary); margin-top: .15rem; }

.invite-link-row { display: flex; gap: .4rem; align-items: center; }
.invite-row {
  display: flex;
  align-items: center;
  gap: .5rem;
  padding: .65rem .85rem;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  margin-bottom: .4rem;
  flex-wrap: wrap;
  box-shadow: var(--shadow-sm);
}
.invite-link-text {
  font-family: 'SF Mono', 'Fira Mono', monospace;
  font-size: .78rem; color: var(--text-secondary);
  flex: 1; word-break: break-all; min-width: 100px;
}
.invite-meta { display: flex; align-items: center; gap: .4rem; }

/* ─── Toast ─────────────────────────────────────────────────────────────────── */
#toast-container {
  position: fixed; bottom: 1.5rem; right: 1rem;
  z-index: 1000;
  display: flex; flex-direction: column; gap: .5rem;
  pointer-events: none;
}
.toast {
  padding: .7rem 1rem;
  border-radius: var(--radius);
  font-size: .875rem;
  font-weight: 500;
  background: var(--surface);
  border: 1px solid var(--border);
  box-shadow: var(--shadow);
  pointer-events: auto;
  animation: slide-up .2s ease;
  max-width: 320px;
  color: var(--text);
}
.toast.success { border-color: rgba(45,213,91,.35); background: var(--success-soft); color: #1a9c40; }
.toast.error   { border-color: rgba(197,0,15,.2);   background: var(--danger-soft);  color: var(--danger); }
@keyframes slide-up { from { transform: translateY(8px); opacity: 0; } to { transform: translateY(0); opacity: 1; } }

/* ─── Spinner ───────────────────────────────────────────────────────────────── */
.loading-spinner {
  width: 26px; height: 26px;
  border: 2.5px solid var(--border);
  border-top-color: var(--yellow-dark);
  border-radius: 50%;
  animation: spin .7s linear infinite;
  display: block;
}

/* ─── Alert ─────────────────────────────────────────────────────────────────── */
.alert { padding: .7rem 1rem; border-radius: var(--radius-sm); font-size: .875rem; margin-bottom: 1rem; font-weight: 500; }
.alert-error   { background: var(--danger-soft); color: var(--danger); border: 1px solid rgba(197,0,15,.15); }
.alert-success { background: var(--success-soft); color: #1a9c40; border: 1px solid rgba(45,213,91,.25); }

/* ─── Utilities ─────────────────────────────────────────────────────────────── */
.hidden { display: none !important; }
.flex-between { display: flex; align-items: center; justify-content: space-between; }
.flex-gap { display: flex; align-items: center; gap: .75rem; }
.flex-1 { flex: 1; }
.ml-auto { margin-left: auto; }
.mb-2 { margin-bottom: .5rem; }
.mb-3 { margin-bottom: .75rem; }
.mb-4 { margin-bottom: 1rem; }
.mt-2 { margin-top: .5rem; }
.mt-3 { margin-top: .75rem; }
.mt-4 { margin-top: 1rem; }
.mt-6 { margin-top: 1.5rem; }
.mx-auto { margin-left: auto; margin-right: auto; }
.text-sm { font-size: .875rem; }
.text-xs { font-size: .75rem; }
.text-muted { color: var(--text-secondary); }
.text-green { color: #1a9c40; }
.text-red { color: var(--danger); }
.font-semibold { font-weight: 600; }

/* ─── Admin panel ────────────────────────────────────────────────────────────── */
.stats-row {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1rem;
}
.stat-card {
  background: var(--surface);
  border: 1.5px solid var(--border);
  border-radius: var(--radius);
  padding: 1.25rem;
  text-align: center;
  box-shadow: var(--shadow-sm);
}
.stat-value { font-size: 2rem; font-weight: 700; color: var(--text); }
.stat-label {
  font-size: .78rem;
  font-weight: 600;
  color: var(--text-secondary);
  text-transform: uppercase;
  letter-spacing: .06em;
  margin-top: .25rem;
}

.data-table { width: 100%; border-collapse: collapse; }
.data-table th {
  font-size: .75rem;
  font-weight: 600;
  color: var(--text-secondary);
  text-transform: uppercase;
  letter-spacing: .06em;
  padding: .75rem 1.25rem;
  border-bottom: 1.5px solid var(--border);
  text-align: left;
}
.data-table td {
  padding: .75rem 1.25rem;
  border-bottom: 1px solid var(--border);
  vertical-align: middle;
}
.data-table tr:last-child td { border-bottom: none; }
.data-table tbody tr:hover { background: var(--surface-hover); }

.code-mono {
  font-family: 'Courier New', Courier, monospace;
  font-size: .8rem;
  background: var(--yellow-softer);
  padding: .2rem .4rem;
  border-radius: var(--radius-sm);
  user-select: all;
}

.badge-success {
  display: inline-flex;
  align-items: center;
  font-size: .72rem;
  font-weight: 600;
  padding: .2rem .6rem;
  border-radius: 999px;
  background: var(--success-soft);
  color: #1a9c40;
}
.badge-neutral {
  display: inline-flex;
  align-items: center;
  font-size: .72rem;
  font-weight: 600;
  padding: .2rem .6rem;
  border-radius: 999px;
  background: rgba(29,60,71,.07);
  color: var(--text-secondary);
}

.btn-danger {
  background: var(--danger-soft);
  color: var(--danger);
  border: 1.5px solid rgba(197,0,15,.2);
}
.btn-danger:hover:not(:disabled) { background: rgba(197,0,15,.15); }

.p-0 { padding: 0 !important; }

/* ─── Device Code Flow ───────────────────────────────────────────────────────── */
.device-code-box {
  display: flex;
  align-items: center;
  justify-content: space-between;
  background: var(--yellow-soft);
  border: 1.5px solid var(--yellow-dark);
  border-radius: var(--radius);
  padding: .75rem 1rem;
}
.device-code-value {
  font-size: 1.35rem;
  font-weight: 700;
  letter-spacing: .15em;
  color: var(--text);
}
.ms-waiting {
  display: flex;
  align-items: center;
  gap: .6rem;
  color: var(--text-secondary);
  font-size: .875rem;
}

/* ─── Responsive ────────────────────────────────────────────────────────────── */
@media (max-width: 600px) {
  .navbar { padding: 0 1rem; }
  .nav-link span { display: none; }
  .page-header { flex-direction: column; align-items: flex-start; }
  .scan-controls { flex-direction: column; }
  .manual-input-group { width: 100%; }
  .auth-card { padding: 1.5rem; }
}