/* ================================================================
   Card
   ================================================================ */
.card {
  background: var(--bg2);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.75rem 2rem;
  box-shadow: var(--shadow);
  margin-bottom: 2rem;
}

.card h2 {
  font-size: 1.1rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: .08em;
  color: var(--text-muted);
  margin-bottom: 1.25rem;
}

/* ================================================================
   Input row
   ================================================================ */
.row-input {
  display: flex;
  gap: .75rem;
  flex-wrap: wrap;
}

input[type="text"], select {
  background: var(--bg3);
  border: 1px solid var(--border);
  border-radius: 7px;
  color: var(--text);
  font-size: .95rem;
  padding: .55rem .9rem;
  outline: none;
  transition: border-color .2s;
}

input[type="text"]:focus, select:focus {
  border-color: var(--accent);
}

.row-input input[type="text"] {
  flex: 1;
  min-width: 180px;
}

/* ================================================================
   Buttons
   ================================================================ */
.btn {
  border: none;
  border-radius: 7px;
  cursor: pointer;
  font-size: .95rem;
  font-weight: 600;
  padding: .55rem 1.2rem;
  transition: opacity .15s, transform .1s;
  white-space: nowrap;
}
.btn:active { transform: scale(.97); }
.btn:disabled { opacity: .4; cursor: not-allowed; }

.btn-primary {
  background: var(--accent);
  color: #fff;
}
.btn-primary:hover:not(:disabled) { opacity: .88; }

.btn-secondary {
  background: var(--card-bg);
  color: var(--accent);
  border: 1.5px solid var(--accent);
}
.btn-secondary:hover:not(:disabled) { background: var(--accent); color: #fff; }

.btn-accent {
  background: linear-gradient(135deg, var(--accent), var(--accent2));
  color: #fff;
  padding: .65rem 2rem;
  font-size: 1rem;
}
.btn-accent:hover:not(:disabled) { opacity: .88; }

.btn-icon {
  background: transparent;
  border: 1px solid var(--border);
  color: var(--text-muted);
  padding: .3rem .65rem;
  font-size: .82rem;
  border-radius: 6px;
}
.btn-icon:hover { border-color: var(--accent); color: var(--accent); }

/* ================================================================
   Status message
   ================================================================ */
.status-msg {
  margin-top: .75rem;
  padding: .55rem .9rem;
  border-radius: 7px;
  font-size: .9rem;
  display: flex;
  align-items: center;
  gap: .5rem;
}
.status-msg.info    { background: rgba(91,141,238,.15); color: var(--accent2); border: 1px solid rgba(91,141,238,.3); }
.status-msg.success { background: rgba(74,222,128,.12); color: var(--success); border: 1px solid rgba(74,222,128,.3); }
.status-msg.error   { background: rgba(248,113,113,.12); color: var(--error);  border: 1px solid rgba(248,113,113,.3); }

/* ================================================================
   User list
   ================================================================ */
.user-list {
  display: flex;
  flex-wrap: wrap;
  gap: .65rem;
  margin-top: 1.1rem;
  min-height: 2.5rem;
}

.user-chip {
  display: flex;
  align-items: center;
  gap: .5rem;
  background: var(--bg3);
  border: 1.5px solid var(--border);
  border-radius: 50px;
  padding: .3rem .75rem .3rem .55rem;
  cursor: pointer;
  transition: border-color .15s, background .15s;
  user-select: none;
}
.user-chip:hover { border-color: var(--accent); }
.user-chip.selected {
  border-color: var(--accent);
  background: rgba(124,106,247,.18);
}

.user-chip input[type="checkbox"] {
  accent-color: var(--accent);
  width: 1rem;
  height: 1rem;
  cursor: pointer;
}

.user-chip .chip-name {
  font-size: .9rem;
  font-weight: 500;
}

.user-chip .btn-icon {
  margin-left: .2rem;
  padding: .2rem .5rem;
  font-size: .75rem;
}

.row-actions {
  margin-top: 1.4rem;
  display: flex;
  justify-content: flex-end;
}

/* ================================================================
   Loading
   ================================================================ */
.loading {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 1rem;
  padding: 3rem 0;
  color: var(--text-muted);
}

.spinner {
  width: 44px;
  height: 44px;
  border: 4px solid var(--border);
  border-top-color: var(--accent);
  border-radius: 50%;
  animation: spin .8s linear infinite;
}
@keyframes spin { to { transform: rotate(360deg); } }

/* ================================================================
   Tabs
   ================================================================ */
.tabs {
  display: flex;
  gap: .4rem;
  border-bottom: 2px solid var(--border);
  margin-bottom: 1.5rem;
  flex-wrap: wrap;
}

.tab {
  background: transparent;
  border: none;
  border-bottom: 2px solid transparent;
  margin-bottom: -2px;
  color: var(--text-muted);
  cursor: pointer;
  font-size: .95rem;
  font-weight: 600;
  padding: .65rem 1.3rem;
  transition: color .15s, border-color .15s;
}
.tab:hover { color: var(--text); }
.tab.active {
  color: var(--accent);
  border-bottom-color: var(--accent);
}

.tab-panel { display: none; pointer-events: none; }
.tab-panel.active { display: block; pointer-events: auto; }

/* ================================================================
   Chart images
   ================================================================ */
.chart-img {
  max-width: 100%;
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  display: block;
  margin: 0 auto;
}

/* ================================================================
   Utility
   ================================================================ */
.hidden { display: none !important; }

/* ================================================================
   Mobile – components
   ================================================================ */
@media (max-width: 640px) {
  .card {
    padding: 1.1rem 1rem;
  }

  /* Username input expands to fill its flex row */
  .row-input input[type="text"] {
    min-width: 140px;
    flex: 1;
  }

  /* Full-width compare button */
  .row-actions {
    justify-content: stretch;
  }
  .btn-accent {
    width: 100%;
    text-align: center;
  }

  /* Scrollable tab bar instead of wrapping */
  .tabs {
    overflow-x: auto;
    flex-wrap: nowrap;
    -webkit-overflow-scrolling: touch;
    padding-bottom: .3rem;
    /* hide scrollbar visually but keep functionality */
    scrollbar-width: none;
  }
  .tabs::-webkit-scrollbar {
    display: none;
  }
  .tab {
    padding: .5rem .85rem;
    font-size: .85rem;
    white-space: nowrap;
    flex-shrink: 0;
  }
}