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

:root {
  --bg: #1a1a2e;
  --bg2: #16213e;
  --bg3: #0f3460;
  --surface: #1e2a4a;
  --surface2: #253354;
  --border: #2a3f6e;
  --text: #e0e0e0;
  --text2: #a0a8c0;
  --accent: #4fc3f7;
  --accent2: #29b6f6;
  --green: #66bb6a;
  --red: #ef5350;
  --orange: #ffa726;
  --yellow: #ffee58;
  --purple: #ab47bc;
  --radius: 8px;
  --shadow: 0 2px 8px rgba(0,0,0,0.3);
}

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.5;
  min-height: 100vh;
}

/* Login */
.login-wrap {
  display: flex;
  justify-content: center;
  align-items: center;
  min-height: 100vh;
}
.login-box {
  background: var(--surface);
  padding: 2rem;
  border-radius: var(--radius);
  width: 340px;
  box-shadow: var(--shadow);
}
.login-box h2 { text-align: center; margin-bottom: 1.5rem; color: var(--accent); }
.login-box input {
  width: 100%;
  padding: 0.6rem 0.8rem;
  margin-bottom: 0.8rem;
  background: var(--bg2);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  color: var(--text);
  font-size: 0.95rem;
}
.login-box button { width: 100%; }
.login-error { color: var(--red); font-size: 0.85rem; margin-bottom: 0.5rem; text-align: center; }

/* Top bar */
.topbar {
  background: var(--bg2);
  padding: 0.6rem 1rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  border-bottom: 1px solid var(--border);
  position: sticky;
  top: 0;
  z-index: 100;
}
.topbar h1 { font-size: 1.1rem; color: var(--accent); }
.topbar-right { display: flex; align-items: center; gap: 0.6rem; }
.topbar-user { color: var(--text2); font-size: 0.85rem; }

/* Buttons */
button, .btn {
  padding: 0.45rem 0.9rem;
  border: none;
  border-radius: var(--radius);
  cursor: pointer;
  font-size: 0.85rem;
  font-weight: 500;
  transition: opacity 0.15s;
  background: var(--accent);
  color: #000;
}
button:hover { opacity: 0.85; }
.btn-sm { padding: 0.25rem 0.55rem; font-size: 0.78rem; }
.btn-outline { background: transparent; border: 1px solid var(--border); color: var(--text); }
.btn-outline:hover { background: var(--surface2); }
.btn-danger { background: var(--red); color: #fff; }
.btn-green { background: var(--green); color: #000; }
.btn-orange { background: var(--orange); color: #000; }
.btn-purple { background: var(--purple); color: #fff; }

/* Tabs */
.tabs {
  display: flex;
  gap: 0;
  background: var(--bg2);
  border-bottom: 1px solid var(--border);
  overflow-x: auto;
}
.tab {
  padding: 0.55rem 1rem;
  cursor: pointer;
  font-size: 0.85rem;
  color: var(--text2);
  border-bottom: 2px solid transparent;
  white-space: nowrap;
  transition: color 0.15s, border-color 0.15s;
}
.tab:hover { color: var(--text); }
.tab.active { color: var(--accent); border-bottom-color: var(--accent); }

/* Mode toggle */
.mode-tabs {
  display: flex;
  gap: 0;
  background: var(--surface);
  border-radius: var(--radius);
  overflow: hidden;
  margin: 0.8rem 1rem 0;
}
.mode-tab {
  flex: 1;
  padding: 0.5rem;
  text-align: center;
  cursor: pointer;
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--text2);
  transition: all 0.15s;
}
.mode-tab.active { background: var(--accent); color: #000; }

/* Summary bar */
.summary-bar {
  display: flex;
  gap: 1rem;
  padding: 0.6rem 1rem;
  background: var(--surface);
  margin: 0.5rem 1rem;
  border-radius: var(--radius);
  font-size: 0.85rem;
  flex-wrap: wrap;
}
.summary-item { display: flex; gap: 0.3rem; align-items: center; }
.summary-value { font-weight: 700; color: var(--accent); }

/* Content */
.content { padding: 0 1rem 1rem; }

/* Group */
.group-section { margin-top: 0.8rem; }
.group-header {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.4rem 0.6rem;
  background: var(--surface);
  border-radius: var(--radius);
  cursor: pointer;
  font-weight: 600;
  font-size: 0.9rem;
  user-select: none;
}
.group-header:hover { background: var(--surface2); }
.group-arrow { transition: transform 0.15s; font-size: 0.7rem; }
.group-header.collapsed .group-arrow { transform: rotate(-90deg); }
.group-count { color: var(--text2); font-size: 0.8rem; font-weight: 400; }
.group-body { padding: 0.3rem 0; }
.group-body.hidden { display: none; }

/* Person row */
.person-row {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.45rem 0.6rem;
  border-bottom: 1px solid var(--border);
  font-size: 0.88rem;
  flex-wrap: wrap;
}
.person-row:last-child { border-bottom: none; }
.priority-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  flex-shrink: 0;
}
.priority-dot.high { background: var(--red); }
.priority-dot.mid { background: var(--orange); }
.priority-dot.low { background: var(--green); }
.person-name { font-weight: 600; min-width: 100px; }
.person-contact { color: var(--text2); font-size: 0.82rem; }
.chip {
  display: inline-block;
  padding: 0.15rem 0.45rem;
  border-radius: 12px;
  font-size: 0.75rem;
  font-weight: 600;
}
.chip-role { background: var(--purple); color: #fff; }
.chip-amount { background: var(--bg3); color: var(--yellow); }
.person-actions { margin-left: auto; display: flex; gap: 0.3rem; flex-shrink: 0; }

/* Toolbar */
.toolbar {
  display: flex;
  gap: 0.5rem;
  padding: 0.6rem 0;
  align-items: center;
  flex-wrap: wrap;
}
.toolbar input[type="text"] {
  padding: 0.4rem 0.7rem;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  color: var(--text);
  font-size: 0.85rem;
  flex: 1;
  min-width: 150px;
}

/* Modal */
.modal-overlay {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.6);
  z-index: 200;
  justify-content: center;
  align-items: flex-start;
  padding-top: 5vh;
  overflow-y: auto;
}
.modal-overlay.open { display: flex; }
.modal {
  background: var(--surface);
  border-radius: var(--radius);
  padding: 1.5rem;
  width: 420px;
  max-width: 95vw;
  box-shadow: var(--shadow);
  margin-bottom: 2rem;
}
.modal h3 { margin-bottom: 1rem; color: var(--accent); }
.modal label {
  display: block;
  font-size: 0.82rem;
  color: var(--text2);
  margin-bottom: 0.2rem;
  margin-top: 0.6rem;
}
.modal input, .modal select, .modal textarea {
  width: 100%;
  padding: 0.45rem 0.7rem;
  background: var(--bg2);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  color: var(--text);
  font-size: 0.9rem;
}
.modal textarea { resize: vertical; min-height: 60px; }
.modal-actions { display: flex; gap: 0.5rem; margin-top: 1rem; justify-content: flex-end; }

/* Admin */
.admin-section {
  background: var(--surface);
  border-radius: var(--radius);
  padding: 1rem;
  margin-bottom: 1rem;
}
.admin-section h3 { margin-bottom: 0.8rem; color: var(--accent); }
.admin-table { width: 100%; border-collapse: collapse; font-size: 0.85rem; }
.admin-table th, .admin-table td {
  padding: 0.4rem 0.6rem;
  text-align: left;
  border-bottom: 1px solid var(--border);
}
.admin-table th { color: var(--text2); font-weight: 600; }
.diff-field { font-weight: 600; color: var(--accent); }
.diff-from { color: var(--red); text-decoration: line-through; }
.diff-to { color: var(--green); }

/* Tags */
.tag-filter-bar {
  display: flex;
  gap: 0.4rem;
  padding: 0.4rem 0;
  flex-wrap: wrap;
  align-items: center;
}
.tag-filter-label { font-size: 0.8rem; color: var(--text2); margin-right: 0.2rem; }
.tag-chip {
  display: inline-flex;
  align-items: center;
  padding: 0.15rem 0.5rem;
  border-radius: 12px;
  font-size: 0.73rem;
  font-weight: 600;
  cursor: pointer;
  border: 2px solid transparent;
  transition: border-color 0.15s, opacity 0.15s;
  color: #fff;
}
.tag-chip:hover { opacity: 0.85; }
.tag-chip.active { border-color: #fff; }
.tag-chip-sm {
  display: inline-block;
  padding: 0.1rem 0.35rem;
  border-radius: 10px;
  font-size: 0.7rem;
  font-weight: 600;
  color: #fff;
}
/* Modal tag picker */
.tag-picker { display: flex; flex-wrap: wrap; gap: 0.3rem; margin-top: 0.3rem; }
.tag-picker .tag-chip { font-size: 0.78rem; }
.tag-picker .tag-chip.selected { border-color: #fff; box-shadow: 0 0 0 1px rgba(255,255,255,0.3); }
.new-tag-inline {
  display: flex;
  gap: 0.3rem;
  align-items: center;
  margin-top: 0.4rem;
}
.new-tag-inline input[type="text"] {
  padding: 0.3rem 0.5rem;
  background: var(--bg2);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  color: var(--text);
  font-size: 0.82rem;
  width: 120px;
}
.new-tag-inline input[type="color"] {
  width: 30px;
  height: 28px;
  border: none;
  border-radius: 4px;
  cursor: pointer;
  background: none;
  padding: 0;
}

/* Responsive */
@media (max-width: 600px) {
  .person-row { font-size: 0.82rem; padding: 0.4rem; }
  .person-actions { margin-left: 0; width: 100%; justify-content: flex-end; margin-top: 0.3rem; }
  .modal { padding: 1rem; }
  .summary-bar { gap: 0.5rem; font-size: 0.8rem; }
}