:root {
  --bg: #0f1117;
  --surface: #1a1d27;
  --surface2: #232734;
  --surface3: #2a2e3d;
  --border: #2e3346;
  --text: #e8edf5;
  --text2: #949bb5;
  --text3: #5c6380;
  --accent: #f97316;
  --accent2: #fb923c;
  --accent-glow: rgba(249, 115, 22, 0.15);
  --radius: 10px;
  --radius-sm: 6px;
  --shadow: 0 4px 24px rgba(0,0,0,0.3);
}

[data-board-theme="thoi"]   { --accent: #f97316; --accent2: #fb923c; --accent-glow: rgba(249,115,22,0.15); }
[data-board-theme="nhat"]   { --accent: #3b82f6; --accent2: #60a5fa; --accent-glow: rgba(59,130,246,0.15); }
[data-board-theme="nguyet"] { --accent: #8b5cf6; --accent2: #a78bfa; --accent-glow: rgba(139,92,246,0.15); }
[data-board-theme="nien"]  { --accent: #f59e0b; --accent2: #fbbf24; --accent-glow: rgba(245,158,11,0.15); }

* { margin:0; padding:0; box-sizing:border-box; }
html { font-size:15px; }
body {
  background: var(--bg);
  color: var(--text);
  font-family: 'Inter', system-ui, -apple-system, sans-serif;
  min-height: 100vh;
  transition: background 0.3s;
}

/* HEADER */
.header {
  display: flex; align-items: center; justify-content: space-between;
  padding: 10px 20px;
  background: var(--surface);
  border-bottom: 1px solid var(--border);
  position: sticky; top: 0; z-index: 100;
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
}
.header-brand {
  display: flex; align-items: center; gap: 12px;
}
.header-logo {
  width: 32px; height: 32px;
  background: linear-gradient(135deg, var(--accent), var(--accent2));
  border-radius: 8px;
  display: flex; align-items: center; justify-content: center;
  font-weight: 800; font-size: .85rem; color: #fff;
  transition: background 0.3s;
}
.header-title {
  font-size: 1rem; font-weight: 700; letter-spacing: 1px;
}
.header-title span { color: var(--accent); transition: color 0.3s; }
.header-sub {
  font-size: .7rem; color: var(--text3); font-weight: 500;
  letter-spacing: .5px;
}
.header-right {
  display: flex; align-items: center; gap: 8px;
}
.header-time {
  font-size: .72rem; color: var(--text2);
  background: var(--surface2); padding: 4px 10px;
  border-radius: 20px; border: 1px solid var(--border);
}

/* NAVIGATION */
.nav {
  display: flex; align-items: center; justify-content: center;
  gap: 8px; padding: 10px 16px;
  background: var(--surface);
  border-bottom: 1px solid var(--border);
  flex-wrap: wrap;
}
.nav-btn {
  background: var(--surface2); color: var(--text2);
  border: 1px solid var(--border); border-radius: var(--radius-sm);
  padding: 6px 14px; font-size: .78rem; font-weight: 600;
  cursor: pointer; transition: all 0.2s;
  display: inline-flex; align-items: center; gap: 4px;
}
.nav-btn:hover:not(:disabled) {
  background: var(--surface3); color: var(--text); border-color: var(--accent);
}
.nav-btn:disabled { opacity: .35; cursor: not-allowed; }
.nav-btn.primary {
  background: var(--accent); color: #fff; border-color: var(--accent);
}
.nav-btn.primary:hover { filter: brightness(1.1); }
.nav-label {
  font-size: .85rem; font-weight: 700; color: var(--text);
  min-width: 130px; text-align: center;
  background: var(--surface2); padding: 4px 14px;
  border-radius: 20px; border: 1px solid var(--border);
}
.nav-board-label {
  font-size: .65rem; font-weight: 600; text-transform: uppercase;
  letter-spacing: 1.5px; color: var(--accent); transition: color 0.3s;
}
.picker {
  padding: 5px 10px; border: 1px solid var(--border);
  border-radius: var(--radius-sm); font-size: .78rem;
  font-family: inherit; background: var(--surface2); color: var(--text);
  outline: none; cursor: pointer; transition: border 0.2s;
}
.picker:focus { border-color: var(--accent); }
.nav-sep { color: var(--border); font-weight: 300; margin: 0 2px; }

/* MODE TOGGLE */
.mode-toggle {
  display: inline-flex; align-items: center;
  background: var(--surface2); border-radius: var(--radius-sm);
  border: 1px solid var(--border); overflow: hidden;
}
.mode-toggle .mode-opt {
  padding: 4px 10px; font-size: .7rem; font-weight: 600;
  color: var(--text3); cursor: pointer; transition: all 0.2s;
  user-select: none;
}
.mode-toggle .mode-opt.active {
  background: var(--accent); color: #fff;
}

/* FOUR PILLARS */
.pillars {
  display: flex; justify-content: center; align-items: center;
  gap: 16px; padding: 14px 16px;
  background: var(--surface);
  border-bottom: 1px solid var(--border);
}
.pillar {
  display: flex; flex-direction: column; align-items: center;
  gap: 2px;
}
.pillar .can { color: #f87171; font-size: 1.3rem; font-weight: 700; font-family: 'Noto Serif SC', serif; }
.pillar .chi { color: #60a5fa; font-size: 1.3rem; font-weight: 700; font-family: 'Noto Serif SC', serif; }
.pillar .lbl { font-size: .6rem; color: var(--text3); font-weight: 600; text-transform: uppercase; letter-spacing: 1px; }
.pillar-sep { color: var(--border); font-size: 1.2rem; font-weight: 300; }

/* BOARD TABS */
.board-tabs {
  display: flex; justify-content: center; gap: 6px;
  padding: 12px 16px;
  background: var(--surface);
  border-bottom: 1px solid var(--border);
}
.board-tab {
  padding: 8px 18px; font-size: .8rem; font-weight: 600;
  border-radius: var(--radius-sm);
  cursor: pointer; transition: all 0.25s;
  border: 1px solid var(--border);
  background: var(--surface2);
  color: var(--text2);
  display: flex; align-items: center; gap: 6px;
  position: relative;
}
.board-tab:hover {
  background: var(--surface3); color: var(--text);
  transform: translateY(-1px);
}
.board-tab.active {
  background: var(--accent); color: #fff; border-color: var(--accent);
  box-shadow: 0 4px 16px var(--accent-glow);
  transform: translateY(-1px);
}
.board-tab .dot {
  width: 6px; height: 6px; border-radius: 50%;
  background: currentColor; opacity: .5;
}
.board-tab .badge {
  font-size: .55rem; background: rgba(255,255,255,0.15);
  padding: 1px 5px; border-radius: 10px; font-weight: 700;
}

/* BOARD OPTIONS */
.board-options {
  display: none;
  padding: 12px 20px;
  background: var(--surface);
  border-bottom: 1px solid var(--border);
}
.board-options.active { display: flex; }
.board-options-inner {
  display: flex; flex-wrap: wrap; gap: 8px 16px;
  align-items: center; justify-content: center;
  width: 100%; max-width: 900px; margin: 0 auto;
}
.board-options .opt-group {
  display: flex; align-items: center; gap: 6px;
}
.board-options .opt-label {
  font-size: .68rem; font-weight: 600; color: var(--text3);
  text-transform: uppercase; letter-spacing: .5px;
}
.board-options .opt-val {
  font-size: .75rem; font-weight: 700; color: var(--accent);
  background: var(--accent-glow); padding: 2px 8px;
  border-radius: 4px;
}
.board-options .opt-btn {
  font-size: .72rem; padding: 3px 10px;
  background: var(--surface2); border: 1px solid var(--border);
  border-radius: 4px; color: var(--text2); cursor: pointer;
  font-weight: 500; font-family: inherit; transition: all 0.2s;
}
.board-options .opt-btn:hover { border-color: var(--accent); color: var(--text); }
.board-options .opt-btn.active { background: var(--accent); color: #fff; border-color: var(--accent); }

/* CHART */
.chart-wrap {
  display: flex; justify-content: center;
  padding: 16px;
}
.chart {
  border-collapse: collapse;
  border: 1px solid var(--border);
  background: var(--surface2);
  box-shadow: var(--shadow);
  border-radius: 4px;
  overflow: hidden;
}
.chart td.cell {
  width: 175px; height: 175px;
  border: 1px solid var(--border);
  padding: 0; vertical-align: top; position: relative;
}
.cell-inner { height: 100%; display: flex; flex-direction: column; }
.chart td.edge, .chart th.edge {
  width: 34px; border: none; vertical-align: middle; text-align: center;
  background: var(--surface3); color: var(--text2);
  font-size: .75rem; font-weight: 700; padding: 4px 2px;
  border: 1px solid var(--border);
  font-family: 'Noto Serif SC', serif;
}
.chart th.edge-top, .chart th.edge-bot,
.chart td.edge-top, .chart td.edge-bot {
  height: 28px; border: none;
  background: var(--surface3); color: var(--text2);
  font-size: .7rem; font-weight: 700; vertical-align: middle;
  border: 1px solid var(--border);
  font-family: 'Noto Serif SC', serif;
}
.cell-row { display: flex; justify-content: space-around; align-items: center; padding: 2px 6px; }
.cell-row.top { border-bottom: 1px solid var(--border); min-height: 44px; padding-top: 4px; }
.cell-row.mid { flex: 1; border-bottom: 1px solid var(--border); min-height: 52px; }
.cell-row.bot { min-height: 38px; padding-bottom: 2px; justify-content: space-between; }

.el { display: flex; flex-direction: column; align-items: center; justify-content: center; min-width: 44px; }
.el .hz {
  font-size: 1.2rem; font-weight: 700;
  font-family: 'Noto Serif SC', 'Noto Sans Vietnamese', serif;
  line-height: 1.2;
}
.el .lbl { font-size: .45rem; color: var(--text3); font-weight: 600; letter-spacing: .3px; margin-top: 1px; max-width: 52px; text-align: center; }
.el-tb .hz { color: #34d399; font-size: 1.2rem; }
.el-tb .lbl { color: #34d399; }
.el-db .hz { color: var(--text2); font-size: 1rem; }
.el-db .lbl { color: var(--text2); }
.el-tinh .hz { color: #60a5fa; font-size: .72rem; margin-bottom: 1px; }
.el-tinh .lbl { color: #60a5fa; }
.el-mon .hz { color: var(--text); font-size: .72rem; margin-bottom: 1px; }
.el-mon .lbl { color: #d4a574; font-weight: 700; }
.el-than .hz { color: #d4a574; font-size: .72rem; margin-bottom: 1px; }
.el-than .lbl { color: var(--text2); }
.el-num { font-size: 1.3rem; color: var(--text3); font-weight: 700; }

.ck-list { text-align: center; padding: 2px 4px; border-top: 1px dashed var(--border); line-height: 1.4; font-size: .55rem; }
.ck-tag { font-weight: 600; display: inline; }
.ck-cat { color: #34d399; }
.ck-hung { color: #f87171; }
.ck-none { color: var(--text3); }

.flag { font-size: .5rem; padding: 1px 4px; border-radius: 3px; font-weight: 700; letter-spacing: .5px; }
.flag-phu { background: #f43f5e; color: #fff; }
.flag-su { background: #3b82f6; color: #fff; }
.flags-wrap { display: flex; gap: 2px; align-items: center; min-width: 44px; justify-content: center; }

.center-cell {
  background: var(--surface2);
  border: 2px solid var(--accent) !important;
  position: relative;
}
.que-dich { display: flex; flex-direction: column; gap: 2px; width: 26px; margin: 4px auto; }
.hao { height: 2.5px; display: flex; justify-content: space-between; position: relative; }
.hao-duong { background: var(--text); width: 100%; border-radius: 1px; }
.hao-am .am-part { background: var(--text); width: 44%; height: 100%; border-radius: 1px; }
.hao-dong-dot { position: absolute; right: -7px; top: 50%; transform: translateY(-50%); width: 3px; height: 3px; background: #f87171; border-radius: 50%; }

/* INFO BARS */
.info-bar {
  display: flex; flex-wrap: wrap; gap: 6px 14px;
  justify-content: center; align-items: center;
  padding: 10px 16px;
  background: var(--surface);
  border-bottom: 1px solid var(--border);
  font-size: .72rem;
}
.info-tag { display: inline-flex; align-items: center; gap: 3px; }
.info-tag .lbl { color: var(--text3); font-weight: 500; }
.info-tag .val { color: var(--text); font-weight: 700; }

/* CONTENT AREA */
.content-area {
  max-width: 1200px;
  margin: 0 auto;
  padding: 16px;
}
.section-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 20px;
  margin-bottom: 16px;
  box-shadow: var(--shadow);
}
.section-card .section-title {
  font-size: .85rem; font-weight: 700; color: var(--text);
  margin-bottom: 14px;
  display: flex; align-items: center; gap: 8px;
}
.section-card .section-title .accent-bar {
  width: 3px; height: 16px;
  background: var(--accent); border-radius: 2px;
  transition: background 0.3s;
}
.section-card .section-sub {
  font-size: .72rem; color: var(--text3); font-weight: 500;
  margin-top: -8px; margin-bottom: 14px;
}

/* Dụng Thần */
.dt-grid {
  display: flex; flex-wrap: wrap; gap: 6px;
  margin-bottom: 14px;
}
.dt-chip {
  padding: 5px 12px; font-size: .72rem; font-weight: 600;
  border-radius: 20px; cursor: pointer; transition: all 0.2s;
  border: 1px solid var(--border);
  background: var(--surface2); color: var(--text2);
  font-family: inherit;
}
.dt-chip:hover { border-color: var(--accent); color: var(--text); }
.dt-chip.active {
  background: var(--accent); color: #fff; border-color: var(--accent);
  box-shadow: 0 2px 8px var(--accent-glow);
}

/* Interpretation cards */
.km-card-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 10px;
}
@media (max-width: 700px) {
  .km-card-grid { grid-template-columns: 1fr; }
}
.km-card {
  background: var(--surface2);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 12px;
  transition: border 0.2s;
}
.km-card:hover { border-color: var(--text3); }
.km-card .card-title {
  font-size: .72rem; font-weight: 700;
  color: var(--accent); margin-bottom: 6px;
  display: flex; justify-content: space-between;
  transition: color 0.3s;
}
.km-card .card-title .score-badge {
  font-size: .6rem; background: var(--accent-glow);
  color: var(--accent); padding: 1px 6px; border-radius: 10px;
}
.km-card .card-content {
  font-size: .7rem;
  color: var(--text2);
  line-height: 1.6;
}

.km-text-box {
  background: var(--surface2);
  border: 1px solid var(--border);
  border-left: 3px solid var(--accent);
  border-radius: var(--radius-sm);
  padding: 12px;
  font-size: .72rem;
  color: var(--text2);
  line-height: 1.6;
  margin-bottom: 12px;
  transition: border-left-color 0.3s;
}
.km-section-title {
  font-size: .78rem; font-weight: 700;
  color: var(--text); margin-top: 16px; margin-bottom: 10px;
  display: flex; align-items: center; gap: 8px;
}
.km-section-title .num {
  width: 20px; height: 20px; border-radius: 50%;
  background: var(--accent); color: #fff;
  display: flex; align-items: center; justify-content: center;
  font-size: .6rem; font-weight: 700;
  transition: background 0.3s;
}

.km-cung-details { display: flex; flex-direction: column; gap: 8px; }
.km-cung-card {
  background: var(--surface2);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  overflow: hidden;
}
.cung-card-header {
  font-size: .72rem; font-weight: 700;
  color: var(--text); padding: 6px 12px;
  border-bottom: 1px solid var(--border);
  display: flex; justify-content: space-between;
}
.cung-card-body { padding: 12px; font-size: .7rem; color: var(--text2); line-height: 1.6; }

/* USER FORM */
.user-form {
  background: var(--surface);
  border: 1px solid var(--accent);
  border-radius: var(--radius);
  padding: 14px 18px;
  margin-bottom: 16px;
}
.user-form-inner {
  display: flex; flex-wrap: wrap; gap: 8px 14px;
  align-items: center; justify-content: center;
  font-size: .75rem;
}
.user-form-inner label {
  display: inline-flex; align-items: center; gap: 4px;
  color: var(--text2); font-weight: 500;
}
.user-form-inner input, .user-form-inner select {
  padding: 4px 8px; border: 1px solid var(--border);
  border-radius: 4px; font-size: .75rem;
  background: var(--surface2); color: var(--text);
  font-family: inherit; outline: none;
}
.user-form-inner input:focus, .user-form-inner select:focus {
  border-color: var(--accent);
}

/* PANEL VISIBILITY */
.board-panel { display: none; }
.board-panel.active { display: block; }
.board-panel.chart-wrap.active { display: flex; }

.mode-general .personalized-content { display: none !important; }
.mode-general .board-tab[data-board="canhan"] { display: none !important; }
.mode-general .board-panel[id="bpanel-canhan"] { display: none !important; }

/* TOAST */
.toast {
  position: fixed; bottom: 20px; left: 50%; transform: translateX(-50%);
  background: var(--surface); color: var(--text);
  padding: 8px 16px; border-radius: var(--radius-sm);
  font-size: .75rem; z-index: 9999;
  box-shadow: var(--shadow);
  border: 1px solid var(--border);
  transition: opacity .3s;
  opacity: 0; pointer-events: none;
}
.toast.show { opacity: 1; }

/* LOADING */
.loading {
  text-align: center; padding: 60px 20px; color: var(--text3);
}
.loading .spinner {
  width: 32px; height: 32px; border: 3px solid var(--border);
  border-top-color: var(--accent); border-radius: 50%;
  animation: spin .8s linear infinite;
  margin: 0 auto 12px;
}
@keyframes spin { to { transform: rotate(360deg); } }

/* FIREBASE AUTH */
#firebaseAuth {
  display: inline-flex; align-items: center; gap: 4px;
  font-size: .7rem;
}
#firebaseAuth button {
  font-family: inherit;
}

/* RESPONSIVE */
@media (max-width: 768px) {
  html { font-size: 14px; }
  .chart-wrap { padding: 8px 4px; overflow-x: auto; -webkit-overflow-scrolling: touch; }
  .chart td.cell { width: 105px; height: 120px; }
  .el .hz { font-size: .9rem; }
  .el .lbl { font-size: .38rem; max-width: 38px; }
  .el-tb .hz { font-size: .9rem; }
  .el-db .hz { font-size: .78rem; }
  .el-tinh .hz, .el-mon .hz, .el-than .hz { font-size: .6rem; }
  .el-num { font-size: .9rem; }
  .chart td.edge, .chart th.edge { width: 22px; font-size: .6rem; padding: 2px 1px; }
  .chart th.edge-top, .chart th.edge-bot, .chart td.edge-top, .chart td.edge-bot { height: 20px; font-size: .55rem; }
  .cell-row { padding: 1px 3px; }
  .cell-row.top { min-height: 32px; padding-top: 2px; }
  .cell-row.mid { min-height: 36px; }
  .cell-row.bot { min-height: 28px; padding-bottom: 1px; }
  .el { min-width: 30px; }
  .flag { font-size: .4rem; padding: 1px 2px; }
  .flags-wrap { min-width: 30px; gap: 1px; }
  .ck-list { font-size: .45rem; padding: 1px 2px; }
  .board-tabs { gap: 4px; padding: 8px 10px; flex-wrap: wrap; }
  .board-tab { padding: 5px 10px; font-size: .7rem; }
  .nav { gap: 4px; padding: 8px 10px; }
  .nav-btn { padding: 4px 10px; font-size: .7rem; }
  .nav-label { font-size: .7rem; min-width: 80px; }
  .picker { font-size: .7rem; padding: 3px 8px; max-width: 120px; }
  .pillars { gap: 8px; padding: 10px 12px; }
  .pillar .can, .pillar .chi { font-size: 1rem; }
  .pillar-sep { font-size: .9rem; }
  .board-options { padding: 8px 14px; }
  .board-options-inner { gap: 4px 10px; }
  .content-area { padding: 10px; }
  .section-card { padding: 14px; }
  .user-form-inner { gap: 6px 10px; font-size: .7rem; }
  .header { padding: 8px 14px; }
  .header-title { font-size: .85rem; }
  .header-sub { display: none; }
}

@media (max-width: 420px) {
  .chart td.cell { width: 85px; height: 105px; }
  .el .hz { font-size: .78rem; }
  .el .lbl { font-size: .34rem; max-width: 32px; }
  .el-tb .hz { font-size: .78rem; }
  .el-db .hz { font-size: .65rem; }
  .el-tinh .hz, .el-mon .hz, .el-than .hz { font-size: .5rem; }
  .el-num { font-size: .78rem; }
  .chart td.edge, .chart th.edge { width: 18px; font-size: .5rem; }
  .chart th.edge-top, .chart th.edge-bot, .chart td.edge-top, .chart td.edge-bot { height: 16px; font-size: .45rem; }
  .cell-row.top { min-height: 26px; }
  .cell-row.mid { min-height: 30px; }
  .cell-row.bot { min-height: 22px; }
  .el { min-width: 24px; }
  .ck-list { font-size: .38rem; }
  .board-tab { padding: 4px 8px; font-size: .65rem; }
  .board-tabs { padding: 6px 8px; gap: 3px; }
  .pillar .can, .pillar .chi { font-size: .85rem; }
  .header-title { font-size: .75rem; }
}