/* ============================================================
   ABG Calculator — abg.css
   Load /css/style.css FIRST, then this file
   ============================================================ */

/* ── Unit Toggle ─────────────────────────────────────────── */
.abg-unit-bar { display:flex; background:#f1f5f9; border-radius:12px; padding:4px; gap:4px; margin-bottom:18px; }
.abg-unit-tab { flex:1; padding:8px; border-radius:9px; border:none; font-family:'Lexend',sans-serif; font-size:12px; font-weight:600; cursor:pointer; transition:all 0.2s; color:#64748b; background:transparent; text-align:center; }
.abg-unit-tab.active { background:#1D3557; color:#fff; box-shadow:0 2px 8px rgba(0,0,0,0.12); }

/* ── ABG Input Grid ──────────────────────────────────────── */
.abg-grid { display:grid; grid-template-columns:1fr 1fr; gap:12px; margin-bottom:14px; }
.abg-grid-3 { display:grid; grid-template-columns:1fr 1fr 1fr; gap:10px; margin-bottom:14px; }
.abg-field-label { font-family:'Lexend',sans-serif; font-size:10px; font-weight:600; color:#64748b; text-transform:uppercase; letter-spacing:0.06em; display:block; margin-bottom:5px; }
.abg-normal-hint { font-family:'Inter',sans-serif; font-size:10px; color:#94a3b8; margin-top:3px; }

/* ── Result Area ─────────────────────────────────────────── */
#abg-result-area { display:none; margin-top:22px; }
#abg-result-area.show { display:block; animation:fadeInUp 0.45s ease forwards; }

/* ── Primary Disorder Card ───────────────────────────────── */
.disorder-card { border-radius:14px; padding:16px 18px; margin-bottom:14px; border:2px solid; }
.disorder-card-title { font-family:'Lexend',sans-serif; font-weight:800; font-size:17px; margin-bottom:4px; }
.disorder-card-sub { font-family:'Inter',sans-serif; font-size:12px; line-height:1.6; }
/* Disorder colours */
.dc-resp-acid  { background:#fff1f2; border-color:#fca5a5; }
.dc-resp-acid .disorder-card-title { color:#be123c; }
.dc-resp-acid .disorder-card-sub { color:#9f1239; }
.dc-resp-alk   { background:#eff6ff; border-color:#93c5fd; }
.dc-resp-alk .disorder-card-title { color:#1e40af; }
.dc-resp-alk .disorder-card-sub { color:#1e3a8a; }
.dc-met-acid   { background:#fff7ed; border-color:#fdba74; }
.dc-met-acid .disorder-card-title { color:#c2410c; }
.dc-met-acid .disorder-card-sub { color:#9a3412; }
.dc-met-alk    { background:#f0fdf4; border-color:#86efac; }
.dc-met-alk .disorder-card-title { color:#15803d; }
.dc-met-alk .disorder-card-sub { color:#14532d; }
.dc-normal     { background:#f0fdf4; border-color:#6ee7b7; }
.dc-normal .disorder-card-title { color:#0f766e; }
.dc-normal .disorder-card-sub { color:#134e4a; }
.dc-mixed      { background:#faf5ff; border-color:#c4b5fd; }
.dc-mixed .disorder-card-title { color:#7c3aed; }
.dc-mixed .disorder-card-sub { color:#5b21b6; }

/* ── Compensation Card ───────────────────────────────────── */
.compensation-card { background:#f8fafc; border:1px solid #e2e8f0; border-radius:12px; padding:14px 16px; margin-bottom:12px; }
.compensation-title { font-family:'Lexend',sans-serif; font-weight:700; color:#1D3557; font-size:13px; margin-bottom:10px; display:flex; align-items:center; gap:6px; }
.comp-row { display:flex; justify-content:space-between; align-items:center; padding:5px 0; border-bottom:1px solid #f1f5f9; font-family:'Inter',sans-serif; font-size:12px; color:#475569; }
.comp-row:last-child { border-bottom:none; }
.comp-label { color:#64748b; }
.comp-val { font-family:'Lexend',sans-serif; font-weight:700; color:#1D3557; }
.comp-status { padding:2px 8px; border-radius:20px; font-family:'Lexend',sans-serif; font-size:10px; font-weight:700; }
.comp-ok    { background:#dcfce7; color:#166534; }
.comp-over  { background:#dbeafe; color:#1e40af; }
.comp-under { background:#fee2e2; color:#991b1b; }
.comp-mixed { background:#faf5ff; color:#6d28d9; }

/* ── 6-Panel Calculated Values ───────────────────────────── */
.abg-panels { display:grid; grid-template-columns:repeat(3,1fr); gap:10px; margin-bottom:14px; }
.abg-panel { background:#f8fafc; border:1px solid #e2e8f0; border-radius:12px; padding:12px; }
.abg-panel-label { font-family:'Inter',sans-serif; font-size:10px; color:#94a3b8; text-transform:uppercase; letter-spacing:0.05em; margin-bottom:4px; }
.abg-panel-val { font-family:'Lexend',sans-serif; font-weight:800; font-size:20px; color:#1D3557; line-height:1; margin-bottom:2px; }
.abg-panel-status { font-family:'Inter',sans-serif; font-size:10px; }
.panel-low  { color:#3b82f6; }
.panel-norm { color:#16a34a; }
.panel-high { color:#dc2626; }

/* ── Tic-Tac-Toe Visual ──────────────────────────────────── */
.ttt-wrap { background:#fff; border:1px solid #e2e8f0; border-radius:12px; padding:14px; margin-bottom:12px; }
.ttt-title { font-family:'Lexend',sans-serif; font-weight:700; color:#1D3557; font-size:13px; margin-bottom:10px; display:flex; align-items:center; gap:6px; }
.ttt-grid { display:grid; grid-template-columns:1fr 1fr 1fr; gap:3px; max-width:300px; margin:0 auto; }
.ttt-cell { background:#f8fafc; border:1px solid #e2e8f0; border-radius:8px; padding:10px 8px; text-align:center; transition:all 0.3s; }
.ttt-cell.active-disorder { background:#1D3557; border-color:#1D3557; }
.ttt-cell.active-disorder .ttt-cell-label { color:#fff; }
.ttt-cell.active-disorder .ttt-cell-val { color:#f1f5f9; }
.ttt-cell.active-compensation { background:#E63946; border-color:#E63946; }
.ttt-cell.active-compensation .ttt-cell-label { color:#fff; }
.ttt-cell.active-compensation .ttt-cell-val { color:#fee2e2; }
.ttt-cell-label { font-family:'Lexend',sans-serif; font-size:9px; font-weight:700; color:#64748b; text-transform:uppercase; letter-spacing:0.04em; margin-bottom:3px; }
.ttt-cell-val { font-family:'Lexend',sans-serif; font-size:13px; font-weight:800; color:#1D3557; }
.ttt-dividers { display:flex; justify-content:center; gap:3px; margin:3px 0; }
.ttt-row-label { font-family:'Lexend',sans-serif; font-size:9px; font-weight:700; color:#94a3b8; text-align:center; text-transform:uppercase; letter-spacing:0.04em; padding:3px 0; }
.ttt-legend { display:flex; gap:12px; justify-content:center; margin-top:8px; flex-wrap:wrap; }
.ttt-legend-item { display:flex; align-items:center; gap:4px; font-family:'Inter',sans-serif; font-size:10px; color:#64748b; }
.ttt-legend-dot { width:10px; height:10px; border-radius:3px; }

/* ── Step-by-Step Panel ──────────────────────────────────── */
.steps-panel { background:#faf5ff; border:1px solid #e9d5ff; border-radius:12px; padding:14px 16px; margin-bottom:12px; display:none; }
.steps-panel.show { display:block; }
.steps-title { font-family:'Lexend',sans-serif; font-weight:700; color:#6b21a8; font-size:13px; margin-bottom:10px; }
.step-item { display:flex; align-items:flex-start; gap:10px; margin-bottom:10px; font-family:'Inter',sans-serif; font-size:12px; color:#4c1d95; line-height:1.6; }
.step-num { width:22px; height:22px; border-radius:50%; background:#7c3aed; color:#fff; font-family:'Lexend',sans-serif; font-weight:700; font-size:11px; display:flex; align-items:center; justify-content:center; flex-shrink:0; margin-top:1px; }
.step-content { flex:1; }
.step-label { font-family:'Lexend',sans-serif; font-weight:700; font-size:12px; color:#6b21a8; margin-bottom:2px; }

/* ── Additional Metrics ──────────────────────────────────── */
.metrics-panels { display:grid; grid-template-columns:repeat(2,1fr); gap:10px; margin-bottom:12px; }
.metric-card { background:#fff; border:1px solid #e2e8f0; border-radius:12px; padding:12px; }
.metric-title { font-family:'Lexend',sans-serif; font-weight:700; color:#1D3557; font-size:12px; margin-bottom:6px; display:flex; align-items:center; gap:4px; }
.metric-val { font-family:'Lexend',sans-serif; font-weight:800; font-size:22px; color:#1D3557; margin-bottom:2px; }
.metric-note { font-family:'Inter',sans-serif; font-size:11px; color:#64748b; line-height:1.5; }
.metric-status { font-family:'Inter',sans-serif; font-size:11px; font-weight:600; }

/* ── Practice Quiz Banner ────────────────────────────────── */
.quiz-banner { background:linear-gradient(135deg,#1D3557 0%,#2d4f7f 100%); border-radius:12px; padding:14px 16px; margin-bottom:12px; display:flex; align-items:center; gap:12px; }
.quiz-banner-text { flex:1; }
.quiz-banner-title { font-family:'Lexend',sans-serif; font-weight:700; color:#fff; font-size:13px; margin-bottom:3px; }
.quiz-banner-sub { font-family:'Inter',sans-serif; font-size:11px; color:rgba(255,255,255,0.7); }
.quiz-btn { background:#E63946; color:#fff; border:none; border-radius:8px; padding:8px 14px; font-family:'Lexend',sans-serif; font-weight:700; font-size:12px; cursor:pointer; white-space:nowrap; transition:background 0.2s; flex-shrink:0; }
.quiz-btn:hover { background:#c0303c; }

/* ── Reference Tables ────────────────────────────────────── */
.abg-ref-table { width:100%; border-collapse:collapse; border-radius:12px; overflow:hidden; border:1px solid #e2e8f0; margin-bottom:24px; }
.abg-ref-table thead tr { background:#1D3557; }
.abg-ref-table th { text-align:left; padding:10px 12px; font-family:'Lexend',sans-serif; font-weight:600; font-size:11px; color:#fff; }
.abg-ref-table td { padding:9px 12px; font-family:'Inter',sans-serif; font-size:12px; color:#475569; border-bottom:1px solid #f1f5f9; }
.abg-ref-table tbody tr:nth-child(even) { background:#f8fafc; }
.abg-ref-table tbody tr:last-child td { border-bottom:none; }
.abg-ref-table tbody tr:hover { background:#eff6ff; }
.disorder-name { font-weight:600; color:#1D3557; }
.tag-racd { background:#fee2e2; color:#991b1b; padding:2px 7px; border-radius:20px; font-size:10px; font-weight:700; }
.tag-ralk { background:#dbeafe; color:#1e40af; padding:2px 7px; border-radius:20px; font-size:10px; font-weight:700; }
.tag-macd { background:#ffedd5; color:#9a3412; padding:2px 7px; border-radius:20px; font-size:10px; font-weight:700; }
.tag-malk { background:#dcfce7; color:#166534; padding:2px 7px; border-radius:20px; font-size:10px; font-weight:700; }

/* ── Formula Box ─────────────────────────────────────────── */
.abg-formula-box { background:#1e293b; border-radius:12px; padding:18px 20px; margin-bottom:20px; }
.abg-formula-label { color:#94a3b8; font-size:11px; font-family:'Inter',sans-serif; font-weight:600; text-transform:uppercase; letter-spacing:0.06em; margin-bottom:8px; }
.abg-formula-eq { font-family:'Courier New',monospace; font-size:12px; line-height:2; }
.af-green  { color:#4ade80; }
.af-white  { color:#e2e8f0; }
.af-yellow { color:#facc15; }
.af-blue   { color:#93c5fd; }
.af-gray   { color:#64748b; }
.af-red    { color:#f87171; }

/* ── Stat Strip ──────────────────────────────────────────── */
.stat-strip-abg { display:grid; grid-template-columns:repeat(4,1fr); gap:10px; margin-bottom:24px; }
.stat-strip-box-abg { background:#fff; border:1px solid #e2e8f0; border-radius:10px; padding:12px; text-align:center; }
.stat-strip-num-abg { font-family:'Lexend',sans-serif; font-weight:800; font-size:18px; color:#1D3557; }
.stat-strip-num-abg.red { color:#E63946; }
.stat-strip-label-abg { font-family:'Inter',sans-serif; font-size:10px; color:#94a3b8; text-transform:uppercase; letter-spacing:0.04em; margin-top:2px; }

/* ── Tips Grid ───────────────────────────────────────────── */
.tips-grid-abg { display:grid; grid-template-columns:1fr 1fr; gap:14px; margin-bottom:24px; }
.tip-card-abg { background:#fff; border:1px solid #e2e8f0; border-radius:12px; padding:16px; }
.tip-icon-abg { font-size:22px; margin-bottom:8px; }
.tip-title-abg { font-family:'Lexend',sans-serif; font-weight:600; color:#1D3557; font-size:14px; margin-bottom:6px; }
.tip-body-abg { font-family:'Inter',sans-serif; font-size:12px; color:#64748b; line-height:1.6; }

/* ── Highlight Box ───────────────────────────────────────── */
.highlight-box-abg { background:linear-gradient(135deg,#fff5f5 0%,#fef2f2 100%); border-left:4px solid #E63946; border-radius:0 12px 12px 0; padding:16px 18px; margin-bottom:24px; }
.highlight-box-abg p { font-size:13px; margin-bottom:0; }

/* ── Hero Badge ──────────────────────────────────────────── */
.abg-hero-badge { display:inline-flex; align-items:center; gap:6px; background:linear-gradient(135deg,#1D3557 0%,#2d4f7f 100%); color:#fff; border-radius:20px; padding:5px 14px; font-size:12px; font-weight:600; font-family:'Lexend',sans-serif; letter-spacing:0.3px; margin-bottom:16px; }

/* ── Normal Values Reference Bar ─────────────────────────── */
.normal-bar { display:flex; gap:6px; flex-wrap:wrap; margin-bottom:14px; }
.normal-tag { display:inline-flex; align-items:center; gap:4px; background:#f0fdf4; border:1px solid #86efac; border-radius:8px; padding:4px 10px; font-family:'Lexend',sans-serif; font-size:11px; font-weight:600; color:#15803d; }

/* ── ABG Practice Quiz ───────────────────────────────────── */
.quiz-section { background:#f8fafc; border:1px solid #e2e8f0; border-radius:14px; padding:20px; margin-bottom:0; }
.quiz-case { display:none; }
.quiz-case.active { display:block; }
.quiz-case-title { font-family:'Lexend',sans-serif; font-weight:700; color:#1D3557; font-size:14px; margin-bottom:12px; }
.quiz-values { display:grid; grid-template-columns:repeat(4,1fr); gap:8px; margin-bottom:14px; }
.quiz-val-box { background:#fff; border:1px solid #e2e8f0; border-radius:10px; padding:10px; text-align:center; }
.quiz-val-num { font-family:'Lexend',sans-serif; font-weight:800; font-size:18px; color:#1D3557; }
.quiz-val-label { font-family:'Inter',sans-serif; font-size:10px; color:#94a3b8; }
.quiz-options { display:grid; grid-template-columns:1fr 1fr; gap:8px; margin-bottom:12px; }
.quiz-option { background:#fff; border:1.5px solid #e2e8f0; border-radius:10px; padding:10px 12px; font-family:'Lexend',sans-serif; font-size:12px; font-weight:600; color:#475569; cursor:pointer; text-align:center; transition:all 0.2s; }
.quiz-option:hover { border-color:#1D3557; color:#1D3557; }
.quiz-option.correct { background:#dcfce7; border-color:#86efac; color:#15803d; }
.quiz-option.wrong   { background:#fee2e2; border-color:#fca5a5; color:#991b1b; }
.quiz-explanation { display:none; background:#eff6ff; border:1px solid #bfdbfe; border-radius:10px; padding:12px; font-family:'Inter',sans-serif; font-size:12px; color:#1e40af; line-height:1.6; margin-bottom:10px; }
.quiz-explanation.show { display:block; }
.quiz-nav { display:flex; gap:8px; justify-content:space-between; }
.quiz-nav-btn { padding:8px 16px; border-radius:9px; border:none; font-family:'Lexend',sans-serif; font-size:12px; font-weight:600; cursor:pointer; transition:all 0.2s; }
.quiz-next { background:#1D3557; color:#fff; }
.quiz-next:hover { background:#162640; }
.quiz-counter { font-family:'Inter',sans-serif; font-size:12px; color:#94a3b8; display:flex; align-items:center; }

/* ── Responsive ──────────────────────────────────────────── */
@media (max-width:768px) {
  .abg-panels { grid-template-columns:repeat(2,1fr); }
  .ttt-grid { max-width:260px; }
  .tips-grid-abg { grid-template-columns:1fr; }
  .stat-strip-abg { grid-template-columns:repeat(2,1fr); }
  .quiz-values { grid-template-columns:repeat(2,1fr); }
  .quiz-options { grid-template-columns:1fr; }
  .metrics-panels { grid-template-columns:1fr; }
}
@media (max-width:480px) {
  .abg-grid { grid-template-columns:1fr; }
  .abg-panels { grid-template-columns:1fr 1fr; }
}
@media print {
  .abg-unit-bar,.share-row,.sidebar-card,.calc-btn,.quiz-section,.steps-panel { display:none !important; }
}