/* ── Design tokens ───────────────────────────────────────────────────── */
:root {
  --blue:        #0984e3;
  --blue-dark:   #0873c4;
  --dark:        #1a1a2e;
  --gray:        #636e72;
  --bg:          #f0f2f5;
  --white:       #ffffff;
  --red:         #d63031;
  --amber:       #e67e22;
  --green:       #27ae60;
  --purple:      #6c5ce7;
  --border:      #ddd;
  --shadow:      0 2px 8px rgba(0,0,0,.1);
  --radius:      12px;
  --radius-sm:   6px;
}

/* ── Reset + base ────────────────────────────────────────────────────── */
*, *::before, *::after { box-sizing: border-box; }
body { margin: 0; background: var(--bg); font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif; color: var(--dark); font-size: 14px; line-height: 1.5; }
h1,h2,h3 { margin: 0 0 .5rem; font-weight: 600; }
h1 { font-size: 1.4rem; }
h2 { font-size: 1.2rem; }
h3 { font-size: .95rem; color: var(--gray); text-transform: uppercase; letter-spacing: .04em; margin-bottom: .75rem; }
a { color: var(--blue); text-decoration: none; }
a:hover { text-decoration: underline; }
p { margin: 0 0 .75rem; }
.muted { color: var(--gray); font-size: .85rem; }

/* ── Nav ─────────────────────────────────────────────────────────────── */
.nav { background: var(--dark); color: #fff; display: flex; align-items: center; justify-content: space-between; padding: .75rem 1.5rem; position: sticky; top: 0; z-index: 100; }
.nav-brand { font-weight: 700; font-size: 1rem; letter-spacing: -.01em; }
.nav-links { display: flex; align-items: center; gap: 1.25rem; font-size: .875rem; flex-wrap: wrap; row-gap: .4rem; }
.nav-links a { color: rgba(255,255,255,.85); }
.nav-links a:hover { color: #fff; text-decoration: none; }
.nav-user { color: rgba(255,255,255,.72); }
.nav-logout { color: rgba(255,255,255,.5) !important; }

/* ── Main layout ─────────────────────────────────────────────────────── */
.main { max-width: 900px; margin: 0 auto; padding: 1.5rem 1rem 4rem; }

/* ── Page header ─────────────────────────────────────────────────────── */
.page-header { display: flex; align-items: flex-start; justify-content: space-between; margin-bottom: 1.25rem; }
.page-header-left { display: flex; align-items: baseline; gap: .75rem; }
.page-subhead { color: var(--gray); font-size: .9rem; }

/* ── Status bar ──────────────────────────────────────────────────────── */
.status-bar { display: grid; grid-template-columns: repeat(4, 1fr); gap: .75rem; margin-bottom: 1.25rem; }
.status-tile { background: var(--white); border-radius: var(--radius-sm); padding: .75rem 1rem; box-shadow: var(--shadow); text-align: center; }
.status-num { font-size: 1.6rem; font-weight: 700; line-height: 1; }
.status-label { color: var(--gray); font-size: .8rem; margin-top: .25rem; }
.status-tile-new .status-num { color: var(--red); }
.status-tile-approved .status-num { color: var(--blue); }
.status-tile-disputed .status-num { color: var(--amber); }
.status-tile-done .status-num { color: var(--green); }

/* ── Tab bar ─────────────────────────────────────────────────────────── */
.tab-bar { display: flex; gap: 0; border-bottom: 2px solid var(--border); margin-bottom: 1rem; }
.tab { padding: .6rem 1.25rem; color: var(--gray); font-size: .875rem; font-weight: 500; display: flex; align-items: center; gap: .5rem; border-bottom: 2px solid transparent; margin-bottom: -2px; }
.tab:hover { color: var(--dark); text-decoration: none; }
.tab-active { color: var(--blue); border-bottom-color: var(--blue); }
.tab-badge { font-size: .75rem; padding: .1rem .4rem; border-radius: 99px; font-weight: 700; }
.tab-badge-critical { background: #ffeaea; color: var(--red); }
.tab-badge-advisory { background: #fef3e2; color: var(--amber); }
.tab-badge-info { background: #f0f2f5; color: var(--gray); }

/* ── Audit cards ─────────────────────────────────────────────────────── */
.card-list { display: flex; flex-direction: column; gap: .75rem; }
.audit-card { background: var(--white); border-radius: var(--radius); box-shadow: var(--shadow); padding: 1rem 1.25rem; border-left: 4px solid transparent; transition: opacity .2s; }
.audit-card:has(.priority-critical) { border-left-color: var(--red); }
.audit-card:has(.priority-advisory) { border-left-color: var(--amber); }
.audit-card:has(.priority-info)     { border-left-color: var(--border); }
.audit-card--reviewed { opacity: .65; }
.card-reviewed-banner { font-size: .8rem; color: var(--gray); margin-bottom: .5rem; }

.card-header { display: flex; justify-content: space-between; align-items: flex-start; margin-bottom: .6rem; }
.card-identity { display: flex; flex-wrap: wrap; align-items: center; gap: .5rem; }
.patient-name { font-weight: 600; font-size: .95rem; }
.card-meta { color: var(--gray); font-size: .82rem; }

.card-body { margin-bottom: .75rem; }
.card-codes { display: flex; flex-wrap: wrap; align-items: center; gap: .4rem; margin-bottom: .4rem; }
.card-delta { font-weight: 600; font-size: .9rem; margin-left: .25rem; }
.card-reason { font-size: .85rem; color: var(--gray); margin: .25rem 0; }
.card-drivers { display: flex; flex-wrap: wrap; gap: .35rem; margin-top: .4rem; }

.card-actions { display: flex; align-items: center; justify-content: space-between; }
.card-action-btns { display: flex; gap: .5rem; align-items: center; }

/* ── Evidence panel ──────────────────────────────────────────────────── */
.evidence-panel { border-top: 1px solid var(--border); margin-top: .75rem; padding-top: .75rem; font-size: .85rem; }
.evidence-link { color: var(--blue); }

/* ── Pills ───────────────────────────────────────────────────────────── */
.pill { display: inline-block; padding: .15rem .5rem; border-radius: 99px; font-size: .8rem; font-weight: 600; }
.pill-add  { background: #e6f9f0; color: var(--green); }
.pill-drop { background: #ffeaea; color: var(--red); }

/* ── Driver tags ─────────────────────────────────────────────────────── */
.driver-tag { display: inline-block; padding: .1rem .5rem; border-radius: 99px; font-size: .75rem; background: #f0f2f5; color: var(--gray); border: 1px solid var(--border); }

/* ── Trust badges ────────────────────────────────────────────────────── */
.trust-badge { display: inline-block; padding: .2rem .6rem; border-radius: 99px; font-size: .75rem; font-weight: 700; border: 1.5px solid; }
.trust-trusted      { background: #e6f9f0; color: var(--green); border-color: var(--green); }
.trust-low          { background: #fef3e2; color: var(--amber); border-color: var(--amber); }
.trust-insufficient { background: #ffeaea; color: var(--red); border-color: var(--red); }

/* ── Priority badges ─────────────────────────────────────────────────── */
.priority-badge { display: inline-block; font-size: .78rem; font-weight: 700; padding: .15rem .5rem; border-radius: 99px; }
.priority-critical { background: #ffeaea; color: var(--red); }
.priority-advisory { background: #fef3e2; color: var(--amber); }
.priority-info     { background: #f0f2f5; color: var(--gray); }

/* ── Status badges ───────────────────────────────────────────────────── */
.status-badge { font-size: .78rem; font-weight: 600; padding: .15rem .5rem; border-radius: 99px; }
.status-approved { background: #e6f0ff; color: var(--blue); }
.status-disputed  { background: #fef3e2; color: var(--amber); }
.status-kept      { background: #f0f2f5; color: var(--gray); }

/* ── Delta ───────────────────────────────────────────────────────────── */
.delta-positive { color: var(--green); font-weight: 600; }
.delta-negative { color: var(--red); font-weight: 600; }
.delta-uncertain { font-weight: 400; font-size: .85em; opacity: .7; }

/* ── Buttons ─────────────────────────────────────────────────────────── */
.btn { display: inline-block; padding: .4rem .9rem; border-radius: var(--radius-sm); font-size: .82rem; font-weight: 500; cursor: pointer; border: 1.5px solid transparent; white-space: nowrap; }
.btn-primary { background: var(--blue); color: #fff; border-color: var(--blue); }
.btn-primary:hover { background: var(--blue-dark); }
.btn-approve { background: var(--green); color: #fff; border-color: var(--green); }
.btn-approve:hover { opacity: .9; }
.btn-dispute { background: var(--white); color: var(--amber); border-color: var(--amber); }
.btn-dispute:hover { background: #fef3e2; }
.btn-neutral { background: var(--white); color: var(--gray); border-color: var(--border); }
.btn-neutral:hover { background: var(--bg); }
.btn-link { background: none; border: none; color: var(--blue); cursor: pointer; font-size: .82rem; padding: .4rem 0; }
.btn-link-small { font-size: .78rem; color: var(--gray); background: none; border: none; cursor: pointer; padding: .4rem .6rem; }
.btn-toggle { font-size: .78rem; background: none; border: 1px solid var(--border); color: var(--blue); padding: .15rem .5rem; border-radius: 99px; cursor: pointer; margin-left: .5rem; vertical-align: middle; }

/* ── Day filter ──────────────────────────────────────────────────────── */
.day-filter { padding: .35rem .6rem; border-radius: var(--radius-sm); border: 1.5px solid var(--border); font-size: .85rem; color: var(--dark); background: var(--white); cursor: pointer; }

/* ── Done section ─────────────────────────────────────────────────────── */
.done-section { margin-top: 2rem; }
.done-section > summary { cursor: pointer; color: var(--gray); font-size: .85rem; margin-bottom: .75rem; }

/* ── Empty state ─────────────────────────────────────────────────────── */
.empty-state { text-align: center; padding: 3rem 1rem; color: var(--gray); font-size: 1rem; background: var(--white); border-radius: var(--radius); box-shadow: var(--shadow); }

/* ── Modals ──────────────────────────────────────────────────────────── */
.modal-overlay { position: fixed; inset: 0; background: rgba(0,0,0,.45); display: flex; align-items: center; justify-content: center; z-index: 200; }
.modal { background: var(--white); border-radius: var(--radius); padding: 1.5rem; max-width: 440px; width: 90%; box-shadow: 0 8px 32px rgba(0,0,0,.2); }
.modal h3 { margin-bottom: .75rem; }
.modal-subhead { color: var(--gray); font-size: .85rem; margin-bottom: 1rem; }
.modal-warning { font-size: .82rem; color: var(--gray); background: #fef3e2; border-radius: var(--radius-sm); padding: .75rem; margin: .75rem 0; }
.modal-codes { margin-bottom: .75rem; }
.modal-delta { font-size: .9rem; margin-bottom: .5rem; }
.modal-footer { display: flex; gap: .75rem; margin-top: 1.25rem; }
.checkbox-label { display: flex; align-items: center; gap: .5rem; font-size: .85rem; cursor: pointer; }
.input-row { display: flex; align-items: center; gap: .5rem; }
.input-row input { padding: .4rem .6rem; border: 1.5px solid var(--border); border-radius: var(--radius-sm); font-size: .9rem; width: 120px; }

/* ── Dispute reasons ─────────────────────────────────────────────────── */
.dispute-reasons { display: flex; flex-direction: column; gap: .4rem; margin-bottom: .75rem; }
.reason-option { display: flex; align-items: center; gap: .5rem; font-size: .85rem; cursor: pointer; }
.dispute-note { width: 100%; padding: .6rem; border: 1.5px solid var(--border); border-radius: var(--radius-sm); font-size: .85rem; min-height: 80px; resize: vertical; font-family: inherit; }

/* ── Toast ───────────────────────────────────────────────────────────── */
.toast { position: fixed; bottom: 1.5rem; right: 1.5rem; padding: .75rem 1.25rem; border-radius: var(--radius-sm); font-size: .875rem; font-weight: 500; z-index: 300; animation: fadeIn .2s; }
.toast-success { background: var(--green); color: #fff; }
.toast-error   { background: var(--red); color: #fff; }
@keyframes fadeIn { from { opacity: 0; transform: translateY(8px); } to { opacity: 1; transform: none; } }

/* ── Detail page ─────────────────────────────────────────────────────── */
.detail-back { margin-bottom: 1rem; font-size: .85rem; }
.missingness-banner { background: #fef3e2; border: 1.5px solid var(--amber); border-radius: var(--radius-sm); padding: .75rem 1rem; margin-bottom: 1rem; font-size: .85rem; color: #7d4e00; }
.detail-header { display: flex; justify-content: space-between; align-items: flex-start; margin-bottom: 1.25rem; }
.detail-meta { color: var(--gray); font-size: .85rem; margin-top: .15rem; }
.detail-badges { display: flex; flex-direction: column; align-items: flex-end; gap: .4rem; }
.detail-delta { font-size: 1.1rem; font-weight: 700; }
.detail-section { background: var(--white); border-radius: var(--radius); box-shadow: var(--shadow); padding: 1.25rem; margin-bottom: .75rem; }

/* CPT compare */
.cpt-compare { display: grid; grid-template-columns: 1fr 1fr; gap: 1rem; }
.cpt-col-header { font-size: .78rem; font-weight: 700; text-transform: uppercase; letter-spacing: .05em; color: var(--gray); margin-bottom: .5rem; }
.cpt-row { display: flex; align-items: center; gap: .5rem; padding: .3rem 0; border-bottom: 1px solid var(--bg); }
.cpt-code { font-family: monospace; font-size: .9rem; font-weight: 600; }
.cpt-indicator { font-size: .75rem; font-weight: 600; }
.cpt-indicator-ok   { color: var(--green); }
.cpt-indicator-drop { color: var(--red); }
.cpt-indicator-add  { color: var(--blue); background: #e6f0ff; padding: .1rem .4rem; border-radius: 99px; }
.cpt-empty { color: var(--gray); font-size: .85rem; }
.cpt-flagged .cpt-code { color: var(--red); }
.cpt-new .cpt-code { color: var(--blue); }

/* Diagnoses */
.dx-row { display: flex; gap: .75rem; padding: .3rem 0; border-bottom: 1px solid var(--bg); font-size: .88rem; }
.dx-row-historical { opacity: .6; }
.dx-code { font-family: monospace; font-weight: 600; min-width: 70px; color: var(--dark); }
.dx-desc { color: var(--gray); }
.dx-divider { font-size: .78rem; color: var(--gray); text-transform: uppercase; letter-spacing: .05em; margin: .75rem 0 .5rem; }
.dx-inline { font-size: .82rem; }
.dx-role { color: var(--gray); font-size: .75em; }

/* Line items */
.line-item { padding: .75rem 0; border-bottom: 1px solid var(--bg); }
.line-item:last-child { border-bottom: none; }
.line-item-header { display: flex; align-items: center; gap: .6rem; margin-bottom: .3rem; }
.line-item-desc { color: var(--gray); font-size: .85rem; }
.line-item-fee { margin-left: auto; font-size: .82rem; color: var(--gray); }
.line-item-reason { font-size: .85rem; color: var(--dark); margin: .25rem 0; }
.line-item-support { font-size: .8rem; color: var(--gray); }

/* Audit explanation */
.audit-explanation { font-size: .9rem; line-height: 1.6; color: var(--dark); }
.doc-gap { font-size: .85rem; background: #fef3e2; padding: .6rem .75rem; border-radius: var(--radius-sm); margin-top: .5rem; }

/* Provenance */
.detail-provenance summary { cursor: pointer; color: var(--gray); font-size: .82rem; }
.provenance-table { width: 100%; border-collapse: collapse; margin-top: .75rem; font-size: .82rem; }
.provenance-table td { padding: .3rem .5rem; border-bottom: 1px solid var(--bg); }
.provenance-table td:first-child { color: var(--gray); width: 45%; }
.provenance-note { font-size: .78rem; color: var(--gray); margin-top: .75rem; font-style: italic; }

/* Decision form */
.detail-decision { }
.radio-option { display: flex; align-items: flex-start; gap: .5rem; font-size: .88rem; cursor: pointer; padding: .4rem 0; }
.already-reviewed { font-size: .88rem; color: var(--gray); }
.review-note { font-style: italic; margin-top: .5rem; }

/* ── Biller page ─────────────────────────────────────────────────────── */
.biller-list { display: flex; flex-direction: column; gap: .75rem; }
.biller-card { background: var(--white); border-radius: var(--radius); box-shadow: var(--shadow); padding: 1rem 1.25rem; }
.biller-card-header { display: flex; justify-content: space-between; align-items: flex-start; margin-bottom: .6rem; }
.biller-card-delta { font-size: 1.1rem; font-weight: 700; }
.biller-codes { margin-bottom: .6rem; font-size: .88rem; display: flex; flex-direction: column; gap: .3rem; }
.provider-note { font-size: .82rem; color: var(--gray); font-style: italic; margin-bottom: .6rem; background: #f0f2f5; padding: .4rem .75rem; border-radius: var(--radius-sm); }
.biller-actions { display: flex; gap: .5rem; flex-wrap: wrap; }

/* ── Login page ──────────────────────────────────────────────────────── */
.page-login { display: flex; align-items: center; justify-content: center; min-height: 100vh; }
.login-card { background: var(--white); padding: 2.5rem; border-radius: var(--radius); box-shadow: var(--shadow); width: 100%; max-width: 360px; }
.login-card h2 { text-align: center; margin-bottom: .25rem; }
.login-subtitle { text-align: center; color: var(--gray); font-size: .85rem; margin-bottom: 1.5rem; }
.form-group { margin-bottom: 1rem; }
.form-group label { display: block; font-size: .85rem; font-weight: 500; margin-bottom: .4rem; }
.form-group input, .form-group select { width: 100%; padding: .55rem .75rem; border: 1.5px solid var(--border); border-radius: var(--radius-sm); font-size: .9rem; font-family: inherit; transition: border-color .15s; }
.form-group input:focus, .form-group select:focus { border-color: var(--blue); }

/* Visible keyboard focus everywhere (WCAG 2.4.7). Mouse clicks don't trigger
   :focus-visible, so this only shows for keyboard/AT users. */
:focus-visible { outline: 3px solid #155e75; outline-offset: 2px; }
/* On the dark nav bar the teal ring is nearly invisible — use white (~15:1). */
.nav :focus-visible { outline-color: #fff; }
.btn-block { width: 100%; padding: .6rem; font-size: .95rem; text-align: center; }
.login-error { background: #ffeaea; color: var(--red); border-radius: var(--radius-sm); padding: .6rem .75rem; font-size: .85rem; margin-bottom: 1rem; }

/* ── Responsive ──────────────────────────────────────────────────────── */
@media (max-width: 640px) {
  .status-bar { grid-template-columns: repeat(2, 1fr); }
  .cpt-compare { grid-template-columns: 1fr; }
  .card-action-btns { flex-wrap: wrap; }
  .detail-header { flex-direction: column; gap: .75rem; }
  .detail-badges { align-items: flex-start; }
}