/* ============================================
   Urology Calculators — Mobile-first styles
   ============================================ */

:root {
  --bg: #0d1117;
  --surface: #161b22;
  --border: #30363d;
  --text: #e6edf3;
  --text-muted: #8b949e;
  --accent: #1a5276;
  --accent-light: #2980b9;
  --accent-glow: rgba(41, 128, 185, 0.2);
  --danger: #da3633;
  --success: #238636;
  --warning: #d29922;
  --radius: 12px;
  --font: system-ui, -apple-system, sans-serif;
}

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

body {
  background: var(--bg);
  color: var(--text);
  font-family: var(--font);
  line-height: 1.6;
  min-height: 100dvh;
  display: flex;
  flex-direction: column;
}

/* ---- Header ---- */
header {
  background: linear-gradient(135deg, var(--accent), #1a6f9e);
  padding: 1.25rem 1rem;
  text-align: center;
}
header h1 { font-size: 1.5rem; font-weight: 700; }
header .subtitle { color: rgba(255,255,255,0.75); font-size: 0.875rem; margin-top: 0.25rem; }

/* ---- Tab Navigation ---- */
#tab-nav {
  display: flex;
  gap: 0.5rem;
  padding: 0.75rem 1rem;
  background: var(--surface);
  border-bottom: 1px solid var(--border);
}
.tab-btn {
  flex: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.7rem 1rem;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  color: var(--text-muted);
  font-size: 0.95rem;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.15s;
}
.tab-btn:hover { border-color: var(--accent-light); color: var(--text); }
.tab-btn.tab-active {
  background: var(--accent);
  border-color: var(--accent);
  color: #fff;
  box-shadow: 0 0 0 3px var(--accent-glow);
}
.tab-icon { font-size: 1.1rem; }

/* ---- Search Bar ---- */
#search-bar {
  padding: 0.75rem 1rem;
  background: var(--surface);
  border-bottom: 1px solid var(--border);
}
#search {
  width: 100%;
  padding: 0.6rem 1rem;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  color: var(--text);
  font-size: 1rem;
}
#search:focus { outline: 2px solid var(--accent-light); border-color: var(--accent-light); }

/* ---- Tab Panels ---- */
#panel-calc, #panel-fc { flex: 1; display: flex; flex-direction: column; }
#panel-calc.hidden, #panel-fc.hidden { display: none; }

/* ---- Main / Cards (per panel) ---- */
#panel-calc main, #panel-fc main {
  flex: 1;
  padding: 1rem;
  display: flex;
  flex-direction: column;
  gap: 0;
}

/* ---- Topic Sections ---- */
.topic-section {
  margin-bottom: 1.75rem;
}
.topic-section:last-child { margin-bottom: 0; }
.topic-header {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  margin-bottom: 0.85rem;
  padding-bottom: 0.5rem;
  border-bottom: 1px solid var(--border);
}
.topic-icon { font-size: 1.1rem; }
.topic-title {
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--accent-light);
}
.topic-count {
  margin-left: auto;
  font-size: 0.7rem;
  color: var(--text-muted);
  background: rgba(41,128,185,0.1);
  border: 1px solid rgba(41,128,185,0.2);
  border-radius: 999px;
  padding: 0.1rem 0.5rem;
}
.topic-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 0.75rem;
}

/* ---- Card ---- */
.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1rem 1.1rem;
  cursor: pointer;
  transition: border-color 0.2s, box-shadow 0.2s, transform 0.15s;
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
}
.card:hover, .card:focus {
  border-color: var(--accent-light);
  box-shadow: 0 0 0 3px var(--accent-glow);
  transform: translateY(-2px);
}
.card:active { transform: translateY(0); }
.card-category {
  font-size: 0.65rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--accent-light);
  font-weight: 600;
}
.card h2 { font-size: 0.95rem; font-weight: 600; color: var(--text); }
.card p { font-size: 0.8rem; color: var(--text-muted); flex: 1; line-height: 1.4; }
.card-tags { display: flex; flex-wrap: wrap; gap: 0.35rem; margin-top: 0.2rem; }
.tag {
  font-size: 0.65rem;
  background: rgba(41,128,185,0.15);
  color: var(--accent-light);
  border: 1px solid rgba(41,128,185,0.3);
  border-radius: 20px;
  padding: 0.1rem 0.45rem;
}

/* ---- Formula Transparency Banner ---- */
.formula-banner {
  margin-top: 1.5rem;
  background: var(--surface);
  border: 1px solid var(--accent-light);
  border-radius: var(--radius);
  overflow: hidden;
}
.formula-banner-header {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  padding: 0.85rem 1rem;
  background: rgba(41,128,185,0.12);
  border-bottom: 1px solid rgba(41,128,185,0.25);
  cursor: pointer;
  user-select: none;
}
.formula-banner-header:hover { background: rgba(41,128,185,0.18); }
.formula-banner-icon { font-size: 1rem; }
.formula-banner-title {
  font-size: 0.8rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--accent-light);
  flex: 1;
}
.formula-banner-toggle {
  font-size: 0.9rem;
  color: var(--text-muted);
  transition: transform 0.2s;
}
.formula-banner-toggle.open { transform: rotate(180deg); }
.formula-banner-body {
  padding: 1rem;
  display: none;
}
.formula-banner-body.open { display: block; }
.formula-main {
  font-family: 'Courier New', monospace;
  background: rgba(0,0,0,0.35);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 1rem;
  font-size: 1rem;
  color: var(--text);
  overflow-x: auto;
  line-height: 1.8;
  text-align: center;
  margin-bottom: 0.85rem;
}
.formula-variables {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 0.3rem 0.75rem;
  font-size: 0.8rem;
}
.formula-var-sym {
  font-family: 'Courier New', monospace;
  color: var(--accent-light);
  font-weight: 700;
  text-align: right;
}
.formula-var-desc { color: var(--text-muted); }

/* ---- Footer ---- */
footer {
  background: var(--surface);
  border-top: 1px solid var(--border);
  padding: 1rem;
  text-align: center;
  font-size: 0.8rem;
  color: var(--text-muted);
}
footer a { color: var(--accent-light); }

/* ---- Calculator Detail View ---- */
#calc-detail {
  position: fixed;
  inset: 0;
  background: var(--bg);
  overflow-y: auto;
  z-index: 100;
  padding: 1rem;
}
#calc-detail.hidden { display: none; }

.calc-header {
  background: linear-gradient(135deg, var(--accent), #1a6f9e);
  border-radius: var(--radius);
  padding: 1.25rem;
  margin-bottom: 1rem;
}
.calc-header h2 { font-size: 1.25rem; margin-bottom: 0.25rem; }
.calc-header .category { font-size: 0.75rem; text-transform: uppercase; letter-spacing: 0.08em; color: rgba(255,255,255,0.7); }
.back-btn {
  background: var(--surface);
  border: 1px solid var(--border);
  color: var(--text);
  padding: 0.5rem 1rem;
  border-radius: var(--radius);
  cursor: pointer;
  font-size: 0.9rem;
  margin-bottom: 1rem;
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
}
.back-btn:hover { border-color: var(--accent-light); }

/* ---- Form ---- */
.form-group { margin-bottom: 1rem; }
label { display: block; font-size: 0.85rem; color: var(--text-muted); margin-bottom: 0.3rem; }
input, select {
  width: 100%;
  padding: 0.65rem 0.85rem;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  color: var(--text);
  font-size: 1rem;
}
input:focus, select:focus { outline: 2px solid var(--accent-light); border-color: var(--accent-light); }
.calc-btn {
  width: 100%;
  padding: 0.85rem;
  background: linear-gradient(135deg, var(--accent), #1a6f9e);
  color: white;
  border: none;
  border-radius: var(--radius);
  font-size: 1rem;
  font-weight: 600;
  cursor: pointer;
  margin-top: 0.5rem;
}
.calc-btn:active { opacity: 0.85; }

/* ---- Result ---- */
.result-box {
  margin-top: 1.25rem;
  padding: 1rem;
  border-radius: var(--radius);
  border: 1px solid var(--border);
  background: var(--surface);
}
.result-box.danger { border-color: var(--danger); background: rgba(218,54,51,0.08); }
.result-box.success { border-color: var(--success); background: rgba(35,134,54,0.08); }
.result-box.warning { border-color: var(--warning); background: rgba(210,153,34,0.08); }
.result-value { font-size: 1.5rem; font-weight: 700; color: var(--text); }
.result-label { font-size: 0.85rem; color: var(--text-muted); margin-bottom: 0.5rem; }
.result-note { font-size: 0.875rem; color: var(--accent-light); margin-top: 0.5rem; font-style: italic; }
.result-row { display: flex; justify-content: space-between; align-items: center; padding: 0.4rem 0; border-bottom: 1px solid var(--border); }
.result-row:last-child { border-bottom: none; }
.result-row .result-label { margin-bottom: 0; }
.result-row .result-value { font-size: 1.1rem; }

/* ---- Info / Bibliography ---- */
.info-section {
  margin-top: 1.5rem;
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}
.info-box {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1rem;
}
.info-box h3 { font-size: 0.85rem; color: var(--accent-light); margin-bottom: 0.5rem; text-transform: uppercase; letter-spacing: 0.06em; }
.info-box p, .info-box li { font-size: 0.875rem; color: var(--text-muted); }
.info-box ul { padding-left: 1.25rem; }
.formula-block {
  font-family: 'Courier New', monospace;
  background: rgba(0,0,0,0.3);
  padding: 0.75rem;
  border-radius: 8px;
  font-size: 0.875rem;
  color: var(--text);
  overflow-x: auto;
}

.tag.closed { background: rgba(218,54,51,0.15); color: var(--danger); border-color: rgba(218,54,51,0.3); }
.tag.commercial { background: rgba(210,153,34,0.15); color: var(--warning); border-color: rgba(210,153,34,0.3); }

.info-banner {
  background: rgba(41,128,185,0.1);
  border: 1px solid rgba(41,128,185,0.3);
  border-radius: var(--radius);
  padding: 0.75rem 1rem;
  font-size: 0.875rem;
  color: var(--text-muted);
  margin-bottom: 1rem;
}
.info-banner.disclaimer {
  background: rgba(210,153,34,0.08);
  border-color: rgba(210,153,34,0.3);
  color: var(--text-muted);
}

.checkbox-group { display: flex; align-items: center; gap: 0.5rem; }
.checkbox-group input[type="checkbox"] { width: 1.2rem; height: 1.2rem; }

/* ---- No results ---- */
.no-results { text-align: center; color: var(--text-muted); padding: 3rem 1rem; grid-column: 1 / -1; }

/* ---- External calculator button ---- */
.ext-btn {
  display: inline-block;
  margin-top: 0.75rem;
  padding: 0.6rem 1.25rem;
  background: var(--accent);
  color: #fff;
  border-radius: var(--radius);
  text-decoration: none;
  font-weight: 600;
  font-size: 0.875rem;
  transition: opacity 0.15s;
}
.ext-btn:hover { opacity: 0.85; }

/* ---- Responsive ---- */
@media (min-width: 600px) {
  #panel-calc main, #panel-fc main { padding: 1.5rem; }
  .topic-grid { grid-template-columns: repeat(auto-fill, minmax(300px, 1fr)); }
}

/* ============================================
   FLOWCHARTS — Prostate Cancer EAU 2026
   ============================================ */

.fc-page { padding: 0; }

.fc-header {
  background: linear-gradient(135deg, var(--accent), #1a6f9e);
  border-radius: var(--radius);
  padding: 1.25rem;
  margin-bottom: 1.25rem;
}
.fc-header h2 { font-size: 1.2rem; margin: 0.5rem 0 0.25rem; }
.fc-header p { color: rgba(255,255,255,0.75); font-size: 0.875rem; margin: 0; }

.fc-guideline-badge {
  display: inline-block;
  background: rgba(255,255,255,0.15);
  border: 1px solid rgba(255,255,255,0.3);
  color: rgba(255,255,255,0.9);
  font-size: 0.7rem;
  font-weight: 700;
  letter-spacing: 0.05em;
  padding: 0.2rem 0.6rem;
  border-radius: 999px;
  text-transform: uppercase;
}

/* Flowchart container */
.fc-flowchart {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0;
  padding: 1rem 0;
  overflow-x: auto;
}

.fc-node {
  display: flex;
  align-items: flex-start;
  gap: 0.75rem;
  padding: 0.75rem 1rem;
  border-radius: var(--radius);
  border: 2px solid var(--border);
  background: var(--surface);
  min-width: 240px;
  max-width: 320px;
  width: 100%;
  cursor: pointer;
  transition: border-color 0.15s, box-shadow 0.15s;
}
.fc-node:hover, .fc-node.fc-active {
  border-color: var(--accent-light);
  box-shadow: 0 0 0 3px var(--accent-glow);
}
.fc-node-icon {
  font-size: 1.1rem;
  width: 28px;
  height: 28px;
  border-radius: 6px;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  font-weight: 700;
}
.fc-node-title { font-weight: 600; font-size: 0.9rem; }
.fc-node-sub { font-size: 0.78rem; color: var(--text-muted); margin-top: 0.2rem; }

/* Node types */
.fc-start { border-color: var(--accent); background: rgba(26,80,118,0.3); }
.fc-start .fc-node-icon { background: var(--accent); color: #fff; }
.fc-decision { border-color: #6f42c1; background: rgba(111,66,193,0.1); }
.fc-decision .fc-node-icon { background: #6f42c1; color: #fff; }
.fc-process { border-color: var(--accent-light); }
.fc-process .fc-node-icon { background: var(--accent-light); color: #fff; }
.fc-action { border-color: var(--success); background: rgba(35,134,54,0.1); }
.fc-action .fc-node-icon { background: var(--success); color: #fff; }
.fc-input { border-color: #0d6efd; }
.fc-input .fc-node-icon { background: #0d6efd; color: #fff; }

/* Arrows */
.fc-arrow { font-size: 1.2rem; color: var(--text-muted); text-align: center; padding: 0.15rem 0; }

/* Branches */
.fc-branch { width: 100%; display: flex; flex-direction: column; align-items: center; }

/* Side-by-side YES/NO branch pair */
.fc-branch-pair {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.5rem;
  width: 100%;
  align-items: stretch;
}
.fc-branch-pair .fc-branch {
  width: 100%;
  align-items: stretch;
}
.fc-branch-pair .fc-branch-label {
  text-align: center;
}
.fc-branch-pair .fc-branch .fc-arrow { text-align: center; }
.fc-branch-pair .fc-branch .fc-node {
  min-width: unset;
  max-width: unset;
  width: 100%;
}

.fc-branch-label {
  font-size: 0.7rem;
  font-weight: 700;
  letter-spacing: 0.05em;
  padding: 0.15rem 0.5rem;
  border-radius: 999px;
  margin: 0.15rem 0;
}
.fc-yes { background: rgba(35,134,54,0.25); color: #4ade80; border: 1px solid rgba(35,134,54,0.5); }
.fc-no { background: rgba(218,54,51,0.2); color: #f87171; border: 1px solid rgba(218,54,51,0.4); }

/* Stratification box */
.fc-strat-box {
  background: rgba(255,255,255,0.03);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 0.75rem;
  width: 100%;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}
.fc-strat-row {
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  gap: 0.5rem;
  align-items: center;
}
.fc-strat-label {
  font-size: 0.65rem;
  font-weight: 700;
  color: var(--warning);
  text-align: center;
  letter-spacing: 0.04em;
  padding: 0.2rem 0.4rem;
  background: rgba(210,153,34,0.1);
  border: 1px solid rgba(210,153,34,0.25);
  border-radius: 4px;
  white-space: nowrap;
}
.fc-node.fc-strat { min-width: unset; max-width: unset; flex: 1; }

/* AS Protocol grid */
.fc-as-protocol {
  background: rgba(255,255,255,0.04);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 0.75rem;
  width: 100%;
}
.fc-protocol-title {
  font-size: 0.8rem;
  font-weight: 700;
  color: var(--accent-light);
  margin-bottom: 0.5rem;
}
.fc-protocol-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.4rem;
}
.fc-protocol-item {
  background: rgba(0,0,0,0.2);
  border-radius: 6px;
  padding: 0.4rem 0.6rem;
}
.fc-protocol-label { font-size: 0.7rem; font-weight: 700; color: var(--text-muted); }
.fc-protocol-value { font-size: 0.8rem; color: var(--text); }

/* ADT grid */
.fc-adt-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.5rem;
  width: 100%;
}
.fc-adt-item {
  background: rgba(0,0,0,0.2);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 0.6rem;
  text-align: center;
}
.fc-adt-icon { font-size: 1.2rem; margin-bottom: 0.2rem; }
.fc-adt-label { font-size: 0.7rem; font-weight: 700; color: var(--text-muted); }
.fc-adt-value { font-size: 0.78rem; color: var(--text); margin-top: 0.2rem; }

/* Tabs */
.fc-tabs {
  display: flex;
  gap: 0.5rem;
  margin-bottom: 1rem;
}
.fc-tab {
  flex: 1;
  padding: 0.6rem;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  color: var(--text-muted);
  font-size: 0.85rem;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.15s;
}
.fc-tab.fc-tab-active {
  background: var(--accent);
  border-color: var(--accent);
  color: #fff;
}
.fc-panel { width: 100%; display: flex; flex-direction: column; align-items: center; gap: 0; }
.fc-panel-hidden { display: none; }

/* Legend */
.fc-legend {
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
  justify-content: center;
  margin-top: 1rem;
  padding-top: 0.75rem;
  border-top: 1px solid var(--border);
}
.fc-legend-item {
  display: flex;
  align-items: center;
  gap: 0.4rem;
  font-size: 0.78rem;
  color: var(--text-muted);
}
.fc-legend-dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  display: inline-block;
}

/* Reference footer */
.fc-ref {
  font-size: 0.72rem;
  color: var(--text-muted);
  margin-top: 0.75rem;
  padding: 0.6rem;
  background: rgba(0,0,0,0.2);
  border-radius: 8px;
  line-height: 1.5;
}

/* Flowcharts grid */
.flowcharts-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 1rem;
  padding: 0;
}
.fc-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.25rem;
  cursor: pointer;
  transition: border-color 0.15s, transform 0.15s;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}
.fc-card:hover {
  border-color: var(--accent-light);
  transform: translateY(-2px);
}
.fc-card-icon { font-size: 2rem; }
.fc-card-title { font-weight: 700; font-size: 1rem; }
.fc-card-sub { font-size: 0.8rem; color: var(--text-muted); }
.fc-card-badge {
  display: inline-block;
  background: rgba(41,128,185,0.15);
  color: var(--accent-light);
  font-size: 0.65rem;
  font-weight: 700;
  letter-spacing: 0.05em;
  padding: 0.15rem 0.5rem;
  border-radius: 999px;
  margin-top: auto;
}