/* ═══════════════════════════════════════════════════════ */
/*  Design Tokens                                         */
/* ═══════════════════════════════════════════════════════ */
:root {
  --bg-deep:      #080c15;
  --bg-surface:   #0f1520;
  --bg-card:      #151d2e;
  --bg-card-alt:  #1a2438;
  --bg-hover:     #1f2d45;
  --bg-input:     #0c1119;
  --border:       rgba(255,255,255,0.06);
  --border-lit:   rgba(255,255,255,0.10);
  --border-focus: rgba(244,63,94,0.5);

  --text:         #e8ecf4;
  --text-dim:     #8b97b0;
  --text-muted:   #5a667d;

  --rose:         #f43f5e;
  --rose-glow:    rgba(244,63,94,0.3);
  --rose-light:   #fb7185;
  --rose-dark:    #be123c;

  --green:        #34d399;
  --green-bg:     rgba(52,211,153,0.1);
  --yellow:       #fbbf24;
  --yellow-bg:    rgba(251,191,36,0.1);
  --orange:       #f97316;
  --orange-bg:    rgba(249,115,22,0.1);
  --red:          #f87171;
  --red-bg:       rgba(248,113,113,0.1);
  --blue:         #60a5fa;
  --purple:       #a78bfa;

  --radius:       16px;
  --radius-sm:    10px;
  --radius-xs:    8px;
  --shadow-lg:    0 20px 50px rgba(0,0,0,0.5);
  --shadow-md:    0 8px 30px rgba(0,0,0,0.35);
}

/* ═══════════════════════════════════════════════════════ */
/*  Reset & Base                                          */
/* ═══════════════════════════════════════════════════════ */
*, *::before, *::after { margin: 0; padding: 0; box-sizing: border-box; }

html {
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  font-family: 'Inter', system-ui, -apple-system, sans-serif;
  background: var(--bg-deep);
  color: var(--text);
  min-height: 100vh;
}

.hidden { display: none !important; }

/* ═══════════════════════════════════════════════════════ */
/*  PASSWORD GATE SCREEN (Anonymous Access)               */
/* ═══════════════════════════════════════════════════════ */
.password-screen {
  position: fixed;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--bg-deep);
  z-index: 1000;
  transition: opacity 0.5s ease, visibility 0.5s ease;
}

.password-screen.fade-out {
  opacity: 0;
  visibility: hidden;
}

.pw-bg-orbs {
  position: absolute;
  inset: 0;
  overflow: hidden;
  pointer-events: none;
}

.pw-orb {
  position: absolute;
  border-radius: 50%;
  filter: blur(100px);
  opacity: 0.15;
  animation: float-orb 20s ease-in-out infinite;
}

.pw-orb-1 {
  width: 500px; height: 500px;
  background: var(--rose);
  top: -10%; left: -5%;
}

.pw-orb-2 {
  width: 400px; height: 400px;
  background: #3b82f6;
  bottom: -10%; right: -5%;
  animation-delay: -10s;
}

@keyframes float-orb {
  0%, 100% { transform: translate(0, 0) scale(1); }
  50%      { transform: translate(30px, -30px) scale(1.05); }
}

.pw-card {
  position: relative;
  width: 100%;
  max-width: 420px;
  background: rgba(21, 29, 46, 0.85);
  backdrop-filter: blur(24px);
  -webkit-backdrop-filter: blur(24px);
  border: 1px solid var(--border-lit);
  border-radius: 20px;
  padding: 40px 36px 32px;
  box-shadow: var(--shadow-lg), 0 0 40px var(--rose-glow);
  text-align: center;
  margin: 16px;
  animation: card-appear 0.6s cubic-bezier(0.16, 1, 0.3, 1) both;
}

@keyframes card-appear {
  from { opacity: 0; transform: translateY(24px) scale(0.96); }
  to   { opacity: 1; transform: translateY(0) scale(1); }
}

.pw-logo {
  margin-bottom: 16px;
  display: inline-block;
  animation: pulse-rose 3s ease-in-out infinite;
}

@keyframes pulse-rose {
  0%, 100% { filter: drop-shadow(0 0 10px var(--rose-glow)); }
  50%      { filter: drop-shadow(0 0 24px var(--rose-glow)); }
}

.pw-title {
  font-size: 1.5rem;
  font-weight: 700;
  background: linear-gradient(135deg, #fff 0%, #cbd5e1 100%);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  margin-bottom: 6px;
}

.pw-subtitle {
  font-size: 0.88rem;
  color: var(--text-dim);
  line-height: 1.5;
  margin-bottom: 20px;
}

.pw-anon-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: rgba(52, 211, 153, 0.1);
  border: 1px solid rgba(52, 211, 153, 0.25);
  color: var(--green);
  font-size: 0.75rem;
  font-weight: 600;
  padding: 6px 12px;
  border-radius: 100px;
  margin-bottom: 24px;
}

.pw-input-wrapper {
  position: relative;
  margin-bottom: 14px;
}

.pw-input-icon {
  position: absolute;
  left: 14px;
  top: 50%;
  transform: translateY(-50%);
  color: var(--text-muted);
  pointer-events: none;
}

.pw-input-wrapper input {
  width: 100%;
  background: var(--bg-input);
  border: 1px solid var(--border-lit);
  border-radius: var(--radius-xs);
  padding: 14px 14px 14px 42px;
  font-family: inherit;
  font-size: 0.95rem;
  color: var(--text);
  outline: none;
  transition: border-color 0.25s, box-shadow 0.25s;
}

.pw-input-wrapper input::placeholder { color: var(--text-muted); }
.pw-input-wrapper input:focus {
  border-color: var(--rose);
  box-shadow: 0 0 0 3px var(--rose-glow);
}

.pw-error {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  color: var(--red);
  font-size: 0.8rem;
  font-weight: 500;
  margin-bottom: 14px;
  animation: shake 0.35s ease;
}

.pw-btn {
  width: 100%;
  border: none;
  background: linear-gradient(135deg, #f43f5e 0%, #e11d48 100%);
  color: #fff;
  font-family: inherit;
  font-size: 0.92rem;
  font-weight: 600;
  padding: 14px;
  border-radius: var(--radius-xs);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  transition: transform 0.15s, box-shadow 0.25s;
}

.pw-btn:hover {
  transform: translateY(-1px);
  box-shadow: 0 6px 20px var(--rose-glow);
}

.pw-btn:active { transform: translateY(0); }

.pw-btn.loading .pw-btn-text { opacity: 0; }

.pw-btn-loader {
  display: none;
  width: 18px; height: 18px;
  border: 2px solid rgba(255,255,255,0.3);
  border-top-color: #fff;
  border-radius: 50%;
  animation: spin 0.6s linear infinite;
  position: absolute;
}

.pw-btn.loading .pw-btn-loader { display: block; }

@keyframes spin { to { transform: rotate(360deg); } }

.pw-footer {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  margin-top: 24px;
  font-size: 0.75rem;
  color: var(--text-muted);
}

/* ═══════════════════════════════════════════════════════ */
/*  Top Bar                                               */
/* ═══════════════════════════════════════════════════════ */
.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 12px 28px;
  background: rgba(15,21,32,0.85);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--border);
  position: sticky;
  top: 0;
  z-index: 100;
}

.topbar-left { display: flex; align-items: center; gap: 12px; }

.logo-icon {
  width: 40px; height: 40px;
  background: rgba(244,63,94,0.1);
  border-radius: 10px;
  display: flex; align-items: center; justify-content: center;
  border: 1px solid rgba(244,63,94,0.2);
}

.topbar-text { display: flex; flex-direction: column; }

.topbar-title {
  font-size: 1.05rem;
  font-weight: 700;
  background: linear-gradient(135deg, #fff, #a0aec0);
  -webkit-background-clip: text; background-clip: text;
  -webkit-text-fill-color: transparent;
}

.topbar-subtitle {
  font-size: 0.72rem;
  color: var(--text-muted);
  letter-spacing: 0.3px;
}

.badge {
  display: flex; align-items: center; gap: 5px;
  padding: 6px 12px;
  border-radius: 100px;
  font-size: 0.72rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.badge-info {
  background: rgba(251,191,36,0.1);
  color: var(--yellow);
  border: 1px solid rgba(251,191,36,0.2);
}

/* ═══════════════════════════════════════════════════════ */
/*  Main Layout                                           */
/* ═══════════════════════════════════════════════════════ */
.main {
  max-width: 880px;
  margin: 0 auto;
  padding: 28px 20px 60px;
  display: flex;
  flex-direction: column;
  gap: 24px;
}

/* ═══════════════════════════════════════════════════════ */
/*  Panel                                                 */
/* ═══════════════════════════════════════════════════════ */
.panel {
  background: var(--bg-card);
  border: 1px solid var(--border-lit);
  border-radius: var(--radius);
  box-shadow: var(--shadow-md);
  overflow: hidden;
  animation: panel-in 0.4s ease both;
}

@keyframes panel-in {
  from { opacity: 0; transform: translateY(16px); }
  to   { opacity: 1; transform: translateY(0); }
}

.panel-header {
  padding: 18px 24px;
  border-bottom: 1px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 12px;
}

.panel-title {
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--text-dim);
  display: flex;
  align-items: center;
  gap: 8px;
}

.panel-title svg { color: var(--rose-light); flex-shrink: 0; }

/* ═══════════════════════════════════════════════════════ */
/*  Input Panel                                           */
/* ═══════════════════════════════════════════════════════ */
.input-panel form {
  padding: 24px;
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.fields-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
}

.field-group {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.field-label {
  font-size: 0.85rem;
  font-weight: 500;
  color: var(--text-dim);
}

.field-unit {
  font-weight: 400;
  color: var(--text-muted);
  font-size: 0.78rem;
}

.field-input {
  background: var(--bg-input);
  border: 1px solid var(--border-lit);
  border-radius: var(--radius-xs);
  padding: 13px 16px;
  font-family: inherit;
  font-size: 1rem;
  font-weight: 500;
  color: var(--text);
  outline: none;
  transition: border-color 0.25s, box-shadow 0.25s;
  width: 100%;
}

.field-input::placeholder { color: var(--text-muted); }
.field-input:focus {
  border-color: var(--rose);
  box-shadow: 0 0 0 3px var(--rose-glow);
}

/* Remove number spinners */
.field-input[type="number"]::-webkit-inner-spin-button,
.field-input[type="number"]::-webkit-outer-spin-button {
  -webkit-appearance: none; margin: 0;
}
.field-input[type="number"] { -moz-appearance: textfield; }

/* Sex toggle */
.sex-toggle {
  display: flex;
  gap: 4px;
  background: var(--bg-input);
  border-radius: var(--radius-xs);
  padding: 4px;
  border: 1px solid var(--border-lit);
}

.sex-btn {
  flex: 1;
  border: none;
  background: transparent;
  color: var(--text-muted);
  font-family: inherit;
  font-size: 0.88rem;
  font-weight: 500;
  padding: 11px 0;
  border-radius: 6px;
  cursor: pointer;
  display: flex; align-items: center; justify-content: center; gap: 6px;
  transition: all 0.25s;
}

.sex-btn:hover { color: var(--text-dim); }

.sex-btn.active {
  background: var(--bg-hover);
  color: var(--text);
  box-shadow: 0 2px 8px rgba(0,0,0,0.3);
}

.sex-btn.active[data-sex="male"]   { color: var(--blue); }
.sex-btn.active[data-sex="female"] { color: var(--rose-light); }

/* Age slider */
.input-row {
  display: flex;
  align-items: center;
  gap: 14px;
}

.age-slider {
  flex: 1;
  -webkit-appearance: none;
  appearance: none;
  height: 6px;
  background: var(--bg-hover);
  border-radius: 3px;
  outline: none;
}

.age-slider::-webkit-slider-thumb {
  -webkit-appearance: none;
  width: 22px; height: 22px;
  border-radius: 50%;
  background: var(--rose);
  cursor: pointer;
  box-shadow: 0 2px 8px var(--rose-glow);
  border: 2px solid rgba(255,255,255,0.2);
  transition: transform 0.15s;
}

.age-slider::-webkit-slider-thumb:hover { transform: scale(1.15); }

.age-input {
  width: 80px;
  text-align: center;
  flex-shrink: 0;
}

/* Calculate button */
.calc-btn {
  width: 100%;
  border: none;
  background: linear-gradient(135deg, #f43f5e 0%, #e11d48 100%);
  color: #fff;
  font-family: inherit;
  font-size: 0.95rem;
  font-weight: 600;
  padding: 15px;
  border-radius: var(--radius-xs);
  cursor: pointer;
  display: flex; align-items: center; justify-content: center; gap: 8px;
  transition: transform 0.15s, box-shadow 0.25s;
  margin-top: 4px;
}

.calc-btn:hover {
  transform: translateY(-1px);
  box-shadow: 0 8px 24px var(--rose-glow);
}

.calc-btn:active { transform: translateY(0); }

/* ═══════════════════════════════════════════════════════ */
/*  Inline Results Container                              */
/* ═══════════════════════════════════════════════════════ */
.results-container {
  border-top: 1px solid var(--border-lit);
  background: var(--bg-surface);
  animation: panel-in 0.35s ease both;
}

.results-header {
  padding: 14px 20px;
  border-bottom: 1px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.results-title {
  font-size: 0.88rem;
  font-weight: 600;
  color: var(--text-dim);
  display: flex;
  align-items: center;
  gap: 6px;
}

.results-title svg {
  color: var(--rose);
}

.result-patient-info {
  font-size: 0.8rem;
  color: var(--rose-light);
  font-weight: 600;
}

.result-cards {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1px;
  background: var(--border);
}

.result-card {
  padding: 20px;
  background: var(--bg-card);
}

.result-card-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 16px;
  flex-wrap: wrap;
  gap: 6px;
}

.result-metric-label {
  font-size: 0.82rem;
  font-weight: 600;
  color: var(--text-dim);
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.result-value-badge {
  font-size: 0.78rem;
  font-weight: 600;
  padding: 4px 10px;
  border-radius: 100px;
  background: var(--bg-hover);
  color: var(--text-dim);
  border: 1px solid var(--border);
}

/* Percentile Ring */
.result-percentile-display {
  display: flex;
  align-items: center;
  gap: 16px;
}

.percentile-ring {
  position: relative;
  width: 96px; height: 96px;
  flex-shrink: 0;
}

.ring-svg { width: 100%; height: 100%; transform: rotate(-90deg); }

.ring-bg {
  fill: none;
  stroke: var(--bg-hover);
  stroke-width: 8;
}

.ring-fill {
  fill: none;
  stroke: var(--green);
  stroke-width: 8;
  stroke-linecap: round;
  transition: stroke-dashoffset 1s ease, stroke 0.5s ease;
}

.ring-label {
  position: absolute;
  inset: 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
}

.ring-value {
  font-size: 1.5rem;
  font-weight: 700;
  line-height: 1;
}

.ring-unit {
  font-size: 0.62rem;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.5px;
  margin-top: 2px;
}

.percentile-detail {
  font-size: 0.82rem;
  color: var(--text-dim);
  line-height: 1.45;
}

.percentile-detail .highlight {
  font-weight: 700;
  font-size: 0.92rem;
}

/* Percentile color zones */
.zone-low    .ring-fill { stroke: var(--green);  }
.zone-low    .ring-value { color: var(--green); }
.zone-normal .ring-fill { stroke: var(--blue);   }
.zone-normal .ring-value { color: var(--blue); }
.zone-mod    .ring-fill { stroke: var(--yellow);  }
.zone-mod    .ring-value { color: var(--yellow); }
.zone-high   .ring-fill { stroke: var(--orange);  }
.zone-high   .ring-value { color: var(--orange); }
.zone-vhigh  .ring-fill { stroke: var(--red);    }
.zone-vhigh  .ring-value { color: var(--red); }

/* ═══════════════════════════════════════════════════════ */
/*  Charts                                                */
/* ═══════════════════════════════════════════════════════ */
.chart-container {
  padding: 20px;
  overflow-x: auto;
}

.chart-container canvas {
  width: 100%;
  height: auto;
  max-height: 420px;
}

/* ═══════════════════════════════════════════════════════ */
/*  Reference Tables                                      */
/* ═══════════════════════════════════════════════════════ */
.table-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1px;
  background: var(--border);
}

.table-block {
  background: var(--bg-card);
  padding: 20px;
}

.table-subtitle {
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--text-dim);
  margin-bottom: 14px;
}

.table-scroll { overflow-x: auto; }

.ref-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.82rem;
}

.ref-table th {
  text-align: left;
  padding: 10px 12px;
  color: var(--text-muted);
  font-weight: 600;
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  border-bottom: 1px solid var(--border-lit);
  white-space: nowrap;
}

.ref-table td {
  padding: 10px 12px;
  color: var(--text-dim);
  border-bottom: 1px solid var(--border);
  white-space: nowrap;
}

.ref-table tbody tr:hover td {
  background: var(--bg-hover);
  color: var(--text);
}

.ref-table td.highlight-cell {
  color: var(--rose-light);
  font-weight: 600;
}

/* ═══════════════════════════════════════════════════════ */
/*  Disclaimer                                            */
/* ═══════════════════════════════════════════════════════ */
.disclaimer {
  display: flex;
  align-items: flex-start;
  gap: 8px;
  padding: 16px 20px;
  background: rgba(251,191,36,0.05);
  border: 1px solid rgba(251,191,36,0.15);
  border-radius: var(--radius-sm);
  font-size: 0.75rem;
  color: var(--text-muted);
  line-height: 1.5;
}

.disclaimer svg {
  color: var(--yellow);
  flex-shrink: 0;
  margin-top: 1px;
}

/* ═══════════════════════════════════════════════════════ */
/*  Responsive (Mobile Phone App View Optimization)       */
/* ═══════════════════════════════════════════════════════ */
@media (max-width: 640px) {
  .topbar { padding: 10px 14px; }
  .topbar-title { font-size: 0.9rem; }
  .topbar-subtitle { display: none; }
  .main { padding: 12px 10px 30px; gap: 14px; }

  .input-panel form { padding: 16px; gap: 14px; }

  .fields-row { gap: 10px; }
  .field-label { font-size: 0.78rem; white-space: nowrap; }
  .field-unit { font-size: 0.7rem; }
  .field-input { padding: 10px 12px; font-size: 0.92rem; }

  .sex-btn { padding: 8px 0; font-size: 0.82rem; }
  .calc-btn { padding: 12px; font-size: 0.9rem; }

  .results-header { padding: 10px 14px; }
  .results-title { font-size: 0.82rem; }

  /* Keep result cards side-by-side on mobile for single-screen fit */
  .result-cards { grid-template-columns: 1fr 1fr; }
  .result-card { padding: 12px 8px; }
  .result-metric-label { font-size: 0.72rem; }
  .result-value-badge { font-size: 0.68rem; padding: 2px 6px; }

  .result-percentile-display { flex-direction: column; gap: 6px; text-align: center; }
  .percentile-ring { width: 68px; height: 68px; }
  .ring-value { font-size: 1.2rem; }
  .ring-unit { font-size: 0.52rem; }
  .percentile-detail { font-size: 0.7rem; line-height: 1.3; }
  .percentile-detail .highlight { font-size: 0.8rem; }

  .table-grid { grid-template-columns: 1fr; }
  .chart-container canvas { min-width: 550px; }
}