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

:root {
  --color-primary:      #1565C0;
  --color-primary-light:#1976D2;
  --color-primary-bg:   #E3F2FD;
  --color-green:        #2E7D32;
  --color-green-bg:     #E8F5E9;
  --color-green-border: #A5D6A7;
  --color-amber:        #E65100;
  --color-amber-bg:     #FFF3E0;
  --color-amber-border: #FFCC80;
  --color-red:          #C62828;
  --color-red-bg:       #FFEBEE;
  --color-red-border:   #EF9A9A;
  --color-gray:         #546E7A;
  --color-gray-bg:      #ECEFF1;
  --color-gray-border:  #B0BEC5;
  --color-text:         #1A237E;
  --color-text-body:    #263238;
  --color-text-muted:   #546E7A;
  --color-bg:           #F0F4F8;
  --color-card:         #FFFFFF;
  --color-border:       #CFD8DC;
  --radius:             12px;
  --radius-sm:          8px;
  --shadow:             0 2px 8px rgba(0,0,0,.08), 0 0 0 1px rgba(0,0,0,.04);
  --shadow-hover:       0 4px 16px rgba(0,0,0,.12);
  --font-body:          'Noto Sans TC', sans-serif;
  --font-mono:          'DM Mono', monospace;
  --transition:         .18s ease;
}

html { font-size: 16px; scroll-behavior: smooth; }
body {
  font-family: var(--font-body);
  background: var(--color-bg);
  color: var(--color-text-body);
  line-height: 1.6;
  min-height: 100vh;
}

/* ── Header ── */
.header {
  background: linear-gradient(135deg, #0D47A1 0%, #1565C0 60%, #1976D2 100%);
  color: #fff;
  padding: 1.5rem 1rem;
  box-shadow: 0 2px 12px rgba(0,0,0,.2);
}
.header__inner { max-width: 900px; margin: 0 auto; display: flex; align-items: center; justify-content: space-between; gap: 1rem; }
.header__brand { display: flex; align-items: center; gap: 1rem; }
.header__formula {
  font-family: var(--font-mono); font-size: 2rem; font-weight: 500; opacity: .95;
  letter-spacing: -.02em; background: rgba(255,255,255,.12);
  padding: .25rem .75rem; border-radius: var(--radius-sm);
}
.header__title { font-size: 1.25rem; font-weight: 700; line-height: 1.2; }
.header__subtitle { font-size: .8rem; opacity: .85; margin-top: .15rem; }
.header__version { font-family: var(--font-mono); font-size: .8rem; opacity: .8; align-self: flex-start; }

/* ── Main ── */
.main { max-width: 900px; margin: 0 auto; padding: 1.25rem 1rem 3rem; }

/* ── Tabs ── */
.tabs { display: flex; gap: .5rem; margin-bottom: 1.25rem; }
.tabs__btn {
  flex: 1; display: flex; flex-direction: column; align-items: center; gap: .1rem;
  padding: .75rem .5rem; border: 1px solid var(--color-border);
  background: var(--color-card); color: var(--color-text-muted);
  border-radius: var(--radius); font-family: var(--font-body); font-size: 1rem; font-weight: 600;
  cursor: pointer; transition: var(--transition); box-shadow: var(--shadow);
}
.tabs__btn:hover { box-shadow: var(--shadow-hover); }
.tabs__btn--active {
  background: var(--color-primary); color: #fff; border-color: var(--color-primary);
}
.tabs__num {
  display: inline-flex; align-items: center; justify-content: center;
  width: 1.5rem; height: 1.5rem; border-radius: 50%;
  background: var(--color-primary-bg); color: var(--color-primary);
  font-family: var(--font-mono); font-size: .9rem; margin-bottom: .1rem;
}
.tabs__btn--active .tabs__num { background: rgba(255,255,255,.25); color: #fff; }
.tabs__hint { font-size: .7rem; font-weight: 400; opacity: .8; }

/* ── Panels ── */
.panel { display: none; }
.panel--active { display: block; animation: fade .2s ease; }
@keyframes fade { from { opacity: 0; transform: translateY(4px); } to { opacity: 1; transform: none; } }

/* ── Card ── */
.card {
  background: var(--color-card); border-radius: var(--radius);
  box-shadow: var(--shadow); padding: 1.25rem; margin-bottom: 1rem;
}
.card--result { border-top: 3px solid var(--color-primary); }
.card__title { font-size: 1.05rem; font-weight: 700; color: var(--color-text); margin-bottom: 1rem; display: flex; align-items: center; gap: .5rem; }
.card__step {
  display: inline-block; background: var(--color-primary-bg); color: var(--color-primary);
  font-size: .75rem; font-weight: 600; padding: .15rem .5rem; border-radius: var(--radius-sm);
}
.subhead { font-size: .9rem; font-weight: 600; color: var(--color-text); margin: 1.1rem 0 .6rem; }
.subhead b { color: var(--color-primary); }

/* ── Form ── */
.form-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: .85rem; }
.field { display: flex; flex-direction: column; gap: .3rem; }
.field--full { grid-column: 1 / -1; }
.field__label { font-size: .85rem; font-weight: 600; color: var(--color-text-body); }
.field__unit { font-size: .75rem; color: var(--color-text-muted); font-weight: 400; }
.field__input {
  font-family: var(--font-mono); font-size: 1.05rem; padding: .55rem .7rem;
  border: 1px solid var(--color-border); border-radius: var(--radius-sm);
  background: #fff; color: var(--color-text-body); transition: var(--transition); width: 100%;
}
.field__input:focus { outline: none; border-color: var(--color-primary); box-shadow: 0 0 0 3px var(--color-primary-bg); }
.field__input.field__input--error { border-color: var(--color-red); box-shadow: 0 0 0 3px var(--color-red-bg); }

/* Segmented / checkbox */
.segmented { display: flex; gap: .4rem; }
.segmented__opt {
  flex: 1; position: relative; display: flex; align-items: center; justify-content: center; gap: .4rem;
  padding: .5rem; border: 1px solid var(--color-border); border-radius: var(--radius-sm);
  cursor: pointer; font-size: .95rem; transition: var(--transition); background: #fff;
}
.segmented__opt input { position: absolute; opacity: 0; }
.segmented__opt input:checked + span { color: var(--color-primary); font-weight: 700; }
.segmented__opt:has(input:checked) { border-color: var(--color-primary); background: var(--color-primary-bg); }
.segmented__opt--check { justify-content: flex-start; }

/* 滑桿（目標 AUC）*/
.slider { -webkit-appearance: none; appearance: none; width: 100%; height: 6px; border-radius: 999px;
  background: linear-gradient(90deg, var(--color-amber) 0%, var(--color-green) 50%, var(--color-red) 100%);
  outline: none; margin-top: .2rem; }
.slider::-webkit-slider-thumb { -webkit-appearance: none; appearance: none; width: 22px; height: 22px; border-radius: 50%;
  background: #fff; border: 3px solid var(--color-primary); cursor: pointer; box-shadow: var(--shadow); }
.slider::-moz-range-thumb { width: 22px; height: 22px; border-radius: 50%; background: #fff;
  border: 3px solid var(--color-primary); cursor: pointer; }
.slider__val { font-family: var(--font-mono); font-size: 1rem; font-weight: 600; color: var(--color-primary); }
.slider__scale { display: flex; justify-content: space-between; font-family: var(--font-mono); font-size: .7rem; color: var(--color-text-muted); margin-top: .2rem; }

/* ── Button ── */
.btn {
  display: inline-block; width: 100%; margin-top: 1.1rem; padding: .8rem 1rem;
  border: none; border-radius: var(--radius-sm); font-family: var(--font-body);
  font-size: 1.05rem; font-weight: 700; cursor: pointer; transition: var(--transition);
}
.btn--primary { background: var(--color-primary); color: #fff; box-shadow: var(--shadow); }
.btn--primary:hover { background: var(--color-primary-light); box-shadow: var(--shadow-hover); }
.btn--primary:active { transform: translateY(1px); }

/* ── Results ── */
.result-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(130px, 1fr)); gap: .7rem; }
.metric {
  background: var(--color-gray-bg); border-radius: var(--radius-sm); padding: .7rem .8rem;
  border: 1px solid var(--color-border);
}
.metric__label { font-size: .75rem; color: var(--color-text-muted); font-weight: 600; }
.metric__value { font-family: var(--font-mono); font-size: 1.35rem; font-weight: 500; color: var(--color-text); margin-top: .1rem; }
.metric__unit { font-size: .8rem; color: var(--color-text-muted); font-weight: 400; margin-left: .15rem; }
.metric--primary { background: var(--color-primary-bg); border-color: var(--color-primary-light); }
.metric--primary .metric__value { color: var(--color-primary); }

/* AUC hero */
.auc-hero {
  display: flex; align-items: baseline; gap: 1rem; flex-wrap: wrap;
  padding: 1rem 1.2rem; border-radius: var(--radius); margin-bottom: 1rem;
  border: 2px solid; font-family: var(--font-mono);
}
.auc-hero--ok    { background: var(--color-green-bg); border-color: var(--color-green-border); color: var(--color-green); }
.auc-hero--low   { background: var(--color-amber-bg); border-color: var(--color-amber-border); color: var(--color-amber); }
.auc-hero--high  { background: var(--color-red-bg); border-color: var(--color-red-border); color: var(--color-red); }
.auc-hero__num { font-size: 2.4rem; font-weight: 500; line-height: 1; }
.auc-hero__label { font-size: .9rem; font-weight: 600; }
.auc-hero__tag { margin-left: auto; font-family: var(--font-body); font-weight: 700; padding: .25rem .7rem; border-radius: 999px; background: rgba(255,255,255,.6); font-size: .85rem; }

/* Dose table */
.table-scroll { overflow-x: auto; }
.dose-table { width: 100%; border-collapse: collapse; font-size: .9rem; }
.dose-table th, .dose-table td { padding: .55rem .7rem; text-align: center; border-bottom: 1px solid var(--color-border); }
.dose-table th { background: var(--color-gray-bg); font-size: .8rem; color: var(--color-text-muted); font-weight: 600; }
.dose-table td { font-family: var(--font-mono); }
.dose-table tr.is-recommended td { background: var(--color-green-bg); font-weight: 600; }
.dose-table tr.is-recommended td:first-child::before { content: "★ "; color: var(--color-green); }

/* ── Warnings ── */
.warnings { margin-top: 1rem; display: flex; flex-direction: column; gap: .5rem; }
.alert {
  padding: .6rem .85rem; border-radius: var(--radius-sm); font-size: .88rem;
  border: 1px solid; display: flex; gap: .5rem; align-items: flex-start;
}
.alert--warn { background: var(--color-amber-bg); border-color: var(--color-amber-border); color: var(--color-amber); }
.alert--info { background: var(--color-primary-bg); border-color: var(--color-primary-light); color: var(--color-primary); }
.alert--error { background: var(--color-red-bg); border-color: var(--color-red-border); color: var(--color-red); }

/* 自訂方案試算 */
.sim { background: var(--color-gray-bg); border: 1px solid var(--color-border); border-radius: var(--radius-sm); padding: .85rem; }
.sim__row { display: flex; gap: .7rem; align-items: flex-end; flex-wrap: wrap; }
.sim__row .field { flex: 1; min-width: 110px; }
.sim__row .field__input { background: #fff; }
.btn--sim {
  width: auto; margin: 0; padding: .55rem 1.4rem; font-size: 1rem;
  background: var(--color-primary); color: #fff; box-shadow: var(--shadow);
  height: fit-content;
}
.btn--sim:hover { background: var(--color-primary-light); }
/* Mode 3 動態濃度列 */
.levels__row { grid-template-columns: 1fr 1fr auto; align-items: end; margin-bottom: .6rem; }
.levels__del { align-self: end; padding: .55rem 1rem; font-size: .9rem; background: var(--color-amber, #b26a00); }
.levels__del:hover { filter: brightness(1.1); }
#b-add { margin-bottom: .4rem; }
@media (max-width: 560px) { .levels__row { grid-template-columns: 1fr 1fr; } .levels__del { grid-column: 1 / -1; } }
.sim__out { margin-top: .8rem; }
.sim__out:empty { display: none; }
.sim-result { display: grid; grid-template-columns: repeat(auto-fit, minmax(110px, 1fr)); gap: .6rem; margin-bottom: .6rem; }
.sim-badge {
  display: inline-flex; align-items: center; gap: .4rem; padding: .4rem .8rem;
  border-radius: 999px; font-weight: 700; font-size: .9rem; border: 1px solid;
}
.sim-badge--ok   { background: var(--color-green-bg); border-color: var(--color-green-border); color: var(--color-green); }
.sim-badge--low  { background: var(--color-amber-bg); border-color: var(--color-amber-border); color: var(--color-amber); }
.sim-badge--high { background: var(--color-red-bg); border-color: var(--color-red-border); color: var(--color-red); }

/* Plan / recommendation（可複製）*/
.plan { margin-top: 1.1rem; border: 1px solid var(--color-primary-light); border-radius: var(--radius-sm); overflow: hidden; }
.plan__head {
  display: flex; align-items: center; justify-content: space-between;
  background: var(--color-primary-bg); color: var(--color-primary);
  padding: .5rem .8rem; font-size: .85rem; font-weight: 700;
}
.plan__copy {
  border: 1px solid var(--color-primary); background: #fff; color: var(--color-primary);
  font-family: var(--font-body); font-size: .8rem; font-weight: 600;
  padding: .3rem .8rem; border-radius: var(--radius-sm); cursor: pointer; transition: var(--transition);
}
.plan__copy:hover { background: var(--color-primary); color: #fff; }
.plan__copy.is-copied { background: var(--color-green); border-color: var(--color-green); color: #fff; }
.plan__body {
  margin: 0; padding: .85rem; font-family: var(--font-mono); font-size: .82rem; line-height: 1.65;
  color: var(--color-text-body); background: #fff; white-space: pre-wrap; word-break: break-word;
}
/* 評估 Assessment：與 Plan 區分（slate 色調，SOAP 的 A）*/
.plan--assess { border-color: #cbd5e1; }
.plan--assess .plan__head { background: #eef2f7; color: #334155; }
.plan--assess .plan__copy { border-color: #64748b; color: #334155; }
.plan--assess .plan__copy:hover { background: #334155; color: #fff; }

/* Formula */
.formula { margin-top: 1rem; }
.formula summary { cursor: pointer; font-size: .85rem; color: var(--color-primary); font-weight: 600; }
.formula__body { margin-top: .6rem; font-family: var(--font-mono); font-size: .82rem; line-height: 1.7; color: var(--color-text-body); background: var(--color-gray-bg); padding: .8rem; border-radius: var(--radius-sm); overflow-x: auto; white-space: pre-wrap; }

/* Hint */
.hint { font-size: .8rem; margin-top: .5rem; }
.hint--muted { color: var(--color-text-muted); }

/* ── Disclaimer ── */
.disclaimer { margin-top: 1.5rem; font-size: .78rem; color: var(--color-text-muted); line-height: 1.6; }
.disclaimer b { color: var(--color-amber); }
.disclaimer__src { margin-top: .4rem; font-family: var(--font-mono); font-size: .72rem; opacity: .8; }

/* ── 臨床聲明（Mode 3）── */
.declare { margin: .75rem 0 0; border: 1px solid var(--color-border); border-radius: var(--radius); background: var(--color-card); }
.declare__summary { cursor: pointer; padding: .6rem .75rem; font-weight: 600; font-size: .9rem; color: var(--color-text-muted); }
.declare[open] .declare__summary { color: var(--color-text); }
.declare .hint { margin: 0 .75rem; }
.declare__grid { display: grid; gap: .4rem; padding: .5rem .75rem .75rem; }

/* ── 資料信心 badge ── */
.confidence { margin: .75rem 0 0; }
.confidence:empty { display: none; }
.confidence__badge { display: inline-flex; align-items: center; gap: .4rem; padding: .35rem .7rem; border-radius: 999px; font-size: .85rem; font-weight: 600; border: 1px solid; }
.confidence__badge--high { color: var(--color-green); background: var(--color-green-bg); border-color: var(--color-green-border); }
.confidence__badge--moderate { color: var(--color-amber); background: var(--color-amber-bg); border-color: var(--color-amber-border); }
.confidence__badge--low { color: var(--color-red); background: var(--color-red-bg); border-color: var(--color-red-border); }
.confidence__note { display: block; margin-top: .35rem; font-size: .8rem; color: var(--color-text-muted); }

/* ── Responsive ── */
@media (max-width: 560px) {
  .form-grid { grid-template-columns: 1fr; }
  .header__title { font-size: 1.05rem; }
  .header__formula { font-size: 1.5rem; }
  .tabs__btn { font-size: .9rem; }
}