:root{
  --bg: #14171c;
  --bg-deep: #0f1216;
  --surface: #1c2027;
  --surface-hi: #242a33;
  --line: rgba(255,255,255,0.08);
  --line-strong: rgba(255,255,255,0.14);
  --text: #edeff1;
  --text-mut: #8b93a1;
  --text-dim: #5b6270;
  --sage: #7fa37a;
  --sage-soft: rgba(127,163,122,0.14);
  --sage-line: rgba(127,163,122,0.4);
  --gold: #ffc400;
  --gold-soft: rgba(201,162,39,0.13);
  --gold-line: rgba(201,162,39,0.45);
  --coral: #b46a5c;
  --coral-soft: rgba(180,106,92,0.14);
  --radius: 14px;
  --radius-sm: 9px;
  --serif: 'Fraunces', serif;
  --sans: 'Inter', sans-serif;
  --mono: 'IBM Plex Mono', monospace;
}
*{ box-sizing:border-box; }
html,body{ height:100%; }
body{
  margin:0;
  background: radial-gradient(1200px 800px at 15% -10%, #1a1f26 0%, var(--bg) 55%);
  color: var(--text);
  font-family: var(--sans);
  -webkit-font-smoothing:antialiased;
  display:flex;
  height:100vh;
  overflow:hidden;
}
#app-shell{ height:100vh; }
::selection{ background: var(--sage-soft); color: var(--text); }
@media (prefers-reduced-motion: reduce){
  *{ animation-duration:0.001ms !important; transition-duration:0.001ms !important; }
}

/* ---------- Sidebar ---------- */
.sidebar{
  width: 250px;
  flex-shrink:0;
  background: var(--bg-deep);
  border-right: 1px solid var(--line);
  padding: 26px 18px;
  display:flex;
  flex-direction:column;
  gap: 26px;
  height:100%;
  overflow-y:auto;
}
.brand{
  display:flex;
  align-items:center;
  gap:10px;
  padding: 0 6px;
}
.brand-mark{
  width:30px;height:30px;border-radius:8px;
  background: linear-gradient(135deg, var(--sage) 0%, #4f6d4c 100%);
  display:flex;align-items:center;justify-content:center;
  font-family:var(--serif); font-weight:600; font-size:15px; color:#0f1410;
  flex-shrink:0;
}
.brand-name{ font-family:var(--serif); font-size:17px; font-weight:600; letter-spacing:0.2px; }
.brand-sub{ font-size:10px; color:var(--text-dim); text-transform:uppercase; letter-spacing:1.2px; margin-top:1px; }

.nav-level{ display:flex; flex-direction:column; gap:4px; }
.nav-level-label{
  font-size:10.5px; letter-spacing:1.4px; text-transform:uppercase;
  color: var(--text-dim); padding: 10px 10px 2px;
  font-weight:600;
}
.nav-item{
  display:flex; align-items:center; gap:10px;
  padding:9px 10px; border-radius:9px; cursor:pointer;
  color: var(--text-mut); font-size:13.5px; font-weight:500;
  border:1px solid transparent;
  user-select:none;
}
.nav-item:hover{ background: rgba(255,255,255,0.03); color:var(--text); }
.nav-item.active{
  background: var(--surface-hi);
  color: var(--text);
  border-color: var(--line-strong);
}
.nav-item .dot{
  width:6px;height:6px;border-radius:50%; background:var(--text-dim); flex-shrink:0;
}
.nav-item.active .dot{ background: var(--sage); box-shadow:0 0 0 3px var(--sage-soft); }
.nav-item .badge{
  margin-left:auto; font-family:var(--mono); font-size:9.5px; color:var(--text-dim);
  background: rgba(255,255,255,0.04); padding:2px 6px; border-radius:20px;
}

.sidebar-foot{ margin-top:auto; padding-top:14px; border-top:1px solid var(--line); }

/* ---------- Main ---------- */
.main{ flex:1; min-width:0; padding: 34px 44px 60px; height:100%; overflow-y:auto; }
.view{ display:none; animation: fadein 0.32s ease; }
.view.active{ display:block; }
@keyframes fadein{ from{opacity:0; transform:translateY(4px);} to{opacity:1; transform:none;} }

.view-head{ display:flex; align-items:flex-end; justify-content:space-between; margin-bottom: 30px; gap:20px; flex-wrap:wrap;}
.eyebrow{ font-family:var(--mono); font-size:11px; letter-spacing:1.5px; text-transform:uppercase; color: var(--sage); margin:0 0 6px; }
.view-title{ font-family:var(--serif); font-size:30px; font-weight:600; margin:0; letter-spacing:-0.2px; }
.view-desc{ color:var(--text-mut); font-size:13.5px; margin-top:6px; max-width:520px; line-height:1.5; }
.date-pill{
  font-family:var(--mono); font-size:12px; color:var(--text-mut);
  border:1px solid var(--line); padding:7px 13px; border-radius:20px; white-space:nowrap;
}

#view-study.active{ display:flex; flex-direction:column; min-height:100%; }
.study-stage{ flex:1; display:flex; flex-direction:column; align-items:center; justify-content:center; padding-bottom:16px; }

.notice-banner{
  display:flex; align-items:center; justify-content:space-between; gap:16px; flex-wrap:wrap;
  background:var(--gold-soft); border:1px solid var(--gold-line); border-radius:var(--radius-sm);
  padding:14px 18px; margin-bottom:18px; width:100%; max-width:500px;
}
.notice-banner-text{ font-size:13px; color:var(--text); line-height:1.5; flex:1 1 220px; }
.notice-banner-text strong{ color:var(--gold); }

.hero-card{
  background: linear-gradient(160deg, var(--surface) 0%, var(--surface-hi) 100%);
  border:1px solid var(--line-strong);
  border-radius: 20px;
  padding: 34px 36px 30px;
  position:relative;
  overflow:hidden;
  width:100%;
  max-width:500px;
  margin:0 auto;
}
.hero-glow{
  position:absolute; inset:-40% -20% auto auto; width:340px; height:340px;
  background: radial-gradient(circle, var(--sage-soft) 0%, transparent 70%);
  animation: breathe 7s ease-in-out infinite;
  pointer-events:none;
}
@keyframes breathe{ 0%,100%{ opacity:0.55; transform:scale(1);} 50%{ opacity:1; transform:scale(1.08);} }

.btn{
  font-family: var(--sans); font-size:13px; font-weight:600; border-radius:10px;
  padding:10px 18px; border:1px solid transparent; cursor:pointer; display:inline-flex; align-items:center; gap:7px;
}
.btn-primary{ background: var(--sage); color:#0f1410; }
.btn-primary:hover{ background:#8fb389; }
.btn-ghost{ background: transparent; border-color: var(--line-strong); color: var(--text); }
.btn-ghost:hover{ border-color: var(--sage-line); color:var(--sage); }
.btn-sm{ padding:6px 12px; font-size:12px; border-radius:8px; }
.btn-edit{ background:transparent; color:var(--text-mut); border:1px solid var(--line-strong); }
.btn-edit:hover{ color:var(--text); border-color:var(--gold-line); }
.btn-reject{ background:transparent; color:var(--text-dim); border:1px solid var(--line); }
.btn-reject:hover{ color:var(--coral); border-color: rgba(180,106,92,0.4); }
.btn:disabled{ opacity:0.45; cursor:not-allowed; }

.panel{
  background: var(--surface); border:1px solid var(--line); border-radius: var(--radius);
  padding: 20px 22px;
}
.panel-title{
  font-size:11.5px; text-transform:uppercase; letter-spacing:1.1px; color:var(--text-mut);
  font-weight:600; margin:0 0 14px; display:flex; align-items:center; justify-content:space-between;
}
.tag{
  font-size:10.5px; font-family:var(--mono); padding:2px 8px; border-radius:20px; white-space:nowrap;
}
.tag-sage{ background:var(--sage-soft); color:var(--sage); }
.tag-gold{ background:var(--gold-soft); color:var(--gold); }
.tag-neutral{ background:rgba(255,255,255,0.05); color:var(--text-dim); }

/* ---------- Stat grid / bar chart / health rows ---------- */
.stat-grid{ display:grid; grid-template-columns:repeat(4,1fr); gap:14px; margin-bottom:22px; }
@media (max-width:880px){ .stat-grid{ grid-template-columns:repeat(2,1fr);} }
.stat-card{ background:var(--surface); border:1px solid var(--line); border-radius:var(--radius-sm); padding:16px 18px; }
.stat-num{ font-family:var(--serif); font-size:26px; font-weight:600; }
.stat-label{ font-size:11.5px; color:var(--text-mut); margin-top:3px; }

.bar-chart{ display:flex; align-items:flex-end; gap:10px; height:120px; padding-top:10px; }
.bar-col{ flex:1; display:flex; flex-direction:column; align-items:center; justify-content:flex-end; height:100%; gap:6px; }
.bar-fill{ width:100%; max-width:34px; border-radius:6px 6px 2px 2px; background:linear-gradient(180deg, #9cc296, var(--sage)); min-height:3px; }
.bar-label{ font-family:var(--mono); font-size:10px; color:var(--text-dim); }

.health-row{ display:flex; justify-content:space-between; align-items:center; padding:9px 0; border-bottom:1px solid var(--line); font-size:12.5px; }
.health-row:last-child{ border-bottom:none; padding-bottom:0; }
.health-dot{ font-family:var(--mono); font-size:10.5px; padding:2px 8px; border-radius:20px; white-space:nowrap; }
.health-ok{ background:var(--sage-soft); color:var(--sage); }
.health-atencao{ background:var(--gold-soft); color:var(--gold); }
.health-risco{ background:rgba(180,106,92,0.14); color:var(--coral); }
.health-neutral{ background:rgba(255,255,255,0.05); color:var(--text-dim); }

/* ---------- Study cards grid (manage view) ---------- */
.study-grid{ display:grid; grid-template-columns:repeat(auto-fill, minmax(240px,1fr)); gap:12px; margin-top:4px; }
.study-card{ background:var(--surface-hi); border:1px solid var(--line); border-radius:var(--radius-sm); padding:16px 16px; min-width:0; }
.study-card-title{ font-family:var(--serif); font-size:16px; font-weight:600; margin-bottom:6px; overflow-wrap:anywhere; }
.study-card-meta{ font-size:12px; color:var(--text-mut); line-height:1.5; overflow-wrap:anywhere; }
.study-card-meta em{ color:var(--text-dim); font-style:italic; }
.card-metrics{
  display:flex; flex-wrap:nowrap; align-items:center; gap:8px; margin-top:10px;
  font-size:11px; color:var(--text-dim); font-family:var(--mono); min-width:0;
}
.card-metrics span{ white-space:nowrap; overflow:hidden; text-overflow:ellipsis; min-width:0; }
.card-metrics .tag{ flex:0 0 auto; }
.card-metrics span:not(.tag){ flex:1 1 auto; }
.study-card-actions{ display:flex; gap:8px; margin-top:12px; }
.study-card-actions .btn{ flex:1 1 0; justify-content:center; padding:6px 6px; font-size:11px; white-space:nowrap; overflow:hidden; text-overflow:ellipsis; }
@media (max-width:340px){
  .study-card-actions{ flex-wrap:wrap; }
  .study-card-actions .btn{ flex:1 1 100%; }
}

/* ---------- Deck cards (baralhos view) ---------- */
.deck-grid{ grid-template-columns:repeat(auto-fill, minmax(260px,1fr)); }
.deck-card{ display:flex; flex-direction:column; }
.deck-card-tags{ display:flex; gap:6px; flex-wrap:nowrap; margin:6px 0 10px; min-width:0; }
.deck-card-tags .tag{ white-space:nowrap; overflow:hidden; text-overflow:ellipsis; flex:0 1 auto; min-width:0; }
.deck-card-tags .tag:first-child{ flex:0 0 auto; max-width:50%; }
.deck-card-actions{ display:flex; gap:6px; margin-top:12px; }
.deck-card-actions .btn{ flex:1 1 0; justify-content:center; padding:6px 6px; font-size:11px; white-space:nowrap; overflow:hidden; text-overflow:ellipsis; }
@media (max-width:340px){
  .deck-card-actions{ flex-wrap:wrap; }
  .deck-card-actions .btn{ flex:1 1 100%; }
}

.capture-bar{
  display:flex; gap:10px; background:var(--surface-hi); border:1px solid var(--line-strong);
  border-radius: 12px; padding:6px 6px 6px 16px;
}
.capture-bar input{
  flex:1; background:transparent; border:none; outline:none; color:var(--text); font-size:14px; font-family:var(--sans);
}
.capture-bar input::placeholder{ color: var(--text-dim); }
.inbox-list{ display:flex; flex-direction:column; gap:8px; margin-top:10px; }
.inbox-item{
  display:flex; align-items:center; gap:12px; background:var(--surface-hi); border:1px solid var(--line);
  border-radius:9px; padding:9px 14px;
}
.inbox-text{ flex:1; font-size:13px; }
.inbox-remove{ background:transparent; border:none; color:var(--text-dim); cursor:pointer; font-size:13px; }
.inbox-remove:hover{ color:var(--coral); }

.empty-msg{ color:var(--text-dim); font-size:12.5px; padding:14px 2px; }

/* ---------- Config sections (settings view) ---------- */
.config-section{ background:var(--surface); border:1px solid var(--line); border-radius:var(--radius); padding:22px 24px; margin-bottom:16px; }
.config-section-title{ font-family:var(--serif); font-size:16px; font-weight:600; margin:0 0 3px; }
.config-section-desc{ font-size:12px; color:var(--text-mut); margin:0 0 16px; line-height:1.5; }
.config-row{ display:flex; justify-content:space-between; align-items:center; gap:16px; padding:12px 0; border-top:1px solid var(--line); flex-wrap:wrap; }
.config-section .config-row:first-of-type{ border-top:none; padding-top:0; }
.config-row-label{ font-size:13.5px; }
.config-row-desc{ font-size:11.5px; color:var(--text-dim); margin-top:2px; max-width:320px; }
.config-input{
  background:var(--surface-hi); border:1px solid var(--line-strong); border-radius:9px; padding:8px 12px;
  color:var(--text); font-family:var(--sans); font-size:13px; outline:none; min-width:200px;
}
.config-input:focus{ border-color:var(--sage-line); }

/* ---------- Login screen ---------- */
.login-shell{ height:100%; width:100%; display:flex; align-items:center; justify-content:center; padding:24px; overflow-y:auto; }
.login-card{ width:380px; max-width:100%; }
.field{ display:flex; flex-direction:column; gap:6px; margin-bottom:14px; }
.field label{ font-family:var(--mono); font-size:10.5px; text-transform:uppercase; letter-spacing:1px; color:var(--text-dim); }
.field input{
  background:var(--surface-hi); border:1px solid var(--line-strong); border-radius:9px; padding:10px 12px;
  color:var(--text); font-family:var(--sans); font-size:13.5px; outline:none;
}
.field input:focus{ border-color:var(--sage-line); }
.login-error{ color:var(--coral); font-size:12.5px; min-height:16px; margin-bottom:6px; }
.notice-link{ color:var(--sage); font-weight:600; cursor:pointer; font-size:12.5px; }
.notice-link:hover{ text-decoration:underline; }

/* ---------- Flashcard ---------- */
.flashcard-wrap{ width:100%; max-width:420px; height:230px; perspective:1400px; margin:0 auto; position:relative; z-index:1; }
.flashcard-inner{ position:relative; width:100%; height:100%; transition:transform .5s cubic-bezier(.4,.2,.2,1); transform-style:preserve-3d; }
.flashcard-inner.flipped{ transform:rotateY(180deg); }
.face{
  position:absolute; inset:0; backface-visibility:hidden; border-radius:14px; padding:26px;
  display:flex; flex-direction:column; align-items:center; justify-content:center; text-align:center;
  background:var(--surface-hi); border:1px solid var(--line-strong);
}
.face.back{ transform:rotateY(180deg); }
.word-text{ font-family:var(--serif); font-size:30px; font-weight:600; }
.card-level-hint{ font-family:var(--mono); font-size:11px; color:var(--text-dim); margin-top:10px; }
.english-text{ font-family:var(--serif); font-size:18px; margin-bottom:8px; line-height:1.35; }
.portuguese-text{ font-size:13.5px; color:var(--text-mut); }
.postmark-badge{
  position:absolute; top:14px; right:16px; width:44px;height:44px; border:2px dashed var(--sage-line);
  border-radius:50%; display:flex; align-items:center; justify-content:center;
  font-family:var(--mono); font-size:13px; font-weight:600; color:var(--sage); background:var(--sage-soft);
}
.face-sound-btn{ position:absolute; top:14px; left:16px; }
.card-controls{ display:flex; flex-wrap:wrap; gap:10px; justify-content:center; margin-top:20px; position:relative; z-index:1; }
.card-controls .btn{ flex:1 1 auto; min-width:120px; justify-content:center; }
.btn-wrong{ background:rgba(180,106,92,0.16); color:var(--coral); border:1px solid rgba(180,106,92,0.4); }
.btn-wrong:hover{ background:rgba(180,106,92,0.28); }
.btn-warn{ background:var(--gold-soft); color:var(--gold); border:1px solid var(--gold-line); }
.btn-warn:hover{ background:rgba(201,162,39,0.24); }
.btn-correct{ background:var(--sage-soft); color:var(--sage); border:1px solid var(--sage-line); }
.btn-correct:hover{ background:rgba(127,163,122,0.26); }
.btn-correct-plus{ background:var(--sage); color:#0f1410; }
.btn-correct-plus:hover{ background:#8fb389; }

/* ---------- Icon buttons / mobile nav ---------- */
.btn-icon{
  width:36px;height:36px;border-radius:9px; background:var(--surface-hi); border:1px solid var(--line-strong);
  color:var(--text-mut); font-size:16px; display:flex; align-items:center; justify-content:center; cursor:pointer;
}
.btn-icon:hover{ color:var(--text); border-color:var(--sage-line); }

.mobile-topbar{
  display:none; position:fixed; top:0; left:0; right:0; z-index:70; background:var(--bg-deep);
  border-bottom:1px solid var(--line); padding:14px 18px; align-items:center; justify-content:space-between;
}
.sidebar-backdrop{ display:none; position:fixed; inset:0; background:rgba(0,0,0,0.55); z-index:75; }
.sidebar-backdrop.active{ display:block; }

@media (max-width:880px){
  .sidebar{ display:none; }
  .main{ padding:22px; }
  .mobile-topbar{ display:flex; }
  .main{ padding-top:88px; }
  .sidebar.mobile-open{
    display:flex !important;
    position:fixed; top:0; left:0; height:100vh; width:78vw; max-width:290px; z-index:80;
    box-shadow:0 20px 60px rgba(0,0,0,0.5);
  }
  .flashcard-wrap{ height:210px; }
  .word-text{ font-size:24px; }
  .stat-grid{ grid-template-columns:1fr 1fr; }
}
@media (max-width:480px){
  .study-grid{ grid-template-columns:1fr; }
  .card-controls .btn{ min-width:100%; }
}

/* ---------- Toast / loading ---------- */
#toast{
  position:fixed; bottom:24px; left:50%; transform:translateX(-50%);
  background:var(--surface-hi); color:var(--text); border:1px solid var(--line-strong);
  padding:12px 20px; border-radius:10px; font-size:13px; z-index:120;
  opacity:0; pointer-events:none; transition:opacity .25s ease;
}
#toast.show{ opacity:1; }
#loading-overlay{
  position:fixed; inset:0; background:rgba(15,18,22,0.75);
  display:flex; flex-direction:column; gap:14px; align-items:center; justify-content:center; z-index:200;
}
.spinner{ width:36px;height:36px;border:4px solid var(--line-strong); border-top-color:var(--sage); border-radius:50%; animation:spin .8s linear infinite; }
@keyframes spin{ to{ transform:rotate(360deg); } }
.hidden{ display:none !important; }

/* ---------- Select (reuses config-input look) ---------- */
select.config-input{ cursor:pointer; }
select.config-input:disabled{ opacity:0.5; cursor:not-allowed; }

/* ---------- Modal ---------- */
.modal-backdrop{
  position:fixed; inset:0; background:rgba(0,0,0,0.6); z-index:150;
  display:flex; align-items:center; justify-content:center; padding:20px;
}
.modal-card{
  background:var(--surface); border:1px solid var(--line-strong); border-radius:var(--radius);
  padding:26px; width:420px; max-width:100%;
}
.modal-title{ font-family:var(--serif); font-size:18px; font-weight:600; margin:0 0 4px; }
.modal-desc{ font-size:12px; color:var(--text-mut); margin:0 0 18px; line-height:1.5; }
.modal-actions{ display:flex; justify-content:flex-end; gap:10px; margin-top:18px; }