/* ===========================================================
   BOLETIM — tema monocromático dirigido por --hue
   Toda a paleta (exceto cores semânticas de status) deriva
   de uma única variável de matiz (--hue), então trocar o
   tema é literalmente girar um slider.

   v2 — refino de fluidez/consistência: sistema único de
   transições, elevações e espaçamentos; estados de hover/
   active/focus em todos os elementos interativos; pequenas
   animações de entrada; suporte a prefers-reduced-motion;
   correções de detalhes (prefixos, foco visível, etc).
=========================================================== */

:root {
  --hue: 255;
  --sat: 28%;

  --bg: hsl(var(--hue) calc(var(--sat) * 0.5) 6%);
  --bg-elevated: hsl(var(--hue) calc(var(--sat) * 0.45) 9%);
  --surface: hsl(var(--hue) calc(var(--sat) * 0.4) 11%);
  --surface-2: hsl(var(--hue) calc(var(--sat) * 0.38) 15%);
  --border: hsl(var(--hue) calc(var(--sat) * 0.3) 20%);
  --border-soft: hsl(var(--hue) calc(var(--sat) * 0.3) 16%);

  --text: hsl(var(--hue) 20% 96%);
  --text-dim: hsl(var(--hue) 12% 70%);
  --text-faint: hsl(var(--hue) 10% 48%);

  --accent: hsl(var(--hue) 78% 62%);
  --accent-strong: hsl(var(--hue) 85% 70%);
  --accent-soft: hsl(var(--hue) 55% 18%);
  --accent-contrast: hsl(var(--hue) 90% 8%);

  --ok: #4ade80;
  --ok-soft: rgba(74, 222, 128, 0.14);
  --warn: #fbbf24;
  --warn-soft: rgba(251, 191, 36, 0.14);
  --danger: #fb7185;
  --danger-soft: rgba(251, 113, 133, 0.14);

  --radius-s: 10px;
  --radius-m: 16px;
  --radius-l: 22px;

  --font-display: 'Space Grotesk', 'Inter', sans-serif;
  --font-body: 'Inter', system-ui, sans-serif;
  --font-mono: 'JetBrains Mono', monospace;

  --safe-top: env(safe-area-inset-top, 0px);
  --safe-bottom: env(safe-area-inset-bottom, 0px);

  /* ---- sistema de movimento (fluidez consistente) ---- */
  --ease-out: cubic-bezier(.16, 1, .3, 1);
  --ease-in-out: cubic-bezier(.65, 0, .35, 1);
  --ease-spring: cubic-bezier(.34, 1.56, .64, 1);
  --dur-fast: .14s;
  --dur-base: .22s;
  --dur-slow: .38s;

  /* ---- sistema de elevação (sombras consistentes) ---- */
  --shadow-s: 0 2px 8px -2px rgba(0, 0, 0, .28);
  --shadow-m: 0 10px 28px -10px rgba(0, 0, 0, .38);
  --shadow-l: 0 18px 44px -16px rgba(0, 0, 0, .48);
  --shadow-accent: 0 8px 24px -10px hsl(var(--hue) 78% 45% / .55);

  --tap: scale(0.97);
}

.theme-light {
  --bg: hsl(var(--hue) 40% 97%);
  --bg-elevated: hsl(var(--hue) 45% 100%);
  --surface: hsl(var(--hue) 50% 100%);
  --surface-2: hsl(var(--hue) 35% 94%);
  --border: hsl(var(--hue) 30% 88%);
  --border-soft: hsl(var(--hue) 30% 91%);
  --text: hsl(var(--hue) 30% 12%);
  --text-dim: hsl(var(--hue) 15% 35%);
  --text-faint: hsl(var(--hue) 10% 52%);
  --accent: hsl(var(--hue) 70% 46%);
  --accent-strong: hsl(var(--hue) 75% 38%);
  --accent-soft: hsl(var(--hue) 70% 92%);
  --accent-contrast: #fff;

  --shadow-s: 0 2px 8px -2px rgba(20, 20, 30, .10);
  --shadow-m: 0 10px 28px -10px rgba(20, 20, 30, .16);
  --shadow-l: 0 18px 44px -16px rgba(20, 20, 30, .20);
  --shadow-accent: 0 8px 24px -10px hsl(var(--hue) 70% 46% / .35);
}

/* ===================== RESET / BASE ===================== */
* { box-sizing: border-box; }
html, body {
  margin: 0;
  padding: 0;
  height: 100%;
  overscroll-behavior-y: none;
  max-width: 100vw;
  overflow-x: hidden;
}
html { scroll-behavior: smooth; }
body {
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-body);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
  line-height: 1.45;
  transition: background var(--dur-slow) var(--ease-in-out), color var(--dur-slow) var(--ease-in-out);
  overflow-wrap: break-word;
  word-break: break-word;
}
h1, h2, h3, .display { font-family: var(--font-display); letter-spacing: -0.01em; }
button { font-family: var(--font-body); }
p { margin: 0 0 8px; }
.hidden { display: none !important; }
::selection { background: var(--accent); color: var(--accent-contrast); }

img, svg, canvas, video { max-width: 100%; }

/* foco visível consistente em todo elemento interativo navegável por teclado,
   sem poluir cliques de mouse/touch */
a:focus-visible,
button:focus-visible,
.icon-btn:focus-visible,
.nav-btn:focus-visible,
.chip:focus-visible,
.bimestre-tab:focus-visible,
.subject-item:focus-visible,
.preset-dot:focus-visible,
input:focus-visible,
select:focus-visible,
textarea:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}

/* qualquer coisa "clicável" ganha o mesmo feedback de toque —
   consistência tátil em todo o app */
button, .subject-item, .chip, .bimestre-tab, .preset-dot,
.chat-suggestion-chip, .nav-btn, .icon-btn {
  -webkit-tap-highlight-color: transparent;
  user-select: none;
}

input, select, textarea {
  font-family: var(--font-body);
  background: var(--surface-2);
  border: 1px solid var(--border);
  color: var(--text);
  border-radius: var(--radius-s);
  padding: 12px 14px;
  font-size: 16px; /* evita zoom automático no iOS */
  outline: none;
  width: 100%;
  min-width: 0;
  max-width: 100%;
  transition: border-color var(--dur-base) var(--ease-out),
              box-shadow var(--dur-base) var(--ease-out),
              background var(--dur-base) var(--ease-out);
}
input::placeholder, textarea::placeholder { color: var(--text-faint); opacity: 1; }
input:hover, select:hover, textarea:hover { border-color: color-mix(in srgb, var(--border) 55%, var(--accent)); }
input:focus, select:focus, textarea:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-soft);
}
input:disabled, select:disabled, textarea:disabled {
  opacity: .55;
  cursor: not-allowed;
}

/* ===================== ANIMAÇÕES BASE ===================== */
@keyframes fadeUp {
  from { opacity: 0; transform: translateY(8px); }
  to   { opacity: 1; transform: translateY(0); }
}
@keyframes fadeIn {
  from { opacity: 0; }
  to   { opacity: 1; }
}
@keyframes sheetUp {
  from { transform: translateY(100%); }
  to   { transform: translateY(0); }
}
@keyframes popIn {
  from { opacity: 0; transform: scale(.94); }
  to   { opacity: 1; transform: scale(1); }
}

/* view inteira entra suavemente ao trocar de aba */
.view { animation: fadeUp var(--dur-slow) var(--ease-out); }

/* respeita quem prefere menos movimento */
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after {
    animation-duration: .001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: .001ms !important;
    scroll-behavior: auto !important;
  }
}

/* ===================== LOGIN ===================== */
.screen-login {
  min-height: 100dvh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 24px;
  background:
    radial-gradient(circle at 20% 15%, var(--accent-soft), transparent 55%),
    var(--bg);
}
.login-card {
  width: 100%;
  max-width: 360px;
  text-align: center;
  animation: fadeUp var(--dur-slow) var(--ease-out);
}
.login-mark {
  width: 64px; height: 64px;
  margin: 0 auto 20px;
  border-radius: 18px;
  background: linear-gradient(145deg, var(--accent), var(--accent-strong));
  color: var(--accent-contrast);
  display: flex; align-items: center; justify-content: center;
  font-family: var(--font-display);
  font-weight: 700; font-size: 24px;
  box-shadow: var(--shadow-accent);
}
.login-card h1 { font-size: 28px; margin: 0 0 4px; }
.login-sub { color: var(--text-dim); margin: 0 0 28px; font-size: 14px; }
#login-form { display: flex; flex-direction: column; gap: 12px; }
#login-form input { text-align: center; letter-spacing: 4px; font-size: 20px; }
#login-form button {
  background: var(--accent);
  color: var(--accent-contrast);
  border: none;
  padding: 14px;
  border-radius: var(--radius-s);
  font-weight: 600;
  font-size: 16px;
  cursor: pointer;
  transition: transform var(--dur-fast) var(--ease-out),
              filter var(--dur-base) var(--ease-out),
              box-shadow var(--dur-base) var(--ease-out);
}
#login-form button:hover { filter: brightness(1.06); box-shadow: var(--shadow-accent); }
#login-form button:active { transform: var(--tap); filter: brightness(.96); }
.login-error {
  color: var(--danger);
  font-size: 13px;
  min-height: 18px;
  margin-top: 12px;
  opacity: 0;
  transform: translateY(-2px);
  transition: opacity var(--dur-base) var(--ease-out), transform var(--dur-base) var(--ease-out);
}
.login-error:not(:empty) { opacity: 1; transform: translateY(0); }

/* ===================== SAUDAÇÃO (dashboard) ===================== */
.greeting-row {
  display: flex; align-items: center; gap: 12px;
  margin-bottom: 16px;
  animation: fadeUp var(--dur-slow) var(--ease-out);
}
.greeting-avatar {
  width: 44px; height: 44px; border-radius: 14px; flex-shrink: 0;
  background: linear-gradient(145deg, var(--accent), var(--accent-strong));
  color: var(--accent-contrast);
  display: flex; align-items: center; justify-content: center;
  font-family: var(--font-display); font-weight: 700; font-size: 15px;
  box-shadow: var(--shadow-accent);
}
.greeting-text { min-width: 0; }
.greeting-hello { font-family: var(--font-display); font-weight: 600; font-size: 18px; line-height: 1.2; }
.greeting-sub { font-size: 12.5px; color: var(--text-faint); margin-top: 2px; }

/* pequeno indício de que esses elementos levam a algum lugar */
.hero-chip-tap, .stat-box-tap { cursor: pointer; }
.hero-chip-tap:hover { border-color: var(--accent); color: var(--text); }
.stat-box-tap:hover { border-color: color-mix(in srgb, var(--border) 40%, var(--accent)); }

.subject-area-ico { display: inline-block; }
.area-badge {
  display: inline-flex; align-items: center; justify-content: center;
  width: 20px; height: 20px; border-radius: 6px;
  font-family: var(--font-mono); font-size: 9px; font-weight: 700;
  letter-spacing: -0.02em;
  vertical-align: middle; margin-right: 1px;
  background: var(--surface-2); border: 1px solid var(--border);
}
.area-badge.area-linguagens { color: #f472b6; border-color: rgba(244,114,182,.35); background: rgba(244,114,182,.12); }
.area-badge.area-humanas { color: #60a5fa; border-color: rgba(96,165,250,.35); background: rgba(96,165,250,.12); }
.area-badge.area-natureza { color: #4ade80; border-color: rgba(74,222,128,.35); background: rgba(74,222,128,.12); }
.area-badge.area-matematica { color: #fbbf24; border-color: rgba(251,191,36,.35); background: rgba(251,191,36,.12); }
.area-badge.area-tecnica { color: #a78bfa; border-color: rgba(167,139,250,.35); background: rgba(167,139,250,.12); }

/* ===================== SKELETONS (carregamento) ===================== */
@keyframes skelPulse {
  0%, 100% { opacity: .55; }
  50% { opacity: 1; }
}
.skel {
  background: var(--surface-2);
  border: 1px solid var(--border-soft);
  border-radius: var(--radius-m);
  animation: skelPulse 1.3s ease-in-out infinite;
}
.skel-avatar { width: 44px; height: 44px; border-radius: 14px; flex-shrink: 0; }
.skel-line { height: 12px; border-radius: 6px; border: none; background: var(--surface-2); }
.skel-card { border-radius: var(--radius-l); margin-bottom: 14px; }
.skeleton-block { margin-bottom: 16px; }
@media (prefers-reduced-motion: reduce) {
  .skel { animation: none; opacity: .8; }
}

/* ===================== APP SHELL ===================== */
.app { min-height: 100dvh; display: flex; flex-direction: column; }

.topbar {
  position: sticky; top: 0; z-index: 20;
  display: flex; align-items: center; justify-content: space-between;
  padding: calc(14px + var(--safe-top)) 20px 14px;
  background: color-mix(in srgb, var(--bg) 88%, transparent);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--border-soft);
  transition: background var(--dur-slow) var(--ease-in-out), border-color var(--dur-slow) var(--ease-in-out);
}
.topbar-title { font-family: var(--font-display); font-weight: 600; font-size: 19px; }
.icon-btn {
  width: 36px; height: 36px; border-radius: 50%;
  border: 1px solid var(--border);
  background: var(--surface);
  color: var(--accent);
  cursor: pointer;
  display: flex; align-items: center; justify-content: center;
  font-size: 14px;
  transition: transform var(--dur-fast) var(--ease-out),
              background var(--dur-base) var(--ease-out),
              border-color var(--dur-base) var(--ease-out);
}
.icon-btn:hover { background: var(--surface-2); border-color: var(--accent); }
.icon-btn:active { transform: var(--tap); }

.view {
  flex: 1;
  padding: 18px 16px calc(100px + var(--safe-bottom));
  max-width: 720px;
  width: 100%;
  margin: 0 auto;
  min-width: 0;
}

.bottomnav {
  position: fixed; bottom: 0; left: 0; right: 0; z-index: 30;
  display: flex;
  background: color-mix(in srgb, var(--bg-elevated) 92%, transparent);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-top: 1px solid var(--border-soft);
  padding: 8px 6px calc(8px + var(--safe-bottom));
  transition: background var(--dur-slow) var(--ease-in-out), border-color var(--dur-slow) var(--ease-in-out);
}
.nav-btn {
  flex: 1;
  background: none; border: none;
  color: var(--text-faint);
  display: flex; flex-direction: column; align-items: center; gap: 3px;
  font-size: 11px;
  padding: 6px 2px;
  border-radius: var(--radius-s);
  cursor: pointer;
  transition: color var(--dur-base) var(--ease-out), transform var(--dur-fast) var(--ease-out);
}
.nav-btn .nav-ico {
  font-size: 18px;
  line-height: 1;
  transition: transform var(--dur-base) var(--ease-spring);
}
.nav-btn:active { transform: var(--tap); }
.nav-btn.active { color: var(--accent); }
.nav-btn.active .nav-ico { transform: translateY(-1px) scale(1.08); }

/* ===================== CARDS / SECTIONS ===================== */
.section-title {
  font-family: var(--font-display);
  font-size: 15px;
  font-weight: 600;
  color: var(--text-dim);
  text-transform: uppercase;
  letter-spacing: 0.06em;
  margin: 24px 2px 10px;
}
.section-title:first-child { margin-top: 0; }

.card {
  background: var(--surface);
  border: 1px solid var(--border-soft);
  border-radius: var(--radius-l);
  padding: 18px;
  margin-bottom: 14px;
  transition: background var(--dur-base) var(--ease-out),
              border-color var(--dur-base) var(--ease-out),
              box-shadow var(--dur-base) var(--ease-out),
              transform var(--dur-base) var(--ease-out);
}

.hero-avg {
  background: linear-gradient(160deg, var(--accent-soft), var(--surface) 70%);
  border: 1px solid var(--border-soft);
  border-radius: var(--radius-l);
  padding: 24px 20px;
  margin-bottom: 16px;
  position: relative;
  overflow: hidden;
  transition: background var(--dur-slow) var(--ease-in-out);
}
.hero-avg-label { color: var(--text-dim); font-size: 13px; margin-bottom: 6px; }
.hero-avg-value {
  font-family: var(--font-mono);
  font-size: 46px;
  font-weight: 600;
  color: var(--text);
  line-height: 1;
  font-variant-numeric: tabular-nums;
}
.hero-avg-value span { font-size: 20px; color: var(--text-faint); }
.hero-row { display: flex; justify-content: space-between; align-items: flex-end; gap: 12px; flex-wrap: wrap; min-width: 0; }
.hero-row > div { min-width: 0; }
.hero-chip {
  font-size: 12px;
  padding: 5px 10px;
  border-radius: 100px;
  background: var(--surface-2);
  border: 1px solid var(--border);
  color: var(--text-dim);
  max-width: 100%;
  transition: background var(--dur-base) var(--ease-out), border-color var(--dur-base) var(--ease-out);
}

.stat-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 10px;
  margin-bottom: 16px;
}
.stat-box {
  background: var(--surface);
  border: 1px solid var(--border-soft);
  border-radius: var(--radius-m);
  padding: 14px;
  min-width: 0;
  transition: border-color var(--dur-base) var(--ease-out), transform var(--dur-fast) var(--ease-out);
}
.stat-box:active { transform: var(--tap); }
.stat-box .num { font-family: var(--font-mono); font-size: 24px; font-weight: 600; overflow-wrap: break-word; font-variant-numeric: tabular-nums; }
.stat-box .lbl { font-size: 12px; color: var(--text-faint); margin-top: 2px; }
.stat-box.ok .num { color: var(--ok); }
.stat-box.warn .num { color: var(--warn); }
.stat-box.danger .num { color: var(--danger); }

/* ===================== CHIPS / FILTROS ===================== */
.chip-row {
  display: flex; gap: 8px; overflow-x: auto; padding-bottom: 4px; margin-bottom: 14px;
  scrollbar-width: none;
  -webkit-overflow-scrolling: touch;
  scroll-snap-type: x proximity;
}
.chip-row::-webkit-scrollbar { display: none; }
.chip {
  flex: 0 0 auto;
  padding: 8px 14px;
  border-radius: 100px;
  background: var(--surface-2);
  border: 1px solid var(--border);
  color: var(--text-dim);
  font-size: 13px;
  cursor: pointer;
  white-space: nowrap;
  scroll-snap-align: start;
  transition: background var(--dur-base) var(--ease-out),
              color var(--dur-base) var(--ease-out),
              border-color var(--dur-base) var(--ease-out),
              transform var(--dur-fast) var(--ease-out);
}
.chip:hover { border-color: var(--accent); color: var(--text); }
.chip:active { transform: var(--tap); }
.chip.active { background: var(--accent); color: var(--accent-contrast); border-color: var(--accent); font-weight: 600; }

/* ===================== LISTA DE MATÉRIAS ===================== */
.subject-item {
  display: flex; align-items: center; gap: 12px;
  background: var(--surface);
  border: 1px solid var(--border-soft);
  border-radius: var(--radius-m);
  padding: 14px;
  margin-bottom: 10px;
  cursor: pointer;
  min-width: 0;
  transition: background var(--dur-base) var(--ease-out),
              border-color var(--dur-base) var(--ease-out),
              transform var(--dur-fast) var(--ease-out);
}
.subject-item:hover { border-color: color-mix(in srgb, var(--border) 40%, var(--accent)); }
.subject-item:active { background: var(--surface-2); transform: var(--tap); }
.subject-avg {
  width: 46px; height: 46px; border-radius: 12px;
  display: flex; align-items: center; justify-content: center;
  font-family: var(--font-mono); font-weight: 700; font-size: 15px;
  flex-shrink: 0;
  transition: background var(--dur-base) var(--ease-out), color var(--dur-base) var(--ease-out);
}
.subject-avg.ok { background: var(--ok-soft); color: var(--ok); }
.subject-avg.warn { background: var(--warn-soft); color: var(--warn); }
.subject-avg.danger { background: var(--danger-soft); color: var(--danger); }
.subject-avg.neutral { background: var(--surface-2); color: var(--text-faint); }
.subject-info { flex: 1; min-width: 0; }
.subject-name { font-weight: 600; font-size: 14.5px; white-space: normal; overflow-wrap: break-word; word-break: break-word; }
.subject-tags { display: flex; gap: 6px; margin-top: 5px; flex-wrap: wrap; min-width: 0; }
.tag {
  font-size: 10.5px; padding: 2px 8px; border-radius: 100px;
  border: 1px solid var(--border); color: var(--text-faint); white-space: nowrap;
  transition: border-color var(--dur-base) var(--ease-out), color var(--dur-base) var(--ease-out);
}
.tag.progressao { color: var(--warn); border-color: color-mix(in srgb, var(--warn) 40%, var(--border)); }
.tag.area-linguagens { color: #f472b6; border-color: rgba(244,114,182,.35); }
.tag.area-humanas { color: #60a5fa; border-color: rgba(96,165,250,.35); }
.tag.area-natureza { color: #4ade80; border-color: rgba(74,222,128,.35); }
.tag.area-matematica { color: #fbbf24; border-color: rgba(251,191,36,.35); }
.tag.area-tecnica { color: #a78bfa; border-color: rgba(167,139,250,.35); }
.subject-chevron {
  color: var(--text-faint);
  font-size: 18px;
  transition: transform var(--dur-base) var(--ease-out);
}
.subject-item:hover .subject-chevron { transform: translateX(2px); }

.empty-state {
  text-align: center; padding: 40px 20px; color: var(--text-faint);
  animation: fadeIn var(--dur-slow) var(--ease-out);
}

/* ===================== DETALHE DA MATÉRIA ===================== */
.back-btn {
  display: inline-flex; align-items: center; gap: 6px;
  background: none; border: none; color: var(--text-dim);
  font-size: 14px; cursor: pointer; padding: 4px 0; margin-bottom: 10px;
  transition: color var(--dur-base) var(--ease-out), transform var(--dur-fast) var(--ease-out);
}
.back-btn:hover { color: var(--text); }
.back-btn:active { transform: translateX(-2px); }
.detail-header h2 { font-size: 21px; margin: 0 0 8px; overflow-wrap: break-word; word-break: break-word; }
.detail-header .subject-tags { margin-bottom: 16px; }

.bimestre-tabs {
  display: flex; gap: 6px; margin-bottom: 14px; overflow-x: auto;
  flex-wrap: wrap;
  -webkit-overflow-scrolling: touch;
}
.bimestre-tab {
  flex: 0 0 auto; padding: 9px 16px; border-radius: 100px;
  background: var(--surface-2); border: 1px solid var(--border);
  color: var(--text-dim); font-size: 13px; font-weight: 600; cursor: pointer;
  white-space: nowrap;
  transition: background var(--dur-base) var(--ease-out),
              color var(--dur-base) var(--ease-out),
              border-color var(--dur-base) var(--ease-out),
              transform var(--dur-fast) var(--ease-out);
}
.bimestre-tab:hover { border-color: var(--accent); }
.bimestre-tab:active { transform: var(--tap); }
.bimestre-tab.active { background: var(--accent); color: var(--accent-contrast); border-color: var(--accent); }

.field-group { margin-bottom: 14px; min-width: 0; animation: fadeIn var(--dur-base) var(--ease-out); }
.field-label {
  font-size: 12px; color: var(--text-faint); margin-bottom: 6px;
  display: flex; justify-content: space-between; align-items: center;
  flex-wrap: wrap; gap: 4px;
}
.provas-list { display: flex; flex-direction: column; gap: 8px; }
.prova-row { display: flex; align-items: center; gap: 8px; min-width: 0; }
.prova-row input { flex: 1; min-width: 0; }
.prova-row .rm-btn {
  width: 36px; height: 36px; border-radius: 8px;
  background: var(--surface-2); border: 1px solid var(--border);
  color: var(--danger); cursor: pointer; flex-shrink: 0;
  transition: background var(--dur-base) var(--ease-out),
              border-color var(--dur-base) var(--ease-out),
              transform var(--dur-fast) var(--ease-out);
}
.prova-row .rm-btn:hover { background: var(--danger-soft); border-color: var(--danger); }
.prova-row .rm-btn:active { transform: var(--tap); }
.add-prova-btn {
  margin-top: 4px;
  background: none; border: 1px dashed var(--border);
  color: var(--accent); padding: 10px; border-radius: var(--radius-s);
  cursor: pointer; font-size: 13px; width: 100%;
  transition: background var(--dur-base) var(--ease-out),
              border-color var(--dur-base) var(--ease-out),
              transform var(--dur-fast) var(--ease-out);
}
.add-prova-btn:hover { background: var(--accent-soft); border-color: var(--accent); }
.add-prova-btn:active { transform: var(--tap); }

.two-col { display: grid; grid-template-columns: 1fr 1fr; gap: 10px; min-width: 0; }
.two-col > * { min-width: 0; }

.bimestre-summary {
  display: flex; justify-content: space-between; align-items: center;
  background: var(--surface-2); border-radius: var(--radius-m);
  padding: 14px; margin-bottom: 16px;
  gap: 10px; flex-wrap: wrap;
  transition: background var(--dur-base) var(--ease-out);
}
.bimestre-summary > div { min-width: 0; }
.bimestre-summary .val { font-family: var(--font-mono); font-size: 22px; font-weight: 700; overflow-wrap: break-word; font-variant-numeric: tabular-nums; }
.bimestre-summary .lbl { font-size: 11px; color: var(--text-faint); }

.chart-wrap { position: relative; height: 220px; margin: 10px 0 4px; max-width: 100%; overflow: hidden; }

.save-bar {
  position: sticky; bottom: calc(72px + var(--safe-bottom));
  display: flex; justify-content: center; margin-top: 16px;
  z-index: 15;
}
.save-btn {
  background: var(--accent); color: var(--accent-contrast);
  border: none; padding: 13px 28px; border-radius: 100px;
  font-weight: 600; font-size: 14px; cursor: pointer;
  box-shadow: var(--shadow-accent);
  transition: transform var(--dur-fast) var(--ease-out),
              box-shadow var(--dur-base) var(--ease-out),
              filter var(--dur-base) var(--ease-out);
}
.save-btn:hover { filter: brightness(1.05); transform: translateY(-1px); }
.save-btn:active { transform: var(--tap); }

/* ===================== INSIGHTS ===================== */
.rank-list { display: flex; flex-direction: column; gap: 8px; }
.rank-row {
  display: flex; align-items: center; gap: 10px;
  background: var(--surface); border: 1px solid var(--border-soft);
  border-radius: var(--radius-s); padding: 10px 12px;
  min-width: 0;
  transition: border-color var(--dur-base) var(--ease-out), background var(--dur-base) var(--ease-out);
}
.rank-row:hover { border-color: color-mix(in srgb, var(--border) 40%, var(--accent)); }
.rank-pos {
  width: 24px; height: 24px; border-radius: 50%;
  background: var(--surface-2); color: var(--text-dim);
  font-size: 11px; font-weight: 700; font-family: var(--font-mono);
  display: flex; align-items: center; justify-content: center; flex-shrink: 0;
}
.rank-name { flex: 1; font-size: 13.5px; font-weight: 500; white-space: normal; overflow-wrap: break-word; word-break: break-word; min-width: 0; }
.rank-val { font-family: var(--font-mono); font-weight: 700; font-size: 14px; flex-shrink: 0; white-space: nowrap; font-variant-numeric: tabular-nums; }

.tendencia-badge {
  display: inline-flex; align-items: center; gap: 2px;
  font-size: 11px; font-weight: 700; padding: 1px 7px; border-radius: 100px;
  font-family: var(--font-mono);
}
.tendencia-badge.ok { background: var(--ok-soft); color: var(--ok); }
.tendencia-badge.danger { background: var(--danger-soft); color: var(--danger); }
.tendencia-badge.neutral { background: var(--surface-2); color: var(--text-faint); }

.subject-professor { font-size: 11.5px; color: var(--text-faint); margin-top: 2px; }

.tag.freq-risco { color: var(--danger); border-color: color-mix(in srgb, var(--danger) 40%, var(--border)); }

.field-hint { font-size: 12px; margin-top: 4px; color: var(--text-faint); }

.calc-card {
  background: var(--accent-soft);
  border: 1px solid color-mix(in srgb, var(--accent) 35%, var(--border));
  border-radius: var(--radius-m);
  padding: 14px 16px;
  margin-bottom: 16px;
}
.calc-card-title { font-weight: 700; font-size: 13.5px; margin-bottom: 6px; color: var(--text); }
.calc-card-body { font-size: 13px; color: var(--text-dim); line-height: 1.55; }
.calc-card-body b { color: var(--text); }

.alert-card {
  border-left: 3px solid var(--warn);
  background: var(--warn-soft);
  border-radius: var(--radius-s);
  padding: 12px 14px;
  margin-bottom: 8px;
  font-size: 13px;
  animation: fadeUp var(--dur-base) var(--ease-out);
}
.alert-card.danger { border-left-color: var(--danger); background: var(--danger-soft); }
.alert-card b { display: block; margin-bottom: 2px; }

/* ===================== CONFIG ===================== */
.hue-slider-wrap { margin: 10px 0 4px; }
input[type="range"] {
  -webkit-appearance: none; appearance: none;
  width: 100%; height: 14px; border-radius: 100px;
  background: linear-gradient(to right,
    hsl(0 70% 55%), hsl(60 70% 55%), hsl(120 70% 55%),
    hsl(180 70% 55%), hsl(240 70% 55%), hsl(300 70% 55%), hsl(360 70% 55%));
  padding: 0; border: none;
  cursor: pointer;
}
input[type="range"]:focus { box-shadow: none; }
input[type="range"]::-webkit-slider-thumb {
  -webkit-appearance: none;
  width: 26px; height: 26px; border-radius: 50%;
  background: #fff; border: 3px solid var(--accent);
  cursor: pointer; box-shadow: var(--shadow-s);
  transition: transform var(--dur-fast) var(--ease-out);
}
input[type="range"]::-webkit-slider-thumb:hover { transform: scale(1.08); }
input[type="range"]::-webkit-slider-thumb:active { transform: scale(1.14); }
input[type="range"]::-moz-range-thumb {
  width: 26px; height: 26px; border-radius: 50%;
  background: #fff; border: 3px solid var(--accent);
  cursor: pointer; box-shadow: var(--shadow-s);
  transition: transform var(--dur-fast) var(--ease-out);
}
input[type="range"]::-moz-range-thumb:hover { transform: scale(1.08); }
input[type="range"]::-moz-range-track {
  height: 14px; border-radius: 100px; border: none;
  background: linear-gradient(to right,
    hsl(0 70% 55%), hsl(60 70% 55%), hsl(120 70% 55%),
    hsl(180 70% 55%), hsl(240 70% 55%), hsl(300 70% 55%), hsl(360 70% 55%));
}
.theme-presets { display: flex; gap: 10px; margin-top: 14px; flex-wrap: wrap; }
.preset-dot {
  width: 34px; height: 34px; border-radius: 50%;
  border: 2px solid transparent; cursor: pointer;
  transition: transform var(--dur-fast) var(--ease-spring), border-color var(--dur-base) var(--ease-out);
}
.preset-dot:hover { transform: scale(1.08); }
.preset-dot:active { transform: scale(0.96); }
.preset-dot.selected { border-color: var(--text); transform: scale(1.05); }

.toggle-row {
  display: flex; justify-content: space-between; align-items: center;
  padding: 12px 0; border-bottom: 1px solid var(--border-soft);
  transition: border-color var(--dur-base) var(--ease-out);
}
.toggle-row:last-child { border-bottom: none; }
.switch { position: relative; width: 46px; height: 26px; flex-shrink: 0; }
.switch input { position: absolute; opacity: 0; width: 100%; height: 100%; margin: 0; cursor: pointer; z-index: 1; }
.switch-track {
  position: absolute; inset: 0; background: var(--surface-2); border: 1px solid var(--border);
  border-radius: 100px; cursor: pointer;
  transition: background var(--dur-base) var(--ease-out), border-color var(--dur-base) var(--ease-out);
}
.switch-track::before {
  content: ''; position: absolute; width: 18px; height: 18px; border-radius: 50%;
  background: var(--text-faint); top: 3px; left: 3px;
  transition: transform var(--dur-base) var(--ease-spring), background var(--dur-base) var(--ease-out);
}
.switch input:checked + .switch-track { background: var(--accent-soft); border-color: var(--accent); }
.switch input:checked + .switch-track::before { background: var(--accent); transform: translateX(20px); }
.switch input:focus-visible + .switch-track { outline: 2px solid var(--accent); outline-offset: 2px; }

.btn-primary, .btn-secondary, .btn-danger-outline {
  padding: 13px; border-radius: var(--radius-s); font-weight: 600; cursor: pointer; width: 100%;
  font-size: 14px; border: none;
  transition: transform var(--dur-fast) var(--ease-out),
              filter var(--dur-base) var(--ease-out),
              background var(--dur-base) var(--ease-out),
              border-color var(--dur-base) var(--ease-out),
              box-shadow var(--dur-base) var(--ease-out);
}
.btn-primary:active, .btn-secondary:active, .btn-danger-outline:active { transform: var(--tap); }
.btn-primary { background: var(--accent); color: var(--accent-contrast); }
.btn-primary:hover { filter: brightness(1.06); box-shadow: var(--shadow-accent); }
.btn-secondary { background: var(--surface-2); color: var(--text); border: 1px solid var(--border); }
.btn-secondary:hover { background: var(--surface); border-color: var(--accent); }
.btn-danger-outline { background: none; color: var(--danger); border: 1px solid rgba(251,113,133,.4); }
.btn-danger-outline:hover { background: var(--danger-soft); border-color: var(--danger); }

/* Modal simples */
.modal-overlay {
  position: fixed; inset: 0; background: rgba(0,0,0,.55);
  display: flex; align-items: flex-end; justify-content: center;
  z-index: 50;
  animation: fadeIn var(--dur-base) var(--ease-out);
}
.modal-sheet {
  background: var(--bg-elevated); width: 100%; max-width: 480px;
  border-radius: 22px 22px 0 0; padding: 20px 20px calc(24px + var(--safe-bottom));
  max-height: 86vh; overflow-y: auto;
  box-shadow: var(--shadow-l);
  animation: sheetUp var(--dur-slow) var(--ease-out);
}
.modal-sheet h3 { margin: 0 0 16px; }
.modal-close-x {
  float: right; background: var(--surface-2); border: none; color: var(--text-dim);
  width: 30px; height: 30px; border-radius: 50%; cursor: pointer;
  transition: background var(--dur-base) var(--ease-out), transform var(--dur-fast) var(--ease-out);
}
.modal-close-x:hover { background: var(--surface); color: var(--text); }
.modal-close-x:active { transform: var(--tap); }

.toast {
  position: fixed; bottom: calc(96px + var(--safe-bottom)); left: 50%; transform: translateX(-50%) translateY(20px);
  background: var(--text); color: var(--bg);
  padding: 10px 18px; border-radius: 100px; font-size: 13px; font-weight: 600;
  opacity: 0; pointer-events: none;
  transition: opacity var(--dur-base) var(--ease-out), transform var(--dur-base) var(--ease-out);
  white-space: normal; text-align: center;
  max-width: calc(100vw - 32px);
  box-shadow: var(--shadow-m);
  z-index: 60;
}
.toast.show { opacity: 1; transform: translateX(-50%) translateY(0); }

label.field-checkbox { display: flex; align-items: center; gap: 8px; font-size: 13px; color: var(--text-dim); cursor: pointer; }
label.field-checkbox input[type="checkbox"] { width: auto; accent-color: var(--accent); cursor: pointer; }

/* ===================== SCROLLBAR (telas com mouse) ===================== */
@media (hover: hover) and (pointer: fine) {
  * { scrollbar-width: thin; scrollbar-color: var(--border) transparent; }
  *::-webkit-scrollbar { width: 8px; height: 8px; }
  *::-webkit-scrollbar-track { background: transparent; }
  *::-webkit-scrollbar-thumb { background: var(--border); border-radius: 100px; }
  *::-webkit-scrollbar-thumb:hover { background: var(--text-faint); }
}

/* ===================== RESPONSIVO — telas maiores ===================== */
@media (min-width: 640px) {
  .stat-grid { grid-template-columns: repeat(4, 1fr); }
  .view { padding-left: 24px; padding-right: 24px; }
  .card:hover, .subject-item:hover, .rank-row:hover { box-shadow: var(--shadow-s); }
}
@media (min-width: 900px) {
  .view { max-width: 900px; }
  .stat-grid { grid-template-columns: repeat(4, 1fr); }
}

/* ===================== RESPONSIVO — telas pequenas ===================== */
@media (max-width: 380px) {
  .view { padding-left: 12px; padding-right: 12px; }
  .card { padding: 14px; }
  .hero-avg { padding: 18px 16px; }
  .hero-avg-value { font-size: 34px; }
  .hero-avg-value span { font-size: 16px; }
  .stat-box .num { font-size: 20px; }
  .bimestre-summary .val { font-size: 18px; }
  .detail-header h2 { font-size: 18px; }
  .two-col { gap: 8px; }
  input, select, textarea { padding: 11px 12px; }
}
@media (max-width: 340px) {
  .stat-grid { grid-template-columns: 1fr 1fr; gap: 8px; }
  .two-col { grid-template-columns: 1fr; }
}

/* ===================== CHAT (IA) ===================== */
.chat-view { padding-bottom: 84px; }
.chat-header-note {
  display: flex; align-items: center; justify-content: space-between;
  gap: 8px; margin-bottom: 14px; flex-wrap: wrap;
}
.chat-ai-badge {
  display: inline-flex; align-items: center; gap: 6px;
  font-family: var(--font-display); font-size: 12.5px; font-weight: 600;
  color: var(--accent);
  background: var(--accent-soft);
  border: 1px solid var(--border-soft);
  padding: 6px 12px; border-radius: 100px;
}
.chat-note {
  font-size: 11px; color: var(--text-faint);
}
.chat-messages {
  display: flex; flex-direction: column; gap: 10px;
  margin-bottom: 12px;
}
.chat-empty {
  text-align: center; color: var(--text-faint); font-size: 13px;
  padding: 40px 20px; border: 1px dashed var(--border-soft);
  border-radius: var(--radius-l);
  animation: fadeIn var(--dur-slow) var(--ease-out);
}
.chat-empty b { color: var(--text-dim); }
.chat-bubble-row { display: flex; animation: fadeUp var(--dur-base) var(--ease-out); }
.chat-bubble-row.user { justify-content: flex-end; }
.chat-bubble-row.ai { justify-content: flex-start; }
.chat-bubble {
  max-width: 84%;
  padding: 11px 14px;
  border-radius: 16px;
  font-size: 14px;
  line-height: 1.5;
  white-space: pre-wrap;
  overflow-wrap: break-word;
  transition: background var(--dur-base) var(--ease-out);
}
.chat-bubble-row.user .chat-bubble {
  background: var(--accent);
  color: var(--accent-contrast);
  border-bottom-right-radius: 4px;
}
.chat-bubble-row.ai .chat-bubble {
  background: var(--surface);
  border: 1px solid var(--border-soft);
  border-bottom-left-radius: 4px;
  color: var(--text);
}
.chat-bubble-row.error .chat-bubble {
  background: var(--danger-soft);
  border: 1px solid var(--danger);
  color: var(--danger);
}
.chat-typing-dots {
  display: inline-flex; gap: 4px; padding: 4px 2px;
}
.chat-typing-dots span {
  width: 6px; height: 6px; border-radius: 50%;
  background: var(--text-faint);
  animation: chatDot 1.2s infinite ease-in-out;
}
.chat-typing-dots span:nth-child(2) { animation-delay: .15s; }
.chat-typing-dots span:nth-child(3) { animation-delay: .3s; }
@keyframes chatDot {
  0%, 60%, 100% { opacity: .3; transform: translateY(0); }
  30% { opacity: 1; transform: translateY(-3px); }
}
.chat-input-row {
  position: fixed;
  left: 0; right: 0;
  bottom: calc(78px + var(--safe-bottom));
  width: calc(100% - 32px);
  max-width: 688px;
  margin: 0 auto;
  display: flex; gap: 8px; align-items: center;
  padding: 10px;
  background: var(--surface);
  border: 1px solid var(--border-soft);
  border-radius: 100px;
  box-shadow: var(--shadow-m);
  z-index: 25;
  transition: box-shadow var(--dur-base) var(--ease-out), border-color var(--dur-base) var(--ease-out);
}
.chat-input-row:focus-within { border-color: var(--accent); box-shadow: var(--shadow-m), 0 0 0 3px var(--accent-soft); }
.chat-input-row input {
  border: none; background: transparent; padding: 6px 4px;
  border-radius: 0;
}
.chat-input-row input:focus { box-shadow: none; }
.chat-send-btn {
  flex-shrink: 0;
  width: 40px; height: 40px; border-radius: 50%;
  border: none; cursor: pointer;
  background: var(--accent); color: var(--accent-contrast);
  display: flex; align-items: center; justify-content: center;
  font-size: 16px;
  transition: transform var(--dur-fast) var(--ease-spring),
              filter var(--dur-base) var(--ease-out),
              opacity var(--dur-base) var(--ease-out);
}
.chat-send-btn:hover:not(:disabled) { filter: brightness(1.06); }
.chat-send-btn:active:not(:disabled) { transform: var(--tap); }
.chat-send-btn:disabled { opacity: .5; cursor: default; }
.chat-suggestions {
  display: flex; gap: 8px; overflow-x: auto; padding-bottom: 4px; margin-bottom: 10px;
  -webkit-overflow-scrolling: touch;
}
.chat-suggestion-chip {
  flex-shrink: 0; white-space: nowrap;
  font-size: 12.5px; color: var(--text-dim);
  background: var(--surface-2); border: 1px solid var(--border-soft);
  padding: 8px 13px; border-radius: 100px; cursor: pointer;
  transition: background var(--dur-base) var(--ease-out),
              border-color var(--dur-base) var(--ease-out),
              transform var(--dur-fast) var(--ease-out);
}
.chat-suggestion-chip:hover { border-color: var(--accent); color: var(--text); }
.chat-suggestion-chip:active { transform: var(--tap); }

/* ===================== ESTUDOS — Agenda ===================== */
.agenda-item {
  display: flex; gap: 12px; align-items: flex-start;
  background: var(--surface); border: 1px solid var(--border-soft);
  border-radius: var(--radius-m); padding: 14px; margin-bottom: 10px;
  transition: opacity var(--dur-base) var(--ease-out), border-color var(--dur-base) var(--ease-out);
}
.agenda-item.done { opacity: .55; }
.agenda-item.done .agenda-title { text-decoration: line-through; }
.agenda-check { display: flex; align-items: center; padding-top: 2px; }
.agenda-check input { width: 20px; height: 20px; accent-color: var(--accent); cursor: pointer; margin: 0; }
.agenda-info { flex: 1; min-width: 0; }
.agenda-title { font-weight: 600; font-size: 14.5px; overflow-wrap: break-word; word-break: break-word; }
.agenda-meta { display: flex; gap: 6px; margin-top: 6px; flex-wrap: wrap; }
.agenda-notes { font-size: 12.5px; color: var(--text-dim); margin-top: 6px; }
.agenda-actions { display: flex; gap: 14px; margin-top: 8px; flex-wrap: wrap; }
.agenda-link {
  font-size: 12px; color: var(--accent); cursor: pointer; text-decoration: none;
  transition: opacity var(--dur-fast) var(--ease-out);
}
.agenda-link:hover { opacity: .8; text-decoration: underline; }

/* ===================== ESTUDOS — Flashcards ===================== */
.flashcard-row {
  background: var(--surface); border: 1px solid var(--border-soft);
  border-radius: var(--radius-m); padding: 14px; margin-bottom: 10px;
}
.flashcard-front-preview { font-weight: 600; font-size: 14px; overflow-wrap: break-word; word-break: break-word; }
.flashcard-meta { display: flex; gap: 6px; margin-top: 8px; flex-wrap: wrap; }

.flashcard-stage {
  position: relative;
  min-height: 220px;
  background: var(--surface);
  border: 1px solid var(--border-soft);
  border-radius: var(--radius-l);
  padding: 28px 22px;
  display: flex; align-items: center; justify-content: center; text-align: center;
  cursor: pointer;
  margin-bottom: 16px;
  font-size: 17px; font-weight: 600;
  line-height: 1.5;
  animation: fadeUp var(--dur-slow) var(--ease-out);
  transition: border-color var(--dur-base) var(--ease-out), transform var(--dur-fast) var(--ease-out);
}
.flashcard-stage:active { transform: var(--tap); }
.flashcard-face { overflow-wrap: break-word; word-break: break-word; white-space: pre-wrap; }
.flashcard-face-back { color: var(--accent); }
.flashcard-hint {
  position: absolute; bottom: 12px; left: 0; right: 0; text-align: center;
  font-size: 11px; font-weight: 400; color: var(--text-faint);
}
.flashcard-review-actions { display: flex; gap: 10px; }
.flashcard-review-actions button { flex: 1; }

/* ===================== ESTUDOS — Pomodoro ===================== */
.pomodoro-card {
  background: linear-gradient(160deg, var(--accent-soft), var(--surface) 70%);
  border: 1px solid var(--border-soft);
  border-radius: var(--radius-l);
  padding: 28px 20px;
  text-align: center;
  margin-bottom: 18px;
}
.pomodoro-phase {
  font-family: var(--font-display); font-size: 13px; font-weight: 600;
  text-transform: uppercase; letter-spacing: 0.08em; color: var(--text-dim);
  margin-bottom: 6px;
}
.pomodoro-timer {
  font-family: var(--font-mono); font-size: 56px; font-weight: 700;
  font-variant-numeric: tabular-nums; color: var(--text); line-height: 1;
}
.pomodoro-cycles { font-size: 12.5px; color: var(--text-faint); margin-top: 8px; }
.pomodoro-controls { display: flex; gap: 8px; margin-top: 18px; }
.pomodoro-controls button { flex: 1; }

/* ===================== TOPBAR: WIDGET DE HOJE (dashboard) ===================== */
.today-widget {
  display: flex; flex-direction: column; gap: 10px;
}
.today-row { display: flex; align-items: center; justify-content: space-between; gap: 10px; }
.today-row-label { font-size: 12.5px; color: var(--text-dim); }
.today-row-value { font-family: var(--font-mono); font-weight: 600; font-size: 13.5px; }

textarea { resize: vertical; min-height: 70px; font-family: var(--font-body); }

/* ===================== PERFIL DA MATÉRIA — resumo de estudos + IA ===================== */
.summary-mini-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 8px;
}
.summary-mini-item {
  background: var(--surface-2);
  border: 1px solid var(--border-soft);
  border-radius: var(--radius-m);
  padding: 10px 8px;
  text-align: center;
  min-width: 0;
}
.summary-mini-item .num {
  font-family: var(--font-mono); font-size: 17px; font-weight: 600;
  color: var(--text); font-variant-numeric: tabular-nums;
}
.summary-mini-item .num.warn { color: var(--warn); }
.summary-mini-item .lbl {
  font-size: 10.5px; color: var(--text-faint); margin-top: 3px;
  line-height: 1.3; overflow-wrap: break-word;
}
.summary-actions { display: flex; gap: 8px; margin-top: 12px; }
.summary-actions button { flex: 1; padding: 10px; font-size: 13px; }
@media (max-width: 420px) {
  .summary-mini-grid { grid-template-columns: 1fr 1fr; }
  .summary-mini-item:last-child { grid-column: span 2; }
}

.ia-insight-card { position: relative; }
.ia-insight-header {
  display: flex; align-items: center; justify-content: space-between;
  gap: 8px; margin-bottom: 10px; flex-wrap: wrap;
}
.ia-insight-text {
  font-size: 13.5px; line-height: 1.55; color: var(--text-dim);
  margin-bottom: 10px;
}
.ia-insight-meta { font-size: 11px; color: var(--text-faint); margin-bottom: 10px; }
.ia-insight-empty {
  font-size: 13px; color: var(--text-faint); margin-bottom: 12px;
}