@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;700&display=swap');

:root {
  --space-1: 2.8px; --space-2: 5.6px; --space-3: 8.4px; --space-4: 11.2px; --space-6: 16.8px; --space-8: 22.4px;
  --radius-sm: 4px; --radius-md: 8px; --radius-lg: 14px;
  --font-heading: "Inter", system-ui, sans-serif;
  --font-heading-weight: 600;
  --font-body: "Inter", system-ui, sans-serif;

  --color-bg: #05070A; --color-surface: #10151d; --color-text: #F8FAFC;
  --color-accent: #22C55E; --color-accent-2: #F59E0B; --color-divider: #23303f;
  --color-accent-100: color-mix(in srgb, #22C55E 18%, white);
  --color-accent-200: color-mix(in srgb, #22C55E 32%, white);
  --color-accent-300: #4ADE80;
  --color-accent-800: color-mix(in srgb, #22C55E 65%, black);
  --color-accent-900: color-mix(in srgb, #22C55E 82%, black);
  --color-neutral-300: #aab6c6; --color-neutral-400: #7d8aa0; --color-neutral-500: #5c6b80;
  --color-neutral-600: #3c4b60; --color-neutral-700: #23303f;
  --color-neutral-800: #0d121a; --color-neutral-900: #000000;
  --shadow-sm: 0 0 0 1px var(--color-divider);
  --shadow-md: 0 0 0 1px var(--color-divider), 0 6px 18px rgba(0,0,0,0.55);
}

:root[data-theme="claro"] {
  --color-bg: #FFFFFF; --color-surface: #F1F5F9; --color-text: #0B1120;
  --color-accent: #16A34A; --color-accent-2: #F59E0B; --color-divider: #CBD5E1;
  --color-accent-100: color-mix(in srgb, #16A34A 15%, white);
  --color-accent-200: color-mix(in srgb, #16A34A 28%, white);
  --color-accent-300: #15803D;
  --color-accent-800: color-mix(in srgb, #16A34A 70%, black);
  --color-accent-900: color-mix(in srgb, #16A34A 85%, black);
  --color-neutral-300: #334155; --color-neutral-400: #475569; --color-neutral-500: #64748B;
  --color-neutral-600: #94A3B8; --color-neutral-700: #CBD5E1;
  --color-neutral-800: #E2E8F0; --color-neutral-900: #F8FAFC;
}

@media (prefers-color-scheme: light) {
  :root:not([data-theme="escuro"]) {
    --color-bg: #FFFFFF; --color-surface: #F1F5F9; --color-text: #0B1120;
    --color-accent: #16A34A; --color-accent-2: #F59E0B; --color-divider: #CBD5E1;
    --color-accent-100: color-mix(in srgb, #16A34A 15%, white);
    --color-accent-200: color-mix(in srgb, #16A34A 28%, white);
    --color-accent-300: #15803D;
    --color-accent-800: color-mix(in srgb, #16A34A 70%, black);
    --color-accent-900: color-mix(in srgb, #16A34A 85%, black);
    --color-neutral-300: #334155; --color-neutral-400: #475569; --color-neutral-500: #64748B;
    --color-neutral-600: #94A3B8; --color-neutral-700: #CBD5E1;
    --color-neutral-800: #E2E8F0; --color-neutral-900: #F8FAFC;
  }
}

* , *::before, *::after { box-sizing: border-box; }
html, body { margin: 0; background:
    radial-gradient(1100px 500px at 12% -8%, color-mix(in srgb, var(--color-accent) 14%, transparent), transparent 60%),
    radial-gradient(900px 460px at 100% 0%, color-mix(in srgb, var(--color-accent-2) 8%, transparent), transparent 55%),
    var(--color-bg);
  background-attachment: fixed; color: var(--color-text); font-family: var(--font-body); font-size: 15px; line-height: 1.55; }
h1, h2, h3, h4, h5, h6 { font-family: var(--font-heading); font-weight: var(--font-heading-weight); line-height: 1.15; letter-spacing: -0.015em; margin: 0 0 var(--space-2); }
h1 { font-size: 34px; } h2 { font-size: 26px; } h3 { font-size: 20px; } h4 { font-size: 17px; }
p { margin: 0 0 var(--space-3); }
a { color: var(--color-accent); text-underline-offset: 3px; }
.text-muted { color: color-mix(in srgb, var(--color-text) 55%, transparent); }
:focus { outline: none; }
:focus-visible { outline: 2px solid var(--color-accent); outline-offset: 2px; }

.btn { display: inline-flex; align-items: center; justify-content: center; gap: 6px; cursor: pointer; text-decoration: none;
  font-family: var(--font-heading); font-weight: var(--font-heading-weight); font-size: 14px; line-height: 1.2; color: var(--color-text);
  background: transparent; border: 1px solid transparent; padding: var(--space-2) calc(var(--space-3) * 1.4); border-radius: var(--radius-md);
  transition: background .15s ease, transform .15s ease, box-shadow .15s ease, border-color .15s ease; }
.btn-primary { color: #fff; background: linear-gradient(135deg, var(--color-accent-300), var(--color-accent)); border-color: transparent; box-shadow: 0 4px 14px color-mix(in srgb, var(--color-accent) 35%, transparent); }
.btn-primary:hover { transform: translateY(-1px); box-shadow: 0 6px 18px color-mix(in srgb, var(--color-accent) 45%, transparent); }
.btn-secondary { border-color: var(--color-divider); }
.btn-secondary:hover { background: color-mix(in srgb, var(--color-text) 7%, transparent); }
.btn-ghost { color: var(--color-accent); padding-inline: var(--space-1); }
.btn-ghost:hover { background: color-mix(in srgb, var(--color-accent) 10%, transparent); }
.btn-block { width: 100%; margin-top: var(--space-2); }
.btn-icon { width: 36px; height: 36px; padding: 0; }
.btn:disabled { opacity: .5; cursor: default; }

.field > label { display: block; font-size: 12px; margin-bottom: 5px; color: color-mix(in srgb, var(--color-text) 70%, transparent); }
.input { width: 100%; min-height: 36px; padding: 6px 10px; font: inherit; font-size: 14px; color: var(--color-text); caret-color: var(--color-accent);
  background: var(--color-surface); border: 1px solid var(--color-divider); border-radius: var(--radius-md); }
.input:hover { border-color: color-mix(in srgb, var(--color-text) 45%, transparent); }
.input:focus-visible { border-color: var(--color-accent); outline-offset: 0; }
textarea.input { min-height: 90px; resize: vertical; }

.seg { display: inline-flex; overflow: hidden; border: 1px solid var(--color-divider); border-radius: var(--radius-md); }
.seg-opt { display: inline-flex; align-items: center; gap: 6px; padding: 7px 12px; font-size: 13px; cursor: pointer; text-decoration: none; color: inherit; }
.seg-opt + .seg-opt { border-left: 1px solid var(--color-divider); }
.seg-opt.active { color: var(--color-accent); box-shadow: inset 0 0 0 1px var(--color-accent); }
.seg-opt:not(.active):hover { background: color-mix(in srgb, var(--color-text) 7%, transparent); }
.seg-opt input { position: absolute; opacity: 0; width: 0; height: 0; }

.card { display: flex; flex-direction: column; gap: var(--space-2); padding: var(--space-3); border-radius: var(--radius-md); background: var(--color-surface); border: 1px solid color-mix(in srgb, var(--color-divider) 70%, transparent); }
.card-kicker { font-size: 10px; letter-spacing: .1em; text-transform: uppercase; color: var(--color-accent); }
.card-title { font-family: var(--font-heading); font-weight: var(--font-heading-weight); font-size: 16px; line-height: 1.25; }
.card-meta { display: flex; align-items: center; gap: 6px; font-size: 11px; color: color-mix(in srgb, var(--color-text) 50%, transparent); }
.elev-sm { box-shadow: var(--shadow-sm); }
.elev-md { box-shadow: var(--shadow-md); }

.tag { display: inline-flex; align-items: center; font-size: 11px; letter-spacing: .02em; padding: 3px 10px; border-radius: calc(var(--radius-md) * .75); }
.tag-accent { background: var(--color-accent-800); color: var(--color-accent-100); }
.tag-outline { border: 1px solid var(--color-accent); color: var(--color-accent); }

.nav { display: flex; align-items: center; gap: var(--space-4); padding: var(--space-3) var(--space-4); }
.nav-brand { font-family: var(--font-heading); font-weight: var(--font-heading-weight); font-size: 18px; margin-right: auto; display: flex; align-items: center; gap: var(--space-2); }
.nav a { color: inherit; text-decoration: none; font-size: 14px; }
.nav a:hover { color: var(--color-accent); }

.avatar { width: 36px; height: 36px; border-radius: 50%; background: var(--color-accent-800); color: var(--color-accent-100); display: flex; align-items: center; justify-content: center; font-size: 13px; font-weight: 600; flex: none; }
.brand-badge { width: 24px; height: 24px; border-radius: 6px; background: var(--color-accent-800); color: var(--color-accent-100); display: flex; align-items: center; justify-content: center; font-size: 11px; font-weight: 600; }

.wrap { min-height: 100vh; }
.grid-lessons { display: grid; grid-template-columns: repeat(auto-fill, minmax(240px, 1fr)); gap: 24px; padding: 0 var(--space-6) var(--space-8); }
.thumb { aspect-ratio: 3/4; background: repeating-linear-gradient(135deg, var(--color-surface), var(--color-surface) 10px, var(--color-neutral-900) 10px, var(--color-neutral-900) 20px); background-size: cover; background-position: center; display: flex; align-items: center; justify-content: center; position: relative; border-radius: var(--radius-lg) var(--radius-lg) 0 0; overflow: hidden; }
.thumb::after { content: ''; position: absolute; inset: 0; background: linear-gradient(180deg, rgba(0,0,0,0) 55%, rgba(0,0,0,.75) 100%); pointer-events: none; }
.play-circle { width: 52px; height: 52px; border-radius: 50%; border: 2px solid rgba(255,255,255,.85); display: flex; align-items: center; justify-content: center; background: color-mix(in srgb, #000 40%, transparent); backdrop-filter: blur(2px); position: relative; z-index: 1; transition: transform .2s ease, background .2s ease; }
.lesson-card:hover .play-circle { transform: scale(1.1); background: var(--color-accent); border-color: var(--color-accent); }
.play-tri { width: 0; height: 0; border-top: 8px solid transparent; border-bottom: 8px solid transparent; border-left: 13px solid #fff; margin-left: 3px; }
.lesson-card { text-decoration: none; color: inherit; padding: 0; overflow: hidden; display: block; border-radius: var(--radius-lg); background: var(--color-surface); box-shadow: var(--shadow-sm); transition: transform .2s ease, box-shadow .2s ease; }
.lesson-card:hover { transform: translateY(-4px); box-shadow: 0 10px 28px rgba(0,0,0,.28), 0 0 0 1px color-mix(in srgb, var(--color-accent) 45%, var(--color-divider)); }
.lesson-card .card-body { padding: var(--space-3); display: flex; flex-direction: column; gap: var(--space-1); background: var(--color-surface); border-radius: 0 0 var(--radius-lg) var(--radius-lg); }
.badge-corner { position: absolute; top: 8px; right: 8px; z-index: 1; font-size: 11px; padding: 2px 8px; border-radius: 999px; backdrop-filter: blur(3px); }
.progress-track { height: 6px; border-radius: 999px; background: var(--color-neutral-700); overflow: hidden; }
.progress-fill { height: 100%; background: var(--color-accent); border-radius: 999px; }

.error-msg { background: color-mix(in srgb, #ef4444 15%, transparent); border: 1px solid #ef4444; color: #ef4444; padding: var(--space-3); border-radius: var(--radius-md); font-size: 13px; margin-bottom: var(--space-3); }

.ecqa { display: flex; flex-direction: column; gap: var(--space-3); padding: var(--space-4); border: 1px solid var(--color-divider); border-radius: var(--radius-md); background: color-mix(in srgb, var(--color-surface) 86%, transparent); overflow: hidden; }
.ecqa-form { display: flex; flex-direction: column; gap: var(--space-2); }
.ecqa-label { font-family: var(--font-heading); font-weight: var(--font-heading-weight); font-size: 15px; }
.ecqa-row { display: grid; grid-template-columns: minmax(0, 1fr) auto; gap: var(--space-2); align-items: center; }
.ecqa-input { min-height: 42px; }
.ecqa-loading .ecqa-submit { opacity: .72; pointer-events: none; }
.ecqa-status { min-height: 18px; font-size: 12px; color: color-mix(in srgb, var(--color-text) 58%, transparent); }
.ecqa-results { display: grid; gap: var(--space-3); }
.ecqa-card { display: flex; flex-direction: column; gap: var(--space-2); padding: var(--space-3); border: 1px solid color-mix(in srgb, var(--color-divider) 76%, transparent); border-radius: var(--radius-md); background: var(--color-surface); }
.ecqa-card-head { display: flex; justify-content: space-between; align-items: flex-start; gap: var(--space-3); flex-wrap: wrap; }
.ecqa-card h3 { margin: 0; font-size: 16px; letter-spacing: 0; }
.ecqa-card p { margin: 0; font-size: 13px; color: color-mix(in srgb, var(--color-text) 72%, transparent); }
.ecqa-confidence { height: 7px; border-radius: 999px; overflow: hidden; background: var(--color-neutral-700); }
.ecqa-confidence span { display: block; height: 100%; border-radius: inherit; background: var(--color-accent); }
.ecqa-actions { display: flex; gap: var(--space-2); flex-wrap: wrap; }
.ecqa-alert, .ecqa-empty { padding: var(--space-3); border-radius: var(--radius-md); font-size: 13px; background: color-mix(in srgb, var(--color-accent-2) 12%, transparent); border: 1px solid color-mix(in srgb, var(--color-accent-2) 60%, transparent); }
.ecqa-history { display: flex; gap: var(--space-2); flex-wrap: wrap; align-items: center; }
.ecqa-history-title { width: 100%; font-size: 11px; color: color-mix(in srgb, var(--color-text) 48%, transparent); }
.ecqa-chip { cursor: pointer; max-width: 100%; border: 1px solid var(--color-divider); color: var(--color-text); background: transparent; border-radius: var(--radius-md); padding: 5px 9px; font: inherit; font-size: 12px; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.ecqa-chip:hover { border-color: var(--color-accent); color: var(--color-accent); }

/* — menu lateral (mobile) — */
.hamb-btn { display: none; padding: 8px; }
.hamb-btn svg { display: block; width: 20px; height: 20px; }
.drawer-backdrop { position: fixed; inset: 0; background: rgba(0,0,0,.55); opacity: 0; pointer-events: none; transition: opacity .2s ease; z-index: 40; }
.drawer-backdrop.aberto { opacity: 1; pointer-events: auto; }
.drawer { position: fixed; top: 0; right: 0; height: 100dvh; width: min(280px, 82vw); background: var(--color-surface); border-left: 1px solid var(--color-divider); box-shadow: var(--shadow-md); transform: translateX(100%); transition: transform .25s ease; z-index: 41; display: flex; flex-direction: column; padding: var(--space-4); gap: var(--space-5); overflow-y: auto; }
.drawer.aberto { transform: translateX(0); }
.drawer-header { display: flex; align-items: center; justify-content: space-between; }
.drawer-perfil { display: flex; align-items: center; gap: var(--space-3); padding-bottom: var(--space-4); border-bottom: 1px solid var(--color-divider); }
.drawer-links { display: flex; flex-direction: column; gap: var(--space-2); }
.drawer-links .btn { width: 100%; justify-content: flex-start; }
.drawer-links form { margin: 0; }
.drawer-links form .btn { width: 100%; justify-content: flex-start; }

@media (max-width: 760px) {
  .nav-links-desktop { display: none !important; }
  .hamb-btn { display: inline-flex; }
  .ecqa-row { grid-template-columns: 1fr; }
  .ecqa-submit { width: 100%; }
}

@media (max-width: 720px) {
  h1 { font-size: 26px; }
  .grid-lessons { grid-template-columns: repeat(2, 1fr); gap: 16px; }
}

@media (max-width: 420px) {
  .grid-lessons { grid-template-columns: 1fr; }
  .thumb { aspect-ratio: 16/9; }
}

/* Botão único de troca de tema, mesmo modelo visual do editacodigo.com.br/inicio/ (pill,
   texto muda pro que vai virar ao clicar) -- substitui o .seg de dois botões antigo. Mantém
   os valores claro/escuro em data-theme (não muda pra light/dark do /inicio/, isso quebraria
   todo o resto do CSS deste arquivo que já depende de data-theme="claro"). */
.theme-toggle-btn {
  cursor: pointer;
  padding: 8px 16px;
  border-radius: 999px;
  border: 1px solid var(--color-divider);
  background: transparent;
  color: var(--color-text);
  font-weight: 600;
  font-size: 13px;
  font-family: var(--font-heading);
  transition: border-color .2s ease;
  white-space: nowrap;
}
.theme-toggle-btn:hover { border-color: var(--color-accent); }

/* ===== Pergunte as aulas (ecqa) v2: visual fluido ===== */
.ecqa { gap: 14px; padding: 18px; border-radius: 18px; border: 1px solid color-mix(in srgb, var(--color-accent) 22%, var(--color-divider)); background: linear-gradient(160deg, color-mix(in srgb, var(--color-surface) 92%, transparent), color-mix(in srgb, var(--color-bg) 70%, transparent)); box-shadow: 0 10px 28px rgba(0,0,0,.22); margin-top: 14px; }
.ecqa-form { gap: 10px; }
.ecqa-label { font-size: 13px; font-weight: 700; letter-spacing: .02em; text-transform: uppercase; color: color-mix(in srgb, var(--color-text) 62%, transparent); }
.ecqa-row { display: flex; align-items: stretch; gap: 10px; }
.ecqa-row .ecqa-input { flex: 1 1 auto; min-width: 0; min-height: 50px; padding: 0 16px; font-size: 16px; border-radius: 14px; border: 1.5px solid color-mix(in srgb, var(--color-text) 20%, transparent); background: color-mix(in srgb, var(--color-bg) 78%, transparent); transition: border-color .18s ease, box-shadow .18s ease; }
.ecqa-row .ecqa-input:focus { outline: none; border-color: var(--color-accent); box-shadow: 0 0 0 4px color-mix(in srgb, var(--color-accent) 22%, transparent); }
.ecqa-submit { flex: 0 0 auto; min-height: 50px; padding: 0 22px; border-radius: 14px; font-size: 15px; font-weight: 700; display: inline-flex; align-items: center; justify-content: center; gap: 8px; white-space: nowrap; }
.ecqa-loading .ecqa-submit { opacity: .85; pointer-events: none; }
.ecqa-loading .ecqa-submit::after { content: ""; width: 15px; height: 15px; border-radius: 50%; border: 2px solid rgba(255,255,255,.45); border-top-color: #fff; animation: ecqa-gira .7s linear infinite; }
@keyframes ecqa-gira { to { transform: rotate(360deg); } }
.ecqa-status { min-height: 0; font-size: 13px; }
.ecqa-status:empty { display: none; }
.ecqa-history { gap: 8px; }
.ecqa-history:empty { display: none; }
.ecqa-history-title { font-size: 11px; font-weight: 700; letter-spacing: .06em; text-transform: uppercase; color: color-mix(in srgb, var(--color-text) 50%, transparent); }
.ecqa-chip { border-radius: 999px; padding: 7px 14px; font-size: 13px; background: color-mix(in srgb, var(--color-text) 7%, transparent); border: 1px solid color-mix(in srgb, var(--color-text) 16%, transparent); color: var(--color-text); transition: background .15s ease, border-color .15s ease, transform .15s ease; }
.ecqa-chip:hover { background: color-mix(in srgb, var(--color-accent) 16%, transparent); border-color: var(--color-accent); color: var(--color-text); transform: translateY(-1px); }
.ecqa-results { gap: 12px; }
.ecqa-results:empty { display: none; }
.ecqa-card { padding: 14px 16px; border-radius: 14px; background: color-mix(in srgb, var(--color-bg) 55%, transparent); border: 1px solid color-mix(in srgb, var(--color-text) 14%, transparent); animation: ecqa-entra .35s ease both; transition: border-color .18s ease, transform .18s ease; }
.ecqa-card:hover { border-color: color-mix(in srgb, var(--color-accent) 55%, transparent); transform: translateY(-2px); }
@keyframes ecqa-entra { from { opacity: 0; transform: translateY(8px); } to { opacity: 1; transform: none; } }
.ecqa-card .card-kicker { display: inline-block; padding: 3px 10px; border-radius: 999px; font-size: 12px; font-weight: 700; background: color-mix(in srgb, var(--color-accent) 18%, transparent); color: var(--color-accent-300); }
.ecqa-confidence { height: 5px; }
.ecqa-actions .btn { border-radius: 12px; }
.ecqa-alert, .ecqa-empty { border-radius: 12px; }
@media (max-width: 640px) { .ecqa { padding: 14px; } .ecqa-row { flex-direction: column; } .ecqa-submit { width: 100%; } }
@media (prefers-reduced-motion: reduce) { .ecqa-card, .ecqa-chip, .ecqa-row .ecqa-input { animation: none; transition: none; } }