:root{
  color-scheme: light;
  --bg:        #F7F9FC;
  --bg-alt:    #FFFFFF;
  --ink:       #101828;
  --muted:     #4B5768;
  --muted-2:   #8390A3;
  --border:    #E3E8EF;
  --border-strong: #CBD3E0;

  --primary:      #1D4ED8;
  --primary-dark: #17399E;
  --primary-tint: #EAF0FE;
  --teal:         #0E8A78;
  --teal-tint:    #E6F5F2;

  /* "Clima" herdado do último jogo jogado (ver html.game-* abaixo).
     Por padrão espelha --primary, que já é a cor do Letris. */
  --mood:      var(--primary);
  --mood-dark: var(--primary-dark);
  --mood-tint: var(--primary-tint);

  --font-ui: -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  --radius: 12px;
  --shadow: 0 1px 2px rgba(16,24,40,.04), 0 1px 3px rgba(16,24,40,.06);
  --shadow-hover: 0 4px 12px rgba(16,24,40,.08);
}

/* ---------- clima por jogo (herdado ao voltar pro início) ---------- */
html.game-letrix{
  --mood:      var(--teal);
  --mood-dark: #0F766E;
  --mood-tint: var(--teal-tint);
}
html.game-letmaze{
  --mood:      #B4761F;
  --mood-dark: #8A5A15;
  --mood-tint: #FDF1E0;
}
html.game-letchess{
  --mood:      #6D28D9;
  --mood-dark: #5B21B6;
  --mood-tint: #EDE9FE;
}

/* ---------- modo noturno (herdado ao voltar pro início) ---------- */
html.night{
  color-scheme: dark;
  --bg:             #0B0F17;
  --bg-alt:         #121826;
  --ink:            #D7DBE2;
  --muted:          #A7B0C0;
  --muted-2:        #78839A;
  --border:         #232B3A;
  --border-strong:  #2E3849;
  --shadow:       0 1px 2px rgba(0,0,0,.5), 0 1px 3px rgba(0,0,0,.6);
  --shadow-hover: 0 4px 14px rgba(0,0,0,.55);
}

*{ box-sizing: border-box; }
html{ scroll-behavior: smooth; }

body{
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: var(--font-ui);
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
}

a{ color: inherit; }

.wrap{
  max-width: 1080px;
  margin: 0 auto;
  padding: 0 24px;
}

/* ---------- header ---------- */
header.topbar{
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 18px 24px;
  max-width: 1080px;
  margin: 0 auto;
}

.wordmark{
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 700;
  font-size: 18px;
  letter-spacing: -.01em;
  color: var(--ink);
  text-decoration: none;
}
.wordmark .tile{
  width: 28px; height: 28px;
  border-radius: 7px;
  background: var(--mood);
  display: flex; align-items: center; justify-content: center;
  color: #fff;
  font-weight: 700;
  font-size: 15px;
}
.wordmark span.dim{ color: var(--muted-2); font-weight: 500; }

header.topbar nav{ display: flex; align-items: center; gap: 4px; }
header.topbar nav a{
  text-decoration: none;
  color: var(--muted);
  font-size: 14.5px;
  font-weight: 600;
  padding: 8px 14px;
  border-radius: 8px;
  transition: color .15s ease, background .15s ease;
}
header.topbar nav a:hover{ color: var(--ink); background: var(--mood-tint); }
/* --mood-tint é sempre um pastel claro (pensado pra texto escuro em cima);
   no noturno --ink vira claro também, então o hover precisa de um fundo
   escuro próprio pra manter contraste. */
html.night header.topbar nav a:hover{ background: var(--border-strong); }

.topbar-right{ display: flex; align-items: center; gap: 18px; }

.lang-switch{
  display: flex;
  align-items: center;
  gap: 2px;
  background: var(--bg-alt);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 3px;
}
.lang-btn{
  appearance: none;
  border: none;
  background: transparent;
  color: var(--muted);
  font-size: 12.5px;
  font-weight: 700;
  letter-spacing: .02em;
  padding: 6px 10px;
  border-radius: 6px;
  cursor: pointer;
  text-decoration: none;
  transition: color .15s ease, background .15s ease;
}
.lang-btn:hover{ color: var(--ink); }
.lang-btn.active{ background: var(--mood); color: #fff; }

/* ---------- hero ---------- */
.hero{
  padding: 60px 24px 56px;
  border-bottom: 1px solid var(--border);
}
.hero-inner{
  max-width: 760px;
  margin: 0 auto;
  text-align: center;
}
.eyebrow{
  display: inline-flex;
  align-items: center;
  gap: 7px;
  font-size: 13px;
  font-weight: 600;
  color: var(--mood);
  background: var(--mood-tint);
  border: 1px solid var(--mood-tint);
  padding: 6px 14px;
  border-radius: 999px;
  margin-bottom: 24px;
}
h1{
  font-size: clamp(28px, 4.6vw, 42px);
  line-height: 1.2;
  letter-spacing: -.02em;
  margin: 0 0 18px;
  font-weight: 700;
  color: var(--ink);
}
.hero p.lead{
  font-size: clamp(15.5px, 1.6vw, 17.5px);
  color: var(--muted);
  max-width: 600px;
  margin: 0 auto 32px;
}

.hero-actions{
  display: flex;
  gap: 12px;
  justify-content: center;
  flex-wrap: wrap;
}
.btn{
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-weight: 600;
  font-size: 14.5px;
  padding: 12px 20px;
  border-radius: 9px;
  text-decoration: none;
  border: 1px solid transparent;
  cursor: pointer;
  transition: background .15s ease, border-color .15s ease, color .15s ease;
}
.btn-primary{
  background: var(--mood);
  color: #fff;
}
.btn-primary:hover{ background: var(--mood-dark); }
.btn-ghost{
  background: var(--bg-alt);
  color: var(--ink);
  border-color: var(--border-strong);
}
.btn-ghost:hover{ border-color: var(--mood); color: var(--mood); }

/* ---------- section shell ---------- */
section{ padding: 56px 24px; }
section.alt{ background: var(--bg-alt); border-top: 1px solid var(--border); border-bottom: 1px solid var(--border); }
.section-head{
  max-width: 620px;
  margin: 0 auto 36px;
}
.section-head .kicker{
  display: block;
  font-size: 12.5px;
  font-weight: 700;
  letter-spacing: .06em;
  text-transform: uppercase;
  color: var(--teal);
  margin-bottom: 8px;
}
.section-head h2{
  font-size: clamp(22px, 3vw, 27px);
  margin: 0 0 10px;
  font-weight: 700;
  letter-spacing: -.01em;
}
.section-head p{
  color: var(--muted);
  margin: 0;
  font-size: 15px;
  max-width: 520px;
}

/* ---------- tools grid ---------- */
.grid{
  max-width: 1080px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 18px;
}

.card{
  background: var(--bg-alt);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 24px;
  display: flex;
  flex-direction: column;
  box-shadow: var(--shadow);
  transition: box-shadow .15s ease, border-color .15s ease;
  text-decoration: none;
  color: inherit;
}
a.card.playable:hover{
  box-shadow: var(--shadow-hover);
  border-color: var(--border-strong);
}

.card-top{
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  margin-bottom: 16px;
}

.icon-box{
  width: 40px; height: 40px;
  border-radius: 9px;
  display: flex; align-items: center; justify-content: center;
  font-weight: 700;
  font-size: 15px;
}
.icon-box.letris{ background: var(--primary-tint); color: var(--primary); }
.icon-box.letrix{ background: var(--teal-tint); color: var(--teal); }
.icon-box.letmaze{ background: #FDF1E0; color: #B4761F; font-size: 20px; }
.icon-box.chess{ background: #EDE9FE; color: #6D28D9; }

.status{
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 12.5px;
  font-weight: 600;
}
.status .dot{ width: 7px; height: 7px; border-radius: 50%; }
.status.live{ color: var(--teal); }
.status.live .dot{ background: var(--teal); }
.status.dev{ color: var(--muted-2); }
.status.dev .dot{ background: var(--muted-2); }

.card h3{
  font-size: 19px;
  margin: 0 0 8px;
  font-weight: 700;
}
.card p.desc{
  color: var(--muted);
  font-size: 14px;
  margin: 0 0 16px;
  flex-grow: 1;
}
.card .tags{
  display: flex;
  flex-wrap: wrap;
  gap: 7px;
  margin-bottom: 18px;
}
.card .tags span{
  font-size: 12px;
  color: var(--muted);
  background: var(--bg);
  border: 1px solid var(--border);
  padding: 4px 9px;
  border-radius: 6px;
}
.card .cta{
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-weight: 600;
  font-size: 14px;
  color: var(--mood);
}
.card .cta.disabled{ color: var(--muted-2); }
.card .cta svg{ transition: transform .15s ease; }
a.card.playable:hover .cta svg{ transform: translateX(3px); }

.card.teaser{
  border-style: dashed;
  align-items: center;
  justify-content: center;
  text-align: center;
  color: var(--muted-2);
  box-shadow: none;
  background: transparent;
}
.card.teaser p{ margin: 0; font-size: 13.5px; }

/* ---------- trust grid (para escolas) ---------- */
.trust-grid{
  max-width: 1080px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 28px 32px;
}
.trust-item{ display: flex; gap: 14px; }
.trust-item .check{
  flex: none;
  width: 22px; height: 22px;
  border-radius: 50%;
  background: var(--teal-tint);
  color: var(--teal);
  display: flex; align-items: center; justify-content: center;
  margin-top: 2px;
}
.trust-item h4{
  font-size: 15px;
  margin: 0 0 4px;
  font-weight: 700;
}
.trust-item p{
  font-size: 13.5px;
  color: var(--muted);
  margin: 0;
}

/* ---------- footer ---------- */
footer{
  padding: 28px 24px 34px;
}
footer .wrap{
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 12px;
}
footer .fine{
  color: var(--muted-2);
  font-size: 13px;
}

@media (max-width: 560px){
  header.topbar{ padding: 16px 20px; }
  .hero{ padding: 44px 20px 40px; }
  section{ padding: 44px 20px; }
}