*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;font-family:Arial,Helvetica,sans-serif;background:#eaf2fb;color:#102033;width:100%;max-width:100%;overflow:hidden}.topbar{height:64px;background:#1f6ed4;color:#fff;display:flex;align-items:center;justify-content:space-between;padding:0 18px;box-shadow:0 2px 8px rgba(0,0,0,.18);position:sticky;top:0;z-index:20}.header-left{display:flex;align-items:center;gap:14px;min-width:0}.topbar h1{font-size:20px;margin:0;font-weight:800;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.portal-link{color:#fff;text-decoration:none;border:1px solid rgba(255,255,255,.45);padding:8px 14px;border-radius:999px;font-weight:700;background:rgba(255,255,255,.08)}.brand{font-weight:800;font-size:14px;white-space:nowrap}.layout{display:grid;grid-template-columns:220px minmax(0,1fr);height:calc(100vh - 64px);min-width:0;max-width:100%}.side-nav{background:#fff;border-right:1px solid #cbd8e8;padding:22px 14px;position:sticky;top:64px;height:calc(100vh - 64px);overflow:auto}.side-nav h3{text-transform:uppercase;font-size:13px;letter-spacing:.08em;color:#53657d;margin:0 0 14px}.nav-btn{display:block;text-decoration:none;color:#073f8e;font-weight:800;padding:11px 12px;border-radius:12px;margin-bottom:8px;border:1px solid #cfe0f6;background:#f7fbff}.nav-btn.active,.nav-btn:hover{background:#1f6ed4;color:#fff;box-shadow:0 6px 14px rgba(31,110,212,.25)}.content{padding:28px;width:100%;max-width:none;margin:0;min-width:0;overflow-y:auto;overflow-x:hidden}.hero-card,.section-card{background:#fff;border:1px solid #d3e0ef;border-radius:18px;box-shadow:0 10px 24px rgba(40,80,120,.08);padding:28px;margin-bottom:26px}.eyebrow{display:inline-block;color:#073f8e;background:#e8f2ff;border:1px solid #bcd5fa;border-radius:999px;font-size:12px;font-weight:900;text-transform:uppercase;letter-spacing:.06em;padding:8px 14px}.hero-card h2,.section-card h2{color:#094a9f;font-size:32px;line-height:1.1;margin:14px 0 10px}.hero-card p,.section-card p{font-size:17px;line-height:1.6}.hero-grid{display:grid;grid-template-columns:1fr 300px;gap:24px;align-items:center;margin-top:20px}.flow-line,.mini-flow{display:flex;align-items:center;gap:10px;flex-wrap:wrap;margin-top:16px}.flow-line span,.mini-flow span{background:#e8f2ff;border:1px solid #bfd7f6;color:#073f8e;padding:9px 13px;border-radius:999px;font-weight:800}.phone-preview{text-align:center;margin:0}.phone-preview img{max-width:235px;width:100%;height:auto}.phone-preview figcaption,.compact-figure figcaption,.toolbox figcaption{font-size:14px;color:#4a5d75;margin-top:8px}.notice{background:#fff7d6;border-left:6px solid #f59e0b;border-radius:12px;padding:16px 18px;margin-top:22px;font-size:16px;line-height:1.5}.section-head{display:flex;gap:14px;align-items:flex-start;margin-bottom:20px}.badge{display:inline-flex;align-items:center;justify-content:center;background:#1f6ed4;color:#fff;font-weight:900;border-radius:10px;min-width:42px;height:42px}.section-head h2{margin:0}.section-head p{margin:6px 0 0}.concept-grid,.planning-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}.concept-grid article,.planning-grid article,.text-panel,.activity-box,.story-panel,.exercise-group{background:#f8fbff;border:1px solid #d3e0ef;border-radius:16px;padding:18px}.concept-grid h3,.planning-grid h3,.text-panel h3,.activity-box h3,.story-panel h3,.exercise-group h3,.properties h4,.howto h4{color:#0b4da2;margin-top:0}.two-col{display:grid;grid-template-columns:1fr 1fr;gap:18px;margin-top:18px}.text-panel.blue{background:#eaf4ff}.activity-box{margin-top:18px}.activity-box li,.exercise-group li,.properties li,.howto li{font-size:16px;line-height:1.55;margin-bottom:6px}.image-pair{display:grid;grid-template-columns:1fr 1fr;gap:18px;align-items:start;margin-top:22px}.compact-figure{margin:0 auto;text-align:center;background:#f8fbff;border:1px solid #d3e0ef;border-radius:16px;padding:14px}.compact-figure img{max-width:100%;height:auto;border-radius:12px}.wireframe-figure img{max-width:300px}.image-pair .compact-figure:not(.wireframe-figure) img{max-width:420px}.layout-figure{max-width:780px}.layout-figure img{max-width:100%}.inline-figure{text-align:center;margin:14px 0 0}.inline-figure img{max-width:210px}.toolbox{margin-top:22px}.toolbox-grid{display:grid;grid-template-columns:1fr 1fr;gap:18px}.toolbox-grid figure{margin:0;background:#f8fbff;border:1px solid #d3e0ef;border-radius:16px;padding:14px;text-align:center}.toolbox-grid img{max-width:100%;height:auto}.hierarchy-box{background:#0f172a;color:#dbeafe;border-radius:16px;padding:20px;margin-top:20px;overflow:auto}.hierarchy-box h3{color:#fff;margin-top:0}.hierarchy-box p{color:#cbd5e1}.hierarchy-box pre{margin:0;white-space:pre;overflow:auto;font-size:14px;line-height:1.45}.step-card{display:grid;grid-template-columns:minmax(0,1fr) 300px;gap:22px;align-items:start;border:1px solid #d3e0ef;background:#f8fbff;border-radius:18px;padding:20px;margin:18px 0}.step-card h3{color:#0b4da2;font-size:24px;margin:8px 0}.step-label{display:inline-block;background:#1f6ed4;color:#fff;font-weight:900;border-radius:999px;padding:7px 12px;font-size:13px}.step-card figure{margin:0;text-align:center;position:sticky;top:92px}.step-card img{max-width:250px;width:100%;height:auto}.properties,.howto{background:#fff;border:1px solid #d6e2f0;border-radius:14px;padding:14px;margin-top:12px}.properties ul,.howto ol{margin:0;padding-left:20px}.exercise-group{margin:16px 0}.exercise-group ol{padding-left:22px}

/* ===== Ajustes consolidados — App Inventor ===== */

html{
  scroll-behavior:smooth;
  width:100%;
  max-width:100%;
  overflow-x:hidden;
}

*{
  min-width:0;
}

img{
  max-width:100%;
  height:auto;
}

pre,
code{
  max-width:100%;
}

section[id]{
  scroll-margin-top:16px;
}

.hero-card,
.section-card{
  max-width:100%;
}

.image-pair{
  grid-template-columns:280px 360px;
  justify-content:center;
  align-items:start;
}

.wireframe-figure img{
  max-width:210px;
}

.image-pair .compact-figure:not(.wireframe-figure) img{
  max-width:310px;
}

.layout-figure{
  max-width:680px;
}

.phone-preview img{
  max-width:220px;
}

.step-card img{
  max-width:230px;
}

.hierarchy-box,
.hierarchy-box pre{
  max-width:100%;
  overflow-x:auto;
}

/* Componentes adicionados nas etapas */
.added-box{
  background:#eef7ff;
  border:1px solid #bdd7f5;
  border-left:6px solid #1f6ed4;
  border-radius:14px;
  padding:14px;
  margin-top:12px;
}

.added-box h4{
  color:#0b4da2;
  margin:0 0 8px;
}

.added-box ul{
  margin:0;
  padding-left:20px;
}

.added-box li{
  font-size:16px;
  line-height:1.5;
  margin-bottom:4px;
}

/* ===== Exercícios visuais App Inventor ===== */

.exercises-interface .exercise-showcase{
  display:grid;
  grid-template-columns:repeat(5, minmax(0, 1fr));
  gap:10px;
  background:#f8fbff;
  border:1px solid #d3e0ef;
  border-radius:16px;
  padding:12px;
  margin-bottom:18px;
}

.exercise-tab{
  border:1px solid #cfe0f6;
  background:white;
  border-radius:12px;
  padding:8px;
  cursor:pointer;
  font-family:inherit;
  color:#0b4da2;
  font-weight:900;
  transition:.16s ease;
}

.exercise-tab:hover,
.exercise-tab.active{
  border-color:#1f6ed4;
  box-shadow:0 8px 18px rgba(31,110,212,.14);
  transform:translateY(-1px);
}

.exercise-tab img{
  width:100%;
  height:95px;
  object-fit:contain;
  display:block;
  margin-bottom:6px;
}

.exercise-tab span{
  display:block;
  font-size:13px;
}

.exercise-detail{
  display:none;
  grid-template-columns:minmax(0,1fr) 340px;
  gap:18px;
  align-items:center;
  background:#f8fbff;
  border:1px solid #d3e0ef;
  border-radius:16px;
  padding:18px;
  margin-bottom:14px;
}

.exercise-detail.active{
  display:grid;
}

.exercise-detail figure{
  margin:0;
  text-align:center;
}

.exercise-detail figure img{
  max-width:270px;
  width:100%;
  height:auto;
}

.exercise-text h3{
  color:#0b4da2;
  font-size:24px;
  margin:12px 0 8px;
}

.panel-title{
  background:#e8f2ff;
  border:1px solid #cfe0f6;
  color:#0b4da2;
  font-weight:900;
  border-radius:10px;
  padding:10px 12px;
}

.exercise-steps{
  display:grid;
  grid-template-columns:repeat(3, minmax(0,1fr));
  gap:10px;
  margin:14px 0 10px;
}

.exercise-steps div{
  background:white;
  border:1px solid #d3e0ef;
  border-radius:12px;
  padding:10px;
  font-size:14px;
  line-height:1.45;
}

.challenge{
  background:#fff7d6;
  border-left:5px solid #f59e0b;
  border-radius:10px;
  padding:12px;
  margin-top:10px;
}

/* ===== Responsivo consolidado ===== */

@media(max-width:900px){
  html,
  body{
    width:100%;
    max-width:100%;
    overflow-x:hidden;
    overflow-y:auto;
  }

  body{
    overflow:hidden;
  }

  .topbar{
    height:auto;
    min-height:64px;
    align-items:flex-start;
    gap:8px;
    flex-direction:column;
    padding:12px 14px;
  }

  .topbar h1{
    white-space:normal;
    font-size:18px;
  }

  .brand{
    font-size:12px;
  }

  .layout{
    grid-template-columns:1fr;
    height:calc(100vh - 64px);
    min-width:0;
    max-width:100%;
  }

  .side-nav{
    position:sticky;
    top:0;
    height:auto;
    display:flex;
    gap:8px;
    overflow-x:auto;
    overflow-y:hidden;
    border-right:0;
    border-bottom:1px solid #cbd8e8;
    padding:10px;
    background:#f9fcff;
    max-width:100%;
  }

  .side-nav h3{
    display:none;
  }

  .nav-btn{
    white-space:nowrap;
    margin:0;
    flex:0 0 auto;
  }

  .content{
    padding:16px;
    padding-top:24px;
    max-width:100%;
    width:100%;
    overflow-y:auto;
    overflow-x:hidden;
  }

  .hero-card,
  .section-card{
    padding:20px;
    max-width:100%;
    width:100%;
  }

  .hero-grid,
  .two-col,
  .concept-grid,
  .planning-grid,
  .toolbox-grid,
  .step-card,
  .image-pair{
    grid-template-columns:1fr;
  }

  .hero-card h2,
  .section-card h2{
    font-size:26px;
  }

@media (max-width: 720px) {
  section[id] {
    scroll-margin-top: 12px;
  }
}

  .wireframe-figure img{
    max-width:190px;
  }

  .image-pair .compact-figure:not(.wireframe-figure) img{
    max-width:280px;
  }

  .step-card figure{
    position:static;
  }

  .step-card img{
    max-width:300px;
  }

  .hierarchy-box,
  .hierarchy-box pre{
    max-width:100%;
    overflow-x:auto;
  }

.exercises-interface .exercise-showcase{
  display:flex;
  overflow-x:auto;
  overflow-y:hidden;
  gap:10px;
  padding-bottom:6px;
  max-width:100%;

  -webkit-overflow-scrolling:touch;
  scroll-snap-type:x proximity;
  touch-action:pan-y;

  scrollbar-width:auto;
}

.exercises-interface .exercise-showcase::-webkit-scrollbar{
  height:10px;
}

.exercises-interface .exercise-showcase::-webkit-scrollbar-thumb{
  background:#1f6ed4;
  border-radius:999px;
}

  .exercise-tab{
    min-width:170px;
    flex:0 0 auto;
    scroll-snap-align:start;
    touch-action:pan-x;
    -webkit-tap-highlight-color:transparent;
  }

  .exercise-tab img{
    height:110px;
    pointer-events:none;
  }

  .exercise-detail{
    grid-template-columns:1fr;
    max-width:100%;
    touch-action:pan-y;
  }

  .exercise-detail figure,
  .exercise-detail figure img{
    pointer-events:none;
  }

  .exercise-steps{
    grid-template-columns:1fr;
  }
}