@import url('https://fonts.googleapis.com/css2?family=Baloo+2:wght@500;700;800&family=Nunito:wght@400;600;700;800&display=swap');

:root{
  --paper:#FBF7EE;
  --ink:#26324A;
  --chalk-green:#2E9E6D;
  --chalk-yellow:#F4B740;
  --chalk-red:#E4572E;
  --chalk-blue:#3C6FE0;
  --line:#D8CFB8;
  --card:#FFFFFF;
}
*{box-sizing:border-box; margin:0; padding:0;}
body{
  background:var(--paper);
  color:var(--ink);
  font-family:'Nunito',sans-serif;
  background-image:linear-gradient(var(--line) 1px, transparent 1px);
  background-size:100% 42px;
  background-position:0 90px;
  min-height:100vh;
}
a{ color:inherit; text-decoration:none; }

/* Header */
header{
  background:var(--paper);
  padding:20px 20px 14px;
  text-align:center;
  border-bottom:3px dashed var(--line);
  background-image:none;
}
.logo{
  font-family:'Baloo 2',sans-serif;
  font-weight:800;
  font-size:2rem;
  color:var(--ink);
  display:inline-flex;
  align-items:center;
  gap:6px;
}
.logo .dot{ color:var(--chalk-red); }
.tagline{ font-size:0.9rem; color:#5B6584; font-weight:600; margin-top:4px; }
nav{
  display:flex; justify-content:center; gap:8px; flex-wrap:wrap; margin-top:14px;
}
nav a button, nav button{
  font-family:'Baloo 2',sans-serif; font-weight:700; font-size:0.88rem;
  padding:8px 16px; border-radius:100px; border:2px solid var(--ink);
  background:var(--card); cursor:pointer; transition:transform 0.15s;
}
nav a button:hover, nav button:hover{ transform:translateY(-2px); }
nav a button.active, nav button.active{ background:var(--ink); color:var(--paper); }

/* Grade bar */
.grade-bar{
  display:flex; align-items:center; justify-content:center; gap:8px;
  flex-wrap:wrap; padding:12px 20px; background:var(--card);
  border-bottom:3px dashed var(--line);
}
.grade-label{ font-family:'Baloo 2',sans-serif; font-weight:700; color:#5B6584; font-size:0.9rem; }
.grade-chips{ display:flex; gap:6px; flex-wrap:wrap; justify-content:center; }
.grade-chip{
  font-family:'Nunito',sans-serif; font-weight:800; font-size:0.82rem;
  width:32px; height:32px; border-radius:50%; border:2px solid var(--ink);
  background:var(--paper); cursor:pointer; display:flex; align-items:center; justify-content:center;
  transition:background 0.15s;
}
.grade-chip[data-grade="all"]{ width:auto; border-radius:100px; padding:0 12px; }
.grade-chip.active, .grade-chip:hover{ background:var(--chalk-blue); color:white; border-color:var(--chalk-blue); }

/* Main */
main{ max-width:960px; margin:0 auto; padding:28px 20px 60px; }

/* Breadcrumb */
.breadcrumb{
  font-size:0.8rem; font-weight:700; color:#8A93AC; margin-bottom:20px;
  display:flex; gap:6px; align-items:center; flex-wrap:wrap;
}
.breadcrumb a{ color:var(--chalk-blue); }
.breadcrumb span{ color:#8A93AC; }

/* Hero */
.hero{ text-align:center; padding:16px 10px 32px; }
.hero h1{
  font-family:'Baloo 2',sans-serif;
  font-size:clamp(1.6rem,5vw,2.4rem);
  line-height:1.15; margin-bottom:10px;
}
.hero h1 .underline{
  position:relative; display:inline-block;
}
.hero h1 .underline::after{
  content:""; position:absolute; left:0; right:0; bottom:-4px;
  height:9px; background:var(--chalk-yellow); z-index:-1; opacity:0.6; border-radius:6px;
}
.hero p{ color:#5B6584; font-weight:600; font-size:1rem; }

/* Cards grid */
.grid{
  display:grid; grid-template-columns:repeat(auto-fit,minmax(230px,1fr)); gap:20px; margin-top:10px;
}
.card{
  background:var(--card); border:2px solid var(--ink); border-radius:16px;
  padding:20px; box-shadow:5px 5px 0 var(--line); cursor:pointer;
  transition:transform 0.15s, box-shadow 0.15s; position:relative; display:block;
}
.card:hover{ transform:translate(-2px,-2px); box-shadow:8px 8px 0 var(--line); }
.card .icon{ font-size:2rem; margin-bottom:8px; display:block; }
.card h2{ font-family:'Baloo 2',sans-serif; font-size:1.15rem; margin-bottom:4px; }
.card p{ color:#5B6584; font-size:0.88rem; font-weight:600; }
.card .grade-range{ font-size:0.75rem; color:#8A93AC; margin-top:6px; }

/* Badge */
.badge{
  position:absolute; top:14px; right:14px; font-size:0.68rem; font-weight:800;
  padding:3px 9px; border-radius:100px; text-transform:uppercase; letter-spacing:0.5px;
}
.badge.math{ background:#DFF3E8; color:#2E9E6D; }
.badge.spelling{ background:#FDEBD8; color:#B9660A; }
.badge.science{ background:#DCE6FB; color:#3C6FE0; }
.badge.olympiad{ background:#F3DCEB; color:#A32D7E; }
.badge.spellingbee{ background:#FFE8D1; color:#C4600A; }
.badge.mentalmath{ background:#DDF2E4; color:#177A4C; }

/* Section title */
.section-title{
  font-family:'Baloo 2',sans-serif; font-size:1.4rem; margin:40px 0 16px;
  display:flex; align-items:center; gap:10px;
}
.section-title::before{
  content:""; width:9px; height:9px; background:var(--chalk-red);
  border-radius:50%; display:inline-block;
}

/* Grade hub grid */
.grade-hub-grid{
  display:grid; grid-template-columns:repeat(auto-fit,minmax(130px,1fr)); gap:12px; margin-top:10px;
}
.grade-hub-card{
  background:var(--card); border:2px solid var(--ink); border-radius:14px;
  padding:14px 10px; text-align:center; box-shadow:4px 4px 0 var(--line);
  transition:transform 0.15s, box-shadow 0.15s; display:block;
}
.grade-hub-card:hover{ transform:translate(-2px,-2px); box-shadow:6px 6px 0 var(--line); }
.grade-hub-card .g-num{
  font-family:'Baloo 2',sans-serif; font-size:1.8rem; font-weight:800; color:var(--chalk-blue);
}
.grade-hub-card .g-label{ font-size:0.78rem; font-weight:700; color:#5B6584; }

/* Game box */
.game-wrap{ max-width:520px; margin:0 auto; }
.game-box{
  background:var(--card); border:2px solid var(--ink); border-radius:20px;
  padding:28px; box-shadow:8px 8px 0 var(--line); text-align:center;
}
.game-box h1{
  font-family:'Baloo 2',sans-serif; font-size:1.5rem; margin-bottom:6px;
}
.grade-tag{
  display:inline-block; font-family:'Baloo 2',sans-serif; font-weight:700;
  font-size:0.78rem; padding:4px 14px; border-radius:100px;
  background:#EFEAD8; color:#5B6584; margin-bottom:10px;
}
.stats{
  display:flex; justify-content:center; gap:24px;
  font-weight:800; font-family:'Baloo 2',sans-serif; margin-bottom:8px;
}
.stats .score{ color:var(--chalk-green); }
.stats .streak{ color:var(--chalk-red); }
#question{
  font-size:1.45rem; font-weight:800; margin:16px 0; min-height:2em; line-height:1.3;
}
#mm-question, #oly-question, #sci-question{
  font-size:1.1rem; font-weight:700; margin:16px 0; min-height:3em; line-height:1.4;
}
.answers{
  display:grid; grid-template-columns:1fr 1fr; gap:12px; max-width:400px; margin:0 auto;
}
.answers button{
  font-family:'Nunito',sans-serif; font-weight:700; font-size:1rem;
  padding:14px; border-radius:12px; border:2px solid var(--ink);
  background:var(--paper); cursor:pointer; transition:background 0.15s;
}
.answers button:hover{ background:var(--chalk-yellow); }
.answers button.correct{ background:var(--chalk-green); color:white; border-color:var(--chalk-green); }
.answers button.wrong{ background:var(--chalk-red); color:white; border-color:var(--chalk-red); }
.feedback{ min-height:1.5em; font-weight:800; font-size:1rem; margin-top:12px; }
.speak-btn{
  font-family:'Baloo 2',sans-serif; font-weight:700; font-size:0.9rem;
  padding:9px 18px; border-radius:100px; border:2px solid var(--chalk-blue);
  background:#EAF1FF; color:var(--chalk-blue); cursor:pointer; margin:8px 0;
}
.text-input{
  font-family:'Nunito',sans-serif; font-size:1.05rem; padding:11px 14px;
  border-radius:12px; border:2px solid var(--ink); text-align:center; width:210px; margin-top:10px;
}
.submit-btn{
  font-family:'Baloo 2',sans-serif; font-weight:700; font-size:0.95rem;
  padding:10px 24px; border-radius:100px; border:2px solid var(--ink);
  background:var(--card); cursor:pointer; margin-top:14px;
  display:block; margin:14px auto 0;
}
.back-link{
  display:inline-block; font-family:'Baloo 2',sans-serif; font-weight:700;
  font-size:0.9rem; padding:8px 16px; border-radius:100px; border:2px solid var(--ink);
  background:var(--card); cursor:pointer; margin-bottom:18px; transition:background 0.15s;
}
.back-link:hover{ background:var(--chalk-yellow); }

/* Other subjects strip */
.other-subjects{ margin-top:32px; }
.other-subjects h3{
  font-family:'Baloo 2',sans-serif; font-size:1.1rem; margin-bottom:12px; color:#5B6584;
}
.subject-strip{
  display:flex; gap:10px; flex-wrap:wrap;
}
.subject-pill{
  font-family:'Nunito',sans-serif; font-weight:700; font-size:0.85rem;
  padding:8px 16px; border-radius:100px; border:2px solid var(--ink);
  background:var(--card); transition:background 0.15s;
}
.subject-pill:hover{ background:var(--chalk-yellow); }

/* Blog */
.blog-grid{
  display:grid; grid-template-columns:repeat(auto-fit,minmax(260px,1fr)); gap:20px;
}
.blog-card{
  background:var(--card); border:2px solid var(--ink); border-radius:16px;
  padding:20px; box-shadow:5px 5px 0 var(--line);
}
.blog-card .blog-tag{
  font-size:0.72rem; font-weight:800; text-transform:uppercase; letter-spacing:0.5px;
  color:var(--chalk-blue); margin-bottom:8px; display:block;
}
.blog-card h3{ font-family:'Baloo 2',sans-serif; font-size:1.05rem; margin-bottom:6px; }
.blog-card p{ color:#5B6584; font-size:0.85rem; font-weight:600; line-height:1.4; }
.blog-empty{
  text-align:center; padding:50px 20px;
  color:#8A93AC; font-weight:700; font-size:1rem;
  border:2px dashed var(--line); border-radius:16px;
}

/* Help card */
.help-section{ margin-top:50px; }
.help-card{
  background:var(--card); border:2px solid var(--ink); border-radius:16px;
  padding:18px 20px; box-shadow:5px 5px 0 var(--line);
}
.help-icon{ font-size:1.5rem; display:block; margin-bottom:8px; }
.help-card h4{ font-family:'Baloo 2',sans-serif; font-size:1rem; margin-bottom:6px; }
.help-card p{ color:#5B6584; font-size:0.88rem; font-weight:600; line-height:1.4; }

/* Footer */
footer{
  text-align:center; padding:28px 20px;
  color:#8A93AC; font-size:0.82rem; font-weight:600;
  border-top:3px dashed var(--line);
}
footer a{ color:var(--chalk-blue); }