/* Shared styles for kid + parent shells */
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;700;800&family=Fredoka:wght@500;600;700&display=swap');
*{box-sizing:border-box;margin:0;padding:0}
:root{
  --bg:#fef3f8; --surface:#fff; --surface-2:#fdf4ff;
  --border:#fbcfe8; --text:#1e1b4b; --text-2:#64748b;
  --primary:#a855f7; --primary-h:#9333ea;
  --pink:#ec4899; --orange:#fb923c; --green:#10b981; --blue:#3b82f6;
  --warn:#f59e0b; --error:#ef4444;
  --r:14px; --r-sm:8px;
  --shadow:0 4px 12px rgba(168,85,247,.15);
  --shadow-lg:0 20px 40px rgba(168,85,247,.2);
}
body{font-family:Inter,system-ui,sans-serif;background:var(--bg);color:var(--text);min-height:100vh;font-size:14px;line-height:1.5}
a{color:inherit;text-decoration:none}
button,input,select,textarea{font:inherit}

/* Topbar */
.topbar{background:var(--surface);border-bottom:1px solid var(--border);padding:12px 24px;display:flex;justify-content:space-between;align-items:center;box-shadow:var(--shadow)}
.brand{display:flex;align-items:center;gap:10px;font-weight:700}
.brand .lg{font-size:24px}

/* Buttons */
.btn{padding:10px 20px;border-radius:var(--r-sm);border:none;font-size:14px;font-weight:600;cursor:pointer;display:inline-flex;align-items:center;gap:6px;transition:all .15s}
.btn-primary{background:var(--primary);color:#fff}
.btn-primary:hover{background:var(--primary-h);transform:translateY(-1px);box-shadow:var(--shadow)}
.btn-success{background:var(--green);color:#fff}
.btn-ghost{background:var(--surface);color:var(--text);border:1px solid var(--border)}
.btn-ghost:hover{background:var(--surface-2)}
.btn-danger{background:#fee2e2;color:var(--error);border:1px solid #fecaca}
.btn-lg{padding:14px 32px;font-size:16px}
.btn-sm{padding:6px 12px;font-size:12px}
.btn-block{width:100%;justify-content:center}
.btn:disabled{opacity:.5;cursor:not-allowed}

/* Cards */
.card{background:var(--surface);border-radius:var(--r);padding:20px;box-shadow:var(--shadow)}

/* Form */
.field{margin-bottom:14px}
.field label{display:block;font-size:12px;font-weight:600;text-transform:uppercase;letter-spacing:.3px;color:var(--text-2);margin-bottom:6px}
.field input,.field select,.field textarea{width:100%;padding:10px;border:1px solid var(--border);border-radius:var(--r-sm);font-size:14px;outline:none}
.field input:focus,.field select:focus,.field textarea:focus{border-color:var(--primary)}

/* Auth screens */
.auth-wrap{min-height:calc(100vh - 60px);display:grid;place-items:center;padding:24px}
.auth-box{max-width:420px;width:100%;background:var(--surface);border-radius:var(--r);padding:32px;box-shadow:var(--shadow-lg)}
.auth-box h2{font-family:Fredoka,sans-serif;margin-bottom:20px}
.auth-tabs{display:flex;gap:6px;margin-bottom:20px;background:var(--surface-2);padding:4px;border-radius:var(--r-sm)}
.auth-tabs .tab{flex:1;padding:8px;text-align:center;border-radius:6px;cursor:pointer;font-weight:600;font-size:13px;color:var(--text-2)}
.auth-tabs .tab.sel{background:var(--surface);color:var(--text);box-shadow:var(--shadow)}
.auth-toggle{text-align:center;margin-top:16px;color:var(--text-2);font-size:13px}
.auth-toggle button{background:none;border:0;color:var(--primary);cursor:pointer;text-decoration:underline;font-weight:600}

/* Toast */
#toast-root{position:fixed;top:20px;right:20px;z-index:2000;display:flex;flex-direction:column;gap:8px}
.toast{background:var(--surface);border-radius:var(--r-sm);padding:12px 16px;min-width:240px;max-width:340px;box-shadow:var(--shadow-lg);font-size:13px;animation:slideIn .25s}
.toast.success{border-left:4px solid var(--green)}
.toast.error{border-left:4px solid var(--error)}
.toast.warn{border-left:4px solid var(--warn)}
@keyframes slideIn{from{opacity:0;transform:translateX(20px)}to{opacity:1;transform:translateX(0)}}

/* Empty + spinner */
.empty{padding:32px;text-align:center;color:var(--text-2)}
.empty .ic{font-size:36px;margin-bottom:8px;opacity:.6}
.spinner{width:16px;height:16px;border:2px solid rgba(255,255,255,.3);border-top-color:currentColor;border-radius:50%;animation:spin .7s linear infinite;display:inline-block;vertical-align:middle}
@keyframes spin{to{transform:rotate(360deg)}}

.err{padding:10px 14px;background:#fee2e2;border:1px solid #fecaca;border-radius:var(--r-sm);color:var(--error);font-size:13px;margin-top:10px}

/* Modal */
.modal-overlay{position:fixed;inset:0;background:rgba(30,27,75,.5);backdrop-filter:blur(4px);display:flex;align-items:center;justify-content:center;z-index:1000;padding:20px}
.modal{background:var(--surface);border-radius:var(--r);width:100%;max-width:480px;padding:24px;box-shadow:var(--shadow-lg);max-height:90vh;overflow-y:auto}
.modal h2{margin-bottom:16px;font-family:Fredoka,sans-serif}
.modal .foot{display:flex;gap:8px;margin-top:20px}

.avatar-pick{display:flex;gap:8px;flex-wrap:wrap}
.avatar-pick .av{width:48px;height:48px;border-radius:50%;background:var(--surface-2);display:flex;align-items:center;justify-content:center;font-size:24px;cursor:pointer;border:2px solid transparent}
.avatar-pick .av.sel{border-color:var(--primary);background:#fce7f3}

/* Kid UI */
.kid-app{max-width:480px;margin:0 auto;padding:16px}
.kid-header{background:linear-gradient(135deg,var(--primary),var(--pink));color:#fff;border-radius:var(--r);padding:20px;margin-bottom:16px;box-shadow:var(--shadow-lg)}
.kid-greet{font-family:Fredoka,sans-serif;font-size:24px;font-weight:600}
.kid-stats{display:flex;gap:12px;margin-top:12px}
.stat-box{flex:1;background:rgba(255,255,255,.2);border-radius:var(--r-sm);padding:10px;text-align:center;backdrop-filter:blur(10px)}
.stat-box .num{font-size:24px;font-weight:700}
.stat-box .lbl{font-size:11px;opacity:.9;text-transform:uppercase;letter-spacing:.5px}

.action-card{background:var(--surface);border-radius:var(--r);padding:20px;margin-bottom:12px;box-shadow:var(--shadow);cursor:pointer;border:2px solid transparent;transition:all .15s}
.action-card:hover{border-color:var(--primary);transform:translateY(-2px)}
.action-card.big{padding:32px 20px;text-align:center}
.action-card .ic{font-size:48px;margin-bottom:8px}
.action-card .title{font-weight:700;font-size:16px;margin-bottom:4px}
.action-card .desc{color:var(--text-2);font-size:12px}

.upload-zone{border:3px dashed var(--primary);border-radius:var(--r);padding:32px;text-align:center;background:var(--surface-2);cursor:pointer}
.upload-zone:hover{border-color:var(--pink);background:#fce7f3}
.upload-zone .ic{font-size:48px;color:var(--primary)}

.chat{background:var(--surface);border-radius:var(--r);padding:16px;margin-bottom:12px;box-shadow:var(--shadow);max-height:60vh;overflow-y:auto}
.msg{padding:12px 14px;border-radius:var(--r-sm);margin-bottom:8px;max-width:85%;line-height:1.5}
.msg.tutor{background:var(--surface-2);border:1px solid var(--border)}
.msg.student{background:var(--primary);color:#fff;margin-left:auto}
.msg .role{font-size:10px;text-transform:uppercase;letter-spacing:.5px;opacity:.7;margin-bottom:4px}

.chat-input{display:flex;gap:8px;padding:12px;background:var(--surface);border-radius:var(--r);box-shadow:var(--shadow)}
.chat-input input{flex:1;border:1px solid var(--border);border-radius:var(--r-sm);padding:10px;outline:none}
.chat-input input:focus{border-color:var(--primary)}

.reward-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(140px,1fr));gap:12px}
.reward-card{background:var(--surface);border-radius:var(--r);padding:14px;box-shadow:var(--shadow);text-align:center;cursor:pointer;border:2px solid transparent}
.reward-card:hover{border-color:var(--primary);transform:translateY(-2px)}
.reward-card.locked{opacity:.5;cursor:not-allowed}
.reward-card .ic{font-size:32px;margin-bottom:6px}
.reward-card .title{font-size:12px;font-weight:600;margin-bottom:4px}
.reward-card .cost{color:var(--primary);font-weight:700;font-size:14px}

.badge-row{display:flex;gap:8px;flex-wrap:wrap;margin-top:8px}
.badge-pill{background:linear-gradient(135deg,var(--orange),var(--pink));color:#fff;padding:4px 10px;border-radius:99px;font-size:11px;font-weight:600;display:inline-flex;align-items:center;gap:4px}

/* Parent UI */
.parent-app{max-width:1200px;margin:0 auto;padding:24px}
.parent-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(300px,1fr));gap:16px;margin-bottom:24px}
.kid-card{background:var(--surface);border-radius:var(--r);padding:20px;box-shadow:var(--shadow)}
.kid-card-head{display:flex;align-items:center;gap:12px;margin-bottom:14px}
.kid-avatar{width:48px;height:48px;background:linear-gradient(135deg,var(--primary),var(--pink));border-radius:50%;display:flex;align-items:center;justify-content:center;font-size:24px}
.kid-card-name{font-weight:700;font-size:16px}
.kid-card-grade{color:var(--text-2);font-size:12px}
.kid-card-pin{font-family:'JetBrains Mono',monospace;background:var(--surface-2);padding:2px 8px;border-radius:6px;font-size:11px;color:var(--primary);margin-top:4px;display:inline-block}

.metric-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:8px;margin-bottom:12px}
.metric{background:var(--surface-2);border-radius:var(--r-sm);padding:10px}
.metric .v{font-size:20px;font-weight:700;color:var(--primary)}
.metric .l{font-size:11px;color:var(--text-2);text-transform:uppercase}

.section{background:var(--surface);border-radius:var(--r);padding:20px;margin-bottom:16px;box-shadow:var(--shadow)}
.section h2{font-size:16px;font-weight:700;margin-bottom:12px;display:flex;align-items:center;gap:8px}

.pending-item{display:flex;align-items:center;gap:12px;padding:12px;background:var(--surface-2);border-radius:var(--r-sm);margin-bottom:8px}
.pending-item .info{flex:1}
.pending-item .name{font-weight:600;font-size:14px}
.pending-item .detail{font-size:12px;color:var(--text-2)}

@media(max-width:600px){
  .kid-app{padding:12px}
  .parent-app{padding:16px}
}