:root{--bg: #EDFAFA;--bg-deep: #DDF4F5;--surface: #FFFFFF;--surface-2: #F2FBFC;--ink: #06333F;--ink-soft: #3E6B77;--line: #CBE9EC;--lagoon: #0FB5BA;--lagoon-deep: #077F8C;--aqua: #22D3EE;--coral: #FF6B5E;--sun: #FFD166;--seagrass: #2EC486;--pearl: #E8FBFF;--radius: 20px;--radius-sm: 12px;--shadow: 0 6px 24px rgba(6, 51, 63, .1);--shadow-lift: 0 12px 32px rgba(6, 51, 63, .16);--font-display: "Baloo 2", "Noto Sans Thaana", cursive;--font-body: "Nunito", "Noto Sans Thaana", sans-serif;--nav-h: 68px}[data-theme=dark]{--bg: #03222E;--bg-deep: #021822;--surface: #073444;--surface-2: #0A3E50;--ink: #E8FBFF;--ink-soft: #8FC3CE;--line: #0F4A5D;--pearl: #0A3E50;--shadow: 0 6px 24px rgba(0, 0, 0, .35);--shadow-lift: 0 12px 32px rgba(0, 0, 0, .45)}*{box-sizing:border-box;margin:0;padding:0}html,body{height:100%}body{font-family:var(--font-body);background:var(--bg);color:var(--ink);-webkit-font-smoothing:antialiased;overscroll-behavior-y:none;transition:background .3s ease,color .3s ease}[dir=rtl]{font-family:"Noto Sans Thaana",var(--font-body)}h1,h2,h3,.display{font-family:var(--font-display);letter-spacing:-.01em}button{font-family:inherit;cursor:pointer;border:none}input,select,textarea{font-family:inherit}a{color:inherit;text-decoration:none}.app-shell{min-height:100dvh;padding-bottom:calc(var(--nav-h) + env(safe-area-inset-bottom) + 12px)}.page{max-width:640px;margin:0 auto;padding:20px 18px 32px;animation:pageIn .35s ease both}@keyframes pageIn{0%{opacity:0;transform:translateY(10px)}to{opacity:1;transform:none}}.page-wide{max-width:1024px}.ocean-bg{position:fixed;top:0;right:0;bottom:0;left:0;z-index:-1;overflow:hidden;background:radial-gradient(1200px 500px at 80% -10%,rgba(34,211,238,.18),transparent 60%),radial-gradient(900px 420px at 10% 110%,rgba(15,181,186,.16),transparent 60%),var(--bg)}.ocean-bg .bubble{position:absolute;border-radius:50%;background:radial-gradient(circle at 30% 30%,#ffffff80,#ffffff0f);animation:rise linear infinite;opacity:.5}@keyframes rise{0%{transform:translateY(110vh) scale(.8)}to{transform:translateY(-15vh) scale(1.1)}}.card{background:var(--surface);border-radius:var(--radius);box-shadow:var(--shadow);padding:18px;border:1px solid var(--line)}.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;font-family:var(--font-display);font-weight:700;font-size:16px;padding:14px 22px;border-radius:999px;transition:transform .15s ease,box-shadow .15s ease,filter .15s ease;-webkit-user-select:none;user-select:none}.btn:active{transform:scale(.96)}.btn:disabled{opacity:.55;cursor:not-allowed}.btn-primary{background:linear-gradient(135deg,var(--lagoon),var(--lagoon-deep));color:#fff;box-shadow:0 6px 18px #0fb5ba66}.btn-primary:hover{filter:brightness(1.06);box-shadow:var(--shadow-lift)}.btn-coral{background:linear-gradient(135deg,#FF8A76,var(--coral));color:#fff;box-shadow:0 6px 18px #ff6b5e66}.btn-ghost{background:var(--surface-2);color:var(--ink);border:1.5px solid var(--line)}.btn-block{width:100%}.field{margin-bottom:16px}.field label{display:block;font-weight:700;font-size:14px;margin-bottom:6px;color:var(--ink-soft)}.field input,.field select{width:100%;padding:14px 16px;border-radius:var(--radius-sm);border:1.5px solid var(--line);background:var(--surface);color:var(--ink);font-size:16px;transition:border-color .15s ease,box-shadow .15s ease}.field input:focus,.field select:focus{outline:none;border-color:var(--lagoon);box-shadow:0 0 0 4px #0fb5ba26}.error-msg{background:#ff6b5e1f;color:var(--coral);border:1px solid rgba(255,107,94,.3);border-radius:var(--radius-sm);padding:12px 14px;font-size:14px;font-weight:600;margin-bottom:14px}.ok-msg{background:#2ec4861f;color:var(--seagrass);border:1px solid rgba(46,196,134,.3);border-radius:var(--radius-sm);padding:12px 14px;font-size:14px;font-weight:700;margin-bottom:14px}.bottom-nav{position:fixed;left:0;right:0;bottom:0;z-index:50;height:calc(var(--nav-h) + env(safe-area-inset-bottom));padding-bottom:env(safe-area-inset-bottom);background:var(--surface);border-top:1px solid var(--line);display:flex;justify-content:space-around;align-items:center;box-shadow:0 -6px 24px #06333f14}.nav-item{display:flex;flex-direction:column;align-items:center;gap:2px;font-size:11px;font-weight:800;color:var(--ink-soft);padding:6px 10px;border-radius:14px;transition:color .15s ease,transform .15s ease;min-width:58px}.nav-item .nav-icon{font-size:22px;line-height:1;transition:transform .2s ease}.nav-item.active{color:var(--lagoon-deep)}[data-theme=dark] .nav-item.active{color:var(--aqua)}.nav-item.active .nav-icon{transform:translateY(-2px) scale(1.15)}.nav-item:active{transform:scale(.92)}.top-bar{display:flex;align-items:center;justify-content:space-between;margin-bottom:18px}.top-bar h1{font-size:26px}.chip{display:inline-flex;align-items:center;gap:6px;background:var(--surface);border:1px solid var(--line);border-radius:999px;padding:6px 12px;font-weight:800;font-size:13px;box-shadow:var(--shadow)}.grid-2{display:grid;grid-template-columns:1fr 1fr;gap:14px}.stack{display:flex;flex-direction:column;gap:14px}.row{display:flex;align-items:center;gap:10px}.spread{display:flex;align-items:center;justify-content:space-between}.muted{color:var(--ink-soft)}.small{font-size:13px}.spinner{width:42px;height:42px;border-radius:50%;border:4px solid var(--line);border-top-color:var(--lagoon);animation:spin .8s linear infinite;margin:60px auto}@keyframes spin{to{transform:rotate(360deg)}}.subject-tile{display:flex;flex-direction:column;align-items:flex-start;gap:8px;padding:18px 16px;border-radius:var(--radius);background:var(--surface);border:1px solid var(--line);box-shadow:var(--shadow);transition:transform .15s ease,box-shadow .15s ease;position:relative;overflow:hidden}.subject-tile:hover{transform:translateY(-3px);box-shadow:var(--shadow-lift)}.subject-tile .tile-emoji{font-size:30px}.subject-tile .tile-accent{position:absolute;top:0;left:0;right:0;height:5px}.wave-divider{height:26px;opacity:.6;margin:6px 0}.kg-tile{display:flex;flex-direction:column;align-items:center;justify-content:center;gap:6px;padding:22px 12px;border-radius:24px;border:none;color:#fff;font-family:var(--font-display);font-weight:800;font-size:17px;box-shadow:var(--shadow-lift);transition:transform .15s ease;text-align:center}.kg-tile:active{transform:scale(.94)}.kg-tile .kg-emoji{font-size:44px;animation:kgFloat 2.6s ease-in-out infinite alternate}@keyframes kgFloat{0%{transform:translateY(0) rotate(-3deg)}to{transform:translateY(-7px) rotate(3deg)}}.trace-cell{aspect-ratio:1;display:grid;place-items:center;border-radius:18px;background:var(--surface);border:2px solid var(--line);font-family:var(--font-display);font-size:30px;font-weight:800;color:var(--ink);box-shadow:var(--shadow);position:relative;transition:transform .12s ease}.trace-cell:active{transform:scale(.92)}.trace-cell .trace-done{position:absolute;top:-6px;right:-6px;font-size:18px}