*{margin:0;padding:0;box-sizing:border-box}
:root{--bg:#ffffff;--bg2:#f5f6fa;--bg3:#eef0f7;--card:#ffffff;--primary:#6c5ce7;--accent:#8b7cf7;--green:#00b894;--red:#e74c3c;--yellow:#f39c12;--blue:#0984e3;--text:#2d3436;--text2:#636e72;--border:#e0e3eb;--radius:16px;--shadow:0 2px 12px rgba(0,0,0,.06);--glow:0 4px 20px rgba(108,92,231,.12)}
body{font-family:'IBM Plex Sans Thai',sans-serif;background:var(--bg2);color:var(--text);min-height:100vh;overflow-x:hidden}
canvas#particles-canvas{position:fixed;top:0;left:0;width:100%;height:100%;z-index:0;pointer-events:none}
#main-nav{position:fixed;top:0;left:0;right:0;z-index:100;display:flex;align-items:center;justify-content:space-between;padding:0 2rem;height:64px;background:rgba(255,255,255,.9);backdrop-filter:blur(20px);border-bottom:1px solid var(--border);box-shadow:0 1px 8px rgba(0,0,0,.04)}
.nav-brand{display:flex;align-items:center;gap:.5rem;font-family:'Orbitron',sans-serif;font-size:1.2rem;font-weight:700;color:var(--primary)}
.nav-brand i{font-size:1.4rem}
.accent{color:var(--accent)}
.nav-links{display:flex;gap:.25rem}
.nav-btn{background:none;border:none;color:var(--text2);padding:.5rem 1rem;border-radius:10px;cursor:pointer;display:flex;align-items:center;gap:.4rem;font-size:.85rem;font-family:inherit;transition:.3s}
.nav-btn:hover,.nav-btn.active{color:var(--primary);background:rgba(108,92,231,.08)}
.nav-btn.active{font-weight:600}
.nav-user{display:flex;align-items:center;gap:.75rem}
.xp-bar-mini{width:80px;height:6px;background:var(--bg3);border-radius:3px;overflow:hidden}
.xp-fill-mini{height:100%;background:linear-gradient(90deg,var(--primary),var(--accent));border-radius:3px;transition:width .5s;width:0}
.level-badge{background:linear-gradient(135deg,var(--primary),var(--accent));padding:.2rem .6rem;border-radius:20px;font-size:.75rem;font-weight:700;font-family:'Orbitron',sans-serif;color:#fff}
.page{display:none;position:relative;z-index:1;padding:80px 2rem 2rem;max-width:1200px;margin:0 auto;min-height:100vh}
.page.active{display:block;animation:fadeIn .4s}
@keyframes fadeIn{from{opacity:0;transform:translateY(10px)}to{opacity:1;transform:translateY(0)}}
.page-header{text-align:center;margin-bottom:2.5rem}
.page-header h1{font-family:'Orbitron',sans-serif;font-size:2rem;margin-bottom:.5rem;color:var(--primary)}
.page-header p{color:var(--text2);font-size:1rem}
.hidden{display:none!important}
.hero{display:grid;grid-template-columns:1.2fr 1fr;align-items:center;gap:3rem;min-height:calc(100vh - 120px);padding:2rem 0}
.hero-badge{display:inline-flex;align-items:center;gap:.5rem;background:rgba(108,92,231,.08);border:1px solid rgba(108,92,231,.2);padding:.4rem 1rem;border-radius:30px;font-size:.85rem;color:var(--primary);margin-bottom:1.5rem}
.hero-title{font-family:'Orbitron',sans-serif;font-size:2.8rem;line-height:1.3;margin-bottom:1.2rem;color:var(--text)}
.gradient-text{background:linear-gradient(135deg,#6c5ce7,#a29bfe,#74b9ff);-webkit-background-clip:text;-webkit-text-fill-color:transparent}
.hero-subtitle{color:var(--text2);font-size:1.05rem;line-height:1.7;margin-bottom:2rem;max-width:500px}
.hero-actions{display:flex;gap:1rem;margin-bottom:2.5rem}
.btn{display:inline-flex;align-items:center;gap:.5rem;padding:.7rem 1.5rem;border-radius:12px;border:none;cursor:pointer;font-family:inherit;font-size:.9rem;font-weight:600;transition:.3s}
.btn-primary{background:linear-gradient(135deg,var(--primary),#8b7cf7);color:#fff;box-shadow:var(--glow)}
.btn-primary:hover{transform:translateY(-2px);box-shadow:0 8px 30px rgba(108,92,231,.25)}
.btn-secondary{background:rgba(108,92,231,.08);color:var(--primary);border:1px solid rgba(108,92,231,.2)}
.btn-secondary:hover{background:rgba(108,92,231,.15);transform:translateY(-2px)}
.btn-ghost{background:none;color:var(--text2);border:1px solid var(--border)}
.btn-ghost:hover{color:var(--primary);border-color:var(--primary)}
.btn-lg{padding:.85rem 2rem;font-size:1rem}
.btn-danger{background:rgba(231,76,60,.08);color:var(--red);border:1px solid rgba(231,76,60,.2)}
.btn-danger:hover{background:rgba(231,76,60,.15)}
.hero-stats{display:flex;gap:2.5rem}
.hero-stat-number{font-family:'Orbitron',sans-serif;font-size:1.8rem;font-weight:700;color:var(--primary);display:block}
.hero-stat-label{color:var(--text2);font-size:.85rem}
.hero-visual{display:flex;justify-content:center;align-items:center}
.keyboard-3d{display:flex;flex-direction:column;gap:12px;transform:perspective(600px) rotateX(5deg) rotateY(-5deg)}
.key-row{display:flex;gap:10px}
.key{background:#fff;border:2px solid var(--border);border-radius:12px;padding:1.2rem 1.8rem;font-family:'JetBrains Mono',monospace;font-size:1.1rem;font-weight:600;color:var(--text);box-shadow:var(--shadow);min-width:70px;text-align:center;transition:.3s}
.key-special{background:rgba(108,92,231,.06);color:var(--primary);border-color:rgba(108,92,231,.2)}
.key-windows{background:rgba(9,132,227,.06);color:var(--blue);border-color:rgba(9,132,227,.2)}
.floating-key{animation:floatKey 3s ease-in-out infinite}
@keyframes floatKey{0%,100%{transform:translateY(0)}50%{transform:translateY(-8px)}}
.features-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:1.5rem;padding:2rem 0 4rem}
.feature-card{background:var(--card);border:1px solid var(--border);border-radius:var(--radius);padding:2rem;cursor:pointer;transition:.3s;position:relative;overflow:hidden;box-shadow:var(--shadow)}
.feature-card:hover{transform:translateY(-5px);border-color:rgba(108,92,231,.3);box-shadow:var(--glow)}
.feature-icon{width:50px;height:50px;border-radius:14px;display:flex;align-items:center;justify-content:center;font-size:1.3rem;margin-bottom:1rem}
.theory-icon{background:rgba(108,92,231,.08);color:var(--primary)}
.practice-icon{background:rgba(0,184,148,.08);color:var(--green)}
.game-icon{background:rgba(9,132,227,.08);color:var(--blue)}
.feature-card h3{font-size:1.1rem;margin-bottom:.5rem}
.feature-card p{color:var(--text2);font-size:.88rem;line-height:1.6}
.feature-arrow{position:absolute;bottom:1.5rem;right:1.5rem;color:var(--primary);opacity:0;transition:.3s;transform:translateX(-5px)}
.feature-card:hover .feature-arrow{opacity:1;transform:translateX(0)}
.section-title{font-family:'Orbitron',sans-serif;font-size:1.2rem;margin-bottom:1.5rem;color:var(--primary)}
.category-tabs{display:flex;flex-wrap:wrap;gap:.5rem;margin-bottom:2rem;justify-content:center}
.cat-tab{padding:.5rem 1.2rem;border-radius:25px;border:1px solid var(--border);background:#fff;color:var(--text2);cursor:pointer;font-family:inherit;font-size:.85rem;transition:.3s;display:flex;align-items:center;gap:.4rem}
.cat-tab:hover{border-color:var(--primary);color:var(--primary)}
.cat-tab.active{background:var(--primary);border-color:var(--primary);color:#fff}
.shortcuts-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(320px,1fr));gap:1rem}
.shortcut-card{background:var(--card);border:1px solid var(--border);border-radius:var(--radius);padding:1.5rem;transition:.3s;box-shadow:var(--shadow)}
.shortcut-card:hover{border-color:rgba(108,92,231,.3);box-shadow:var(--glow)}
.shortcut-card.unsafe{opacity:.85}
.shortcut-header{display:flex;justify-content:space-between;align-items:flex-start;margin-bottom:.75rem}
.shortcut-keys{display:flex;gap:6px;flex-wrap:wrap}
.shortcut-key{background:var(--bg2);border:1px solid var(--border);border-radius:8px;padding:.3rem .7rem;font-family:'JetBrains Mono',monospace;font-size:.8rem;font-weight:600;color:var(--primary);white-space:nowrap}
.shortcut-diff{font-size:.7rem;padding:.2rem .5rem;border-radius:10px}
.diff-1{background:rgba(0,184,148,.1);color:var(--green)}
.diff-2{background:rgba(243,156,18,.1);color:var(--yellow)}
.diff-3{background:rgba(231,76,60,.1);color:var(--red)}
.badge-unsafe{font-size:.65rem;padding:.15rem .4rem;border-radius:8px;background:rgba(231,76,60,.08);color:var(--red);margin-left:.3rem}

.practice-categories{display:grid;grid-template-columns:repeat(auto-fill,minmax(250px,1fr));gap:1rem}
.practice-cat-card{background:var(--card);border:1px solid var(--border);border-radius:var(--radius);padding:1.5rem;cursor:pointer;transition:.3s;text-align:center;box-shadow:var(--shadow)}
.practice-cat-card:hover{border-color:rgba(108,92,231,.3);transform:translateY(-3px);box-shadow:var(--glow)}
.practice-cat-card .cat-icon{font-size:2rem;margin-bottom:.75rem;display:block}
.practice-cat-card h3{margin-bottom:.3rem}
.practice-cat-card p{color:var(--text2);font-size:.82rem}
.practice-header{display:flex;justify-content:space-between;align-items:center;margin-bottom:1rem}
.practice-progress-bar{height:6px;background:var(--bg3);border-radius:3px;margin-bottom:2rem;overflow:hidden}
.practice-progress-fill{height:100%;background:linear-gradient(90deg,var(--primary),var(--accent));border-radius:3px;transition:width .4s;width:0}
.practice-prompt{text-align:center;padding:3rem 1rem;background:var(--card);border-radius:var(--radius);border:1px solid var(--border);margin-bottom:2rem;box-shadow:var(--shadow)}
.prompt-description{font-size:1.3rem;font-weight:600;margin-bottom:1.5rem}
.prompt-keys{display:flex;justify-content:center;gap:10px;flex-wrap:wrap;margin-bottom:1rem}
.prompt-key{background:var(--bg2);border:2px solid rgba(108,92,231,.2);border-radius:12px;padding:.8rem 1.5rem;font-family:'JetBrains Mono',monospace;font-size:1.2rem;font-weight:700;color:var(--primary);min-width:60px;text-align:center}
.prompt-key.key-matched{border-color:var(--green);color:var(--green);background:rgba(0,184,148,.06)}
.prompt-hint{color:var(--yellow);font-size:.9rem;margin-top:1rem}
.practice-input-area{text-align:center;margin-bottom:1.5rem}
.input-display{background:var(--bg2);border:2px dashed var(--border);border-radius:var(--radius);padding:1.5rem;font-family:'JetBrains Mono',monospace;font-size:1.1rem;color:var(--text2);min-height:70px;display:flex;align-items:center;justify-content:center}
.input-display.correct{border-color:var(--green);color:var(--green);background:rgba(0,184,148,.04);animation:pulseGreen .5s}
.input-display.wrong{border-color:var(--red);color:var(--red);background:rgba(231,76,60,.04);animation:shake .4s}
@keyframes pulseGreen{0%,100%{box-shadow:none}50%{box-shadow:0 0 30px rgba(0,184,148,.15)}}
@keyframes shake{0%,100%{transform:translateX(0)}25%{transform:translateX(-8px)}75%{transform:translateX(8px)}}
.practice-feedback{font-size:.95rem;margin-top:1rem;padding:.75rem;border-radius:10px}
.feedback-correct{background:rgba(0,184,148,.06);color:var(--green)}
.feedback-wrong{background:rgba(231,76,60,.06);color:var(--red)}
.practice-actions{display:flex;justify-content:center;gap:1rem}
.practice-complete,.game-over{display:flex;align-items:center;justify-content:center;min-height:60vh}
.complete-content,.game-over-content{text-align:center;background:var(--card);border:1px solid var(--border);border-radius:var(--radius);padding:3rem;max-width:500px;width:100%;box-shadow:var(--shadow)}
.complete-icon,.game-over-title{font-size:3rem;margin-bottom:1rem;color:var(--yellow)}
.complete-content h2{font-family:'Orbitron',sans-serif;margin-bottom:1.5rem;color:var(--primary)}
.complete-stats,.game-over-stats{display:flex;justify-content:center;gap:2rem;margin-bottom:1.5rem}
.complete-stat{text-align:center}
.complete-stat-value{display:block;font-family:'Orbitron',sans-serif;font-size:2rem;font-weight:700;color:var(--primary)}
.complete-stat-label{color:var(--text2);font-size:.85rem}
.go-stat{display:flex;align-items:center;gap:.3rem;color:var(--text2);font-size:.85rem}
.go-stat i:first-child{color:var(--primary)}
.complete-xp,.game-over-xp{font-family:'Orbitron',sans-serif;font-size:1.3rem;color:var(--yellow);margin-bottom:1.5rem}
.complete-actions,.game-over-actions{display:flex;justify-content:center;gap:1rem}
.game-modes{display:grid;grid-template-columns:repeat(3,1fr);gap:1.5rem}
.game-mode-card{background:var(--card);border:1px solid var(--border);border-radius:var(--radius);padding:2rem;cursor:pointer;transition:.3s;text-align:center;box-shadow:var(--shadow)}
.game-mode-card:hover{transform:translateY(-5px);border-color:rgba(108,92,231,.3);box-shadow:var(--glow)}
.game-mode-icon{width:70px;height:70px;border-radius:20px;display:flex;align-items:center;justify-content:center;font-size:1.8rem;margin:0 auto 1rem}
.speed-icon{background:rgba(243,156,18,.08);color:var(--yellow)}
.survival-icon{background:rgba(231,76,60,.08);color:var(--red)}
.quiz-icon{background:rgba(9,132,227,.08);color:var(--blue)}
.game-mode-card h3{font-family:'Orbitron',sans-serif;margin-bottom:.5rem}
.game-mode-card p{color:var(--text2);font-size:.85rem;margin-bottom:1rem}
.game-mode-info{display:flex;justify-content:center;gap:1rem;font-size:.8rem;color:var(--text2);margin-bottom:.75rem}
.game-mode-best{font-family:'Orbitron',sans-serif;font-size:.8rem;color:var(--primary)}
.game-hud{display:flex;justify-content:space-between;align-items:center;margin-bottom:2rem}
.hud-item{font-family:'Orbitron',sans-serif;font-size:1.2rem;color:var(--primary)}
.game-timer-ring{position:relative;width:80px;height:80px}
.game-timer-ring svg{width:100%;height:100%;transform:rotate(-90deg)}
.timer-bg{fill:none;stroke:var(--bg3);stroke-width:4}
.timer-fill{fill:none;stroke:var(--primary);stroke-width:4;stroke-dasharray:283;stroke-dashoffset:0;stroke-linecap:round;transition:stroke-dashoffset 1s linear,stroke .3s}
.game-timer-ring span{position:absolute;top:50%;left:50%;transform:translate(-50%,-50%);font-family:'Orbitron',sans-serif;font-size:1.4rem;font-weight:700;color:var(--text)}
.game-lives{display:flex;gap:4px}
.game-lives .heart{color:var(--red);font-size:1.3rem;transition:.3s}
.game-lives .heart.lost{opacity:.2;transform:scale(.8)}
.game-combo{color:var(--yellow);font-size:1rem;margin-top:.3rem;animation:comboPulse .3s}
@keyframes comboPulse{0%{transform:scale(1.3)}100%{transform:scale(1)}}
.game-prompt-area{text-align:center;padding:3rem;background:var(--card);border-radius:var(--radius);border:1px solid var(--border);margin-bottom:2rem;box-shadow:var(--shadow)}
.game-description{font-size:1.5rem;font-weight:600;margin-bottom:1.5rem}
.game-keys{display:flex;justify-content:center;gap:10px;flex-wrap:wrap}
.game-input-display{text-align:center;background:var(--bg2);border:2px dashed var(--border);border-radius:var(--radius);padding:1.5rem;font-family:'JetBrains Mono',monospace;font-size:1.1rem;color:var(--text2)}
.game-input-display.correct{border-color:var(--green);color:var(--green);animation:pulseGreen .4s}
.game-input-display.wrong{border-color:var(--red);color:var(--red);animation:shake .4s}
.game-effect{position:fixed;top:50%;left:50%;transform:translate(-50%,-50%);pointer-events:none;font-family:'Orbitron',sans-serif;font-size:3rem;font-weight:900;opacity:0;z-index:50}
.game-effect.effect-correct{color:var(--green);animation:effectPop .6s forwards}
.game-effect.effect-wrong{color:var(--red);animation:effectPop .6s forwards}
@keyframes effectPop{0%{opacity:1;transform:translate(-50%,-50%) scale(.5)}50%{opacity:1;transform:translate(-50%,-50%) scale(1.2)}100%{opacity:0;transform:translate(-50%,-80%) scale(1)}}
.game-over-title{font-family:'Orbitron',sans-serif;color:var(--primary)}
.final-score{display:block;font-family:'Orbitron',sans-serif;font-size:4rem;font-weight:900;color:var(--primary)}
.score-label{color:var(--text2);font-size:.9rem;display:block;margin-bottom:1rem}
.new-record{color:var(--yellow);font-family:'Orbitron',sans-serif;font-size:1.2rem;margin-bottom:1rem;animation:recordPulse 1s infinite}
@keyframes recordPulse{0%,100%{opacity:1}50%{opacity:.5}}

.quiz-hud{display:flex;justify-content:space-between;align-items:center;margin-bottom:2rem;font-family:'Orbitron',sans-serif}
.quiz-timer-bar{width:120px;height:6px;background:var(--bg3);border-radius:3px;overflow:hidden}
.quiz-timer-fill{height:100%;background:var(--primary);border-radius:3px;transition:width .1s linear;width:100%}
.quiz-question{text-align:center;font-size:1.4rem;font-weight:600;margin-bottom:2rem;padding:2rem;background:var(--card);border-radius:var(--radius);border:1px solid var(--border);box-shadow:var(--shadow)}
.quiz-options{display:grid;grid-template-columns:1fr 1fr;gap:1rem}
.quiz-option{background:var(--card);border:2px solid var(--border);border-radius:var(--radius);padding:1.2rem;cursor:pointer;transition:.3s;font-family:'JetBrains Mono',monospace;font-size:1rem;text-align:center;color:var(--text)}
.quiz-option:hover{border-color:var(--primary);transform:translateY(-2px)}
.quiz-option.correct-answer{border-color:var(--green);background:rgba(0,184,148,.06);color:var(--green)}
.quiz-option.wrong-answer{border-color:var(--red);background:rgba(231,76,60,.06);color:var(--red)}
.stats-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:1rem;margin-bottom:2rem}
.stat-card{background:var(--card);border:1px solid var(--border);border-radius:var(--radius);padding:1.5rem;text-align:center;box-shadow:var(--shadow);transition:.3s}
.stat-card:hover{border-color:rgba(108,92,231,.3)}
.stat-icon{font-size:1.5rem;color:var(--primary);margin-bottom:.5rem}
.stat-value{display:block;font-family:'Orbitron',sans-serif;font-size:2rem;font-weight:700;color:var(--primary)}
.stat-label{color:var(--text2);font-size:.82rem}
.stat-xp-bar{height:6px;background:var(--bg3);border-radius:3px;margin-top:.75rem;overflow:hidden}
.stat-xp-fill{height:100%;background:linear-gradient(90deg,var(--primary),var(--accent));border-radius:3px;width:0;transition:width .5s}
.stat-xp-text{font-size:.75rem;color:var(--text2);margin-top:.3rem;display:block}
.stats-detail{margin-bottom:2rem}
.game-stats-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:1rem}
.game-stat-card{background:var(--card);border:1px solid var(--border);border-radius:var(--radius);padding:1.5rem;text-align:center;box-shadow:var(--shadow)}
.game-stat-card h4{margin-bottom:.75rem;color:var(--primary)}
.game-stat-value{display:block;font-family:'Orbitron',sans-serif;font-size:2rem;font-weight:700;color:var(--text)}
.game-stat-label{color:var(--text2);font-size:.8rem}
.category-progress-list{display:grid;gap:.75rem}
.cat-progress-item{display:flex;align-items:center;gap:1rem;background:var(--card);border:1px solid var(--border);border-radius:12px;padding:1rem 1.5rem;box-shadow:var(--shadow)}
.cat-progress-name{min-width:140px;font-weight:600;font-size:.9rem}
.cat-progress-bar{flex:1;height:8px;background:var(--bg3);border-radius:4px;overflow:hidden}
.cat-progress-fill{height:100%;border-radius:4px;transition:width .5s}
.cat-progress-pct{min-width:45px;text-align:right;font-family:'Orbitron',sans-serif;font-size:.8rem;color:var(--primary)}
.stats-actions{text-align:center;padding:2rem 0}
/* LOGIN */
.login-overlay{position:fixed;top:0;left:0;right:0;bottom:0;z-index:1000;background:var(--bg2);display:flex;align-items:center;justify-content:center}
.login-card{background:var(--card);border:1px solid var(--border);border-radius:24px;padding:3rem;max-width:420px;width:90%;box-shadow:0 8px 40px rgba(108,92,231,.1);text-align:center}
.login-card h1{font-family:'Orbitron',sans-serif;font-size:1.8rem;color:var(--primary);margin-bottom:.5rem}
.login-card p{color:var(--text2);margin-bottom:2rem}
.login-card .brand-icon{font-size:3rem;color:var(--primary);margin-bottom:1rem;display:block}
.form-group{margin-bottom:1.2rem;text-align:left}
.form-group label{display:block;font-weight:600;margin-bottom:.4rem;font-size:.9rem;color:var(--text)}
.form-group input{width:100%;padding:.75rem 1rem;border:2px solid var(--border);border-radius:12px;font-family:inherit;font-size:1rem;background:var(--bg2);color:var(--text);transition:.3s;outline:none}
.form-group input:focus{border-color:var(--primary);box-shadow:0 0 0 3px rgba(108,92,231,.1)}
/* MISSIONS */
.missions-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(280px,1fr));gap:1rem;margin-bottom:2rem}
.mission-card{background:var(--card);border:1px solid var(--border);border-radius:var(--radius);padding:1.5rem;box-shadow:var(--shadow);display:flex;align-items:center;gap:1rem;transition:.3s}
.mission-card.completed{border-color:var(--green);background:rgba(0,184,148,.03)}
.mission-icon{width:50px;height:50px;border-radius:14px;display:flex;align-items:center;justify-content:center;font-size:1.3rem;background:rgba(108,92,231,.08);color:var(--primary);flex-shrink:0}
.mission-card.completed .mission-icon{background:rgba(0,184,148,.1);color:var(--green)}
.mission-info h4{font-size:.95rem;margin-bottom:.2rem}
.mission-info p{color:var(--text2);font-size:.8rem}
.mission-status{margin-left:auto;font-size:1.2rem}
/* CERTIFICATE */
.cert-overlay{position:fixed;top:0;left:0;right:0;bottom:0;z-index:999;background:rgba(0,0,0,.5);display:flex;align-items:center;justify-content:center;backdrop-filter:blur(5px)}
.certificate{background:#fff;width:800px;max-width:95vw;border-radius:20px;padding:3rem;text-align:center;position:relative;border:3px solid var(--primary);box-shadow:0 20px 60px rgba(108,92,231,.2)}
.cert-border{border:2px solid rgba(108,92,231,.15);border-radius:14px;padding:2.5rem;margin:0}
.certificate h2{font-family:'Orbitron',sans-serif;font-size:1.8rem;color:var(--primary);margin-bottom:.3rem}
.certificate h3{font-size:1rem;color:var(--text2);font-weight:400;margin-bottom:1.5rem}
.cert-name{font-family:'Orbitron',sans-serif;font-size:2.2rem;color:var(--text);margin:1rem 0;padding:.5rem 0;border-bottom:2px solid var(--primary);display:inline-block}
.cert-detail{color:var(--text2);margin-bottom:1.5rem;line-height:1.7}
.cert-badges{display:flex;justify-content:center;gap:.5rem;flex-wrap:wrap;margin-bottom:1.5rem}
.cert-badge{background:rgba(108,92,231,.06);border:1px solid rgba(108,92,231,.2);border-radius:20px;padding:.3rem .8rem;font-size:.75rem;color:var(--primary)}
.cert-date{color:var(--text2);font-size:.85rem;margin-bottom:1.5rem}
.cert-actions{display:flex;justify-content:center;gap:1rem}
/* TOAST */
.toast-container{position:fixed;bottom:2rem;right:2rem;z-index:200;display:flex;flex-direction:column;gap:.5rem}
.toast{padding:.75rem 1.5rem;border-radius:12px;font-size:.9rem;animation:toastIn .3s;backdrop-filter:blur(10px)}
.toast-success{background:rgba(0,184,148,.1);border:1px solid rgba(0,184,148,.3);color:var(--green)}
.toast-error{background:rgba(231,76,60,.1);border:1px solid rgba(231,76,60,.3);color:var(--red)}
.toast-info{background:rgba(108,92,231,.1);border:1px solid rgba(108,92,231,.3);color:var(--primary)}
.toast-xp{background:rgba(243,156,18,.1);border:1px solid rgba(243,156,18,.3);color:var(--yellow)}
@keyframes toastIn{from{opacity:0;transform:translateX(30px)}to{opacity:1;transform:translateX(0)}}
.user-info-bar{display:flex;align-items:center;gap:.5rem;font-size:.85rem;color:var(--text2)}
.user-info-bar i{color:var(--primary)}
.btn-sm{padding:.4rem .8rem;font-size:.78rem}
@media(max-width:900px){
.hero{grid-template-columns:1fr;text-align:center}.hero-subtitle{margin:0 auto 2rem}.hero-actions,.hero-stats{justify-content:center}.hero-visual{display:none}.features-grid,.game-modes{grid-template-columns:1fr}.stats-grid{grid-template-columns:repeat(2,1fr)}.game-stats-grid{grid-template-columns:1fr}.quiz-options{grid-template-columns:1fr}.nav-links span{display:none}
}
@media(max-width:600px){
#main-nav{padding:0 .5rem}.page{padding:75px 1rem 1rem}.hero-title{font-size:1.8rem}.stats-grid{grid-template-columns:1fr}.certificate{padding:1.5rem}.cert-border{padding:1.5rem}.cert-name{font-size:1.5rem}
}
@media print{
.cert-overlay{position:static;background:none}.cert-actions,.toast-container,#main-nav{display:none}.certificate{box-shadow:none;border:3px solid #6c5ce7;max-width:100%}
}