/* ═══════════════════════════════════════════════════════════
   TRẮC NGHIỆM MBTI — KTHDIGI GOLDEN TEMPLATE v2.0
   Glassmorphism 3D · Dark/Light Mode · CSS Grid
   ═══════════════════════════════════════════════════════════ */

@font-face{font-family:'Phudu';src:url('https://kth-electric.com/wp-content/fonts/DT-Phudu/DTPhudu-Bold.woff') format('woff');font-weight:700;font-display:swap}
@font-face{font-family:'Ganh';src:url('https://kth-electric.com/wp-content/fonts/Ganh/Ganh%20Type-Regular.otf') format('opentype');font-weight:400;font-display:swap}

:root{
  --p:#8b5cf6;--p2:#7c3aed;--p3:#6d28d9;
  --pg:linear-gradient(135deg,#6366f1,#8b5cf6,#d946ef);
  --bg:#f8fafc;--bg2:#fff;--card:rgba(255,255,255,0.85);
  --txt:#0f172a;--txt2:#475569;--txt3:#64748b;
  --border:rgba(139,92,246,0.15);--shadow:0 10px 30px rgba(139,92,246,0.1);
  --r:16px;--font-h:'Phudu',system-ui,sans-serif;--font-b:'Ganh',system-ui,sans-serif;
}
html.dark{
  --bg:#0f172a;--bg2:#1e293b;--card:rgba(30,41,59,0.7);
  --txt:#f1f5f9;--txt2:#cbd5e1;--txt3:#94a3b8;
  --border:rgba(139,92,246,0.2);--shadow:0 10px 30px rgba(0,0,0,0.3);
}

*{box-sizing:border-box;margin:0;padding:0}
body{font-family:var(--font-b);background:var(--bg);color:var(--txt);line-height:1.6;transition:background .3s,color .3s}
.brand-font{font-family:var(--font-h)}
.container{max-width:1000px;margin:0 auto;padding:0 20px}
a{color:var(--p);text-decoration:none}

/* ─── NAV ─── */
.kth-nav{position:sticky;top:0;z-index:1000;background:rgba(255,255,255,.85);backdrop-filter:blur(20px) saturate(180%);border-bottom:1px solid var(--border);transition:.3s}
html.dark .kth-nav{background:rgba(15,23,42,.8)}
.nav-inner{display:flex;align-items:center;justify-content:space-between;height:60px}
.nav-logo{font-family:var(--font-h);font-size:1.4rem;font-weight:700;color:var(--p);display:flex;align-items:center;gap:8px}
.nav-logo span{color:var(--txt)}
.nav-actions{display:flex;gap:10px}
.btn-theme{width:36px;height:36px;border:none;background:rgba(139,92,246,.1);color:var(--p);border-radius:10px;cursor:pointer;font-size:1rem;transition:.2s;display:flex;align-items:center;justify-content:center}
.btn-theme:hover{background:var(--p);color:#fff}

/* ─── HERO ─── */
.hero{background:var(--pg);padding:60px 20px;text-align:center;color:#fff;position:relative;overflow:hidden}
.hero::before{content:'';position:absolute;inset:0;background:radial-gradient(circle at 50% 50%,rgba(255,255,255,.15) 0%,transparent 60%)}
.hero h1{font-family:var(--font-h);font-size:clamp(1.8rem,4vw,2.8rem);margin-bottom:12px;text-shadow:0 2px 10px rgba(0,0,0,.2);position:relative}
.hero p{font-size:1.1rem;opacity:.9;max-width:600px;margin:0 auto;position:relative}

/* ─── APP CONTAINER (Glassmorphism) ─── */
.app-container{margin-top:-30px;position:relative;z-index:10}
.glass-card{background:var(--card);backdrop-filter:blur(16px);-webkit-backdrop-filter:blur(16px);border:1px solid rgba(255,255,255,0.3);border-radius:24px;padding:30px;box-shadow:var(--shadow);transition:.3s}
html.dark .glass-card{border-color:rgba(255,255,255,0.05)}

/* ─── VIEWS ─── */
.view-section{display:none;animation:fadeIn .4s cubic-bezier(0.4, 0, 0.2, 1)}
.view-section.active{display:block}
@keyframes fadeIn{from{opacity:0;transform:translateY(10px)}to{opacity:1;transform:translateY(0)}}

/* ─── WELCOME VIEW ─── */
.welcome-box{text-align:center;padding:20px 0}
.welcome-box img{width:120px;margin-bottom:20px;filter:drop-shadow(0 10px 15px rgba(139,92,246,0.3))}
.btn-start{background:var(--pg);color:#fff;border:none;padding:16px 40px;font-size:1.2rem;font-family:var(--font-h);border-radius:50px;cursor:pointer;transition:.3s;box-shadow:0 8px 20px rgba(139,92,246,0.4);display:inline-flex;align-items:center;gap:10px}
.btn-start:hover{transform:translateY(-2px);box-shadow:0 12px 25px rgba(139,92,246,0.5)}

/* ─── QUIZ VIEW ─── */
.progress-wrap{margin-bottom:30px}
.progress-text{display:flex;justify-content:space-between;font-size:.85rem;color:var(--txt3);font-weight:600;margin-bottom:8px}
.progress-bar{height:8px;background:rgba(139,92,246,.1);border-radius:10px;overflow:hidden}
.progress-fill{height:100%;background:var(--pg);width:0%;transition:width .4s ease-out, background .4s}

.question-card{min-height:220px;display:flex;flex-direction:column;justify-content:center}
.q-title{font-family:var(--font-h);font-size:clamp(1.2rem,3vw,1.5rem);color:var(--txt);margin-bottom:24px;text-align:center;line-height:1.5}
.options{display:flex;flex-direction:column;gap:14px}
.opt-btn{background:var(--bg);border:2px solid var(--border);padding:18px 20px;border-radius:16px;font-family:var(--font-b);font-size:1.05rem;color:var(--txt2);cursor:pointer;transition:.2s;text-align:left;position:relative;overflow:hidden}
.opt-btn:hover, .opt-btn.selected{border-color:var(--p);background:rgba(139,92,246,.05);transform:translateY(-1px)}
.opt-btn:active{transform:scale(0.98)}
.opt-btn.selected .opt-char{background:var(--p);color:#fff}
.btn-prev{background:transparent;border:none;color:var(--txt3);font-size:.95rem;font-weight:600;cursor:pointer;transition:color .3s;margin-top:10px;padding:10px}
.btn-prev:hover{color:var(--p)}

/* ─── RESULT VIEW ─── */
.res-header{text-align:center;margin-bottom:30px}
.res-avatar{width:150px;height:150px;border-radius:50%;object-fit:cover;margin:0 auto 20px;display:block;border:4px solid var(--border);box-shadow:var(--shadow);background:var(--bg2)}
.res-type{font-family:var(--font-h);font-size:3.5rem;background:var(--pg);-webkit-background-clip:text;-webkit-text-fill-color:transparent;line-height:1}
.res-name{font-size:1.2rem;font-weight:700;color:var(--txt2);margin-bottom:5px;text-transform:uppercase;letter-spacing:1px}
.res-role{font-size:.9rem;color:var(--p);background:rgba(139,92,246,.1);display:inline-block;padding:4px 12px;border-radius:20px;font-weight:600}

.res-bars{background:var(--bg);border-radius:16px;padding:20px;margin-bottom:30px;border:1px solid var(--border)}
.dim-row{margin-bottom:15px}
.dim-row:last-child{margin-bottom:0}
.dim-labels{display:flex;justify-content:space-between;font-size:.85rem;font-weight:700;margin-bottom:6px;color:var(--txt2)}
.dim-track{height:10px;background:rgba(0,0,0,.05);border-radius:10px;overflow:hidden;display:flex}
html.dark .dim-track{background:rgba(255,255,255,.05)}
.dim-left,.dim-right{height:100%;transition:width 1s cubic-bezier(0.1, 1, 0.3, 1)}

/* Colors for specific traits */
.c-ei{background:#ec4899} .c-sn{background:#0ea5e9} .c-tf{background:#10b981} .c-jp{background:#f59e0b}
.dim-inactive{background:rgba(0,0,0,.08);opacity:0.3}
html.dark .dim-inactive{background:rgba(255,255,255,.08)}

.res-desc{background:var(--bg);border-left:4px solid var(--p);padding:20px;border-radius:0 12px 12px 0;margin-bottom:20px;font-size:1rem;color:var(--txt2);line-height:1.7}

.traits-grid{display:grid;grid-template-columns:1fr 1fr;gap:20px;margin-bottom:30px}
.trait-box{background:var(--bg);padding:15px;border-radius:12px;border:1px solid var(--border)}
.trait-box h4{font-family:var(--font-h);color:var(--p);margin-bottom:8px;font-size:1.1rem;display:flex;align-items:center;gap:6px}
.trait-box p{font-size:.9rem;color:var(--txt2)}
.trait-tag{display:inline-block;background:rgba(139,92,246,.1);color:var(--p2);padding:4px 10px;border-radius:6px;font-size:.8rem;font-weight:600;margin:3px 3px 0 0}

.res-actions{display:flex;gap:15px;justify-content:center}
.btn-share,.btn-retake{padding:12px 24px;border-radius:12px;font-weight:600;font-size:1rem;cursor:pointer;transition:.2s;border:none;display:flex;align-items:center;gap:8px}
.btn-share{background:var(--p);color:#fff;box-shadow:0 4px 15px rgba(139,92,246,.3)}
.btn-share:hover{background:var(--p2);transform:translateY(-2px)}
.btn-dl{background:#10b981;box-shadow:0 4px 15px rgba(16,185,129,.3)}
.btn-dl:hover{background:#059669}
.btn-retake{background:var(--bg);color:var(--txt2);border:1px solid var(--border)}
.btn-retake:hover{background:rgba(139,92,246,.05);color:var(--p)}

/* ─── LOADING ─── */
.loader{display:flex;flex-direction:column;align-items:center;justify-content:center;padding:40px 0}
.spinner{width:40px;height:40px;border:4px solid rgba(139,92,246,.2);border-top-color:var(--p);border-radius:50%;animation:spin 1s linear infinite;margin-bottom:15px}
@keyframes spin{to{transform:rotate(360deg)}}

/* ─── SEO CONTENT ─── */
.seo-section{margin-top:50px}
.seo-card{background:var(--bg2);border-radius:var(--r);padding:30px;box-shadow:var(--shadow);border:1px solid var(--border);margin-bottom:30px}
.seo-card h2,.seo-card h3{font-family:var(--font-h);color:var(--p3);margin-bottom:15px}
html.dark .seo-card h2, html.dark .seo-card h3{color:var(--p)}
.seo-card h2{font-size:1.5rem;border-bottom:2px solid rgba(139,92,246,.1);padding-bottom:10px}
.seo-card p{color:var(--txt2);margin-bottom:15px;line-height:1.7}
.seo-card ul{padding-left:20px;color:var(--txt2);margin-bottom:15px}
.seo-card li{margin-bottom:8px}

.mbti-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(200px,1fr));gap:15px;margin-top:20px}
.mbti-item{background:var(--bg);border:1px solid var(--border);border-radius:12px;padding:15px;text-align:center;transition:.2s;text-decoration:none}
.mbti-item:hover{transform:translateY(-3px);border-color:var(--p);box-shadow:0 5px 15px rgba(139,92,246,.1)}
.mbti-item h4{color:var(--p);font-family:var(--font-h);font-size:1.2rem;margin-bottom:5px}
.mbti-item p{font-size:.8rem;color:var(--txt3)}

/* ─── FOOTER ─── */
.kth-footer{background:var(--bg2);border-top:1px solid var(--border);padding:40px 0 20px;text-align:center;margin-top:50px}
.f-brand{font-family:var(--font-h);color:var(--p);font-size:1.2rem;margin-bottom:10px}
.f-links{display:flex;justify-content:center;gap:15px;flex-wrap:wrap;margin:15px 0}
.f-links a{color:var(--txt3);font-size:.85rem;font-weight:600}
.f-links a:hover{color:var(--p)}
.f-copy{font-size:.8rem;color:var(--txt3)}

@media(max-width:600px){
  .traits-grid{grid-template-columns:1fr}
  .res-actions{flex-direction:column}
  .btn-start{width:100%;justify-content:center}
}