/* ── Variables ── */
:root {
  --bg:      #f6f6fb;
  --bg2:     #eeeef8;
  --bg-card: #ffffff;
  --bg-card-h: #f0f0fa;
  --border:  rgba(0,0,0,0.07);
  --border-h:rgba(99,102,241,0.35);
  --accent:  #5b5fc7;
  --accent2: #7c3aed;
  --accent3: #4f46e5;
  --grad:    linear-gradient(135deg,#5b5fc7,#7c3aed);
  --gold:    #d97706;
  --silver:  #64748b;
  --bronze:  #92400e;
  --text:    #0f0f1e;
  --text2:   #4a4a6e;
  --text3:   #9090b0;
  --r:       12px;
  --r-sm:    8px;
  --r-lg:    20px;
  --nav-h:   64px;
  --max-w:   1100px;
  --ease:    cubic-bezier(0.4,0,0.2,1);
  --shadow:  0 2px 16px rgba(0,0,0,0.07);
  --shadow-lg:0 8px 40px rgba(0,0,0,0.12);
  --glow:    0 0 32px rgba(91,95,199,0.18);
}

/* ── Reset ── */
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{background:var(--bg);color:var(--text);font-family:'Noto Sans TC','Inter',sans-serif;line-height:1.7;overflow-x:hidden;background:linear-gradient(135deg, #f6f6fb, #eef0f8, #f6f6fb);background-size:400% 400%;animation:bg-breathe 25s ease infinite}
@keyframes bg-breathe {
  0% { background-position: 0% 50%; }
  50% { background-position: 100% 50%; }
  100% { background-position: 0% 50%; }
}
a{color:inherit;text-decoration:none}
img{max-width:100%;display:block}
ul{list-style:none}
button{font-family:inherit;cursor:pointer;border:none;background:none;color:inherit}

/* ── Utilities ── */
.container{max-width:var(--max-w);margin:0 auto;padding:0 1.5rem}
.section{padding:6rem 0}
.section-label{display:inline-block;font-size:.9rem;font-weight:700;letter-spacing:.15em;text-transform:uppercase;color:var(--accent);margin-bottom:.8rem}
.section-title{font-size:clamp(2.1rem,4.5vw,3rem);font-weight:800;line-height:1.2;margin-bottom:.75rem}
.section-sub{color:var(--text2);max-width:520px;margin-bottom:3rem;font-size:1.05rem}
.tag{display:inline-block;padding:.2rem .6rem;border-radius:999px;font-size:.75rem;font-weight:500;background:rgba(91,95,199,.1);color:var(--accent);border:1px solid rgba(91,95,199,.2)}
.grad-text{background:var(--grad);-webkit-background-clip:text;background-clip:text;-webkit-text-fill-color:transparent}

/* ── Scrollbar ── */
::-webkit-scrollbar{width:5px;height:5px}
::-webkit-scrollbar-track{background:var(--bg2)}
::-webkit-scrollbar-thumb{background:var(--accent);border-radius:3px}

/* ── Custom Cursor ── */
body { cursor: none; }
a, button, .tl-content, .proj-card, .comp-card, .skill-category { cursor: none !important; }
.cursor-dot { position: fixed; width: 8px; height: 8px; background: var(--accent); border-radius: 50%; pointer-events: none; z-index: 10000; transform: translate(-50%, -50%); transition: width 0.2s, height 0.2s; }
.cursor-outline { position: fixed; width: 36px; height: 36px; border: 1.5px solid var(--accent); border-radius: 50%; pointer-events: none; z-index: 9999; transform: translate(-50%, -50%); transition: width 0.2s, height 0.2s, background 0.2s; }
.cursor-hover .cursor-dot { width: 0; height: 0; }
.cursor-hover .cursor-outline { width: 50px; height: 50px; background: rgba(91,95,199,0.08); border-color: transparent; backdrop-filter: blur(2px); }

/* ── Navbar ── */
#navbar{position:fixed;top:0;left:0;right:0;height:var(--nav-h);z-index:1000;transition:background .4s var(--ease),box-shadow .4s}
#navbar.scrolled{background:rgba(255,255,255,.92);backdrop-filter:blur(16px);box-shadow:0 1px 0 var(--border)}
.nav-inner{display:flex;align-items:center;justify-content:space-between;max-width:var(--max-w);margin:0 auto;padding:0 1.5rem;height:100%}
.nav-logo{font-weight:800;font-size:1.1rem}
.nav-logo span{background:var(--grad);-webkit-background-clip:text;background-clip:text;-webkit-text-fill-color:transparent}
.nav-links{display:flex;gap:2rem;align-items:center}
.nav-links a{font-size:.88rem;color:var(--text2);transition:color .2s;position:relative;padding-bottom:2px}
.nav-links a::after{content:'';position:absolute;bottom:0;left:0;right:0;height:2px;background:var(--grad);transform:scaleX(0);transition:transform .3s var(--ease);border-radius:1px}
.nav-links a:hover,.nav-links a.active{color:var(--text)}
.nav-links a:hover::after,.nav-links a.active::after{transform:scaleX(1)}
.nav-cta{padding:.4rem 1.1rem;border-radius:999px;font-size:.85rem;font-weight:700;background:var(--grad);color:#fff!important;-webkit-text-fill-color:#fff!important;transition:opacity .2s,transform .2s}
.nav-cta:hover{opacity:.85;transform:translateY(-1px)}
.nav-cta::after{display:none!important}

/* ── Hamburger ── */
.hamburger{display:none;flex-direction:column;gap:5px;cursor:pointer;padding:4px}
.hamburger span{display:block;width:22px;height:2px;background:var(--text);border-radius:1px;transition:.3s}
.hamburger.open span:nth-child(1){transform:rotate(45deg) translate(5px,5px)}
.hamburger.open span:nth-child(2){opacity:0}
.hamburger.open span:nth-child(3){transform:rotate(-45deg) translate(5px,-5px)}
.mobile-menu{display:none;flex-direction:column;gap:1rem;padding:1.5rem;background:#fff;border-bottom:1px solid var(--border);position:fixed;top:var(--nav-h);left:0;right:0;z-index:999;box-shadow:var(--shadow-lg)}
.mobile-menu.open{display:flex}
.mobile-menu a{font-size:1rem;color:var(--text2);padding:.5rem 0;border-bottom:1px solid var(--border)}
.mobile-menu .nav-cta{background:var(--grad);color:#fff;text-align:center;border-radius:999px;border:none;padding:.6rem 1.4rem}

/* ── Hero ── */
#hero{min-height:100vh;display:flex;align-items:center;padding-top:var(--nav-h);position:relative;overflow:hidden;background:transparent}
#hero::before{content:'';position:absolute;width:600px;height:600px;border-radius:50%;background:radial-gradient(circle,rgba(91,95,199,.15),transparent 70%);top:-100px;right:-100px;pointer-events:none;animation:blob-move 15s infinite alternate ease-in-out}
#hero::after{content:'';position:absolute;width:400px;height:400px;border-radius:50%;background:radial-gradient(circle,rgba(124,58,237,.12),transparent 70%);bottom:-50px;left:10%;pointer-events:none;animation:blob-move 20s infinite alternate-reverse ease-in-out}
@keyframes blob-move{
  0%,100%{transform:translate(0,0) scale(1)}
  33%{transform:translate(40px,-60px) scale(1.1)}
  66%{transform:translate(-30px,30px) scale(0.9)}
}
.hero-grid{position:relative;z-index:1;display:grid;grid-template-columns:1fr auto;gap:3rem;align-items:center;width:100%}
.hero-eyebrow{display:inline-flex;align-items:center;gap:.5rem;font-size:.78rem;font-weight:600;color:var(--accent);letter-spacing:.1em;text-transform:uppercase;margin-bottom:1.25rem}
.hero-dot{width:7px;height:7px;border-radius:50%;background:var(--accent);animation:pulse 2s infinite}
@keyframes pulse{0%,100%{opacity:1;transform:scale(1)}50%{opacity:.4;transform:scale(.7)}}
.hero-name{font-size:clamp(2.8rem,6vw,5rem);font-weight:900;line-height:1.05;margin-bottom:1.25rem;letter-spacing:-.02em}
.hero-tagline{font-size:1rem;color:var(--text2);max-width:460px;margin-bottom:2rem;line-height:1.85}
.hero-actions{display:flex;gap:.9rem;flex-wrap:wrap}
.btn-primary{padding:.7rem 1.7rem;border-radius:999px;font-weight:700;font-size:.9rem;background:var(--grad);color:#fff;box-shadow:0 4px 20px rgba(91,95,199,.3);transition:transform .2s,box-shadow .2s}
.btn-primary:hover{transform:translateY(-2px);box-shadow:0 6px 28px rgba(91,95,199,.4)}
.btn-outline{padding:.7rem 1.7rem;border-radius:999px;font-weight:700;font-size:.9rem;border:1.5px solid var(--border-h);color:var(--accent);transition:all .2s}
.btn-outline:hover{background:rgba(91,95,199,.06);transform:translateY(-2px)}
.hero-stats{display:flex;gap:2.5rem;margin-top:2.5rem}
.stat-num{font-size:2rem;font-weight:800;background:var(--grad);-webkit-background-clip:text;background-clip:text;-webkit-text-fill-color:transparent}
.stat-label{font-size:.75rem;color:var(--text3)}
/* Avatar */
@keyframes float{
  0%,100%{transform:translateY(0)}
  50%{transform:translateY(-18px)}
}
.hero-avatar{width:220px;height:220px;border-radius:50%;overflow:hidden;border:3px solid rgba(91,95,199,.2);box-shadow:var(--shadow-lg),var(--glow);flex-shrink:0;background:linear-gradient(135deg,#e8e8f8,#d0d0f0);display:flex;align-items:center;justify-content:center;animation:float 6s ease-in-out infinite}
.hero-avatar img{width:100%;height:100%;object-fit:cover}
.avatar-placeholder{font-size:4.5rem;font-weight:900;background:var(--grad);-webkit-background-clip:text;background-clip:text;-webkit-text-fill-color:transparent}

/* ── About ── */
#about{background:#fff}
.about-grid{display:grid;grid-template-columns:1fr 1fr;gap:4rem;align-items:start}
.about-text p{color:var(--text2);line-height:1.9;margin-bottom:.9rem;font-size:1.05rem}
.school-badge{display:inline-flex;align-items:center;gap:.5rem;background:rgba(91,95,199,.08);border:1px solid rgba(91,95,199,.2);border-radius:999px;padding:.35rem .9rem;font-size:.9rem;font-weight:600;color:var(--accent);margin-bottom:1.25rem}
.competencies{display:flex;flex-direction:column;gap:1rem}
.comp-card{padding:1.25rem 1.4rem;border-radius:var(--r);background:var(--bg);border:1px solid var(--border);transition:border-color .3s,box-shadow .3s,transform .1s ease-out;display:flex;flex-direction:column;transform-style:preserve-3d}
.comp-card:hover{border-color:var(--border-h);box-shadow:var(--shadow-lg)}
.comp-card > * {transform:translateZ(20px)}
.comp-icon{color:var(--accent);margin-bottom:.6rem;width:28px;height:28px}
.comp-title{font-weight:700;margin-bottom:.2rem;font-size:1.05rem}
.comp-desc{font-size:.95rem;color:var(--text2);line-height:1.65}

/* ── Competitions ── */
#competitions{background:transparent}
/* Detail panel */
#comp-detail{background:#fff;border:1px solid var(--border);border-radius:var(--r-lg);margin-bottom:2.5rem;overflow:hidden;max-height:0;opacity:0;transition:max-height .5s var(--ease),opacity .4s var(--ease);box-shadow:var(--shadow-lg)}
#comp-detail.open{max-height:700px;opacity:1}
.detail-inner{padding:2rem}
.detail-header{display:flex;justify-content:space-between;align-items:flex-start;margin-bottom:1.5rem;flex-wrap:wrap;gap:1rem}
.detail-title{font-size:1.35rem;font-weight:800;margin-bottom:.5rem}
.detail-meta{display:flex;gap:.6rem;flex-wrap:wrap;align-items:center}
.detail-body{display:grid;grid-template-columns:1fr 160px;gap:2rem}
.detail-section{margin-bottom:1rem}
.detail-section-label{font-size:.8rem;text-transform:uppercase;letter-spacing:.12em;color:var(--text3);margin-bottom:.3rem;font-weight:600}
.detail-section-val{color:var(--text2);font-size:1rem;line-height:1.75}
.detail-skills{display:flex;flex-wrap:wrap;gap:.4rem;margin-top:.4rem}
.detail-cert{width:100%;border-radius:var(--r-sm);display:flex;flex-direction:column;align-items:center;justify-content:center;gap:.5rem;color:var(--text3);font-size:.85rem;text-align:center;flex-shrink:0}
.detail-cert img{width:100%;height:auto;object-fit:contain;border-radius:var(--r-sm);box-shadow:var(--shadow)}
.detail-cert-icon{font-size:2rem;opacity:.4}
.close-btn{width:32px;height:32px;border-radius:50%;border:1.5px solid var(--border);display:flex;align-items:center;justify-content:center;color:var(--text3);font-size:1rem;transition:.2s;flex-shrink:0}
.close-btn:hover{border-color:var(--accent);color:var(--accent)}

/* ── Horizontal Timeline ── */
.tl-wrapper{position:relative;overflow-x:auto;overflow-y:visible;padding:2rem 2rem 1rem;cursor:grab}
.tl-wrapper:active{cursor:grabbing}
.tl-wrapper::-webkit-scrollbar{height:4px}
.tl-wrapper::-webkit-scrollbar-thumb{background:rgba(91,95,199,.3);border-radius:2px}
.timeline{display:flex;align-items:stretch;position:relative;min-width:max-content;padding-bottom:1rem}
/* horizontal spine */
.timeline::before{content:'';position:absolute;left:0;right:0;top:calc(2.5rem + 18px);height:2px;background:linear-gradient(to right,transparent 20px,var(--accent),var(--accent2),transparent calc(100% - 20px))}
.tl-item{display:flex;flex-direction:column;align-items:center;width:150px;flex:0 0 150px;position:relative;padding-top:0}
.tl-date{font-size:.72rem;color:var(--text3);font-variant-numeric:tabular-nums;white-space:nowrap;height:2.5rem;display:flex;align-items:flex-end;padding-bottom:.5rem;font-weight:600}
.tl-dot-wrap{display:flex;justify-content:center;align-items:center;height:36px;position:relative;z-index:1}
.tl-dot{width:14px;height:14px;border-radius:50%;background:#fff;border:2.5px solid var(--accent);transition:transform .3s var(--ease),background .3s,box-shadow .3s;cursor:pointer}
.tl-item:hover .tl-dot,.tl-item.active .tl-dot{transform:scale(1.5);background:var(--accent);box-shadow:0 0 0 5px rgba(91,95,199,.18)}
.tl-content{margin-top:.75rem;text-align:center;padding:0 .4rem;cursor:pointer;border-radius:var(--r-sm);transition:background .2s;width:100%}
.tl-content:hover{background:rgba(91,95,199,.05)}
.tl-name{font-size:.78rem;font-weight:700;color:var(--text);margin-bottom:.35rem;line-height:1.3;word-break:break-all}
.award-badge{display:inline-block;padding:.15rem .55rem;border-radius:999px;font-size:.68rem;font-weight:700;margin-bottom:.2rem}
.award-first{background:linear-gradient(135deg,#f59e0b,#fbbf24);color:#1c1000}
.award-second{background:linear-gradient(135deg,#64748b,#94a3b8);color:#fff}
.award-third{background:linear-gradient(135deg,#a16207,#ca8a04);color:#fff}
.award-honorable{background:rgba(91,95,199,.12);color:var(--accent);border:1px solid rgba(91,95,199,.3)}
.award-special{background:linear-gradient(135deg,#ec4899,#7c3aed);color:#fff}
.cat-badge{display:block;font-size:.67rem;color:var(--text3);margin-top:.15rem}

/* ── Shared Tooltip ── */
#tl-tooltip{position:fixed;z-index:9999;width:280px;background:#fff;border:1px solid var(--border-h);border-radius:var(--r);padding:1rem;box-shadow:var(--shadow-lg);pointer-events:none;opacity:0;transform:translateY(6px);transition:opacity .18s var(--ease),transform .18s var(--ease)}
#tl-tooltip.visible{opacity:1;transform:translateY(0)}
.preview-title{font-size:.88rem;font-weight:700;margin-bottom:.35rem;color:var(--text)}
.preview-theme{font-size:.78rem;color:var(--accent);margin-bottom:.45rem;line-height:1.4}
.preview-summary{font-size:.8rem;color:var(--text2);line-height:1.65;margin-bottom:.55rem}
.preview-skills{display:flex;flex-wrap:wrap;gap:.3rem}
.preview-skills .tag{font-size:.68rem;padding:.12rem .45rem}
.preview-hint{font-size:.7rem;color:var(--text3);margin-top:.5rem;text-align:right}

/* scroll hint */
.tl-scroll-hint{display:flex;align-items:center;gap:.4rem;font-size:.75rem;color:var(--text3);margin-bottom:.75rem}
.tl-scroll-hint svg{width:16px;height:16px}

/* ── Projects ── */
#projects{background:#fff}
.projects-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:1.5rem}
.proj-card{border-radius:var(--r);background:var(--bg-card);border:1px solid var(--border);overflow:hidden;display:flex;flex-direction:column;transition:border-color .3s var(--ease),box-shadow .3s,transform .1s ease-out;transform-style:preserve-3d;will-change:transform}
.proj-card:hover{border-color:var(--border-h);box-shadow:0 20px 40px rgba(91,95,199,0.12),var(--shadow-lg)}
.proj-cover{height:130px;background:linear-gradient(135deg,rgba(91,95,199,.1),rgba(124,58,237,.06));display:flex;align-items:center;justify-content:center;font-size:2.2rem;position:relative;overflow:hidden;transform:translateZ(30px)}
.proj-cover img{position:absolute;inset:0;width:100%;height:100%;object-fit:cover;transition:transform .5s var(--ease)}
.proj-card:hover .proj-cover img{transform:scale(1.05)}
.proj-body{padding:1.25rem;flex:1;display:flex;flex-direction:column;transform:translateZ(20px)}
.proj-subtitle{font-size:.8rem;color:var(--accent);font-weight:600;margin-bottom:.3rem;letter-spacing:.05em}
.proj-title{font-size:1.1rem;font-weight:800;margin-bottom:.35rem}
.proj-desc{font-size:.95rem;color:var(--text2);line-height:1.65;flex:1;margin-bottom:.8rem}
.proj-tags{display:flex;flex-wrap:wrap;gap:.35rem;margin-bottom:.9rem}
.proj-tags .tag{font-size:.75rem}
.proj-footer{display:flex;align-items:center;justify-content:space-between}
.proj-role{font-size:.8rem;color:var(--text3);font-weight:600}

/* ── Skills ── */
#skills{background:rgba(238,238,248,0.5)}
.skills-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(280px,1fr));gap:1.5rem}
.skill-category{border-radius:var(--r);background:#fff;border:1px solid var(--border);padding:1.5rem;transition:border-color .3s,box-shadow .3s,transform .1s ease-out;transform-style:preserve-3d;will-change:transform}
.skill-category:hover{border-color:var(--border-h);box-shadow:0 15px 30px rgba(91,95,199,0.08),var(--shadow)}
.skill-category > * {transform:translateZ(20px)}
.skill-cat-header{display:flex;align-items:center;gap:.6rem;margin-bottom:1.2rem}
.skill-cat-icon{color:var(--accent);width:24px;height:24px}
.skill-cat-name{font-size:1.05rem;font-weight:800;color:var(--text);display:block}
.skill-cat-percent{font-size:.8rem;font-weight:600;color:var(--accent);display:inline-block;background:rgba(91,95,199,.1);padding:.1rem .5rem;border-radius:999px;margin-top:.2rem}
.skill-items{display:flex;flex-direction:column;gap:.8rem}
.skill-name{font-size:.95rem;color:var(--text2);margin-bottom:.18rem;font-weight:500}

/* ── Contact ── */
#contact{background:linear-gradient(160deg,#f0effc,#f6f6fb)}
#contact .section-sub{margin-left:auto;margin-right:auto;text-align:center}
#contact .section-title{text-align:center}
.contact-card{display:inline-flex;flex-direction:column;align-items:center;gap:2rem;background:#fff;border:1px solid var(--border);border-radius:var(--r-lg);padding:3rem 4rem;box-shadow:var(--shadow-lg)}
.contact-links{display:flex;gap:1rem;flex-wrap:wrap;justify-content:center}
.contact-link{display:flex;align-items:center;gap:.6rem;padding:.55rem 1.3rem;border-radius:999px;border:1.5px solid var(--border);font-size:.88rem;font-weight:600;color:var(--text2);transition:all .25s}
.contact-link:hover{border-color:var(--accent);color:var(--accent);background:rgba(91,95,199,.06);transform:translateY(-2px)}
.contact-link svg{width:16px;height:16px;flex-shrink:0}

/* ── Footer ── */
footer{background:#fff;border-top:1px solid var(--border);padding:1.5rem;text-align:center;font-size:.78rem;color:var(--text3)}

/* ── Reveal animations ── */
.reveal{opacity:0;transform:translateY(24px);transition:opacity .7s var(--ease),transform .7s var(--ease)}
.reveal.visible{opacity:1;transform:none}
.reveal-delay-1{transition-delay:.1s}
.reveal-delay-2{transition-delay:.2s}
.reveal-delay-3{transition-delay:.3s}
.tl-item{opacity:1;transform:none}

/* ── Responsive ── */
@media(max-width:1000px){
  .projects-grid{grid-template-columns:repeat(2,1fr)}
  .about-grid{grid-template-columns:1fr}
  .detail-body{grid-template-columns:1fr}
  .detail-cert{display:none}
}
@media(max-width:768px){
  .hero-grid{grid-template-columns:1fr}
  .hero-avatar{width:140px;height:140px;margin-bottom:1rem}
  .hero-name{font-size:clamp(2.2rem,8vw,3rem)}
  .nav-links{display:none}
  .hamburger{display:flex}
  .section{padding:4rem 0}
  .tl-item{width:120px;flex:0 0 120px}
  .contact-card{padding:2rem 1.5rem}
  .hero-stats{gap:1.5rem}
}
@media(max-width:500px){
  .projects-grid{grid-template-columns:1fr}
  .tl-item{width:105px;flex:0 0 105px}
  .tl-name{font-size:.72rem}
  .hero-grid{justify-items:center;text-align:center}
  .hero-tagline,.section-sub{max-width:100%}
  .hero-actions{justify-content:center}
  .hero-stats{justify-content:center}
}