:root{
  --bg:#0b0b0c;
  --panel:#111114;
  --text:#f5f5f5;
  --muted:rgba(245,245,245,.72);
  --line:rgba(255,255,255,.10);
  --shadow: 0 14px 30px rgba(0,0,0,.55);
  --shadow2: 0 10px 20px rgba(0,0,0,.35);
  --radius:18px;
  --max:1100px;
}

*{box-sizing:border-box}
html,body{margin:0;padding:0}
body{
  background: radial-gradient(1200px 600px at 20% 10%, rgba(255,255,255,.06), transparent 60%),
              radial-gradient(900px 500px at 90% 30%, rgba(255,255,255,.05), transparent 55%),
              var(--bg);
  color:var(--text);
  font-family: "Noto Sans TC","Microsoft JhengHei",system-ui,-apple-system,sans-serif;
  line-height:1.6;
}

.container{max-width:var(--max); margin:0 auto; padding:0 18px;}
.section{padding:54px 0;}
h1,h2,h3{margin:0 0 10px 0; letter-spacing:.3px;}
h2{font-size:22px;}
.muted{color:var(--muted);}
.mono{font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", "Courier New", monospace;}

.topbar{
  position:sticky; top:0; z-index:50;
  background: rgba(10,10,12,.72);
  backdrop-filter: blur(10px);
  border-bottom:1px solid var(--line);
}
.topbar .container{display:flex; align-items:center; justify-content:space-between;}

.topbar{
  padding:12px 0;
}
.brand{display:flex; gap:12px; align-items:center; padding:0 18px;}
.logo{
  width:44px; height:44px;
  border:1px solid var(--line);
  border-radius:14px;
  display:grid; place-items:center;
  box-shadow: var(--shadow2);
  background: linear-gradient(180deg, rgba(255,255,255,.08), rgba(255,255,255,.02));
  font-weight:700;
}
.brand-text .name{font-weight:800; font-size:16px;}
.brand-text .tag{font-size:12px; color:var(--muted); margin-top:2px;}

.nav{margin-left:auto; padding-right:18px; display:flex; align-items:center;}
.nav-toggle{
  display:none;
  width:44px;height:44px;
  border-radius:14px;
  border:1px solid var(--line);
  background: linear-gradient(180deg, rgba(255,255,255,.08), rgba(255,255,255,.02));
  box-shadow: var(--shadow2);
  cursor:pointer;
}
.nav-toggle span{
  display:block;
  height:2px; width:18px;
  background: var(--text);
  margin:4px auto;
  opacity:.9;
}

.nav-menu{display:flex; gap:10px; align-items:center;}
.nav-link, .dropdown-btn{
  color:var(--text);
  text-decoration:none;
  font-size:14px;
  padding:10px 12px;
  border-radius:12px;
  border:1px solid transparent;
  background: transparent;
  cursor:pointer;
}
.nav-link:hover, .dropdown-btn:hover{
  border-color: var(--line);
  background: rgba(255,255,255,.04);
}

.dropdown{position:relative;}
.dropdown-menu{
  position:absolute;
  right:0;
  top:46px;
  min-width:160px;
  padding:10px;
  border-radius:14px;
  border:1px solid var(--line);
  background: rgba(18,18,22,.96);
  box-shadow: var(--shadow);
  display:none;
}
.dropdown-menu a{
  display:block;
  padding:10px 10px;
  border-radius:10px;
  color:var(--text);
  text-decoration:none;
  font-size:14px;
}
.dropdown-menu a:hover{
  background: rgba(255,255,255,.05);
}

.hero{padding:38px 0 24px;}
.grid-2{display:grid; grid-template-columns: 1.2fr .8fr; gap:14px; margin-top:14px;}
.grid-3{display:grid; grid-template-columns: repeat(3, 1fr); gap:14px;}
@media (max-width: 880px){
  .grid-2{grid-template-columns:1fr;}
  .grid-3{grid-template-columns:1fr;}
}

.card{
  border:1px solid var(--line);
  border-radius:var(--radius);
  background: rgba(255,255,255,.03);
  padding:18px;
}
.card-3d{
  box-shadow: var(--shadow);
  background: linear-gradient(180deg, rgba(255,255,255,.06), rgba(255,255,255,.02));
}
.pill{
  display:inline-block;
  padding:6px 10px;
  border:1px solid var(--line);
  border-radius:999px;
  font-size:12px;
  color: var(--muted);
  background: rgba(255,255,255,.03);
}
.lead{color:var(--muted); margin:10px 0 0;}
.hero-actions{display:flex; gap:10px; margin-top:14px; flex-wrap:wrap;}

.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  padding:11px 14px;
  border-radius:14px;
  border:1px solid rgba(255,255,255,.22);
  background: rgba(255,255,255,.10);
  color: var(--text);
  text-decoration:none;
  cursor:pointer;
  font-size:14px;
  box-shadow: var(--shadow2);
}
.btn:hover{background: rgba(255,255,255,.14);}
.btn.ghost{
  background: transparent;
  border-color: var(--line);
  box-shadow:none;
}
.btn.ghost:hover{background: rgba(255,255,255,.05);}

.list{margin:10px 0 0; padding-left:18px;}
.meta{margin-top:12px; display:flex; gap:8px; flex-wrap:wrap;}
.chip{
  font-size:12px;
  border:1px solid var(--line);
  color:var(--muted);
  padding:6px 10px;
  border-radius:999px;
  background: rgba(255,255,255,.03);
}

.form{margin-top:6px;}
.row{display:grid; grid-template-columns:1fr 1fr; gap:12px;}
@media (max-width:700px){
  .row{grid-template-columns:1fr;}
  .nav-toggle{display:block;}
  .nav-menu{
    position:absolute;
    right:18px;
    top:68px;
    flex-direction:column;
    align-items:stretch;
    padding:12px;
    border-radius:16px;
    border:1px solid var(--line);
    background: rgba(18,18,22,.96);
    box-shadow: var(--shadow);
    display:none;
    min-width:220px;
  }
  .nav-menu.show{display:flex;}
  .dropdown{width:100%;}
  .dropdown-menu{position:static; top:auto; right:auto; display:none; margin-top:8px;}
}

.field{display:flex; flex-direction:column; gap:6px; margin-top:12px;}
label{font-size:13px; color:var(--muted);}
input, textarea{
  border-radius:14px;
  border:1px solid rgba(255,255,255,.14);
  background: rgba(0,0,0,.25);
  color: var(--text);
  padding:12px 12px;
  outline:none;
}
input:focus, textarea:focus{
  border-color: rgba(255,255,255,.28);
  box-shadow: 0 0 0 3px rgba(255,255,255,.06);
}

.actions{display:flex; gap:10px; margin-top:14px; flex-wrap:wrap;}
.status{margin-top:10px; color:var(--muted); min-height:22px;}

.footer{padding:24px 18px 40px;}
/* ===== Topbar 導覽列修正 ===== */
.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.nav {
  display: flex;
  align-items: center;
}

.nav-menu {
  display: flex;
  align-items: center;
  gap: 1.5rem;
}

.nav-link {
  text-decoration: none;
  color: #000;
}

/* dropdown 對齊 */
.dropdown {
  position: relative;
}

.dropdown-btn {
  background: none;
  border: none;
  font: inherit;
  cursor: pointer;
}

.dropdown-menu {
  position: absolute;
  top: 120%;
  right: 0;
  min-width: 140px;
  background: #fff;
  border: 1px solid #000;
  display: none;
  flex-direction: column;
}

.dropdown-menu a {
  padding: 0.6rem 0.8rem;
  white-space: nowrap;
}

.dropdown-menu.show {
  display: flex;
}

/* 手機版 */
@media (max-width: 768px) {
  .nav-menu {
    display: none;
    flex-direction: column;
    align-items: flex-start;
    gap: 1rem;
  }

  .nav-menu.show {
    display: flex;
  }
}
/* ===============================
   📱 Mobile UI Enhancement
   =============================== */
@media (max-width: 768px) {

  /* 整體間距變舒適 */
  .container {
    padding: 1.2rem;
  }

  /* Header 不擠 */
  .topbar {
    padding: 0.8rem 1rem;
  }

  .brand {
    gap: 0.6rem;
  }

  .name {
    font-size: 1rem;
  }

  .tag {
    font-size: 0.75rem;
    opacity: 0.75;
  }

  /* Hero 區主視覺 */
  .hero .card {
    padding: 1.5rem 1.2rem;
  }

  .hero h1 {
    font-size: 1.4rem;
    line-height: 1.4;
  }

  .lead {
    font-size: 0.95rem;
    line-height: 1.7;
  }

  /* Hero 按鈕不擠 */
  .hero-actions {
    display: flex;
    gap: 0.6rem;
  }

  .hero-actions .btn {
    flex: 1;
    text-align: center;
    padding: 0.6rem 0;
  }

  /* Section 標題 */
  .section h2 {
    font-size: 1.25rem;
    margin-bottom: 0.8rem;
  }

  /* 卡片層次感 */
  .card {
    padding: 1.2rem;
    border-radius: 14px;
  }

  /* 技能 / 作品卡片 */
  .grid-2,
  .grid-3 {
    gap: 0.9rem;
  }

  .card h3 {
    font-size: 1.05rem;
    margin-bottom: 0.4rem;
  }

  .card p,
  .card li {
    font-size: 0.9rem;
    line-height: 1.6;
  }

  /* chip 標籤更好點 */
  .chip {
    font-size: 0.75rem;
    padding: 0.2rem 0.5rem;
    border-radius: 999px;
  }

  /* 表單視覺 */
  .form .row {
    flex-direction: column;
    gap: 0.6rem;
  }

  .field input,
  .field textarea {
    font-size: 0.9rem;
    padding: 0.6rem 0.7rem;
    border-radius: 10px;
  }

  /* 送出按鈕 */
  .actions {
    display: flex;
    gap: 0.6rem;
  }

  .actions .btn {
    flex: 1;
  }

  /* Footer */
  .footer {
    font-size: 0.75rem;
    padding: 1.2rem 0;
    opacity: 0.7;
  }
}