/* ========== AIDA Light Theme ========== */
* { margin:0; padding:0; box-sizing:border-box; }
:root{
  --bg:#f7f8fb;
  --panel:#ffffff;
  --text:#101828;
  --muted:#667085;
  --border:#e9eef5;
  --brand:#2f6feb;
  --brand-2:#7c91ff;
  --chip:#f2f4f7;
  --chip-text:#344054;
  --shadow:0 8px 24px rgba(16,24,40,.08);
}
html,body{ height:100%; }
body{
  font-family: Inter, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height:1.6;
}

/* ---- Header ---- */
.header-light{
  background:#fff;
  position:sticky; top:0; z-index:1000;
  border-bottom:1px solid var(--border);
  box-shadow: 0 4px 18px rgba(16,24,40,.04);
}
.header-content{ padding: 18px 16px 14px; text-align:center; max-width:1200px; margin:0 auto; }
.brand-row{ display:flex; align-items:center; justify-content:space-between; gap:12px; }
.logo-link-light{
  text-decoration:none; font-weight:800; font-size: clamp(1.6rem, 4vw, 2.2rem);
  background: linear-gradient(135deg, var(--brand) 0%, var(--brand-2) 100%);
  -webkit-background-clip:text; background-clip:text; -webkit-text-fill-color:transparent;
}
.subtitle-dark{ color:var(--muted); margin:.25rem 0 1rem; }

.account-area{ display:flex; gap:8px; align-items:center; }
.welcome{ color:var(--muted); margin-right:6px; }
.btn{
  appearance:none; border:1px solid var(--border); background:#fff; color:var(--text);
  padding:8px 12px; border-radius:10px; cursor:pointer; font-weight:600; font-size:14px;
  box-shadow: 0 1px 0 rgba(16,24,40,.02);
}
.btn:hover{ filter:brightness(1.02); }
.btn.primary{ background:var(--brand); color:#fff; border-color:transparent; }
.btn.primary.outline{ background:#fff; color:var(--brand); border-color: var(--brand); }
.btn.ghost{ background:#fff; color:var(--text); }

.search-container{ position:relative; max-width:640px; margin:0.25rem auto 0; }
#searchInput{
  width:100%; padding:14px 16px; padding-right:40px; border-radius:12px; border:1px solid var(--border); background:#fff; font-size:15px;
  box-shadow: 0 1px 0 rgba(16,24,40,.02);
}
#searchInput:focus{ outline:none; border-color: var(--brand); box-shadow: 0 0 0 4px rgba(47,111,235,.12); }
.search-icon{ position:absolute; right:12px; top:50%; transform:translateY(-50%); opacity:.6; }

/* ---- Quick filters ---- */
.quick-filters{ margin-top:10px; display:flex; gap:8px; justify-content:center; flex-wrap:wrap; }
.chip{
  border:1px solid var(--border); background:var(--chip); color:var(--chip-text);
  padding:7px 12px; border-radius:999px; cursor:pointer; font-size:.9rem; transition:.2s;
}
.chip:hover{ filter:brightness(1.02); }
.chip.is-active{ background: linear-gradient(135deg, #eef3ff, #fff); border-color: var(--brand); color: var(--brand); }

/* ---- Recent bar ---- */
.recent-bar{
  margin:10px auto 0; max-width:1000px; display:flex; gap:8px; justify-content:center; flex-wrap:wrap;
}
.recent-bar .pill{
  display:inline-flex; align-items:center; gap:6px; padding:6px 10px; border:1px solid var(--border); background:#fff; border-radius:999px;
  text-decoration:none; color:var(--text); font-size:.85rem; box-shadow: 0 1px 0 rgba(16,24,40,.02);
}
.recent-bar .pill img{ width:16px; height:16px; }
.muted{ color:var(--muted); }

/* ---- Layout ---- */
main{ display:flex; min-height:calc(100vh - 220px); max-width:1200px; margin:0 auto; gap:16px; padding:16px; }

/* ---- Sidebar ---- */
#categoryList{
  width:260px; background:var(--panel); padding:16px; border:1px solid var(--border); border-radius:14px; height:fit-content;
  box-shadow: var(--shadow);
}
#categoryList h3{ font-weight:700; font-size:1rem; color:#1d2939; margin-bottom:10px; }
.category-buttons{ display:flex; flex-direction:column; gap:8px; }
#categoryList button{
  width:100%; padding:10px 12px; background:#fff; border:1px solid var(--border); border-radius:10px; cursor:pointer; text-align:left; font-size:.92rem;
}
#categoryList button:hover{ border-color:var(--brand); background:#f6faff; }
#categoryList button.active{ border-color:var(--brand); background:#eef3ff; color:var(--brand); }
#categoryList .badge{ float:right; background:#eef3ff; color:#1d4ed8; padding:2px 6px; border-radius:8px; font-size:.75rem; }

/* ---- Grid ---- */
#toolGrid{
  flex:1; display:grid; grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); gap:14px;
}
.tool-card{
  background:#fff; border:1px solid var(--border); border-radius:14px; padding:14px; text-align:center; box-shadow: var(--shadow);
  transition: transform .15s ease, box-shadow .15s ease, border-color .15s ease;
}
.tool-card:hover{ transform: translateY(-2px); box-shadow: 0 10px 26px rgba(16,24,40,.12); border-color:#d7e2f1; }
.tool-card img{ width:56px; height:56px; object-fit:contain; margin-bottom:8px; border-radius:12px; background:#f6f8ff; padding:8px; }
.tool-card h3{ font-size:1rem; margin:.4rem 0 .25rem; color:#1f2937; }
.tool-card p{ margin:0; font-size:.86rem; color:var(--muted); }
.tool-card .desc{ margin:.45rem auto .5rem; max-width:48ch; color:#475467; display:-webkit-box; -webkit-line-clamp:2; -webkit-box-orient:vertical; overflow:hidden; font-size:.88rem; }

.tool-card a{
  display:inline-block; margin:.45rem .15rem 0; padding:.45rem .75rem; border-radius:10px; background:var(--brand); color:#fff; text-decoration:none; font-size:.9rem;
  box-shadow:0 6px 18px rgba(47,111,235,.25);
}
.tool-card a:hover{ filter:brightness(1.05); }
.favorite{ cursor:pointer; font-size:1.2rem; display:inline-block; margin-top:.4rem; }
.share-btn{
  margin-left:.4rem; background:#fff; border:1px solid var(--border); border-radius:10px; padding:.35rem .6rem; cursor:pointer; color:#344054; font-size:.82rem;
}
.share-btn:hover{ background:#f6faff; border-color:#d7e2f1; }

.loading{ grid-column:1/-1; text-align:center; padding:2rem; color:#475467; }

/* ---- Footer ---- */
footer{
  background:#fff; border-top:1px solid var(--border); text-align:center; padding:16px; color:#475467;
}

/* ---- Modal ---- */
dialog::backdrop{ background: rgba(16,24,40,.4); }
dialog{ border:none; border-radius:14px; padding:0; }
.modal-card{ width:min(420px, 92vw); padding:18px; background:#fff; border:1px solid var(--border); border-radius:14px; }
.modal-card h3{ margin-bottom:8px; }
.modal-card label{ display:block; font-size:.9rem; color:#344054; margin:.4rem 0; }
.modal-card input{ width:100%; padding:10px 12px; border:1px solid var(--border); border-radius:10px; margin-top:6px; }
.modal-card input:focus{ outline:none; border-color:var(--brand); box-shadow: 0 0 0 3px rgba(47,111,235,.12); }
.modal-actions{ display:flex; gap:8px; justify-content:flex-end; margin-top:10px; }
.form-msg{ margin-top:6px; color:#b42318; min-height:1.25em; }

/* ---- Load more ---- */
#loadMoreBtn{
  grid-column:1 / -1; justify-self:center; margin:.25rem 0 1rem; padding:.6rem 1rem; border-radius:999px; background:var(--brand); border:none; color:#fff; cursor:pointer;
  box-shadow:0 8px 22px rgba(47,111,235,.25); font-size:.95rem; font-weight:600;
}
#loadMoreBtn:hover{ filter:brightness(1.05); }

/* ---- Responsive ---- */
@media (max-width: 1024px){
  main{ flex-direction:column; padding:12px; }
  #categoryList{ width:100%; display:block; }
  .category-buttons{ display:grid; grid-template-columns: repeat(auto-fit, minmax(120px,1fr)); gap:8px; }
}
@media (max-width: 640px){
  .brand-row{ flex-direction:column; gap:8px; }
  .account-area{ order:2; }
}