:root{
  --bg:#f5f6f8; --topbar:#ffffff; --ink:#222; --muted:#7a7f87;
  --accent:#7c8cff; --line:#e6e8ec; --shadow:0 1px 3px rgba(0,0,0,.12);
}
*{box-sizing:border-box}
html,body{margin:0}
body{font-family:-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,Helvetica,Arial,sans-serif;background:var(--bg);color:var(--ink);-webkit-font-smoothing:antialiased}

/* ---------- TOPBAR ---------- */
.topbar{position:sticky;top:0;z-index:30;display:flex;align-items:center;gap:16px;
  padding:10px 16px;background:var(--topbar);border-bottom:1px solid var(--line)}
.brand{display:flex;align-items:center;gap:8px;font-weight:700;font-size:19px}
.brand svg{flex:none}
.search-wrap{flex:1;max-width:680px;margin:0 auto}
#search{width:100%;padding:11px 16px;border:1px solid var(--line);border-radius:10px;
  background:#f1f3f6;font-size:15px;outline:none}
#search:focus{background:#fff;border-color:var(--accent);box-shadow:0 0 0 3px rgba(124,140,255,.15)}
.user-menu{position:relative}
.avatar{width:38px;height:38px;border-radius:50%;border:none;color:#fff;font-weight:700;
  font-size:16px;cursor:pointer;display:grid;place-items:center}
.user-pop{position:absolute;right:0;top:46px;background:#fff;border:1px solid var(--line);
  border-radius:12px;box-shadow:0 6px 24px rgba(0,0,0,.14);padding:14px;min-width:200px}
.user-pop-name{font-weight:600}
.user-pop-email{color:var(--muted);font-size:13px;margin:2px 0 10px}
.user-pop-logout{display:block;text-align:center;padding:8px;border-radius:8px;
  background:#f1f3f6;color:var(--ink);text-decoration:none;font-size:14px}
.user-pop-logout:hover{background:#e6e8ec}

/* ---------- CATEGORY BAR ---------- */
.cat-bar{display:flex;flex-wrap:wrap;gap:8px;padding:12px 16px 0;max-width:1300px;margin:0 auto}
.cat-pill{padding:6px 13px;border-radius:999px;border:1px solid var(--line);background:#fff;
  font-size:13px;cursor:pointer;color:#444}
.cat-pill:hover{border-color:var(--accent)}
.cat-pill.active{background:var(--accent);color:#fff;border-color:var(--accent)}

/* ---------- BOARD (masonry) ---------- */
main{max-width:1300px;margin:0 auto;padding:16px}
.board{columns:5 220px;column-gap:16px}
.card{break-inside:avoid;margin:0 0 16px;border-radius:14px;padding:14px;
  box-shadow:var(--shadow);position:relative;border:1px solid rgba(0,0,0,.05);
  transition:box-shadow .15s,transform .15s}
.card:hover{box-shadow:0 4px 14px rgba(0,0,0,.16)}
.card-img{width:calc(100% + 28px);margin:-14px -14px 10px;border-radius:14px 14px 0 0;
  display:block;cursor:zoom-in;object-fit:cover}
.card-title{font-weight:700;font-size:15px;margin:0 0 4px;word-break:break-word}
.card-desc{font-size:14px;line-height:1.45;white-space:pre-wrap;word-break:break-word;color:#2c2f36}
.card-links{margin-top:10px;display:flex;flex-direction:column;gap:5px}
.card-link{font-size:13px;color:#1a55c4;text-decoration:none;display:flex;align-items:center;gap:6px;
  background:rgba(255,255,255,.55);padding:5px 8px;border-radius:7px;word-break:break-all}
.card-link:hover{text-decoration:underline}
.card-cats{margin-top:10px;display:flex;flex-wrap:wrap;gap:5px}
.card-cat{font-size:11px;background:rgba(0,0,0,.07);padding:3px 8px;border-radius:999px;color:#333}
.card-foot{margin-top:12px;display:flex;align-items:center;gap:7px;font-size:12px;color:#555}
.mini-avatar{width:22px;height:22px;border-radius:50%;color:#fff;font-weight:700;font-size:11px;
  display:grid;place-items:center;flex:none}
.card-actions{position:absolute;top:8px;right:8px;display:flex;gap:4px;opacity:0;transition:opacity .15s}
.card:hover .card-actions{opacity:1}
.card-actions button{width:28px;height:28px;border:none;border-radius:7px;background:rgba(255,255,255,.7);
  cursor:pointer;font-size:14px;display:grid;place-items:center}
.card-actions button:hover{background:#fff}

.empty{text-align:center;color:var(--muted);padding:80px 20px;font-size:16px}

/* ---------- FAB ---------- */
.fab{position:fixed;right:26px;bottom:26px;width:60px;height:60px;border-radius:50%;border:none;
  background:var(--accent);color:#fff;font-size:32px;line-height:1;cursor:pointer;
  box-shadow:0 6px 20px rgba(124,140,255,.5);z-index:25}
.fab:hover{filter:brightness(1.05)}

/* ---------- EDITOR ---------- */
.overlay{position:fixed;inset:0;background:rgba(20,22,28,.45);z-index:40;display:flex;
  align-items:flex-start;justify-content:center;padding:40px 16px;overflow:auto}
.editor{background:#fff7b1;border-radius:16px;width:100%;max-width:540px;padding:18px;
  box-shadow:0 12px 40px rgba(0,0,0,.3)}
.e-title{width:100%;border:none;background:transparent;font-size:19px;font-weight:700;outline:none;margin-bottom:6px}
.e-desc{width:100%;border:none;background:transparent;font-size:15px;line-height:1.5;outline:none;
  resize:vertical;min-height:90px;font-family:inherit}
.e-image-wrap{position:relative;margin:8px 0}
.e-image-wrap img{width:100%;border-radius:10px;display:block}
.e-image-remove{position:absolute;top:8px;right:8px;width:28px;height:28px;border:none;border-radius:50%;
  background:rgba(0,0,0,.6);color:#fff;cursor:pointer}
.e-links{display:flex;flex-direction:column;gap:6px;margin:6px 0}
.e-link-row{display:flex;gap:6px}
.e-link-row input{flex:1;border:1px solid rgba(0,0,0,.15);border-radius:7px;padding:7px 9px;font-size:13px;background:rgba(255,255,255,.6)}
.e-link-row .url{flex:2}
.e-link-row button{border:none;background:rgba(0,0,0,.08);border-radius:7px;width:32px;cursor:pointer}
.e-add-link{border:none;background:transparent;color:#5b4b00;cursor:pointer;font-size:13px;padding:2px 0;text-align:left}
.e-cats{margin:10px 0}
.e-cat-chips{display:flex;flex-wrap:wrap;gap:6px;margin-bottom:6px}
.e-cat-chip{background:rgba(0,0,0,.1);border-radius:999px;padding:4px 10px;font-size:12px;display:flex;align-items:center;gap:6px}
.e-cat-chip button{border:none;background:none;cursor:pointer;font-size:13px;line-height:1}
.e-cat-input{width:100%;border:1px solid rgba(0,0,0,.15);border-radius:7px;padding:7px 9px;font-size:13px;background:rgba(255,255,255,.6)}
.e-bottom{display:flex;align-items:center;justify-content:space-between;gap:10px;margin-top:14px;flex-wrap:wrap}
.e-colors{display:flex;gap:6px;flex-wrap:wrap}
.swatch{width:24px;height:24px;border-radius:50%;cursor:pointer;border:2px solid rgba(0,0,0,.12)}
.swatch.active{outline:2px solid #333;outline-offset:1px}
.e-actions{display:flex;align-items:center;gap:8px}
.e-img-btn{cursor:pointer;font-size:18px;padding:4px}
.e-delete,.e-cancel{border:none;background:transparent;cursor:pointer;font-size:14px;padding:8px;border-radius:8px}
.e-delete:hover,.e-cancel:hover{background:rgba(0,0,0,.08)}
.e-error{color:#b00020;font-size:13px;margin:8px 0 0;min-height:16px}

/* ---------- BUTTONS / AUTH ---------- */
.btn-primary{background:var(--accent);color:#fff;border:none;border-radius:9px;padding:9px 18px;
  font-size:14px;font-weight:600;cursor:pointer}
.btn-primary:hover{filter:brightness(1.05)}
.btn-primary:disabled{opacity:.6;cursor:default}
.hidden{display:none !important}

.auth-body{display:grid;place-items:center;min-height:100vh;background:linear-gradient(135deg,#eef0ff,#f5f6f8)}
.auth-card{background:#fff;border-radius:18px;box-shadow:0 10px 40px rgba(0,0,0,.12);
  padding:32px;width:100%;max-width:380px}
.auth-logo{display:flex;align-items:center;gap:10px}
.auth-logo h1{margin:0;font-size:26px}
.auth-sub{color:var(--muted);font-size:14px;margin:8px 0 20px}
.auth-tabs{display:flex;gap:6px;background:#f1f3f6;border-radius:10px;padding:4px;margin-bottom:18px}
.auth-tab{flex:1;border:none;background:transparent;padding:9px;border-radius:8px;cursor:pointer;font-size:14px;font-weight:600;color:#666}
.auth-tab.active{background:#fff;color:var(--ink);box-shadow:var(--shadow)}
.auth-form{display:flex;flex-direction:column;gap:12px}
.auth-form label{display:flex;flex-direction:column;gap:5px;font-size:13px;color:#555;font-weight:600}
.auth-form input{border:1px solid var(--line);border-radius:9px;padding:10px 12px;font-size:15px;outline:none}
.auth-form input:focus{border-color:var(--accent);box-shadow:0 0 0 3px rgba(124,140,255,.15)}
.auth-form .btn-primary{margin-top:6px;padding:11px}
.auth-error{color:#b00020;font-size:13px;min-height:18px;margin:12px 0 0;text-align:center}

/* ---------- LIGHTBOX ---------- */
.lightbox{position:fixed;inset:0;background:rgba(0,0,0,.85);z-index:60;display:flex;align-items:center;justify-content:center;padding:30px}
.lightbox img{max-width:100%;max-height:100%;border-radius:8px}
.lightbox-close{position:absolute;top:18px;right:22px;background:none;border:none;color:#fff;font-size:30px;cursor:pointer}

@media(max-width:600px){
  .board{columns:2 150px;column-gap:12px}
  .search-wrap{order:3;flex-basis:100%;max-width:none}
  .topbar{flex-wrap:wrap}
}