/* ──────────────────────────────────────────────
   gemini2k 도구 모음 — 공통 디자인
   현대적·심플. Pretendard + 인디고 액센트. 정적(client-side).
   ────────────────────────────────────────────── */
:root{
  --ground:#F7F8FB; --surface:#FFFFFF; --text:#16181F; --muted:#6B7280;
  --accent:#5B5BF5; --accent-d:#4646DB; --accent-soft:#EEEEFE;
  --border:#ECEDF3; --ok:#0EA46A; --radius:16px; --maxw:1080px;
  --font:"Pretendard Variable",Pretendard,-apple-system,"Apple SD Gothic Neo","Malgun Gothic",system-ui,sans-serif;
  --shadow:0 1px 2px rgba(22,24,31,.04);
  --shadow-lg:0 20px 44px -24px rgba(22,24,31,.4);
}
*{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;}
body{margin:0;background:var(--ground);color:var(--text);font-family:var(--font);
  line-height:1.6;letter-spacing:-.01em;-webkit-font-smoothing:antialiased;}
a{color:inherit;text-decoration:none;}
button{font-family:inherit;cursor:pointer;}
:focus-visible{outline:2px solid var(--accent);outline-offset:2px;border-radius:8px;}

/* ── 헤더 ── */
.top{position:sticky;top:0;z-index:30;background:rgba(247,248,251,.82);
  backdrop-filter:saturate(150%) blur(12px);-webkit-backdrop-filter:saturate(150%) blur(12px);
  border-bottom:1px solid var(--border);}
.top-in{max-width:var(--maxw);margin:0 auto;display:flex;align-items:center;gap:1rem;padding:.8rem 1.4rem;}
.logo{display:flex;align-items:center;gap:.5rem;font-weight:800;font-size:1.12rem;letter-spacing:-.03em;}
.logo .mk{width:30px;height:30px;display:block;flex-shrink:0;}
.top nav{margin-left:auto;display:flex;gap:.9rem;align-items:center;font-size:.92rem;color:var(--muted);font-weight:500;}
.top nav a{white-space:nowrap;flex-shrink:0;}
.top nav a:hover{color:var(--text);}
.logo{white-space:nowrap;}
#langsel{flex-shrink:0;}
@media(max-width:560px){ .logo{font-size:.98rem;} .top nav{gap:.55rem;} .top-in{gap:.6rem;padding:.7rem 1rem;} }

/* ── 히어로 ── */
.hero{text-align:center;padding:4.5rem 1.4rem 2.5rem;position:relative;overflow:hidden;}
.hero::before{content:"";position:absolute;inset:-50% 0 auto 0;height:460px;
  background:radial-gradient(50% 60% at 50% 0%,rgba(91,91,245,.14),transparent 70%);pointer-events:none;}
.hero .ey{position:relative;font-size:.78rem;font-weight:700;letter-spacing:.16em;text-transform:uppercase;color:var(--accent);margin-bottom:.9rem;}
.hero h1{position:relative;margin:0 0 .8rem;font-size:clamp(2rem,5.5vw,3.1rem);font-weight:800;letter-spacing:-.04em;line-height:1.08;}
.hero p{position:relative;max-width:30rem;margin:0 auto;color:var(--muted);font-size:1.05rem;}
.search{position:relative;max-width:30rem;margin:1.8rem auto 0;}
.search input{width:100%;padding:.85rem 1.1rem;border:1px solid var(--border);border-radius:999px;
  background:var(--surface);font-size:1rem;box-shadow:var(--shadow);}
.search input:focus{outline:none;border-color:var(--accent);box-shadow:0 0 0 3px var(--accent-soft);}

/* 카테고리 칩 */
.chips{max-width:var(--maxw);margin:0 auto;padding:.5rem 1.4rem 0;display:flex;flex-wrap:wrap;gap:.5rem;justify-content:center;}
.chip{padding:.45rem .95rem;border:1px solid var(--border);border-radius:999px;background:var(--surface);
  color:var(--muted);font-size:.9rem;font-weight:600;cursor:pointer;transition:.15s;}
.chip:hover{border-color:var(--accent);color:var(--accent);}
.chip.on{background:var(--accent);border-color:var(--accent);color:#fff;}

/* ── 도구 그리드 ── */
.wrap{max-width:var(--maxw);margin:0 auto;padding:1rem 1.4rem 5rem;}
.grid{display:grid;grid-template-columns:repeat(3,1fr);gap:1.2rem;}
@media(max-width:820px){.grid{grid-template-columns:repeat(2,1fr);}}
@media(max-width:520px){.grid{grid-template-columns:1fr;}}
.tool{display:flex;gap:1rem;align-items:flex-start;background:var(--surface);
  border:1px solid var(--border);border-radius:var(--radius);padding:1.3rem;box-shadow:var(--shadow);
  transition:transform .16s ease,box-shadow .16s ease,border-color .16s ease;}
.tool:hover{transform:translateY(-4px);box-shadow:var(--shadow-lg);border-color:#DFE0EA;}
.tool .ic{flex-shrink:0;width:46px;height:46px;border-radius:12px;display:grid;place-items:center;font-size:1.5rem;}
.tool h3{margin:0 0 .25rem;font-size:1.05rem;font-weight:700;letter-spacing:-.02em;}
.tool p{margin:0;color:var(--muted);font-size:.88rem;line-height:1.5;}
.c-blue{background:#EAF1FF;} .c-green{background:#E6F7EF;} .c-violet{background:#F0EBFF;}
.c-amber{background:#FFF3E0;} .c-rose{background:#FCE9EF;} .c-cyan{background:#E4F6F8;}

/* ── 도구 페이지 ── */
.toolwrap{max-width:720px;margin:0 auto;padding:1.4rem 1.4rem 5rem;}
.back{display:inline-flex;align-items:center;gap:.3rem;color:var(--muted);font-size:.9rem;font-weight:600;margin:.6rem 0 1.4rem;}
.back:hover{color:var(--accent);}
.toolwrap h1{font-size:clamp(1.6rem,3.5vw,2.1rem);font-weight:800;letter-spacing:-.03em;margin:0 0 .4rem;}
.toolwrap .sub{color:var(--muted);margin:0 0 1.8rem;font-size:.98rem;}
.card{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);
  padding:1.4rem;box-shadow:var(--shadow);margin-bottom:1.2rem;}
label{display:block;font-size:.85rem;font-weight:600;color:var(--muted);margin-bottom:.45rem;}
input[type=text],input[type=url],input[type=number],input[type=date],textarea,select{
  width:100%;padding:.75rem .85rem;border:1px solid var(--border);border-radius:10px;
  background:#fff;font-size:1rem;font-family:inherit;color:var(--text);}
input:focus,textarea:focus,select:focus{outline:none;border-color:var(--accent);box-shadow:0 0 0 3px var(--accent-soft);}
textarea{min-height:200px;resize:vertical;line-height:1.7;}
.btn{display:inline-flex;align-items:center;justify-content:center;gap:.4rem;padding:.75rem 1.3rem;
  border:0;border-radius:10px;background:var(--accent);color:#fff;font-weight:700;font-size:.95rem;
  transition:background .15s,transform .05s;}
.btn:hover{background:var(--accent-d);} .btn:active{transform:translateY(1px);}
.btn-ghost{background:#fff;color:var(--text);border:1px solid var(--border);}
.btn-ghost:hover{background:#fff;border-color:var(--accent);color:var(--accent);}
.row{display:flex;gap:.7rem;flex-wrap:wrap;}
.row .btn{flex:0 0 auto;}

/* 통계 카드 (글자수 등) */
.stats{display:grid;grid-template-columns:repeat(4,1fr);gap:.8rem;margin-top:1rem;}
@media(max-width:560px){.stats{grid-template-columns:repeat(2,1fr);}}
.stat{background:var(--surface);border:1px solid var(--border);border-radius:12px;padding:1rem;text-align:center;}
.stat .n{font-size:1.5rem;font-weight:800;letter-spacing:-.02em;color:var(--accent);}
.stat .l{font-size:.78rem;color:var(--muted);margin-top:.2rem;}

/* 결과 박스 */
.result{display:flex;align-items:center;gap:.6rem;background:var(--accent-soft);border:1px solid #DAD9FB;
  border-radius:12px;padding:.9rem 1rem;font-size:1.05rem;font-weight:700;word-break:break-all;}
.result.big{font-size:1.3rem;}
.result .val{flex:1;font-family:ui-monospace,SFMono-Regular,Menlo,monospace;}

/* 슬라이더/체크박스 */
input[type=range]{width:100%;accent-color:var(--accent);}
.checks{display:flex;flex-wrap:wrap;gap:1rem;margin-top:.3rem;}
.chk{display:flex;align-items:center;gap:.45rem;font-size:.95rem;font-weight:500;color:var(--text);}
.chk input{width:1.1rem;height:1.1rem;accent-color:var(--accent);}

/* QR */
#qrbox{display:grid;place-items:center;min-height:240px;background:#fff;border:1px dashed var(--border);border-radius:12px;padding:1rem;}
#qrbox canvas,#qrbox img{max-width:100%;height:auto;}

/* 토스트 */
.toast{position:fixed;left:50%;bottom:2rem;transform:translateX(-50%) translateY(20px);
  background:var(--text);color:#fff;padding:.7rem 1.2rem;border-radius:999px;font-size:.9rem;font-weight:600;
  opacity:0;pointer-events:none;transition:opacity .2s,transform .2s;z-index:50;}
.toast.show{opacity:1;transform:translateX(-50%) translateY(0);}

/* 푸터 */
.foot{border-top:1px solid var(--border);background:var(--surface);}
.foot-in{max-width:var(--maxw);margin:0 auto;padding:2rem 1.4rem;display:flex;flex-wrap:wrap;gap:.8rem;
  align-items:center;color:var(--muted);font-size:.88rem;}
.foot a{color:var(--muted);} .foot a:hover{color:var(--accent);}
.foot .sp{margin-left:auto;}
.hint{font-size:.85rem;color:var(--muted);margin-top:.6rem;}