@import url('https://cdn.jsdelivr.net/gh/orioncactus/pretendard@v1.3.9/dist/web/static/pretendard.css');

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

:root {
  --bg:        #f5f3ff;
  --bg2:       #ffffff;
  --bg3:       #f0eefe;
  --border:    #e5e2f7;
  --border2:   #d4cfef;
  --text1:     #1a1523;
  --text2:     #5b5475;
  --text3:     #9e98b8;
  --accent:    #7c3aed;
  --accent2:   #6d28d9;
  --accent-lt: #ede9fe;
  --accent-md: #ddd6fe;
  --green:     #059669;
  --green-lt:  #d1fae5;
  --red:       #dc2626;
  --red-lt:    #fee2e2;
  --amber:     #d97706;
  --amber-lt:  #fef3c7;
  --blue:      #2563eb;
  --blue-lt:   #dbeafe;
  --radius:    8px;
  --radius-lg: 14px;
  --radius-xl: 20px;
  --shadow:    0 1px 4px rgba(124,58,237,0.07);
  --shadow-lg: 0 6px 24px rgba(124,58,237,0.10);
}

html { scroll-behavior: smooth; }
body {
  font-family: 'Pretendard', -apple-system, sans-serif;
  background: var(--bg); color: var(--text1);
  line-height: 1.5; -webkit-font-smoothing: antialiased;
  min-height: 100vh;
}
a { text-decoration: none; color: inherit; }

/* ── NAV ── */
.nav {
  background: var(--bg2); border-bottom: 1px solid var(--border);
  padding: 0 28px; height: 54px;
  display: flex; align-items: center; gap: 0;
  position: sticky; top: 0; z-index: 100;
}
.nav-logo {
  display: flex; align-items: center; gap: 9px;
  font-size: 15px; font-weight: 800; color: var(--text1);
  letter-spacing: -0.03em; margin-right: 28px; flex-shrink: 0;
}
.nav-logo-icon {
  width: 28px; height: 28px; border-radius: 8px;
  background: var(--accent); display: flex; align-items: center;
  justify-content: center; font-size: 13px; color: #fff;
}
.nav-cats { display: flex; gap: 0; flex: 1; overflow-x: auto; }
.nav-cat {
  font-size: 13px; color: var(--text2); padding: 0 16px;
  height: 54px; display: flex; align-items: center;
  border-bottom: 2px solid transparent;
  transition: color 0.15s, border-color 0.15s;
  white-space: nowrap; cursor: pointer;
}
.nav-cat:hover { color: var(--accent); }
.nav-cat.active { color: var(--accent); border-color: var(--accent); font-weight: 600; }
.nav-right { margin-left: auto; font-size: 11px; color: var(--text3); flex-shrink: 0; }

/* ── PAGE WRAPPER ── */
.page { padding: 36px 20px 64px; }
.tool-wrap { max-width: 760px; margin: 0 auto; }

/* ── TOOL HERO ── */
.tool-hero { text-align: center; margin-bottom: 28px; }
.tool-hero-cat {
  display: inline-flex; align-items: center; gap: 5px;
  font-size: 11px; font-weight: 700; text-transform: uppercase;
  letter-spacing: 0.08em; color: var(--accent);
  background: var(--accent-lt); padding: 3px 12px;
  border-radius: 100px; margin-bottom: 10px;
}
.tool-hero h1 { font-size: 26px; font-weight: 900; letter-spacing: -0.03em; margin-bottom: 6px; }
.tool-hero p { font-size: 14px; color: var(--text2); line-height: 1.7; max-width: 480px; margin: 0 auto; }

/* ── CARDS ── */
.card {
  background: var(--bg2); border: 1px solid var(--border);
  border-radius: var(--radius-lg); padding: 20px;
  box-shadow: var(--shadow); margin-bottom: 14px;
}
.card-title {
  font-size: 11px; font-weight: 700; text-transform: uppercase;
  letter-spacing: 0.07em; color: var(--text3); margin-bottom: 14px;
}

/* ── IO BOXES ── */
.io-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; margin-bottom: 14px; }
.io-box { border: 1px solid var(--border2); border-radius: var(--radius-lg); overflow: hidden; }
.io-header {
  background: var(--bg3); padding: 8px 14px;
  display: flex; align-items: center; justify-content: space-between;
  border-bottom: 1px solid var(--border);
}
.io-label { font-size: 11px; font-weight: 700; text-transform: uppercase; letter-spacing: 0.06em; color: var(--text3); }
.io-actions { display: flex; gap: 5px; }
.code-area {
  width: 100%; min-height: 180px; padding: 14px 16px;
  border: none; outline: none; resize: vertical;
  font-size: 13px; font-family: 'Courier New', monospace;
  line-height: 1.7; background: var(--bg2); color: var(--text1);
}
.code-area::placeholder { color: var(--text3); }
.code-area[readonly] { background: #faf9ff; }
.code-area.ok { background: #f0fdf4; }
.code-area.err { background: #fff8f8; color: var(--red); }

/* ── CONVERT BUTTON (center action) ── */
.convert-center { text-align: center; margin: 8px 0 16px; }
.convert-btn {
  display: inline-flex; align-items: center; gap: 8px;
  background: var(--accent); color: #fff; border: none;
  border-radius: 100px; padding: 11px 28px;
  font-size: 14px; font-weight: 700; font-family: inherit;
  cursor: pointer; transition: background 0.15s, transform 0.1s;
  box-shadow: 0 2px 12px rgba(124,58,237,0.3);
}
.convert-btn:hover { background: var(--accent2); transform: translateY(-1px); }
.convert-btn:active { transform: translateY(0); }

/* ── BUTTONS ── */
.btn {
  display: inline-flex; align-items: center; gap: 5px;
  padding: 7px 14px; border-radius: var(--radius);
  font-size: 12px; font-weight: 600; font-family: inherit;
  cursor: pointer; transition: all 0.15s;
  border: 1px solid var(--border2); background: var(--bg2); color: var(--text2);
}
.btn:hover { background: var(--bg3); border-color: var(--border2); }
.btn-accent { background: var(--accent); color: #fff; border-color: var(--accent); }
.btn-accent:hover { background: var(--accent2); }
.btn-sm { padding: 4px 10px; font-size: 11px; }
.btn-row { display: flex; gap: 7px; flex-wrap: wrap; margin-bottom: 12px; }
.copy-btn { font-size: 11px; padding: 3px 9px; }
.copy-btn.done { background: var(--green-lt); border-color: #6ee7b7; color: #065f46; }

/* ── FORM ── */
.form-group { display: flex; flex-direction: column; gap: 5px; margin-bottom: 13px; }
.form-label { font-size: 11px; font-weight: 700; text-transform: uppercase; letter-spacing: 0.06em; color: var(--text2); }
.form-input, .form-select {
  padding: 9px 13px; border: 1px solid var(--border2); border-radius: var(--radius);
  font-size: 13px; font-family: inherit; outline: none;
  background: var(--bg2); color: var(--text1); transition: border-color 0.15s;
}
.form-input:focus, .form-select:focus { border-color: var(--accent); box-shadow: 0 0 0 3px rgba(124,58,237,0.1); }
.form-input.mono { font-family: 'Courier New', monospace; }
.form-hint { font-size: 11px; color: var(--text3); }

/* ── STATUS ── */
.status { display: flex; align-items: center; gap: 8px; font-size: 12px; font-weight: 600; padding: 8px 14px; border-radius: var(--radius); margin-bottom: 12px; }
.status-ok { background: var(--green-lt); color: #065f46; border: 1px solid #6ee7b7; }
.status-err { background: var(--red-lt); color: #991b1b; border: 1px solid #fca5a5; }
.status-idle { background: var(--bg3); color: var(--text3); border: 1px solid var(--border); }

/* ── BADGE ── */
.badge { display: inline-flex; align-items: center; padding: 2px 8px; border-radius: 100px; font-size: 11px; font-weight: 700; }
.badge-green { background: var(--green-lt); color: #065f46; }
.badge-red { background: var(--red-lt); color: #991b1b; }
.badge-accent { background: var(--accent-lt); color: #5b21b6; }
.badge-amber { background: var(--amber-lt); color: #92400e; }
.badge-blue { background: var(--blue-lt); color: #1e40af; }

/* ── INFO TABLE ── */
.info-table { width: 100%; }
.info-row { display: flex; justify-content: space-between; align-items: center; padding: 9px 0; border-bottom: 1px solid var(--border); font-size: 13px; }
.info-row:last-child { border-bottom: none; }
.info-key { color: var(--text2); font-weight: 500; }
.info-val { font-weight: 700; font-family: 'Courier New', monospace; font-size: 12px; color: var(--text1); text-align: right; }

/* ── CHECKBOX ── */
.check-row { display: flex; align-items: center; gap: 8px; font-size: 13px; color: var(--text2); cursor: pointer; margin-bottom: 7px; }
.check-row input[type=checkbox] { accent-color: var(--accent); width: 14px; height: 14px; }

/* ── RANGE ── */
.range-wrap { display: flex; align-items: center; gap: 10px; }
.range-wrap input[type=range] { flex: 1; accent-color: var(--accent); }
.range-val { font-size: 13px; font-weight: 700; min-width: 36px; text-align: right; font-variant-numeric: tabular-nums; }

/* ── RELATED TOOLS ── */
.related-section { max-width: 760px; margin: 32px auto 0; }
.related-title { font-size: 12px; font-weight: 700; text-transform: uppercase; letter-spacing: 0.08em; color: var(--text3); margin-bottom: 12px; text-align: center; }
.related-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 10px; }
.related-card {
  background: var(--bg2); border: 1px solid var(--border);
  border-radius: var(--radius-lg); padding: 14px;
  text-align: center; display: block;
  transition: border-color 0.15s, transform 0.12s;
  box-shadow: var(--shadow);
}
.related-card:hover { border-color: var(--accent); transform: translateY(-2px); }
.related-card-icon { font-size: 18px; margin-bottom: 6px; }
.related-card-name { font-size: 11px; font-weight: 700; color: var(--text1); margin-bottom: 2px; }
.related-card-cat { font-size: 10px; color: var(--text3); }

/* ── HUB GRID ── */
.hub-cats { display: flex; gap: 8px; justify-content: center; flex-wrap: wrap; margin-bottom: 24px; }
.hub-cat-btn {
  padding: 6px 16px; border-radius: 100px; font-size: 12px; font-weight: 600;
  border: 1px solid var(--border2); background: var(--bg2); color: var(--text2);
  cursor: pointer; font-family: inherit; transition: all 0.15s;
}
.hub-cat-btn.active, .hub-cat-btn:hover { background: var(--accent); color: #fff; border-color: var(--accent); }
.hub-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 12px; max-width: 860px; margin: 0 auto; }
.hub-card {
  background: var(--bg2); border: 1px solid var(--border);
  border-radius: var(--radius-lg); padding: 18px 18px 16px;
  display: block; transition: border-color 0.15s, box-shadow 0.15s, transform 0.12s;
  box-shadow: var(--shadow);
}
.hub-card:hover { border-color: var(--accent); box-shadow: var(--shadow-lg); transform: translateY(-2px); }
.hub-card-icon { font-size: 22px; margin-bottom: 9px; }
.hub-card-cat { font-size: 10px; font-weight: 700; text-transform: uppercase; letter-spacing: 0.07em; color: var(--accent); margin-bottom: 3px; }
.hub-card-name { font-size: 14px; font-weight: 800; letter-spacing: -0.01em; margin-bottom: 5px; }
.hub-card-desc { font-size: 12px; color: var(--text2); line-height: 1.6; }

/* ── AD ── */
.ad-slot { background: var(--bg2); border: 1px dashed var(--border2); border-radius: var(--radius); padding: 13px; text-align: center; margin: 16px 0; }
.ad-slot p { font-size: 11px; color: var(--text3); }

/* ── FOOTER ── */
.footer { border-top: 1px solid var(--border); padding: 20px 28px; display: flex; align-items: center; justify-content: space-between; }
.footer-links { display: flex; gap: 18px; }
.footer-links a { font-size: 12px; color: var(--text3); }
.footer-links a:hover { color: var(--text2); }
.footer-copy { font-size: 12px; color: var(--text3); }

/* ── DIVIDER ── */
hr.div { border: none; border-top: 1px solid var(--border); margin: 16px 0; }

@media (max-width: 760px) {
  .io-grid { grid-template-columns: 1fr; }
  .related-grid { grid-template-columns: repeat(2, 1fr); }
  .hub-grid { grid-template-columns: repeat(2, 1fr); }
  .page { padding: 24px 16px 48px; }
  .nav { padding: 0 16px; }
  .tool-hero h1 { font-size: 22px; }
}
@media (max-width: 480px) {
  .hub-grid { grid-template-columns: 1fr; }
  .related-grid { grid-template-columns: 1fr 1fr; }
}