/* ═══════════════════════════════════════
   KIT: Gradient — Colorful Mesh
   컬러풀 메시 그라데가 주인공 · 큰 그라데 면 · 부드러운 라운드(18~20px)
   흰/반투명 카드 + 컬러 그림자 · 약간의 글래스 · Sora
   ※ 색은 _tokens.css(data-theme)가 관장. 이 파일은 레이아웃·타이포·형태만.
═══════════════════════════════════════ */
:root {
  /* shape & motion (킷 고유) */
  --r-1: 12px; --r-2: 14px; --r-3: 16px; --r-4: 18px; --r-5: 20px;
  --sh-1: 0 1px 2px rgba(15,23,42,.04);
  --sh-2: 0 8px 24px color-mix(in srgb, var(--primary) 12%, transparent);
  --sh-3: 0 14px 36px color-mix(in srgb, var(--primary) 16%, transparent);
  --sh-4: 0 24px 56px color-mix(in srgb, var(--primary) 20%, transparent);
  --ease: cubic-bezier(.4,0,.2,1);
  --ease-out: cubic-bezier(.16,1,.3,1);
  --t1: 160ms; --t2: 320ms;
  /* legacy compat (client_info / user_agent inline styles) */
  --bg-card: var(--surface); --glass-border: var(--border);
  --glass-shadow: 0 12px 32px color-mix(in srgb, var(--primary) 14%, transparent);
  --accent-primary: var(--primary); --accent-gradient: var(--grad);
  --text-primary: var(--text); --text-secondary: var(--text-2); --text-muted: var(--text-3);
  --radius-md: 14px; --radius-lg: 18px;
}

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

body {
  font-family: 'Sora', -apple-system, BlinkMacSystemFont, system-ui, sans-serif;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  color: var(--text);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: 0 20px 72px;
  overflow-x: hidden;
  background:
    radial-gradient(900px 700px at 8% -6%, color-mix(in srgb, var(--primary) 28%, transparent), transparent 58%),
    radial-gradient(800px 640px at 96% 2%, color-mix(in srgb, var(--accent) 26%, transparent), transparent 55%),
    radial-gradient(760px 620px at 50% 108%, color-mix(in srgb, var(--primary) 22%, transparent), transparent 60%),
    radial-gradient(680px 560px at 88% 78%, color-mix(in srgb, var(--accent) 20%, transparent), transparent 58%),
    radial-gradient(620px 520px at 4% 88%, color-mix(in srgb, var(--primary) 18%, transparent), transparent 60%),
    var(--bg);
  background-attachment: fixed;
}

.stars, .star { display: none !important; }

/* ─── GLOBAL HEADER (glass, sticky) ─── */
.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  width: 100vw;
  margin-bottom: 8px;
  border-bottom: 1px solid color-mix(in srgb, var(--text-strong) 8%, transparent);
  background: color-mix(in srgb, var(--surface) 62%, transparent);
  backdrop-filter: blur(18px) saturate(1.4);
  -webkit-backdrop-filter: blur(18px) saturate(1.4);
}
.site-header__inner {
  max-width: 1040px;
  margin: 0 auto;
  height: 62px;
  padding: 0 20px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.site-header__logo {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
  color: var(--text-strong);
  font-weight: 800;
  font-size: 1.18rem;
  letter-spacing: -0.03em;
}
.site-header__logo .logo-badge {
  width: 34px; height: 34px;
  display: inline-flex; align-items: center; justify-content: center;
  border-radius: 11px;
  background: var(--grad);
  color: #fff;
  box-shadow: 0 6px 16px var(--primary-glow);
}
.site-header__logo .logo-badge svg { width: 18px; height: 18px; }
.site-header__logo .accent { color: var(--primary); }
.site-header__logo .logo-text { display: inline-flex; flex-direction: column; line-height: 1.12; gap: 1px; }
.site-header__logo .logo-main { font-size: 1.1rem; font-weight: 800; letter-spacing: -0.03em; color: var(--text-strong); }
.site-header__logo .logo-sub { font-size: 0.6rem; font-weight: 700; letter-spacing: 0.16em; color: var(--text-3); }
.site-header__nav { display: flex; align-items: center; gap: 22px; }
.site-header__nav a {
  font-size: 0.86rem; font-weight: 600; color: var(--text-2);
  text-decoration: none; transition: color var(--t1) var(--ease);
}
.site-header__nav a:hover { color: var(--primary); }
@media (max-width: 560px) { .site-header__nav { display: none; } }

/* ─── HERO ─── */
.hero {
  width: 100%;
  max-width: 760px;
  margin: 48px 0 8px;
  text-align: center;
}
.hero-icon {
  font-size: 1.6rem;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 70px; height: 70px;
  margin-bottom: 24px;
  background: var(--grad);
  color: #fff;
  border-radius: 22px;
  box-shadow: 0 16px 38px var(--primary-glow);
}
.hero-icon svg { width: 32px; height: 32px; }
.hero h1 {
  font-size: clamp(2.3rem, 6.4vw, 3.6rem);
  font-weight: 800;
  color: var(--text-strong);
  letter-spacing: -0.045em;
  line-height: 1.14;
  margin-bottom: 20px;
}
.hero h1 .grad {
  background: var(--grad);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}
.hero p {
  font-size: 1.05rem;
  color: var(--text-2);
  line-height: 1.75;
  max-width: 560px;
  margin: 0 auto;
  word-break: keep-all;
}
.hero .hero-tail { margin-top: 14px; font-size: 0.9rem; color: var(--text-3); }

/* ─── SECTION LABEL (그라데 바 + 라벨) ─── */
.section-label {
  width: 100%; max-width: 1040px;
  display: flex; align-items: center; gap: 16px;
  margin: 48px 0 22px;
}
.section-label::before {
  content: ''; width: 32px; height: 4px; flex: 0 0 auto;
  border-radius: 99px; background: var(--grad);
}
.section-label::after {
  content: ''; flex: 1; height: 1px;
  background: color-mix(in srgb, var(--primary) 22%, transparent);
}
.section-label span {
  font-size: 0.92rem; font-weight: 700; color: var(--text-strong);
  letter-spacing: -0.01em;
}

/* ─── FEATURE GRID (컬러 아이콘 카드) ─── */
.feature-grid {
  width: 100%;
  max-width: 1040px;
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 18px;
}
@media (min-width: 720px) { .feature-grid { grid-template-columns: repeat(3, 1fr); } }

.feature-card {
  position: relative;
  background: color-mix(in srgb, var(--surface) 86%, transparent);
  border: 1.5px solid color-mix(in srgb, var(--text-strong) 7%, transparent);
  border-radius: var(--r-5);
  padding: 28px 24px;
  display: flex;
  flex-direction: column;
  text-decoration: none;
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  box-shadow: var(--sh-2);
  transition:
    transform var(--t2) var(--ease-out),
    box-shadow var(--t2) var(--ease-out),
    border-color var(--t1) var(--ease);
}
.feature-card:hover {
  transform: translateY(-5px);
  border-color: color-mix(in srgb, var(--primary) 32%, transparent);
  box-shadow: var(--sh-4);
}
.feature-icon {
  width: 54px; height: 54px;
  display: inline-flex; align-items: center; justify-content: center;
  border-radius: 17px;
  margin-bottom: 18px;
  color: #fff;
  background: var(--grad);
  box-shadow: 0 8px 20px var(--primary-glow);
}
.feature-icon svg { width: 26px; height: 26px; }
/* 아이콘 배지 색상 변형 — 각자 다른 컬러 그라데 면 */
.ic-blue    { background: linear-gradient(135deg, #3B82F6, #06B6D4); box-shadow: 0 8px 20px color-mix(in srgb, #3B82F6 38%, transparent); }
.ic-emerald { background: linear-gradient(135deg, #10B981, #34D399); box-shadow: 0 8px 20px color-mix(in srgb, #10B981 38%, transparent); }
.ic-amber   { background: linear-gradient(135deg, #F59E0B, #FB923C); box-shadow: 0 8px 20px color-mix(in srgb, #F59E0B 38%, transparent); }
.ic-violet  { background: linear-gradient(135deg, #8B5CF6, #C084FC); box-shadow: 0 8px 20px color-mix(in srgb, #8B5CF6 38%, transparent); }
.ic-rose    { background: linear-gradient(135deg, #F43F5E, #FB7185); box-shadow: 0 8px 20px color-mix(in srgb, #F43F5E 38%, transparent); }
.ic-indigo  { background: linear-gradient(135deg, #6366F1, #818CF8); box-shadow: 0 8px 20px color-mix(in srgb, #6366F1 38%, transparent); }
.ic-sky     { background: linear-gradient(135deg, #0EA5E9, #38BDF8); box-shadow: 0 8px 20px color-mix(in srgb, #0EA5E9 38%, transparent); }
.ic-teal    { background: linear-gradient(135deg, #14B8A6, #2DD4BF); box-shadow: 0 8px 20px color-mix(in srgb, #14B8A6 38%, transparent); }

.feature-title {
  font-size: 1.08rem;
  font-weight: 700;
  color: var(--text-strong);
  letter-spacing: -0.02em;
  margin-bottom: 6px;
  transition: color var(--t1) var(--ease);
}
.feature-card:hover .feature-title { color: var(--primary); }
.feature-desc {
  font-size: 0.85rem;
  color: var(--text-3);
  line-height: 1.6;
  flex: 1;
  word-break: keep-all;
}
.feature-arrow {
  margin-top: 18px;
  display: inline-flex; align-items: center; gap: 5px;
  font-size: 0.82rem; font-weight: 700; color: var(--primary);
}
.feature-arrow svg { width: 15px; height: 15px; transition: transform var(--t1) var(--ease); }
.feature-card:hover .feature-arrow svg { transform: translateX(3px); }

/* 카드 안 보조 액션(레거시 호환) */
.card-actions { display: flex; flex-direction: column; gap: 7px; margin-top: 16px; }
.btn-link {
  display: block;
  padding: 10px 12px;
  border-radius: var(--r-1);
  text-decoration: none;
  font-size: 0.85rem;
  font-weight: 700;
  text-align: center;
  background: var(--surface-2);
  border: 1px solid transparent;
  color: var(--text-2);
  transition: all var(--t1) var(--ease);
}
.btn-link:hover { background: var(--primary-soft); color: var(--primary); }
.btn-link.primary {
  background: var(--grad);
  color: #fff;
  box-shadow: 0 6px 16px var(--primary-glow);
}
.btn-link.primary:hover { filter: brightness(1.04); transform: translateY(-1px); }

/* ─── TRUST BAR ─── */
.trust-bar {
  width: 100%; max-width: 1040px;
  margin-top: 46px; padding-top: 30px;
  border-top: 1px solid color-mix(in srgb, var(--primary) 18%, transparent);
  display: flex; flex-wrap: wrap; justify-content: center;
  gap: 18px 40px;
}
.trust-item {
  display: inline-flex; align-items: center; gap: 8px;
  font-size: 0.86rem; font-weight: 600; color: var(--text-2);
}
.trust-item svg { width: 17px; height: 17px; color: var(--primary); }

/* ─── TITLE BAR (도구 내부 페이지) ─── */
.title-bar {
  width: 100%;
  max-width: 600px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 26px 0 4px;
}
.title-bar__home {
  display: inline-flex; align-items: center; gap: 5px;
  text-decoration: none; color: var(--text-2);
  font-size: 0.86rem; font-weight: 600;
  transition: color var(--t1) var(--ease);
}
.title-bar__home:hover { color: var(--primary); }
.title-bar__cat {
  font-size: 0.66rem; font-weight: 800;
  letter-spacing: 0.08em; text-transform: uppercase;
  color: #fff;
  background: var(--grad);
  padding: 6px 13px;
  border-radius: 99px;
  box-shadow: 0 4px 12px var(--primary-glow);
}

/* ─── PAGE CONTAINER ─── */
.page-container {
  width: 100%;
  max-width: 600px;
  display: flex;
  flex-direction: column;
}
.page-header { text-align: center; margin: 14px 0 24px; }
.page-title {
  font-size: 1.7rem;
  font-weight: 800;
  color: var(--text-strong);
  letter-spacing: -0.035em;
  margin-bottom: 8px;
}
.page-sub { font-size: 0.9rem; color: var(--text-2); }

/* ─── CONVERTER ─── */
.conv-card {
  background: color-mix(in srgb, var(--surface) 86%, transparent);
  border: 1.5px solid color-mix(in srgb, var(--text-strong) 7%, transparent);
  border-radius: var(--r-5);
  padding: 24px;
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  box-shadow: var(--sh-2);
  display: flex;
  flex-direction: column;
  gap: 10px;
  margin-bottom: 18px;
}
.conv-row { display: grid; grid-template-columns: 1fr 150px; gap: 10px; }
.conv-input {
  width: 100%;
  padding: 16px 18px;
  font-family: inherit;
  font-size: 1.25rem;
  font-weight: 700;
  text-align: right;
  background: var(--surface-2);
  border: 1.5px solid var(--border);
  border-radius: var(--r-2);
  color: var(--text-strong);
  outline: none;
  font-variant-numeric: tabular-nums;
  transition: all var(--t1) var(--ease);
  -moz-appearance: textfield;
}
.conv-input::-webkit-outer-spin-button,
.conv-input::-webkit-inner-spin-button { -webkit-appearance: none; margin: 0; }
.conv-input:focus { border-color: var(--primary); background: #fff; box-shadow: 0 0 0 4px var(--primary-alpha); }
.conv-input--out {
  background: var(--grad);
  border-color: transparent;
  color: #fff;
  -webkit-text-fill-color: #fff;
  box-shadow: 0 8px 22px var(--primary-glow);
}
.conv-sel-wrap { position: relative; }
.conv-sel-wrap::after {
  content: '▾'; position: absolute; right: 14px; top: 50%; transform: translateY(-50%);
  color: var(--text-3); font-size: 0.8rem; pointer-events: none;
}
.conv-select {
  width: 100%; height: 100%;
  padding: 0 32px 0 14px;
  font-family: inherit;
  font-size: 0.92rem;
  font-weight: 700;
  color: var(--text-strong);
  background: var(--surface-2);
  border: 1.5px solid var(--border);
  border-radius: var(--r-2);
  outline: none;
  cursor: pointer;
  appearance: none; -webkit-appearance: none; -moz-appearance: none;
  transition: all var(--t1) var(--ease);
}
.conv-select:focus { border-color: var(--primary); box-shadow: 0 0 0 4px var(--primary-alpha); }

.conv-swap {
  align-self: center;
  width: 44px; height: 44px;
  display: inline-flex; align-items: center; justify-content: center;
  border-radius: 50%;
  background: var(--grad);
  color: #fff;
  border: 3px solid var(--surface);
  box-shadow: 0 8px 20px var(--primary-glow);
  cursor: pointer;
  margin: -4px 0;
  transition: transform var(--t1) var(--ease);
}
.conv-swap:hover { transform: rotate(180deg); }
.conv-swap svg { width: 18px; height: 18px; }

.conv-eq {
  text-align: center;
  font-size: 1.02rem;
  color: var(--text-2);
  padding: 16px;
  background: var(--surface-2);
  border: 1px solid color-mix(in srgb, var(--text-strong) 6%, transparent);
  border-radius: var(--r-3);
  margin-bottom: 18px;
  word-break: break-all;
  font-variant-numeric: tabular-nums;
}
.conv-eq b { color: var(--text-strong); font-weight: 800; }
.conv-eq b.hl { color: var(--primary); }

.conv-table-wrap {
  background: color-mix(in srgb, var(--surface) 86%, transparent);
  border: 1.5px solid color-mix(in srgb, var(--text-strong) 7%, transparent);
  border-radius: var(--r-5);
  padding: 8px 22px 14px;
  box-shadow: var(--sh-2);
  margin-bottom: 16px;
}
.conv-table-title {
  font-size: 0.78rem; font-weight: 700; color: var(--text-3);
  text-transform: uppercase; letter-spacing: 0.08em;
  padding: 14px 2px 6px;
}
.conv-table { width: 100%; border-collapse: collapse; }
.conv-table td { padding: 12px 2px; border-bottom: 1px solid color-mix(in srgb, var(--text-strong) 6%, transparent); font-size: 0.92rem; }
.conv-table tr:last-child td { border-bottom: none; }
.conv-table .cu { color: var(--text-2); }
.conv-table .cu .cs { color: var(--text-3); font-size: 0.8rem; margin-left: 4px; }
.conv-table .cv { text-align: right; color: var(--text-strong); font-weight: 700; font-variant-numeric: tabular-nums; }
.conv-table tr.active td { background: var(--primary-tint); }
.conv-table tr.active .cv { color: var(--primary); }

@media (max-width: 480px) {
  .conv-row { grid-template-columns: 1fr 124px; }
  .conv-input { font-size: 1.1rem; padding: 14px; }
  .conv-select { font-size: 0.84rem; }
}

/* ─── RESULT ─── */
.calc-result {
  position: relative;
  background: color-mix(in srgb, var(--surface) 88%, transparent);
  border: 1.5px solid color-mix(in srgb, var(--primary) 22%, transparent);
  border-radius: var(--r-5);
  padding: 32px 28px;
  margin-bottom: 16px;
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  box-shadow: var(--sh-3);
  overflow: hidden;
}
.calc-result::before {
  content: ''; position: absolute; inset: 0 0 auto 0; height: 5px; background: var(--grad);
}
.result-label {
  font-size: 0.74rem; font-weight: 700; color: var(--text-3);
  text-transform: uppercase; letter-spacing: 0.1em;
  text-align: center; margin-bottom: 10px;
}
.result-main {
  font-size: clamp(2.1rem, 7vw, 2.7rem);
  font-weight: 800;
  letter-spacing: -0.04em;
  text-align: center;
  background: var(--grad);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  line-height: 1.15;
  word-break: keep-all;
}
.result-main .unit {
  -webkit-text-fill-color: var(--text-2);
  color: var(--text-2);
  font-size: 1.1rem;
  font-weight: 700;
  margin-left: 5px;
}
.result-sub { text-align: center; font-size: 0.85rem; color: var(--text-3); margin-top: 8px; }

.result-rows { margin-top: 24px; border-top: 1px solid color-mix(in srgb, var(--text-strong) 8%, transparent); }
.result-row {
  display: flex; justify-content: space-between; align-items: center;
  padding: 13px 2px;
  border-bottom: 1px solid color-mix(in srgb, var(--text-strong) 6%, transparent);
  font-size: 0.9rem;
}
.result-row .rk { color: var(--text-2); }
.result-row .rv { color: var(--text-strong); font-weight: 700; font-variant-numeric: tabular-nums; }
.result-row.minus .rv { color: var(--err); }
.result-row.total { padding-top: 16px; border-bottom: none; }
.result-row.total .rk { font-weight: 800; color: var(--text-strong); }
.result-row.total .rv { font-weight: 800; font-size: 1.08rem; color: var(--primary); }

.calc-note {
  font-size: 0.78rem;
  color: var(--text-3);
  line-height: 1.7;
  background: var(--surface-2);
  border: 1px solid color-mix(in srgb, var(--text-strong) 6%, transparent);
  border-radius: var(--r-3);
  padding: 16px 18px;
  margin-bottom: 16px;
  word-break: keep-all;
}
.calc-note b { color: var(--text-2); font-weight: 700; }

/* ─── START BUTTON ─── */
.start-button {
  width: 100%;
  padding: 16px;
  font-family: inherit;
  font-size: 1rem;
  font-weight: 700;
  letter-spacing: -0.01em;
  color: #fff;
  background: var(--grad);
  border: none;
  border-radius: var(--r-2);
  cursor: pointer;
  box-shadow: 0 10px 26px var(--primary-glow);
  margin-top: 6px;
  transition: all var(--t1) var(--ease);
}
.start-button:hover { transform: translateY(-2px); box-shadow: 0 14px 34px var(--primary-glow); }

/* ─── AD ─── */
/* 사이즈별 행 분리: .ad-grid=행 세로 스택, .ad-row=같은 사이즈끼리 한 줄(컨테이너 폭이 개수 제한).
   728×90→1개/행, 250×250→2개/행, 320×50→2개/행(4개=2×2). 래퍼에 border-radius/overflow 금지. */
.ad-grid { display: flex; flex-direction: column; align-items: center; gap: 14px; margin-top: 36px; width: 100%; }
.ad-row { display: flex; flex-wrap: wrap; justify-content: center; gap: 12px; width: 100%; }
.ad-cell { min-height: 50px; }

/* ─── FOOTER ─── */
.site-footer {
  width: 100%;
  max-width: 1040px;
  margin-top: 36px;
  padding: 24px 16px;
  border-top: 1px solid color-mix(in srgb, var(--primary) 16%, transparent);
  text-align: center;
}
.site-footer a { color: var(--text-3); font-size: 0.82rem; text-decoration: none; transition: color var(--t1) var(--ease); }
.site-footer a:hover { color: var(--primary); }
.footer-divider { color: var(--border-2); margin: 0 10px; }

/* ─── ANIMATIONS ─── */
.animate-fade-in { animation: fadeIn 0.6s var(--ease-out) both; }
.animate-slide-up { animation: slideUp 0.6s var(--ease-out) both; }
@keyframes fadeIn { from { opacity: 0; } to { opacity: 1; } }
@keyframes slideUp { from { opacity: 0; transform: translateY(20px); } to { opacity: 1; transform: translateY(0); } }

/* ─── RESPONSIVE ─── */
@media (max-width: 480px) {
  body { padding: 0 14px 64px; }
  .hero { margin-top: 34px; }
  .calc-result { padding: 26px 20px; }
  .feature-grid { gap: 14px; }
  .feature-card { padding: 24px 20px; }
}

/* ═══════════════════════════════════════════════════════════
   AG HASH — 프로젝트 전용 (Gradient 킷 변형 · cipher 인디고→시안)
   해시 워크벤치 · 알고리즘 사전(hub/detail) · 글래스 카드
   해시값은 모노(JetBrains Mono), UI는 Sora.
═══════════════════════════════════════════════════════════ */

/* 헤더 컨트롤 (테마 토글 · 언어) */
.theme-btn {
  display: inline-flex; align-items: center; justify-content: center;
  width: 38px; height: 38px;
  border-radius: 12px;
  border: 1.5px solid color-mix(in srgb, var(--text-strong) 8%, transparent);
  background: color-mix(in srgb, var(--surface) 70%, transparent);
  color: var(--text-2); cursor: pointer;
  transition: all var(--t1) var(--ease);
}
.theme-btn:hover { color: var(--primary); border-color: color-mix(in srgb, var(--primary) 40%, transparent); }
.theme-btn svg { width: 17px; height: 17px; }
.lang-select {
  font-family: inherit; font-size: 0.82rem; font-weight: 600;
  color: var(--text-2);
  background: color-mix(in srgb, var(--surface) 70%, transparent);
  border: 1.5px solid color-mix(in srgb, var(--text-strong) 8%, transparent);
  border-radius: 12px;
  padding: 8px 10px; cursor: pointer; outline: none;
  transition: all var(--t1) var(--ease);
}
.lang-select:hover { color: var(--primary); border-color: color-mix(in srgb, var(--primary) 40%, transparent); }
.lang-select:focus { border-color: var(--primary); box-shadow: 0 0 0 4px var(--primary-alpha); }
.site-header__nav { gap: 16px; }
@media (max-width: 560px) {
  .site-header__nav { display: flex; gap: 8px; }
  .site-header__nav a { display: none; }
  .lang-select { font-size: 0.76rem; padding: 7px 8px; }
}

/* 도구 컨테이너 & 히어로 */
.tool-container { width: 100%; max-width: 660px; margin: 0 auto; display: flex; flex-direction: column; }
.tool-hero { width: 100%; max-width: 660px; margin: 44px auto 6px; text-align: center; }
.tool-hero .hero-icon { margin: 0 auto 22px; }
.tool-hero h1 {
  font-size: clamp(2rem, 5.6vw, 3rem); font-weight: 800; color: var(--text-strong);
  letter-spacing: -0.04em; line-height: 1.14; margin-bottom: 16px;
}
.tool-hero h1 .grad { background: var(--grad); -webkit-background-clip: text; background-clip: text; color: transparent; }
.tool-hero p { font-size: 1rem; color: var(--text-2); line-height: 1.72; max-width: 560px; margin: 0 auto; word-break: keep-all; }

/* 세그먼트 입력 모드 탭 (텍스트/파일) */
.seg-tabs {
  display: flex; gap: 6px; margin: 30px 0 16px;
  padding: 6px;
  background: color-mix(in srgb, var(--surface) 74%, transparent);
  border: 1.5px solid color-mix(in srgb, var(--text-strong) 7%, transparent);
  border-radius: 16px;
  backdrop-filter: blur(8px); -webkit-backdrop-filter: blur(8px);
  box-shadow: var(--sh-1);
}
.seg-tab {
  flex: 1; display: inline-flex; align-items: center; justify-content: center; gap: 7px;
  padding: 12px 10px; border-radius: 11px;
  font-family: inherit; font-size: 0.9rem; font-weight: 700;
  color: var(--text-2); background: transparent; border: none; cursor: pointer;
  transition: all var(--t1) var(--ease);
}
.seg-tab:hover { color: var(--text-strong); }
.seg-tab svg { width: 16px; height: 16px; }
.seg-tab.active { color: #fff; background: var(--grad); box-shadow: 0 6px 16px var(--primary-glow); }

/* 입력 패널 */
.io-panel { margin-bottom: 14px; }
.hash-ta {
  width: 100%; min-height: 132px; resize: vertical;
  padding: 16px 18px;
  font-family: 'JetBrains Mono', ui-monospace, SFMono-Regular, Menlo, monospace;
  font-size: 0.92rem; line-height: 1.6;
  background: color-mix(in srgb, var(--surface) 88%, transparent);
  border: 1.5px solid var(--border);
  border-radius: var(--r-3);
  color: var(--text-strong); outline: none;
  backdrop-filter: blur(6px); -webkit-backdrop-filter: blur(6px);
  transition: all var(--t1) var(--ease); word-break: break-all;
}
.hash-ta::placeholder { color: var(--text-3); }
.hash-ta:focus { border-color: var(--primary); background: #fff; box-shadow: 0 0 0 4px var(--primary-alpha); }
:root[data-theme="midnight"] .hash-ta:focus { background: var(--surface); }
.io-meta { margin-top: 8px; font-size: 0.78rem; font-weight: 600; color: var(--text-3); text-align: right; }
.io-meta.file { text-align: center; }

/* 파일 드롭존 */
.drop-zone {
  display: flex; flex-direction: column; align-items: center; justify-content: center; gap: 12px;
  min-height: 152px; padding: 28px 20px;
  background: color-mix(in srgb, var(--surface) 70%, transparent);
  border: 2px dashed color-mix(in srgb, var(--primary) 32%, var(--border));
  border-radius: var(--r-4);
  color: var(--text-2); cursor: pointer; text-align: center;
  transition: all var(--t1) var(--ease);
}
.drop-zone:hover { border-color: var(--primary); color: var(--primary); }
.drop-zone.over { border-color: var(--primary); background: var(--primary-tint); color: var(--primary); transform: scale(1.01); }
.drop-zone svg { width: 34px; height: 34px; color: var(--primary); }
.drop-zone #dropText { font-size: 0.9rem; font-weight: 700; word-break: break-all; }

/* 옵션 카드 */
.opt-card {
  background: color-mix(in srgb, var(--surface) 86%, transparent);
  border: 1.5px solid color-mix(in srgb, var(--text-strong) 7%, transparent);
  border-radius: var(--r-5); padding: 20px 22px;
  backdrop-filter: blur(8px); -webkit-backdrop-filter: blur(8px);
  box-shadow: var(--sh-2);
  margin-bottom: 14px; display: flex; flex-direction: column; gap: 16px;
}
.opt-row { display: flex; align-items: center; justify-content: space-between; gap: 14px; flex-wrap: wrap; }
.opt-label { font-size: 0.82rem; font-weight: 700; color: var(--text-2); white-space: nowrap; }
.chips { display: flex; gap: 8px; flex-wrap: wrap; }
.chip {
  padding: 9px 14px; border-radius: 99px;
  font-family: inherit; font-size: 0.8rem; font-weight: 700;
  color: var(--text-2);
  background: var(--surface-2);
  border: 1.5px solid var(--border); cursor: pointer; user-select: none;
  display: inline-flex; align-items: center; gap: 7px;
  transition: all var(--t1) var(--ease);
}
.chip:hover { border-color: color-mix(in srgb, var(--primary) 40%, transparent); color: var(--text-strong); }
.chip .dot { width: 8px; height: 8px; border-radius: 50%; background: var(--border-2); transition: all var(--t1) var(--ease); }
.chip.on { color: #fff; background: var(--grad); border-color: transparent; box-shadow: 0 4px 12px var(--primary-glow); }
.chip.on .dot { background: #fff; }
.cmp-input {
  flex: 1 1 220px; min-width: 0;
  padding: 12px 14px;
  font-family: 'JetBrains Mono', ui-monospace, monospace; font-size: 0.84rem; font-weight: 500;
  background: var(--surface-2);
  border: 1.5px solid var(--border); border-radius: var(--r-2);
  color: var(--text-strong); outline: none;
  transition: all var(--t1) var(--ease);
}
.cmp-input::placeholder { color: var(--text-3); font-weight: 400; font-family: 'Sora', sans-serif; }
.cmp-input:focus { border-color: var(--primary); background: #fff; box-shadow: 0 0 0 4px var(--primary-alpha); }
:root[data-theme="midnight"] .cmp-input:focus { background: var(--surface); }

/* 결과 패널 (글래스 카드 + 그라데 상단바) */
.term {
  position: relative;
  background: color-mix(in srgb, var(--surface) 90%, transparent);
  border: 1.5px solid color-mix(in srgb, var(--primary) 20%, transparent);
  border-radius: var(--r-5);
  backdrop-filter: blur(8px); -webkit-backdrop-filter: blur(8px);
  box-shadow: var(--sh-3); overflow: hidden; margin-bottom: 18px;
}
.term::before { content: ''; position: absolute; inset: 0 0 auto 0; height: 5px; background: var(--grad); }
.term-bar { display: flex; align-items: center; gap: 10px; padding: 16px 20px 12px; }
.term-lights { display: none; }
.term-title {
  font-size: 0.74rem; font-weight: 800; color: var(--text-3);
  letter-spacing: 0.12em; text-transform: uppercase;
}
.term-count {
  margin-left: auto; font-size: 0.74rem; font-weight: 800; color: #fff;
  background: var(--grad); padding: 4px 11px; border-radius: 99px;
  box-shadow: 0 3px 10px var(--primary-glow);
}
.term-tools { display: flex; gap: 8px; flex-wrap: wrap; padding: 0 20px 14px; }
.tool-btn {
  display: inline-flex; align-items: center; gap: 6px;
  padding: 9px 14px; border-radius: 99px;
  font-family: inherit; font-size: 0.78rem; font-weight: 700;
  color: var(--text-2); background: var(--surface-2);
  border: 1.5px solid var(--border); cursor: pointer;
  transition: all var(--t1) var(--ease);
}
.tool-btn:hover { color: var(--primary); border-color: color-mix(in srgb, var(--primary) 40%, transparent); }
.tool-btn svg { width: 14px; height: 14px; }
.tool-btn.ghost { color: var(--text-3); }
.tool-btn.ghost:hover { color: var(--err); border-color: color-mix(in srgb, var(--err) 40%, transparent); }

.out-list { padding: 4px 0 8px; }
.out-row {
  display: flex; align-items: center; gap: 12px;
  padding: 12px 20px;
  border-top: 1px solid color-mix(in srgb, var(--text-strong) 6%, transparent);
  transition: background var(--t1) var(--ease);
}
.out-row:hover { background: var(--primary-tint); }
.hash-algo {
  flex: 0 0 auto; min-width: 92px;
  font-family: 'JetBrains Mono', ui-monospace, monospace;
  font-size: 0.72rem; font-weight: 800; letter-spacing: 0.02em;
  color: var(--primary); text-transform: uppercase; padding-top: 2px;
}
.out-val {
  flex: 1; min-width: 0;
  font-family: 'JetBrains Mono', ui-monospace, monospace;
  font-size: 0.86rem; font-weight: 500; color: var(--text-strong);
  word-break: break-all; letter-spacing: 0.01em;
}
.out-copy {
  flex: 0 0 auto; display: inline-flex; align-items: center; justify-content: center;
  width: 34px; height: 34px; border-radius: 10px;
  background: transparent; border: 1.5px solid transparent; color: var(--text-3); cursor: pointer;
  transition: all var(--t1) var(--ease);
}
.out-copy:hover { color: var(--primary); border-color: var(--border); background: var(--surface-2); }
.out-copy.done { color: var(--ok); border-color: var(--ok-border); }
.out-copy svg { width: 15px; height: 15px; }
.out-row.pending .out-val, .out-row.na .out-val { color: var(--text-3); font-weight: 400; font-style: italic; font-family: 'Sora', sans-serif; }
.out-row.match { background: var(--ok-bg); box-shadow: inset 4px 0 0 var(--ok); }
.out-row.match .out-val { color: var(--ok); }
.match-tag { flex: 0 0 auto; display: inline-flex; align-items: center; justify-content: center; width: 20px; height: 20px; color: var(--ok); }
.match-tag svg { width: 16px; height: 16px; }
.out-empty { padding: 40px 20px; text-align: center; font-size: 0.88rem; color: var(--text-3); }

/* 토스트 */
.toast {
  position: fixed; left: 50%; bottom: 30px; transform: translateX(-50%) translateY(20px);
  background: var(--text-strong); color: var(--bg);
  padding: 12px 22px; border-radius: 99px;
  font-size: 0.84rem; font-weight: 700;
  opacity: 0; pointer-events: none; z-index: 100;
  box-shadow: 0 12px 32px rgba(15,23,42,.28);
  transition: all 0.28s var(--ease-out);
}
.toast.show { opacity: 1; transform: translateX(-50%) translateY(0); }

/* 정보 카드 (about 주요기능·FAQ) */
.info-block { width: 100%; max-width: 660px; margin: 30px auto 0; }
.info-block .faq-title, .features-title {
  font-size: 1.15rem; font-weight: 800; color: var(--text-strong);
  letter-spacing: -0.02em; margin-bottom: 16px; text-align: center;
}
.info-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
@media (max-width: 560px) { .info-grid { grid-template-columns: 1fr; } }
.info-item {
  background: color-mix(in srgb, var(--surface) 86%, transparent);
  border: 1.5px solid color-mix(in srgb, var(--text-strong) 7%, transparent);
  border-radius: var(--r-4); padding: 20px;
  backdrop-filter: blur(6px); -webkit-backdrop-filter: blur(6px);
  box-shadow: var(--sh-1);
}
.info-item h4 { font-size: 0.95rem; font-weight: 800; color: var(--text-strong); margin-bottom: 8px; letter-spacing: -0.01em; }
.info-item p { font-size: 0.85rem; color: var(--text-2); line-height: 1.72; word-break: keep-all; }
.info-item code {
  font-family: 'JetBrains Mono', monospace; font-size: 0.8rem; color: var(--primary);
  background: var(--primary-tint); padding: 1px 6px; border-radius: 6px;
}

/* ─── 알고리즘 사전 (hub / detail) ─── */
.algo-hub { width: 100%; max-width: 940px; margin: 0 auto; }
.algo-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(240px, 1fr)); gap: 18px; }
.algo-card {
  position: relative; display: flex; flex-direction: column;
  background: color-mix(in srgb, var(--surface) 86%, transparent);
  border: 1.5px solid color-mix(in srgb, var(--text-strong) 7%, transparent);
  border-radius: var(--r-5); padding: 24px 22px; text-decoration: none;
  backdrop-filter: blur(8px); -webkit-backdrop-filter: blur(8px);
  box-shadow: var(--sh-2);
  transition: transform var(--t2) var(--ease-out), box-shadow var(--t2) var(--ease-out), border-color var(--t1) var(--ease);
}
.algo-card:hover { transform: translateY(-5px); border-color: color-mix(in srgb, var(--primary) 32%, transparent); box-shadow: var(--sh-4); }
.algo-card__name {
  font-family: 'JetBrains Mono', monospace;
  font-size: 1.2rem; font-weight: 800; color: var(--text-strong); letter-spacing: -0.01em; margin-bottom: 6px;
}
.algo-card__tag { font-size: 0.84rem; color: var(--text-2); line-height: 1.55; flex: 1; word-break: keep-all; }
.algo-card__foot { margin-top: 16px; display: flex; align-items: center; gap: 8px; }
.badge {
  font-size: 0.68rem; font-weight: 800; letter-spacing: 0.03em;
  padding: 4px 10px; border-radius: 99px; text-transform: uppercase;
}
.badge.secure { color: #fff; background: var(--grad); }
.badge.legacy { color: var(--text-2); background: var(--surface-2); border: 1.5px solid var(--border); }
.badge.checksum { color: var(--primary); background: var(--primary-tint); }
.algo-bits { margin-left: auto; font-family: 'JetBrains Mono', monospace; font-size: 0.76rem; font-weight: 700; color: var(--text-3); }

/* detail */
.algo-detail { width: 100%; max-width: 640px; margin: 0 auto; }
.algo-lead {
  background: color-mix(in srgb, var(--surface) 88%, transparent);
  border: 1.5px solid color-mix(in srgb, var(--primary) 20%, transparent);
  border-radius: var(--r-5); padding: 26px 24px; margin-bottom: 18px;
  backdrop-filter: blur(8px); -webkit-backdrop-filter: blur(8px);
  box-shadow: var(--sh-2); position: relative; overflow: hidden;
}
.algo-lead::before { content: ''; position: absolute; inset: 0 0 auto 0; height: 5px; background: var(--grad); }
.algo-lead p { font-size: 0.94rem; color: var(--text-2); line-height: 1.8; word-break: keep-all; }
.algo-lead p + p { margin-top: 12px; }
.algo-metrics { display: grid; grid-template-columns: repeat(3, 1fr); gap: 12px; margin-bottom: 18px; }
.metric {
  background: color-mix(in srgb, var(--surface) 84%, transparent);
  border: 1.5px solid color-mix(in srgb, var(--text-strong) 7%, transparent);
  border-radius: var(--r-3); padding: 16px 14px; text-align: center;
  box-shadow: var(--sh-1);
}
.metric__k { font-size: 0.68rem; font-weight: 800; color: var(--text-3); text-transform: uppercase; letter-spacing: 0.06em; margin-bottom: 6px; }
.metric__v { font-family: 'JetBrains Mono', monospace; font-size: 1.02rem; font-weight: 800; color: var(--primary); }
.sample-box {
  background: var(--surface-2); border: 1.5px solid var(--border);
  border-radius: var(--r-3); padding: 16px 18px; margin-bottom: 18px;
}
.sample-box__k { font-size: 0.72rem; font-weight: 800; color: var(--text-3); text-transform: uppercase; letter-spacing: 0.06em; margin-bottom: 8px; }
.sample-box__v { font-family: 'JetBrains Mono', monospace; font-size: 0.82rem; font-weight: 600; color: var(--text-strong); word-break: break-all; line-height: 1.6; }
.uses-list { list-style: none; margin-bottom: 20px; }
.uses-list li {
  position: relative; padding: 9px 0 9px 26px;
  font-size: 0.88rem; color: var(--text-2); line-height: 1.6;
  border-bottom: 1px solid color-mix(in srgb, var(--text-strong) 6%, transparent);
}
.uses-list li::before { content: ''; position: absolute; left: 4px; top: 15px; width: 8px; height: 8px; border-radius: 50%; background: var(--grad); }
.try-btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  width: 100%; padding: 15px;
  font-family: inherit; font-size: 0.96rem; font-weight: 700; color: #fff;
  background: var(--grad); border: none; border-radius: var(--r-2); cursor: pointer;
  text-decoration: none; box-shadow: 0 10px 26px var(--primary-glow);
  margin-bottom: 18px; transition: all var(--t1) var(--ease);
}
.try-btn:hover { transform: translateY(-2px); box-shadow: 0 14px 34px var(--primary-glow); }
.try-btn svg { width: 18px; height: 18px; }

/* 서브 내비 (허브/사전 상단 링크 pill) */
.crumb { width: 100%; max-width: 940px; margin: 0 auto; display: flex; align-items: center; gap: 8px; padding: 24px 0 4px; flex-wrap: wrap; }
.crumb a { font-size: 0.84rem; font-weight: 600; color: var(--text-2); text-decoration: none; transition: color var(--t1) var(--ease); }
.crumb a:hover { color: var(--primary); }
.crumb .sep { color: var(--text-3); }
.crumb .cur { font-size: 0.84rem; font-weight: 700; color: var(--text-strong); }

/* 푸터 다중 링크 */
.site-footer .foot-links { display: flex; flex-wrap: wrap; justify-content: center; gap: 10px 0; }

/* RTL */
[dir="rtl"] .io-meta { text-align: left; }
[dir="rtl"] .term-count { margin-left: 0; margin-right: auto; }
[dir="rtl"] .algo-bits { margin-left: 0; margin-right: auto; }
[dir="rtl"] .uses-list li { padding: 9px 26px 9px 0; }
[dir="rtl"] .uses-list li::before { left: auto; right: 4px; }

@media (max-width: 480px) {
  .tool-hero { margin-top: 32px; }
  .opt-row { flex-direction: column; align-items: flex-start; }
  .hash-algo { min-width: 72px; font-size: 0.66rem; }
  .out-val { font-size: 0.8rem; }
  .algo-metrics { grid-template-columns: 1fr; }
}