/* ============================================
   WebToolBox - 개선된 디자인 시스템 v2
   고대비 입력 필드 / 사용자 친화적 폼 UX
   ============================================ */

@import url('https://fonts.googleapis.com/css2?family=Nunito:wght@400;600;700;800;900&family=IBM+Plex+Mono:wght@500&display=swap');

:root {
  --brand-1: #6d28d9;
  --brand-2: #059669;
  --brand-grd: linear-gradient(135deg, #6d28d9 0%, #059669 100%);
  --brand-light: #ede9fe;

  /* Backgrounds - 더 명확한 계층 구분 */
  --bg-page: #eef0f6;
  --bg-card: #ffffff;
  --bg-section: #f7f8fc;

  /* 입력 필드 - 흰 배경 + 진한 테두리 */
  --input-bg: #ffffff;
  --input-border: #9ca3af;
  --input-border-focus: #6d28d9;
  --input-shadow-focus: 0 0 0 3px rgba(109,40,217,0.15);

  /* 결과 영역 */
  --result-bg: #f0fdf4;
  --result-border: #a7f3d0;

  /* Borders */
  --border: #d1d5db;
  --border-strong: #9ca3af;

  /* Text - 높은 대비 */
  --txt-main: #111827;
  --txt-body: #374151;
  --txt-sub: #6b7280;
  --txt-faint: #9ca3af;

  /* Status */
  --success: #059669;
  --warning: #d97706;
  --danger: #dc2626;
  --info: #2563eb;

  /* Shadows */
  --shadow-xs: 0 1px 3px rgba(0,0,0,0.08);
  --shadow-card: 0 2px 8px rgba(0,0,0,0.06), 0 1px 3px rgba(0,0,0,0.08);
  --shadow-hover: 0 8px 30px rgba(109,40,217,0.12), 0 4px 12px rgba(0,0,0,0.08);
  --shadow-modal: 0 20px 60px rgba(0,0,0,0.2), 0 8px 24px rgba(0,0,0,0.12);

  --r-sm: 8px;
  --r-md: 12px;
  --r-lg: 16px;
  --r-xl: 20px;
  --r-full: 9999px;

  --font: 'Nunito', -apple-system, BlinkMacSystemFont, 'Apple SD Gothic Neo', sans-serif;
  --font-mono: 'IBM Plex Mono', monospace;
  --transition: all 0.18s cubic-bezier(.4,0,.2,1);
}

/* ─── Dark Mode ─────────────────────────────── */
html[data-theme='dark'] {
  --bg-page: #0d0d1a;
  --bg-card: #161625;
  --bg-section: #1c1c30;

  --input-bg: #1e1e33;
  --input-border: #4b5563;
  --input-border-focus: #a78bfa;
  --input-shadow-focus: 0 0 0 3px rgba(167,139,250,0.2);

  --result-bg: #0a2a1e;
  --result-border: #065f46;

  --border: #2d2d4a;
  --border-strong: #4b5563;

  --txt-main: #f9fafb;
  --txt-body: #e5e7eb;
  --txt-sub: #9ca3af;
  --txt-faint: #6b7280;

  --brand-1: #a78bfa;
  --brand-2: #34d399;
  --brand-light: rgba(167,139,250,0.12);

  --shadow-xs: 0 1px 3px rgba(0,0,0,0.4);
  --shadow-card: 0 2px 8px rgba(0,0,0,0.3), 0 1px 3px rgba(0,0,0,0.2);
  --shadow-hover: 0 8px 30px rgba(0,0,0,0.4);
  --shadow-modal: 0 20px 60px rgba(0,0,0,0.6);
}

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

html {
  font-family: var(--font);
  background: var(--bg-page);
  color: var(--txt-main);
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body { min-height: 100vh; display: flex; flex-direction: column; }

a { color: inherit; text-decoration: none; }

button, input, select, textarea {
  font-family: var(--font);
  font-size: inherit;
  color: var(--txt-main);
  border: none;
  outline: none;
  background: none;
}
button { cursor: pointer; }

.wrap { width: 100%; max-width: 1320px; margin: 0 auto; padding: 0 1.5rem; }

/* ─── Header ────────────────────────────────── */
.site-header {
  background: var(--bg-card);
  border-bottom: 2px solid var(--border);
  position: sticky; top: 0; z-index: 100;
  box-shadow: var(--shadow-xs);
}

.header-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 0.75rem 0;
  flex-wrap: nowrap;
}

.header-brand {
  display: flex; align-items: center; gap: 0.55rem;
  font-size: 1.25rem; font-weight: 900; letter-spacing: -0.04em;
  white-space: nowrap; flex-shrink: 0;
}

.brand-gem {
  width: 2.1rem; height: 2.1rem;
  border-radius: var(--r-md);
  background: var(--brand-grd);
  display: flex; align-items: center; justify-content: center;
  font-size: 1rem;
  box-shadow: 0 4px 12px rgba(109,40,217,0.3);
}

.brand-name em { color: var(--brand-1); font-style: normal; }

.header-search {
  flex: 1; max-width: 420px; min-width: 140px; position: relative;
}

.header-search input {
  width: 100%;
  padding: 0.55rem 2.2rem 0.55rem 0.95rem;
  background: var(--bg-section);
  border: 1.5px solid var(--border);
  border-radius: var(--r-full);
  font-size: 0.85rem; font-weight: 600;
  color: var(--txt-main);
  transition: var(--transition);
}

.header-search input:focus {
  border-color: var(--input-border-focus);
  background: var(--bg-card);
  box-shadow: var(--input-shadow-focus);
}

.header-search-icon {
  position: absolute; right: 0.85rem; top: 50%;
  transform: translateY(-50%);
  color: var(--txt-sub); pointer-events: none;
}

.header-actions { display: flex; align-items: center; gap: 0.5rem; flex-shrink: 0; }

.hdr-btn {
  display: inline-flex; align-items: center; gap: 0.35rem;
  padding: 0.45rem 0.75rem;
  border-radius: var(--r-md);
  font-size: 0.82rem; font-weight: 700;
  color: var(--txt-sub);
  transition: var(--transition);
  white-space: nowrap;
}
.hdr-btn:hover { background: var(--bg-section); color: var(--txt-main); }

.theme-btn {
  width: 2.1rem; height: 2.1rem;
  border-radius: var(--r-md);
  background: var(--bg-section);
  border: 1.5px solid var(--border);
  color: var(--txt-sub);
  display: flex; align-items: center; justify-content: center;
  transition: var(--transition);
  flex-shrink: 0;
}
.theme-btn:hover { border-color: var(--brand-1); color: var(--brand-1); }

/* PC 헤더 카테고리 탭: 잘리지 않고 유연하게 정렬 */
.header-tabs {
  display: flex;
  align-items: center;
  gap: 0.3rem;
  flex-wrap: wrap;
  padding: 0.45rem 0;
  border-top: 1px solid var(--border);
}

.tab-link {
  display: inline-flex; align-items: center; gap: 0.25rem;
  padding: 0.32rem 0.7rem;
  border-radius: var(--r-full);
  font-size: 0.8rem; font-weight: 700;
  color: var(--txt-sub); white-space: nowrap;
  transition: var(--transition);
  border: 1px solid transparent;
}
.tab-link:hover { background: var(--brand-light); color: var(--brand-1); border-color: rgba(109,40,217,0.2); }
.tab-link.active { background: var(--brand-light); color: var(--brand-1); font-weight: 900; border-color: var(--brand-1); }

/* 모바일 뷰포트에서는 가로 스크롤로 매끄럽게 처리 */
@media (max-width: 860px) {
  .header-tabs {
    flex-wrap: nowrap;
    overflow-x: auto;
    scrollbar-width: none;
    -webkit-overflow-scrolling: touch;
    padding-bottom: 0.5rem;
  }
  .header-tabs::-webkit-scrollbar { display: none; }
}

/* ─── Hero ───────────────────────────────────── */
.hero {
  padding: 3rem 0 2rem;
  text-align: center;
}

.hero-label {
  display: inline-block;
  font-size: 0.78rem; font-weight: 800;
  text-transform: uppercase; letter-spacing: 0.1em;
  color: var(--brand-2);
  background: rgba(5,150,105,0.1);
  border: 1.5px solid rgba(5,150,105,0.25);
  padding: 0.3rem 1rem;
  border-radius: var(--r-full);
  margin-bottom: 1.25rem;
}

.hero-title {
  font-size: 2.5rem; font-weight: 900;
  line-height: 1.2; letter-spacing: -0.03em;
  color: var(--txt-main); margin-bottom: 1rem;
}
.hero-title .accent {
  background: var(--brand-grd);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-sub {
  font-size: 1rem; color: var(--txt-sub);
  max-width: 540px; margin: 0 auto 2rem;
  line-height: 1.7; font-weight: 600;
}

.hero-search-wrap {
  position: relative; max-width: 640px;
  margin: 0 auto; z-index: 50;
}

.hero-search-inner {
  display: flex; align-items: center;
  background: var(--bg-card);
  border: 2px solid var(--border-strong);
  border-radius: var(--r-xl);
  padding: 0.5rem 0.5rem 0.5rem 1.25rem;
  box-shadow: var(--shadow-card);
  transition: var(--transition);
}
.hero-search-inner:focus-within {
  border-color: var(--brand-1);
  box-shadow: var(--input-shadow-focus), var(--shadow-hover);
}

.search-ico { color: var(--txt-faint); margin-right: 0.75rem; flex-shrink: 0; }

.hero-search-input {
  flex: 1; font-size: 1rem; font-weight: 600;
  color: var(--txt-main); background: transparent;
}
.hero-search-input::placeholder { color: var(--txt-faint); font-weight: 600; }

.hero-search-btn {
  padding: 0.7rem 1.4rem;
  border-radius: var(--r-lg);
  background: var(--brand-grd);
  color: #fff; font-weight: 800; font-size: 0.9rem;
  transition: var(--transition); flex-shrink: 0;
}
.hero-search-btn:hover { opacity: 0.88; transform: translateY(-1px); }

/* Autocomplete */
.autocomplete-dropdown {
  position: absolute; top: calc(100% + 0.5rem);
  left: 0; right: 0;
  background: var(--bg-card);
  border: 2px solid var(--border);
  border-radius: var(--r-xl);
  box-shadow: var(--shadow-modal);
  display: none; overflow: hidden; z-index: 60; text-align: left;
}
.autocomplete-dropdown.open { display: block; animation: popIn 0.15s ease-out; }

@keyframes popIn {
  from { opacity: 0; transform: translateY(-8px) scale(0.98); }
  to   { opacity: 1; transform: translateY(0) scale(1); }
}

.ac-item {
  display: flex; align-items: center; gap: 0.85rem;
  padding: 0.85rem 1.25rem;
  border-bottom: 1px solid var(--border);
  cursor: pointer; transition: var(--transition);
}
.ac-item:last-child { border-bottom: none; }
.ac-item:hover { background: var(--brand-light); }

.ac-icon {
  width: 2.2rem; height: 2.2rem;
  border-radius: var(--r-md);
  background: var(--brand-light);
  color: var(--brand-1);
  display: flex; align-items: center; justify-content: center;
  font-size: 1rem; flex-shrink: 0;
}

.ac-title { font-weight: 800; font-size: 0.9rem; }
.ac-cat {
  font-size: 0.68rem; font-weight: 800;
  padding: 0.12rem 0.5rem;
  border-radius: var(--r-full);
  background: var(--bg-section);
  color: var(--txt-sub); margin-left: 0.4rem;
}
.ac-desc { font-size: 0.78rem; color: var(--txt-sub); margin-top: 0.1rem; }

/* ─── Category Chips ─────────────────────────── */
.section-hdr {
  display: flex; align-items: center; justify-content: space-between;
  margin-bottom: 1.1rem;
}
.section-hdr-title { font-size: 1.2rem; font-weight: 900; letter-spacing: -0.02em; }
.section-hdr-note { font-size: 0.82rem; font-weight: 700; color: var(--txt-sub); }

.chip-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(110px, 1fr));
  gap: 0.6rem; margin-bottom: 2.5rem;
}

.chip {
  display: flex; flex-direction: column; align-items: center; gap: 0.35rem;
  padding: 0.85rem 0.5rem;
  border-radius: var(--r-lg);
  background: var(--bg-card);
  border: 2px solid var(--border);
  cursor: pointer; transition: var(--transition);
  box-shadow: var(--shadow-xs);
}
.chip:hover {
  border-color: var(--brand-1);
  background: var(--brand-light);
  transform: translateY(-2px);
  box-shadow: var(--shadow-card);
}
.chip.active {
  border-color: var(--brand-1);
  background: var(--brand-light);
  box-shadow: 0 0 0 1px var(--brand-1), var(--shadow-card);
}
.chip-ico { font-size: 1.5rem; }
.chip-label { font-size: 0.78rem; font-weight: 800; color: var(--txt-body); text-align: center; line-height: 1.3; }

/* ─── Tool Cards ─────────────────────────────── */
.tools-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 1.1rem; margin-bottom: 4rem;
}

.tool-card {
  background: var(--bg-card);
  border: 2px solid var(--border);
  border-radius: var(--r-xl);
  padding: 1.35rem 1.4rem;
  cursor: pointer;
  transition: var(--transition);
  box-shadow: var(--shadow-card);
  display: flex; flex-direction: column; gap: 0.65rem;
}
.tool-card:hover {
  border-color: var(--brand-1);
  transform: translateY(-3px);
  box-shadow: var(--shadow-hover);
}

.card-top { display: flex; align-items: flex-start; justify-content: space-between; }

.card-icon {
  width: 2.8rem; height: 2.8rem;
  border-radius: var(--r-md);
  background: var(--brand-light);
  border: 1.5px solid rgba(109,40,217,0.2);
  display: flex; align-items: center; justify-content: center;
  font-size: 1.3rem; font-weight: 800; color: var(--brand-1);
  font-family: var(--font-mono);
}

.fav-btn {
  font-size: 1.2rem; color: var(--txt-faint);
  padding: 0.2rem; transition: var(--transition); line-height: 1;
}
.fav-btn:hover, .fav-btn.on { color: #f59e0b; transform: scale(1.15); }

.card-cat-badge {
  font-size: 0.7rem; font-weight: 800;
  color: var(--brand-1);
  background: var(--brand-light);
  padding: 0.18rem 0.6rem;
  border-radius: var(--r-full);
  display: inline-block;
}

.card-title { font-size: 1.05rem; font-weight: 900; letter-spacing: -0.01em; color: var(--txt-main); }
.card-desc { font-size: 0.84rem; color: var(--txt-sub); line-height: 1.55; font-weight: 600; }

/* ─── Modal ──────────────────────────────────── */
/*
  모달 구조 설계 원칙:
  - .modal-bg  : 고정 오버레이 (position:fixed, inset:0)
  - .modal-box : 최대 높이 제한 flex 컨테이너, overflow hidden
  - .modal-hdr : flex-shrink:0 으로 항상 상단 고정
  - .modal-content : flex:1 + overflow-y:auto 로 독립 스크롤
  => 콘텐츠가 아무리 길어도 헤더/닫기 버튼은 항상 뷰포트 내 고정
*/
.modal-bg {
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.6);
  backdrop-filter: blur(6px);
  -webkit-backdrop-filter: blur(6px);
  z-index: 200;
  /*
    [PC 키보드 입력 버그 해결]
    overflow:hidden을 제거함. position:fixed+inset:0은 이미 뷰포트를 꽉 채워 추가 설정 불필요.
    overflow:hidden이 있으면 PC Chrome에서 GPU 콤포지터 레이어 충돌로
    내부 input의 포니터 이벤트 hit-test가 재비지에 머물러
    키보드 입력이 전달되지 않는 문제가 발생함.
    모바일은 touch 이벤트가 별도 경로로 처리되어 우회됨.
  */
  display: flex;
  align-items: center;
  justify-content: center;
  padding: max(1rem, env(safe-area-inset-top)) max(1rem, env(safe-area-inset-right)) max(1rem, env(safe-area-inset-bottom)) max(1rem, env(safe-area-inset-left));
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.22s ease;
}
.modal-bg.open { opacity: 1; pointer-events: auto; }

.modal-box {
  width: 100%;
  max-width: 720px;
  /* dvh: 모바일 브라우저 주소창 포함한 실제 뷰포트 높이 */
  max-height: min(90dvh, 90vh);
  background: var(--bg-card);
  border: 2px solid var(--border);
  border-radius: var(--r-xl);
  box-shadow: var(--shadow-modal);
  /* 핵심: flex 컬럼 구조로 헤더와 콘텐츠 분리 */
  display: flex;
  flex-direction: column;
  /* overflow hidden으로 border-radius 유지, 스크롤은 자식이 담당 */
  overflow: hidden;
  transform: translateY(24px) scale(0.97);
  transition: transform 0.25s cubic-bezier(.34,1.56,.64,1);
  /* 모달 박스 자체는 shrink되지 않도록 */
  flex-shrink: 0;
}
.modal-bg.open .modal-box { transform: translateY(0) scale(1); }

/* 헤더: flex-shrink:0 으로 절대 찌그러지지 않음 */
.modal-hdr {
  flex-shrink: 0;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1rem 1.25rem;
  border-bottom: 2px solid var(--border);
  background: var(--bg-section);
  /* z-index 보장 */
  position: relative;
  z-index: 1;
}
.modal-hdr-left {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  min-width: 0; /* 타이틀 말줄임 허용 */
}
.modal-icon {
  width: 2.2rem; height: 2.2rem;
  flex-shrink: 0;
  border-radius: var(--r-md);
  background: var(--brand-light);
  border: 1.5px solid rgba(109,40,217,0.2);
  display: flex; align-items: center; justify-content: center;
  font-size: 1.1rem; font-weight: 700; color: var(--brand-1);
}
.modal-title {
  font-size: 1.05rem;
  font-weight: 900;
  color: var(--txt-main);
  /* 긴 제목 말줄임 */
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

/* 닫기 버튼: 항상 헤더에 붙어있어 뷰포트 밖으로 나갈 수 없음 */
.modal-close {
  flex-shrink: 0;
  width: 2.1rem; height: 2.1rem;
  border-radius: var(--r-full);
  background: var(--bg-card);
  border: 1.5px solid var(--border);
  color: var(--txt-sub);
  font-size: 1.15rem;
  display: flex; align-items: center; justify-content: center;
  transition: var(--transition);
  margin-left: 0.75rem;
}
.modal-close:hover { background: var(--danger); border-color: var(--danger); color: #fff; }

/* 콘텐츠 영역: flex:1로 남은 공간 채우고, overflow-y:auto로 독립 스크롤 */
.modal-content {
  flex: 1;
  min-height: 0; /* flex item 스크롤의 핵심: min-height:0 없으면 scroll 안됨 */
  overflow-y: auto;
  /*
    [PC 키보드 입력 버그 해결]
    overflow-x:hidden 제거. 중첩된 overflow 컨테이너가 PC 브라우저에서
    GPU 레이어 충돌을 일으켜 키보드 입력 전달을 절단할 수 있음.
    가로 콘텐츠는 .modal-box의 overflow:hidden으로 이미 제어됨.
  */
  padding: 1.5rem;
  /* iOS 탄성 스크롤 개선 */
  -webkit-overflow-scrolling: touch;
  overscroll-behavior: contain;
}

/* ─── Tool Form UI (고대비 / 사용자 친화) ───────── */
.tool-form { display: flex; flex-direction: column; gap: 1.4rem; }

/* 필드 그룹 */
.field-group { display: flex; flex-direction: column; gap: 0; }

.field-label {
  display: block;
  font-size: 0.9rem; font-weight: 800;
  color: var(--txt-body);
  margin-bottom: 0.5rem;
  letter-spacing: 0.01em;
}

.field-label .hint {
  font-weight: 600; font-size: 0.8rem;
  color: var(--txt-sub); margin-left: 0.35rem;
}

/* 입력창 - 흰 배경 + 진한 회색 테두리 */
.field-input {
  width: 100%;
  padding: 0.8rem 1rem;
  border-radius: var(--r-md);
  border: 2px solid var(--input-border);
  background: var(--input-bg);
  color: var(--txt-main);
  font-size: 1rem;
  font-weight: 700;
  transition: var(--transition);
  line-height: 1.4;
  -webkit-text-fill-color: var(--txt-main);
}

.field-input:focus {
  border-color: var(--input-border-focus);
  box-shadow: var(--input-shadow-focus);
  outline: none;
}

.field-input::placeholder {
  color: var(--txt-faint);
  -webkit-text-fill-color: var(--txt-faint);
  font-weight: 600;
  font-size: 0.9rem;
}

/* ─── 입력 상태 구분 (기본 예시값 vs 사용자 직접 입력값) ─── */
/* 1. 기본 예시값 / 초기값 상태 */
.field-input.is-default-val {
  color: var(--txt-sub) !important;
  -webkit-text-fill-color: var(--txt-sub) !important;
  font-weight: 600 !important;
  border-color: var(--input-border) !important;
  background-color: var(--input-bg) !important;
}
.field-input.is-default-val:focus {
  border-color: var(--input-border-focus) !important;
  box-shadow: var(--input-shadow-focus) !important;
}

/* 2. 사용자가 직접 입력/수정한 상태 */
.field-input.is-user-val {
  color: var(--txt-main) !important;
  -webkit-text-fill-color: var(--txt-main) !important;
  font-weight: 800 !important;
  border-color: var(--brand-1) !important;
  background-color: var(--bg-card) !important;
  box-shadow: 0 0 0 1px var(--brand-1), var(--shadow-xs) !important;
}
.field-input.is-user-val:focus {
  border-color: var(--input-border-focus) !important;
  box-shadow: var(--input-shadow-focus) !important;
}

/* 입력창 중앙 강조 (금액 등) */
.field-input.big {
  font-size: 1.25rem;
  font-weight: 900;
  text-align: center;
  padding: 1rem;
}

/* 셀렉트 박스 */
.field-select {
  width: 100%;
  padding: 0.8rem 2.5rem 0.8rem 1rem;
  border-radius: var(--r-md);
  border: 2px solid var(--input-border);
  background: var(--input-bg);
  color: var(--txt-main);
  font-size: 0.95rem;
  font-weight: 700;
  appearance: none;
  -webkit-appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 24 24' fill='none' stroke='%236b7280' stroke-width='2.5'%3E%3Cpath d='m6 9 6 6 6-6'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 0.9rem center;
  cursor: pointer;
  transition: var(--transition);
}
.field-select:focus {
  border-color: var(--input-border-focus);
  box-shadow: var(--input-shadow-focus);
  outline: none;
}

/* 텍스트에어리어 */
.field-textarea {
  width: 100%; min-height: 130px;
  padding: 0.9rem 1rem;
  border-radius: var(--r-md);
  border: 2px solid var(--input-border);
  background: var(--input-bg);
  color: var(--txt-main);
  font-size: 0.95rem; font-weight: 600;
  resize: vertical; line-height: 1.65;
  transition: var(--transition);
}
.field-textarea:focus {
  border-color: var(--input-border-focus);
  box-shadow: var(--input-shadow-focus);
  outline: none;
}
.field-textarea::placeholder { color: var(--txt-faint); font-size: 0.88rem; }

/* 레인지 슬라이더 */
.field-range {
  width: 100%;
  height: 6px;
  -webkit-appearance: none;
  appearance: none;
  background: linear-gradient(to right, var(--brand-1) 0%, var(--brand-1) var(--value-pct, 50%), var(--border) var(--value-pct, 50%));
  border-radius: var(--r-full);
  cursor: pointer;
}
.field-range::-webkit-slider-thumb {
  -webkit-appearance: none;
  width: 22px; height: 22px;
  border-radius: 50%;
  background: var(--brand-1);
  border: 3px solid #fff;
  box-shadow: 0 2px 8px rgba(109,40,217,0.3);
  cursor: pointer;
}

/* 인라인 입력 그룹 */
.row-group {
  display: flex; gap: 0.75rem; align-items: flex-end;
}
.row-group .field-group { flex: 1; }

/* 2열 그리드 */
.grid-2 { display: grid; grid-template-columns: 1fr 1fr; gap: 0.75rem; }
.grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 0.75rem; }

/* 버튼 */
.btn-main {
  padding: 0.9rem 1.5rem;
  border-radius: var(--r-lg);
  background: var(--brand-grd);
  color: #fff;
  font-weight: 800; font-size: 1rem;
  display: inline-flex; align-items: center; justify-content: center; gap: 0.5rem;
  transition: var(--transition);
  width: 100%;
  box-shadow: 0 4px 16px rgba(109,40,217,0.2);
  letter-spacing: 0.01em;
}
.btn-main:hover { opacity: 0.88; transform: translateY(-1px); box-shadow: 0 6px 24px rgba(109,40,217,0.3); }
.btn-main:active { transform: translateY(0); }

.btn-ghost {
  padding: 0.8rem 1.25rem;
  border-radius: var(--r-lg);
  background: var(--bg-section);
  border: 2px solid var(--border);
  color: var(--txt-body);
  font-weight: 800; font-size: 0.9rem;
  display: inline-flex; align-items: center; justify-content: center; gap: 0.4rem;
  transition: var(--transition);
}
.btn-ghost:hover { border-color: var(--brand-1); color: var(--brand-1); background: var(--brand-light); }

.btn-sm {
  padding: 0.4rem 0.85rem;
  font-size: 0.82rem; font-weight: 800;
}

/* ─── 결과 영역 ─────────────────────────────────── */
.result-panel {
  background: var(--result-bg);
  border: 2px solid var(--result-border);
  border-radius: var(--r-lg);
  padding: 1.25rem 1.35rem;
}

.result-panel-hdr {
  display: flex; align-items: center; justify-content: space-between;
  margin-bottom: 0.85rem;
  font-size: 0.8rem; font-weight: 800;
  color: var(--brand-2);
  text-transform: uppercase; letter-spacing: 0.06em;
}

.result-big {
  font-size: 2rem; font-weight: 900;
  color: var(--brand-1); letter-spacing: -0.03em;
  margin: 0.3rem 0;
}

.result-note {
  font-size: 0.85rem; color: var(--txt-sub); font-weight: 600; margin-top: 0.35rem;
}

/* 통계 그리드 박스 */
.stat-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(100px, 1fr));
  gap: 0.65rem;
}

.stat-box {
  background: var(--bg-card);
  border: 2px solid var(--border);
  border-radius: var(--r-md);
  padding: 0.85rem 0.65rem;
  text-align: center;
}
.stat-label { font-size: 0.72rem; color: var(--txt-sub); font-weight: 700; }
.stat-val { font-size: 1.4rem; font-weight: 900; color: var(--brand-1); margin-top: 0.2rem; line-height: 1; }

/* 구분선 */
.divider {
  border: none;
  border-top: 1.5px solid var(--border);
  margin: 0.25rem 0;
}

/* 인라인 결과값 표시 */
.inline-result {
  display: flex; align-items: center; justify-content: space-between;
  padding: 0.75rem 1rem;
  background: var(--bg-section);
  border: 2px solid var(--border);
  border-radius: var(--r-md);
  gap: 1rem;
}
.inline-result .label { font-size: 0.85rem; font-weight: 700; color: var(--txt-sub); }
.inline-result .value { font-size: 1.2rem; font-weight: 900; color: var(--brand-1); text-align: right; }

/* ─── Page Panels (소개 / 약관) ─────────────────── */
.page-panel {
  background: var(--bg-card);
  border: 2px solid var(--border);
  border-radius: var(--r-xl);
  padding: 2.5rem;
  margin-bottom: 4rem;
  box-shadow: var(--shadow-card);
}
.page-panel h1 { font-size: 1.75rem; font-weight: 900; margin-bottom: 0.5rem; }
.page-panel .page-date { font-size: 0.82rem; color: var(--txt-sub); font-weight: 600; margin-bottom: 2rem; }
.page-panel h2 {
  font-size: 1.1rem; font-weight: 800;
  margin: 2rem 0 0.7rem;
  color: var(--brand-1);
  padding-bottom: 0.4rem;
  border-bottom: 1.5px solid var(--border);
}
.page-panel p, .page-panel li {
  font-size: 0.93rem; line-height: 1.8; color: var(--txt-body); font-weight: 600;
}
.page-panel ul { padding-left: 1.5rem; margin-top: 0.5rem; }
.page-panel li { margin-bottom: 0.4rem; }
.page-panel .highlight-box {
  background: rgba(5,150,105,0.07);
  border-left: 4px solid var(--brand-2);
  border-radius: 0 var(--r-md) var(--r-md) 0;
  padding: 1rem 1.25rem;
  margin: 1.25rem 0;
  font-size: 0.9rem; color: var(--txt-main); font-weight: 700;
}

/* ─── Footer ─────────────────────────────────── */
.site-footer {
  background: var(--bg-card);
  border-top: 2px solid var(--border);
  padding: 2.75rem 0 1.5rem;
  margin-top: auto;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.4fr repeat(3, 1fr);
  gap: 2.5rem; margin-bottom: 2.25rem;
}

.footer-brand-name {
  font-size: 1.2rem; font-weight: 900; letter-spacing: -0.03em; margin-bottom: 0.65rem;
}
.footer-brand-name em { color: var(--brand-1); font-style: normal; }

.footer-desc { font-size: 0.85rem; color: var(--txt-sub); line-height: 1.7; font-weight: 600; }

.footer-col-title {
  font-size: 0.75rem; font-weight: 800;
  text-transform: uppercase; letter-spacing: 0.08em;
  color: var(--txt-faint); margin-bottom: 0.9rem;
}

.footer-links-list { list-style: none; display: flex; flex-direction: column; gap: 0.5rem; }
.footer-links-list a { font-size: 0.875rem; color: var(--txt-sub); font-weight: 600; transition: var(--transition); }
.footer-links-list a:hover { color: var(--brand-1); }

.footer-bottom {
  border-top: 1px solid var(--border);
  padding-top: 1.4rem;
  display: flex; align-items: center; justify-content: space-between;
  font-size: 0.82rem; color: var(--txt-faint); font-weight: 600;
}

/* Empty State */
.empty-state { grid-column: 1 / -1; text-align: center; padding: 4rem 1rem; color: var(--txt-sub); }
.empty-state .es-icon { font-size: 3rem; margin-bottom: 0.75rem; }
.empty-state .es-title { font-size: 1.05rem; font-weight: 800; margin-bottom: 0.35rem; color: var(--txt-main); }
.empty-state .es-sub { font-size: 0.88rem; }

/* ─── PDF Workspace UI ───────────────────────── */
.pdf-workspace {
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
  width: 100%;
}

.pdf-dropzone {
  border: 3px dashed var(--border-strong);
  border-radius: var(--r-lg);
  padding: 2.5rem 1.5rem;
  text-align: center;
  background: var(--bg-section);
  cursor: pointer;
  transition: var(--transition);
}
.pdf-dropzone:hover {
  border-color: var(--brand-1);
  background: var(--brand-light);
}
.pdf-dropzone-icon {
  font-size: 2.5rem;
  margin-bottom: 0.75rem;
}
.pdf-dropzone-text {
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--txt-body);
}
.pdf-dropzone-sub {
  font-size: 0.8rem;
  color: var(--txt-sub);
  margin-top: 0.25rem;
}

.pdf-grid-container {
  max-height: 480px;
  overflow-y: auto;
  padding: 0.5rem;
  border: 2px solid var(--border);
  border-radius: var(--r-lg);
  background: var(--bg-section);
}

.pdf-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(130px, 1fr));
  gap: 1rem;
}

.pdf-page-card {
  position: relative;
  background: var(--bg-card);
  border: 2px solid var(--border);
  border-radius: var(--r-md);
  padding: 0.5rem;
  display: flex;
  flex-direction: column;
  align-items: center;
  box-shadow: var(--shadow-xs);
  transition: var(--transition);
  user-select: none;
}
.pdf-page-card:hover {
  border-color: var(--brand-1);
  box-shadow: var(--shadow-card);
}

.pdf-thumb-wrapper {
  width: 100%;
  aspect-ratio: 1 / 1.41;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
  background: #f8fafc;
  border-radius: var(--r-sm);
  position: relative;
}

.pdf-thumb-wrapper canvas {
  max-width: 100%;
  max-height: 100%;
  object-fit: contain;
  transition: transform 0.2s ease;
}

.pdf-page-num {
  font-size: 0.75rem;
  font-weight: 900;
  color: var(--txt-main);
  margin-top: 0.5rem;
  background: var(--bg-page);
  padding: 0.15rem 0.5rem;
  border-radius: var(--r-full);
  border: 1px solid var(--border);
}

/* Thumbnail Hover Actions Overlay */
.pdf-actions-overlay {
  position: absolute;
  inset: 0;
  background: rgba(15, 23, 42, 0.75);
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.35rem;
  opacity: 0;
  pointer-events: none;
  transition: var(--transition);
  border-radius: var(--r-md);
  z-index: 10;
}
.pdf-page-card:hover .pdf-actions-overlay {
  opacity: 1;
  pointer-events: auto;
}

.pdf-action-btn {
  width: 1.85rem;
  height: 1.85rem;
  border-radius: var(--r-sm);
  background: #ffffff;
  color: #000000;
  font-size: 0.85rem;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: var(--transition);
  box-shadow: var(--shadow-xs);
}
.pdf-action-btn:hover {
  background: var(--brand-1);
  color: #ffffff;
}
.pdf-action-btn.btn-del:hover {
  background: var(--danger);
  color: #ffffff;
}

.pdf-loading-spinner {
  display: inline-block;
  width: 1.5rem;
  height: 1.5rem;
  border: 3px solid rgba(109, 40, 217, 0.2);
  border-radius: 50%;
  border-top-color: var(--brand-1);
  animation: spin 0.8s linear infinite;
  margin-right: 0.5rem;
}

@keyframes spin {
  to { transform: rotate(360deg); }
}

/* ─── 반응형 ─────────────────────────────────── */
@media (max-width: 900px) {
  .footer-grid { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 640px) {
  .header-search { display: none; }
  .hero-title { font-size: 1.8rem; }
  .footer-grid { grid-template-columns: 1fr; }
  .tools-grid { grid-template-columns: 1fr; }
  .footer-bottom { flex-direction: column; gap: 0.6rem; text-align: center; }
  .grid-2, .grid-3 { grid-template-columns: 1fr; }
  .row-group { flex-direction: column; }
  .page-panel { padding: 1.4rem; }
  .pdf-grid { grid-template-columns: repeat(auto-fill, minmax(100px, 1fr)); }

  /* 모바일 모달 최적화 */
  .modal-bg {
    /* 모바일에선 하단 sheet 스타일로 표시 */
    align-items: flex-end;
    padding: 0;
  }
  .modal-box {
    /* 화면 하단부터 올라오는 시트 */
    max-width: 100%;
    max-height: min(92dvh, 92vh);
    border-radius: var(--r-xl) var(--r-xl) 0 0;
    border-bottom: none;
    /* 아래에서 위로 올라오는 애니메이션 */
    transform: translateY(100%);
  }
  .modal-bg.open .modal-box {
    transform: translateY(0);
  }
  .modal-hdr {
    padding: 0.9rem 1rem;
  }
  .modal-title {
    font-size: 0.95rem;
  }
  .modal-content {
    padding: 1rem;
    /* 모바일 홈바 영역 피하기 */
    padding-bottom: max(1rem, env(safe-area-inset-bottom));
  }
}

/* 매우 작은 화면 (iPhone SE 등) */
@media (max-width: 380px) {
  .modal-box { max-height: min(95dvh, 95vh); }
  .modal-hdr { padding: 0.75rem 0.875rem; }
  .modal-content { padding: 0.875rem; }
}

/* ==========================================================================
   WebToolBox - New Home & Tool Detail Layouts
   ========================================================================== */

/* 홈페이지 고유 소개 섹션 */
.intro-seo-section {
  padding-bottom: 3.5rem;
}

.intro-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.5rem;
  margin-bottom: 2rem;
}

.intro-card {
  background: var(--bg-card);
  border: 2px solid var(--border);
  border-radius: var(--r-xl);
  padding: 1.5rem;
  box-shadow: var(--shadow-card);
  transition: var(--transition);
}
.intro-card:hover {
  border-color: var(--brand-1);
  box-shadow: var(--shadow-hover);
}

.intro-card h3 {
  font-size: 1.1rem;
  font-weight: 900;
  color: var(--txt-main);
  margin-bottom: 0.75rem;
}

.intro-card p {
  font-size: 0.88rem;
  color: var(--txt-body);
  line-height: 1.7;
  font-weight: 600;
}

/* 사용 가이드 박스 */
.guide-box {
  background: var(--bg-card);
  border: 2px solid var(--border);
  border-left: 5px solid var(--brand-1);
  border-radius: var(--r-lg);
  padding: 1.5rem;
  box-shadow: var(--shadow-card);
}

/* 자주 묻는 질문 (FAQ) */
.faq-container {
  width: 100%;
}

.faq-list {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.faq-item {
  background: var(--bg-card);
  border: 2px solid var(--border);
  border-radius: var(--r-lg);
  padding: 1.25rem;
  box-shadow: var(--shadow-card);
}

.faq-q {
  font-size: 0.95rem;
  font-weight: 900;
  color: var(--brand-1);
  margin-bottom: 0.5rem;
}

.faq-a {
  font-size: 0.88rem;
  font-weight: 600;
  color: var(--txt-body);
  line-height: 1.65;
}

/* 도구 상세 페이지 전용 스타일 */
.tool-page-container {
  padding: 1rem 0 4rem 0;
  animation: fadeIn 0.25s ease-out;
}

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(10px); }
  to { opacity: 1; transform: translateY(0); }
}

.info-text-card {
  background: var(--bg-card);
  border: 2px solid var(--border);
  border-left: 4px solid var(--brand-2);
  border-radius: var(--r-lg);
  padding: 1.25rem;
  box-shadow: var(--shadow-card);
}

.info-text-card h4 {
  font-size: 1rem;
  font-weight: 900;
  color: var(--txt-main);
  margin-bottom: 0.75rem;
}

.info-text-card p, .info-text-card li {
  font-size: 0.88rem;
  font-weight: 600;
  color: var(--txt-body);
  line-height: 1.7;
}

/* 도구 뷰 모바일 반응형 추가 대응 */
@media (max-width: 640px) {
  .intro-grid {
    grid-template-columns: 1fr;
    gap: 1rem;
  }
  .tool-page-container {
    padding: 0.5rem 0 3rem 0;
  }
  .tool-page-container h1 {
    font-size: 1.6rem !important;
  }
  .tool-page-container p {
    font-size: 0.9rem !important;
    margin-bottom: 1.25rem !important;
  }
  /* 2열 구조를 모바일에선 1열 세로 정렬로 변경 */
  .tool-information-section > div {
    grid-template-columns: 1fr !important;
    gap: 1rem !important;
  }
}

/* ─── 모바일 입력창 삐져나옴 방지 (공통) ───────── */
/*
  input[type="date"], input[type="time"] 및 기타 입력창이
  모바일에서 부모 컨테이너를 벗어나는 문제를 방지한다.
  핵심: max-width:100% + box-sizing:border-box 보장
*/
input[type="date"],
input[type="time"],
input[type="datetime-local"] {
  max-width: 100%;
  min-width: 0;
  box-sizing: border-box;
  -webkit-appearance: none;
  appearance: none;
}

/* .field-input에 min-width:0 추가 - flex/grid 자식으로 사용 시 shrink 허용 */
.field-input {
  min-width: 0;
  max-width: 100%;
  box-sizing: border-box;
  word-break: break-all;
  overflow-wrap: anywhere;
}

/* 긴 문자열(해시값, 비밀번호, URL 등) 결과가 모바일에서 삐져나오지 않도록 */
.field-input[readonly],
.field-input[type="text"][readonly],
input[readonly].field-input {
  word-break: break-all;
  overflow-wrap: anywhere;
  overflow: hidden;
  text-overflow: ellipsis;
}

/* 결과 패널 내부 긴 문자열 오버플로우 방지 */
.result-panel,
.result-panel *,
.inline-result .value {
  word-break: break-word;
  overflow-wrap: anywhere;
  max-width: 100%;
}

/* 모바일에서 flex 컨테이너 내 입력창 삐져나옴 방지 */
@media (max-width: 640px) {
  .row-group {
    flex-wrap: wrap;
  }
  .row-group .field-group {
    min-width: 0;
    flex: 1 1 100%;
  }

  /* 강력한 비밀번호 생성기 결과 등 긴 문자열 결과 영역 */
  .tool-form .result-panel pre,
  .tool-form .result-panel code,
  .tool-form pre,
  .tool-form code {
    white-space: pre-wrap;
    word-break: break-all;
    overflow-wrap: anywhere;
    max-width: 100%;
  }

  /* 스톱워치 타이머 폰트 크기 조절 - 화면 밖으로 나가지 않도록 */
  .stat-val {
    font-size: 1.1rem;
    word-break: break-all;
  }
}