/* =========================================================
   생활비 계산소 — 공통 디자인 시스템
   ========================================================= */

@font-face {
  font-family: 'Pretendard';
  font-weight: 45 920;
  font-display: swap;
  src: url('https://cdn.jsdelivr.net/gh/orioncactus/pretendard@v1.3.9/dist/web/variable/woff2/PretendardVariable.woff2') format('woff2-variations');
}

:root {
  /* --- Brand / Neutrals --- */
  --navy:        #1f2d52;   /* 메인 컬러 */
  --navy-deep:   #16203d;   /* 진한 텍스트/푸터 */
  --navy-soft:   #3a4a78;
  --ink:         #222a3d;   /* 본문 텍스트 */
  --ink-soft:    #5c6577;   /* 보조 텍스트 */
  --ink-faint:   #8b93a4;   /* 캡션 */

  /* --- Backgrounds --- */
  --bg:          #f3efe7;   /* 페이지(아이보리) */
  --bg-warm:     #faf7f0;   /* 히어로 영역 */
  --surface:     #ffffff;   /* 카드 */
  --surface-2:   #f7f8fa;   /* 입력칸/연한 패널 */
  --surface-3:   #eef1f5;   /* 광고/보조 패널 */

  /* --- Lines --- */
  --line:        #e9e6df;
  --line-2:      #eceef2;

  /* --- Accents (동일 채도/명도, 색상만 변경) --- */
  --blue:        #4c7df0;
  --blue-soft:   #eaf1fe;
  --green:       #1f9d6b;
  --green-soft:  #e6f5ee;
  --orange:      #e0892a;
  --orange-soft: #fcf1e2;
  --red:         #d9655b;
  --red-soft:    #fbecea;

  /* --- Chart palette (muted) --- */
  --c1: #2f4276;  --c2: #5b8def;  --c3: #4bb7c4;
  --c4: #38a06d;  --c5: #e0a13a;  --c6: #d97b6c;
  --c7: #a07fd1;  --c8: #8a93a8;  --c9: #c2b07a;

  /* --- Radius / Shadow --- */
  --r-sm: 8px;
  --r:    12px;
  --r-lg: 16px;
  --r-xl: 22px;
  --shadow-sm: 0 1px 2px rgba(22,32,61,.05);
  --shadow:    0 1px 3px rgba(22,32,61,.05), 0 10px 26px rgba(22,32,61,.05);
  --shadow-lg: 0 2px 6px rgba(22,32,61,.06), 0 22px 48px rgba(22,32,61,.09);

  --maxw: 1120px;
}

* { box-sizing: border-box; }

html { -webkit-text-size-adjust: 100%; }

body {
  margin: 0;
  font-family: 'Pretendard', -apple-system, BlinkMacSystemFont, 'Segoe UI', system-ui, sans-serif;
  background: var(--bg);
  color: var(--ink);
  line-height: 1.55;
  font-size: 15px;
  letter-spacing: -0.01em;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

h1, h2, h3, h4 { margin: 0; color: var(--navy-deep); line-height: 1.25; letter-spacing: -0.02em; }
p { margin: 0; }
a { color: inherit; text-decoration: none; }
button { font-family: inherit; cursor: pointer; }
ul { margin: 0; padding: 0; list-style: none; }

.num { font-variant-numeric: tabular-nums; font-feature-settings: "tnum" 1; }

.wrap { max-width: var(--maxw); margin: 0 auto; padding: 0 24px; }

/* =========================================================
   Header
   ========================================================= */
.site-header {
  position: sticky; top: 0; z-index: 50;
  background: rgba(250,247,240,.82);
  backdrop-filter: saturate(140%) blur(12px);
  border-bottom: 1px solid var(--line);
}
.site-header .wrap {
  height: 68px;
  display: flex; align-items: center; gap: 28px;
}
.brand { display: flex; align-items: center; gap: 10px; font-weight: 700; }
.brand .logo {
  width: 34px; height: 34px; border-radius: 9px;
  background: var(--navy); color: #fff;
  display: grid; place-items: center; flex: none;
}
.brand .logo svg { width: 19px; height: 19px; }
.brand .name { font-size: 18px; color: var(--navy-deep); letter-spacing: -0.03em; }

.nav { margin-left: auto; display: flex; align-items: center; gap: 4px; }
.nav a {
  padding: 8px 14px; border-radius: 8px;
  font-size: 14.5px; font-weight: 600; color: var(--ink-soft);
  white-space: nowrap;
  transition: background .15s, color .15s;
}
.nav a:hover { color: var(--navy-deep); background: rgba(31,45,82,.06); }
.nav a.active { color: var(--navy-deep); }
.icon-btn {
  width: 38px; height: 38px; border-radius: 9px;
  border: 1px solid var(--line); background: var(--surface);
  display: grid; place-items: center; color: var(--ink-soft);
  margin-left: 8px;
}
.icon-btn:hover { color: var(--navy-deep); border-color: #d9d4c9; }
.icon-btn svg { width: 17px; height: 17px; }

.hamburger { display: none; }

/* =========================================================
   Buttons
   ========================================================= */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  font-size: 14.5px; font-weight: 600; border: 1px solid transparent;
  border-radius: var(--r); padding: 12px 20px; transition: all .15s; white-space: nowrap;
}
.btn svg { width: 16px; height: 16px; }
.btn-primary { background: var(--navy); color: #fff; box-shadow: var(--shadow-sm); }
.btn-primary:hover { background: var(--navy-deep); transform: translateY(-1px); box-shadow: var(--shadow); }
.btn-ghost { background: var(--surface); color: var(--navy-deep); border-color: var(--line); }
.btn-ghost:hover { background: var(--surface-2); border-color: #d9d4c9; }
.btn-soft { background: var(--surface-2); color: var(--ink-soft); border-color: var(--line-2); }
.btn-soft:hover { color: var(--navy-deep); background: #eef0f3; }
.btn-block { width: 100%; }
.btn-lg { padding: 14px 26px; font-size: 15.5px; }

/* =========================================================
   Generic card
   ========================================================= */
.card {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--r-lg);
  box-shadow: var(--shadow-sm);
}

/* =========================================================
   Footer
   ========================================================= */
.site-footer { background: var(--navy-deep); color: #c7cee0; margin-top: 72px; }
.site-footer .wrap { padding-top: 46px; padding-bottom: 36px; }
.foot-top { display: flex; flex-wrap: wrap; gap: 32px; justify-content: space-between; align-items: flex-start; }
.foot-brand { max-width: 360px; }
.foot-brand .brand .name { color: #fff; }
.foot-brand p { color: #93a0bd; font-size: 13.5px; margin-top: 14px; line-height: 1.6; }
.foot-links { display: flex; gap: 30px; flex-wrap: wrap; }
.foot-links a { font-size: 14px; color: #b9c2da; font-weight: 500; }
.foot-links a:hover { color: #fff; }
.foot-bottom {
  margin-top: 34px; padding-top: 22px; border-top: 1px solid rgba(255,255,255,.1);
  display: flex; justify-content: space-between; align-items: center; flex-wrap: wrap; gap: 16px;
}
.foot-bottom .copy { font-size: 12.5px; color: #7e8aa8; }
.socials { display: flex; gap: 10px; }
.socials a {
  width: 34px; height: 34px; border-radius: 50%;
  background: rgba(255,255,255,.08); display: grid; place-items: center; color: #c7cee0;
}
.socials a:hover { background: var(--blue); color: #fff; }
.socials svg { width: 15px; height: 15px; }

/* =========================================================
   Responsive (shared)
   ========================================================= */
@media (max-width: 760px) {
  .nav { display: none; }
  .hamburger {
    display: grid; margin-left: auto;
    width: 40px; height: 40px; border-radius: 9px;
    border: 1px solid var(--line); background: var(--surface);
    place-items: center; color: var(--navy-deep);
  }
  .hamburger svg { width: 20px; height: 20px; }
  .site-header .wrap { gap: 12px; }
}