/* ============================================================
   로또랩 (LottoLab · 2203) — style.css
   Base: DesignKit Aurora + Gradient 변형 → "행운 페스티브" 테마
   Design ref: Figma(playful bold) + Stripe(gradient hero)
   공식 로또 6/45 볼 색상을 번호 칩 디자인 언어로 사용.
   ⚠️ 광고 래퍼(.ad-grid/.ad-row/.ad-cell)에 border-radius/overflow 금지
   ============================================================ */

:root {
  /* 브랜드 그라디언트: 골드 → 바이올렛 (행운·프리미엄) */
  --gold: #f5a623;
  --gold-deep: #e8890b;
  --violet: #7c3aed;
  --violet-deep: #5b21b6;
  --brand-grad: linear-gradient(120deg, #f5a623 0%, #f76d6d 42%, #7c3aed 100%);
  --brand-grad-soft: linear-gradient(120deg, #fff4e0 0%, #ffe9ec 50%, #f1e9ff 100%);

  --primary: #7c3aed;
  --primary-ink: #5b21b6;

  /* 뉴트럴 */
  --bg: #fbfaff;
  --bg-alt: #f4f2fb;
  --surface: #ffffff;
  --border: #e9e6f2;
  --border-strong: #d8d3ea;
  --ink: #1c1830;
  --ink-2: #4b4664;
  --ink-3: #837e9a;
  --ok: #16a34a;
  --danger: #dc2626;

  /* 공식 로또볼 색상 */
  --ball-y: #fbc400;   /* 1–10  노랑 */
  --ball-b: #69c8f2;   /* 11–20 파랑 */
  --ball-r: #ff7272;   /* 21–30 빨강 */
  --ball-k: #aaaaaa;   /* 31–40 회색 */
  --ball-g: #b0d840;   /* 41–45 초록 */

  --radius: 16px;
  --radius-sm: 10px;
  --shadow-sm: 0 1px 2px rgba(28, 24, 48, .06), 0 1px 3px rgba(28, 24, 48, .05);
  --shadow: 0 6px 24px rgba(91, 33, 182, .09), 0 2px 8px rgba(28, 24, 48, .05);
  --shadow-lg: 0 18px 50px rgba(91, 33, 182, .16);
  --maxw: 960px;

  --font: -apple-system, BlinkMacSystemFont, "Apple SD Gothic Neo", "Malgun Gothic",
    "Segoe UI", "Noto Sans KR", Roboto, sans-serif;
  --mono: "SF Mono", ui-monospace, "JetBrains Mono", "D2Coding", Menlo, Consolas, monospace;
}

* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: var(--font);
  color: var(--ink);
  background: var(--bg);
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
}
a { color: var(--primary-ink); text-decoration: none; }
a:hover { text-decoration: underline; }
h1, h2, h3 { line-height: 1.25; letter-spacing: -.02em; margin: 0 0 .5em; }
img { max-width: 100%; }

/* ─── 헤더 ─── */
.site-header {
  position: sticky; top: 0; z-index: 50;
  background: rgba(255, 255, 255, .82);
  backdrop-filter: saturate(150%) blur(12px);
  border-bottom: 1px solid var(--border);
}
.site-header__inner {
  max-width: var(--maxw); margin: 0 auto; padding: 12px 20px;
  display: flex; align-items: center; justify-content: space-between; gap: 16px;
}
.logo { display: inline-flex; align-items: center; gap: 10px; font-weight: 800; }
.logo:hover { text-decoration: none; }
.logo__mark {
  width: 34px; height: 34px; border-radius: 11px; flex: 0 0 auto;
  display: grid; place-items: center; color: #fff; font-size: 18px;
  background: var(--brand-grad);
  box-shadow: 0 4px 12px rgba(124, 58, 237, .35);
}
.logo__text { display: flex; flex-direction: column; line-height: 1.05; }
.logo__main { font-size: 18px; color: var(--ink); }
.logo__main .accent {
  background: var(--brand-grad); -webkit-background-clip: text;
  background-clip: text; color: transparent;
}
.logo__sub { font-size: 10px; letter-spacing: .18em; color: var(--ink-3); font-weight: 700; }

.nav { display: flex; align-items: center; gap: 4px; flex-wrap: wrap; }
.nav a {
  padding: 7px 12px; border-radius: 999px; color: var(--ink-2);
  font-size: 14px; font-weight: 600;
}
.nav a:hover { background: var(--bg-alt); text-decoration: none; color: var(--ink); }
.nav a.is-active { background: var(--primary); color: #fff; }
.nav__toggle { display: none; }

/* ─── 히어로 ─── */
.hero {
  background: var(--brand-grad-soft);
  border-bottom: 1px solid var(--border);
}
.hero__inner {
  max-width: var(--maxw); margin: 0 auto; padding: 40px 20px 32px; text-align: center;
}
.hero h1 { font-size: clamp(26px, 5vw, 40px); font-weight: 900; }
.hero h1 .grad {
  background: var(--brand-grad); -webkit-background-clip: text;
  background-clip: text; color: transparent;
}
.hero p { color: var(--ink-2); font-size: clamp(14px, 2.4vw, 17px); margin: 0 auto; max-width: 620px; }
.hero__balls { display: flex; justify-content: center; gap: 8px; margin: 18px 0 4px; }

/* ─── 레이아웃 ─── */
.wrap { max-width: var(--maxw); margin: 0 auto; padding: 28px 20px 56px; }
.wrap--narrow { max-width: 760px; }
.section { margin: 0 0 28px; }
.crumbs { font-size: 13px; color: var(--ink-3); margin: 0 0 14px; }
.crumbs a { color: var(--ink-3); }

/* ─── 카드 ─── */
.card {
  background: var(--surface); border: 1px solid var(--border);
  border-radius: var(--radius); box-shadow: var(--shadow); padding: 22px;
}
.card + .card { margin-top: 20px; }
.card__title { font-size: 17px; font-weight: 800; display: flex; align-items: center; gap: 8px; }
.card__hint { font-size: 13px; color: var(--ink-3); margin: 2px 0 16px; }

/* ─── 탭 / subnav ─── */
.subnav {
  display: inline-flex; gap: 4px; padding: 4px; margin: 0 0 18px;
  background: var(--bg-alt); border-radius: 999px; flex-wrap: wrap;
}
.subnav button {
  border: 0; background: transparent; color: var(--ink-2); cursor: pointer;
  padding: 8px 16px; border-radius: 999px; font-weight: 700; font-size: 14px;
  font-family: inherit; transition: .15s;
}
.subnav button.is-active { background: #fff; color: var(--primary-ink); box-shadow: var(--shadow-sm); }

/* ─── 폼 ─── */
.field { margin: 0 0 16px; }
.field label { display: block; font-weight: 700; font-size: 14px; margin: 0 0 7px; }
.field .sub { font-weight: 500; color: var(--ink-3); font-size: 12px; }
.input-wrap { position: relative; display: flex; align-items: center; }
.input {
  width: 100%; padding: 12px 14px; font-size: 16px; font-family: inherit;
  border: 1.5px solid var(--border-strong); border-radius: var(--radius-sm);
  background: #fff; color: var(--ink); transition: .15s;
}
.input:focus { outline: 0; border-color: var(--primary); box-shadow: 0 0 0 4px rgba(124, 58, 237, .12); }
.input.has-suffix { padding-right: 46px; }
.input-suffix { position: absolute; right: 14px; color: var(--ink-3); font-size: 14px; pointer-events: none; }
.row { display: flex; gap: 12px; flex-wrap: wrap; }
.row > * { flex: 1 1 160px; }

.range-row { display: flex; align-items: center; gap: 12px; }
.range-row input[type="range"] { flex: 1; accent-color: var(--violet); }
.range-val {
  font-family: var(--mono); font-weight: 800; font-size: 18px; min-width: 28px;
  text-align: center; color: var(--primary-ink);
}

.chips-input { display: flex; flex-wrap: wrap; gap: 6px; }
.chip-toggle {
  width: 38px; height: 38px; border-radius: 50%; border: 1.5px solid var(--border-strong);
  background: #fff; color: var(--ink-2); font-weight: 700; font-family: var(--mono);
  font-size: 13px; cursor: pointer; transition: .12s;
}
.chip-toggle:hover { border-color: var(--violet); }
.chip-toggle.is-on { background: var(--primary); border-color: var(--primary); color: #fff; }
.chip-toggle.is-fixed { background: var(--gold); border-color: var(--gold-deep); color: #3a2a00; }

.opt-row { display: flex; flex-wrap: wrap; gap: 10px; }
.opt-pill {
  display: inline-flex; align-items: center; gap: 7px; padding: 8px 14px;
  border: 1.5px solid var(--border-strong); border-radius: 999px; cursor: pointer;
  font-size: 13px; font-weight: 600; color: var(--ink-2); background: #fff; user-select: none;
}
.opt-pill input { accent-color: var(--violet); }
.opt-pill:has(input:checked) { border-color: var(--violet); color: var(--primary-ink); background: #f6f1ff; }

/* ─── 버튼 ─── */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  border: 0; border-radius: var(--radius-sm); cursor: pointer;
  font-family: inherit; font-weight: 800; font-size: 15px; padding: 13px 22px;
  transition: transform .08s, box-shadow .15s, background .15s; color: #fff;
  background: var(--brand-grad); box-shadow: 0 6px 18px rgba(124, 58, 237, .3);
}
.btn:hover { text-decoration: none; transform: translateY(-1px); box-shadow: 0 10px 24px rgba(124, 58, 237, .38); }
.btn:active { transform: translateY(0); }
.btn--block { width: 100%; }
.btn--lg { padding: 15px 26px; font-size: 16px; }
.btn--ghost {
  background: #fff; color: var(--primary-ink); border: 1.5px solid var(--border-strong);
  box-shadow: none; font-weight: 700;
}
.btn--ghost:hover { border-color: var(--violet); background: #faf7ff; }
.btn--sm { padding: 8px 14px; font-size: 13px; }
.btn:disabled { opacity: .5; cursor: not-allowed; transform: none; }

/* ─── 로또 볼 ─── */
.balls { display: flex; flex-wrap: wrap; gap: 9px; align-items: center; }
.ball {
  width: 42px; height: 42px; border-radius: 50%; flex: 0 0 auto;
  display: grid; place-items: center; font-family: var(--mono);
  font-weight: 800; font-size: 17px; color: #2a2a2a;
  box-shadow: inset 0 -4px 8px rgba(0, 0, 0, .14), inset 0 3px 6px rgba(255, 255, 255, .55),
    0 2px 5px rgba(0, 0, 0, .16);
}
.ball--sm { width: 30px; height: 30px; font-size: 13px; }
.ball--lg { width: 52px; height: 52px; font-size: 20px; }
.ball--y { background: radial-gradient(circle at 34% 30%, #fff3b0, var(--ball-y)); }
.ball--b { background: radial-gradient(circle at 34% 30%, #cdefff, var(--ball-b)); }
.ball--r { background: radial-gradient(circle at 34% 30%, #ffd0d0, var(--ball-r)); color: #4a0000; }
.ball--k { background: radial-gradient(circle at 34% 30%, #e4e4e4, var(--ball-k)); }
.ball--g { background: radial-gradient(circle at 34% 30%, #e2f4a8, var(--ball-g)); color: #2a3a00; }
.ball--plus { background: none; box-shadow: none; color: var(--ink-3); font-size: 20px; font-weight: 400; width: 20px; }

.gameline {
  display: flex; align-items: center; gap: 10px; flex-wrap: wrap;
  padding: 12px 14px; border: 1px solid var(--border); border-radius: var(--radius-sm);
  background: var(--bg-alt); margin: 0 0 10px;
}
.gameline__tag {
  font-size: 12px; font-weight: 800; color: var(--primary-ink);
  background: #efe7ff; border-radius: 999px; padding: 3px 10px; flex: 0 0 auto;
}
.gameline__actions { margin-left: auto; display: flex; gap: 6px; }
.icon-btn {
  border: 1px solid var(--border-strong); background: #fff; border-radius: 8px;
  width: 32px; height: 32px; cursor: pointer; color: var(--ink-2); font-size: 14px;
}
.icon-btn:hover { border-color: var(--violet); color: var(--primary-ink); }

/* ─── 결과 박스 ─── */
.result {
  border: 1.5px solid var(--violet); border-radius: var(--radius);
  background: linear-gradient(180deg, #faf7ff, #fff);
  padding: 20px; text-align: center; margin-top: 6px;
}
.result__label { font-size: 13px; color: var(--ink-3); font-weight: 700; }
.result__main { font-size: clamp(28px, 7vw, 40px); font-weight: 900; font-family: var(--mono); color: var(--primary-ink); }
.result__main .unit { font-size: .5em; color: var(--ink-2); margin-left: 4px; font-family: var(--font); }
.result__sub { color: var(--ink-2); font-size: 14px; }

/* ─── 표 ─── */
.tbl-wrap { overflow-x: auto; -webkit-overflow-scrolling: touch; }
table.data { width: 100%; border-collapse: collapse; font-size: 14px; }
table.data th, table.data td { padding: 10px 12px; text-align: left; border-bottom: 1px solid var(--border); }
table.data th { background: var(--bg-alt); font-weight: 700; color: var(--ink-2); white-space: nowrap; }
table.data td.num, table.data th.num { text-align: right; font-family: var(--mono); }
table.data tr:hover td { background: #faf9ff; }

/* ─── 저장함 ─── */
.saved-empty { color: var(--ink-3); font-size: 14px; text-align: center; padding: 24px 0; }

/* ─── 그리드 카드 (허브) ─── */
.tiles { display: grid; grid-template-columns: repeat(auto-fill, minmax(220px, 1fr)); gap: 16px; }
.tile {
  display: block; background: var(--surface); border: 1px solid var(--border);
  border-radius: var(--radius); padding: 20px; box-shadow: var(--shadow-sm); transition: .15s;
}
.tile:hover { text-decoration: none; transform: translateY(-3px); box-shadow: var(--shadow); border-color: var(--border-strong); }
.tile__emoji { font-size: 26px; }
.tile__title { font-weight: 800; color: var(--ink); margin: 8px 0 4px; }
.tile__desc { font-size: 13px; color: var(--ink-3); }

/* ─── 콘텐츠(가이드/about) ─── */
.prose { max-width: 720px; }
.prose h2 { font-size: 22px; margin-top: 34px; }
.prose h3 { font-size: 17px; margin-top: 24px; }
.prose p, .prose li { color: var(--ink-2); }
.prose ul, .prose ol { padding-left: 22px; }
.prose blockquote {
  margin: 16px 0; padding: 10px 16px; border-left: 3px solid var(--gold);
  background: #fff8ea; color: var(--ink-2); border-radius: 0 8px 8px 0;
}
.faq details { border-bottom: 1px solid var(--border); padding: 14px 2px; }
.faq summary { font-weight: 700; cursor: pointer; list-style: none; }
.faq summary::-webkit-details-marker { display: none; }
.faq summary::before { content: "＋"; color: var(--violet); font-weight: 800; margin-right: 8px; }
.faq details[open] summary::before { content: "－"; }
.faq details p { color: var(--ink-2); margin: 10px 0 0; }

.notice {
  font-size: 13px; color: var(--ink-2); background: #fff8ea;
  border: 1px solid #f3e3bf; border-radius: var(--radius-sm); padding: 12px 14px; margin: 16px 0;
}
.notice strong { color: var(--gold-deep); }

/* ─── 광고 (룰 §4-2 · §12-3) ─── */
.ad-section { margin: 26px 0; }
.ad-grid {
  display: flex; flex-direction: column; align-items: center; gap: 14px;
  width: 100%; max-width: 672px; margin-left: auto; margin-right: auto;
}
.ad-grid[data-ad-layout="mixed"] { max-width: 760px; }
.ad-row { display: flex; flex-wrap: wrap; justify-content: center; gap: 12px; width: 100%; }
.ad-cell { min-height: 50px; }

/* ─── 푸터 ─── */
.site-footer { border-top: 1px solid var(--border); background: var(--surface); }
.site-footer__inner { max-width: var(--maxw); margin: 0 auto; padding: 34px 20px 40px; }
.foot-cols { display: grid; grid-template-columns: repeat(auto-fit, minmax(150px, 1fr)); gap: 22px; margin-bottom: 24px; }
.foot-col h4 { font-size: 13px; color: var(--ink-3); text-transform: uppercase; letter-spacing: .08em; margin: 0 0 10px; }
.foot-col a { display: block; color: var(--ink-2); font-size: 14px; padding: 3px 0; }
.foot-col a:hover { color: var(--primary-ink); }
.foot-bottom { border-top: 1px solid var(--border); padding-top: 18px; font-size: 12px; color: var(--ink-3); }
.foot-bottom .brand { font-weight: 800; color: var(--ink-2); }
.disclaimer { margin-top: 8px; line-height: 1.6; }

/* ─── 토스트 ─── */
.toast {
  position: fixed; left: 50%; bottom: 26px; transform: translateX(-50%) translateY(20px);
  background: var(--ink); color: #fff; padding: 11px 20px; border-radius: 999px;
  font-size: 14px; font-weight: 600; opacity: 0; pointer-events: none; transition: .25s; z-index: 100;
  box-shadow: var(--shadow-lg);
}
.toast.show { opacity: 1; transform: translateX(-50%) translateY(0); }

/* ─── 반응형 ─── */
@media (max-width: 720px) {
  .nav {
    position: absolute; top: 100%; left: 0; right: 0; flex-direction: column; align-items: stretch;
    background: #fff; border-bottom: 1px solid var(--border); padding: 8px; gap: 2px;
    display: none; box-shadow: var(--shadow);
  }
  .nav.open { display: flex; }
  .nav a { padding: 11px 14px; border-radius: 10px; }
  .nav__toggle {
    display: inline-grid; place-items: center; width: 40px; height: 40px;
    border: 1px solid var(--border-strong); border-radius: 10px; background: #fff;
    cursor: pointer; font-size: 18px; color: var(--ink-2);
  }
  .site-header__inner { position: relative; }
  .ball { width: 38px; height: 38px; font-size: 15px; }
}

@media (prefers-reduced-motion: reduce) {
  * { scroll-behavior: auto !important; transition: none !important; }
}