/* DRONESIM(dronesim.kr) 디자인 참고: 숲색 히어로, 연두 카드, 크림 알약 버튼 */
:root {
  --forest: #153E2C;      /* 히어로 바탕 */
  --forest-2: #244E34;    /* 칩 바탕 */
  --ink: #183E2C;         /* 본문 글씨 */
  --ink-2: #204530;       /* 제목 */
  --cream: #FFFDF3;       /* 히어로 글씨 */
  --page: #F7F8F2;        /* 페이지 바탕 */
  --card: #EAF1DF;        /* 카드 바탕 */
  --pill: #F1F6DF;        /* 버튼 바탕 */
  --lime: #C9E89A;        /* 히어로 강조 글씨 */
  --line: #DCE3D2;
  --muted: #557060;
  --wrap: 85rem;
  --font: "Pretendard Variable", Pretendard, -apple-system, "Malgun Gothic", sans-serif;
}

* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }
body { margin: 0; background: var(--page); color: var(--ink); font: 400 1.0625rem/1.75 var(--font); word-break: keep-all; overflow-wrap: anywhere; }
a { color: inherit; }
img { max-width: 100%; }
:focus-visible { outline: 3px solid #7FB65A; outline-offset: 3px; border-radius: 6px; }
.skip { position: absolute; left: -999px; top: 0; }
.skip:focus { left: 1rem; top: 1rem; background: var(--cream); padding: .5rem 1rem; z-index: 99; }

/* 머리 */
.site-head { position: sticky; top: 0; z-index: 10; background: rgba(246, 248, 241, .94); backdrop-filter: blur(8px); border-bottom: 1px solid var(--line); }
.head-inner { max-width: var(--wrap); margin: 0 auto; padding: 1rem 1.5rem; display: flex; align-items: center; justify-content: space-between; gap: 1rem; }
.brand { display: inline-flex; align-items: center; gap: .55rem; font-size: 1.35rem; font-weight: 500; text-decoration: none; letter-spacing: -.01em; }
.brand-mark { color: #3E7A55; font-size: 1.4rem; line-height: 1; }
.site-nav { display: flex; gap: 1.6rem; font-size: 1rem; font-weight: 500; }
.site-nav a { text-decoration: none; padding: .3rem 0; border-bottom: 3px solid transparent; }
.site-nav a[aria-current="page"] { font-weight: 700; border-bottom-color: var(--forest); }

main { max-width: var(--wrap); margin: 0 auto; padding: 1.75rem 2rem 4rem; outline: none; }
main:focus, main:focus-visible { outline: none; }

/* 히어로 카드 */
.hero { background: var(--forest); color: var(--cream); border-radius: 24px; padding: clamp(1.75rem, 4vw, 2.4rem); display: grid; grid-template-columns: 1fr 1.1fr; gap: 2.5rem; align-items: center; }
.hero-text { padding: .5rem 0 .5rem .25rem; }
.eyebrow { color: var(--lime); font-size: .95rem; margin: 0 0 1.25rem; }
.hero h1 { font-size: clamp(2.4rem, 4.2vw, 3.35rem); line-height: 1.25; font-weight: 700; letter-spacing: -.035em; margin: 0 0 1.5rem; }
.hero p.lead { margin: 0 0 1.5rem; }
.chips { display: flex; flex-wrap: wrap; gap: .5rem; margin: 0 0 1.25rem; padding: 0; list-style: none; }
.chips li, .chips button { background: var(--forest-2); color: #E4F1CD; border: 1px solid #4F7A5C; border-radius: 6px; padding: .3rem .7rem; font: 400 .95rem/1.6 var(--font); }
.hero .note { font-size: .95rem; margin: 0 0 1.75rem; }
.btn { display: inline-flex; align-items: center; gap: .4rem; background: var(--pill); color: #173F32; font-weight: 600; text-decoration: none; border-radius: 999px; padding: .85rem 1.4rem; border: 0; cursor: pointer; font-size: 1rem; }
.btn:hover { background: #fff; }
.btn.ghost { background: transparent; border: 1px solid var(--line); color: var(--ink); }
.hero-media { display: flex; flex-direction: column; gap: .6rem; }
.hero-media .caption { font-size: .9rem; color: #DCEBCB; }

/* 쇼츠 플레이어 (세로 9:16) */
.short { position: relative; aspect-ratio: 9 / 16; border-radius: 16px; overflow: hidden; background: #0d2419; border: 1px solid rgba(255,255,255,.12); }
.short button { all: unset; cursor: pointer; position: absolute; inset: 0; display: block; }
.short img { width: 100%; height: 100%; object-fit: cover; display: block; }
.short .play { position: absolute; left: 50%; top: 50%; translate: -50% -50%; width: 4rem; height: 4rem; border-radius: 50%; background: rgba(255, 253, 243, .92); display: grid; place-items: center; }
.short .play::before { content: ""; border-left: 1.1rem solid var(--forest); border-top: .7rem solid transparent; border-bottom: .7rem solid transparent; margin-left: .3rem; }
.short iframe { position: absolute; inset: 0; width: 100%; height: 100%; border: 0; }
.short .label { position: absolute; left: 0; right: 0; bottom: 0; padding: 2.5rem 1rem 1rem; color: #fff; font-size: .95rem; font-weight: 600; line-height: 1.45; background: linear-gradient(transparent, rgba(0,0,0,.72)); }
.hero-shorts { display: grid; grid-template-columns: repeat(3, 1fr); gap: .75rem; }

/* 섹션 */
.section { margin-top: 4rem; }
.kicker { color: var(--muted); font-size: .95rem; margin: 0 0 .75rem; }
.section h2 { color: var(--ink-2); font-size: clamp(1.5rem, 2.4vw, 1.75rem); line-height: 1.45; letter-spacing: -.02em; margin: 0 0 1.75rem; font-weight: 700; }
.section-head { display: flex; justify-content: space-between; align-items: end; gap: 1rem; }
.section-head .btn { margin-bottom: 1.75rem; }

/* 카드 */
.cards { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1.75rem; }
.card { background: var(--card); border-radius: 16px; padding: 1.6rem; display: flex; flex-direction: column; text-decoration: none; transition: transform .2s; }
.card:hover { transform: translateY(-3px); }
.card .num { color: var(--muted); font-size: .95rem; font-variant-numeric: tabular-nums; }
.card h3 { font-size: 1.3rem; line-height: 1.45; letter-spacing: -.01em; margin: .4rem 0 .6rem; font-weight: 700; }
.card p { margin: 0 0 1rem; color: #2F5240; }
.card .tag { margin-top: auto; align-self: flex-start; background: var(--page); border-radius: 6px; padding: .15rem .6rem; font-size: .85rem; color: var(--muted); }

/* 글 목록 페이지 */
.page-title { font-size: clamp(2rem, 3.5vw, 2.6rem); letter-spacing: -.03em; margin: 1rem 0 .5rem; color: var(--ink-2); }
.filters { display: flex; flex-wrap: wrap; gap: .5rem; margin: 1.5rem 0 2rem; padding: 0; list-style: none; }
.filters button { font: 500 .95rem/1 var(--font); color: var(--ink); background: transparent; border: 1px solid #B9C9AE; padding: .6rem 1rem; border-radius: 999px; cursor: pointer; }
.filters button[aria-pressed="true"] { background: var(--forest); color: var(--cream); border-color: var(--forest); }
.shorts-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(14rem, 1fr)); gap: 1.25rem; }

/* 본문 */
.article { background: #fff; border: 1px solid var(--line); border-radius: 24px; padding: clamp(1.5rem, 5vw, 3.5rem); }
.article-head { max-width: 42rem; margin: 0 auto 2.5rem; }
.article-head h1 { font-size: clamp(2rem, 4vw, 2.8rem); line-height: 1.3; letter-spacing: -.03em; margin: .5rem 0 0; color: var(--ink-2); }
.article-meta { color: var(--muted); font-size: .95rem; }
.prose { max-width: 42rem; margin: 0 auto; }
.prose h2 { font-size: 1.45rem; margin: 2.5rem 0 .75rem; color: var(--ink-2); }
.prose h3 { font-size: 1.15rem; margin: 2rem 0 .5rem; }
.prose p, .prose ul, .prose ol, .prose blockquote, .prose pre { margin: 0 0 1.25rem; }
.prose img { height: auto; border-radius: 12px; display: block; margin: 1.5rem auto; }
.prose blockquote { background: var(--card); border-radius: 12px; padding: 1rem 1.25rem; margin-left: 0; margin-right: 0; }
.prose blockquote p { margin: 0; }
.prose code { font-family: Consolas, "D2Coding", monospace; font-size: .92em; background: var(--card); padding: .1em .35em; border-radius: 4px; }
.prose pre { background: var(--forest); color: #E4F1CD; padding: 1rem 1.25rem; border-radius: 12px; overflow-x: auto; }
.prose pre code { background: none; padding: 0; color: inherit; }
.prose hr { border: 0; border-top: 1px solid var(--line); margin: 2.5rem 0; }
.prose a { text-decoration-color: #7FB65A; text-decoration-thickness: 2px; text-underline-offset: 3px; }
.prose .short { max-width: 20rem; margin: 1.5rem auto; }
.back { display: inline-block; margin: 2rem 0 0; }

.empty { color: var(--muted); padding: 2rem 0; }

/* 바닥 */
.site-foot { border-top: 1px solid var(--line); margin-top: 2rem; }
.foot-inner { max-width: var(--wrap); margin: 0 auto; padding: 2.5rem 2rem 2.25rem; color: var(--muted); font-size: .95rem; }
.foot-inner .brand { color: var(--ink); font-size: 1.15rem; margin-bottom: .5rem; }
.foot-inner p { margin: .2rem 0; }

@media (max-width: 60rem) {
  .hero { grid-template-columns: 1fr; }
  .cards { grid-template-columns: 1fr; }
}
@media (max-width: 40rem) {
  main { padding: 1rem 1rem 3rem; }
  .head-inner { padding: .8rem 1rem; }
  .site-nav { gap: 1rem; }
  .brand { font-size: 1.15rem; }
  .hero-shorts { grid-template-columns: repeat(3, 1fr); gap: .4rem; }
  .short .label { display: none; }
  .short .play { width: 2.6rem; height: 2.6rem; }
  .section-head { display: block; }
}
@media (prefers-reduced-motion: reduce) {
  * { transition: none !important; scroll-behavior: auto !important; }
}