@charset "utf-8";
@layer reset, form;

:root {
	interpolate-size: allow-keywords;
	--header-height: clamp(60rem, calc(100 / var(--container) * 100vw), 90rem);
	--container-narrow: 1280;
	--container: 990;
	--container-wide: 1762;
	--container-scale: 0.92;
	--container-edge-offset: calc((1 - var(--container-scale)) / 2 * 100vw);
	--primary: #1a509e;
	--secondary: #e87a4a;
	--placeholder-bg: #444444;
	--white: #fff;
	--black: #222;
	--border-color: #ddd; /* components.css 공유 */
	--hover-border-color: #444; /* components.css 공유 */
	--font-pret: "Nanum Gothic", "Pretendard", "Malgun Gothic", "Dotum", "Gulim", sans-serif;
	--font-sans: var(--font-pret);
	--site-menu-button-size: 25rem;
	/* 
     * 사이트 공통 이미지 플레이스홀더 변수
     * 
     * - --placeholder-image-bg : 기본 배경색 (이미지 로딩 실패 또는 미설정 시 표시)
     * - --placeholder-image-url : 플레이스홀더 로고 이미지 경로
     * - --placeholder-image-size : 플레이스홀더 로고 크기 (최대 크기 제한 포함)
     *
     * layout.css 에 선언하여 전역에서 동일한 디자인 컨셉 유지 및 관리.
     * 접근성 향상을 위해 이미지가 없을 경우에도 시각적 빈 공간이 없도록 함.
     */
	--placeholder-image-bg: #e0e0e0;
	--placeholder-image-url: url("/assets/images/layouts/placeholder-image.png");
	--placeholder-image-size: min(60%, 200rem);
}

/* #region view transition, scroll behavior */
@media (prefers-reduced-motion: no-preference) {
	/* @view-transition  { navigation: auto; } */
	html { scroll-behavior: smooth; }
}
/* #endregion view transition, scroll behavior */

#page-top {
    min-height: 100vh;
    padding-bottom: 160rem;

	@media(max-width: 1280px){
		padding: 0;
	}
}

.container { position: relative; width: calc(var(--container-scale) * 100%); max-width: calc(var(--container) * 1rem); margin-inline: auto;
	&.container--narrow { max-width: calc(var(--container-narrow) * 1rem); }
	&.container--wide { max-width: calc(var(--container-wide) * 1rem); }
	&.container--fluid { width: auto; max-width: none; }
}

.site-header {position: relative;border-bottom: 3rem solid #365ec3; z-index: 1;
	.container { display: flex; align-items: center; justify-content: space-between; height: var(--header-height); }
	.logo { position: relative; display: inline-block; justify-self: start; }
	.logo-image {display: block;width: auto;height: clamp(24rem, calc(30 / var(--container) * 100vw), 45rem);}
	.main-nav {
		display: flex; flex-direction: column; align-items: flex-end; gap: 13rem; 
		
		.nav-menu-level-1 {display: flex;gap: 80rem;}
		.nav-item-level-1 { position: relative; }
		.nav-link-level-1 {display: flex;align-items: center;font: 18rem var(--font-sans);font-weight: 600;}
		.nav-menu-level-2 { position: absolute; top: 75%; left: 50%; width: max-content; min-width: 120rem; background: #fff; border: 1px solid #ddd; transform: translateX(-50%); visibility: hidden; opacity: 0; }
		li:hover .nav-menu-level-2 {top: 150%;visibility: visible;opacity: 1;}
		.nav-link-level-2 { display: block; padding: 14rem; font-size: 14rem; text-align: center; color: #333; }
		.nav-link-level-2:hover { color: #fff; background: var(--primary); }
		.nav-item-level-2 + .nav-item-level-2 { border-top: 1px solid #ddd; }

		.nav-lang { display: flex; gap: 10rem; font-size: 14rem; }
		.nav-lang a { display: flex; position: relative; padding-right: 10rem; border-right: 1rem solid #ddd; }
		.nav-lang a:last-child { border: 0; padding: 0; }

		@media (prefers-reduced-motion: no-preference) {
			.nav-menu-level-2 { transition: 0.3s; }
		}
		@media (width < 1280px) {
			& { display: none; }
		}
	}
	.site-menu-toggle {position: relative;display: block;width: var(--site-menu-button-size);aspect-ratio: 1;cursor: pointer;display: none;
		.bar { position: absolute; inset: 0; height: 2px; margin: auto; background: currentcolor; }
		.bar-1 { translate: 0 -8rem; }
		.bar-3 { translate: 0 8rem; }

		@media(max-width: 1280px) {
			display: block;
		}
	}
	.site-menu { --border-color: #eaeaea; --padding-block: 15rem; --padding-inline: 16rem; left: auto; z-index: 12; width: 100%; max-width: 280rem; height: 100dvh; padding: 0; color: #000; background: #fff; border: 0;
		&::backdrop { background: #000; }
		.site-menu-header { display: grid; align-items: center; justify-content: flex-end; height: var(--header-height); }
		.site-menu-close { position: relative; display: block; width: var(--site-menu-button-size); aspect-ratio: 1; margin-right: 16rem; background: 0;
			&::before, &::after { position: absolute; top: 50%; left: 0; display: block; width: 100%; height: 2px; background: currentcolor; transform: translateY(-50%) rotate(45deg); content: ""; }
			&::after { transform: translateY(-50%) rotate(-45deg); }
		}
		.nav-menu-level-1 {
			& > li { border-top: 1px solid var(--border-color); }
			& > li:last-child { border-bottom: 1px solid var(--border-color); }
			.nav-link-level-1 { position: relative; display: block; width: 100%; padding: var(--padding-block) 30rem var(--padding-block) var(--padding-inline); font-size: 16rem; text-align: left; }
			summary.nav-link-level-1::before { position: absolute; inset: 0; display: block; width: 8rem; aspect-ratio: 1; margin: auto 16rem auto auto; border: solid currentcolor; border-width: 0 1px 1px 0; transform: rotate(45deg) translateY(-75%); content: ""; }
			[open] summary.nav-link-level-1::before { translate: 0 -50%; scale: 1 -1; }
			::details-content { height: 0; overflow: clip; }
			[open]::details-content { height: auto; }
			.nav-menu-level-2 { background: #f8f8f8; }
			.nav-menu-level-2 > li { border-top: 1px solid var(--border-color); }
			.nav-link-level-2 { position: relative; display: block; padding: var(--padding-block) var(--padding-inline); font-size: 14rem; }
		}
		@media (prefers-reduced-motion: no-preference) {
			& { translate: 100%; transition: 0.3s allow-discrete; }
			&::backdrop { opacity: 0; transition: 0.3s allow-discrete; }
			&:popover-open { translate: 0;
				&::backdrop { opacity: 0.6; }
				@starting-style { translate: 100%;
					&::backdrop { opacity: 0; }
				}
			}
			.nav-menu-level-1 {
				.nav-link-level-1, summary::before, ::details-content { transition: 0.3s allow-discrete; }
				::details-content { height: 0; overflow: clip; }
				[open]::details-content { height: auto; }
			}
		}
	}
}

.site-footer {position: absolute;width: 100%;padding-block: 40rem 60rem;color: #999;background: #302f33;bottom: 0;margin-top: auto;

	.container { display: flex; align-items: center; gap: 50rem; }
	.nav-menu { display: flex; flex-wrap: wrap; gap: 0.5lh 2ch; }
	.site-info-list {display: flex;flex-wrap: wrap;gap: 7rem 30rem;font-size: 13rem;}
	.site-info-item {display: inline-flex;}
	.copyright { margin-top: 26rem; }
	.f-logo { height: 60rem; }

	@media(max-width: 1280px){
		position: relative;
		
	}
	@media(max-width: 767px){
		.container { flex-direction: column; gap: 30rem; align-items: flex-start; }
	}
}