/* One OI 웨비나 랜딩 — 스타일 */

:root {
	--ink: #111827;
	--ink-soft: #4b5563;
	--ink-faint: #9ca3af;
	--line: #e5e7eb;
	--bg: #ffffff;
	--bg-soft: #f7f8fa;
	--brand: #1a4fd6;
	--brand-dark: #133ba3;
	--max: 1080px;
	--radius: 10px;
}

* { box-sizing: border-box; }

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

body {
	margin: 0;
	background: var(--bg);
	color: var(--ink);
	font-family: "Pretendard", "Apple SD Gothic Neo", "Malgun Gothic", "맑은 고딕", system-ui, -apple-system, sans-serif;
	font-size: 16px;
	line-height: 1.65;
	word-break: keep-all;
	overflow-x: hidden;
}

img { max-width: 100%; height: auto; display: block; }

[hidden] { display: none !important; }

.wrap {
	width: 100%;
	max-width: var(--max);
	margin: 0 auto;
	padding: 0 20px;
}

/* ---------- 헤더 ---------- */

.site-head {
	border-bottom: 1px solid var(--line);
	padding: 16px 0;
}

.site-head .wrap {
	display: flex;
	align-items: center;
	justify-content: space-between;
	gap: 12px;
}

.brand {
	font-weight: 700;
	font-size: 17px;
	letter-spacing: -0.01em;
	color: var(--ink);
	text-decoration: none;
}

.brand span { color: var(--brand); }

/* ---------- 히어로 ---------- */

.hero {
	background: var(--bg-soft);
	border-bottom: 1px solid var(--line);
	padding: 48px 0 56px;
}

.hero .wrap {
	display: grid;
	grid-template-columns: 1fr 1fr;
	gap: 48px;
	align-items: start;
}

.hero-copy h1 {
	margin: 0 0 14px;
	font-size: 34px;
	line-height: 1.3;
	letter-spacing: -0.02em;
	font-weight: 800;
}

.hero-copy .lede {
	margin: 0 0 24px;
	font-size: 17px;
	color: var(--ink-soft);
}

.meta {
	list-style: none;
	margin: 0;
	padding: 0;
	border-top: 1px solid var(--line);
}

.meta li {
	display: flex;
	gap: 14px;
	padding: 11px 0;
	border-bottom: 1px solid var(--line);
	font-size: 15px;
}

.meta dt,
.meta .k {
	flex: 0 0 76px;
	color: var(--ink-faint);
	font-weight: 600;
}

.meta .v { color: var(--ink); font-weight: 500; }

/* ---------- 폼 ---------- */

.form-card {
	background: #fff;
	border: 1px solid var(--line);
	border-radius: var(--radius);
	padding: 24px;
	box-shadow: 0 1px 2px rgba(17, 24, 39, 0.04);
}

.form-card h2 {
	margin: 0 0 4px;
	font-size: 19px;
	font-weight: 700;
}

.form-card .form-sub {
	margin: 0 0 18px;
	font-size: 14px;
	color: var(--ink-soft);
}

.form-block { position: relative; min-height: 420px; }

.form-block iframe {
	width: 100%;
	border: 0;
	display: block;
}

.form-block.is-static-height iframe { height: 760px; }

/* 스켈레톤 */

.skeleton { display: grid; gap: 14px; padding-top: 4px; }

.skeleton i {
	display: block;
	height: 44px;
	border-radius: 6px;
	background: linear-gradient(90deg, #eef0f3 25%, #e2e5ea 37%, #eef0f3 63%);
	background-size: 400% 100%;
	animation: shimmer 1.3s ease-in-out infinite;
}

.skeleton i:nth-child(4) { height: 88px; }
.skeleton i:nth-child(5) { width: 40%; }

@keyframes shimmer {
	0%   { background-position: 100% 50%; }
	100% { background-position: 0 50%; }
}

@media (prefers-reduced-motion: reduce) {
	.skeleton i { animation: none; }
}

/* 대체 링크 / 안내 */

.notice {
	margin: 14px 0 0;
	padding: 14px 16px;
	background: #fff8e6;
	border: 1px solid #f2dfa8;
	border-radius: 8px;
	font-size: 14px;
	color: #7a5b13;
}

.btn {
	display: inline-block;
	padding: 12px 20px;
	border-radius: 8px;
	background: var(--brand);
	color: #fff;
	font-weight: 700;
	font-size: 15px;
	text-decoration: none;
	border: 1px solid var(--brand);
	cursor: pointer;
}

.btn:hover { background: var(--brand-dark); border-color: var(--brand-dark); }

.btn--ghost {
	background: #fff;
	color: var(--brand);
}

.btn--ghost:hover { background: #f3f6ff; }

/* ---------- 본문 섹션 ---------- */

section.band { padding: 56px 0; border-bottom: 1px solid var(--line); }

section.band.alt { background: var(--bg-soft); }

section.band h2 {
	margin: 0 0 8px;
	font-size: 25px;
	letter-spacing: -0.02em;
	font-weight: 800;
}

section.band .band-sub {
	margin: 0 0 28px;
	color: var(--ink-soft);
	font-size: 16px;
}

.cards {
	display: grid;
	grid-template-columns: repeat(2, 1fr);
	gap: 18px;
	list-style: none;
	margin: 0;
	padding: 0;
}

.cards li {
	background: #fff;
	border: 1px solid var(--line);
	border-radius: var(--radius);
	padding: 22px;
}

.cards h3 {
	margin: 0 0 6px;
	font-size: 17px;
	font-weight: 700;
}

.cards p { margin: 0; color: var(--ink-soft); font-size: 15px; }

/* 연사 */

.speaker {
	display: grid;
	grid-template-columns: 148px 1fr;
	gap: 24px;
	align-items: start;
}

.speaker img {
	width: 148px;
	height: 148px;
	border-radius: 12px;
	object-fit: cover;
	background: var(--bg-soft);
}

.speaker h3 { margin: 0 0 2px; font-size: 19px; font-weight: 700; }
.speaker .role { margin: 0 0 12px; color: var(--ink-faint); font-size: 15px; }
.speaker .bio { margin: 0; color: var(--ink-soft); }

/* FAQ */

.faq { margin: 0; }

.faq details {
	border-bottom: 1px solid var(--line);
	padding: 16px 0;
}

.faq summary {
	cursor: pointer;
	font-weight: 700;
	font-size: 16px;
	list-style: none;
}

.faq summary::-webkit-details-marker { display: none; }

.faq summary::before {
	content: "Q. ";
	color: var(--brand);
}

.faq p { margin: 10px 0 0; color: var(--ink-soft); }

/* ---------- 완료 페이지 ---------- */

.thanks {
	padding: 72px 0 80px;
	text-align: center;
}

.thanks h1 {
	margin: 0 0 12px;
	font-size: 30px;
	font-weight: 800;
	letter-spacing: -0.02em;
}

.thanks .lede {
	margin: 0 auto 28px;
	max-width: 560px;
	color: var(--ink-soft);
	font-size: 17px;
}

.thanks .meta {
	max-width: 480px;
	margin: 0 auto 28px;
	text-align: left;
}

.actions {
	display: flex;
	gap: 12px;
	justify-content: center;
	flex-wrap: wrap;
}

/* ---------- 푸터 ---------- */

.site-foot {
	padding: 28px 0 40px;
	font-size: 13px;
	color: var(--ink-faint);
}

.site-foot a { color: var(--ink-faint); }

/* ---------- 미리보기 표시 ---------- */

.is-empty {
	background: #fff3cd;
	color: #8a6d1b;
	padding: 0 6px;
	border-radius: 4px;
	font-weight: 600;
}

/* ---------- 반응형 ---------- */

@media (max-width: 900px) {
	.hero .wrap { grid-template-columns: 1fr; gap: 32px; }
	.hero-copy h1 { font-size: 28px; }
	.cards { grid-template-columns: 1fr; }
}

@media (max-width: 600px) {
	.wrap { padding: 0 16px; }
	.hero { padding: 32px 0 40px; }
	section.band { padding: 40px 0; }
	.hero-copy h1 { font-size: 25px; }
	.form-card { padding: 18px; }
	.speaker { grid-template-columns: 1fr; }
	.speaker img { width: 120px; height: 120px; }
	.meta dt, .meta .k { flex-basis: 64px; }
	.actions { flex-direction: column; }
	.actions .btn { width: 100%; text-align: center; }
}