/*
 * IdP 로그인·회원가입·홈 공용 스타일.
 *
 * 외부 CDN 을 쓰지 않는다 — 로그인 화면은 인가 흐름 한가운데 낀 페이지라, 외부 호스트가
 * 죽으면 로그인이 같이 죽는다. 폰트도 시스템 스택으로 해결한다.
 */

:root {
	--bg: #f2f4f6;
	--surface: #ffffff;
	--text: #191f28;
	--text-weak: #8b95a1;
	--text-weaker: #b0b8c1;
	--field: #f2f4f6;
	--field-focus: #ffffff;
	--primary: #3182f6;
	--primary-hover: #1b64da;
	--primary-weak: #e8f3ff;
	--danger: #f04452;
	--danger-weak: #fdeced;
	--success-weak: #e7f9f0;
	--success-text: #02845c;
	--border: #e5e8eb;
	--ring: rgba(49, 130, 246, 0.28);
	--shadow: 0 4px 24px rgba(0, 0, 0, 0.06), 0 1px 2px rgba(0, 0, 0, 0.04);
}

@media (prefers-color-scheme: dark) {
	:root {
		--bg: #17171c;
		--surface: #212127;
		--text: #f4f4f5;
		--text-weak: #9ea4aa;
		--text-weaker: #6b7178;
		--field: #2b2b33;
		--field-focus: #32323b;
		--primary: #4593fc;
		--primary-hover: #6aa9fd;
		--primary-weak: #1c2c44;
		--danger: #ff6b78;
		--danger-weak: #3a2226;
		--success-weak: #16332a;
		--success-text: #5fd0a5;
		--border: #33343a;
		--ring: rgba(69, 147, 252, 0.35);
		--shadow: 0 4px 24px rgba(0, 0, 0, 0.4), 0 1px 2px rgba(0, 0, 0, 0.3);
	}
}

* {
	box-sizing: border-box;
}

body {
	margin: 0;
	padding: 24px;
	min-height: 100vh;
	display: flex;
	align-items: center;
	justify-content: center;
	background: var(--bg);
	color: var(--text);
	font-family: system-ui, -apple-system, "Segoe UI", Roboto, "Apple SD Gothic Neo",
		"Noto Sans KR", "Malgun Gothic", sans-serif;
	font-size: 15px;
	line-height: 1.5;
	-webkit-font-smoothing: antialiased;
}

.card {
	width: 100%;
	max-width: 400px;
	padding: 40px 32px 32px;
	background: var(--surface);
	border-radius: 20px;
	box-shadow: var(--shadow);
}

.brand {
	display: inline-block;
	margin-bottom: 20px;
	padding: 4px 10px;
	border-radius: 8px;
	background: var(--primary-weak);
	color: var(--primary);
	font-size: 12px;
	font-weight: 700;
	letter-spacing: 0.02em;
}

h1 {
	margin: 0 0 8px;
	font-size: 24px;
	font-weight: 700;
	letter-spacing: -0.02em;
}

.subtitle {
	margin: 0 0 28px;
	color: var(--text-weak);
	font-size: 14px;
}

/* 안내 배너 — ?registered, ?logout, ?error */
.banner {
	margin: 0 0 20px;
	padding: 12px 14px;
	border-radius: 12px;
	font-size: 14px;
	font-weight: 500;
}

.banner-success {
	background: var(--success-weak);
	color: var(--success-text);
}

.banner-info {
	background: var(--primary-weak);
	color: var(--primary);
}

.banner-error {
	background: var(--danger-weak);
	color: var(--danger);
}

.field {
	margin-bottom: 16px;
}

label {
	display: block;
	margin-bottom: 6px;
	font-size: 13px;
	font-weight: 600;
	color: var(--text-weak);
}

input[type="text"],
input[type="email"],
input[type="password"] {
	width: 100%;
	height: 52px;
	padding: 0 16px;
	border: 1px solid transparent;
	border-radius: 12px;
	background: var(--field);
	color: var(--text);
	font-family: inherit;
	font-size: 15px;
	transition: background 0.15s, border-color 0.15s, box-shadow 0.15s;
}

input::placeholder {
	color: var(--text-weaker);
}

input:focus {
	outline: none;
	background: var(--field-focus);
	border-color: var(--primary);
	box-shadow: 0 0 0 3px var(--ring);
}

input.has-error {
	border-color: var(--danger);
}

.error {
	margin: 6px 0 0;
	color: var(--danger);
	font-size: 13px;
}

button {
	width: 100%;
	height: 52px;
	margin-top: 12px;
	border: 0;
	border-radius: 12px;
	background: var(--primary);
	color: #ffffff;
	font-family: inherit;
	font-size: 16px;
	font-weight: 700;
	cursor: pointer;
	transition: background 0.15s, transform 0.05s;
}

button:hover {
	background: var(--primary-hover);
}

button:active {
	transform: scale(0.99);
}

button:focus-visible {
	outline: none;
	box-shadow: 0 0 0 3px var(--ring);
}

.button-quiet {
	background: var(--field);
	color: var(--text-weak);
}

.button-quiet:hover {
	background: var(--border);
}

.footer {
	margin: 24px 0 0;
	text-align: center;
	font-size: 14px;
	color: var(--text-weak);
}

a {
	color: var(--primary);
	font-weight: 600;
	text-decoration: none;
}

a:hover {
	text-decoration: underline;
}

/* 홈 화면 */
.identity {
	margin-bottom: 24px;
	padding: 16px;
	border-radius: 12px;
	background: var(--field);
}

.identity-label {
	font-size: 12px;
	font-weight: 600;
	color: var(--text-weak);
}

.identity-value {
	margin-top: 2px;
	font-size: 18px;
	font-weight: 700;
	word-break: break-all;
}