/* 교사 로그인 페이지 CSS (중간톤 라이트 모드) */
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700;800;900&display=swap');
@import url('https://fonts.googleapis.com/css2?family=Noto+Sans+KR:wght@300;400;500;600;700;800;900&display=swap');

:root {
	--primary-red: #e85d75;
	--primary-blue: #5c7cfa;
	--light-bg: #f8fafc;
	--light-surface: #ffffff;
	--light-card: #f1f5f9;
	--text-primary: #1e293b;
	--text-secondary: #64748b;
	--text-muted: #94a3b8;
	--border-color: #e2e8f0;
	--gradient-primary: linear-gradient(135deg, var(--primary-red) 0%, var(--primary-blue) 100%);
	--gradient-light: linear-gradient(135deg, #f8fafc 0%, #ffffff 100%);
}

* {
	margin: 0;
	padding: 0;
	box-sizing: border-box;
}

body {
	background: var(--gradient-light);
	color: var(--text-primary);
	font-family: 'Noto Sans KR', 'Inter', sans-serif;
	line-height: 1.6;
	min-height: 100vh;
	display: flex;
	align-items: center;
	justify-content: center;
}

.login-container {
	background: var(--light-surface);
	border: 1px solid var(--border-color);
	border-radius: 16px;
	padding: 3rem;
	width: 100%;
	max-width: 450px;
	box-shadow: 0 20px 60px rgba(0, 0, 0, 0.1);
	position: relative;
	overflow: hidden;
}

.login-container::before {
	content: '';
	position: absolute;
	top: 0;
	left: 0;
	right: 0;
	height: 4px;
	background: var(--gradient-primary);
}

.login-header {
	text-align: center;
	margin-bottom: 2.5rem;
}

.school-logo {
	width: 80px;
	height: 80px;
	background: var(--gradient-primary);
	border-radius: 20px;
	display: flex;
	align-items: center;
	justify-content: center;
	margin: 0 auto 1.5rem;
	font-size: 2rem;
	color: white;
	box-shadow: 0 8px 25px rgba(232, 93, 117, 0.2);
}

.login-header h1 {
	font-size: 1.8rem;
	font-weight: 700;
	margin-bottom: 0.5rem;
	color: var(--text-primary);
}

.login-header p {
	color: var(--text-secondary);
	font-size: 1rem;
}

.login-form {
	display: flex;
	flex-direction: column;
	gap: 1.5rem;
}

.form-group {
	position: relative;
}

.form-group input {
	width: 100%;
	padding: 1rem 1rem 1rem 3rem;
	background: var(--light-card);
	border: 1px solid var(--border-color);
	border-radius: 8px;
	color: var(--text-primary);
	font-size: 1rem;
	transition: all 0.3s ease;
}

.form-group input:focus {
	outline: none;
	border-color: var(--primary-red);
	background: white;
	box-shadow: 0 0 0 3px rgba(232, 93, 117, 0.1);
}

.form-group input::placeholder {
	color: var(--text-muted);
}

.form-group .icon {
	position: absolute;
	left: 1rem;
	top: 50%;
	transform: translateY(-50%);
	color: var(--text-muted);
	font-size: 1.1rem;
}

.form-group input:focus + .icon {
	color: var(--primary-red);
}

.login-options {
	display: flex;
	justify-content: space-between;
	align-items: center;
	margin: 1rem 0;
}

.remember-me {
	display: flex;
	align-items: center;
	gap: 0.5rem;
	color: var(--text-secondary);
	font-size: 0.9rem;
}

.remember-me input[type="checkbox"] {
	width: 18px;
	height: 18px;
	accent-color: var(--primary-red);
}

.forgot-password {
	color: var(--primary-blue);
	text-decoration: none;
	font-size: 0.9rem;
	transition: color 0.3s ease;
}

.forgot-password:hover {
	color: var(--primary-red);
}

.login-btn {
	background: var(--gradient-primary);
	color: white;
	border: none;
	padding: 1rem 2rem;
	border-radius: 8px;
	font-size: 1rem;
	font-weight: 600;
	cursor: pointer;
	transition: all 0.3s ease;
	text-transform: uppercase;
	letter-spacing: 0.5px;
	position: relative;
	overflow: hidden;
}

.login-btn:hover {
	transform: translateY(-2px);
	box-shadow: 0 12px 35px rgba(232, 93, 117, 0.4);
}

.login-btn:active {
	transform: translateY(0);
}

.login-btn:disabled {
	opacity: 0.6;
	cursor: not-allowed;
	transform: none;
	box-shadow: none;
}

.loading-spinner {
	display: none;
	position: absolute;
	top: 50%;
	left: 50%;
	transform: translate(-50%, -50%);
	width: 20px;
	height: 20px;
	border: 2px solid transparent;
	border-top: 2px solid white;
	border-radius: 50%;
	animation: spin 1s linear infinite;
}

@keyframes spin {
	0% { transform: translate(-50%, -50%) rotate(0deg); }
	100% { transform: translate(-50%, -50%) rotate(360deg); }
}

.error-message {
	background: rgba(239, 68, 68, 0.1);
	border: 1px solid #ef4444;
	color: #ef4444;
	padding: 1rem;
	border-radius: 8px;
	font-size: 0.9rem;
	margin-top: 1rem;
	display: none;
	text-align: center;
}

.error-message.show {
	display: block;
	animation: slideIn 0.3s ease;
}

@keyframes slideIn {
	from {
		opacity: 0;
		transform: translateY(-10px);
	}
	to {
		opacity: 1;
		transform: translateY(0);
	}
}

.login-footer {
	text-align: center;
	margin-top: 2rem;
	padding-top: 2rem;
	border-top: 1px solid var(--border-color);
}

.login-footer a {
	color: var(--text-secondary);
	text-decoration: none;
	transition: color 0.3s ease;
}

.login-footer a:hover {
	color: var(--primary-red);
}

.back-to-home {
	position: absolute;
	top: 2rem;
	left: 2rem;
	color: var(--text-secondary);
	text-decoration: none;
	display: flex;
	align-items: center;
	gap: 0.5rem;
	transition: color 0.3s ease;
	background: white;
	padding: 0.75rem 1rem;
	border-radius: 8px;
	border: 1px solid var(--border-color);
	box-shadow: 0 2px 8px rgba(0, 0, 0, 0.05);
}

.back-to-home:hover {
	color: var(--primary-red);
	border-color: var(--primary-red);
}

.theme-toggle {
	position: absolute;
	top: 2rem;
	right: 2rem;
	background: white;
	border: 1px solid var(--border-color);
	color: var(--text-secondary);
	padding: 0.75rem;
	border-radius: 8px;
	cursor: pointer;
	transition: all 0.3s ease;
	box-shadow: 0 2px 8px rgba(0, 0, 0, 0.05);
}

.theme-toggle:hover {
	color: var(--primary-red);
	border-color: var(--primary-red);
}

/* 반응형 */
@media screen and (max-width: 768px) {
	.login-container {
		margin: 1rem;
		padding: 2rem;
	}
	
	.back-to-home {
		top: 1rem;
		left: 1rem;
	}
	
	.theme-toggle {
		top: 1rem;
		right: 1rem;
	}
}