:root {
	--dark-blue: #143958;
	--light-gray: #f1f2f2;
	--gold: #fab90a;
}

body {
	font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
	line-height: 1.6;
	background: var(--light-gray);
	color: #2c3e50;
	padding: 20px;
	margin: 0;
}

.container {
	max-width: 800px;
	margin: 0 auto;
	background: white;
	padding: 30px;
	border-radius: 15px;
	box-shadow: 0 5px 15px rgba(0, 0, 0, 0.2);
	border: 2px solid var(--gold);
}

h1,
h2,
h3 {
	color: var(--dark-blue);
	border-bottom: 2px solid var(--gold);
	padding-bottom: 8px;
}

h1 {
	text-align: center;
	color: var(--gold);
	background-color: var(--dark-blue);
	padding: 15px;
	border-radius: 10px;
	margin-top: 0;
}

.explanation {
	background: var(--light-gray);
	padding: 20px;
	border-radius: 10px;
	margin: 20px 0;
	border-left: 5px solid var(--gold);
}

.formula {
	background: var(--light-gray);
	padding: 15px;
	border-radius: 8px;
	margin: 15px 0;
	text-align: center;
	border: 1px dashed var(--dark-blue);
}

.step {
	background: var(--light-gray);
	padding: 15px;
	border-radius: 8px;
	margin: 15px 0;
	counter-increment: step-counter;
	position: relative;
}

.step::before {
	content: 'Krok ' counter(step-counter);
	position: absolute;
	top: -10px;
	left: 10px;
	background: var(--dark-blue);
	padding: 2px 10px;
	border-radius: 15px;
	font-size: 0.8em;
	color: white;
}

.note {
	font-size: 0.8em;
	color: #666;
	font-style: italic;
	margin: 5px 0;
}

.result {
	background: var(--light-gray);
	padding: 20px;
	border-radius: 8px;
	margin-top: 30px;
	text-align: center;
	font-weight: bold;
	font-size: 1.2em;
	border: 2px solid var(--gold);
}

.dc-statik-result {
	background: var(--dark-blue);
	color: white;
	padding: 20px;
	border-radius: 8px;
	margin-top: 20px;
	text-align: center;
	font-weight: bold;
	font-size: 1.3em;
	border: 3px solid var(--gold);
	box-shadow: 0 4px 8px rgba(0, 0, 0, 0.2);
}

.dc-statik-field {
	display: inline-block;
	background: white;
	color: var(--dark-blue);
	padding: 10px 15px;
	border-radius: 5px;
	margin: 10px 5px;
	min-width: 100px;
	font-family: 'Courier New', monospace;
}

.explanation-note {
	font-size: 0.75em;
	color: var(--light-gray);
	margin-top: 15px;
	text-align: left;
	background: rgba(20, 57, 88, 0.7);
	padding: 10px;
	border-radius: 5px;
}

.explanation-note p {
	margin: 5px 0;
}

.explanation-note ol {
	margin: 5px 0;
	padding-left: 25px;
}

input,
select {
	padding: 8px;
	border: 1px solid var(--dark-blue);
	border-radius: 5px;
	margin: 5px 0;
	width: 200px;
}

button {
	background: var(--gold);
	color: white;
	border: none;
	padding: 10px 20px;
	border-radius: 5px;
	cursor: pointer;
	transition: 0.3s;
	font-weight: bold;
	margin: 20px 0;
}

button:hover {
	background: var(--dark-blue);
}

.calculation-steps {
	background: var(--light-gray);
	padding: 15px;
	border-radius: 10px;
	margin-top: 20px;
	counter-reset: step-counter;
}

table {
	width: 100%;
	border-collapse: collapse;
	margin: 15px 0;
}

th,
td {
	border: 1px solid var(--dark-blue);
	padding: 8px;
	text-align: left;
}

th {
	background-color: var(--dark-blue);
	color: white;
}

.math-box {
	background: white;
	padding: 10px 15px;
	border-radius: 5px;
	margin: 10px 0;
	box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
	overflow-x: auto;
}

.math-step {
	margin-bottom: 10px;
}

.wood-type {
	display: flex;
	align-items: center;
	margin-bottom: 10px;
}

.wood-type label {
	min-width: 150px;
}

.custom-e {
	display: none;
}

.custom-e.active {
	display: block;
	margin-top: 8px;
}