:root {
    --link-color: #0170b9;
    --link-hover: #063b5e;
    --title-color: #3a3a3a;
    --text-color: #4b4f58;
    --border-color: #ccc;
    --footer-color: #333333;
    --bg-color: #ffffff;
    --required: #dc3545;
    --border-focus: var(--link-color);
    --shadow-color: #0000001a;
    --shadow-focus: #0170b940;
    --button-color: white;
    --select-arrow: var(--text-color);
}

body {
    font-family: -apple-system, BlinkMacSystemFont, Segoe UI, Roboto, Oxygen-Sans, Ubuntu, Cantarell, Helvetica Neue, sans-serif;
    font-weight: 400;
    color: var(--text-color);
    background-color: var(--bg-color);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    max-width: 800px;
    margin: 0 auto;
    padding: 20px 0 20px 0;
}

header {
    display: flex;
    align-items: flex-end;
    justify-content: space-between;
    border-bottom: 1px solid var(--border-color);
    margin-bottom: 40px;
}

footer {
    color: var(--footer-color);
    padding: 20px 0;
    text-align: center;
    font-size: 0.9rem;
    width: 100%;
    margin-top: 40px;
    border-top: 1px solid var(--border-color);
}

.footer-content {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

.footer-content p {
    margin: 0;
    line-height: 1.5;
    opacity: 0.85;
}

header .title-container {
    display: flex;
    align-items: center;
    padding-bottom: 10px;
}

header .title-container * {
    color: dark-gray;
}

header .logo {
    height: 98px;
    margin-right: 20px;
}

header h1 {
    margin: 0;
    line-height: 1.3em;
}

h1 {
    font-size: 32px;
    font-weight: 600;
}

h2 {
    font-size: 24px;
    font-weight: 600;
}

h3 {
    font-size: 18px;
    font-weight: 600;
}

h4 {
    font-size: 14px;
    font-weight: 700;
}

.treneri h2 {
    margin: 0 0 0.4em 0;
}

.treneri h4 {
    margin: 0;
}

a {
    color: var(--link-color);
}

a:hover {
    color: var(--link-hover);
}

.dark-gray {
    color: #3a3a3a;
}

.undecorated {
    text-decoration: none;
}

.navbar {
    overflow: hidden;
    margin-bottom: -2px;
}

.navbar * {
    font-weight: 600;
    text-decoration: none;
}

.navbar ul {
    list-style-type: none;
    margin: 0;
    padding: 0;
    display: flex;
    gap: 5px;
}

.navbar li {
    flex: 1;
    padding: 0px 5px 3px 5px;
}

.navbar li:not(.active) {
    border-bottom: 2px solid transparent;
}

.navbar li.active {
    border-bottom: 2px solid var(--link-color);
}

.navbar li.active:hover {
    border-bottom: 2px solid var(--link-hover);
}

main {
    display: block;
}

article {
    margin-bottom: 20px;
}

hr {
    border: none;
    border-top: 1px solid var(--border-color);
    margin: 40px 0 40px 0;
}

.two-columns {
    display: flex;
    flex-wrap: wrap;
    gap: 20px;
    margin-bottom: 20px;
}

.column {
    flex: 1;
    min-width: 250px;
    color: var(--text-color);
}

.notes {
    margin-top: 5px;
}

.notes p {
    margin: 5px 0;
    line-height: 1.4;
    font-size: 0.9rem;
}

table {
    width: 100%;
    border-collapse: collapse;
    color: var(--text-color);
    font-size: 0.95rem;
    margin-bottom: 10px;
}

th,
td {
    padding: 10px 12px;
    text-align: left;
    border-bottom: 1px solid var(--border-color);
}

th {
    font-weight: 700;
    background-color: var(--background-color);
    border-bottom: 2px solid var(--border-color);
}

.application {
    margin: 0 auto;
    padding: 20px;
    border-radius: 8px;
    box-shadow: 0 2px 10px var(--shadow-color);
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 20px;
}

.form-group {
    margin-bottom: 20px;
    display: flex;
    flex-direction: column;
}

.form-group:has(input[type="checkbox"]) {
    flex-direction: row;
    align-items: center;
    gap: 8px;
    margin-bottom: 10px;
}

.form-group:has(input[type="checkbox"])>label {
    font-weight: 400;
}

.form-group.full-width {
    grid-column: 1 / -1;
}

.form-group label {
    font-weight: bold;
    margin-bottom: 5px;
}

.form-group label:after {
    content: "";
}

.form-group:has(input[required]) label::after,
.form-group:has(select[required]) label::after,
.form-group:has(textarea[required]) label::after {
    content: " *";
    color: var(--required);
}

input[type="text"],
input[type="email"],
input[type="tel"],
input[type="date"],
input[type="number"],
select,
textarea {
    padding: 12px;
    border: 1px solid var(--border-color);
    border-radius: 4px;
    font-size: 16px;
    height: 44px;
    width: 100%;
    box-sizing: border-box;
    transition: border-color 0.3s ease;
}

select {
    appearance: none;
    -webkit-appearance: none;
    -moz-appearance: none;
    cursor: pointer;
    position: relative;
    padding-right: 30px;
    background-image: url('data:image/svg+xml;utf8,<svg xmlns="http://www.w3.org/2000/svg" width="10" height="6" viewBox="0 0 10 6"><polygon points="0,0 10,0 5,6" fill="%23333"/></svg>');
    background-repeat: no-repeat;
    background-position: right 10px center;
    background-size: 10px;
}

input:focus,
select:focus,
textarea:focus {
    outline: none;
    border-color: var(--border-focus);
    box-shadow: 0 0 0 0.2rem var(--shadow-focus);
}

textarea {
    resize: vertical;
}

input[type="checkbox"] {
    width: auto;
    margin-right: 8px;
}

.checkbox-label {
    /* Prázdné, ale pro flex alignment */
}

.submit-btn {
    background-color: var(--link-color);
    color: var(--button-color);
    padding: 12px 24px;
    border: none;
    border-radius: 4px;
    font-size: 16px;
    font-weight: bold;
    cursor: pointer;
    width: 100%;
    transition: background-color 0.3s ease;
}

.submit-btn:hover {
    background-color: var(--link-hover);
}

.submit-btn:active {
    transform: translateY(1px);
}

@media (max-width: 768px) {
    footer {
        padding: 15px 0;
        font-size: 0.85rem;
    }

    .two-columns {
        flex-direction: column;
    }

    .application {
        grid-template-columns: 1fr;
        padding: 15px;
        margin: 10px;
        gap: 15px;
    }

    .form-group.full-width {
        grid-column: 1;
    }
}