:root {
    /* --- Farben --- */
    --color-primary-blue: #14619f; /* RGB(20, 97, 159) */
    --color-primary-blue-rgb: 20, 97, 159; /* RGB(20, 97, 159) */
    --color-secondary-sand: #f1ece8; /* RGB(241, 236, 232) */
    --color-secondary-sand-rgb: 241, 236, 232; /* RGB(241, 236, 232) */
    --color-dark-blue: #00040e; /* RGB(0, 4, 14) */
    --color-dark-blue-rgb: 0, 4, 14; /* RGB(0, 4, 14) */
    --color-white: #ffffff;
    --color-white-rgb: 255, 255, 255;
    --color-black: #000000;
    --color-black-rgb: 0, 0, 0;
    --color-light-gray: #333333;

    --color-semi-transparent-white-70: rgba(255, 255, 255, 0.7);
    --color-semi-transparent-white-90: rgba(255, 255, 255, 0.9);
    --color-semi-transparent-white-95: rgba(255, 255, 255, 0.95);
    --color-semi-transparent-white-80: rgba(255, 255, 255, 0.8);
    --color-semi-transparent-black-10: rgba(0, 0, 0, 0.1);

    /* --- Schrift --- */
    --font-family-main: "Kozuka Mincho", serif;

    --font-size-base: 18px;
    --font-size-small: 0.9rem;
    --font-size-smaller: 0.85rem;
    --font-size-large-paragraph: 25px;
    --font-size-h1: 2.5rem;
    --font-size-h2: 2rem;
    --font-size-h3: 1.5rem;

    --line-height-base: 1.6;
    --line-height-heading-h1: 1.2;
    --line-height-heading-h2: 1.3;
    --line-height-heading-h3: 1.4;

    /* --- Abstände --- */
    --spacing-base: 20px;
    --spacing-small: 20px;
    --spacing-tiny: 10px;
    --spacing-menu-padding: 8px 16px;
    --spacing-section-padding: 30px 30px 120px 30px;
    --spacing-section-padding-mobile: 20px;
    --spacing-content-max-width: 700px;

    --border-radius: 4px;
    --border-radius-large: 8px;
    --transition-standard: all 0.3s ease;
    --box-shadow-standard: 0px 4px 8px var(--color-semi-transparent-black-10);
    --logo-max-height-desktop: 70px;
    --logo-max-height-tablet: 50px;
    --logo-max-height-mobile: 40px;
    --menu-icon-size: 40px;
    --menu-icon-svg-size: 24px;

    /* --- Layout Elemente --- */
    /* Header */
    --header-bg-opacity: 0.9;
    /* Blauer Header Hintergrund */
    --header-bg-color-blue: rgba(
        var(--color-primary-blue-rgb),
        var(--header-bg-opacity)
    );
    /* Sandfarbener Header hintergrund */
    --header-bg-color-sand: rgba(
        var(--color-white-rgb),
        var(--header-bg-opacity)
    );

    --header-color: var(--color-black);
    --header-padding: var(--spacing-base);
    --header-padding-mobile: 10px 15px;
    --header-mobile-min-height: 80px;
    --header-mobile-padding: 15px 20px;

    /* Footer */
    --footer-bg-opacity: 0.9;
    --footer-bg-color-sand: rgba(
        var(--color-secondary-sand-rgb),
        var(--footer-bg-opacity)
    );
    --footer-bg-color-blue: var(--color-primary-blue);
    --footer-color: var(--color-black);
    --footer-color-blue: var(--color-white);
    --footer-padding: calc(2 * var(--spacing-base));
    --footer-padding-mobile: 15px 20px;
    --font-size-footer: 0.9rem;
    --font-size-footer-mobile: 0.85rem;
    --footer-gap-mobile: 8px;
    --footer-link-gap: 20px;

    /* Navigation Links */
    --nav-link-color: var(--header-color);
    --nav-link-hover-bg: var(--color-semi-transparent-white-90);
    --nav-link-active-bg: var(--nav-link-hover-bg);
    --nav-link-padding: var(--spacing-menu-padding);
    --nav-link-border-width: 2px;
    --nav-link-border-color: transparent;
    --nav-link-border-radius: var(--border-radius);
    --nav-link-min-width: 80px;
    --nav-link-gap: 20px;
    --nav-link-gap-mobile: 10px;
    --nav-links-container-bg: var(--color-semi-transparent-white-95);
    --nav-links-container-border-radius: var(--border-radius);
    --nav-links-container-padding: 10px;
    --nav-links-container-width: 200px;
    --nav-links-container-top-offset: 20px;

    /* Inhalt elemente */
    --section-min-height: 100vh;
    --section-top-padding: calc(155px + 5vh);
    --section-blue-bg: var(--color-primary-blue);
    --section-blue-color: var(--color-white);
    --section-sand-bg: var(--color-semi-transparent-white-90);
    --section-sand-color: var(--color-black);
    --section-dark-blue-bg: var(--color-dark-blue);
    --section-dark-blue-color: var(--color-white);
    --section-padding: var(--spacing-section-padding);
    --section-padding-mobile: var(--spacing-section-padding-mobile);
    --section-blue-content-padding-top: calc(
        25vh - var(--spacing-section-padding)
    );
    --section-dark-blue-content-padding: 70px 0;
    --section-dark-blue-content-padding-top: 70px;
    --section-dark-blue-content-padding-bottom: 50px;

    --content-bg: var(--color-semi-transparent-white-70);
    --content-color: var(--color-light-gray);
    --content-border-radius: var(--border-radius-large);
    --content-padding: var(--spacing-base);
    --content-padding-mobile: var(--spacing-small);
    --content-width: 80%;
    --content-max-width: 700px;
    --content-top: 15vh;
    --content-left: 5%;
    --h2-bg-section-font-size: 2.2rem;
    --h2-bg-section-margin-bottom: 1.2em;

    /* Hintergrundbilder */
    --bg-cranio-image: url("/images/Cranio-1200w.jpg");
    --bg-cranio-image-2x: url("/images/Cranio-2000w.jpg");
    --bg-praxisraum-image: url("/images/Praxisraum-1200w.jpg");
    --bg-praxisraum-image-2x: url("/images/Praxisraum-2000w.jpg");
    --bg-portrait-image: url("/images/Portrait-1200w.jpg");
    --bg-portrait-image-2x: url("/images/Portrait-2000w.jpg");

    /* Info Block (Kontakt/Preise) */
    --info-label-width: 30%;
    --info-content-width: 70%;
    --info-content-padding-left: 15px;
    --info-label-font-size: 1.1em;
    --info-content-font-size: 1.05em;
    --info-content-line-height: 1.7;
    --info-content-margin-bottom: 8px;
    --contact-price-margin: 25px 0;
    --contact-price-details-margin-top: var(--contact-price-margin);
    --contact-price-details-margin-bottom: 15px;
    --info-group-margin-bottom: 20px;

    --table-font-size: 14px;
    --table-padding: 8px;
    --table-first-col-width: 30%;
    --table-first-col-font-weight: normal;

    --large-paragraph-font-size: var(--font-size-large-paragraph);

    /* Logo */
    --logo-container-max-width-desktop: 60%;
    --logo-container-max-width-tablet: 70%;
    --logo-container-max-width-mobile: 65%;
    --logo-margin-right: 15px;

    --menu-icon-right: 15px;
    --nav-links-container-right: 15px;
    --menu-icon-right-mobile: 20px;
    --nav-links-container-right-mobile: var(--menu-icon-right-mobile);

    --background-section-padding: 120px 0 50px 0;

    --certification-logo-dimension: 80px;
}

@font-face {
    font-family: "Kozuka Mincho";
    src: url("Kozuka Mincho Pr6N M.otf") format("opentype");
    font-weight: normal;
    font-style: normal;
}

.background-section {
    min-height: var(--section-min-height);
    position: relative;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
    padding: var(--background-section-padding);
}

.background-section .content {
    position: fixed;
    top: 45%;
    left: 43%;
    background: rgba(255, 255, 255, 0);
    padding: 0;
    max-width: var(--spacing-content-max-width);
    width: 50%;
    border-radius: 0;
    color: var(--content-color);
    margin: 0 auto;
    transform: none;
}

.background-section-kontakt .content h2,
.background-section-preise .content h2 {
    font-size: var(--h2-bg-section-font-size);
    margin-bottom: var(--h2-bg-section-margin-bottom);
    text-align: left;
}

.background-section-kontakt::before {
    content: "";
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-image: -webkit-image-set(
        var(--bg-portrait-image) 1x,
        var(--bg-portrait-image-2x) 2x
    );
    background-image: image-set(
        var(--bg-portrait-image) 1x,
        var(--bg-portrait-image-2x) 2x
    );
    background-size: cover;
    background-position: center;
    background-attachment: fixed;
    z-index: -1;
}

.background-section-preise .content,
.background-section-kontakt .content {
    background: var(--content-bg);
    backdrop-filter: blur(2px);
    padding: var(--content-padding);
    width: var(--content-width);
    max-width: var(--content-max-width);
    min-width: auto;
    border-radius: var(--content-border-radius);
    color: var(--content-color);
    box-shadow: var(--box-shadow-standard);
    transform: none;
    max-height: none;
    overflow-y: visible;
}

.background-section-preise,
.background-section-kontakt {
    min-height: var(--section-min-height);
    background-size: cover;
    background-position: center;
    background-attachment: fixed;
    position: relative;
    padding: var(--background-section-padding);
    display: flex;
    align-items: center;
    padding-top: var(--section-top-padding);
    padding-left: var(--content-left);
}

.background-section-preise::before {
    content: "";
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-image: -webkit-image-set(
        var(--bg-praxisraum-image) 1x,
        var(--bg-praxisraum-image-2x) 2x
    );
    background-image: image-set(
        var(--bg-praxisraum-image) 1x,
        var(--bg-praxisraum-image-2x) 2x
    );
    background-size: cover;
    background-position: center;
    background-attachment: fixed;
    z-index: -1;
}

.background-section::before {
    content: "";
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-image: -webkit-image-set(
        var(--bg-cranio-image) 1x,
        var(--bg-cranio-image-2x) 2x
    );
    background-image: image-set(
        var(--bg-cranio-image) 1x,
        var(--bg-cranio-image-2x) 2x
    );
    background-size: cover;
    background-position: center;
    background-attachment: fixed;
    z-index: -1;
}

.certification-logo {
    max-height: var(--certification-logo-dimension);
    min-width: var(--certification-logo-dimension);
    width: auto;
    max-width: 100%;
    display: inline-block;
}

.contact-details p,
.price-details p {
    margin-bottom: var(--contact-price-details-margin-bottom);
}

.contact-details,
.price-details {
    margin-top: var(--contact-price-details-margin-top);
    font-size: var(--info-content-font-size);
    line-height: var(--info-content-line-height);
}

.contact-group .info-content {
    display: flex;
    flex-direction: column;
}

.contact-info,
.price-info,
.price-details {
    margin: var(--contact-price-margin);
}

.content {
    max-width: var(--spacing-content-max-width);
    margin: 0 auto;
}

.footer-company {
    text-align: left;
    width: 100%;
}

.footer-links {
    display: flex;
    gap: var(--footer-link-gap);
    list-style: none;
    margin: 0;
    padding: 0;
}

.footer-links a {
    text-decoration: none;
    color: inherit;
    transition: var(--transition-standard);
    display: inline;
}

.footer-links li {
    margin: 0;
    padding: 0;
}

.indented {
    padding-left: 20px;
}

.info-content {
    width: var(--info-content-width);
    padding-left: var(--info-content-padding-left);
    font-size: var(--info-content-font-size);
    line-height: var(--info-content-line-height);
}

.info-content p {
    margin-bottom: var(--info-content-margin-bottom);
}

.info-group {
    display: flex;
    margin-bottom: var(--info-group-margin-bottom);
    flex-wrap: wrap;
}

.info-label {
    width: var(--info-label-width);
    font-weight: var(--table-first-col-font-weight);
    flex-shrink: 0;
    font-size: var(--info-label-font-size);
}

.large-paragraph {
    font-size: var(--large-paragraph-font-size);
}

.logo {
    max-height: var(--logo-max-height-desktop);
    width: auto;
    max-width: 100%;
    margin-right: var(--logo-margin-right);
    object-fit: contain;
}

.logo-container {
    display: flex;
    align-items: center;
    max-width: var(--logo-container-max-width-desktop);
    overflow: hidden;
}

.logo-container-bottom {
    margin-top: 25px;
    text-align: center;
    padding: 15px 0;
    display: flex;
    gap: 2em;
    justify-content: center;
    flex-wrap: wrap;
}

.menu-icon {
    display: none;
    cursor: pointer;
    font-size: 24px;
}

.menu-toggle {
    display: none;
}

.no-scroll-page .content {
    margin: unset;
}

.scroll-page.blue footer {
    background-color: var(--footer-bg-color-blue);
    color: var(--footer-color-blue);
}

.scroll-page.blue header {
    background-color: var(--header-bg-color-blue);
}

.scroll-page.sand header {
    background-color: var(--header-bg-color-sand);
}

.no-scroll-page.index header {
    background-color: unset;
}

.section-blue {
    background-color: var(--section-blue-bg);
    color: var(--section-blue-color);
    padding: var(--section-padding);
    text-align: center;
    padding-top: var(--section-top-padding);
}

.section-blue .content,
.section-sand .content {
    position: relative;
    text-align: justify;
    max-width: var(--spacing-content-max-width);
    padding-top: var(--section-blue-content-padding-top);
}

.section-dark-blue {
    background-color: var(--section-dark-blue-bg);
    color: var(--section-dark-blue-color);
    padding: var(--section-padding);
    text-align: center;
}

.section-dark-blue .content {
    position: relative;
    text-align: justify;
    max-width: var(--spacing-content-max-width);
    padding: var(--section-dark-blue-content-padding);
}

.section-image {
    text-align: center;
    padding: 0;
    margin: 0;
}

.section-image img {
    display: block;
    max-width: 100%;
    height: auto;
    padding: 0;
    margin: 0;
}

.section-sand {
    background-color: var(--section-sand-bg);
    padding: var(--section-padding);
    text-align: center;
    min-height: var(--section-min-height);
    padding-top: var(--section-top-padding);
}

/* --- CSS Variablen --- */

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

a {
    color: inherit;
    text-decoration: underline;
}

b,
strong {
    font-weight: bolder;
}

body {
    font-family: var(--font-family-main);
    line-height: var(--line-height-base);
    font-size: var(--font-size-base);
}

footer {
    position: relative;
    width: 100%;
    padding: var(--footer-padding);
    background-color: var(--footer-bg-color-sand);
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: var(--font-size-footer);
    color: var(--footer-color);
}

h1 {
    font-size: var(--font-size-h1);
    line-height: var(--line-height-heading-h1);
}

h1,
h2,
h3,
h4,
h5,
h6 {
    font-family: var(--font-family-main);
    margin-bottom: 0.5em;
    font-weight: normal;
}

h2 {
    font-size: var(--font-size-h2);
    line-height: var(--line-height-heading-h2);
}

h3 {
    font-size: var(--font-size-h3);
    line-height: var(--line-height-heading-h3);
}

header {
    position: fixed;
    top: 0;
    width: 100%;
    z-index: 10;
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--header-padding);
    color: var(--header-color);
    background-color: var(--header-bg-color-sand);
}

nav .nav-links {
    list-style: none;
    display: flex;
    margin: 0;
    padding: 0;
    align-items: center;
    gap: var(--nav-link-gap);
}

nav .nav-links a {
    text-decoration: none;
    color: var(--nav-link-color);
    padding: var(--nav-link-padding);
    border: var(--nav-link-border-width) solid;
    border-color: var(--nav-link-border-color);
    transition: var(--transition-standard);
    display: inline-block;
    text-align: center;
    min-width: var(--nav-link-min-width);
    box-sizing: border-box;
}

nav .nav-links a:hover,
nav .nav-links a.active {
    background-color: var(--nav-link-hover-bg);
    border-radius: var(--nav-link-border-radius);
}

nav .nav-links li {
    margin: 0;
    padding: 0;
    display: flex;
    align-items: center;
}

nav .nav-links li:first-child {
    margin-left: 0;
}

p {
    font-family: var(--font-family-main);
    margin-bottom: 1em;
    line-height: var(--line-height-base);
}

table {
    width: 100%;
    border-collapse: collapse;
    border: none;
    margin: 20px 0;
}

td {
    padding: var(--table-padding);
    vertical-align: top;
    border: none;
}

td:first-child {
    width: var(--table-first-col-width);
    font-weight: var(--table-first-col-font-weight);
}

ul li,
ol li {
    margin-bottom: 0.5em;
}

ul,
ol {
    margin: 1em 0;
    padding-left: 1.5em;
}

@media (max-width: 480px) {
    .background-section .content {
        top: calc(80px + 5vh);
        left: 50%;
        transform: translateX(-50%);
        width: 90%;
        padding: 0;
        background: rgba(255, 255, 255, 0);
        border-radius: 0;
        text-align: center;
        max-height: calc(100vh - 80px - 5vh - 5vw);
        overflow-y: visible;
    }

    .background-section-preise .content,
    .background-section-kontakt .content {
        top: calc(80px + 5vh);
        width: 90%;
        padding: var(--content-padding-mobile);
        max-height: calc(100vh - 80px - 5vh - 5vw);
    }

    .logo {
        max-height: var(--logo-max-height-mobile);
    }

    .logo-container {
        max-width: var(--logo-container-max-width-mobile);
    }

    .menu-icon {
        right: var(--menu-icon-right);
    }

    .nav-links-container {
        right: var(--nav-links-container-right);
    }

    header {
        padding: var(--header-padding-mobile);
    }
}

@media (max-width: 1024px) {
    .background-section .content {
        position: absolute;
        top: 35%;
        left: 50%;
        transform: translateX(-50%);
        background: rgba(255, 255, 255, 0);
        padding: 0;
        max-width: 90%;
        width: auto;
        border-radius: 0;
        color: var(--content-color);
        text-align: center;
        margin: 0;
        max-height: calc(100vh - 80px - 5vh - 5vw);
        overflow-y: visible;
    }
}

@media (max-width: 768px) {
    .background-section {
        display: flex;
        align-items: center;
        justify-content: center;
    }

    .background-section .content {
        position: absolute;
        top: 45%;
        left: 50%;
        transform: translateX(-50%);
        background: rgba(255, 255, 255, 0);
        padding: 0;
        max-width: 90%;
        width: auto;
        border-radius: 0;
        color: var(--content-color);
        text-align: center;
        margin: 0;
        max-height: none;
    }

    .background-section-kontakt .content h2,
    .background-section-preise .content h2 {
        font-size: 1.9rem;
        margin-bottom: 1em;
        text-align: left;
    }

    .background-section-kontakt::before {
        background-position: 75% center;
        max-height: 100vh;
        height: 100vh;
    }

    .background-section-preise .content,
    .background-section-kontakt .content {
        top: calc(80px + 2vh);
        left: 5%;
        transform: none;
        max-height: none;
        width: 90%;
        padding: var(--content-padding-mobile);
        margin-bottom: 50px;
        position: unset;
        margin-left: 5%;
    }

    .background-section-preise,
    .background-section-kontakt {
        padding-left: unset;
    }

    .background-section-preise::before {
        max-height: 100vh;
        height: 100vh;
    }

    .background-section::before {
        background-position: 25% center;
        max-height: 100vh;
        height: 100vh;
    }

    .contact-details,
    .price-details {
        font-size: 1em;
        margin-top: 20px;
    }

    .contact-group .info-content {
        display: flex;
        flex-direction: column;
    }

    .contact-info,
    .price-info,
    .price-details {
        margin: 15px 0;
    }

    .content {
        max-width: 100%;
    }

    .footer-company {
        text-align: right;
        width: 100%;
    }

    .footer-links {
        justify-content: flex-end;
        width: 100%;
    }

    .info-content {
        width: 100%;
        padding-left: 0;
    }

    .info-content {
        font-size: 1em;
    }

    .info-group {
        flex-direction: column;
        margin-bottom: var(--info-group-margin-bottom);
    }

    .info-label {
        width: 100%;
        margin-bottom: 5px;
    }

    .info-label {
        font-size: 1.05em;
    }

    .large-paragraph {
        font-size: 20px;
    }

    .logo {
        max-height: var(--logo-max-height-tablet);
    }

    .logo-container {
        max-width: var(--logo-container-max-width-tablet);
    }

    .menu-icon {
        display: block;
        position: absolute;
        right: var(--menu-icon-right-mobile);
        top: 50%;
        transform: translateY(-50%);
        z-index: 20;
        background: var(--color-semi-transparent-white-80);
        width: var(--menu-icon-size);
        height: var(--menu-icon-size);
        display: flex;
        align-items: center;
        justify-content: center;
        border-radius: var(--border-radius);
        padding: 0;
        margin: 0;
        cursor: pointer;
    }

    .menu-icon svg {
        width: var(--menu-icon-svg-size);
        height: var(--menu-icon-svg-size);
        fill: var(--color-black);
    }

    .menu-toggle:checked ~ .nav-links-container {
        transform: translateY(0);
        opacity: 1;
        visibility: visible;
    }

    .nav-links {
        display: flex;
        flex-direction: column;
        width: 100%;
        list-style: none;
        margin: 0;
        padding: 0;
        gap: var(--nav-link-gap-mobile);
    }

    .nav-links a {
        text-decoration: none;
        color: var(--nav-link-color);
        padding: var(--nav-link-padding);
        border: var(--nav-link-border-width) solid;
        border-color: var(--nav-link-border-color);
        transition: var(--transition-standard);
        display: block;
        text-align: left;
        box-sizing: border-box;
        width: 100%;
    }

    .nav-links a:hover,
    .nav-links a.active {
        background-color: var(--nav-link-hover-bg);
        border-radius: var(--nav-link-border-radius);
    }

    .nav-links li {
        margin: 0;
        padding: 0;
        width: 100%;
        text-align: left;
    }

    .nav-links-container {
        position: absolute;
        top: calc(100% + var(--nav-links-container-top-offset));
        right: var(--nav-links-container-right-mobile);
        width: var(--nav-links-container-width);
        background-color: var(--nav-links-container-bg);
        z-index: 10;
        display: flex;
        flex-direction: column;
        padding: var(--nav-links-container-padding);
        border-radius: var(--nav-links-container-border-radius);
        transform: translateY(-20px);
        opacity: 0;
        visibility: hidden;
        transition: var(--transition-standard);
        box-shadow: var(--box-shadow-standard);
    }

    .no-scroll-page footer {
        background-color: var(--footer-bg-color-sand);
        color: var(--footer-color);
    }

    .no-scroll-page header {
        background-color: var(--header-bg-color-sand);
    }

    .section-blue .content,
    .section-sand .content {
        padding-top: calc(60px + 5vh);
    }

    .section-blue,
    .section-dark-blue {
        padding: var(--section-padding-mobile);
    }

    .section-dark-blue .content {
        padding-top: var(--section-dark-blue-content-padding-top);
        padding-bottom: var(--section-dark-blue-content-padding-bottom);
    }

    .section-sand {
        padding-top: unset;
    }

    body {
        font-size: 16px;
    }

    footer {
        padding: var(--footer-padding-mobile);
        min-height: var(--header-mobile-min-height);
        font-size: var(--font-size-footer-mobile);
        flex-direction: column;
        align-items: flex-end;
        gap: var(--footer-gap-mobile);
    }

    h1 {
        font-size: 2rem;
    }

    h2 {
        font-size: 1.7rem;
    }

    h3 {
        font-size: 1.3rem;
    }

    header {
        flex-direction: row;
        align-items: center;
        padding: var(--header-mobile-padding);
        min-height: var(--header-mobile-min-height);
    }

    table {
        font-size: var(--table-font-size);
    }

    td:first-child {
        width: 40%;
    }
}