/**
 * Art on Tour / SmartHomeConsulting - Globale CSS-Definitionen
 * Name: Arthur Peter Lorenzen
 * Adresse: Bachtelstrasse 68, 8342 Wernetshausen, Schweiz
 * E-Mail: info@art-on-tour.ch / info@smarthomeconsulting.ch
 * Web: www.art-on-tour.ch / www.smarthomeconsulting.ch
 */

/* ======================================= */
/*   1. ROOT VARIABLEN (DESIGN-SYSTEM)     */
/* ======================================= */

/* 1.1 Grundlegende Design-Variablen */
:root {
    /* 1.1.1 Primäre Farbpalette */
    --primary-color: #8b0000;
    --primary-color-hover: #a00000;
    --primary-color-light: rgba(139, 0, 0, 0.1);
    --primary-color-dark: #700000;

    /* 1.1.2 Sekundäre Farbpalette */
    --secondary-color: #666666;
    --secondary-color-hover: #777777;
    --secondary-color-light: #999999;
    --secondary-color-dark: #333333;

    /* 1.1.3 UI-Farbpalette */
    --background-color: #f5f5f5;
    --container-bg-color: #ffffff;
    --border-color: #dddddd;
    --border-color-light: #eeeeee;
    --text-color: #333333;
    --text-color-light: #666666;
    --text-color-lighter: #999999;
    --text-color-inverted: #ffffff;
    --success-color: #28a745;
    --error-color: #dc3545;
    --warning-color: #ffc107;
    --info-color: #17a2b8;

    /* 1.1.4 Typografie */
    --font-base: 'Helvetica Neue', Roboto, sans-serif;
    --font-secondary: 'Helvetica Neue', Arial, sans-serif;
    --font-size-base: 16px;
    --font-size-small: 14px;
    --font-size-smaller: 12px;
    --font-size-tiny: 10px;
    --font-size-large: 18px;
    --font-size-larger: 20px;
    --font-weight-normal: 400;
    --font-weight-bold: 600;
    --font-weight-bolder: 700;
    --line-height-base: 1.6;

    /* 1.1.5 Abstände */
    --spacing-xs: 5px;
    --spacing-sm: 10px;
    --spacing-md: 15px;
    --spacing-lg: 20px;
    --spacing-xl: 25px;
    --spacing-xxl: 30px;

    /* 1.1.6 Container */
    --container-width-max: 1200px;
    --container-padding: 25px;
    --container-padding-mobile: 15px;

    /* 1.1.7 Komponenten */
    --border-radius: 10px;
    --border-radius-small: 5px;
    --shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
    --shadow-sm: 0 2px 5px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 4px 15px rgba(0, 0, 0, 0.2);
    --transition-default: all 0.3s ease;

    /* 1.1.8 Layout-Dimensionen */
    --header-height: 70px;
    --header-height-mobile: 60px;
    --footer-base-height: 60px;
    --footer-padding-bottom: 0px;
    --footer-border-top: 3px;
    --footer-height: calc(var(--footer-base-height) + var(--footer-border-top));
    --footer-height-mobile: calc(var(--footer-base-height) - 5px + var(--footer-border-top));
    --header-height-landscape: 50px;
    --footer-height-landscape: 50px;

    /* 1.1.9 Z-Index-Schichten */
    --z-index-base: 1;
    --z-index-content: 10;
    --z-index-nav-toggle: 40;
    --z-index-side-menu-overlay: 90;
    --z-index-header: 100;
    --z-index-footer: 100;
    --z-index-side-menu: 110;
    --z-index-overlay: 150;
    --z-index-modal: 200;
    --z-index-toast: 300;
    --z-index-fullscreen: 9990;
    --z-index-offline-indicator: 9999;\n    \n    /* 1.1.10 Background Images */\n    --background-image-default: url('../images/background/background.jpg');
    
    /* 1.1.11 Safe Area Insets (für WebApp) */
    --safe-area-inset-top: env(safe-area-inset-top, 0px);
    --safe-area-inset-right: env(safe-area-inset-right, 0px);
    --safe-area-inset-bottom: env(safe-area-inset-bottom, 0px);
    --safe-area-inset-left: env(safe-area-inset-left, 0px);
}

/* ======================================= */
/*   2. RESET & GRUNDEINSTELLUNGEN         */
/* ======================================= */

/* 2.1 Box-Sizing und Margin/Padding-Reset */
*,
*::before,
*::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}
html, body {
    height: auto;
    overflow-x: hidden;
    overflow-y: auto;
}
/* 2.2 Grundstile für HTML und Body */
html {
    font-size: var(--font-size-base);
    scroll-behavior: smooth;
    height: 100%;
}

body {
    font-family: var(--font-base);
    line-height: var(--line-height-base);
    color: var(--text-color);
    background-color: var(--background-color);
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    /* Wichtig: Padding für fixed Header/Footer */
    padding-top: var(--header-height);
    padding-bottom: var(--footer-height);
}

/* 2.3 Hauptinhaltsbereich */
.main-content {
    flex-grow: 1;
    width: 100%;
    display: flex;
    flex-direction: column;
    background-color: var(--background-color);
}

/* 2.4 Container für den Inhalt */
.container {
    width: 100%;
    max-width: var(--container-width-max);
    margin: 0 auto;
    padding: var(--container-padding);
    background-color: var(--container-bg-color);
    box-shadow: var(--shadow);
    flex-grow: 1;
    display: flex;
    flex-direction: column;
}

/* ======================================= */
/*   3. HEADER                             */
/* ======================================= */
.header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    height: var(--header-height);
    background-color: var(--container-bg-color);
    box-shadow: var(--shadow);
    z-index: var(--z-index-header);
    display: flex;
    align-items: center;
    padding: 0 var(--container-padding);
}

.header-content {
    width: 100%;
    max-width: var(--container-width-max);
    margin: 0 auto;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

/* ======================================= */
/*   4. TYPOGRAFIE                         */
/* ======================================= */

/* 4.1 Überschriften */
h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-secondary);
    font-weight: var(--font-weight-bold);
    margin-bottom: 1rem;
    color: var(--text-color);
    line-height: 1.3;
}

h1 {
    font-size: 2.5rem;
    color: var(--primary-color);
}

h2 {
    font-size: 2rem;
}

h3 {
    font-size: 1.75rem;
}

h4 {
    font-size: 1.5rem;
}

h5 {
    font-size: 1.25rem;
}

h6 {
    font-size: 1rem;
}

/* 4.2 Absätze und Links */
p {
    margin-bottom: 1rem;
}

a {
    color: var(--primary-color);
    text-decoration: none;
    transition: color 0.3s ease;
}

a:hover {
    color: var(--primary-color-hover);
    text-decoration: underline;
}

/* 4.3 Abschnittstitel */
.section-title {
    font-size: 1.5rem;
    font-weight: var(--font-weight-bold);
    color: var(--text-color);
    margin: var(--spacing-xl) 0 var(--spacing-lg);
    padding-bottom: var(--spacing-sm);
    border-bottom: 1px solid var(--border-color-light);
    text-align: center;
}

/* ======================================= */
/*   5. BUTTONS & UI-ELEMENTE              */
/* ======================================= */

/* 5.1 Standard-Button */
.btn {
    display: inline-block;
    background-color: var(--primary-color);
    color: var(--text-color-inverted);
    padding: var(--spacing-sm) var(--spacing-lg);
    border-radius: var(--border-radius);
    text-decoration: none;
    border: none;
    cursor: pointer;
    font-weight: var(--font-weight-normal);
    text-align: center;
    transition: var(--transition-default);
    box-shadow: var(--shadow-sm);
    font-size: var(--font-size-base);
    line-height: 1.5;
}

/* 5.2 Button-Hover */
.btn:hover {
    background-color: var(--primary-color-hover);
    transform: translateY(-2px);
    box-shadow: var(--shadow);
    text-decoration: none;
    color: var(--text-color-inverted);
}

/* 5.3 Button-Active */
.btn:active {
    transform: translateY(0);
    box-shadow: var(--shadow-sm);
}

/* 5.4 Sekundärer Button */
.btn-secondary {
    background-color: var(--secondary-color);
    color: var(--text-color-inverted);
}

.btn-secondary:hover {
    background-color: var(--secondary-color-hover);
    color: var(--text-color-inverted);
}

/* 5.5 Kleine Buttons */
.btn-small {
    padding: var(--spacing-xs) var(--spacing-md);
    font-size: var(--font-size-small);
}

/* 5.6 Große Buttons */
.btn-large {
    padding: var(--spacing-md) var(--spacing-xl);
    font-size: var(--font-size-large);
}

/* 5.7 Icon-Button */
.icon-btn {
    background: none;
    border: 1px solid var(--primary-color);
    border-radius: var(--border-radius);
    width: 40px;
    height: 40px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: var(--transition-default);
    padding: 0;
    color: var(--primary-color);
}

/* 5.7.1 Icon innerhalb des Buttons */
.icon-btn svg {
    width: 20px;
    height: 20px;
    transition: var(--transition-default);
    stroke: currentColor;
    fill: none;
}

/* 5.7.2 Hover-Effekt für Icon-Buttons */
.icon-btn:hover {
    background-color: var(--primary-color-light);
    transform: translateY(-2px);
    color: var(--primary-color-hover);
}

/* 5.8 Formular-Elemente */
input[type="text"],
input[type="email"],
input[type="tel"],
input[type="password"],
input[type="number"],
input[type="date"],
textarea,
select {
    width: 100%;
    padding: var(--spacing-sm);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius-small);
    font-size: var(--font-size-base);
    line-height: var(--line-height-base);
    transition: border-color 0.3s ease, box-shadow 0.3s ease;
    background-color: #fff;
}

input:focus,
textarea:focus,
select:focus {
    border-color: var(--primary-color);
    outline: none;
    box-shadow: 0 0 0 3px var(--primary-color-light);
}

textarea {
    min-height: 100px;
    resize: vertical;
}

label {
    display: block;
    margin-bottom: var(--spacing-xs);
    font-weight: var(--font-weight-bold);
    color: var(--text-color);
    font-size: var(--font-size-small);
}

.form-group {
    margin-bottom: var(--spacing-lg);
}

/* ======================================= */
/*   6. FOOTER                             */
/* ======================================= */

.footer {
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    width: 100%;
    height: var(--footer-height);
    background-color: var(--container-bg-color);
    border-top: var(--footer-border-top) solid var(--primary-color);
    z-index: var(--z-index-footer);
    display: flex;
    justify-content: center;
    align-items: stretch;
    box-shadow: 0 -2px 10px rgba(0, 0, 0, 0.1);
    padding: 0;
    box-sizing: border-box;
}

.footer-menu {
    display: flex;
    justify-content: space-around;
    align-items: flex-start;
    width: 100%;
    max-width: var(--container-width-max);
    height: 100%;
    padding: 0 var(--spacing-sm);
    margin: 0 auto;
}

.footer-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: flex-start;
    flex: 1;
    max-width: 90px;
    text-decoration: none;
    padding: var(--spacing-xs) 0;
    margin: 0;
    text-align: center;
    cursor: pointer;
    transition: var(--transition-default);
    height: 100%;
    padding-top: 8px;
    box-sizing: border-box;
}

.footer-icon {
    width: 28px;
    height: 28px;
    color: var(--secondary-color-dark);
    display: flex;
    justify-content: center;
    align-items: center;
    margin-bottom: 5px;
    transition: color 0.2s ease, transform 0.2s ease;
}

.footer-icon svg {
    width: 100%;
    height: 100%;
    stroke-width: 1.5px;
    fill: none;
    stroke: currentColor;
}

.footer-label {
    font-size: 10px;
    font-family: var(--font-secondary);
    font-weight: var(--font-weight-normal);
    color: var(--secondary-color-dark);
    text-align: center;
    line-height: 1.2;
    width: 100%;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    transition: color 0.2s ease, font-weight 0.2s ease;
}

/* Aktives Element */
.footer-item.active .footer-icon,
.footer-item:hover .footer-icon {
    color: var(--primary-color);
}

.footer-item.active .footer-label,
.footer-item:hover .footer-label {
    color: var(--primary-color);
    font-weight: var(--font-weight-bold);
}

/* Hover-Effekt */
.footer-item:hover .footer-icon {
    transform: scale(1.1);
}

/* Aktives Element mit gefülltem Icon */
.footer-item.active .footer-icon.fill-active svg {
    fill: var(--primary-color);
    stroke: var(--container-bg-color);
}

/* ======================================= */
/*   7. SEITEN-LAYOUT-KOMPONENTEN          */
/* ======================================= */

/* 7.1 Detail-Seite */
.detail-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-xl);
}

/* 7.2 Panorama-Viewer */
#panorama {
    width: 100%;
    height: calc(100vh - var(--header-height) - var(--footer-height) - (2 * var(--spacing-lg)));
    margin: var(--spacing-lg) 0;
    background-color: #000;
    position: relative;
}

.main-content.panorama-full-height {
    padding: 0;
}

.main-content.panorama-full-height #panorama {
    height: calc(100vh - var(--header-height) - var(--footer-height));
    margin: 0;
}

/* 7.3 Floorplan-Container */
.floorplan-content {
    text-align: center;
}

.floorplan-image {
    max-width: 100%;
    height: auto;
    border: 1px solid var(--border-color);
    margin-top: var(--spacing-md);
}

/* 7.4 Kontakt-Seite */
.contact-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--spacing-xl);
}

/* ======================================= */
/*   8. RESPONSIVE ANPASSUNGEN             */
/* ======================================= */

/* 8.1 Tablet-Ansicht (bis 992px) */
@media (max-width: 992px) {
    :root {
        --container-padding: 20px;
    }

    h1 { font-size: 2.2rem; }
    h2 { font-size: 1.8rem; }
    .section-title { font-size: 1.4rem; }

    .detail-content { grid-template-columns: 1fr; }
    .contact-content { grid-template-columns: 1fr; }

    .footer-item { max-width: 80px; }
    .footer-icon { width: 26px; height: 26px; }
    
    body {
        padding-top: var(--header-height-mobile);
        padding-bottom: var(--footer-height-mobile);
    }
    
    .header { 
        height: var(--header-height-mobile); 
        padding: 0 var(--container-padding-mobile); 
    }
    
    .footer { 
        height: var(--footer-height-mobile); 
    }
    
    #panorama {
        height: calc(100vh - var(--header-height-mobile) - var(--footer-height-mobile) - (2 * var(--spacing-md)));
        margin: var(--spacing-md) 0;
    }
    
    .main-content.panorama-full-height #panorama {
        height: calc(100vh - var(--header-height-mobile) - var(--footer-height-mobile));
    }
}

/* 8.2 Mobile-Ansicht (bis 768px) */
@media (max-width: 768px) {
    :root {
        --header-height: var(--header-height-mobile);
        --footer-height: var(--footer-height-mobile);
        --container-padding: var(--container-padding-mobile);
        --spacing-lg: 15px;
        --spacing-xl: 20px;
        --font-size-base: 15px;
    }

    .container { padding: var(--container-padding-mobile); }

    h1 { font-size: 1.8rem; }
    h2 { font-size: 1.6rem; }
    h3 { font-size: 1.4rem; }
    .section-title { font-size: 1.3rem; margin: var(--spacing-lg) 0 var(--spacing-md); }

    .btn { padding: var(--spacing-sm) var(--spacing-md); font-size: 0.95rem; }

    /* Footer-Items kompakter */
    .footer-menu { padding: 0 var(--spacing-xs); }
    .footer-item { max-width: 70px; padding-top: 6px; }
    .footer-icon { width: 24px; height: 24px; margin-bottom: 4px; }
    .footer-label { font-size: 9px; }
}

/* 8.3 Kleine Mobile-Ansicht (bis 480px) */
@media (max-width: 480px) {
    :root {
        --border-radius: 8px;
        --border-radius-small: 4px;
        --font-size-base: 14px;
    }

    h1 { font-size: 1.6rem; }
    h2 { font-size: 1.4rem; }
    h3 { font-size: 1.3rem; }
    .section-title { font-size: 1.2rem; }

    .btn { padding: var(--spacing-xs) var(--spacing-sm); font-size: 0.9rem; }
    .icon-btn { width: 36px; height: 36px; }
    .icon-btn svg { width: 18px; height: 18px; }

    /* Footer noch kompakter */
    .footer-item { max-width: 60px; padding-top: 5px; }
    .footer-icon { width: 22px; height: 22px; }
    .footer-label { font-size: 8px; }
}

/* 8.4 Sehr kleine Mobile-Geräte (bis 375px) */
@media (max-width: 375px) {
    .footer-item { max-width: 55px; }
}

/* ======================================= */
/*   9. UTILITY-KLASSEN                    */
/* ======================================= */
/* Flexbox */
.d-flex { display: flex !important; }
.flex-column { flex-direction: column !important; }
.flex-row { flex-direction: row !important; }
.justify-start { justify-content: flex-start !important; }
.justify-end { justify-content: flex-end !important; }
.justify-center { justify-content: center !important; }
.justify-between { justify-content: space-between !important; }
.justify-around { justify-content: space-around !important; }
.align-start { align-items: flex-start !important; }
.align-end { align-items: flex-end !important; }
.align-center { align-items: center !important; }
.align-stretch { align-items: stretch !important; }
.flex-wrap { flex-wrap: wrap !important; }
.flex-nowrap { flex-wrap: nowrap !important; }
.flex-grow-1 { flex-grow: 1 !important; }
.flex-shrink-0 { flex-shrink: 0 !important; }

/* Spacing */
.m-0 { margin: 0 !important; }
.mt-0 { margin-top: 0 !important; }
.mb-0 { margin-bottom: 0 !important; }
.mt-auto { margin-top: auto !important; }
.mb-auto { margin-bottom: auto !important; }
.m-sm { margin: var(--spacing-sm) !important; }
.mt-sm { margin-top: var(--spacing-sm) !important; }
.mb-sm { margin-bottom: var(--spacing-sm) !important; }
.m-md { margin: var(--spacing-md) !important; }
.mt-md { margin-top: var(--spacing-md) !important; }
.mb-md { margin-bottom: var(--spacing-md) !important; }
.m-lg { margin: var(--spacing-lg) !important; }
.mt-lg { margin-top: var(--spacing-lg) !important; }
.mb-lg { margin-bottom: var(--spacing-lg) !important; }
.m-xl { margin: var(--spacing-xl) !important; }
.mt-xl { margin-top: var(--spacing-xl) !important; }
.mb-xl { margin-bottom: var(--spacing-xl) !important; }

.p-0 { padding: 0 !important; }
.p-sm { padding: var(--spacing-sm) !important; }
.pt-sm { padding-top: var(--spacing-sm) !important; }
.pb-sm { padding-bottom: var(--spacing-sm) !important; }
.p-md { padding: var(--spacing-md) !important; }
.pt-md { padding-top: var(--spacing-md) !important; }
.pb-md { padding-bottom: var(--spacing-md) !important; }
.p-lg { padding: var(--spacing-lg) !important; }
.pt-lg { padding-top: var(--spacing-lg) !important; }
.pb-lg { padding-bottom: var(--spacing-lg) !important; }
.p-xl { padding: var(--spacing-xl) !important; }
.pt-xl { padding-top: var(--spacing-xl) !important; }
.pb-xl { padding-bottom: var(--spacing-xl) !important; }

/* Text */
.text-center { text-align: center !important; }
.text-left { text-align: left !important; }
.text-right { text-align: right !important; }
.text-justify { text-align: justify !important; }
.text-primary { color: var(--primary-color) !important; }
.text-secondary { color: var(--secondary-color) !important; }
.text-light { color: var(--text-color-light) !important; }
.text-lighter { color: var(--text-color-lighter) !important; }
.text-white { color: var(--text-color-inverted) !important; }
.text-bold { font-weight: var(--font-weight-bold) !important; }
.text-normal { font-weight: var(--font-weight-normal) !important; }
.text-italic { font-style: italic !important; }
.text-uppercase { text-transform: uppercase !important; }
.text-nowrap { white-space: nowrap !important; }

/* Display & Visibility */
.d-none { display: none !important; }
.d-block { display: block !important; }
.d-inline { display: inline !important; }
.d-inline-block { display: inline-block !important; }
.invisible { visibility: hidden !important; }
.visible { visibility: visible !important; }

/* Position */
.position-relative { position: relative !important; }
.position-absolute { position: absolute !important; }
.position-fixed { position: fixed !important; }
.position-static { position: static !important; }

/* Overflow */
.overflow-hidden { overflow: hidden !important; }
.overflow-visible { overflow: visible !important; }
.overflow-scroll { overflow: scroll !important; }
.overflow-auto { overflow: auto !important; }

/* Width & Height */
.w-100 { width: 100% !important; }
.h-100 { height: 100% !important; }
.vh-100 { height: 100vh !important; }

/* ======================================= */
/*   10. ANIMATIONEN                       */
/* ======================================= */

/* 10.1 Fade-In */
@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}
.fade-in { animation: fadeIn 0.5s ease forwards; }

/* 10.2 Fade-In-Up */
@keyframes fadeInUp {
    from { opacity: 0; transform: translateY(20px); }
    to { opacity: 1; transform: translateY(0); }
}
.fade-in-up { animation: fadeInUp 0.6s ease forwards; }

/* 10.3 Fade-Out */
@keyframes fadeOut {
    from { opacity: 1; }
    to { opacity: 0; }
}
.fade-out { animation: fadeOut 0.5s ease forwards; }

/* 10.4 Pulse */
@keyframes pulse {
    0%, 100% { transform: scale(1); }
    50% { transform: scale(1.05); }
}
.pulse { animation: pulse 1.5s ease-in-out infinite; }

/* ======================================= */
/*   11. SPEZIELLE MODI                    */
/* ======================================= */

/* 11.1 Fullscreen-Modus */
body.fullscreen-active {
    overflow: hidden !important;
    background-color: #000 !important;
    padding-top: 0 !important;
    padding-bottom: 0 !important;
}

body.fullscreen-active .header,
body.fullscreen-active .footer,
body.fullscreen-active .side-menu,
body.fullscreen-active .rooms-overlay,
body.fullscreen-active .toggle-rooms-btn,
body.fullscreen-active .main-content:not(.fullscreen-content) {
    display: none !important;
}

body.fullscreen-active .main-content.fullscreen-content {
    flex-grow: 1;
    height: 100vh;
    padding: 0;
    margin: 0;
}
body.fullscreen-active #panorama {
    height: 100vh;
    margin: 0;
}

/* 11.2 WebApp-Modus (Basiseinstellungen) - Fortsetzung */
body.webapp-mode {
    overscroll-behavior-y: contain;
    -webkit-tap-highlight-color: rgba(0, 0, 0, 0);
    -webkit-user-select: none;
    user-select: none;
}

/* Fixierte Seite nur für Panorama-Ansicht im WebApp-Modus */
body.webapp-mode.page-panorama {
    position: fixed;
    width: 100%;
    height: 100%;
    overflow: hidden;
}

body.webapp-mode.page-panorama .main-content {
    height: calc(100% - var(--header-height) - var(--footer-height));
    overflow-y: auto;
    overflow-x: hidden;
    -webkit-overflow-scrolling: touch;
}

/* Inline-Scroll: Inhalt scrollt innerhalb fester Höhe (Header/Footer fix) */
/* Inline-Scroll (entfernt): Seiten-Scroll bleibt standardmäßig über Body/Main */

/* Mobile Anpassung für WebApp-Modus */
@media (max-width: 768px) {
    body.webapp-mode.page-panorama .main-content {
        height: calc(100% - var(--header-height-mobile) - var(--footer-height-mobile));
    }
}

/* 11.3 Offline-Modus */
.offline-indicator {
    position: fixed;
    top: 0;
    padding-top: env(safe-area-inset-top, 0px);
    left: 0;
    right: 0;
    padding: 10px;
    background-color: var(--error-color);
    color: var(--text-color-inverted);
    text-align: center;
    font-size: 14px;
    z-index: var(--z-index-offline-indicator);
    box-shadow: var(--shadow);
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.3s ease, visibility 0.3s ease;
    pointer-events: none;
}

body.offline-mode .offline-indicator {
    opacity: 1;
    visibility: visible;
}

body.offline-mode .requires-online {
    opacity: 0.5;
    pointer-events: none;
}

/* Verschiebt Header/Inhalt bei sichtbarem Offline-Indikator */
body.offline-mode .header {
    top: 40px;
}

body.offline-mode {
    padding-top: calc(var(--header-height) + 40px);
}

@media (max-width: 768px) {
    body.offline-mode {
        padding-top: calc(var(--header-height-mobile) + 40px);
    }
}

/* 11.4 iOS Safe Area Anpassungen */
@supports (padding-bottom: env(safe-area-inset-bottom)) {
    body {
        padding-bottom: calc(var(--footer-height) + env(safe-area-inset-bottom));
    }
    
    .footer {
        height: calc(var(--footer-height) + env(safe-area-inset-bottom));
        padding-bottom: env(safe-area-inset-bottom);
    }
    
    .side-menu {
        bottom: calc(var(--footer-height) + env(safe-area-inset-bottom));
    }

    @media (max-width: 768px) {
        body {
            padding-bottom: calc(var(--footer-height-mobile) + env(safe-area-inset-bottom));
        }
        
        .footer {
            height: calc(var(--footer-height-mobile) + env(safe-area-inset-bottom));
        }
        
        .side-menu {
            bottom: calc(var(--footer-height-mobile) + env(safe-area-inset-bottom));
        }
    }

    /* Landscape-Optimierungen */
    @media screen and (orientation: landscape) and (max-height: 500px) {
        body {
            padding-bottom: calc(var(--footer-height-landscape) + env(safe-area-inset-bottom));
        }
        
        .footer {
            height: calc(var(--footer-height-landscape) + env(safe-area-inset-bottom));
        }
        
        .side-menu {
            bottom: calc(var(--footer-height-landscape) + env(safe-area-inset-bottom));
        }

        @media (max-width: 768px) {
            body {
                padding-bottom: calc(var(--footer-height-landscape-mobile) + env(safe-area-inset-bottom));
            }
            
            .footer {
                height: calc(var(--footer-height-landscape-mobile) + env(safe-area-inset-bottom));
            }
            
            .side-menu {
                bottom: calc(var(--footer-height-landscape-mobile) + env(safe-area-inset-bottom));
            }
        }
    }
}

/* ======================================= */
/*   12. SIDE-MENU STYLES                  */
/* ======================================= */

/* 12.1 Seitenmenü Grundstil */
.side-menu {
    position: fixed;
    top: var(--header-height);
    bottom: var(--footer-height);
    right: 0;
    width: 280px;
    max-width: 80%;
    background-color: var(--container-bg-color);
    box-shadow: -3px 0 12px rgba(0, 0, 0, 0.15);
    z-index: var(--z-index-side-menu);
    transform: translateX(100%);
    transition: transform 0.35s cubic-bezier(0.25, 0.1, 0.25, 1);
    overflow-y: auto;
    overflow-x: hidden;
    display: flex;
    flex-direction: column;
    border-left: 1px solid var(--border-color-light);
}

/* 12.2 Aktives Seitenmenü */
.side-menu.active {
    transform: translateX(0);
}

/* 12.3 Seitenmenü-Header */
.side-menu-header {
    padding: var(--spacing-md) var(--spacing-lg);
    border-bottom: 1px solid var(--border-color-light);
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-shrink: 0;
}

/* 12.4 Seitenmenü-Titel */
.side-menu-title {
    font-size: var(--font-size-large);
    font-weight: var(--font-weight-bold);
    color: var(--text-color);
    margin: 0;
}

/* 12.5 Seitenmenü-Schließen-Button */
.side-menu-close {
    background: none;
    border: none;
    font-size: 24px;
    color: var(--primary-color);
    cursor: pointer;
    padding: var(--spacing-xs);
    line-height: 1;
    transition: color 0.2s ease, transform 0.2s ease;
}

.side-menu-close:hover {
    color: var(--primary-color-dark);
    transform: rotate(90deg);
}

/* 12.6 Seitenmenü-Inhalt */
.side-menu-content {
    flex-grow: 1;
    overflow-y: auto;
    padding: var(--spacing-sm) 0;
}

/* 12.7 Raum-Gruppe */
.room-group {
    margin-bottom: var(--spacing-md);
}

/* 12.8 Gruppen-Titel */
.group-title {
    padding: var(--spacing-xs) var(--spacing-lg);
    font-weight: var(--font-weight-bold);
    font-size: var(--font-size-small);
    color: var(--text-color-light);
    background-color: var(--background-color);
    text-transform: uppercase;
    letter-spacing: 0.5px;
    border-top: 1px solid var(--border-color-light);
    border-bottom: 1px solid var(--border-color-light);
    position: sticky;
    top: 0;
    z-index: 1;
}

.room-group:first-child .group-title {
    border-top: none;
}

/* 12.9 Raum-Item */
.room-item {
    padding: var(--spacing-sm) var(--spacing-lg);
    padding-left: 45px;
    display: flex;
    align-items: center;
    text-decoration: none;
    color: var(--text-color);
    position: relative;
    transition: background-color 0.2s ease, color 0.2s ease;
    font-size: var(--font-size-base);
    cursor: pointer;
}

/* 12.10 Raum-Item Hover */
.room-item:hover {
    background-color: var(--primary-color-light);
    color: var(--primary-color-dark);
}

.room-item:hover .room-icon {
    color: var(--primary-color-dark);
}

/* 12.11 Aktives Raum-Item */
.room-item.active {
    background-color: var(--primary-color-light);
    color: var(--primary-color);
    font-weight: var(--font-weight-bold);
}

.room-item.active .room-icon {
    color: var(--primary-color);
}

/* 12.12 Raum-Icon */
.room-icon {
    position: absolute;
    left: var(--spacing-lg);
    top: 50%;
    transform: translateY(-50%);
    width: 18px;
    height: 18px;
    color: var(--secondary-color);
    transition: color 0.2s ease;
}

/* 12.13 SVG im Raum-Icon */
.room-icon svg {
    width: 100%;
    height: 100%;
    fill: currentColor;
}

/* 12.14 Raum-Titel */
.room-title {
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    flex-grow: 1;
}

/* 12.15 Overlay für Seitenmenü */
.rooms-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: rgba(0, 0, 0, 0.4);
    z-index: var(--z-index-side-menu-overlay);
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.35s ease, visibility 0s 0.35s linear;
}

/* 12.16 Aktiver Overlay */
.rooms-overlay.active {
    opacity: 1;
    visibility: visible;
    transition: opacity 0.35s ease, visibility 0s 0s linear;
}

/* 12.17 Räume-Toggle-Button */
.toggle-rooms-btn {
    background: none;
    border: none;
    padding: var(--spacing-sm);
    color: var(--primary-color);
    cursor: pointer;
    z-index: var(--z-index-nav-toggle);
    transition: color 0.2s ease;
}

.toggle-rooms-btn:hover {
    color: var(--primary-color-dark);
}

.toggle-rooms-btn svg {
    width: 24px;
    height: 24px;
    stroke: currentColor;
    stroke-width: 2;
    fill: none;
}

/* 12.18 Mobile Anpassungen für Seitenmenü */
@media (max-width: 768px) {
    .side-menu {
        top: var(--header-height-mobile);
        bottom: var(--footer-height-mobile);
        width: 260px;
    }

    .side-menu-title { font-size: var(--font-size-large); }
    .side-menu-header { padding: var(--spacing-sm) var(--spacing-md); }
    .group-title { padding: var(--spacing-xs) var(--spacing-md); font-size: var(--font-size-smaller); }
    .room-item { padding: var(--spacing-sm) var(--spacing-md); padding-left: 40px; font-size: var(--font-size-small); }
    .room-icon { left: var(--spacing-md); width: 16px; height: 16px; }
    .toggle-rooms-btn svg { width: 22px; height: 22px; }
}

/* ======================================= */
/*   13. INSTALLATIONSHINWEISE (PWA)       */
/* ======================================= */

/* 13.1 Installation Banner */
.install-banner {
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    background-color: var(--container-bg-color);
    padding: 10px 15px;
    padding-left: calc(15px + var(--safe-area-inset-left));
    padding-right: calc(15px + var(--safe-area-inset-right));
    padding-bottom: calc(10px + var(--safe-area-inset-bottom));
    box-shadow: 0 -2px 10px rgba(0, 0, 0, 0.2);
    display: flex;
    align-items: center;
    justify-content: space-between;
    z-index: 9998;
    transform: translateY(100%);
    transition: transform 0.3s ease-out;
    visibility: hidden;
}

.install-banner.active {
    transform: translateY(0);
    visibility: visible;
}

.install-banner-text {
    flex-grow: 1;
    font-size: 14px;
    padding-right: 15px;
    color: var(--text-color);
}

.install-banner-close {
    background: none;
    border: none;
    color: #999;
    font-size: 20px;
    padding: 5px;
    cursor: pointer;
    flex-shrink: 0;
}

.install-banner-btn {
    background-color: var(--primary-color);
    color: var(--text-color-inverted);
    border: none;
    padding: 8px 15px;
    border-radius: var(--border-radius-small);
    font-weight: bold;
    cursor: pointer;
    margin-left: 10px;
    flex-shrink: 0;
    white-space: nowrap;
}

/* 13.2 iOS Installation Hint */
.install-hint {
    position: fixed;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    background-color: white;
    border-radius: 12px;
    box-shadow: 0 5px 25px rgba(0, 0, 0, 0.2);
    z-index: 10000;
    max-width: 320px;
    width: 90%;
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.3s, visibility 0s 0.3s linear;
}

.install-hint.visible {
    opacity: 1;
    visibility: visible;
    transition: opacity 0.3s, visibility 0s 0s linear;
}

.install-hint-content {
    padding: 20px;
    text-align: center;
}

.install-hint-content h3 {
    margin-top: 0;
    margin-bottom: 15px;
    font-size: 18px;
    color: var(--text-color);
}

.install-hint-content p {
    margin-bottom: 20px;
    font-size: 14px;
    line-height: 1.5;
    color: var(--text-color-light);
}

.install-hint-content .btn {
    width: 100%;
    margin-top: 10px;
}

/* 13.3 Share-Icon für iOS-Installationshinweis */
.share-icon {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 24px;
    height: 24px;
    vertical-align: middle;
    margin: 0 2px;
}

.share-icon svg {
    width: 18px;
    height: 18px;
    fill: var(--primary-color);
}

/* 13.4 Android Installation Button */
.android-install-button {
    position: fixed;
    top: calc(var(--header-height) + var(--safe-area-inset-top) + 15px);
    right: calc(15px + var(--safe-area-inset-right));
    background-color: var(--primary-color);
    color: var(--text-color-inverted);
    border: none;
    padding: 8px 12px;
    border-radius: 50px;
    font-size: 14px;
    font-weight: 500;
    display: none;
    align-items: center;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.2);
    z-index: 9000;
    cursor: pointer;
    transition: transform 0.2s ease;
}

.android-install-button:hover {
    transform: scale(1.05);
}

.android-install-button.visible {
    display: flex;
}

.android-install-button .button-icon {
    margin-right: 5px;
    display: flex;
    align-items: center;
}

.android-install-button .button-icon svg {
    width: 16px;
    height: 16px;
    fill: currentColor;
}

/* 13.5 Installationserfolg-Meldung */
.install-success-message {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: rgba(0, 0, 0, 0.7);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 10000;
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.3s, visibility 0s 0.3s linear;
}

.install-success-message.visible {
    opacity: 1;
    visibility: visible;
    transition: opacity 0.3s, visibility 0s 0s linear;
}

.success-content {
    background-color: white;
    border-radius: 12px;
    padding: 25px;
    max-width: 300px;
    width: 90%;
    text-align: center;
}

.success-content h3 {
    margin-top: 0;
    color: var(--success-color);
    font-size: 18px;
}

.success-content p {
    margin-bottom: 20px;
    font-size: 14px;
    line-height: 1.5;
    color: var(--text-color);
}

.success-content .btn {
    width: 100%;
    background-color: var(--success-color);
}