/* Biegeform 2025 - Modern Design System */

/* CSS Reset & Base */
*,
*::before,
*::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

/* Design Tokens */
:root {
    /* Colors - Modernized Palette */
    --color-primary: #c41e3a;        /* Biegeform Rot - weniger dominant */
    --color-primary-light: #e23856;   /* Lighter red */
    --color-primary-dark: #9a1829;    /* Darker red */

    --color-secondary: #0ea5e9;       /* Modern Cyan (inspired by Kämper) */
    --color-secondary-light: #38bdf8;
    --color-secondary-dark: #0284c7;

    --color-accent: #059669;          /* Success Green */
    --color-warning: #f59e0b;         /* Warning Orange */
    --color-error: #dc2626;           /* Error Red */

    /* Neutrals - Professional Gray Scale */
    --color-neutral-50: #f8fafc;
    --color-neutral-100: #f1f5f9;
    --color-neutral-200: #e2e8f0;
    --color-neutral-300: #cbd5e1;
    --color-neutral-400: #94a3b8;
    --color-neutral-500: #64748b;
    --color-neutral-600: #475569;
    --color-neutral-700: #334155;
    --color-neutral-800: #1e293b;
    --color-neutral-900: #0f172a;

    /* Semantic Colors */
    --color-background: #ffffff;
    --color-surface: var(--color-neutral-50);
    --color-text-primary: var(--color-neutral-900);
    --color-text-secondary: var(--color-neutral-600);
    --color-text-muted: var(--color-neutral-500);
    --color-border: var(--color-neutral-200);
    --color-border-light: var(--color-neutral-100);

    /* Spacing Scale */
    --space-1: 0.25rem;   /* 4px */
    --space-2: 0.5rem;    /* 8px */
    --space-3: 0.75rem;   /* 12px */
    --space-4: 1rem;      /* 16px */
    --space-5: 1.25rem;   /* 20px */
    --space-6: 1.5rem;    /* 24px */
    --space-8: 2rem;      /* 32px */
    --space-10: 2.5rem;   /* 40px */
    --space-12: 3rem;     /* 48px */
    --space-16: 4rem;     /* 64px */
    --space-20: 5rem;     /* 80px */
    --space-24: 6rem;     /* 96px */
    --space-32: 8rem;     /* 128px */

    /* Border Radius */
    --radius-none: 0;
    --radius-sm: 0.25rem;
    --radius-base: 0.5rem;
    --radius-lg: 0.75rem;
    --radius-xl: 1rem;
    --radius-2xl: 1.5rem;
    --radius-full: 9999px;

    /* Shadows */
    --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.05);
    --shadow-base: 0 1px 3px 0 rgb(0 0 0 / 0.1), 0 1px 2px -1px rgb(0 0 0 / 0.1);
    --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.1), 0 2px 4px -2px rgb(0 0 0 / 0.1);
    --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.1), 0 4px 6px -4px rgb(0 0 0 / 0.1);
    --shadow-xl: 0 20px 25px -5px rgb(0 0 0 / 0.1), 0 8px 10px -6px rgb(0 0 0 / 0.1);
    --shadow-2xl: 0 25px 50px -12px rgb(0 0 0 / 0.25);

    /* Transitions */
    --transition-fast: 150ms ease-in-out;
    --transition-base: 250ms ease-in-out;
    --transition-slow: 350ms ease-in-out;

    /* Z-Index Scale */
    --z-dropdown: 1000;
    --z-sticky: 1020;
    --z-fixed: 1030;
    --z-modal-backdrop: 1040;
    --z-modal: 1050;
    --z-popover: 1060;
    --z-tooltip: 1070;
    --z-toast: 1080;
}

/* Dark Mode Support */
@media (prefers-color-scheme: dark) {
    :root {
        --color-background: var(--color-neutral-900);
        --color-surface: var(--color-neutral-800);
        --color-text-primary: var(--color-neutral-50);
        --color-text-secondary: var(--color-neutral-300);
        --color-text-muted: var(--color-neutral-400);
        --color-border: var(--color-neutral-700);
        --color-border-light: var(--color-neutral-800);
    }
}

/* High Contrast Mode */
.high-contrast {
    --color-background: #000000;
    --color-text-primary: #ffffff;
    --color-text-secondary: #ffffff;
    --color-primary: #ffff00;
    --color-secondary: #00ffff;
    --color-border: #ffffff;
}

/* Base Styles */
html {
    scroll-behavior: smooth;
}

body {
    background-color: var(--color-background);
    color: var(--color-text-primary);
    transition: background-color var(--transition-base), color var(--transition-base);
}

/* Layout */
.container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--space-4);
}

@media (min-width: 768px) {
    .container {
        padding: 0 var(--space-6);
    }
}

@media (min-width: 1024px) {
    .container {
        padding: 0 var(--space-8);
    }
}

.section {
    padding: var(--space-20) 0;
}

@media (max-width: 768px) {
    .section {
        padding: var(--space-16) 0;
    }
}

/* Skip Link für Barrierefreiheit */
.skip-link {
    position: absolute;
    top: -40px;
    left: 6px;
    background: var(--color-primary);
    color: white;
    padding: 8px;
    text-decoration: none;
    border-radius: var(--radius-base);
    z-index: var(--z-toast);
    transition: top var(--transition-fast);
}

.skip-link:focus {
    top: 6px;
}

/* Accessibility Tools */
.accessibility-tools {
    position: fixed;
    top: 50%;
    right: var(--space-4);
    transform: translateY(-50%);
    display: flex;
    flex-direction: column;
    gap: var(--space-2);
    z-index: var(--z-tooltip);
}

.accessibility-btn {
    width: 40px;
    height: 40px;
    border: none;
    border-radius: var(--radius-full);
    background: var(--color-neutral-800);
    color: white;
    font-size: var(--text-sm);
    cursor: pointer;
    transition: all var(--transition-fast);
    display: flex;
    align-items: center;
    justify-content: center;
}

.accessibility-btn:hover {
    background: var(--color-neutral-700);
    transform: scale(1.1);
}

.accessibility-btn:focus {
    outline: 2px solid var(--color-secondary);
    outline-offset: 2px;
}

/* Language Switcher */
.language-switcher {
    position: fixed;
    top: var(--space-4);
    right: var(--space-4);
    z-index: var(--z-dropdown);
}

.lang-btn {
    display: flex;
    align-items: center;
    gap: var(--space-2);
    padding: var(--space-2) var(--space-3);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-base);
    background: var(--color-background);
    color: var(--color-text-primary);
    font-size: var(--text-sm);
    cursor: pointer;
    transition: all var(--transition-fast);
}

.lang-btn:hover {
    border-color: var(--color-secondary);
    box-shadow: var(--shadow-sm);
}

.lang-menu {
    position: absolute;
    top: 100%;
    right: 0;
    margin-top: var(--space-1);
    background: var(--color-background);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-base);
    box-shadow: var(--shadow-lg);
    opacity: 0;
    visibility: hidden;
    transform: translateY(-8px);
    transition: all var(--transition-fast);
    min-width: 120px;
}

.lang-btn[aria-expanded="true"] + .lang-menu {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.lang-option {
    display: block;
    padding: var(--space-3) var(--space-4);
    color: var(--color-text-primary);
    text-decoration: none;
    font-size: var(--text-sm);
    border-bottom: 1px solid var(--color-border-light);
    transition: background-color var(--transition-fast);
}

.lang-option:last-child {
    border-bottom: none;
}

.lang-option:hover {
    background: var(--color-surface);
}

.lang-option.active {
    background: var(--color-secondary);
    color: white;
}

/* Cookie Banner */
.cookie-banner {
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    background: var(--color-background);
    border-top: 1px solid var(--color-border);
    box-shadow: var(--shadow-xl);
    z-index: var(--z-modal);
    transform: translateY(100%);
    transition: transform var(--transition-base);
}

.cookie-banner.show {
    transform: translateY(0);
}

.cookie-content {
    max-width: 1200px;
    margin: 0 auto;
    padding: var(--space-6);
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: var(--space-6);
}

.cookie-text h3 {
    font-size: var(--text-lg);
    margin-bottom: var(--space-2);
    color: var(--color-text-primary);
}

.cookie-text p {
    color: var(--color-text-secondary);
    font-size: var(--text-sm);
    line-height: var(--leading-relaxed);
}

.cookie-actions {
    display: flex;
    gap: var(--space-3);
    flex-shrink: 0;
}

@media (max-width: 768px) {
    .cookie-content {
        flex-direction: column;
        align-items: stretch;
        text-align: center;
    }

    .cookie-actions {
        flex-direction: column;
    }
}

/* Header */
.header {
    background: var(--color-background);
    border-bottom: 1px solid var(--color-border-light);
    position: sticky;
    top: 0;
    z-index: var(--z-sticky);
    backdrop-filter: blur(8px);
    background: rgba(255, 255, 255, 0.95);
}

.header-content {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--space-4) 0;
}

.logo {
    display: flex;
    align-items: center;
}

.logo a {
    display: flex;
    align-items: center;
    gap: var(--space-3);
    text-decoration: none;
    color: var(--color-text-primary);
}

.logo img {
    height: 50px;
    width: auto;
}

.logo-text {
    display: flex;
    flex-direction: column;
}

.logo-main {
    font-family: var(--font-display);
    font-size: var(--text-2xl);
    font-weight: var(--font-bold);
    color: var(--color-primary);
    line-height: 1;
}

.logo-sub {
    font-size: var(--text-sm);
    color: var(--color-text-secondary);
    line-height: 1;
}

.header-contact {
    display: flex;
    gap: var(--space-6);
}

.contact-item {
    display: flex;
    align-items: center;
    gap: var(--space-2);
}

.contact-item a {
    color: var(--color-text-secondary);
    text-decoration: none;
    font-size: var(--text-sm);
    font-weight: var(--font-medium);
    transition: color var(--transition-fast);
}

.contact-item a:hover {
    color: var(--color-primary);
}

/* Mobile Menu Toggle */
.mobile-menu-toggle {
    display: none;
    flex-direction: column;
    gap: 4px;
    background: none;
    border: none;
    cursor: pointer;
    padding: var(--space-2);
}

.hamburger-line {
    width: 24px;
    height: 2px;
    background: var(--color-text-primary);
    transition: all var(--transition-fast);
}

.mobile-menu-toggle[aria-expanded="true"] .hamburger-line:nth-child(1) {
    transform: rotate(45deg) translate(6px, 6px);
}

.mobile-menu-toggle[aria-expanded="true"] .hamburger-line:nth-child(2) {
    opacity: 0;
}

.mobile-menu-toggle[aria-expanded="true"] .hamburger-line:nth-child(3) {
    transform: rotate(-45deg) translate(6px, -6px);
}

@media (max-width: 768px) {
    .header-contact {
        display: none;
    }

    .mobile-menu-toggle {
        display: flex;
    }

    .logo-text {
        display: none;
    }
}

/* Navigation */
.main-nav {
    background: var(--color-background);
    border-bottom: 1px solid var(--color-border-light);
}

.nav-list {
    display: flex;
    align-items: center;
    list-style: none;
    gap: var(--space-2);
}

.nav-item {
    position: relative;
}

.nav-link {
    display: flex;
    align-items: center;
    gap: var(--space-1);
    padding: var(--space-4) var(--space-4);
    color: var(--color-text-primary);
    text-decoration: none;
    font-weight: var(--font-medium);
    font-size: var(--text-sm);
    border-radius: var(--radius-base);
    transition: all var(--transition-fast);
}

.nav-link:hover,
.nav-link.active {
    color: var(--color-primary);
    background: var(--color-surface);
}

.nav-dropdown .dropdown-menu {
    position: absolute;
    top: 100%;
    left: 0;
    background: var(--color-background);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-lg);
    min-width: 200px;
    opacity: 0;
    visibility: hidden;
    transform: translateY(-8px);
    transition: all var(--transition-fast);
    z-index: var(--z-dropdown);
    list-style: none;
    padding: var(--space-2);
}

.nav-dropdown:hover .dropdown-menu {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.dropdown-menu li {
    margin: 0;
}

.dropdown-menu a {
    display: block;
    padding: var(--space-3) var(--space-4);
    color: var(--color-text-primary);
    text-decoration: none;
    font-size: var(--text-sm);
    border-radius: var(--radius-base);
    transition: all var(--transition-fast);
}

.dropdown-menu a:hover {
    background: var(--color-surface);
    color: var(--color-primary);
}

.nav-cta {
    margin-left: auto;
}

@media (max-width: 768px) {
    .main-nav {
        display: none;
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        background: var(--color-background);
        border-top: 1px solid var(--color-border);
        box-shadow: var(--shadow-lg);
    }

    .main-nav.show {
        display: block;
    }

    .nav-list {
        flex-direction: column;
        align-items: stretch;
        padding: var(--space-4);
    }

    .nav-dropdown .dropdown-menu {
        position: static;
        opacity: 1;
        visibility: visible;
        transform: none;
        box-shadow: none;
        border: none;
        margin-left: var(--space-4);
    }
}

/* SR-Only utility */
.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
}