/* ==========================================
   Main Styles - KI-Prozessnavigator
   ========================================== */

/* ===== Base Styles ===== */
body {
    font-family: var(--font-body);
    font-size: var(--text-base);
    font-weight: var(--font-regular);
    color: var(--color-text);
    background-color: var(--color-background);
    line-height: var(--leading-normal);
}

/* ===== Layout ===== */
.container {
    width: 100%;
    max-width: var(--container-max);
    margin-inline: auto;
    padding-inline: var(--container-padding);
}

/* ===== Typography ===== */
h1, h2, h3, h4 {
    font-family: var(--font-heading);
    font-weight: var(--font-regular);
    line-height: var(--leading-tight);
    color: var(--color-neutral-900);
    transition: color var(--transition-base);
}

h1 em, h2 em {
    font-style: italic;
    background: linear-gradient(135deg, var(--color-neon) 0%, var(--color-primary) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

/* ===== Header & Navigation ===== */
.header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    z-index: var(--z-fixed);
    background: rgba(254, 253, 251, 0.9);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-bottom: 1px solid transparent;
    transition: border-color var(--transition-base), box-shadow var(--transition-base);
}

.header.scrolled {
    border-bottom-color: rgba(0, 240, 255, 0.2);
    box-shadow: 0 2px 20px rgba(0, 240, 255, 0.1), var(--shadow-sm);
    background: rgba(254, 253, 251, 0.95);
}

.nav {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 100px;
}

.nav__logo {
    display: flex;
    align-items: center;
    gap: 0;
    padding-left: 0;
    margin-left: 0;
}

.nav__logo img {
    display: block;
    height: 80px;
    width: auto;
    image-rendering: -webkit-optimize-contrast;
    image-rendering: crisp-edges;
}

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

.logo-icon img {
    display: block;
}

.logo-text {
    font-family: var(--font-heading);
    font-size: 1.4rem;
    color: #ffffff;
    letter-spacing: var(--tracking-tight);
    font-weight: var(--font-semibold);
    margin-left: 0;
}

.nav__menu {
    display: flex;
    align-items: center;
    gap: var(--space-8);
    margin-left: auto;
}

.nav__actions {
    display: none;
}

/* Entferne alle Hover-Effekte von den List Items */
.nav__item {
    background: none !important;
    background-color: transparent !important;
    backdrop-filter: none !important;
    -webkit-backdrop-filter: none !important;
    padding: 0 !important;
    margin: 0 !important;
}

.nav__item:hover,
.nav__item:focus,
.nav__item:active {
    background: none !important;
    background-color: transparent !important;
    backdrop-filter: none !important;
    -webkit-backdrop-filter: none !important;
}

.nav__link {
    font-size: var(--text-sm);
    font-weight: var(--font-medium);
    color: var(--color-neutral-600);
    transition: color 0.2s ease;
    position: relative;
    display: inline-block;
    background: none !important;
    background-color: transparent !important;
    backdrop-filter: none !important;
    -webkit-backdrop-filter: none !important;
    padding: 0 !important;
    margin: 0 !important;
}

.nav__link::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    right: 0;
    width: 0;
    height: 2px;
    background: var(--color-primary);
    transition: width 0.3s ease;
}

.nav__link:hover,
.nav__link:focus,
.nav__link:active,
.nav__link.active {
    color: var(--color-primary);
    background: none !important;
    background-color: transparent !important;
    backdrop-filter: none !important;
    -webkit-backdrop-filter: none !important;
}

.nav__link:hover::after,
.nav__link.active::after {
    width: 100%;
}

.nav__link--cta {
    padding: var(--space-2) var(--space-5) !important;
    background: var(--gradient-neon-1) !important;
    background-color: transparent !important;
    color: white !important;
    border-radius: var(--radius-full);
    transition: transform var(--transition-fast), box-shadow var(--transition-fast), filter var(--transition-fast);
    box-shadow: 0 0 15px rgba(0, 119, 255, 0.3);
    position: relative;
    overflow: hidden;
    backdrop-filter: none !important;
    -webkit-backdrop-filter: none !important;
}

.nav__link--cta::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.3), transparent);
    transition: left 0.5s ease;
}

.nav__link--cta:hover::before {
    left: 100%;
}

.nav__link--cta::after {
    display: none;
}

.nav__link--cta:hover,
.nav__link--cta:focus,
.nav__link--cta:active {
    transform: translateY(-2px);
    box-shadow: 0 0 25px rgba(0, 119, 255, 0.5);
    filter: brightness(1.1);
    background: var(--gradient-neon-1) !important;
    background-color: transparent !important;
    backdrop-filter: none !important;
    -webkit-backdrop-filter: none !important;
}

.nav__toggle {
    display: none;
    width: 32px;
    height: 32px;
    position: relative;
}

.hamburger,
.hamburger::before,
.hamburger::after {
    width: 24px;
    height: 2px;
    background: var(--color-neutral-800);
    border-radius: 2px;
    position: absolute;
    left: 50%;
    transform: translateX(-50%);
    transition: var(--transition-fast);
}

.hamburger {
    top: 50%;
    transform: translate(-50%, -50%);
}

.hamburger::before,
.hamburger::after {
    content: '';
}

.hamburger::before {
    top: -7px;
}

.hamburger::after {
    top: 7px;
}

/* ===== Theme Toggle Button ===== */
.theme-toggle {
    width: 44px;
    height: 44px;
    border-radius: var(--radius-full);
    border: 2px solid var(--color-border);
    background: var(--color-surface);
    color: var(--color-text);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all var(--transition-fast);
    position: relative;
    overflow: hidden;
}

.theme-toggle:hover {
    background: var(--gradient-neon-1);
    border-color: transparent;
    color: white;
    box-shadow: var(--shadow-neon-cyan);
    transform: scale(1.05);
}

.theme-toggle__icon {
    position: absolute;
    transition: opacity var(--transition-base), transform var(--transition-base);
}

.theme-toggle__icon--sun {
    opacity: 1;
    transform: rotate(0deg);
}

.theme-toggle__icon--moon {
    opacity: 0;
    transform: rotate(90deg);
}

[data-theme="dark"] .theme-toggle__icon--sun {
    opacity: 0;
    transform: rotate(90deg);
}

[data-theme="dark"] .theme-toggle__icon--moon {
    opacity: 1;
    transform: rotate(0deg);
}

/* ===== Buttons ===== */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-2);
    padding: var(--space-4) var(--space-8);
    font-size: var(--text-sm);
    font-weight: var(--font-semibold);
    border-radius: var(--radius-full);
    transition: all var(--transition-fast);
    cursor: pointer;
    white-space: nowrap;
}

.btn--primary {
    background: var(--gradient-neon-1);
    color: white;
    box-shadow: var(--shadow-neon-green);
    position: relative;
    overflow: hidden;
}

.btn--primary::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.3), transparent);
    transition: left 0.5s ease;
}

.btn--primary:hover::before {
    left: 100%;
}

.btn--primary:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-neon-multi);
    filter: brightness(1.1);
}

.btn--secondary {
    background: transparent;
    color: var(--color-primary);
    border: 2px solid var(--color-primary-200);
}

.btn--secondary:hover {
    background: var(--color-primary-50);
    border-color: var(--color-primary);
}

.btn--full {
    width: 100%;
}

/* ===== Section Styles ===== */
section {
    padding-block: var(--section-padding);
}

.section__header {
    text-align: center;
    max-width: 700px;
    margin-inline: auto;
    margin-bottom: var(--space-16);
}

.section__tag {
    display: inline-block;
    font-size: var(--text-xs);
    font-weight: var(--font-semibold);
    text-transform: uppercase;
    letter-spacing: var(--tracking-wider);
    color: var(--color-primary);
    margin-bottom: var(--space-4);
}

.section__title {
    font-size: var(--text-3xl);
    margin-bottom: var(--space-4);
}

.section__description {
    font-size: var(--text-lg);
    color: var(--color-text-muted);
}

/* ===== Hero Section ===== */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    padding-top: 40px;
    background: 
        radial-gradient(ellipse 80% 50% at 50% -20%, rgba(0, 119, 255, 0.12), transparent),
        radial-gradient(ellipse 60% 40% at 90% 80%, rgba(0, 212, 255, 0.1), transparent),
        radial-gradient(ellipse 40% 30% at 10% 60%, rgba(0, 153, 255, 0.08), transparent),
        radial-gradient(ellipse 50% 35% at 50% 50%, rgba(0, 85, 204, 0.06), transparent),
        var(--color-background);
    overflow: hidden;
    position: relative;
    animation: heroGradientShift 15s ease-in-out infinite;
}

@keyframes heroGradientShift {
    0%, 100% {
        background: 
            radial-gradient(ellipse 80% 50% at 50% -20%, rgba(0, 119, 255, 0.12), transparent),
            radial-gradient(ellipse 60% 40% at 90% 80%, rgba(0, 212, 255, 0.1), transparent),
            radial-gradient(ellipse 40% 30% at 10% 60%, rgba(0, 153, 255, 0.08), transparent),
            radial-gradient(ellipse 50% 35% at 50% 50%, rgba(0, 85, 204, 0.06), transparent),
            var(--color-background);
    }
    50% {
        background: 
            radial-gradient(ellipse 80% 50% at 50% -20%, rgba(0, 212, 255, 0.12), transparent),
            radial-gradient(ellipse 60% 40% at 90% 80%, rgba(0, 153, 255, 0.1), transparent),
            radial-gradient(ellipse 40% 30% at 10% 60%, rgba(0, 119, 255, 0.08), transparent),
            radial-gradient(ellipse 50% 35% at 50% 50%, rgba(0, 191, 255, 0.06), transparent),
            var(--color-background);
    }
}

.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-image: 
        linear-gradient(to right, rgba(0, 119, 255, 0.08) 1px, transparent 1px),
        linear-gradient(to bottom, rgba(0, 212, 255, 0.08) 1px, transparent 1px),
        linear-gradient(45deg, rgba(0, 153, 255, 0.03) 1px, transparent 1px);
    background-size: 60px 60px, 60px 60px, 120px 120px;
    opacity: 0.6;
    mask-image: radial-gradient(ellipse 70% 70% at 50% 50%, black, transparent);
    -webkit-mask-image: radial-gradient(ellipse 70% 70% at 50% 50%, black, transparent);
    animation: gridPulse 4s ease-in-out infinite;
}

@keyframes gridPulse {
    0%, 100% { opacity: 0.6; }
    50% { opacity: 0.8; }
}

.hero__container {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-16);
    align-items: center;
    position: relative;
    z-index: 1;
}

.hero__content {
    max-width: 600px;
}

.hero__tag {
    display: inline-flex;
    align-items: center;
    gap: var(--space-2);
    font-size: var(--text-xs);
    font-weight: var(--font-semibold);
    text-transform: uppercase;
    letter-spacing: var(--tracking-wider);
    color: var(--color-neon-cyan);
    padding: var(--space-2) var(--space-5);
    background: linear-gradient(135deg, rgba(0, 119, 255, 0.15) 0%, rgba(0, 212, 255, 0.12) 50%, rgba(0, 85, 204, 0.08) 100%);
    border: 1px solid rgba(0, 212, 255, 0.4);
    border-radius: var(--radius-full);
    margin-bottom: var(--space-6);
    backdrop-filter: blur(8px);
    box-shadow: 0 0 20px rgba(0, 212, 255, 0.2);
    animation: tagGlow 3s ease-in-out infinite;
}

@keyframes tagGlow {
    0%, 100% { 
        box-shadow: 0 0 20px rgba(0, 212, 255, 0.2);
        border-color: rgba(0, 212, 255, 0.4);
    }
    50% { 
        box-shadow: 0 0 30px rgba(0, 212, 255, 0.4);
        border-color: rgba(0, 212, 255, 0.6);
    }
}

.hero__tag .tag-icon {
    font-size: 1rem;
}

.hero__title {
    font-size: var(--text-4xl);
    margin-bottom: var(--space-6);
    letter-spacing: var(--tracking-tight);
}

.hero__description {
    font-size: var(--text-lg);
    color: var(--color-text-muted);
    margin-bottom: var(--space-10);
    max-width: 540px;
}

.hero__actions {
    display: flex;
    gap: var(--space-4);
    flex-wrap: wrap;
}

.hero__visual {
    display: flex;
    justify-content: center;
    align-items: center;
}

.hero__graphic {
    width: 100%;
    max-width: 500px;
    aspect-ratio: 1;
    background: 
        radial-gradient(circle at 30% 30%, rgba(0, 119, 255, 0.3) 0%, transparent 50%),
        radial-gradient(circle at 70% 70%, rgba(0, 212, 255, 0.3) 0%, transparent 50%),
        radial-gradient(circle at 50% 50%, rgba(0, 153, 255, 0.2) 0%, transparent 60%),
        conic-gradient(from 45deg at 50% 50%, 
            rgba(0, 119, 255, 0.2) 0deg, 
            rgba(0, 212, 255, 0.2) 60deg,
            rgba(0, 153, 255, 0.2) 120deg,
            rgba(0, 85, 204, 0.2) 180deg, 
            rgba(0, 191, 255, 0.2) 240deg,
            rgba(0, 119, 255, 0.2) 300deg,
            rgba(0, 212, 255, 0.2) 360deg);
    border-radius: 30% 70% 70% 30% / 30% 30% 70% 70%;
    animation: morph 8s ease-in-out infinite, graphicRotate 20s linear infinite;
    box-shadow: var(--shadow-neon-multi);
    position: relative;
}

.hero__graphic::before {
    content: '';
    position: absolute;
    inset: -2px;
    border-radius: inherit;
    padding: 2px;
    background: var(--gradient-cyber);
    -webkit-mask: linear-gradient(#fff 0 0) content-box, linear-gradient(#fff 0 0);
    -webkit-mask-composite: xor;
    mask-composite: exclude;
    opacity: 0.6;
    animation: borderGlow 3s ease-in-out infinite;
}

@keyframes graphicRotate {
    from { filter: hue-rotate(0deg); }
    to { filter: hue-rotate(360deg); }
}

@keyframes borderGlow {
    0%, 100% { opacity: 0.6; }
    50% { opacity: 1; }
}

@keyframes morph {
    0%, 100% {
        border-radius: 30% 70% 70% 30% / 30% 30% 70% 70%;
    }
    50% {
        border-radius: 70% 30% 30% 70% / 70% 70% 30% 30%;
    }
}

/* ===== Services Section ===== */
.services {
    background: var(--color-surface);
}

.services__grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: var(--space-8);
}

/* ===== Process Section ===== */
.process {
    background: 
        linear-gradient(135deg, var(--color-primary-50) 0%, var(--color-background) 100%);
}

.process__timeline {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--space-8);
}

/* ===== About Section ===== */
.about {
    background: var(--color-surface);
}

.about__content {
    max-width: 800px;
    margin-inline: auto;
}

/* ===== Contact Section ===== */
.contact {
    background: 
        linear-gradient(180deg, var(--color-background) 0%, var(--color-primary-50) 100%);
}

.contact__wrapper {
    max-width: 600px;
    margin-inline: auto;
}

.contact__form {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-6);
    padding: var(--space-10);
    background: var(--color-surface);
    border-radius: var(--radius-2xl);
    box-shadow: var(--shadow-lg);
}

.form__group {
    display: flex;
    flex-direction: column;
    gap: var(--space-2);
}

.form__group--full {
    grid-column: 1 / -1;
}

.form__label {
    font-size: var(--text-sm);
    font-weight: var(--font-medium);
    color: var(--color-neutral-700);
}

.form__input,
.form__textarea {
    padding: var(--space-4);
    background: var(--color-neutral-50);
    border: 2px solid var(--color-border);
    border-radius: var(--radius-lg);
    transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}

.form__input:focus:not(:focus-visible),
.form__textarea:focus:not(:focus-visible) {
    outline: none;
}
.form__input:focus,
.form__textarea:focus {
    border-color: var(--color-primary);
    box-shadow: 0 0 0 4px var(--color-primary-50);
}
.form__input:focus-visible,
.form__textarea:focus-visible {
    outline: 2px solid currentColor;
    outline-offset: 2px;
}

.form__textarea {
    resize: vertical;
    min-height: 120px;
}

/* ===== Footer ===== */
.footer {
    background: var(--color-neutral-900);
    color: var(--color-neutral-300);
    padding-block: var(--space-16) var(--space-8);
}

.footer .logo-text {
    color: white;
}

.footer__content {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    flex-wrap: wrap;
    gap: var(--space-8);
    margin-bottom: var(--space-12);
}

.footer__tagline {
    margin-top: var(--space-3);
    color: var(--color-neutral-400);
}

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

.footer__links a {
    font-size: var(--text-sm);
    color: var(--color-neutral-300);
    transition: color var(--transition-fast);
    position: relative;
    display: inline-block;
}

.footer__links a::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    right: 0;
    width: 0;
    height: 2px;
    background: var(--color-primary);
    transition: width 0.3s ease;
}

.footer__links a:hover {
    color: white;
}

.footer__links a:hover::after {
    width: 100%;
}

/* Kontakt-Items ohne Hover-Effekt */
.footer__links-group--contact {
    text-align: right;
}

.footer__contact {
    flex-direction: column;
    align-items: flex-end;
}

.footer__contact-item {
    font-size: var(--text-sm);
    color: var(--color-neutral-300);
    line-height: 1.6;
    text-align: right;
}

.footer__contact a {
    white-space: nowrap;
    display: inline-block;
    font-size: 0.85rem;
}

.footer__link {
    font-size: var(--text-sm);
    transition: color var(--transition-fast);
}

.footer__link:hover {
    color: white;
}

.footer__bottom {
    padding-top: var(--space-8);
    border-top: 1px solid var(--color-neutral-700);
    font-size: var(--text-sm);
    color: var(--color-neutral-500);
}

/* ===== Utility Classes ===== */
.visually-hidden {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
}

/* ===== Accessibility Enhancements ===== */

/* Focus styles for keyboard navigation */
.keyboard-navigation *:focus {
    outline: 3px solid var(--color-neon, var(--color-primary));
    outline-offset: 3px;
}

.keyboard-navigation a:focus,
.keyboard-navigation button:focus {
    outline: 3px solid var(--color-neon, var(--color-primary));
    outline-offset: 3px;
}

/* Reduced motion mode */
.reduce-motion * {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
}

/* Ensure sufficient color contrast for text */
.high-contrast-text {
    color: var(--color-neutral-900);
    text-shadow: none;
}

/* Screen reader only content */
.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;
}

/* Focus-visible polyfill styles */
:focus:not(:focus-visible) {
    outline: none;
}

:focus-visible {
    outline: 3px solid var(--color-neon, var(--color-primary));
    outline-offset: 3px;
}

/* ===== Animations ===== */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.animate-fade-in-up {
    animation: fadeInUp 0.6s ease forwards;
}

.animate-delay-1 { animation-delay: 0.1s; }
.animate-delay-2 { animation-delay: 0.2s; }
.animate-delay-3 { animation-delay: 0.3s; }
.animate-delay-4 { animation-delay: 0.4s; }