/* ===================================
   CSS Variables & Base Styles
   =================================== */
:root {
    --color-primary: #1a3a2f;
    --color-primary-dark: #0f2920;
    --color-primary-light: #2d5a4a;
    --color-secondary: #c9a962;
    --color-secondary-light: #ddc587;
    --color-white: #ffffff;
    --color-off-white: #f8f7f4;
    --color-gray-light: #e8e6e1;
    --color-gray: #9a9890;
    --color-gray-dark: #4a4a47;
    --color-text: #2c2c2a;
    --color-text-light: #6b6b68;
    
    --font-display: 'Ubuntu', -apple-system, BlinkMacSystemFont, sans-serif;
    --font-body: 'Source Sans 3', -apple-system, BlinkMacSystemFont, sans-serif;
    
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 1.5rem;
    --spacing-lg: 2.5rem;
    --spacing-xl: 4rem;
    --spacing-2xl: 6rem;
    
    --border-radius: 8px;
    --border-radius-lg: 16px;
    
    --transition-fast: 0.2s ease;
    --transition-normal: 0.3s ease;
    --transition-slow: 0.5s ease;
    
    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.08);
    --shadow-md: 0 4px 20px rgba(0, 0, 0, 0.12);
    --shadow-lg: 0 8px 40px rgba(0, 0, 0, 0.16);
}

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

html {
    scroll-behavior: smooth;
    font-size: 16px;
}

body {
    font-family: var(--font-body);
    font-size: 1rem;
    line-height: 1.6;
    color: var(--color-text);
    background-color: var(--color-white);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

img {
    max-width: 100%;
    height: auto;
    display: block;
}

a {
    color: inherit;
    text-decoration: none;
    transition: color var(--transition-fast);
}

ul {
    list-style: none;
}

/* Container */
.container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-md);
}

/* ===================================
   Typography
   =================================== */
h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-display);
    font-weight: 400;
    line-height: 1.2;
    letter-spacing: -0.4px;
    color: var(--color-primary);
}

.section-title {
    font-size: clamp(1.75rem, 4vw, 3rem);
    margin-bottom: var(--spacing-md);
    text-align: center;
    letter-spacing: -0.4px;
}

.section-subtitle {
    font-size: 1.125rem;
    color: var(--color-text-light);
    text-align: center;
    max-width: 700px;
    margin: 0 auto var(--spacing-xl);
}

/* ===================================
   Buttons
   =================================== */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 0.875rem 2rem;
    font-family: var(--font-body);
    font-size: 1rem;
    font-weight: 600;
    text-align: center;
    border: none;
    border-radius: var(--border-radius);
    cursor: pointer;
    transition: all var(--transition-normal);
    text-decoration: none;
}

.btn-primary {
    background-color: var(--color-primary);
    color: var(--color-white);
}

.btn-primary:hover {
    background-color: var(--color-primary-dark);
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.btn-secondary {
    background-color: var(--color-secondary);
    color: var(--color-primary-dark);
}

.btn-secondary:hover {
    background-color: var(--color-secondary-light);
    transform: translateY(-2px);
}

.btn-small {
    padding: 0.625rem 1.25rem;
    font-size: 0.875rem;
}

.btn-large {
    padding: 1.125rem 2.5rem;
    font-size: 1.125rem;
}

.btn-full {
    width: 100%;
}

/* ===================================
   Event Banner
   =================================== */
.event-banner {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1001;
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-light) 100%);
    color: var(--color-white);
    padding: 0.6rem var(--spacing-sm);
}

.event-banner-content {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-sm);
    flex-wrap: wrap;
    max-width: 1200px;
    margin: 0 auto;
    font-size: 0.9rem;
}

.event-banner-label {
    background-color: var(--color-secondary);
    color: var(--color-primary-dark);
    padding: 0.2rem 0.6rem;
    border-radius: 4px;
    font-weight: 600;
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.event-banner-date {
    font-weight: 500;
}

.event-banner-cta {
    color: var(--color-secondary);
    text-decoration: none;
    font-weight: 600;
    transition: color var(--transition-fast);
}

.event-banner-cta:hover {
    color: var(--color-secondary-light);
}

@media (max-width: 600px) {
    .event-banner-content {
        font-size: 0.8rem;
        gap: 0.5rem;
    }
    
    .event-banner-label {
        font-size: 0.65rem;
    }
}

/* ===================================
   Header
   =================================== */
.header {
    position: fixed;
    top: 44px;
    left: 0;
    right: 0;
    z-index: 1000;
    background-color: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid rgba(0, 0, 0, 0.05);
    transition: all var(--transition-normal);
}

.header-container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    max-width: 1400px;
    margin: 0 auto;
    padding: var(--spacing-sm) var(--spacing-md);
}

.logo img {
    height: 40px;
    width: auto;
}

.nav {
    display: flex;
    align-items: center;
    gap: var(--spacing-lg);
}

.nav-links {
    display: flex;
    align-items: center;
    gap: var(--spacing-lg);
}

.nav-links a {
    font-size: 0.9375rem;
    font-weight: 500;
    color: var(--color-text);
    position: relative;
}

.nav-links a::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 0;
    height: 2px;
    background-color: var(--color-primary);
    transition: width var(--transition-normal);
}

.nav-links a:hover::after {
    width: 100%;
}

.mobile-menu-toggle {
    display: none;
    flex-direction: column;
    justify-content: center;
    gap: 5px;
    width: 32px;
    height: 32px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 4px;
}

.mobile-menu-toggle span {
    display: block;
    width: 100%;
    height: 2px;
    background-color: var(--color-primary);
    transition: all var(--transition-normal);
}

/* ===================================
   Hero Section
   =================================== */
.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 120px var(--spacing-md) var(--spacing-xl);
    overflow: hidden;
}

.hero-background {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-light) 50%, var(--color-secondary) 100%);
    z-index: -2;
    overflow: hidden;
}

.hero-video-wrapper {
    position: absolute;
    top: 50%;
    left: 50%;
    width: 100vw;
    height: 100vh;
    transform: translate(-50%, -50%);
    pointer-events: none;
}

.hero-video {
    position: absolute;
    top: 50%;
    left: 50%;
    width: 177.78vh; /* 16:9 aspect ratio */
    height: 100vh;
    min-width: 100vw;
    min-height: 56.25vw; /* 16:9 aspect ratio */
    transform: translate(-50%, -50%);
    border: none;
}

/* Fallback background for when video doesn't load */
.hero-background::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-image: url('assets/images/gallery-1.jpg');
    background-size: cover;
    background-position: center;
    opacity: 0.15;
    z-index: -1;
}

.hero-overlay {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(
        to bottom,
        rgba(26, 58, 47, 0.75) 0%,
        rgba(26, 58, 47, 0.4) 50%,
        rgba(26, 58, 47, 0.7) 100%
    );
    z-index: 1;
}

.hero-content {
    position: relative;
    z-index: 2;
    text-align: center;
    max-width: 900px;
}

.hero-title {
    font-size: clamp(2rem, 5vw, 3rem);
    font-weight: 500;
    letter-spacing: -0.4px;
    color: var(--color-white);
    margin-bottom: var(--spacing-md);
    line-height: 1.15;
    text-shadow: 0 2px 4px rgba(0, 0, 0, 0.4), 0 4px 20px rgba(0, 0, 0, 0.3);
}

.hero-subtitle {
    font-size: clamp(1rem, 2vw, 1.25rem);
    color: rgba(255, 255, 255, 0.95);
    margin-bottom: var(--spacing-xl);
    line-height: 1.7;
    text-shadow: 0 1px 3px rgba(0, 0, 0, 0.4), 0 2px 10px rgba(0, 0, 0, 0.2);
}

.hero-subtitle strong {
    color: var(--color-secondary-light);
    font-weight: 600;
}

.hero-scroll-indicator {
    position: absolute;
    bottom: 40px;
    left: 50%;
    transform: translateX(-50%);
    animation: bounce 2s infinite;
    z-index: 2;
}

.scroll-arrow {
    width: 30px;
    height: 30px;
    border-right: 2px solid rgba(255, 255, 255, 0.6);
    border-bottom: 2px solid rgba(255, 255, 255, 0.6);
    transform: rotate(45deg);
}

@keyframes bounce {
    0%, 20%, 50%, 80%, 100% {
        transform: translateX(-50%) translateY(0);
    }
    40% {
        transform: translateX(-50%) translateY(-10px);
    }
    60% {
        transform: translateX(-50%) translateY(-5px);
    }
}

/* ===================================
   Förderung Banner
   =================================== */
.foerderung-banner {
    background-color: var(--color-secondary);
    padding: var(--spacing-lg) var(--spacing-md);
}

.foerderung-banner .container {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-md);
    text-align: center;
}

.foerderung-text {
    font-size: 1.125rem;
    color: var(--color-primary-dark);
    margin: 0;
}

.foerderung-text strong {
    font-weight: 700;
}

/* ===================================
   Campus Section
   =================================== */
.campus-section {
    padding: var(--spacing-2xl) 0;
    background-color: var(--color-off-white);
    overflow: hidden;
}

/* Gallery Marquee */
.gallery-marquee {
    width: 100%;
    overflow: hidden;
    padding: var(--spacing-sm) 0;
}

.gallery-track {
    display: flex;
    gap: var(--spacing-md);
    animation: marquee 40s linear infinite;
}

.gallery-marquee-reverse .gallery-track {
    animation: marquee-reverse 45s linear infinite;
}

.gallery-item {
    flex-shrink: 0;
    width: 350px;
    height: 220px;
    border-radius: var(--border-radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-md);
}

.gallery-item img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform var(--transition-slow);
}

.gallery-item:hover img {
    transform: scale(1.05);
}

@keyframes marquee {
    0% {
        transform: translateX(0);
    }
    100% {
        transform: translateX(-50%);
    }
}

@keyframes marquee-reverse {
    0% {
        transform: translateX(-50%);
    }
    100% {
        transform: translateX(0);
    }
}

/* ===================================
   Quote Section
   =================================== */
.quote-section {
    padding: var(--spacing-2xl) var(--spacing-md);
    background-color: var(--color-white);
}

.quote-content {
    max-width: 800px;
    margin: 0 auto;
    text-align: center;
}

.quote-text {
    font-family: var(--font-display);
    font-size: clamp(1.5rem, 3.5vw, 2.25rem);
    font-weight: 400;
    letter-spacing: -0.4px;
    color: var(--color-primary);
    margin-bottom: var(--spacing-lg);
    line-height: 1.4;
    position: relative;
}

.quote-text::before {
    content: '';
    display: none;
    line-height: 1;
}

.quote-description {
    font-size: 1.125rem;
    color: var(--color-text-light);
    margin-bottom: var(--spacing-xl);
    line-height: 1.7;
}

.author-photo {
    width: 120px;
    height: 120px;
    border-radius: 50%;
    object-fit: cover;
    object-position: center top;
    border: 4px solid var(--color-primary);
    margin: 0 auto var(--spacing-lg) auto;
    display: block;
}

.quote-author {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--spacing-md);
    text-align: center;
}

.signature {
    max-width: 200px;
    height: auto;
}

.author-info {
    display: flex;
    flex-direction: column;
    gap: 4px;
}

@media (max-width: 480px) {
    .author-photo {
        width: 100px;
        height: 100px;
    }
}

.author-name {
    font-family: var(--font-display);
    font-size: 1.125rem;
    font-weight: 600;
    color: var(--color-primary);
}

.author-title {
    font-size: 0.875rem;
    color: var(--color-text-light);
}

/* ===================================
   Registration Section
   =================================== */
.registration-section {
    padding: var(--spacing-2xl) var(--spacing-md);
    background-color: var(--color-primary);
    color: var(--color-white);
}

.registration-section .section-title {
    color: var(--color-white);
}

.registration-note {
    text-align: center;
    font-size: 1rem;
    color: rgba(255, 255, 255, 0.8);
    margin-bottom: var(--spacing-sm);
}

.registration-note strong {
    color: var(--color-secondary-light);
}

.registration-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-xl);
    margin-top: var(--spacing-xl);
    align-items: start;
}

/* Event Info */
.event-info {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-lg);
}

.event-card {
    background: rgba(255, 255, 255, 0.1);
    border-radius: var(--border-radius-lg);
    padding: var(--spacing-lg);
    text-align: center;
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.15);
}

.event-date {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-xs);
}

.event-day {
    font-family: var(--font-display);
    font-size: 1.75rem;
    font-weight: 600;
    color: var(--color-secondary-light);
}

.event-time {
    font-size: 1.5rem;
    font-weight: 500;
}

.event-location h3 {
    font-size: 1.25rem;
    color: var(--color-white);
    margin-bottom: var(--spacing-xs);
}

.event-location p {
    color: rgba(255, 255, 255, 0.7);
}

.calendar-note {
    font-size: 0.9375rem;
    color: rgba(255, 255, 255, 0.7);
    line-height: 1.6;
}

/* Registration Form */
.registration-form-wrapper {
    background: var(--color-white);
    border-radius: var(--border-radius-lg);
    padding: var(--spacing-lg);
    box-shadow: var(--shadow-lg);
}

.registration-form {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
}

.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-md);
}

.form-group {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-xs);
}

.form-group label {
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--color-text);
}

.form-group input,
.form-group select {
    padding: 0.875rem 1rem;
    font-family: var(--font-body);
    font-size: 1rem;
    color: var(--color-text);
    background-color: var(--color-off-white);
    border: 2px solid var(--color-gray-light);
    border-radius: var(--border-radius);
    transition: all var(--transition-fast);
}

.form-group input:focus,
.form-group select:focus {
    outline: none;
    border-color: var(--color-primary);
    background-color: var(--color-white);
}

.form-group select {
    cursor: pointer;
    appearance: none;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 12 12'%3E%3Cpath fill='%234a4a47' d='M6 8L1 3h10z'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 1rem center;
    padding-right: 2.5rem;
}

.form-disclaimer {
    font-size: 0.75rem;
    color: var(--color-text-light);
    line-height: 1.6;
    margin-top: var(--spacing-sm);
}

.form-disclaimer a {
    color: var(--color-primary);
    text-decoration: underline;
}

.form-disclaimer a:hover {
    color: var(--color-primary-light);
}

/* ===================================
   CTA Section
   =================================== */
.cta-section {
    padding: var(--spacing-2xl) var(--spacing-md);
    background: linear-gradient(135deg, var(--color-off-white) 0%, #e8e4db 100%);
    text-align: center;
    position: relative;
    overflow: hidden;
}

.cta-section::before {
    content: '';
    position: absolute;
    top: -50%;
    right: -20%;
    width: 500px;
    height: 500px;
    background: radial-gradient(circle, rgba(201, 169, 98, 0.1) 0%, transparent 70%);
    border-radius: 50%;
    pointer-events: none;
}

.cta-title {
    font-size: clamp(1.5rem, 3.5vw, 2.25rem);
    margin-bottom: var(--spacing-sm);
    position: relative;
}

.cta-subtitle {
    font-size: 1.125rem;
    color: var(--color-text-light);
    margin-bottom: var(--spacing-xl);
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
}

.cta-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--spacing-lg);
    margin-bottom: var(--spacing-xl);
    max-width: 1000px;
    margin-left: auto;
    margin-right: auto;
}

.cta-card {
    position: relative;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-xl) var(--spacing-lg);
    background: var(--color-white);
    border-radius: var(--border-radius-lg);
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.06);
    transition: all 0.4s cubic-bezier(0.25, 0.46, 0.45, 0.94);
    border: 1px solid rgba(0, 0, 0, 0.04);
    overflow: hidden;
}

.cta-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: var(--color-primary);
    transform: scaleX(0);
    transition: transform 0.4s ease;
}

.cta-card:hover {
    transform: translateY(-8px);
    box-shadow: 0 20px 40px rgba(26, 58, 47, 0.15);
}

.cta-card:hover::before {
    transform: scaleX(1);
}

.cta-card-instagram::before {
    background: linear-gradient(45deg, #f09433, #e6683c, #dc2743, #cc2366, #bc1888);
}

.cta-card-phone::before {
    background: var(--color-secondary);
}

.cta-icon {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 64px;
    height: 64px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--color-off-white) 0%, #e8e6e1 100%);
    color: var(--color-primary);
    margin-bottom: var(--spacing-xs);
    transition: all 0.4s ease;
}

.cta-card:hover .cta-icon {
    background: var(--color-primary);
    color: var(--color-white);
    transform: scale(1.1);
}

.cta-card-instagram:hover .cta-icon {
    background: linear-gradient(45deg, #f09433, #e6683c, #dc2743, #cc2366, #bc1888);
}

.cta-card-phone:hover .cta-icon {
    background: var(--color-secondary);
    color: var(--color-primary-dark);
}

.cta-label {
    font-weight: 600;
    color: var(--color-primary);
    font-size: 1rem;
    letter-spacing: -0.2px;
}

.cta-description {
    font-size: 0.875rem;
    color: var(--color-text-light);
}

.cta-arrow {
    position: absolute;
    top: var(--spacing-md);
    right: var(--spacing-md);
    color: var(--color-gray);
    opacity: 0;
    transform: translate(-8px, 8px);
    transition: all 0.3s ease;
}

.cta-card:hover .cta-arrow {
    opacity: 1;
    transform: translate(0, 0);
    color: var(--color-primary);
}

.cta-card-instagram:hover .cta-arrow {
    color: #dc2743;
}

.cta-card-phone:hover .cta-arrow {
    color: var(--color-secondary);
}

/* ===================================
   Footer
   =================================== */
.footer {
    padding: var(--spacing-xl) var(--spacing-md);
    background-color: var(--color-white);
    border-top: 1px solid var(--color-gray-light);
}

.footer .container {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--spacing-md);
    text-align: center;
}

.footer-logo img {
    height: 36px;
    width: auto;
    opacity: 0.8;
}

.copyright {
    font-size: 0.875rem;
    color: var(--color-text-light);
}

.footer-nav {
    display: flex;
    gap: var(--spacing-lg);
}

.footer-nav a {
    font-size: 0.875rem;
    color: var(--color-text-light);
    transition: color var(--transition-fast);
}

.footer-nav a:hover {
    color: var(--color-primary);
}

/* ===================================
   Mobile Menu Overlay
   =================================== */
.mobile-menu-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: var(--color-white);
    z-index: 999;
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    visibility: hidden;
    transition: all var(--transition-normal);
}

.mobile-menu-overlay.active {
    opacity: 1;
    visibility: visible;
}

.mobile-nav-links {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--spacing-lg);
}

.mobile-nav-links a {
    font-family: var(--font-display);
    font-size: 1.5rem;
    color: var(--color-primary);
}

/* ===================================
   Responsive Styles
   =================================== */
@media (max-width: 992px) {
    .registration-grid {
        grid-template-columns: 1fr;
        gap: var(--spacing-xl);
    }
    
    .cta-grid {
        grid-template-columns: 1fr;
        max-width: 400px;
        gap: var(--spacing-md);
    }
    
    .cta-card {
        padding: var(--spacing-lg);
    }
    
    .cta-arrow {
        display: none;
    }
    
    .gallery-item {
        width: 280px;
        height: 180px;
    }
}

@media (max-width: 768px) {
    .nav {
        display: none;
    }
    
    .mobile-menu-toggle {
        display: flex;
    }
    
    .hero {
        min-height: 90vh;
        padding-top: 100px;
    }
    
    .hero-title {
        font-size: clamp(1.75rem, 6vw, 2.5rem);
    }
    
    .foerderung-banner .container {
        flex-direction: column;
    }
    
    .form-row {
        grid-template-columns: 1fr;
    }
    
    .quote-text::before {
        display: none;
    }
    
    .gallery-item {
        width: 240px;
        height: 150px;
    }
}

@media (max-width: 480px) {
    :root {
        --spacing-lg: 2rem;
        --spacing-xl: 3rem;
        --spacing-2xl: 4rem;
    }
    
    .btn-large {
        padding: 1rem 1.75rem;
        font-size: 1rem;
    }
    
    .gallery-item {
        width: 200px;
        height: 130px;
    }
}

/* ===================================
   Animations
   =================================== */
@media (prefers-reduced-motion: no-preference) {
    .hero-content {
        animation: fadeInUp 1s ease-out;
    }
    
    .section-title {
        animation: fadeIn 0.8s ease-out;
    }
}

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

@keyframes fadeIn {
    from {
        opacity: 0;
    }
    to {
        opacity: 1;
    }
}

/* ===================================
   Utility Classes
   =================================== */
.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;
}