/* ===========================
   CSS Variables & Reset
   =========================== */
:root {
    /* Brand Colors */
    --primary-dark: #1a365d;
    --accent-gold: #b7791f;
    --text-color: #4a5568;
    --light-gray: #e2e8f0;
    --white: #ffffff;
    --off-white: #f7fafc;

    /* Typography */
    --font-heading: 'Montserrat', sans-serif;
    --font-body: 'Open Sans', sans-serif;

    /* Spacing */
    --section-padding: 80px 0;
    --container-max-width: 1200px;

    /* Transitions */
    --transition: all 0.3s ease;
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-body);
    color: var(--text-color);
    line-height: 1.6;
    overflow-x: hidden;
}

/* ===========================
   Typography
   =========================== */
h1,
h2,
h3,
h4,
h5,
h6 {
    font-family: var(--font-heading);
    color: var(--primary-dark);
    line-height: 1.2;
    margin-bottom: 1rem;
}

h1 {
    font-size: 3rem;
    font-weight: 700;
}

h2 {
    font-size: 2.5rem;
    font-weight: 700;
}

h3 {
    font-size: 1.75rem;
    font-weight: 600;
}

h4 {
    font-size: 1.25rem;
    font-weight: 600;
}

p {
    margin-bottom: 1rem;
}

a {
    color: var(--accent-gold);
    text-decoration: none;
    transition: var(--transition);
}

a:hover {
    color: var(--primary-dark);
}

/* ===========================
   Layout
   =========================== */
.container {
    max-width: var(--container-max-width);
    margin: 0 auto;
    padding: 0 2rem;
}

.section {
    padding: var(--section-padding);
}

.section-title {
    text-align: center;
    margin-bottom: 3rem;
    position: relative;
}

.section-title::after {
    content: '';
    display: block;
    width: 80px;
    height: 4px;
    background: linear-gradient(90deg, var(--accent-gold), var(--primary-dark));
    margin: 1rem auto 0;
    border-radius: 2px;
}

.section-intro {
    text-align: center;
    max-width: 800px;
    margin: 0 auto 3rem;
    font-size: 1.1rem;
}

/* ===========================
   Navigation
   =========================== */
#navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background: rgba(255, 255, 255, 0.98);
    backdrop-filter: blur(10px);
    box-shadow: 0 2px 20px rgba(26, 54, 93, 0.1);
    z-index: 1000;
    transition: var(--transition);
}

.nav-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem 2rem;
}

.logo img {
    height: auto;
    width: 480px;
    /* Increased from 400px */
    transition: var(--transition);
}

.logo img:hover {
    transform: scale(1.05);
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: 0.5rem;
    /* Reduced gap further */
    align-items: center;
}

.nav-menu a {
    font-family: var(--font-heading);
    font-weight: 600;
    color: var(--primary-dark);
    padding: 0.5rem 0.6rem;
    /* Smaller horizontal padding */
    transition: var(--transition);
    position: relative;
    white-space: nowrap;
    /* Prevent line breaks */
}

.nav-menu a::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 0;
    height: 2px;
    background: var(--accent-gold);
    transition: var(--transition);
}

.nav-menu a:hover::after,
.nav-menu a.active::after {
    width: 80%;
}

.nav-linkedin {
    color: var(--primary-dark) !important;
    font-size: 1.2rem;
    display: flex;
    align-items: center;
    transition: var(--transition);
}

.nav-linkedin:hover {
    color: var(--accent-gold) !important;
    transform: translateY(-2px);
}

.nav-cta {
    background: var(--accent-gold);
    color: var(--white) !important;
    padding: 0.75rem 1.5rem !important;
    border-radius: 50px;
}

.nav-cta:hover {
    background: var(--primary-dark);
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(183, 121, 31, 0.3);
}

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

.mobile-menu-toggle {
    display: none;
    flex-direction: column;
    background: none;
    border: none;
    cursor: pointer;
    padding: 0.5rem;
}

.mobile-menu-toggle span {
    width: 25px;
    height: 3px;
    background: var(--primary-dark);
    margin: 3px 0;
    transition: var(--transition);
    border-radius: 2px;
}

/* ===========================
   Buttons
   =========================== */
.btn {
    display: inline-block;
    padding: 1rem 2rem;
    font-family: var(--font-heading);
    font-weight: 600;
    border-radius: 50px;
    transition: var(--transition);
    cursor: pointer;
    border: none;
    text-align: center;
}

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

.btn-primary:hover {
    background: var(--primary-dark);
    transform: translateY(-3px);
    box-shadow: 0 8px 20px rgba(183, 121, 31, 0.3);
}

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

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

/* ===========================
   Hero Section
   =========================== */
.hero {
    background: linear-gradient(135deg, var(--off-white) 0%, var(--light-gray) 100%);
    padding: 180px 0 120px;
    text-align: center;
    position: relative;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: -50%;
    right: -10%;
    width: 600px;
    height: 600px;
    background: radial-gradient(circle, rgba(183, 121, 31, 0.1) 0%, transparent 70%);
    border-radius: 50%;
}

.hero-content {
    position: relative;
    z-index: 1;
}

.hero-title {
    font-size: 3.5rem;
    color: var(--primary-dark);
    margin-bottom: 1.5rem;
    animation: fadeInUp 0.8s ease;
}

.hero-subtitle {
    font-family: var(--font-heading);
    font-size: 1.75rem;
    font-weight: 600;
    color: var(--accent-gold);
    margin-bottom: 2.5rem;
    animation: fadeInUp 0.8s ease 0.2s backwards;
}

.hero .btn {
    animation: fadeInUp 0.8s ease 0.4s backwards;
    font-size: 1.1rem;
}

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

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

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

.about-grid {
    display: grid;
    grid-template-columns: 40% 1fr;
    gap: 4rem;
    align-items: start;
}

.about-image img {
    width: 100%;
    border-radius: 12px;
    box-shadow: 0 10px 40px rgba(26, 54, 93, 0.15);
    transition: var(--transition);
}

.about-image img:hover {
    transform: translateY(-5px);
    box-shadow: 0 15px 50px rgba(26, 54, 93, 0.2);
}

.about-content h2 {
    margin-bottom: 1.5rem;
}

.qualifications {
    margin-top: 2rem;
    padding: 1.5rem;
    background: var(--off-white);
    border-radius: 8px;
    border-left: 4px solid var(--accent-gold);
}

.qualifications h3 {
    font-size: 1.25rem;
    margin-bottom: 1rem;
}

.qualifications ul {
    list-style: none;
    padding-left: 0;
}

.qualifications li {
    padding: 0.5rem 0;
    padding-left: 1.5rem;
    position: relative;
}

.qualifications li::before {
    content: '✓';
    position: absolute;
    left: 0;
    color: var(--accent-gold);
    font-weight: bold;
}

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

.services-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 2rem;
}

.service-card {
    background: var(--white);
    padding: 2rem;
    border-radius: 12px;
    box-shadow: 0 4px 20px rgba(26, 54, 93, 0.1);
    transition: var(--transition);
    display: flex;
    flex-direction: column;
}

.service-card:hover {
    transform: translateY(-8px);
    box-shadow: 0 12px 40px rgba(26, 54, 93, 0.15);
}

.service-icon {
    font-size: 3rem;
    margin-bottom: 1rem;
}

.service-card h3 {
    margin-bottom: 1rem;
    color: var(--primary-dark);
}

.service-list {
    list-style: none;
    margin: 1.5rem 0;
    flex-grow: 1;
}

.service-list li {
    padding: 0.5rem 0;
    padding-left: 1.5rem;
    position: relative;
}

.service-list li::before {
    content: '→';
    position: absolute;
    left: 0;
    color: var(--accent-gold);
    font-weight: bold;
}

.service-highlights {
    margin: 1rem 0;
}

.service-card .btn {
    margin-top: auto;
}

/* ===========================
   Focus Areas Section
   =========================== */
.focus-areas {
    background: var(--white);
}

.focus-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 2rem;
    margin-bottom: 2rem;
}

.focus-item {
    padding: 1.5rem;
    background: var(--off-white);
    border-radius: 8px;
    transition: var(--transition);
    border-top: 4px solid var(--accent-gold);
}

.focus-item:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 25px rgba(26, 54, 93, 0.1);
}

.focus-item h4 {
    color: var(--primary-dark);
    margin-bottom: 0.75rem;
}

.focus-note {
    text-align: center;
    font-style: italic;
    color: var(--accent-gold);
    font-weight: 600;
    font-size: 1.1rem;
    margin-top: 2rem;
}

/* ===========================
   Working Principles Section
   =========================== */
.working-principles {
    background: var(--light-gray);
}

.principles-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 2rem;
}

.principle-card {
    background: var(--white);
    padding: 2rem;
    border-radius: 12px;
    box-shadow: 0 4px 20px rgba(26, 54, 93, 0.08);
    transition: var(--transition);
}

.principle-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 30px rgba(26, 54, 93, 0.12);
}

.principle-card h3 {
    color: var(--accent-gold);
    font-size: 1.25rem;
    margin-bottom: 1rem;
    letter-spacing: 1px;
}


/* ===========================
   Cooperations Section
   =========================== */
.cooperations {
    background-color: var(--white);
}

.cooperation-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 3rem;
    margin-top: 1rem;
}

.cooperation-card {
    background: var(--off-white);
    border-radius: 12px;
    padding: 3rem;
    text-align: center;
    transition: var(--transition);
    border: 1px solid #e2e8f0;
    display: flex;
    flex-direction: column;
    align-items: center;
}

.cooperation-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 15px 35px rgba(0, 0, 0, 0.05);
}

.cooperation-logo {
    height: 80px;
    width: auto;
    margin-bottom: 2rem;
    object-fit: contain;
    filter: grayscale(100%);
    opacity: 0.8;
    transition: var(--transition);
}

.cooperation-logo.tecnetworks-logo {
    mix-blend-mode: normal;
    filter: grayscale(100%);
    opacity: 0.8;
}

.cooperation-card:hover .cooperation-logo {
    filter: grayscale(0%);
    opacity: 1;
}

.cooperation-card:hover .cooperation-logo.tecnetworks-logo {
    filter: grayscale(0%);
    opacity: 1;
}

.cooperation-content h3 {
    color: var(--primary-dark);
    margin-bottom: 1rem;
    font-size: 1.5rem;
}

.cooperation-content p {
    margin-bottom: 1.5rem;
    color: var(--text-dark);
    line-height: 1.7;
}

.cooperation-list {
    list-style: none;
    padding: 0;
    margin: 0 0 2rem 0;
    text-align: left;
    display: inline-block;
}

.cooperation-list li {
    margin-bottom: 0.75rem;
    padding-left: 1.5rem;
    position: relative;
    font-size: 0.95rem;
}

.cooperation-list li::before {
    content: '→';
    position: absolute;
    left: 0;
    color: var(--accent-gold);
    font-weight: bold;
}

.cooperation-card .btn {
    margin-top: auto;
}

@media (max-width: 992px) {
    .cooperation-grid {
        grid-template-columns: 1fr;
        gap: 2rem;
    }
}

/* ===========================
   Blog & Newsletter Section
   =========================== */
.blog {
    background: var(--off-white);
}

.blog-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 2rem;
    margin-bottom: 4rem;
}

.blog-card {
    background: var(--white);
    border-radius: 12px;
    overflow: hidden;
    box-shadow: 0 4px 20px rgba(26, 54, 93, 0.1);
    transition: var(--transition);
    display: flex;
    flex-direction: column;
}

.blog-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 12px 30px rgba(26, 54, 93, 0.15);
}

.blog-image {
    height: 200px;
    background-color: #cbd5e0;
    position: relative;
    /* Placeholder pattern or overlay could go here */
}

.blog-date {
    position: absolute;
    top: 1rem;
    right: 1rem;
    background: var(--white);
    padding: 0.5rem 0.8rem;
    border-radius: 8px;
    text-align: center;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
}

.blog-date .day {
    display: block;
    font-size: 1.2rem;
    font-weight: 700;
    color: var(--primary-dark);
    line-height: 1;
}

.blog-date .month {
    display: block;
    font-size: 0.8rem;
    font-weight: 600;
    color: var(--accent-gold);
    text-transform: uppercase;
}

.blog-content {
    padding: 1.5rem;
    display: flex;
    flex-direction: column;
    flex-grow: 1;
}

.blog-category {
    font-size: 0.8rem;
    text-transform: uppercase;
    color: var(--accent-gold);
    font-weight: 600;
    margin-bottom: 0.5rem;
    letter-spacing: 1px;
}

.blog-content h3 {
    font-size: 1.25rem;
    margin-bottom: 0.75rem;
    line-height: 1.4;
}

.blog-content p {
    font-size: 0.95rem;
    color: var(--text-color);
    margin-bottom: 1.5rem;
    flex-grow: 1;
}

.read-more {
    color: var(--primary-dark);
    font-weight: 600;
    font-size: 0.9rem;
}

.read-more:hover {
    color: var(--accent-gold);
    letter-spacing: 0.5px;
}

/* Newsletter Box */
.newsletter-box {
    background: linear-gradient(135deg, var(--primary-dark), #2a4365);
    border-radius: 16px;
    padding: 3rem;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 3rem;
    align-items: center;
    color: var(--white);
    position: relative;
    overflow: hidden;
}

.newsletter-box::before {
    content: '';
    position: absolute;
    top: -50%;
    right: -10%;
    width: 300px;
    height: 300px;
    background: radial-gradient(circle, rgba(183, 121, 31, 0.2) 0%, transparent 70%);
    border-radius: 50%;
}

.newsletter-content h3 {
    color: var(--white);
    margin-bottom: 1rem;
}

.newsletter-content p {
    color: rgba(255, 255, 255, 0.9);
    margin-bottom: 0;
}

.newsletter-form {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.newsletter-form input {
    padding: 1rem;
    border-radius: 8px;
    border: none;
    font-family: var(--font-body);
}

.newsletter-form .btn {
    width: 100%;
}

.privacy-hint a {
    color: var(--accent-gold);
    text-decoration: underline;
}

.privacy-hint a:hover {
    color: var(--white);
}

/* ===========================
   Publications Section
   =========================== */
.publications {
    background: var(--white);
}

.publication-clusters {
    display: flex;
    flex-direction: column;
    gap: 4rem;
}

.cluster-title {
    font-size: 1.5rem;
    color: var(--primary-dark);
    margin-bottom: 2rem;
    padding-bottom: 0.5rem;
    border-bottom: 2px solid var(--accent-gold);
    display: inline-block;
}

.publication-items {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
    gap: 2rem;
}

.pub-item {
    display: flex;
    flex-direction: column;
    background: var(--white);
    padding: 2rem;
    border-radius: 12px;
    box-shadow: 0 4px 20px rgba(26, 54, 93, 0.08);
    transition: var(--transition);
    border: 1px solid var(--light-gray);
}

.pub-item:hover {
    transform: translateY(-8px);
    box-shadow: 0 12px 40px rgba(26, 54, 93, 0.15);
    border-color: var(--accent-gold);
}

.pub-cover {
    width: 160px;
    aspect-ratio: 1 / 1.4;
    margin: 0 auto 1.5rem;
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.15);
    border-radius: 4px;
    transition: var(--transition);
    flex-shrink: 0;
}

.pub-item:hover .pub-cover {
    transform: scale(1.05);
}

.pub-cover img {
    width: 100%;
    height: auto;
    display: block;
    border-radius: 4px;
}

/* Fallback/Spacing if no cover is present */
.pub-item.no-cover .pub-info {
    padding-left: 0;
}

.pub-info {
    text-align: center;
    display: flex;
    flex-direction: column;
    flex-grow: 1;
    /* Allow info to take remaining space */
}

.pub-info h4 {
    font-size: 1.2rem;
    margin-bottom: 0.75rem;
    color: var(--primary-dark);
    min-height: 3em;
    display: flex;
    align-items: center;
    justify-content: center;
}

.pub-meta {
    font-size: 0.9rem;
    color: var(--text-color);
    margin-bottom: 1rem;
    line-height: 1.6;
}

.pub-description {
    font-style: italic;
    font-size: 0.95rem;
    margin-bottom: 1.5rem;
}

.pub-info .btn-secondary {
    padding: 0.6rem 1.2rem;
    font-size: 0.9rem;
}

@media (max-width: 768px) {
    .pub-item {
        flex-direction: column;
        text-align: center;
    }

    .pub-cover {
        flex: 0 0 auto;
        width: 150px;
        margin: 0 auto;
    }
}

/* ===========================
   Contact Section
   =========================== */
.contact {
    background: var(--off-white);
}

.contact-grid {
    display: grid;
    grid-template-columns: 60% 1fr;
    gap: 3rem;
}

.contact-form {
    background: var(--white);
    padding: 2rem;
    border-radius: 12px;
    box-shadow: 0 4px 20px rgba(26, 54, 93, 0.1);
}

.form-group {
    margin-bottom: 1.5rem;
}

.form-group label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: 600;
    color: var(--primary-dark);
}

.form-group input,
.form-group textarea {
    width: 100%;
    padding: 0.75rem 1rem;
    border: 2px solid var(--light-gray);
    border-radius: 8px;
    font-family: var(--font-body);
    font-size: 1rem;
    transition: var(--transition);
}

.form-group input:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--accent-gold);
    box-shadow: 0 0 0 3px rgba(183, 121, 31, 0.1);
}

.checkbox-group label {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-weight: 400;
}

.checkbox-group input[type="checkbox"] {
    width: auto;
}

.form-message {
    margin-top: 1rem;
    padding: 1rem;
    border-radius: 8px;
    display: none;
}

/* Newsletter Container für Iframe */
.newsletter-form-container {
    width: 100%;
    max-width: 540px;
    margin: 0 auto;
}

/* Obsolete Newsletter-Form Styling – verdeckt, da Iframe genutzt wird */
.newsletter-form {
    display: none !important;
}

.form-message {
    padding: 1rem;
    border-radius: 4px;
    margin-bottom: 1.5rem;
    display: none;
    text-align: center;
}

.contact-info {
    padding: 2rem;
}

.contact-info h3 {
    font-size: 2rem;
    margin-bottom: 0.5rem;
}

.contact-tagline {
    font-family: var(--font-heading);
    color: var(--accent-gold);
    font-weight: 600;
    margin-bottom: 2rem;
}

.contact-details {
    margin: 2rem 0;
}

.contact-details p {
    margin-bottom: 1rem;
    line-height: 1.8;
}

.contact-note {
    margin-top: 2rem;
    padding: 1.5rem;
    background: var(--light-gray);
    border-radius: 8px;
    font-size: 0.95rem;
}

/* ===========================
   Footer
   =========================== */
.footer {
    background: var(--primary-dark);
    color: var(--white);
    padding: 3rem 0 1.5rem;
}

.footer-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 3rem;
    margin-bottom: 2rem;
}

.footer-logo {
    height: 120px;
    width: auto;
    margin-bottom: 1rem;
    filter: brightness(0) invert(1);
}

.footer h4 {
    color: var(--accent-gold);
    margin-bottom: 1rem;
}

.footer ul {
    list-style: none;
}

.footer ul li {
    margin-bottom: 0.5rem;
}

.footer a {
    color: var(--white);
    opacity: 0.9;
}

.footer a:hover {
    color: var(--accent-gold);
    opacity: 1;
}

.footer-bottom {
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    padding-top: 1.5rem;
    text-align: center;
}

.footer-membership {
    margin-top: 0.5rem;
    font-size: 0.9rem;
    opacity: 0.8;
}

/* ===========================
   Responsive Design
   =========================== */
@media (max-width: 1024px) {
    .about-grid {
        grid-template-columns: 1fr;
        gap: 2rem;
    }

    .services-grid {
        grid-template-columns: 1fr;
    }

    .focus-grid {
        grid-template-columns: repeat(2, 1fr);
    }

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

@media (max-width: 768px) {
    h1 {
        font-size: 2.5rem;
    }

    h2 {
        font-size: 2rem;
    }

    .hero {
        padding: 140px 0 80px;
    }

    .hero-title {
        font-size: 2.5rem;
    }

    .hero-subtitle {
        font-size: 1.25rem;
    }

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

    .nav-menu {
        position: fixed;
        top: 80px;
        left: -100%;
        flex-direction: column;
        background: var(--white);
        width: 100%;
        padding: 2rem;
        box-shadow: 0 4px 20px rgba(26, 54, 93, 0.1);
        transition: var(--transition);
    }

    .nav-menu.active {
        left: 0;
    }

    .focus-grid {
        grid-template-columns: 1fr;
    }

    .blog-grid {
        grid-template-columns: 1fr;
    }

    .principles-grid {
        grid-template-columns: 1fr;
    }

    .publications-grid {
        grid-template-columns: 1fr;
    }

    .footer-grid {
        grid-template-columns: 1fr;
        gap: 2rem;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0 1rem;
    }

    .hero-title {
        font-size: 2rem;
    }

    .hero-subtitle {
        font-size: 1.1rem;
    }

    .section {
        padding: 60px 0;
    }

    .newsletter-box {
        grid-template-columns: 1fr;
        text-align: center;
        padding: 2rem;
    }

    .newsletter-form .btn {
        margin-top: 0.5rem;
    }
}