/* Reset und Basis Styles */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    --primary-blue: #4BA5C8;
    --dark-blue: #2C7A9D;
    --black: #1a1a1a;
    --white: #ffffff;
    --light-gray: #f8f9fa;
    --gray: #6c757d;
    --transition: all 0.3s ease;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    line-height: 1.6;
    color: var(--black);
    background-color: var(--white);
}

/* Reduce motion for users who prefer it */
@media (prefers-reduced-motion: reduce) {
    * {
        animation-duration: 0.001ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.001ms !important;
        scroll-behavior: auto !important;
    }
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

/* Navigation */
.navbar {
    position: fixed;
    top: 0;
    width: 100%;
    background-color: var(--white);
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
    z-index: 1000;
    transition: var(--transition);
}

.navbar .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 15px 20px;
}

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

.logo .logo-text {
    font-weight: 700;
    font-size: 20px;
    color: var(--dark-blue);
    line-height: 50px;
    display: inline-block;
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: 40px;
}

.nav-link {
    text-decoration: none;
    color: var(--black);
    font-weight: 500;
    font-size: 16px;
    transition: var(--transition);
    position: relative;
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: -5px;
    left: 0;
    width: 0;
    height: 2px;
    background-color: var(--primary-blue);
    transition: var(--transition);
}

.nav-link:hover {
    color: var(--primary-blue);
}

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

.hamburger {
    display: none;
    flex-direction: column;
    cursor: pointer;
    gap: 4px;
    background: transparent;
    border: none;
    padding: 8px;
}

.hamburger span {
    width: 25px;
    height: 3px;
    background-color: var(--black);
    transition: var(--transition);
}

/* Skip link visible on focus */
.skip-link {
    position: absolute;
    top: -40px;
    left: 10px;
    background: var(--black);
    color: var(--white);
    padding: 8px 12px;
    border-radius: 6px;
    text-decoration: none;
    transition: top 0.2s ease;
    z-index: 1001;
}

.skip-link:focus {
    top: 10px;
}

/* Hero Section */
.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, var(--light-gray) 0%, var(--white) 100%);
    overflow: hidden;
    padding-top: 80px;
}

.hero-background {
    position: absolute;
    top: 0;
    right: 0;
    width: 60%;
    height: 100%;
    background: linear-gradient(135deg, rgba(75, 165, 200, 0.1) 0%, rgba(75, 165, 200, 0.05) 100%);
    clip-path: polygon(25% 0, 100% 0, 100% 100%, 0% 100%);
    z-index: 0;
}

.hero-content {
    position: relative;
    z-index: 1;
    text-align: center;
    max-width: 800px;
    padding: 40px 20px;
}

.hero-title {
    font-size: 64px;
    font-weight: 700;
    color: var(--black);
    margin-bottom: 20px;
    letter-spacing: -1px;
}

.hero-subtitle {
    font-size: 24px;
    color: var(--gray);
    margin-bottom: 40px;
    font-weight: 300;
}

.cta-button {
    display: inline-block;
    padding: 16px 40px;
    background-color: var(--primary-blue);
    color: var(--white);
    text-decoration: none;
    font-weight: 600;
    font-size: 18px;
    border-radius: 50px;
    transition: var(--transition);
    box-shadow: 0 4px 15px rgba(75, 165, 200, 0.3);
}

.cta-button:hover {
    background-color: var(--dark-blue);
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(75, 165, 200, 0.4);
}

/* About Section */
.about {
    padding: 100px 20px;
    background-color: var(--white);
}

.section-title {
    font-size: 48px;
    font-weight: 700;
    text-align: center;
    margin-bottom: 60px;
    color: var(--black);
    position: relative;
}

.section-title::after {
    content: '';
    position: absolute;
    bottom: -15px;
    left: 50%;
    transform: translateX(-50%);
    width: 80px;
    height: 4px;
    background-color: var(--primary-blue);
}

.about-content {
    max-width: 800px;
    margin: 0 auto;
}

.about-text p {
    font-size: 18px;
    line-height: 1.8;
    color: var(--gray);
    margin-bottom: 24px;
}

/* Contact Section */
.contact {
    padding: 100px 20px;
    background-color: var(--light-gray);
}

.contact-content {
    max-width: 700px;
    margin: 0 auto;
}

.contact-form {
    background-color: var(--white);
    padding: 50px;
    border-radius: 10px;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.08);
}

.form-group {
    margin-bottom: 25px;
}

.form-group label {
    display: block;
    font-weight: 600;
    margin-bottom: 8px;
    color: var(--black);
    font-size: 14px;
}

.form-group input,
.form-group textarea {
    width: 100%;
    padding: 14px;
    border: 2px solid #e0e0e0;
    border-radius: 8px;
    font-size: 16px;
    font-family: inherit;
    transition: var(--transition);
}

.form-group input:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--primary-blue);
}

.form-group textarea {
    resize: vertical;
}

.checkbox-group {
    display: flex;
    align-items: flex-start;
    gap: 10px;
}

.checkbox-group input[type="checkbox"] {
    width: auto;
    margin-top: 4px;
    cursor: pointer;
}

.checkbox-group label {
    font-weight: 400;
    font-size: 14px;
    margin-bottom: 0;
    cursor: pointer;
}

.checkbox-group a {
    color: var(--primary-blue);
    text-decoration: none;
}

.checkbox-group a:hover {
    text-decoration: underline;
}

.submit-button {
    width: 100%;
    padding: 16px;
    background-color: var(--primary-blue);
    color: var(--white);
    border: none;
    border-radius: 50px;
    font-size: 18px;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
}

.submit-button:focus-visible,
.cta-button:focus-visible,
.nav-link:focus-visible,
.hamburger:focus-visible {
    outline: 3px solid var(--primary-blue);
    outline-offset: 2px;
    border-radius: 8px;
}

.submit-button:hover {
    background-color: var(--dark-blue);
    transform: translateY(-2px);
}

.form-message {
    margin-top: 20px;
    padding: 15px;
    border-radius: 8px;
    text-align: center;
    font-weight: 500;
    display: none;
}

.form-message.success {
    background-color: #d4edda;
    color: #155724;
    display: block;
}

.form-message.error {
    background-color: #f8d7da;
    color: #721c24;
    display: block;
}

/* Footer */
.footer {
    background-color: var(--black);
    color: var(--white);
    padding: 60px 20px 30px;
}

.footer-content {
    text-align: center;
}

.footer-links {
    display: flex;
    justify-content: center;
    gap: 30px;
    margin-bottom: 30px;
}

.footer-links a {
    color: var(--white);
    text-decoration: none;
    font-size: 14px;
    transition: var(--transition);
}

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

.footer-copyright {
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    padding-top: 20px;
    font-size: 14px;
    color: var(--gray);
}

/* Responsive Design */
@media (max-width: 768px) {
    .hamburger {
        display: flex;
    }

    .nav-menu {
        position: fixed;
        left: -100%;
        top: 80px;
        flex-direction: column;
        background-color: var(--white);
        width: 100%;
        text-align: center;
        transition: var(--transition);
        box-shadow: 0 10px 27px rgba(0, 0, 0, 0.1);
        padding: 20px 0;
        gap: 0;
    }

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

    .nav-menu li {
        padding: 15px 0;
    }

    .hero-title {
        font-size: 40px;
        line-height: 1.2;
        padding: 0 10px;
    }

    .hero-subtitle {
        font-size: 18px;
        padding: 0 10px;
    }

    .section-title {
        font-size: 36px;
    }

    .contact-form {
        padding: 30px 20px;
    }

    .footer-links {
        flex-direction: column;
        gap: 15px;
    }
}

@media (max-width: 480px) {
    .hero-title {
        font-size: 30px;
        line-height: 1.25;
    }

    .hero-subtitle {
        font-size: 16px;
    }

    .cta-button {
        padding: 16px 28px;
        font-size: 16px;
    }

    .form-group input,
    .form-group textarea {
        font-size: 17px; /* improve readability */
    }
}