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

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    line-height: 1.7;
    color: #334155;
    overflow-x: hidden;
}

img:not(.guitar-icon):not(.family-icon) {
    max-width: 100%;
    height: auto;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 clamp(15px, 4vw, 40px);
}

/* Header & Navigation */
header {
    background-color: #0f172a;
    position: fixed;
    width: 100%;
    top: 0;
    z-index: 1000;
    box-shadow: 0 4px 6px rgba(0,0,0,0.1);
}

nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem clamp(1rem, 3vw, 2rem);
    max-width: 1200px;
    margin: 0 auto;
    position: relative;
}

.logo {
    font-size: clamp(1.1rem, 2.5vw, 1.5rem);
    font-weight: bold;
    color: #14b8a6;
    display: flex;
    align-items: center;
    gap: 8px;
}

/* Mobile-first: Nav hidden, Hamburger visible */
nav {
    flex-wrap: wrap;
}

.nav-links {
    display: none;
    flex-direction: column;
    width: 100%;
    list-style: none;
    background-color: #0f172a;
    padding: 0.5rem 0;
    gap: 0;
    order: 3;
}

.nav-links.active {
    display: flex;
}

.nav-links li {
    padding: 0.7rem 0;
    border-bottom: 1px solid #1e293b;
    text-align: center;
}

.nav-links li:last-child {
    border-bottom: none;
}

.nav-links a {
    color: #e2e8f0;
    text-decoration: none;
    font-weight: 500;
    font-size: 1.05rem;
    transition: color 0.3s;
}

.nav-links a:hover {
    color: #14b8a6;
}

.hamburger {
    display: flex;
    flex-direction: column;
    cursor: pointer;
    gap: 5px;
    padding: 5px;
}

.hamburger span {
    width: 28px;
    height: 3px;
    background-color: #e2e8f0;
    border-radius: 3px;
    transition: transform 0.3s, opacity 0.3s;
}

.hamburger.active span:nth-child(1) {
    transform: rotate(45deg) translate(6px, 6px);
}

.hamburger.active span:nth-child(2) {
    opacity: 0;
}

.hamburger.active span:nth-child(3) {
    transform: rotate(-45deg) translate(6px, -6px);
}

/* Desktop: Nav visible, Hamburger hidden */
@media (min-width: 901px) {
    nav {
        flex-wrap: nowrap;
    }

    .hamburger {
        display: none;
    }

    .nav-links {
        display: flex;
        flex-direction: row;
        width: auto;
        padding: 0;
        gap: clamp(1rem, 2.5vw, 2.5rem);
        order: 0;
        background-color: transparent;
    }

    .nav-links li {
        padding: 0;
        border-bottom: none;
        text-align: left;
    }

    .nav-links a {
        font-size: clamp(0.85rem, 1.5vw, 1rem);
    }
}

/* Hero Section */
.hero {
    background: linear-gradient(135deg, #0d9488 0%, #14b8a6 100%);
    color: white;
    padding: clamp(100px, 15vw, 180px) clamp(15px, 4vw, 40px) clamp(60px, 10vw, 120px);
    text-align: center;
    margin-top: 65px;
    width: 100%;
}

.hero-content h1 {
    font-size: clamp(1.5rem, 5vw, 3.5rem);
    font-weight: 700;
    margin-bottom: 1.5rem;
    animation: fadeInUp 1s ease;
}

.tagline {
    font-size: clamp(0.95rem, 2vw, 1.4rem);
    margin-bottom: 2rem;
    opacity: 0.95;
    animation: fadeInUp 1s ease 0.2s backwards;
}

.cta-button {
    display: inline-block;
    padding: clamp(12px, 2vw, 16px) clamp(25px, 5vw, 45px);
    background-color: #f97316;
    color: white;
    text-decoration: none;
    border-radius: 8px;
    font-size: clamp(0.95rem, 1.5vw, 1.1rem);
    font-weight: 600;
    transition: transform 0.3s, box-shadow 0.3s, background-color 0.3s;
    animation: fadeInUp 1s ease 0.4s backwards;
}

.cta-button:hover {
    transform: translateY(-3px);
    background-color: #ea580c;
    box-shadow: 0 12px 24px rgba(249, 115, 22, 0.4);
}

/* Features Section */
.features-section {
    padding: clamp(40px, 8vw, 80px) clamp(15px, 4vw, 40px);
    background-color: #f8fafc;
    width: 100%;
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: clamp(0.8rem, 2vw, 2rem);
    max-width: 1200px;
    margin: 0 auto;
}

@media (min-width: 900px) {
    .features-grid {
        grid-template-columns: repeat(4, 1fr);
    }
}

.feature-box {
    background: white;
    padding: clamp(1.5rem, 3vw, 2.5rem) clamp(1rem, 2vw, 2rem);
    border-radius: 12px;
    text-align: center;
    box-shadow: 0 4px 6px rgba(0,0,0,0.07);
    transition: transform 0.3s, box-shadow 0.3s;
    border-top: 4px solid #14b8a6;
}

.feature-box:hover {
    transform: translateY(-8px);
    box-shadow: 0 12px 24px rgba(0,0,0,0.12);
}

.feature-icon {
    font-size: clamp(2rem, 4vw, 3rem);
    margin-bottom: 1rem;
    display: flex;
    justify-content: center;
    align-items: center;
    height: clamp(50px, 8vw, 80px);
    overflow: hidden;
}

.feature-box h3 {
    font-size: clamp(1rem, 1.8vw, 1.3rem);
    color: #1e293b;
    margin-bottom: 0.8rem;
    font-weight: 600;
}

.feature-box p {
    color: #64748b;
    font-size: clamp(0.85rem, 1.3vw, 0.95rem);
    line-height: 1.6;
}

/* About Section */
.about {
    padding: clamp(50px, 8vw, 100px) clamp(15px, 4vw, 40px);
    background-color: #ffffff;
}

.about h2 {
    text-align: center;
    font-size: clamp(1.8rem, 4vw, 2.8rem);
    margin-bottom: clamp(2rem, 4vw, 4rem);
    color: #1e293b;
    font-weight: 700;
}

.about-content {
    max-width: 1000px;
    margin: 0 auto;
    display: grid;
    grid-template-columns: 1fr;
    gap: clamp(2rem, 4vw, 4rem);
    align-items: center;
}

@media (min-width: 901px) {
    .about-content {
        grid-template-columns: 350px 1fr;
    }
}

.about-image {
    position: relative;
    text-align: center;
}

.about-image img {
    width: 100%;
    max-width: 350px;
    height: auto;
    border-radius: 16px;
    box-shadow: 0 12px 40px rgba(0,0,0,0.15);
    transition: transform 0.3s;
}

.about-image img:hover {
    transform: scale(1.03);
}

.about-text h3 {
    font-size: clamp(1.3rem, 2.5vw, 1.8rem);
    color: #14b8a6;
    margin-bottom: 1rem;
    font-weight: 600;
}

.about-text p {
    font-size: clamp(0.9rem, 1.5vw, 1.05rem);
    margin-bottom: 1.3rem;
    color: #475569;
    line-height: 1.8;
}

/* Videos Section */
.videos-section {
    padding: clamp(50px, 8vw, 100px) clamp(15px, 4vw, 40px);
    background-color: #f8fafc;
}

.videos-section h2 {
    text-align: center;
    font-size: clamp(1.8rem, 4vw, 2.8rem);
    margin-bottom: 1rem;
    color: #1e293b;
    font-weight: 700;
}

.videos-intro {
    text-align: center;
    font-size: clamp(0.9rem, 1.5vw, 1.1rem);
    color: #64748b;
    margin-bottom: clamp(1.5rem, 3vw, 3rem);
}

.videos-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(min(350px, 100%), 1fr));
    gap: clamp(1rem, 2vw, 2rem);
    max-width: 1100px;
    margin: 0 auto;
}

.video-card {
    background: white;
    border-radius: 12px;
    overflow: hidden;
    box-shadow: 0 8px 24px rgba(0,0,0,0.12);
    transition: transform 0.3s, box-shadow 0.3s;
}

.video-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 12px 32px rgba(0,0,0,0.18);
}

.video-wrapper {
    position: relative;
    padding-bottom: 56.25%;
    height: 0;
    overflow: hidden;
}

.video-wrapper iframe {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
}

.video-title {
    padding: clamp(0.7rem, 1.5vw, 1rem) clamp(1rem, 2vw, 1.5rem);
    font-size: clamp(0.9rem, 1.5vw, 1.1rem);
    color: #1e293b;
    font-weight: 600;
}

.youtube-channel-link {
    text-align: center;
    margin-top: clamp(1.5rem, 3vw, 3rem);
}

.youtube-button {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    padding: clamp(10px, 2vw, 16px) clamp(18px, 3vw, 32px);
    background-color: #ff0000;
    color: white;
    text-decoration: none;
    border-radius: 8px;
    font-size: clamp(0.9rem, 1.5vw, 1.1rem);
    font-weight: 600;
    transition: transform 0.3s, box-shadow 0.3s, background-color 0.3s;
}

.youtube-button:hover {
    background-color: #cc0000;
    transform: translateY(-3px);
    box-shadow: 0 8px 20px rgba(255, 0, 0, 0.3);
}

.yt-icon {
    font-size: 1.4rem;
}

/* Lessons Section */
.lessons {
    padding: clamp(50px, 8vw, 100px) clamp(15px, 4vw, 40px);
    background-color: #f8fafc;
}

.lessons h2 {
    text-align: center;
    font-size: clamp(1.8rem, 4vw, 2.8rem);
    margin-bottom: clamp(2rem, 4vw, 4rem);
    color: #1e293b;
    font-weight: 700;
}

.lesson-cards {
    display: grid;
    grid-template-columns: 1fr;
    gap: clamp(1rem, 2vw, 2rem);
    max-width: 1200px;
    margin: 0 auto;
}

@media (min-width: 901px) {
    .lesson-cards {
        grid-template-columns: repeat(3, 1fr);
    }
}

.card {
    background: white;
    border-radius: 12px;
    padding: clamp(1.5rem, 3vw, 2.5rem);
    box-shadow: 0 4px 6px rgba(0,0,0,0.07);
    transition: transform 0.3s, box-shadow 0.3s;
    border-left: 5px solid #94a3b8;
}

.card:hover {
    transform: translateY(-8px);
    box-shadow: 0 12px 30px rgba(0,0,0,0.12);
}

.card.featured {
    border-left: 5px solid #14b8a6;
    box-shadow: 0 8px 20px rgba(20, 184, 166, 0.2);
}

.card h3 {
    font-size: clamp(1.3rem, 2.5vw, 1.8rem);
    margin-bottom: 1rem;
    color: #0f172a;
    font-weight: 600;
}

.card p {
    margin-bottom: 1.2rem;
    color: #64748b;
}

.card ul {
    list-style: none;
    margin: 1.5rem 0;
}

.card ul li {
    padding: 0.7rem 0;
    color: #475569;
    border-bottom: 1px solid #e2e8f0;
    font-size: 0.95rem;
}

.card ul li:last-child {
    border-bottom: none;
}

.price {
    font-size: 1.5rem;
    font-weight: bold;
    color: #f97316;
    margin-top: 1.5rem;
}

.price-note {
    font-size: 0.9rem;
    font-style: italic;
    color: #14b8a6;
    margin-top: 1rem;
    font-weight: 500;
}

.probestunde {
    text-align: center;
    margin-top: clamp(1.5rem, 3vw, 3rem);
    padding: clamp(1.5rem, 3vw, 2.5rem);
    background: linear-gradient(135deg, #0d9488 0%, #14b8a6 100%);
    color: white;
    border-radius: 12px;
    box-shadow: 0 8px 24px rgba(20, 184, 166, 0.3);
}

.probestunde h3 {
    font-size: clamp(1.1rem, 2.5vw, 2rem);
    margin-bottom: 0.5rem;
    font-weight: 600;
}

.probestunde p {
    font-size: clamp(0.9rem, 1.5vw, 1.15rem);
    opacity: 0.95;
}

/* Contact Section */
.contact {
    padding: clamp(50px, 8vw, 100px) clamp(15px, 4vw, 40px);
    background: linear-gradient(135deg, #0f172a 0%, #1e293b 100%);
    color: white;
}

.contact h2 {
    text-align: center;
    font-size: clamp(1.8rem, 4vw, 2.8rem);
    margin-bottom: clamp(2rem, 4vw, 4rem);
    font-weight: 700;
}

.contact-content {
    display: grid;
    grid-template-columns: 1fr;
    gap: clamp(2rem, 3vw, 3rem);
    max-width: 1000px;
    margin: 0 auto;
}

@media (min-width: 901px) {
    .contact-content {
        grid-template-columns: 1fr 1fr;
    }
}

.contact-info h3 {
    font-size: clamp(1.2rem, 2vw, 1.6rem);
    margin-bottom: 1rem;
    font-weight: 600;
}

.trial-price {
    background-color: #14b8a6;
    color: white;
    padding: 0.8rem 1.2rem;
    border-radius: 8px;
    font-weight: 600;
    font-size: clamp(0.85rem, 1.5vw, 1.1rem);
    display: inline-block;
    margin-bottom: 1rem;
    box-shadow: 0 4px 12px rgba(20, 184, 166, 0.3);
}

.contact-info p {
    opacity: 0.9;
    line-height: 1.7;
}

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

.contact-details p {
    margin: 1.2rem 0;
    font-size: clamp(0.9rem, 1.5vw, 1.05rem);
}

.contact-details a {
    color: #14b8a6;
    text-decoration: none;
    border-bottom: 2px solid transparent;
    transition: border-color 0.3s;
    font-weight: 500;
    word-break: break-all;
}

.contact-details a:hover {
    border-bottom-color: #14b8a6;
}

.contact-form input,
.contact-form textarea {
    width: 100%;
    padding: clamp(10px, 1.5vw, 14px);
    margin-bottom: 1rem;
    border: 2px solid #334155;
    border-radius: 8px;
    font-size: 1rem;
    font-family: inherit;
    background-color: #1e293b;
    color: white;
    transition: border-color 0.3s;
}

.contact-form input:focus,
.contact-form textarea:focus {
    outline: none;
    border-color: #14b8a6;
}

.contact-form textarea {
    resize: vertical;
}

.submit-button {
    width: 100%;
    padding: clamp(12px, 2vw, 16px);
    background-color: #14b8a6;
    color: white;
    border: none;
    border-radius: 8px;
    font-size: clamp(0.95rem, 1.5vw, 1.1rem);
    font-weight: 600;
    cursor: pointer;
    transition: background-color 0.3s, transform 0.3s;
}

.submit-button:hover {
    background-color: #0d9488;
    transform: translateY(-2px);
}

/* Form Messages */
.form-message {
    padding: 1rem 1.5rem;
    border-radius: 8px;
    margin-bottom: 1.5rem;
    font-weight: 600;
    font-size: 1rem;
}

.form-message.success {
    background-color: #14b8a6;
    color: white;
}

.form-message.error {
    background-color: #ef4444;
    color: white;
}

/* Footer */
footer {
    background-color: #0a0f1a;
    color: #94a3b8;
    text-align: center;
    padding: clamp(1.2rem, 2vw, 2rem);
    font-size: clamp(0.8rem, 1.3vw, 1rem);
}

footer p {
    margin: 0.5rem 0;
}

.footer-links {
    margin-top: 1rem;
    font-size: clamp(0.75rem, 1.2vw, 0.9rem);
}

.footer-links a {
    color: #14b8a6;
    text-decoration: none;
    transition: color 0.3s;
    padding: 0 0.5rem;
}

.footer-links a:hover {
    color: #0d9488;
    text-decoration: underline;
}

/* Legal Pages */
.legal-page {
    padding: clamp(90px, 12vw, 120px) clamp(15px, 4vw, 40px) clamp(50px, 8vw, 80px);
    background-color: #ffffff;
    min-height: 80vh;
}

.legal-page h1 {
    font-size: clamp(1.6rem, 3.5vw, 2.5rem);
    color: #1e293b;
    margin-bottom: 2rem;
    padding-bottom: 1rem;
    border-bottom: 3px solid #14b8a6;
}

.legal-page h2 {
    font-size: clamp(1.3rem, 2.5vw, 1.8rem);
    color: #0f172a;
    margin-top: 2.5rem;
    margin-bottom: 1rem;
}

.legal-page p {
    font-size: clamp(0.9rem, 1.3vw, 1rem);
    line-height: 1.8;
    color: #475569;
    margin-bottom: 1.2rem;
}

.legal-page a {
    color: #14b8a6;
    text-decoration: none;
    border-bottom: 1px solid transparent;
    transition: border-color 0.3s;
}

.legal-page a:hover {
    border-bottom-color: #14b8a6;
}

/* Guitar Icon */
.guitar-icon {
    width: clamp(35px, 5vw, 50px);
    height: clamp(35px, 5vw, 50px);
    display: inline-block;
    vertical-align: middle;
    transition: transform 0.3s;
}

.guitar-icon:hover {
    transform: scale(1.1) rotate(5deg);
}

.logo .guitar-icon {
    width: clamp(25px, 3.5vw, 35px);
    height: clamp(25px, 3.5vw, 35px);
}

.feature-icon .guitar-icon {
    width: clamp(45px, 7vw, 70px);
    height: clamp(45px, 7vw, 70px);
}

/* Family Icon */
.family-icon {
    width: clamp(45px, 7vw, 70px) !important;
    height: clamp(45px, 7vw, 70px) !important;
    max-width: 70px !important;
    max-height: 70px !important;
    display: inline-block;
    vertical-align: middle;
    transition: transform 0.3s;
    object-fit: contain;
}

.family-icon:hover {
    transform: scale(1.1);
}

/* Musical Notes Animation */
.musical-note {
    position: fixed;
    font-size: 2rem;
    color: #14b8a6;
    pointer-events: none;
    z-index: 9999;
    animation: floatUp 2s ease-out forwards;
    font-weight: bold;
    text-shadow: 2px 2px 4px rgba(0,0,0,0.3);
}

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

@keyframes floatUp {
    0% {
        opacity: 1;
        transform: translateY(0) rotate(0deg);
    }
    50% {
        opacity: 0.8;
    }
    100% {
        opacity: 0;
        transform: translateY(-150px) rotate(360deg);
    }
}