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

:root {
    --primary: #6b4c9a;
    --primary-light: #9b7fcb;
    --primary-dark: #4a2d73;
    --accent: #f9a826;
    --accent-light: #ffd07b;
    --white: #ffffff;
    --off-white: #faf8ff;
    --light-bg: #f3edf9;
    --text: #333333;
    --text-light: #666666;
    --shadow: 0 4px 15px rgba(107, 76, 154, 0.15);
    --shadow-hover: 0 8px 25px rgba(107, 76, 154, 0.25);
    --radius: 12px;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    color: var(--text);
    line-height: 1.6;
}

.container {
    max-width: 1100px;
    margin: 0 auto;
    padding: 0 20px;
}

h2 {
    font-size: 2.2rem;
    color: var(--primary-dark);
    text-align: center;
    margin-bottom: 10px;
}

.section-subtitle {
    text-align: center;
    color: var(--text-light);
    margin-bottom: 40px;
    font-size: 1.1rem;
}

/* === Header / Nav === */
header {
    position: fixed;
    top: 0;
    width: 100%;
    background: var(--white);
    box-shadow: 0 2px 10px rgba(0,0,0,0.08);
    z-index: 1000;
}

nav {
    max-width: 1100px;
    margin: 0 auto;
    padding: 15px 20px;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    font-size: 1.4rem;
    font-weight: 700;
    color: var(--primary);
}

.nav-links {
    list-style: none;
    display: flex;
    gap: 30px;
}

.nav-links a {
    text-decoration: none;
    color: var(--text);
    font-weight: 500;
    transition: color 0.3s;
}

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

.mobile-menu-btn {
    display: none;
    background: none;
    border: none;
    font-size: 1.5rem;
    cursor: pointer;
    color: var(--primary);
}

/* === Hero === */
.hero {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    text-align: center;
    padding: 120px 20px 60px;
    background: linear-gradient(135deg, var(--light-bg) 0%, var(--off-white) 50%, #fff8ee 100%);
}

.hero-content h1 {
    font-size: 3rem;
    color: var(--primary-dark);
    margin-bottom: 20px;
    line-height: 1.2;
}

.hero-content p {
    font-size: 1.2rem;
    color: var(--text-light);
    max-width: 600px;
    margin: 0 auto 30px;
}

.btn {
    display: inline-block;
    background: var(--accent);
    color: var(--white);
    padding: 14px 32px;
    border: none;
    border-radius: 50px;
    font-size: 1.05rem;
    font-weight: 600;
    text-decoration: none;
    cursor: pointer;
    transition: transform 0.2s, box-shadow 0.2s, background 0.2s;
    box-shadow: 0 4px 12px rgba(249, 168, 38, 0.3);
}

.btn:hover {
    transform: translateY(-2px);
    background: #e8971e;
    box-shadow: 0 6px 18px rgba(249, 168, 38, 0.4);
}

/* Piano visual */
.hero-keys {
    margin-top: 50px;
}

.piano-visual {
    display: flex;
    position: relative;
    height: 100px;
    gap: 2px;
}

.key.white {
    width: 40px;
    height: 100px;
    background: white;
    border: 1px solid #ddd;
    border-radius: 0 0 6px 6px;
    box-shadow: 0 4px 8px rgba(0,0,0,0.1);
}

.key.black {
    width: 26px;
    height: 60px;
    background: var(--primary-dark);
    border-radius: 0 0 4px 4px;
    margin: 0 -14px;
    z-index: 1;
    box-shadow: 0 4px 6px rgba(0,0,0,0.3);
}

/* === About === */
.about {
    padding: 80px 0;
    background: var(--white);
}

.about-content {
    display: flex;
    gap: 50px;
    align-items: center;
    margin-top: 40px;
}

.about-image {
    flex-shrink: 0;
}

.about-image img {
    width: 250px;
    height: 300px;
    object-fit: cover;
    border-radius: var(--radius);
    box-shadow: var(--shadow);
}

.about-text p {
    margin-bottom: 15px;
    color: var(--text-light);
}

.credentials {
    list-style: none;
    margin-top: 20px;
}

.credentials li {
    padding: 6px 0 6px 28px;
    position: relative;
    color: var(--text);
}

.credentials li::before {
    content: "\2713";
    position: absolute;
    left: 0;
    color: var(--accent);
    font-weight: 700;
    font-size: 1.1rem;
}

/* === Lessons === */
.lessons {
    padding: 80px 0;
    background: var(--light-bg);
}

.lesson-cards {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 30px;
    margin-top: 20px;
}

.card {
    background: var(--white);
    padding: 35px 25px;
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    transition: transform 0.3s, box-shadow 0.3s;
    position: relative;
}

.card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-hover);
}

.card.featured {
    border: 2px solid var(--accent);
}

.card-badge {
    position: absolute;
    top: -12px;
    right: 20px;
    background: var(--accent);
    color: white;
    padding: 4px 14px;
    border-radius: 20px;
    font-size: 0.8rem;
    font-weight: 600;
}

.card-icon {
    font-size: 2.5rem;
    margin-bottom: 15px;
}

.card h3 {
    color: var(--primary-dark);
    margin-bottom: 12px;
    font-size: 1.3rem;
}

.card p {
    color: var(--text-light);
    margin-bottom: 15px;
    font-size: 0.95rem;
}

.card ul {
    list-style: none;
}

.card ul li {
    padding: 4px 0 4px 20px;
    position: relative;
    font-size: 0.9rem;
    color: var(--text-light);
}

.card ul li::before {
    content: "\266A";
    position: absolute;
    left: 0;
    color: var(--primary-light);
}

/* === Testimonials === */
.testimonials {
    padding: 80px 0;
    background: var(--white);
}

.testimonial-cards {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 30px;
    margin-top: 40px;
}

.testimonial {
    background: var(--off-white);
    padding: 30px;
    border-radius: var(--radius);
    border-left: 4px solid var(--primary-light);
}

.quote {
    font-style: italic;
    color: var(--text-light);
    margin-bottom: 15px;
    line-height: 1.7;
}

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

/* === Contact === */
.contact {
    padding: 80px 0;
    background: var(--light-bg);
}

.contact-content {
    display: grid;
    grid-template-columns: 1.2fr 0.8fr;
    gap: 50px;
    margin-top: 40px;
}

.contact-form {
    background: var(--white);
    padding: 35px;
    border-radius: var(--radius);
    box-shadow: var(--shadow);
}

.form-group {
    margin-bottom: 18px;
}

.form-group label {
    display: block;
    margin-bottom: 6px;
    font-weight: 500;
    color: var(--text);
    font-size: 0.95rem;
}

.form-group input,
.form-group textarea {
    width: 100%;
    padding: 10px 14px;
    border: 1px solid #ddd;
    border-radius: 8px;
    font-size: 1rem;
    font-family: inherit;
    transition: border-color 0.3s;
}

.form-group input:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--primary-light);
    box-shadow: 0 0 0 3px rgba(155, 127, 203, 0.15);
}

.contact-info {
    display: flex;
    flex-direction: column;
    gap: 25px;
    padding-top: 10px;
}

.info-item h3 {
    color: var(--primary-dark);
    margin-bottom: 8px;
    font-size: 1.1rem;
}

.info-item p {
    color: var(--text-light);
    line-height: 1.8;
}

.map-embed {
    margin-top: 12px;
}

.map-embed iframe {
    box-shadow: var(--shadow);
}

/* === Footer === */
footer {
    background: var(--primary-dark);
    color: rgba(255,255,255,0.7);
    text-align: center;
    padding: 25px 20px;
    font-size: 0.9rem;
}

/* === Responsive === */
@media (max-width: 768px) {
    .mobile-menu-btn {
        display: block;
    }

    .nav-links {
        display: none;
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        flex-direction: column;
        background: var(--white);
        padding: 20px;
        gap: 15px;
        box-shadow: 0 4px 10px rgba(0,0,0,0.1);
    }

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

    .hero-content h1 {
        font-size: 2rem;
    }

    .about-content {
        flex-direction: column;
        text-align: center;
    }

    .lesson-cards,
    .testimonial-cards {
        grid-template-columns: 1fr;
    }

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

    .piano-visual {
        transform: scale(0.8);
    }
}