:root {
    /* Color Palette Options: Premium & Trustworthy (Blue, Green, Gold) */
    --bg-dark: #0f172a;
    --bg-darker: #020617;
    --bg-card: rgba(30, 41, 59, 0.7);
    
    --primary: #2563eb;       /* Royal Blue */
    --primary-hover: #1d4ed8;
    --secondary: #10b981;     /* Emerald Green - represents growth/success */
    --accent: #f59e0b;        /* Gold/Amber - represents premium/victory */
    --warning: #ef4444;
    
    --text-main: #f8fafc;
    --text-muted: #94a3b8;
    --border: rgba(255, 255, 255, 0.1);
    
    /* Typography */
    --font-sans: 'Inter', sans-serif;
    --font-heading: 'Outfit', sans-serif;
    
    /* Transitions & Shadows */
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.05);
    --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.1), 0 2px 4px -2px rgb(0 0 0 / 0.1);
    --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.1), 0 4px 6px -4px rgb(0 0 0 / 0.1);
    --shadow-glow: 0 0 20px rgba(37, 99, 235, 0.5);
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-sans);
    background-color: var(--bg-darker);
    color: var(--text-main);
    line-height: 1.6;
    overflow-x: hidden;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 1.5rem;
}

/* Typography Enhancements */
h1, h2, h3, h4 {
    font-family: var(--font-heading);
    line-height: 1.2;
}

.text-gradient {
    background: linear-gradient(135deg, var(--secondary), var(--primary), var(--accent));
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
    display: inline-block;
}

.text-glow {
    text-shadow: 0 0 20px rgba(16, 185, 129, 0.4);
}

.section-title {
    font-size: 2.5rem;
    margin-bottom: 1rem;
}
.section-subtitle {
    color: var(--text-muted);
    font-size: 1.125rem;
    margin-bottom: 3rem;
}
.text-center { text-align: center; }

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    padding: 0.75rem 1.5rem;
    border-radius: 9999px;
    font-weight: 600;
    font-family: var(--font-heading);
    text-decoration: none;
    transition: var(--transition);
    border: none;
    cursor: pointer;
}

.btn-large {
    padding: 1rem 2rem;
    font-size: 1.125rem;
}

.btn-primary {
    background: linear-gradient(to right, var(--primary), var(--secondary));
    color: white;
    box-shadow: 0 4px 15px rgba(37, 99, 235, 0.3);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(16, 185, 129, 0.4);
    filter: brightness(1.1);
}

.btn-secondary {
    background: rgba(255, 255, 255, 0.1);
    color: white;
    backdrop-filter: blur(10px);
    border: 1px solid var(--border);
}

.btn-secondary:hover {
    background: rgba(255, 255, 255, 0.2);
    transform: translateY(-2px);
}

.whatsapp-btn {
    background: linear-gradient(to right, #25D366, #128C7E);
    box-shadow: 0 4px 15px rgba(37, 211, 102, 0.4);
}

/* Navbar */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 100;
    background: rgba(2, 6, 23, 0.8);
    backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--border);
    transition: var(--transition);
}

.nav-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 80px;
}

.logo {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-family: var(--font-heading);
    font-size: 1.5rem;
    font-weight: 800;
    color: white;
    text-decoration: none;
}
.logo span {
    color: var(--secondary);
}
.logo-icon {
    color: var(--primary);
}

.nav-links {
    display: flex;
    align-items: center;
    gap: 2rem;
}

.nav-links a:not(.btn) {
    color: var(--text-main);
    text-decoration: none;
    font-weight: 500;
    transition: var(--transition);
}

.nav-links a:not(.btn):hover {
    color: var(--secondary);
}

/* Hero Section */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    position: relative;
    padding-top: 80px;
    overflow: hidden;
}

.hero-bg-glow {
    position: absolute;
    top: -10%;
    right: -10%;
    width: 60vw;
    height: 60vw;
    background: radial-gradient(circle, rgba(37,99,235,0.15) 0%, rgba(16,185,129,0.05) 50%, rgba(2,6,23,0) 70%);
    border-radius: 50%;
    z-index: -1;
    pointer-events: none;
}

.hero-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    align-items: center;
}

.badge {
    display: inline-block;
    padding: 0.5rem 1rem;
    background: rgba(37, 99, 235, 0.1);
    color: var(--secondary);
    border: 1px solid rgba(16, 185, 129, 0.2);
    border-radius: 9999px;
    font-size: 0.875rem;
    font-weight: 600;
    margin-bottom: 1.5rem;
}

.hero-text h1 {
    font-size: 4rem;
    margin-bottom: 1.5rem;
}

.hero-text p {
    font-size: 1.25rem;
    color: var(--text-muted);
    margin-bottom: 2.5rem;
    max-width: 500px;
}

.hero-cta {
    display: flex;
    gap: 1rem;
}

/* Hero Visual & Floating Cards */
.hero-visual {
    position: relative;
    height: 400px;
}

.floating-card {
    position: absolute;
    background: var(--bg-card);
    backdrop-filter: blur(10px);
    border: 1px solid var(--border);
    border-radius: 1rem;
    padding: 1.5rem;
    display: flex;
    align-items: center;
    gap: 1rem;
    box-shadow: var(--shadow-lg);
    animation: float 6s ease-in-out infinite;
}

.card-1 {
    top: 20%;
    left: 10%;
    width: 320px;
}

.card-2 {
    bottom: 20%;
    right: 0;
    width: 280px;
    animation-delay: -3s;
}

.card-icon {
    width: 48px;
    height: 48px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
}

.card-info {
    display: flex;
    flex-direction: column;
}

.card-info strong {
    font-family: var(--font-heading);
    font-size: 1.1rem;
}

.card-info span {
    font-size: 0.875rem;
    color: var(--text-muted);
}

.card-wave {
    display: flex;
    gap: 3px;
    align-items: flex-end;
    height: 24px;
    margin-left: auto;
}

.card-wave span {
    width: 4px;
    background: var(--secondary);
    border-radius: 2px;
    animation: wave 1.2s ease-in-out infinite;
}
.card-wave span:nth-child(2) { animation-delay: 0.1s; height: 100%; }
.card-wave span:nth-child(3) { animation-delay: 0.2s; height: 70%; }
.card-wave span:nth-child(4) { animation-delay: 0.3s; height: 40%; }
.card-wave span:nth-child(5) { animation-delay: 0.4s; height: 80%; }
.card-wave span:nth-child(1) { height: 50%; }

@keyframes float {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-20px); }
}

@keyframes wave {
    0%, 100% { transform: scaleY(0.5); }
    50% { transform: scaleY(1); }
}

/* Features Section */
.features {
    padding: 6rem 0;
    background: var(--bg-dark);
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
    margin-top: 4rem;
}

.feature-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    padding: 2rem;
    border-radius: 1.5rem;
    transition: var(--transition);
}

.feature-card:hover {
    transform: translateY(-5px);
    border-color: var(--secondary);
    box-shadow: 0 10px 30px rgba(16, 185, 129, 0.1);
}

.feature-icon {
    width: 60px;
    height: 60px;
    border-radius: 1rem;
    background: rgba(37, 99, 235, 0.1);
    color: var(--primary);
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 1.5rem;
    box-shadow: inset 0 0 0 1px rgba(37, 99, 235, 0.2);
}
.feature-icon svg {
    width: 30px;
    height: 30px;
}

.feature-card h3 {
    font-size: 1.5rem;
    margin-bottom: 1rem;
}

.feature-card p {
    color: var(--text-muted);
}

/* Samples Section */
.samples {
    padding: 6rem 0;
}

.audio-players-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 2rem;
    max-width: 900px;
    margin: 0 auto;
}

.audio-player-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 1.5rem;
    padding: 1.5rem;
    display: flex;
    align-items: center;
    gap: 1.5rem;
    transition: var(--transition);
}

.audio-player-card:hover {
    border-color: rgba(255, 255, 255, 0.3);
}

.audio-cover {
    width: 80px;
    height: 80px;
    border-radius: 1rem;
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    flex-shrink: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
}
.audio-cover svg { width: 40px; height: 40px; }

.audio-details {
    flex-grow: 1;
}

.audio-details h4 {
    font-size: 1.25rem;
    margin-bottom: 0.25rem;
}

.audio-details p {
    font-size: 0.875rem;
    color: var(--text-muted);
    margin-bottom: 1rem;
}

/* Custom Audio Player */
.custom-player {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.play-btn {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background: var(--primary);
    color: white;
    border: none;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: var(--transition);
}

.play-btn:hover {
    transform: scale(1.1);
    background: var(--primary-hover);
}

.progress-container {
    flex-grow: 1;
    height: 6px;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 3px;
    cursor: pointer;
    position: relative;
    overflow: hidden;
}

.progress-bar {
    position: absolute;
    top: 0;
    left: 0;
    height: 100%;
    background: var(--secondary);
    width: 0%;
    transition: width 0.1s linear;
}

.time-display {
    font-size: 0.75rem;
    color: var(--text-muted);
    font-family: monospace;
    min-width: 70px;
    text-align: right;
}

/* CTA Section */
.cta-section {
    padding: 6rem 0;
    background: linear-gradient(to bottom, var(--bg-dark), var(--bg-darker));
}

.cta-container {
    position: relative;
}

.cta-content {
    background: linear-gradient(135deg, rgba(37,99,235,0.1), rgba(16,185,129,0.1));
    border: 1px solid var(--border);
    border-radius: 2rem;
    padding: 4rem 2rem;
    text-align: center;
    max-width: 800px;
    margin: 0 auto;
    position: relative;
    overflow: hidden;
    box-shadow: 0 20px 40px rgba(0,0,0,0.3);
}

.cta-content h2 {
    font-size: 3rem;
    margin-bottom: 1.5rem;
}

.cta-content p {
    font-size: 1.125rem;
    color: var(--text-muted);
    margin-bottom: 2.5rem;
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
}

.cta-decoration i {
    position: absolute;
    color: var(--accent);
    opacity: 0.5;
    animation: pulse 2s infinite alternate;
}
.star-1 { top: 10%; left: 15%; width: 40px; height: 40px; }
.star-2 { bottom: 20%; right: 10%; width: 30px; height: 30px; animation-delay: 0.5s; }
.star-3 { top: 30%; right: 20%; width: 20px; height: 20px; animation-delay: 1s; }

@keyframes pulse {
    0% { transform: scale(1); opacity: 0.5; }
    100% { transform: scale(1.2); opacity: 1; text-shadow: 0 0 10px var(--accent); }
}

/* Footer */
footer {
    border-top: 1px solid var(--border);
    padding: 4rem 0 2rem;
    background: var(--bg-darker);
}

.footer-content {
    display: flex;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: 3rem;
    margin-bottom: 3rem;
}

.footer-brand {
    max-width: 350px;
}

.footer-brand p {
    color: var(--text-muted);
    margin-top: 1rem;
}

.footer-links .link-group h4 {
    margin-bottom: 1rem;
    font-size: 1.125rem;
}

.footer-links .link-group a {
    display: block;
    color: var(--text-muted);
    text-decoration: none;
    margin-bottom: 0.5rem;
    transition: var(--transition);
}

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

.footer-bottom {
    text-align: center;
    color: var(--text-muted);
    font-size: 0.875rem;
    border-top: 1px solid var(--border);
    padding-top: 2rem;
}

/* Responsive Design */
@media (max-width: 992px) {
    .hero-content {
        grid-template-columns: 1fr;
        text-align: center;
    }
    
    .hero-text h1 {
        font-size: 3rem;
    }
    
    .hero-text p {
        margin-left: auto;
        margin-right: auto;
    }
    
    .hero-cta {
        justify-content: center;
    }
    
    .hero-visual {
        margin-top: 3rem;
        height: 300px;
    }
    
    .card-1 { left: 5%; width: 280px; }
    .card-2 { right: 5%; width: 250px; }
}

@media (max-width: 768px) {
    .nav-links {
        display: none; /* In a real app, add a hamburger menu */
    }
    
    .hero-text h1 {
        font-size: 2.5rem;
    }
    
    .hero-cta {
        flex-direction: column;
    }
    
    .cta-content h2 {
        font-size: 2rem;
    }
    
    .footer-content {
        flex-direction: column;
    }
}