/* ===========================
   CSS Reset & Base Styles
   =========================== */

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

:root {
    --color-black: #000000;
    --color-white: #FFFFFF;
    --color-gray-light: #F5F5F5;
    --color-gray: #CCCCCC;
    --color-gray-dark: #666666;
    
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 2rem;
    --spacing-lg: 4rem;
    --spacing-xl: 6rem;
    
    --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    --font-mono: "SF Mono", Monaco, "Cascadia Code", "Roboto Mono", Consolas, "Courier New", monospace;
    
    --line-height-tight: 1.2;
    --line-height-normal: 1.6;
    --line-height-relaxed: 1.8;
    
    --border-thin: 1px;
    --border-medium: 2px;
    
    --transition-fast: 0.2s ease;
    --transition-normal: 0.3s ease;
}

html {
    font-size: 16px;
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-sans);
    line-height: var(--line-height-normal);
    color: var(--color-black);
    background-color: var(--color-white);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* ===========================
   Typography
   =========================== */

h1, h2, h3, h4, h5, h6 {
    font-weight: 400;
    line-height: var(--line-height-tight);
    margin-bottom: var(--spacing-md);
}

h1 {
    font-size: clamp(2.5rem, 5vw, 4rem);
    letter-spacing: -0.02em;
}

h2 {
    font-size: clamp(2rem, 4vw, 3rem);
    letter-spacing: -0.01em;
}

h3 {
    font-size: clamp(1.5rem, 3vw, 2rem);
}

h4 {
    font-size: 1.25rem;
    font-weight: 500;
}

p {
    margin-bottom: var(--spacing-sm);
    font-size: 1.125rem;
    line-height: var(--line-height-relaxed);
}

a {
    color: var(--color-black);
    text-decoration: none;
    transition: opacity var(--transition-fast);
}

a:hover {
    opacity: 0.6;
}

/* ===========================
   Layout
   =========================== */

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-md);
}

section {
    padding: var(--spacing-xl) 0;
    border-bottom: var(--border-thin) solid var(--color-gray);
}

section:last-of-type {
    border-bottom: none;
}

/* ===========================
   Header
   =========================== */

.main-header {
    position: sticky;
    top: 0;
    background-color: var(--color-white);
    border-bottom: var(--border-thin) solid var(--color-black);
    z-index: 1000;
    padding: var(--spacing-sm) 0;
}

.header-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    font-weight: 500;
    font-size: 1.25rem;
    letter-spacing: 0.05em;
}

.logo svg {
    width: 40px;
    height: 40px;
}

.main-nav ul {
    display: flex;
    list-style: none;
    gap: var(--spacing-md);
}

.main-nav a {
    font-size: 0.95rem;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    font-weight: 400;
    position: relative;
}

.main-nav a::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 0;
    height: var(--border-thin);
    background-color: var(--color-black);
    transition: width var(--transition-normal);
}

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

.mobile-menu-toggle {
    display: none;
    flex-direction: column;
    gap: 4px;
    background: none;
    border: none;
    cursor: pointer;
    padding: var(--spacing-xs);
}

.mobile-menu-toggle span {
    width: 24px;
    height: 2px;
    background-color: var(--color-black);
    transition: var(--transition-normal);
}

/* ===========================
   Hero Section
   =========================== */

.hero {
    min-height: 70vh;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    border-bottom: var(--border-thin) solid var(--color-black);
    background: linear-gradient(to bottom, var(--color-white) 0%, var(--color-gray-light) 100%);
}

.hero-content {
    max-width: 900px;
}

.hero h1 {
    margin-bottom: var(--spacing-md);
}

.subtitle {
    font-size: 1.5rem;
    color: var(--color-gray-dark);
    font-weight: 300;
    letter-spacing: 0.05em;
}

/* ===========================
   Problem Section
   =========================== */

.problem-section {
    text-align: center;
    background-color: var(--color-gray-light);
}

.stat-circle {
    display: flex;
    justify-content: center;
    margin-bottom: var(--spacing-lg);
}

.circle {
    width: 200px;
    height: 200px;
    border: 20px solid var(--color-black);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
}

.circle::before {
    content: '';
    position: absolute;
    top: -20px;
    right: -20px;
    width: 60px;
    height: 240px;
    background-color: var(--color-gray-light);
    transform: rotate(15deg);
}

.percentage {
    font-size: 4rem;
    font-weight: 300;
    z-index: 1;
}

.problem-section h2 {
    max-width: 700px;
    margin: 0 auto var(--spacing-md);
}

.problem-section p {
    max-width: 600px;
    margin: 0 auto var(--spacing-sm);
}

.emphasis {
    font-size: 1.5rem;
    font-weight: 500;
    margin-top: var(--spacing-lg) !important;
}

/* ===========================
   Solution Section
   =========================== */

.solution-section {
    background-color: var(--color-white);
}

.solution-section .intro {
    max-width: 800px;
    margin: 0 auto var(--spacing-lg);
    text-align: center;
    font-size: 1.25rem;
}

.features {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--spacing-lg);
    margin-top: var(--spacing-xl);
}

.feature {
    text-align: center;
    padding: var(--spacing-md);
    border: var(--border-thin) solid var(--color-gray);
    transition: var(--transition-normal);
}

.feature:hover {
    border-color: var(--color-black);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
}

.feature .icon {
    font-size: 3rem;
    margin-bottom: var(--spacing-sm);
}

.feature h3 {
    font-size: 1.25rem;
    margin-bottom: var(--spacing-sm);
}

.feature p {
    font-size: 1rem;
    color: var(--color-gray-dark);
}

/* ===========================
   Audio Section
   =========================== */

.audio-section {
    background-color: var(--color-gray-light);
    text-align: center;
}

.audio-section h2 {
    margin-bottom: var(--spacing-sm);
}

.audio-section > .container > p {
    max-width: 600px;
    margin: 0 auto var(--spacing-lg);
    color: var(--color-gray-dark);
}

.audio-players {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--spacing-md);
    margin-top: var(--spacing-lg);
}

.audio-player {
    background-color: var(--color-white);
    padding: var(--spacing-md);
    border: var(--border-thin) solid var(--color-gray);
    text-align: center;
    transition: var(--transition-normal);
}

.audio-player:hover {
    border-color: var(--color-black);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
}

.player-icon {
    font-size: 2.5rem;
    margin-bottom: var(--spacing-sm);
}

.audio-player h3 {
    font-size: 1rem;
    margin-bottom: var(--spacing-md);
    font-weight: 500;
}

.audio-player audio {
    width: 100%;
    height: 40px;
    outline: none;
}

/* Custom Audio Player Styling */
audio::-webkit-media-controls-panel {
    background-color: var(--color-white);
    border: var(--border-thin) solid var(--color-gray);
}

audio::-webkit-media-controls-play-button {
    background-color: var(--color-black);
    border-radius: 50%;
}

/* ===========================
   Four Pillars Section
   =========================== */

.pillars-section {
    background-color: var(--color-white);
}

.pillars-section h2 {
    text-align: center;
    margin-bottom: var(--spacing-xl);
}

.pillars-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: var(--spacing-lg);
}

.pillar {
    padding: var(--spacing-lg);
    border: var(--border-thin) solid var(--color-gray);
    text-align: center;
    transition: var(--transition-normal);
    position: relative;
}

.pillar::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 0;
    height: var(--border-medium);
    background-color: var(--color-black);
    transition: width var(--transition-normal);
}

.pillar:hover::before {
    width: 100%;
}

.pillar:hover {
    border-color: var(--color-black);
}

.pillar-icon {
    font-size: 3rem;
    margin-bottom: var(--spacing-md);
}

.pillar h3 {
    font-size: 1.5rem;
    margin-bottom: var(--spacing-sm);
}

.pillar p {
    font-size: 1rem;
    color: var(--color-gray-dark);
    line-height: var(--line-height-relaxed);
}

/* ===========================
   USP Section
   =========================== */

.usp-section {
    background-color: var(--color-gray-light);
}

.usp-section h2 {
    text-align: center;
    margin-bottom: var(--spacing-xl);
}

.usp-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-xl);
    align-items: center;
}

.usp-image {
    position: relative;
}

.visual-element {
    width: 100%;
    height: 300px;
    border: var(--border-thin) solid var(--color-black);
    display: flex;
    align-items: center;
    justify-content: center;
    background-color: var(--color-white);
}

.waveform {
    width: 80%;
    height: 80px;
    background: 
        linear-gradient(var(--color-black) 2px, transparent 2px),
        linear-gradient(90deg, var(--color-black) 2px, transparent 2px);
    background-size: 20px 20px;
    position: relative;
}

.waveform::before {
    content: '';
    position: absolute;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, 
        transparent 0%, 
        transparent 10%,
        var(--color-black) 10%,
        var(--color-black) 12%,
        transparent 12%,
        transparent 25%,
        var(--color-black) 25%,
        var(--color-black) 28%,
        transparent 28%,
        transparent 40%,
        var(--color-black) 40%,
        var(--color-black) 45%,
        transparent 45%,
        transparent 60%,
        var(--color-black) 60%,
        var(--color-black) 62%,
        transparent 62%,
        transparent 75%,
        var(--color-black) 75%,
        var(--color-black) 80%,
        transparent 80%,
        transparent 100%
    );
}

.usp-text h3 {
    font-size: 2rem;
    margin-bottom: var(--spacing-md);
    line-height: var(--line-height-tight);
}

.usp-text p {
    font-size: 1.25rem;
    margin-bottom: var(--spacing-md);
}

/* ===========================
   CTA Section
   =========================== */

.cta-section {
    text-align: center;
    background-color: var(--color-black);
    color: var(--color-white);
    padding: var(--spacing-xl) 0;
}

.cta-section h2 {
    color: var(--color-white);
    margin-bottom: var(--spacing-sm);
}

.cta-section p {
    color: var(--color-gray);
    margin-bottom: var(--spacing-lg);
    font-size: 1.25rem;
}

.cta-buttons {
    display: flex;
    gap: var(--spacing-md);
    justify-content: center;
    flex-wrap: wrap;
}

.btn {
    padding: 1rem 2.5rem;
    font-size: 1rem;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    border: var(--border-medium) solid var(--color-white);
    cursor: pointer;
    transition: var(--transition-normal);
    display: inline-block;
    font-weight: 500;
}

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

.btn-primary:hover {
    background-color: transparent;
    color: var(--color-white);
    opacity: 1;
}

.btn-secondary {
    background-color: transparent;
    color: var(--color-white);
}

.btn-secondary:hover {
    background-color: var(--color-white);
    color: var(--color-black);
    opacity: 1;
}

/* ===========================
   Footer
   =========================== */

.main-footer {
    background-color: var(--color-black);
    color: var(--color-white);
    padding: var(--spacing-xl) 0 var(--spacing-md);
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: var(--spacing-lg);
    margin-bottom: var(--spacing-lg);
    padding-bottom: var(--spacing-lg);
    border-bottom: var(--border-thin) solid var(--color-gray-dark);
}

.footer-column h4 {
    margin-bottom: var(--spacing-sm);
    font-size: 0.9rem;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    font-weight: 500;
}

.footer-column ul {
    list-style: none;
}

.footer-column ul li {
    margin-bottom: var(--spacing-xs);
}

.footer-column a {
    color: var(--color-gray);
    font-size: 0.95rem;
    transition: color var(--transition-fast);
}

.footer-column a:hover {
    color: var(--color-white);
    opacity: 1;
}

.footer-logo {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    font-weight: 500;
    font-size: 1.25rem;
    margin-bottom: var(--spacing-sm);
    letter-spacing: 0.05em;
}

.footer-logo svg {
    width: 40px;
    height: 40px;
}

.footer-tagline {
    color: var(--color-gray);
    font-size: 0.9rem;
    line-height: var(--line-height-relaxed);
}

.newsletter-form {
    display: flex;
    margin-top: var(--spacing-sm);
    margin-bottom: var(--spacing-md);
}

.newsletter-form input {
    flex: 1;
    padding: 0.75rem;
    border: var(--border-thin) solid var(--color-gray-dark);
    background-color: transparent;
    color: var(--color-white);
    font-family: var(--font-sans);
    font-size: 0.95rem;
}

.newsletter-form input::placeholder {
    color: var(--color-gray-dark);
}

.newsletter-form button {
    padding: 0.75rem 1.5rem;
    background-color: var(--color-white);
    color: var(--color-black);
    border: none;
    cursor: pointer;
    font-size: 1.25rem;
    transition: var(--transition-normal);
}

.newsletter-form button:hover {
    background-color: var(--color-gray);
}

.social-links {
    display: flex;
    gap: var(--spacing-sm);
}

.social-links a {
    width: 40px;
    height: 40px;
    border: var(--border-thin) solid var(--color-gray-dark);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--color-white);
    transition: var(--transition-normal);
}

.social-links a:hover {
    border-color: var(--color-white);
    background-color: var(--color-white);
    color: var(--color-black);
    opacity: 1;
}

.footer-bottom {
    padding-top: var(--spacing-md);
}

.footer-legal {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: var(--spacing-sm);
}

.footer-legal p {
    color: var(--color-gray-dark);
    font-size: 0.85rem;
    margin: 0;
}

.footer-links {
    display: flex;
    gap: var(--spacing-md);
}

.footer-links a {
    color: var(--color-gray-dark);
    font-size: 0.85rem;
}

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

/* ===========================
   Responsive Design
   =========================== */

@media (max-width: 768px) {
    .mobile-menu-toggle {
        display: flex;
    }
    
    .main-nav {
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        background-color: var(--color-white);
        border-top: var(--border-thin) solid var(--color-black);
        border-bottom: var(--border-thin) solid var(--color-black);
        max-height: 0;
        overflow: hidden;
        transition: max-height var(--transition-normal);
    }
    
    .main-nav.active {
        max-height: 400px;
    }
    
    .main-nav ul {
        flex-direction: column;
        padding: var(--spacing-md);
    }
    
    .main-nav a::after {
        display: none;
    }
    
    .usp-content {
        grid-template-columns: 1fr;
    }
    
    .pillars-grid {
        grid-template-columns: 1fr;
    }
    
    .footer-legal {
        flex-direction: column;
        text-align: center;
    }
    
    h1 {
        font-size: 2rem;
    }
    
    h2 {
        font-size: 1.75rem;
    }
}

@media (max-width: 480px) {
    :root {
        --spacing-lg: 3rem;
        --spacing-xl: 4rem;
    }
    
    .features {
        grid-template-columns: 1fr;
    }
    
    .audio-players {
        grid-template-columns: 1fr;
    }
    
    .cta-buttons {
        flex-direction: column;
    }
    
    .btn {
        width: 100%;
    }
}

/* ===========================
   Utility Classes
   =========================== */

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

.mb-0 { margin-bottom: 0; }
.mb-1 { margin-bottom: var(--spacing-xs); }
.mb-2 { margin-bottom: var(--spacing-sm); }
.mb-3 { margin-bottom: var(--spacing-md); }
.mb-4 { margin-bottom: var(--spacing-lg); }

.mt-0 { margin-top: 0; }
.mt-1 { margin-top: var(--spacing-xs); }
.mt-2 { margin-top: var(--spacing-sm); }
.mt-3 { margin-top: var(--spacing-md); }
.mt-4 { margin-top: var(--spacing-lg); }

/* ===========================
   Animations
   =========================== */

@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.fade-in {
    animation: fadeIn 0.6s ease-out;
}

/* ===========================
   Print Styles
   =========================== */

@media print {
    .main-header,
    .main-footer,
    .cta-section,
    .mobile-menu-toggle {
        display: none;
    }
    
    body {
        color: var(--color-black);
        background: var(--color-white);
    }
    
    a {
        text-decoration: underline;
    }
}