/* ==========================================================================
   CSS Custom Properties
   ========================================================================== */
:root {
    /* Colors - Monochrome palette */
    --color-bg: #0a0a0a;
    --color-bg-alt: #111111;
    --color-surface: #1a1a1a;
    --color-text: #ffffff;
    --color-text-secondary: #999999;
    --color-text-muted: #666666;
    --color-border: #222222;
    --color-overlay: rgba(0, 0, 0, 0.55);

    /* Typography */
    --font-primary: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    --font-display: 'Space Grotesk', 'Inter', -apple-system, sans-serif;

    /* Responsive typography using clamp() */
    --font-size-xs: clamp(0.7rem, 1.5vw, 0.75rem);
    --font-size-sm: clamp(0.8rem, 2vw, 0.875rem);
    --font-size-base: clamp(0.9rem, 2.5vw, 1rem);
    --font-size-md: clamp(1rem, 3vw, 1.25rem);
    --font-size-lg: clamp(1.25rem, 4vw, 1.75rem);
    --font-size-xl: clamp(1.5rem, 5vw, 2.5rem);
    --font-size-2xl: clamp(2rem, 7vw, 4rem);
    --font-size-3xl: clamp(2.5rem, 9vw, 5rem);
    --font-size-4xl: clamp(3rem, 12vw, 7rem);
    --font-size-5xl: clamp(3.5rem, 15vw, 9rem);

    /* Spacing */
    --spacing-xs: clamp(0.5rem, 1.5vw, 0.75rem);
    --spacing-sm: clamp(1rem, 3vw, 1.5rem);
    --spacing-md: clamp(1.5rem, 5vw, 3rem);
    --spacing-lg: clamp(2rem, 8vw, 5rem);
    --spacing-xl: clamp(3rem, 10vw, 7rem);
    --spacing-2xl: clamp(4rem, 15vw, 10rem);

    /* Transitions */
    --transition-fast: 0.25s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-base: 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-slow: 0.7s cubic-bezier(0.4, 0, 0.2, 1);

    /* Safe area insets */
    --safe-top: env(safe-area-inset-top, 0px);
    --safe-bottom: env(safe-area-inset-bottom, 0px);
    --safe-left: env(safe-area-inset-left, 0px);
    --safe-right: env(safe-area-inset-right, 0px);
}

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

html {
    scroll-behavior: smooth;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    -webkit-text-size-adjust: 100%;
    text-size-adjust: 100%;
}

body {
    font-family: var(--font-primary);
    font-size: var(--font-size-base);
    color: var(--color-text);
    background-color: var(--color-bg);
    line-height: 1.5;
    overflow-x: hidden;
    width: 100%;
    max-width: 100%;
    position: relative;
    -webkit-tap-highlight-color: transparent;
}

/* ==========================================================================
   Typography
   ========================================================================== */
h1,
h2,
h3,
h4,
h5,
h6 {
    font-family: var(--font-display);
    font-weight: 300;
    line-height: 1.1;
    letter-spacing: -0.02em;
    color: var(--color-text);
}

a {
    text-decoration: none;
    color: inherit;
    transition: var(--transition-base);
    -webkit-tap-highlight-color: transparent;
}

img {
    max-width: 100%;
    height: auto;
    display: block;
}

/* ==========================================================================
   Navigation
   ========================================================================== */
.nav {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    padding: var(--spacing-sm) 0;
    padding-top: calc(var(--spacing-sm) + var(--safe-top));
    transition: background-color var(--transition-base);
}

.nav.scrolled {
    background: rgba(10, 10, 10, 0.95);
    -webkit-backdrop-filter: blur(10px);
    backdrop-filter: blur(10px);
}

.nav-inner {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 var(--spacing-md);
    padding-left: max(var(--spacing-md), var(--safe-left));
    padding-right: max(var(--spacing-md), var(--safe-right));
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: var(--spacing-sm);
}

.nav-brand {
    font-family: var(--font-display);
    font-size: var(--font-size-sm);
    font-weight: 400;
    letter-spacing: 0.2em;
    color: var(--color-text);
    white-space: nowrap;
}

.nav-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 8px;
    z-index: 1001;
}

.nav-toggle span {
    width: 22px;
    height: 1.5px;
    background: var(--color-text);
    transition: var(--transition-base);
    display: block;
}

.nav-toggle.active span:nth-child(1) {
    transform: rotate(45deg) translate(4px, 4px);
}

.nav-toggle.active span:nth-child(2) {
    transform: rotate(-45deg) translate(4px, -4px);
}

.nav-menu {
    display: flex;
    gap: var(--spacing-md);
    align-items: center;
    list-style: none;
}

.nav-menu a {
    font-size: var(--font-size-xs);
    font-weight: 400;
    letter-spacing: 0.15em;
    text-transform: uppercase;
    color: var(--color-text-secondary);
    transition: color var(--transition-fast);
    padding-bottom: 2px;
    border-bottom: 1px solid transparent;
}

.nav-menu a:hover {
    color: var(--color-text);
    border-bottom-color: var(--color-text);
}

/* ==========================================================================
   Hero Section
   ========================================================================== */
.hero {
    min-height: 100vh;
    min-height: 100dvh;
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    background: var(--color-bg);
    overflow: hidden;
    padding: var(--spacing-xl) var(--spacing-md);
    padding-top: calc(var(--spacing-xl) + var(--safe-top));
    padding-bottom: calc(var(--spacing-xl) + var(--safe-bottom));
}

.hero-inner {
    text-align: center;
    width: 100%;
    max-width: 800px;
    margin: 0 auto;
}

.hero-identity {
    font-size: var(--font-size-xs);
    font-weight: 400;
    letter-spacing: 0.3em;
    text-transform: uppercase;
    color: var(--color-text-secondary);
    margin-bottom: var(--spacing-sm);
}

.hero-name {
    font-size: var(--font-size-4xl);
    font-weight: 300;
    letter-spacing: 0.05em;
    margin-bottom: var(--spacing-sm);
    color: var(--color-text);
    line-height: 1;
}

.hero-tagline {
    font-size: var(--font-size-md);
    font-weight: 300;
    color: var(--color-text-secondary);
    margin-bottom: var(--spacing-lg);
    letter-spacing: 0.02em;
}

.hero-cta {
    display: inline-block;
    padding: var(--spacing-xs) var(--spacing-lg);
    font-size: var(--font-size-xs);
    font-weight: 400;
    letter-spacing: 0.25em;
    text-transform: uppercase;
    color: var(--color-text);
    border: 1px solid var(--color-border);
    background: transparent;
    cursor: pointer;
    transition: all var(--transition-base);
}

.hero-cta:hover {
    border-color: var(--color-text);
    background: rgba(255, 255, 255, 0.03);
    letter-spacing: 0.3em;
}

/* ==========================================================================
   World Sections (Piano & DJ)
   ========================================================================== */
.world-section {
    min-height: 100vh;
    min-height: 100dvh;
    display: flex;
    align-items: center;
    position: relative;
    overflow: hidden;
    background: var(--color-bg-alt);
    padding: var(--spacing-xl) var(--spacing-md);
    padding-left: max(var(--spacing-md), var(--safe-left));
    padding-right: max(var(--spacing-md), var(--safe-right));
}

.world-bg {
    position: absolute;
    top: -10%;
    left: 0;
    width: 100%;
    height: 120%;
    z-index: 1;
    will-change: transform;
    pointer-events: none;
}

.world-image {
    width: 100%;
    height: 100%;
    object-fit: cover;
    object-position: center;
    filter: grayscale(10%) contrast(1.05) brightness(0.85);
    opacity: 0.7;
    transition: transform var(--transition-slow), opacity var(--transition-slow);
    will-change: transform;
}

.world-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(to bottom,
            rgba(10, 10, 10, 0.4) 0%,
            rgba(10, 10, 10, 0.6) 50%,
            rgba(10, 10, 10, 0.8) 100%);
    z-index: 2;
}

.world-content {
    position: relative;
    z-index: 3;
    width: 100%;
    max-width: 600px;
    text-align: left;
}

.piano-section .world-content {
    margin-left: 5%;
}

.dj-section .world-content {
    margin-left: 55%;
}

.world-title {
    font-size: var(--font-size-5xl);
    font-weight: 300;
    letter-spacing: -0.02em;
    margin-bottom: var(--spacing-xs);
    color: var(--color-text);
    line-height: 1;
}

.world-tagline {
    font-size: var(--font-size-lg);
    font-weight: 300;
    color: var(--color-text);
    margin-bottom: var(--spacing-xs);
    letter-spacing: -0.01em;
}

.world-details {
    font-size: var(--font-size-xs);
    letter-spacing: 0.15em;
    text-transform: uppercase;
    color: var(--color-text-secondary);
    margin-bottom: var(--spacing-md);
}

.btn-world {
    display: inline-block;
    padding: var(--spacing-xs) 0;
    font-size: var(--font-size-sm);
    font-weight: 400;
    letter-spacing: 0.08em;
    color: var(--color-text);
    border-bottom: 1px solid var(--color-text-secondary);
    transition: all var(--transition-base);
}

.btn-world:hover {
    letter-spacing: 0.15em;
    border-bottom-color: var(--color-text);
}

/* ==========================================================================
   About Section
   ========================================================================== */
.about {
    min-height: 60vh;
    min-height: 60dvh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: var(--spacing-xl) var(--spacing-md);
    padding-left: max(var(--spacing-md), var(--safe-left));
    padding-right: max(var(--spacing-md), var(--safe-right));
    background: var(--color-bg);
}

.about-inner {
    text-align: center;
    width: 100%;
    max-width: 600px;
    margin: 0 auto;
}

.about-name {
    font-size: var(--font-size-3xl);
    font-weight: 300;
    letter-spacing: 0.05em;
    margin-bottom: var(--spacing-md);
    color: var(--color-text);
}

.about-text p {
    font-size: var(--font-size-md);
    font-weight: 300;
    color: var(--color-text-secondary);
    margin-bottom: var(--spacing-xs);
    letter-spacing: 0.02em;
}

.about-text p:last-child {
    color: var(--color-text);
    margin-top: var(--spacing-sm);
}

/* ==========================================================================
   Contact Section
   ========================================================================== */
.contact {
    min-height: 50vh;
    min-height: 50dvh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: var(--spacing-xl) var(--spacing-md);
    padding-left: max(var(--spacing-md), var(--safe-left));
    padding-right: max(var(--spacing-md), var(--safe-right));
    background: var(--color-bg-alt);
    border-top: 1px solid var(--color-border);
}

.contact-inner {
    text-align: center;
    width: 100%;
    max-width: 600px;
    margin: 0 auto;
}

.contact-title {
    font-size: var(--font-size-2xl);
    font-weight: 300;
    letter-spacing: -0.01em;
    margin-bottom: var(--spacing-md);
    color: var(--color-text);
}

.contact-links {
    display: flex;
    gap: var(--spacing-lg);
    justify-content: center;
    flex-wrap: wrap;
}

.contact-link {
    font-size: var(--font-size-sm);
    font-weight: 400;
    letter-spacing: 0.12em;
    text-transform: uppercase;
    color: var(--color-text-secondary);
    padding-bottom: var(--spacing-xs);
    border-bottom: 1px solid transparent;
    transition: all var(--transition-base);
}

.contact-link:hover {
    color: var(--color-text);
    border-bottom-color: var(--color-text);
    letter-spacing: 0.18em;
}

/* ==========================================================================
   Footer
   ========================================================================== */
.footer {
    padding: var(--spacing-md);
    padding-bottom: calc(var(--spacing-md) + var(--safe-bottom));
    text-align: center;
    background: var(--color-bg-alt);
    border-top: 1px solid var(--color-border);
}

.footer p {
    font-size: var(--font-size-xs);
    color: var(--color-text-muted);
    letter-spacing: 0.05em;
}

/* ==========================================================================
   Animations
   ========================================================================== */
.animate-in {
    opacity: 0;
    transform: translateY(15px);
    animation: fadeInUp 0.7s cubic-bezier(0.4, 0, 0.2, 1) forwards;
}

.delay-1 {
    animation-delay: 0.15s;
}

.delay-2 {
    animation-delay: 0.3s;
}

.delay-3 {
    animation-delay: 0.45s;
}

@keyframes fadeInUp {
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* Scroll reveal */
.scroll-reveal {
    opacity: 0;
    transform: translateY(20px);
    transition: opacity 0.6s cubic-bezier(0.4, 0, 0.2, 1),
        transform 0.6s cubic-bezier(0.4, 0, 0.2, 1);
}

.scroll-reveal.visible {
    opacity: 1;
    transform: translateY(0);
}

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

    .nav-menu {
        position: fixed;
        top: 0;
        right: -100%;
        width: 70%;
        max-width: 300px;
        height: 100vh;
        height: 100dvh;
        background: rgba(10, 10, 10, 0.98);
        -webkit-backdrop-filter: blur(10px);
        backdrop-filter: blur(10px);
        flex-direction: column;
        justify-content: center;
        gap: var(--spacing-lg);
        transition: right var(--transition-slow);
        padding: var(--spacing-xl) var(--spacing-lg);
        padding-top: calc(var(--spacing-xl) + var(--safe-top));
        padding-bottom: calc(var(--spacing-xl) + var(--safe-bottom));
        z-index: 999;
    }

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

    .nav-menu a {
        font-size: var(--font-size-lg);
        letter-spacing: 0.1em;
    }

    .world-content {
        text-align: center;
        max-width: 100%;
    }

    .piano-section .world-content,
    .dj-section .world-content {
        margin-left: 0;
    }

    .world-bg {
        top: 0;
        height: 100%;
    }

    .world-image {
        opacity: 0.35;
    }

    .world-overlay {
        background: linear-gradient(to bottom,
                rgba(10, 10, 10, 0.5) 0%,
                rgba(10, 10, 10, 0.7) 50%,
                rgba(10, 10, 10, 0.85) 100%);
    }

    .btn-world {
        margin: 0 auto;
        display: inline-block;
    }

    .contact-links {
        flex-direction: column;
        gap: var(--spacing-sm);
    }
}

@media (max-width: 480px) {
    .world-section {
        padding: var(--spacing-lg) var(--spacing-sm);
        padding-left: max(var(--spacing-sm), var(--safe-left));
        padding-right: max(var(--spacing-sm), var(--safe-right));
    }

    .hero {
        padding: var(--spacing-lg) var(--spacing-sm);
        padding-left: max(var(--spacing-sm), var(--safe-left));
        padding-right: max(var(--spacing-sm), var(--safe-right));
    }
}

/* ==========================================================================
   Reduced Motion
   ========================================================================== */
@media (prefers-reduced-motion: reduce) {
    html {
        scroll-behavior: auto;
    }

    .animate-in,
    .scroll-reveal {
        opacity: 1;
        transform: none;
        animation: none;
        transition: none;
    }

    .world-bg {
        transition: none;
        will-change: auto;
    }

    .world-image {
        transition: none;
        will-change: auto;
    }

    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
        scroll-behavior: auto !important;
    }
}