/* =================================
   3D Guitar Landing Page Styles
   Enhanced with comprehensive theme support
   ================================= */

/* Enhanced Variables for Landing Page */
:root {
    /* Landing Page Specific Colors */
    --landing-primary: #6366f1;
    --landing-secondary: #8b5cf6;
    --landing-accent: #f59e0b;
    --landing-glow: #6366f1;
    --landing-surface: rgba(255, 255, 255, 0.1);
    --landing-border: rgba(255, 255, 255, 0.2);
    
    /* Animation Timings */
    --transition-bounce: 0.4s cubic-bezier(0.68, -0.55, 0.265, 1.55);
    --transition-smooth: 0.8s cubic-bezier(0.25, 0.46, 0.45, 0.94);
}

/* Dark Theme Landing Variables */
[data-theme="dark"] {
    --landing-primary: #60a5fa;
    --landing-secondary: #a78bfa;
    --landing-accent: #fbbf24;
    --landing-glow: #60a5fa;
    --landing-surface: rgba(0, 0, 0, 0.3);
    --landing-border: rgba(255, 255, 255, 0.1);
}

/* =================================
   Loading Screen
   ================================= */

.loading-screen {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, var(--landing-primary), var(--landing-secondary));
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: var(--z-loading);
    transition: opacity var(--transition-slow), visibility var(--transition-slow);
}

.loading-screen.hidden {
    opacity: 0;
    visibility: hidden;
    pointer-events: none;
}

.loading-content {
    text-align: center;
    color: var(--text-inverse);
}

.loading-spinner {
    width: 60px;
    height: 60px;
    border: 3px solid rgba(255, 255, 255, 0.3);
    border-top: 3px solid var(--text-inverse);
    border-radius: 50%;
    animation: spin 1s linear infinite;
    margin: 0 auto var(--spacing-lg);
}

.loading-text {
    font-size: var(--font-size-lg);
    font-weight: 500;
    opacity: 0.9;
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

/* =================================
   Background Elements
   ================================= */

.background-gradient {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(
        135deg, 
        var(--background-primary) 0%, 
        var(--background-secondary) 50%, 
        var(--landing-primary) 100%
    );
    opacity: 0.1;
    z-index: var(--z-background);
    transition: opacity var(--transition);
}

.floating-particles {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    z-index: var(--z-background);
}

.floating-particles::before,
.floating-particles::after {
    content: '';
    position: absolute;
    width: 200px;
    height: 200px;
    background: radial-gradient(circle, var(--landing-glow) 0%, transparent 70%);
    border-radius: 50%;
    opacity: 0.1;
    animation: float 6s ease-in-out infinite;
}

.floating-particles::before {
    top: 20%;
    left: 10%;
    animation-delay: 0s;
}

.floating-particles::after {
    bottom: 20%;
    right: 10%;
    animation-delay: 3s;
}

@keyframes float {
    0%, 100% { 
        transform: translateY(0px) rotate(0deg); 
        opacity: 0.1;
    }
    50% { 
        transform: translateY(-20px) rotate(180deg); 
        opacity: 0.2;
    }
}

/* =================================
   Main Container
   ================================= */

.main-container {
    min-height: 100vh;
    position: relative;
    overflow: hidden;
}

/* =================================
   Header & Navigation (Landing)
   ================================= */

.header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    padding: var(--spacing-lg) var(--spacing-xl);
    background: var(--landing-surface);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--landing-border);
    z-index: var(--z-header);
    transition: all var(--transition);
}

.nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
    max-width: 1400px;
    margin: 0 auto;
}

.nav-brand {
    font-family: var(--font-family-secondary);
    font-weight: 700;
    font-size: var(--font-size-xl);
}

.brand-text {
    color: var(--landing-primary);
    text-shadow: 0 0 10px var(--landing-glow);
    transition: var(--transition);
}

.nav-controls {
    display: flex;
    gap: var(--spacing-md);
}

.audio-toggle,
.nav-controls .theme-toggle {
    width: 45px;
    height: 45px;
    border: none;
    border-radius: 12px;
    background: var(--landing-surface);
    color: var(--text-primary);
    font-size: var(--font-size-lg);
    cursor: pointer;
    transition: all var(--transition);
    backdrop-filter: blur(10px);
    border: 1px solid var(--landing-border);
    position: relative;
    overflow: hidden;
}

.audio-toggle::before,
.nav-controls .theme-toggle::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255,255,255,0.2), transparent);
    transition: left 0.5s;
}

.audio-toggle:hover::before,
.nav-controls .theme-toggle:hover::before {
    left: 100%;
}

.audio-toggle:hover,
.nav-controls .theme-toggle:hover {
    background: var(--landing-primary);
    color: var(--text-inverse);
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(99, 102, 241, 0.4);
}

.audio-toggle.muted {
    color: var(--landing-accent);
}

/* =================================
   Hero Section (Landing)
   ================================= */

.main-content {
    padding-top: 100px;
    min-height: 100vh;
}

.hero-section {
    min-height: calc(100vh - 100px);
    display: flex;
    align-items: center;
    padding: 0 var(--spacing-xl);
    position: relative;
}

.hero-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-3xl);
    align-items: center;
    max-width: 1400px;
    margin: 0 auto;
    width: 100%;
}

.hero-text {
    animation: slideInLeft 1s ease-out;
    text-align: center;
}

.hero-title {
    font-family: var(--font-family-secondary);
    font-weight: 700;
    margin-bottom: var(--spacing-lg);
    line-height: 1.1;
}

.greeting {
    display: block;
    font-size: var(--font-size-xl);
    color: var(--text-secondary);
    margin-bottom: var(--spacing-xs);
    opacity: 0;
    animation: fadeInUp 0.8s ease-out 0.2s forwards;
}

.name {
    display: block;
    font-size: var(--font-size-5xl);
    color: var(--landing-primary);
    margin-bottom: var(--spacing-sm);
    text-shadow: 0 0 20px rgba(99, 102, 241, 0.3);
    opacity: 0;
    animation: fadeInUp 0.8s ease-out 0.4s forwards;
}

.tagline {
    display: block;
    font-size: var(--font-size-2xl);
    color: var(--text-secondary);
    font-weight: 500;
    opacity: 0;
    animation: fadeInUp 0.8s ease-out 0.6s forwards;
}

.hero-description {
    font-size: var(--font-size-lg);
    color: var(--text-secondary);
    line-height: 1.7;
    margin-bottom: var(--spacing-2xl);
    max-width: 500px;
    margin-left: auto;
    margin-right: auto;
    text-align: center;
    opacity: 0;
    animation: fadeInUp 0.8s ease-out 0.8s forwards;
}

.hero-actions {
    display: flex;
    gap: var(--spacing-lg);
    flex-wrap: wrap;
    justify-content: center;
    opacity: 0;
    animation: fadeInUp 0.8s ease-out 1s forwards;
}

/* Enhanced Button Styles */
.btn-primary,
.btn-secondary {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-md) var(--spacing-xl);
    border: none;
    border-radius: 12px;
    font-size: var(--font-size-base);
    font-weight: 600;
    cursor: pointer;
    transition: all var(--transition-bounce);
    text-decoration: none;
    position: relative;
    overflow: hidden;
}

.btn-primary {
    background: linear-gradient(135deg, var(--landing-primary), var(--landing-secondary));
    color: var(--text-inverse);
    box-shadow: 0 4px 15px rgba(99, 102, 241, 0.3);
}

.btn-primary::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255,255,255,0.2), transparent);
    transition: left 0.5s;
}

.btn-primary:hover::before {
    left: 100%;
}

.btn-primary:hover {
    transform: translateY(-3px);
    box-shadow: 0 8px 25px rgba(99, 102, 241, 0.4);
}

.btn-secondary {
    background: var(--landing-surface);
    color: var(--text-primary);
    border: 1px solid var(--landing-border);
    backdrop-filter: blur(10px);
}

.btn-secondary:hover {
    background: var(--landing-primary);
    color: var(--text-inverse);
    transform: translateY(-2px);
}

/* =================================
   3D Guitar Container
   ================================= */

.guitar-container {
    position: relative;
    height: 600px;
    animation: slideInRight 1s ease-out;
}

.guitar-scene {
    width: 100%;
    height: 100%;
    border-radius: 20px;
    overflow: hidden;
    position: relative;
    background: linear-gradient(135deg, var(--landing-surface), transparent);
    backdrop-filter: blur(10px);
    border: 1px solid var(--landing-border);
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.1);
    transition: var(--transition);
}

.guitar-scene:hover {
    transform: translateY(-5px);
    box-shadow: 0 12px 40px rgba(0, 0, 0, 0.15);
}

.guitar-controls {
    position: absolute;
    top: var(--spacing-lg);
    right: var(--spacing-lg);
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
    z-index: var(--z-controls);
}

.control-btn {
    width: 40px;
    height: 40px;
    border: none;
    border-radius: 10px;
    background: var(--landing-surface);
    color: var(--text-primary);
    font-size: var(--font-size-sm);
    cursor: pointer;
    transition: all var(--transition);
    backdrop-filter: blur(10px);
    border: 1px solid var(--landing-border);
    position: relative;
    overflow: hidden;
}

.control-btn::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255,255,255,0.2), transparent);
    transition: left 0.3s;
}

.control-btn:hover::before {
    left: 100%;
}

.control-btn:hover {
    background: var(--landing-primary);
    color: var(--text-inverse);
    transform: scale(1.05);
}

.guitar-glow {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 300px;
    height: 300px;
    background: radial-gradient(circle, var(--landing-glow) 0%, transparent 70%);
    border-radius: 50%;
    opacity: 0.2;
    animation: pulse 3s ease-in-out infinite;
    pointer-events: none;
}

@keyframes pulse {
    0%, 100% { 
        transform: translate(-50%, -50%) scale(1); 
        opacity: 0.2; 
    }
    50% { 
        transform: translate(-50%, -50%) scale(1.1); 
        opacity: 0.3; 
    }
}

/* Sound Waves Animation */
.sound-waves {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    pointer-events: none;
    opacity: 0;
    transition: opacity var(--transition);
}

.sound-waves.active {
    opacity: 1;
}

.wave {
    position: absolute;
    border: 2px solid var(--landing-glow);
    border-radius: 50%;
    opacity: 0;
}

.wave-1 {
    width: 100px;
    height: 100px;
    margin: -50px 0 0 -50px;
    animation: wave-animation 2s linear infinite;
}

.wave-2 {
    width: 150px;
    height: 150px;
    margin: -75px 0 0 -75px;
    animation: wave-animation 2s linear infinite 0.5s;
}

.wave-3 {
    width: 200px;
    height: 200px;
    margin: -100px 0 0 -100px;
    animation: wave-animation 2s linear infinite 1s;
}

@keyframes wave-animation {
    0% {
        transform: scale(0);
        opacity: 1;
    }
    100% {
        transform: scale(1);
        opacity: 0;
    }
}

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

@keyframes slideInLeft {
    from {
        opacity: 0;
        transform: translateX(-50px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

@keyframes slideInRight {
    from {
        opacity: 0;
        transform: translateX(50px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

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

/* =================================
   Responsive Design (Landing)
   ================================= */

@media (max-width: 1024px) {
    .hero-content {
        grid-template-columns: 1fr;
        gap: var(--spacing-2xl);
        text-align: center;
    }
    
    .guitar-container {
        height: 500px;
    }
    
    .name {
        font-size: var(--font-size-4xl);
    }
}

@media (max-width: 768px) {
    .header {
        padding: var(--spacing-md) var(--spacing-lg);
    }
    
    .hero-section {
        padding: 0 var(--spacing-lg);
    }
    
    .hero-content {
        gap: var(--spacing-xl);
    }
    
    .name {
        font-size: var(--font-size-3xl);
    }
    
    .tagline {
        font-size: var(--font-size-xl);
    }
    
    .hero-description {
        font-size: var(--font-size-base);
    }
    
    .guitar-container {
        height: 400px;
    }
    
    .hero-actions {
        flex-direction: column;
        align-items: center;
    }
    
    .btn-primary,
    .btn-secondary {
        width: 200px;
        justify-content: center;
    }
    
    .nav-controls {
        gap: var(--spacing-sm);
    }
    
    .audio-toggle,
    .nav-controls .theme-toggle {
        width: 40px;
        height: 40px;
        font-size: var(--font-size-base);
    }
}

@media (max-width: 480px) {
    .main-content {
        padding-top: 80px;
    }
    
    .hero-section {
        min-height: calc(100vh - 80px);
        padding: 0 var(--spacing-md);
    }
    
    .name {
        font-size: var(--font-size-2xl);
    }
    
    .tagline {
        font-size: var(--font-size-lg);
    }
    
    .guitar-container {
        height: 300px;
    }
    
    .guitar-scene {
        border-radius: 15px;
    }
    
    .hero-actions {
        gap: var(--spacing-md);
    }
    
    .btn-primary,
    .btn-secondary {
        width: 100%;
        max-width: 250px;
    }
}

/* High Performance Mode */
@media (prefers-reduced-motion: reduce) {
    .floating-particles::before,
    .floating-particles::after,
    .guitar-glow,
    .loading-spinner {
        animation: none !important;
    }
    
    .hero-text,
    .guitar-container {
        animation: none !important;
    }
    
    .greeting,
    .name,
    .tagline,
    .hero-description,
    .hero-actions {
        animation: none !important;
        opacity: 1 !important;
    }
}

/* Dark theme specific landing adjustments */
[data-theme="dark"] .background-gradient {
    background: linear-gradient(
        135deg, 
        var(--background-primary) 0%, 
        var(--background-secondary) 50%, 
        var(--landing-primary) 100%
    );
    opacity: 0.15;
}

[data-theme="dark"] .guitar-scene {
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.3);
}

[data-theme="dark"] .guitar-scene:hover {
    box-shadow: 0 12px 40px rgba(0, 0, 0, 0.4);
}