/* ===================================
   Haoyun Music Player - Website Styles
   =================================== */

/* CSS Variables */
:root {
    --primary-color: #4A90E2;
    --secondary-color: #6C5CE7;
    --accent-color: #00D9FF;
    --dark-bg: #1B2636;
    --darker-bg: #0F1923;
    --light-bg: #F8F9FA;
    --text-primary: #FFFFFF;
    --text-secondary: #B0BEC5;
    --text-dark: #2C3E50;
    --gradient-1: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    --gradient-2: linear-gradient(135deg, #f093fb 0%, #f5576c 100%);
    --gradient-3: linear-gradient(135deg, #4facfe 0%, #00f2fe 100%);
    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.1);
    --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.15);
    --shadow-lg: 0 8px 32px rgba(0, 0, 0, 0.2);
    --border-radius: 12px;
    --transition: all 0.3s ease;
}

/* Reset & Base Styles */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    line-height: 1.6;
    color: var(--text-dark);
    overflow-x: hidden;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

/* Navigation */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background: rgba(27, 38, 54, 0.95);
    backdrop-filter: blur(10px);
    z-index: 1000;
    padding: 1rem 0;
    transition: var(--transition);
}

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

.nav-brand {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--text-primary);
}

.logo {
    font-size: 2rem;
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: 2rem;
    align-items: center;
}

.nav-menu a {
    color: var(--text-secondary);
    text-decoration: none;
    font-weight: 500;
    transition: var(--transition);
}

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

.btn-github {
    background: var(--gradient-1);
    color: white !important;
    padding: 0.5rem 1.5rem;
    border-radius: 25px;
    font-weight: 600;
}

.btn-github:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.hamburger {
    display: none;
    flex-direction: column;
    cursor: pointer;
    gap: 4px;
}

.hamburger span {
    width: 25px;
    height: 3px;
    background: var(--text-primary);
    border-radius: 3px;
    transition: var(--transition);
}

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

.hero .container {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    align-items: center;
    position: relative;
    z-index: 1;
}

.hero-title {
    font-size: 3.5rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 1rem;
    line-height: 1.2;
}

.hero-subtitle {
    font-size: 1.8rem;
    color: var(--text-secondary);
    margin-bottom: 1rem;
    font-weight: 300;
}

.hero-description {
    font-size: 1.2rem;
    color: var(--text-secondary);
    margin-bottom: 2rem;
}

.hero-badges {
    display: flex;
    gap: 1rem;
    flex-wrap: wrap;
    margin-bottom: 2rem;
}

.badge {
    background: rgba(255, 255, 255, 0.1);
    color: var(--text-primary);
    padding: 0.5rem 1rem;
    border-radius: 20px;
    font-size: 0.9rem;
    font-weight: 500;
    border: 1px solid rgba(255, 255, 255, 0.2);
}

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

.hero-image {
    display: flex;
    justify-content: center;
    align-items: center;
}

.hero-screenshot {
    max-width: 100%;
    height: auto;
    border-radius: var(--border-radius);
    box-shadow: var(--shadow-lg);
    border: 1px solid rgba(255, 255, 255, 0.1);
    transition: var(--transition);
}

.hero-screenshot:hover {
    transform: translateY(-5px);
    box-shadow: 0 12px 40px rgba(0, 0, 0, 0.3);
}

.btn {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.875rem 2rem;
    border-radius: 30px;
    font-weight: 600;
    text-decoration: none;
    transition: var(--transition);
    border: none;
    cursor: pointer;
    font-size: 1rem;
}

.btn-primary {
    background: var(--gradient-1);
    color: white;
}

.btn-primary:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow-lg);
}

.btn-secondary {
    background: rgba(255, 255, 255, 0.1);
    color: var(--text-primary);
    border: 2px solid rgba(255, 255, 255, 0.3);
}

.btn-secondary:hover {
    background: rgba(255, 255, 255, 0.2);
    transform: translateY(-3px);
}

.btn-outline {
    background: transparent;
    color: var(--text-primary);
    border: 2px solid var(--text-primary);
}

.btn-outline:hover {
    background: var(--text-primary);
    color: var(--dark-bg);
    transform: translateY(-3px);
}

.btn-large {
    padding: 1rem 2.5rem;
    font-size: 1.1rem;
}

/* Mockup Window */
.mockup-window {
    background: var(--darker-bg);
    border-radius: var(--border-radius);
    overflow: hidden;
    box-shadow: var(--shadow-lg);
    border: 1px solid rgba(255, 255, 255, 0.1);
}

.window-header {
    background: rgba(255, 255, 255, 0.05);
    padding: 1rem;
    display: flex;
    align-items: center;
    gap: 1rem;
}

.window-controls {
    display: flex;
    gap: 0.5rem;
}

.control {
    width: 12px;
    height: 12px;
    border-radius: 50%;
}

.control.close {
    background: #ff5f56;
}

.control.minimize {
    background: #ffbd2e;
}

.control.maximize {
    background: #27c93f;
}

.window-title {
    color: var(--text-secondary);
    font-size: 0.9rem;
}

.window-content {
    padding: 2rem;
}

.mockup-player {
    text-align: center;
    color: var(--text-primary);
}

.player-cover {
    width: 150px;
    height: 150px;
    background: var(--gradient-1);
    border-radius: var(--border-radius);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 4rem;
    margin: 0 auto 1.5rem;
}

.player-info {
    margin-bottom: 1.5rem;
}

.song-title {
    font-size: 1.5rem;
    font-weight: 600;
    margin-bottom: 0.5rem;
}

.artist-name {
    color: var(--text-secondary);
    font-size: 1rem;
}

.player-progress {
    margin-bottom: 1.5rem;
}

.progress-bar {
    height: 6px;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 3px;
    overflow: hidden;
    margin-bottom: 0.5rem;
}

.progress-fill {
    height: 100%;
    background: var(--gradient-1);
    border-radius: 3px;
    transition: width 0.3s ease;
}

.progress-time {
    display: flex;
    justify-content: space-between;
    color: var(--text-secondary);
    font-size: 0.85rem;
}

.player-controls {
    display: flex;
    justify-content: center;
    gap: 1.5rem;
}

.control-btn {
    background: none;
    border: none;
    color: var(--text-primary);
    font-size: 1.5rem;
    cursor: pointer;
    transition: var(--transition);
    padding: 0.5rem;
}

.control-btn:hover {
    transform: scale(1.1);
}

.control-btn.play {
    font-size: 2rem;
}

/* Background Shapes */
.hero-bg-shapes {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    overflow: hidden;
    z-index: 0;
}

.shape {
    position: absolute;
    border-radius: 50%;
    opacity: 0.1;
}

.shape-1 {
    width: 400px;
    height: 400px;
    background: var(--gradient-1);
    top: -100px;
    right: -100px;
    animation: float 6s ease-in-out infinite;
}

.shape-2 {
    width: 300px;
    height: 300px;
    background: var(--gradient-2);
    bottom: -50px;
    left: -50px;
    animation: float 8s ease-in-out infinite reverse;
}

.shape-3 {
    width: 200px;
    height: 200px;
    background: var(--gradient-3);
    top: 50%;
    left: 50%;
    animation: float 7s ease-in-out infinite;
}

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

/* Section Styles */
section {
    padding: 5rem 0;
}

.section-header {
    text-align: center;
    margin-bottom: 3rem;
}

.section-title {
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: 1rem;
    color: var(--text-dark);
}

.section-subtitle {
    font-size: 1.2rem;
    color: #666;
}

/* Features Section */
.features {
    background: var(--light-bg);
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 2rem;
}

.feature-card {
    background: white;
    padding: 2rem;
    border-radius: var(--border-radius);
    box-shadow: var(--shadow-sm);
    transition: var(--transition);
    text-align: center;
}

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

.feature-icon {
    font-size: 3rem;
    margin-bottom: 1rem;
}

.feature-title {
    font-size: 1.5rem;
    font-weight: 600;
    margin-bottom: 1rem;
    color: var(--text-dark);
}

.feature-description {
    color: #666;
    line-height: 1.6;
}

/* Screenshots Section */
.screenshots {
    background: white;
}

.screenshots-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
    margin-bottom: 2rem;
}

.screenshot-card {
    background: var(--light-bg);
    border-radius: var(--border-radius);
    overflow: hidden;
    box-shadow: var(--shadow-sm);
    transition: var(--transition);
}

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

.screenshot-placeholder {
    aspect-ratio: 16/10;
    background: var(--gradient-1);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    color: white;
}

.screenshot-image {
    width: 100%;
    height: auto;
    display: block;
    object-fit: cover;
}

.placeholder-icon {
    font-size: 4rem;
    margin-bottom: 1rem;
}

.placeholder-text {
    font-size: 1.2rem;
    font-weight: 600;
}

.screenshot-caption {
    padding: 1rem;
    text-align: center;
    font-weight: 500;
    color: var(--text-dark);
}

.screenshot-note {
    text-align: center;
    color: #666;
    font-style: italic;
}

/* Download Section */
.download {
    background: var(--light-bg);
}

.download-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
    margin-bottom: 3rem;
}

.download-card {
    background: white;
    padding: 2rem;
    border-radius: var(--border-radius);
    box-shadow: var(--shadow-sm);
    text-align: center;
    transition: var(--transition);
}

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

.platform-icon {
    font-size: 4rem;
    margin-bottom: 1rem;
}

.platform-name {
    font-size: 1.8rem;
    font-weight: 700;
    margin-bottom: 0.5rem;
    color: var(--text-dark);
}

.platform-version {
    color: #666;
    margin-bottom: 1.5rem;
}

.platform-features {
    list-style: none;
    text-align: left;
    margin-bottom: 2rem;
}

.platform-features li {
    padding: 0.5rem 0;
    color: #555;
}

.download-buttons {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.btn-download {
    background: var(--gradient-1);
    color: white;
    padding: 0.875rem 2rem;
    border-radius: 30px;
    text-decoration: none;
    font-weight: 600;
    transition: var(--transition);
}

.btn-download:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.install-command {
    background: var(--darker-bg);
    color: var(--accent-color);
    padding: 0.75rem 1rem;
    border-radius: 8px;
    font-size: 0.85rem;
    display: block;
    overflow-x: auto;
}

.download-source {
    background: white;
    padding: 2rem;
    border-radius: var(--border-radius);
    box-shadow: var(--shadow-sm);
}

.download-source h3 {
    margin-bottom: 1rem;
    color: var(--text-dark);
}

.code-block {
    background: var(--darker-bg);
    padding: 1.5rem;
    border-radius: 8px;
    margin-bottom: 1rem;
    overflow-x: auto;
}

.code-block pre {
    margin: 0;
    color: var(--text-primary);
    font-family: 'Courier New', monospace;
    font-size: 0.9rem;
    line-height: 1.6;
}

.btn-link {
    color: var(--primary-color);
    text-decoration: none;
    font-weight: 600;
    transition: var(--transition);
}

.btn-link:hover {
    color: var(--secondary-color);
}

/* Documentation Section */
.documentation {
    background: white;
}

.docs-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
}

.doc-category {
    background: var(--light-bg);
    padding: 2rem;
    border-radius: var(--border-radius);
    box-shadow: var(--shadow-sm);
}

.doc-category-title {
    font-size: 1.5rem;
    font-weight: 600;
    margin-bottom: 1.5rem;
    color: var(--text-dark);
}

.doc-list {
    list-style: none;
}

.doc-list li {
    margin-bottom: 0.75rem;
}

.doc-list a {
    color: var(--primary-color);
    text-decoration: none;
    transition: var(--transition);
    display: inline-block;
}

.doc-list a:hover {
    color: var(--secondary-color);
    transform: translateX(5px);
}

/* Tech Stack Section */
.tech-stack {
    background: var(--dark-bg);
    color: var(--text-primary);
}

.tech-stack .section-title,
.tech-stack .section-subtitle {
    color: var(--text-primary);
}

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

.tech-category {
    background: rgba(255, 255, 255, 0.05);
    padding: 2rem;
    border-radius: var(--border-radius);
    border: 1px solid rgba(255, 255, 255, 0.1);
}

.tech-category h3 {
    font-size: 1.3rem;
    margin-bottom: 1.5rem;
    color: var(--text-primary);
}

.tech-items {
    display: flex;
    flex-wrap: wrap;
    gap: 0.75rem;
}

.tech-item {
    background: rgba(255, 255, 255, 0.1);
    padding: 0.5rem 1rem;
    border-radius: 20px;
    font-size: 0.9rem;
    border: 1px solid rgba(255, 255, 255, 0.2);
}

/* CTA Section */
.cta {
    background: var(--gradient-1);
    color: white;
    text-align: center;
    padding: 5rem 0;
}

.cta-title {
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: 1rem;
}

.cta-description {
    font-size: 1.2rem;
    margin-bottom: 2rem;
    opacity: 0.9;
}

.cta-actions {
    display: flex;
    gap: 1rem;
    justify-content: center;
    flex-wrap: wrap;
}

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

.cta .btn-primary:hover {
    background: var(--light-bg);
}

.cta .btn-outline {
    border-color: white;
    color: white;
}

.cta .btn-outline:hover {
    background: white;
    color: var(--primary-color);
}

/* Footer */
.footer {
    background: var(--darker-bg);
    color: var(--text-secondary);
    padding: 3rem 0 1rem;
}

.footer-content {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1fr;
    gap: 3rem;
    margin-bottom: 2rem;
}

.footer-section h3 {
    color: var(--text-primary);
    font-size: 1.5rem;
    margin-bottom: 1rem;
}

.footer-section h4 {
    color: var(--text-primary);
    font-size: 1.1rem;
    margin-bottom: 1rem;
}

.footer-section p {
    margin-bottom: 1rem;
}

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

.footer-section ul li {
    margin-bottom: 0.5rem;
}

.footer-section a {
    color: var(--text-secondary);
    text-decoration: none;
    transition: var(--transition);
}

.footer-section a:hover {
    color: var(--primary-color);
}

.social-links {
    display: flex;
    gap: 1rem;
    margin-top: 1rem;
}

.social-links a {
    color: var(--text-secondary);
    transition: var(--transition);
}

.social-links a:hover {
    color: var(--primary-color);
    transform: translateY(-3px);
}

.footer-bottom {
    text-align: center;
    padding-top: 2rem;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
}

.footer-bottom p {
    margin: 0.5rem 0;
}

/* Responsive Design */
@media (max-width: 968px) {
    .hero .container {
        grid-template-columns: 1fr;
        text-align: center;
    }
    
    .hero-title {
        font-size: 2.5rem;
    }
    
    .hero-subtitle {
        font-size: 1.5rem;
    }
    
    .hero-actions {
        justify-content: center;
    }
    
    .footer-content {
        grid-template-columns: 1fr 1fr;
    }
}

@media (max-width: 768px) {
    .nav-menu {
        position: fixed;
        left: -100%;
        top: 70px;
        flex-direction: column;
        background: var(--dark-bg);
        width: 100%;
        text-align: center;
        transition: 0.3s;
        padding: 2rem 0;
        gap: 1.5rem;
    }
    
    .nav-menu.active {
        left: 0;
    }
    
    .hamburger {
        display: flex;
    }
    
    .hamburger.active span:nth-child(1) {
        transform: rotate(45deg) translate(5px, 5px);
    }
    
    .hamburger.active span:nth-child(2) {
        opacity: 0;
    }
    
    .hamburger.active span:nth-child(3) {
        transform: rotate(-45deg) translate(7px, -6px);
    }
    
    .section-title {
        font-size: 2rem;
    }
    
    .features-grid,
    .screenshots-grid,
    .download-grid,
    .docs-grid,
    .tech-grid {
        grid-template-columns: 1fr;
    }
    
    .footer-content {
        grid-template-columns: 1fr;
        text-align: center;
    }
    
    .social-links {
        justify-content: center;
    }
}

@media (max-width: 480px) {
    .hero-title {
        font-size: 2rem;
    }
    
    .hero-subtitle {
        font-size: 1.2rem;
    }
    
    .btn {
        padding: 0.75rem 1.5rem;
        font-size: 0.9rem;
    }
    
    .cta-title {
        font-size: 2rem;
    }
}

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

.feature-card,
.screenshot-card,
.download-card,
.doc-category {
    animation: fadeInUp 0.6s ease-out;
}

/* Scrollbar Styling */
::-webkit-scrollbar {
    width: 10px;
}

::-webkit-scrollbar-track {
    background: var(--light-bg);
}

::-webkit-scrollbar-thumb {
    background: var(--primary-color);
    border-radius: 5px;
}

::-webkit-scrollbar-thumb:hover {
    background: var(--secondary-color);
}