/* ============================================
   ColorfulSound - Neon Theme Stylesheet
   ============================================ */

/* CSS Custom Properties */
:root {
    /* Neon Colors */
    --neon-cyan: #00ffff;
    --neon-magenta: #ff00ff;
    --neon-purple: #8b5cf6;
    --neon-pink: #ff0080;
    --neon-blue: #0088ff;
    --neon-green: #00ff88;
    --neon-yellow: #ffff00;
    --neon-orange: #ff8800;
    --neon-red: #ff0000;

    /* Background Colors */
    --bg-dark: #0a0a0f;
    --bg-darker: #050508;
    --bg-card: rgba(20, 20, 30, 0.7);
    --bg-glass: rgba(255, 255, 255, 0.05);

    /* Text Colors */
    --text-primary: #ffffff;
    --text-secondary: rgba(255, 255, 255, 0.7);
    --text-muted: rgba(255, 255, 255, 0.5);

    /* Gradients */
    --gradient-rainbow: linear-gradient(90deg, #ff0000, #ff8800, #ffff00, #00ff00, #0088ff, #4400ff, #8800ff);
    --gradient-neon: linear-gradient(135deg, var(--neon-cyan), var(--neon-magenta), var(--neon-purple));

    /* Shadows */
    --glow-cyan: 0 0 20px var(--neon-cyan), 0 0 40px var(--neon-cyan), 0 0 60px var(--neon-cyan);
    --glow-magenta: 0 0 20px var(--neon-magenta), 0 0 40px var(--neon-magenta), 0 0 60px var(--neon-magenta);
    --glow-purple: 0 0 20px var(--neon-purple), 0 0 40px var(--neon-purple), 0 0 60px var(--neon-purple);

    /* Spacing */
    --section-padding: 100px 0;
    --container-width: 1200px;

    /* Transitions */
    --transition-fast: 0.2s ease;
    --transition-medium: 0.3s ease;
    --transition-slow: 0.5s ease;
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Rajdhani', sans-serif;
    background-color: var(--bg-dark);
    color: var(--text-primary);
    line-height: 1.6;
    overflow-x: hidden;
    min-height: 100vh;
}

/* Selection */
::selection {
    background: var(--neon-magenta);
    color: var(--bg-dark);
}

/* Container */
.container {
    max-width: var(--container-width);
    margin: 0 auto;
    padding: 0 20px;
}

/* Links */
a {
    color: var(--neon-cyan);
    text-decoration: none;
    transition: var(--transition-fast);
}

a:hover {
    color: var(--neon-magenta);
}

/* ============================================
   Particle Background
   ============================================ */
#particles {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    z-index: 0;
    overflow: hidden;
}

.particle {
    position: absolute;
    border-radius: 50%;
    pointer-events: none;
    animation: float 15s infinite ease-in-out;
}

@keyframes float {
    0%, 100% {
        transform: translateY(0) translateX(0) scale(1);
        opacity: 0.5;
    }
    25% {
        transform: translateY(-30px) translateX(20px) scale(1.1);
        opacity: 0.8;
    }
    50% {
        transform: translateY(-10px) translateX(-20px) scale(0.9);
        opacity: 0.6;
    }
    75% {
        transform: translateY(-40px) translateX(10px) scale(1.05);
        opacity: 0.7;
    }
}

/* ============================================
   Navigation
   ============================================ */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    padding: 15px 0;
    background: rgba(10, 10, 15, 0.8);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
    transition: var(--transition-medium);
}

.navbar.scrolled {
    padding: 10px 0;
    background: rgba(10, 10, 15, 0.95);
}

.nav-container {
    max-width: var(--container-width);
    margin: 0 auto;
    padding: 0 20px;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.nav-logo {
    display: flex;
    align-items: center;
    gap: 10px;
    font-family: 'Orbitron', sans-serif;
    font-weight: 700;
    font-size: 1.4rem;
    color: var(--text-primary);
}

.logo-icon {
    width: 36px;
    height: 36px;
    filter: drop-shadow(0 0 10px var(--neon-cyan));
}

.logo-text {
    background: var(--gradient-neon);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: 30px;
    align-items: center;
}

.nav-link {
    font-size: 0.95rem;
    font-weight: 500;
    color: var(--text-secondary);
    padding: 8px 0;
    position: relative;
    letter-spacing: 0.5px;
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--gradient-rainbow);
    transition: var(--transition-medium);
}

.nav-link:hover {
    color: var(--text-primary);
}

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

.nav-cta {
    background: var(--gradient-neon);
    padding: 8px 20px !important;
    border-radius: 25px;
    color: var(--bg-dark) !important;
    font-weight: 600;
}

.nav-cta:hover {
    box-shadow: var(--glow-cyan);
    transform: translateY(-2px);
}

.nav-cta::after {
    display: none;
}

/* Mobile Menu Toggle */
.nav-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 5px;
}

.nav-toggle span {
    width: 25px;
    height: 2px;
    background: var(--text-primary);
    transition: var(--transition-fast);
}

/* ============================================
   Hero Section
   ============================================ */
.hero {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    position: relative;
    padding: 120px 20px 60px;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: radial-gradient(ellipse at center top, rgba(139, 92, 246, 0.15) 0%, transparent 60%),
                radial-gradient(ellipse at 20% 80%, rgba(0, 255, 255, 0.1) 0%, transparent 40%),
                radial-gradient(ellipse at 80% 80%, rgba(255, 0, 255, 0.1) 0%, transparent 40%);
    pointer-events: none;
}

.hero-content {
    text-align: center;
    max-width: 900px;
    position: relative;
    z-index: 1;
}

.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    background: var(--bg-glass);
    border: 1px solid rgba(255, 255, 255, 0.1);
    padding: 8px 20px;
    border-radius: 30px;
    font-size: 0.9rem;
    color: var(--text-secondary);
    margin-bottom: 30px;
    backdrop-filter: blur(10px);
}

.badge-pulse {
    width: 8px;
    height: 8px;
    background: var(--neon-green);
    border-radius: 50%;
    animation: pulse 2s infinite;
}

@keyframes pulse {
    0%, 100% {
        box-shadow: 0 0 0 0 rgba(0, 255, 136, 0.7);
    }
    50% {
        box-shadow: 0 0 0 10px rgba(0, 255, 136, 0);
    }
}

.hero-title {
    font-family: 'Orbitron', sans-serif;
    font-size: clamp(3rem, 10vw, 6rem);
    font-weight: 900;
    line-height: 1.1;
    margin-bottom: 25px;
}

.title-line {
    display: block;
}

.neon-text {
    display: inline-block;
    animation: neonPulse 3s ease-in-out infinite;
}

.neon-text.cyan {
    color: var(--neon-cyan);
    text-shadow: 0 0 10px var(--neon-cyan), 0 0 20px var(--neon-cyan), 0 0 40px var(--neon-cyan);
    animation-delay: 0s;
}

.neon-text.magenta {
    color: var(--neon-magenta);
    text-shadow: 0 0 10px var(--neon-magenta), 0 0 20px var(--neon-magenta), 0 0 40px var(--neon-magenta);
    animation-delay: 0.2s;
}

.neon-text.purple {
    color: var(--neon-purple);
    text-shadow: 0 0 10px var(--neon-purple), 0 0 20px var(--neon-purple), 0 0 40px var(--neon-purple);
    animation-delay: 0.4s;
}

@keyframes neonPulse {
    0%, 100% {
        filter: brightness(1);
    }
    50% {
        filter: brightness(1.3);
    }
}

.hero-subtitle {
    font-size: 1.3rem;
    color: var(--text-secondary);
    max-width: 700px;
    margin: 0 auto 40px;
    line-height: 1.7;
}

.highlight {
    color: var(--neon-cyan);
    font-weight: 600;
}

/* Hero Buttons */
.hero-buttons {
    display: flex;
    gap: 20px;
    justify-content: center;
    flex-wrap: wrap;
    margin-bottom: 50px;
}

.btn {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    padding: 14px 32px;
    border-radius: 50px;
    font-family: 'Rajdhani', sans-serif;
    font-size: 1rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 1px;
    transition: var(--transition-medium);
    cursor: pointer;
    border: none;
}

.btn-primary {
    background: var(--gradient-neon);
    color: var(--bg-dark);
}

.btn-primary:hover {
    box-shadow: var(--glow-cyan);
    transform: translateY(-3px);
    color: var(--bg-dark);
}

.btn-secondary {
    background: transparent;
    border: 2px solid var(--neon-cyan);
    color: var(--neon-cyan);
}

.btn-secondary:hover {
    background: rgba(0, 255, 255, 0.1);
    box-shadow: 0 0 20px rgba(0, 255, 255, 0.3);
    transform: translateY(-3px);
}

.btn-icon {
    font-size: 0.8em;
}

.btn-icon-svg {
    width: 18px;
    height: 18px;
}

/* Hero Stats */
.hero-stats {
    display: flex;
    gap: 60px;
    justify-content: center;
    flex-wrap: wrap;
}

.stat {
    text-align: center;
}

.stat-value {
    display: block;
    font-family: 'Orbitron', sans-serif;
    font-size: 2.5rem;
    font-weight: 700;
    background: var(--gradient-rainbow);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.stat-label {
    font-size: 0.9rem;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 1px;
}

/* Animated Waveform */
.waveform-container {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    height: 150px;
    display: flex;
    align-items: flex-end;
    justify-content: center;
    overflow: hidden;
    opacity: 0.6;
}

.waveform {
    display: flex;
    gap: 4px;
    align-items: flex-end;
    height: 100%;
    padding-bottom: 20px;
}

.wave-bar {
    width: 8px;
    background: var(--color);
    border-radius: 4px 4px 0 0;
    animation: wave 1s ease-in-out infinite;
    animation-delay: calc(var(--i) * 0.05s);
    box-shadow: 0 0 10px var(--color), 0 0 20px var(--color);
}

@keyframes wave {
    0%, 100% {
        height: 20px;
    }
    50% {
        height: calc(20px + var(--i) * 3px);
    }
}

/* ============================================
   Section Styles
   ============================================ */
section {
    padding: var(--section-padding);
    position: relative;
}

.section-header {
    text-align: center;
    margin-bottom: 60px;
}

.section-tag {
    display: inline-block;
    background: var(--bg-glass);
    border: 1px solid rgba(255, 255, 255, 0.1);
    padding: 6px 16px;
    border-radius: 20px;
    font-size: 0.85rem;
    color: var(--neon-cyan);
    text-transform: uppercase;
    letter-spacing: 2px;
    margin-bottom: 15px;
}

.section-title {
    font-family: 'Orbitron', sans-serif;
    font-size: clamp(2rem, 5vw, 3rem);
    font-weight: 700;
    margin-bottom: 15px;
}

.section-subtitle {
    font-size: 1.1rem;
    color: var(--text-secondary);
    max-width: 600px;
    margin: 0 auto;
}

/* ============================================
   Features Section
   ============================================ */
.features {
    background: linear-gradient(180deg, var(--bg-dark) 0%, var(--bg-darker) 100%);
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 30px;
}

.feature-card {
    background: var(--bg-card);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 20px;
    padding: 35px;
    transition: var(--transition-medium);
    position: relative;
    overflow: hidden;
}

.feature-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: var(--gradient-rainbow);
    opacity: 0;
    transition: var(--transition-medium);
}

.feature-card:hover {
    transform: translateY(-10px);
    border-color: rgba(255, 255, 255, 0.2);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.3);
}

.feature-card:hover::before {
    opacity: 1;
}

.feature-icon {
    width: 60px;
    height: 60px;
    border-radius: 15px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 20px;
    transition: var(--transition-medium);
}

.feature-icon svg {
    width: 30px;
    height: 30px;
}

.feature-icon.red {
    background: rgba(255, 0, 0, 0.15);
    color: var(--neon-red);
}
.feature-icon.orange {
    background: rgba(255, 136, 0, 0.15);
    color: var(--neon-orange);
}
.feature-icon.yellow {
    background: rgba(255, 255, 0, 0.15);
    color: var(--neon-yellow);
}
.feature-icon.green {
    background: rgba(0, 255, 136, 0.15);
    color: var(--neon-green);
}
.feature-icon.cyan {
    background: rgba(0, 255, 255, 0.15);
    color: var(--neon-cyan);
}
.feature-icon.purple {
    background: rgba(139, 92, 246, 0.15);
    color: var(--neon-purple);
}

.feature-card:hover .feature-icon {
    transform: scale(1.1);
    box-shadow: 0 0 30px currentColor;
}

.feature-title {
    font-family: 'Orbitron', sans-serif;
    font-size: 1.2rem;
    font-weight: 600;
    margin-bottom: 12px;
}

.feature-desc {
    color: var(--text-secondary);
    font-size: 0.95rem;
    line-height: 1.6;
    margin-bottom: 15px;
}

.feature-tag {
    display: inline-block;
    background: var(--bg-glass);
    border: 1px solid rgba(255, 255, 255, 0.1);
    padding: 4px 12px;
    border-radius: 15px;
    font-size: 0.8rem;
    color: var(--text-muted);
}

/* ============================================
   How It Works Section
   ============================================ */
.how-it-works {
    background: var(--bg-darker);
}

.pipeline-infographic {
    display: flex;
    align-items: center;
    justify-content: center;
    flex-wrap: wrap;
    gap: 15px;
    margin-bottom: 80px;
}

.pipeline-step {
    text-align: center;
    padding: 25px;
    background: var(--bg-card);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 20px;
    min-width: 160px;
    position: relative;
    transition: var(--transition-medium);
}

.pipeline-step:hover {
    transform: translateY(-5px);
    border-color: var(--neon-cyan);
    box-shadow: 0 0 30px rgba(0, 255, 255, 0.2);
}

.step-number {
    position: absolute;
    top: -15px;
    left: 50%;
    transform: translateX(-50%);
    background: var(--gradient-neon);
    color: var(--bg-dark);
    font-family: 'Orbitron', sans-serif;
    font-size: 0.8rem;
    font-weight: 700;
    padding: 5px 15px;
    border-radius: 15px;
}

.step-icon {
    width: 80px;
    height: 80px;
    margin: 15px auto;
}

.step-icon svg {
    width: 100%;
    height: 100%;
}

.step-icon.audio-input { color: var(--neon-cyan); }
.step-icon.fft-analysis { color: var(--neon-orange); }
.step-icon.beat-detect { color: var(--neon-magenta); }
.step-icon.color-map { color: var(--neon-green); }
.step-icon.rgb-output { color: var(--neon-purple); }

.pipeline-step h3 {
    font-family: 'Orbitron', sans-serif;
    font-size: 1rem;
    margin-bottom: 8px;
}

.pipeline-step p {
    font-size: 0.85rem;
    color: var(--text-muted);
    line-height: 1.5;
}

.pipeline-arrow {
    color: var(--neon-cyan);
    opacity: 0.5;
}

.pipeline-arrow svg {
    width: 40px;
    height: 24px;
}

/* Color Spectrum */
.color-spectrum-section {
    max-width: 800px;
    margin: 0 auto;
}

.spectrum-title {
    font-family: 'Orbitron', sans-serif;
    text-align: center;
    margin-bottom: 30px;
    font-size: 1.3rem;
}

.spectrum-visual {
    position: relative;
}

.spectrum-bar {
    position: relative;
    margin-bottom: 40px;
}

.spectrum-gradient {
    height: 40px;
    background: var(--gradient-rainbow);
    border-radius: 20px;
    box-shadow: 0 0 30px rgba(255, 255, 255, 0.2);
}

.spectrum-labels {
    display: flex;
    justify-content: space-between;
    margin-top: 10px;
    font-size: 0.85rem;
    color: var(--text-muted);
}

.spectrum-colors {
    display: flex;
    justify-content: space-between;
    position: relative;
    padding: 0 10px;
}

.color-marker {
    text-align: center;
    position: relative;
}

.color-marker::before {
    content: '';
    position: absolute;
    top: -30px;
    left: 50%;
    transform: translateX(-50%);
    width: 20px;
    height: 20px;
    background: var(--color);
    border-radius: 50%;
    box-shadow: 0 0 15px var(--color);
}

.color-label {
    display: block;
    font-size: 0.8rem;
    font-weight: 600;
    margin-top: 5px;
}

.freq-label {
    display: block;
    font-size: 0.7rem;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 1px;
}

/* ============================================
   Architecture Section
   ============================================ */
.architecture {
    background: linear-gradient(180deg, var(--bg-darker) 0%, var(--bg-dark) 100%);
}

.arch-diagram {
    max-width: 900px;
    margin: 0 auto 60px;
}

.arch-layer {
    margin-bottom: 20px;
}

.layer-title {
    text-align: center;
    font-size: 0.85rem;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 2px;
    margin-bottom: 15px;
}

.processing-boxes, .output-boxes {
    display: flex;
    justify-content: center;
    gap: 20px;
    flex-wrap: wrap;
}

.arch-box {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 10px;
    background: var(--bg-card);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 15px;
    padding: 20px 30px;
    min-width: 150px;
    transition: var(--transition-medium);
}

.arch-box:hover {
    border-color: var(--neon-cyan);
    box-shadow: 0 0 20px rgba(0, 255, 255, 0.2);
}

.arch-box.highlight {
    border-color: var(--neon-magenta);
    background: rgba(255, 0, 255, 0.1);
}

.arch-box.highlight:hover {
    box-shadow: 0 0 30px rgba(255, 0, 255, 0.3);
}

.box-icon {
    width: 40px;
    height: 40px;
    color: var(--neon-cyan);
}

.box-icon svg {
    width: 100%;
    height: 100%;
}

.box-icon.rainbow-icon {
    background: var(--gradient-rainbow);
    -webkit-background-clip: text;
    background-clip: text;
}

.arch-box span {
    font-size: 0.9rem;
    color: var(--text-secondary);
}

.arch-connector {
    height: 40px;
    width: 2px;
    background: linear-gradient(to bottom, var(--neon-cyan), transparent);
    margin: 0 auto;
}

/* Threading Model */
.threading-model {
    max-width: 900px;
    margin: 0 auto;
}

.threading-title {
    font-family: 'Orbitron', sans-serif;
    text-align: center;
    margin-bottom: 30px;
}

.threads-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 25px;
    margin-bottom: 30px;
}

.thread-card {
    background: var(--bg-card);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 15px;
    overflow: hidden;
}

.thread-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 15px 20px;
    font-family: 'Orbitron', sans-serif;
}

.thread-header.cyan {
    background: linear-gradient(135deg, rgba(0, 255, 255, 0.2), transparent);
    border-bottom: 2px solid var(--neon-cyan);
}

.thread-header.magenta {
    background: linear-gradient(135deg, rgba(255, 0, 255, 0.2), transparent);
    border-bottom: 2px solid var(--neon-magenta);
}

.thread-header.purple {
    background: linear-gradient(135deg, rgba(139, 92, 246, 0.2), transparent);
    border-bottom: 2px solid var(--neon-purple);
}

.thread-name {
    font-size: 0.95rem;
    font-weight: 600;
}

.thread-lib {
    font-size: 0.75rem;
    color: var(--text-muted);
    background: var(--bg-glass);
    padding: 3px 10px;
    border-radius: 10px;
}

.thread-tasks {
    list-style: none;
    padding: 20px;
}

.thread-tasks li {
    padding: 8px 0;
    color: var(--text-secondary);
    font-size: 0.9rem;
    display: flex;
    align-items: center;
    gap: 10px;
}

.thread-tasks li::before {
    content: '';
    width: 6px;
    height: 6px;
    background: var(--neon-cyan);
    border-radius: 50%;
}

.queue-visual {
    text-align: center;
    padding: 20px;
    background: var(--bg-card);
    border: 1px dashed rgba(255, 255, 255, 0.2);
    border-radius: 15px;
}

.queue-label {
    font-family: monospace;
    font-size: 0.9rem;
    color: var(--neon-cyan);
    display: block;
    margin-bottom: 15px;
}

.queue-animation {
    display: flex;
    justify-content: center;
    gap: 10px;
}

.queue-item {
    width: 30px;
    height: 30px;
    background: var(--gradient-neon);
    border-radius: 5px;
    animation: queueMove 2s ease-in-out infinite;
}

.queue-item:nth-child(2) { animation-delay: 0.3s; }
.queue-item:nth-child(3) { animation-delay: 0.6s; }

@keyframes queueMove {
    0%, 100% {
        transform: translateX(0);
        opacity: 0.5;
    }
    50% {
        transform: translateX(20px);
        opacity: 1;
    }
}

/* ============================================
   Quick Start Section
   ============================================ */
.quickstart {
    background: var(--bg-dark);
}

.prerequisites {
    max-width: 700px;
    margin: 0 auto 50px;
    text-align: center;
}

.prereq-title {
    font-family: 'Orbitron', sans-serif;
    margin-bottom: 25px;
}

.prereq-grid {
    display: flex;
    justify-content: center;
    gap: 30px;
    flex-wrap: wrap;
}

.prereq-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 10px;
}

.prereq-icon {
    width: 50px;
    height: 50px;
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.prereq-icon.java {
    background: linear-gradient(135deg, #f89820, #e76f00);
}

.prereq-icon.arduino {
    background: linear-gradient(135deg, #00979D, #00878F);
}

.prereq-icon.led {
    background: var(--gradient-rainbow);
}

.prereq-icon.board {
    background: linear-gradient(135deg, #333, #555);
}

.prereq-item span {
    font-size: 0.9rem;
    color: var(--text-secondary);
}

/* Steps */
.steps-container {
    max-width: 800px;
    margin: 0 auto;
}

.step-card {
    display: flex;
    gap: 25px;
    margin-bottom: 40px;
    padding: 30px;
    background: var(--bg-card);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 20px;
    transition: var(--transition-medium);
}

.step-card:hover {
    border-color: var(--neon-cyan);
}

.step-num {
    flex-shrink: 0;
    width: 50px;
    height: 50px;
    background: var(--gradient-neon);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-family: 'Orbitron', sans-serif;
    font-size: 1.2rem;
    font-weight: 700;
    color: var(--bg-dark);
}

.step-content {
    flex: 1;
}

.step-content h4 {
    font-family: 'Orbitron', sans-serif;
    font-size: 1.1rem;
    margin-bottom: 15px;
}

/* Code Blocks */
.code-block {
    background: rgba(0, 0, 0, 0.5);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 12px;
    overflow: hidden;
    margin-bottom: 15px;
}

.code-header {
    display: flex;
    justify-content: space-between;
    padding: 10px 15px;
    background: rgba(255, 255, 255, 0.05);
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.code-lang {
    font-size: 0.8rem;
    color: var(--neon-cyan);
    font-weight: 600;
}

.code-file {
    font-size: 0.8rem;
    color: var(--text-muted);
}

.code-block pre {
    padding: 15px;
    overflow-x: auto;
    font-family: 'Monaco', 'Menlo', monospace;
    font-size: 0.85rem;
    line-height: 1.6;
}

.code-block code {
    color: var(--text-primary);
}

.code-block .keyword { color: var(--neon-magenta); }
.code-block .number { color: var(--neon-orange); }
.code-block .comment { color: var(--text-muted); }

.code-block.mini {
    margin: 0;
}

.code-block.mini pre {
    padding: 10px 15px;
}

/* Circuit Diagram */
.circuit-diagram {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 50px;
    padding: 30px;
    background: rgba(0, 0, 0, 0.3);
    border-radius: 15px;
    margin-bottom: 15px;
}

.arduino-board {
    padding: 20px;
    background: linear-gradient(135deg, #1a1a2e, #16213e);
    border: 2px solid #00979D;
    border-radius: 10px;
}

.board-label {
    display: block;
    text-align: center;
    font-family: 'Orbitron', sans-serif;
    font-size: 0.8rem;
    color: #00979D;
    margin-bottom: 15px;
}

.pins {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.pin {
    display: flex;
    align-items: center;
    gap: 10px;
}

.pin-label {
    font-family: monospace;
    font-size: 0.8rem;
    color: var(--text-secondary);
    width: 35px;
}

.pin-wire {
    width: 60px;
    height: 3px;
    border-radius: 2px;
}

.pin-wire.red { background: var(--neon-red); box-shadow: 0 0 10px var(--neon-red); }
.pin-wire.green { background: var(--neon-green); box-shadow: 0 0 10px var(--neon-green); }
.pin-wire.blue { background: var(--neon-blue); box-shadow: 0 0 10px var(--neon-blue); }
.pin-wire.black { background: #444; }

.led-module {
    position: relative;
    width: 60px;
    height: 60px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.led-glow {
    width: 40px;
    height: 40px;
    background: var(--gradient-rainbow);
    border-radius: 50%;
    animation: ledGlow 2s ease-in-out infinite;
}

@keyframes ledGlow {
    0%, 100% {
        box-shadow: 0 0 20px var(--neon-red), 0 0 40px var(--neon-red);
    }
    33% {
        box-shadow: 0 0 20px var(--neon-green), 0 0 40px var(--neon-green);
    }
    66% {
        box-shadow: 0 0 20px var(--neon-blue), 0 0 40px var(--neon-blue);
    }
}

.led-label {
    position: absolute;
    bottom: -25px;
    font-size: 0.8rem;
    color: var(--text-muted);
    white-space: nowrap;
}

.circuit-note {
    font-size: 0.85rem;
    color: var(--text-muted);
    text-align: center;
}

/* Platform Tabs */
.platform-tabs {
    display: flex;
    gap: 10px;
    margin-bottom: 15px;
}

.platform-tab {
    padding: 8px 20px;
    background: var(--bg-glass);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 20px;
    color: var(--text-secondary);
    font-family: 'Rajdhani', sans-serif;
    font-size: 0.9rem;
    cursor: pointer;
    transition: var(--transition-fast);
}

.platform-tab:hover {
    border-color: var(--neon-cyan);
}

.platform-tab.active {
    background: var(--neon-cyan);
    color: var(--bg-dark);
    border-color: var(--neon-cyan);
}

.platform-content {
    display: none;
    padding: 15px;
    background: rgba(0, 0, 0, 0.3);
    border-radius: 10px;
}

.platform-content.active {
    display: block;
}

.platform-content ol {
    margin-left: 20px;
    color: var(--text-secondary);
}

.platform-content li {
    margin-bottom: 5px;
}

.link-neon {
    color: var(--neon-cyan);
    text-decoration: underline;
}

/* Success Indicator */
.success-indicator {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 15px;
    background: rgba(0, 255, 136, 0.1);
    border: 1px solid var(--neon-green);
    border-radius: 10px;
    color: var(--neon-green);
}

.pulse-dot {
    width: 10px;
    height: 10px;
    background: var(--neon-green);
    border-radius: 50%;
    animation: pulse 1.5s infinite;
}

/* Download Section */
.download-section {
    text-align: center;
    margin-top: 50px;
}

.btn-download {
    background: linear-gradient(135deg, var(--neon-green), var(--neon-cyan));
    color: var(--bg-dark);
    font-size: 1.1rem;
    padding: 16px 40px;
}

.btn-download:hover {
    box-shadow: 0 0 30px var(--neon-green);
    transform: translateY(-3px);
    color: var(--bg-dark);
}

/* ============================================
   Demo Section
   ============================================ */
.demo {
    background: var(--bg-darker);
}

.demo-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(400px, 1fr));
    gap: 30px;
    max-width: 1000px;
    margin: 0 auto;
}

.demo-card {
    background: var(--bg-card);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 20px;
    overflow: hidden;
    transition: var(--transition-medium);
}

.demo-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.3);
    border-color: var(--neon-magenta);
}

.demo-video {
    position: relative;
    aspect-ratio: 16/9;
    overflow: hidden;
}

.video-link {
    display: block;
    width: 100%;
    height: 100%;
}

.demo-video img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: var(--transition-medium);
}

.demo-card:hover .demo-video img {
    transform: scale(1.05);
}

.play-button {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 70px;
    height: 70px;
    background: rgba(0, 0, 0, 0.7);
    border: 3px solid var(--neon-magenta);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--neon-magenta);
    transition: var(--transition-medium);
}

.play-button svg {
    width: 30px;
    height: 30px;
    margin-left: 5px;
}

.demo-card:hover .play-button {
    background: var(--neon-magenta);
    color: var(--bg-dark);
    box-shadow: var(--glow-magenta);
}

.demo-info {
    padding: 25px;
}

.demo-info h3 {
    font-family: 'Orbitron', sans-serif;
    font-size: 1.1rem;
    margin-bottom: 8px;
}

.demo-info p {
    color: var(--text-secondary);
    font-size: 0.9rem;
}

/* ============================================
   Tech Stack Section
   ============================================ */
.tech-stack {
    background: var(--bg-dark);
    padding: 80px 0;
}

.tech-grid {
    display: flex;
    justify-content: center;
    flex-wrap: wrap;
    gap: 40px;
}

.tech-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 10px;
    padding: 25px;
    background: var(--bg-card);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 15px;
    min-width: 130px;
    transition: var(--transition-medium);
}

.tech-item:hover {
    transform: translateY(-5px);
    border-color: var(--neon-cyan);
}

.tech-icon {
    width: 50px;
    height: 50px;
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
}

.tech-icon.java-icon {
    background: linear-gradient(135deg, #f89820, #e76f00);
}

.tech-icon.arduino-icon {
    background: linear-gradient(135deg, #00979D, #00878F);
}

.tech-icon.processing-icon {
    background: linear-gradient(135deg, #006699, #004466);
}

.tech-icon.minim-icon {
    background: linear-gradient(135deg, var(--neon-cyan), var(--neon-blue));
}

.tech-icon.rxtx-icon {
    background: linear-gradient(135deg, #666, #444);
}

.tech-name {
    font-family: 'Orbitron', sans-serif;
    font-size: 0.95rem;
}

.tech-role {
    font-size: 0.8rem;
    color: var(--text-muted);
}

/* ============================================
   CTA Section
   ============================================ */
.cta {
    background: linear-gradient(135deg, rgba(139, 92, 246, 0.1), rgba(0, 255, 255, 0.05));
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.cta-content {
    text-align: center;
    max-width: 600px;
    margin: 0 auto;
}

.cta-title {
    font-family: 'Orbitron', sans-serif;
    font-size: clamp(1.5rem, 4vw, 2.2rem);
    margin-bottom: 15px;
}

.cta-subtitle {
    color: var(--text-secondary);
    margin-bottom: 30px;
}

.cta-buttons {
    display: flex;
    gap: 20px;
    justify-content: center;
    flex-wrap: wrap;
}

.btn-sponsor {
    background: linear-gradient(135deg, #EA4AAA, #ff6b9d);
    color: white;
}

.btn-sponsor:hover {
    box-shadow: 0 0 30px rgba(234, 74, 170, 0.5);
    transform: translateY(-3px);
    color: white;
}

/* ============================================
   Footer
   ============================================ */
.footer {
    background: var(--bg-darker);
    padding: 60px 0 30px;
}

.footer-content {
    display: flex;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: 40px;
    padding-bottom: 40px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.footer-brand {
    max-width: 250px;
}

.footer-logo {
    width: 40px;
    height: 40px;
    margin-bottom: 10px;
}

.footer-name {
    font-family: 'Orbitron', sans-serif;
    font-size: 1.3rem;
    display: block;
    margin-bottom: 5px;
    background: var(--gradient-neon);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.footer-tagline {
    color: var(--text-muted);
    font-size: 0.9rem;
}

.footer-links {
    display: flex;
    gap: 60px;
    flex-wrap: wrap;
}

.footer-col h4 {
    font-family: 'Orbitron', sans-serif;
    font-size: 0.9rem;
    margin-bottom: 15px;
    color: var(--text-primary);
}

.footer-col a {
    display: block;
    color: var(--text-secondary);
    font-size: 0.9rem;
    padding: 5px 0;
    transition: var(--transition-fast);
}

.footer-col a:hover {
    color: var(--neon-cyan);
    padding-left: 5px;
}

.footer-bottom {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 20px;
    padding-top: 30px;
}

.footer-bottom p {
    color: var(--text-muted);
    font-size: 0.9rem;
}

.heart {
    color: var(--neon-magenta);
    animation: heartbeat 1s ease-in-out infinite;
}

@keyframes heartbeat {
    0%, 100% { transform: scale(1); }
    50% { transform: scale(1.2); }
}

.footer-badges {
    display: flex;
    gap: 10px;
}

.footer-badges img {
    height: 20px;
}

/* ============================================
   Animations (AOS replacements)
   ============================================ */
[data-aos] {
    opacity: 0;
    transition: opacity 0.6s ease, transform 0.6s ease;
}

[data-aos="fade-up"] {
    transform: translateY(30px);
}

[data-aos="fade-right"] {
    transform: translateX(-30px);
}

[data-aos="zoom-in"] {
    transform: scale(0.9);
}

[data-aos].aos-animate {
    opacity: 1;
    transform: translateY(0) translateX(0) scale(1);
}

/* ============================================
   Responsive Design
   ============================================ */
@media (max-width: 992px) {
    .nav-menu {
        position: fixed;
        top: 70px;
        left: 0;
        right: 0;
        background: rgba(10, 10, 15, 0.98);
        flex-direction: column;
        padding: 30px 20px;
        gap: 20px;
        transform: translateY(-150%);
        transition: var(--transition-medium);
        border-bottom: 1px solid rgba(255, 255, 255, 0.1);
    }

    .nav-menu.active {
        transform: translateY(0);
    }

    .nav-toggle {
        display: flex;
    }

    .pipeline-infographic {
        flex-direction: column;
    }

    .pipeline-arrow {
        transform: rotate(90deg);
    }

    .circuit-diagram {
        flex-direction: column;
        gap: 30px;
    }

    .demo-grid {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 768px) {
    :root {
        --section-padding: 60px 0;
    }

    .hero {
        padding: 100px 20px 40px;
    }

    .hero-stats {
        gap: 30px;
    }

    .stat-value {
        font-size: 2rem;
    }

    .waveform-container {
        height: 100px;
    }

    .wave-bar {
        width: 5px;
    }

    .features-grid {
        grid-template-columns: 1fr;
    }

    .step-card {
        flex-direction: column;
        text-align: center;
    }

    .footer-content {
        flex-direction: column;
        text-align: center;
    }

    .footer-links {
        justify-content: center;
    }

    .footer-bottom {
        flex-direction: column;
        text-align: center;
    }
}

@media (max-width: 480px) {
    .hero-title {
        font-size: 2.5rem;
    }

    .hero-buttons {
        flex-direction: column;
    }

    .btn {
        width: 100%;
        justify-content: center;
    }

    .platform-tabs {
        flex-wrap: wrap;
    }

    .spectrum-colors {
        flex-wrap: wrap;
        gap: 20px;
        justify-content: center;
    }

    .color-marker::before {
        position: static;
        margin-bottom: 5px;
    }
}

/* ============================================
   Utilities
   ============================================ */
.visually-hidden {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    border: 0;
}

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

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

::-webkit-scrollbar-thumb {
    background: linear-gradient(var(--neon-cyan), var(--neon-magenta));
    border-radius: 5px;
}

::-webkit-scrollbar-thumb:hover {
    background: linear-gradient(var(--neon-magenta), var(--neon-cyan));
}