/* ===========================================
   NYA-IY - DIY nyanBOX Build Guide
   Retro CRT Terminal Aesthetic
   =========================================== */

:root {
    /* Neon Color Palette */
    --neon-pink: #ff2d6a;
    --neon-cyan: #00fff5;
    --neon-lime: #39ff14;
    --neon-purple: #bf00ff;
    --neon-orange: #ff6b2b;
    --neon-yellow: #ffea00;
    
    /* Base Colors */
    --bg-dark: #0a0a0f;
    --bg-darker: #050508;
    --bg-card: #12121a;
    --bg-card-hover: #1a1a25;
    --text-primary: #e8e8f0;
    --text-secondary: #8888aa;
    --text-dim: #555566;
    
    /* Accent */
    --accent: var(--neon-cyan);
    --accent-alt: var(--neon-pink);
    
    /* Spacing */
    --space-xs: 0.5rem;
    --space-sm: 1rem;
    --space-md: 2rem;
    --space-lg: 4rem;
    --space-xl: 6rem;
    
    /* Typography */
    --font-display: 'Orbitron', sans-serif;
    --font-mono: 'VT323', monospace;
    --font-body: 'JetBrains Mono', monospace;
    
    /* Effects */
    --glow-cyan: 0 0 20px rgba(0, 255, 245, 0.5), 0 0 40px rgba(0, 255, 245, 0.2);
    --glow-pink: 0 0 20px rgba(255, 45, 106, 0.5), 0 0 40px rgba(255, 45, 106, 0.2);
    --border-radius: 4px;
}

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

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

body {
    font-family: var(--font-body);
    background: var(--bg-dark);
    color: var(--text-primary);
    line-height: 1.7;
    overflow-x: hidden;
    position: relative;
}

/* CRT Effects */
.scanlines {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    z-index: 9999;
    background: repeating-linear-gradient(
        0deg,
        rgba(0, 0, 0, 0.15) 0px,
        rgba(0, 0, 0, 0.15) 1px,
        transparent 1px,
        transparent 2px
    );
    opacity: 0.4;
}

.crt-flicker {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    z-index: 9998;
    background: radial-gradient(ellipse at center, transparent 0%, rgba(0,0,0,0.3) 100%);
    animation: flicker 0.15s infinite;
}

@keyframes flicker {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.98; }
}

/* Container */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--space-md);
}

/* Navigation */
.nav {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background: rgba(10, 10, 15, 0.95);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid rgba(0, 255, 245, 0.2);
    padding: var(--space-sm) var(--space-md);
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.nav-brand {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.brand-icon {
    font-size: 1.5rem;
    animation: pulse-glow 2s ease-in-out infinite;
}

@keyframes pulse-glow {
    0%, 100% { filter: drop-shadow(0 0 5px var(--neon-cyan)); }
    50% { filter: drop-shadow(0 0 15px var(--neon-cyan)); }
}

.brand-text {
    font-family: var(--font-display);
    font-size: 1.5rem;
    font-weight: 900;
    letter-spacing: 2px;
    background: linear-gradient(135deg, var(--neon-cyan), var(--neon-pink));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.nav-links {
    display: flex;
    gap: var(--space-md);
}

.nav-link {
    font-family: var(--font-mono);
    font-size: 1.2rem;
    color: var(--text-secondary);
    text-decoration: none;
    position: relative;
    transition: color 0.3s;
}

.nav-link::before {
    content: '>';
    opacity: 0;
    margin-right: 0.25rem;
    color: var(--neon-cyan);
    transition: opacity 0.3s;
}

.nav-link:hover {
    color: var(--neon-cyan);
}

.nav-link:hover::before {
    opacity: 1;
}

.nav-toggle {
    display: none;
    flex-direction: column;
    gap: 4px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 0.5rem;
}

.nav-toggle span {
    width: 24px;
    height: 2px;
    background: var(--neon-cyan);
    transition: 0.3s;
}

/* Hero Section */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    padding-top: 80px;
}

.hero-bg {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    overflow: hidden;
}

.grid-lines {
    position: absolute;
    width: 100%;
    height: 100%;
    background-image: 
        linear-gradient(rgba(0, 255, 245, 0.03) 1px, transparent 1px),
        linear-gradient(90deg, rgba(0, 255, 245, 0.03) 1px, transparent 1px);
    background-size: 50px 50px;
    animation: grid-scroll 20s linear infinite;
}

@keyframes grid-scroll {
    0% { transform: perspective(500px) rotateX(60deg) translateY(0); }
    100% { transform: perspective(500px) rotateX(60deg) translateY(50px); }
}

.floating-icons {
    position: absolute;
    width: 100%;
    height: 100%;
}

.float-icon {
    position: absolute;
    font-size: 2rem;
    opacity: 0.15;
    animation: float 10s ease-in-out infinite;
    animation-delay: var(--delay);
    left: var(--x);
    top: 20%;
}

@keyframes float {
    0%, 100% { transform: translateY(0) rotate(0deg); }
    25% { transform: translateY(-30px) rotate(5deg); }
    50% { transform: translateY(-10px) rotate(-5deg); }
    75% { transform: translateY(-40px) rotate(3deg); }
}

.hero-content {
    text-align: center;
    position: relative;
    z-index: 10;
    padding: var(--space-md);
}

/* Glitch Effect */
.glitch-container {
    position: relative;
}

.hero-title {
    font-family: var(--font-display);
    font-size: clamp(4rem, 15vw, 10rem);
    font-weight: 900;
    letter-spacing: 8px;
    color: var(--text-primary);
    text-shadow: var(--glow-cyan);
    position: relative;
}

.glitch::before,
.glitch::after {
    content: attr(data-text);
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
}

.glitch::before {
    animation: glitch-1 0.3s infinite linear alternate-reverse;
    color: var(--neon-cyan);
    z-index: -1;
}

.glitch::after {
    animation: glitch-2 0.3s infinite linear alternate-reverse;
    color: var(--neon-pink);
    z-index: -2;
}

@keyframes glitch-1 {
    0%, 100% { clip-path: inset(0 0 95% 0); transform: translate(-2px, -2px); }
    20% { clip-path: inset(30% 0 50% 0); transform: translate(2px, 2px); }
    40% { clip-path: inset(60% 0 20% 0); transform: translate(-2px, 0); }
    60% { clip-path: inset(80% 0 5% 0); transform: translate(0, 2px); }
    80% { clip-path: inset(10% 0 70% 0); transform: translate(2px, -2px); }
}

@keyframes glitch-2 {
    0%, 100% { clip-path: inset(95% 0 0 0); transform: translate(2px, 2px); }
    20% { clip-path: inset(50% 0 30% 0); transform: translate(-2px, -2px); }
    40% { clip-path: inset(20% 0 60% 0); transform: translate(2px, 0); }
    60% { clip-path: inset(5% 0 80% 0); transform: translate(0, -2px); }
    80% { clip-path: inset(70% 0 10% 0); transform: translate(-2px, 2px); }
}

.hero-subtitle {
    font-family: var(--font-mono);
    font-size: 1.8rem;
    color: var(--neon-lime);
    margin: var(--space-sm) 0;
    min-height: 2.5rem;
}

.cursor {
    animation: blink 1s step-end infinite;
}

@keyframes blink {
    0%, 50% { opacity: 1; }
    51%, 100% { opacity: 0; }
}

.hero-desc {
    font-size: 1.1rem;
    color: var(--text-secondary);
    max-width: 600px;
    margin: var(--space-md) auto;
    line-height: 1.8;
}

.hero-cta {
    display: flex;
    gap: var(--space-md);
    justify-content: center;
    flex-wrap: wrap;
    margin-top: var(--space-lg);
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 1rem 2rem;
    font-family: var(--font-mono);
    font-size: 1.2rem;
    text-decoration: none;
    border: none;
    border-radius: var(--border-radius);
    cursor: pointer;
    transition: all 0.3s;
    position: relative;
    overflow: hidden;
}

.btn-icon {
    font-size: 1.4rem;
}

.btn-primary {
    background: linear-gradient(135deg, var(--neon-cyan), var(--neon-lime));
    color: var(--bg-dark);
    font-weight: 600;
}

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

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

.btn-secondary:hover {
    background: rgba(255, 45, 106, 0.1);
    box-shadow: var(--glow-pink);
    transform: translateY(-2px);
}

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

/* Scroll Indicator */
.scroll-indicator {
    position: absolute;
    bottom: var(--space-lg);
    left: 50%;
    transform: translateX(-50%);
    text-align: center;
    color: var(--text-dim);
    font-family: var(--font-mono);
    font-size: 0.9rem;
}

.scroll-arrow {
    animation: bounce 2s infinite;
    font-size: 1.5rem;
    margin-top: 0.5rem;
}

@keyframes bounce {
    0%, 20%, 50%, 80%, 100% { transform: translateY(0); }
    40% { transform: translateY(10px); }
    60% { transform: translateY(5px); }
}

/* Sections */
.section {
    padding: var(--space-xl) 0;
}

.section-dark {
    background: var(--bg-dark);
}

.section-accent {
    background: linear-gradient(180deg, var(--bg-darker) 0%, var(--bg-dark) 100%);
    border-top: 1px solid rgba(0, 255, 245, 0.1);
    border-bottom: 1px solid rgba(0, 255, 245, 0.1);
}

.section-glow {
    background: var(--bg-dark);
    position: relative;
}

.section-glow::before {
    content: '';
    position: absolute;
    top: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 80%;
    height: 1px;
    background: linear-gradient(90deg, transparent, var(--neon-cyan), transparent);
}

.section-header {
    text-align: center;
    margin-bottom: var(--space-lg);
}

.section-tag {
    font-family: var(--font-mono);
    font-size: 1rem;
    color: var(--neon-lime);
    letter-spacing: 2px;
}

.section-title {
    font-family: var(--font-display);
    font-size: clamp(2rem, 5vw, 3.5rem);
    font-weight: 700;
    margin: var(--space-sm) 0;
    background: linear-gradient(135deg, var(--text-primary), var(--neon-cyan));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

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

/* Feature Grid */
.feature-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: var(--space-md);
}

.feature-card {
    background: var(--bg-card);
    border: 1px solid rgba(255, 255, 255, 0.05);
    border-radius: var(--border-radius);
    padding: var(--space-md);
    transition: all 0.3s;
    position: relative;
    overflow: hidden;
}

.feature-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 3px;
    background: linear-gradient(90deg, var(--neon-cyan), var(--neon-pink));
    transform: scaleX(0);
    transition: transform 0.3s;
}

.feature-card:hover {
    background: var(--bg-card-hover);
    border-color: rgba(0, 255, 245, 0.2);
    transform: translateY(-5px);
}

.feature-card:hover::before {
    transform: scaleX(1);
}

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

.feature-card h3 {
    font-family: var(--font-display);
    font-size: 1.3rem;
    margin-bottom: var(--space-sm);
    color: var(--neon-cyan);
}

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

.feature-list li {
    padding: 0.4rem 0;
    padding-left: 1.5rem;
    position: relative;
    color: var(--text-secondary);
    font-size: 0.95rem;
}

.feature-list li::before {
    content: '›';
    position: absolute;
    left: 0;
    color: var(--neon-pink);
    font-weight: bold;
}

/* BOM Section */
.bom-container {
    display: flex;
    flex-direction: column;
    gap: var(--space-md);
}

.bom-table-wrap {
    overflow-x: auto;
    border-radius: var(--border-radius);
    border: 1px solid rgba(0, 255, 245, 0.2);
}

.bom-table {
    width: 100%;
    border-collapse: collapse;
    font-family: var(--font-mono);
}

.bom-table th {
    background: rgba(0, 255, 245, 0.1);
    padding: var(--space-sm) var(--space-md);
    text-align: left;
    font-family: var(--font-display);
    font-size: 0.9rem;
    letter-spacing: 1px;
    color: var(--neon-cyan);
    border-bottom: 1px solid rgba(0, 255, 245, 0.2);
}

.bom-row {
    transition: background 0.3s;
}

.bom-row:hover {
    background: rgba(0, 255, 245, 0.05);
}

.bom-table td {
    padding: var(--space-sm) var(--space-md);
    border-bottom: 1px solid rgba(255, 255, 255, 0.05);
    font-size: 1.1rem;
}

.component-icon {
    margin-right: 0.5rem;
}

.bom-tips {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: var(--space-md);
}

.tip-card {
    background: var(--bg-card);
    border-left: 3px solid var(--neon-lime);
    padding: var(--space-md);
    border-radius: 0 var(--border-radius) var(--border-radius) 0;
}

.tip-icon {
    font-size: 1.5rem;
    display: block;
    margin-bottom: 0.5rem;
}

.tip-card h4 {
    font-family: var(--font-display);
    color: var(--neon-lime);
    margin-bottom: 0.5rem;
}

.tip-card p {
    color: var(--text-secondary);
    font-size: 0.95rem;
}

/* Wiring Section */
.wiring-container {
    display: grid;
    grid-template-columns: auto 1fr;
    gap: var(--space-lg);
    align-items: start;
}

.pinout-visual {
    position: sticky;
    top: 100px;
}

.esp32-chip {
    background: #1a1a25;
    border: 2px solid var(--neon-cyan);
    border-radius: 8px;
    padding: var(--space-md);
    min-width: 200px;
    box-shadow: 0 0 30px rgba(0, 255, 245, 0.2);
}

.chip-label {
    text-align: center;
    font-family: var(--font-display);
    font-size: 0.8rem;
    color: var(--neon-cyan);
    margin-bottom: var(--space-sm);
    letter-spacing: 1px;
}

.pins-left, .pins-right {
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.pin {
    display: flex;
    align-items: center;
    font-family: var(--font-mono);
    font-size: 0.9rem;
    gap: 8px;
}

.pins-right .pin {
    justify-content: flex-end;
}

.pin-num {
    background: #252535;
    padding: 2px 8px;
    border-radius: 2px;
    min-width: 40px;
    text-align: center;
}

.pin-wire {
    width: 30px;
    height: 3px;
    border-radius: 2px;
}

.pin-wire.power { background: #ff3333; }
.pin-wire.ground { background: #333333; }
.pin-wire.radio1 { background: var(--neon-cyan); }
.pin-wire.radio2 { background: var(--neon-pink); }
.pin-wire.radio3 { background: var(--neon-purple); }
.pin-wire.spi { background: var(--neon-orange); }
.pin-wire.i2c { background: var(--neon-lime); }
.pin-wire.button { background: var(--neon-yellow); }
.pin-wire.led { background: #ffffff; }

.wiring-tables {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--space-md);
}

.wiring-group {
    background: var(--bg-card);
    border-radius: var(--border-radius);
    padding: var(--space-md);
    border: 1px solid rgba(255, 255, 255, 0.05);
}

.wiring-group h3 {
    font-family: var(--font-display);
    font-size: 1rem;
    color: var(--text-primary);
    margin-bottom: var(--space-sm);
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.group-icon {
    font-size: 1.2rem;
}

.wiring-table {
    width: 100%;
    border-collapse: collapse;
    font-family: var(--font-mono);
    font-size: 1rem;
}

.wiring-table th {
    background: rgba(0, 255, 245, 0.1);
    padding: 0.5rem;
    text-align: left;
    font-size: 0.8rem;
    color: var(--neon-cyan);
}

.wiring-table td {
    padding: 0.5rem;
    border-bottom: 1px solid rgba(255, 255, 255, 0.05);
}

.wiring-note {
    margin-top: var(--space-sm);
    padding: var(--space-sm);
    background: rgba(0, 255, 245, 0.05);
    border-radius: var(--border-radius);
    font-size: 0.9rem;
    color: var(--text-secondary);
}

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

.tip-block {
    display: flex;
    gap: var(--space-md);
    padding: var(--space-md);
    background: var(--bg-card);
    border-radius: var(--border-radius);
}

.tip-num {
    font-family: var(--font-display);
    font-size: 2rem;
    font-weight: 900;
    color: var(--neon-pink);
    opacity: 0.5;
}

.tip-content h4 {
    font-family: var(--font-display);
    color: var(--text-primary);
    margin-bottom: 0.25rem;
}

.tip-content p {
    color: var(--text-secondary);
    font-size: 0.95rem;
}

/* Firmware Section */
.firmware-methods {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: var(--space-md);
    margin-bottom: var(--space-lg);
}

.method-card {
    background: var(--bg-card);
    border-radius: var(--border-radius);
    padding: var(--space-lg) var(--space-md);
    text-align: center;
    position: relative;
    border: 1px solid rgba(255, 255, 255, 0.05);
    transition: all 0.3s;
}

.method-card:hover {
    border-color: rgba(0, 255, 245, 0.3);
}

.method-easy {
    border-top: 3px solid var(--neon-cyan);
}

.method-advanced {
    border-top: 3px solid var(--neon-pink);
}

.method-badge {
    position: absolute;
    top: -12px;
    left: 50%;
    transform: translateX(-50%);
    background: var(--bg-dark);
    padding: 0.25rem 1rem;
    font-family: var(--font-mono);
    font-size: 0.8rem;
    color: var(--neon-lime);
    border: 1px solid var(--neon-lime);
    border-radius: 20px;
}

.method-icon {
    font-size: 4rem;
    margin-bottom: var(--space-sm);
}

.method-card h3 {
    font-family: var(--font-display);
    font-size: 1.5rem;
    margin-bottom: 0.5rem;
}

.method-card > p {
    color: var(--text-secondary);
    margin-bottom: var(--space-md);
}

.method-steps {
    text-align: left;
    padding-left: 1.5rem;
    margin-bottom: var(--space-md);
}

.method-steps li {
    padding: 0.5rem 0;
    color: var(--text-secondary);
    font-family: var(--font-mono);
}

.method-steps li::marker {
    color: var(--neon-cyan);
}

/* Code Block */
.code-block {
    background: #0d0d12;
    border-radius: var(--border-radius);
    overflow: hidden;
    border: 1px solid rgba(0, 255, 245, 0.2);
    margin-bottom: var(--space-md);
}

.code-header {
    background: rgba(0, 255, 245, 0.1);
    padding: 0.75rem var(--space-md);
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.code-dot {
    width: 12px;
    height: 12px;
    border-radius: 50%;
    background: #555;
}

.code-dot:nth-child(1) { background: #ff5f56; }
.code-dot:nth-child(2) { background: #ffbd2e; }
.code-dot:nth-child(3) { background: #27c93f; }

.code-title {
    margin-left: auto;
    font-family: var(--font-mono);
    font-size: 0.9rem;
    color: var(--text-secondary);
}

.code-content {
    padding: var(--space-md);
    overflow-x: auto;
    font-family: var(--font-mono);
    font-size: 0.95rem;
    line-height: 1.6;
}

.code-content code {
    color: var(--neon-lime);
}

/* Troubleshoot */
.troubleshoot-box {
    background: var(--bg-card);
    border-radius: var(--border-radius);
    padding: var(--space-md);
    border-left: 3px solid var(--neon-orange);
}

.troubleshoot-box h4 {
    font-family: var(--font-display);
    margin-bottom: var(--space-md);
}

.troubleshoot-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: var(--space-md);
}

.troubleshoot-item strong {
    display: block;
    color: var(--text-primary);
    margin-bottom: 0.25rem;
}

.troubleshoot-item p {
    color: var(--text-secondary);
    font-size: 0.95rem;
}

.troubleshoot-item a {
    color: var(--neon-cyan);
    text-decoration: none;
}

.troubleshoot-item a:hover {
    text-decoration: underline;
}

/* Case Section */
.case-options {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: var(--space-md);
}

.case-card {
    background: var(--bg-card);
    border-radius: var(--border-radius);
    padding: var(--space-md);
    text-align: center;
    border: 1px solid rgba(255, 255, 255, 0.05);
    transition: all 0.3s;
}

.case-card:hover {
    border-color: rgba(0, 255, 245, 0.3);
    transform: translateY(-5px);
}

.case-icon {
    font-size: 4rem;
    margin-bottom: var(--space-sm);
}

.case-card h3 {
    font-family: var(--font-display);
    color: var(--neon-cyan);
    margin-bottom: 0.5rem;
}

.case-card > p {
    color: var(--text-secondary);
    font-size: 0.95rem;
    margin-bottom: var(--space-md);
}

.case-features {
    list-style: none;
    text-align: left;
}

.case-features li {
    padding: 0.3rem 0;
    padding-left: 1.5rem;
    position: relative;
    color: var(--text-secondary);
    font-size: 0.9rem;
}

.case-features li::before {
    content: '✓';
    position: absolute;
    left: 0;
    color: var(--neon-lime);
}

/* Warning Section */
.section-warning {
    background: linear-gradient(180deg, var(--bg-dark), #1a0a0f);
    padding: var(--space-lg) 0;
}

.warning-box {
    background: rgba(255, 45, 106, 0.05);
    border: 1px solid rgba(255, 45, 106, 0.3);
    border-radius: var(--border-radius);
    padding: var(--space-lg);
    text-align: center;
    max-width: 800px;
    margin: 0 auto;
}

.warning-icon {
    font-size: 4rem;
    margin-bottom: var(--space-sm);
}

.warning-box h3 {
    font-family: var(--font-display);
    font-size: 1.5rem;
    color: var(--neon-pink);
    margin-bottom: var(--space-sm);
}

.warning-list {
    list-style: none;
    display: inline-block;
    text-align: left;
    margin: var(--space-md) 0;
}

.warning-list li {
    padding: 0.5rem 0;
    padding-left: 2rem;
    position: relative;
    color: var(--text-secondary);
}

.warning-list li::before {
    content: '⚠';
    position: absolute;
    left: 0;
}

.warning-footer {
    color: var(--text-dim);
    font-size: 0.9rem;
    font-style: italic;
}

/* Footer */
.footer {
    background: var(--bg-darker);
    border-top: 1px solid rgba(0, 255, 245, 0.1);
    padding: var(--space-lg) 0 var(--space-md);
}

.footer-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: var(--space-md);
    margin-bottom: var(--space-md);
}

.footer-tagline {
    color: var(--text-dim);
    font-size: 0.9rem;
    margin-top: 0.25rem;
}

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

.footer-links a {
    font-family: var(--font-mono);
    color: var(--text-secondary);
    text-decoration: none;
    transition: color 0.3s;
}

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

.footer-bottom {
    text-align: center;
    padding-top: var(--space-md);
    border-top: 1px solid rgba(255, 255, 255, 0.05);
}

.footer-bottom p {
    color: var(--text-dim);
    font-size: 0.9rem;
    margin: 0.25rem 0;
}

.footer-bottom a {
    color: var(--neon-cyan);
    text-decoration: none;
}

.footer-bottom a:hover {
    text-decoration: underline;
}

.footer-copy {
    margin-top: var(--space-sm);
}

/* Responsive */
@media (max-width: 900px) {
    .wiring-container {
        grid-template-columns: 1fr;
    }
    
    .pinout-visual {
        position: static;
        display: flex;
        justify-content: center;
    }
}

@media (max-width: 768px) {
    .nav-links {
        display: none;
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        background: rgba(10, 10, 15, 0.98);
        flex-direction: column;
        padding: var(--space-md);
        border-bottom: 1px solid rgba(0, 255, 245, 0.2);
    }
    
    .nav-links.active {
        display: flex;
    }
    
    .nav-toggle {
        display: flex;
    }
    
    .hero-cta {
        flex-direction: column;
        align-items: center;
    }
    
    .btn {
        width: 100%;
        max-width: 300px;
        justify-content: center;
    }
}

@media (max-width: 480px) {
    :root {
        --space-md: 1.5rem;
        --space-lg: 3rem;
        --space-xl: 4rem;
    }
    
    .hero-title {
        letter-spacing: 4px;
    }
    
    .bom-table td, .bom-table th {
        padding: var(--space-xs) var(--space-sm);
        font-size: 0.9rem;
    }
}

/* Animations on scroll */
.feature-card,
.bom-row,
.wiring-group,
.method-card,
.case-card,
.tip-block,
.spectrum-card,
.faq-item {
    opacity: 0;
    transform: translateY(30px);
    animation: fade-in-up 0.6s ease forwards;
}

@keyframes fade-in-up {
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* Stagger delays will be added via JS */

/* ===========================================
   Architecture Diagram Section
   =========================================== */

.architecture-container {
    display: flex;
    justify-content: center;
    overflow-x: auto;
    padding: var(--space-md) 0;
}

.arch-diagram {
    max-width: 100%;
    height: auto;
    min-width: 600px;
    border: 1px solid rgba(0, 255, 245, 0.2);
    border-radius: var(--border-radius);
    background: #0a0a0f;
}

/* ===========================================
   Spectrum Diagram Section
   =========================================== */

.spectrum-container {
    display: flex;
    flex-direction: column;
    gap: var(--space-lg);
}

.spectrum-diagram {
    width: 100%;
    max-width: 100%;
    height: auto;
    border: 1px solid rgba(0, 255, 245, 0.2);
    border-radius: var(--border-radius);
}

.spectrum-info {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
    gap: var(--space-md);
}

.spectrum-card {
    background: var(--bg-card);
    border: 1px solid rgba(255, 255, 255, 0.05);
    border-radius: var(--border-radius);
    padding: var(--space-md);
    transition: all 0.3s;
}

.spectrum-card:hover {
    border-color: rgba(0, 255, 245, 0.3);
    transform: translateY(-3px);
}

.spectrum-icon {
    font-size: 2rem;
    display: block;
    margin-bottom: var(--space-sm);
}

.spectrum-card h4 {
    font-family: var(--font-display);
    color: var(--neon-cyan);
    margin-bottom: 0.5rem;
    font-size: 1.1rem;
}

.spectrum-card p {
    color: var(--text-secondary);
    font-size: 0.95rem;
    line-height: 1.6;
}

/* ===========================================
   Comparison Table Section
   =========================================== */

.compare-table-wrap {
    overflow-x: auto;
    border-radius: var(--border-radius);
    border: 1px solid rgba(0, 255, 245, 0.2);
    margin-bottom: var(--space-md);
}

.compare-table {
    width: 100%;
    border-collapse: collapse;
    font-family: var(--font-mono);
    min-width: 700px;
}

.compare-table th {
    background: rgba(0, 255, 245, 0.1);
    padding: var(--space-sm) var(--space-md);
    text-align: center;
    font-family: var(--font-display);
    font-size: 0.9rem;
    letter-spacing: 1px;
    color: var(--text-primary);
    border-bottom: 2px solid rgba(0, 255, 245, 0.2);
    white-space: nowrap;
}

.compare-table th:first-child {
    text-align: left;
}

.compare-table th.highlight-col {
    background: rgba(0, 255, 245, 0.2);
    color: var(--neon-cyan);
}

.compare-table td {
    padding: var(--space-sm) var(--space-md);
    border-bottom: 1px solid rgba(255, 255, 255, 0.05);
    text-align: center;
    font-size: 1rem;
    color: var(--text-secondary);
}

.compare-table td:first-child {
    text-align: left;
    color: var(--text-primary);
}

.compare-table td.highlight-col {
    background: rgba(0, 255, 245, 0.05);
    color: var(--text-primary);
}

.compare-table tbody tr:hover {
    background: rgba(0, 255, 245, 0.03);
}

.badge {
    display: inline-block;
    padding: 0.2rem 0.6rem;
    border-radius: 20px;
    font-size: 0.85rem;
    font-weight: 600;
}

.badge-good {
    background: rgba(57, 255, 20, 0.2);
    color: var(--neon-lime);
    border: 1px solid var(--neon-lime);
}

.compare-note {
    display: flex;
    align-items: flex-start;
    gap: var(--space-sm);
    padding: var(--space-md);
    background: var(--bg-card);
    border-left: 3px solid var(--neon-cyan);
    border-radius: 0 var(--border-radius) var(--border-radius) 0;
}

.note-icon {
    font-size: 1.5rem;
    flex-shrink: 0;
}

.compare-note p {
    color: var(--text-secondary);
    font-size: 0.95rem;
    line-height: 1.6;
}

.compare-note strong {
    color: var(--text-primary);
}

/* ===========================================
   FAQ Section
   =========================================== */

.faq-container {
    max-width: 800px;
    margin: 0 auto;
    display: flex;
    flex-direction: column;
    gap: var(--space-sm);
}

.faq-item {
    background: var(--bg-card);
    border: 1px solid rgba(255, 255, 255, 0.05);
    border-radius: var(--border-radius);
    overflow: hidden;
    transition: all 0.3s;
}

.faq-item:hover {
    border-color: rgba(0, 255, 245, 0.2);
}

.faq-item.active {
    border-color: var(--neon-cyan);
}

.faq-question {
    width: 100%;
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    padding: var(--space-md);
    background: transparent;
    border: none;
    cursor: pointer;
    font-family: var(--font-body);
    font-size: 1rem;
    color: var(--text-primary);
    text-align: left;
    transition: all 0.3s;
}

.faq-question:hover {
    background: rgba(0, 255, 245, 0.05);
}

.faq-icon {
    font-size: 1.2rem;
    flex-shrink: 0;
}

.faq-question > span:nth-child(2) {
    flex: 1;
    font-weight: 500;
}

.faq-toggle {
    font-family: var(--font-mono);
    font-size: 1.5rem;
    color: var(--neon-cyan);
    transition: transform 0.3s;
    flex-shrink: 0;
}

.faq-item.active .faq-toggle {
    transform: rotate(45deg);
}

.faq-answer {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.4s ease, padding 0.3s ease;
}

.faq-item.active .faq-answer {
    max-height: 500px;
}

.faq-answer p {
    padding: 0 var(--space-md) var(--space-md) var(--space-md);
    padding-left: calc(var(--space-md) + 1.2rem + var(--space-sm));
    color: var(--text-secondary);
    font-size: 0.95rem;
    line-height: 1.8;
}

.faq-answer a {
    color: var(--neon-cyan);
    text-decoration: none;
}

.faq-answer a:hover {
    text-decoration: underline;
}

.faq-answer strong {
    color: var(--text-primary);
}

.faq-answer em {
    color: var(--neon-pink);
    font-style: normal;
}

/* ===========================================
   Responsive adjustments for new sections
   =========================================== */

@media (max-width: 768px) {
    .arch-diagram {
        min-width: 100%;
    }
    
    .compare-table th,
    .compare-table td {
        padding: var(--space-xs) var(--space-sm);
        font-size: 0.85rem;
    }
    
    .faq-question {
        font-size: 0.95rem;
        padding: var(--space-sm);
    }
    
    .faq-answer p {
        padding-left: var(--space-sm);
        font-size: 0.9rem;
    }
}