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

:root {
    /* Color Palette */
    --bg-primary: #0a0a0f;
    --bg-secondary: #1a1a2e;
    --bg-tertiary: #16213e;
    --accent-purple: #7c3aed;
    --accent-blue: #3b82f6;
    --accent-cyan: #06b6d4;
    --accent-pink: #ec4899;
    --text-primary: #ffffff;
    --text-secondary: #a1a1aa;
    --text-muted: #71717a;
    --border-color: #27272a;
    --glow-purple: rgba(124, 58, 237, 0.3);
    --glow-blue: rgba(59, 130, 246, 0.3);
    
    /* Typography */
    --font-primary: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    --font-mono: 'JetBrains Mono', 'Fira Code', monospace;
    
    /* Spacing */
    --container-max: 1200px;
    --section-padding: 120px 0;
    --border-radius: 12px;
    --border-radius-lg: 20px;
    
    /* Animations */
    --transition-smooth: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-spring: all 0.5s cubic-bezier(0.34, 1.56, 0.64, 1);
}

body {
    font-family: var(--font-primary);
    background: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.6;
    overflow-x: hidden;
}

.container {
    max-width: var(--container-max);
    margin: 0 auto;
    padding: 0 2rem;
}

/* Neural Background */
.neural-background {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: -1;
    pointer-events: none;
}

#neural-canvas {
    width: 100%;
    height: 100%;
    opacity: 0.4;
}

/* Typography */
.section-title {
    font-size: clamp(2.5rem, 5vw, 4rem);
    font-weight: 900;
    text-align: center;
    margin-bottom: 3rem;
    line-height: 1.1;
}

.gradient-text {
    background: linear-gradient(135deg, var(--accent-purple), var(--accent-cyan));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    animation: gradient-shift 3s ease-in-out infinite alternate;
}

@keyframes gradient-shift {
    0% { filter: hue-rotate(0deg) brightness(1); }
    100% { filter: hue-rotate(30deg) brightness(1.2); }
}

/* Hero Section */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    position: relative;
    padding: var(--section-padding);
}

.hero-content {
    text-align: center;
    position: relative;
    z-index: 2;
}

.brain-animation {
    position: relative;
    width: 200px;
    height: 200px;
    margin: 0 auto 3rem;
    z-index: 1;
    transition: all 0.3s ease-out;
}

.brain-core {
    width: 80px;
    height: 80px;
    background: linear-gradient(135deg, var(--accent-purple), var(--accent-pink));
    border-radius: 50%;
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    animation: brain-pulse 2s ease-in-out infinite;
    box-shadow: 0 0 40px var(--glow-purple);
}

.neural-pulse {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    border: 2px solid var(--accent-cyan);
    border-radius: 50%;
    animation: neural-pulse-expand 3s ease-out infinite;
}

.pulse-1 {
    width: 120px;
    height: 120px;
    animation-delay: -1s;
}

.pulse-2 {
    width: 160px;
    height: 160px;
    animation-delay: -2s;
}

.pulse-3 {
    width: 200px;
    height: 200px;
    animation-delay: -3s;
}

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

@keyframes neural-pulse-expand {
    0% {
        opacity: 1;
        transform: translate(-50%, -50%) scale(0.8);
    }
    100% {
        opacity: 0;
        transform: translate(-50%, -50%) scale(1.5);
    }
}

.hero-title {
    font-size: clamp(3rem, 8vw, 6rem);
    font-weight: 900;
    margin-bottom: 1.5rem;
    line-height: 1.1;
}

.hero-subtitle {
    font-size: clamp(1.2rem, 3vw, 1.5rem);
    color: var(--text-secondary);
    margin-bottom: 3rem;
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
}

.hero-cta {
    display: flex;
    gap: 1.5rem;
    justify-content: center;
    flex-wrap: wrap;
}

.cta-button {
    display: inline-flex;
    align-items: center;
    padding: 1rem 2rem;
    border-radius: var(--border-radius);
    text-decoration: none;
    font-weight: 600;
    font-size: 1.1rem;
    transition: var(--transition-spring);
    position: relative;
    overflow: hidden;
}

.cta-button.primary {
    background: linear-gradient(135deg, var(--accent-purple), var(--accent-blue));
    color: white;
    box-shadow: 0 8px 32px rgba(124, 58, 237, 0.3);
}

.cta-button.primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 12px 40px rgba(124, 58, 237, 0.5);
}

.cta-button.secondary {
    background: rgba(255, 255, 255, 0.1);
    color: var(--text-primary);
    border: 1px solid var(--border-color);
    backdrop-filter: blur(10px);
}

.cta-button.secondary:hover {
    background: rgba(255, 255, 255, 0.2);
    transform: translateY(-2px);
}

/* Hero Install Section */
.hero-install {
    margin: 3rem 0;
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
}

.hero-install h3 {
    font-size: 1.3rem;
    font-weight: 600;
    margin-bottom: 1rem;
    text-align: center;
    color: var(--accent-cyan);
}

.hero-command {
    margin-bottom: 0.5rem;
}

.install-link {
    display: inline-block;
    color: var(--accent-purple);
    text-decoration: none;
    font-size: 0.95rem;
    margin-top: 0.5rem;
    transition: var(--transition-smooth);
    text-align: center;
    width: 100%;
}

.install-link:hover {
    color: var(--accent-cyan);
}

/* Installation Tabs */
.install-tabs {
    display: flex;
    gap: 0.5rem;
    margin-bottom: 1.5rem;
    justify-content: center;
}

.tab-btn {
    background: rgba(255, 255, 255, 0.1);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    padding: 0.5rem 1rem;
    color: var(--text-secondary);
    cursor: pointer;
    font-size: 0.9rem;
    font-weight: 500;
    transition: var(--transition-smooth);
    backdrop-filter: blur(10px);
}

.tab-btn:hover {
    background: rgba(255, 255, 255, 0.15);
    border-color: var(--accent-purple);
    color: var(--text-primary);
}

.tab-btn.active {
    background: var(--accent-purple);
    border-color: var(--accent-purple);
    color: white;
}

.tab-content {
    display: none;
}

.tab-content.active {
    display: block !important;
}

/* Ensure proper code formatting */
.command-box pre,
.command-box code {
    white-space: pre !important;
    word-wrap: normal;
    overflow-x: auto;
}

/* Why Big Brain Section */
.why-section {
    padding: var(--section-padding);
    background: linear-gradient(180deg, var(--bg-primary) 0%, var(--bg-secondary) 100%);
}

.why-content {
    max-width: 900px;
    margin: 0 auto;
}

.problem-solution {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    margin-bottom: 4rem;
}

.problem-text h2,
.solution-text h2 {
    font-size: 2rem;
    font-weight: 700;
    margin-bottom: 1.5rem;
    color: var(--text-primary);
}

.problem-text h2 {
    color: var(--accent-pink);
}

.solution-text h2 {
    background: linear-gradient(135deg, var(--accent-purple), var(--accent-cyan));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.problem-text p,
.solution-text p {
    color: var(--text-secondary);
    line-height: 1.7;
    font-size: 1.1rem;
}

.how-it-works {
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    padding: 2rem;
    margin-bottom: 3rem;
}

.how-it-works h3 {
    font-size: 1.4rem;
    font-weight: 600;
    margin-bottom: 1.5rem;
    color: var(--text-primary);
}

.simple-steps {
    list-style: none;
    padding: 0;
    margin: 0;
}

.simple-steps li {
    font-size: 1.1rem;
    color: var(--text-secondary);
    margin-bottom: 1rem;
    padding-left: 2rem;
    position: relative;
    line-height: 1.6;
}

.simple-steps li::before {
    content: counter(step-counter);
    counter-increment: step-counter;
    position: absolute;
    left: 0;
    top: 0;
    width: 1.5rem;
    height: 1.5rem;
    background: linear-gradient(135deg, var(--accent-purple), var(--accent-blue));
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.8rem;
    font-weight: bold;
    color: white;
}

.simple-steps {
    counter-reset: step-counter;
}

.value-props {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 1.5rem;
}

.prop {
    display: flex;
    align-items: center;
    gap: 1rem;
    padding: 1.5rem;
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    transition: var(--transition-smooth);
}

.prop:hover {
    border-color: var(--accent-purple);
    transform: translateY(-2px);
}

.prop-icon {
    font-size: 1.5rem;
    min-width: 1.5rem;
}

.prop span:last-child {
    color: var(--text-secondary);
    font-weight: 500;
}


/* Demo Section */
.demo-section {
    padding: var(--section-padding);
    background: var(--bg-tertiary);
}

.video-container {
    margin-top: 4rem;
    max-width: 800px;
    margin-left: auto;
    margin-right: auto;
}

.video-placeholder {
    aspect-ratio: 16/9;
    background: linear-gradient(135deg, var(--bg-primary), var(--bg-secondary));
    border: 2px dashed var(--border-color);
    border-radius: var(--border-radius-lg);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    text-align: center;
    position: relative;
    overflow: hidden;
}

.video-placeholder::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(45deg, transparent 30%, rgba(124, 58, 237, 0.1) 50%, transparent 70%);
    animation: shimmer 3s ease-in-out infinite;
}

@keyframes shimmer {
    0% { transform: translateX(-100%); }
    100% { transform: translateX(100%); }
}

.play-button {
    width: 80px;
    height: 80px;
    background: linear-gradient(135deg, var(--accent-purple), var(--accent-blue));
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 2rem;
    margin-bottom: 1rem;
    cursor: pointer;
    transition: var(--transition-spring);
    box-shadow: 0 8px 32px rgba(124, 58, 237, 0.4);
}

.play-button:hover {
    transform: scale(1.1);
    box-shadow: 0 12px 40px rgba(124, 58, 237, 0.6);
}

/* Installation Section */
.install-section {
    padding: var(--section-padding);
    background: linear-gradient(180deg, var(--bg-tertiary) 0%, var(--bg-primary) 100%);
}

.install-content {
    max-width: 800px;
    margin: 4rem auto 0;
}

.install-command {
    margin-bottom: 3rem;
}

.install-command h3 {
    font-size: 1.5rem;
    font-weight: 700;
    margin-bottom: 1.5rem;
    text-align: center;
}

.command-box {
    position: relative;
    background: var(--bg-primary);
    border: 1px solid var(--accent-purple);
    border-radius: var(--border-radius);
    padding: 1.5rem;
    margin-bottom: 1rem;
    box-shadow: 0 8px 32px rgba(124, 58, 237, 0.2);
}

.command-box pre {
    font-family: var(--font-mono);
    font-size: 0.9rem;
    color: var(--accent-cyan);
    margin: 0;
    padding-right: 3rem;
    overflow-x: auto;
    white-space: nowrap;
    word-break: keep-all;
}

/* Override for multiline content in tabs */
#tab-cursor .command-box pre {
    white-space: pre-wrap;
    word-break: keep-all;
    text-align: left;
}

/* Override for multiline content in optional automation */
.optional-automation .command-box pre {
    white-space: pre-wrap;
    word-wrap: break-word;
    word-break: normal;
    text-align: left;
}

.copy-btn {
    position: absolute;
    top: 1rem;
    right: 1rem;
    background: rgba(255, 255, 255, 0.1);
    border: 1px solid var(--border-color);
    border-radius: 6px;
    padding: 0.5rem;
    color: var(--text-primary);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    width: 2rem;
    height: 2rem;
    transition: var(--transition-smooth);
    backdrop-filter: blur(10px);
}

.copy-btn:hover {
    background: rgba(255, 255, 255, 0.2);
    border-color: var(--accent-purple);
}

.copy-btn.copied {
    background: var(--accent-purple);
    border-color: var(--accent-purple);
}

.copy-icon {
    flex-shrink: 0;
    stroke: currentColor;
}

.copy-text {
    flex-shrink: 0;
}

.install-note {
    text-align: center;
    color: var(--text-secondary);
    font-style: italic;
}

.install-alternatives h4 {
    font-size: 1.3rem;
    font-weight: 600;
    margin-bottom: 1.5rem;
    text-align: center;
}

.alt-commands {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

.alt-command {
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    padding: 1.5rem;
}

.alt-command h5 {
    font-size: 1rem;
    font-weight: 600;
    margin-bottom: 1rem;
    color: var(--accent-cyan);
}

.alt-command .command-box {
    margin-bottom: 0;
}

.alt-command pre {
    font-family: var(--font-mono);
    font-size: 0.85rem;
    color: var(--text-secondary);
    background: var(--bg-primary);
    padding: 1rem;
    border-radius: 6px;
    overflow-x: auto;
    padding-right: 3rem;
    white-space: pre-wrap;
    word-break: keep-all;
}

/* Ecosystem Section */
.ecosystem-section {
    padding: var(--section-padding);
    background: var(--bg-primary);
}

.ecosystem-content {
    display: grid;
    grid-template-columns: 2fr 1fr;
    gap: 4rem;
    margin-top: 4rem;
    align-items: center;
}

.ecosystem-info h3 {
    font-size: 1.8rem;
    font-weight: 700;
    margin-bottom: 1.5rem;
}

.ecosystem-info p {
    color: var(--text-secondary);
    line-height: 1.7;
    margin-bottom: 2rem;
    font-size: 1.1rem;
}

.ecosystem-info a {
    color: var(--accent-cyan);
    text-decoration: none;
    border-bottom: 1px solid transparent;
    transition: var(--transition-smooth);
}

.ecosystem-info a:hover {
    border-bottom-color: var(--accent-cyan);
}

.ecosystem-benefits {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.benefit {
    display: flex;
    align-items: center;
    gap: 1rem;
    padding: 1rem;
    background: rgba(255, 255, 255, 0.05);
    border-radius: var(--border-radius);
    border-left: 3px solid var(--accent-purple);
}

.benefit-icon {
    font-size: 1.5rem;
}

.probe-attribution {
    text-align: center;
    background: linear-gradient(135deg, rgba(124, 58, 237, 0.1), rgba(6, 182, 212, 0.1));
    border: 1px solid var(--accent-purple);
    border-radius: var(--border-radius-lg);
    padding: 2rem;
}

.probe-logo {
    display: flex;
    flex-direction: column;
    align-items: center;
    margin-bottom: 1rem;
}

.probe-icon {
    max-width: 120px;
    max-height: 120px;
    height: auto;
    width: auto;
    object-fit: contain;
    margin-bottom: 1.5rem;
}

.probe-logo h4 {
    font-size: 1.5rem;
    font-weight: 700;
    background: linear-gradient(135deg, var(--accent-purple), var(--accent-cyan));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.probe-attribution p {
    color: var(--text-secondary);
    margin-bottom: 1.5rem;
    font-size: 0.95rem;
}

.probe-link {
    display: inline-flex;
    align-items: center;
    padding: 0.75rem 1.5rem;
    background: linear-gradient(135deg, var(--accent-purple), var(--accent-cyan));
    color: white;
    text-decoration: none;
    border-radius: var(--border-radius);
    font-weight: 600;
    transition: var(--transition-spring);
    box-shadow: 0 4px 16px rgba(124, 58, 237, 0.3);
}

.probe-link:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 24px rgba(124, 58, 237, 0.5);
}

/* Footer */
.footer {
    padding: 3rem 0;
    background: var(--bg-secondary);
    border-top: 1px solid var(--border-color);
}

.footer-content {
    display: grid;
    grid-template-columns: 1fr auto 1fr;
    gap: 2rem;
    align-items: center;
}

.footer-info h3 {
    font-size: 1.3rem;
    font-weight: 700;
    margin-bottom: 0.5rem;
    background: linear-gradient(135deg, var(--accent-purple), var(--accent-cyan));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

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

.footer-links {
    display: flex;
    gap: 2rem;
}

.footer-links a {
    color: var(--text-secondary);
    text-decoration: none;
    transition: var(--transition-smooth);
    font-size: 0.95rem;
}

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

.footer-credit {
    text-align: right;
}

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

.footer-credit a {
    color: var(--accent-purple);
    text-decoration: none;
    transition: var(--transition-smooth);
}

.footer-credit a:hover {
    color: var(--accent-cyan);
}

/* Responsive Design */
@media (max-width: 968px) {
    .problem-solution {
        grid-template-columns: 1fr;
        gap: 3rem;
    }
    
    .ecosystem-content {
        grid-template-columns: 1fr;
        gap: 3rem;
        text-align: center;
    }
    
    .footer-content {
        grid-template-columns: 1fr;
        text-align: center;
        gap: 1.5rem;
    }
    
    .footer-credit {
        text-align: center;
    }
}

@media (max-width: 768px) {
    :root {
        --section-padding: 80px 0;
    }
    
    .container {
        padding: 0 1rem;
    }
    
    .hero {
        padding: 80px 0;
    }
    
    .hero-cta {
        flex-direction: column;
        align-items: center;
    }
    
    .cta-button {
        width: 100%;
        max-width: 280px;
        justify-content: center;
    }
    
    .command-box pre {
        font-size: 0.85rem;
        padding-right: 0;
    }
    
    .copy-btn {
        position: static;
        margin-top: 1rem;
        width: 100%;
        justify-content: center;
    }
    
    .value-props {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 480px) {
    .brain-animation {
        width: 150px;
        height: 150px;
    }
    
    .brain-core {
        width: 60px;
        height: 60px;
    }
    
    .pulse-1 { width: 90px; height: 90px; }
    .pulse-2 { width: 120px; height: 120px; }
    .pulse-3 { width: 150px; height: 150px; }
    
    .alt-commands {
        grid-template-columns: 1fr;
    }
    
    .hero-install {
        margin: 2rem 0;
    }
    
    .problem-solution {
        gap: 2rem;
    }
}

/* Quick Start Section */
.quickstart-section {
    padding: 4rem 0 6rem;
    background: linear-gradient(180deg, var(--bg-primary) 0%, var(--bg-secondary) 100%);
}

.steps-container {
    max-width: 900px;
    margin: 0 auto;
    display: flex;
    flex-direction: column;
    gap: 4rem;
}

.step-card {
    background: rgba(255, 255, 255, 0.03);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius-lg);
    padding: 2.5rem;
    position: relative;
    transition: var(--transition-smooth);
    backdrop-filter: blur(10px);
    margin-bottom: 3rem;
}

.step-card:last-child {
    margin-bottom: 0;
}

/* Removed hover effect for step cards */

.step-header {
    display: flex;
    align-items: center;
    gap: 1.5rem;
    margin-bottom: 1.5rem;
}

.step-number {
    width: 3rem;
    height: 3rem;
    background: linear-gradient(135deg, var(--accent-purple), var(--accent-blue));
    color: white;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    font-size: 1.2rem;
    box-shadow: 0 4px 16px rgba(124, 58, 237, 0.3);
    min-width: 3rem;
}

.step-header h3 {
    font-size: 1.8rem;
    font-weight: 700;
    color: var(--text-primary);
    margin: 0;
    line-height: 1.2;
}

.step-description {
    color: var(--text-secondary);
    font-size: 1.1rem;
    line-height: 1.6;
    margin-bottom: 1.5rem;
}

.step-card .install-tabs {
    margin: 1.5rem 0;
}

.step-card .command-box {
    margin-top: 1.5rem;
    margin-bottom: 0;
}

.instruction-box {
    background: rgba(6, 182, 212, 0.1);
    border: 1px solid var(--accent-cyan);
    border-radius: var(--border-radius);
    padding: 1.25rem;
    margin-top: 1rem;
    text-align: left;
}

.instruction-box p {
    margin: 0 0 0.5rem 0;
    font-size: 1rem;
    color: var(--text-primary);
    line-height: 1.5;
}

.instruction-box p:last-child {
    margin-bottom: 0;
    font-style: italic;
    color: var(--text-secondary);
}

.instruction-box strong {
    color: var(--accent-cyan);
}

.optional-automation {
    margin-top: 2rem;
    padding: 1.5rem;
    background: rgba(124, 58, 237, 0.05);
    border: 1px dashed var(--accent-purple);
    border-radius: var(--border-radius);
}

.optional-automation h4 {
    margin: 0 0 1rem 0;
    font-size: 1.1rem;
    color: var(--accent-purple);
    font-weight: 600;
}

.optional-automation p {
    margin: 0 0 1rem 0;
    color: var(--text-secondary);
    font-size: 0.95rem;
    line-height: 1.5;
}

.optional-automation code {
    background: rgba(255, 255, 255, 0.1);
    padding: 0.2rem 0.4rem;
    border-radius: 4px;
    font-family: var(--font-mono);
    font-size: 0.9rem;
    color: var(--accent-cyan);
}

.pro-tip {
    background: linear-gradient(135deg, rgba(124, 58, 237, 0.1), rgba(6, 182, 212, 0.1));
    border: 1px solid var(--accent-purple);
    border-radius: var(--border-radius);
    padding: 1.25rem;
    margin-top: 1.5rem;
    color: var(--text-secondary);
    font-size: 1rem;
    line-height: 1.5;
}

.pro-tip a {
    color: var(--accent-cyan);
    text-decoration: none;
    font-weight: 500;
    border-bottom: 1px dotted var(--accent-cyan);
    transition: var(--transition-smooth);
}

.pro-tip a:hover {
    color: var(--accent-purple);
    border-bottom-color: var(--accent-purple);
}


/* Mode Selection Styles */
.mode-selection {
    text-align: center;
    margin-bottom: 3rem;
}

.mode-selection h2 {
    margin-bottom: 2rem;
    color: var(--text-primary);
    font-size: 2.5rem;
    font-weight: 700;
}

.mode-tabs {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 1.5rem;
    justify-content: center;
    margin-bottom: 3rem;
    max-width: 1200px;
    margin-left: auto;
    margin-right: auto;
}

.mode-btn {
    background: rgba(255, 255, 255, 0.03);
    border: 2px solid var(--border-color);
    border-radius: var(--border-radius-lg);
    padding: 1.5rem 2rem;
    cursor: pointer;
    transition: var(--transition-smooth);
    display: flex;
    align-items: center;
    gap: 1rem;
    min-width: 280px;
    text-align: left;
}

.mode-btn:hover {
    border-color: var(--accent-purple);
    background: rgba(124, 58, 237, 0.1);
    transform: translateY(-2px);
    box-shadow: 0 8px 32px rgba(124, 58, 237, 0.2);
}

.mode-btn.active {
    border: 2px solid var(--accent-purple);
    background: rgba(124, 58, 237, 0.15);
    box-shadow: 0 8px 32px rgba(124, 58, 237, 0.3);
    transform: translateY(-2px);
}

.mode-icon {
    font-size: 2rem;
    flex-shrink: 0;
}

.mode-info h3 {
    color: var(--text-primary);
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: 0.5rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    flex-wrap: wrap;
}

.mode-info p {
    color: var(--text-secondary);
    font-size: 0.9rem;
    line-height: 1.4;
}

/* Experimental Badge */
.experimental-badge {
    background: linear-gradient(135deg, var(--accent-pink), var(--accent-purple));
    color: var(--text-primary);
    padding: 2px 8px;
    border-radius: 6px;
    font-size: 0.7rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    display: inline-block;
}

/* macOS Badge */
.macos-badge {
    background: linear-gradient(135deg, var(--accent-cyan), var(--accent-blue));
    color: var(--text-primary);
    padding: 2px 6px;
    border-radius: 4px;
    font-size: 0.8rem;
    font-weight: 500;
    margin-left: 0.5rem;
}

/* Warning Note */
.warning-note {
    color: var(--accent-pink);
    font-weight: 500;
    margin-top: 0.5rem;
}


/* Usage Guide Styling */
.usage-guide {
    background: linear-gradient(135deg, rgba(124, 58, 237, 0.1) 0%, rgba(59, 130, 246, 0.05) 100%);
    border: 1px solid rgba(124, 58, 237, 0.3);
}

.usage-guide .step-header {
    align-items: center;
    gap: 1rem;
    margin-bottom: 1.5rem;
}

.mode-explanation {
    margin-bottom: 1.5rem;
    padding-bottom: 1.5rem;
    border-bottom: 1px solid rgba(124, 58, 237, 0.2);
}

.mode-explanation p {
    color: var(--text-secondary);
    line-height: 1.7;
    margin-bottom: 1rem;
    font-size: 0.95rem;
}

.mode-explanation p:last-child {
    margin-bottom: 0;
}

.mode-explanation strong {
    color: var(--text-primary);
    font-weight: 700;
    font-size: 1.05rem;
    display: inline-block;
    margin-right: 0.5rem;
}

.usage-icon {
    width: 3rem;
    height: 3rem;
    background: linear-gradient(135deg, var(--accent-purple), var(--accent-blue));
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    flex-shrink: 0;
    box-shadow: 0 4px 16px rgba(124, 58, 237, 0.3);
}

.usage-list {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}

.usage-item {
    display: flex;
    align-items: flex-start;
    gap: 0.75rem;
    color: var(--text-secondary);
    line-height: 1.5;
}

.usage-bullet {
    color: var(--accent-purple);
    font-weight: bold;
    flex-shrink: 0;
    margin-top: 0.1rem;
}

.usage-item span:last-child {
    color: var(--text-primary);
}

/* Mode Content Switching */
.mode-content {
    display: none;
}

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


/* Responsive adjustments for Quick Start */
@media (max-width: 768px) {
    .quickstart-section {
        padding: 3rem 0 4rem;
    }
    
    .mode-selection h2 {
        font-size: 2rem;
    }
    
    .mode-tabs {
        grid-template-columns: 1fr;
        gap: 1rem;
    }
    
    .mode-btn {
        min-width: 260px;
        padding: 1.25rem 1.5rem;
    }
    
    
    .steps-container {
        gap: 3rem;
    }
    
    .step-card {
        padding: 2rem;
        margin-bottom: 2rem;
    }
    
    .step-header {
        gap: 1rem;
    }
    
    .step-number {
        width: 2.5rem;
        height: 2.5rem;
        font-size: 1rem;
        min-width: 2.5rem;
    }
    
    .step-header h3 {
        font-size: 1.5rem;
    }
    
    .usage-guide {
        padding: 0.4rem 0.7rem;
        font-size: 0.85rem;
    }
    
    .flow-arrow {
        font-size: 1rem;
    }
    
    .flow-arrow.branch-out,
    .flow-arrow.branch-in {
        font-size: 1.25rem;
    }
}

@media (max-width: 480px) {
    .step-header {
        flex-direction: column;
        text-align: center;
        gap: 1rem;
    }
    
    .flow-step {
        font-size: 0.8rem;
        padding: 0.4rem 0.6rem;
    }
}

/* --- New UI helpers for copy improvements --- */
.kicker {
    display: inline-block;
    margin: 0 auto 1rem;
    padding: 0.35rem 0.75rem;
    border: 1px solid var(--border-color);
    border-radius: 999px;
    background: rgba(255, 255, 255, 0.06);
    color: var(--accent-cyan);
    font-weight: 700;
    font-size: 0.85rem;
    letter-spacing: 0.06em;
    text-transform: uppercase;
}

.model-info {
    display: flex;
    justify-content: center;
    margin: 0.75rem 0 1.75rem;
}

.model-text {
    color: var(--text-muted);
    font-size: 1rem;
    text-align: center;
    line-height: 1.5;
    opacity: 0.8;
}

.hero-links {
    display: flex;
    justify-content: center;
    margin: 2rem 0 0;
}

.github-link {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.75rem 1.5rem;
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 0.95rem;
    font-weight: 500;
    transition: var(--transition-smooth);
    backdrop-filter: blur(10px);
}

.github-link:hover {
    background: rgba(255, 255, 255, 0.1);
    border-color: var(--accent-purple);
    color: var(--text-primary);
    transform: translateY(-1px);
}

.github-icon {
    flex-shrink: 0;
}

.model-badges {
    display: flex;
    gap: 0.5rem;
    justify-content: center;
    flex-wrap: wrap;
    margin: 0.75rem 0 1.75rem;
}
.badge {
    font-family: var(--font-mono);
    font-size: 0.85rem;
    color: var(--text-secondary);
    background: rgba(255, 255, 255, 0.06);
    border: 1px solid var(--border-color);
    border-radius: 999px;
    padding: 0.35rem 0.7rem;
    white-space: nowrap;
}

.feature-callout {
    margin: 2rem 0 3rem;
    padding: 1.5rem;
    border: 1px solid var(--accent-purple);
    border-radius: var(--border-radius);
    background: linear-gradient(135deg, rgba(124, 58, 237, 0.06), rgba(6, 182, 212, 0.06));
}
.feature-callout h4 {
    margin-bottom: 0.75rem;
    font-size: 1.1rem;
    color: var(--text-primary);
}
.checklist {
    list-style: none;
    padding: 0;
    margin: 0 0 1rem;
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
    gap: 0.5rem 1rem;
}
.checklist li {
    position: relative;
    padding-left: 1.6rem;
    color: var(--text-secondary);
}
.checklist li::before {
    content: "✓";
    position: absolute;
    left: 0;
    top: 0;
    font-weight: 700;
    color: var(--accent-cyan);
}
.inline-command {
    background: var(--bg-primary);
    border: 1px dashed var(--border-color);
    border-radius: 8px;
    padding: 0.75rem 1rem;
    overflow-x: auto;
}
.inline-command code {
    font-family: var(--font-mono);
    color: var(--accent-cyan);
    font-size: 0.9rem;
}