:root {
    /* Color Palette - Crystal Clarity Light Theme */
    --bg-primary: #F8FAFC;
    --bg-secondary: #FFFFFF;
    --text-primary: #0F172A;
    --text-secondary: #475569;
    --accent-teal: #009688;
    --accent-blue: #3B82F6;
    --accent-gradient: linear-gradient(135deg, var(--accent-teal) 0%, var(--accent-blue) 100%);
    --border-color: rgba(226, 232, 240, 0.8);
    --card-bg: rgba(255, 255, 255, 0.7);
    --nav-bg: rgba(248, 250, 252, 0.8);

    /* Typography */
    --font-heading: 'Outfit', system-ui, -apple-system, sans-serif;
    --font-body: 'Inter', system-ui, -apple-system, sans-serif;

    /* UI Scale */
    --container-width: 1200px;
    --btn-radius: 12px;
    --card-radius: 20px;
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    --logo-size: 30px;
}

* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html {
    scroll-behavior: smooth;
}

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

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

/* Typography Helpers */
h1,
h2,
h3,
h4 {
    font-family: var(--font-heading);
    font-weight: 700;
    line-height: 1.2;
}

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

.text-center {
    text-align: center;
}

/* Navbar */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 80px;
    background: var(--nav-bg);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--border-color);
    z-index: 1000;
    display: flex;
    align-items: center;
}

.nav-inner {
    display: flex;
    justify-content: space-between;
    align-items: center;
    width: 100%;
}

.logo {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    text-decoration: none;
    color: var(--text-primary);
    font-size: 1.4rem;
    font-weight: 800;
    font-family: var(--font-heading);
    letter-spacing: -0.02em;
}

.logo-icon {
    width: var(--logo-size);
    height: var(--logo-size);
    object-fit: contain;
}

.nav-links {
    display: flex;
    list-style: none;
    gap: 2.5rem;
}

.nav-links a {
    text-decoration: none;
    color: var(--text-secondary);
    font-weight: 500;
    font-size: 0.95rem;
    transition: var(--transition);
}

.nav-links a:hover {
    color: var(--accent-teal);
}

.nav-actions {
    display: flex;
    align-items: center;
    gap: 1rem;
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 0.75rem 1.5rem;
    border-radius: var(--btn-radius);
    font-weight: 600;
    font-size: 0.95rem;
    cursor: pointer;
    transition: var(--transition);
    text-decoration: none;
    border: none;
}

.btn-primary {
    background: var(--accent-teal);
    color: #FFFFFF;
    box-shadow: 0 4px 12px rgba(0, 150, 136, 0.2);
}

.btn-primary:hover {
    background: #00796B;
    transform: translateY(-2px);
    box-shadow: 0 6px 16px rgba(0, 150, 136, 0.3);
}

.btn-secondary {
    background: var(--bg-secondary);
    color: var(--text-primary);
    border: 1px solid var(--border-color);
}

.btn-secondary:hover {
    background: var(--bg-primary);
    border-color: var(--text-secondary);
}

.btn-outline {
    background: transparent;
    color: var(--text-primary);
    border: 1.5px solid var(--text-primary);
}

.btn-outline:hover {
    background: var(--text-primary);
    color: var(--bg-primary);
}

/* Hero Section */
.hero {
    padding: 180px 0 100px;
    position: relative;
}

.hero-glow {
    position: absolute;
    top: -200px;
    left: 50%;
    transform: translateX(-50%);
    width: 1000px;
    height: 600px;
    background: radial-gradient(circle, rgba(0, 150, 136, 0.08) 0%, transparent 70%);
    z-index: -1;
    pointer-events: none;
}

.hero-inner {
    display: grid;
    grid-template-columns: 1.2fr 0.8fr;
    gap: 4rem;
    align-items: center;
}

.hero-title {
    font-size: 4.5rem;
    letter-spacing: -0.04em;
    margin-bottom: 2rem;
}

.hero-subtitle {
    font-size: 1.25rem;
    color: var(--text-secondary);
    max-width: 600px;
    margin-bottom: 3rem;
}

.hero-btns {
    display: flex;
    gap: 1.25rem;
}

.hero-visual {
    position: relative;
    border-radius: var(--card-radius);
    overflow: hidden;
    box-shadow: 0 30px 60px rgba(15, 23, 42, 0.1);
    border: 1px solid var(--border-color);
    background: #FFFFFF;
}

.hero-img {
    width: 100%;
    display: block;
    transition: var(--transition);
}

/* Value Prop */
.value-prop {
    padding: 100px 0;
    background: var(--bg-secondary);
}

.section-head {
    margin-bottom: 5rem;
}

.section-title {
    font-size: 3rem;
    margin-bottom: 1.5rem;
}

.section-subtitle {
    color: var(--text-secondary);
    font-size: 1.15rem;
}

/* Features */
.features {
    padding: 100px 0;
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 2rem;
}

.feature-card {
    background: var(--card-bg);
    padding: 3rem;
    border-radius: var(--card-radius);
    border: 1px solid var(--border-color);
    transition: var(--transition);
    position: relative;
    overflow: hidden;
}

.feature-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 4px;
    height: 0;
    background: var(--accent-gradient);
    transition: var(--transition);
}

.feature-card:hover {
    transform: translateY(-8px);
    background: var(--bg-secondary);
    box-shadow: 0 20px 40px rgba(15, 23, 42, 0.05);
    border-color: var(--accent-teal);
}

.feature-card:hover::before {
    height: 100%;
}

.feature-card h3 {
    font-size: 1.5rem;
    margin-bottom: 1.25rem;
}

.feature-card p {
    color: var(--text-secondary);
    font-size: 1.05rem;
}

/* Shared: Agent Concept Card */
.what-is-agent {
    position: relative;
    z-index: 10;
    margin-bottom: 80px;
}

.agent-concept-card {
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--card-radius);
    padding: 3rem;
    display: flex;
    align-items: center;
    gap: 3rem;
    box-shadow: 0 20px 40px rgba(15, 23, 42, 0.05);
    position: relative;
    overflow: hidden;
    transition: var(--transition);
}

.agent-concept-card:hover {
    transform: translateY(-5px);
    border-color: var(--accent-teal);
    box-shadow: 0 30px 60px rgba(0, 150, 136, 0.08);
}

.agent-concept-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 4px;
    height: 100%;
    background: var(--accent-gradient);
    opacity: 0;
    transition: var(--transition);
}

.agent-concept-card:hover::before {
    opacity: 1;
}

.concept-icon {
    flex-shrink: 0;
    width: 140px;
    height: 140px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.concept-icon img {
    width: 100%;
    height: 100%;
    object-fit: contain;
    border-radius: 50%;
    filter: drop-shadow(0 10px 15px rgba(0, 0, 0, 0.1));
}

.concept-text h2 {
    font-size: 2.2rem;
    margin-bottom: 1rem;
    color: var(--text-primary);
}

.concept-text p {
    font-size: 1.15rem;
    color: var(--text-secondary);
    line-height: 1.7;
}

@media (max-width: 768px) {
    .agent-concept-card {
        flex-direction: column;
        text-align: center;
        padding: 2rem;
    }
}

/* Architecture Teaser */
.arch-teaser {
    padding: 100px 0;
    background: var(--bg-primary);
}

.arch-teaser-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    align-items: center;
}

.arch-teaser-text h2 {
    font-size: 2.5rem;
    margin-bottom: 1rem;
}

.arch-teaser-text p {
    font-size: 1.1rem;
    color: var(--text-secondary);
    margin-bottom: 2rem;
}

.arch-teaser-visual {
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--card-radius);
    padding: 2rem;
    text-align: center;
    box-shadow: 0 20px 40px rgba(15, 23, 42, 0.05);
}

.mini-arch-diagram {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem;
}

.mini-node {
    font-size: 2rem;
    background: var(--bg-primary);
    width: 70px;
    height: 70px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 16px;
    border: 1px solid var(--border-color);
}

.mini-line {
    flex-grow: 1;
    height: 2px;
    background: var(--border-color);
    margin: 0 1rem;
    position: relative;
}

.mini-line::after {
    content: '';
    position: absolute;
    top: -2px;
    left: 0;
    width: 6px;
    height: 6px;
    background: var(--accent-teal);
    border-radius: 50%;
    animation: slideRight 2s linear infinite;
}

@keyframes slideRight {
    0% { left: 0; opacity: 0; }
    20% { opacity: 1; }
    80% { opacity: 1; }
    100% { left: 100%; opacity: 0; }
}

@media (max-width: 768px) {
    .arch-teaser-grid { grid-template-columns: 1fr; }
}

/* Workflows */
.workflow {
    padding: 100px 0;
    background: var(--bg-secondary);
}

.tabs {
    display: flex;
    justify-content: center;
    flex-wrap: wrap;
    gap: 1.25rem;
    margin-bottom: 4rem;
}

.tab-btn {
    background: var(--bg-primary);
    border: 1px solid var(--border-color);
    color: var(--text-secondary);
    padding: 0.8rem 2rem;
    border-radius: 40px;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
}

.tab-btn.active {
    background: var(--accent-teal);
    color: white;
    border-color: var(--accent-teal);
    box-shadow: 0 10px 20px rgba(0, 150, 136, 0.2);
}

.workflow-grid {
    display: grid;
    grid-template-columns: 1fr 1.2fr;
    gap: 4rem;
    align-items: center;
}

.workflow-text h3 {
    font-family: 'Outfit', sans-serif;
    font-size: 2.2rem;
    margin-bottom: 1.5rem;
    color: var(--text-primary);
    /* Assuming --text-dark maps to --text-primary */
}

.workflow-text p {
    font-size: 1.1rem;
    line-height: 1.8;
    color: var(--text-secondary);
    /* Assuming --text-muted maps to --text-secondary */
}

.workflow-image {
    position: relative;
    border-radius: 24px;
    overflow: hidden;
    box-shadow: 0 20px 40px rgba(15, 23, 42, 0.1);
    /* Assuming --shadow-xl */
    background: white;
    padding: 1rem;
    transition: transform 0.5s ease;
}

.workflow-image:hover {
    transform: translateY(-10px);
}

.workflow-image img {
    width: 100%;
    height: auto;
    border-radius: 16px;
    display: block;
}

.tab-content {
    display: none;
    background: white;
    padding: 4rem;
    border-radius: 32px;
    box-shadow: 0 10px 30px rgba(15, 23, 42, 0.05);
    /* Assuming --shadow-lg */
    max-width: 900px;
    margin: 0 auto;
}

/* Tab active overrides reveal and display */
.tab-content.tab-content-active {
    display: block !important;
    opacity: 1 !important;
    transform: translateY(0) !important;
    animation: fadeIn 0.6s ease-out;
}

.workflow-card {
    background: var(--bg-primary);
    padding: 4rem;
    border-radius: 30px;
    border: 1px solid var(--border-color);
    text-align: center;
    box-shadow: 0 10px 30px rgba(15, 23, 42, 0.03);
}

.workflow-card p {
    font-size: 1.4rem;
    font-weight: 500;
    color: var(--text-primary);
    line-height: 1.5;
}

/* How it Works */
.how-it-works {
    padding: 120px 0;
    background: #FFFFFF;
}

.process-steps {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 2rem;
    margin-top: 5rem;
    position: relative;
}

/* Connector line for desktop */
.process-steps::after {
    content: '';
    position: absolute;
    top: 30px;
    left: 10%;
    right: 10%;
    height: 2px;
    background: var(--border-color);
    z-index: 0;
}

.process-step {
    text-align: center;
    position: relative;
    z-index: 1;
}

.step-num {
    width: 60px;
    height: 60px;
    background: #FFFFFF;
    border: 3px solid var(--accent-teal);
    color: var(--accent-teal);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    font-weight: 800;
    margin: 0 auto 1.5rem;
    transition: var(--transition);
    box-shadow: 0 0 0 8px #FFFFFF;
}

.process-step:hover .step-num {
    background: var(--accent-teal);
    color: white;
    transform: scale(1.1);
}

.process-step h4 {
    font-size: 1.25rem;
    margin-bottom: 0.75rem;
}

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

/* Pricing Section */
.pricing {
    padding: 120px 0;
    background: var(--bg-primary);
}

.pricing-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 2.5rem;
    margin-top: 5rem;
    align-items: stretch;
}

.pricing-card {
    background: var(--bg-secondary);
    padding: 4rem 2.5rem;
    border-radius: var(--card-radius);
    border: 1px solid var(--border-color);
    transition: var(--transition);
    display: flex;
    flex-direction: column;
    position: relative;
    overflow: hidden;
}

.pricing-card:hover {
    transform: translateY(-8px);
    box-shadow: 0 15px 30px rgba(15, 23, 42, 0.05);
}

.pricing-card.featured {
    border-color: var(--accent-teal);
    box-shadow: 0 20px 50px rgba(0, 150, 136, 0.1);
    background: #FFFFFF;
    transform: scale(1.05);
    z-index: 2;
}

.pricing-card.featured:hover {
    transform: scale(1.05) translateY(-8px);
}

.plan-badge {
    position: absolute;
    top: 1.5rem;
    right: 1.5rem;
    background: var(--accent-gradient);
    color: white;
    padding: 0.25rem 1rem;
    border-radius: 30px;
    font-size: 0.85rem;
    font-weight: 700;
    letter-spacing: 0.05em;
}

.plan-info {
    margin-bottom: 2rem;
}

.plan-name {
    font-size: 1.75rem;
    margin-bottom: 0.5rem;
    letter-spacing: -0.02em;
}

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

.plan-price {
    margin-bottom: 3rem;
    display: flex;
    align-items: baseline;
    font-family: var(--font-heading);
}

.plan-price .currency {
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--text-primary);
}

.plan-price .amount {
    font-size: 4rem;
    font-weight: 800;
    margin: 0 0.25rem;
    color: var(--text-primary);
}

.plan-price .period {
    color: var(--text-secondary);
    font-size: 1.1rem;
    font-weight: 500;
}

.plan-features {
    list-style: none;
    margin-bottom: 3.5rem;
    flex-grow: 1;
}

.plan-features li {
    padding: 0.85rem 0;
    border-bottom: 1px solid var(--border-color);
    color: var(--text-secondary);
    font-size: 1rem;
    display: flex;
    align-items: flex-start;
}

.plan-features li::before {
    content: "✓";
    margin-right: 1rem;
    color: var(--accent-teal);
    font-weight: 800;
    flex-shrink: 0;
}

.plan-features li.highlight {
    color: var(--text-primary);
    font-weight: 600;
    background: linear-gradient(90deg, rgba(0, 150, 136, 0.05), transparent);
    border-radius: 4px;
    padding-left: 0.5rem;
    margin-left: -0.5rem;
}

.full-width {
    width: 100%;
}

/* Privacy & Trust */
.trust-section {
    padding: 120px 0;
    background: var(--bg-primary);
}

.trust-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 2.5rem;
    margin-top: 4rem;
}

.trust-card {
    background: var(--bg-secondary);
    padding: 3.5rem;
    border-radius: var(--card-radius);
    border: 1px solid var(--border-color);
    transition: var(--transition);
}

.trust-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 15px 35px rgba(15, 23, 42, 0.04);
}

.trust-card h3 {
    margin-bottom: 1rem;
    color: var(--accent-teal);
}

.trust-card p {
    color: var(--text-secondary);
    font-size: 1.05rem;
}

/* Bottom CTA Banner */
.bottom-cta {
    padding: 100px 0;
    background: var(--accent-gradient);
    color: white;
    text-align: center;
}

.bottom-cta h2 {
    font-size: 3rem;
    margin-bottom: 1rem;
    color: white;
}

.bottom-cta p {
    font-size: 1.25rem;
    margin-bottom: 3rem;
    opacity: 0.9;
}

.bottom-cta .btn-secondary {
    padding: 1rem 2.5rem;
    font-size: 1.1rem;
    box-shadow: 0 10px 20px rgba(0, 0, 0, 0.1);
}

/* Footer (Re-positioned) */
.footer {
    padding: 100px 0 40px;
    border-top: 1px solid var(--border-color);
    background: #FFFFFF;
}

.footer-inner {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr;
    gap: 4rem;
}

.footer-brand p {
    margin-top: 1.5rem;
    color: var(--text-secondary);
    max-width: 400px;
}

.footer-links h4 {
    margin-bottom: 1.5rem;
    font-size: 1.1rem;
}

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

.footer-links li {
    margin-bottom: 0.75rem;
}

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

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

.footer-bottom {
    margin-top: 5rem;
    padding-top: 2rem;
    border-top: 1px solid var(--border-color);
    text-align: center;
    color: var(--text-secondary);
    font-size: 0.9rem;
}

/* Download Page */
.download-page {
    padding-top: 80px;
    padding-bottom: 100px;
}

.download-header {
    position: relative;
    padding: 40px 0 10px;
}

.download-header .section-head {
    margin-bottom: 2rem;
}

.download-header .section-title {
    font-size: 2.5rem;
}

.download-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 2.5rem;
    margin-top: 3rem;
}

.download-card {
    background: var(--bg-secondary);
    padding: 3rem;
    border-radius: var(--card-radius);
    border: 1px solid var(--border-color);
    transition: var(--transition);
    display: flex;
    flex-direction: column;
    position: relative;
    overflow: hidden;
}

.download-card:hover {
    transform: translateY(-8px);
    box-shadow: 0 20px 40px rgba(15, 23, 42, 0.05);
    border-color: var(--accent-teal);
}

.download-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 4px;
    height: 0;
    background: var(--accent-gradient);
    transition: var(--transition);
}

.download-card:hover::before {
    height: 100%;
}

.dl-card-icon {
    width: 60px;
    height: 60px;
    border-radius: 16px;
    background: var(--bg-primary);
    margin-bottom: 1.5rem;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 2rem;
    color: var(--accent-teal);
    border: 1px solid var(--border-color);
}

.mac-icon::after { content: '💻'; }
.android-icon::after { content: '📱'; }
.server-icon::after { content: '🖥️'; }
.web-icon::after { content: '🌐'; }

.download-card h3 {
    font-size: 1.75rem;
    margin-bottom: 1rem;
    color: var(--text-primary);
}

.download-card p {
    color: var(--text-secondary);
    font-size: 1.05rem;
    margin-bottom: 2.5rem;
    flex-grow: 1;
}

.dl-actions {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.code-box {
    background: #1E293B;
    border-radius: var(--btn-radius);
    padding: 0.5rem;
    display: flex;
    align-items: center;
    justify-content: space-between;
    overflow: hidden;
    border: 1px solid #334155;
    width: 100%;
}

.code-box code {
    color: #38BDF8;
    font-family: 'Courier New', Courier, monospace;
    font-size: 0.9rem;
    padding-left: 0.75rem;
    white-space: nowrap;
    overflow-x: auto;
}

.copy-btn {
    background: #334155;
    color: white;
    border: none;
    padding: 0.6rem 1rem;
    border-radius: 8px;
    cursor: pointer;
    font-size: 0.85rem;
    transition: var(--transition);
    white-space: nowrap;
    margin-left: 1rem;
}

.copy-btn:hover {
    background: #475569;
}

.mt-10 {
    margin-top: 10px;
}

.btn.disabled {
    opacity: 0.6;
    cursor: not-allowed;
    background: var(--bg-primary);
    color: var(--text-secondary);
    border-color: var(--border-color);
}

.btn.disabled:hover {
    background: var(--bg-primary);
    color: var(--text-secondary);
}

.badge {
    background: var(--accent-gradient);
    color: white;
    font-size: 0.75rem;
    padding: 0.2rem 0.5rem;
    border-radius: 4px;
    margin-left: 0.5rem;
    font-weight: 700;
}

/* Animations */
@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(20px);
    }

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.reveal {
    opacity: 0;
    transform: translateY(30px);
    transition: all 0.8s ease-out;
}

.reveal.active {
    opacity: 1;
    transform: translateY(0);
}

/* Mobile Responsive */
@media (max-width: 1024px) {
    .hero-title {
        font-size: 3.5rem;
    }

    .hero-inner {
        grid-template-columns: 1fr;
        text-align: center;
    }

    .hero-subtitle {
        margin-left: auto;
        margin-right: auto;
    }

    .hero-btns {
        justify-content: center;
    }

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

    .pricing-grid {
        grid-template-columns: 1fr 1fr;
        gap: 1.5rem;
    }

    .pricing-card.featured {
        transform: none;
    }

    .pricing-card.featured:hover {
        transform: translateY(-8px);
    }
}

@media (max-width: 768px) {
    .navbar {
        height: 70px;
    }

    .nav-links {
        display: none;
    }

    /* Hide on mobile for now, add burger later */
    .hero-title {
        font-size: 2.75rem;
    }

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

    .pricing-grid {
        grid-template-columns: 1fr;
        gap: 2rem;
    }

    .footer-inner {
        grid-template-columns: 1fr;
        gap: 2.5rem;
    }

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

    .section-title {
        font-size: 2.25rem;
    }

    .workflow-grid {
        grid-template-columns: 1fr;
        gap: 2rem;
    }

    .workflow-image {
        order: -1;
    }

    .tab-content {
        padding: 2rem;
    }
}