:root {
    --color-bg: #0a0a0a;
    --color-surface: #141414;
    --color-surface-elevated: #1a1a1a;
    --color-border: #2a2a2a;
    --color-text-primary: #f5f5f5;
    --color-text-secondary: #a0a0a0;
    --color-text-tertiary: #707070;
    --color-accent: #00d4aa;
    --color-accent-dim: #00a085;
    --color-verified: #00d4aa;

    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 1.5rem;
    --spacing-lg: 2rem;
    --spacing-xl: 3rem;
    --spacing-2xl: 4rem;
    --spacing-3xl: 6rem;

    --radius-sm: 4px;
    --radius-md: 8px;
    --radius-lg: 12px;

    --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    --font-mono: "SF Mono", Monaco, "Cascadia Code", "Roboto Mono", Consolas, "Courier New", monospace;
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-sans);
    background: var(--color-bg);
    color: var(--color-text-primary);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

.nav {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 100;
    background: rgba(10, 10, 10, 0.8);
    backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--color-border);
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: var(--spacing-md) var(--spacing-lg);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    font-size: 1.125rem;
    font-weight: 600;
    letter-spacing: -0.02em;
}

.nav-cta {
    color: var(--color-text-primary);
    text-decoration: none;
    font-size: 0.9375rem;
    padding: 0.5rem 1rem;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-sm);
    transition: all 0.2s ease;
}

.nav-cta:hover {
    border-color: var(--color-accent);
    background: rgba(0, 212, 170, 0.05);
}

main {
    padding-top: 4rem;
}

.hero {
    min-height: 90vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: var(--spacing-3xl) var(--spacing-lg);
    position: relative;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: radial-gradient(circle at 50% 50%, rgba(0, 212, 170, 0.08) 0%, transparent 50%);
    animation: pulse 8s ease-in-out infinite;
}

@keyframes pulse {
    0%, 100% { opacity: 0.3; transform: scale(1); }
    50% { opacity: 0.5; transform: scale(1.05); }
}

.hero-content {
    max-width: 1200px;
    width: 100%;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-3xl);
    align-items: center;
    position: relative;
    z-index: 1;
}

.hero-title {
    font-size: 3.5rem;
    font-weight: 700;
    line-height: 1.1;
    letter-spacing: -0.03em;
    margin-bottom: var(--spacing-md);
}

.hero-subtitle {
    font-size: 1.25rem;
    color: var(--color-text-secondary);
    line-height: 1.6;
    margin-bottom: var(--spacing-xl);
    max-width: 540px;
}

.cta-primary {
    display: inline-block;
    padding: 1rem 2rem;
    background: var(--color-accent);
    color: var(--color-bg);
    text-decoration: none;
    font-weight: 600;
    font-size: 1rem;
    border-radius: var(--radius-md);
    transition: all 0.2s ease;
}

.cta-primary:hover {
    background: var(--color-accent-dim);
    transform: translateY(-1px);
}

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

.identity-card {
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    padding: var(--spacing-lg);
    width: 100%;
    max-width: 420px;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.4);
    animation: float 6s ease-in-out infinite;
}

@keyframes float {
    0%, 100% { transform: translateY(0px); }
    50% { transform: translateY(-10px); }
}

.card-header {
    display: flex;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-lg);
    padding-bottom: var(--spacing-lg);
    border-bottom: 1px solid var(--color-border);
}

.agent-avatar {
    width: 48px;
    height: 48px;
    border-radius: var(--radius-md);
    background: linear-gradient(135deg, var(--color-accent) 0%, var(--color-accent-dim) 100%);
    flex-shrink: 0;
}

.agent-info {
    flex: 1;
}

.agent-name {
    font-size: 1.125rem;
    font-weight: 600;
    font-family: var(--font-mono);
    margin-bottom: 0.25rem;
}

.agent-type {
    font-size: 0.875rem;
    color: var(--color-text-secondary);
}

.card-body {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
}

.field {
    display: flex;
    flex-direction: column;
    gap: 0.25rem;
}

.field-label {
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--color-text-tertiary);
    font-weight: 600;
}

.field-value {
    font-size: 0.9375rem;
    color: var(--color-text-secondary);
    font-family: var(--font-mono);
}

.field-value.verified {
    color: var(--color-verified);
}

.section-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: var(--spacing-3xl) var(--spacing-lg);
}

section h2 {
    font-size: 2.5rem;
    font-weight: 700;
    letter-spacing: -0.02em;
    margin-bottom: var(--spacing-md);
    text-align: center;
}

.section-intro {
    font-size: 1.125rem;
    color: var(--color-text-secondary);
    text-align: center;
    max-width: 600px;
    margin: 0 auto var(--spacing-2xl);
}

.problem {
    background: var(--color-surface);
    border-top: 1px solid var(--color-border);
    border-bottom: 1px solid var(--color-border);
}

.problem-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--spacing-xl);
}

.problem-item {
    padding: var(--spacing-lg);
    background: var(--color-bg);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
}

.problem-icon {
    font-size: 2rem;
    margin-bottom: var(--spacing-md);
    opacity: 0.6;
}

.problem-item h3 {
    font-size: 1.25rem;
    margin-bottom: var(--spacing-sm);
}

.problem-item p {
    color: var(--color-text-secondary);
    font-size: 0.9375rem;
}

.solution-steps {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-xl);
    max-width: 800px;
    margin: 0 auto;
}

.step {
    display: flex;
    gap: var(--spacing-lg);
    align-items: flex-start;
}

.step-number {
    width: 48px;
    height: 48px;
    border-radius: 50%;
    background: var(--color-surface-elevated);
    border: 1px solid var(--color-border);
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    font-size: 1.125rem;
    flex-shrink: 0;
}

.step-content h3 {
    font-size: 1.25rem;
    margin-bottom: var(--spacing-xs);
}

.step-content p {
    color: var(--color-text-secondary);
    font-size: 0.9375rem;
}

.use-cases {
    background: var(--color-surface);
    border-top: 1px solid var(--color-border);
    border-bottom: 1px solid var(--color-border);
}

.use-case-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: var(--spacing-lg);
}

.use-case {
    padding: var(--spacing-lg);
    background: var(--color-bg);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    transition: all 0.2s ease;
}

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

.use-case h3 {
    font-size: 1.125rem;
    margin-bottom: var(--spacing-sm);
}

.use-case p {
    color: var(--color-text-secondary);
    font-size: 0.9375rem;
}

.features {
    background: var(--color-bg);
}

.feature-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: var(--spacing-xl);
}

.feature {
    padding: var(--spacing-lg);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
}

.feature h3 {
    font-size: 1.125rem;
    margin-bottom: var(--spacing-sm);
}

.feature p {
    color: var(--color-text-secondary);
    font-size: 0.9375rem;
}

.cta-section {
    background: var(--color-surface);
    border-top: 1px solid var(--color-border);
    text-align: center;
}

.cta-section h2 {
    margin-bottom: var(--spacing-lg);
}

.cta-section p {
    font-size: 1.125rem;
    color: var(--color-text-secondary);
    margin-bottom: var(--spacing-xl);
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
}

.form-container {
    max-width: 480px;
    margin: 0 auto;
}

.form-group {
    margin-bottom: var(--spacing-md);
    text-align: left;
}

.form-group label {
    display: block;
    font-size: 0.875rem;
    font-weight: 600;
    margin-bottom: var(--spacing-xs);
    color: var(--color-text-secondary);
}

.form-group input,
.form-group textarea {
    width: 100%;
    padding: 0.75rem 1rem;
    background: var(--color-bg);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-sm);
    color: var(--color-text-primary);
    font-family: var(--font-sans);
    font-size: 1rem;
    transition: all 0.2s ease;
}

.form-group input:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--color-accent);
    background: var(--color-surface);
}

.form-group textarea {
    resize: vertical;
    min-height: 100px;
}

.form-submit {
    width: 100%;
    padding: 1rem 2rem;
    background: var(--color-accent);
    color: var(--color-bg);
    border: none;
    font-weight: 600;
    font-size: 1rem;
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: all 0.2s ease;
}

.form-submit:hover {
    background: var(--color-accent-dim);
}

.form-submit:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

.form-message {
    margin-top: var(--spacing-md);
    padding: var(--spacing-md);
    border-radius: var(--radius-sm);
    font-size: 0.9375rem;
    text-align: center;
}

.form-message.success {
    background: rgba(0, 212, 170, 0.1);
    border: 1px solid var(--color-accent);
    color: var(--color-accent);
}

.form-message.error {
    background: rgba(255, 80, 80, 0.1);
    border: 1px solid #ff5050;
    color: #ff5050;
}

footer {
    border-top: 1px solid var(--color-border);
    padding: var(--spacing-xl) var(--spacing-lg);
    text-align: center;
    color: var(--color-text-tertiary);
    font-size: 0.875rem;
}

@media (max-width: 968px) {
    .hero-content {
        grid-template-columns: 1fr;
        gap: var(--spacing-2xl);
    }

    .hero-title {
        font-size: 2.5rem;
    }

    .hero-subtitle {
        font-size: 1.125rem;
    }

    section h2 {
        font-size: 2rem;
    }

    .problem-grid,
    .use-case-grid,
    .feature-grid {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 640px) {
    .hero {
        min-height: auto;
        padding: var(--spacing-2xl) var(--spacing-md);
    }

    .hero-title {
        font-size: 2rem;
    }

    .hero-subtitle {
        font-size: 1rem;
    }

    .section-container {
        padding: var(--spacing-2xl) var(--spacing-md);
    }

    section h2 {
        font-size: 1.75rem;
    }

    .nav-container {
        padding: var(--spacing-md);
    }
}