/* AgentClaw Landing — Light Theme */

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

:root {
    --color-bg: #ffffff;
    --color-bg-alt: #f8fafc;
    --color-text: #1e293b;
    --color-text-muted: #64748b;
    --color-primary: #3b82f6;
    --color-primary-dark: #2563eb;
    --color-primary-light: #dbeafe;
    --color-border: #e2e8f0;
    --color-card: #ffffff;
    --font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    --container: 1100px;
    --container-narrow: 750px;
    --radius: 12px;
    --radius-sm: 8px;
    --shadow: 0 1px 3px rgba(0, 0, 0, 0.08), 0 1px 2px rgba(0, 0, 0, 0.06);
    --shadow-lg: 0 10px 25px rgba(0, 0, 0, 0.08), 0 4px 10px rgba(0, 0, 0, 0.04);
    --transition: 0.2s ease;
}

html {
    scroll-behavior: smooth;
    scroll-padding-top: 80px;
}

body {
    font-family: var(--font-family);
    font-size: 16px;
    line-height: 1.6;
    color: var(--color-text);
    background: var(--color-bg);
    -webkit-font-smoothing: antialiased;
}

.container {
    max-width: var(--container);
    margin: 0 auto;
    padding: 0 1.5rem;
}

.container-narrow {
    max-width: var(--container-narrow);
    margin: 0 auto;
    padding: 0 1.5rem;
}

/* ========== Header / Nav ========== */

.header {
    position: sticky;
    top: 0;
    z-index: 100;
    background: rgba(255, 255, 255, 0.92);
    backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--color-border);
}

.nav-inner {
    max-width: var(--container);
    margin: 0 auto;
    padding: 0 1.5rem;
    display: flex;
    align-items: center;
    height: 64px;
    gap: 2rem;
}

.logo {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--color-text);
    text-decoration: none;
    letter-spacing: -0.02em;
}

.logo-accent {
    color: var(--color-primary);
}

.nav-links {
    display: flex;
    gap: 1.5rem;
    margin-left: auto;
}

.nav-links a {
    color: var(--color-text-muted);
    text-decoration: none;
    font-size: 0.9rem;
    font-weight: 500;
    transition: color var(--transition);
}

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

.nav-toggle {
    display: none;
    flex-direction: column;
    gap: 4px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 8px;
    margin-left: auto;
}

.nav-toggle span {
    display: block;
    width: 20px;
    height: 2px;
    background: var(--color-text);
    border-radius: 1px;
    transition: var(--transition);
}

/* ========== Buttons ========== */

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 0.625rem 1.5rem;
    border-radius: var(--radius-sm);
    font-size: 0.9rem;
    font-weight: 600;
    text-decoration: none;
    cursor: pointer;
    border: none;
    transition: all var(--transition);
    white-space: nowrap;
    background: var(--color-primary);
    color: #fff;
}

.btn:hover {
    background: var(--color-primary-dark);
    transform: translateY(-1px);
    box-shadow: 0 4px 12px rgba(59, 130, 246, 0.3);
}

.btn-sm {
    padding: 0.5rem 1rem;
    font-size: 0.85rem;
}

.btn-lg {
    padding: 0.875rem 2rem;
    font-size: 1.05rem;
    border-radius: var(--radius);
}

.btn-outline {
    background: transparent;
    color: var(--color-primary);
    border: 2px solid var(--color-primary);
}

.btn-outline:hover {
    background: var(--color-primary);
    color: #fff;
    box-shadow: 0 4px 12px rgba(59, 130, 246, 0.3);
}

.btn-primary {
    background: var(--color-primary);
    color: #fff;
}

.cta-note {
    display: inline-flex;
    align-items: center;
    gap: 0.35rem;
    margin-top: 0.75rem;
    font-size: 0.8rem;
    color: var(--color-text-muted);
}

.cta-note svg {
    opacity: 0.6;
}

/* ========== Sections ========== */

.section {
    padding: 5rem 0;
}

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

.section-title {
    font-size: 2rem;
    font-weight: 700;
    text-align: center;
    margin-bottom: 0.75rem;
    letter-spacing: -0.02em;
}

.section-subtitle {
    text-align: center;
    color: var(--color-text-muted);
    font-size: 1.1rem;
    margin-bottom: 3rem;
}

/* ========== Hero ========== */

.hero {
    padding: 6rem 0 5rem;
    text-align: center;
    background: linear-gradient(180deg, var(--color-bg) 0%, var(--color-bg-alt) 100%);
}

.hero-content {
    max-width: 680px;
    margin: 0 auto;
}

.hero-title {
    font-size: 3rem;
    font-weight: 800;
    line-height: 1.15;
    letter-spacing: -0.03em;
    margin-bottom: 1.25rem;
    background: linear-gradient(135deg, var(--color-text) 0%, var(--color-primary) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-subtitle {
    font-size: 1.2rem;
    color: var(--color-text-muted);
    line-height: 1.7;
    margin-bottom: 2rem;
}

.hero-cta {
    display: flex;
    flex-direction: column;
    align-items: center;
}

/* ========== How It Works ========== */

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

.step {
    text-align: center;
    position: relative;
}

.step-num {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background: var(--color-primary);
    color: #fff;
    font-weight: 700;
    font-size: 1rem;
    margin-bottom: 1rem;
}

.step-icon {
    font-size: 2.5rem;
    margin-bottom: 0.75rem;
    display: flex;
    justify-content: center;
}

.step-icon svg {
    width: 40px;
    height: 40px;
    stroke: var(--color-primary);
}

.step h3 {
    font-size: 1.15rem;
    font-weight: 600;
    margin-bottom: 0.5rem;
}

.step p {
    color: var(--color-text-muted);
    font-size: 0.95rem;
    line-height: 1.6;
}

/* ========== Features ========== */

.features-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 1.5rem;
    margin-top: 3rem;
}

.feature-card {
    background: var(--color-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    padding: 2rem;
    transition: all var(--transition);
}

.feature-card:hover {
    box-shadow: var(--shadow-lg);
    transform: translateY(-2px);
}

.card-header {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    margin-bottom: 0.5rem;
}

.feature-icon {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    border-radius: 10px;
    background: var(--color-primary-light);
    flex-shrink: 0;
}

.feature-icon svg {
    width: 20px;
    height: 20px;
    stroke: var(--color-primary);
}

.feature-card h3 {
    font-size: 1.05rem;
    font-weight: 600;
}

.feature-card p {
    color: var(--color-text-muted);
    font-size: 0.9rem;
    line-height: 1.6;
}

/* ========== Use Cases ========== */

.usecases-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 1.5rem;
    margin-top: 3rem;
}

.usecase-card {
    background: var(--color-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    padding: 2rem;
    transition: all var(--transition);
}

.usecase-card:hover {
    box-shadow: var(--shadow-lg);
    transform: translateY(-2px);
}

.usecase-icon {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    border-radius: 10px;
    background: var(--color-primary-light);
    flex-shrink: 0;
}

.usecase-icon svg {
    width: 20px;
    height: 20px;
    stroke: var(--color-primary);
}

.usecase-card h3 {
    font-size: 1.05rem;
    font-weight: 600;
}

.usecase-card p {
    color: var(--color-text-muted);
    font-size: 0.9rem;
    line-height: 1.6;
}

/* ========== Pricing ========== */

.pricing-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 1.25rem;
    margin-top: 3rem;
    align-items: stretch;
}

.pricing-card {
    background: var(--color-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    padding: 2rem 1.5rem;
    text-align: center;
    position: relative;
    transition: all var(--transition);
    display: flex;
    flex-direction: column;
}

.pricing-card:hover {
    box-shadow: var(--shadow-lg);
}

.pricing-highlighted {
    border-color: var(--color-primary);
    box-shadow: 0 0 0 1px var(--color-primary), var(--shadow-lg);
    transform: scale(1.03);
}

.pricing-badge {
    position: absolute;
    top: -12px;
    left: 50%;
    transform: translateX(-50%);
    background: var(--color-primary);
    color: #fff;
    padding: 0.25rem 1rem;
    border-radius: 20px;
    font-size: 0.75rem;
    font-weight: 600;
    white-space: nowrap;
}

.pricing-name {
    font-size: 1.2rem;
    font-weight: 600;
    margin-bottom: 1rem;
}

.pricing-price {
    margin-bottom: 0.5rem;
}

.price-amount {
    font-size: 2rem;
    font-weight: 800;
    letter-spacing: -0.02em;
}

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

.pricing-tokens {
    font-size: 0.85rem;
    color: var(--color-primary);
    font-weight: 600;
    margin-bottom: 0.25rem;
}

.pricing-messages {
    font-size: 0.8rem;
    color: var(--color-text-muted);
    margin-bottom: 1.5rem;
}

.pricing-features {
    list-style: none;
    text-align: left;
    margin-bottom: 1.5rem;
    font-size: 0.85rem;
    flex-grow: 1;
}

.pricing-features li {
    padding: 0.3rem 0;
    color: var(--color-text-muted);
    position: relative;
    padding-left: 1.25rem;
}

.pricing-features li::before {
    content: "\2713";
    position: absolute;
    left: 0;
    color: var(--color-primary);
    font-weight: 700;
}

.pricing-card .btn {
    width: 100%;
}

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

.faq-list {
    margin-top: 2.5rem;
}

.faq-item {
    border: 1px solid var(--color-border);
    border-radius: var(--radius-sm);
    margin-bottom: 0.75rem;
    background: var(--color-card);
    overflow: hidden;
}

.faq-item summary {
    padding: 1.25rem 1.5rem;
    font-weight: 600;
    font-size: 0.95rem;
    cursor: pointer;
    list-style: none;
    display: flex;
    align-items: center;
    justify-content: space-between;
    transition: background var(--transition);
}

.faq-item summary:hover {
    background: var(--color-bg-alt);
}

.faq-item summary::-webkit-details-marker {
    display: none;
}

.faq-item summary::after {
    content: "+";
    font-size: 1.25rem;
    font-weight: 300;
    color: var(--color-text-muted);
    transition: transform var(--transition);
    flex-shrink: 0;
    margin-left: 1rem;
}

.faq-item[open] summary::after {
    transform: rotate(45deg);
}

.faq-item p {
    padding: 0 1.5rem 1.25rem;
    color: var(--color-text-muted);
    font-size: 0.9rem;
    line-height: 1.7;
}

/* ========== CTA Section ========== */

.cta-section {
    background: linear-gradient(135deg, #eff6ff 0%, #dbeafe 100%);
    padding: 4rem 0;
}

.cta-section h2 {
    font-size: 2rem;
    font-weight: 700;
    margin-bottom: 1rem;
    letter-spacing: -0.02em;
}

.cta-section p {
    color: var(--color-text-muted);
    max-width: 600px;
    margin: 0 auto 2rem;
    font-size: 1.05rem;
}

/* ========== Footer ========== */

.footer {
    padding: 3rem 0 2rem;
    border-top: 1px solid var(--color-border);
}

.footer-inner {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    margin-bottom: 2rem;
}

.footer-tagline {
    color: var(--color-text-muted);
    font-size: 0.85rem;
    margin-top: 0.5rem;
}

.footer-links {
    display: flex;
    gap: 1.5rem;
}

.footer-links a {
    color: var(--color-text-muted);
    text-decoration: none;
    font-size: 0.85rem;
    transition: color var(--transition);
}

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

.footer-bottom {
    border-top: 1px solid var(--color-border);
    padding-top: 1.5rem;
    text-align: center;
}

.footer-bottom p {
    color: var(--color-text-muted);
    font-size: 0.8rem;
}

/* ========== Responsive ========== */

@media (max-width: 1024px) {
    .pricing-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    .pricing-highlighted {
        transform: none;
    }
}

@media (max-width: 768px) {
    .hero-title {
        font-size: 2.25rem;
    }
    .hero-subtitle {
        font-size: 1.05rem;
    }
    .steps {
        grid-template-columns: 1fr;
        gap: 2rem;
    }
    .features-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    .usecases-grid {
        grid-template-columns: 1fr;
    }
    .footer-inner {
        flex-direction: column;
        gap: 1.5rem;
    }
    .footer-links {
        flex-direction: column;
        gap: 0.75rem;
    }
    .nav-links {
        display: none;
        position: absolute;
        top: 64px;
        left: 0;
        right: 0;
        background: rgba(255, 255, 255, 0.98);
        backdrop-filter: blur(12px);
        flex-direction: column;
        padding: 1rem 1.5rem;
        border-bottom: 1px solid var(--color-border);
        box-shadow: var(--shadow);
    }
    .nav-links.open {
        display: flex;
    }
    .nav-toggle {
        display: flex;
    }
    .nav-inner .btn-sm {
        display: none;
    }
}

@media (max-width: 640px) {
    .section {
        padding: 3.5rem 0;
    }
    .hero {
        padding: 4rem 0 3.5rem;
    }
    .hero-title {
        font-size: 1.85rem;
    }
    .section-title {
        font-size: 1.6rem;
    }
    .features-grid {
        grid-template-columns: 1fr;
    }
    .pricing-grid {
        grid-template-columns: 1fr;
    }
    .pricing-card {
        max-width: 360px;
        margin: 0 auto;
    }
    .price-amount {
        font-size: 1.75rem;
    }
}