:root {
    --bg-color: #0a0a0a;
    --text-color: #ffffff;
    --accent-color: #ffffff;
    --secondary-text: rgba(255, 255, 255, 0.72);
    --border-color: rgba(255, 255, 255, 0.12);
    --hover-color: rgba(255, 255, 255, 0.9);
    --nav-bg: rgba(10, 10, 10, 0.94);
    --card-bg: rgba(255, 255, 255, 0.03);
}

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

html {
    scroll-behavior: smooth;
}

body {
    background: var(--bg-color);
    color: var(--text-color);
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "Roboto", "Oxygen", "Ubuntu", "Cantarell", sans-serif;
    line-height: 1.6;
    overflow-x: hidden;
}

a {
    color: inherit;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

.nav {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background-color: var(--nav-bg);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--border-color);
}

.nav-inner {
    min-height: 80px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 16px;
    position: relative;
}

.brand {
    text-decoration: none;
    font-size: 15px;
    letter-spacing: 1.6px;
    text-transform: uppercase;
    font-weight: 700;
}

.nav-links {
    display: flex;
    align-items: center;
    gap: 20px;
}

.nav-links a {
    color: var(--secondary-text);
    text-decoration: none;
    font-size: 12px;
    text-transform: uppercase;
    letter-spacing: 1px;
    white-space: nowrap;
    transition: color 0.25s ease;
}

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

.nav-toggle {
    display: none;
    flex-direction: column;
    background: transparent;
    border: none;
    cursor: pointer;
    padding: 8px;
    gap: 5px;
}

.nav-toggle span {
    width: 24px;
    height: 2px;
    background-color: var(--text-color);
    transition: all 0.25s ease;
    display: block;
}

.nav-toggle.active span:nth-child(1) {
    transform: rotate(45deg) translate(7px, 7px);
}

.nav-toggle.active span:nth-child(2) {
    opacity: 0;
}

.nav-toggle.active span:nth-child(3) {
    transform: rotate(-45deg) translate(7px, -7px);
}

.section {
    position: relative;
    padding: 96px 0;
}

.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    padding-top: 128px;
    overflow: hidden;
}

.bg-shape {
    position: absolute;
    z-index: -1;
    border-radius: 999px;
    filter: blur(64px);
    opacity: 0.3;
    pointer-events: none;
}

.bg-shape-1 {
    width: 520px;
    height: 520px;
    background: radial-gradient(circle at 30% 30%, rgba(255, 255, 255, 0.2), rgba(255, 255, 255, 0));
    top: -170px;
    right: -140px;
}

.bg-shape-2 {
    width: 420px;
    height: 420px;
    background: radial-gradient(circle at 50% 50%, rgba(255, 255, 255, 0.14), rgba(255, 255, 255, 0));
    bottom: -140px;
    left: -180px;
}

.eyebrow {
    margin-bottom: 16px;
    font-size: 11px;
    text-transform: uppercase;
    letter-spacing: 2px;
    color: var(--secondary-text);
}

.hero-title {
    font-size: clamp(42px, 7vw, 88px);
    font-weight: 300;
    letter-spacing: 4px;
    line-height: 1.08;
    text-transform: uppercase;
}

.hero-subtitle {
    margin-top: 24px;
    max-width: 880px;
    font-size: clamp(18px, 2.6vw, 30px);
    color: var(--secondary-text);
    line-height: 1.4;
    font-weight: 300;
}

.hero-proof {
    margin-top: 16px;
    max-width: 840px;
    font-size: 17px;
    color: var(--secondary-text);
}

.hero-actions {
    margin-top: 32px;
    display: flex;
    flex-wrap: wrap;
    gap: 12px;
}

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-height: 46px;
    padding: 0 20px;
    border-radius: 999px;
    border: 1px solid var(--text-color);
    background: var(--text-color);
    color: var(--bg-color);
    text-decoration: none;
    text-transform: uppercase;
    letter-spacing: 1px;
    font-size: 12px;
    font-weight: 600;
    transition: all 0.25s ease;
}

.btn:hover {
    background: var(--hover-color);
    border-color: var(--hover-color);
}

.btn-small {
    min-height: 38px;
    padding: 0 14px;
}

.btn-ghost {
    background: transparent;
    color: var(--text-color);
    border-color: var(--border-color);
}

.btn-ghost:hover {
    border-color: var(--text-color);
    background: transparent;
}

.hero-metrics {
    margin-top: 36px;
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 14px;
}

.metric {
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: 16px;
    padding: 18px;
}

.metric-value {
    font-size: 16px;
    text-transform: uppercase;
    letter-spacing: 0.8px;
}

.metric-label {
    margin-top: 8px;
    color: var(--secondary-text);
    font-size: 14px;
}

.section-head {
    display: flex;
    align-items: baseline;
    gap: 16px;
    margin-bottom: 32px;
}

.section-kicker {
    font-size: 14px;
    color: var(--secondary-text);
    text-transform: uppercase;
    letter-spacing: 1px;
}

.section-head h2 {
    font-size: clamp(30px, 5vw, 58px);
    font-weight: 300;
    text-transform: uppercase;
    letter-spacing: 3px;
    line-height: 1.08;
}

.section-contrast {
    background: linear-gradient(180deg, rgba(255, 255, 255, 0.02), rgba(255, 255, 255, 0));
    border-top: 1px solid var(--border-color);
    border-bottom: 1px solid var(--border-color);
}

.card-grid {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 14px;
}

.card,
.step,
.faq-item,
.pricing-model {
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: 16px;
}

.card {
    padding: 24px;
}

.card h3 {
    font-size: 19px;
    font-weight: 300;
    text-transform: uppercase;
    letter-spacing: 1px;
    line-height: 1.3;
}

.card p {
    margin-top: 12px;
    color: var(--secondary-text);
}

.card-accent {
    color: var(--text-color) !important;
}

.compare {
    border: 1px solid var(--border-color);
    border-radius: 16px;
    overflow: hidden;
}

.compare-row {
    display: grid;
    grid-template-columns: 1fr 1fr 1fr;
}

.compare-row > div {
    padding: 14px;
    border-right: 1px solid var(--border-color);
    border-top: 1px solid var(--border-color);
    color: var(--secondary-text);
    font-size: 15px;
}

.compare-row > div:last-child {
    border-right: none;
}

.compare-row.compare-head > div {
    border-top: none;
    text-transform: uppercase;
    letter-spacing: 1px;
    color: var(--text-color);
    font-size: 12px;
}

.chat-sample {
    border: 1px solid var(--border-color);
    border-radius: 16px;
    padding: 22px;
    display: grid;
    gap: 10px;
    background: linear-gradient(180deg, rgba(255, 255, 255, 0.03), rgba(255, 255, 255, 0));
}

.bubble {
    max-width: 88%;
    padding: 14px 16px;
    border-radius: 14px;
    font-size: 15px;
}

.bubble-user {
    margin-left: auto;
    background: var(--text-color);
    color: var(--bg-color);
}

.bubble-agent {
    margin-right: auto;
    border: 1px solid var(--border-color);
    background: rgba(255, 255, 255, 0.03);
}

.steps {
    display: grid;
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 14px;
}

.step {
    padding: 22px;
}

.step span {
    display: inline-flex;
    width: 34px;
    height: 34px;
    align-items: center;
    justify-content: center;
    border-radius: 999px;
    border: 1px solid var(--border-color);
    font-size: 12px;
}

.step h3 {
    margin-top: 14px;
    font-size: 16px;
    text-transform: uppercase;
    letter-spacing: 1px;
    font-weight: 300;
}

.step p {
    margin-top: 10px;
    color: var(--secondary-text);
    font-size: 14px;
}

.pricing-model {
    padding: 24px;
}

.pricing-model p {
    font-size: 18px;
    line-height: 1.7;
}

.pricing-model ul {
    margin-top: 14px;
    padding-left: 20px;
    color: var(--secondary-text);
}

.pricing-model li + li {
    margin-top: 8px;
}

.faq-list {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 14px;
}

.faq-item {
    padding: 22px;
}

.faq-item h3 {
    font-size: 18px;
    font-weight: 300;
    text-transform: uppercase;
    line-height: 1.3;
}

.faq-item p {
    margin-top: 12px;
    color: var(--secondary-text);
}

.cta {
    text-align: center;
}

.cta h2 {
    font-size: clamp(30px, 4.8vw, 58px);
    line-height: 1.08;
    text-transform: uppercase;
    letter-spacing: 2px;
    font-weight: 300;
}

.cta p {
    margin: 18px auto 0;
    max-width: 860px;
    color: var(--secondary-text);
    font-size: 18px;
}

.cta .hero-actions {
    justify-content: center;
}

.footer {
    border-top: 1px solid var(--border-color);
    padding: 28px 0 34px;
}

.footer-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 18px;
}

.footer p {
    color: var(--secondary-text);
    font-size: 14px;
}

.footer-links {
    display: flex;
    gap: 14px;
    flex-wrap: wrap;
}

.footer-links a {
    color: var(--secondary-text);
    font-size: 14px;
    text-decoration: none;
}

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

@media (max-width: 1024px) {
    .steps {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }

    .faq-list {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }
}

@media (max-width: 860px) {
    .container {
        padding: 0 16px;
    }

    .hero {
        min-height: auto;
        padding-top: 112px;
    }

    .nav-toggle {
        display: flex;
        order: 2;
    }

    .nav-links {
        position: absolute;
        top: 100%;
        left: 16px;
        right: 16px;
        border: 1px solid var(--border-color);
        border-radius: 14px;
        background: rgba(10, 10, 10, 0.98);
        padding: 12px;
        display: none;
        flex-direction: column;
        gap: 10px;
        align-items: stretch;
    }

    .nav-links.active {
        display: flex;
    }

    .nav-links a {
        padding: 10px 12px;
        border-radius: 10px;
        border: 1px solid transparent;
    }

    .nav-links a:hover {
        border-color: var(--border-color);
        background: rgba(255, 255, 255, 0.03);
    }

    .hero-metrics,
    .card-grid,
    .faq-list {
        grid-template-columns: 1fr;
    }

    .compare {
        border: none;
        border-radius: 0;
    }

    .compare-row {
        grid-template-columns: 1fr;
        margin-bottom: 10px;
        border: 1px solid var(--border-color);
        border-radius: 14px;
        overflow: hidden;
    }

    .compare-row > div {
        border-right: none;
    }

    .compare-row.compare-head {
        display: none;
    }

    .bubble {
        max-width: 100%;
    }

    .footer-inner {
        flex-direction: column;
        align-items: flex-start;
    }
}

@media (max-width: 520px) {
    .section {
        padding: 72px 0;
    }

    .hero-title,
    .section-head h2,
    .cta h2 {
        letter-spacing: 1px;
    }

    .hero-actions {
        flex-direction: column;
    }

    .btn {
        width: 100%;
    }

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