:root {
    --gradient-hero: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    --gradient-accent: linear-gradient(135deg, #43e97b 0%, #38f9d7 100%);
    --gradient-demo: linear-gradient(135deg, #4facfe 0%, #00f2fe 100%);
    --bg: #0f0f14;
    --surface: #16161f;
    --surface-2: #1e1e2a;
    --text: #f4f4f8;
    --text-muted: #9ca3b0;
    --border: rgba(255, 255, 255, 0.08);
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: "Segoe UI", system-ui, -apple-system, sans-serif;
    background: var(--bg);
    color: var(--text);
    line-height: 1.6;
    min-height: 100vh;
}

a {
    color: inherit;
}

.container {
    max-width: 1100px;
    margin: 0 auto;
    padding: 0 1.25rem;
}

/* Header */
.site-header {
    position: sticky;
    top: 0;
    z-index: 50;
    background: rgba(15, 15, 20, 0.85);
    backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--border);
}

.header-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 1rem;
    padding: 0.85rem 0;
    flex-wrap: wrap;
}

.logo {
    font-weight: 700;
    font-size: 1.1rem;
    letter-spacing: -0.02em;
}

.logo span {
    background: var(--gradient-hero);
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
}

.header-actions {
    display: flex;
    gap: 0.6rem;
    flex-wrap: wrap;
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.45rem;
    padding: 0.65rem 1.15rem;
    border-radius: 10px;
    font-weight: 600;
    font-size: 0.95rem;
    text-decoration: none;
    border: none;
    cursor: pointer;
    transition: transform 0.2s, box-shadow 0.2s;
}

.btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.35);
}

.btn-whatsapp {
    background: #25d366;
    color: #fff;
}

.btn-whatsapp:hover {
    box-shadow: 0 8px 24px rgba(37, 211, 102, 0.35);
}

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

.btn-ghost {
    background: transparent;
    color: var(--text);
    border: 1px solid var(--border);
}

.btn-lg {
    padding: 0.9rem 1.5rem;
    font-size: 1rem;
}

/* Hero */
.hero {
    padding: 3.5rem 0 4rem;
    text-align: center;
}

.hero-badge {
    display: inline-block;
    padding: 0.35rem 0.85rem;
    border-radius: 999px;
    background: var(--surface-2);
    border: 1px solid var(--border);
    font-size: 0.8rem;
    color: var(--text-muted);
    margin-bottom: 1.25rem;
}

.hero h1 {
    font-size: clamp(2rem, 5vw, 2.85rem);
    font-weight: 800;
    letter-spacing: -0.03em;
    line-height: 1.15;
    max-width: 720px;
    margin: 0 auto 1rem;
}

.hero h1 .highlight {
    background: var(--gradient-accent);
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
}

.hero-lead {
    font-size: 1.125rem;
    color: var(--text-muted);
    max-width: 560px;
    margin: 0 auto 2rem;
}

.hero-cta {
    display: flex;
    flex-wrap: wrap;
    gap: 0.85rem;
    justify-content: center;
    margin-bottom: 2.5rem;
}

.hero-meta {
    display: flex;
    flex-wrap: wrap;
    gap: 1.5rem;
    justify-content: center;
    color: var(--text-muted);
    font-size: 0.9rem;
}

.hero-meta strong {
    color: var(--text);
}

/* Sections */
section {
    padding: 3rem 0;
}

.section-title {
    font-size: 1.65rem;
    font-weight: 700;
    margin-bottom: 0.5rem;
}

.section-sub {
    color: var(--text-muted);
    margin-bottom: 1.75rem;
    max-width: 580px;
}

/* Features grid */
.grid {
    display: grid;
    gap: 1.25rem;
}

@media (min-width: 640px) {
    .grid-2 {
        grid-template-columns: repeat(2, 1fr);
    }

    .grid-3 {
        grid-template-columns: repeat(3, 1fr);
    }
}

.card {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: 14px;
    padding: 1.35rem;
    transition: border-color 0.2s;
}

.card:hover {
    border-color: rgba(102, 126, 234, 0.35);
}

.card-icon {
    font-size: 1.75rem;
    margin-bottom: 0.65rem;
}

.card h3 {
    font-size: 1.05rem;
    margin-bottom: 0.4rem;
}

.card p {
    color: var(--text-muted);
    font-size: 0.95rem;
}

/* Detail / service */
.detail-block {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: 16px;
    padding: 2rem;
}

.detail-block h2 {
    font-size: 1.4rem;
    margin-bottom: 1rem;
}

.detail-block ul {
    list-style: none;
    margin: 1rem 0;
}

.detail-block li {
    padding: 0.45rem 0 0.45rem 1.5rem;
    position: relative;
    color: var(--text-muted);
}

.detail-block li::before {
    content: "";
    position: absolute;
    left: 0;
    top: 0.85rem;
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: var(--gradient-accent);
}

/* CTA band */
.cta-band {
    background: var(--gradient-hero);
    border-radius: 18px;
    padding: 2.25rem;
    text-align: center;
    margin: 1rem 0;
}

.cta-band h2 {
    font-size: 1.5rem;
    margin-bottom: 0.5rem;
}

.cta-band p {
    opacity: 0.95;
    margin-bottom: 1.25rem;
    max-width: 480px;
    margin-left: auto;
    margin-right: auto;
}

.cta-band .btn-whatsapp {
    background: #fff;
    color: #128c7e;
}

.cta-band .btn-demo {
    background: rgba(255, 255, 255, 0.2);
    color: #fff;
    border: 2px solid rgba(255, 255, 255, 0.55);
}

.cta-band .btn-demo:hover {
    background: rgba(255, 255, 255, 0.95);
    color: #0f172a;
    border-color: transparent;
}

.cta-buttons {
    display: flex;
    flex-wrap: wrap;
    gap: 0.75rem;
    justify-content: center;
}

/* Footer */
.site-footer {
    border-top: 1px solid var(--border);
    padding: 2rem 0;
    text-align: center;
    color: var(--text-muted);
    font-size: 0.875rem;
}

.site-footer a {
    color: #a5b4fc;
    text-decoration: none;
}

.site-footer a:hover {
    text-decoration: underline;
}