:root {
    --color-bg: #0b1020;
    --color-bg-alt: #111832;
    --color-surface: #ffffff;
    --color-text: #1b1f2a;
    --color-muted: #5b6373;
    --color-primary: #5b5bf6;
    --color-primary-dark: #3f3fd6;
    --color-accent: #22d3ee;
    --radius: 14px;
    --max-width: 1160px;
}

* { box-sizing: border-box; }

body {
    margin: 0;
    font-family: 'Segoe UI', system-ui, -apple-system, sans-serif;
    color: var(--color-text);
    background: #f7f8fc;
    line-height: 1.6;
}

.container {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 24px;
}

a { color: var(--color-primary); text-decoration: none; }
a:hover { color: var(--color-primary-dark); }

h1, h2, h3, h4 { line-height: 1.2; margin: 0 0 0.5em; }

.btn {
    display: inline-block;
    padding: 12px 24px;
    border-radius: 999px;
    font-weight: 600;
    border: none;
    cursor: pointer;
    text-decoration: none;
}
.btn-primary { background: var(--color-primary); color: #fff; }
.btn-primary:hover { background: var(--color-primary-dark); color: #fff; }
.btn-outline { background: transparent; border: 2px solid var(--color-primary); color: var(--color-primary); }

/* Header */
.site-header {
    background: var(--color-bg);
    color: #fff;
    position: sticky;
    top: 0;
    z-index: 50;
}
.header-inner { display: flex; align-items: center; justify-content: space-between; padding: 16px 24px; }
.brand { display: inline-flex; align-items: center; }
.brand img { display: block; width: 184px; height: auto; }
.site-nav ul { list-style: none; display: flex; gap: 24px; margin: 0; padding: 0; }
.site-nav { display: flex; align-items: center; gap: 24px; }
.site-nav a { color: #cfd3ec; font-weight: 500; }
.site-nav a.active, .site-nav a:hover { color: #fff; }
.nav-cta { white-space: nowrap; }
.nav-toggle { display: none; flex-direction: column; gap: 5px; background: none; border: none; cursor: pointer; }
.nav-toggle span { width: 24px; height: 2px; background: #fff; }

/* Hero */
.hero {
    background: linear-gradient(135deg, var(--color-bg) 0%, var(--color-bg-alt) 100%);
    color: #fff;
    padding: 80px 0;
    text-align: center;
}
.hero h1 { font-size: 2.6rem; max-width: 760px; margin: 0 auto 0.4em; }
.hero p.lead { color: #cfd3ec; max-width: 620px; margin: 0 auto 2em; font-size: 1.15rem; }
.hero-actions { display: flex; gap: 16px; justify-content: center; flex-wrap: wrap; }

/* Sections */
.section { padding: 72px 0; }
.section-alt { background: #fff; }
.section-header { text-align: center; max-width: 680px; margin: 0 auto 48px; }
.section-header .eyebrow { color: var(--color-primary); font-weight: 700; letter-spacing: 0.08em; text-transform: uppercase; font-size: 0.8rem; }
.section-header h2 { font-size: 2rem; }
.section-header p { color: var(--color-muted); }

.grid { display: grid; gap: 24px; }
.grid-2 { grid-template-columns: repeat(auto-fit, minmax(260px, 1fr)); }
.grid-3 { grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); }
.grid-4 { grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); }

.card {
    background: var(--color-surface);
    border-radius: var(--radius);
    padding: 28px;
    box-shadow: 0 6px 24px rgba(20, 24, 50, 0.06);
    border: 1px solid #eceefb;
}
.card h3 { font-size: 1.15rem; }
.card .ai-tag {
    display: inline-block;
    background: rgba(91, 91, 246, 0.1);
    color: var(--color-primary);
    font-size: 0.75rem;
    font-weight: 700;
    padding: 4px 10px;
    border-radius: 999px;
    margin-bottom: 10px;
}

/* Steps */
.steps { counter-reset: step; }
.step { display: flex; gap: 20px; align-items: flex-start; }
.step .step-num {
    counter-increment: step;
    flex-shrink: 0;
    width: 44px; height: 44px;
    border-radius: 50%;
    background: var(--color-primary);
    color: #fff;
    display: flex; align-items: center; justify-content: center;
    font-weight: 700;
}

/* Pricing */
.pricing-card { display: flex; flex-direction: column; }
.pricing-card.featured { border: 2px solid var(--color-primary); position: relative; }
.pricing-card .badge {
    position: absolute; top: -12px; right: 20px;
    background: var(--color-primary); color: #fff;
    font-size: 0.7rem; font-weight: 700;
    padding: 4px 10px; border-radius: 999px;
}
.pricing-card .price { font-size: 2rem; font-weight: 800; margin: 8px 0; }
.pricing-card .price span { font-size: 0.95rem; font-weight: 500; color: var(--color-muted); }
.pricing-card ul { padding-left: 20px; margin: 20px 0; flex: 1; }
.pricing-card ul li { margin-bottom: 8px; }
.pricing-card ul li.ai-item { color: var(--color-primary-dark); font-weight: 600; }

/* Forms */
.form-card { background: #fff; border-radius: var(--radius); padding: 32px; box-shadow: 0 6px 24px rgba(20,24,50,0.06); }
form label { display: block; font-weight: 600; margin-bottom: 6px; font-size: 0.9rem; }
form .field { margin-bottom: 18px; }
form input, form textarea, form select {
    width: 100%; padding: 12px 14px; border-radius: 8px;
    border: 1px solid #d9dcee; font-size: 1rem; font-family: inherit;
}
form textarea { min-height: 120px; resize: vertical; }
.form-note { font-size: 0.85rem; color: var(--color-muted); margin-top: 12px; }
.form-response { margin-top: 16px; padding: 14px; border-radius: 8px; background: #eef0ff; display: none; }
.form-response.visible { display: block; }

/* AI Widget (interactive tools) */
.ai-widget { background: linear-gradient(135deg, #eef0ff, #e6fbff); border-radius: var(--radius); padding: 28px; margin-top: 20px; }
.ai-widget h4 { margin-bottom: 4px; }
.ai-widget .result { margin-top: 16px; background: #fff; border-radius: 10px; padding: 16px; white-space: pre-wrap; display: none; }
.ai-widget .result.visible { display: block; }
.ai-widget button { margin-top: 12px; }

/* Footer */
.site-footer { background: var(--color-bg); color: #b7bce0; padding: 56px 0 0; margin-top: 80px; }
.footer-inner { display: grid; grid-template-columns: 2fr 1fr 1fr 1fr; gap: 24px; padding-bottom: 32px; }
.footer-col h4 { color: #fff; font-size: 0.85rem; text-transform: uppercase; letter-spacing: 0.05em; }
.footer-col a { color: #b7bce0; }
.footer-bottom { border-top: 1px solid rgba(255,255,255,0.1); padding: 16px 24px; font-size: 0.85rem; }

/* AI chat widget */
.ai-chat-widget { position: fixed; bottom: 24px; right: 24px; z-index: 100; }
.ai-chat-toggle {
    width: 56px; height: 56px; border-radius: 50%;
    background: var(--color-primary); color: #fff; border: none;
    font-size: 1.4rem; cursor: pointer; box-shadow: 0 8px 20px rgba(91,91,246,0.4);
}
.ai-chat-panel {
    position: absolute; bottom: 72px; right: 0;
    width: 320px; max-height: 440px;
    background: #fff; border-radius: 14px;
    box-shadow: 0 12px 40px rgba(20,24,50,0.2);
    display: flex; flex-direction: column; overflow: hidden;
}
.ai-chat-panel.hidden { display: none; }
.ai-chat-header { background: var(--color-bg); color: #fff; padding: 12px 16px; display: flex; justify-content: space-between; align-items: center; }
.ai-chat-header button { background: none; border: none; color: #fff; font-size: 1.2rem; cursor: pointer; }
.ai-chat-messages { flex: 1; padding: 12px 16px; overflow-y: auto; max-height: 280px; font-size: 0.9rem; }
.ai-msg { margin-bottom: 10px; padding: 8px 12px; border-radius: 10px; max-width: 90%; }
.ai-msg-bot { background: #eef0ff; }
.ai-msg-user { background: var(--color-primary); color: #fff; margin-left: auto; }
.ai-chat-form { display: flex; border-top: 1px solid #eceefb; }
.ai-chat-form input { border: none; flex: 1; padding: 12px; }
.ai-chat-form button { border: none; background: var(--color-primary); color: #fff; padding: 0 16px; cursor: pointer; }

@media (max-width: 860px) {
    .footer-inner { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 720px) {
    .nav-toggle { display: flex; }
    .site-nav {
        position: absolute; top: 100%; left: 0; right: 0;
        background: var(--color-bg); flex-direction: column; align-items: stretch;
        padding: 16px 24px; display: none;
    }
    .site-nav.open { display: flex; }
    .site-nav ul { flex-direction: column; gap: 14px; }
    .hero h1 { font-size: 2rem; }
}