/* ============================================================================
   Charl.IA — landing pública
   Paleta tomada del propio logo: azul marino #16263f + ámbar #f59e0b.
   Sin dependencias más allá de la tipografía y los iconos que carga el HTML.
   ========================================================================== */

:root {
    --ch-navy: #16263f;
    --ch-navy-2: #0f1b30;
    --ch-navy-3: #24405f;
    --ch-amber: #f59e0b;
    --ch-amber-dark: #d97706;
    --ch-amber-soft: #fef3c7;
    --ch-gradient: linear-gradient(135deg, #16263f 0%, #24405f 100%);
    --ch-gradient-amber: linear-gradient(135deg, #f59e0b 0%, #d97706 100%);
    --ch-ink: #0f1b30;
    --ch-muted: #5b6a80;
    --ch-bg: #ffffff;
    --ch-bg-soft: #f1f4f9;
    --ch-line: #e2e8f2;
    --ch-radius: 16px;
    --ch-shadow: 0 12px 40px rgba(15,27,48,.09);
    --ch-wa: #25d366;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }

body {
    font-family: 'Inter', system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
    color: var(--ch-ink);
    background: var(--ch-bg);
    margin: 0;
    line-height: 1.6;
}

img { max-width: 100%; display: block; }
a { text-decoration: none; }

.ch-container { width: 100%; max-width: 1140px; margin: 0 auto; padding: 0 20px; }
.ch-muted { color: var(--ch-muted); }

/* ---------- Navbar ---------- */
.ch-nav {
    position: fixed; top: 0; left: 0; right: 0; z-index: 100;
    background: rgba(255,255,255,.93); backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--ch-line);
}
.ch-nav-inner { display: flex; align-items: center; justify-content: space-between; height: 68px; }
.ch-brand { display: flex; align-items: center; gap: 10px; }
.ch-brand img { height: 34px; width: auto; }
.ch-nav-links { display: flex; align-items: center; gap: 26px; }
.ch-nav-links a { color: var(--ch-ink); font-weight: 500; font-size: .95rem; transition: color .2s; }
.ch-nav-links a:hover { color: var(--ch-amber-dark); }
.ch-nav-toggle { display: none; background: none; border: 0; font-size: 1.5rem; color: var(--ch-navy); cursor: pointer; }

/* ---------- Botones ---------- */
.ch-btn {
    display: inline-flex; align-items: center; gap: 8px; justify-content: center;
    padding: 12px 24px; border-radius: 999px; font-weight: 600; font-size: .95rem;
    border: 2px solid transparent; cursor: pointer;
    transition: transform .15s, box-shadow .2s, background .2s, color .2s;
}
.ch-btn-primary { background: var(--ch-gradient-amber); color: #16263f; box-shadow: 0 8px 22px rgba(245,158,11,.32); }
.ch-btn-primary:hover { transform: translateY(-2px); box-shadow: 0 12px 30px rgba(245,158,11,.42); color: #16263f; }
.ch-btn-outline { border-color: var(--ch-navy); color: var(--ch-navy); background: transparent; }
.ch-btn-outline:hover { background: var(--ch-navy); color: #fff; }
.ch-btn-light { background: #fff; color: var(--ch-navy); }
.ch-btn-light:hover { transform: translateY(-2px); color: var(--ch-navy-2); }
.ch-btn-wa { background: var(--ch-wa); color: #fff; box-shadow: 0 8px 22px rgba(37,211,102,.30); }
.ch-btn-wa:hover { transform: translateY(-2px); color: #fff; box-shadow: 0 12px 30px rgba(37,211,102,.40); }

/* ---------- Encabezados de sección ---------- */
.ch-section { padding: 84px 0; }
.ch-section-soft { background: var(--ch-bg-soft); }
.ch-section-dark { background: var(--ch-gradient); color: #fff; }
.ch-section-head { text-align: center; max-width: 720px; margin: 0 auto 48px; }
.ch-section-head h2 { font-size: clamp(1.7rem, 3.4vw, 2.4rem); margin: 0 0 14px; line-height: 1.2; }
.ch-section-head p { color: var(--ch-muted); margin: 0; font-size: 1.05rem; }
.ch-section-dark .ch-section-head p { color: #c3d0e2; }

.ch-eyebrow {
    display: inline-block; background: rgba(245,158,11,.14); color: var(--ch-amber-dark);
    font-weight: 700; font-size: .78rem; letter-spacing: .07em; text-transform: uppercase;
    padding: 6px 14px; border-radius: 999px; margin-bottom: 16px;
}
.ch-section-dark .ch-eyebrow { background: rgba(245,158,11,.22); color: var(--ch-amber); }

/* ---------- Hero ---------- */
.ch-hero {
    position: relative; padding: 140px 0 84px; overflow: hidden;
    background: radial-gradient(1100px 480px at 85% -10%, rgba(245,158,11,.13), transparent 60%),
                radial-gradient(900px 500px at 0% 0%, rgba(22,38,63,.10), transparent 55%),
                var(--ch-bg-soft);
}
.ch-hero-grid { display: grid; grid-template-columns: 1.05fr .95fr; gap: 48px; align-items: center; }
.ch-hero h1 { font-size: clamp(2rem, 4.6vw, 3.1rem); line-height: 1.12; margin: 0 0 18px; }
.ch-hl { color: var(--ch-amber-dark); }
.ch-hero p.ch-lead { font-size: 1.12rem; color: var(--ch-muted); margin: 0 0 28px; }
.ch-hero-cta { display: flex; gap: 14px; flex-wrap: wrap; }
.ch-hero-stats { display: flex; gap: 34px; margin-top: 38px; flex-wrap: wrap; }
.ch-hero-stats .n { font-size: 1.6rem; font-weight: 800; color: var(--ch-navy); }
.ch-hero-stats .l { font-size: .86rem; color: var(--ch-muted); max-width: 150px; }

/* ---------- Simulación de chat (la pieza que vende) ---------- */
.ch-phone {
    background: #fff; border-radius: 22px; padding: 16px;
    box-shadow: var(--ch-shadow); border: 1px solid var(--ch-line);
}
.ch-phone-top {
    display: flex; align-items: center; gap: 11px;
    padding: 6px 6px 14px; border-bottom: 1px solid var(--ch-line); margin-bottom: 14px;
}
.ch-avatar {
    width: 40px; height: 40px; border-radius: 50%; background: var(--ch-gradient);
    display: grid; place-items: center; color: var(--ch-amber); font-weight: 800; flex-shrink: 0;
}
.ch-phone-name { font-weight: 700; font-size: .95rem; }
.ch-phone-state { font-size: .78rem; color: var(--ch-wa); font-weight: 600; }
.ch-chat { display: flex; flex-direction: column; gap: 10px; }
.ch-msg { max-width: 82%; padding: 10px 14px; border-radius: 14px; font-size: .92rem; line-height: 1.45; }
.ch-msg-in { align-self: flex-start; background: var(--ch-bg-soft); border-bottom-left-radius: 4px; }
.ch-msg-out { align-self: flex-end; background: #dcf8c6; border-bottom-right-radius: 4px; }
.ch-msg .t { display: block; font-size: .68rem; color: #7b8797; margin-top: 4px; text-align: right; }
.ch-phone-foot {
    margin-top: 14px; padding-top: 12px; border-top: 1px solid var(--ch-line);
    font-size: .78rem; color: var(--ch-muted); text-align: center;
}

/* ---------- Rejillas de tarjetas ---------- */
.ch-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 22px; }
.ch-grid-2 { display: grid; grid-template-columns: repeat(2, 1fr); gap: 22px; }
.ch-card {
    background: #fff; border: 1px solid var(--ch-line); border-radius: var(--ch-radius);
    padding: 26px; transition: transform .18s, box-shadow .2s;
}
.ch-card:hover { transform: translateY(-4px); box-shadow: var(--ch-shadow); }
.ch-card h3 { margin: 0 0 8px; font-size: 1.12rem; }
.ch-card p { margin: 0; color: var(--ch-muted); font-size: .95rem; }
.ch-ico {
    width: 46px; height: 46px; border-radius: 12px; background: var(--ch-amber-soft);
    color: var(--ch-amber-dark); display: grid; place-items: center; font-size: 1.15rem; margin-bottom: 16px;
}
.ch-section-dark .ch-card { background: rgba(255,255,255,.07); border-color: rgba(255,255,255,.16); }
.ch-section-dark .ch-card p { color: #c3d0e2; }
.ch-section-dark .ch-ico { background: rgba(245,158,11,.20); color: var(--ch-amber); }

/* ---------- Pasos ---------- */
.ch-steps { display: grid; grid-template-columns: repeat(3, 1fr); gap: 26px; counter-reset: paso; }
.ch-step { position: relative; padding-top: 12px; }
.ch-step .num {
    width: 44px; height: 44px; border-radius: 50%; background: var(--ch-gradient); color: var(--ch-amber);
    display: grid; place-items: center; font-weight: 800; font-size: 1.1rem; margin-bottom: 16px;
}
.ch-step h3 { margin: 0 0 8px; font-size: 1.14rem; }
.ch-step p { margin: 0; color: var(--ch-muted); font-size: .95rem; }

/* ---------- Listas de verificación ---------- */
.ch-check { list-style: none; padding: 0; margin: 0; display: grid; gap: 13px; }
.ch-check li { display: flex; gap: 12px; align-items: flex-start; font-size: .97rem; }
.ch-check i { color: var(--ch-amber); margin-top: 4px; flex-shrink: 0; }
.ch-section-dark .ch-check li { color: #e7eef7; }

/* ---------- Píldoras ---------- */
.ch-pill-row { display: flex; flex-wrap: wrap; gap: 12px; justify-content: center; }
.ch-pill {
    display: inline-flex; align-items: center; gap: 9px; background: #fff;
    border: 1px solid var(--ch-line); border-radius: 999px; padding: 11px 20px;
    font-weight: 500; font-size: .94rem;
}
.ch-pill i { color: var(--ch-amber-dark); }

/* ---------- Promotores ---------- */
.ch-promo-grid { display: grid; grid-template-columns: 1.05fr .95fr; gap: 48px; align-items: center; }
.ch-promo-box {
    background: rgba(255,255,255,.07); border: 1px solid rgba(255,255,255,.16);
    border-radius: var(--ch-radius); padding: 28px;
}
.ch-promo-box h3 { margin: 0 0 16px; font-size: 1.05rem; color: #fff; }

/* ---------- CTA final ---------- */
.ch-cta { background: var(--ch-gradient); color: #fff; border-radius: 24px; padding: 58px 40px; text-align: center; }
.ch-cta h2 { font-size: clamp(1.6rem, 3.2vw, 2.2rem); margin: 0 0 14px; }
.ch-cta p { color: #c3d0e2; margin: 0 0 28px; font-size: 1.05rem; }

/* ---------- Footer ---------- */
.ch-footer { background: var(--ch-navy-2); color: #9fb0c6; padding: 52px 0 26px; }
.ch-footer-grid { display: flex; justify-content: space-between; gap: 40px; flex-wrap: wrap; }
.ch-footer img { height: 32px; width: auto; }
.ch-footer-links { display: flex; flex-wrap: wrap; gap: 22px; align-items: flex-start; }
.ch-footer-links a { color: #9fb0c6; font-size: .93rem; }
.ch-footer-links a:hover { color: var(--ch-amber); }
.ch-footer-bottom {
    border-top: 1px solid rgba(255,255,255,.10); margin-top: 34px; padding-top: 20px;
    font-size: .87rem; text-align: center;
}
.ch-footer-bottom strong { color: #cfdae8; }

/* ---------- Botón flotante de WhatsApp ---------- */
.ch-wa {
    position: fixed; right: 20px; bottom: 20px; z-index: 200;
    width: 58px; height: 58px; border-radius: 50%; background: var(--ch-wa);
    display: grid; place-items: center; box-shadow: 0 10px 26px rgba(37,211,102,.42);
    transition: transform .18s;
}
.ch-wa:hover { transform: scale(1.07); }

/* ---------- Responsivo ---------- */
@media (max-width: 900px) {
    .ch-hero-grid, .ch-promo-grid { grid-template-columns: 1fr; }
    .ch-grid, .ch-steps { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 760px) {
    .ch-nav-toggle { display: block; }
    .ch-nav-links {
        position: absolute; top: 68px; left: 0; right: 0; background: #fff;
        flex-direction: column; align-items: stretch; gap: 0; padding: 0 20px;
        border-bottom: 1px solid var(--ch-line); max-height: 0; overflow: hidden; transition: max-height .25s;
    }
    .ch-nav-links.open { max-height: 420px; padding: 12px 20px 20px; }
    .ch-nav-links a { padding: 12px 0; }
    .ch-grid, .ch-grid-2, .ch-steps { grid-template-columns: 1fr; }
    .ch-section { padding: 60px 0; }
    .ch-hero { padding: 120px 0 64px; }
    .ch-cta { padding: 44px 24px; }
}