/* ======================================================
   Tathi — tathi.com.br
   Dark professional consultancy theme
   ====================================================== */

/* ---------- Reset & Base ---------- */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

:root {
    /* Dark palette */
    --color-bg:         #0a0f1e;
    --color-bg-card:    #111827;
    --color-bg-raised:  #1a2236;
    --color-bg-nav:     rgba(10,15,30,.92);
    --color-text:       #e2e8f0;
    --color-text-muted: #94a3b8;
    --color-text-dim:   #64748b;
    --color-primary:    #3b82f6;
    --color-primary-h:  #2563eb;
    --color-accent:     #38bdf8;
    --color-accent-dim: rgba(56,189,248,.12);
    --color-border:     rgba(255,255,255,.08);
    --color-border-lit: rgba(255,255,255,.12);
    --color-success:    #22c55e;
    --color-white:      #ffffff;
    --font:             'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    --radius:           12px;
    --radius-sm:        8px;
    --shadow:           0 1px 3px rgba(0,0,0,.3), 0 1px 2px rgba(0,0,0,.2);
    --shadow-lg:        0 10px 30px rgba(0,0,0,.4);
    --shadow-glow:      0 0 30px rgba(56,189,248,.08);
    --transition:       .2s ease;
    --max-w:            1200px;
    --max-w-narrow:     800px;
}

html { scroll-behavior: smooth; font-size: 16px; }
body {
    font-family: var(--font);
    color: var(--color-text);
    background: var(--color-bg);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
}
a { color: var(--color-accent); text-decoration: none; transition: color var(--transition); }
a:hover { color: var(--color-primary); }
img { max-width: 100%; display: block; }
ul { list-style: none; }

/* ---------- Nav ---------- */
.nav {
    position: fixed; top: 0; left: 0; right: 0; z-index: 1000;
    background: var(--color-bg-nav);
    backdrop-filter: blur(16px);
    border-bottom: 1px solid var(--color-border);
    transition: background var(--transition), box-shadow var(--transition);
}
.nav__container {
    max-width: var(--max-w);
    margin: 0 auto;
    display: flex; align-items: center; justify-content: space-between;
    padding: .75rem 1.5rem;
}
.nav__logo {
    font-size: 1.25rem; font-weight: 700; color: var(--color-white);
    display: flex; align-items: center; gap: .4rem;
}
.nav__logo:hover { color: var(--color-accent); }
.nav__logo-icon { font-size: 1.1rem; }
.nav__links {
    display: flex; align-items: center; gap: 1.75rem;
}
.nav__links a {
    font-size: .875rem; font-weight: 500; color: var(--color-text-muted);
    transition: color var(--transition);
}
.nav__links a:hover { color: var(--color-accent); }
.nav__cta {
    background: var(--color-primary) !important; color: var(--color-white) !important;
    padding: .5rem 1.25rem; border-radius: var(--radius-sm);
    transition: background var(--transition) !important;
}
.nav__cta:hover { background: var(--color-primary-h) !important; }
.nav__toggle { display: none; background: none; border: none; cursor: pointer; flex-direction: column; gap: 4px; padding: 4px; }
.nav__toggle span { display: block; width: 22px; height: 2px; background: var(--color-text); border-radius: 1px; transition: var(--transition); }

/* ---------- Hero ---------- */
.hero {
    padding: 10rem 1.5rem 5rem;
    background: radial-gradient(ellipse at 30% 20%, rgba(59,130,246,.12) 0%, transparent 60%),
                radial-gradient(ellipse at 70% 80%, rgba(56,189,248,.08) 0%, transparent 50%),
                linear-gradient(180deg, #080d1c 0%, var(--color-bg) 100%);
    text-align: center;
}
.hero__container { max-width: var(--max-w-narrow); margin: 0 auto; }
.hero__badge {
    display: inline-block; font-size: .7rem; font-weight: 600;
    letter-spacing: .08em; text-transform: uppercase;
    padding: .4rem 1rem; border-radius: 999px;
    background: var(--color-accent-dim); color: var(--color-accent);
    border: 1px solid rgba(56,189,248,.2);
    margin-bottom: 1.5rem;
}
.hero__title { font-size: clamp(2rem, 5vw, 3.25rem); font-weight: 800; line-height: 1.15; margin-bottom: 1.25rem; color: var(--color-white); }
.hero__highlight { color: var(--color-accent); }
.hero__subtitle { font-size: 1.1rem; color: var(--color-text-muted); max-width: 600px; margin: 0 auto 2rem; }
.hero__actions { display: flex; gap: 1rem; justify-content: center; flex-wrap: wrap; margin-bottom: 3rem; }
.hero__stats { display: flex; justify-content: center; gap: 3rem; flex-wrap: wrap; }
.hero__stat { text-align: center; }
.hero__stat-value { display: block; font-size: 1.5rem; font-weight: 700; color: var(--color-accent); }
.hero__stat-label { font-size: .75rem; color: var(--color-text-dim); text-transform: uppercase; letter-spacing: .05em; }

/* ---------- Buttons ---------- */
.btn {
    display: inline-flex; align-items: center; justify-content: center;
    font-size: .9375rem; font-weight: 600; border-radius: var(--radius-sm);
    padding: .75rem 1.75rem; transition: all var(--transition); cursor: pointer;
    border: 2px solid transparent; text-decoration: none;
}
.btn--primary { background: var(--color-primary); color: var(--color-white); border-color: var(--color-primary); }
.btn--primary:hover { background: var(--color-primary-h); border-color: var(--color-primary-h); color: var(--color-white); }
.btn--outline { background: transparent; color: var(--color-text); border-color: var(--color-border-lit); }
.btn--outline:hover { border-color: var(--color-accent); color: var(--color-accent); }
.btn--full { width: 100%; }
.btn--lg { font-size: 1.0625rem; padding: 1rem 2.5rem; }

/* ---------- Sections ---------- */
.section { padding: 5rem 1.5rem; }
.section--alt { background: var(--color-bg-card); }
.section--dark { background: var(--color-bg); color: var(--color-white); }
.section--dark .section__subtitle { color: var(--color-text-muted); }
.section--dark .btn--outline { color: var(--color-text); border-color: var(--color-border-lit); }
.section--dark .btn--outline:hover { border-color: var(--color-accent); color: var(--color-accent); }
.section__container { max-width: var(--max-w); margin: 0 auto; }
.section__container--narrow { max-width: var(--max-w-narrow); }
.section__label {
    display: inline-block; font-size: .75rem; font-weight: 600;
    text-transform: uppercase; letter-spacing: .1em;
    color: var(--color-accent); margin-bottom: .5rem;
}
.section__title { font-size: clamp(1.5rem, 3.5vw, 2.25rem); font-weight: 700; margin-bottom: .75rem; color: var(--color-white); }
.section__subtitle { color: var(--color-text-muted); font-size: 1.05rem; margin-bottom: 3rem; max-width: 650px; }

/* ---------- Services Grid ---------- */
.services-grid {
    display: grid; grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
    gap: 1.5rem;
}
.service-card {
    background: var(--color-bg-raised); border: 1px solid var(--color-border);
    border-radius: var(--radius); padding: 2rem;
    transition: box-shadow var(--transition), transform var(--transition), border-color var(--transition);
}
.service-card:hover { box-shadow: var(--shadow-glow); transform: translateY(-2px); border-color: var(--color-border-lit); }
.service-card__icon { font-size: 2rem; margin-bottom: .75rem; }
.service-card__title { font-size: 1.1rem; font-weight: 600; margin-bottom: .5rem; color: var(--color-white); }
.service-card__desc { font-size: .9rem; color: var(--color-text-muted); line-height: 1.6; }

/* ---------- Products Grid ---------- */
.products-grid {
    display: grid; grid-template-columns: 1fr; gap: 1.5rem;
    max-width: 700px; margin: 0 auto;
}
.product-card {
    position: relative;
    background: var(--color-bg-raised); border: 1px solid var(--color-border);
    border-radius: var(--radius); padding: 2.5rem;
    transition: box-shadow var(--transition), transform var(--transition), border-color var(--transition);
    color: var(--color-text); text-decoration: none; display: block;
}
.product-card:hover { box-shadow: 0 8px 30px rgba(56,189,248,.12); transform: translateY(-2px); border-color: var(--color-accent); color: var(--color-text); }
.product-card--featured { border-color: rgba(56,189,248,.3); }
.product-card__badge {
    position: absolute; top: 1rem; right: 1rem;
    background: var(--color-success); color: var(--color-white);
    font-size: .7rem; font-weight: 700; text-transform: uppercase; letter-spacing: .05em;
    padding: .25rem .75rem; border-radius: 999px;
}
.product-card__icon { font-size: 2.5rem; margin-bottom: 1rem; }
.product-card__title { font-size: 1.5rem; font-weight: 700; margin-bottom: .25rem; color: var(--color-white); }
.product-card__tagline { font-size: .9rem; color: var(--color-accent); font-weight: 500; margin-bottom: 1rem; }
.product-card__desc { font-size: .9rem; color: var(--color-text-muted); line-height: 1.7; margin-bottom: 1.25rem; }
.product-card__tech {
    display: flex; flex-wrap: wrap; gap: .5rem; margin-bottom: 1.25rem;
}
.product-card__tech li {
    font-size: .75rem; font-weight: 500; color: var(--color-accent);
    background: var(--color-accent-dim); padding: .25rem .75rem;
    border-radius: 999px; border: 1px solid rgba(56,189,248,.2);
}
.product-card__link { font-size: .9rem; font-weight: 600; color: var(--color-accent); }

/* ---------- About Grid ---------- */
.about-grid {
    display: grid; grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 2rem; margin-bottom: 2.5rem;
}
.about-card {
    background: var(--color-bg-raised); border: 1px solid var(--color-border);
    border-radius: var(--radius); padding: 2rem;
}
.about-card__header { display: flex; align-items: center; gap: .75rem; margin-bottom: 1rem; flex-wrap: wrap; }
.about-card__header h3 { font-size: 1.25rem; font-weight: 700; color: var(--color-white); }
.about-card__icon { font-size: 1.25rem; }
.about-card__tag {
    font-size: .65rem; font-weight: 600; text-transform: uppercase;
    letter-spacing: .05em; color: var(--color-accent);
    background: var(--color-accent-dim); padding: .2rem .6rem;
    border-radius: 999px;
}
.about-card p { font-size: .9rem; color: var(--color-text-muted); margin-bottom: .75rem; line-height: 1.7; }
.about-card strong { color: var(--color-text); }
.about-card__list { padding-left: 1.25rem; margin-bottom: .75rem; }
.about-card__list li {
    font-size: .875rem; color: var(--color-text-muted);
    position: relative; padding-left: .75rem; margin-bottom: .35rem;
}
.about-card__list li::before { content: '→'; position: absolute; left: -.25rem; color: var(--color-accent); font-size: .8rem; }
.about-card__url { font-size: .8rem; color: var(--color-text-dim); }
.about-card__url a { color: var(--color-accent); font-weight: 500; }

.about-company { text-align: center; }
.about-company__box {
    display: inline-block; text-align: center;
    background: linear-gradient(135deg, rgba(59,130,246,.06), rgba(56,189,248,.06));
    border: 1px solid var(--color-border);
    border-radius: var(--radius); padding: 2rem 3rem;
    max-width: 600px;
}
.about-company__box h4 {
    font-size: .75rem; text-transform: uppercase; letter-spacing: .1em;
    color: var(--color-text-dim); margin-bottom: .5rem;
}
.about-company__box p { font-size: .95rem; color: var(--color-text); margin-bottom: .35rem; }
.about-company__note {
    font-size: .85rem !important; color: var(--color-text-muted) !important;
    margin-top: .75rem !important; line-height: 1.6;
}

/* ---------- Pricing Grid ---------- */
.pricing-grid {
    display: grid; grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 1.5rem; align-items: start;
}
.pricing-card {
    background: var(--color-bg-raised); border: 1px solid var(--color-border);
    border-radius: var(--radius); padding: 2rem; position: relative;
    transition: border-color var(--transition), box-shadow var(--transition);
}
.pricing-card:hover { border-color: var(--color-border-lit); }
.pricing-card--featured {
    border-color: var(--color-accent);
    box-shadow: var(--shadow-glow);
}
.pricing-card__badge {
    position: absolute; top: -12px; right: 1.5rem;
    background: var(--color-accent); color: var(--color-bg);
    font-size: .7rem; font-weight: 700; text-transform: uppercase;
    padding: .3rem .75rem; border-radius: 999px;
}
.pricing-card__header { margin-bottom: 1.25rem; }
.pricing-card__emoji { font-size: 1.75rem; display: block; margin-bottom: .5rem; }
.pricing-card__header h3 { font-size: 1.3rem; font-weight: 700; color: var(--color-white); }
.pricing-card__price { margin-bottom: 1rem; }
.pricing-card__hours { display: block; font-size: .8rem; color: var(--color-text-dim); margin-bottom: .25rem; }
.pricing-card__value { display: block; font-size: 2rem; font-weight: 800; color: var(--color-white); }
.pricing-card__perh { font-size: .8rem; color: var(--color-text-dim); }
.pricing-card__discount { color: var(--color-success); font-weight: 600; }
.pricing-card__desc { font-size: .85rem; color: var(--color-text-muted); margin-bottom: 1.25rem; line-height: 1.6; }
.pricing-card__features { margin-bottom: 1.5rem; }
.pricing-card__features li {
    font-size: .85rem; color: var(--color-text-muted); padding: .3rem 0;
    border-bottom: 1px solid var(--color-border);
}
.pricing-card__features li:last-child { border-bottom: none; }
.pricing-rules {
    text-align: center; margin-top: 2rem; font-size: .8rem; color: var(--color-text-dim);
}

/* ---------- FAQ ---------- */
.faq-list { display: flex; flex-direction: column; gap: .75rem; }
.faq-item {
    background: var(--color-bg-raised); border: 1px solid var(--color-border);
    border-radius: var(--radius-sm);
    transition: border-color var(--transition);
}
.faq-item[open] { border-color: var(--color-accent); }
.faq-item__question {
    padding: 1.25rem 1.5rem; font-size: .95rem; font-weight: 600;
    cursor: pointer; list-style: none; display: flex; align-items: center;
    justify-content: space-between; color: var(--color-text);
}
.faq-item__question::-webkit-details-marker { display: none; }
.faq-item__question::after { content: '+'; font-size: 1.25rem; font-weight: 300; color: var(--color-text-dim); transition: transform var(--transition); }
.faq-item[open] .faq-item__question::after { content: '−'; color: var(--color-accent); }
.faq-item__answer {
    padding: 0 1.5rem 1.25rem; font-size: .9rem;
    color: var(--color-text-muted); line-height: 1.7;
}
.faq-item__answer a { color: var(--color-accent); font-weight: 500; }

/* ---------- Contact ---------- */
.contact-actions { margin-top: 1.5rem; }

/* ---------- Footer ---------- */
.footer {
    background: #060a16; color: var(--color-text-dim); padding: 3rem 1.5rem 2rem;
    border-top: 1px solid var(--color-border);
}
.footer__container { max-width: var(--max-w); margin: 0 auto; }
.footer__grid {
    display: grid; grid-template-columns: 2fr 1fr 1fr 1fr;
    gap: 2rem; margin-bottom: 2rem;
}
.footer__logo { font-size: 1.1rem; font-weight: 700; color: var(--color-white); display: block; margin-bottom: .5rem; }
.footer__legal-name { font-size: .8rem; margin-bottom: .15rem; }
.footer__cnpj { font-size: .75rem; color: var(--color-text-dim); }
.footer__links h4 { font-size: .75rem; font-weight: 600; text-transform: uppercase; letter-spacing: .08em; color: var(--color-text-muted); margin-bottom: .75rem; }
.footer__links li { margin-bottom: .4rem; }
.footer__links a { font-size: .85rem; color: var(--color-text-dim); }
.footer__links a:hover { color: var(--color-accent); }
.footer__bottom { border-top: 1px solid var(--color-border); padding-top: 1.5rem; text-align: center; font-size: .75rem; color: var(--color-text-dim); }

/* ---------- WhatsApp Float ---------- */
.whatsapp-float {
    position: fixed; bottom: 1.5rem; right: 1.5rem; z-index: 999;
    background: #25d366; color: var(--color-white);
    width: 56px; height: 56px; border-radius: 50%;
    display: flex; align-items: center; justify-content: center;
    box-shadow: 0 4px 12px rgba(37,211,102,.4);
    transition: transform var(--transition), box-shadow var(--transition);
}
.whatsapp-float:hover { transform: scale(1.1); box-shadow: 0 6px 20px rgba(37,211,102,.5); color: var(--color-white); }

/* ---------- Responsive ---------- */
@media (max-width: 768px) {
    .nav__links {
        display: none; flex-direction: column; gap: 0;
        position: absolute; top: 100%; left: 0; right: 0;
        background: var(--color-bg-card); border-bottom: 1px solid var(--color-border);
        padding: 1rem 0;
    }
    .nav__links.active { display: flex; }
    .nav__links li { padding: .75rem 1.5rem; }
    .nav__links a { font-size: 1rem; }
    .nav__cta { margin: .5rem 1.5rem; text-align: center; display: block; }
    .nav__toggle { display: flex; }

    .hero { padding: 7rem 1.5rem 3.5rem; }
    .hero__stats { gap: 1.5rem; }

    .services-grid { grid-template-columns: 1fr; }
    .about-grid { grid-template-columns: 1fr; }
    .pricing-grid { grid-template-columns: 1fr; }

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

    .about-company__box { padding: 1.5rem; }
}

@media (max-width: 480px) {
    .hero__title { font-size: 1.75rem; }
    .hero__actions { flex-direction: column; }
    .footer__grid { grid-template-columns: 1fr; }
}