/* ==========================================================================
   OBY — sistema de design compartilhado
   Editorial minimalista: tipografia grande, muito espaço em branco,
   fotografia em destaque, hairlines no lugar de sombra/gradiente.
   ========================================================================== */

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

:root {
    /* Paleta */
    --paper: #f6f1e9;
    --paper-alt: #ffffff;
    --ink: #1c1a17;
    --ink-soft: #5c564d;
    --ink-faint: #8a8377;
    --line: rgba(28, 26, 23, 0.14);
    --line-soft: rgba(28, 26, 23, 0.08);
    --accent: #a8451f;
    --accent-soft: rgba(168, 69, 31, 0.08);

    /* Tipografia */
    --font-display: 'Poppins', sans-serif;
    --font-body: 'Inter', sans-serif;

    /* Layout */
    --container-w: 1320px;
    --gutter: clamp(1.5rem, 4vw, 3.5rem);
    --section-pad: clamp(5rem, 10vw, 9rem);
}

html { scroll-behavior: smooth; }

body {
    font-family: var(--font-body);
    font-weight: 400;
    color: var(--ink);
    background: var(--paper);
    line-height: 1.65;
    -webkit-font-smoothing: antialiased;
}

img { display: block; max-width: 100%; }

a { color: inherit; }

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

/* ---------------------------------------------------------------------- */
/* Tipografia editorial                                                    */
/* ---------------------------------------------------------------------- */

.eyebrow {
    display: inline-flex;
    align-items: center;
    gap: 0.75rem;
    font-family: var(--font-body);
    font-size: 0.75rem;
    font-weight: 600;
    letter-spacing: 0.18em;
    text-transform: uppercase;
    color: var(--accent);
}

.eyebrow::before {
    content: '';
    width: 28px;
    height: 1px;
    background: var(--accent);
}

.display-xl {
    font-family: var(--font-display);
    font-weight: 600;
    letter-spacing: -0.02em;
    line-height: 1.04;
    font-size: clamp(2.75rem, 3vw + 2rem, 6.25rem);
}

.display-lg {
    font-family: var(--font-display);
    font-weight: 600;
    letter-spacing: -0.01em;
    line-height: 1.1;
    font-size: clamp(2.25rem, 2vw + 1.75rem, 3.75rem);
}

.display-md {
    font-family: var(--font-display);
    font-weight: 600;
    letter-spacing: -0.01em;
    line-height: 1.2;
    font-size: clamp(1.75rem, 1.2vw + 1.4rem, 2.5rem);
}

.lede {
    font-size: clamp(1.05rem, 0.4vw + 1rem, 1.3rem);
    color: var(--ink-soft);
    font-weight: 300;
    line-height: 1.75;
}

/* ---------------------------------------------------------------------- */
/* Regras e ritmo de seção                                                 */
/* ---------------------------------------------------------------------- */

.rule { border: none; border-top: 1px solid var(--line); }

.section { padding: var(--section-pad) 0; position: relative; }
.section--bordered { border-top: 1px solid var(--line); }
.section--alt { background: var(--paper-alt); }
.section--ink { background: var(--ink); color: var(--paper); }

/* ---------------------------------------------------------------------- */
/* Botões e links                                                          */
/* ---------------------------------------------------------------------- */

.btn {
    display: inline-flex;
    align-items: center;
    gap: 0.6rem;
    font-family: var(--font-body);
    font-size: 0.9rem;
    font-weight: 500;
    letter-spacing: 0.02em;
    padding: 1rem 2.1rem;
    border-radius: 3px;
    text-decoration: none;
    border: 1px solid var(--ink);
    transition: background 0.25s ease, color 0.25s ease, border-color 0.25s ease, transform 0.25s ease;
}

.btn--primary {
    background: var(--ink);
    color: var(--paper);
}

.btn--primary:hover {
    background: var(--accent);
    border-color: var(--accent);
    transform: translateY(-2px);
}

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

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

.btn--on-ink {
    border-color: var(--paper);
    color: var(--paper);
}

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

.link-arrow {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.9rem;
    font-weight: 500;
    text-decoration: none;
    color: var(--ink);
    border-bottom: 1px solid var(--line);
    padding-bottom: 0.2rem;
    transition: color 0.25s ease, border-color 0.25s ease;
}

.link-arrow span { transition: transform 0.25s ease; }

.link-arrow:hover {
    color: var(--accent);
    border-color: var(--accent);
}

.link-arrow:hover span { transform: translateX(4px); }

/* ---------------------------------------------------------------------- */
/* Header                                                                   */
/* ---------------------------------------------------------------------- */

.site-header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    z-index: 1000;
    padding: 1.6rem 0;
    background: transparent;
    border-bottom: 1px solid transparent;
    transition: background 0.35s ease, border-color 0.35s ease, padding 0.35s ease;
}

.site-header.is-scrolled,
.site-header.is-solid {
    background: rgba(246, 241, 233, 0.94);
    backdrop-filter: blur(10px);
    border-bottom-color: var(--line);
    padding: 1.1rem 0;
}

.site-header__inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.wordmark {
    display: flex;
    align-items: center;
    gap: 0.7rem;
    text-decoration: none;
    color: var(--ink);
}

.wordmark img { height: 38px; width: auto; }

.wordmark span {
    font-family: var(--font-display);
    font-weight: 600;
    font-size: 1.25rem;
    letter-spacing: 0.02em;
}

.site-nav {
    display: flex;
    align-items: center;
    gap: 2.75rem;
    list-style: none;
}

.site-nav a {
    font-size: 0.85rem;
    font-weight: 500;
    letter-spacing: 0.03em;
    text-decoration: none;
    color: var(--ink);
    position: relative;
    padding-bottom: 4px;
}

.site-nav a::after {
    content: '';
    position: absolute;
    left: 0;
    bottom: 0;
    width: 0;
    height: 1px;
    background: var(--accent);
    transition: width 0.25s ease;
}

.site-nav a:hover { color: var(--accent); }
.site-nav a:hover::after { width: 100%; }

.site-nav .nav-cta {
    border: 1px solid var(--ink);
    padding: 0.65rem 1.4rem;
    border-radius: 3px;
    transition: background 0.25s ease, color 0.25s ease, border-color 0.25s ease;
}

.site-nav .nav-cta::after { display: none; }

.site-nav .nav-cta:hover {
    background: var(--ink);
    color: var(--paper);
}

.menu-toggle {
    display: none;
    flex-direction: column;
    justify-content: center;
    gap: 5px;
    width: 34px;
    height: 34px;
    background: none;
    border: none;
    cursor: pointer;
    z-index: 1100;
}

.menu-toggle span {
    display: block;
    height: 1px;
    width: 100%;
    background: var(--ink);
    transition: transform 0.3s ease, opacity 0.3s ease;
}

/* ---------------------------------------------------------------------- */
/* Footer                                                                    */
/* ---------------------------------------------------------------------- */

.site-footer {
    background: var(--ink);
    color: rgba(246, 241, 233, 0.7);
    padding: 5rem 0 2.5rem;
}

.site-footer .wordmark { color: var(--paper); }

.footer-top {
    display: grid;
    grid-template-columns: 1.4fr 1fr 1fr;
    gap: 3rem;
    padding-bottom: 3.5rem;
}

.footer-brand p {
    margin-top: 1.25rem;
    max-width: 32ch;
    font-weight: 300;
    color: rgba(246, 241, 233, 0.65);
}

.footer-col h4 {
    font-family: var(--font-body);
    font-size: 0.75rem;
    font-weight: 600;
    letter-spacing: 0.14em;
    text-transform: uppercase;
    color: rgba(246, 241, 233, 0.5);
    margin-bottom: 1.25rem;
}

.footer-col a,
.footer-col p {
    display: block;
    margin-bottom: 0.8rem;
    text-decoration: none;
    color: rgba(246, 241, 233, 0.85);
    font-size: 0.95rem;
    font-weight: 300;
}

.footer-col a:hover { color: var(--paper); }

.footer-bottom {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 1rem;
    flex-wrap: wrap;
    padding-top: 2rem;
    border-top: 1px solid rgba(246, 241, 233, 0.14);
    font-size: 0.8rem;
    color: rgba(246, 241, 233, 0.45);
}

/* ---------------------------------------------------------------------- */
/* Reveal on scroll                                                          */
/* ---------------------------------------------------------------------- */

.reveal {
    opacity: 0;
    transform: translateY(24px);
    transition: opacity 0.7s ease, transform 0.7s ease;
}

.reveal.is-visible {
    opacity: 1;
    transform: translateY(0);
}

[data-parallax] { will-change: transform; }

@media (prefers-reduced-motion: reduce) {
    .reveal {
        transition: none;
        opacity: 1;
        transform: none;
    }

    [data-parallax] { transform: none !important; }
}

/* ---------------------------------------------------------------------- */
/* Responsivo                                                                */
/* ---------------------------------------------------------------------- */

@media (max-width: 960px) {
    .site-nav {
        position: fixed;
        inset: 0;
        flex-direction: column;
        justify-content: center;
        align-items: flex-start;
        gap: 2rem;
        padding: 0 2rem;
        background: var(--paper);
        transform: translateX(100%);
        transition: transform 0.4s ease;
    }

    .site-nav.is-open { transform: translateX(0); }

    .site-nav a { font-size: 1.6rem; }

    .menu-toggle { display: flex; }

    .menu-toggle.is-open span:nth-child(1) { transform: translateY(6px) rotate(45deg); }
    .menu-toggle.is-open span:nth-child(2) { opacity: 0; }
    .menu-toggle.is-open span:nth-child(3) { transform: translateY(-6px) rotate(-45deg); }

    .footer-top { grid-template-columns: 1fr; gap: 2.5rem; }
}