/* ============================================================
   Bizinnt — Executive Track
   Paleta executiva sóbria: deep navy + canvas + champanhe
   ============================================================ */

:root {
    /* Bizinnt — Rebranding 2026 (paleta oficial) */
    /* Neutros acromáticos */
    --obsidian:     #0D0D0D;   /* Hero / Footer */
    --charcoal:     #1A1A1A;   /* Seções escuras */
    --graphite:     #2E2E2E;   /* Bordas / dividers */
    --smoke:        #6B6B6B;   /* Texto secundário */
    --silver:       #AAAAAA;   /* Labels / captions */
    --mist:         #E8E6E1;   /* Bordas claras */
    --ivory:        #F5F3EE;   /* Fundo principal */
    --white:        #FAFAF8;   /* Cards / superfícies */

    /* Marca — dourado */
    --gold-deep:    #8A6A28;   /* Hover states */
    --gold:         #B48C3C;   /* CTA / acento principal */
    --gold-light:   #D4AA5A;   /* Destaques / icons */
    --gold-mist:    #F0E8D5;   /* Fundos de cards / badges */

    /* Aliases semânticos */
    --ink:          var(--obsidian);
    --ink-2:        var(--charcoal);
    --ink-3:        var(--graphite);
    --canvas:       var(--ivory);
    --canvas-2:     var(--mist);
    --paper:        var(--white);
    --line:         var(--mist);
    --line-dark:    var(--graphite);

    --text:         var(--obsidian);
    --text-muted:   var(--smoke);
    --text-on-dark: var(--white);
    --text-on-dark-muted: var(--silver);

    --accent:       var(--gold);
    --accent-soft:  var(--gold-deep);
    --accent-light: var(--gold-light);
    --accent-glow:  rgba(180, 140, 60, 0.14);

    /* Tipografia */
    --font-display: "Cormorant Garamond", "Times New Roman", Georgia, serif;
    --font-sans:    "DM Sans", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;

    /* Layout */
    --container:    1200px;
    --container-narrow: 920px;
    --radius-sm:    6px;
    --radius:       10px;
    --radius-lg:    16px;

    /* Transições */
    --ease:         cubic-bezier(0.4, 0, 0.2, 1);
}

/* Reset */
*, *::before, *::after { box-sizing: border-box; }
* { margin: 0; }
html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }
body {
    font-family: var(--font-sans);
    font-size: 17px;
    font-weight: 400;
    line-height: 1.65;
    color: var(--text);
    background: var(--ivory);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    text-rendering: optimizeLegibility;
}

img, svg { display: block; max-width: 100%; height: auto; }
a { color: inherit; text-decoration: none; }
button { font: inherit; cursor: pointer; border: none; background: none; }

/* Container */
.container {
    max-width: var(--container);
    margin: 0 auto;
    padding: 0 32px;
}
.container--narrow { max-width: var(--container-narrow); }

/* Tipografia */
.eyebrow {
    font-size: 12px;
    font-weight: 600;
    letter-spacing: 0.18em;
    text-transform: uppercase;
    color: var(--accent);
}
.eyebrow--muted { color: var(--text-muted); }
.eyebrow--ondark { color: var(--accent); }

h1, h2, h3, h4 {
    font-family: var(--font-display);
    font-weight: 300;
    letter-spacing: -0.015em;
    line-height: 1.1;
    color: var(--ink);
}

h1 { font-size: clamp(44px, 6.4vw, 76px); font-weight: 300; }
h2 { font-size: clamp(34px, 4.2vw, 52px); }
h3 { font-size: 26px; font-weight: 400; line-height: 1.22; letter-spacing: -0.01em; }

.dark-section h1, .dark-section h2, .dark-section h3 { color: var(--text-on-dark); }

/* ============================================================
   Header
   ============================================================ */
.header {
    position: sticky;
    top: 0;
    z-index: 100;
    background: rgba(245, 243, 238, 0.88);
    backdrop-filter: saturate(160%) blur(14px);
    -webkit-backdrop-filter: saturate(160%) blur(14px);
    border-bottom: 1px solid var(--mist);
}
.header__inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 76px;
}
.brand {
    font-family: var(--font-sans);
    font-size: 24px;
    font-weight: 500;
    letter-spacing: -0.02em;
    color: var(--ink);
    display: inline-flex;
    align-items: baseline;
}
.brand__i {
    color: var(--gold);
    font-weight: 500;
}
.footer .brand { color: var(--text-on-dark); }
.nav { display: flex; align-items: center; gap: 36px; }
.nav__list {
    display: flex;
    list-style: none;
    padding: 0;
    gap: 28px;
}
.nav__link {
    font-size: 14px;
    font-weight: 500;
    color: var(--text);
    transition: color 200ms var(--ease);
    position: relative;
}
.nav__link::after {
    content: "";
    position: absolute;
    left: 0; right: 0; bottom: -6px;
    height: 1px;
    background: var(--accent);
    transform: scaleX(0);
    transform-origin: left;
    transition: transform 250ms var(--ease);
}
.nav__link:hover { color: var(--ink); }
.nav__link:hover::after { transform: scaleX(1); }

/* Botão */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    padding: 14px 24px;
    font-size: 14px;
    font-weight: 600;
    letter-spacing: 0.01em;
    border-radius: 999px;
    transition: all 220ms var(--ease);
    border: 1px solid transparent;
    white-space: nowrap;
}
.btn--primary {
    background: var(--gold);
    color: var(--white);
    letter-spacing: 0.06em;
    text-transform: uppercase;
    font-size: 12px;
}
.btn--primary:hover {
    background: var(--gold-deep);
    transform: translateY(-1px);
}
.btn--ghost {
    background: transparent;
    color: var(--ink);
    border-color: var(--ink);
}
.btn--ghost:hover { background: var(--ink); color: var(--canvas); }
.btn--accent {
    background: var(--gold);
    color: var(--white);
    letter-spacing: 0.06em;
    text-transform: uppercase;
    font-size: 12px;
}
.btn--accent:hover { background: var(--gold-deep); transform: translateY(-1px); }
.btn--ondark {
    background: var(--canvas);
    color: var(--ink);
}
.btn--ondark:hover { background: var(--paper); transform: translateY(-1px); }
.btn--ghost-ondark {
    color: var(--text-on-dark);
    border-color: var(--silver);
    letter-spacing: 0.06em;
    text-transform: uppercase;
    font-size: 12px;
}
.btn--ghost-ondark:hover { background: var(--charcoal); border-color: var(--gold); color: var(--gold-light); }
.btn .arrow { transition: transform 220ms var(--ease); }
.btn:hover .arrow { transform: translateX(3px); }

.btn--sm { padding: 10px 18px; font-size: 13px; }

/* ============================================================
   Hero
   ============================================================ */
.hero {
    position: relative;
    background: var(--obsidian);
    color: var(--text-on-dark);
    overflow: hidden;
    padding: 140px 0 120px;
}
.hero::before {
    content: "";
    position: absolute;
    inset: 0;
    background:
        radial-gradient(ellipse at 85% 0%, rgba(180, 140, 60, 0.10), transparent 55%),
        radial-gradient(ellipse at 0% 100%, rgba(46, 46, 46, 0.6), transparent 55%);
    pointer-events: none;
}
.hero__grid {
    position: relative;
    display: grid;
    grid-template-columns: 1fr;
    gap: 56px;
    align-items: end;
}
.hero__title {
    color: var(--text-on-dark);
    margin: 24px 0 28px;
    max-width: 18ch;
}
.hero__title em {
    font-style: italic;
    color: var(--gold-light);
    font-weight: 300;
}
.hero__lead {
    font-size: 19px;
    line-height: 1.55;
    color: var(--text-on-dark-muted);
    max-width: 56ch;
    margin-bottom: 40px;
}
.hero__actions { display: flex; gap: 14px; flex-wrap: wrap; }

.hero__meta {
    border-top: 1px solid var(--line-dark);
    margin-top: 80px;
    padding-top: 32px;
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 28px;
}
.hero__meta-item .num {
    font-family: var(--font-display);
    font-size: 36px;
    font-weight: 350;
    color: var(--accent);
    line-height: 1;
    display: block;
    margin-bottom: 8px;
}
.hero__meta-item .lbl {
    font-size: 13px;
    color: var(--text-on-dark-muted);
    line-height: 1.4;
}

/* ============================================================
   Sections
   ============================================================ */
.section { padding: 120px 0; }
.section--tight { padding: 80px 0; }
.section--dark {
    background: var(--charcoal);
    color: var(--text-on-dark);
}
.section--dark .section__lead { color: var(--text-on-dark-muted); }
.section--canvas-2 { background: var(--mist); }

.section__head {
    max-width: 720px;
    margin-bottom: 64px;
}
.section__head--center {
    margin-left: auto;
    margin-right: auto;
    text-align: center;
}
.section__title { margin: 16px 0 20px; }
.section__lead {
    font-size: 19px;
    color: var(--text-muted);
    line-height: 1.55;
}

/* Manifesto */
.manifesto {
    font-family: var(--font-display);
    font-size: clamp(26px, 3vw, 36px);
    font-weight: 350;
    line-height: 1.3;
    letter-spacing: -0.015em;
    color: var(--ink);
    max-width: 36ch;
}
.manifesto strong {
    font-weight: 450;
    color: var(--ink);
    background: linear-gradient(transparent 65%, var(--accent-glow) 65%);
}
.manifesto-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 80px;
    align-items: start;
}
.manifesto-grid__aside {
    border-left: 1px solid var(--line);
    padding-left: 40px;
}
.manifesto-grid__aside p {
    color: var(--text-muted);
    margin-bottom: 16px;
    font-size: 16px;
    line-height: 1.65;
}
.manifesto-grid__aside p:last-child { margin-bottom: 0; }

/* ============================================================
   Portfolio (MBAs)
   ============================================================ */
.programs {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 0;
    border-top: 1px solid var(--line-dark);
    border-left: 1px solid var(--line-dark);
}
.program {
    position: relative;
    padding: 48px 40px;
    border-right: 1px solid var(--graphite);
    border-bottom: 1px solid var(--graphite);
    transition: background 250ms var(--ease);
    display: flex;
    flex-direction: column;
    gap: 18px;
    min-height: 280px;
}
.program:hover { background: var(--obsidian); }
.program__num {
    font-family: var(--font-display);
    font-size: 14px;
    color: var(--accent);
    font-weight: 400;
}
.program__title {
    color: var(--text-on-dark);
    font-size: 26px;
    line-height: 1.2;
    font-weight: 400;
}
.program__title em { font-style: italic; color: var(--gold-light); font-weight: 300; }
.program__desc {
    color: var(--text-on-dark-muted);
    font-size: 15px;
    line-height: 1.55;
    flex-grow: 1;
}
.program__cta {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    font-size: 13px;
    font-weight: 600;
    letter-spacing: 0.04em;
    text-transform: uppercase;
    color: var(--accent);
    margin-top: auto;
    transition: gap 200ms var(--ease);
}
.program:hover .program__cta { gap: 14px; }
.program__cta-tag {
    position: absolute;
    top: 28px;
    right: 28px;
    font-size: 10px;
    letter-spacing: 0.14em;
    text-transform: uppercase;
    color: var(--gold-deep);
    background: var(--gold-mist);
    font-weight: 600;
    padding: 5px 10px;
    border-radius: 4px;
    line-height: 1;
}

/* ============================================================
   Approach (Strategy x Leadership)
   ============================================================ */
.approach-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 24px;
    margin-top: 56px;
}
.approach-card {
    background: var(--white);
    border: 1px solid var(--mist);
    border-radius: var(--radius-lg);
    padding: 48px 40px;
    position: relative;
    overflow: hidden;
    transition: border-color 220ms var(--ease), transform 220ms var(--ease);
}
.approach-card:hover { border-color: var(--gold-light); transform: translateY(-2px); }
.approach-card::before {
    content: "";
    position: absolute;
    top: 0; left: 0;
    width: 56px; height: 3px;
    background: var(--gold);
}
.approach-card__label {
    font-size: 12px;
    letter-spacing: 0.18em;
    text-transform: uppercase;
    color: var(--accent);
    font-weight: 600;
    margin-bottom: 16px;
}
.approach-card__title {
    font-size: 28px;
    margin-bottom: 16px;
}
.approach-card__desc {
    color: var(--text-muted);
    line-height: 1.6;
    font-size: 16px;
}

/* ============================================================
   Differentials
   ============================================================ */
.diff-list {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 32px;
    margin-top: 56px;
}
.diff {
    border-top: 1px solid var(--graphite);
    padding-top: 28px;
}
.diff__num {
    font-family: var(--font-display);
    font-size: 32px;
    color: var(--accent);
    font-weight: 350;
    margin-bottom: 16px;
    display: block;
}
.diff__title {
    font-size: 18px;
    color: var(--text-on-dark);
    font-family: var(--font-sans);
    font-weight: 600;
    letter-spacing: -0.005em;
    margin-bottom: 10px;
}
.diff__desc {
    color: var(--text-on-dark-muted);
    font-size: 15px;
    line-height: 1.6;
}

/* ============================================================
   FAQ
   ============================================================ */
.faq { max-width: 820px; margin: 0 auto; }
.faq-item {
    border-bottom: 1px solid var(--mist);
    padding: 24px 0;
}
.faq-item summary {
    font-family: var(--font-display);
    font-size: 24px;
    font-weight: 400;
    color: var(--ink);
    cursor: pointer;
    list-style: none;
    display: flex;
    justify-content: space-between;
    gap: 24px;
    align-items: center;
    line-height: 1.3;
    letter-spacing: -0.005em;
}
.faq-item summary::-webkit-details-marker { display: none; }
.faq-item summary::after {
    content: "+";
    font-family: var(--font-sans);
    font-size: 22px;
    font-weight: 300;
    color: var(--accent);
    transition: transform 220ms var(--ease);
    flex-shrink: 0;
}
.faq-item[open] summary::after { transform: rotate(45deg); }
.faq-item__body {
    color: var(--text-muted);
    line-height: 1.65;
    margin-top: 16px;
    max-width: 70ch;
    font-size: 16px;
}

/* ============================================================
   CTA Final
   ============================================================ */
.cta-final {
    text-align: center;
    padding: 120px 0;
    background:
        radial-gradient(ellipse at 50% 100%, rgba(180, 140, 60, 0.16), transparent 55%),
        var(--obsidian);
    color: var(--text-on-dark);
}
.cta-final h2 { color: var(--text-on-dark); margin-bottom: 24px; max-width: 22ch; margin-left: auto; margin-right: auto; }
.cta-final h2 em { color: var(--gold-light); font-style: italic; font-weight: 300; }
.cta-final p {
    color: var(--text-on-dark-muted);
    font-size: 18px;
    max-width: 56ch;
    margin: 0 auto 40px;
    line-height: 1.55;
}

/* ============================================================
   Footer
   ============================================================ */
.footer {
    background: var(--obsidian);
    color: var(--text-on-dark-muted);
    padding: 80px 0 40px;
    border-top: 1px solid var(--graphite);
}
.footer__grid {
    display: grid;
    grid-template-columns: 1.4fr 1fr 1fr 1fr;
    gap: 40px;
    padding-bottom: 56px;
    border-bottom: 1px solid var(--graphite);
    margin-bottom: 32px;
}
.footer .brand { color: var(--text-on-dark); margin-bottom: 16px; }
.footer__about {
    font-size: 14px;
    line-height: 1.6;
    max-width: 38ch;
}
.footer__col h4 {
    font-family: var(--font-sans);
    font-size: 12px;
    letter-spacing: 0.16em;
    text-transform: uppercase;
    color: var(--accent);
    font-weight: 600;
    margin-bottom: 18px;
}
.footer__col ul { list-style: none; padding: 0; display: grid; gap: 10px; }
.footer__col a {
    font-size: 14px;
    color: var(--text-on-dark-muted);
    transition: color 180ms var(--ease);
}
.footer__col a:hover { color: var(--accent); }
.footer__bottom {
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 13px;
    color: var(--text-on-dark-muted);
}
.footer__bottom a:hover { color: var(--accent); }

/* ============================================================
   Responsivo
   ============================================================ */
@media (max-width: 900px) {
    .container { padding: 0 24px; }
    .section { padding: 80px 0; }
    .hero { padding: 100px 0 80px; }
    .hero__meta { grid-template-columns: repeat(2, 1fr); gap: 24px; }
    .manifesto-grid { grid-template-columns: 1fr; gap: 40px; }
    .manifesto-grid__aside { border-left: none; border-top: 1px solid var(--line); padding-left: 0; padding-top: 32px; }
    .programs { grid-template-columns: 1fr; }
    .approach-grid { grid-template-columns: 1fr; }
    .diff-list { grid-template-columns: 1fr; gap: 0; }
    .diff { padding: 28px 0; }
    .footer__grid { grid-template-columns: 1fr 1fr; }
    .footer__bottom { flex-direction: column; gap: 12px; text-align: center; }
    .nav__list { display: none; }
}

@media (max-width: 540px) {
    h1 { font-size: 38px; }
    h2 { font-size: 30px; }
    .hero__meta { grid-template-columns: 1fr 1fr; }
    .program { padding: 36px 28px; min-height: auto; }
    .program__cta-tag { display: none; }
    .approach-card { padding: 36px 28px; }
    .footer__grid { grid-template-columns: 1fr; }
}

/* ============================================================
   Reveal animation
   ============================================================ */
.reveal {
    opacity: 0;
    transform: translateY(20px);
    transition: opacity 700ms var(--ease), transform 700ms var(--ease);
}
.reveal.is-visible {
    opacity: 1;
    transform: translateY(0);
}
@media (prefers-reduced-motion: reduce) {
    .reveal { opacity: 1; transform: none; }
    * { animation: none !important; transition: none !important; }
}