/* ==========================================================================
   SYNAP — Inteligência que conecta
   Tema: preto puro + dourado #D4AF37 + ciano #00BFFF
   ========================================================================== */

/* -------- Design Tokens -------- */
:root {
    /* Background — preto puro conforme imagem */
    --bg:           #000000;
    --bg-soft:      #050507;
    --bg-elevated:  #0a0a0d;
    --bg-card:      rgba(255, 255, 255, 0.02);
    --bg-card-hover:rgba(255, 255, 255, 0.04);

    --border:       rgba(255, 255, 255, 0.08);
    --border-strong:rgba(255, 255, 255, 0.16);
    --border-gold:  rgba(212, 175, 55, 0.4);

    --text:         #ffffff;
    --text-muted:   #a0a0a8;
    --text-dim:     #6a6a72;

    /* Acentos exatos da imagem */
    --gold:         #D4AF37;
    --gold-soft:    #e8c766;
    --gold-dim:     rgba(212, 175, 55, 0.15);
    --cyan:         #00BFFF;
    --cyan-soft:    #4ad3ff;
    --cyan-dim:     rgba(0, 191, 255, 0.15);

    --gradient-gold: linear-gradient(135deg, #D4AF37 0%, #f0d57a 100%);
    --gradient-cyan: linear-gradient(135deg, #00BFFF 0%, #5dd6ff 100%);
    --gradient-mix:  linear-gradient(135deg, #D4AF37 0%, #00BFFF 100%);

    --font-sans:    'Inter', system-ui, -apple-system, sans-serif;
    --font-display: 'Space Grotesk', 'Inter', sans-serif;

    --radius:       12px;
    --radius-lg:    20px;
    --radius-pill:  999px;

    --container:    1280px;
    --ease:         cubic-bezier(0.22, 1, 0.36, 1);
}

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

html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }

body {
    font-family: var(--font-sans);
    background: var(--bg);
    color: var(--text);
    line-height: 1.6;
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

a { color: inherit; text-decoration: none; }
ul { list-style: none; }
img { max-width: 100%; display: block; }
button { font-family: inherit; cursor: pointer; border: none; background: none; color: inherit; }
input, textarea, select { font-family: inherit; }

/* -------- Layout helpers -------- */
.container {
    width: 100%;
    max-width: var(--container);
    margin: 0 auto;
    padding: 0 32px;
}

.section { position: relative; padding: 140px 0; }

.section-head { margin-bottom: 72px; }
.section-head--center { text-align: center; max-width: 720px; margin-left: auto; margin-right: auto; }

.section-tag {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    font-family: var(--font-display);
    font-size: 0.78rem;
    font-weight: 600;
    letter-spacing: 2.5px;
    color: var(--gold);
    margin-bottom: 20px;
    text-transform: uppercase;
}

.section-title {
    font-family: var(--font-display);
    font-size: clamp(2.2rem, 5vw, 3.6rem);
    font-weight: 700;
    line-height: 1.08;
    letter-spacing: -0.02em;
}

.section-desc {
    margin-top: 20px;
    font-size: 1.05rem;
    color: var(--text-muted);
    max-width: 600px;
}
.section-head--center .section-desc { margin-left: auto; margin-right: auto; }

.text-gold {
    color: var(--gold);
}

.lead { font-size: 1.25rem; color: var(--text); margin-bottom: 20px; line-height: 1.5; }

/* -------- Buttons -------- */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
    padding: 15px 30px;
    font-family: var(--font-sans);
    font-size: 0.92rem;
    font-weight: 600;
    letter-spacing: 0.2px;
    border-radius: var(--radius-pill);
    transition: all 0.3s var(--ease);
    cursor: pointer;
    white-space: nowrap;
}
.btn--primary {
    background: var(--gold);
    color: #000000;
    box-shadow: 0 8px 28px -8px rgba(212, 175, 55, 0.5);
}
.btn--primary:hover {
    background: var(--gold-soft);
    transform: translateY(-2px);
    box-shadow: 0 14px 36px -8px rgba(212, 175, 55, 0.6);
}
.btn--ghost {
    background: transparent;
    color: var(--text);
    border: 1px solid var(--border-strong);
}
.btn--ghost:hover { border-color: var(--gold); color: var(--gold); }
.btn--small { padding: 11px 22px; font-size: 0.85rem; }
.btn--block { width: 100%; }

/* -------- Header / Navbar -------- */
.header {
    position: fixed;
    top: 0; left: 0; right: 0;
    z-index: 100;
    padding: 22px 0;
    transition: all 0.3s var(--ease);
}
.header.scrolled {
    background: rgba(0, 0, 0, 0.85);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--border);
    padding: 14px 0;
}
.header__container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 32px;
}

.logo {
    display: inline-flex;
    align-items: center;
    gap: 12px;
    color: var(--text);
}
.logo__mark { color: var(--gold); display: flex; }
.logo__text {
    font-family: var(--font-display);
    font-weight: 700;
    font-size: 1.3rem;
    letter-spacing: 2px;
}

.nav__list { display: flex; gap: 36px; }
.nav__link {
    font-size: 0.92rem;
    font-weight: 500;
    color: var(--text-muted);
    position: relative;
    padding: 6px 0;
    transition: color 0.3s;
}
.nav__link::after {
    content: '';
    position: absolute;
    bottom: 0; left: 0;
    width: 0; height: 1px;
    background: var(--gold);
    transition: width 0.3s var(--ease);
}
.nav__link:hover, .nav__link.active { color: var(--text); }
.nav__link:hover::after, .nav__link.active::after { width: 100%; }

.menu-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    padding: 8px;
    z-index: 101;
}
.menu-toggle span {
    width: 26px; height: 2px;
    background: var(--text);
    transition: all 0.3s var(--ease);
    border-radius: 2px;
}
.menu-toggle.active span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.menu-toggle.active span:nth-child(2) { opacity: 0; }
.menu-toggle.active span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* -------- Hero -------- */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    padding-top: 120px;
    overflow: hidden;
}
.hero__bg { position: absolute; inset: 0; z-index: 0; }
#neuralCanvas {
    position: absolute;
    inset: 0;
    width: 100%;
    height: 100%;
    opacity: 0.55;
}
.hero__inner { position: relative; z-index: 1; }
.hero__inner .section-tag { display: block; margin-bottom: 28px; }
.hero__title {
    font-family: var(--font-display);
    font-size: clamp(3rem, 9vw, 7rem);
    font-weight: 700;
    line-height: 0.98;
    letter-spacing: -0.03em;
    margin-bottom: 32px;
}
.hero__subtitle {
    font-size: clamp(1.05rem, 1.5vw, 1.3rem);
    color: var(--text-muted);
    max-width: 560px;
    margin-bottom: 44px;
    line-height: 1.6;
}
.hero__actions { display: flex; flex-wrap: wrap; gap: 16px; }

.scroll-cue {
    position: absolute;
    bottom: 32px; left: 50%;
    transform: translateX(-50%);
    width: 26px; height: 42px;
    border: 1px solid var(--border-strong);
    border-radius: 14px;
    display: flex;
    justify-content: center;
    padding-top: 8px;
    z-index: 2;
}
.scroll-cue span {
    width: 3px; height: 8px;
    background: var(--gold);
    border-radius: 2px;
    animation: scrollcue 1.8s infinite;
}
@keyframes scrollcue {
    0% { transform: translateY(0); opacity: 1; }
    100% { transform: translateY(12px); opacity: 0; }
}

/* -------- About -------- */
.about__grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 80px;
    align-items: center;
}
.about__text p { color: var(--text-muted); margin-bottom: 20px; }
.about__text .lead { color: var(--text); }
.about__cards { display: flex; flex-direction: column; gap: 20px; }

.feature-card {
    display: flex;
    align-items: flex-start;
    gap: 20px;
    padding: 28px;
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    transition: all 0.4s var(--ease);
}
.feature-card:hover {
    transform: translateX(6px);
    border-color: var(--border-gold);
    background: var(--bg-card-hover);
}
.feature-card__icon {
    width: 50px; height: 50px;
    border-radius: 12px;
    background: var(--gold-dim);
    border: 1px solid var(--border-gold);
    color: var(--gold);
    display: flex; align-items: center; justify-content: center;
    flex-shrink: 0;
}
.feature-card h3 {
    font-family: var(--font-display);
    font-size: 1.15rem;
    margin-bottom: 6px;
}
.feature-card p { color: var(--text-muted); font-size: 0.95rem; margin: 0; }

/* -------- Solutions -------- */
.solutions__grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 24px;
}
.solution-card {
    position: relative;
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: 40px 36px;
    transition: all 0.4s var(--ease);
    overflow: hidden;
}
.solution-card::before {
    content: '';
    position: absolute;
    top: 0; left: 0; right: 0;
    height: 2px;
    background: var(--gradient-gold);
    transform: scaleX(0);
    transform-origin: left;
    transition: transform 0.5s var(--ease);
}
.solution-card:hover {
    transform: translateY(-6px);
    border-color: var(--border-strong);
    background: var(--bg-card-hover);
}
.solution-card:hover::before { transform: scaleX(1); }
.solution-card__num {
    position: absolute;
    top: 32px; right: 36px;
    font-family: var(--font-display);
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--gold);
    letter-spacing: 1px;
    opacity: 0.6;
}
.solution-card__icon {
    width: 60px; height: 60px;
    border-radius: 14px;
    background: var(--gold-dim);
    border: 1px solid var(--border-gold);
    color: var(--gold);
    display: flex; align-items: center; justify-content: center;
    margin-bottom: 24px;
    transition: transform 0.4s var(--ease);
}
.solution-card:hover .solution-card__icon { transform: scale(1.08); }
.solution-card h3 {
    font-family: var(--font-display);
    font-size: 1.35rem;
    margin-bottom: 12px;
}
.solution-card > p { color: var(--text-muted); margin-bottom: 22px; font-size: 0.98rem; }
.solution-card__list {
    border-top: 1px solid var(--border);
    padding-top: 18px;
}
.solution-card__list li {
    padding: 7px 0;
    font-size: 0.9rem;
    color: var(--text-muted);
    display: flex;
    align-items: center;
    gap: 10px;
}
.solution-card__list li::before {
    content: '';
    width: 5px; height: 5px;
    border-radius: 50%;
    background: var(--gold);
}

/* -------- Methodology -------- */
.methodology { background: var(--bg-soft); }
.method__timeline {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 24px;
}
.method-step {
    display: flex;
    gap: 28px;
    padding: 36px;
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    transition: all 0.4s var(--ease);
}
.method-step:hover {
    border-color: var(--border-gold);
    transform: translateY(-4px);
}
.method-step__num {
    font-family: var(--font-display);
    font-size: 2.6rem;
    font-weight: 700;
    line-height: 1;
    color: var(--gold);
    flex-shrink: 0;
}
.method-step__body h3 {
    font-family: var(--font-display);
    font-size: 1.25rem;
    margin-bottom: 10px;
}
.method-step__body p { color: var(--text-muted); font-size: 0.96rem; }

/* -------- Contact -------- */
.contact__grid {
    display: grid;
    grid-template-columns: 0.85fr 1.15fr;
    gap: 60px;
    align-items: start;
}
.contact__channels { display: flex; flex-direction: column; gap: 24px; }
.contact__channels li {
    display: flex;
    align-items: center;
    gap: 18px;
}
.contact__channels-icon {
    width: 50px; height: 50px;
    border-radius: 12px;
    background: var(--gold-dim);
    border: 1px solid var(--border-gold);
    color: var(--gold);
    display: flex; align-items: center; justify-content: center;
    flex-shrink: 0;
}
.contact__channels small {
    display: block;
    font-size: 0.72rem;
    color: var(--text-dim);
    letter-spacing: 1.5px;
    text-transform: uppercase;
    margin-bottom: 2px;
}
.contact__channels a, .contact__channels span {
    font-family: var(--font-display);
    font-size: 1.05rem;
    color: var(--text);
    transition: color 0.3s;
}
.contact__channels a:hover { color: var(--gold); }

.contact__form {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: 44px;
}
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; }
.form-group { margin-bottom: 20px; }
.form-group label {
    display: block;
    font-size: 0.82rem;
    font-weight: 500;
    color: var(--text-muted);
    margin-bottom: 8px;
}
.form-group input,
.form-group select,
.form-group textarea {
    width: 100%;
    padding: 14px 16px;
    background: rgba(0,0,0,0.4);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    color: var(--text);
    font-size: 0.95rem;
    transition: all 0.3s var(--ease);
}
.form-group input::placeholder,
.form-group textarea::placeholder { color: var(--text-dim); }
.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--gold);
    background: rgba(0,0,0,0.6);
    box-shadow: 0 0 0 3px rgba(212, 175, 55, 0.12);
}
.form-group textarea { resize: vertical; min-height: 120px; }
.form-group select { cursor: pointer; }
.form-group select option { background: var(--bg-elevated); }
.form-group input.invalid, .form-group textarea.invalid { border-color: #ff5b5b; }

.form-feedback {
    margin-top: 16px;
    font-size: 0.9rem;
    text-align: center;
    min-height: 22px;
    opacity: 0;
    transition: opacity 0.3s;
}
.form-feedback.show { opacity: 1; }
.form-feedback.success { color: var(--cyan); }
.form-feedback.error { color: #ff5b5b; }

/* -------- Footer -------- */
.footer {
    background: var(--bg-soft);
    border-top: 1px solid var(--border);
    padding-top: 80px;
}
.footer__container {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1fr;
    gap: 48px;
    padding-bottom: 60px;
}
.footer__brand p { color: var(--text-muted); margin: 20px 0 24px; max-width: 320px; font-size: 0.95rem; }
.footer__social { display: flex; gap: 12px; }
.footer__social a {
    width: 40px; height: 40px;
    border-radius: 10px;
    background: var(--bg-card);
    border: 1px solid var(--border);
    color: var(--text-muted);
    display: flex; align-items: center; justify-content: center;
    transition: all 0.3s var(--ease);
}
.footer__social a:hover { color: var(--gold); border-color: var(--gold); transform: translateY(-3px); }
.footer__col h4 {
    font-family: var(--font-display);
    font-size: 0.85rem;
    letter-spacing: 1.5px;
    text-transform: uppercase;
    color: var(--text);
    margin-bottom: 22px;
}
.footer__col ul { display: flex; flex-direction: column; gap: 12px; }
.footer__col a, .footer__col li { color: var(--text-muted); font-size: 0.94rem; transition: color 0.3s; }
.footer__col a:hover { color: var(--gold); }

.footer__bottom {
    border-top: 1px solid var(--border);
    padding: 26px 0;
}
.footer__bottom-inner {
    display: flex;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: 12px;
    color: var(--text-dim);
    font-size: 0.86rem;
}

/* -------- Back to top -------- */
.back-to-top {
    position: fixed;
    bottom: 32px; right: 32px;
    width: 48px; height: 48px;
    background: var(--gold);
    color: #000;
    border-radius: 50%;
    display: flex; align-items: center; justify-content: center;
    opacity: 0;
    visibility: hidden;
    transform: translateY(20px);
    transition: all 0.4s var(--ease);
    z-index: 90;
    box-shadow: 0 10px 30px -8px rgba(212, 175, 55, 0.5);
}
.back-to-top.show { opacity: 1; visibility: visible; transform: translateY(0); }
.back-to-top:hover { transform: translateY(-4px); }

/* -------- Reveal animations -------- */
.reveal {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.8s var(--ease), transform 0.8s var(--ease);
}
.reveal.visible { opacity: 1; transform: translateY(0); }

/* ==========================================================================
   RESPONSIVE
   ========================================================================== */
@media (max-width: 1024px) {
    .section { padding: 100px 0; }
    .about__grid { grid-template-columns: 1fr; gap: 48px; }
    .contact__grid { grid-template-columns: 1fr; gap: 40px; }
    .footer__container { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 768px) {
    .section { padding: 80px 0; }
    .container { padding: 0 20px; }

    /* Mobile nav */
    .menu-toggle { display: flex; }
    .nav {
        position: fixed;
        top: 0; right: -100%;
        width: 80%; max-width: 340px;
        height: 100vh;
        background: var(--bg-elevated);
        border-left: 1px solid var(--border);
        padding: 100px 36px 40px;
        transition: right 0.4s var(--ease);
        z-index: 99;
    }
    .nav.open { right: 0; }
    .nav__list { flex-direction: column; gap: 0; }
    .nav__link {
        display: block;
        padding: 18px 0;
        font-size: 1.05rem;
        border-bottom: 1px solid var(--border);
    }
    .header .btn--small { display: none; }

    .hero { padding-top: 110px; min-height: auto; padding-bottom: 90px; }
    .hero__actions { flex-direction: column; align-items: stretch; }
    .hero__actions .btn { justify-content: center; }

    .section-head { margin-bottom: 44px; }
    .solutions__grid { grid-template-columns: 1fr; }
    .method__timeline { grid-template-columns: 1fr; }
    .method-step { padding: 28px; gap: 20px; }

    .contact__form { padding: 28px 22px; }
    .form-row { grid-template-columns: 1fr; gap: 0; }

    .footer__container { grid-template-columns: 1fr; gap: 36px; }
    .footer__bottom-inner { justify-content: center; text-align: center; }

    .back-to-top { bottom: 20px; right: 20px; width: 42px; height: 42px; }
}

/* -------- Reduced motion -------- */
@media (prefers-reduced-motion: reduce) {
    *, *::before, *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
        scroll-behavior: auto !important;
    }
    .reveal { opacity: 1; transform: none; }
    #neuralCanvas { display: none; }
}