/* ============================================================
   DESIGN SYSTEM — fellipe.com.br
   ============================================================ */

:root {
  /* Palette */
  --bg:           #07071200;
  --bg-0:         #070712;
  --bg-1:         #0d0d1f;
  --bg-2:         #141428;
  --bg-glass:     rgba(255,255,255,0.04);
  --bg-glass-h:   rgba(255,255,255,0.08);
  --border:       rgba(255,255,255,0.07);
  --border-md:    rgba(255,255,255,0.13);
  --border-glow:  rgba(124,58,237,0.35);

  --violet:       #7c3aed;
  --violet-l:     #a78bfa;
  --blue:         #2563eb;
  --blue-l:       #60a5fa;
  --cyan:         #06b6d4;
  --cyan-l:       #67e8f9;
  --green:        #10b981;
  --red:          #ef4444;
  --amber:        #f59e0b;

  --grad:         linear-gradient(135deg, #7c3aed, #2563eb);
  --grad-text:    linear-gradient(135deg, #a78bfa, #60a5fa, #22d3ee);
  --grad-glow:    linear-gradient(135deg, rgba(124,58,237,.18), rgba(37,99,235,.18));

  --txt:          #f1f5f9;
  --txt-2:        #94a3b8;
  --txt-3:        #475569;

  /* Typography */
  --font:         'Inter', system-ui, -apple-system, sans-serif;
  --mono:         'Fira Code', 'Cascadia Code', monospace;

  /* Spacing */
  --sp-1: .25rem; --sp-2: .5rem;  --sp-3: .75rem; --sp-4: 1rem;
  --sp-5: 1.25rem; --sp-6: 1.5rem; --sp-8: 2rem;  --sp-10: 2.5rem;
  --sp-12: 3rem;  --sp-16: 4rem;  --sp-20: 5rem;  --sp-24: 6rem;

  /* Radii */
  --r-sm: 6px; --r-md: 12px; --r-lg: 20px; --r-xl: 28px; --r-full: 9999px;

  /* Shadows */
  --sh-sm:    0 2px 8px rgba(0,0,0,.35);
  --sh-md:    0 4px 24px rgba(0,0,0,.45);
  --sh-glow:  0 0 40px rgba(124,58,237,.22);
  --sh-glow-s:0 0 18px rgba(124,58,237,.14);

  /* Transitions */
  --ease: 250ms ease;
  --ease-s: 400ms cubic-bezier(.4,0,.2,1);

  --nav-h: 70px;
  --max-w: 1160px;
}

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

html {
  scroll-behavior: smooth;
  scroll-padding-top: var(--nav-h);
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: var(--font);
  font-size: 1rem;
  line-height: 1.65;
  color: var(--txt);
  background: var(--bg-0);
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}

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

::-webkit-scrollbar { width: 5px; }
::-webkit-scrollbar-track { background: var(--bg-0); }
::-webkit-scrollbar-thumb { background: var(--violet); border-radius: var(--r-full); }
::selection { background: rgba(124,58,237,.28); color: var(--txt); }

/* ── Layout ─────────────────────────────────── */
.container {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 0 var(--sp-6);
}

.section-pad { padding: var(--sp-24) 0; }

/* ── Section Headers ────────────────────────── */
.section-header { text-align: center; margin-bottom: var(--sp-16); }

.section-tag {
  display: inline-block;
  font-size: .7rem;
  font-weight: 700;
  letter-spacing: .16em;
  text-transform: uppercase;
  color: var(--violet-l);
  background: rgba(124,58,237,.1);
  border: 1px solid rgba(124,58,237,.22);
  padding: .3rem 1rem;
  border-radius: var(--r-full);
  margin-bottom: var(--sp-4);
}

.section-title {
  font-size: clamp(2rem, 4.5vw, 3.25rem);
  font-weight: 800;
  letter-spacing: -.025em;
  line-height: 1.1;
  margin-bottom: var(--sp-3);
}

.section-sub {
  font-size: 1.05rem;
  color: var(--txt-2);
  max-width: 560px;
  margin: 0 auto;
}

/* ── Gradient Text ──────────────────────────── */
.gradient-text {
  background: var(--grad-text);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

/* ── Buttons ────────────────────────────────── */
.btn {
  display: inline-flex;
  align-items: center;
  gap: var(--sp-2);
  padding: 13px 26px;
  border-radius: var(--r-full);
  font-size: .875rem;
  font-weight: 600;
  letter-spacing: .02em;
  transition: all var(--ease-s);
  white-space: nowrap;
  cursor: pointer;
}

.btn-primary {
  background: var(--grad);
  color: #fff;
  box-shadow: 0 4px 20px rgba(124,58,237,.3);
}
.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 32px rgba(124,58,237,.5);
  filter: brightness(1.1);
}

.btn-outline {
  background: transparent;
  color: var(--txt);
  border: 1px solid var(--border-md);
}
.btn-outline:hover {
  background: var(--bg-glass-h);
  border-color: var(--violet-l);
  transform: translateY(-2px);
  box-shadow: var(--sh-glow-s);
}

.btn-sm { padding: 9px 18px; font-size: .8rem; }
.btn-full { width: 100%; justify-content: center; }

/* ── Navbar ─────────────────────────────────── */
.navbar {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 200;
  padding: var(--sp-4) 0;
  transition: all var(--ease-s);
}

.navbar.scrolled {
  background: rgba(7,7,18,.88);
  backdrop-filter: blur(24px);
  -webkit-backdrop-filter: blur(24px);
  border-bottom: 1px solid var(--border);
  padding: var(--sp-3) 0;
  box-shadow: 0 4px 32px rgba(0,0,0,.3);
}

.nav-container {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 0 var(--sp-6);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.nav-logo {
  font-family: var(--mono);
  font-size: 1.25rem;
  font-weight: 700;
  background: var(--grad-text);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  letter-spacing: -.02em;
}
.logo-bracket { opacity: .6; }

.nav-links {
  display: flex;
  align-items: center;
  gap: var(--sp-8);
}

.nav-link {
  font-size: .875rem;
  font-weight: 500;
  color: var(--txt-2);
  transition: color var(--ease);
  position: relative;
}
.nav-link::after {
  content: '';
  position: absolute;
  bottom: -3px; left: 0;
  width: 0; height: 2px;
  background: var(--grad);
  border-radius: var(--r-full);
  transition: width var(--ease);
}
.nav-link:hover { color: var(--txt); }
.nav-link:hover::after { width: 100%; }

.nav-cta {
  background: var(--grad) !important;
  color: #fff !important;
  padding: 9px 20px;
  border-radius: var(--r-full);
  font-weight: 600;
  box-shadow: 0 4px 14px rgba(124,58,237,.25);
  transition: all var(--ease-s) !important;
}
.nav-cta::after { display: none; }
.nav-cta:hover {
  transform: translateY(-1px);
  box-shadow: 0 6px 22px rgba(124,58,237,.45) !important;
  filter: brightness(1.08);
}

.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  padding: var(--sp-2);
}
.nav-toggle span {
  display: block;
  width: 23px; height: 2px;
  background: var(--txt);
  border-radius: var(--r-full);
  transition: all var(--ease);
}

/* ── Reveal Animations ──────────────────────── */
.reveal {
  opacity: 0;
  transform: translateY(28px);
  transition: opacity .7s ease, transform .7s cubic-bezier(.4,0,.2,1);
}
.reveal.visible {
  opacity: 1;
  transform: translateY(0);
}

/* ── Footer ─────────────────────────────────── */
.footer {
  background: var(--bg-1);
  border-top: 1px solid var(--border);
  padding: var(--sp-8) 0;
}
.footer-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: var(--sp-4);
}
.footer-logo {
  font-family: var(--mono);
  font-size: 1rem;
  font-weight: 700;
  background: var(--grad-text);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
.footer-copy { font-size: .85rem; color: var(--txt-3); }
.footer-socials { display: flex; gap: var(--sp-4); }
.footer-socials a {
  color: var(--txt-3);
  font-size: 1.1rem;
  transition: color var(--ease);
}
.footer-socials a:hover { color: var(--violet-l); }

/* ── Responsive ─────────────────────────────── */
@media (max-width: 768px) {
  .section-pad { padding: var(--sp-16) 0; }

  .nav-links {
    position: fixed;
    top: var(--nav-h); left: 0; right: 0;
    background: rgba(7,7,18,.96);
    backdrop-filter: blur(20px);
    flex-direction: column;
    padding: var(--sp-8) var(--sp-6);
    gap: var(--sp-5);
    transform: translateY(-110vh);
    transition: transform var(--ease-s);
    border-bottom: 1px solid var(--border);
  }
  .nav-links.open { transform: translateY(0); }
  .nav-toggle { display: flex; }

  .footer-inner { flex-direction: column; text-align: center; }
}