/* ============================================================
   main.css — luan.estilize Portfolio
   Design system baseado em variáveis CSS + animações premium
   ============================================================ */

@import url('https://fonts.googleapis.com/css2?family=Space+Grotesk:wght@300;400;500;600;700;800&display=swap');

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

/* ── Design Tokens ─────────────────────────────────────────── */
:root {
  --bg-base:        #000000;
  --bg-card:        #0d0d0d;
  --bg-card-hover:  #111111;
  --bg-overlay:     rgba(0, 0, 0, 0.55);

  --accent-lime:    #c8ff00;
  --accent-amber:   #ff8c00;
  --accent-glow:    rgba(200, 255, 0, 0.18);
  --accent-amber-glow: rgba(255, 140, 0, 0.15);

  --text-primary:   #ffffff;
  --text-muted:     #6b7280;
  --text-dim:       #374151;

  --glass-bg:       rgba(255, 255, 255, 0.06);
  --glass-border:   rgba(255, 255, 255, 0.10);
  --glass-blur:     12px;

  --border-subtle:  rgba(255, 255, 255, 0.07);

  --font-main: 'Space Grotesk', sans-serif;

  --radius-sm:  6px;
  --radius-md:  12px;
  --radius-lg:  20px;
  --radius-xl:  28px;

  --transition-fast:   150ms ease;
  --transition-smooth: 350ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-spring: 500ms cubic-bezier(0.34, 1.56, 0.64, 1);
}

/* ── Global ────────────────────────────────────────────────── */
html {
  scroll-behavior: smooth;
}

body {
  background-color: var(--bg-base);
  color: var(--text-primary);
  font-family: var(--font-main);
  font-size: 1rem;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

/* ── Header / Nav ──────────────────────────────────────────── */
.header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1.25rem 2.5rem;
  background: rgba(0, 0, 0, 0.7);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--border-subtle);
  transition: background var(--transition-smooth);
}

.header.scrolled {
  background: rgba(0, 0, 0, 0.92);
}

.header__logo {
  display: flex;
  align-items: center;
  gap: 0.625rem;
  text-decoration: none;
}

.header__logo-img {
  height: 36px;
  width: auto;
}

.header__logo-text {
  font-size: 1rem;
  font-weight: 700;
  color: var(--text-primary);
  letter-spacing: -0.01em;
}

/* Nav */
.nav {
  display: flex;
  gap: 2.5rem;
}

.nav__link {
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--text-muted);
  text-decoration: none;
  letter-spacing: 0.01em;
  position: relative;
  transition: color var(--transition-fast);
}

.nav__link::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  width: 0;
  height: 1px;
  background: var(--accent-lime);
  transition: width var(--transition-smooth);
}

.nav__link:hover,
.nav__link.active {
  color: var(--text-primary);
}

.nav__link:hover::after,
.nav__link.active::after {
  width: 100%;
}

.nav__link.active {
  color: var(--accent-lime);
}

/* CTA Button */
.btn-cta {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  background: var(--accent-lime);
  color: #000;
  font-family: var(--font-main);
  font-size: 0.875rem;
  font-weight: 700;
  letter-spacing: 0.01em;
  padding: 0.625rem 1.375rem;
  border-radius: 100px;
  border: none;
  cursor: pointer;
  text-decoration: none;
  transition: transform var(--transition-spring), box-shadow var(--transition-smooth), background var(--transition-fast);
  box-shadow: 0 0 0 rgba(200, 255, 0, 0);
}

.btn-cta:hover {
  transform: translateY(-2px) scale(1.03);
  box-shadow: 0 0 28px var(--accent-glow), 0 0 60px rgba(200, 255, 0, 0.08);
}

.btn-cta:active {
  transform: translateY(0) scale(0.98);
}

/* ── Hero Section ──────────────────────────────────────────── */
.hero {
  padding: 160px 2.5rem 80px;
  text-align: center;
  max-width: 900px;
  margin: 0 auto;
}

.hero__label {
  display: inline-block;
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--accent-lime);
  margin-bottom: 1.5rem;
  padding: 0.35rem 1rem;
  border: 1px solid rgba(200, 255, 0, 0.25);
  border-radius: 100px;
  background: rgba(200, 255, 0, 0.05);
}

.hero__title {
  font-size: clamp(2.8rem, 7vw, 5.5rem);
  font-weight: 800;
  line-height: 1.05;
  letter-spacing: -0.04em;
  color: var(--text-primary);
  margin-bottom: 1.5rem;
}

.hero__subtitle {
  font-size: 1.125rem;
  color: var(--text-muted);
  max-width: 560px;
  margin: 0 auto;
  line-height: 1.7;
  font-weight: 400;
}

/* ── Bento Grid ────────────────────────────────────────────── */
.projects-section {
  padding: 0 2rem 6rem;
  max-width: 1280px;
  margin: 0 auto;
}

.bento-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1rem;
}

/* Wide card spans full width */
.bento-card--wide {
  grid-column: 1 / -1;
}

/* ── Project Card ──────────────────────────────────────────── */
.bento-card {
  position: relative;
  border-radius: var(--radius-xl);
  overflow: hidden;
  cursor: pointer;
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  transition: transform var(--transition-smooth), border-color var(--transition-smooth), box-shadow var(--transition-smooth);
  min-height: 420px;
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
}

.bento-card--wide {
  min-height: 480px;
}

.bento-card:hover {
  transform: translateY(-4px);
  border-color: rgba(255, 255, 255, 0.15);
  box-shadow: 0 20px 60px rgba(0,0,0,0.6), 0 0 0 1px rgba(200,255,0,0.08);
}

/* Background image */
.bento-card__bg {
  position: absolute;
  inset: 0;
  background-size: cover;
  background-position: center;
  transition: transform var(--transition-smooth), filter var(--transition-smooth);
  filter: brightness(0.55) saturate(0.9);
}

.bento-card:hover .bento-card__bg {
  transform: scale(1.03);
  filter: brightness(0.65) saturate(1.1);
}

/* Gradient overlay */
.bento-card__overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(
    to top,
    rgba(0,0,0,0.92) 0%,
    rgba(0,0,0,0.4) 50%,
    transparent 100%
  );
  pointer-events: none;
}

/* Card content area */
.bento-card__content {
  position: relative;
  z-index: 2;
  padding: 1.75rem 2rem;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

/* Brand label on top-left (for wide cards) */
.bento-card__brand {
  position: absolute;
  top: 1.5rem;
  left: 2rem;
  z-index: 2;
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  color: rgba(255,255,255,0.4);
}

.bento-card__title {
  font-size: 1.75rem;
  font-weight: 800;
  letter-spacing: -0.03em;
  line-height: 1.1;
  color: var(--text-primary);
  transition: color var(--transition-fast);
}

.bento-card--wide .bento-card__title {
  font-size: 2.5rem;
}

.bento-card:hover .bento-card__title {
  color: #ffffff;
}

.bento-card__desc {
  font-size: 0.875rem;
  color: var(--text-muted);
  line-height: 1.5;
  max-width: 400px;
  font-weight: 400;
}

/* Tags row */
.bento-card__tags {
  display: flex;
  gap: 0.5rem;
  flex-wrap: wrap;
  margin-top: 0.5rem;
  justify-content: flex-end;
}

.bento-card__row {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 1rem;
}

.tag {
  display: inline-flex;
  align-items: center;
  padding: 0.3rem 0.85rem;
  border-radius: 100px;
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.02em;
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  backdrop-filter: blur(var(--glass-blur));
  -webkit-backdrop-filter: blur(var(--glass-blur));
  color: rgba(255,255,255,0.75);
  transition: background var(--transition-fast), border-color var(--transition-fast), color var(--transition-fast);
  white-space: nowrap;
}

.bento-card:hover .tag {
  border-color: rgba(200, 255, 0, 0.25);
  color: rgba(255,255,255,0.9);
}

/* ── Archive Button ────────────────────────────────────────── */
.archive-section {
  text-align: center;
  padding: 2rem 0 5rem;
}

.btn-archive {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-family: var(--font-main);
  font-size: 0.9375rem;
  font-weight: 600;
  color: var(--text-primary);
  text-decoration: none;
  padding: 0.75rem 2rem;
  border: 1px solid var(--border-subtle);
  border-radius: 100px;
  transition: border-color var(--transition-smooth), color var(--transition-fast), transform var(--transition-spring);
}

.btn-archive:hover {
  border-color: rgba(255,255,255,0.25);
  transform: translateY(-2px);
}

.btn-archive span {
  transition: transform var(--transition-smooth);
}

.btn-archive:hover span {
  transform: translateX(4px);
}

/* ── Contact Section ───────────────────────────────────────── */
.contact-section {
  padding: 6rem 2.5rem;
  max-width: 720px;
  margin: 0 auto;
}

.section-label {
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--accent-lime);
  margin-bottom: 1rem;
}

.section-title {
  font-size: clamp(2rem, 4vw, 3.5rem);
  font-weight: 800;
  letter-spacing: -0.04em;
  line-height: 1.1;
  margin-bottom: 0.75rem;
}

.section-subtitle {
  color: var(--text-muted);
  margin-bottom: 3rem;
  font-size: 1rem;
}

/* Form */
.contact-form {
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
}

.form-group {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.form-group label {
  font-size: 0.8125rem;
  font-weight: 600;
  color: var(--text-muted);
  letter-spacing: 0.02em;
}

.form-group input,
.form-group textarea {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 0.875rem 1.125rem;
  font-family: var(--font-main);
  font-size: 0.9375rem;
  color: var(--text-primary);
  outline: none;
  transition: border-color var(--transition-smooth), box-shadow var(--transition-smooth);
  resize: none;
  width: 100%;
}

.form-group input::placeholder,
.form-group textarea::placeholder {
  color: var(--text-dim);
}

.form-group input:focus,
.form-group textarea:focus {
  border-color: rgba(200, 255, 0, 0.4);
  box-shadow: 0 0 0 3px rgba(200, 255, 0, 0.06);
}

.form-group.has-error input,
.form-group.has-error textarea {
  border-color: rgba(239, 68, 68, 0.5);
}

.form-error-text {
  font-size: 0.75rem;
  color: #ef4444;
  margin-top: 0.25rem;
}

.btn-submit {
  align-self: flex-start;
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  background: var(--accent-lime);
  color: #000;
  font-family: var(--font-main);
  font-size: 0.9375rem;
  font-weight: 700;
  padding: 0.875rem 2rem;
  border-radius: 100px;
  border: none;
  cursor: pointer;
  transition: transform var(--transition-spring), box-shadow var(--transition-smooth), opacity var(--transition-fast);
}

.btn-submit:hover {
  transform: translateY(-2px);
  box-shadow: 0 0 28px var(--accent-glow);
}

.btn-submit:disabled {
  opacity: 0.5;
  cursor: not-allowed;
  transform: none;
}

.form-status {
  padding: 0.875rem 1.25rem;
  border-radius: var(--radius-md);
  font-size: 0.9rem;
  font-weight: 500;
  display: none;
}

.form-status.success {
  display: block;
  background: rgba(200, 255, 0, 0.08);
  border: 1px solid rgba(200, 255, 0, 0.25);
  color: var(--accent-lime);
}

.form-status.error {
  display: block;
  background: rgba(239, 68, 68, 0.08);
  border: 1px solid rgba(239, 68, 68, 0.25);
  color: #f87171;
}

/* ── Footer ────────────────────────────────────────────────── */
.footer {
  padding: 3rem 2.5rem;
  border-top: 1px solid var(--border-subtle);
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 1rem;
}

.footer__brand {
  font-size: 0.9375rem;
  font-weight: 700;
  color: var(--text-primary);
  letter-spacing: -0.01em;
}

.footer__copy {
  font-size: 0.8125rem;
  color: var(--text-muted);
  flex: 1;
  text-align: center;
}

.footer__links {
  display: flex;
  gap: 1.75rem;
}

.footer__link {
  font-size: 0.8125rem;
  font-weight: 500;
  color: var(--text-muted);
  text-decoration: none;
  transition: color var(--transition-fast);
}

.footer__link:hover {
  color: var(--text-primary);
}

/* ── Loading skeleton ──────────────────────────────────────── */
.skeleton {
  background: linear-gradient(
    90deg,
    var(--bg-card) 25%,
    #1a1a1a 50%,
    var(--bg-card) 75%
  );
  background-size: 200% 100%;
  animation: shimmer 1.5s infinite;
  border-radius: var(--radius-xl);
  min-height: 420px;
}

.skeleton--wide {
  min-height: 480px;
  grid-column: 1 / -1;
}

@keyframes shimmer {
  0% { background-position: 200% 0; }
  100% { background-position: -200% 0; }
}

/* ── Page entrance animation ───────────────────────────────── */
@keyframes fadeUp {
  from {
    opacity: 0;
    transform: translateY(24px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.hero {
  animation: fadeUp 0.8s cubic-bezier(0.4, 0, 0.2, 1) both;
}

.hero__label { animation-delay: 0.05s; }
.hero__title { animation-delay: 0.1s; }
.hero__subtitle { animation-delay: 0.2s; }

/* ── Responsive ────────────────────────────────────────────── */
@media (max-width: 768px) {
  .header {
    padding: 1rem 1.25rem;
  }

  .nav {
    display: none;
  }

  .hero {
    padding: 120px 1.25rem 60px;
  }

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

  .bento-card--wide {
    grid-column: 1;
  }

  .projects-section {
    padding: 0 1.25rem 4rem;
  }

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

  .footer__copy {
    text-align: center;
  }
}

@media (max-width: 480px) {
  .bento-card__title {
    font-size: 1.4rem;
  }

  .bento-card--wide .bento-card__title {
    font-size: 1.75rem;
  }
}

/* ── Approach Grid (refactor inline styles) ─────────────────── */
.approach-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1rem;
  margin-top: 2rem;
}

@media (max-width: 768px) {
  .approach-grid {
    grid-template-columns: 1fr;
  }
}

.approach-card {
  padding: 1.75rem;
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  background: var(--bg-card);
  transition: border-color var(--transition-smooth), transform var(--transition-smooth);
}

.approach-card:hover {
  border-color: rgba(200, 255, 0, 0.15);
  transform: translateY(-3px);
}

.approach-card__num {
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  color: var(--accent-lime);
  margin-bottom: 0.75rem;
  text-transform: uppercase;
}

.approach-card__title {
  font-size: 1.125rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 0.5rem;
  letter-spacing: -0.02em;
}

.approach-card__desc {
  color: var(--text-muted);
  font-size: 0.9rem;
  line-height: 1.7;
}

/* ── About Section ──────────────────────────────────────────── */
.about-section {
  padding: 6rem 2.5rem;
  max-width: 1100px;
  margin: 0 auto;
  border-top: 1px solid var(--border-subtle);
}

.about-inner {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 5rem;
  align-items: start;
}

@media (max-width: 900px) {
  .about-inner {
    grid-template-columns: 1fr;
    gap: 3rem;
  }
}

.about-bio {
  color: var(--text-muted);
  font-size: 1rem;
  line-height: 1.8;
  margin-bottom: 1.25rem;
}

.about-cta {
  display: inline-flex;
  margin-top: 0.75rem;
}

/* Stats grid */
.about-stats {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1rem;
}

.stat-card {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: 1.75rem 1.5rem;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  transition: border-color var(--transition-smooth), transform var(--transition-smooth);
}

.stat-card:hover {
  border-color: rgba(200, 255, 0, 0.18);
  transform: translateY(-3px);
}

.stat-card__num {
  font-size: 2.5rem;
  font-weight: 800;
  letter-spacing: -0.04em;
  color: var(--accent-lime);
  line-height: 1;
}

.stat-card__label {
  font-size: 0.8125rem;
  color: var(--text-muted);
  font-weight: 500;
}

/* ── Hamburger (Mobile Nav) ─────────────────────────────────── */
.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 4px;
  margin-left: 0.75rem;
}

.nav-toggle__bar {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--text-primary);
  border-radius: 2px;
  transition: transform var(--transition-smooth), opacity var(--transition-fast), width var(--transition-smooth);
  transform-origin: left center;
}

/* Estado aberto: transforma em X */
.nav-toggle[aria-expanded="true"] .nav-toggle__bar:nth-child(1) {
  transform: rotate(45deg) translateY(-1px);
}
.nav-toggle[aria-expanded="true"] .nav-toggle__bar:nth-child(2) {
  opacity: 0;
  width: 0;
}
.nav-toggle[aria-expanded="true"] .nav-toggle__bar:nth-child(3) {
  transform: rotate(-45deg) translateY(1px);
}

@media (max-width: 768px) {
  .nav-toggle {
    display: flex;
  }

  /* CTA some no mobile para dar espaço ao hambúrguer */
  .btn-cta {
    display: none;
  }

  /* Menu mobile: dropdown da parte superior */
  .nav {
    display: none;
    position: fixed;
    top: 64px;
    left: 0;
    right: 0;
    background: rgba(0, 0, 0, 0.97);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    flex-direction: column;
    align-items: center;
    gap: 0;
    padding: 1rem 0 2rem;
    border-bottom: 1px solid var(--border-subtle);
    z-index: 99;
  }

  .nav.is-open {
    display: flex;
  }

  .nav__link {
    padding: 1rem 2rem;
    font-size: 1.125rem;
    width: 100%;
    text-align: center;
  }
}

/* ── Scroll-Reveal ──────────────────────────────────────────── */
/* Elementos com .reveal aparecem quando entram na viewport */
.reveal {
  opacity: 0;
  transform: translateY(28px);
  transition: opacity 0.65s cubic-bezier(0.4, 0, 0.2, 1),
              transform 0.65s cubic-bezier(0.4, 0, 0.2, 1);
}

.reveal.revealed {
  opacity: 1;
  transform: translateY(0);
}

/* Delay escalonado para grupos de elementos */
.reveal:nth-child(2) { transition-delay: 0.1s; }
.reveal:nth-child(3) { transition-delay: 0.2s; }
.reveal:nth-child(4) { transition-delay: 0.3s; }