/* ===================================================================
   Welisson Miranda — Portfolio
   Paleta: dark slate + acento âmbar/laranja quente
   =================================================================== */

:root {
  --bg: #0a0a0c;
  --bg-soft: #0f0f12;
  --surface: #141417;
  --surface-2: #1b1b1f;
  --border: rgba(255, 255, 255, 0.08);
  --border-strong: rgba(255, 255, 255, 0.16);

  --text: #ececf1;
  --muted: #9a9aa4;
  --faint: #6c6c76;

  --accent: #ff7a3d;
  --accent-2: #ffb84d;
  --accent-soft: rgba(255, 122, 61, 0.12);
  --accent-glow: rgba(255, 122, 61, 0.35);

  --green: #3ddc84;
  --radius: 16px;
  --radius-lg: 22px;
  --maxw: 1180px;
  --ease: cubic-bezier(0.16, 1, 0.3, 1);

  --font: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  --mono: "JetBrains Mono", "SFMono-Regular", Consolas, monospace;
}

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

html {
  scroll-behavior: smooth;
  scroll-padding-top: 90px;
}

body {
  font-family: var(--font);
  background: var(--bg);
  color: var(--text);
  line-height: 1.65;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}

::selection {
  background: var(--accent);
  color: #11100e;
}

a {
  color: inherit;
  text-decoration: none;
}

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

.container {
  width: 100%;
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 0 1.5rem;
}

/* ===== AMBIENT EFFECTS ===== */
.grain {
  position: fixed;
  inset: 0;
  z-index: 1;
  pointer-events: none;
  opacity: 0.035;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='120' height='120'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='3'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
}

.glow {
  position: fixed;
  border-radius: 50%;
  filter: blur(110px);
  z-index: 0;
  pointer-events: none;
  opacity: 0.5;
}

.glow-1 {
  width: 480px;
  height: 480px;
  top: -160px;
  right: -120px;
  background: radial-gradient(circle, rgba(255, 122, 61, 0.28), transparent 70%);
}

.glow-2 {
  width: 420px;
  height: 420px;
  top: 40%;
  left: -180px;
  background: radial-gradient(circle, rgba(255, 184, 77, 0.14), transparent 70%);
}

/* ===== NAV ===== */
.nav {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  z-index: 100;
  transition: all 0.35s var(--ease);
}

.nav.scrolled {
  background: rgba(10, 10, 12, 0.72);
  backdrop-filter: blur(18px) saturate(160%);
  border-bottom: 1px solid var(--border);
}

.nav-inner {
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 1.1rem 1.5rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  transition: padding 0.35s var(--ease);
}

.nav.scrolled .nav-inner {
  padding: 0.75rem 1.5rem;
}

.brand {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  font-weight: 700;
  font-size: 1.05rem;
  letter-spacing: -0.02em;
}

.brand-mark {
  font-family: var(--mono);
  color: var(--accent);
  font-weight: 600;
  font-size: 1.1rem;
}

.brand-name .dot {
  color: var(--accent);
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 2rem;
}

.nav-links a {
  font-size: 0.92rem;
  font-weight: 500;
  color: var(--muted);
  transition: color 0.25s;
  position: relative;
}

.nav-links a:not(.nav-cta)::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: -6px;
  width: 0;
  height: 2px;
  background: var(--accent);
  transition: width 0.3s var(--ease);
}

.nav-links a:not(.nav-cta):hover {
  color: var(--text);
}

.nav-links a:not(.nav-cta):hover::after {
  width: 100%;
}

.nav-cta {
  padding: 0.5rem 1.1rem;
  border: 1px solid var(--border-strong);
  border-radius: 50px;
  color: var(--text) !important;
  transition: all 0.25s;
}

.nav-cta:hover {
  border-color: var(--accent);
  background: var(--accent-soft);
}

.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 6px;
}

.nav-toggle span {
  width: 24px;
  height: 2px;
  background: var(--text);
  border-radius: 2px;
  transition: 0.3s var(--ease);
}

.nav-toggle.open span:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}
.nav-toggle.open span:nth-child(2) {
  opacity: 0;
}
.nav-toggle.open span:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

/* ===== BUTTONS ===== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.55rem;
  padding: 0.9rem 1.6rem;
  border-radius: 50px;
  font-family: var(--font);
  font-size: 0.95rem;
  font-weight: 600;
  cursor: pointer;
  border: 1px solid transparent;
  transition: all 0.3s var(--ease);
  white-space: nowrap;
}

.btn svg {
  transition: transform 0.3s var(--ease);
}

.btn-sm {
  padding: 0.62rem 1.1rem;
  font-size: 0.85rem;
}

.btn-primary {
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  color: #14110d;
  box-shadow: 0 8px 28px -8px var(--accent-glow);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 14px 38px -10px var(--accent-glow);
}

.btn-primary:hover svg {
  transform: translateX(3px);
}

.btn-ghost {
  background: rgba(255, 255, 255, 0.03);
  border-color: var(--border-strong);
  color: var(--text);
}

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

/* ===== HERO ===== */
.hero {
  position: relative;
  z-index: 2;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  justify-content: center;
  padding: 7rem 1.5rem 3rem;
  max-width: var(--maxw);
  margin: 0 auto;
}

.hero-inner {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 3.5rem;
  align-items: center;
  flex: 1;
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 0.55rem;
  font-family: var(--mono);
  font-size: 0.82rem;
  color: var(--muted);
  padding: 0.4rem 0.9rem;
  border: 1px solid var(--border);
  border-radius: 50px;
  margin-bottom: 1.7rem;
}

.status-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--green);
  box-shadow: 0 0 0 0 rgba(61, 220, 132, 0.5);
  animation: pulse 2s infinite;
}

@keyframes pulse {
  0% { box-shadow: 0 0 0 0 rgba(61, 220, 132, 0.5); }
  70% { box-shadow: 0 0 0 8px rgba(61, 220, 132, 0); }
  100% { box-shadow: 0 0 0 0 rgba(61, 220, 132, 0); }
}

.hero h1 {
  font-size: clamp(2.4rem, 5.2vw, 4.1rem);
  line-height: 1.04;
  font-weight: 800;
  letter-spacing: -0.035em;
  margin-bottom: 1.4rem;
}

.accent {
  background: linear-gradient(120deg, var(--accent), var(--accent-2));
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}

.hero-sub {
  font-size: 1.12rem;
  color: var(--muted);
  max-width: 30rem;
  margin-bottom: 2rem;
}

.hero-roles {
  display: flex;
  flex-wrap: wrap;
  gap: 0.6rem;
  margin-bottom: 2.2rem;
}

.hero-roles span {
  font-family: var(--mono);
  font-size: 0.82rem;
  color: var(--text);
  padding: 0.4rem 0.85rem;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 8px;
}

.hero-actions {
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
}

/* code card */
.code-card {
  background: linear-gradient(180deg, var(--surface), var(--bg-soft));
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: 0 40px 80px -30px rgba(0, 0, 0, 0.8);
  transform: rotate(1.2deg);
  transition: transform 0.5s var(--ease);
}

.code-card:hover {
  transform: rotate(0deg) translateY(-4px);
}

.code-head {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.85rem 1.1rem;
  background: rgba(255, 255, 255, 0.02);
  border-bottom: 1px solid var(--border);
}

.code-dot {
  width: 12px;
  height: 12px;
  border-radius: 50%;
}
.code-dot.red { background: #ff5f57; }
.code-dot.yellow { background: #febc2e; }
.code-dot.green { background: #28c840; }

.code-file {
  margin-left: 0.5rem;
  font-family: var(--mono);
  font-size: 0.78rem;
  color: var(--faint);
}

.code-body {
  padding: 1.4rem 1.5rem;
  font-family: var(--mono);
  font-size: 0.82rem;
  line-height: 1.85;
  color: #c8c8d0;
  overflow-x: auto;
}

.c-key { color: #ff9f6b; }
.c-type { color: #ffd479; }
.c-str { color: #8fd98f; }
.c-fn { color: #79c0ff; }

.hero-stats {
  display: flex;
  gap: 2.5rem;
  margin-top: 3.5rem;
  padding-top: 2.2rem;
  border-top: 1px solid var(--border);
  flex-wrap: wrap;
}

.hero-stats div {
  display: flex;
  flex-direction: column;
}

.hero-stats strong {
  font-size: 1.5rem;
  font-weight: 800;
  letter-spacing: -0.02em;
}

.hero-stats span {
  font-size: 0.85rem;
  color: var(--muted);
}

/* ===== SECTIONS ===== */
.section {
  position: relative;
  z-index: 2;
  padding: 6rem 0;
}

.section-head {
  max-width: 40rem;
  margin-bottom: 3.2rem;
}

.kicker {
  font-family: var(--mono);
  font-size: 0.82rem;
  color: var(--accent);
  letter-spacing: 0.02em;
  display: block;
  margin-bottom: 0.9rem;
}

.section-head h2,
.about-text h2,
.contact-card h2 {
  font-size: clamp(1.8rem, 3.6vw, 2.6rem);
  font-weight: 800;
  letter-spacing: -0.03em;
  line-height: 1.1;
  margin-bottom: 0.9rem;
}

.section-head p {
  color: var(--muted);
  font-size: 1.05rem;
}

/* ===== ABOUT ===== */
.about-grid {
  display: grid;
  grid-template-columns: 0.85fr 1.15fr;
  gap: 3.5rem;
  align-items: center;
}

.about-photo {
  position: relative;
}

.about-photo img {
  width: 100%;
  aspect-ratio: 4 / 5;
  object-fit: cover;
  border-radius: var(--radius-lg);
  border: 1px solid var(--border);
  filter: grayscale(0.15) contrast(1.05);
}

.about-photo::after {
  content: "";
  position: absolute;
  inset: 0;
  border-radius: var(--radius-lg);
  background: linear-gradient(180deg, transparent 55%, rgba(10, 10, 12, 0.5));
  pointer-events: none;
}

.about-photo-tag {
  position: absolute;
  bottom: 1.1rem;
  left: 1.1rem;
  z-index: 2;
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-family: var(--mono);
  font-size: 0.78rem;
  padding: 0.5rem 0.9rem;
  background: rgba(10, 10, 12, 0.7);
  backdrop-filter: blur(8px);
  border: 1px solid var(--border-strong);
  border-radius: 50px;
}

.about-text p {
  color: var(--muted);
  margin-bottom: 1.1rem;
}

.about-text strong {
  color: var(--text);
  font-weight: 600;
}

.about-facts {
  list-style: none;
  margin: 1.6rem 0;
  display: grid;
  gap: 0.8rem;
}

.about-facts li {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  font-size: 0.95rem;
  color: var(--text);
}

.about-facts svg {
  width: 20px;
  height: 20px;
  flex-shrink: 0;
  color: var(--accent);
  padding: 3px;
  background: var(--accent-soft);
  border-radius: 6px;
}

.about-actions {
  display: flex;
  gap: 0.8rem;
  flex-wrap: wrap;
  margin-top: 1.6rem;
}

/* ===== STACK ===== */
.stack-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 1.2rem;
}

.stack-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.7rem;
  transition: all 0.35s var(--ease);
}

.stack-card:hover {
  border-color: var(--border-strong);
  transform: translateY(-4px);
  background: var(--surface-2);
}

.stack-icon {
  width: 46px;
  height: 46px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 12px;
  background: var(--accent-soft);
  color: var(--accent);
  margin-bottom: 1.1rem;
}

.stack-icon svg {
  width: 24px;
  height: 24px;
}

.stack-card h3 {
  font-size: 1.05rem;
  font-weight: 700;
  margin-bottom: 1rem;
}

.tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.45rem;
}

.tags span {
  font-family: var(--mono);
  font-size: 0.76rem;
  color: var(--muted);
  padding: 0.32rem 0.65rem;
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid var(--border);
  border-radius: 6px;
}

/* ===== PROJECTS ===== */
.filters {
  display: flex;
  flex-wrap: wrap;
  gap: 0.6rem;
  margin-bottom: 2.5rem;
}

.filter {
  font-family: var(--font);
  font-size: 0.88rem;
  font-weight: 500;
  color: var(--muted);
  padding: 0.55rem 1.15rem;
  background: transparent;
  border: 1px solid var(--border);
  border-radius: 50px;
  cursor: pointer;
  transition: all 0.25s var(--ease);
}

.filter:hover {
  color: var(--text);
  border-color: var(--border-strong);
}

.filter.active {
  color: #14110d;
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  border-color: transparent;
  font-weight: 600;
}

.projects-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(330px, 1fr));
  gap: 1.4rem;
}

.project {
  position: relative;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.7rem;
  display: flex;
  flex-direction: column;
  overflow: hidden;
  transition: all 0.4s var(--ease);
}

.project::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--accent), var(--accent-2));
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.4s var(--ease);
}

.project:hover {
  transform: translateY(-5px);
  border-color: var(--border-strong);
  background: var(--surface-2);
}

.project:hover::before {
  transform: scaleX(1);
}

.project-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 1.1rem;
}

.project-icon {
  width: 44px;
  height: 44px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 11px;
  background: var(--accent-soft);
  color: var(--accent);
  font-family: var(--mono);
  font-weight: 600;
}

.project-icon svg {
  width: 22px;
  height: 22px;
}

.project-cat {
  font-family: var(--mono);
  font-size: 0.7rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--faint);
  padding: 0.3rem 0.6rem;
  border: 1px solid var(--border);
  border-radius: 50px;
}

.project h3 {
  font-size: 1.18rem;
  font-weight: 700;
  letter-spacing: -0.01em;
  margin-bottom: 0.6rem;
}

.project p {
  font-size: 0.92rem;
  color: var(--muted);
  flex: 1;
  margin-bottom: 1.2rem;
}

.project-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
}

.project-tags span {
  font-family: var(--mono);
  font-size: 0.72rem;
  color: var(--accent-2);
  padding: 0.26rem 0.55rem;
  background: var(--accent-soft);
  border-radius: 5px;
}

.project.hide {
  display: none;
}

/* ===== CONTACT ===== */
.contact-card {
  text-align: center;
  max-width: 42rem;
  margin: 0 auto;
  padding: 3.5rem 2rem;
  background: radial-gradient(
      120% 120% at 50% 0%,
      rgba(255, 122, 61, 0.08),
      transparent 60%
    ),
    var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
}

.contact-card .kicker {
  margin-bottom: 1rem;
}

.contact-card p {
  color: var(--muted);
  font-size: 1.05rem;
  max-width: 32rem;
  margin: 0 auto 2rem;
}

.contact-actions {
  display: flex;
  gap: 1rem;
  justify-content: center;
  flex-wrap: wrap;
}

/* ===== FOOTER ===== */
.footer {
  position: relative;
  z-index: 2;
  border-top: 1px solid var(--border);
  padding: 2.2rem 0;
}

.footer-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  flex-wrap: wrap;
}

.footer p {
  color: var(--faint);
  font-size: 0.85rem;
}

.to-top {
  width: 40px;
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  border: 1px solid var(--border);
  border-radius: 50%;
  color: var(--muted);
  transition: all 0.3s var(--ease);
}

.to-top:hover {
  border-color: var(--accent);
  color: var(--accent);
  transform: translateY(-3px);
}

/* ===== REVEAL ANIM ===== */
.reveal {
  opacity: 0;
  transform: translateY(28px);
  transition: opacity 0.7s var(--ease), transform 0.7s var(--ease);
}

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

/* ===== RESPONSIVE ===== */
@media (max-width: 920px) {
  .hero-inner {
    grid-template-columns: 1fr;
    gap: 2.5rem;
  }
  .hero-right {
    order: -1;
    max-width: 440px;
  }
  .about-grid {
    grid-template-columns: 1fr;
    gap: 2.2rem;
  }
  .about-photo {
    max-width: 360px;
  }
}

@media (max-width: 720px) {
  .nav-links {
    position: fixed;
    top: 0;
    right: 0;
    height: 100vh;
    width: min(80vw, 320px);
    flex-direction: column;
    align-items: flex-start;
    justify-content: center;
    gap: 1.8rem;
    padding: 2rem 2.5rem;
    background: rgba(12, 12, 14, 0.96);
    backdrop-filter: blur(20px);
    border-left: 1px solid var(--border);
    transform: translateX(100%);
    transition: transform 0.4s var(--ease);
  }
  .nav-links.open {
    transform: translateX(0);
  }
  .nav-links a {
    font-size: 1.1rem;
  }
  .nav-toggle {
    display: flex;
    z-index: 110;
  }
  .section {
    padding: 4.5rem 0;
  }
  .hero {
    padding-top: 6rem;
  }
  .hero-stats {
    gap: 1.6rem;
  }
}

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