/* ===== RESET & BASE ===== */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

:root {
  --bg:        #0d0d0d;
  --surface:   #141414;
  --surface-2: #1c1c1c;
  --border:    #2a2a2a;
  --accent:    #7c6af7;
  --accent-dim:#7c6af722;
  --text:      #e2e2e2;
  --muted:     #8a8a8a;
  --font:      'Inter', 'Segoe UI', system-ui, sans-serif;
  --mono:      'JetBrains Mono', 'Fira Code', monospace;
}

html {
  scroll-behavior: smooth;
}

:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 3px;
  border-radius: 2px;
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }
}

.skip-link {
  position: absolute;
  top: -100%;
  left: 1rem;
  z-index: 200;
  background: var(--accent);
  color: #fff;
  padding: 0.6rem 1.1rem;
  border-radius: 6px;
  font-size: 0.85rem;
  font-weight: 600;
  transition: top 0.2s;
}

.skip-link:focus-visible {
  top: 1rem;
  outline-offset: 4px;
}

body {
  background-color: var(--bg);
  color: var(--text);
  font-family: var(--font);
  font-size: 16px;
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
}

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

ul { list-style: none; }

/* ===== SCROLLBAR ===== */
::-webkit-scrollbar { width: 6px; }
::-webkit-scrollbar-track { background: var(--bg); }
::-webkit-scrollbar-thumb { background: var(--border); border-radius: 3px; }

/* ===== NAV ===== */
nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1.1rem 2.5rem;
  background: rgba(13, 13, 13, 0.85);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
}

.nav-logo {
  font-family: var(--mono);
  font-size: 1rem;
  color: var(--text);
  font-weight: 700;
  letter-spacing: 2px;
}

.nav-logo-caret {
  color: var(--accent);
}

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

nav ul {
  display: flex;
  gap: 2rem;
}

nav ul a {
  font-size: 0.85rem;
  color: var(--muted);
  transition: color 0.2s;
  letter-spacing: 0.03em;
}

nav ul a:hover,
nav ul a.active {
  color: var(--text);
}

/* ===== LANG SWITCH ===== */
.lang-switch {
  display: flex;
  gap: 0.4rem;
  padding-left: 1.5rem;
  border-left: 1px solid var(--border);
}

.lang-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  min-width: 32px;
  min-height: 32px;
  padding: 0.4rem;
  border: 1.5px solid transparent;
  border-radius: 4px;
  line-height: 0;
  cursor: pointer;
  background: transparent;
  opacity: 0.5;
  transition: opacity 0.2s, border-color 0.2s, transform 0.2s;
}

.lang-btn svg {
  display: block;
  width: 22px;
  height: 15px;
  border-radius: 3px;
}

.lang-btn:hover {
  opacity: 0.85;
  transform: translateY(-1px);
}

.lang-btn.active {
  opacity: 1;
  border-color: var(--accent);
}

/* ===== CONTAINER ===== */
.container {
  max-width: 1000px;
  margin: 0 auto;
  padding: 0 2rem;
}

/* ===== SECTION LABEL ===== */
.section-label {
  font-family: var(--mono);
  font-size: 0.8rem;
  color: var(--accent);
  letter-spacing: 0.08em;
  margin-bottom: 2.5rem;
  font-weight: 500;
}

/* ===== HERO ===== */
.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  padding: 0 2.5rem;
  max-width: 1000px;
  margin: 0 auto;
  position: relative;
}

.hero-content {
  position: relative;
  z-index: 1;
}

.hero-greeting {
  font-family: var(--mono);
  font-size: 0.9rem;
  color: var(--accent);
  margin-bottom: 0.75rem;
  letter-spacing: 0.05em;
}

.hero h1 {
  font-size: clamp(2.8rem, 7vw, 5rem);
  font-weight: 700;
  line-height: 1.1;
  letter-spacing: -0.02em;
  color: #fff;
}

.hero h2 {
  font-size: clamp(1.2rem, 3vw, 1.8rem);
  font-weight: 400;
  color: var(--muted);
  margin-top: 0.5rem;
  margin-bottom: 1.5rem;
}

.hero-desc {
  max-width: 520px;
  color: #999;
  margin-bottom: 2.5rem;
  font-size: 1rem;
}

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

.btn-primary {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  background: var(--accent);
  color: #fff;
  padding: 0.7rem 1.5rem;
  border-radius: 6px;
  font-size: 0.9rem;
  font-weight: 500;
  transition: opacity 0.2s, transform 0.2s;
}

.btn-primary:hover {
  opacity: 0.85;
  transform: translateY(-1px);
}

.btn-secondary {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  border: 1px solid var(--border);
  color: var(--text);
  padding: 0.7rem 1.5rem;
  border-radius: 6px;
  font-size: 0.9rem;
  font-weight: 500;
  transition: border-color 0.2s, transform 0.2s;
}

.btn-secondary:hover {
  border-color: var(--accent);
  transform: translateY(-1px);
}

.hero-decoration {
  position: absolute;
  right: 4rem;
  top: 50%;
  transform: translateY(-50%);
  display: flex;
  align-items: center;
  justify-content: center;
}

.blob {
  position: absolute;
  width: 400px;
  height: 400px;
  background: radial-gradient(circle, var(--accent-dim) 0%, transparent 70%);
  border-radius: 50%;
  filter: blur(60px);
  pointer-events: none;
}

.hero-photo {
  position: relative;
  width: 260px;
  height: 260px;
  object-fit: cover;
  border-radius: 50%;
  border: 2px solid var(--border);
  box-shadow: 0 0 0 1px var(--accent-dim), 0 20px 60px rgba(0, 0, 0, 0.5);
}

@media (max-width: 1000px) {
  .hero {
    flex-direction: column;
    justify-content: center;
    gap: 2rem;
    text-align: center;
    padding-top: 6rem;
    padding-bottom: 3rem;
    min-height: auto;
  }
  .hero-decoration {
    position: relative;
    right: auto;
    top: auto;
    order: -1;
    transform: none;
  }
  .hero-links {
    justify-content: center;
  }
}

/* ===== SECTIONS ===== */
section {
  position: relative;
  padding: 7rem 0;
}

section::before {
  content: '';
  position: absolute;
  inset: 0;
  pointer-events: none;
  background: radial-gradient(220px circle at var(--sx, 50%) var(--sy, 50%), var(--accent-dim), transparent 70%);
  animation: glow-pulse 3s ease-in-out infinite;
}

section:nth-child(even) {
  background-color: var(--surface);
}

@keyframes glow-pulse {
  0%, 100% { opacity: 0.65; }
  50%      { opacity: 1; }
}

@media (prefers-reduced-motion: reduce) {
  section::before {
    display: none;
  }
}

/* ===== ABOUT ===== */
.about-grid {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 4rem;
  align-items: start;
}

.about-text p {
  color: #aaa;
  margin-bottom: 1rem;
  max-width: 580px;
}

.about-stats {
  display: flex;
  flex-direction: column;
  gap: 2rem;
  padding-left: 2rem;
  border-left: 1px solid var(--border);
}

.stat {
  display: flex;
  flex-direction: column;
  align-items: center;
}

.stat-number {
  font-size: 2.5rem;
  font-weight: 700;
  color: var(--accent);
  font-family: var(--mono);
  line-height: 1;
}

.stat-label {
  font-size: 0.75rem;
  color: var(--muted);
  margin-top: 0.25rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
}

/* ===== EXPERIENCE ===== */
.timeline {
  display: flex;
  flex-direction: column;
  gap: 2.25rem;
  max-width: 760px;
}

.timeline-item {
  display: grid;
  grid-template-columns: 160px 1fr;
  gap: 1.5rem;
  padding-left: 1.5rem;
  border-left: 1px solid var(--border);
  position: relative;
}

.timeline-item::before {
  content: '';
  position: absolute;
  left: -5px;
  top: 0.4rem;
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: var(--accent);
}

.timeline-date {
  font-family: var(--mono);
  font-size: 0.78rem;
  color: var(--muted);
  letter-spacing: 0.02em;
  padding-top: 0.1rem;
}

.timeline-body h4 {
  font-size: 1rem;
  font-weight: 600;
  color: #fff;
  margin-bottom: 0.4rem;
}

.timeline-tag {
  font-family: var(--mono);
  font-size: 0.68rem;
  font-weight: 500;
  color: var(--accent);
  background: var(--accent-dim);
  padding: 0.15rem 0.5rem;
  border-radius: 4px;
  margin-left: 0.5rem;
  vertical-align: middle;
  letter-spacing: 0.02em;
  cursor: help;
}

.timeline-tag.nda {
  color: var(--muted);
  background: transparent;
  border: 1px solid var(--border);
}

.timeline-body p {
  font-size: 0.9rem;
  color: #999;
  max-width: 520px;
}

.timeline-list {
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
  max-width: 520px;
}

.timeline-list li {
  font-size: 0.9rem;
  color: #999;
  padding-left: 1rem;
  position: relative;
  line-height: 1.5;
}

.timeline-list li::before {
  content: '›';
  position: absolute;
  left: 0;
  color: var(--accent);
}

@media (max-width: 700px) {
  .timeline-item { grid-template-columns: 1fr; gap: 0.4rem; }
}

/* ===== PROJECTS ===== */
.category-cards {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1rem;
  margin-bottom: 1rem;
}

.category-card {
  position: relative;
  text-align: left;
  background: var(--surface-2);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 1.25rem 1.25rem 1.1rem;
  cursor: pointer;
  display: flex;
  flex-direction: column;
  gap: 0.55rem;
  transition: border-color 0.2s, transform 0.2s, background 0.2s;
  font-family: inherit;
}

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

.category-card[aria-pressed="true"] {
  border-color: var(--accent);
  background: var(--accent-dim);
}

.category-icon {
  width: 40px;
  height: 40px;
  border-radius: 8px;
  background: var(--accent-dim);
  color: var(--accent);
  display: flex;
  align-items: center;
  justify-content: center;
}

.category-dot {
  position: absolute;
  top: 1.3rem;
  right: 1.3rem;
  width: 8px;
  height: 8px;
  border-radius: 50%;
}

.dot-web  { background: #f0997b; }
.dot-app  { background: #5dcaa5; }
.dot-game { background: #85b7eb; }

.category-name {
  font-size: 0.98rem;
  font-weight: 600;
  color: #fff;
}

.category-count {
  font-family: var(--mono);
  font-size: 0.75rem;
  color: var(--muted);
}

.category-count-num {
  color: var(--accent);
  font-weight: 600;
}

.filter-hint {
  font-family: var(--mono);
  font-size: 0.75rem;
  color: var(--muted);
  margin-bottom: 2rem;
}

.project-card.filtered-out {
  display: none;
}

.projects-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 1.25rem;
}

.project-card {
  background: var(--surface-2);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 1.75rem;
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  transition: border-color 0.2s, transform 0.2s;
}

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

.project-card.featured {
  grid-column: span 2;
  padding: 2.25rem;
}

.project-card.featured h4 {
  font-size: 1.3rem;
}

.project-card.featured p {
  font-size: 0.95rem;
  max-width: 640px;
}

@media (max-width: 700px) {
  .project-card.featured { grid-column: span 1; padding: 1.75rem; }
  .project-card.featured h4 { font-size: 1.05rem; }
  .project-card.featured p { font-size: 0.88rem; }
}

.project-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.project-icon {
  font-size: 1.4rem;
  color: var(--accent);
}

.project-links {
  display: flex;
  gap: 0.25rem;
  margin: -0.4rem -0.4rem 0 0;
}

.project-links a {
  color: var(--muted);
  transition: color 0.2s;
  display: flex;
  align-items: center;
  justify-content: center;
  min-width: 32px;
  min-height: 32px;
  padding: 0.4rem;
  border-radius: 6px;
}

.project-links a:hover {
  color: var(--text);
}

.project-card h4 {
  font-size: 1.05rem;
  font-weight: 600;
  color: #fff;
}

.project-card p {
  font-size: 0.88rem;
  color: var(--muted);
  flex: 1;
}

.project-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-top: 0.5rem;
}

.project-tags span {
  font-family: var(--mono);
  font-size: 0.72rem;
  color: var(--accent);
  background: var(--accent-dim);
  padding: 0.2rem 0.6rem;
  border-radius: 4px;
  letter-spacing: 0.03em;
}

/* ===== SKILLS ===== */
.skills-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(180px, 1fr));
  gap: 2rem;
}

.skill-group h4 {
  font-size: 0.78rem;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--accent);
  font-family: var(--mono);
  margin-bottom: 1rem;
  font-weight: 600;
}

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

.skill-group li {
  font-size: 0.9rem;
  color: #aaa;
  padding-left: 1rem;
  position: relative;
}

.skill-group li::before {
  content: '›';
  position: absolute;
  left: 0;
  color: var(--accent);
}

/* ===== CONTACT ===== */
#contact {
  text-align: center;
}

.contact-intro {
  color: var(--muted);
  margin-bottom: 1.5rem;
  font-size: 1rem;
}

.contact-email {
  display: inline-block;
  font-size: 1.1rem;
  color: var(--text);
  border-bottom: 1px solid var(--accent);
  padding-bottom: 2px;
  transition: color 0.2s;
  margin-bottom: 2.5rem;
}

.contact-email:hover {
  color: var(--accent);
}

.social-links {
  display: flex;
  justify-content: center;
  gap: 1.5rem;
}

.social-links a {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  color: var(--muted);
  font-size: 0.9rem;
  transition: color 0.2s;
  padding: 0.5rem 1rem;
  border: 1px solid var(--border);
  border-radius: 6px;
}

.social-links a:hover {
  color: var(--text);
  border-color: var(--accent);
}

.github-note {
  font-size: 0.78rem;
  color: var(--muted);
  max-width: 420px;
  margin: 1.5rem auto 0;
  text-align: center;
  line-height: 1.5;
}

/* ===== WHATSAPP FLOAT ===== */
.whatsapp-float {
  position: fixed;
  right: 1.75rem;
  bottom: 1.75rem;
  z-index: 200;
  width: 56px;
  height: 56px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: #25d366;
  color: #fff;
  border-radius: 50%;
  box-shadow: 0 6px 20px rgba(37, 211, 102, 0.35);
  transition: transform 0.2s, box-shadow 0.2s;
}

.whatsapp-float::before {
  content: '';
  position: absolute;
  inset: 0;
  border-radius: 50%;
  background: #25d366;
  opacity: 0.55;
  animation: whatsapp-pulse 2.4s ease-out infinite;
  z-index: -1;
}

.whatsapp-float:hover {
  transform: translateY(-3px) scale(1.05);
  box-shadow: 0 10px 26px rgba(37, 211, 102, 0.45);
}

@keyframes whatsapp-pulse {
  0%   { transform: scale(1);   opacity: 0.55; }
  100% { transform: scale(1.6); opacity: 0; }
}

@media (max-width: 700px) {
  .whatsapp-float { right: 1.25rem; bottom: 1.25rem; width: 50px; height: 50px; }
}

@media (prefers-reduced-motion: reduce) {
  .whatsapp-float::before { animation: none; }
}

/* ===== FOOTER ===== */
footer {
  text-align: center;
  padding: 2rem;
  color: var(--muted);
  font-size: 0.8rem;
  border-top: 1px solid var(--border);
}

.back-to-top {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  color: var(--muted);
  font-size: 0.78rem;
  margin-bottom: 1rem;
  padding: 0.3rem 0.6rem;
  border-radius: 6px;
  transition: color 0.2s;
}

.back-to-top:hover {
  color: var(--accent);
}

/* ===== FADE-IN ANIMATION ===== */
.fade-in {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

.fade-in.visible {
  opacity: 1;
  transform: translateY(0);
}

@media (prefers-reduced-motion: reduce) {
  .fade-in {
    opacity: 1;
    transform: none;
    transition: none;
  }
}

/* ===== RESPONSIVE ===== */
@media (max-width: 700px) {
  nav { padding: 1rem 1.25rem; flex-wrap: wrap; row-gap: 0.75rem; }
  .nav-right { gap: 0.9rem; flex-wrap: wrap; row-gap: 0.75rem; }
  nav ul { gap: 0.9rem; flex-wrap: wrap; }
  .lang-switch { padding-left: 0.75rem; gap: 0.3rem; }
  .lang-btn svg { width: 19px; height: 13px; }
  .hero { padding: 9rem 1.25rem 2.5rem; }
  .hero-photo { width: 160px; height: 160px; }
  .blob { width: 250px; height: 250px; }
  .about-grid { grid-template-columns: 1fr; }
  .category-cards { grid-template-columns: 1fr; }
  .about-stats { flex-direction: row; border-left: none; padding-left: 0; border-top: 1px solid var(--border); padding-top: 2rem; }
  .container { padding: 0 1.25rem; }
  section { padding: 5rem 0; }
}