/* ═══════════════════════════════════════════
   TOKENS & VARIABLES
═══════════════════════════════════════════ */
:root {
  --bg: #060912;
  --bg2: #0d1220;
  --bg3: #141a2e;
  --glass: rgba(255,255,255,0.04);
  --glass-border: rgba(255,255,255,0.08);
  --accent: #4f8ef7;
  --accent2: #7c5cfc;
  --accent3: #00e5ff;
  --text: #e8eaf6;
  --text-muted: #7986b8;
  --text-dim: #4a5490;
  --success: #00e676;
  --warning: #ffb300;
  --danger: #ff5252;
  --card-radius: 20px;
  --transition: 0.35s cubic-bezier(0.4,0,0.2,1);
  --font-display: 'Syne', sans-serif;
  --font-mono: 'JetBrains Mono', monospace;
  --glow: 0 0 40px rgba(79,142,247,0.25);
}
[data-theme="light"] {
  --bg: #f0f2ff;
  --bg2: #e4e8ff;
  --bg3: #d8deff;
  --glass: rgba(0,0,0,0.04);
  --glass-border: rgba(0,0,0,0.1);
  --text: #1a1e3c;
  --text-muted: #4a5490;
  --text-dim: #8892b0;
}
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-display);
  overflow-x: hidden;
  transition: background var(--transition), color var(--transition);
  /* Proteção de conteúdo */
  -webkit-user-select: none;
  -moz-user-select: none;
  -ms-user-select: none;
  user-select: none;
}

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

/* ═══════════════════════════════════════════
   NOISE OVERLAY
═══════════════════════════════════════════ */
body::before {
  content: '';
  position: fixed;
  inset: 0;
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 256 256' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='noise'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23noise)' opacity='0.04'/%3E%3C/svg%3E");
  pointer-events: none;
  z-index: 0;
  opacity: 0.5;
}

/* ═══════════════════════════════════════════
   NAVBAR
═══════════════════════════════════════════ */
.navbar {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 1000;
  padding: 0 40px;
  height: 70px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid transparent;
  transition: border-color var(--transition), background var(--transition);
}
.navbar.scrolled {
  background: rgba(6,9,18,0.85);
  border-color: var(--glass-border);
}
.nav-logo {
  font-size: 1.4rem;
  font-weight: 800;
  background: linear-gradient(135deg, var(--accent), var(--accent3));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  letter-spacing: -1px;
  cursor: pointer;
}
.nav-links {
  display: flex;
  gap: 8px;
  list-style: none;
}
.nav-links a {
  color: var(--text-muted);
  text-decoration: none;
  font-size: 0.85rem;
  font-weight: 600;
  letter-spacing: 0.05em;
  padding: 6px 14px;
  border-radius: 8px;
  transition: all var(--transition);
  position: relative;
}
.nav-links a:hover { color: var(--text); background: var(--glass); }
.nav-actions { display: flex; gap: 12px; align-items: center; }
.theme-btn {
  background: var(--glass);
  border: 1px solid var(--glass-border);
  color: var(--text-muted);
  width: 38px; height: 38px;
  border-radius: 10px;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1rem;
  transition: all var(--transition);
}
.theme-btn:hover { color: var(--accent); border-color: var(--accent); }
.hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  cursor: pointer;
  padding: 4px;
}
.hamburger span {
  display: block;
  width: 24px; height: 2px;
  background: var(--text);
  border-radius: 2px;
  transition: all var(--transition);
}
.mobile-menu {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(6,9,18,0.97);
  z-index: 999;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 32px;
}
.mobile-menu.active { display: flex; }
.mobile-menu a {
  color: var(--text);
  text-decoration: none;
  font-size: 1.8rem;
  font-weight: 800;
  transition: color var(--transition);
}
.mobile-menu a:hover { color: var(--accent); }
.mobile-close {
  position: absolute;
  top: 20px; right: 30px;
  font-size: 2rem;
  cursor: pointer;
  color: var(--text-muted);
}

/* ═══════════════════════════════════════════
   SECTIONS BASE
═══════════════════════════════════════════ */
section {
  position: relative;
  z-index: 1;
  padding: 120px 0;
}
.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 40px;
}
.section-label {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--accent);
  letter-spacing: 0.2em;
  text-transform: uppercase;
  margin-bottom: 12px;
}
.section-title {
  font-size: clamp(2rem, 4vw, 3.5rem);
  font-weight: 800;
  line-height: 1.1;
  margin-bottom: 60px;
  background: linear-gradient(135deg, var(--text) 60%, var(--text-muted));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

/* ═══════════════════════════════════════════
   HERO
═══════════════════════════════════════════ */
#home {
  min-height: 100vh;
  display: flex;
  align-items: center;
  padding-top: 70px;
  overflow: hidden;
}
.hero-bg {
  position: absolute;
  inset: 0;
  overflow: hidden;
}
.hero-orb {
  position: absolute;
  border-radius: 50%;
  filter: blur(80px);
  opacity: 0.15;
  animation: float 8s ease-in-out infinite;
}
.hero-orb-1 {
  width: 600px; height: 600px;
  background: var(--accent);
  top: -200px; right: -100px;
}
.hero-orb-2 {
  width: 400px; height: 400px;
  background: var(--accent2);
  bottom: -100px; left: -100px;
  animation-delay: -4s;
}
@keyframes float {
  0%, 100% { transform: translateY(0) scale(1); }
  50% { transform: translateY(-30px) scale(1.05); }
}
.grid-bg {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(var(--glass-border) 1px, transparent 1px),
    linear-gradient(90deg, var(--glass-border) 1px, transparent 1px);
  background-size: 50px 50px;
  mask-image: radial-gradient(ellipse 80% 80% at 50% 50%, black 0%, transparent 100%);
}
.hero-inner {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 80px;
  align-items: center;
  position: relative;
  z-index: 2;
}
.hero-content { animation: slideInLeft 0.8s ease both; }
.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: var(--glass);
  border: 1px solid var(--glass-border);
  border-radius: 100px;
  padding: 6px 16px;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--accent3);
  margin-bottom: 24px;
}
.hero-badge::before {
  content: '';
  width: 6px; height: 6px;
  background: var(--success);
  border-radius: 50%;
  box-shadow: 0 0 8px var(--success);
  animation: pulse 2s infinite;
}
@keyframes pulse { 0%, 100% { opacity: 1; } 50% { opacity: 0.4; } }
.hero-name {
  font-size: clamp(3rem, 6vw, 5.5rem);
  font-weight: 800;
  line-height: 1;
  margin-bottom: 16px;
  letter-spacing: -2px;
}
.hero-name span {
  background: linear-gradient(135deg, var(--accent), var(--accent3));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
.hero-title {
  font-family: var(--font-mono);
  font-size: 1.1rem;
  color: var(--text-muted);
  margin-bottom: 20px;
  display: flex;
  align-items: center;
  gap: 8px;
}
.type-cursor {
  display: inline-block;
  width: 2px;
  height: 1.1em;
  background: var(--accent);
  animation: blink 1s infinite;
  vertical-align: middle;
}
@keyframes blink { 0%, 100% { opacity: 1; } 50% { opacity: 0; } }
.hero-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 40px;
}
.hero-tag {
  padding: 4px 12px;
  border-radius: 6px;
  font-size: 0.75rem;
  font-family: var(--font-mono);
  background: var(--glass);
  border: 1px solid var(--glass-border);
  color: var(--text-muted);
}
.hero-actions { display: flex; gap: 16px; flex-wrap: wrap; }
.btn-primary {
  background: linear-gradient(135deg, var(--accent), var(--accent2));
  color: #fff;
  border: none;
  padding: 14px 32px;
  border-radius: 12px;
  font-size: 0.9rem;
  font-weight: 700;
  cursor: pointer;
  text-decoration: none;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  transition: all var(--transition);
  position: relative;
  overflow: hidden;
}
.btn-primary::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(255,255,255,0.2), transparent);
  transform: translateX(-100%);
  transition: transform 0.5s;
}
.btn-primary:hover::before { transform: translateX(100%); }
.btn-primary:hover { transform: translateY(-2px); box-shadow: var(--glow); }
.btn-secondary {
  background: var(--glass);
  border: 1px solid var(--glass-border);
  color: var(--text);
  padding: 14px 32px;
  border-radius: 12px;
  font-size: 0.9rem;
  font-weight: 700;
  cursor: pointer;
  text-decoration: none;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  transition: all var(--transition);
}
.btn-secondary:hover { border-color: var(--accent); color: var(--accent); transform: translateY(-2px); }

/* HERO VISUAL */
.hero-visual {
  animation: slideInRight 0.8s ease both;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 24px;
}
.photo-frame {
  position: relative;
  width: 280px; height: 280px;
}
.photo-ring {
  position: absolute;
  inset: -12px;
  border-radius: 50%;
  background: conic-gradient(from 0deg, var(--accent), var(--accent2), var(--accent3), var(--accent));
  animation: spin 4s linear infinite;
}
@keyframes spin { to { transform: rotate(360deg); } }
.photo-ring-inner {
  position: absolute;
  inset: 3px;
  border-radius: 50%;
  background: var(--bg);
}
.photo-img {
  position: absolute;
  inset: 0;
  border-radius: 50%;
  object-fit: cover;
  width: 100%;
  height: 100%;
  z-index: 1;
  /* Proteção da imagem */
  pointer-events: none;
  -webkit-user-drag: none;
  user-drag: none;
}
.hero-stats {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 12px;
  width: 100%;
}
.stat-card {
  background: var(--glass);
  border: 1px solid var(--glass-border);
  border-radius: 16px;
  padding: 16px;
  text-align: center;
  transition: all var(--transition);
}
.stat-card:hover { border-color: var(--accent); transform: translateY(-4px); }
.stat-num {
  font-size: 1.8rem;
  font-weight: 800;
  background: linear-gradient(135deg, var(--accent), var(--accent3));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
.stat-label { font-size: 0.7rem; color: var(--text-muted); font-family: var(--font-mono); }

@keyframes slideInLeft { from { opacity: 0; transform: translateX(-40px); } to { opacity: 1; transform: translateX(0); } }
@keyframes slideInRight { from { opacity: 0; transform: translateX(40px); } to { opacity: 1; transform: translateX(0); } }

/* ═══════════════════════════════════════════
   ABOUT
═══════════════════════════════════════════ */
#sobre { background: var(--bg2); }
.about-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 80px;
  align-items: center;
}
.about-text p {
  color: var(--text-muted);
  font-size: 1rem;
  line-height: 1.9;
  margin-bottom: 20px;
}
.about-highlight {
  color: var(--accent);
  font-weight: 700;
}
.about-features {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
  margin-top: 32px;
}
.feature-item {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  padding: 16px;
  background: var(--glass);
  border: 1px solid var(--glass-border);
  border-radius: 14px;
  transition: all var(--transition);
}
.feature-item:hover { border-color: var(--accent); }
.feature-icon {
  width: 36px; height: 36px;
  border-radius: 10px;
  background: linear-gradient(135deg, var(--accent), var(--accent2));
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.9rem;
  flex-shrink: 0;
}
.feature-text h4 { font-size: 0.85rem; margin-bottom: 2px; }
.feature-text p { font-size: 0.75rem; color: var(--text-muted); }
.about-code {
  background: var(--bg3);
  border: 1px solid var(--glass-border);
  border-radius: 20px;
  padding: 32px;
  font-family: var(--font-mono);
  font-size: 0.82rem;
  line-height: 1.8;
  position: relative;
  overflow: hidden;
}
.about-code::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 40px;
  background: var(--glass);
  border-bottom: 1px solid var(--glass-border);
}
.code-dots {
  position: absolute;
  top: 14px; left: 16px;
  display: flex;
  gap: 6px;
}
.code-dot {
  width: 10px; height: 10px;
  border-radius: 50%;
}
.code-dot:nth-child(1) { background: #ff5f57; }
.code-dot:nth-child(2) { background: #febc2e; }
.code-dot:nth-child(3) { background: #28c840; }
.code-content { padding-top: 20px; }
.c-keyword { color: #c792ea; }
.c-str { color: #c3e88d; }
.c-prop { color: #82aaff; }
.c-num { color: #f78c6c; }
.c-comment { color: var(--text-dim); }
.c-bool { color: #89ddff; }

/* ═══════════════════════════════════════════
   SKILLS
═══════════════════════════════════════════ */
#skills { background: var(--bg); }
.skills-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 20px;
}
.skill-card {
  background: var(--glass);
  border: 1px solid var(--glass-border);
  border-radius: var(--card-radius);
  padding: 24px;
  transition: all var(--transition);
  opacity: 0;
  transform: translateY(20px);
}
.skill-card.visible {
  opacity: 1;
  transform: translateY(0);
  transition: opacity 0.5s ease, transform 0.5s ease, border-color var(--transition), box-shadow var(--transition);
}
.skill-card:hover {
  border-color: var(--accent);
  box-shadow: var(--glow);
}
.skill-header {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 16px;
}
.skill-icon-wrap {
  width: 44px; height: 44px;
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.4rem;
  background: var(--bg3);
  border: 1px solid var(--glass-border);
}
.skill-name { font-size: 0.95rem; font-weight: 700; }
.skill-level { font-family: var(--font-mono); font-size: 0.7rem; color: var(--text-muted); }
.skill-bar-track {
  background: var(--bg3);
  border-radius: 100px;
  height: 6px;
  overflow: hidden;
}
.skill-bar-fill {
  height: 100%;
  border-radius: 100px;
  width: 0;
  transition: width 1.2s cubic-bezier(0.4,0,0.2,1);
  position: relative;
}
.skill-bar-fill::after {
  content: '';
  position: absolute;
  right: 0; top: 50%;
  transform: translateY(-50%);
  width: 8px; height: 8px;
  border-radius: 50%;
  background: inherit;
  box-shadow: 0 0 6px currentColor;
}
.lvl-1 { background: linear-gradient(90deg, #ff5252, #ff9800); }
.lvl-2 { background: linear-gradient(90deg, #ff9800, #ffeb3b); }
.lvl-3 { background: linear-gradient(90deg, #4caf50, #00e676); }
.lvl-4 { background: linear-gradient(90deg, var(--accent), var(--accent3)); }

/* ═══════════════════════════════════════════
   PROJECTS
═══════════════════════════════════════════ */
#projetos { background: var(--bg2); }
.projects-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(360px, 1fr));
  gap: 24px;
}
.project-card {
  background: var(--glass);
  border: 1px solid var(--glass-border);
  border-radius: var(--card-radius);
  padding: 32px;
  transition: all var(--transition);
  display: flex;
  flex-direction: column;
  gap: 16px;
}
.project-card:hover {
  border-color: var(--accent);
  transform: translateY(-6px);
  box-shadow: 0 20px 60px rgba(79,142,247,0.15);
}
.project-header {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 12px;
}
.project-icon {
  font-size: 2rem;
  padding: 12px;
  background: var(--bg3);
  border-radius: 14px;
  border: 1px solid var(--glass-border);
}
.project-links { display: flex; gap: 8px; }
.project-link {
  width: 36px; height: 36px;
  border-radius: 10px;
  border: 1px solid var(--glass-border);
  background: var(--bg3);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-muted);
  text-decoration: none;
  transition: all var(--transition);
  font-size: 0.9rem;
}
.project-link:hover { border-color: var(--accent); color: var(--accent); }
.project-name { font-size: 1.2rem; font-weight: 800; }
.project-desc { color: var(--text-muted); font-size: 0.9rem; line-height: 1.6; }
.project-tags { display: flex; flex-wrap: wrap; gap: 6px; margin-top: auto; }
.project-tag {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  padding: 3px 10px;
  border-radius: 100px;
  background: var(--bg3);
  border: 1px solid var(--glass-border);
  color: var(--accent);
}
.project-status {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 0.72rem;
  font-family: var(--font-mono);
  color: var(--success);
}
.project-status::before {
  content: '';
  width: 6px; height: 6px;
  border-radius: 50%;
  background: var(--success);
}

/* ═══════════════════════════════════════════
   ARCHITECTURE
═══════════════════════════════════════════ */
#arquitetura { background: var(--bg); }
.arch-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: 20px;
}
.arch-card {
  background: var(--glass);
  border: 1px solid var(--glass-border);
  border-radius: var(--card-radius);
  padding: 28px;
  transition: all var(--transition);
}
.arch-card:hover {
  border-color: var(--accent2);
  box-shadow: 0 0 30px rgba(124,92,252,0.15);
}
.arch-icon {
  font-size: 2rem;
  margin-bottom: 16px;
  display: inline-flex;
  width: 52px; height: 52px;
  align-items: center;
  justify-content: center;
  border-radius: 14px;
  background: linear-gradient(135deg, var(--accent2), var(--accent));
}
.arch-title { font-size: 1rem; font-weight: 700; margin-bottom: 8px; }
.arch-desc { font-size: 0.85rem; color: var(--text-muted); line-height: 1.7; }
.arch-tags { display: flex; flex-wrap: wrap; gap: 6px; margin-top: 14px; }
.arch-tag {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  padding: 2px 8px;
  border-radius: 4px;
  background: var(--bg3);
  color: var(--accent2);
}

/* ═══════════════════════════════════════════
   CONTACT
═══════════════════════════════════════════ */
#contato { background: var(--bg2); }
.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1.2fr;
  gap: 80px;
}
.contact-info h3 { font-size: 1.5rem; margin-bottom: 16px; }
.contact-info p { color: var(--text-muted); font-size: 0.95rem; line-height: 1.8; margin-bottom: 32px; }
.social-links { display: flex; flex-direction: column; gap: 12px; }
.social-link {
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 16px;
  background: var(--glass);
  border: 1px solid var(--glass-border);
  border-radius: 14px;
  text-decoration: none;
  color: var(--text);
  transition: all var(--transition);
}
.social-link:hover { border-color: var(--accent); transform: translateX(6px); }
.social-link-icon {
  width: 40px; height: 40px;
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.1rem;
  background: var(--bg3);
}
.social-link-text { flex: 1; }
.social-link-text strong { display: block; font-size: 0.9rem; }
.social-link-text span { font-size: 0.78rem; color: var(--text-muted); font-family: var(--font-mono); }
.contact-form { display: flex; flex-direction: column; gap: 16px; }
.form-group { display: flex; flex-direction: column; gap: 8px; }
.form-label { font-size: 0.8rem; font-weight: 600; color: var(--text-muted); font-family: var(--font-mono); }
.form-input, .form-textarea {
  background: var(--glass);
  border: 1px solid var(--glass-border);
  border-radius: 12px;
  padding: 14px 18px;
  color: var(--text);
  font-family: var(--font-display);
  font-size: 0.9rem;
  transition: all var(--transition);
  outline: none;
  resize: none;
  /* Permitir seleção apenas nos campos de formulário */
  -webkit-user-select: text;
  -moz-user-select: text;
  -ms-user-select: text;
  user-select: text;
}
.form-input:focus, .form-textarea:focus { border-color: var(--accent); box-shadow: 0 0 0 3px rgba(79,142,247,0.1); }
.form-textarea { height: 140px; }
.form-success {
  display: none;
  align-items: center;
  gap: 10px;
  padding: 16px;
  background: rgba(0,230,118,0.08);
  border: 1px solid rgba(0,230,118,0.3);
  border-radius: 12px;
  color: var(--success);
  font-size: 0.9rem;
}
.form-success.show { display: flex; }
.form-error {
  color: var(--danger);
  font-size: 0.75rem;
  font-family: var(--font-mono);
}

/* ═══════════════════════════════════════════
   FOOTER
═══════════════════════════════════════════ */
footer {
  background: var(--bg);
  border-top: 1px solid var(--glass-border);
  padding: 40px;
  text-align: center;
  position: relative;
  z-index: 1;
}
footer p { color: var(--text-dim); font-size: 0.82rem; font-family: var(--font-mono); }
footer span { color: var(--accent); }

/* ═══════════════════════════════════════════
   REVEAL ANIMATIONS
═══════════════════════════════════════════ */
.reveal {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}
.reveal.visible { opacity: 1; transform: translateY(0); }
.reveal-delay-1 { transition-delay: 0.1s; }
.reveal-delay-2 { transition-delay: 0.2s; }
.reveal-delay-3 { transition-delay: 0.3s; }

/* ═══════════════════════════════════════════
   SCROLL TOP
═══════════════════════════════════════════ */
.scroll-top {
  position: fixed;
  bottom: 30px;
  right: 30px;
  width: 44px;
  height: 44px;
  border-radius: 12px;
  background: linear-gradient(135deg, var(--accent), var(--accent2));
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  border: none;
  font-size: 1rem;
  opacity: 0;
  transform: translateY(20px);
  transition: all var(--transition);
  z-index: 999;
}
.scroll-top.visible { opacity: 1; transform: translateY(0); }
.scroll-top:hover { transform: translateY(-4px); }

/* ═══════════════════════════════════════════
   RESPONSIVE
═══════════════════════════════════════════ */
@media (max-width: 900px) {
  .hero-inner { grid-template-columns: 1fr; text-align: center; }
  .hero-visual { order: -1; }
  .hero-tags, .hero-actions { justify-content: center; }
  .about-grid, .contact-grid { grid-template-columns: 1fr; }
  .about-features { grid-template-columns: 1fr; }
  .nav-links { display: none; }
  .hamburger { display: flex; }
  section { padding: 80px 0; }
}
@media (max-width: 600px) {
  .container { padding: 0 20px; }
  .navbar { padding: 0 20px; }
  .hero-stats { grid-template-columns: repeat(3, 1fr); }
  .projects-grid { grid-template-columns: 1fr; }
}