:root {
  --bg-color: #f8fafc;
  --card-bg: #ffffff;
  --text-main: #0f172a;
  --text-muted: #64748b;
  --primary: #2563eb;
  --primary-hover: #1d4ed8;
  --accent: #f59e0b;
  --border-color: #e2e8f0;
  --whatsapp: #25d366;
  --whatsapp-hover: #1ebe5d;
  --shadow: 0 10px 25px -5px rgba(0, 0, 0, 0.08), 0 8px 10px -6px rgba(0, 0, 0, 0.04);
  --nav-bg: rgba(255, 255, 255, 0.85);
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg-color: #0b0f19;
    --card-bg: #131b2e;
    --text-main: #f8fafc;
    --text-muted: #94a3b8;
    --primary: #3b82f6;
    --primary-hover: #60a5fa;
    --border-color: #1e293b;
    --shadow: 0 10px 25px -5px rgba(0, 0, 0, 0.5);
    --nav-bg: rgba(11, 15, 25, 0.85);
  }
}

* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
  scroll-behavior: smooth;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
}

body {
  background-color: var(--bg-color);
  color: var(--text-main);
  line-height: 1.6;
  overflow-x: hidden;
  transition: background-color 0.3s ease, color 0.3s ease;
}

/* Header & Nav */
header {
  position: sticky;
  top: 0;
  z-index: 1000;
  background: var(--nav-bg);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border-color);
}

.navbar {
  max-width: 1200px;
  margin: 0 auto;
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 1rem 1.5rem;
}

.logo {
  font-size: 1.35rem;
  font-weight: 700;
  letter-spacing: -0.5px;
  color: var(--text-main);
  text-decoration: none;
}

.logo span {
  color: var(--primary);
}

.nav-links {
  display: flex;
  list-style: none;
  gap: 2rem;
  align-items: center;
}

.nav-links a {
  text-decoration: none;
  color: var(--text-muted);
  font-weight: 500;
  transition: color 0.2s ease;
  font-size: 0.95rem;
}

.nav-links a:hover {
  color: var(--primary);
}

.hamburger {
  display: none;
  background: none;
  border: none;
  font-size: 1.4rem;
  color: var(--text-main);
  cursor: pointer;
}

/* Sections Shared */
section {
  padding: 5rem 1.5rem;
  max-width: 1200px;
  margin: 0 auto;
}

.section-title {
  text-align: center;
  margin-bottom: 3.5rem;
}

.section-title h2 {
  font-size: 2.2rem;
  font-weight: 700;
  letter-spacing: -0.5px;
  margin-bottom: 0.5rem;
}

.section-title p {
  color: var(--text-muted);
  font-size: 1rem;
}

/* Hero Section */
.hero {
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: calc(85vh - 70px);
  gap: 3rem;
  padding-top: 2rem;
}

.hero-content {
  flex: 1;
}

.badge {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  background: rgba(37, 99, 235, 0.1);
  color: var(--primary);
  padding: 0.4rem 0.9rem;
  border-radius: 9999px;
  font-size: 0.85rem;
  font-weight: 600;
  margin-bottom: 1.25rem;
}

.hero-title {
  font-size: 3rem;
  line-height: 1.15;
  font-weight: 800;
  letter-spacing: -1px;
  margin-bottom: 1rem;
}

.hero-subtitle {
  font-size: 1.2rem;
  color: var(--text-muted);
  margin-bottom: 2rem;
  max-width: 520px;
}

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

.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.85rem 1.6rem;
  border-radius: 8px;
  font-weight: 600;
  font-size: 0.95rem;
  text-decoration: none;
  cursor: pointer;
  border: none;
  transition: all 0.2s ease;
}

.btn-primary {
  background-color: var(--primary);
  color: #ffffff;
}

.btn-primary:hover {
  background-color: var(--primary-hover);
  transform: translateY(-2px);
}

.btn-secondary {
  background-color: transparent;
  color: var(--text-main);
  border: 1px solid var(--border-color);
}

.btn-secondary:hover {
  background-color: var(--card-bg);
  border-color: var(--text-muted);
}

.hero-image-wrap {
  flex: 1;
  display: flex;
  justify-content: center;
}

.profile-frame {
  position: relative;
  width: 320px;
  height: 320px;
  border-radius: 50%;
  padding: 6px;
  background: linear-gradient(135deg, var(--primary), var(--accent));
  box-shadow: var(--shadow);
}

.profile-frame img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: top center;
  border-radius: 50%;
  border: 4px solid var(--card-bg);
}

/* About Section */
.about-grid {
  display: grid;
  grid-template-columns: 1fr 1.2fr;
  gap: 3.5rem;
  align-items: center;
}

.about-image {
  position: relative;
  border-radius: 16px;
  overflow: hidden;
  box-shadow: var(--shadow);
  max-height: 480px;
}

.about-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

.about-content h3 {
  font-size: 1.8rem;
  font-weight: 700;
  margin-bottom: 1rem;
}

.about-content p {
  color: var(--text-muted);
  margin-bottom: 1.25rem;
}

.info-list {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1rem;
  margin-top: 1.5rem;
}

.info-item {
  background: var(--card-bg);
  padding: 1rem;
  border-radius: 8px;
  border: 1px solid var(--border-color);
}

.info-item strong {
  display: block;
  font-size: 0.85rem;
  color: var(--text-muted);
  margin-bottom: 0.2rem;
}

.info-item span {
  font-weight: 600;
  font-size: 0.95rem;
}

/* Skills Section */
.skills-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 1.5rem;
}

.skill-card {
  background: var(--card-bg);
  border: 1px solid var(--border-color);
  border-radius: 12px;
  padding: 1.8rem;
  box-shadow: var(--shadow);
  transition: transform 0.2s ease, border-color 0.2s ease;
}

.skill-card:hover {
  transform: translateY(-4px);
  border-color: var(--primary);
}

.skill-icon {
  width: 48px;
  height: 48px;
  border-radius: 8px;
  background: rgba(37, 99, 235, 0.1);
  color: var(--primary);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.4rem;
  margin-bottom: 1.25rem;
}

.skill-card h4 {
  font-size: 1.15rem;
  font-weight: 600;
  margin-bottom: 0.5rem;
}

.skill-card p {
  font-size: 0.9rem;
  color: var(--text-muted);
}

/* Contact Section */
.contact-container {
  display: grid;
  grid-template-columns: 1fr 1.3fr;
  gap: 3rem;
  background: var(--card-bg);
  border: 1px solid var(--border-color);
  border-radius: 16px;
  padding: 2.5rem;
  box-shadow: var(--shadow);
}

.contact-info h3 {
  font-size: 1.6rem;
  margin-bottom: 1rem;
}

.contact-info p {
  color: var(--text-muted);
  margin-bottom: 2rem;
}

.contact-details {
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
}

.contact-detail-item {
  display: flex;
  align-items: center;
  gap: 1rem;
  color: var(--text-main);
  text-decoration: none;
}

.contact-detail-item i {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: rgba(37, 99, 235, 0.1);
  color: var(--primary);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.1rem;
}

/* Form Styles */
.form-group {
  margin-bottom: 1.25rem;
}

.form-group label {
  display: block;
  font-size: 0.85rem;
  font-weight: 600;
  margin-bottom: 0.4rem;
}

.form-group input,
.form-group textarea {
  width: 100%;
  padding: 0.8rem 1rem;
  border-radius: 8px;
  border: 1px solid var(--border-color);
  background: var(--bg-color);
  color: var(--text-main);
  outline: none;
  font-size: 0.95rem;
  transition: border-color 0.2s ease;
}

.form-group input:focus,
.form-group textarea:focus {
  border-color: var(--primary);
}

/* Floating WhatsApp */
.whatsapp-float {
  position: fixed;
  bottom: 25px;
  right: 25px;
  background-color: var(--whatsapp);
  color: white;
  width: 58px;
  height: 58px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 30px;
  box-shadow: 0 4px 15px rgba(0, 0, 0, 0.25);
  z-index: 1000;
  text-decoration: none;
  transition: all 0.3s ease;
}

.whatsapp-float:hover {
  background-color: var(--whatsapp-hover);
  transform: scale(1.08);
  color: white;
}

/* Footer */
footer {
  border-top: 1px solid var(--border-color);
  background: var(--card-bg);
  padding: 3rem 1.5rem 2rem;
  text-align: center;
  margin-top: 4rem;
}

.footer-socials {
  display: flex;
  justify-content: center;
  gap: 1.25rem;
  margin-bottom: 1.5rem;
}

.footer-socials a {
  width: 44px;
  height: 44px;
  border-radius: 50%;
  border: 1px solid var(--border-color);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-muted);
  font-size: 1.2rem;
  text-decoration: none;
  transition: all 0.2s ease;
}

.footer-socials a:hover {
  color: #ffffff;
  border-color: transparent;
}

.footer-socials a.yt:hover { background-color: #ff0000; }
.footer-socials a.ig:hover { background: radial-gradient(circle at 30% 107%, #fdf497 0%, #fdf497 5%, #fd5949 45%, #d6249f 60%, #285aeb 90%); }
.footer-socials a.fb:hover { background-color: #1877f2; }
.footer-socials a.wa:hover { background-color: var(--whatsapp); }

.copyright {
  color: var(--text-muted);
  font-size: 0.88rem;
}

/* Responsiveness */
@media (max-width: 900px) {
  .hero {
    flex-direction: column-reverse;
    text-align: center;
    gap: 2rem;
  }

  .hero-subtitle {
    margin: 0 auto 2rem auto;
  }

  .hero-actions {
    justify-content: center;
  }

  .profile-frame {
    width: 250px;
    height: 250px;
  }

  .about-grid,
  .contact-container {
    grid-template-columns: 1fr;
  }

  .about-image {
    max-height: 380px;
  }
}

@media (max-width: 768px) {
  .hamburger {
    display: block;
  }

  .nav-links {
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    flex-direction: column;
    background: var(--card-bg);
    border-bottom: 1px solid var(--border-color);
    padding: 1.5rem;
    gap: 1.2rem;
    display: none;
  }

  .nav-links.active {
    display: flex;
  }

  .hero-title {
    font-size: 2.2rem;
  }

  .info-list {
    grid-template-columns: 1fr;
  }
}