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

:root {
  --bg: #ffffff;
  --bg-alt: #f8f9fa;
  --text: #1a1a2e;
  --text-light: #6c757d;
  --primary: #6c63ff;
  --primary-dark: #5a52d5;
  --card-bg: #ffffff;
  --shadow: 0 5px 20px rgba(0,0,0,0.08);
  --border: #e9ecef;
  --nav-bg: rgba(255,255,255,0.95);
}

[data-theme="dark"] {
  --bg: #0f0f1a;
  --bg-alt: #1a1a2e;
  --text: #e4e4e7;
  --text-light: #a1a1aa;
  --primary: #7c73ff;
  --primary-dark: #6c63ff;
  --card-bg: #1e1e32;
  --shadow: 0 5px 20px rgba(0,0,0,0.3);
  --border: #2d2d44;
  --nav-bg: rgba(15,15,26,0.95);
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
  transition: background 0.3s, color 0.3s;
}

.container {
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 20px;
}

section {
  padding: 100px 0;
}

/* Navbar */
.navbar {
  position: fixed;
  top: 0;
  width: 100%;
  background: var(--nav-bg);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--border);
  z-index: 1000;
  transition: background 0.3s;
}

.navbar .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 70px;
}

.logo {
  font-size: 1.5rem;
  font-weight: 800;
  color: var(--primary);
  text-decoration: none;
}

.nav-links {
  display: flex;
  list-style: none;
  gap: 30px;
}

.nav-links a {
  text-decoration: none;
  color: var(--text);
  font-weight: 500;
  font-size: 0.95rem;
  transition: color 0.3s;
}

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

.theme-toggle, .hamburger {
  background: none;
  border: none;
  color: var(--text);
  font-size: 1.2rem;
  cursor: pointer;
  padding: 8px;
  border-radius: 8px;
  transition: background 0.3s;
}

.theme-toggle:hover, .hamburger:hover {
  background: var(--bg-alt);
}

.hamburger {
  display: none;
}

/* Hero */
.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  text-align: center;
  padding-top: 70px;
}

.hero-greeting {
  font-size: 1.1rem;
  color: var(--primary);
  font-weight: 600;
  letter-spacing: 2px;
  text-transform: uppercase;
  margin-bottom: 10px;
}

.hero-name {
  font-size: 3.5rem;
  font-weight: 800;
  margin-bottom: 10px;
  background: linear-gradient(135deg, var(--primary), #ff6584);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-role {
  font-size: 1.4rem;
  color: var(--text-light);
  margin-bottom: 20px;
  min-height: 2em;
}

.cursor {
  animation: blink 0.7s infinite;
  color: var(--primary);
}

@keyframes blink {
  50% { opacity: 0; }
}

.hero-desc {
  font-size: 1.05rem;
  color: var(--text-light);
  max-width: 500px;
  margin: 0 auto 30px;
}

.hero-buttons {
  display: flex;
  gap: 15px;
  justify-content: center;
  margin-bottom: 30px;
  flex-wrap: wrap;
}

.btn {
  display: inline-block;
  padding: 12px 30px;
  border-radius: 8px;
  font-weight: 600;
  text-decoration: none;
  transition: all 0.3s;
  border: none;
  cursor: pointer;
  font-size: 0.95rem;
}

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

.btn-primary:hover {
  background: var(--primary-dark);
  transform: translateY(-2px);
  box-shadow: 0 5px 15px rgba(108,99,255,0.4);
}

.btn-secondary {
  background: transparent;
  color: var(--primary);
  border: 2px solid var(--primary);
}

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

.hero-socials {
  display: flex;
  gap: 20px;
  justify-content: center;
}

.hero-socials a {
  color: var(--text-light);
  font-size: 1.3rem;
  transition: all 0.3s;
}

.hero-socials a:hover {
  color: var(--primary);
  transform: translateY(-3px);
}

/* Section title */
.section-title {
  font-size: 2.2rem;
  font-weight: 800;
  text-align: center;
  margin-bottom: 60px;
  position: relative;
}

.section-title::after {
  content: '';
  position: absolute;
  bottom: -10px;
  left: 50%;
  transform: translateX(-50%);
  width: 60px;
  height: 4px;
  background: var(--primary);
  border-radius: 2px;
}

/* About */
.about {
  background: var(--bg-alt);
}

.about-content {
  display: grid;
  grid-template-columns: 1fr 1.5fr;
  gap: 60px;
  align-items: center;
}

.about-img-placeholder {
  width: 100%;
  aspect-ratio: 1;
  max-width: 350px;
  margin: 0 auto;
  border-radius: 20px;
  background: var(--primary);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 5rem;
  color: #fff;
  box-shadow: 0 20px 40px rgba(108,99,255,0.3);
}

.about-text h3 {
  font-size: 1.6rem;
  margin-bottom: 20px;
}

.about-text p {
  color: var(--text-light);
  margin-bottom: 15px;
}

.about-stats {
  display: flex;
  gap: 40px;
  margin-top: 30px;
}

.stat {
  text-align: center;
}

.stat-number {
  display: block;
  font-size: 2rem;
  font-weight: 800;
  color: var(--primary);
}

.stat-label {
  color: var(--text-light);
  font-size: 0.9rem;
}

/* Skills */
.skills-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
  gap: 25px;
}

.skill-card {
  background: var(--card-bg);
  border-radius: 16px;
  padding: 30px 20px;
  text-align: center;
  box-shadow: var(--shadow);
  border: 1px solid var(--border);
  transition: transform 0.3s;
}

.skill-card:hover {
  transform: translateY(-5px);
}

.skill-card i {
  font-size: 2.5rem;
  margin-bottom: 15px;
  color: var(--primary);
}

.skill-card h4 {
  margin-bottom: 15px;
  font-size: 1rem;
}

.progress-bar {
  height: 6px;
  background: var(--bg-alt);
  border-radius: 3px;
  overflow: hidden;
}

.progress {
  height: 100%;
  background: linear-gradient(90deg, var(--primary), #ff6584);
  border-radius: 3px;
  transition: width 0.8s ease;
}

/* Projects */
.projects {
  background: var(--bg-alt);
}

.projects-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 30px;
}

.project-card {
  background: var(--card-bg);
  border-radius: 16px;
  overflow: hidden;
  box-shadow: var(--shadow);
  border: 1px solid var(--border);
  transition: transform 0.3s;
}

.project-card:hover {
  transform: translateY(-5px);
}

.project-img {
  height: 200px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 3.5rem;
  color: var(--primary);
}

.project-info {
  padding: 25px;
}

.project-info h3 {
  font-size: 1.2rem;
  margin-bottom: 10px;
}

.project-info p {
  color: var(--text-light);
  font-size: 0.9rem;
  margin-bottom: 15px;
}

.project-tags {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
  margin-bottom: 20px;
}

.project-tags span {
  background: var(--bg-alt);
  padding: 4px 12px;
  border-radius: 20px;
  font-size: 0.8rem;
  font-weight: 500;
  color: var(--primary);
}

.project-links {
  display: flex;
  gap: 20px;
}

.project-links a {
  text-decoration: none;
  color: var(--text);
  font-size: 0.9rem;
  font-weight: 500;
  transition: color 0.3s;
}

.project-links a i {
  margin-right: 5px;
}

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

/* Contact */
.contact-content {
  display: grid;
  grid-template-columns: 1fr 1.5fr;
  gap: 60px;
}

.contact-item {
  display: flex;
  gap: 20px;
  align-items: flex-start;
  margin-bottom: 30px;
}

.contact-item i {
  font-size: 1.5rem;
  color: var(--primary);
  width: 50px;
  height: 50px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--bg-alt);
  border-radius: 12px;
  flex-shrink: 0;
}

.contact-item h4 {
  font-size: 1rem;
  margin-bottom: 5px;
}

.contact-item p {
  color: var(--text-light);
}

.contact-form {
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.contact-form input,
.contact-form textarea {
  padding: 15px;
  border-radius: 10px;
  border: 1px solid var(--border);
  background: var(--bg);
  color: var(--text);
  font-size: 0.95rem;
  font-family: inherit;
  transition: border 0.3s;
}

.contact-form input:focus,
.contact-form textarea:focus {
  outline: none;
  border-color: var(--primary);
}

.contact-form button {
  align-self: flex-start;
}

.form-options {
  display: flex;
  gap: 15px;
  flex-wrap: wrap;
}

.btn-whatsapp {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 12px 30px;
  border-radius: 8px;
  font-weight: 600;
  text-decoration: none;
  border: none;
  cursor: pointer;
  font-size: 0.95rem;
  background: #25D366;
  color: #fff;
  transition: all 0.3s;
}

.btn-whatsapp:hover {
  background: #1ebe5c;
  transform: translateY(-2px);
  box-shadow: 0 5px 15px rgba(37,211,102,0.4);
}

/* WhatsApp floating button */
.whatsapp-float {
  position: fixed;
  bottom: 25px;
  right: 25px;
  width: 56px;
  height: 56px;
  background: #25D366;
  color: #fff;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.6rem;
  box-shadow: 0 4px 15px rgba(37,211,102,0.4);
  z-index: 999;
  transition: all 0.3s;
  text-decoration: none;
}

.whatsapp-float:hover {
  transform: scale(1.1);
  box-shadow: 0 6px 25px rgba(37,211,102,0.5);
  color: #fff;
}

/* Footer */
.footer {
  text-align: center;
  padding: 30px 0;
  border-top: 1px solid var(--border);
  color: var(--text-light);
  font-size: 0.9rem;
}

/* Scroll animations */
.fade-in {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

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

/* Responsive */
@media (max-width: 768px) {
  .hero-name {
    font-size: 2.5rem;
  }

  .hero-role {
    font-size: 1.1rem;
  }

  .about-content,
  .contact-content {
    grid-template-columns: 1fr;
    gap: 40px;
  }

  .about-text {
    text-align: center;
  }

  .about-stats {
    justify-content: center;
  }

  .nav-links {
    display: none;
    position: absolute;
    top: 70px;
    left: 0;
    width: 100%;
    background: var(--nav-bg);
    flex-direction: column;
    padding: 20px;
    gap: 15px;
    border-bottom: 1px solid var(--border);
  }

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

  .hamburger {
    display: block;
  }

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

  section {
    padding: 70px 0;
  }
}