/* Reset & base */
* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}
:root {
  --primary: #00bcd4;
  --secondary: #22223b;
  --bg: #f8f9fa;
  --text: #222;
  --card-bg: rgba(255, 255, 255, 0.85);
  --glass: rgba(255, 255, 255, 0.6);
  --shadow: 0 8px 32px 0 rgba(31, 38, 135, 0.15);
  --sidebar-bg: #fff;
  --sidebar-text: #222;
  --sidebar-border: #e0e0e0;
  --transition: 0.3s cubic-bezier(0.4, 2, 0.6, 1);
}
body.dark {
  --primary: #00bcd4;
  --secondary: #22223b;
  --bg: #181a1b;
  --text: #f8f9fa;
  --card-bg: rgba(34, 34, 59, 0.85);
  --glass: rgba(34, 34, 59, 0.6);
  --shadow: 0 8px 32px 0 rgba(0, 188, 212, 0.12);
  --sidebar-bg: #23243a;
  --sidebar-text: #f8f9fa;
  --sidebar-border: #33344d;
}
body {
  font-family: "Montserrat", Arial, sans-serif;
  background: var(--bg);
  color: var(--text);
  min-height: 100vh;
  transition: background var(--transition), color var(--transition);
  display: flex;
}

/* Sidebar */
.sidebar {
  position: fixed;
  left: 0;
  top: 0;
  bottom: 0;
  width: 270px;
  background: var(--sidebar-bg);
  color: var(--sidebar-text);
  border-right: 1px solid var(--sidebar-border);
  box-shadow: var(--shadow);
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: 2.5rem 1rem 1rem 1rem;
  z-index: 10;
  transition: background var(--transition), color var(--transition);
}
.avatar-container {
  margin-bottom: 1.5rem;
}
.avatar {
  width: 120px;
  height: 120px;
  border-radius: 50%;
  border: 4px solid var(--primary);
  box-shadow: 0 2px 12px rgba(0, 188, 212, 0.12);
  object-fit: cover;
}
.sidebar h1 {
  font-size: 2rem;
  margin: 0.5rem 0 0.2rem 0;
  font-weight: 700;
  letter-spacing: 1px;
}
.sidebar .role {
  font-size: 1.1rem;
  color: var(--primary);
  margin-bottom: 1.5rem;
}
.sidebar nav ul {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 1.2rem;
  margin-bottom: 2rem;
}
.sidebar nav a {
  color: var(--sidebar-text);
  text-decoration: none;
  font-weight: 600;
  font-size: 1.1rem;
  letter-spacing: 0.5px;
  transition: color var(--transition);
  position: relative;
}
.sidebar nav a.active,
.sidebar nav a:hover {
  color: var(--primary);
}
.sidebar nav a.active::after,
.sidebar nav a:hover::after {
  content: "";
  display: block;
  width: 24px;
  height: 2px;
  background: var(--primary);
  border-radius: 2px;
  margin: 4px auto 0 auto;
}
.social-links {
  display: flex;
  gap: 1.2rem;
  margin-top: auto;
}
.social-links img {
  width: 28px;
  height: 28px;
  filter: grayscale(0.2);
  transition: filter var(--transition), transform var(--transition);
}
.social-links a:hover img {
  filter: grayscale(0) drop-shadow(0 0 6px var(--primary));
  transform: scale(1.15) rotate(-8deg);
}

/* Main content */
main {
  margin-left: 270px;
  width: 100%;
  min-height: 100vh;
  background: linear-gradient(120deg, var(--bg) 60%, var(--primary) 200%);
  transition: background var(--transition);
}
.section {
  max-width: 900px;
  margin: 0 auto;
  padding: 4rem 2rem 2rem 2rem;
}

/* Hero Section */
.hero-section {
  min-height: 70vh;
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  overflow: hidden;
  padding: 0 2rem;
}
.hero-content {
  z-index: 2;
  text-align: left;
  max-width: 600px;
}
.animated-text {
  font-size: 2.6rem;
  font-weight: 700;
  line-height: 1.2;
  margin-bottom: 1.2rem;
  color: var(--secondary);
  animation: fadeInUp 1.2s cubic-bezier(0.4, 2, 0.6, 1);
}
.animated-text .highlight {
  color: var(--primary);
  background: linear-gradient(90deg, var(--secondary) 40%, #fff0 100%);
  border-radius: 6px;
  padding: 0 0.2em;
}
.hero-desc {
  font-size: 1.2rem;
  color: var(--primary);
  margin-bottom: 2rem;
  font-family: "Fira Mono", monospace;
}
.cta-btn {
  display: inline-block;
  background: var(--primary);
  color: #fff;
  font-weight: 700;
  padding: 0.9rem 2.2rem;
  border-radius: 30px;
  font-size: 1.1rem;
  text-decoration: none;
  box-shadow: 0 4px 24px rgba(0, 188, 212, 0.13);
  transition: background var(--transition), transform var(--transition);
  margin-top: 1rem;
}
.cta-btn:hover {
  background: #0097a7;
  transform: scale(1.07) translateY(-2px);
}
.hero-bg {
  position: absolute;
  right: -120px;
  top: -80px;
  width: 600px;
  height: 600px;
  background: radial-gradient(circle at 60% 40%, var(--primary) 0%, #fff0 80%);
  filter: blur(60px) opacity(0.7);
  z-index: 1;
  pointer-events: none;
}

/* About */
#about p {
  font-size: 1.15rem;
  color: var(--secondary);
  margin-top: 1rem;
  line-height: 1.7;
}

/* Skills */
.skills-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
  gap: 1.5rem;
  margin-top: 2rem;
}
.skill-card {
  background: var(--glass);
  color: var(--primary);
  font-weight: 700;
  font-size: 1.1rem;
  border-radius: 18px;
  padding: 1.1rem 0.5rem;
  text-align: center;
  box-shadow: var(--shadow);
  backdrop-filter: blur(6px);
  transition: transform var(--transition), box-shadow var(--transition);
}
.skill-card:hover {
  transform: scale(1.07) rotate(-2deg);
  box-shadow: 0 8px 32px 0 rgba(0, 188, 212, 0.18);
}

/* Projects */
.projects-fancy-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: 2.5rem;
  margin-top: 2.5rem;
}
.project-fancy-card {
  background: var(--card-bg);
  border-radius: 18px;
  box-shadow: var(--shadow);
  overflow: hidden;
  display: flex;
  flex-direction: column;
  transition: transform var(--transition), box-shadow var(--transition);
  position: relative;
}
.project-fancy-card img {
  width: 100%;
  height: 180px;
  object-fit: cover;
  transition: filter var(--transition), transform var(--transition);
}
.project-fancy-card:hover img {
  filter: brightness(0.85) blur(1px);
  transform: scale(1.04);
}
.project-info {
  padding: 1.3rem 1.2rem 1.2rem 1.2rem;
  display: flex;
  flex-direction: column;
  gap: 0.7rem;
}
.project-info h3 {
  margin: 0;
  color: var(--secondary);
  font-size: 1.3rem;
}
.project-info p {
  color: var(--text);
  font-size: 1.05rem;
}
.tags {
  display: flex;
  gap: 0.7rem;
  flex-wrap: wrap;
  margin-bottom: 0.5rem;
}
.tags span {
  background: var(--primary);
  color: #fff;
  border-radius: 12px;
  padding: 0.2rem 0.8rem;
  font-size: 0.95rem;
  font-family: "Fira Mono", monospace;
  font-weight: 600;
}
.project-link {
  align-self: flex-start;
  color: var(--primary);
  font-weight: 700;
  text-decoration: none;
  margin-top: 0.5rem;
  transition: color var(--transition);
}
.project-link:hover {
  color: #0097a7;
  text-decoration: underline;
}

/* Contact */
.contact-form {
  display: flex;
  flex-direction: column;
  gap: 1.2rem;
  margin-top: 2rem;
  max-width: 400px;
}
.contact-form input,
.contact-form textarea {
  padding: 0.9rem 1rem;
  border-radius: 10px;
  border: 1px solid #b0bec5;
  font-size: 1rem;
  font-family: inherit;
  background: var(--glass);
  color: var(--text);
  transition: border var(--transition), background var(--transition);
}
.contact-form input:focus,
.contact-form textarea:focus {
  border: 1.5px solid var(--primary);
  outline: none;
  background: #e0f7fa33;
}
.contact-form button {
  background: var(--primary);
  color: #fff;
  font-weight: 700;
  border: none;
  border-radius: 10px;
  padding: 0.9rem 0;
  font-size: 1.1rem;
  cursor: pointer;
  transition: background var(--transition), transform var(--transition);
}
.contact-form button:hover {
  background: #0097a7;
  transform: scale(1.04);
}

/* Footer */
footer {
  text-align: center;
  color: var(--secondary);
  font-size: 1rem;
  padding: 2rem 0 1rem 0;
  margin-top: 2rem;
}

/* Theme Toggle */
.theme-toggle {
  position: fixed;
  top: 1.5rem;
  right: 2.2rem;
  background: var(--glass);
  border-radius: 50%;
  box-shadow: var(--shadow);
  width: 48px;
  height: 48px;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  z-index: 100;
  transition: background var(--transition);
}
#theme-icon {
  font-size: 1.7rem;
  color: var(--primary);
  transition: color var(--transition);
}

/* Animations */
@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(40px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* Responsive */
@media (max-width: 900px) {
  .sidebar {
    width: 100vw;
    height: auto;
    position: static;
    flex-direction: row;
    justify-content: space-between;
    padding: 1.2rem 2rem;
    border-right: none;
    border-bottom: 1px solid var(--sidebar-border);
  }
  .avatar-container {
    margin-bottom: 0;
  }
  .sidebar nav ul {
    flex-direction: row;
    gap: 1.2rem;
    margin-bottom: 0;
  }
  .social-links {
    margin-top: 0;
  }
  main {
    margin-left: 0;
  }
}
@media (max-width: 600px) {
  .section,
  .hero-section {
    padding: 2rem 0.5rem;
  }
  .sidebar {
    flex-direction: column;
    align-items: center;
    padding: 1rem 0.5rem;
  }
  .sidebar nav ul {
    flex-direction: column;
    gap: 0.7rem;
  }
  .projects-fancy-grid {
    grid-template-columns: 1fr;
  }
  .skills-grid {
    grid-template-columns: 1fr 1fr;
  }
}