:root {
  --bg-primary: #0f172a;
  --bg-secondary: #020617;
  --bg-surface: #1e293b;
  --bg-surface-hover: #334155;
  --text-primary: #f8fafc;
  --text-secondary: #94a3b8;
  --accent-primary: #38bdf8;
  --accent-secondary: #818cf8;
  --border-color: rgba(255, 255, 255, 0.08);
  --shadow-sm: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -2px rgba(0, 0, 0, 0.1);
  --shadow-md: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -4px rgba(0, 0, 0, 0.1);
  --shadow-lg: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 8px 10px -6px rgba(0, 0, 0, 0.1);
  --shadow-glow: 0 0 25px rgba(56, 189, 248, 0.3);
}

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
  font-family: 'Outfit', sans-serif;
}

html {
  scroll-behavior: smooth;
}

body {
  background: var(--bg-primary);
  color: var(--text-primary);
  overflow-x: hidden;
  line-height: 1.6;
}

/* Typography & General */
h1,
h2,
h3,
h4,
h5,
h6 {
  font-weight: 700;
  letter-spacing: -0.02em;
}

h2 {
  font-size: 2.5rem;
  margin-bottom: 0.5rem;
  color: var(--text-primary);
}

.title-underline {
  height: 4px;
  width: 60px;
  background: linear-gradient(90deg, var(--accent-primary), var(--accent-secondary));
  margin: 0 auto 40px auto;
  border-radius: 2px;
}

.highlight {
  background: linear-gradient(135deg, var(--accent-primary), var(--accent-secondary));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

/* Header & Nav */
header {
  position: fixed;
  width: 100%;
  padding: 20px 40px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  background: rgba(15, 23, 42, 0.7);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--border-color);
  z-index: 1000;
}

header h3 {
  font-size: 1.5rem;
  font-weight: 800;
  letter-spacing: -0.5px;
}

nav a {
  margin: 0 15px;
  color: var(--text-secondary);
  text-decoration: none;
  font-weight: 500;
  transition: all 0.3s ease;
  font-size: 0.95rem;
}

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

/* Sections */
section {
  min-height: 100vh;
  display: flex;
  justify-content: center;
  align-items: center;
  flex-direction: column;
  padding: 100px 40px 60px;
}

#home,
#projects {
  background: linear-gradient(135deg, var(--bg-primary), var(--bg-secondary));
}

#about,
#certificates,
#contact {
  background: radial-gradient(circle at top right, #1e1b4b 0%, var(--bg-primary) 50%, var(--bg-secondary) 100%);
}

/* Home */
.home-container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 85%;
  max-width: 1200px;
  gap: 40px;
}

.home-container h1 {
  font-size: 3.5rem;
  line-height: 1.2;
  margin-bottom: 20px;
}

.subtitle {
  font-size: 1.1rem;
  color: var(--text-secondary);
  max-width: 500px;
  margin-bottom: 20px;
}

.image-circle {
  width: 320px;
  height: 320px;
  border-radius: 50%;
  overflow: hidden;
  box-shadow: var(--shadow-glow);
  flex-shrink: 0;
  position: relative;
}

.image-circle::after {
  content: '';
  position: absolute;
  inset: 0;
  border-radius: 50%;
  box-shadow: inset 0 0 20px rgba(0, 0, 0, 0.5);
  pointer-events: none;
}

.image-circle img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

/* Buttons */
.btn {
  display: inline-block;
  padding: 12px 24px;
  border-radius: 8px;
  text-decoration: none;
  font-weight: 600;
  font-size: 0.95rem;
  transition: all 0.3s ease;
  cursor: pointer;
  border: none;
  text-align: center;
}

.btn-primary {
  background: linear-gradient(135deg, var(--accent-primary), var(--accent-secondary));
  color: #fff;
  box-shadow: 0 4px 15px rgba(56, 189, 248, 0.4);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(56, 189, 248, 0.6);
}

.btn-outline {
  background: transparent;
  color: var(--text-primary);
  border: 1px solid var(--border-color);
  padding: 10px 20px;
}

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

.btn-block {
  width: 100%;
}

.mt-4 {
  margin-top: 1.5rem;
}

/* About & Certificates */
.about-container {
  text-align: center;
  max-width: 1200px;
  width: 100%;
}

.about-text {
  color: var(--text-secondary);
  font-size: 1.15rem;
  max-width: 800px;
  margin: 0 auto 50px auto;
}

.about-cards {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 30px;
  margin-top: 20px;
}

.about-card {
  padding: 35px 25px;
  border-radius: 20px;
  background-color: #020617;
  text-align: center;
  transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  min-height: 280px;
  box-shadow: 0px 0px 4px 1px rgb(0, 0, 0);
}

.about-card .icon-wrapper svg {
  width: 44px;
  height: 44px;
  margin: 0 auto 15px auto;
  color: var(--accent-primary);
  filter: drop-shadow(0 0 8px rgba(56, 189, 248, 0.4));
  transition: transform 0.3s ease;
}

.about-card h3 {
  font-size: 1.3rem;
  margin-bottom: 10px;
}

.about-card p {
  color: var(--text-secondary);
  font-size: 0.95rem;
  margin-bottom: 25px;
  flex-grow: 1;
}

.about-card:hover {
  box-shadow: 2px 2px 10px blue;
}

.about-card .btn {
  background: rgba(255, 255, 255, 0.05);
  color: var(--text-primary);
  width: 100%;
}

.about-card:hover .btn {
  background: var(--accent-primary);
  color: var(--bg-primary);
}

/* Projects */
.projects-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: 35px;
  margin-top: 20px;
}

.project-card {
  background: var(--bg-surface);
  border-radius: 20px;
  overflow: hidden;
  border: 1px solid var(--border-color);
  transition: all 0.4s ease;
  text-align: left;
}

.project-card:hover {
  transform: translateY(-8px);
  box-shadow: var(--shadow-lg);
  border-color: var(--accent-secondary);
}

.project-image {
  width: 100%;
  height: 220px;
  overflow: hidden;
}

.project-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.6s ease;
}

.project-card:hover .project-image img {
  transform: scale(1.08);
}

.project-content {
  padding: 25px;
}

.project-content h3 {
  font-size: 1.4rem;
  margin-bottom: 10px;
}

.project-content p {
  color: var(--text-secondary);
  font-size: 0.95rem;
  margin-bottom: 25px;
}

/* Contact Section */
.contact-container {
  max-width: 600px;
  width: 100%;
  text-align: center;
}

.contact-form {

  background-color: #020617;
  padding: 40px;
  border-radius: 24px;
  box-shadow: 0px 0px 4px 1px rgb(0, 0, 0);
}

.input-group {
  margin-bottom: 20px;
}

.contact-form input,
.contact-form textarea {
  width: 100%;
  padding: 16px 20px;
  background-color: #020617;
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: 12px;
  color: var(--text-primary);
  font-size: 1rem;
  font-family: inherit;
  transition: all 0.3s ease;
}

.contact-form input:focus,
.contact-form textarea:focus {
  outline: none;
  background: rgba(0, 0, 0, 0.3);
  box-shadow: 0 0 0 3px rgba(56, 189, 248, 0.15);
}

.contact-form textarea {
  resize: vertical;
  min-height: 120px;
}

/* Footer */
footer {
  background: var(--bg-secondary);
  text-align: center;
  padding: 30px;
  border-top: 1px solid var(--border-color);
  color: var(--text-secondary);
}

/* Media Queries */
@media (max-width: 900px) {
  .home-container {
    flex-direction: column-reverse;
    text-align: center;
  }

  .home-container h1 {
    font-size: 2.8rem;
  }

  .subtitle {
    margin: 0 auto 20px auto;
  }

  .image-circle {
    width: 260px;
    height: 260px;
    margin-bottom: 30px;
  }

  header {
    padding: 15px 20px;
  }

  nav a {
    margin: 0 8px;
    font-size: 0.9rem;
  }
}

@media (max-width: 600px) {
  nav {
    display: none;
  }

  .home-container h1 {
    font-size: 2.2rem;
  }

  section {
    padding: 80px 20px 40px;
  }
}