/* ============================================
   ENGINEER PORTFOLIO — Tech/Modern
   Colors: Navy #0a192f, Cyan #64ffda, Slate #8892b0
   Fonts: Inter, Fira Code (Monospace)
   ============================================ */

@import url('https://fonts.googleapis.com/css2?family=Fira+Code:wght@400;500&family=Inter:wght@400;500;600;700;800&display=swap');

:root {
  --bg-primary: #0a192f;
  --bg-secondary: #112240;
  --bg-card: #233554;
  --text-primary: #ccd6f6;
  --text-secondary: #8892b0;
  --accent-color: #64ffda;
  --accent-tint: rgba(100, 255, 218, 0.1);
  --font-main: 'Inter', sans-serif;
  --font-mono: 'Fira Code', monospace;
  --transition: all 0.25s cubic-bezier(0.645, 0.045, 0.355, 1);
  --max-width: 1000px;
  --radius: 4px;
}

[data-theme="light"] {
  --bg-primary: #f8f9fa;
  --bg-secondary: #ffffff;
  --bg-card: #e9ecef;
  --text-primary: #212529;
  --text-secondary: #495057;
  --accent-color: #0056b3;
  --accent-tint: rgba(0, 86, 179, 0.1);
}

*, *::before, *::after { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  font-family: var(--font-main);
  background: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.6;
  overflow-x: hidden;
  transition: background 0.3s ease, color 0.3s ease;
}
a { text-decoration: none; color: inherit; transition: var(--transition); }
ul { list-style: none; }
img { max-width: 100%; height: auto; display: block; border-radius: var(--radius); }
.container { max-width: var(--max-width); margin: 0 auto; padding: 0 24px; }

/* ── Navbar ── */
.navbar {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 1000;
  padding: 20px 0;
  background: rgba(10, 25, 47, 0.85);
  backdrop-filter: blur(10px);
  transition: var(--transition);
}
[data-theme="light"] .navbar { background: rgba(248, 249, 250, 0.9); }
.navbar.scrolled {
  padding: 15px 0;
  box-shadow: 0 10px 30px -10px rgba(2,12,27,0.7);
}
[data-theme="light"] .navbar.scrolled { box-shadow: 0 4px 20px rgba(0,0,0,0.05); }

.navbar .container { display: flex; justify-content: space-between; align-items: center; }
.nav-logo {
  font-family: var(--font-mono);
  font-size: 1.2rem;
  color: var(--accent-color);
  font-weight: 500;
}
.nav-links { display: flex; align-items: center; gap: 30px; }
.nav-links li {
  font-family: var(--font-mono);
  font-size: 0.85rem;
}
.nav-links a { color: var(--text-primary); }
.nav-links a:hover, .nav-links a.active { color: var(--accent-color); }
.nav-links span { color: var(--accent-color); margin-right: 5px; }

.nav-toggle {
  display: none;
  background: none; border: none; cursor: pointer; z-index: 1001;
}
.nav-toggle span {
  display: block; width: 25px; height: 2px;
  background: var(--accent-color); margin: 5px 0; transition: var(--transition);
}
.theme-toggle {
  background: none; border: none; cursor: pointer; color: var(--accent-color); font-size: 1.2rem;
}

/* ── Hero ── */
.hero {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  justify-content: center;
  padding-top: 80px;
}
.hero-mono {
  font-family: var(--font-mono);
  color: var(--accent-color);
  margin-bottom: 20px;
}
.hero h1 {
  font-size: clamp(2.5rem, 6vw, 4.5rem);
  font-weight: 700;
  line-height: 1.1;
  color: var(--text-primary);
  margin-bottom: 10px;
}
.hero h2 {
  font-size: clamp(2rem, 5vw, 4rem);
  font-weight: 700;
  line-height: 1.1;
  color: var(--text-secondary);
  margin-bottom: 20px;
}
.hero p {
  max-width: 540px;
  color: var(--text-secondary);
  font-size: 1.1rem;
  margin-bottom: 40px;
}
.btn {
  display: inline-block;
  padding: 15px 30px;
  background: transparent;
  color: var(--accent-color);
  border: 1px solid var(--accent-color);
  border-radius: var(--radius);
  font-family: var(--font-mono);
  font-size: 0.9rem;
  cursor: pointer;
  transition: var(--transition);
}
.btn:hover { background: var(--accent-tint); }
.btn-primary {
  background: var(--accent-color);
  color: var(--bg-primary);
}
.btn-primary:hover {
  background: transparent;
  color: var(--accent-color);
}

/* ── Sections ── */
.section { padding: 100px 0; }
.section-title {
  display: flex;
  align-items: center;
  font-size: 2rem;
  margin-bottom: 40px;
  font-weight: 600;
}
.section-title::before {
  content: '>';
  color: var(--accent-color);
  font-family: var(--font-mono);
  margin-right: 15px;
  font-size: 1.5rem;
}
.section-title::after {
  content: '';
  display: block;
  flex-grow: 1;
  height: 1px;
  background: var(--bg-card);
  margin-left: 20px;
}

/* ── About ── */
.about-content {
  display: grid;
  grid-template-columns: 3fr 2fr;
  gap: 50px;
}
.about-text { color: var(--text-secondary); }
.about-text p { margin-bottom: 15px; }
.skills-list {
  display: grid;
  grid-template-columns: repeat(2, minmax(140px, 200px));
  gap: 10px;
  margin-top: 20px;
  font-family: var(--font-mono);
  font-size: 0.85rem;
}
.skills-list li { position: relative; padding-left: 20px; }
.skills-list li::before {
  content: '▹';
  position: absolute;
  left: 0;
  color: var(--accent-color);
}

.about-pic { position: relative; }
.about-pic-wrapper {
  position: relative;
  border-radius: var(--radius);
  background: var(--accent-color);
  transition: var(--transition);
}
.about-pic-wrapper img {
  filter: grayscale(100%) contrast(1);
  mix-blend-mode: multiply;
  transition: var(--transition);
}
.about-pic-wrapper:hover img { filter: none; mix-blend-mode: normal; }
.about-pic-wrapper::after {
  content: '';
  position: absolute;
  top: 15px; left: 15px;
  width: 100%; height: 100%;
  border: 2px solid var(--accent-color);
  border-radius: var(--radius);
  z-index: -1;
  transition: var(--transition);
}
.about-pic-wrapper:hover::after { top: 10px; left: 10px; }
[data-theme="light"] .about-pic-wrapper img { filter: none; mix-blend-mode: normal; }

/* ── Projects Grid ── */
.projects-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 20px;
}
.project-card {
  background: var(--bg-secondary);
  border-radius: var(--radius);
  padding: 30px 25px;
  transition: var(--transition);
  display: flex;
  flex-direction: column;
}
.project-card:hover { transform: translateY(-7px); box-shadow: 0 10px 30px -15px rgba(2,12,27,0.7); }
[data-theme="light"] .project-card:hover { box-shadow: 0 10px 20px rgba(0,0,0,0.1); }
.project-top {
  display: flex; justify-content: space-between; align-items: center; margin-bottom: 20px;
}
.folder-icon { font-size: 2.5rem; color: var(--accent-color); }
.project-links a { color: var(--text-secondary); margin-left: 10px; font-size: 1.2rem; }
.project-links a:hover { color: var(--accent-color); }
.project-title { font-size: 1.3rem; margin-bottom: 10px; }
.project-desc { color: var(--text-secondary); font-size: 0.9rem; flex-grow: 1; }
.project-tech {
  display: flex; flex-wrap: wrap; gap: 15px; margin-top: 20px;
  font-family: var(--font-mono); font-size: 0.75rem; color: var(--text-secondary);
}

/* ── Contact Form ── */
.contact-wrap { text-align: center; max-width: 600px; margin: 0 auto; }
.contact-wrap p { color: var(--text-secondary); margin-bottom: 40px; }
.form-group { margin-bottom: 20px; text-align: left; }
.form-group input, .form-group textarea {
  width: 100%; padding: 15px;
  background: var(--bg-secondary);
  border: 1px solid var(--bg-card);
  border-radius: var(--radius);
  color: var(--text-primary);
  font-family: var(--font-main);
  transition: var(--transition);
}
.form-group input:focus, .form-group textarea:focus {
  outline: none; border-color: var(--accent-color);
}
.form-group textarea { min-height: 150px; resize: vertical; }
.btn-submit { width: 100%; padding: 15px; }
.form-status { margin-bottom: 20px; padding: 15px; border-radius: var(--radius); display: none; }
.form-status.success { background: var(--accent-tint); color: var(--accent-color); border: 1px solid var(--accent-color); }
.form-status.error { background: rgba(255,100,100,0.1); color: #ff6b6b; border: 1px solid #ff6b6b; }

/* ── Footer ── */
.footer { padding: 30px 0; text-align: center; font-family: var(--font-mono); font-size: 0.8rem; color: var(--text-secondary); }

/* Animations */
.reveal { opacity: 0; transform: translateY(30px); transition: var(--transition); }
.reveal.active { opacity: 1; transform: translateY(0); }

/* Responsive */
@media (max-width: 768px) {
  .nav-toggle { display: block; }
  .nav-links {
    position: fixed; top: 0; right: -100%; width: 70vw; height: 100vh;
    background: var(--bg-secondary);
    flex-direction: column; justify-content: center;
    box-shadow: -10px 0 30px -15px rgba(2,12,27,0.7);
    transition: var(--transition);
  }
  .nav-links.active { right: 0; }
  .about-content { grid-template-columns: 1fr; }
  .about-pic { max-width: 300px; margin: 0 auto; }
}