:root {
  --bg-deep: #13242E;
  --bg-surface: #1a2f3c;
  --primary: #61B909;
  --primary-dark: #009434;
  --text-bright: #FDFDFD;
  --text-soft: #FFFEFF;
  --card-bg: rgba(255, 255, 255, 0.05);
  --card-border: rgba(255, 255, 255, 0.08);
  --glow: rgba(97, 185, 9, 0.2);
  --shadow-sm: 0 12px 28px rgba(0,0,0,0.3);
  --navbar-blur: rgba(19, 36, 46, 0.85);
  --transition: all 0.25s cubic-bezier(0.2,0,0,1);
}

[data-theme="light"] {
  --bg-deep: #FDFDFD;
  --bg-surface: #ffffff;
  --primary: #009434;
  --primary-dark: #006622;
  --text-bright: #13242E;
  --text-soft: #1a2f3c;
  --card-bg: rgba(0, 0, 0, 0.02);
  --card-border: rgba(0, 0, 0, 0.06);
  --glow: rgba(0, 148, 52, 0.15);
  --shadow-sm: 0 8px 20px rgba(0,0,0,0.08);
  --navbar-blur: rgba(253, 253, 253, 0.8);
}

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

body {
  font-family: 'Inter', sans-serif;
  background-color: var(--bg-deep);
  color: var(--text-bright);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  transition: background-color 0.3s ease, color 0.2s ease;
}

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 28px;
}

h1, h2, h3 {
  font-weight: 650;
  letter-spacing: -0.02em;
  color: var(--text-soft);
}
.highlight { color: var(--primary); }
a { text-decoration: none; color: inherit; }

/* ----- Logo with Image (round) ----- */
.logo-wrapper {
  display: flex;
  align-items: center;
  gap: 12px;
}
.logo-image {
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--primary), var(--primary-dark));
  display: flex;
  align-items: center;
  justify-content: center;
  color: white;
  font-size: 1.5rem;
  box-shadow: 0 6px 12px var(--glow);
  transition: var(--transition);
}
.logo-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  border-radius: 50%;
}
.logo-text {
  font-size: 1.8rem;
  font-weight: 700;
  letter-spacing: -0.03em;
  color: var(--text-soft);
}
.logo-text .dot { color: var(--primary); }
.logo-wrapper.small .logo-image { width: 36px; height: 36px; font-size: 1.2rem; }
.logo-wrapper.small .logo-text { font-size: 1.4rem; }

/* ----- Theme Toggle ----- */
.theme-toggle {
  background: transparent;
  border: 1px solid var(--card-border);
  color: var(--text-bright);
  width: 44px; height: 44px;
  border-radius: 40px;
  display: flex; align-items: center; justify-content: center;
  cursor: pointer; transition: var(--transition);
}
.theme-toggle:hover { background: var(--primary); color: var(--bg-deep); border-color: var(--primary); }
.theme-toggle i { font-size: 1.3rem; }

/* ----- Navbar ----- */
.navbar {
  padding: 18px 0;
  backdrop-filter: blur(12px);
  background: var(--navbar-blur);
  border-bottom: 1px solid var(--card-border);
  position: sticky; top: 0; z-index: 100;
}
.nav-container {
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.nav-links { display: flex; gap: 36px; align-items: center; }
.nav-item {
  font-weight: 500; opacity: 0.8; transition: var(--transition);
  padding-bottom: 6px; border-bottom: 2px solid transparent;
}
.nav-item:hover, .nav-item.active { opacity: 1; color: var(--primary); border-bottom-color: var(--primary); }
.nav-actions { display: flex; align-items: center; gap: 12px; }
.mobile-toggle {
  display: none; background: transparent; border: 1px solid var(--card-border);
  color: var(--text-bright); font-size: 1.6rem; padding: 6px 12px;
  border-radius: 12px; cursor: pointer;
}

/* ----- Buttons ----- */
.btn {
  display: inline-flex; align-items: center; gap: 8px; padding: 12px 28px;
  border-radius: 50px; font-weight: 600; transition: var(--transition);
  border: 1px solid transparent; cursor: pointer;
}
.btn-primary { background: var(--primary); color: #fff; box-shadow: 0 6px 14px var(--glow); }
.btn-primary:hover { background: var(--primary-dark); transform: translateY(-2px); }
.btn-outline { background: transparent; border-color: var(--primary); color: var(--primary); }
.btn-outline:hover { background: rgba(97, 185, 9, 0.08); }
.btn-outline-small, .btn-primary-small { padding: 8px 18px; font-size: 0.9rem; border-radius: 40px; }
.btn-primary-small { background: var(--primary); color: #fff; }
.btn-outline-small { border: 1px solid var(--primary); color: var(--primary); }
.btn-full { width: 100%; justify-content: center; }

/* ----- Hero ----- */
.hero { padding: 70px 0 50px; }
.hero-grid { display: grid; grid-template-columns: 1.2fr 1fr; gap: 50px; align-items: center; }
.badge {
  display: inline-block; background: rgba(97, 185, 9, 0.12);
  color: var(--primary); padding: 6px 16px; border-radius: 40px;
  font-size: 0.9rem; font-weight: 500; margin-bottom: 20px;
}
.hero-title { font-size: 3.8rem; line-height: 1.15; margin-bottom: 24px; }
.hero-desc { font-size: 1.25rem; opacity: 0.85; max-width: 550px; margin-bottom: 36px; }
.hero-actions { display: flex; gap: 18px; flex-wrap: wrap; }
.hero-stats { display: flex; gap: 48px; margin-top: 48px; }
.stat-num { font-size: 2.2rem; font-weight: 700; color: var(--primary); }
.stat-label { display: block; opacity: 0.7; }
.code-card {
  background: var(--bg-surface); border-radius: 28px; padding: 24px;
  box-shadow: var(--shadow-sm); border: 1px solid var(--card-border);
}
.card-header { display: flex; align-items: center; gap: 8px; margin-bottom: 18px; }
.dot-red, .dot-yellow, .dot-green { width: 12px; height: 12px; border-radius: 50%; }
.dot-red { background: #ff5f56; } .dot-yellow { background: #ffbd2e; } .dot-green { background: #27c93f; }
.file-name { margin-left: auto; opacity: 0.6; font-size: 0.85rem; }
pre { font-family: 'Fira Code', monospace; font-size: 0.95rem; }
.keyword { color: #c792ea; } .string { color: #c3e88d; } .operator { color: #89ddff; }

/* ----- Sections ----- */
.section { padding: 80px 0; }
.section-header { display: flex; justify-content: space-between; align-items: baseline; margin-bottom: 48px; }
.section-title { font-size: 2.6rem; }
.more-link { color: var(--primary); font-weight: 600; }
.project-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(300px, 1fr)); gap: 32px; }
.project-card {
  background: var(--card-bg); backdrop-filter: blur(4px);
  border: 1px solid var(--card-border); border-radius: 32px;
  padding: 32px 28px; transition: var(--transition);
}
.project-card:hover { transform: translateY(-8px); border-color: var(--primary); box-shadow: 0 24px 36px -12px rgba(0,0,0,0.3); }
.card-icon { font-size: 2.4rem; color: var(--primary); margin-bottom: 20px; }
.tags { display: flex; flex-wrap: wrap; gap: 10px; margin: 20px 0 18px; }
.tags span { background: rgba(97, 185, 9, 0.12); padding: 5px 14px; border-radius: 40px; font-size: 0.8rem; color: var(--primary); }
.card-link { color: var(--primary); font-weight: 600; }

/* ----- Projects Page ----- */
.page-header { padding-bottom: 20px; }
.page-title { font-size: 3.4rem; }
.page-sub { font-size: 1.25rem; opacity: 0.8; }
.filter-bar { display: flex; gap: 12px; margin-bottom: 40px; flex-wrap: wrap; }
.filter-chip {
  background: transparent; border: 1px solid var(--card-border);
  padding: 8px 24px; border-radius: 40px; cursor: pointer;
  transition: var(--transition); font-weight: 500;
}
.filter-chip.active { background: var(--primary); color: #fff; border-color: var(--primary); }
.detailed .card-header-icon { font-size: 2rem; color: var(--primary); }
.card-footer-actions { display: flex; gap: 14px; margin-top: 24px; }

/* ----- Contact ----- */
.contact-grid { display: grid; grid-template-columns: 1fr 1.3fr; gap: 50px; }
.contact-info { display: flex; flex-direction: column; gap: 28px; }
.info-card {
  background: var(--card-bg); border: 1px solid var(--card-border);
  border-radius: 28px; padding: 32px;
}
.info-icon { font-size: 2.2rem; color: var(--primary); margin-bottom: 14px; }
.contact-link { color: var(--primary); font-weight: 600; word-break: break-all; }
.social-links-row { display: flex; gap: 28px; font-size: 1.7rem; }
.social-links-row a:hover { color: var(--primary); }
.contact-form {
  background: var(--card-bg); border: 1px solid var(--card-border);
  border-radius: 32px; padding: 40px;
}
.form-title { margin-bottom: 32px; }
.form-group { margin-bottom: 24px; }
.form-group label { display: block; margin-bottom: 8px; font-weight: 500; }
.form-group input, .form-group textarea {
  width: 100%; background: var(--bg-surface); border: 1px solid var(--card-border);
  border-radius: 20px; padding: 15px 20px; color: var(--text-bright);
  font-family: inherit; transition: var(--transition);
}
.form-group input:focus, .form-group textarea:focus {
  outline: none; border-color: var(--primary); box-shadow: 0 0 0 3px var(--glow);
}
.form-feedback { margin: 16px 0 8px; font-weight: 500; }
.success-feedback { color: var(--primary); }
.error-feedback { color: #ff8a8a; }
.form-note { margin-top: 20px; font-size: 0.85rem; opacity: 0.7; text-align: center; }

/* ----- Footer ----- */
.footer { border-top: 1px solid var(--card-border); padding: 48px 0 28px; margin-top: 40px; }
.footer-container { display: flex; justify-content: space-between; align-items: center; flex-wrap: wrap; gap: 24px; }
.footer-brand { display: flex; flex-direction: column; gap: 8px; }
.footer-tagline { opacity: 0.7; }
.footer-links { display: flex; gap: 36px; align-items: center; }
.footer-links a { opacity: 0.8; transition: var(--transition); }
.footer-links a:hover { opacity: 1; color: var(--primary); }
.footer-bottom { text-align: center; margin-top: 48px; opacity: 0.65; font-size: 0.9rem; }

/* ----- Responsive ----- */
@media (max-width: 768px) {
  .nav-links {
    display: none; position: absolute; top: 80px; left: 24px; right: 24px;
    background: var(--bg-surface); flex-direction: column; padding: 28px;
    border-radius: 28px; border: 1px solid var(--primary); box-shadow: var(--shadow-sm); z-index: 99;
  }
  .nav-links.show { display: flex; }
  .mobile-toggle { display: block; }
  .hero-grid, .contact-grid { grid-template-columns: 1fr; }
  .hero-title { font-size: 2.8rem; }
  .section-title { font-size: 2.2rem; }
  .footer-container { flex-direction: column; text-align: center; }
  .nav-actions { gap: 8px; }
}