/* ===== PG Techs - Global Stylesheet ===== */

/* --- Reset & Base --- */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

:root {
  --blue-900: #0f2a4a;
  --blue-800: #153d6f;
  --blue-700: #1a5296;
  --blue-600: #2068b5;
  --blue-500: #2b7fd4;
  --blue-100: #dbeafe;
  --blue-50: #eff6ff;
  --gray-900: #111827;
  --gray-700: #374151;
  --gray-500: #6b7280;
  --gray-300: #d1d5db;
  --gray-200: #e5e7eb;
  --gray-100: #f3f4f6;
  --gray-50: #f9fafb;
  --white: #ffffff;
  --accent: #f59e0b;
  --font-main: 'Segoe UI', system-ui, -apple-system, sans-serif;
  --max-width: 1140px;
  --shadow-sm: 0 1px 3px rgba(0,0,0,.1);
  --shadow-md: 0 4px 12px rgba(0,0,0,.1);
  --shadow-lg: 0 10px 30px rgba(0,0,0,.12);
  --radius: 8px;
  --transition: .25s ease;
}

html { scroll-behavior: smooth; }
body {
  font-family: var(--font-main);
  color: var(--gray-700);
  line-height: 1.65;
  background: var(--white);
}
img { max-width: 100%; display: block; }
a { color: var(--blue-600); text-decoration: none; transition: color var(--transition); }
a:hover { color: var(--blue-800); }

/* --- Utility --- */
.container { width: 90%; max-width: var(--max-width); margin: 0 auto; }
.section { padding: 70px 0; }
.section-alt { background: var(--gray-50); }
.section-dark { background: var(--blue-900); color: var(--white); }
.text-center { text-align: center; }

.section-heading {
  font-size: 2rem;
  font-weight: 700;
  color: var(--blue-900);
  margin-bottom: 12px;
}
.section-dark .section-heading { color: var(--white); }
.section-sub {
  font-size: 1.1rem;
  color: var(--gray-500);
  max-width: 620px;
  margin: 0 auto 40px;
}
.section-dark .section-sub { color: var(--blue-100); }

/* --- Buttons --- */
.btn {
  display: inline-block;
  padding: 13px 30px;
  font-size: 1rem;
  font-weight: 600;
  border-radius: var(--radius);
  cursor: pointer;
  border: none;
  transition: background var(--transition), transform var(--transition);
}
.btn:hover { transform: translateY(-1px); }
.btn-primary { background: var(--blue-600); color: var(--white); }
.btn-primary:hover { background: var(--blue-700); color: var(--white); }
.btn-outline { background: transparent; color: var(--white); border: 2px solid var(--white); }
.btn-outline:hover { background: var(--white); color: var(--blue-900); }
.btn-accent { background: var(--accent); color: var(--blue-900); }
.btn-accent:hover { background: #d97706; color: var(--white); }

/* --- Header / Nav --- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: var(--white);
  border-bottom: 1px solid var(--gray-200);
  box-shadow: var(--shadow-sm);
}
.site-header .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 70px;
}
.logo {
  font-size: 1.5rem;
  font-weight: 800;
  color: var(--blue-900);
  letter-spacing: -.5px;
}
.logo span { color: var(--blue-600); }
nav ul {
  list-style: none;
  display: flex;
  gap: 28px;
}
nav a {
  color: var(--gray-700);
  font-weight: 500;
  font-size: .95rem;
  padding: 6px 0;
  position: relative;
}
nav a::after {
  content: '';
  position: absolute;
  bottom: 0; left: 0;
  width: 0; height: 2px;
  background: var(--blue-600);
  transition: width var(--transition);
}
nav a:hover, nav a.active { color: var(--blue-600); }
nav a:hover::after, nav a.active::after { width: 100%; }

.nav-cta {
  background: var(--blue-600);
  color: var(--white) !important;
  padding: 8px 20px;
  border-radius: var(--radius);
  font-weight: 600;
}
.nav-cta:hover { background: var(--blue-700); }
.nav-cta::after { display: none; }

/* Mobile nav toggle */
.nav-toggle { display: none; background: none; border: none; cursor: pointer; padding: 4px; }
.nav-toggle span {
  display: block;
  width: 26px; height: 3px;
  background: var(--gray-700);
  margin: 5px 0;
  border-radius: 2px;
  transition: var(--transition);
}

/* --- Hero --- */
.hero {
  background: linear-gradient(135deg, var(--blue-900) 0%, var(--blue-700) 100%);
  color: var(--white);
  padding: 100px 0 90px;
  position: relative;
  overflow: hidden;
}
.hero::after {
  content: '';
  position: absolute;
  top: -50%; right: -20%;
  width: 600px; height: 600px;
  background: rgba(255,255,255,.04);
  border-radius: 50%;
}
.hero h1 {
  font-size: 2.8rem;
  font-weight: 800;
  line-height: 1.2;
  margin-bottom: 18px;
  max-width: 650px;
}
.hero p {
  font-size: 1.2rem;
  color: var(--blue-100);
  max-width: 560px;
  margin-bottom: 32px;
  line-height: 1.7;
}
.hero-buttons { display: flex; gap: 14px; flex-wrap: wrap; }

/* --- Cards Grid --- */
.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 28px;
}
.card {
  background: var(--white);
  border: 1px solid var(--gray-200);
  border-radius: var(--radius);
  padding: 32px 28px;
  transition: box-shadow var(--transition), transform var(--transition);
}
.card:hover { box-shadow: var(--shadow-md); transform: translateY(-3px); }
.card-icon {
  width: 52px; height: 52px;
  background: var(--blue-50);
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
  margin-bottom: 18px;
  color: var(--blue-600);
}
.card h3 {
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--blue-900);
  margin-bottom: 10px;
}
.card p { font-size: .95rem; color: var(--gray-500); }

/* --- Stats Bar --- */
.stats-bar {
  background: var(--blue-800);
  padding: 40px 0;
  color: var(--white);
}
.stats-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 24px;
  text-align: center;
}
.stat-number { font-size: 2.4rem; font-weight: 800; color: var(--accent); }
.stat-label { font-size: .95rem; color: var(--blue-100); margin-top: 4px; }

/* --- CTA Banner --- */
.cta-banner {
  background: linear-gradient(135deg, var(--blue-700) 0%, var(--blue-900) 100%);
  color: var(--white);
  padding: 60px 0;
  text-align: center;
}
.cta-banner h2 { font-size: 2rem; font-weight: 700; margin-bottom: 14px; }
.cta-banner p { font-size: 1.1rem; color: var(--blue-100); margin-bottom: 28px; max-width: 520px; margin-left: auto; margin-right: auto; }

/* --- About page specifics --- */
.about-content {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 50px;
  align-items: center;
}
.about-text h2 { font-size: 1.8rem; color: var(--blue-900); margin-bottom: 16px; }
.about-text p { margin-bottom: 16px; }
.about-image {
  background: linear-gradient(135deg, var(--blue-100), var(--blue-50));
  border-radius: var(--radius);
  height: 360px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 5rem;
  color: var(--blue-600);
}
.skill-list {
  list-style: none;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 10px;
  margin-top: 10px;
}
.skill-list li {
  padding: 6px 0;
  font-size: .95rem;
  color: var(--gray-700);
}
.skill-list li::before {
  content: '\2713';
  color: var(--blue-600);
  font-weight: 700;
  margin-right: 8px;
}

/* --- Contact Form --- */
.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1.2fr;
  gap: 50px;
}
.contact-info-block { margin-bottom: 28px; }
.contact-info-block h3 {
  font-size: 1rem;
  color: var(--blue-900);
  font-weight: 700;
  margin-bottom: 6px;
}
.contact-info-block p { color: var(--gray-500); font-size: .95rem; }
.contact-info-block a { color: var(--blue-600); }

.form-group { margin-bottom: 18px; }
.form-group label {
  display: block;
  font-size: .9rem;
  font-weight: 600;
  color: var(--gray-700);
  margin-bottom: 6px;
}
.form-group input,
.form-group select,
.form-group textarea {
  width: 100%;
  padding: 12px 14px;
  font-size: .95rem;
  border: 1px solid var(--gray-300);
  border-radius: var(--radius);
  font-family: var(--font-main);
  transition: border-color var(--transition);
  background: var(--white);
}
.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
  outline: none;
  border-color: var(--blue-600);
  box-shadow: 0 0 0 3px rgba(32, 104, 181, .12);
}
.form-group textarea { resize: vertical; min-height: 130px; }
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }

/* --- Footer --- */
.site-footer {
  background: var(--gray-900);
  color: var(--gray-300);
  padding: 50px 0 24px;
}
.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr;
  gap: 40px;
  margin-bottom: 36px;
}
.footer-brand .logo { color: var(--white); margin-bottom: 12px; display: inline-block; }
.footer-brand p { font-size: .9rem; color: var(--gray-500); max-width: 320px; line-height: 1.6; }
.footer-col h4 { font-size: .95rem; color: var(--white); font-weight: 700; margin-bottom: 14px; }
.footer-col ul { list-style: none; }
.footer-col li { margin-bottom: 8px; }
.footer-col a { color: var(--gray-500); font-size: .9rem; }
.footer-col a:hover { color: var(--white); }
.footer-bottom {
  border-top: 1px solid rgba(255,255,255,.1);
  padding-top: 20px;
  text-align: center;
  font-size: .85rem;
  color: var(--gray-500);
}

/* --- Responsive --- */
@media (max-width: 768px) {
  .nav-toggle { display: block; }
  nav ul {
    display: none;
    position: absolute;
    top: 70px; left: 0; right: 0;
    background: var(--white);
    flex-direction: column;
    padding: 20px;
    gap: 8px;
    border-bottom: 1px solid var(--gray-200);
    box-shadow: var(--shadow-md);
  }
  nav ul.open { display: flex; }
  nav li { width: 100%; }
  nav a { display: block; padding: 10px 0; }
  .nav-cta { text-align: center; margin-top: 8px; display: block; }
  .hero h1 { font-size: 2rem; }
  .hero { padding: 60px 0; }
  .about-content { grid-template-columns: 1fr; }
  .about-image { height: 240px; }
  .contact-grid { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr; }
  .skill-list { grid-template-columns: 1fr; }
  .form-row { grid-template-columns: 1fr; }
  .hero-buttons { flex-direction: column; }
  .hero-buttons .btn { text-align: center; }
}