/* ===== RESET & BASE ===== */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

:root {
  --blue-50: #E6F1FB;
  --blue-100: #B5D4F4;
  --blue-400: #378ADD;
  --blue-600: #185FA5;
  --blue-800: #0C447C;
  --blue-900: #042C53;
  --gray-50: #F7F8FA;
  --gray-100: #EDEEF2;
  --gray-200: #D8DAE2;
  --gray-400: #9EA3B5;
  --gray-600: #5C6175;
  --gray-800: #2C2F3E;
  --gray-900: #13151F;
  --white: #ffffff;
  --font-sans: 'DM Sans', sans-serif;
  --font-mono: 'DM Mono', monospace;
  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 16px;
  --shadow-sm: 0 1px 3px rgba(0,0,0,0.06), 0 1px 2px rgba(0,0,0,0.04);
  --shadow-md: 0 4px 16px rgba(0,0,0,0.08);
  --transition: 0.2s ease;
}

html { scroll-behavior: smooth; }

body {
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.7;
  color: var(--gray-800);
  background: var(--white);
  -webkit-font-smoothing: antialiased;
}

.container {
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 24px;
}

img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }

/* ===== HEADER / NAV ===== */
.header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(255,255,255,0.95);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--gray-100);
}

.nav {
  display: flex;
  align-items: center;
  gap: 32px;
  height: 64px;
}

.nav-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 500;
  font-size: 15px;
  color: var(--gray-900);
  flex-shrink: 0;
}

.logo-mark {
  width: 32px;
  height: 32px;
  background: var(--blue-600);
  color: white;
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 500;
  font-size: 16px;
  font-family: var(--font-mono);
}

.nav-links {
  display: flex;
  gap: 28px;
  flex: 1;
  justify-content: center;
}

.nav-links a {
  font-size: 14px;
  color: var(--gray-600);
  transition: color var(--transition);
  font-weight: 400;
}

.nav-links a:hover { color: var(--blue-600); }

.lang-switcher {
  display: flex;
  gap: 4px;
  margin-left: auto;
}

.lang-btn {
  font-size: 12px;
  font-weight: 500;
  padding: 4px 10px;
  border-radius: var(--radius-sm);
  color: var(--gray-400);
  transition: all var(--transition);
  font-family: var(--font-mono);
}

.lang-btn:hover { color: var(--blue-600); background: var(--blue-50); }
.lang-btn.active { color: var(--blue-600); background: var(--blue-50); }

.nav-toggle {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  color: var(--gray-600);
  font-size: 22px;
}

/* ===== HERO ===== */
.hero {
  padding: 88px 0 80px;
  text-align: center;
  position: relative;
  overflow: hidden;
}

.hero::before {
  content: '';
  position: absolute;
  top: -100px;
  left: 50%;
  transform: translateX(-50%);
  width: 600px;
  height: 600px;
  background: radial-gradient(circle, rgba(55, 138, 221, 0.07) 0%, transparent 70%);
  pointer-events: none;
}

.hero-eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 12px;
  font-weight: 500;
  color: var(--blue-600);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  font-family: var(--font-mono);
  margin-bottom: 24px;
  padding: 6px 14px;
  background: var(--blue-50);
  border-radius: 100px;
}

.hero h1 {
  font-size: clamp(32px, 5vw, 52px);
  font-weight: 300;
  line-height: 1.2;
  color: var(--gray-900);
  margin-bottom: 20px;
  letter-spacing: -0.02em;
}

.hero h1 span {
  color: var(--blue-600);
  font-weight: 500;
}

.hero-sub {
  font-size: 17px;
  color: var(--gray-600);
  max-width: 540px;
  margin: 0 auto 36px;
  line-height: 1.65;
}

.hero-actions {
  display: flex;
  gap: 12px;
  justify-content: center;
  flex-wrap: wrap;
}

.btn-primary {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: var(--blue-600);
  color: white;
  padding: 13px 26px;
  border-radius: var(--radius-md);
  font-size: 15px;
  font-weight: 500;
  transition: all var(--transition);
  border: none;
  cursor: pointer;
}

.btn-primary:hover { background: var(--blue-800); transform: translateY(-1px); }

.btn-secondary {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: transparent;
  color: var(--gray-600);
  padding: 13px 26px;
  border-radius: var(--radius-md);
  font-size: 15px;
  font-weight: 400;
  border: 1px solid var(--gray-200);
  transition: all var(--transition);
  cursor: pointer;
}

.btn-secondary:hover { border-color: var(--blue-400); color: var(--blue-600); }

/* ===== SECTIONS ===== */
.section { padding: 80px 0; }
.section-alt { background: var(--gray-50); }

.section-header { text-align: center; margin-bottom: 52px; }

.section-label {
  display: inline-block;
  font-size: 11px;
  font-weight: 500;
  color: var(--blue-600);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  font-family: var(--font-mono);
  margin-bottom: 12px;
}

.section-title {
  font-size: clamp(24px, 3vw, 34px);
  font-weight: 300;
  color: var(--gray-900);
  letter-spacing: -0.02em;
}

.section-sub {
  font-size: 16px;
  color: var(--gray-400);
  margin-top: 10px;
}

/* ===== SERVICES ===== */
.services-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 1px;
  background: var(--gray-100);
  border: 1px solid var(--gray-100);
  border-radius: var(--radius-lg);
  overflow: hidden;
}

.service-card {
  background: var(--white);
  padding: 28px 24px;
  transition: background var(--transition);
}

.service-card:hover { background: var(--blue-50); }

.service-icon {
  font-size: 24px;
  color: var(--blue-600);
  margin-bottom: 14px;
}

.service-card h3 {
  font-size: 15px;
  font-weight: 500;
  color: var(--gray-900);
  margin-bottom: 8px;
  line-height: 1.3;
}

.service-card p {
  font-size: 13px;
  color: var(--gray-600);
  line-height: 1.6;
}

/* ===== PORTFOLIO ===== */
.portfolio-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 20px;
}

.portfolio-card {
  background: var(--white);
  border: 1px solid var(--gray-100);
  border-radius: var(--radius-lg);
  padding: 28px;
  transition: all var(--transition);
  box-shadow: var(--shadow-sm);
}

.portfolio-card:hover { box-shadow: var(--shadow-md); transform: translateY(-2px); }

.portfolio-icon-wrap {
  width: 48px;
  height: 48px;
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 22px;
  margin-bottom: 18px;
}

.portfolio-icon-wrap.blue { background: var(--blue-50); color: var(--blue-600); }
.portfolio-icon-wrap.teal { background: #E1F5EE; color: #0F6E56; }
.portfolio-icon-wrap.purple { background: #EEEDFE; color: #534AB7; }
.portfolio-icon-wrap.amber { background: #FAEEDA; color: #854F0B; }

.portfolio-card h3 {
  font-size: 16px;
  font-weight: 500;
  color: var(--gray-900);
  margin-bottom: 10px;
}

.portfolio-card p {
  font-size: 13px;
  color: var(--gray-600);
  line-height: 1.65;
  margin-bottom: 16px;
}

.tags {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}

.tag {
  font-size: 11px;
  font-family: var(--font-mono);
  padding: 3px 9px;
  background: var(--gray-50);
  border: 1px solid var(--gray-100);
  border-radius: 100px;
  color: var(--gray-600);
}

/* ===== BLOG ===== */
.blog-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 20px;
}

.blog-card {
  background: var(--white);
  border: 1px solid var(--gray-100);
  border-radius: var(--radius-lg);
  padding: 28px;
  transition: all var(--transition);
}

.blog-card:hover { border-color: var(--blue-100); }

.blog-date {
  font-size: 12px;
  color: var(--gray-400);
  font-family: var(--font-mono);
  margin-bottom: 10px;
}

.blog-card h3 {
  font-size: 16px;
  font-weight: 500;
  color: var(--gray-900);
  margin-bottom: 10px;
  line-height: 1.4;
}

.blog-card p {
  font-size: 13px;
  color: var(--gray-600);
  line-height: 1.65;
}

.blog-placeholder {
  text-align: center;
  padding: 60px 24px;
  color: var(--gray-400);
  border: 1px dashed var(--gray-200);
  border-radius: var(--radius-lg);
}

.blog-placeholder i { font-size: 36px; margin-bottom: 12px; display: block; color: var(--gray-200); }
.blog-placeholder p { font-size: 14px; }

/* ===== CONTACT ===== */
.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  align-items: start;
}

.contact-info h2 {
  font-size: 28px;
  font-weight: 300;
  color: var(--gray-900);
  margin-bottom: 12px;
  letter-spacing: -0.01em;
}

.contact-info > p {
  font-size: 15px;
  color: var(--gray-600);
  margin-bottom: 32px;
  line-height: 1.65;
}

.contact-links { display: flex; flex-direction: column; gap: 14px; }

.contact-link {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 14px;
  color: var(--gray-600);
  transition: color var(--transition);
}

.contact-link:hover { color: var(--blue-600); }

.contact-link-icon {
  width: 36px;
  height: 36px;
  background: var(--blue-50);
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--blue-600);
  font-size: 16px;
  flex-shrink: 0;
}

.form-group { margin-bottom: 16px; }

.form-group label {
  display: block;
  font-size: 13px;
  color: var(--gray-600);
  margin-bottom: 6px;
  font-weight: 500;
}

.form-group input,
.form-group textarea {
  width: 100%;
  padding: 11px 14px;
  border: 1px solid var(--gray-200);
  border-radius: var(--radius-md);
  font-size: 14px;
  font-family: var(--font-sans);
  color: var(--gray-800);
  background: var(--white);
  transition: border-color var(--transition);
  outline: none;
}

.form-group input:focus,
.form-group textarea:focus { border-color: var(--blue-400); }

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

/* ===== FOOTER ===== */
.footer {
  border-top: 1px solid var(--gray-100);
  padding: 28px 0;
}

.footer-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 16px;
}

.footer-logo {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 14px;
  font-weight: 500;
}

.footer-copy {
  font-size: 13px;
  color: var(--gray-400);
}

.footer-social {
  display: flex;
  gap: 10px;
}

.footer-social a {
  width: 34px;
  height: 34px;
  border: 1px solid var(--gray-100);
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--gray-400);
  font-size: 16px;
  transition: all var(--transition);
}

.footer-social a:hover { color: var(--blue-600); border-color: var(--blue-100); }

/* ===== RESPONSIVE ===== */
@media (max-width: 768px) {
  .nav-links { display: none; }
  .nav-links.open {
    display: flex;
    flex-direction: column;
    position: absolute;
    top: 64px;
    left: 0;
    right: 0;
    background: white;
    padding: 16px 24px;
    border-bottom: 1px solid var(--gray-100);
    gap: 16px;
  }
  .nav-toggle { display: block; }
  .contact-grid { grid-template-columns: 1fr; gap: 40px; }
  .hero { padding: 56px 0 52px; }
  .section { padding: 56px 0; }
}