/* ===== Font: Inter (self-hosted) ===== */
@font-face {
  font-family: 'Inter';
  font-style: normal;
  font-weight: 300 700;
  font-display: swap;
  src: url(fonts/inter-latin-ext.woff2) format('woff2');
  unicode-range: U+0100-02BA, U+02BD-02C5, U+02C7-02CC, U+02CE-02D7, U+02DD-02FF, U+0304, U+0308, U+0329, U+1D00-1DBF, U+1E00-1E9F, U+1EF2-1EFF, U+2020, U+20A0-20AB, U+20AD-20C0, U+2113, U+2C60-2C7F, U+A720-A7FF;
}

@font-face {
  font-family: 'Inter';
  font-style: normal;
  font-weight: 300 700;
  font-display: swap;
  src: url(fonts/inter-latin.woff2) format('woff2');
  unicode-range: U+0000-00FF, U+0131, U+0152-0153, U+02BB-02BC, U+02C6, U+02DA, U+02DC, U+0304, U+0308, U+0329, U+2000-206F, U+20AC, U+2122, U+2191, U+2193, U+2212, U+2215, U+FEFF, U+FFFD;
}

/* ===== Variables ===== */
:root {
  --bg-primary: #0f0f10;
  --bg-secondary: #161618;
  --bg-tertiary: #1c1c1f;
  --accent: #4a9eed;
  --accent-hover: #6db5f5;
  --text-primary: #f0f4fa;
  --text-secondary: #8a8a8a;
  --text-tertiary: #6a6a6a;
  --border: #2a2a2d;
  --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --max-width: 1100px;
  --section-padding: 120px 24px;
  --section-padding-mobile: 80px 20px;
  --transition: 0.3s ease;
}

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

html {
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  font-family: var(--font-family);
  background-color: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.7;
  font-size: 16px;
  overflow-x: hidden;
}

a {
  color: inherit;
  text-decoration: none;
}

ul, ol {
  list-style: none;
}

img {
  max-width: 100%;
  display: block;
}

/* ===== Animations ===== */
@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(30px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.fadeInUp {
  opacity: 0;
  animation: fadeInUp 0.8s ease forwards;
}

.delay-1 { animation-delay: 0.1s; }
.delay-2 { animation-delay: 0.2s; }
.delay-3 { animation-delay: 0.3s; }
.delay-4 { animation-delay: 0.4s; }
.delay-5 { animation-delay: 0.5s; }
.delay-6 { animation-delay: 0.6s; }

/* ===== Section base ===== */
.section {
  padding: var(--section-padding);
  max-width: var(--max-width);
  margin: 0 auto;
}

.section-label {
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 16px;
}

.section-title {
  font-size: 2rem;
  font-weight: 600;
  line-height: 1.3;
  margin-bottom: 24px;
  color: var(--text-primary);
}

/* ===== Scrollbar ===== */
::-webkit-scrollbar {
  width: 6px;
}

::-webkit-scrollbar-track {
  background: var(--bg-primary);
}

::-webkit-scrollbar-thumb {
  background: var(--border);
  border-radius: 3px;
}

::-webkit-scrollbar-thumb:hover {
  background: var(--text-tertiary);
}

/* ===== Selection ===== */
::selection {
  background: var(--accent);
  color: var(--bg-primary);
}

/* ===== Navbar ===== */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  background: rgba(15, 15, 16, 0.85);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
}

.navbar-container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 24px;
  height: 64px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.navbar-logo {
  font-size: 1rem;
  font-weight: 600;
  letter-spacing: -0.01em;
  color: var(--text-primary);
  transition: color var(--transition);
}

.navbar-logo:hover {
  color: var(--accent);
}

.navbar-links {
  display: flex;
  align-items: center;
  gap: 32px;
}

.navbar-link {
  font-size: 0.875rem;
  color: var(--text-secondary);
  transition: color var(--transition);
  font-weight: 400;
}

.navbar-link:hover {
  color: var(--text-primary);
}

.navbar-linkedin {
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--accent);
  transition: color var(--transition);
}

.navbar-linkedin:hover {
  color: var(--accent-hover);
}

.navbar-icon {
  flex-shrink: 0;
}

.navbar-lang {
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.05em;
  color: var(--text-secondary);
  border: 1px solid var(--border);
  padding: 4px 10px;
  border-radius: 4px;
  transition: color var(--transition), border-color var(--transition);
}

.navbar-lang:hover {
  color: var(--text-primary);
  border-color: var(--text-tertiary);
}

/* ===== Hero ===== */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
}

.hero-container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 24px;
  text-align: center;
  position: relative;
  z-index: 1;
}

.hero-avatar-wrapper {
  display: flex;
  justify-content: center;
  margin-bottom: 28px;
}

.hero-avatar {
  width: 120px;
  height: 120px;
  border-radius: 50%;
  border: 3px solid var(--border);
  object-fit: cover;
}

.hero-label {
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 24px;
}

.hero-title {
  font-size: clamp(3rem, 8vw, 5.5rem);
  font-weight: 700;
  letter-spacing: -0.03em;
  line-height: 1.05;
  margin-bottom: 24px;
  color: var(--text-primary);
}

.hero-subtitle {
  font-size: clamp(1.1rem, 2.5vw, 1.35rem);
  color: var(--text-secondary);
  max-width: 600px;
  margin: 0 auto 48px;
  line-height: 1.7;
  font-weight: 300;
}

.hero-cta {
  display: flex;
  justify-content: center;
  gap: 16px;
  flex-wrap: wrap;
}

.hero-cta-button {
  display: inline-flex;
  align-items: center;
  padding: 14px 36px;
  background: var(--accent);
  color: var(--bg-primary);
  font-size: 0.9rem;
  font-weight: 600;
  border-radius: 6px;
  transition: background var(--transition), transform var(--transition);
  letter-spacing: -0.01em;
}

.hero-cta-button:hover {
  background: var(--accent-hover);
  transform: translateY(-1px);
}

.hero-cta-secondary {
  display: inline-flex;
  align-items: center;
  padding: 14px 36px;
  background: transparent;
  color: var(--text-secondary);
  font-size: 0.9rem;
  font-weight: 500;
  border-radius: 6px;
  border: 1px solid var(--border);
  transition: color var(--transition), border-color var(--transition), transform var(--transition);
  letter-spacing: -0.01em;
}

.hero-cta-secondary:hover {
  color: var(--text-primary);
  border-color: var(--text-tertiary);
  transform: translateY(-1px);
}

.hero-gradient {
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  height: 200px;
  background: linear-gradient(to top, var(--bg-primary), transparent);
  pointer-events: none;
}

/* ===== About ===== */
.about {
  border-top: 1px solid var(--border);
}

.about-content {
  max-width: 720px;
}

.about-text {
  font-size: 1.05rem;
  color: var(--text-secondary);
  line-height: 1.8;
  margin-bottom: 20px;
}

.about-text strong {
  color: var(--text-primary);
  font-weight: 500;
}

.about-text:last-child {
  margin-bottom: 0;
}

.about-link {
  color: var(--accent);
  transition: color var(--transition);
}

.about-link:hover {
  color: var(--accent-hover);
}

.about-stats {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 32px;
  margin-top: 64px;
  padding-top: 48px;
  border-top: 1px solid var(--border);
}

.about-stat {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.about-stat-number {
  font-size: 2.5rem;
  font-weight: 700;
  color: var(--accent);
  letter-spacing: -0.02em;
  line-height: 1.1;
}

.about-stat-label {
  font-size: 0.85rem;
  color: var(--text-secondary);
  font-weight: 400;
}

/* ===== Expertise ===== */
.expertise {
  border-top: 1px solid var(--border);
  background: var(--bg-secondary);
}

.expertise-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1px;
  background: var(--border);
  border: 1px solid var(--border);
  border-radius: 8px;
  overflow: hidden;
  margin-top: 16px;
}

.expertise-card {
  padding: 40px 32px;
  background: var(--bg-secondary);
  transition: background var(--transition);
}

.expertise-card:hover {
  background: var(--bg-tertiary);
}

.expertise-icon {
  color: var(--accent);
  margin-bottom: 20px;
}

.expertise-card-title {
  font-size: 1.05rem;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 10px;
  letter-spacing: -0.01em;
}

.expertise-card-desc {
  font-size: 0.9rem;
  color: var(--text-secondary);
  line-height: 1.7;
}

/* ===== Certifications ===== */
.certifications {
  border-top: 1px solid var(--border);
}

.certifications-intro {
  font-size: 1.05rem;
  color: var(--text-secondary);
  line-height: 1.7;
  max-width: 620px;
}

.certifications-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1px;
  background: var(--border);
  border: 1px solid var(--border);
  border-radius: 8px;
  overflow: hidden;
  margin-top: 40px;
}

.certifications-card {
  padding: 40px 32px;
  background: var(--bg-primary);
  transition: background var(--transition);
}

.certifications-card:hover {
  background: var(--bg-secondary);
}

.certifications-icon {
  color: var(--accent);
  margin-bottom: 20px;
}

.certifications-badge {
  display: block;
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--text-primary);
  letter-spacing: -0.01em;
  margin-bottom: 4px;
}

.certifications-issuer {
  font-size: 0.8rem;
  color: var(--accent);
  font-weight: 500;
  margin-bottom: 12px;
}

.certifications-desc {
  font-size: 0.9rem;
  color: var(--text-secondary);
  line-height: 1.7;
}

/* ===== Contact ===== */
.contact {
  border-top: 1px solid var(--border);
  background: var(--bg-secondary);
}

.contact-inner {
  text-align: center;
  max-width: 560px;
  margin: 0 auto;
}

.contact-title {
  font-size: 2.2rem;
  font-weight: 600;
  line-height: 1.2;
  margin-bottom: 16px;
  color: var(--text-primary);
  letter-spacing: -0.02em;
}

.contact-text {
  font-size: 1.05rem;
  color: var(--text-secondary);
  line-height: 1.7;
  margin-bottom: 40px;
}

.contact-buttons {
  display: flex;
  justify-content: center;
  gap: 16px;
  flex-wrap: wrap;
}

.contact-button {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 16px 40px;
  background: var(--accent);
  color: var(--bg-primary);
  font-size: 1rem;
  font-weight: 600;
  border-radius: 6px;
  transition: background var(--transition), transform var(--transition);
  letter-spacing: -0.01em;
}

.contact-button:hover {
  background: var(--accent-hover);
  transform: translateY(-1px);
}

.contact-button-secondary {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 16px 40px;
  background: transparent;
  color: var(--text-secondary);
  font-size: 1rem;
  font-weight: 500;
  border-radius: 6px;
  border: 1px solid var(--border);
  transition: color var(--transition), border-color var(--transition), transform var(--transition);
  letter-spacing: -0.01em;
}

.contact-button-secondary:hover {
  color: var(--text-primary);
  border-color: var(--text-tertiary);
  transform: translateY(-1px);
}

/* ===== Footer ===== */
.footer {
  border-top: 1px solid var(--border);
  padding: 40px 24px;
}

.footer-container {
  max-width: var(--max-width);
  margin: 0 auto;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.footer-copy {
  font-size: 0.8rem;
  color: var(--text-tertiary);
}

/* ===== Responsive ===== */
@media (max-width: 900px) {
  .expertise-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .certifications-grid {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 768px) {
  .section {
    padding: var(--section-padding-mobile);
  }

  .section-title {
    font-size: 1.5rem;
  }

  .contact-title {
    font-size: 1.75rem;
  }
}

@media (max-width: 640px) {
  .navbar-links {
    gap: 20px;
  }

  .navbar-link {
    display: none;
  }

  .about-stats {
    grid-template-columns: 1fr;
    gap: 24px;
    margin-top: 48px;
    padding-top: 32px;
  }

  .about-stat {
    flex-direction: row;
    align-items: baseline;
    gap: 12px;
  }

  .about-stat-number {
    font-size: 2rem;
  }
}

@media (max-width: 600px) {
  .expertise-grid {
    grid-template-columns: 1fr;
  }

  .expertise-card {
    padding: 32px 24px;
  }
}

@media (max-width: 480px) {
  .footer-container {
    flex-direction: column;
    gap: 8px;
    text-align: center;
  }
}