/* --- Variables --- */
:root {
  --bg: #0f1419;
  --surface: #1a2332;
  --border: #2d3a4d;
  --text: #e6edf3;
  --text-muted: #8b9cb3;
  --accent: #00d9a5;
  --accent-dim: #00b386;
  --font-sans: "DM Sans", system-ui, sans-serif;
  --font-mono: "JetBrains Mono", monospace;
  --space-xs: 0.25rem;
  --space-sm: 0.5rem;
  --space-md: 1rem;
  --space-lg: 1.5rem;
  --space-xl: 2rem;
  --space-2xl: 3rem;
  --radius: 6px;
  --max-width: 720px;
}

/* --- Reset & base --- */
*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: var(--font-sans);
  font-size: 1rem;
  line-height: 1.6;
  color: var(--text);
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
}

/* --- Header --- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 10;
  padding: var(--space-md) var(--space-lg);
  background: rgba(15, 20, 25, 0.85);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--border);
}
.nav {
  display: flex;
  gap: var(--space-lg);
  justify-content: center;
  flex-wrap: wrap;
}
.nav-link {
  color: var(--text-muted);
  text-decoration: none;
  font-weight: 500;
  font-size: 0.95rem;
  transition: color 0.2s;
}
.nav-link:hover {
  color: var(--accent);
}

/* --- Main --- */
main {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: var(--space-2xl) var(--space-lg);
}

/* --- Hero --- */
.hero {
  padding: var(--space-2xl) 0;
  text-align: center;
}
.hero-photo {
  display: block;
  width: 160px;
  height: 160px;
  margin: 0 auto var(--space-lg);
  border-radius: 50%;
  object-fit: cover;
  border: 3px solid var(--border);
}
.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: var(--space-sm);
  margin: 0 auto var(--space-md);
  padding: var(--space-sm) var(--space-md);
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  font-family: var(--font-mono);
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--accent);
}
.hero-go-icon {
  flex-shrink: 0;
  vertical-align: middle;
}
.hero-title {
  font-family: var(--font-mono);
  font-size: clamp(1.75rem, 5vw, 2.25rem);
  font-weight: 500;
  margin: 0 0 var(--space-md);
  letter-spacing: -0.02em;
}
.hero-title .accent {
  color: var(--accent);
}
.hero-subtitle {
  margin: 0;
  color: var(--text-muted);
  font-size: 1.05rem;
}

/* --- Sections --- */
.section {
  padding: var(--space-2xl) 0;
  border-top: 1px solid var(--border);
}
.section-title {
  font-family: var(--font-mono);
  font-size: 1.25rem;
  font-weight: 500;
  margin: 0 0 var(--space-lg);
  color: var(--text);
  text-align: center;
}
.section-title::after {
  content: "";
  display: block;
  width: 2rem;
  height: 2px;
  background: var(--accent);
  margin-top: var(--space-xs);
  margin-left: auto;
  margin-right: auto;
}

/* --- About --- */
.about-content {
  text-align: justify;
}
.about-content p {
  margin: 0 0 var(--space-md);
  color: var(--text-muted);
}
.about-content p:last-child {
  margin-bottom: 0;
}
.about-intro {
  color: var(--text) !important;
  font-size: 1.05rem;
}

/* --- Stack --- */
.stack-intro {
  margin: 0 0 var(--space-lg);
  color: var(--text-muted);
  font-size: 0.95rem;
  text-align: center;
}
.stack-list {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-sm);
  list-style: none;
  margin: 0;
  padding: 0;
  justify-content: center;
}
.stack-item {
  display: inline-flex;
  align-items: center;
  gap: var(--space-sm);
  font-family: var(--font-mono);
  font-size: 0.85rem;
  padding: var(--space-sm) var(--space-md);
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  color: var(--text);
}
.stack-item:hover {
  border-color: var(--accent);
  color: var(--accent);
}
.stack-item:hover .stack-icon {
  filter: brightness(1.35);
}
.stack-icon {
  flex-shrink: 0;
  vertical-align: middle;
}

/* --- Experience / Projects --- */
.experience-intro {
  margin: 0 0 var(--space-lg);
  color: var(--text-muted);
  font-size: 0.95rem;
  text-align: center;
}
.work-experience {
  margin-bottom: var(--space-2xl);
}
.work-card {
  padding: var(--space-lg);
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  text-align: justify;
}
.work-header {
  margin-bottom: var(--space-md);
}
.work-title {
  font-family: var(--font-mono);
  font-size: 1.1rem;
  font-weight: 500;
  margin: 0 0 var(--space-xs);
  color: var(--text);
}
.work-company {
  font-size: 0.95rem;
  color: var(--accent);
}
.work-date {
  display: block;
  font-size: 0.85rem;
  color: var(--text-muted);
  margin-top: var(--space-xs);
}
.work-highlights {
  margin: 0;
  padding-left: 1.25rem;
  color: var(--text-muted);
  font-size: 0.95rem;
  line-height: 1.6;
}
.work-highlights li {
  margin-bottom: var(--space-sm);
}
.work-highlights li:last-child {
  margin-bottom: 0;
}
.subsection-title {
  font-family: var(--font-mono);
  font-size: 1rem;
  font-weight: 500;
  margin: 0 0 var(--space-lg);
  color: var(--text-muted);
  text-align: center;
}
.projects {
  display: flex;
  flex-direction: column;
  gap: var(--space-lg);
}
.project-card {
  padding: var(--space-lg);
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  transition: border-color 0.2s;
  text-align: justify;
}
.project-card:hover {
  border-color: var(--border);
  box-shadow: 0 0 0 1px var(--border);
}
.project-title {
  font-family: var(--font-mono);
  font-size: 1.1rem;
  font-weight: 500;
  margin: 0 0 var(--space-sm);
  color: var(--text);
}
.project-description {
  margin: 0 0 var(--space-md);
  color: var(--text-muted);
  font-size: 0.95rem;
}
.project-tech {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-xs);
  list-style: none;
  margin: 0 0 var(--space-sm);
  padding: 0;
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--text-muted);
}
.project-tech li {
  padding: 2px 6px;
  background: var(--bg);
  border-radius: 4px;
}
.project-links {
  margin: 0;
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-md);
  align-items: center;
}
.project-link {
  display: inline-flex;
  align-items: center;
  gap: var(--space-xs);
  color: var(--accent);
  text-decoration: none;
  font-size: 0.9rem;
  font-weight: 500;
}
.project-link:hover {
  color: var(--accent-dim);
  text-decoration: underline;
}
.project-link:hover .project-link-icon {
  filter: brightness(1.35);
}
.project-link-icon {
  flex-shrink: 0;
  vertical-align: middle;
}
.projects-error {
  color: var(--text-muted);
  font-size: 0.9rem;
}
.projects-error code {
  font-family: var(--font-mono);
  font-size: 0.85em;
  background: var(--surface);
  padding: 2px 6px;
  border-radius: 4px;
}

/* --- Education --- */
.education-content {
  color: var(--text-muted);
  font-size: 0.95rem;
  text-align: justify;
}
.education-item {
  margin-bottom: var(--space-lg);
}
.education-school {
  font-family: var(--font-mono);
  font-size: 1.05rem;
  font-weight: 500;
  margin: 0 0 var(--space-xs);
  color: var(--text);
  text-align: center;
}
.education-institute,
.education-degree {
  margin: 0 0 var(--space-xs);
  text-align: center;
}
.education-date {
  display: block;
  font-size: 0.9rem;
  color: var(--accent);
  margin-top: var(--space-sm);
  text-align: center;
}
.education-extracurricular {
  margin: 0;
  line-height: 1.65;
}

/* --- Languages --- */
.languages-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-md);
  justify-content: center;
}
.languages-list li {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  padding: var(--space-sm) var(--space-md);
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  font-size: 0.95rem;
}
.lang-flag {
  font-size: 1.35rem;
  line-height: 1;
}
.lang-name {
  color: var(--text);
  font-weight: 500;
}
.lang-level {
  color: var(--text-muted);
  font-size: 0.9em;
  margin-left: auto;
}

/* --- Certifications & Awards --- */
.certifications-content {
  color: var(--text-muted);
  font-size: 0.95rem;
  text-align: justify;
}
.cert-subsection {
  font-family: var(--font-mono);
  font-size: 1rem;
  font-weight: 500;
  margin: var(--space-lg) 0 var(--space-md);
  color: var(--text);
  text-align: center;
}
.cert-subsection:first-child {
  margin-top: 0;
}
.cert-list {
  margin: 0 0 var(--space-md);
  padding-left: 1.25rem;
  line-height: 1.65;
}
.cert-list li {
  margin-bottom: var(--space-sm);
}
.cert-list li:last-child {
  margin-bottom: 0;
}
.cert-list strong {
  color: var(--text);
}
.cert-link {
  color: var(--accent);
  text-decoration: none;
}
.cert-link:hover {
  color: var(--accent-dim);
  text-decoration: underline;
}

/* --- Contact --- */
.contact-intro {
  margin: 0 0 var(--space-lg);
  color: var(--text-muted);
  font-size: 0.95rem;
  text-align: center;
}
.contact-links {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-lg);
  justify-content: center;
  align-items: center;
}
.contact-link {
  display: inline-flex;
  align-items: center;
  gap: var(--space-sm);
  color: var(--text-muted);
  text-decoration: none;
  font-weight: 500;
  font-size: 0.95rem;
  padding: var(--space-md) var(--space-lg);
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  transition: color 0.2s, border-color 0.2s;
}
.contact-link:hover {
  color: var(--accent);
  border-color: var(--accent);
}
.contact-link:hover .contact-icon {
  filter: brightness(1.35);
}
.contact-icon {
  flex-shrink: 0;
}

/* --- Footer --- */
.site-footer {
  margin-top: var(--space-2xl);
  padding: var(--space-xl) var(--space-lg);
  border-top: 1px solid var(--border);
  text-align: center;
  color: var(--text-muted);
  font-size: 0.9rem;
}
.site-footer p {
  margin: 0;
}