:root {
  --bg: #fafafa;
  --surface: #ffffff;
  --text: #1a1a1a;
  --text-secondary: #5f6368;
  --border: #e8e8ec;
  --accent: #6d5bd0;
  --accent-dark: #5945b3;
  --accent-soft: #efeafc;
  --radius: 12px;
  --shadow: 0 2px 10px rgba(20, 20, 40, 0.06);
  --shadow-hover: 0 8px 24px rgba(20, 20, 40, 0.12);
  --font-sans: 'Inter', -apple-system, 'Segoe UI', sans-serif;
  --max-width: 1080px;
}

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

html, body { height: 100%; }

body {
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-sans);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

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

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

.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 24px;
}

button, .btn {
  font-family: inherit;
  cursor: pointer;
  border: none;
}

.site-header {
  position: sticky;
  top: 0;
  background: rgba(250, 250, 250, 0.85);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--border);
  z-index: 10;
}

.site-header .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: 16px;
  padding-bottom: 16px;
}

.site-header .logo { font-weight: 700; font-size: 18px; }

.header-actions { display: flex; align-items: center; gap: 12px; }

#lang-toggle {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 8px 14px;
  font-size: 13px;
  font-weight: 600;
  color: var(--text);
}

#lang-toggle:hover { border-color: var(--accent); color: var(--accent); }

.btn-download-cv {
  background: var(--accent);
  color: #fff;
  border-radius: 8px;
  padding: 8px 16px;
  font-size: 13px;
  font-weight: 600;
}

.btn-download-cv:hover { background: var(--accent-dark); }

.hero { padding: 96px 0 64px; text-align: center; }

.hero-title-label {
  display: inline-block;
  color: var(--accent);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 2px;
  text-transform: uppercase;
  margin-bottom: 16px;
}

.hero h1 { font-size: 42px; font-weight: 800; margin-bottom: 12px; }

.hero-subtitle { font-size: 18px; color: var(--text-secondary); margin-bottom: 32px; }

.hero-links {
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: 12px;
  margin-bottom: 32px;
}

.hero-links a {
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 8px 16px;
  font-size: 14px;
  background: var(--surface);
}

.hero-links a:hover { border-color: var(--accent); color: var(--accent); }

.hero-cta {
  display: inline-block;
  background: var(--accent);
  color: #fff;
  border-radius: 8px;
  padding: 12px 28px;
  font-weight: 700;
}

.hero-cta:hover { background: var(--accent-dark); }

section.page-section { padding: 56px 0; }

section.page-section h2 { font-size: 28px; font-weight: 800; margin-bottom: 24px; }

.about-text { max-width: 720px; font-size: 16px; color: var(--text-secondary); }

.skills-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 20px;
}

.skill-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 20px;
}

.skill-card h3 {
  font-size: 13px;
  text-transform: uppercase;
  letter-spacing: 1px;
  color: var(--accent);
  margin-bottom: 8px;
}

.skill-card p { font-size: 14px; color: var(--text-secondary); }

.experience-list { display: flex; flex-direction: column; gap: 24px; }

.experience-item { border-inline-start: 3px solid var(--accent); padding-inline-start: 20px; }

.experience-item .exp-role { font-weight: 700; font-size: 17px; display: block; }

.experience-item .exp-org { color: var(--accent); font-size: 14px; display: block; margin-bottom: 4px; }

.experience-item .exp-dates { color: var(--text-secondary); font-size: 13px; margin-bottom: 8px; display: block; }

.experience-item .exp-desc { color: var(--text-secondary); font-size: 14px; }

.projects-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 24px;
}

.project-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--shadow);
  transition: transform 0.2s ease, box-shadow 0.2s ease;
  display: block;
}

.project-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-hover); }

.project-card-link { display: block; color: inherit; }

.project-card-image-wrap { position: relative; }

.project-card-image-link { display: block; }

.project-card-image { aspect-ratio: 16 / 9; background: var(--accent-soft); overflow: hidden; }

.project-card-image img { width: 100%; height: 100%; object-fit: cover; }

.project-card-body { padding: 20px; }

.project-card-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
  margin-bottom: 8px;
}

.project-card-header h3 { font-size: 18px; font-weight: 700; }

.project-card-body p { color: var(--text-secondary); font-size: 14px; margin-bottom: 12px; }

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

.tech-tag {
  background: var(--accent-soft);
  color: var(--accent-dark);
  font-size: 12px;
  font-weight: 600;
  padding: 4px 10px;
  border-radius: 999px;
}

.badge-coming-soon {
  background: #fff4e5;
  color: #b5690a;
  font-size: 11px;
  font-weight: 700;
  padding: 3px 8px;
  border-radius: 999px;
  white-space: nowrap;
}

.project-card-demo-badge {
  position: absolute;
  left: 12px;
  bottom: 12px;
  z-index: 2;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: var(--surface);
  color: var(--accent-dark);
  font-size: 12px;
  font-weight: 700;
  padding: 6px 12px;
  border-radius: 999px;
  box-shadow: var(--shadow);
  transition: background 0.15s ease, color 0.15s ease;
}

.project-card-demo-badge:hover { background: var(--accent); color: #fff; }

.project-card-demo-badge-disabled {
  background: rgba(255, 255, 255, 0.7);
  color: var(--text-secondary);
  box-shadow: none;
  cursor: default;
}

.project-card-demo-badge-disabled:hover { background: rgba(255, 255, 255, 0.7); color: var(--text-secondary); }

.site-footer {
  border-top: 1px solid var(--border);
  padding: 40px 0;
  margin-top: 64px;
  text-align: center;
  color: var(--text-secondary);
  font-size: 14px;
}

.site-footer .footer-links { display: flex; justify-content: center; gap: 16px; margin-top: 12px; }

.site-footer .footer-links a:hover { color: var(--accent); }

.back-link {
  display: inline-block;
  margin: 32px 0 24px;
  color: var(--accent);
  font-weight: 600;
  font-size: 14px;
}

.project-detail { padding-bottom: 80px; }

.project-detail-image {
  aspect-ratio: 16 / 9;
  background: var(--accent-soft);
  border-radius: var(--radius);
  overflow: hidden;
  margin-bottom: 24px;
}

.project-detail-image img { width: 100%; height: 100%; object-fit: cover; }

.project-detail h1 { font-size: 32px; font-weight: 800; margin-bottom: 16px; }

.project-detail-description { color: var(--text-secondary); font-size: 16px; margin-bottom: 20px; }

.project-detail .tech-tags { margin-bottom: 24px; }

.project-detail-links { display: flex; flex-wrap: wrap; align-items: center; gap: 12px; }

.btn { display: inline-block; border-radius: 8px; padding: 10px 20px; font-weight: 700; font-size: 14px; }

.btn-primary { background: var(--accent); color: #fff; }

.btn-primary:hover { background: var(--accent-dark); }

.btn-secondary { background: var(--surface); color: var(--text); border: 1px solid var(--border); }

.btn-secondary:hover { border-color: var(--accent); color: var(--accent); }

.sublinks { display: flex; flex-wrap: wrap; gap: 8px; width: 100%; }

.sublink { border: 1px solid var(--border); border-radius: 8px; padding: 8px 14px; font-size: 13px; font-weight: 600; }

a.sublink:hover { border-color: var(--accent); color: var(--accent); }

.sublink-disabled { color: var(--text-secondary); opacity: 0.7; }

@media (max-width: 640px) {
  .hero { padding: 64px 0 48px; }
  .hero h1 { font-size: 30px; }
  .hero-subtitle { font-size: 16px; }
  section.page-section { padding: 40px 0; }
  section.page-section h2 { font-size: 22px; }
  .site-header .logo { font-size: 16px; }
}