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

html {
  scroll-behavior: smooth;
}

body {
  background-color: var(--md-sys-color-background);
  color: var(--md-sys-color-on-background);
  font-family: 'Roboto', sans-serif;
  transition: background-color 0.3s ease, color 0.3s ease;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

.m3-headline-large { font-size: 32px; font-weight: 400; line-height: 40px; }
.m3-headline-medium { font-size: 28px; font-weight: 400; line-height: 36px; }
.m3-title-large { font-size: 22px; font-weight: 500; line-height: 28px; }
.m3-body-large { font-size: 16px; font-weight: 400; line-height: 24px; letter-spacing: 0.5px; }
.m3-body-medium { font-size: 14px; font-weight: 400; line-height: 20px; letter-spacing: 0.25px; }
.m3-body-small { font-size: 12px; font-weight: 400; line-height: 16px; letter-spacing: 0.4px; }

.m3-navigation-bar {
  position: fixed;
  top: 0; left: 0; right: 0;
  height: 64px;
  background-color: var(--md-sys-color-surface-container);
  border-bottom: 1px solid var(--md-sys-color-outline-variant);
  z-index: 1000;
}

.nav-container {
  max-width: 1200px;
  margin: 0 auto;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 24px;
}

.nav-brand {
  display: flex;
  align-items: center;
  gap: 8px;
  color: var(--md-sys-color-primary);
}

.nav-logo {
  font-size: 20px;
  font-weight: 500;
}

.nav-links {
  display: flex;
  list-style: none;
  gap: 8px;
}

.nav-link {
  display: flex;
  align-items: center;
  gap: 8px;
  text-decoration: none;
  color: var(--md-sys-color-on-surface-variant);
  padding: 8px 16px;
  border-radius: 20px;
  font-weight: 500;
  font-size: 14px;
}

.nav-link.active {
  background-color: var(--md-sys-color-primary-container);
  color: var(--md-sys-color-on-primary-container);
}

.m3-icon-button {
  background: none;
  border: none;
  width: 40px;
  height: 40px;
  border-radius: 50%;
  color: var(--md-sys-color-on-surface-variant);
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
}

.m3-main-container {
  max-width: 1200px;
  width: 100%;
  margin: 64px auto 0;
  padding: 32px 24px;
  flex: 1;
}

.m3-section {
  padding: 24px 0 32px;
  width: 100%;
}

.section-title-wrapper {
  margin-bottom: 24px;
}

.m3-divider {
  height: 1px;
  background-color: var(--md-sys-color-outline-variant);
  width: 100%;
}

.m3-card {
  border-radius: 12px;
  padding: 16px;
  width: 100%;
  box-sizing: border-box;
}

.m3-card-filled { background-color: var(--md-sys-color-surface-container-high); }
.m3-card-elevated { background-color: var(--md-sys-color-surface-container-low); box-shadow: var(--md-sys-elevation-1); }
.m3-card-outlined { background-color: var(--md-sys-color-surface); border: 1px solid var(--md-sys-color-outline-variant); }

.profile-hero-card-custom {
  background-color: var(--md-sys-color-surface-container-high);
  border-radius: 24px;
  padding: 24px;
  margin-bottom: 24px;
  position: relative;
}

.hero-card-content {
  display: flex;
  align-items: center;
  gap: 20px;
  width: 100%;
}

.profile-avatar {
  width: 80px;
  height: 80px;
  border-radius: 50%;
  object-fit: cover;
}

.m3-badge {
  display: inline-block;
  background-color: var(--md-sys-color-primary);
  color: var(--md-sys-color-on-primary);
  font-size: 11px;
  font-weight: 500;
  padding: 4px 12px;
  border-radius: 8px;
}

.stats-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 12px;
}

.stat-card-custom {
  background-color: var(--md-sys-color-surface-container-low);
  border-radius: 12px;
  padding: 16px;
  display: flex;
  align-items: center;
  gap: 16px;
}

.stat-icon { font-size: 24px; color: var(--md-sys-color-primary); }
.stat-value { font-size: 20px; font-weight: 700; }
.stat-label { font-size: 12px; color: var(--md-sys-color-on-surface-variant); }

.repos-grid, .devs-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 16px;
  width: 100%;
}

.m3-repo-card {
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  min-height: 180px;
  height: 100%;
}

.repo-header { display: flex; justify-content: space-between; margin-bottom: 8px; }
.repo-name { color: var(--md-sys-color-on-surface); font-weight: 500; word-break: break-all; }
.repo-badge-row { display: flex; gap: 4px; }
.repo-desc { color: var(--md-sys-color-on-surface-variant); margin-bottom: 12px; flex: 1; }
.repo-footer { display: flex; justify-content: space-between; align-items: center; }
.repo-meta-group { display: flex; gap: 12px; }
.repo-meta-item { display: flex; align-items: center; gap: 4px; color: var(--md-sys-color-on-surface-variant); }
.repo-lang-dot { width: 8px; height: 8px; border-radius: 50%; }

.m3-img-loaded { opacity: 1 !important; }

.m3-img-failed {
  display: none !important;
  padding-top: 0 !important;
  height: 0 !important;
}

.port-actions {
  display: flex;
  gap: 8px;
  margin-top: auto;
  width: 100%;
}

md-filled-button, 
md-filled-tonal-button, 
md-text-button {
  min-width: auto !important;
  max-width: 100%;
  width: auto;
  --md-filled-button-leading-space: 12px;
  --md-filled-button-trailing-space: 12px;
  --md-filled-tonal-button-leading-space: 12px;
  --md-filled-tonal-button-trailing-space: 12px;
  --md-filled-button-label-text-overflow: visible;
  --md-filled-button-label-text-white-space: nowrap;
}

.port-actions md-filled-button,
.port-actions md-filled-tonal-button {
  flex: 1 1 0% !important;
  width: 100%;
  --md-filled-button-container-shape: 100px;
}

.footer-actions {
  display: flex;
  align-items: center;
  gap: 8px;
}

.footer-actions md-text-button, 
.footer-actions md-filled-tonal-button {
  flex: none !important;
  min-width: max-content !important;
  --md-filled-button-leading-space: 16px;
  --md-filled-button-trailing-space: 16px;
}

md-filled-button, 
md-filled-tonal-button {
  font-size: 13px !important;
  font-weight: 500 !important;
}

md-filled-button md-icon, 
md-filled-tonal-button md-icon {
  font-size: 16px !important;
  width: 16px !important;
  height: 16px !important;
}

.m3-dev-card { display: flex; flex-direction: column; gap: 12px; height: 100%; }
.dev-card-header { display: flex; align-items: center; gap: 12px; }
.dev-avatar-m3 { width: 56px !important; height: 56px !important; border-radius: 50% !important; object-fit: cover !important; flex-shrink: 0 !important; }
.dev-identity { display: flex; flex-direction: column; }
.dev-m3-stats { display: flex; background-color: var(--md-sys-color-surface-container); padding: 8px; border-radius: 8px; justify-content: space-around; text-align: center; margin-top: auto; }
.m3-dev-card md-filled-button { width: 100%; margin-top: 8px; }

.dev-tag-row {
  display: flex;
  gap: 6px;
  flex-wrap: wrap;
  margin-top: 4px;
}

.m3-sub-badge {
  font-size: 11px;
  padding: 2px 8px;
  border-radius: 4px;
  font-weight: 500;
  background-color: var(--md-sys-color-surface-container-high);
  color: var(--md-sys-color-on-surface-variant);
}

@keyframes m3Shimmer { 0% { background-position: -200% 0; } 100% { background-position: 200% 0; } }


.m3-footer { background-color: var(--md-sys-color-surface-container-high); border-top: 1px solid var(--md-sys-color-outline-variant); padding: 24px; margin-top: auto; }
.footer-container { max-width: 1200px; margin: 0 auto; display: flex; justify-content: space-between; align-items: center; flex-wrap: wrap; gap: 12px; }

@media (max-width: 768px) {
  .nav-links { display: none; }
  .m3-main-container { padding: 16px 12px; }
  
  .hero-card-content { flex-direction: column; text-align: center; position: relative; padding-top: 36px; }
  .profile-avatar { margin: 0 auto; }
  .m3-badge { position: absolute; top: 0; left: 0; }

  .repos-grid, .devs-grid { grid-template-columns: 1fr !important; }
  
  .port-actions { flex-direction: row !important; }
  
  .footer-container { flex-direction: column; text-align: center; gap: 16px; }
  .footer-actions { width: 100%; justify-content: center; }
  .footer-actions md-text-button, .footer-actions md-filled-tonal-button { flex: 1 !important; }
}