:root {
  /* Cream / Light Theme Palette (Matches Manuals) */
  --bg: #F7F4EF;
  --bg-gradient: radial-gradient(circle at 50% -20%, #ffffff, #F7F4EF);
  --surface: #FFFFFF;
  --surface-2: #F2EEE8;
  --surface-glass: rgba(255, 255, 255, 0.7);
  --border: #E3DDD5;
  --border-2: #D0C9BF;
  --border-glass: rgba(0, 0, 0, 0.05);
  
  /* Text */
  --text: #1A1614;
  --text-2: #4A4440;
  --text-3: #7A7068;
  
  /* Accents */
  --orange: #CF6631;
  --green: #1A6B3C;
  --red: #A4161A;
  --blue: #1B5FA8;
  --neon-blue: #1B5FA8; /* Adapted for light mode */
  --neon-orange: #CF6631; /* Adapted for light mode */

  /* Typography */
  --mono: 'JetBrains Mono', 'Fira Code', monospace;
  --sans: 'Inter', system-ui, sans-serif;
  
  /* Radii */
  --radius-sm: 6px;
  --radius: 12px;
  --radius-lg: 24px;
}

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

body {
  background: var(--bg);
  background-image: var(--bg-gradient);
  color: var(--text);
  font-family: var(--sans);
  min-height: 100vh;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

/* Background grid pattern */
body::before {
  content: '';
  position: fixed;
  inset: 0;
  background-image: linear-gradient(var(--border-glass) 1px, transparent 1px),
    linear-gradient(90deg, var(--border-glass) 1px, transparent 1px);
  background-size: 50px 50px;
  opacity: 0.2;
  z-index: -1;
  pointer-events: none;
}

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
}

/* Header / Hero */
.hero {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  padding: 100px 0 80px;
  position: relative;
}

/* Hero Badges & Avatar Layout (3 Badges Row Below Avatar) */
.avatar-container {
  position: relative;
  width: 160px;
  height: 160px;
  margin-bottom: 28px;
  animation: float 6s ease-in-out infinite;
  flex-shrink: 0;
}

.avatar {
  width: 100%;
  height: 100%;
  border-radius: 50%;
  object-fit: cover;
  border: 4px solid var(--surface);
  position: relative;
  z-index: 2;
  box-shadow: 0 0 40px rgba(27, 95, 168, 0.15);
}

/* Animations */
@keyframes float {
  0% { transform: translateY(0px); }
  50% { transform: translateY(-10px); }
  100% { transform: translateY(0px); }
}

@keyframes pulse-ring {
  0% { transform: scale(0.9); opacity: 0.5; }
  50% { opacity: 0.1; }
  100% { transform: scale(1.4); opacity: 0; }
}

.avatar-ring {
  position: absolute;
  inset: -10px;
  border-radius: 50%;
  border: 2px solid var(--neon-blue);
  z-index: 1;
  animation: pulse-ring 3s cubic-bezier(0.215, 0.61, 0.355, 1) infinite;
}

.avatar-ring:nth-child(2) {
  border-color: var(--neon-orange);
  animation-delay: 1.5s;
}

/* Badges Row Below Avatar */
.hero-badges-row {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 28px;
  margin-bottom: 36px;
  flex-wrap: wrap;
}

.cert-badge-link {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-decoration: none;
  gap: 8px;
  transition: transform 0.35s cubic-bezier(0.175, 0.885, 0.32, 1.275), filter 0.35s ease;
  animation: float 6s ease-in-out infinite;
}

.hero-badges-row .cert-badge-link:nth-child(1) {
  animation-delay: 0s;
}

.hero-badges-row .cert-badge-link:nth-child(2) {
  animation-delay: 0.6s;
}

.hero-badges-row .cert-badge-link:nth-child(3) {
  animation-delay: 1.2s;
}

.cert-badge-link:hover {
  transform: translateY(-8px) scale(1.08);
  filter: drop-shadow(0 12px 24px rgba(27, 95, 168, 0.3));
}

.cert-badge-img {
  width: 95px;
  height: 95px;
  object-fit: contain;
  filter: drop-shadow(0 8px 16px rgba(0, 0, 0, 0.12));
  transition: transform 0.3s ease;
}

.cert-badge-label {
  font-family: var(--mono);
  font-size: 0.72rem;
  font-weight: 600;
  color: var(--text-2);
  background: var(--surface-glass);
  padding: 4px 12px;
  border-radius: 9999px;
  border: 1px solid var(--border-glass);
  letter-spacing: 0.04em;
  text-transform: uppercase;
  white-space: nowrap;
  backdrop-filter: blur(10px);
}

.cert-badge-link:hover .cert-badge-label {
  color: var(--text);
  border-color: var(--blue);
  background: var(--surface-2);
}

.eyebrow {
  font-family: var(--mono);
  font-size: 0.8rem;
  color: var(--neon-blue);
  letter-spacing: 0.15em;
  text-transform: uppercase;
  margin-bottom: 16px;
  font-weight: 500;
}

.title {
  font-size: clamp(2.5rem, 5vw, 4rem);
  font-weight: 700;
  letter-spacing: -0.03em;
  line-height: 1.1;
  margin-bottom: 24px;
  color: var(--text);
}

.subtitle {
  font-size: 1.125rem;
  color: var(--text-2);
  max-width: 600px;
  margin: 0 auto 40px;
}

/* Grid */
.projects-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
  gap: 24px;
  padding-bottom: 100px;
}

/* Card */
.card {
  background: var(--surface-glass);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border: 1px solid var(--border-glass);
  border-radius: var(--radius-lg);
  padding: 32px;
  transition: transform 0.3s cubic-bezier(0.175, 0.885, 0.32, 1.275), box-shadow 0.3s ease, border-color 0.3s ease;
  position: relative;
  overflow: hidden;
  display: flex;
  flex-direction: column;
}

.card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 4px;
  background: var(--border-2);
  transition: background 0.3s ease;
}

.card:hover {
  transform: translateY(-8px);
  box-shadow: 0 20px 40px rgba(0,0,0,0.06);
  border-color: rgba(0, 0, 0, 0.1);
}

.card.theme-blue:hover::before { background: var(--blue); }
.card.theme-green:hover::before { background: var(--green); }
.card.theme-red:hover::before { background: var(--red); }
.card.theme-orange:hover::before { background: var(--orange); }
.card.theme-word:hover::before { background: #185ABD; }
.card.theme-excel:hover::before { background: #107C41; }
.card.theme-gmail:hover::before { background: #EA4335; }
.card.theme-drive:hover::before { background: #F29900; }
.card.theme-devto:hover::before { background: #0A0A0A; }

/* Filter Tabs */
.filter-wrapper {
  display: flex;
  justify-content: center;
  margin-bottom: 40px;
}

.filter-bar {
  display: inline-flex;
  flex-wrap: wrap;
  gap: 8px;
  background: var(--surface-glass);
  padding: 6px;
  border-radius: 9999px;
  border: 1px solid var(--border-glass);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.03);
}

.filter-btn {
  border: none;
  background: transparent;
  color: var(--text-2);
  font-family: var(--mono);
  font-size: 0.8125rem;
  font-weight: 500;
  padding: 8px 18px;
  border-radius: 9999px;
  cursor: pointer;
  transition: all 0.25s cubic-bezier(0.16, 1, 0.3, 1);
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

.filter-btn:hover {
  color: var(--text);
  background: var(--surface-2);
}

.filter-btn.active {
  background: var(--text);
  color: var(--bg);
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
}

/* Card Top & Badges */
.card-top {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  margin-bottom: 16px;
}

.card-icon {
  font-size: 2rem;
  line-height: 1;
  display: inline-block;
}

.badge {
  font-family: var(--mono);
  font-size: 0.6875rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  padding: 4px 10px;
  border-radius: 9999px;
  background: var(--surface-2);
  color: var(--text-2);
  border: 1px solid var(--border);
}

.badge-software { color: var(--blue); background: rgba(27, 95, 168, 0.08); border-color: rgba(27, 95, 168, 0.2); }
.badge-word { color: #185ABD; background: rgba(24, 90, 189, 0.08); border-color: rgba(24, 90, 189, 0.2); }
.badge-excel { color: #107C41; background: rgba(16, 124, 65, 0.08); border-color: rgba(16, 124, 65, 0.2); }
.badge-gmail { color: #EA4335; background: rgba(234, 67, 53, 0.08); border-color: rgba(234, 67, 53, 0.2); }
.badge-drive { color: #B26A00; background: rgba(242, 153, 0, 0.08); border-color: rgba(242, 153, 0, 0.2); }
.badge-devto { color: #0A0A0A; background: rgba(0, 0, 0, 0.07); border-color: rgba(0, 0, 0, 0.18); }

/* Article Card Additions */
.article-cover {
  width: 100%;
  height: 150px;
  object-fit: cover;
  border-radius: var(--radius);
  margin-bottom: 14px;
  border: 1px solid var(--border);
}

.article-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  font-family: var(--mono);
  font-size: 0.75rem;
  color: var(--text-3);
  margin-bottom: 10px;
}

.article-meta span {
  display: inline-flex;
  align-items: center;
  gap: 4px;
}

.article-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-bottom: 16px;
}

.tag-pill {
  font-family: var(--mono);
  font-size: 0.6875rem;
  padding: 2px 8px;
  background: var(--surface-2);
  color: var(--text-2);
  border-radius: 4px;
  border: 1px solid var(--border);
}

.card-title {
  font-size: 1.35rem;
  font-weight: 600;
  color: var(--text);
  margin-bottom: 10px;
  letter-spacing: -0.01em;
}

.card-desc {
  font-size: 0.9rem;
  color: var(--text-2);
  margin-bottom: 24px;
  flex-grow: 1;
  line-height: 1.55;
}

.card-actions {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

/* Sub-actions 3-column button grid */
.card-subactions {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 8px;
}

.btn-sub {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 4px;
  padding: 8px 6px;
  border-radius: var(--radius-sm);
  font-family: var(--mono);
  font-size: 0.72rem;
  font-weight: 500;
  text-decoration: none;
  background: var(--surface);
  color: var(--text-2);
  border: 1px solid var(--border-2);
  transition: all 0.2s ease;
  white-space: nowrap;
}

.btn-sub:hover {
  background: var(--surface-2);
  color: var(--text);
  border-color: var(--text-3);
  transform: translateY(-2px);
}

.btn-sub svg {
  width: 13px;
  height: 13px;
  flex-shrink: 0;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 11px 18px;
  border-radius: var(--radius);
  font-family: var(--mono);
  font-size: 0.8125rem;
  font-weight: 500;
  text-decoration: none;
  transition: all 0.2s ease;
  width: 100%;
}

.btn-primary {
  background: var(--text);
  color: var(--bg);
}

.btn-primary:hover {
  background: var(--text-2);
  transform: scale(1.02);
}

.btn-secondary {
  background: transparent;
  color: var(--text);
  border: 1px solid var(--border-2);
}

.btn-secondary:hover {
  background: var(--surface-2);
  border-color: var(--text-3);
  transform: scale(1.02);
}

.btn svg {
  width: 16px;
  height: 16px;
}

/* Filter animation states */
.card {
  transition: transform 0.3s cubic-bezier(0.175, 0.885, 0.32, 1.275), box-shadow 0.3s ease, border-color 0.3s ease, opacity 0.3s ease;
}

.card.is-hidden {
  display: none;
}

/* Responsive adjustments */
@media (max-width: 640px) {
  .hero {
    padding: 60px 0 40px;
  }
  
  .avatar-container {
    width: 130px;
    height: 130px;
    margin-bottom: 20px;
  }

  .hero-badges-row {
    gap: 12px;
    margin-bottom: 28px;
  }
  
  .cert-badge-img {
    width: 68px;
    height: 68px;
  }

  .cert-badge-label {
    font-size: 0.6rem;
    padding: 2px 8px;
  }
  
  .filter-bar {
    border-radius: var(--radius);
    width: 100%;
    justify-content: center;
  }
  
  .card-subactions {
    grid-template-columns: 1fr;
  }
}

/* Footer */
.footer {
  text-align: center;
  padding: 40px 0;
  border-top: 1px solid var(--border);
  font-family: var(--mono);
  font-size: 0.75rem;
  color: var(--text-3);
}