/* ==========================================================================
   Carlos Felipe - Portfolio & Curriculum Web
   CSS Variables & Design System
   ========================================================================== */

:root {
  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --font-mono: 'JetBrains Mono', monospace;
  --transition: all 0.25s cubic-bezier(0.16, 1, 0.3, 1);
}

/* Dark Theme (Default) */
[data-theme="dark"] {
  --bg-primary: #0a0d14;
  --bg-secondary: #111622;
  --bg-card: rgba(18, 24, 38, 0.85);
  --bg-card-hover: rgba(26, 34, 52, 0.95);
  --border-color: rgba(255, 255, 255, 0.08);
  --border-glow: rgba(59, 130, 246, 0.3);
  
  --text-primary: #f1f5f9;
  --text-secondary: #94a3b8;
  --text-muted: #64748b;
  
  --accent-primary: #3b82f6;
  --accent-secondary: #06b6d4;
  --accent-gradient: linear-gradient(135deg, #38bdf8 0%, #3b82f6 50%, #6366f1 100%);
  --accent-glow: rgba(59, 130, 246, 0.25);
  
  --tag-bg: rgba(59, 130, 246, 0.12);
  --tag-text: #93c5fd;
  --tag-border: rgba(59, 130, 246, 0.25);
  
  --header-bg: rgba(10, 13, 20, 0.85);
  --timeline-line: rgba(59, 130, 246, 0.25);
  --modal-bg: #111622;
}

/* Light Theme */
[data-theme="light"] {
  --bg-primary: #f8fafc;
  --bg-secondary: #f1f5f9;
  --bg-card: #ffffff;
  --bg-card-hover: #f8fafc;
  --border-color: rgba(0, 0, 0, 0.08);
  --border-glow: rgba(37, 99, 235, 0.2);
  
  --text-primary: #0f172a;
  --text-secondary: #475569;
  --text-muted: #64748b;
  
  --accent-primary: #2563eb;
  --accent-secondary: #0891b2;
  --accent-gradient: linear-gradient(135deg, #0284c7 0%, #2563eb 50%, #4f46e5 100%);
  --accent-glow: rgba(37, 99, 235, 0.15);
  
  --tag-bg: rgba(37, 99, 235, 0.08);
  --tag-text: #1d4ed8;
  --tag-border: rgba(37, 99, 235, 0.2);
  
  --header-bg: rgba(248, 250, 252, 0.9);
  --timeline-line: rgba(37, 99, 235, 0.2);
  --modal-bg: #ffffff;
}

/* --- RESET & BASE STYLES --- */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  font-size: 16px;
}

body {
  font-family: var(--font-sans);
  background-color: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.6;
  transition: background-color 0.3s ease, color 0.3s ease;
  overflow-x: hidden;
}

a {
  color: inherit;
  text-decoration: none;
  transition: var(--transition);
}

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

.container {
  width: 100%;
  max-width: 1160px;
  margin: 0 auto;
  padding: 0 1.5rem;
}

.gradient-text {
  background: var(--accent-gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  display: inline-block;
}

.section {
  padding: 5rem 0;
}

.bg-alt {
  background-color: var(--bg-secondary);
}

.section-header {
  text-align: center;
  max-width: 720px;
  margin: 0 auto 3rem auto;
}

.section-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  font-weight: 700;
  color: var(--accent-primary);
  background: var(--tag-bg);
  border: 1px solid var(--tag-border);
  padding: 0.35rem 0.9rem;
  border-radius: 9999px;
  margin-bottom: 1rem;
}

.section-title {
  font-size: 2.25rem;
  font-weight: 800;
  letter-spacing: -0.02em;
  margin-bottom: 0.75rem;
}

.section-description {
  color: var(--text-secondary);
  font-size: 1.05rem;
}

/* --- BUTTONS --- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.6rem;
  font-weight: 600;
  font-size: 0.95rem;
  padding: 0.75rem 1.4rem;
  border-radius: 10px;
  cursor: pointer;
  border: 1px solid transparent;
  transition: var(--transition);
}

.btn-primary {
  background: var(--accent-gradient);
  color: #ffffff;
  box-shadow: 0 4px 14px var(--accent-glow);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 20px var(--accent-glow);
}

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

.btn-secondary:hover {
  background: var(--bg-card-hover);
  border-color: var(--accent-primary);
  transform: translateY(-2px);
}

.btn-outline {
  background: transparent;
  color: var(--text-primary);
  border-color: var(--border-color);
}

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

.btn-icon {
  width: 44px;
  height: 44px;
  border-radius: 10px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  color: var(--text-secondary);
  font-size: 1.1rem;
}

.btn-icon:hover {
  color: var(--accent-primary);
  border-color: var(--accent-primary);
  transform: translateY(-2px);
}

.btn-block {
  width: 100%;
}

.icon-btn {
  background: transparent;
  border: 1px solid var(--border-color);
  color: var(--text-secondary);
  width: 40px;
  height: 40px;
  border-radius: 10px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: var(--transition);
  font-size: 1rem;
}

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

/* --- HEADER / NAVBAR --- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 1000;
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  background: var(--header-bg);
  border-bottom: 1px solid var(--border-color);
  padding: 0.5rem 0 0.45rem 0;
}

.header-container {
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
}

.header-top-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
}

.brand {
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: 1.2rem;
  letter-spacing: -0.03em;
  white-space: nowrap;
  flex-shrink: 0;
}

.brand-code {
  color: var(--accent-primary);
}

.nav-links {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.25rem 0.6rem;
  flex-wrap: wrap;
  list-style: none;
  border-top: 1px solid var(--border-color);
  padding-top: 0.35rem;
}

.nav-item {
  color: var(--text-secondary);
  font-weight: 500;
  font-size: 0.86rem;
  position: relative;
  padding: 0.25rem 0.6rem;
  border-radius: 8px;
  transition: var(--transition);
  white-space: nowrap;
}

.nav-item:hover {
  color: var(--accent-primary);
  background: var(--tag-bg);
}

.nav-item.active-page {
  color: var(--accent-primary);
  background: var(--tag-bg);
  font-weight: 600;
  border: 1px solid var(--tag-border);
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  flex-shrink: 0;
}

.mobile-toggle {
  display: none;
}

/* --- HERO SECTION (HOME) --- */
.hero-section {
  padding: 4.5rem 0 3rem 0;
  position: relative;
}

.hero-container {
  display: grid;
  grid-template-columns: 1.2fr 0.8fr;
  gap: 4rem;
  align-items: center;
  margin-bottom: 4rem;
}

.status-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.85rem;
  color: #10b981;
  background: rgba(16, 185, 129, 0.1);
  border: 1px solid rgba(16, 185, 129, 0.25);
  padding: 0.35rem 0.85rem;
  border-radius: 9999px;
  font-weight: 500;
  margin-bottom: 1.2rem;
}

.pulse-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background-color: #10b981;
  box-shadow: 0 0 0 0 rgba(16, 185, 129, 0.7);
  animation: pulse 2s infinite;
}

@keyframes pulse {
  0% { transform: scale(0.95); box-shadow: 0 0 0 0 rgba(16, 185, 129, 0.7); }
  70% { transform: scale(1); box-shadow: 0 0 0 7px rgba(16, 185, 129, 0); }
  100% { transform: scale(0.95); box-shadow: 0 0 0 0 rgba(16, 185, 129, 0); }
}

.hero-title {
  font-size: 3.25rem;
  font-weight: 800;
  line-height: 1.15;
  letter-spacing: -0.03em;
  margin-bottom: 0.75rem;
}

.hero-subtitle {
  font-size: 1.35rem;
  font-weight: 600;
  color: var(--accent-primary);
  margin-bottom: 1.25rem;
}

.hero-bio {
  color: var(--text-secondary);
  font-size: 1.05rem;
  margin-bottom: 1.5rem;
  line-height: 1.7;
}

.hero-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-bottom: 2rem;
}

.tag {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  font-size: 0.8rem;
  font-weight: 600;
  background: var(--tag-bg);
  color: var(--tag-text);
  border: 1px solid var(--tag-border);
  padding: 0.35rem 0.75rem;
  border-radius: 6px;
}

.hero-buttons {
  display: flex;
  align-items: center;
  gap: 0.85rem;
  flex-wrap: wrap;
  margin-bottom: 1.5rem;
}

.location-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.88rem;
  color: var(--text-muted);
}

/* Avatar Card */
.hero-media {
  display: flex;
  justify-content: center;
}

.avatar-card {
  position: relative;
  width: 320px;
  height: 320px;
}

.avatar-glow {
  position: absolute;
  inset: -10px;
  background: var(--accent-gradient);
  border-radius: 30px;
  filter: blur(25px);
  opacity: 0.35;
  z-index: 1;
}

.avatar-img {
  position: relative;
  z-index: 2;
  width: 100%;
  height: 100%;
  object-fit: cover;
  border-radius: 26px;
  border: 2px solid var(--border-glow);
  background: var(--bg-secondary);
}

.floating-badge {
  position: absolute;
  z-index: 3;
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  background: var(--bg-card);
  backdrop-filter: blur(8px);
  border: 1px solid var(--border-color);
  padding: 0.6rem 1rem;
  border-radius: 12px;
  box-shadow: 0 10px 25px rgba(0, 0, 0, 0.2);
  font-size: 0.85rem;
  font-weight: 600;
  white-space: nowrap;
}

.floating-badge i {
  color: var(--accent-primary);
}

.badge-top {
  top: -15px;
  right: -20px;
}

.badge-bottom {
  bottom: -15px;
  left: -20px;
}

/* Metrics Grid */
.metrics-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1.5rem;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: 18px;
  padding: 1.8rem;
  box-shadow: 0 8px 30px rgba(0, 0, 0, 0.05);
}

.metric-card {
  text-align: center;
  border-right: 1px solid var(--border-color);
}

.metric-card:last-child {
  border-right: none;
}

.metric-number {
  display: block;
  font-size: 2.25rem;
  font-weight: 800;
  color: var(--accent-primary);
  font-family: var(--font-mono);
  line-height: 1.2;
}

.metric-label {
  display: block;
  font-size: 0.85rem;
  color: var(--text-secondary);
  font-weight: 500;
  margin-top: 0.3rem;
}

/* --- SUBPAGE HERO (REPOSITORIES & ARTICLES) --- */
.page-hero {
  padding: 3.5rem 0 2rem 0;
  background: linear-gradient(to bottom, var(--bg-secondary), var(--bg-primary));
  border-bottom: 1px solid var(--border-color);
}

.breadcrumb {
  margin-bottom: 1.25rem;
}

.breadcrumb a {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.88rem;
  font-weight: 600;
  color: var(--text-muted);
}

.breadcrumb a:hover {
  color: var(--accent-primary);
  transform: translateX(-3px);
}

.page-title {
  font-size: 2.75rem;
  font-weight: 800;
  letter-spacing: -0.02em;
  margin-bottom: 0.75rem;
}

.page-description {
  font-size: 1.1rem;
  color: var(--text-secondary);
  max-width: 800px;
  margin-bottom: 1.5rem;
  line-height: 1.7;
}

/* --- SKILLS SECTION --- */
.filter-tabs {
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-bottom: 2.5rem;
}

.filter-btn {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  color: var(--text-secondary);
  padding: 0.5rem 1.1rem;
  border-radius: 9999px;
  font-size: 0.9rem;
  font-weight: 600;
  cursor: pointer;
  transition: var(--transition);
}

.filter-btn:hover {
  border-color: var(--accent-primary);
  color: var(--text-primary);
}

.filter-btn.active {
  background: var(--accent-primary);
  border-color: var(--accent-primary);
  color: #ffffff;
}

.skills-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
  gap: 1.25rem;
}

.skill-card {
  display: flex;
  align-items: flex-start;
  gap: 1.2rem;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: 14px;
  padding: 1.35rem;
  transition: var(--transition);
}

.skill-card:hover {
  border-color: var(--border-glow);
  background: var(--bg-card-hover);
  transform: translateY(-3px);
  box-shadow: 0 10px 25px rgba(0, 0, 0, 0.08);
}

.skill-icon {
  width: 46px;
  height: 46px;
  border-radius: 10px;
  background: var(--tag-bg);
  border: 1px solid var(--tag-border);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--accent-primary);
  font-size: 1.3rem;
  flex-shrink: 0;
}

.skill-info h3 {
  font-size: 1.05rem;
  font-weight: 700;
  margin-bottom: 0.35rem;
}

.skill-info p {
  font-size: 0.88rem;
  color: var(--text-secondary);
  line-height: 1.5;
}

/* --- EXPERIENCE TIMELINE --- */
.timeline {
  position: relative;
  max-width: 900px;
  margin: 0 auto;
  padding-left: 2rem;
}

.timeline::before {
  content: '';
  position: absolute;
  left: 0;
  top: 10px;
  bottom: 10px;
  width: 2px;
  background: var(--timeline-line);
}

.timeline-item {
  position: relative;
  margin-bottom: 2.5rem;
}

.timeline-item:last-child {
  margin-bottom: 0;
}

.timeline-dot {
  position: absolute;
  left: -2rem;
  top: 14px;
  transform: translateX(-50%);
  width: 14px;
  height: 14px;
  border-radius: 50%;
  background: var(--bg-primary);
  border: 3px solid var(--accent-primary);
  box-shadow: 0 0 10px var(--accent-primary);
}

.timeline-content {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: 16px;
  padding: 1.75rem;
  transition: var(--transition);
}

.timeline-content:hover {
  border-color: var(--border-glow);
  box-shadow: 0 8px 25px rgba(0, 0, 0, 0.08);
}

.timeline-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 1rem;
  margin-bottom: 1rem;
  flex-wrap: wrap;
}

.role-title {
  font-size: 1.25rem;
  font-weight: 700;
}

.company-name {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  color: var(--accent-primary);
  font-weight: 600;
  font-size: 0.95rem;
  margin-top: 0.2rem;
}

.timeline-period {
  text-align: right;
}

.badge-time {
  display: block;
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--text-primary);
}

.badge-loc {
  display: block;
  font-size: 0.8rem;
  color: var(--text-muted);
}

.timeline-bullets {
  list-style: none;
  margin-bottom: 1.25rem;
}

.timeline-bullets li {
  position: relative;
  padding-left: 1.4rem;
  margin-bottom: 0.5rem;
  font-size: 0.92rem;
  color: var(--text-secondary);
  line-height: 1.6;
}

.timeline-bullets li::before {
  content: '▹';
  position: absolute;
  left: 0;
  color: var(--accent-primary);
  font-weight: bold;
}

.timeline-bullets strong {
  color: var(--text-primary);
}

.timeline-text {
  color: var(--text-secondary);
  font-size: 0.92rem;
}

.tech-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
}

.tech-tags span {
  font-size: 0.75rem;
  font-family: var(--font-mono);
  background: var(--tag-bg);
  color: var(--tag-text);
  border: 1px solid var(--tag-border);
  padding: 0.2rem 0.6rem;
  border-radius: 6px;
}

/* --- REPOSITORIES (PAGE & SHOWCASE) --- */
.repo-filter-bar {
  display: flex;
  gap: 1.2rem;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 1.5rem;
  flex-wrap: wrap;
}

.search-box {
  position: relative;
  flex: 1;
  min-width: 280px;
  max-width: 500px;
}

.search-box i {
  position: absolute;
  left: 14px;
  top: 50%;
  transform: translateY(-50%);
  color: var(--text-muted);
}

.search-box input {
  width: 100%;
  padding: 0.75rem 1rem 0.75rem 2.6rem;
  border-radius: 10px;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  color: var(--text-primary);
  font-family: var(--font-sans);
  font-size: 0.92rem;
  outline: none;
  transition: var(--transition);
}

.search-box input:focus {
  border-color: var(--accent-primary);
  box-shadow: 0 0 0 3px var(--accent-glow);
}

.repo-lang-filters {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
}

.repo-results-info {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 1.5rem;
  font-size: 0.9rem;
  color: var(--text-muted);
  flex-wrap: wrap;
  gap: 0.5rem;
}

.external-github-link {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  color: var(--accent-primary);
  font-weight: 600;
}

.external-github-link:hover {
  text-decoration: underline;
}

.repos-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(330px, 1fr));
  gap: 1.35rem;
}

.repo-card {
  display: flex;
  flex-direction: column;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: 14px;
  padding: 1.4rem;
  transition: var(--transition);
}

.repo-card:hover {
  border-color: var(--border-glow);
  transform: translateY(-3px);
  box-shadow: 0 10px 25px rgba(0, 0, 0, 0.08);
}

.repo-header {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 0.8rem;
  margin-bottom: 0.75rem;
}

.repo-title-wrap {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.repo-title-wrap i {
  color: var(--accent-primary);
  font-size: 1.1rem;
}

.repo-name {
  font-size: 1.05rem;
  font-weight: 700;
  font-family: var(--font-mono);
  color: var(--accent-primary);
  word-break: break-all;
}

.repo-name:hover {
  text-decoration: underline;
}

.repo-desc {
  font-size: 0.88rem;
  color: var(--text-secondary);
  line-height: 1.5;
  margin-bottom: 1.25rem;
  flex-grow: 1;
}

.repo-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 0.8rem;
  color: var(--text-muted);
  border-top: 1px solid var(--border-color);
  padding-top: 0.75rem;
}

.repo-lang {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  font-weight: 600;
  color: var(--text-secondary);
}

.repo-lang-dot {
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: var(--accent-primary);
}

.repo-stats {
  display: flex;
  gap: 0.8rem;
}

.repo-stat-item {
  display: inline-flex;
  align-items: center;
  gap: 0.3rem;
}

.showcase-action {
  text-align: center;
  margin-top: 2.5rem;
}

/* Repo Skeletons */
.repo-card-skeleton {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: 14px;
  padding: 1.4rem;
}

.skeleton-line {
  height: 16px;
  background: linear-gradient(90deg, rgba(255,255,255,0.05) 25%, rgba(255,255,255,0.12) 50%, rgba(255,255,255,0.05) 75%);
  border-radius: 6px;
  margin-bottom: 0.8rem;
  animation: shimmer 1.6s infinite;
}

.skeleton-line.title { width: 60%; height: 20px; }
.skeleton-line.desc { width: 90%; height: 14px; }
.skeleton-line.meta { width: 40%; height: 12px; margin-bottom: 0; }

@keyframes shimmer {
  0% { opacity: 0.6; }
  50% { opacity: 1; }
  100% { opacity: 0.6; }
}

/* --- ARTICLES (PAGE & SHOWCASE) --- */
.articles-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(330px, 1fr));
  gap: 1.5rem;
}

.article-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: 16px;
  padding: 1.75rem;
  display: flex;
  flex-direction: column;
  transition: var(--transition);
}

.article-card:hover {
  border-color: var(--border-glow);
  transform: translateY(-3px);
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.08);
}

.article-meta {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 1rem;
  gap: 0.5rem;
  flex-wrap: wrap;
}

.article-badge {
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  padding: 0.25rem 0.65rem;
  border-radius: 6px;
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
}

.badge-sec {
  background: rgba(239, 68, 68, 0.12);
  color: #f87171;
  border: 1px solid rgba(239, 68, 68, 0.25);
}

.badge-devops {
  background: rgba(16, 185, 129, 0.12);
  color: #34d399;
  border: 1px solid rgba(16, 185, 129, 0.25);
}

.badge-cloud {
  background: rgba(59, 130, 246, 0.12);
  color: #60a5fa;
  border: 1px solid rgba(59, 130, 246, 0.25);
}

.article-date {
  font-size: 0.8rem;
  color: var(--text-muted);
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
}

.article-title {
  font-size: 1.25rem;
  font-weight: 700;
  line-height: 1.35;
  margin-bottom: 0.85rem;
}

.article-excerpt {
  color: var(--text-secondary);
  font-size: 0.92rem;
  line-height: 1.6;
  margin-bottom: 1.5rem;
  flex-grow: 1;
}

.article-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  border-top: 1px solid var(--border-color);
  padding-top: 1rem;
  gap: 0.5rem;
  flex-wrap: wrap;
}

.article-tags {
  display: flex;
  gap: 0.4rem;
  flex-wrap: wrap;
}

.article-tags span {
  font-size: 0.75rem;
  font-family: var(--font-mono);
  color: var(--text-muted);
}

.read-article-btn {
  background: transparent;
  border: none;
  color: var(--accent-primary);
  font-weight: 600;
  font-size: 0.88rem;
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  cursor: pointer;
  transition: var(--transition);
  padding: 0.3rem 0;
}

.read-article-btn:hover {
  transform: translateX(3px);
  color: #38bdf8;
}

/* --- ARTICLE READER MODAL --- */
.modal-backdrop {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.75);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  z-index: 2000;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 1.5rem;
  opacity: 0;
  visibility: hidden;
  transition: var(--transition);
}

.modal-backdrop.show {
  opacity: 1;
  visibility: visible;
}

.modal-dialog {
  background: var(--modal-bg);
  border: 1px solid var(--border-glow);
  border-radius: 20px;
  width: 100%;
  max-width: 780px;
  max-height: 85vh;
  overflow-y: auto;
  padding: 2.25rem;
  box-shadow: 0 20px 50px rgba(0, 0, 0, 0.4);
  transform: scale(0.95);
  transition: var(--transition);
}

.modal-backdrop.show .modal-dialog {
  transform: scale(1);
}

.modal-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 1.25rem;
}

.modal-badge {
  font-size: 0.8rem;
  font-weight: 700;
  text-transform: uppercase;
  color: var(--accent-primary);
}

.modal-close-btn {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  color: var(--text-secondary);
  width: 36px;
  height: 36px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  font-size: 1.1rem;
  transition: var(--transition);
}

.modal-close-btn:hover {
  color: var(--text-primary);
  border-color: var(--accent-primary);
}

.modal-title {
  font-size: 1.7rem;
  font-weight: 800;
  line-height: 1.25;
  margin-bottom: 0.6rem;
}

.modal-meta {
  font-size: 0.88rem;
  color: var(--text-muted);
}

.modal-divider {
  height: 1px;
  background: var(--border-color);
  margin: 1.5rem 0;
}

.modal-body {
  font-size: 1rem;
  color: var(--text-secondary);
  line-height: 1.75;
}

.modal-body h4 {
  color: var(--text-primary);
  font-size: 1.2rem;
  font-weight: 700;
  margin: 1.5rem 0 0.6rem 0;
}

.modal-body p {
  margin-bottom: 1rem;
}

.modal-body ul {
  margin-bottom: 1.25rem;
  padding-left: 1.25rem;
}

.modal-body li {
  margin-bottom: 0.4rem;
}

.modal-body pre {
  background: #060910;
  border: 1px solid rgba(255, 255, 255, 0.1);
  padding: 1rem;
  border-radius: 10px;
  font-family: var(--font-mono);
  font-size: 0.85rem;
  color: #38bdf8;
  overflow-x: auto;
  margin: 1rem 0;
}

/* --- EDUCATION & CERTS --- */
.edu-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.5rem;
  margin-bottom: 3.5rem;
}

.edu-card {
  display: flex;
  gap: 1.25rem;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: 16px;
  padding: 1.75rem;
}

.highlight-card {
  border-color: var(--border-glow);
  box-shadow: 0 8px 30px var(--accent-glow);
}

.edu-icon {
  width: 50px;
  height: 50px;
  border-radius: 12px;
  background: var(--tag-bg);
  border: 1px solid var(--tag-border);
  color: var(--accent-primary);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.4rem;
  flex-shrink: 0;
}

.edu-period {
  font-size: 0.8rem;
  font-weight: 700;
  color: var(--accent-primary);
  text-transform: uppercase;
}

.edu-info h3 {
  font-size: 1.15rem;
  font-weight: 700;
  margin: 0.2rem 0 0.4rem 0;
}

.edu-school {
  font-weight: 600;
  font-size: 0.95rem;
  color: var(--text-secondary);
  margin-bottom: 0.5rem;
}

.edu-desc {
  font-size: 0.88rem;
  color: var(--text-muted);
}

.subheading {
  font-size: 1.4rem;
  font-weight: 700;
  text-align: center;
  margin-bottom: 1.75rem;
}

.certs-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 1.2rem;
}

.cert-item {
  display: flex;
  align-items: center;
  gap: 1rem;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: 12px;
  padding: 1.1rem;
}

.cert-icon {
  font-size: 1.5rem;
  color: var(--accent-primary);
  width: 40px;
  text-align: center;
}

.cert-item strong {
  display: block;
  font-size: 0.95rem;
  margin-bottom: 0.15rem;
}

.cert-item span {
  display: block;
  font-size: 0.82rem;
  color: var(--text-secondary);
}

/* --- CONTACT SECTION --- */
.contact-box {
  display: grid;
  grid-template-columns: 1.3fr 0.9fr;
  gap: 3rem;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: 20px;
  padding: 3rem;
  box-shadow: 0 15px 40px rgba(0, 0, 0, 0.08);
}

.contact-title {
  font-size: 1.85rem;
  font-weight: 800;
  letter-spacing: -0.02em;
  margin: 0.75rem 0 1rem 0;
}

.contact-text p {
  color: var(--text-secondary);
  font-size: 1rem;
  margin-bottom: 2rem;
}

.contact-links-list {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.contact-link-item {
  display: flex;
  align-items: center;
  gap: 1rem;
  padding: 0.9rem 1.2rem;
  background: var(--bg-primary);
  border: 1px solid var(--border-color);
  border-radius: 12px;
}

.contact-link-item > i {
  font-size: 1.3rem;
  color: var(--accent-primary);
  width: 24px;
}

.item-label {
  display: block;
  font-size: 0.75rem;
  text-transform: uppercase;
  color: var(--text-muted);
  font-weight: 700;
}

.contact-link-item a {
  font-weight: 600;
  font-size: 0.95rem;
}

.contact-link-item a:hover {
  color: var(--accent-primary);
}

.btn-copy {
  margin-left: auto;
  background: var(--tag-bg);
  border: 1px solid var(--tag-border);
  color: var(--tag-text);
  padding: 0.35rem 0.75rem;
  border-radius: 8px;
  font-size: 0.8rem;
  font-weight: 600;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  transition: var(--transition);
}

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

.btn-external {
  margin-left: auto;
  color: var(--text-muted);
  font-size: 0.9rem;
}

.btn-external:hover {
  color: var(--accent-primary);
}

.contact-cta-card {
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  text-align: center;
  background: var(--bg-primary);
  border: 1px dashed var(--border-glow);
  border-radius: 16px;
  padding: 2.5rem;
}

.contact-cta-card h3 {
  font-size: 1.3rem;
  font-weight: 700;
  margin-bottom: 0.75rem;
}

.contact-cta-card p {
  color: var(--text-secondary);
  font-size: 0.92rem;
  margin-bottom: 1.75rem;
}

.cta-note {
  display: flex;
  align-items: center;
  gap: 0.4rem;
  font-size: 0.8rem;
  color: var(--text-muted);
  margin-top: 1rem;
}

/* --- FOOTER --- */
.site-footer {
  border-top: 1px solid var(--border-color);
  background: var(--bg-secondary);
  padding: 3.5rem 0 0 0;
  margin-top: 3rem;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.6fr 1fr 1fr;
  gap: 2.5rem;
  padding-bottom: 2.5rem;
}

.footer-col-brand .brand {
  font-size: 1.3rem;
  margin-bottom: 0.75rem;
  display: inline-block;
}

.footer-tagline {
  color: var(--text-secondary);
  font-size: 0.92rem;
  line-height: 1.65;
  max-width: 380px;
}

.footer-heading {
  font-size: 0.82rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  font-weight: 700;
  color: var(--accent-primary);
  margin-bottom: 1.15rem;
}

.footer-nav-links {
  display: flex;
  flex-direction: column;
  gap: 0.6rem;
}

.footer-nav-links a {
  color: var(--text-secondary);
  font-size: 0.9rem;
  transition: var(--transition);
  display: inline-flex;
  align-items: center;
  gap: 0.3rem;
}

.footer-nav-links a:hover {
  color: var(--accent-primary);
  transform: translateX(3px);
}

.footer-social-icons {
  display: flex;
  gap: 0.75rem;
  flex-wrap: wrap;
}

.footer-icon-btn {
  width: 44px;
  height: 44px;
  border-radius: 12px;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  color: var(--text-secondary);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-size: 1.25rem;
  transition: var(--transition);
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.05);
}

.footer-icon-btn:hover {
  color: #ffffff;
  background: var(--accent-primary);
  border-color: var(--accent-primary);
  transform: translateY(-3px);
  box-shadow: 0 6px 16px var(--accent-glow);
}

.footer-bottom-bar {
  border-top: 1px solid var(--border-color);
  padding: 1.25rem 0;
  background: var(--bg-primary);
}

.footer-bottom-container {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 1rem;
  font-size: 0.85rem;
  color: var(--text-muted);
}

.footer-status-pill {
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
  font-size: 0.8rem;
  color: var(--text-secondary);
  background: var(--tag-bg);
  border: 1px solid var(--tag-border);
  padding: 0.25rem 0.65rem;
  border-radius: 9999px;
}

@media (max-width: 992px) {
  .footer-grid {
    grid-template-columns: 1fr;
    gap: 2rem;
  }
  .footer-tagline {
    max-width: 100%;
  }
}

/* --- TOAST NOTIFICATION --- */
.toast {
  position: fixed;
  bottom: 25px;
  right: 25px;
  background: #10b981;
  color: #ffffff;
  padding: 0.8rem 1.4rem;
  border-radius: 10px;
  box-shadow: 0 10px 25px rgba(0, 0, 0, 0.2);
  font-weight: 600;
  font-size: 0.9rem;
  transform: translateY(100px);
  opacity: 0;
  visibility: hidden;
  transition: var(--transition);
  z-index: 9999;
}

.toast.show {
  transform: translateY(0);
  opacity: 1;
  visibility: visible;
}

/* --- RESPONSIVE STYLES --- */
@media (max-width: 992px) {
  .hero-container {
    grid-template-columns: 1fr;
    text-align: center;
    gap: 3rem;
  }
  
  .hero-title {
    font-size: 2.75rem;
  }
  
  .hero-content {
    display: flex;
    flex-direction: column;
    align-items: center;
  }
  
  .hero-tags, .hero-buttons {
    justify-content: center;
  }
  
  .metrics-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 1.5rem;
  }
  
  .metric-card:nth-child(2) {
    border-right: none;
  }
  
  .metric-card:nth-child(3) {
    border-top: 1px solid var(--border-color);
    padding-top: 1.5rem;
  }
  
  .metric-card:nth-child(4) {
    border-top: 1px solid var(--border-color);
    border-right: none;
    padding-top: 1.5rem;
  }
  
  .contact-box {
    grid-template-columns: 1fr;
    padding: 2rem;
  }
  
  .edu-grid {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 768px) {
  .site-header {
    padding: 0.65rem 0;
  }

  .nav-links {
    position: fixed;
    top: 60px;
    left: 0;
    right: 0;
    background: var(--bg-card);
    flex-direction: column;
    padding: 1.5rem;
    gap: 1rem;
    border-top: none;
    border-bottom: 1px solid var(--border-color);
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.15);
    transform: translateY(-150%);
    transition: var(--transition);
  }
  
  .nav-links.active {
    transform: translateY(0);
  }
  
  .mobile-toggle {
    display: inline-flex;
  }
  
  .hero-title, .page-title {
    font-size: 2.2rem;
  }
  
  .avatar-card {
    width: 250px;
    height: 250px;
  }
  
  .floating-badge {
    padding: 0.4rem 0.75rem;
    font-size: 0.75rem;
  }
  
  .timeline {
    padding-left: 1.5rem;
  }
  
  .timeline-dot {
    left: -1.5rem;
  }
  
  .timeline-header {
    flex-direction: column;
    gap: 0.4rem;
  }
  
  .timeline-period {
    text-align: left;
  }
  
  .footer-container {
    flex-direction: column;
    text-align: center;
  }
  
  .modal-dialog {
    padding: 1.5rem;
  }
}

/* --- PRINT STYLES FOR RESUME SAVING --- */
@media print {
  body {
    background: #fff !important;
    color: #000 !important;
  }
  
  .site-header, .hero-buttons, .filter-tabs, .btn-copy, .btn-external, .site-footer, .header-actions, .repo-filter-bar, .modal-backdrop, .breadcrumb, .showcase-action {
    display: none !important;
  }
  
  .section {
    padding: 1.5rem 0 !important;
  }
  
  .card, .skill-card, .timeline-content, .edu-card, .repo-card, .article-card {
    border: 1px solid #ddd !important;
    box-shadow: none !important;
  }
}

/* ==========================================================================
   STANDALONE ARTICLE & ARCHITECTURE SHOWCASE STYLES
   ========================================================================== */
.article-hero {
  padding: 5rem 0 2.5rem 0;
  background: var(--bg-secondary);
  border-bottom: 1px solid var(--border-color);
}

.article-container {
  max-width: 860px;
}

.breadcrumb-separator {
  margin: 0 0.5rem;
  color: var(--text-muted);
}

.article-header-meta {
  display: flex;
  align-items: center;
  gap: 1rem;
  margin: 1.25rem 0 1rem 0;
  flex-wrap: wrap;
}

.single-article-title {
  font-size: 2.35rem;
  font-weight: 800;
  line-height: 1.25;
  margin-bottom: 1rem;
  color: var(--text-primary);
}

.single-article-subtitle {
  font-size: 1.15rem;
  color: var(--text-secondary);
  line-height: 1.6;
  margin-bottom: 1.75rem;
}

.author-meta-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: 1.25rem;
  border-top: 1px solid var(--border-color);
  gap: 1rem;
  flex-wrap: wrap;
}

.author-avatar-group {
  display: flex;
  align-items: center;
  gap: 0.85rem;
}

.author-mini-img {
  width: 44px;
  height: 44px;
  border-radius: 50%;
  object-fit: cover;
  border: 2px solid var(--accent-primary);
}

.author-name {
  display: block;
  font-weight: 700;
  font-size: 0.95rem;
  color: var(--text-primary);
}

.author-role {
  display: block;
  font-size: 0.8rem;
  color: var(--text-muted);
}

.article-share-buttons {
  display: flex;
  gap: 0.5rem;
  align-items: center;
}

.btn-sm {
  padding: 0.4rem 0.85rem;
  font-size: 0.82rem;
  border-radius: 8px;
}

.article-content-section {
  padding: 3.5rem 0 5rem 0;
}

.single-article-content {
  font-size: 1.05rem;
  line-height: 1.8;
  color: var(--text-secondary);
}

.single-article-content h2 {
  font-size: 1.6rem;
  font-weight: 800;
  color: var(--text-primary);
  margin: 2.5rem 0 1rem 0;
  padding-bottom: 0.5rem;
  border-bottom: 1px solid var(--border-color);
}

.single-article-content h3 {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--text-primary);
  margin: 1.75rem 0 0.75rem 0;
}

.single-article-content p {
  margin-bottom: 1.35rem;
}

.single-article-content ul, .single-article-content ol {
  margin-bottom: 1.5rem;
  padding-left: 1.5rem;
}

.single-article-content li {
  margin-bottom: 0.5rem;
}

.single-article-content pre {
  background: #0d1117;
  border: 1px solid var(--border-color);
  border-radius: 12px;
  padding: 1.25rem;
  overflow-x: auto;
  margin: 1.5rem 0;
}

[data-theme="light"] .single-article-content pre {
  background: #1e293b;
}

.single-article-content code {
  font-family: var(--font-mono);
  font-size: 0.88rem;
  color: #e2e8f0;
}

.single-article-content p code, .single-article-content li code {
  background: var(--tag-bg);
  color: var(--tag-text);
  padding: 0.15rem 0.4rem;
  border-radius: 4px;
  font-size: 0.88rem;
  border: 1px solid var(--tag-border);
}

.article-highlight-box {
  background: var(--bg-card);
  border-left: 4px solid var(--accent-primary);
  border-radius: 0 12px 12px 0;
  padding: 1.25rem 1.5rem;
  margin-bottom: 2rem;
  display: flex;
  gap: 1rem;
  align-items: flex-start;
  color: var(--text-primary);
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.05);
}

.article-highlight-box i {
  color: var(--accent-primary);
  font-size: 1.4rem;
  margin-top: 0.2rem;
  flex-shrink: 0;
}

.article-steps-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 1.25rem;
  margin: 1.75rem 0;
}

.step-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: 12px;
  padding: 1.25rem;
  transition: var(--transition);
}

.step-card:hover {
  border-color: var(--border-glow);
  transform: translateY(-2px);
}

.step-icon {
  font-size: 1.5rem;
  color: var(--accent-primary);
  margin-bottom: 0.75rem;
}

.step-card h3 {
  font-size: 1.05rem;
  margin: 0 0 0.5rem 0;
  color: var(--text-primary);
}

.step-card p {
  font-size: 0.88rem;
  color: var(--text-secondary);
  line-height: 1.5;
  margin-bottom: 0;
}

.article-callout {
  border-radius: 12px;
  padding: 1.35rem 1.5rem;
  margin: 2rem 0;
  border: 1px solid var(--border-color);
}

.article-callout.success {
  background: rgba(16, 185, 129, 0.08);
  border-color: rgba(16, 185, 129, 0.25);
}

.article-callout.success h4 {
  color: #34d399;
  font-size: 1.1rem;
  font-weight: 700;
  margin-bottom: 0.5rem;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.article-tags-section {
  margin-top: 2.5rem;
  padding-top: 1.5rem;
  border-top: 1px solid var(--border-color);
  display: flex;
  align-items: center;
  gap: 1rem;
  flex-wrap: wrap;
}

.tags-title {
  font-weight: 700;
  font-size: 0.9rem;
  color: var(--text-primary);
}

.tags-list {
  display: flex;
  gap: 0.5rem;
  flex-wrap: wrap;
}

.article-author-card {
  margin-top: 4rem;
  background: var(--bg-card);
  border: 1px solid var(--border-glow);
  border-radius: 20px;
  padding: 2rem;
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
}

.author-card-content {
  display: flex;
  align-items: center;
  gap: 2rem;
}

.author-large-img {
  width: 90px;
  height: 90px;
  border-radius: 50%;
  object-fit: cover;
  border: 3px solid var(--accent-primary);
  flex-shrink: 0;
}

.author-bio-wrap h3 {
  font-size: 1.25rem;
  font-weight: 800;
  margin-bottom: 0.4rem;
  color: var(--text-primary);
}

.author-summary {
  font-size: 0.92rem;
  color: var(--text-secondary);
  line-height: 1.6;
  margin-bottom: 1.2rem;
}

.author-links {
  display: flex;
  gap: 0.6rem;
  flex-wrap: wrap;
}

/* Architecture Showcase Cards on index.html */
.architecture-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: 1.75rem;
  margin-top: 2rem;
}

.arch-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: 18px;
  padding: 2rem;
  display: flex;
  flex-direction: column;
  transition: var(--transition);
  position: relative;
  overflow: hidden;
}

.arch-card:hover {
  border-color: var(--border-glow);
  transform: translateY(-4px);
  box-shadow: 0 15px 35px rgba(0, 0, 0, 0.12);
}

.arch-icon {
  width: 52px;
  height: 52px;
  border-radius: 14px;
  background: var(--tag-bg);
  border: 1px solid var(--tag-border);
  color: var(--accent-primary);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
  margin-bottom: 1.25rem;
}

.arch-title {
  font-size: 1.25rem;
  font-weight: 700;
  margin-bottom: 0.75rem;
  color: var(--text-primary);
}

.arch-desc {
  font-size: 0.92rem;
  color: var(--text-secondary);
  line-height: 1.6;
  margin-bottom: 1.5rem;
  flex-grow: 1;
}

.arch-techs {
  display: flex;
  gap: 0.45rem;
  flex-wrap: wrap;
  margin-bottom: 1.25rem;
}

.arch-techs span {
  font-size: 0.75rem;
  font-family: var(--font-mono);
  background: rgba(255, 255, 255, 0.04);
  padding: 0.2rem 0.5rem;
  border-radius: 6px;
  border: 1px solid var(--border-color);
  color: var(--text-secondary);
}

[data-theme="light"] .arch-techs span {
  background: rgba(0, 0, 0, 0.04);
}