/* ==========================================================================
   Modern Portfolio Design System — Tailwind CSS v4
   Author: Daniel Artola
   ========================================================================== */

/* --------------------------------------------------------------------------
   Light Theme Variables (Defaults)
   -------------------------------------------------------------------------- */
:root {
  --color-bg-primary: #f8fafc;
  --color-bg-secondary: #e2e8f0;
  --color-bg-card: rgba(255, 255, 255, 0.7);
  --color-text-primary: #0f172a;
  --color-text-secondary: #475569;
  --color-text-muted: #64748b;
  --color-accent-primary: #4f46e5;
  --color-accent-secondary: #8b5cf6;
  --color-border: rgba(148, 163, 184, 0.3);
  --color-glass-bg: rgba(255, 255, 255, 0.6);
  --color-glass-border: rgba(255, 255, 255, 0.4);
  --color-shadow: rgba(15, 23, 42, 0.08);
  --color-orb-1: rgba(99, 102, 241, 0.3);
  --color-orb-2: rgba(139, 92, 246, 0.25);
  --color-orb-3: rgba(168, 85, 247, 0.2);
}

/* --------------------------------------------------------------------------
   Base Box Sizing Reset
   -------------------------------------------------------------------------- */
*, *::before, *::after {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

/* --------------------------------------------------------------------------
   Dark Theme Variable Overrides
   -------------------------------------------------------------------------- */
[data-theme="dark"] {
  --color-bg-primary: #0a0a0f;
  --color-bg-secondary: #12121a;
  --color-bg-card: rgba(20, 20, 30, 0.8);
  --color-text-primary: #f1f5f9;
  --color-text-secondary: #94a3b8;
  --color-text-muted: #64748b;
  --color-accent-primary: #818cf8;
  --color-accent-secondary: #a78bfa;
  --color-border: rgba(148, 163, 184, 0.1);
  --color-glass-bg: rgba(20, 20, 35, 0.7);
  --color-glass-border: rgba(255, 255, 255, 0.08);
  --color-shadow: rgba(0, 0, 0, 0.3);
  --color-orb-1: rgba(129, 140, 248, 0.15);
  --color-orb-2: rgba(167, 139, 250, 0.12);
  --color-orb-3: rgba(192, 132, 252, 0.1);
}

/* --------------------------------------------------------------------------
   Base Styles
   -------------------------------------------------------------------------- */
html {
  scroll-behavior: smooth;
  font-size: 16px;
}

body {
  font-family: "Inter", system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  background-color: var(--color-bg-primary);
  color: var(--color-text-primary);
  line-height: 1.7;
  min-height: 100vh;
  overflow-x: hidden;
  transition: background-color 0.5s ease, color 0.5s ease;
}

h1, h2, h3, h4, h5, h6 {
  font-weight: 700;
  line-height: 1.2;
  letter-spacing: -0.02em;
}

h1 {
  font-size: clamp(2.5rem, 5vw, 4rem);
  background: linear-gradient(135deg, var(--color-accent-primary) 0%, var(--color-accent-secondary) 50%, #a855f7 100%);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}

[data-theme="dark"] h1 {
  background: linear-gradient(135deg, #818cf8 0%, #a78bfa 50%, #c084fc 100%);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}

h2 {
  font-size: clamp(1.75rem, 3vw, 2.5rem);
  color: var(--color-text-primary);
  margin-bottom: 2rem;
  display: flex;
  align-items: center;
  gap: 1rem;
}

h2 i {
  color: var(--color-accent-primary);
  font-size: 0.9em;
}

h3 {
  font-size: clamp(1.25rem, 2vw, 1.5rem);
  margin-bottom: 1rem;
}

p {
  color: var(--color-text-secondary);
  font-size: 1.1rem;
}

a {
  color: var(--color-accent-primary);
  text-decoration: none;
  transition: color 0.15s ease;
}

a:hover {
  color: var(--color-accent-secondary);
}

main[tabindex="-1"] {
  outline: none;
}

footer {
  padding: 2rem 0;
  text-align: center;
  border-top: 1px solid var(--color-border);
}

footer p {
  font-size: 0.9rem;
  color: var(--color-text-muted);
}

/* --------------------------------------------------------------------------
   Layout
   -------------------------------------------------------------------------- */
.container {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 2rem;
}

section {
  padding: 4rem 0;
  position: relative;
}

/* --------------------------------------------------------------------------
   Animated Background
   -------------------------------------------------------------------------- */
.bg-orbs {
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: -1;
  overflow: hidden;
}

.orb {
  position: absolute;
  border-radius: 50%;
  filter: blur(80px);
  animation: float 20s ease-in-out infinite;
  will-change: transform;
}

.orb-1 {
  width: 600px;
  height: 600px;
  background: var(--color-orb-1);
  top: -200px;
  right: -100px;
  animation-delay: 0s;
}

.orb-2 {
  width: 500px;
  height: 500px;
  background: var(--color-orb-2);
  bottom: -150px;
  left: -100px;
  animation-delay: -7s;
}

.orb-3 {
  width: 400px;
  height: 400px;
  background: var(--color-orb-3);
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  animation-delay: -14s;
}

@keyframes float {
  0%, 100% { transform: translate(0, 0) scale(1); }
  25% { transform: translate(30px, -30px) scale(1.05); }
  50% { transform: translate(-20px, 20px) scale(0.95); }
  75% { transform: translate(20px, 10px) scale(1.02); }
}

/* --------------------------------------------------------------------------
   Navigation
   -------------------------------------------------------------------------- */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  padding: 1rem 0;
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  background: var(--color-glass-bg);
  border-bottom: 1px solid var(--color-glass-border);
  transition: all 0.3s ease;
}

.navbar.scrolled {
  padding: 0.5rem 0;
  box-shadow: 0 4px 30px var(--color-shadow);
}

.nav-container {
  display: flex;
  justify-content: space-between;
  align-items: center;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 2rem;
}

.nav-logo {
  font-weight: 700;
  font-size: 1.25rem;
  background: linear-gradient(135deg, var(--color-accent-primary) 0%, var(--color-accent-secondary) 50%, #a855f7 100%);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}

[data-theme="dark"] .nav-logo {
  background: linear-gradient(135deg, #818cf8 0%, #a78bfa 50%, #c084fc 100%);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}

.nav-links {
  display: flex;
  gap: 1.5rem;
  list-style: none;
}

.nav-links a {
  color: var(--color-text-secondary);
  font-weight: 500;
  font-size: 0.95rem;
  padding: 0.5rem 1rem;
  border-radius: 0.75rem;
  transition: all 0.15s ease;
  position: relative;
}

.nav-links a::after {
  content: "";
  position: absolute;
  bottom: 0;
  left: 50%;
  width: 0;
  height: 2px;
  background: linear-gradient(135deg, var(--color-accent-primary), var(--color-accent-secondary));
  transition: all 0.3s ease;
  transform: translateX(-50%);
}

.nav-links a:hover {
  color: var(--color-text-primary);
}

.nav-links a:hover::after {
  width: 80%;
}

.nav-controls {
  display: flex;
  align-items: center;
  gap: 1rem;
}

.nav-links .nav-cta {
  background: linear-gradient(135deg, var(--color-accent-primary), var(--color-accent-secondary));
  color: white;
  padding: 0.5rem 2rem;
  border-radius: 9999px;
  box-shadow: 0 4px 15px rgba(99, 102, 241, 0.3);
  transition: all 0.3s ease;
}

.nav-links .nav-cta::after {
  display: none;
}

.nav-links .nav-cta:hover {
  color: white;
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(99, 102, 241, 0.4);
}

.control-link {
  color: var(--color-text-secondary);
  font-size: 1.25rem;
  transition: all 0.3s ease;
  display: flex;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
  border-radius: 9999px;
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
}

.control-link:hover {
  color: var(--color-accent-primary);
  background: var(--color-glass-bg);
  transform: translateY(-2px);
}

/* Theme Toggle */
.theme-toggle {
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: 9999px;
  padding: 0.5rem;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
  transition: all 0.3s ease;
  color: var(--color-text-secondary);
}

.theme-toggle:hover {
  background: var(--color-accent-primary);
  color: white;
  transform: rotate(180deg);
}

.theme-toggle i {
  font-size: 1.2rem;
}

/* Language Switcher */
.language-switcher {
  display: inline-flex;
  align-items: center;
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: 9999px;
  padding: 6px;
  gap: 6px;
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
}

.language-switcher .lang-btn,
.language-switcher a,
.language-switcher span {
  padding: 10px 22px;
  border-radius: 9999px;
  color: var(--color-text-secondary);
  font-size: 0.85rem;
  font-weight: 700;
  transition: all 0.15s ease;
  text-decoration: none;
  border: none;
  background: transparent;
  cursor: pointer;
  letter-spacing: 0.05em;
  line-height: 1;
}

.language-switcher .lang-btn:hover,
.language-switcher a:hover {
  color: var(--color-text-primary);
  background: rgba(255, 255, 255, 0.05);
}

.language-switcher .active,
.language-switcher span.active {
  background: linear-gradient(135deg, var(--color-accent-primary), var(--color-accent-secondary));
  color: white !important;
  box-shadow: 0 2px 10px rgba(99, 102, 241, 0.3);
}

/* Mobile Menu */
.menu-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 0.5rem;
}

.menu-toggle span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--color-text-primary);
  transition: all 0.3s ease;
}

/* --------------------------------------------------------------------------
   Hero Section
   -------------------------------------------------------------------------- */
.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding-top: 80px;
  text-align: center;
}

.hero-content {
  max-width: 800px;
}

.hero-subtitle {
  font-size: clamp(1.1rem, 2vw, 1.4rem);
  color: var(--color-text-secondary);
  margin-bottom: 2rem;
  opacity: 0;
  animation: fadeInUp 0.8s ease 0.2s forwards;
}

.hero-title {
  margin-bottom: 1.5rem;
  opacity: 0;
  animation: fadeInUp 0.8s ease forwards;
}

/* Typing Effect */
.typing-text {
  display: inline-block;
  border-right: 3px solid var(--color-accent-primary);
  animation: blink 0.7s step-end infinite;
}

@keyframes blink {
  50% { border-color: transparent; }
}

/* Social Links */
.social-links {
  display: flex;
  justify-content: center;
  gap: 1.5rem;
  margin-bottom: 3rem;
  opacity: 0;
  animation: fadeInUp 0.8s ease 0.4s forwards;
}

.social-links a {
  color: var(--color-text-secondary);
  font-size: 1.8rem;
  transition: all 0.3s ease;
  padding: 1rem;
  border-radius: 1rem;
}

.social-links a:hover {
  color: var(--color-accent-primary);
  transform: translateY(-5px);
  background: var(--color-glass-bg);
}

.social-links.visible {
  opacity: 1;
  animation: none;
}

/* Buttons */
.btn-group {
  display: flex;
  justify-content: center;
  gap: 1rem;
  flex-wrap: wrap;
  opacity: 0;
  animation: fadeInUp 0.8s ease 0.6s forwards;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 1rem 2rem;
  border-radius: 1rem;
  font-weight: 600;
  font-size: 1rem;
  transition: all 0.3s ease;
  cursor: pointer;
  border: none;
  width: 250px;
}

.btn-primary {
  background: linear-gradient(135deg, var(--color-accent-primary), var(--color-accent-secondary));
  color: white;
  box-shadow: 0 4px 20px rgba(99, 102, 241, 0.4);
}

.btn-primary:hover {
  transform: translateY(-3px);
  box-shadow: 0 8px 30px rgba(99, 102, 241, 0.5);
  color: white;
}

.btn-outline {
  background: var(--color-bg-primary);
  border: 2px solid var(--color-accent-primary);
  color: var(--color-accent-primary);
}

.btn-outline:hover {
  background: var(--color-accent-primary);
  color: white;
  transform: translateY(-3px);
}

.btn-block {
  width: 100%;
  margin-bottom: 2rem;
}

/* --------------------------------------------------------------------------
   Glass Cards
   -------------------------------------------------------------------------- */
.glass-card {
  background: var(--color-glass-bg);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-radius: 1.5rem;
  border: 1px solid var(--color-glass-border);
  padding: 2rem;
  transition: all 0.3s ease;
  height: 100%;
  display: flex;
  flex-direction: column;
}

.glass-card:hover {
  transform: translateY(-8px);
  box-shadow: 0 20px 40px var(--color-shadow);
  border-color: var(--color-accent-primary);
}

.glass-card.featured {
  background: linear-gradient(145deg, var(--color-glass-bg), rgba(99, 102, 241, 0.1));
  border-color: rgba(99, 102, 241, 0.3);
}

.glass-card.featured h3 {
  color: var(--color-accent-primary);
}

/* --------------------------------------------------------------------------
   Grid Layouts
   -------------------------------------------------------------------------- */
.grid {
  display: grid;
  gap: 2rem;
}

.grid-2 {
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
}

.grid-3 {
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
}

.grid-4 {
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
}

/* Skills Grid Override (2x2) */
@media (min-width: 769px) {
  #skills .grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

/* --------------------------------------------------------------------------
   Tags
   -------------------------------------------------------------------------- */
.tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  padding-top: 1.5rem;
}

.tag {
  background: rgba(99, 102, 241, 0.1);
  color: var(--color-accent-primary);
  padding: 0.25rem 1rem;
  border-radius: 9999px;
  font-size: 0.85rem;
  font-weight: 500;
  transition: all 0.15s ease;
}

.tag:hover {
  background: var(--color-accent-primary);
  color: white;
}

/* --------------------------------------------------------------------------
   Meta Information
   -------------------------------------------------------------------------- */
.meta {
  display: flex;
  justify-content: space-between;
  align-items: center;
  color: var(--color-text-muted);
  font-size: 0.9rem;
  margin-bottom: 1rem;
}

.meta i {
  margin-right: 0.25rem;
}

/* --------------------------------------------------------------------------
   Certifications
   -------------------------------------------------------------------------- */
.cert-list {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}

.cert-item {
  border-left: 3px solid var(--color-accent-primary);
  padding-left: 1rem;
  transition: all 0.15s ease;
}

.cert-item:hover {
  border-left-width: 5px;
  padding-left: calc(1rem - 2px);
}

.cert-title {
  font-weight: 600;
  font-size: 1.05rem;
  color: var(--color-text-primary);
  margin-bottom: 0.25rem;
}

.cert-meta {
  font-size: 0.85rem;
  color: var(--color-text-muted);
}

.cred-id {
  font-family: "JetBrains Mono", "Fira Code", monospace;
  font-size: 0.75rem;
  color: var(--color-text-muted);
  background: var(--color-bg-secondary);
  padding: 2px 8px;
  border-radius: 0.5rem;
  display: inline-block;
  margin-top: 0.25rem;
}

.cert-link {
  display: inline-flex;
  align-items: center;
  gap: 0.25rem;
  font-size: 0.8rem;
  margin-top: 0.5rem;
  color: var(--color-accent-primary);
  font-weight: 500;
  transition: all 0.15s ease;
}

.cert-link:hover {
  gap: calc(0.25rem + 2px);
  color: var(--color-accent-secondary);
}

/* --------------------------------------------------------------------------
   Experience Timeline
   -------------------------------------------------------------------------- */
.experience-card {
  position: relative;
}

.experience-card::before {
  content: "";
  position: absolute;
  left: -30px;
  top: 0;
  bottom: 0;
  width: 3px;
  background: linear-gradient(135deg, var(--color-accent-primary), var(--color-accent-secondary));
  border-radius: 9999px;
}

.experience-card + .experience-card {
  margin-top: 2rem;
}

.experience-card ul {
  list-style: none;
  margin-top: 1rem;
}

.experience-card li {
  color: var(--color-text-secondary);
  padding-left: 1.5rem;
  position: relative;
  margin-bottom: 0.5rem;
}

.experience-card li::before {
  content: "→";
  position: absolute;
  left: 0;
  color: var(--color-accent-primary);
}

/* --------------------------------------------------------------------------
   Contact Section
   -------------------------------------------------------------------------- */
.contact-section {
  padding: 4rem 0;
}

.contact-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 3rem;
  background: var(--color-glass-bg);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border: 1px solid var(--color-glass-border);
  border-radius: 1.5rem;
  padding: 3rem;
  position: relative;
  overflow: hidden;
}

@media (min-width: 768px) {
  .contact-grid {
    grid-template-columns: 1fr 1fr;
  }
}

.contact-grid::before {
  content: "";
  position: absolute;
  top: -50%;
  left: -50%;
  width: 200%;
  height: 200%;
  background: radial-gradient(circle at center, rgba(99, 102, 241, 0.05) 0%, transparent 50%);
  pointer-events: none;
  z-index: 0;
}

.contact-services,
.contact-connect {
  position: relative;
  z-index: 1;
}

.service-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
  margin-top: 2rem;
}

.service-list li {
  display: flex;
  gap: 1rem;
  padding: 1rem;
  border-radius: 1rem;
  background: rgba(255, 255, 255, 0.02);
  border: 1px solid rgba(148, 163, 184, 0.1);
  transition: all 0.3s ease;
}

.service-list li:hover {
  background: rgba(99, 102, 241, 0.05);
  border-color: rgba(99, 102, 241, 0.2);
  transform: translateX(5px);
}

.service-icon {
  font-size: 1.5rem;
  color: var(--color-accent-primary);
  display: flex;
  align-items: center;
  justify-content: center;
  width: 48px;
  height: 48px;
  background: rgba(99, 102, 241, 0.1);
  border-radius: 0.75rem;
  flex-shrink: 0;
}

.service-content h3 {
  font-size: 1.1rem;
  margin-bottom: 0.25rem;
  color: var(--color-text-primary);
}

.service-content p {
  font-size: 0.95rem;
  margin: 0;
  line-height: 1.5;
}

.contact-connect {
  display: flex;
  flex-direction: column;
}

.contact-connect p {
  margin-bottom: 2rem;
}

.social-follow {
  padding-top: 1.5rem;
  border-top: 1px solid var(--color-border);
  margin-bottom: 2rem;
}

.social-follow span {
  display: block;
  font-weight: 600;
  margin-bottom: 1rem;
  color: var(--color-text-primary);
}

.social-links-grid {
  display: flex;
  gap: 0.5rem;
}

.social-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
  border-radius: 9999px;
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  color: var(--color-text-secondary);
  font-size: 1.2rem;
  transition: all 0.3s ease;
}

.social-btn:hover {
  transform: translateY(-3px);
  color: white;
}

.social-btn.linkedin:hover { background: #0a66c2; border-color: #0a66c2; }
.social-btn.devto:hover { background: #000000; border-color: #000000; }
.social-btn.medium:hover { background: #02b875; border-color: #02b875; }

.system-status {
  margin-top: auto;
  display: flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.5rem 1rem;
  background: rgba(34, 197, 94, 0.1);
  border: 1px solid rgba(34, 197, 94, 0.2);
  border-radius: 9999px;
  width: fit-content;
}

.status-indicator {
  width: 10px;
  height: 10px;
  background-color: #22c55e;
  border-radius: 50%;
  position: relative;
}

.status-indicator::after {
  content: "";
  position: absolute;
  top: -2px;
  left: -2px;
  right: -2px;
  bottom: -2px;
  background-color: rgba(34, 197, 94, 0.4);
  border-radius: 50%;
  animation: pulse-status 2s infinite;
}

@keyframes pulse-status {
  0% { transform: scale(1); opacity: 0.8; }
  70% { transform: scale(3); opacity: 0; }
  100% { transform: scale(1); opacity: 0; }
}

.system-status span {
  font-size: 0.85rem;
  font-weight: 500;
  color: #22c55e;
}

/* --------------------------------------------------------------------------
   Animations
   -------------------------------------------------------------------------- */
@keyframes fadeInUp {
  from { opacity: 0; transform: translateY(30px); }
  to { opacity: 1; transform: translateY(0); }
}

/* Scroll Reveal */
.reveal {
  opacity: 0;
  transform: translateY(40px);
  transition: all 0.8s cubic-bezier(0.4, 0, 0.2, 1);
}

.reveal.visible {
  opacity: 1;
  transform: translateY(0);
}

.reveal-delay-1 { transition-delay: 0.1s; }
.reveal-delay-2 { transition-delay: 0.2s; }
.reveal-delay-3 { transition-delay: 0.3s; }
.reveal-delay-4 { transition-delay: 0.4s; }

/* Reduced Motion */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
  .reveal {
    opacity: 1;
    transform: none;
  }
}

/* --------------------------------------------------------------------------
   Back to Top Button
   -------------------------------------------------------------------------- */
.back-to-top {
  position: fixed;
  bottom: 2rem;
  right: 2rem;
  background: var(--color-glass-bg);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border: 1px solid var(--color-glass-border);
  color: var(--color-accent-primary);
  width: 50px;
  height: 50px;
  border-radius: 9999px;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: all 0.3s ease;
  opacity: 0;
  visibility: hidden;
  transform: translateY(20px);
  z-index: 900;
  box-shadow: 0 4px 20px var(--color-shadow);
}

.back-to-top.visible {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.back-to-top:hover {
  background: var(--color-accent-primary);
  color: white;
  transform: translateY(-5px);
  box-shadow: 0 10px 30px rgba(99, 102, 241, 0.4);
}

.back-to-top:focus-visible {
  outline: 2px solid var(--color-accent-primary);
  outline-offset: 2px;
}

/* --------------------------------------------------------------------------
   Accessibility
   -------------------------------------------------------------------------- */
.skip-link {
  position: absolute;
  top: -100px;
  left: 0;
  background: var(--color-accent-primary);
  color: white;
  padding: 0.5rem 1rem;
  z-index: 2000;
  transition: top 0.15s ease;
  text-decoration: none;
  font-weight: 500;
  border-radius: 0 0 0.75rem 0;
}

.skip-link:focus {
  top: 0;
  outline: 2px solid white;
  outline-offset: -2px;
}

/* --------------------------------------------------------------------------
   Blog Filters
   -------------------------------------------------------------------------- */
.blog-header {
  text-align: center;
  margin-bottom: 0.2rem;
  padding-bottom: 0;
}

.blog-header h1 {
  margin-bottom: 1rem;
}

.blog-header p {
  margin-bottom: 0;
}

.blog-header h1 i {
  color: var(--color-accent-primary);
}

.blog-filters {
  margin-bottom: 0.5rem;
  padding: 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 1.5rem;
}

.blog-posts {
  padding-top: 5px;
}

.blog-filter-btn {
  padding: 0.5rem 1.5rem;
  border-radius: 9999px;
  font-size: 0.95rem;
  transition: all 0.3s ease;
  min-width: 80px;
}

.blog-filter-btn.active {
  background: linear-gradient(135deg, var(--color-accent-primary), var(--color-accent-secondary));
  color: white;
  border-color: transparent;
  box-shadow: 0 4px 15px rgba(99, 102, 241, 0.4);
}

.blog-post-card {
  transition: opacity 0.3s ease, transform 0.3s ease;
  padding: 0;
  overflow: hidden;
}

.blog-thumbnail {
  width: 100%;
  height: 180px;
  overflow: hidden;
  border-bottom: 1px solid var(--color-glass-border);
}

.blog-thumbnail img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.5s ease;
}

.blog-post-card:hover .blog-thumbnail img {
  transform: scale(1.05);
}

.blog-content-preview {
  padding: 2rem;
  display: flex;
  flex-direction: column;
  height: 100%;
}

/* Blog Carousel */
.blog-carousel {
  position: relative;
  margin: 2rem 0;
  border-radius: 1rem;
  overflow: hidden;
  border: 1px solid var(--color-border);
}

.carousel-container {
  display: flex;
  overflow-x: auto;
  scroll-snap-type: x mandatory;
  scroll-behavior: smooth;
  -webkit-overflow-scrolling: touch;
}

.carousel-container::-webkit-scrollbar { display: none; }

.carousel-slide {
  flex: 0 0 100%;
  scroll-snap-align: start;
}

.carousel-slide img {
  width: 100%;
  height: auto;
  display: block;
}

.carousel-controls {
  display: flex;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.5rem;
  background: var(--color-glass-bg);
}

.carousel-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--color-text-secondary);
  opacity: 0.5;
  cursor: pointer;
  transition: opacity 0.3s ease;
}

.carousel-dot.active {
  opacity: 1;
  background: var(--color-accent-primary);
}

/* --------------------------------------------------------------------------
   Blog Content (Article Body)
   -------------------------------------------------------------------------- */
.blog-content {
  margin-top: 2.5rem;
}

.blog-content h2 {
  margin-top: 3rem;
  margin-bottom: 1rem;
}

.blog-content p {
  margin-bottom: 1rem;
  line-height: 1.8;
}

.blog-content ul,
.blog-content ol {
  margin-bottom: 1rem;
  margin-left: 1rem;
}

.blog-content li {
  margin-bottom: 0.25rem;
  line-height: 1.7;
}

.blog-content pre {
  margin: 2rem 0;
  padding: 3rem;
  background: var(--color-bg-secondary);
  border-radius: 1rem;
  border: 1px solid var(--color-border);
  overflow-x: auto;
  font-size: 1rem;
  line-height: 1.85;
  color: var(--color-text-primary);
}

.blog-content code {
  font-family: "JetBrains Mono", "Fira Code", monospace;
  font-size: 0.9em;
}

.blog-content a {
  color: var(--color-accent-primary);
  text-decoration: none;
  font-weight: 500;
  transition: color 0.15s ease;
}

.blog-content a:hover {
  color: var(--color-accent-secondary);
  text-decoration: underline;
}

/* Blog images */
.blog-image,
.post-image {
  margin: 2rem auto;
  text-align: center;
  max-width: 60%;
}

.blog-image img,
.post-image img {
  max-width: 100%;
  height: auto;
  border-radius: 1rem;
  border: 1px solid var(--color-border);
  display: block;
}

.blog-image .caption,
.post-image .caption {
  display: block;
  margin-top: 0.5rem;
  font-size: 0.9rem;
  color: var(--color-text-secondary);
  font-style: italic;
}

.blog-footer-cta {
  margin-top: 3rem;
  padding-top: 2rem;
  border-top: 1px solid var(--color-border);
}

.blog-footer-cta p {
  color: var(--color-text-secondary);
}

.blog-footer-cta a {
  color: var(--color-accent-primary);
  font-weight: 600;
  text-decoration: none;
}

/* Collapsible code blocks */
.collapsible-code {
  margin: 1.5rem 0;
  border: 1px solid var(--color-border);
  border-radius: 1rem;
  overflow: hidden;
}

.collapsible-code summary {
  padding: 1.25rem 1.5rem;
  cursor: pointer;
  font-weight: 600;
  color: var(--color-text-primary);
  background: var(--color-bg-secondary);
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  list-style: none;
  display: flex;
  align-items: center;
  gap: 0.75rem;
  border-left: 4px solid var(--color-accent-primary);
  user-select: none;
  position: relative;
}

.collapsible-code summary::-webkit-details-marker { display: none; }

.expand-hint {
  margin-left: auto;
  font-size: 0.65rem;
  letter-spacing: 0.1em;
  color: var(--color-accent-primary);
  opacity: 0;
  transform: translateX(10px);
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  font-weight: 700;
  white-space: nowrap;
  flex-shrink: 0;
  pointer-events: none;
}

.expand-hint::before {
  content: attr(data-expand);
}

.collapsible-code[open] .expand-hint::before {
  content: attr(data-collapse);
}

.collapsible-code summary:hover .expand-hint {
  opacity: 0.7;
  transform: translateX(0);
}

.collapsible-code summary::after {
  content: "\f078"; /* FontAwesome Chevron-Down */
  font-family: "Font Awesome 6 Free";
  font-weight: 900;
  font-size: 0.9rem;
  margin-left: 0.5rem;
  transition: transform 0.4s cubic-bezier(0.4, 0, 0.2, 1);
  color: var(--color-accent-primary);
}

.collapsible-code:not([open]) summary::after {
  transform: rotate(-90deg);
}

.collapsible-code summary:hover {
  background: rgba(99, 102, 241, 0.12);
  box-shadow: inset 0 0 10px rgba(99, 102, 241, 0.05);
}

.collapsible-code summary:hover .copy-code-btn {
  border-color: var(--color-accent-primary);
}

/* Mobile Fix for Collapsible Summary */
@media (max-width: 600px) {
  .collapsible-code summary {
    display: grid;
    grid-template-columns: 1fr auto auto;
    grid-template-rows: auto auto;
    gap: 0.5rem 0.75rem;
    padding: 1rem;
    align-items: center;
  }

  .collapsible-code summary > span:first-child {
    grid-column: 1;
    grid-row: 1;
    line-height: 1.4;
  }

  .expand-hint {
    grid-column: 1 / span 3;
    grid-row: 2;
    margin-left: 0;
    opacity: 0.6; /* More visible by default on mobile */
    transform: none;
    font-size: 0.6rem;
  }

  .collapsible-code summary:hover .expand-hint {
    transform: none;
  }

  .copy-code-btn {
    grid-column: 2;
    grid-row: 1;
  }

  .collapsible-code summary::after {
    grid-column: 3;
    grid-row: 1;
    margin-left: 0;
  }
}

.collapsible-code pre {
  padding: 3rem;
  line-height: 1.85;
  font-size: 1rem;
  margin: 0;
  border-radius: 0;
  border: none;
  border-top: 1px solid var(--color-border);
}

.copy-code-btn {
  background: var(--color-bg-primary);
  border: 1px solid var(--color-border);
  color: var(--color-text-secondary);
  width: 32px;
  height: 32px;
  border-radius: 0.5rem;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: all 0.2s ease;
  position: relative;
  z-index: 2;
  flex-shrink: 0;
}

.copy-code-btn:hover {
  background: var(--color-accent-primary);
  color: white;
  border-color: var(--color-accent-primary);
  transform: scale(1.1);
}

.copy-code-btn.copied {
  background: #22c55e;
  border-color: #22c55e;
  color: white;
}

/* --------------------------------------------------------------------------
   Focus-Visible Accessibility
   -------------------------------------------------------------------------- */
.glass-card:focus-visible,
.btn:focus-visible,
.social-links a:focus-visible,
.social-btn:focus-visible,
.tag:focus-visible,
.blog-filter-btn:focus-visible,
.blog-post-card:focus-visible,
.nav-links a:focus-visible,
.control-link:focus-visible {
  outline: 2px solid var(--color-accent-primary);
  outline-offset: 2px;
}

/* --------------------------------------------------------------------------
   Utility Classes
   -------------------------------------------------------------------------- */
.section-header-flex {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 1.5rem;
  margin-bottom: 1.5rem;
}

.section-header-flex h2 { margin-bottom: 0; }

.blog-filters-home {
  margin-bottom: 2rem;
  display: flex;
  justify-content: center;
  gap: 0.5rem;
  flex-wrap: wrap;
}

.github-invitation .glass-card { align-items: center; text-align: center; }
.github-invitation h2 { margin-bottom: 1rem; text-align: center; width: 100%; }
.github-invitation-text { max-width: 700px; margin: 0 auto 2rem; }
.github-invitation-buttons { justify-content: center; opacity: 1; animation: none; }
.github-invitation-buttons .btn { width: auto; min-width: 200px; }

.page-main-padded { padding-top: 80px; }
.text-center { text-align: center; }
.mt-xl { margin-top: 2rem; }
.mt-3xl { margin-top: 4rem; }
.mb-sm { margin-bottom: 0.5rem; }
.mb-md { margin-bottom: 1rem; }
.mb-lg { margin-bottom: 1.5rem; }
.mb-xl { margin-bottom: 2rem; }
.mb-2xl { margin-bottom: 3rem; }
.pb-lg { padding-bottom: 1.5rem; }
.p-2xl { padding: 3rem; }

.flex-col-center { display: flex; flex-direction: column; align-items: center; }
.filter-group { display: flex; gap: 0.5rem; flex-wrap: wrap; justify-content: center; }

.post-header {
  border-bottom: 1px solid var(--color-border);
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  flex-wrap: wrap;
  gap: 1rem;
}

/* --------------------------------------------------------------------------
   Responsive Design
   -------------------------------------------------------------------------- */
@media (max-width: 1024px) {
  .container { padding: 0 1.5rem; }
}

@media (max-width: 768px) {
  .nav-links {
    position: fixed;
    top: 70px;
    left: 0;
    right: 0;
    background: var(--color-glass-bg);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    flex-direction: column;
    padding: 2rem;
    gap: 1rem;
    border-bottom: 1px solid var(--color-glass-border);
    transform: translateY(-100%);
    opacity: 0;
    visibility: hidden;
    transition: all 0.3s ease;
  }

  .nav-links.active {
    transform: translateY(0);
    opacity: 1;
    visibility: visible;
  }

  .nav-links .nav-cta {
    width: 100%;
    margin-top: 0.5rem;
    text-align: center;
  }

  .menu-toggle { display: flex; }

  .menu-toggle.active span:nth-child(1) { transform: rotate(45deg) translate(5px, 5px); }
  .menu-toggle.active span:nth-child(2) { opacity: 0; }
  .menu-toggle.active span:nth-child(3) { transform: rotate(-45deg) translate(5px, -5px); }

  .hero { padding-top: 100px; }
  .btn-group { flex-direction: column; align-items: center; }
  .meta { flex-direction: column; align-items: flex-start; gap: 0.25rem; }
  section { padding: 3rem 0; }
  .experience-card::before { left: -20px; }
  .blog-image, .post-image { max-width: 90%; }
}

@media (max-width: 480px) {
  .container { padding: 0 1rem; }
  .social-links { gap: 1rem; }
  .social-links a { font-size: 1.5rem; padding: 0.5rem; }
  .glass-card { padding: 1.5rem; }
  .nav-controls { gap: 0.5rem; }
}