/* ==========================================================================
   Aleksandr Čerkasov — cerkasov.info Design System & Styles
   Modern Dark Theme, Glassmorphism, Neon Accents & Responsive Layout
   ========================================================================== */

/* --- CSS Variables & Design Tokens --- */
:root {
  /* Color Palette */
  --bg-main: #090c13;
  --bg-secondary: #0f1523;
  --bg-tertiary: #151d30;

  --card-bg: rgba(18, 26, 43, 0.72);
  --card-bg-hover: rgba(24, 34, 56, 0.85);
  --card-border: rgba(255, 255, 255, 0.08);
  --card-border-hover: rgba(0, 229, 255, 0.35);

  --text-primary: #f8fafc;
  --text-secondary: #94a3b8;
  --text-muted: #64748b;

  /* Brand & Tech Accents */
  --accent-cyan: #00e5ff;
  --accent-cyan-glow: rgba(0, 229, 255, 0.25);
  --accent-indigo: #6366f1;
  --accent-violet: #a855f7;
  --accent-emerald: #10b981;
  --accent-amber: #f59e0b;
  --accent-pink: #ec4899;

  /* Tech Badge Colors */
  --color-php: #777bb4;
  --color-aws: #ff9900;
  --color-k8s: #326ce5;
  --color-js: #f7df1e;
  --color-sql: #00758f;
  --color-shell: #4ebb2d;
  --color-docker: #2496ed;
  --color-react: #61dafb;
  --color-seo: #10b981;
  --color-symfony: #ffffff;
  --color-sylius: #1abb9c;

  /* Typography */
  --font-sans: 'Plus Jakarta Sans', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --font-mono: 'JetBrains Mono', monospace;

  /* Shadows & Glows */
  --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.3);
  --shadow-md: 0 8px 24px rgba(0, 0, 0, 0.4);
  --shadow-lg: 0 16px 40px rgba(0, 0, 0, 0.5);
  --glow-cyan: 0 0 30px rgba(0, 229, 255, 0.2);
  --glow-k8s: 0 0 30px rgba(50, 108, 229, 0.25);

  /* Transitions */
  --transition-fast: 0.15s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-normal: 0.25s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-smooth: 0.4s cubic-bezier(0.16, 1, 0.3, 1);
}

/* --- Global Reset & Base Setup --- */
*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
  scroll-padding-top: 80px;
  background-color: var(--bg-main);
  color: var(--text-primary);
  font-family: var(--font-sans);
  line-height: 1.6;
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  position: relative;
  min-height: 100vh;
  overflow-x: hidden;
  background: radial-gradient(circle at 50% 0%, #151c2e 0%, var(--bg-main) 60%);
}

/* Background Canvas */
#bg-canvas {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: 0;
  pointer-events: none;
  opacity: 0.65;
}

/* Standard Container */
.container {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 1.5rem;
  position: relative;
  z-index: 1;
}

/* Typography Utilities */
h1,
h2,
h3,
h4,
h5,
h6 {
  color: var(--text-primary);
  font-weight: 700;
  line-height: 1.25;
}

p {
  color: var(--text-secondary);
}

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

/* Gradient Text Effect */
.gradient-text {
  background: linear-gradient(135deg, #ffffff 0%, #00e5ff 60%, #a855f7 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  display: inline-block;
}

.highlight {
  color: var(--accent-cyan);
}

/* Glassmorphism Surface */
.glassmorphism {
  background: var(--card-bg);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border: 1px solid var(--card-border);
  border-radius: 16px;
  box-shadow: var(--shadow-md);
  transition: transform var(--transition-normal), border-color var(--transition-normal), box-shadow var(--transition-normal);
}

.glassmorphism:hover {
  border-color: var(--card-border-hover);
  box-shadow: var(--shadow-lg), var(--glow-cyan);
}

.shadow-glow {
  box-shadow: 0 10px 40px -10px rgba(0, 0, 0, 0.7), 0 0 25px rgba(0, 229, 255, 0.12);
}

/* --- Buttons & Interactive Elements --- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  font-family: var(--font-sans);
  font-size: 0.95rem;
  font-weight: 600;
  padding: 0.75rem 1.4rem;
  border-radius: 10px;
  cursor: pointer;
  border: 1px solid transparent;
  transition: all var(--transition-normal);
  text-decoration: none;
}

.btn-primary {
  background: linear-gradient(135deg, #00c6ff 0%, #0072ff 100%);
  color: #ffffff;
  box-shadow: 0 4px 18px rgba(0, 114, 255, 0.35);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 24px rgba(0, 229, 255, 0.5);
}

.btn-primary .btn-arrow {
  transition: transform var(--transition-fast);
}

.btn-primary:hover .btn-arrow {
  transform: translateX(3px);
}

.btn-glass {
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid rgba(255, 255, 255, 0.12);
  color: var(--text-primary);
  backdrop-filter: blur(10px);
}

.btn-glass:hover {
  background: rgba(255, 255, 255, 0.1);
  border-color: var(--accent-cyan);
  color: var(--accent-cyan);
  transform: translateY(-2px);
}

.btn-outline {
  background: transparent;
  border: 1px solid rgba(0, 229, 255, 0.4);
  color: var(--accent-cyan);
}

.btn-outline:hover {
  background: rgba(0, 229, 255, 0.12);
  border-color: var(--accent-cyan);
  transform: translateY(-1px);
}

.btn-sm {
  font-size: 0.85rem;
  padding: 0.45rem 0.9rem;
  border-radius: 8px;
}

.btn-icon-only {
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid rgba(255, 255, 255, 0.12);
  color: var(--text-secondary);
  padding: 0.75rem;
  border-radius: 10px;
  cursor: pointer;
  transition: all var(--transition-fast);
}

.btn-icon-only:hover {
  color: var(--accent-cyan);
  border-color: var(--accent-cyan);
  background: rgba(0, 229, 255, 0.08);
  transform: translateY(-2px);
}

/* --- Header & Navigation --- */
.site-header {
  position: sticky;
  top: 0;
  width: 100%;
  z-index: 100;
  background: rgba(9, 12, 19, 0.82);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid rgba(255, 255, 255, 0.06);
  transition: background-color var(--transition-normal);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 72px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  font-weight: 700;
  font-size: 1.15rem;
}

.brand-badge {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  background: linear-gradient(135deg, rgba(0, 229, 255, 0.2), rgba(99, 102, 241, 0.2));
  border: 1px solid rgba(0, 229, 255, 0.5);
  border-radius: 8px;
  font-size: 0.9rem;
  font-weight: 800;
  color: var(--accent-cyan);
}

.brand-domain {
  letter-spacing: -0.02em;
}

.desktop-nav .nav-links {
  display: flex;
  list-style: none;
  gap: 2rem;
}

.nav-link {
  font-size: 0.95rem;
  font-weight: 500;
  color: var(--text-secondary);
  position: relative;
  padding: 0.25rem 0;
}

.nav-link::after {
  content: '';
  position: absolute;
  bottom: -2px;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--accent-cyan);
  transition: width var(--transition-fast);
}

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

.nav-link:hover::after {
  width: 100%;
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 1rem;
}

.status-pill {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.35rem 0.75rem;
  background: rgba(16, 185, 129, 0.1);
  border: 1px solid rgba(16, 185, 129, 0.3);
  border-radius: 999px;
  font-size: 0.75rem;
  font-weight: 600;
  color: #34d399;
}

.status-dot {
  width: 7px;
  height: 7px;
  background: #10b981;
  border-radius: 50%;
  box-shadow: 0 0 8px #10b981;
  animation: pulse-dot 2s infinite;
}

@keyframes pulse-dot {
  0% {
    transform: scale(0.95);
    opacity: 0.8;
    box-shadow: 0 0 0 0 rgba(16, 185, 129, 0.7);
  }

  70% {
    transform: scale(1.1);
    opacity: 1;
    box-shadow: 0 0 0 6px rgba(16, 185, 129, 0);
  }

  100% {
    transform: scale(0.95);
    opacity: 0.8;
    box-shadow: 0 0 0 0 rgba(16, 185, 129, 0);
  }
}

.mobile-toggle {
  display: none;
  background: transparent;
  border: none;
  cursor: pointer;
  padding: 0.5rem;
  flex-direction: column;
  gap: 5px;
}

.mobile-toggle span {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--text-primary);
  border-radius: 2px;
  transition: all var(--transition-normal);
}

.mobile-menu {
  display: none;
  background: rgba(15, 21, 35, 0.98);
  border-bottom: 1px solid var(--card-border);
  padding: 1rem 1.5rem 1.5rem;
}

.mobile-menu.open {
  display: block;
}

.mobile-nav-links {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.mobile-link {
  font-size: 1.1rem;
  font-weight: 600;
  color: var(--text-secondary);
}

.mobile-link:hover {
  color: var(--accent-cyan);
}

/* --- Hero Section --- */
.hero-section {
  padding: 5rem 0 4rem;
  position: relative;
}

.hero-grid {
  display: grid;
  grid-template-columns: 1.15fr 0.95fr;
  gap: 3.5rem;
  align-items: center;
}

.hero-header-row {
  display: flex;
  align-items: center;
  gap: 1.25rem;
  margin-bottom: 1.5rem;
  flex-wrap: wrap;
}

.hero-header-row .hero-badge {
  margin-bottom: 0;
}

.hero-avatar-wrapper {
  position: relative;
  width: 108px;
  height: 108px;
  border-radius: 24px;
  padding: 3px;
  background: linear-gradient(135deg, rgba(0, 229, 255, 0.8), rgba(99, 102, 241, 0.6), rgba(168, 85, 247, 0.8));
  box-shadow: 0 0 25px rgba(0, 229, 255, 0.25), 0 10px 20px rgba(0, 0, 0, 0.4);
  transition: transform var(--transition-normal), box-shadow var(--transition-normal);
  flex-shrink: 0;
  cursor: pointer;
}

.hero-avatar-wrapper:hover {
  transform: translateY(-3px) scale(1.04);
  box-shadow: 0 0 35px rgba(0, 229, 255, 0.45), 0 14px 28px rgba(0, 0, 0, 0.5);
}

.hero-avatar-img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center 20%;
  border-radius: 21px;
  display: block;
}

.avatar-status-dot {
  position: absolute;
  bottom: -2px;
  right: -2px;
  width: 16px;
  height: 16px;
  background-color: #10b981;
  border: 3px solid var(--bg-main);
  border-radius: 50%;
  box-shadow: 0 0 10px #10b981;
  animation: pulse-dot 2s infinite;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.4rem 0.9rem;
  background: rgba(0, 229, 255, 0.08);
  border: 1px solid rgba(0, 229, 255, 0.25);
  border-radius: 999px;
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--accent-cyan);
  margin-bottom: 1.5rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

/* Lightbox Photo Modal */
.photo-modal-backdrop {
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  background: rgba(9, 12, 19, 0.88);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  z-index: 2000;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 1.5rem;
  opacity: 0;
  pointer-events: none;
  transition: opacity var(--transition-normal);
}

.photo-modal-backdrop.open {
  opacity: 1;
  pointer-events: auto;
}

.photo-modal-content {
  position: relative;
  max-width: 480px;
  width: 100%;
  background: var(--card-bg);
  border: 1px solid var(--card-border-hover);
  border-radius: 24px;
  padding: 1.25rem;
  box-shadow: 0 20px 50px rgba(0, 0, 0, 0.8), 0 0 40px rgba(0, 229, 255, 0.3);
  transform: scale(0.92);
  transition: transform var(--transition-normal);
}

.photo-modal-backdrop.open .photo-modal-content {
  transform: scale(1);
}

.photo-modal-img {
  width: 100%;
  height: auto;
  max-height: 70vh;
  object-fit: cover;
  border-radius: 16px;
  display: block;
  box-shadow: var(--shadow-md);
}

.photo-modal-caption {
  margin-top: 1rem;
  text-center: center;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.25rem;
}

.photo-modal-title {
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--text-primary);
}

.photo-modal-sub {
  font-size: 0.88rem;
  color: var(--accent-cyan);
}

.photo-modal-close {
  position: absolute;
  top: 1rem;
  right: 1rem;
  background: rgba(0, 0, 0, 0.6);
  border: 1px solid rgba(255, 255, 255, 0.2);
  color: #fff;
  width: 36px;
  height: 36px;
  border-radius: 50%;
  font-size: 1.25rem;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: all var(--transition-fast);
  z-index: 10;
}

.photo-modal-close:hover {
  background: var(--accent-cyan);
  color: #000;
}

.hero-title {
  font-size: 3.25rem;
  font-weight: 800;
  line-height: 1.15;
  letter-spacing: -0.03em;
  margin-bottom: 1.25rem;
}

.hero-description {
  font-size: 1.15rem;
  line-height: 1.7;
  color: var(--text-secondary);
  margin-bottom: 1.75rem;
}

.hero-description strong {
  color: var(--text-primary);
  font-weight: 600;
}

.hero-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.6rem;
  margin-bottom: 2.25rem;
}

.tag {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.35rem 0.75rem;
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: 8px;
  font-size: 0.85rem;
  font-weight: 500;
  color: var(--text-secondary);
  transition: all var(--transition-fast);
}

.tag:hover {
  background: rgba(255, 255, 255, 0.08);
  border-color: rgba(255, 255, 255, 0.18);
  color: var(--text-primary);
  transform: translateY(-1px);
}

.tech-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  display: inline-block;
}

.php-dot {
  background-color: var(--color-php);
  box-shadow: 0 0 6px var(--color-php);
}

.aws-dot {
  background-color: var(--color-aws);
  box-shadow: 0 0 6px var(--color-aws);
}

.k8s-dot {
  background-color: var(--color-k8s);
  box-shadow: 0 0 6px var(--color-k8s);
}

.js-dot {
  background-color: var(--color-js);
  box-shadow: 0 0 6px var(--color-js);
}

.sql-dot {
  background-color: var(--color-sql);
  box-shadow: 0 0 6px var(--color-sql);
}

.shell-dot {
  background-color: var(--color-shell);
  box-shadow: 0 0 6px var(--color-shell);
}

.react-dot {
  background-color: var(--color-react);
  box-shadow: 0 0 6px var(--color-react);
}

.seo-dot {
  background-color: var(--color-seo);
  box-shadow: 0 0 6px var(--color-seo);
}

.symfony-dot {
  background-color: #ffffff;
  box-shadow: 0 0 6px rgba(255, 255, 255, 0.8);
}

.sylius-dot {
  background-color: #1abb9c;
  box-shadow: 0 0 6px #1abb9c;
}

.hero-cta-group {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 1rem;
  margin-bottom: 3rem;
}

.hero-metrics {
  display: flex;
  align-items: center;
  gap: 1.75rem;
  padding: 1.25rem 1.5rem;
  background: rgba(255, 255, 255, 0.02);
  border: 1px solid rgba(255, 255, 255, 0.06);
  border-radius: 12px;
}

.metric-card {
  display: flex;
  flex-direction: column;
}

.metric-num {
  font-size: 1.35rem;
  font-weight: 800;
  color: var(--accent-cyan);
  font-family: var(--font-mono);
}

.metric-label {
  font-size: 0.75rem;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  font-weight: 600;
}

.metric-divider {
  width: 1px;
  height: 36px;
  background: rgba(255, 255, 255, 0.08);
}

/* --- Terminal UI Component --- */
.terminal-window {
  background: #0d121d;
  border: 1px solid rgba(0, 229, 255, 0.2);
  border-radius: 14px;
  overflow: hidden;
  font-family: var(--font-mono);
  box-shadow: var(--shadow-lg), 0 0 35px rgba(0, 229, 255, 0.08);
}

.terminal-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.65rem 1rem;
  background: #131a29;
  border-bottom: 1px solid rgba(255, 255, 255, 0.06);
}

.window-buttons {
  display: flex;
  gap: 6px;
}

.btn-dot {
  width: 11px;
  height: 11px;
  border-radius: 50%;
  display: inline-block;
}

.btn-dot.close {
  background: #ff5f56;
}

.btn-dot.minimize {
  background: #ffbd2e;
}

.btn-dot.expand {
  background: #27c93f;
}

.terminal-title {
  font-size: 0.75rem;
  color: var(--text-muted);
  letter-spacing: 0.02em;
}

.terminal-badge {
  font-size: 0.7rem;
  padding: 0.15rem 0.45rem;
  background: rgba(255, 255, 255, 0.08);
  border-radius: 4px;
  color: var(--text-secondary);
}

.terminal-body {
  padding: 1.25rem;
  font-size: 0.88rem;
  line-height: 1.65;
  color: #e2e8f0;
  max-height: 380px;
  overflow-y: auto;
}

.term-line {
  margin-bottom: 0.5rem;
}

.term-dim {
  color: #64748b;
  font-size: 0.8rem;
}

.term-prompt {
  color: #00e5ff;
  font-weight: 600;
}

.term-path {
  color: #a855f7;
}

.term-cmd {
  color: #ffffff;
  font-weight: 500;
}

.output-text strong {
  color: #38bdf8;
}

.output-json pre {
  margin: 0.25rem 0;
  padding: 0.5rem 0.75rem;
  background: rgba(0, 0, 0, 0.3);
  border-radius: 8px;
  font-size: 0.82rem;
  white-space: pre-wrap;
}

.json-key {
  color: #38bdf8;
}

.json-str {
  color: #4ade80;
}

.json-bool {
  color: #f59e0b;
}

.prompt-line {
  display: flex;
  align-items: center;
}

.term-cursor {
  color: var(--accent-cyan);
  animation: blink 1s step-end infinite;
  margin-left: 2px;
}

@keyframes blink {

  0%,
  100% {
    opacity: 1;
  }

  50% {
    opacity: 0;
  }
}

.terminal-footer {
  padding: 0.5rem 1rem;
  background: #0f1523;
  border-top: 1px solid rgba(255, 255, 255, 0.04);
  font-size: 0.75rem;
  color: var(--text-muted);
}

/* --- Section Layout --- */
.section {
  padding: 6rem 0;
  position: relative;
}

.section-header {
  margin-bottom: 3.5rem;
}

.text-center {
  text-align: center;
}

.section-subtitle {
  display: inline-block;
  font-size: 0.82rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--accent-cyan);
  margin-bottom: 0.6rem;
}

.section-title {
  font-size: 2.35rem;
  letter-spacing: -0.02em;
  margin-bottom: 0.75rem;
}

.section-desc {
  font-size: 1.05rem;
  max-width: 620px;
  margin: 0 auto;
}

/* --- Services Section --- */
.services-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(340px, 1fr));
  gap: 1.5rem;
  margin-bottom: 2rem;
}

.service-card {
  padding: 2.25rem 2rem;
  display: flex;
  flex-direction: column;
  position: relative;
  overflow: hidden;
  border: 1px solid rgba(255, 255, 255, 0.08);
}

.service-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--accent-cyan), var(--accent-indigo));
  opacity: 0;
  transition: opacity var(--transition-normal);
}

.service-card:hover::before {
  opacity: 1;
}

.service-icon-box {
  width: 58px;
  height: 58px;
  border-radius: 14px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 1.5rem;
  background: rgba(0, 229, 255, 0.1);
  color: var(--accent-cyan);
  border: 1px solid rgba(0, 229, 255, 0.25);
  transition: transform var(--transition-normal);
}

.service-card:hover .service-icon-box {
  transform: translateY(-3px) scale(1.05);
}

.service-badge {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--accent-cyan);
  margin-bottom: 0.5rem;
  display: inline-block;
}

.service-title {
  font-size: 1.35rem;
  margin-bottom: 0.85rem;
  line-height: 1.3;
}

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

.service-features {
  list-style: none;
  margin-top: auto;
  border-top: 1px solid rgba(255, 255, 255, 0.06);
  padding-top: 1.15rem;
  display: flex;
  flex-direction: column;
  gap: 0.55rem;
}

.service-features li {
  font-size: 0.84rem;
  color: var(--text-muted);
  position: relative;
  padding-left: 1.25rem;
  display: flex;
  align-items: center;
}

.service-features li::before {
  content: '✓';
  position: absolute;
  left: 0;
  color: var(--accent-cyan);
  font-weight: 800;
  font-size: 0.75rem;
}

/* --- Skills Matrix --- */
.filter-controls {
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-bottom: 2.5rem;
}

.filter-btn {
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid rgba(255, 255, 255, 0.08);
  color: var(--text-secondary);
  font-family: var(--font-sans);
  font-size: 0.9rem;
  font-weight: 600;
  padding: 0.55rem 1.1rem;
  border-radius: 999px;
  cursor: pointer;
  transition: all var(--transition-fast);
}

.filter-btn:hover {
  background: rgba(255, 255, 255, 0.09);
  color: var(--text-primary);
}

.filter-btn.active {
  background: rgba(0, 229, 255, 0.15);
  border-color: var(--accent-cyan);
  color: var(--accent-cyan);
  box-shadow: 0 0 16px rgba(0, 229, 255, 0.2);
}

.skills-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(270px, 1fr));
  gap: 1.5rem;
}

.skill-card {
  padding: 1.75rem;
  display: flex;
  flex-direction: column;
}

.skill-header {
  display: flex;
  align-items: center;
  gap: 1rem;
  margin-bottom: 1.15rem;
}

.skill-icon {
  width: 52px;
  height: 52px;
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  transition: transform var(--transition-normal);
}

.skill-card:hover .skill-icon {
  transform: scale(1.08) rotate(3deg);
}

.php-bg {
  background: rgba(119, 123, 180, 0.15);
  color: #8892bf;
  border: 1px solid rgba(119, 123, 180, 0.3);
}

.aws-bg {
  background: rgba(255, 153, 0, 0.15);
  color: #ff9900;
  border: 1px solid rgba(255, 153, 0, 0.3);
}

.k8s-bg {
  background: rgba(50, 108, 229, 0.15);
  color: #326ce5;
  border: 1px solid rgba(50, 108, 229, 0.3);
}

.shell-bg {
  background: rgba(78, 187, 45, 0.15);
  color: #4ebb2d;
  border: 1px solid rgba(78, 187, 45, 0.3);
}

.sql-bg {
  background: rgba(0, 117, 143, 0.15);
  color: #38bdf8;
  border: 1px solid rgba(0, 117, 143, 0.3);
}

.js-bg {
  background: rgba(247, 223, 30, 0.15);
  color: #f7df1e;
  border: 1px solid rgba(247, 223, 30, 0.3);
}

.web-bg {
  background: rgba(236, 72, 153, 0.15);
  color: #f472b6;
  border: 1px solid rgba(236, 72, 153, 0.3);
}

.docker-bg {
  background: rgba(36, 150, 237, 0.15);
  color: #38bdf8;
  border: 1px solid rgba(36, 150, 237, 0.3);
}

.react-bg {
  background: rgba(97, 218, 251, 0.15);
  color: #61dafb;
  border: 1px solid rgba(97, 218, 251, 0.3);
}

.seo-bg {
  background: rgba(16, 185, 129, 0.15);
  color: #34d399;
  border: 1px solid rgba(16, 185, 129, 0.3);
}

.symfony-bg {
  background: rgba(255, 255, 255, 0.1);
  color: #ffffff;
  border: 1px solid rgba(255, 255, 255, 0.25);
}

.sylius-bg {
  background: rgba(26, 187, 156, 0.15);
  color: #1abb9c;
  border: 1px solid rgba(26, 187, 156, 0.35);
}

.skill-pill {
  display: inline-block;
  font-size: 0.68rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  padding: 0.15rem 0.5rem;
  border-radius: 4px;
  margin-bottom: 0.3rem;
}

.core-pill {
  background: rgba(119, 123, 180, 0.2);
  color: #a5b4fc;
}

.cloud-pill {
  background: rgba(255, 153, 0, 0.2);
  color: #fdba74;
}

.k8s-pill {
  background: rgba(50, 108, 229, 0.2);
  color: #93c5fd;
}

.shell-pill {
  background: rgba(78, 187, 45, 0.2);
  color: #86efac;
}

.sql-pill {
  background: rgba(56, 189, 248, 0.2);
  color: #7dd3fc;
}

.js-pill {
  background: rgba(247, 223, 30, 0.2);
  color: #fef08a;
}

.web-pill {
  background: rgba(236, 72, 153, 0.2);
  color: #fbcfe8;
}

.react-pill {
  background: rgba(97, 218, 251, 0.2);
  color: #a5f3fc;
}

.seo-pill {
  background: rgba(16, 185, 129, 0.2);
  color: #6ee7b7;
}

.symfony-pill {
  background: rgba(255, 255, 255, 0.15);
  color: #ffffff;
}

.sylius-pill {
  background: rgba(26, 187, 156, 0.2);
  color: #5eead4;
}

.skill-title {
  font-size: 1.1rem;
  font-weight: 700;
}

.skill-description {
  font-size: 0.9rem;
  line-height: 1.55;
  margin-bottom: 1.25rem;
  color: var(--text-secondary);
}

.skill-bullets {
  list-style: none;
  margin-top: auto;
  border-top: 1px solid rgba(255, 255, 255, 0.06);
  padding-top: 1rem;
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
}

.skill-bullets li {
  font-size: 0.8rem;
  color: var(--text-muted);
  position: relative;
  padding-left: 1.1rem;
}

.skill-bullets li::before {
  content: '▹';
  position: absolute;
  left: 0;
  color: var(--accent-cyan);
}

/* Hide card when filtered out */
.skill-card.is-hidden {
  display: none;
}

/* --- Architecture Pipeline Flow --- */
.pipeline-flow {
  display: flex;
  align-items: stretch;
  justify-content: space-between;
  gap: 1rem;
  position: relative;
}

.pipeline-step {
  flex: 1;
  display: flex;
  flex-direction: column;
}

.step-badge {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  font-weight: 800;
  color: var(--accent-cyan);
  padding: 0.2rem 0.6rem;
  background: rgba(0, 229, 255, 0.1);
  border: 1px solid rgba(0, 229, 255, 0.3);
  border-radius: 6px;
  align-self: flex-start;
  margin-bottom: 0.75rem;
}

.step-card {
  padding: 1.75rem 1.4rem;
  height: 100%;
  display: flex;
  flex-direction: column;
}

.step-icon {
  width: 46px;
  height: 46px;
  border-radius: 10px;
  background: rgba(0, 229, 255, 0.1);
  color: var(--accent-cyan);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 1rem;
}

.step-title {
  font-size: 1.15rem;
  margin-bottom: 0.6rem;
}

.step-text {
  font-size: 0.88rem;
  line-height: 1.5;
  color: var(--text-secondary);
  margin-bottom: 1.25rem;
}

.step-tech {
  margin-top: auto;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--accent-cyan);
  font-weight: 600;
}

.pipeline-connector {
  display: flex;
  align-items: center;
  justify-content: center;
  color: rgba(255, 255, 255, 0.2);
  flex-shrink: 0;
  padding-top: 2rem;
}

/* --- Interactive Live Terminal Box --- */
.quick-commands {
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-bottom: 1.5rem;
}

.cmd-pill {
  font-family: var(--font-mono);
  font-size: 0.82rem;
  padding: 0.4rem 0.85rem;
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid rgba(255, 255, 255, 0.1);
  color: var(--text-secondary);
  border-radius: 6px;
  cursor: pointer;
  transition: all var(--transition-fast);
}

.cmd-pill:hover {
  background: rgba(0, 229, 255, 0.12);
  border-color: var(--accent-cyan);
  color: var(--accent-cyan);
}

.interactive-terminal-box {
  max-width: 900px;
  margin: 0 auto;
  background: #0d121d;
  border: 1px solid rgba(0, 229, 255, 0.25);
  border-radius: 14px;
  overflow: hidden;
  font-family: var(--font-mono);
}

.term-status-badge {
  font-size: 0.7rem;
  color: #10b981;
  display: flex;
  align-items: center;
  gap: 4px;
}

.term-status-badge::before {
  content: '';
  width: 6px;
  height: 6px;
  background: #10b981;
  border-radius: 50%;
}

.interactive-term-screen {
  min-height: 280px;
  max-height: 420px;
  padding: 1.25rem 1.5rem;
}

.term-welcome-msg {
  margin-bottom: 1rem;
  line-height: 1.6;
}

.highlight-cmd {
  color: var(--accent-cyan);
  font-weight: 700;
}

.term-input-line {
  display: flex;
  align-items: center;
  margin-top: 0.5rem;
}

.term-input {
  flex: 1;
  background: transparent;
  border: none;
  outline: none;
  font-family: var(--font-mono);
  font-size: 0.9rem;
  color: #ffffff;
  padding: 0;
}

.term-input::placeholder {
  color: rgba(255, 255, 255, 0.25);
}

/* --- FAQ Section (SEO Optimized) --- */
.faq-section {
  position: relative;
  padding: 5rem 0;
}

.faq-list {
  max-width: 860px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.faq-item {
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: 12px;
  background: var(--card-bg);
  overflow: hidden;
  transition: all var(--transition-normal);
}

.faq-item:hover {
  border-color: var(--card-border-hover);
}

.faq-item.active {
  border-color: rgba(0, 229, 255, 0.4);
  box-shadow: 0 4px 20px rgba(0, 229, 255, 0.1);
}

.faq-question {
  width: 100%;
  padding: 1.25rem 1.5rem;
  background: transparent;
  border: none;
  color: var(--text-primary);
  font-family: var(--font-sans);
  font-size: 1.05rem;
  font-weight: 600;
  text-align: left;
  display: flex;
  justify-content: space-between;
  align-items: center;
  cursor: pointer;
  gap: 1rem;
}

.faq-question:hover {
  color: var(--accent-cyan);
}

.faq-icon {
  font-size: 1.2rem;
  color: var(--accent-cyan);
  transition: transform var(--transition-normal);
  font-family: var(--font-mono);
  font-weight: 700;
  flex-shrink: 0;
}

.faq-item.active .faq-icon {
  transform: rotate(45deg);
}

.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.35s ease-out, padding 0.35s ease-out;
  padding: 0 1.5rem;
}

.faq-item.active .faq-answer {
  max-height: 300px;
  padding: 0 1.5rem 1.4rem;
}

.faq-answer p {
  color: var(--text-secondary);
  font-size: 0.95rem;
  line-height: 1.7;
}

.faq-answer strong {
  color: var(--text-primary);
}

/* --- Contact Section --- */
.contact-card {
  max-width: 920px;
  margin: 0 auto;
  padding: 3.5rem 3rem;
  border: 1px solid rgba(0, 229, 255, 0.25);
}

.domain-tag {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 0.85rem;
  color: var(--accent-cyan);
  background: rgba(0, 229, 255, 0.1);
  border: 1px solid rgba(0, 229, 255, 0.3);
  padding: 0.3rem 0.8rem;
  border-radius: 999px;
  margin-bottom: 1rem;
}

.contact-title {
  font-size: 2.2rem;
  margin-bottom: 0.75rem;
}

.contact-desc {
  max-width: 580px;
  margin: 0 auto 2.5rem;
  font-size: 1rem;
}

.contact-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.25rem;
  margin-bottom: 2rem;
}

.contact-method-card {
  display: flex;
  align-items: center;
  gap: 1rem;
  padding: 1.25rem 0.5rem;
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: 12px;
  transition: all var(--transition-normal);
}

.contact-method-card:hover {
  background: rgba(255, 255, 255, 0.06);
  border-color: rgba(0, 229, 255, 0.3);
}

.method-icon {
  width: 44px;
  height: 44px;
  background: rgba(0, 229, 255, 0.1);
  color: var(--accent-cyan);
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.method-info {
  display: flex;
  flex-direction: column;
  flex: 1;
}

.method-label {
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--text-muted);
}

.method-value {
  font-weight: 600;
  font-size: 0.95rem;
  color: var(--text-primary);
}

.method-value:hover {
  color: var(--accent-cyan);
}

.badge-status-online {
  font-size: 0.75rem;
  font-weight: 700;
  color: #10b981;
  background: rgba(16, 185, 129, 0.15);
  border: 1px solid rgba(16, 185, 129, 0.3);
  padding: 0.2rem 0.6rem;
  border-radius: 999px;
}

.cli-snippet-box {
  background: #090c13;
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: 10px;
  padding: 1rem 1.25rem;
  font-family: var(--font-mono);
}

.cli-snippet-label {
  font-size: 0.75rem;
  color: var(--text-muted);
  margin-bottom: 0.4rem;
}

.cli-code-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.cli-code-row code {
  color: #38bdf8;
  font-size: 0.88rem;
}

.copy-btn-sm {
  background: rgba(255, 255, 255, 0.08);
  border: none;
  color: var(--text-secondary);
  padding: 0.35rem 0.5rem;
  border-radius: 6px;
  cursor: pointer;
  transition: all var(--transition-fast);
}

.copy-btn-sm:hover {
  background: var(--accent-cyan);
  color: #000000;
}

/* --- Toast Notification --- */
.toast {
  position: fixed;
  bottom: 2rem;
  right: 2rem;
  z-index: 1000;
  display: flex;
  align-items: center;
  gap: 0.65rem;
  padding: 0.85rem 1.4rem;
  background: #0f172a;
  border: 1px solid var(--accent-cyan);
  border-radius: 10px;
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.6), 0 0 20px rgba(0, 229, 255, 0.3);
  font-weight: 600;
  font-size: 0.9rem;
  color: #ffffff;
  transform: translateY(100px);
  opacity: 0;
  transition: all var(--transition-normal);
  pointer-events: none;
}

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

.toast-icon {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 22px;
  height: 22px;
  background: var(--accent-cyan);
  color: #000;
  border-radius: 50%;
  font-weight: 800;
  font-size: 0.8rem;
}

/* --- Footer --- */
.site-footer {
  border-top: 1px solid rgba(255, 255, 255, 0.06);
  background: #07090f;
  padding: 2rem 0;
}

.footer-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 1rem;
}

.footer-brand {
  font-weight: 700;
  color: var(--text-primary);
}

.footer-domain {
  color: var(--accent-cyan);
  font-family: var(--font-mono);
  font-size: 0.85rem;
}

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

.back-to-top {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--text-secondary);
}

.back-to-top:hover {
  color: var(--accent-cyan);
}

/* --- Responsive Breakpoints --- */
@media (max-width: 1024px) {
  .hero-grid {
    grid-template-columns: 1fr;
    gap: 3rem;
  }

  .pipeline-flow {
    flex-direction: column;
  }

  .pipeline-connector {
    transform: rotate(90deg);
    padding: 0.5rem 0;
  }
}

@media (max-width: 768px) {

  .desktop-nav,
  .status-pill {
    display: none;
  }

  .mobile-toggle {
    display: flex;
  }

  .hero-title {
    font-size: 2.35rem;
  }

  .hero-metrics {
    flex-direction: column;
    align-items: flex-start;
    gap: 1rem;
  }

  .metric-divider {
    display: none;
  }

  .contact-card {
    padding: 2rem 1.5rem;
  }
}