/* ═══════════════════════════════════════════════════════════════════════════
   AZSYSTECH.DE - Terminal/Geek Theme
   SysAdmin Blog - Linux, Cloud, Network, Containers
   ═══════════════════════════════════════════════════════════════════════════ */

@import url('https://fonts.googleapis.com/css2?family=Fira+Code:wght@400;500;600&family=JetBrains+Mono:wght@400;500;600&display=swap');

:root {
  --terminal-green: #00ff88;
  --terminal-cyan: #00d4ff;
  --terminal-orange: #ffaa00;
  --terminal-red: #ff5555;
  --terminal-purple: #bd93f9;
  --terminal-pink: #ff79c6;
  --bg-dark: #0a0e1a;
  --bg-terminal: #0d1117;
  --border-glow: #1e3a5f;
}

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

body {
  font-family: 'Segoe UI', system-ui, -apple-system, sans-serif;
  background: var(--bg-dark);
  color: #e0e6f0;
  line-height: 1.7;
  min-height: 100vh;
  position: relative;
}

/* Matrix-like background pattern */
body::before {
  content: '';
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-image:
    radial-gradient(circle at 20% 50%, rgba(0, 255, 136, 0.03) 0%, transparent 50%),
    radial-gradient(circle at 80% 20%, rgba(0, 212, 255, 0.03) 0%, transparent 50%),
    radial-gradient(circle at 40% 80%, rgba(189, 147, 249, 0.02) 0%, transparent 50%);
  pointer-events: none;
  z-index: -1;
}

/* Blinking cursor animation */
@keyframes blink {
  0%, 50% { opacity: 1; }
  51%, 100% { opacity: 0; }
}

@keyframes typing {
  from { width: 0; }
  to { width: 100%; }
}

@keyframes glow {
  0%, 100% { box-shadow: 0 0 5px var(--terminal-green), 0 0 10px rgba(0, 255, 136, 0.3); }
  50% { box-shadow: 0 0 10px var(--terminal-green), 0 0 20px rgba(0, 255, 136, 0.5); }
}

@keyframes pulse {
  0%, 100% { opacity: 0.5; }
  50% { opacity: 1; }
}

@keyframes float {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-5px); }
}

.cursor {
  display: inline-block;
  width: 10px;
  height: 1.2em;
  background: var(--terminal-green);
  margin-left: 4px;
  animation: blink 1s infinite;
  vertical-align: middle;
}

.container {
  max-width: 900px;
  margin: 0 auto;
  padding: 20px;
}

a {
  color: #60a5fa;
  text-decoration: none;
  transition: color 0.2s ease;
}

a:hover {
  color: #4a7dff;
}

/* ─────────────────────────────────────────────────────────────────────────────
   HEADER & NAVIGATION - Terminal Style
   ───────────────────────────────────────────────────────────────────────────── */
header {
  background: var(--bg-terminal);
  border-bottom: 1px solid var(--border-glow);
  padding: 0;
  position: sticky;
  top: 0;
  z-index: 100;
}

.header-container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 16px 20px;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.logo {
  font-family: 'Fira Code', 'JetBrains Mono', monospace;
  font-size: 1rem;
  font-weight: 500;
  color: var(--terminal-green);
  display: flex;
  align-items: center;
  gap: 0;
}

.logo .prompt {
  color: var(--terminal-cyan);
}

.logo .user {
  color: var(--terminal-orange);
}

.logo .at {
  color: #888;
}

.logo .host {
  color: var(--terminal-purple);
}

.logo .path {
  color: var(--terminal-cyan);
}

.logo .command {
  color: #fff;
  margin-left: 8px;
}

nav {
  display: flex;
  gap: 8px;
}

nav a {
  font-family: 'Fira Code', monospace;
  padding: 8px 14px;
  background: rgba(0, 255, 136, 0.05);
  border: 1px solid rgba(0, 255, 136, 0.2);
  border-radius: 4px;
  font-size: 0.8rem;
  color: var(--terminal-green);
  transition: all 0.2s ease;
  position: relative;
}

nav a::before {
  content: './';
  color: #666;
}

nav a:hover, nav a.active {
  border-color: var(--terminal-green);
  color: #fff;
  background: rgba(0, 255, 136, 0.1);
  box-shadow: 0 0 10px rgba(0, 255, 136, 0.2);
}

@media (max-width: 600px) {
  .header-container {
    flex-direction: column;
    gap: 12px;
  }
  nav {
    flex-wrap: wrap;
    justify-content: center;
  }
  .logo {
    font-size: 0.85rem;
  }
}

/* ─────────────────────────────────────────────────────────────────────────────
   PAGE HEADER / HERO - Terminal Style
   ───────────────────────────────────────────────────────────────────────────── */
.page-header {
  text-align: center;
  padding: 40px 0 30px;
  position: relative;
}

.page-header h1 {
  font-family: 'Fira Code', monospace;
  font-size: 1.6rem;
  color: var(--terminal-green);
  margin-bottom: 12px;
  text-shadow: 0 0 20px rgba(0, 255, 136, 0.3);
}

.page-header h1::before {
  content: '$ ';
  color: var(--terminal-cyan);
}

.page-header .subtitle {
  font-family: 'Fira Code', monospace;
  color: #7b8ba8;
  font-size: 0.9rem;
}

.page-header .subtitle::before {
  content: '# ';
  color: #555;
}

/* Tech decoration icons */
.tech-icons {
  display: flex;
  justify-content: center;
  gap: 20px;
  margin-top: 20px;
  flex-wrap: wrap;
}

.tech-icon {
  font-family: 'Fira Code', monospace;
  font-size: 0.75rem;
  padding: 6px 12px;
  background: rgba(0, 212, 255, 0.05);
  border: 1px solid rgba(0, 212, 255, 0.2);
  border-radius: 4px;
  color: var(--terminal-cyan);
  animation: pulse 3s infinite;
}

.tech-icon:nth-child(2) { animation-delay: 0.5s; color: var(--terminal-orange); border-color: rgba(255, 170, 0, 0.2); background: rgba(255, 170, 0, 0.05); }
.tech-icon:nth-child(3) { animation-delay: 1s; color: var(--terminal-purple); border-color: rgba(189, 147, 249, 0.2); background: rgba(189, 147, 249, 0.05); }
.tech-icon:nth-child(4) { animation-delay: 1.5s; color: var(--terminal-green); border-color: rgba(0, 255, 136, 0.2); background: rgba(0, 255, 136, 0.05); }
.tech-icon:nth-child(5) { animation-delay: 2s; color: var(--terminal-pink); border-color: rgba(255, 121, 198, 0.2); background: rgba(255, 121, 198, 0.05); }

/* ─────────────────────────────────────────────────────────────────────────────
   ABOUT SECTION - Terminal Window Style
   ───────────────────────────────────────────────────────────────────────────── */
.about-box {
  background: var(--bg-terminal);
  border: 1px solid var(--terminal-green);
  border-radius: 8px;
  position: relative;
  overflow: hidden;
  box-shadow: 0 0 20px rgba(0, 255, 136, 0.1);
}

.about-box::before {
  content: '┌──[ramses@sysadmin]─[~/about]';
  display: block;
  font-family: 'Fira Code', monospace;
  font-size: 0.8rem;
  color: var(--terminal-green);
  padding: 12px 16px;
  background: rgba(0, 255, 136, 0.05);
  border-bottom: 1px solid rgba(0, 255, 136, 0.2);
}

.terminal-bar {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 10px 16px;
  background: #1a1a2e;
  border-bottom: 1px solid #2a3450;
}

.terminal-btn {
  width: 12px;
  height: 12px;
  border-radius: 50%;
}

.terminal-btn.red { background: #ff5f56; }
.terminal-btn.yellow { background: #ffbd2e; }
.terminal-btn.green { background: #27ca40; }

.terminal-title {
  font-family: 'Fira Code', monospace;
  font-size: 0.75rem;
  color: #666;
  margin-left: auto;
}
  padding: 28px;
  margin-bottom: 30px;
}

.about-content {
  display: flex;
  gap: 24px;
  align-items: flex-start;
}

.profile-photo {
  width: 120px;
  height: 120px;
  border-radius: 50%;
  object-fit: cover;
  border: 3px solid #4a7dff;
  flex-shrink: 0;
}

.about-text {
  flex: 1;
}

@media (max-width: 600px) {
  .about-content {
    flex-direction: column;
    align-items: center;
    text-align: center;
  }
}

.about-box h2 {
  font-family: 'Fira Code', monospace;
  color: var(--terminal-green);
  font-size: 1rem;
  margin-bottom: 16px;
  display: flex;
  align-items: center;
  gap: 10px;
}

.about-box h2::before {
  content: '└──$ ';
  color: var(--terminal-cyan);
}

.about-box p {
  color: #b0c4e8;
  font-size: 0.9rem;
  margin-bottom: 12px;
  padding-left: 20px;
  border-left: 2px solid rgba(0, 255, 136, 0.2);
}

.about-box .skills {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 20px;
  padding-top: 16px;
  border-top: 1px dashed rgba(0, 255, 136, 0.2);
}

.about-box .skills::before {
  content: '# installed packages:';
  display: block;
  width: 100%;
  font-family: 'Fira Code', monospace;
  font-size: 0.75rem;
  color: #666;
  margin-bottom: 8px;
}

.skill-tag {
  font-family: 'Fira Code', monospace;
  background: rgba(0, 212, 255, 0.1);
  border: 1px solid rgba(0, 212, 255, 0.3);
  padding: 4px 10px;
  border-radius: 4px;
  font-size: 0.7rem;
  color: var(--terminal-cyan);
  transition: all 0.2s ease;
}

.skill-tag:hover {
  background: rgba(0, 212, 255, 0.2);
  box-shadow: 0 0 10px rgba(0, 212, 255, 0.3);
}

.skill-tag::before {
  content: '📦 ';
  font-size: 0.65rem;
}

/* ─────────────────────────────────────────────────────────────────────────────
   ARTICLES LIST
   ───────────────────────────────────────────────────────────────────────────── */
.section-title {
  font-size: 1.1rem;
  color: #fff;
  margin-bottom: 16px;
  padding-bottom: 8px;
  border-bottom: 1px solid #1e2a45;
}

.articles-list {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.article-card {
  background: #111827;
  border: 1px solid #1e2a45;
  border-radius: 12px;
  padding: 18px 22px;
  transition: all 0.2s ease;
  display: block;
}

.article-card:hover {
  border-color: #4a7dff;
  transform: translateX(4px);
  box-shadow: 0 4px 20px rgba(74, 125, 255, 0.1);
}

.article-card h3 {
  color: #fff;
  font-size: 1rem;
  margin-bottom: 6px;
}

.article-card .meta {
  font-size: 0.78rem;
  color: #6b7fa0;
  margin-bottom: 8px;
}

.article-card .excerpt {
  font-size: 0.88rem;
  color: #8899b5;
}

.article-card .tags {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-top: 10px;
}

.tag {
  background: #1a1e2e;
  padding: 3px 8px;
  border-radius: 4px;
  font-size: 0.7rem;
  color: #7b8ba8;
}

/* ─────────────────────────────────────────────────────────────────────────────
   ARTICLE CONTENT
   ───────────────────────────────────────────────────────────────────────────── */
.article-content {
  background: #111827;
  border: 1px solid #1e2a45;
  border-radius: 14px;
  padding: 32px;
}

.article-content h1 {
  color: #fff;
  font-size: 1.6rem;
  margin-bottom: 8px;
}

.article-content .meta {
  color: #6b7fa0;
  font-size: 0.85rem;
  margin-bottom: 24px;
  padding-bottom: 16px;
  border-bottom: 1px solid #1e2a45;
}

.article-content h2 {
  color: #fff;
  font-size: 1.25rem;
  margin: 28px 0 14px;
  padding-top: 16px;
  border-top: 1px solid #1e2a45;
}

.article-content h2:first-of-type {
  border-top: none;
  padding-top: 0;
}

.article-content h3 {
  color: #e0e8ff;
  font-size: 1.05rem;
  margin: 20px 0 10px;
}

.article-content p {
  color: #b0c4e8;
  margin-bottom: 14px;
}

.article-content ul, .article-content ol {
  color: #b0c4e8;
  padding-left: 24px;
  margin-bottom: 14px;
}

.article-content li {
  margin-bottom: 6px;
}

.article-content strong {
  color: #e0e8ff;
}

.article-content code {
  background: #0d1220;
  color: #60a5fa;
  padding: 2px 6px;
  border-radius: 4px;
  font-family: 'Cascadia Code', 'Fira Code', monospace;
  font-size: 0.88em;
}

.article-content pre {
  background: #0d1220;
  border: 1px solid #1a2540;
  border-radius: 10px;
  padding: 16px 18px;
  overflow-x: auto;
  margin: 16px 0;
}

.article-content pre code {
  background: transparent;
  padding: 0;
  color: #c8d6f0;
  font-size: 0.85rem;
  line-height: 1.6;
}

.article-content blockquote {
  background: #1a1e2e;
  border-left: 3px solid #fbbf24;
  padding: 12px 16px;
  border-radius: 0 8px 8px 0;
  margin: 16px 0;
}

.article-content blockquote p {
  color: #d4dce8;
  margin: 0;
}

.article-content table {
  width: 100%;
  border-collapse: collapse;
  margin: 16px 0;
  background: #0d1220;
  border-radius: 10px;
  overflow: hidden;
}

.article-content th {
  background: #151b2e;
  color: #fff;
  padding: 12px 14px;
  text-align: left;
  font-size: 0.85rem;
}

.article-content td {
  padding: 10px 14px;
  border-top: 1px solid #1e2a45;
  color: #b0c4e8;
  font-size: 0.88rem;
}

.article-content hr {
  border: none;
  border-top: 1px solid #1e2a45;
  margin: 24px 0;
}

/* ─────────────────────────────────────────────────────────────────────────────
   SPECIAL BOXES
   ───────────────────────────────────────────────────────────────────────────── */
.analogy {
  background: #1a1e2e;
  border-left: 3px solid #fbbf24;
  padding: 14px 18px;
  border-radius: 0 8px 8px 0;
  margin: 16px 0;
}

.analogy::before {
  content: "ANALOGY";
  display: block;
  font-size: 0.7rem;
  text-transform: uppercase;
  letter-spacing: 1px;
  color: #fbbf24;
  margin-bottom: 8px;
  font-weight: 700;
}

.analogy p { color: #d4dce8; margin: 0; font-size: 0.9rem; }

.technical {
  background: #0d1220;
  border: 1px solid #1a2540;
  border-radius: 10px;
  padding: 16px 18px;
  margin: 16px 0;
}

.technical::before {
  content: "TECHNICAL DETAIL";
  display: block;
  font-size: 0.7rem;
  text-transform: uppercase;
  letter-spacing: 1px;
  color: #60a5fa;
  margin-bottom: 8px;
  font-weight: 700;
}

.technical p, .technical li { color: #b0c4e8; font-size: 0.88rem; }

.key-point {
  background: #0f2e1a;
  border: 1px solid #1a4a2a;
  border-radius: 8px;
  padding: 12px 16px;
  margin: 16px 0;
}

.key-point::before {
  content: "KEY POINT";
  display: block;
  font-size: 0.7rem;
  text-transform: uppercase;
  letter-spacing: 1px;
  color: #4ade80;
  margin-bottom: 6px;
  font-weight: 700;
}

.key-point p { color: #4ade80; margin: 0; font-size: 0.88rem; }
.key-point strong { color: #86efac; }

.warning {
  background: #2a1a10;
  border: 1px solid #4a2a10;
  border-radius: 8px;
  padding: 12px 16px;
  margin: 16px 0;
}

.warning::before {
  content: "WARNING";
  display: block;
  font-size: 0.7rem;
  text-transform: uppercase;
  letter-spacing: 1px;
  color: #fbbf24;
  margin-bottom: 6px;
  font-weight: 700;
}

.warning p { color: #fbbf24; margin: 0; font-size: 0.88rem; }

.info {
  background: #101828;
  border: 1px solid #1a3050;
  border-radius: 8px;
  padding: 12px 16px;
  margin: 16px 0;
}

.info::before {
  content: "INFO";
  display: block;
  font-size: 0.7rem;
  text-transform: uppercase;
  letter-spacing: 1px;
  color: #60a5fa;
  margin-bottom: 6px;
  font-weight: 700;
}

.info p { color: #b0c4e8; margin: 0; font-size: 0.88rem; }

/* ─────────────────────────────────────────────────────────────────────────────
   CONTACT PAGE
   ───────────────────────────────────────────────────────────────────────────── */
.contact-box {
  background: #111827;
  border: 1px solid #1e2a45;
  border-radius: 14px;
  padding: 32px;
  text-align: center;
}

.contact-box h2 {
  color: #fff;
  margin-bottom: 20px;
}

.contact-box p {
  color: #b0c4e8;
  margin-bottom: 24px;
}

.contact-methods {
  display: flex;
  flex-direction: column;
  gap: 12px;
  max-width: 300px;
  margin: 0 auto;
}

.contact-item {
  display: flex;
  align-items: center;
  gap: 12px;
  background: #151b2e;
  border: 1px solid #2a3450;
  border-radius: 10px;
  padding: 14px 18px;
  transition: all 0.2s ease;
}

.contact-item:hover {
  border-color: #4a7dff;
  background: #1a2744;
}

.contact-item .icon {
  font-size: 1.3rem;
}

.contact-item .details {
  text-align: left;
}

.contact-item .label {
  font-size: 0.75rem;
  color: #6b7fa0;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.contact-item .value {
  color: #e0e6f0;
  font-size: 0.95rem;
}

/* ─────────────────────────────────────────────────────────────────────────────
   SIDEBAR NAVIGATION - Terminal File Tree Style
   ───────────────────────────────────────────────────────────────────────────── */
.layout {
  display: flex;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 20px 20px;
  gap: 30px;
}

.sidebar {
  width: 260px;
  flex-shrink: 0;
  position: sticky;
  top: 80px;
  height: fit-content;
  max-height: calc(100vh - 100px);
  overflow-y: auto;
  align-self: flex-start;
  background: var(--bg-terminal);
  border: 1px solid rgba(0, 255, 136, 0.3);
  border-radius: 8px;
  padding: 12px;
}

.sidebar::before {
  content: '📁 /var/www/topics';
  display: block;
  font-family: 'Fira Code', monospace;
  font-size: 0.75rem;
  color: var(--terminal-orange);
  padding-bottom: 12px;
  margin-bottom: 12px;
  border-bottom: 1px dashed rgba(0, 255, 136, 0.2);
}

.sidebar-title {
  font-family: 'Fira Code', monospace;
  font-size: 0.7rem;
  text-transform: uppercase;
  letter-spacing: 1px;
  color: var(--terminal-green);
  margin-bottom: 12px;
  padding: 0;
}

.sidebar-title::before {
  content: '$ ls -la ';
  color: var(--terminal-cyan);
}

.sidebar-nav {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.sidebar-category {
  background: rgba(0, 0, 0, 0.3);
  border: 1px solid rgba(0, 212, 255, 0.2);
  border-radius: 4px;
  overflow: hidden;
  transition: all 0.2s ease;
}

.sidebar-category:hover {
  border-color: rgba(0, 212, 255, 0.5);
}

.category-header {
  font-family: 'Fira Code', monospace;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 10px 12px;
  cursor: pointer;
  color: var(--terminal-orange);
  font-size: 0.8rem;
  font-weight: 500;
  transition: all 0.2s ease;
}

.category-header::before {
  content: '📂 ';
  font-size: 0.9rem;
}

.sidebar-category.open .category-header::before {
  content: '📂 ';
}

.category-header:hover {
  background: rgba(255, 170, 0, 0.1);
  color: #fff;
}

.category-header .arrow {
  font-size: 0.6rem;
  transition: transform 0.2s ease;
  color: var(--terminal-cyan);
}

.sidebar-category.open .category-header .arrow {
  transform: rotate(90deg);
}

.category-articles {
  display: none;
  padding: 4px 8px 8px 20px;
  border-left: 2px solid rgba(0, 255, 136, 0.2);
  margin-left: 12px;
}

.sidebar-category.open .category-articles {
  display: block;
}

.category-articles a {
  font-family: 'Fira Code', monospace;
  display: block;
  padding: 6px 10px;
  font-size: 0.75rem;
  color: #8899b5;
  border-radius: 4px;
  transition: all 0.2s ease;
}

.category-articles a::before {
  content: '├── ';
  color: rgba(0, 255, 136, 0.4);
}

.category-articles a:last-child::before {
  content: '└── ';
}

.category-articles a:hover {
  background: rgba(0, 255, 136, 0.1);
  color: var(--terminal-green);
}

.main-content {
  flex: 1;
  min-width: 0;
}

/* Mobile sidebar toggle */
.sidebar-toggle {
  display: none;
  position: fixed;
  bottom: 20px;
  right: 20px;
  width: 50px;
  height: 50px;
  background: var(--terminal-green);
  border: none;
  border-radius: 8px;
  color: #000;
  font-size: 1.2rem;
  cursor: pointer;
  z-index: 1000;
  box-shadow: 0 0 20px rgba(0, 255, 136, 0.4);
  font-family: 'Fira Code', monospace;
}

@media (max-width: 900px) {
  .layout {
    flex-direction: column;
  }

  .sidebar {
    width: 100%;
    position: fixed;
    top: 0;
    left: -100%;
    height: 100vh;
    max-height: 100vh;
    background: #0a0e1a;
    z-index: 999;
    padding: 80px 20px 20px;
    transition: left 0.3s ease;
  }

  .sidebar.open {
    left: 0;
  }

  .sidebar-toggle {
    display: flex;
    align-items: center;
    justify-content: center;
  }

  .main-content {
    width: 100%;
  }
}

/* ─────────────────────────────────────────────────────────────────────────────
   FOOTER - Terminal Style
   ───────────────────────────────────────────────────────────────────────────── */
footer {
  font-family: 'Fira Code', monospace;
  text-align: center;
  padding: 30px 20px;
  color: #6b7fa0;
  font-size: 0.75rem;
  border-top: 1px solid rgba(0, 255, 136, 0.2);
  margin-top: 40px;
  background: var(--bg-terminal);
}

footer::before {
  content: '─────────────────────────────────────────';
  display: block;
  color: rgba(0, 255, 136, 0.2);
  margin-bottom: 16px;
}

footer a {
  color: var(--terminal-green);
}

/* ─────────────────────────────────────────────────────────────────────────────
   BACK LINK
   ───────────────────────────────────────────────────────────────────────────── */
.back-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  color: #6b7fa0;
  font-size: 0.88rem;
  margin-bottom: 20px;
  transition: color 0.2s ease;
}

.back-link:hover {
  color: #60a5fa;
}

/* ─────────────────────────────────────────────────────────────────────────────
   SCROLLBAR
   ───────────────────────────────────────────────────────────────────────────── */
::-webkit-scrollbar { width: 8px; height: 8px; }
::-webkit-scrollbar-track { background: #0a0e1a; }
::-webkit-scrollbar-thumb { background: #2a3450; border-radius: 4px; }
::-webkit-scrollbar-thumb:hover { background: #4a7dff; }

/* ─────────────────────────────────────────────────────────────────────────────
   ANIMATIONS
   ───────────────────────────────────────────────────────────────────────────── */
@keyframes fadeIn {
  from { opacity: 0; transform: translateY(10px); }
  to { opacity: 1; transform: translateY(0); }
}

.article-card, .about-box, .contact-box, .article-content {
  animation: fadeIn 0.3s ease-out;
}