/* ============================================
   Career Dashboard — Dark Theme
   ============================================ */

@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700&family=JetBrains+Mono:wght@400;500;600;700&display=swap');

/* --- Variables --- */
:root {
  --bg: #0a0a0a;
  --bg-card: rgba(255, 255, 255, 0.03);
  --bg-card-hover: rgba(255, 255, 255, 0.06);
  --border: rgba(255, 255, 255, 0.08);
  --border-hover: rgba(255, 255, 255, 0.15);
  --text: #e4e4e7;
  --text-muted: #a1a1aa;
  --text-dim: #71717a;
  --cyan: #00d4ff;
  --purple: #8b5cf6;
  --green: #10b981;
  --pink: #ec4899;
  --orange: #f59e0b;
  --font-body: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
  --font-mono: 'JetBrains Mono', 'Fira Code', monospace;
  --max-width: 1100px;
  --nav-height: 60px;
}

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

html {
  scroll-behavior: smooth;
  scroll-padding-top: calc(var(--nav-height) + 20px);
}

body {
  font-family: var(--font-body);
  background: var(--bg);
  color: var(--text);
  line-height: 1.7;
  min-height: 100vh;
  -webkit-font-smoothing: antialiased;
}

/* --- Animated Background --- */
body::before {
  content: '';
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background:
    radial-gradient(ellipse at 20% 50%, rgba(139, 92, 246, 0.06) 0%, transparent 50%),
    radial-gradient(ellipse at 80% 20%, rgba(0, 212, 255, 0.04) 0%, transparent 50%),
    radial-gradient(ellipse at 50% 80%, rgba(16, 185, 129, 0.03) 0%, transparent 50%);
  pointer-events: none;
  z-index: 0;
  animation: bgShift 20s ease-in-out infinite alternate;
}

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

/* --- Navigation --- */
nav {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(10, 10, 10, 0.85);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--border);
  height: var(--nav-height);
  display: flex;
  align-items: center;
}

nav .nav-inner {
  max-width: var(--max-width);
  width: 100%;
  margin: 0 auto;
  padding: 0 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

nav .nav-brand {
  font-family: var(--font-mono);
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--cyan);
  text-decoration: none;
  letter-spacing: -0.02em;
}

nav .nav-brand span {
  color: var(--text-muted);
}

nav .nav-links {
  display: flex;
  gap: 4px;
}

nav .nav-links a {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--text-muted);
  text-decoration: none;
  padding: 8px 14px;
  border-radius: 8px;
  transition: all 0.2s ease;
}

nav .nav-links a:hover {
  color: var(--text);
  background: rgba(255, 255, 255, 0.05);
}

nav .nav-links a.active {
  color: var(--cyan);
  background: rgba(0, 212, 255, 0.08);
}

.nav-toggle {
  display: none;
  background: none;
  border: none;
  color: var(--text-muted);
  font-size: 1.4rem;
  cursor: pointer;
  padding: 8px;
}

/* --- Layout --- */
main {
  position: relative;
  z-index: 1;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 40px 24px 80px;
}

/* --- Hero (Landing page) --- */
.hero {
  text-align: center;
  padding: 80px 0 60px;
}

.hero-terminal {
  font-family: var(--font-mono);
  font-size: 1.1rem;
  color: var(--text-dim);
  margin-bottom: 16px;
}

.hero-terminal .prompt {
  color: var(--green);
}

.hero-terminal .cursor {
  display: inline-block;
  width: 10px;
  height: 1.2em;
  background: var(--cyan);
  margin-left: 4px;
  vertical-align: text-bottom;
  animation: blink 1s step-end infinite;
}

@keyframes blink {
  50% { opacity: 0; }
}

.hero h1 {
  font-family: var(--font-mono);
  font-size: 2.5rem;
  font-weight: 700;
  background: linear-gradient(135deg, var(--cyan), var(--purple));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  margin-bottom: 12px;
}

.hero p {
  color: var(--text-muted);
  font-size: 1.05rem;
  max-width: 500px;
  margin: 0 auto;
}

/* --- Card Grid --- */
.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 20px;
  margin-top: 40px;
}

.card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 28px;
  text-decoration: none;
  color: var(--text);
  transition: all 0.3s ease;
  position: relative;
  overflow: hidden;
}

.card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 2px;
  background: linear-gradient(90deg, transparent, var(--cyan), transparent);
  opacity: 0;
  transition: opacity 0.3s ease;
}

.card:hover {
  background: var(--bg-card-hover);
  border-color: var(--border-hover);
  transform: translateY(-4px);
  box-shadow: 0 12px 40px rgba(0, 0, 0, 0.3);
}

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

.card-icon {
  font-size: 1.8rem;
  margin-bottom: 16px;
  display: block;
}

.card h3 {
  font-family: var(--font-mono);
  font-size: 1rem;
  font-weight: 600;
  margin-bottom: 8px;
  color: var(--text);
}

.card p {
  color: var(--text-muted);
  font-size: 0.88rem;
  line-height: 1.6;
}

.card .card-arrow {
  position: absolute;
  bottom: 20px;
  right: 20px;
  color: var(--text-dim);
  font-size: 1.1rem;
  transition: all 0.3s ease;
}

.card:hover .card-arrow {
  color: var(--cyan);
  transform: translateX(4px);
}

/* --- Page Header --- */
.page-header {
  margin-bottom: 40px;
  padding-bottom: 24px;
  border-bottom: 1px solid var(--border);
}

.page-header h1 {
  font-family: var(--font-mono);
  font-size: 1.8rem;
  font-weight: 700;
  background: linear-gradient(135deg, var(--cyan), var(--purple));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  margin-bottom: 8px;
}

.page-header p {
  color: var(--text-muted);
  font-size: 0.95rem;
}

/* --- Markdown Content --- */
.markdown-body {
  max-width: 800px;
}

.markdown-body h1 {
  font-family: var(--font-mono);
  font-size: 1.6rem;
  font-weight: 700;
  background: linear-gradient(135deg, var(--cyan), var(--purple));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  margin: 48px 0 16px;
  padding-bottom: 8px;
  border-bottom: 1px solid var(--border);
}

.markdown-body h2 {
  font-family: var(--font-mono);
  font-size: 1.3rem;
  font-weight: 600;
  color: var(--cyan);
  margin: 40px 0 12px;
}

.markdown-body h3 {
  font-family: var(--font-mono);
  font-size: 1.05rem;
  font-weight: 600;
  color: var(--purple);
  margin: 28px 0 10px;
}

.markdown-body h4 {
  font-family: var(--font-mono);
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--green);
  margin: 20px 0 8px;
}

.markdown-body p {
  margin: 12px 0;
  color: var(--text);
}

.markdown-body strong {
  color: #fff;
  font-weight: 600;
}

.markdown-body em {
  color: var(--text-muted);
  font-style: italic;
}

.markdown-body a {
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 1px solid rgba(0, 212, 255, 0.3);
  transition: border-color 0.2s;
}

.markdown-body a:hover {
  border-color: var(--cyan);
}

.markdown-body ul, .markdown-body ol {
  margin: 12px 0;
  padding-left: 24px;
}

.markdown-body li {
  margin: 6px 0;
  color: var(--text);
}

.markdown-body li::marker {
  color: var(--text-dim);
}

/* Checkboxes */
.markdown-body input[type="checkbox"] {
  appearance: none;
  -webkit-appearance: none;
  width: 16px;
  height: 16px;
  border: 2px solid var(--text-dim);
  border-radius: 4px;
  background: transparent;
  vertical-align: middle;
  margin-right: 8px;
  position: relative;
  cursor: default;
}

.markdown-body input[type="checkbox"]:checked {
  background: var(--green);
  border-color: var(--green);
}

.markdown-body input[type="checkbox"]:checked::after {
  content: '\2713';
  position: absolute;
  top: -2px;
  left: 2px;
  font-size: 12px;
  color: #fff;
  font-weight: 700;
}

/* Tables */
.markdown-body table {
  width: 100%;
  border-collapse: collapse;
  margin: 20px 0;
  font-size: 0.9rem;
  overflow-x: auto;
  display: block;
}

.markdown-body thead {
  display: table-header-group;
}

.markdown-body tbody {
  display: table-row-group;
}

.markdown-body tr {
  display: table-row;
}

.markdown-body th, .markdown-body td {
  display: table-cell;
}

.markdown-body table {
  display: table;
}

@media (max-width: 700px) {
  .markdown-body table {
    display: block;
    overflow-x: auto;
  }
}

.markdown-body th {
  background: rgba(139, 92, 246, 0.1);
  color: var(--purple);
  font-family: var(--font-mono);
  font-size: 0.82rem;
  font-weight: 600;
  text-align: left;
  padding: 10px 14px;
  border-bottom: 2px solid var(--border);
}

.markdown-body td {
  padding: 10px 14px;
  border-bottom: 1px solid var(--border);
  color: var(--text);
}

.markdown-body tr:hover td {
  background: rgba(255, 255, 255, 0.02);
}

/* Code */
.markdown-body code {
  font-family: var(--font-mono);
  background: rgba(139, 92, 246, 0.1);
  color: var(--purple);
  padding: 2px 6px;
  border-radius: 4px;
  font-size: 0.88em;
}

.markdown-body pre {
  background: rgba(0, 0, 0, 0.4);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 20px;
  overflow-x: auto;
  margin: 20px 0;
}

.markdown-body pre code {
  background: transparent;
  color: var(--text);
  padding: 0;
  font-size: 0.85rem;
  line-height: 1.6;
}

/* Blockquotes */
.markdown-body blockquote {
  border-left: 3px solid var(--purple);
  padding: 12px 20px;
  margin: 20px 0;
  background: rgba(139, 92, 246, 0.05);
  border-radius: 0 8px 8px 0;
}

.markdown-body blockquote p {
  color: var(--text-muted);
}

/* Horizontal rule */
.markdown-body hr {
  border: none;
  border-top: 1px solid var(--border);
  margin: 32px 0;
}

/* --- Resource Cards --- */
.resource-category {
  margin-bottom: 48px;
}

.resource-category h2 {
  font-family: var(--font-mono);
  font-size: 1.15rem;
  font-weight: 600;
  margin-bottom: 20px;
  display: flex;
  align-items: center;
  gap: 10px;
}

.resource-category h2 .cat-icon {
  font-size: 1.3rem;
}

.resource-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 20px;
  text-decoration: none;
  color: var(--text);
  transition: all 0.2s ease;
  display: block;
}

.resource-card:hover {
  background: var(--bg-card-hover);
  border-color: var(--border-hover);
  transform: translateY(-2px);
}

.resource-card h4 {
  font-family: var(--font-mono);
  font-size: 0.9rem;
  font-weight: 600;
  margin-bottom: 4px;
}

.resource-card p {
  color: var(--text-muted);
  font-size: 0.82rem;
  line-height: 1.5;
}

.resource-card .resource-tag {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 0.7rem;
  padding: 2px 8px;
  border-radius: 6px;
  margin-top: 8px;
  background: rgba(0, 212, 255, 0.1);
  color: var(--cyan);
}

.resource-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: 14px;
}

/* --- Blog Cards --- */
.blog-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 24px;
  text-decoration: none;
  color: var(--text);
  transition: all 0.3s ease;
  display: block;
}

.blog-card:hover {
  background: var(--bg-card-hover);
  border-color: var(--border-hover);
  transform: translateY(-3px);
  box-shadow: 0 8px 30px rgba(0, 0, 0, 0.2);
}

.blog-card .blog-date {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: var(--text-dim);
  margin-bottom: 8px;
}

.blog-card h3 {
  font-family: var(--font-mono);
  font-size: 1rem;
  font-weight: 600;
  margin-bottom: 8px;
}

.blog-card p {
  color: var(--text-muted);
  font-size: 0.88rem;
  line-height: 1.6;
}

.blog-card .blog-tags {
  margin-top: 12px;
  display: flex;
  gap: 6px;
  flex-wrap: wrap;
}

.blog-card .blog-tag {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  padding: 2px 8px;
  border-radius: 6px;
  background: rgba(139, 92, 246, 0.1);
  color: var(--purple);
}

/* Blog reader */
.blog-back {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-family: var(--font-mono);
  font-size: 0.85rem;
  color: var(--text-muted);
  text-decoration: none;
  margin-bottom: 24px;
  transition: color 0.2s;
}

.blog-back:hover {
  color: var(--cyan);
}

.blog-meta {
  font-family: var(--font-mono);
  font-size: 0.82rem;
  color: var(--text-dim);
  margin-bottom: 32px;
}

/* --- Loading State --- */
.loading {
  text-align: center;
  padding: 60px 0;
  color: var(--text-dim);
  font-family: var(--font-mono);
  font-size: 0.9rem;
}

.loading::after {
  content: '';
  display: inline-block;
  width: 18px;
  height: 18px;
  border: 2px solid var(--border);
  border-top-color: var(--cyan);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
  margin-left: 10px;
  vertical-align: middle;
}

@keyframes spin {
  to { transform: rotate(360deg); }
}

/* --- Footer --- */
footer {
  position: relative;
  z-index: 1;
  text-align: center;
  padding: 40px 24px;
  border-top: 1px solid var(--border);
  color: var(--text-dim);
  font-family: var(--font-mono);
  font-size: 0.78rem;
}

/* --- Responsive --- */
@media (max-width: 768px) {
  .hero h1 {
    font-size: 1.8rem;
  }

  .hero-terminal {
    font-size: 0.9rem;
  }

  .card-grid {
    grid-template-columns: 1fr;
  }

  .resource-grid {
    grid-template-columns: 1fr;
  }

  main {
    padding: 24px 16px 60px;
  }

  .page-header h1 {
    font-size: 1.4rem;
  }

  /* Mobile nav */
  .nav-toggle {
    display: block;
  }

  nav .nav-links {
    display: none;
    position: absolute;
    top: var(--nav-height);
    left: 0;
    right: 0;
    background: rgba(10, 10, 10, 0.95);
    backdrop-filter: blur(20px);
    flex-direction: column;
    padding: 12px;
    border-bottom: 1px solid var(--border);
  }

  nav .nav-links.open {
    display: flex;
  }

  nav .nav-links a {
    padding: 12px 16px;
  }
}

@media (max-width: 480px) {
  .hero h1 {
    font-size: 1.4rem;
  }

  .card {
    padding: 20px;
  }
}