/* ===========================================================================
   Self-hosted Fonts
   =========================================================================== */
@font-face {
  font-family: 'Inter';
  font-style: normal;
  font-weight: 400;
  font-display: swap;
  src: url('/assets/fonts/inter-400.woff2') format('woff2');
  unicode-range: U+0000-00FF, U+0131, U+0152-0153, U+02BB-02BC, U+02C6, U+02DA, U+02DC, U+0304, U+0308, U+0329, U+2000-206F, U+2074, U+20AC, U+2122, U+2191, U+2193, U+2212, U+2215, U+FEFF, U+FFFD;
}
@font-face {
  font-family: 'Inter';
  font-style: normal;
  font-weight: 600;
  font-display: swap;
  src: url('/assets/fonts/inter-600.woff2') format('woff2');
  unicode-range: U+0000-00FF, U+0131, U+0152-0153, U+02BB-02BC, U+02C6, U+02DA, U+02DC, U+0304, U+0308, U+0329, U+2000-206F, U+2074, U+20AC, U+2122, U+2191, U+2193, U+2212, U+2215, U+FEFF, U+FFFD;
}
@font-face {
  font-family: 'Inter';
  font-style: normal;
  font-weight: 700;
  font-display: swap;
  src: url('/assets/fonts/inter-700.woff2') format('woff2');
  unicode-range: U+0000-00FF, U+0131, U+0152-0153, U+02BB-02BC, U+02C6, U+02DA, U+02DC, U+0304, U+0308, U+0329, U+2000-206F, U+2074, U+20AC, U+2122, U+2191, U+2193, U+2212, U+2215, U+FEFF, U+FFFD;
}
@font-face {
  font-family: 'JetBrains Mono';
  font-style: normal;
  font-weight: 400;
  font-display: swap;
  src: url('/assets/fonts/jetbrains-mono-400.woff2') format('woff2');
  unicode-range: U+0000-00FF, U+0131, U+0152-0153, U+02BB-02BC, U+02C6, U+02DA, U+02DC, U+0304, U+0308, U+0329, U+2000-206F, U+2074, U+20AC, U+2122, U+2191, U+2193, U+2212, U+2215, U+FEFF, U+FFFD;
}
@font-face {
  font-family: 'JetBrains Mono';
  font-style: normal;
  font-weight: 600;
  font-display: swap;
  src: url('/assets/fonts/jetbrains-mono-600.woff2') format('woff2');
  unicode-range: U+0000-00FF, U+0131, U+0152-0153, U+02BB-02BC, U+02C6, U+02DA, U+02DC, U+0304, U+0308, U+0329, U+2000-206F, U+2074, U+20AC, U+2122, U+2191, U+2193, U+2212, U+2215, U+FEFF, U+FFFD;
}
@font-face {
  font-family: 'JetBrains Mono';
  font-style: normal;
  font-weight: 700;
  font-display: swap;
  src: url('/assets/fonts/jetbrains-mono-700.woff2') format('woff2');
  unicode-range: U+0000-00FF, U+0131, U+0152-0153, U+02BB-02BC, U+02C6, U+02DA, U+02DC, U+0304, U+0308, U+0329, U+2000-206F, U+2074, U+20AC, U+2122, U+2191, U+2193, U+2212, U+2215, U+FEFF, U+FFFD;
}
@font-face {
  font-family: 'JetBrains Mono';
  font-style: normal;
  font-weight: 800;
  font-display: swap;
  src: url('/assets/fonts/jetbrains-mono-800.woff2') format('woff2');
  unicode-range: U+0000-00FF, U+0131, U+0152-0153, U+02BB-02BC, U+02C6, U+02DA, U+02DC, U+0304, U+0308, U+0329, U+2000-206F, U+2074, U+20AC, U+2122, U+2191, U+2193, U+2212, U+2215, U+FEFF, U+FFFD;
}

/* ===========================================================================
   Design Tokens
   =========================================================================== */
:root {
  --void-black: #08080C;
  --deep-terminal: #0F0F1A;
  --amber-led: #FFB020;
  --amber-glow: #FF8C00;
  --alert-red: #E63946;
  --ghost-white: #E8E8EC;
  --muted-trace: #4A4A5E;
  --steel-grey: #6B7280;
  --glass-border: rgba(255, 176, 32, 0.12);
  --accent-amber: #FFB020;
  --accent-cyan: #00D9FF;
  --accent-magenta: #FF006E;
  --accent-green: #39FF14;
  --content-max: 1080px;
  --content-narrow: 720px;
}

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

html {
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
  background-color: var(--void-black);
  background-image:
    repeating-linear-gradient(-45deg, transparent, transparent 40px, rgba(74,74,94,0.04) 40px, rgba(74,74,94,0.04) 41px),
    repeating-linear-gradient(45deg, transparent, transparent 60px, rgba(74,74,94,0.03) 60px, rgba(74,74,94,0.03) 61px);
  color: var(--ghost-white);
  line-height: 1.6;
  font-size: 16px;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

a {
  color: var(--amber-led);
  text-decoration: none;
}

a:hover {
  color: var(--amber-glow);
}

/* ===========================================================================
   Typography
   =========================================================================== */
h1, h2, h3, h4 {
  font-family: 'JetBrains Mono', monospace;
  letter-spacing: 0.06em;
  line-height: 1.25;
}

p {
  font-family: 'Inter', sans-serif;
  line-height: 1.6;
}

code {
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.875em;
  background: var(--deep-terminal);
  padding: 0.1em 0.35em;
  border-radius: 2px;
  color: var(--ghost-white);
}

/* ===========================================================================
   Header & Navigation
   =========================================================================== */
.site-header {
  border-bottom: 1px solid var(--glass-border);
  padding: 1.25rem 2rem;
  flex-shrink: 0;
}

.nav-inner {
  max-width: var(--content-max);
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 2rem;
}

.nav-brand {
  font-family: 'JetBrains Mono', monospace;
  font-weight: 700;
  font-size: 0.875rem;
  letter-spacing: 0.1em;
  color: var(--ghost-white);
  text-transform: uppercase;
  transition: color 0.15s;
}

.nav-brand::before {
  content: '> ';
  color: var(--amber-led);
}

.nav-brand:hover {
  color: var(--amber-led);
}

.nav-links {
  display: flex;
  gap: 2rem;
  align-items: center;
}

.nav-links a {
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.8rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--steel-grey);
  transition: color 0.15s;
}

.nav-links a:hover,
.nav-links a.active {
  color: var(--amber-led);
}

/* ===========================================================================
   Main Content
   =========================================================================== */
main {
  max-width: var(--content-max);
  margin: 0 auto;
  padding: 4rem 2rem;
  width: 100%;
  flex: 1;
}

main.narrow {
  max-width: var(--content-narrow);
}

/* ===========================================================================
   Footer
   =========================================================================== */
.site-footer {
  border-top: 1px solid var(--glass-border);
  padding: 2rem;
  flex-shrink: 0;
}

.footer-inner {
  max-width: var(--content-max);
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  align-items: center;
  text-align: center;
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.75rem;
  color: var(--muted-trace);
}

.footer-inner a {
  color: var(--muted-trace);
  transition: color 0.15s;
}

.footer-inner a:hover {
  color: var(--amber-led);
}

/* ===========================================================================
   Cards
   =========================================================================== */
.card {
  position: relative;
  background: var(--deep-terminal);
  border: 1.5px solid var(--glass-border);
  border-radius: 4px;
  padding: 1.75rem;
}

/* Corner brackets: top-left */
.card::before {
  content: '';
  position: absolute;
  top: 8px;
  left: 8px;
  width: 12px;
  height: 12px;
  border-top: 1px solid rgba(232, 232, 236, 0.25);
  border-left: 1px solid rgba(232, 232, 236, 0.25);
  pointer-events: none;
}

/* Corner brackets: bottom-right */
.card::after {
  content: '';
  position: absolute;
  bottom: 8px;
  right: 8px;
  width: 12px;
  height: 12px;
  border-bottom: 1px solid rgba(232, 232, 236, 0.25);
  border-right: 1px solid rgba(232, 232, 236, 0.25);
  pointer-events: none;
}

/* Top amber accent bar */
.card.accent-top {
  border-top-color: var(--accent-amber);
  border-top-width: 2px;
}

/* ===========================================================================
   Episode Cards
   =========================================================================== */
a.episode-card {
  display: block;
  transition: border-color 0.15s;
  color: inherit;
}

a.episode-card:hover {
  border-color: rgba(255, 176, 32, 0.4);
  color: inherit;
}

.ep-number {
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.7rem;
  letter-spacing: 0.12em;
  color: var(--accent-amber);
  text-transform: uppercase;
  margin-bottom: 0.5rem;
}

.ep-title {
  font-family: 'JetBrains Mono', monospace;
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--ghost-white);
  letter-spacing: 0.02em;
  margin-bottom: 0.5rem;
  line-height: 1.35;
}

.ep-description {
  font-family: 'Inter', sans-serif;
  font-size: 0.9rem;
  color: var(--steel-grey);
  line-height: 1.5;
  margin-bottom: 1rem;
}

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

.ep-date {
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.7rem;
  color: var(--muted-trace);
  letter-spacing: 0.04em;
}

.ep-cta {
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.8rem;
  color: var(--amber-led);
  letter-spacing: 0.04em;
}

/* ===========================================================================
   Pillar Badges
   =========================================================================== */
.badge {
  display: inline-block;
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.62rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  padding: 0.2rem 0.45rem;
  border-radius: 2px;
}

.badge-build    { color: var(--accent-amber);   border: 1px solid rgba(255,176,32,0.3); }
.badge-deep-dive { color: var(--accent-cyan);   border: 1px solid rgba(0,217,255,0.3); }
.badge-leetcode  { color: var(--accent-magenta); border: 1px solid rgba(255,0,110,0.3); }
.badge-war-story { color: var(--alert-red);      border: 1px solid rgba(230,57,70,0.3); }
.badge-performance { color: var(--accent-green); border: 1px solid rgba(57,255,20,0.3); }

/* ===========================================================================
   Section Headings
   =========================================================================== */
.section-heading {
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.75rem;
  font-weight: 700;
  color: var(--amber-led);
  letter-spacing: 0.14em;
  text-transform: uppercase;
  margin-bottom: 1.5rem;
}

/* ===========================================================================
   Hero
   =========================================================================== */
.hero {
  text-align: center;
  padding: 5rem 0 3.5rem;
}

.hero-logo {
  font-family: 'JetBrains Mono', monospace;
  font-size: 5.5rem;
  font-weight: 800;
  color: var(--amber-led);
  text-shadow: 0 0 24px rgba(255, 176, 32, 0.55), 0 0 60px rgba(255, 176, 32, 0.18);
  line-height: 1;
  letter-spacing: 0.04em;
  margin-bottom: 1.25rem;
  user-select: none;
}

.hero-brand {
  font-family: 'JetBrains Mono', monospace;
  font-size: 1.6rem;
  font-weight: 800;
  color: var(--ghost-white);
  letter-spacing: 0.14em;
  text-transform: uppercase;
  margin-bottom: 0.75rem;
}

.hero-tagline {
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.78rem;
  color: var(--muted-trace);
  letter-spacing: 0.04em;
}

/* ===========================================================================
   Browse Links
   =========================================================================== */
.browse-links {
  display: flex;
  gap: 2.5rem;
  justify-content: center;
  flex-wrap: wrap;
  margin: 2.5rem 0;
}

.browse-links a {
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.85rem;
  letter-spacing: 0.05em;
  color: var(--ghost-white);
  transition: color 0.15s;
}

.browse-links a:hover {
  color: var(--amber-led);
}

/* ===========================================================================
   Code Blocks
   =========================================================================== */
.code-wrap {
  position: relative;
  margin: 1.5rem 0;
}

pre {
  margin: 0;
  border: 1px solid var(--glass-border);
  border-radius: 3px;
  overflow-x: auto;
}

pre code.hljs {
  font-family: 'JetBrains Mono', monospace !important;
  font-size: 13px !important;
  line-height: 1.6 !important;
  padding: 1.5rem !important;
  background: var(--deep-terminal) !important;
  border-radius: 3px;
  display: block;
}

.copy-btn {
  position: absolute;
  top: 0.6rem;
  right: 0.6rem;
  background: rgba(74, 74, 94, 0.5);
  border: 1px solid var(--glass-border);
  color: var(--steel-grey);
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.65rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  padding: 0.25rem 0.55rem;
  border-radius: 2px;
  cursor: pointer;
  transition: color 0.15s, background 0.15s;
}

.copy-btn:hover {
  color: var(--amber-led);
  background: rgba(74, 74, 94, 0.8);
}

/* highlight.js custom token colors */
.hljs                { background: var(--deep-terminal) !important; color: var(--ghost-white) !important; }
.hljs-keyword        { color: var(--amber-led) !important; }
.hljs-built_in       { color: var(--accent-magenta) !important; }
.hljs-type           { color: var(--accent-cyan) !important; }
.hljs-string         { color: var(--accent-green) !important; }
.hljs-comment        { color: var(--muted-trace) !important; font-style: italic; }
.hljs-number         { color: var(--ghost-white) !important; }
.hljs-title          { color: var(--ghost-white) !important; }
.hljs-title.function_{ color: var(--ghost-white) !important; }
.hljs-meta           { color: var(--amber-led) !important; }
.hljs-params         { color: var(--ghost-white) !important; }
.hljs-operator       { color: var(--ghost-white) !important; }
.hljs-symbol         { color: var(--accent-cyan) !important; }
.hljs-attr           { color: var(--accent-cyan) !important; }
.hljs-literal        { color: var(--accent-cyan) !important; }
.hljs-variable       { color: var(--ghost-white) !important; }
.hljs-punctuation    { color: var(--ghost-white) !important; }

/* ===========================================================================
   Primary Button
   =========================================================================== */
.btn-primary {
  display: inline-block;
  background: var(--amber-led);
  color: var(--void-black);
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.82rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  padding: 0.75rem 1.5rem;
  border-radius: 2px;
  border: none;
  cursor: pointer;
  transition: background 0.15s;
}

.btn-primary:hover {
  background: var(--amber-glow);
  color: var(--void-black);
}

/* ===========================================================================
   Forms
   =========================================================================== */
.signup-form {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.signup-row {
  display: flex;
  gap: 0.75rem;
  flex-direction: column;
}

@media (min-width: 520px) {
  .signup-row { flex-direction: row; }
  .signup-row input { flex: 1; }
}

.signup-form input[type="email"] {
  padding: 0.75rem 1rem;
  background: rgba(15, 15, 26, 0.8);
  border: 1.5px solid var(--glass-border);
  color: var(--ghost-white);
  border-radius: 2px;
  font-size: 0.95rem;
  font-family: 'Inter', sans-serif;
  transition: border-color 0.15s;
}

.signup-form input[type="email"]:focus {
  outline: none;
  border-color: var(--amber-led);
}

.signup-form input[type="email"]::placeholder {
  color: var(--muted-trace);
}

.form-note {
  font-size: 0.8rem;
  color: var(--muted-trace);
  font-family: 'Inter', sans-serif;
  line-height: 1.5;
}

/* ===========================================================================
   Episode Page
   =========================================================================== */
.episode-number-tag {
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.75rem;
  color: var(--amber-led);
  letter-spacing: 0.14em;
  text-transform: uppercase;
  margin-bottom: 0.75rem;
}

.episode-title-lg {
  font-family: 'JetBrains Mono', monospace;
  font-size: 1.6rem;
  font-weight: 700;
  color: var(--ghost-white);
  letter-spacing: 0.03em;
  text-transform: uppercase;
  line-height: 1.3;
  margin-bottom: 0.75rem;
}

.episode-runtime {
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.75rem;
  color: var(--muted-trace);
  letter-spacing: 0.04em;
  margin-bottom: 0.75rem;
}

.video-embed {
  position: relative;
  padding-bottom: 56.25%;
  height: 0;
  overflow: hidden;
  border: 1.5px solid var(--glass-border);
  border-radius: 4px;
  margin: 2rem 0;
  background: var(--deep-terminal);
}

.video-embed iframe {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
}

.covers-list {
  list-style: none;
  padding: 0;
  margin: 1rem 0 0;
}

.covers-list li {
  padding: 0.375rem 0 0.375rem 1.25rem;
  color: var(--ghost-white);
  font-family: 'Inter', sans-serif;
  font-size: 0.95rem;
  position: relative;
}

.covers-list li::before {
  content: '›';
  position: absolute;
  left: 0;
  color: var(--amber-led);
}

.content-section {
  margin-bottom: 2.5rem;
}

.content-section p {
  color: var(--ghost-white);
  font-size: 0.95rem;
}

.ep-nav {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-top: 3rem;
  padding-top: 2rem;
  border-top: 1px solid var(--glass-border);
  gap: 1rem;
}

.ep-nav a {
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.8rem;
  letter-spacing: 0.05em;
  color: var(--steel-grey);
  transition: color 0.15s;
}

.ep-nav a:hover {
  color: var(--amber-led);
}

.ep-nav .spacer { flex: 1; }

/* ===========================================================================
   Resources Page
   =========================================================================== */
.resource-card {
  margin-bottom: 1.5rem;
}

.resource-label {
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.7rem;
  letter-spacing: 0.12em;
  color: var(--muted-trace);
  text-transform: uppercase;
  margin-bottom: 0.5rem;
}

.resource-title {
  font-family: 'JetBrains Mono', monospace;
  font-size: 1rem;
  font-weight: 700;
  color: var(--ghost-white);
  margin-bottom: 0.5rem;
}

.resource-description {
  font-family: 'Inter', sans-serif;
  font-size: 0.9rem;
  color: var(--steel-grey);
  margin-bottom: 1rem;
  line-height: 1.5;
}

/* ===========================================================================
   Page Header (used on episode index, resources, about)
   =========================================================================== */
.page-header {
  margin-bottom: 3rem;
  padding-bottom: 1.5rem;
  border-bottom: 1px solid var(--glass-border);
}

.page-title {
  font-family: 'JetBrains Mono', monospace;
  font-size: 1.5rem;
  font-weight: 800;
  color: var(--amber-led);
  letter-spacing: 0.1em;
  text-transform: uppercase;
}

/* ===========================================================================
   About Page
   =========================================================================== */
.about-section {
  margin-bottom: 2.5rem;
}

.about-section h2 {
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.75rem;
  font-weight: 700;
  color: var(--amber-led);
  letter-spacing: 0.14em;
  text-transform: uppercase;
  margin-bottom: 1rem;
}

.about-section p {
  color: var(--ghost-white);
  font-size: 0.95rem;
  margin-bottom: 0.75rem;
}

.about-links {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.about-links a {
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.85rem;
  letter-spacing: 0.04em;
}

/* ===========================================================================
   Episode list gap
   =========================================================================== */
.episode-list {
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
}

/* ===========================================================================
   Responsive
   =========================================================================== */
@media (max-width: 768px) {
  .hero-logo  { font-size: 4rem; }
  .hero-brand { font-size: 1.3rem; }
  main        { padding: 2.5rem 1.25rem; }
  .site-header { padding: 1rem 1.25rem; }
  .nav-links  { gap: 1.25rem; }
  .episode-title-lg { font-size: 1.25rem; }
}

@media (max-width: 520px) {
  .hero-logo  { font-size: 3rem; }
  .hero-brand { font-size: 1.1rem; }
  .browse-links { gap: 1.5rem; }
  .nav-inner  { flex-direction: column; align-items: flex-start; gap: 0.75rem; }
  .nav-links  { gap: 1rem; }
  .ep-nav     { flex-direction: column; align-items: flex-start; }
}

@media (max-width: 375px) {
  .hero-logo  { font-size: 2.5rem; }
  .hero       { padding: 3rem 0 2.5rem; }
  main        { padding: 2rem 1rem; }
}