/* ============================================================
   ByteRef — style.css
   Aesthetic: Dense terminal ledger / technical reference book
   Dark charcoal + amber accent. IBM Plex Mono + Epilogue.
   ============================================================ */

:root {
  /* Palette */
  --bg:          #111318;
  --bg-2:        #16191f;
  --bg-3:        #1c2028;
  --bg-4:        #222736;
  --line:        #252b38;
  --line-2:      #1d2230;

  --amber:       #f0a500;
  --amber-dim:   rgba(240,165,0,0.10);
  --amber-glow:  rgba(240,165,0,0.22);

  --green:       #3dd68c;
  --green-dim:   rgba(61,214,140,0.09);

  --red:         #f05656;
  --red-dim:     rgba(240,86,86,0.09);
  --red-line:    rgba(240,86,86,0.22);

  --text:        #dde3ee;
  --text-2:      #8b95ab;
  --text-3:      #4e5872;
  --code-color:  #7dd3fc;
  --desc-color:  #9ba8c0;

  /* Layout */
  --sidebar-w:   230px;
  --topbar-h:    52px;
  --r:           8px;
  --r-sm:        4px;

  /* Fonts */
  --mono: 'IBM Plex Mono', 'Courier New', monospace;
  --sans: 'Epilogue', system-ui, sans-serif;

  --t: 0.15s ease;
}

/* ── Reset ── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }

body {
  background: var(--bg);
  color: var(--text);
  font-family: var(--sans);
  font-size: 13px;
  line-height: 1.5;
}

::-webkit-scrollbar { width: 5px; }
::-webkit-scrollbar-track { background: var(--bg); }
::-webkit-scrollbar-thumb { background: #2e3547; border-radius: 3px; }

/* ════════════════════════════
   SIDEBAR
════════════════════════════ */
.sidebar {
  position: fixed;
  top: 0; left: 0;
  width: var(--sidebar-w);
  height: 100vh;
  background: var(--bg-2);
  border-right: 1px solid var(--line);
  display: flex;
  flex-direction: column;
  z-index: 200;
  transition: transform var(--t);
}

/* Brand */
.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 18px 16px 14px;
  border-bottom: 1px solid var(--line);
}

.brand-mark {
  width: 32px; height: 32px;
  border-radius: 6px;
  background: var(--amber);
  color: #111318;
  font-family: var(--mono);
  font-size: 12px;
  font-weight: 600;
  display: grid;
  place-items: center;
  flex-shrink: 0;
  letter-spacing: 0.03em;
}

.brand-name {
  font-size: 15px;
  font-weight: 900;
  color: var(--text);
  letter-spacing: -0.01em;
}

.brand-tagline {
  font-size: 10px;
  color: var(--text-3);
  font-family: var(--mono);
  letter-spacing: 0.06em;
}

/* Search Box */
.search-box {
  display: flex;
  align-items: center;
  gap: 8px;
  margin: 12px 12px 8px;
  background: var(--bg-3);
  border: 1px solid var(--line);
  border-radius: var(--r-sm);
  padding: 7px 10px;
  transition: border-color var(--t), box-shadow var(--t);
}

.search-box:focus-within {
  border-color: var(--amber);
  box-shadow: 0 0 0 3px var(--amber-dim);
}

.search-ico {
  width: 13px; height: 13px;
  color: var(--text-3);
  flex-shrink: 0;
}

.search-box input {
  flex: 1;
  background: none;
  border: none;
  outline: none;
  color: var(--text);
  font-family: var(--mono);
  font-size: 11.5px;
  min-width: 0;
}

.search-box input::placeholder { color: var(--text-3); }

.search-clear {
  background: none;
  border: none;
  color: var(--text-3);
  cursor: pointer;
  font-size: 11px;
  padding: 1px 3px;
  flex-shrink: 0;
}

.search-clear:hover { color: var(--text); }

/* Nav */
.nav {
  flex: 1;
  overflow-y: auto;
  padding: 4px 8px 8px;
}

.nav-group-label {
  display: block;
  font-size: 10px;
  font-family: var(--mono);
  color: var(--text-3);
  letter-spacing: 0.12em;
  text-transform: uppercase;
  padding: 10px 8px 5px;
}

.nav-link {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 7px 8px;
  border-radius: var(--r-sm);
  color: var(--text-2);
  text-decoration: none;
  font-size: 12.5px;
  font-weight: 500;
  transition: background var(--t), color var(--t), transform var(--t);
  margin-bottom: 1px;
  position: relative;
  overflow: hidden;
}

.nav-link:hover {
  background: var(--bg-3);
  color: var(--text);
  transform: translateX(4px);
}

.nav-link.active {
  background: var(--amber-dim);
  color: var(--amber);
}

.nav-link.active .dot {
  background: var(--amber);
}

.nav-link .dot {
  width: 5px; height: 5px;
  border-radius: 50%;
  background: var(--text-3);
  flex-shrink: 0;
  transition: background var(--t);
}

/* Logos para tecnologias */
.nav-link[data-s="gcp"]::before {
  content: "☁️";
  font-size: 14px;
  margin-right: 4px;
}

.nav-link[data-s="kubernetes"]::before {
  content: "🚢";
  font-size: 14px;
  margin-right: 4px;
}

.nav-link[data-s="docker"]::before {
  content: "🐳";
  font-size: 14px;
  margin-right: 4px;
}

.nav-link[data-s="bash"]::before {
  content: "💻";
  font-size: 14px;
  margin-right: 4px;
}

.nav-link[data-s="flask"]::before {
  content: "🌶️";
  font-size: 14px;
  margin-right: 4px;
}

.nav-link[data-s="postgresql"]::before {
  content: "🐘";
  font-size: 14px;
  margin-right: 4px;
}

.nav-link[data-s="mysql"]::before {
  content: "🐬";
  font-size: 14px;
  margin-right: 4px;
}

.nav-link[data-s="redis"]::before {
  content: "⚡";
  font-size: 14px;
  margin-right: 4px;
}

.nav-link[data-s="poetry"]::before {
  content: "📦";
  font-size: 14px;
  margin-right: 4px;
}

.nav-link[data-s="pandas"]::before {
  content: "🐼";
  font-size: 14px;
  margin-right: 4px;
}

.nav-link[data-s="git"]::before {
  content: "🐙";
  font-size: 14px;
  margin-right: 4px;
}

/* Animação na rolagem */
.nav-link::after {
  content: "";
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: linear-gradient(90deg, transparent, var(--amber-glow), transparent);
  transition: left 0.5s;
}

.nav-link:hover::after {
  left: 100%;
}
  font-style: normal;
}

.nav-link:hover { background: var(--bg-4); color: var(--text); }
.nav-link:hover .dot { background: var(--amber); }

.nav-link.active {
  background: var(--amber-dim);
  color: var(--amber);
  font-weight: 700;
}

.nav-link.active .dot { background: var(--amber); }

/* Sidebar meta */
.sidebar-meta {
  padding: 12px 16px;
  border-top: 1px solid var(--line);
}

.kbd-hint {
  font-family: var(--mono);
  font-size: 10px;
  color: var(--text-3);
}

kbd {
  background: var(--bg-4);
  border: 1px solid var(--line);
  border-radius: 3px;
  padding: 1px 5px;
  font-family: var(--mono);
  font-size: 10px;
}

/* ════════════════════════════
   LAYOUT SHELL
════════════════════════════ */
.app-shell {
  display: flex;
}

.main-wrap {
  margin-left: var(--sidebar-w);
  flex: 1;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

/* ════════════════════════════
   TOPBAR
════════════════════════════ */
.topbar {
  position: sticky;
  top: 0;
  z-index: 100;
  height: var(--topbar-h);
  background: rgba(17,19,24,0.94);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--line);
  display: flex;
  align-items: center;
  padding: 0 20px;
  gap: 12px;
}

.hamburger {
  display: none;
  flex-direction: column;
  gap: 4px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 4px;
}

.hamburger span {
  width: 18px; height: 1.5px;
  background: var(--text-2);
  border-radius: 2px;
  display: block;
}

.topbar-brand {
  font-size: 13px;
  font-weight: 900;
  color: var(--amber);
  font-family: var(--mono);
  letter-spacing: 0.04em;
}

.result-badge {
  font-family: var(--mono);
  font-size: 11px;
  color: var(--amber);
  background: var(--amber-dim);
  border: 1px solid var(--amber-glow);
  border-radius: 20px;
  padding: 2px 10px;
}

.topbar-right {
  margin-left: auto;
  display: flex;
  align-items: center;
  gap: 10px;
}

.chip {
  font-family: var(--mono);
  font-size: 10.5px;
  color: var(--text-3);
  background: var(--bg-3);
  border: 1px solid var(--line);
  border-radius: 20px;
  padding: 2px 10px;
}

.theme-toggle {
  background: var(--bg-3);
  border: 1px solid var(--line);
  color: var(--text-2);
  border-radius: var(--r-sm);
  cursor: pointer;
  font-size: 13px;
  padding: 4px 8px;
  transition: background var(--t), color var(--t);
}

.theme-toggle:hover {
  background: var(--bg-4);
  color: var(--amber);
}

.nav-home {
  background: var(--amber-dim);
  border: 1px solid var(--amber-glow);
  color: var(--amber);
  border-radius: var(--r-sm);
  cursor: pointer;
  font-size: 13px;
  padding: 4px 8px;
  text-decoration: none;
  transition: background var(--t), color var(--t);
  font-weight: 500;
}

.nav-home:hover {
  background: var(--amber);
  color: var(--bg-1);
  border-color: var(--amber);
}

/* ════════════════════════════
   CONTENT
════════════════════════════ */
.content {
  flex: 1;
  padding: 24px 24px 48px;
}

/* ════════════════════════════
   TECH SECTION
════════════════════════════ */
.tech-section {
  margin-bottom: 20px;
  border: 1px solid var(--line);
  border-radius: var(--r);
  overflow: hidden;
  background: var(--bg-2);
  animation: fadeSlide 0.28s ease both;
}

.tech-section.sr-hidden { display: none; }

.tech-section:nth-child(1)  { animation-delay: 0.02s; }
.tech-section:nth-child(2)  { animation-delay: 0.05s; }
.tech-section:nth-child(3)  { animation-delay: 0.08s; }
.tech-section:nth-child(4)  { animation-delay: 0.11s; }
.tech-section:nth-child(5)  { animation-delay: 0.14s; }
.tech-section:nth-child(6)  { animation-delay: 0.17s; }
.tech-section:nth-child(7)  { animation-delay: 0.20s; }
.tech-section:nth-child(8)  { animation-delay: 0.23s; }
.tech-section:nth-child(9)  { animation-delay: 0.26s; }
.tech-section:nth-child(10) { animation-delay: 0.29s; }

@keyframes fadeSlide {
  from { opacity: 0; transform: translateY(10px); }
  to   { opacity: 1; transform: translateY(0); }
}

/* Section head */
.section-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 13px 18px;
  background: var(--bg-3);
  border-bottom: 1px solid var(--line);
  cursor: pointer;
  user-select: none;
  transition: background var(--t);
  gap: 12px;
}

.section-head:hover { background: var(--bg-4); }

.sh-left {
  display: flex;
  align-items: center;
  gap: 10px;
}

.tech-icon { font-size: 18px; line-height: 1; }

.section-head h2 {
  font-size: 14px;
  font-weight: 700;
  color: var(--text);
  letter-spacing: -0.01em;
}

.section-head h2 em {
  font-weight: 400;
  font-style: normal;
  font-size: 12px;
  color: var(--text-2);
  margin-left: 8px;
}

.sh-right {
  display: flex;
  align-items: center;
  gap: 6px;
  flex-wrap: wrap;
}

.tag {
  font-family: var(--mono);
  font-size: 10px;
  color: var(--text-3);
  background: var(--bg);
  border: 1px solid var(--line);
  border-radius: 3px;
  padding: 2px 6px;
}

.collapse-btn {
  background: none;
  border: none;
  color: var(--text-3);
  cursor: pointer;
  font-size: 16px;
  padding: 2px 4px;
  line-height: 1;
  transition: transform var(--t), color var(--t);
  margin-left: 4px;
}

.section-head.is-collapsed .collapse-btn { transform: rotate(-90deg); }
.section-head:hover .collapse-btn { color: var(--amber); }

/* Section body */
.section-body {
  padding: 16px;
}

.section-body.is-collapsed { display: none; }

/* ════════════════════════════
   REF GRID
════════════════════════════ */
.ref-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(420px, 1fr));
  gap: 12px;
}

.ref-block {
  background: var(--bg);
  border: 1px solid var(--line-2);
  border-radius: var(--r-sm);
  overflow: hidden;
}

.ref-block--wide {
  grid-column: 1 / -1;
}

.ref-block-title {
  font-size: 11px;
  font-family: var(--mono);
  font-weight: 600;
  color: var(--amber);
  letter-spacing: 0.06em;
  padding: 8px 12px 7px;
  background: var(--bg-2);
  border-bottom: 1px solid var(--line-2);
}

/* ════════════════════════════
   COMMAND TABLE
════════════════════════════ */
.cmd-table {
  width: 100%;
  border-collapse: collapse;
  table-layout: fixed;
}

.cmd-table tr {
  border-bottom: 1px solid var(--line-2);
  transition: background var(--t);
}

.cmd-table tr:last-child { border-bottom: none; }

.cmd-table tr:hover { background: var(--bg-3); }

/* Description column */
td.desc {
  width: 34%;
  padding: 7px 8px 7px 12px;
  font-size: 11.5px;
  color: var(--desc-color);
  vertical-align: middle;
  line-height: 1.4;
}

/* Code column */
td.code {
  padding: 5px 8px 5px 6px;
  vertical-align: middle;
  display: flex;
  align-items: center;
  gap: 6px;
  min-width: 0;
}

td.code code {
  flex: 1;
  font-family: var(--mono);
  font-size: 11.5px;
  color: var(--code-color);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  display: block;
  line-height: 1.6;
}

/* Copy button */
.cp {
  flex-shrink: 0;
  background: var(--bg-3);
  border: 1px solid var(--line);
  border-radius: 4px;
  color: var(--text-1);
  cursor: pointer;
  font-size: 11px;
  padding: 4px 6px;
  transition: all var(--t);
  font-family: var(--mono);
  line-height: 1;
  min-width: 30px;
}

.cp:hover,
.cp:focus {
  background: var(--amber-dim);
  border-color: var(--amber-glow);
  color: var(--amber);
  outline: none;
}

.cp.copied {
  background: var(--green-dim);
  border-color: rgba(61,214,140,0.3);
  color: var(--green);
}

.cp:active {
  transform: translateY(1px);
}

/* ════════════════════════════
   ERROR TABLE
════════════════════════════ */
.err-table { background: var(--red-dim); }

.err-table tr:hover { background: rgba(240,86,86,0.05); }

td.err-label {
  width: 28%;
  padding: 7px 8px 7px 12px;
  font-family: var(--mono);
  font-size: 11px;
  color: var(--red);
  font-weight: 600;
  vertical-align: top;
  line-height: 1.5;
  border-right: 1px solid var(--red-line);
}

td.err-fix {
  padding: 7px 12px;
  font-size: 12px;
  color: var(--text-2);
  line-height: 1.55;
  vertical-align: top;
}

td.err-fix code {
  font-family: var(--mono);
  font-size: 11px;
  background: rgba(0,0,0,0.3);
  border: 1px solid var(--line);
  border-radius: 3px;
  padding: 0 5px;
  color: var(--code-color);
}

/* ════════════════════════════
   HIGHLIGHT (search)
════════════════════════════ */
mark.hl {
  background: rgba(240,165,0,0.25);
  color: var(--amber);
  border-radius: 2px;
  padding: 0 1px;
}

/* ════════════════════════════
   TOAST
════════════════════════════ */
.toast {
  position: fixed;
  bottom: 24px;
  right: 24px;
  background: var(--bg-4);
  border: 1px solid var(--amber-glow);
  color: var(--amber);
  font-family: var(--mono);
  font-size: 12px;
  font-weight: 600;
  padding: 9px 18px;
  border-radius: 6px;
  box-shadow: 0 4px 20px rgba(0,0,0,0.4);
  opacity: 0;
  transform: translateY(10px) scale(0.97);
  transition: opacity 0.18s, transform 0.18s;
  pointer-events: none;
  z-index: 999;
}

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

/* ════════════════════════════
   FOOTER
════════════════════════════ */
.footer {
  border-top: 1px solid var(--line);
  padding: 14px 24px;
  display: flex;
  align-items: center;
  gap: 16px;
  font-family: var(--mono);
  font-size: 11px;
  color: var(--text-3);
}

.footer-brand {
  color: var(--amber);
  font-weight: 600;
}

.footer-count {
  margin-left: auto;
}

/* ════════════════════════════
   OVERLAY
════════════════════════════ */
.overlay {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.6);
  z-index: 150;
  backdrop-filter: blur(2px);
}

.overlay.show { display: block; }

/* ════════════════════════════
   LIGHT THEME
════════════════════════════ */
body.light {
  --bg:        #f0f2f5;
  --bg-2:      #e8eaef;
  --bg-3:      #dde0e8;
  --bg-4:      #d0d4de;
  --line:      #c8ccd8;
  --line-2:    #d4d8e2;
  --text:      #1a1d2e;
  --text-2:    #4a5068;
  --text-3:    #8590a8;
  --code-color:#1a5fa8;
  --desc-color:#4a5068;
  --red-dim:   rgba(220,50,50,0.05);
  --red-line:  rgba(220,50,50,0.18);
  --red:       #cc2222;
  --amber-dim: rgba(200,130,0,0.10);
  --amber-glow:rgba(200,130,0,0.22);
  --amber:     #b87200;
  --green-dim: rgba(20,160,80,0.09);
}

body.light .cmd-table tr:hover { background: #dde0e8; }
body.light .err-table { background: rgba(220,50,50,0.04); }
body.light .err-table tr:hover { background: rgba(220,50,50,0.03); }
body.light td.err-fix code { background: rgba(0,0,0,0.05); }

/* ════════════════════════════
   RESPONSIVE
════════════════════════════ */
@media (max-width: 920px) {
  .sidebar {
    transform: translateX(-100%);
    z-index: 300;
  }

  .sidebar.open {
    transform: translateX(0);
    box-shadow: 4px 0 30px rgba(0,0,0,0.5);
  }

  .main-wrap { margin-left: 0; }

  .hamburger { display: flex; }

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

  .ref-block--wide { grid-column: auto; }

  td.desc { width: 36%; }

  .section-head h2 em { display: none; }
  .sh-right .tag { display: none; }
}

@media (max-width: 560px) {
  .content { padding: 14px 12px 40px; }
  .topbar { padding: 0 14px; }
  .chip { display: none; }
  td.desc { font-size: 11px; }
  td.code code { font-size: 10.5px; }
}

/* ── Welcome Page ── */
.welcome-section {
  text-align: center;
  padding: 60px 20px 80px;
  max-width: 1200px;
  margin: 0 auto;
}

.welcome-content h1 {
  font-family: var(--sans);
  font-size: 3.5rem;
  font-weight: 900;
  color: var(--amber);
  margin-bottom: 16px;
  text-shadow: 0 0 20px var(--amber-glow);
}

.welcome-subtitle {
  font-family: var(--sans);
  font-size: 1.25rem;
  font-weight: 500;
  color: var(--text);
  margin-bottom: 24px;
  opacity: 0.9;
}

.welcome-desc {
  font-family: var(--sans);
  font-size: 1.1rem;
  color: var(--text-2);
  margin-bottom: 60px;
  max-width: 600px;
  margin-left: auto;
  margin-right: auto;
  line-height: 1.6;
}

.tech-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 24px;
  max-width: 1000px;
  margin: 0 auto;
}

.tech-card {
  display: block;
  background: var(--bg-2);
  border: 1px solid var(--line);
  border-radius: var(--r);
  padding: 32px 24px;
  text-decoration: none;
  transition: all var(--t);
  position: relative;
  overflow: hidden;
}

.tech-card:hover {
  border-color: var(--amber);
  background: var(--bg-3);
  transform: translateY(-4px);
  box-shadow: 0 8px 24px var(--amber-dim);
}

.tech-card-icon {
  font-size: 2.5rem;
  margin-bottom: 16px;
  display: block;
}

.tech-card-title {
  font-family: var(--sans);
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--text);
  margin-bottom: 8px;
}

.tech-card-desc {
  font-family: var(--sans);
  font-size: 0.95rem;
  color: var(--text-2);
  font-weight: 400;
}

/* Mobile adjustments */
@media (max-width: 768px) {
  .welcome-section {
    padding: 40px 20px 60px;
  }
  
  .welcome-content h1 {
    font-size: 2.5rem;
  }
  
  .welcome-subtitle {
    font-size: 1.1rem;
  }
  
  .welcome-desc {
    font-size: 1rem;
    margin-bottom: 40px;
  }
  
  .tech-grid {
    grid-template-columns: 1fr;
    gap: 16px;
  }
  
  .tech-card {
    padding: 24px 20px;
  }
  
  .tech-card-icon {
    font-size: 2rem;
  }
  
  .tech-card-title {
    font-size: 1.25rem;
  }
}