/* ==========================================================================
   DigitMind — design system
   Developer dark theme — high contrast, IDE-inspired (VS Code / GitHub Dark):
     --bg-page      #0d1117  page background (near-black slate)
     --bg-block     #161b22  blocks, panels, cards
     --bg-elevated  #1c2330  elevated surfaces (header, dropdowns)
     --bg-hover     #21304a  hover highlight
     --border       #30363d  subtle borders
     --text         #e6edf3  body text
     --muted        #9da7b3  secondary text
     --link         #58a6ff  links (VS Code blue)
     --accent       #2f81f7  primary accent (vivid blue)
     --accent-2     #2ea043  success/green
     --deep         #1c2330  deep surface
     --illumination #52F168  illumination
   ========================================================================== */

:root {
  --bg-page: #0d1117;
  --bg-block: #161b22;
  --bg-elevated: #1c2330;
  --bg-hover: #21304a;
  --border: #30363d;
  --text: #e6edf3;
  --link: #58a6ff;
  --muted: #9da7b3;
  --accent: #2f81f7;
  --accent-hover: #4c95ff;
  --accent-2: #2ea043;
  --accent-2-hover: #3fb950;
  --deep: #1c2330;
  --illumination: #52F168;

  /* On dark blocks the readable text is the light body colour */
  --text-on-block: #e6edf3;
  --radius: 10px;
  --radius-sm: 6px;
  --shadow: 0 2px 8px rgba(0, 0, 0, 0.4);
  --shadow-lg: 0 8px 28px rgba(0, 0, 0, 0.55);
  --maxw: 1180px;
  --font: "Arsenal", sans-serif;
  --mono: "JetBrains Mono", "Fira Code", "Cascadia Code", Consolas, monospace;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  font-family: var(--font);
  background: var(--bg-page);
  color: var(--text);
  line-height: 1.6;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

a { color: var(--link); text-decoration: none; transition: color 0.15s; }
a:hover { color: #79b8ff; text-decoration: none; }

h1, h2, h3, h4 { color: var(--text); line-height: 1.25; margin-top: 0; }

img { max-width: 100%; height: auto; }

.container {
  width: 100%;
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 0 20px;
}

/* ---------- Header / navigation ---------- */
.site-header {
  background: var(--deep);
  box-shadow: var(--shadow);
  position: sticky;
  top: 0;
  z-index: 50;
}
.site-header .container {
  display: flex;
  align-items: center;
  gap: 20px;
  min-height: 64px;
}
.brand { display: flex; align-items: center; gap: 12px; }
.brand img { height: 40px; width: auto; display: block; }
.brand .brand-name {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--text);
  letter-spacing: 0.5px;
}
.brand:hover { text-decoration: none; }

.nav-toggle {
  display: none;
  margin-left: auto;
  background: var(--bg-block);
  color: var(--text);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 8px 12px;
  font-size: 1.1rem;
  cursor: pointer;
}

.main-nav { margin-left: auto; }
.main-nav ul {
  display: flex;
  gap: 6px;
  list-style: none;
  margin: 0;
  padding: 0;
  align-items: center;
  flex-wrap: wrap;
}
.main-nav a {
  display: block;
  padding: 8px 14px;
  border-radius: var(--radius-sm);
  color: var(--text);
  font-weight: 500;
}
.main-nav a:hover {
  background: var(--bg-hover);
  color: var(--text);
  text-decoration: none;
}
.main-nav a.active { background: var(--accent); color: #ffffff; }
.main-nav a.nav-donate { color: var(--illumination); }
.main-nav a.nav-outline { border: 1px solid var(--border); }

/* ---------- Dropdown menus ---------- */
.main-nav .has-dropdown { position: relative; }
.main-nav .dropdown-toggle .caret {
  display: inline-block;
  font-size: 1em;
  margin-left: 0;
  transition: transform 0.15s;
}
.main-nav .dropdown-menu {
  display: none;
  position: absolute;
  top: 100%;
  left: 0;
  min-width: 180px;
  margin: 0;
  padding: 6px;
  list-style: none;
  background: var(--deep);
  border-radius: var(--radius-sm);
  box-shadow: var(--shadow-lg);
  z-index: 60;
}
.main-nav .dropdown-menu li { width: 100%; }
.main-nav .dropdown-menu a { display: block; white-space: nowrap; }
.main-nav .has-dropdown:hover .dropdown-menu,
.main-nav .has-dropdown.open .dropdown-menu { display: block; }
.main-nav .has-dropdown:hover .dropdown-toggle .caret,
.main-nav .has-dropdown.open .dropdown-toggle .caret { transform: rotate(180deg); }

.nav-user .dropdown-menu a { display: flex; align-items: center; gap: 8px; }
.nav-user .avatar-mini {
  width: 30px; height: 30px; border-radius: 50%;
  background: var(--accent); color: #ffffff;
  display: inline-flex; align-items: center; justify-content: center;
  font-weight: 700; font-size: 0.85rem; overflow: hidden;
  flex-shrink: 0;
}
.nav-user .avatar-mini img { width: 100%; height: 100%; object-fit: cover; }
.main-nav .nav-logout {
  display: block; width: 100%; text-align: left;
  background: none; border: 0; cursor: pointer;
  padding: 8px 14px; border-radius: var(--radius-sm);
  color: var(--text); font: inherit; font-weight: 500;
}
.main-nav .nav-logout:hover { background: var(--bg-hover); }

/* ---------- Buttons ---------- */
.btn {
  display: inline-block;
  background: var(--accent);
  color: #ffffff;
  border: 1px solid var(--accent);
  border-radius: var(--radius-sm);
  padding: 10px 18px;
  font-size: 0.95rem;
  font-weight: 600;
  cursor: pointer;
  transition: background 0.15s, border-color 0.15s, transform 0.05s;
  text-decoration: none;
  line-height: 1.2;
}
.btn:hover {
  background: var(--accent-hover);
  border-color: var(--accent-hover);
  color: #ffffff;
  text-decoration: none;
}
.btn:active { transform: translateY(1px); }
.btn-accent { background: var(--accent-2); border-color: var(--accent-2); }
.btn-accent:hover { background: var(--accent-2-hover); border-color: var(--accent-2-hover); }
.btn-outline {
  background: transparent;
  border: 1px solid var(--border);
  color: var(--text);
}
.btn-outline:hover { background: var(--bg-hover); border-color: var(--accent); color: var(--text); }
.btn-sm { padding: 6px 12px; font-size: 0.85rem; }
.btn-block { display: block; width: 100%; text-align: center; }

/* Compact icon-only copy button (used inside result rows) */
.btn-copy-icon {
  flex-shrink: 0;
  display: inline-flex; align-items: center; justify-content: center;
  width: 34px; height: 34px; padding: 0;
  background: transparent; color: var(--muted);
  border: 1px solid var(--border); border-radius: var(--radius-sm);
  cursor: pointer; transition: background 0.15s, border-color 0.15s, color 0.15s;
}
.btn-copy-icon:hover { background: var(--bg-hover); border-color: var(--accent); color: var(--text); }
.btn-copy-icon:active { transform: translateY(1px); }
.btn-copy-icon.copied { color: var(--accent); border-color: var(--accent); }

/* ---------- Panels / cards ---------- */
.panel {
  background: var(--bg-block);
  color: var(--text-on-block);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 22px;
  box-shadow: var(--shadow);
}
.panel h1, .panel h2, .panel h3, .panel h4 {
  color: var(--text-on-block);
  margin: 0;
}
.panel h1.page-title {
  margin-bottom: 20px;
}
.panel a:not(.btn) { color: var(--link); }
.panel a:not(.btn):hover { color: #79b8ff; }

.panel hr {
  margin: 30px 0;
}

/* Password generator */
.panel .tools-form {
  gap: 30px;
  align-items: center;
}
.panel .tools-form .tools-input-wrapper {
  display: flex;
  align-items: baseline;
  gap: 10px;
}
.panel .tools-form .tools-input-wrapper input {
  padding: 4px 6px;
  width: 120px;
}
.panel .tools-form label,
.panel .tools-form input {
  margin: 0;
}

.card {
  background: var(--bg-block);
  color: var(--text-on-block);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 18px;
  box-shadow: var(--shadow);
  transition: transform 0.15s, box-shadow 0.15s, border-color 0.15s;
  display: flex;
  flex-direction: column;
}
.card:hover { transform: translateY(-3px); box-shadow: var(--shadow-lg); border-color: var(--accent); }
.card h3 { color: var(--text-on-block); margin: 0 0 8px; }
.card p { color: var(--muted); margin: 0 0 12px; }
.card .card-icon { font-size: 2rem; margin-bottom: 8px; }
.card .card-meta { font-size: 0.82rem; color: var(--muted); margin-top: auto; }

.grid { display: grid; gap: 18px; }
.grid-2 { grid-template-columns: repeat(2, 1fr); }
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.grid-4 { grid-template-columns: repeat(4, 1fr); }

/* ---------- Main layout ---------- */
main { flex: 1 0 auto; padding: 32px 0; }
.page-title { margin-bottom: 8px; font-size: 2rem; }
.page-lead { color: var(--muted); margin-top: 0; margin-bottom: 28px; }
.section-head {
  display: flex; align-items: center; justify-content: space-between;
  margin-bottom: 16px; gap: 12px; flex-wrap: wrap;
}
.section-head h2 { margin: 0; }

.breadcrumbs { font-size: 0.85rem; margin-bottom: 18px; color: var(--muted); }
.breadcrumbs a { color: var(--link); }

/* ---------- Hero ---------- */
.hero {
  background: linear-gradient(135deg, #10233f 0%, var(--bg-block) 55%, #10233f 100%);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 56px 40px;
  box-shadow: var(--shadow-lg);
  margin-bottom: 36px;
  text-align: center;
}
.hero h1 { font-size: 2.6rem; margin-bottom: 16px; }
.hero p { font-size: 1.15rem; color: var(--muted); max-width: 720px; margin: 0 auto 26px; }
.hero .hero-actions { display: flex; gap: 14px; justify-content: center; flex-wrap: wrap; }

/* ---------- Forms ---------- */
.form-row { margin-bottom: 16px; }
.form-row label { display: block; font-weight: 600; margin-bottom: 6px; }
input[type="text"], input[type="email"], input[type="password"],
input[type="url"], input[type="number"], input[type="search"],
textarea, select {
  width: 100%;
  padding: 10px 12px;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  background: var(--bg-page);
  color: var(--text);
  font-family: inherit;
  font-size: 0.95rem;
}
input::placeholder, textarea::placeholder { color: var(--muted); }
textarea { resize: vertical; }
input:focus, textarea:focus, select:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(47, 129, 247, 0.35);
  background: var(--bg-block);
}
.form-row .helptext { font-size: 0.8rem; color: var(--muted); display: block; margin-top: 4px; }
.form-row.checkbox { display: flex; align-items: center; gap: 8px; }
.form-row.checkbox label { margin: 0; }
.form-row.checkbox input { width: auto; }
.errorlist {
  list-style: none; margin: 6px 0 0; padding: 0;
  color: #ff7b72; font-size: 0.85rem;
}
.code-input, textarea.code-input { font-family: var(--mono); font-size: 0.9rem; }

/* ---------- Messages ---------- */
.messages { list-style: none; padding: 0; margin-top: 20px; }
.messages li {
  padding: 12px 16px; border-radius: var(--radius-sm);
  margin-top: 10px;
  font-weight: 500;
  box-shadow: var(--shadow); color: var(--text);
  border: 1px solid transparent;
}
.messages li.success { background: rgba(46, 160, 67, 0.15); border-color: var(--accent-2); }
.messages li.info { background: rgba(47, 129, 247, 0.15); border-color: var(--accent); }
.messages li.warning { background: rgba(210, 153, 34, 0.15); border-color: #d29922; }
.messages li.danger, .messages li.error { background: rgba(248, 81, 73, 0.15); border-color: #f85149; }

/* ---------- Tables / lists ---------- */
.list-rows { display: flex; flex-direction: column; gap: 10px; }
.row-item {
  background: var(--bg-block); color: var(--text-on-block);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm); padding: 14px 16px;
  display: flex; justify-content: space-between; gap: 14px; align-items: center;
  box-shadow: var(--shadow); transition: background 0.15s, border-color 0.15s;
}
.row-item:hover { background: var(--bg-hover); border-color: var(--accent); }
.row-item .row-main { min-width: 0; }
.row-item .row-title { font-weight: 600; color: var(--text-on-block); }
.row-item .row-title a { color: var(--link); }
.row-item .row-sub { font-size: 0.82rem; color: var(--muted); }
.row-item .row-stat { text-align: center; font-size: 0.8rem; color: var(--muted); white-space: nowrap; }

.badge {
  display: inline-block;
  padding: 2px 8px;
  border-radius: 20px;
  font-size: 0.72rem;
  font-weight: 700;
  background: var(--accent);
  color: #ffffff;
  vertical-align: middle;
  margin-bottom: 14px;
}
.badge.deep { background: var(--bg-hover); color: var(--text); }
.badge.muted { background: var(--border); color: var(--text); }

.article-preview-body .badge {
  margin-bottom: 20px;
}

/* ---------- Code blocks ---------- */
pre, code { font-family: var(--mono); }
:not(pre) > code {
  background: var(--bg-page); color: #79c0ff;
  padding: 2px 6px; border-radius: 4px; font-size: 0.9em;
  border: 1px solid var(--border);
}
pre {
  background: #010409; color: #e6edf3;
  padding: 16px; border-radius: var(--radius-sm);
  border: 1px solid var(--border);
  overflow-x: auto; font-size: 0.88rem; line-height: 1.5;
}
/* highlight.js gives `code.hljs` its own padding and background; the wrapping
   <pre> already provides both, so keep the block's geometry unchanged and let
   the theme contribute only the token colours. */
pre code.hljs {
  padding: 0; background: transparent;
  font-size: inherit; line-height: inherit;
}
.result-block {
  background: #010409; color: var(--text);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm); padding: 14px;
  font-family: var(--mono); font-size: 0.9rem;
  white-space: pre-wrap; word-break: break-word; overflow-x: auto;
}

/* ---------- Content (articles) ---------- */
.content-body { color: var(--text-on-block); }
.content-body p { margin: 0 0 14px; }
.content-body h2, .content-body h3 { color: var(--text-on-block); margin-top: 22px; }
.content-body a { color: var(--link); text-decoration: none; }
.content-body a:hover { text-decoration: underline; }
.content-body img { border-radius: var(--radius-sm); }
.content-body pre { color: var(--text); }

/* ---------- Chat ---------- */
.chat-layout { display: grid; grid-template-columns: 220px 1fr; gap: 18px; }
.chat-rooms { display: flex; flex-direction: column; gap: 6px; }
.chat-rooms a {
  padding: 10px 12px; border-radius: var(--radius-sm);
  background: var(--bg-block); color: var(--text-on-block); font-weight: 500;
  border: 1px solid var(--border);
}
.chat-rooms a:hover, .chat-rooms a.active { background: var(--bg-hover); border-color: var(--accent); text-decoration: none; }
.chat-window {
  background: var(--bg-block); border-radius: var(--radius);
  border: 1px solid var(--border);
  box-shadow: var(--shadow); display: flex; flex-direction: column;
  height: 60vh; min-height: 380px;
}
.chat-messages {
  flex: 1; overflow-y: auto; padding: 16px; display: flex; flex-direction: column; gap: 10px;
}
.chat-msg { max-width: 80%; }
.chat-msg .chat-meta { font-size: 0.75rem; color: var(--muted); margin-bottom: 2px; }
.chat-msg .chat-bubble {
  background: var(--bg-hover); color: var(--text);
  padding: 8px 12px; border-radius: var(--radius-sm); display: inline-block;
  word-break: break-word;
}
.chat-msg.mine { align-self: flex-end; text-align: right; }
.chat-msg.mine .chat-bubble { background: var(--accent); color: #ffffff; }
.chat-form {
  display: flex; gap: 8px; padding: 12px; border-top: 1px solid var(--border);
}
.chat-form input { flex: 1; }

/* ---------- Footer ---------- */
.site-footer {
  background: var(--deep);
  padding: 28px 0;
  margin-top: 40px;
  color: var(--muted);
  flex-shrink: 0;
}
.site-footer .footer-grid {
  display: flex; justify-content: space-between; gap: 24px; flex-wrap: wrap;
}
.site-footer a { color: var(--link); }
.site-footer .footer-links { display: flex; gap: 16px; flex-wrap: wrap; }
.site-footer .footer-contacts { margin-top: 22px; }
.site-footer .footer-contacts strong { display: block; color: var(--text); margin-bottom: 8px; }
.site-footer .footer-contacts ul {
  list-style: none; margin: 0; padding: 0;
  display: flex; flex-direction: column; gap: 6px;
}
.site-footer .footer-contacts .contact-label {
  display: inline-block; min-width: 92px; color: var(--muted);
}
.site-footer .footer-bottom {
  margin-top: 18px; padding-top: 14px; border-top: 1px solid var(--border);
  font-size: 0.85rem;
}

/* ---------- Pagination ---------- */
.pagination { display: flex; gap: 6px; justify-content: center; margin-top: 28px; flex-wrap: wrap; }
.pagination a, .pagination span {
  padding: 8px 12px; border-radius: var(--radius-sm);
  background: var(--bg-block); color: var(--text-on-block); font-weight: 600;
  border: 1px solid var(--border);
}
.pagination a:hover { background: var(--bg-hover); border-color: var(--accent); text-decoration: none; }
.pagination .current { background: var(--accent); border-color: var(--accent); color: #ffffff; }

/* ---------- Utility ---------- */
.text-muted { color: var(--muted); }
.text-center { text-align: center; }
.mt-0 { margin-top: 0; } .mb-0 { margin-bottom: 0; }
.mt-2 { margin-top: 16px; } .mb-2 { margin-bottom: 16px; }
.mt-3 { margin-top: 24px; } .mb-3 { margin-bottom: 24px; }
.flex { display: flex; } .gap { gap: 12px; } .wrap { flex-wrap: wrap; }
.items-center { align-items: center; }
.justify-between { justify-content: space-between; }
.empty-state { text-align: center; padding: 40px 20px; color: var(--muted); }

/* ---------- Responsive ---------- */
@media (max-width: 860px) {
  .grid-3, .grid-4 { grid-template-columns: repeat(2, 1fr); }
  .chat-layout { grid-template-columns: 1fr; }
  .chat-rooms { flex-direction: row; overflow-x: auto; }
}
@media (max-width: 1024px) {
  .nav-toggle { display: block; }
  .main-nav {
    display: none; width: 100%; order: 3; margin-left: 0;
  }
  .main-nav.open { display: block; }
  .main-nav ul { flex-direction: column; align-items: stretch; }
  .main-nav .dropdown-menu {
    position: static;
    display: none;
    min-width: 0;
    margin: 4px 0 4px 14px;
    box-shadow: none;
    background: transparent;
    padding: 0;
  }
  .main-nav .has-dropdown.open .dropdown-menu { display: block; }
  .main-nav .has-dropdown:hover .dropdown-menu { display: none; }
  .main-nav .has-dropdown.open .dropdown-menu { display: block; }
  .site-header .container { flex-wrap: wrap; min-height: auto; padding-top: 10px; padding-bottom: 10px; }
}
@media (max-width: 680px) {
  .grid-2, .grid-3, .grid-4 { grid-template-columns: 1fr; }
  .hero { padding: 40px 22px; }
  .hero h1 { font-size: 1.9rem; }
  .footer-grid { flex-direction: column; }
}