@import url('https://fonts.googleapis.com/css2?family=DM+Sans:ital,opsz,wght@0,9..40,300;0,9..40,400;0,9..40,500;0,9..40,600;0,9..40,700;1,9..40,400&family=DM+Mono:wght@400;500&display=swap');

:root {
  --mc: #7F59ED;
  --mc-dark: #6644D4;
  --mc-darker: #4F2FC0;
  --mc-light: #EDE8FC;
  --mc-mid: #A98FF4;
  --bg: #191B25;
  --bg2: #21242F;
  --bg3: #2A2D3A;
  --white: #21242F;
  --text: #F0F0F0;
  --text2: #B8BBCC;
  --text3: #7A7D90;
  --border: rgba(255,255,255,0.07);
  --border2: rgba(255,255,255,0.13);
  --warn-bg: #2D2410;
  --warn-border: #E8A020;
  --warn-text: #F0C070;
  --info-bg: #1E1A30;
  --info-border: #7F59ED;
  --info-text: #C4B0F8;
  --sidebar-w: 272px;
  --font: 'DM Sans', sans-serif;
  --mono: 'DM Mono', monospace;
  --radius: 10px;
  --radius-lg: 14px;
  --shadow: 0 1px 3px rgba(0,0,0,0.3), 0 4px 16px rgba(0,0,0,0.2);
  --shadow-md: 0 4px 12px rgba(0,0,0,0.3), 0 1px 3px rgba(0,0,0,0.2);
}

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { font-size: 16px; scroll-behavior: smooth; }
body { font-family: var(--font); background: var(--bg); color: var(--text); line-height: 1.6; min-height: 100vh; }

/* ── LAYOUT ── */
#layout { display: flex; min-height: 100vh; }

/* ── SIDEBAR ── */
#sidebar {
  width: var(--sidebar-w);
  background: var(--bg2);
  border-right: 1px solid var(--border);
  display: flex; flex-direction: column;
  position: fixed; top: 0; left: 0; bottom: 0;
  overflow-y: auto; z-index: 100;
  transition: transform 0.28s cubic-bezier(.4,0,.2,1);
}
#sidebar::-webkit-scrollbar { width: 4px; }
#sidebar::-webkit-scrollbar-thumb { background: var(--bg3); border-radius: 2px; }

.sb-logo {
  padding: 14px 22px;
  border-bottom: 1px solid var(--border);
  display: flex; align-items: center;
  flex-shrink: 0; text-decoration: none;
}
.sb-logo-mark {
  width: 32px; height: 32px;
  background: var(--mc); border-radius: 8px;
  display: flex; align-items: center; justify-content: center;
  flex-shrink: 0;
}
.sb-logo-mark svg { width: 16px; height: 16px; }
.sb-logo-name { font-size: 15px; font-weight: 600; color: var(--text); letter-spacing: -0.02em; }
.sb-logo-tag { font-size: 11px; color: var(--text3); font-weight: 400; margin-top: 1px; }

.sb-search {
  padding: 14px 16px;
  border-bottom: 1px solid var(--border);
}
.sb-search form { display: flex; gap: 6px; }
.sb-search input {
  flex: 1; padding: 7px 11px;
  border: 1px solid var(--border2); border-radius: var(--radius);
  font-family: var(--font); font-size: 13px; color: var(--text);
  background: var(--bg); outline: none; transition: border-color .15s;
}
.sb-search input:focus { border-color: var(--mc); }
.sb-search button {
  padding: 7px 12px; background: var(--mc); color: #fff;
  border: none; border-radius: var(--radius); cursor: pointer;
  font-size: 13px; transition: background .15s;
}
.sb-search button:hover { background: var(--mc-dark); }

#sb-nav { flex: 1; padding: 10px 0 24px; }
.ns { margin-bottom: 2px; }
.ns-title {
  font-size: 10.5px; font-weight: 600; color: var(--text3);
  text-transform: uppercase; letter-spacing: .08em;
  padding: 14px 22px 5px;
}
.ni {
  display: flex; align-items: center; gap: 9px;
  padding: 7px 22px; font-size: 14px; font-weight: 400; color: var(--text2);
  cursor: pointer; text-decoration: none;
  border-left: 2px solid transparent;
  transition: background .12s, color .12s;
}
.ni .ic { font-size: 14px; width: 18px; text-align: center; flex-shrink: 0; opacity: .7; }
.ni:hover { background: var(--bg2); color: var(--text); }
.ni:hover .ic { opacity: 1; }
.ni.active { background: var(--mc-light); color: var(--mc-darker); font-weight: 500; border-left-color: var(--mc); }
.ni.active .ic { opacity: 1; }
.ni-sub { padding-left: 49px; font-size: 13px; }

/* ── MAIN ── */
#main { flex: 1; margin-left: var(--sidebar-w); display: flex; flex-direction: column; min-height: 100vh; }

/* ── TOPBAR ── */
#topbar {
  background: var(--bg2); border-bottom: 1px solid var(--border);
  padding: 0 40px; height: 52px;
  display: flex; align-items: center; justify-content: space-between;
  position: sticky; top: 0; z-index: 50; flex-shrink: 0;
}
.breadcrumbs { display: flex; align-items: center; gap: 5px; flex-wrap: wrap; }
.cr { font-size: 13px; color: var(--text3); text-decoration: none; transition: color .1s; white-space: nowrap; }
.cr:hover { color: var(--mc); }
.cr.cur { color: var(--text); font-weight: 500; cursor: default; }
.cr-sep { font-size: 13px; color: var(--border2); }
#menu-toggle { display: none; background: none; border: none; cursor: pointer; padding: 6px; color: var(--text2); }

/* ── CONTENT ── */
#content { flex: 1; }

/* ── HOME ── */
.home-hero { padding: 56px 56px 40px; }
.home-hero h1 { font-size: 34px; font-weight: 700; letter-spacing: -0.04em; color: var(--text); margin-bottom: 12px; }
.home-hero p { font-size: 17px; color: var(--text2); max-width: 520px; line-height: 1.7; }
.home-search { display: flex; gap: 10px; margin-top: 28px; max-width: 560px; }
.home-search input { flex: 1; padding: 14px 18px; font-size: 16px; border: 2px solid var(--border); border-radius: var(--radius); background: var(--white); color: var(--text); outline: none; transition: border-color .15s; }
.home-search input:focus { border-color: var(--mc); }
.home-search button { padding: 14px 28px; font-size: 16px; font-weight: 600; background: var(--mc); color: #fff; border: none; border-radius: var(--radius); cursor: pointer; transition: background .15s; white-space: nowrap; }
.home-search button:hover { background: var(--mc-darker); }
.home-cats { display: grid; grid-template-columns: repeat(auto-fit, minmax(200px, 1fr)); gap: 14px; padding: 0 56px 40px; }
.hc {
  background: var(--bg2); border: 1px solid var(--border);
  border-radius: var(--radius-lg); padding: 22px; cursor: pointer;
  text-decoration: none; display: block;
  transition: border-color .15s, box-shadow .15s;
}
.hc:hover { border-color: var(--mc-mid); box-shadow: var(--shadow); }
.hc-icon {
  width: 40px; height: 40px; border-radius: 10px;
  display: flex; align-items: center; justify-content: center;
  font-size: 19px; margin-bottom: 14px;
}
.hc-icon.g { background: var(--mc-light); }
.hc-icon.o { background: #FFF0D6; }
.hc-icon.b { background: #E6F1FB; }
.hc-icon.p { background: #EEEDFE; }
.hc h3 { font-size: 15px; font-weight: 600; color: var(--text); margin-bottom: 6px; letter-spacing: -0.01em; }
.hc p { font-size: 13px; color: var(--text3); line-height: 1.55; }
.home-section { padding: 0 56px 48px; }
.home-section h2 { font-size: 18px; font-weight: 600; color: var(--text); letter-spacing: -0.02em; margin-bottom: 16px; padding-bottom: 12px; border-bottom: 1px solid var(--border); }
.art-list { display: flex; flex-direction: column; }
.art-row {
  display: flex; align-items: center; justify-content: space-between;
  padding: 13px 0; border-bottom: 1px solid var(--border);
  text-decoration: none; gap: 16px; background: var(--bg2);
  transition: background .1s;
}
.art-row:last-child { border-bottom: none; }
.art-row:hover .ar-title { color: var(--mc); }
.ar-title { font-size: 15px; font-weight: 500; color: var(--text); margin-bottom: 2px; transition: color .1s; }
.ar-sub { font-size: 13px; color: var(--text3); }
.ar-arr { font-size: 18px; color: var(--border2); flex-shrink: 0; }

/* ── PAGE HERO ── */
.pg-hero { padding: 44px 56px 32px; border-bottom: 1px solid var(--border); background: var(--bg2); }
.pg-hero h1 { font-size: 30px; font-weight: 700; color: var(--text); letter-spacing: -0.03em; line-height: 1.25; margin-bottom: 12px; }
.pg-hero .sub { font-size: 16px; color: var(--text2); line-height: 1.75; max-width: 600px; margin-bottom: 16px; }
.pg-hero .meta { display: flex; align-items: center; gap: 8px; flex-wrap: wrap; }
.badge { display: inline-flex; align-items: center; font-size: 12px; font-weight: 500; padding: 3px 10px; border-radius: 20px; background: var(--mc-light); color: var(--mc-darker); }
.badge.warn { background: #FFF0D6; color: #8B5200; }
.badge.neu { background: var(--bg2); color: var(--text2); border: 1px solid var(--border2); }

/* ── PAGE BODY ── */
.pg-body { padding: 36px 56px; max-width: 860px; }
.pg-body h2 { font-size: 20px; font-weight: 600; color: var(--text); letter-spacing: -0.025em; margin: 32px 0 14px; padding-bottom: 10px; border-bottom: 1px solid var(--border); }
.pg-body h2:first-child { margin-top: 0; }
.pg-body h3 { font-size: 16px; font-weight: 600; color: var(--text); margin: 22px 0 8px; }
.pg-body h4 { font-size: 15px; font-weight: 600; color: var(--text); margin: 18px 0 6px; }
.pg-body p { font-size: 15px; color: var(--text2); line-height: 1.8; margin-bottom: 14px; }
.pg-body ul, .pg-body ol { padding-left: 22px; font-size: 15px; color: var(--text2); line-height: 1.9; margin-bottom: 14px; }
.pg-body li { margin-bottom: 3px; }
.pg-body li strong { color: var(--text); font-weight: 600; }
.pg-body a { color: var(--mc-dark); text-decoration: underline; text-underline-offset: 3px; font-weight: 500; }
.pg-body a:hover { color: var(--mc); }
.pg-body strong { color: var(--text); font-weight: 600; }
.pg-body code { font-family: var(--mono); font-size: 13px; background: var(--bg3); padding: 2px 6px; border-radius: 4px; }
.pg-body pre { background: var(--text); color: #e5e7eb; padding: 18px 20px; border-radius: var(--radius); overflow-x: auto; margin: 16px 0; }
.pg-body pre code { background: none; padding: 0; color: inherit; }
.pg-body img { max-width: 100%; border-radius: var(--radius); margin: 16px 0; box-shadow: var(--shadow); }
.pg-body table { width: 100%; border-collapse: collapse; font-size: 14px; margin: 16px 0; }
.pg-body th { text-align: left; padding: 9px 14px; background: var(--bg2); color: var(--text); font-weight: 600; font-size: 13px; border-bottom: 1px solid var(--border2); }
.pg-body td { padding: 9px 14px; border-bottom: 1px solid var(--border); color: var(--text2); }
.pg-body tr:last-child td { border-bottom: none; }
.pg-body tr:hover td { background: var(--bg2); }
.pg-body blockquote { border-left: 3px solid var(--mc); padding: 12px 18px; background: var(--mc-light); border-radius: 0 var(--radius) var(--radius) 0; margin: 16px 0; color: var(--mc-darker); font-size: 15px; line-height: 1.7; }
.pg-body hr { border: none; border-top: 1px solid var(--border); margin: 28px 0; }

/* Callout boxes via HTML classes */
.pg-body .info { background: var(--info-bg); border-left: 3px solid var(--mc); border-radius: 0 var(--radius) var(--radius) 0; padding: 14px 18px; margin: 18px 0; font-size: 14px; color: var(--info-text); line-height: 1.75; }
.pg-body .warn { background: var(--warn-bg); border-left: 3px solid var(--warn-border); border-radius: 0 var(--radius) var(--radius) 0; padding: 14px 18px; margin: 18px 0; font-size: 14px; color: var(--warn-text); line-height: 1.75; }
.pg-body .step { display: flex; gap: 16px; margin-bottom: 16px; align-items: flex-start; }
.pg-body .step-n { width: 28px; height: 28px; border-radius: 50%; background: var(--mc); color: #fff; font-size: 12px; font-weight: 700; display: flex; align-items: center; justify-content: center; flex-shrink: 0; margin-top: 1px; }
.pg-body .step-body strong { font-size: 15px; font-weight: 600; color: var(--text); display: block; margin-bottom: 3px; }
.pg-body .step-body span { font-size: 14px; color: var(--text2); line-height: 1.7; }

/* ── RELATED ── */
.related-box { padding: 28px 56px 48px; border-top: 1px solid var(--border); background: var(--bg); }
.related-box h4 { font-size: 11px; font-weight: 600; text-transform: uppercase; letter-spacing: .08em; color: var(--text3); margin-bottom: 14px; }
.related-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(170px, 1fr)); gap: 10px; }
.rc { background: var(--bg2); border: 1px solid var(--border); border-radius: var(--radius-lg); padding: 15px 18px; text-decoration: none; display: block; transition: border-color .15s, box-shadow .15s; }
.rc:hover { border-color: var(--mc-mid); box-shadow: var(--shadow); }
.rc .rt { font-size: 13px; font-weight: 600; color: var(--text); margin-bottom: 3px; }
.rc .rs { font-size: 12px; color: var(--text3); }

/* ── SECTION PAGE ── */
.section-hero { padding: 44px 56px 32px; border-bottom: 1px solid var(--border); background: var(--white); }
.section-hero .s-icon { font-size: 32px; margin-bottom: 12px; display: block; }
.section-hero h1 { font-size: 28px; font-weight: 700; letter-spacing: -0.03em; color: var(--text); margin-bottom: 10px; }
.section-hero p { font-size: 15px; color: var(--text2); max-width: 500px; line-height: 1.7; }
.section-pages { padding: 36px 56px 56px; max-width: 860px; }
.sp-card { display: flex; align-items: flex-start; gap: 16px; padding: 16px 0; border-bottom: 1px solid var(--border); text-decoration: none; }
.sp-card:last-child { border-bottom: none; }
.sp-card:hover .sp-title { color: var(--mc); }
.sp-num { width: 28px; height: 28px; border-radius: 50%; background: var(--bg2); color: var(--text3); font-size: 12px; font-weight: 600; display: flex; align-items: center; justify-content: center; flex-shrink: 0; margin-top: 2px; }
.sp-title { font-size: 15px; font-weight: 600; color: var(--text); margin-bottom: 3px; transition: color .1s; }
.sp-sub { font-size: 13px; color: var(--text3); }

/* ── SEARCH ── */
.search-wrap { padding: 40px 56px; }
.search-wrap h1 { font-size: 22px; font-weight: 600; margin-bottom: 24px; }
.search-result { padding: 16px 0; border-bottom: 1px solid var(--border); text-decoration: none; display: block; }
.search-result:hover .sr-title { color: var(--mc); }
.sr-title { font-size: 15px; font-weight: 600; color: var(--text); margin-bottom: 4px; transition: color .1s; }
.sr-sub { font-size: 13px; color: var(--text3); margin-bottom: 4px; }
.sr-section { font-size: 11px; font-weight: 500; color: var(--mc-dark); text-transform: uppercase; letter-spacing: .05em; }
.no-results { text-align: center; padding: 56px 20px; color: var(--text3); }
.no-results .nr-icon { font-size: 40px; margin-bottom: 12px; }
.no-results p { font-size: 15px; }

/* ── FEEDBACK ── */
.feedback-box { padding: 28px 56px; border-top: 1px solid var(--border); }
.fb-question { font-size: 15px; font-weight: 500; color: var(--text); margin-bottom: 14px; }
.fb-buttons { display: flex; gap: 10px; }
.fb-btn { padding: 8px 20px; font-size: 14px; font-weight: 500; border-radius: var(--radius); cursor: pointer; background: var(--bg3); transition: background .15s, border-color .15s; }
.fb-yes { border: 1.5px solid #3A7D44; color: #6FCF87; }
.fb-yes:hover { background: rgba(111,207,135,.12); }
.fb-no { border: 1.5px solid #8B3A3A; color: #EB7070; }
.fb-no:hover { background: rgba(235,112,112,.12); }
#fb-text { width: 100%; max-width: 520px; padding: 10px 12px; font-size: 14px; font-family: var(--font); color: var(--text); background: var(--bg3); border: 1px solid var(--border2); border-radius: var(--radius); outline: none; resize: vertical; margin-bottom: 12px; display: block; }
#fb-text:focus { border-color: var(--mc); }
.fb-submit { padding: 9px 22px; font-size: 14px; font-weight: 600; background: var(--mc); color: #fff; border: none; border-radius: var(--radius); cursor: pointer; transition: background .15s; }
.fb-submit:hover { background: var(--mc-dark); }
.fb-thanks { font-size: 15px; color: var(--text2); }

/* ── OVERLAY ── */
#sb-overlay { display: none; position: fixed; inset: 0; background: rgba(0,0,0,.35); z-index: 99; }

/* ── RESPONSIVE ── */
@media (max-width: 960px) {
  #sidebar { transform: translateX(-100%); }
  #sidebar.open { transform: translateX(0); box-shadow: 4px 0 24px rgba(0,0,0,.1); }
  #sb-overlay.show { display: block; }
  #main { margin-left: 0; }
  #menu-toggle { display: flex; }
  #topbar { padding: 0 20px; }
  .pg-hero, .section-hero, .home-hero { padding: 28px 24px 22px; }
  .pg-body, .section-pages, .search-wrap { padding: 24px; }
  .home-cats { padding: 0 24px 28px; grid-template-columns: 1fr 1fr; }
  .home-section { padding: 0 24px 36px; }
  .related-box { padding: 24px; }
}
@media (max-width: 540px) {
  .home-cats { grid-template-columns: 1fr; }
  .pg-hero h1 { font-size: 22px; }
  .home-hero h1 { font-size: 26px; }
}