/* =====================================================================
   Documentation Center Platform — Hub Stylesheet
   Senior Technical Writer Portfolio · Sulagna Sasmal
   Design tokens: teal/cyan primary, warm neutral backgrounds
   Supports: light mode (default), dark mode (data-theme + prefers-color-scheme)
   ===================================================================== */

/* === RESET ======================================================== */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { font-size: 16px; scroll-behavior: smooth; }
img, svg { display: block; max-width: 100%; }

/* === DESIGN TOKENS (light) ======================================== */
:root {
  /* Brand */
  --clr-brand:        #0d9488;   /* teal-600 */
  --clr-brand-light:  #ccfbf1;   /* teal-100 */
  --clr-brand-dark:   #0f766e;   /* teal-700 */
  --clr-accent:       #06b6d4;   /* cyan-500 */
  --clr-accent-light: #cffafe;   /* cyan-100 */

  /* Background layers */
  --bg-page:          #f8fafc;
  --bg-surface:       #ffffff;
  --bg-surface-alt:   #f1f5f9;
  --bg-nav:           #ffffff;
  --bg-code:          #0f172a;
  --bg-tag:           #f0fdfa;

  /* Border */
  --bd-color:         #e2e8f0;
  --bd-code:          #1e293b;

  /* Text */
  --tx-base:          #0f172a;
  --tx-muted:         #475569;
  --tx-subtle:        #94a3b8;
  --tx-nav:           #334155;
  --tx-link:          #0d9488;
  --tx-link-hover:    #0f766e;
  --tx-code-base:     #e2e8f0;
  --tx-on-brand:      #ffffff;

  /* Syntax tokens */
  --syn-kw:           #7dd3fc;   /* keywords */
  --syn-str:          #86efac;   /* strings */
  --syn-num:          #fdba74;   /* numbers / booleans */
  --syn-cm:           #94a3b8;   /* comments */
  --syn-tp:           #67e8f9;   /* types */
  --syn-fn:           #c4b5fd;   /* functions */
  --syn-at:           #fca5a5;   /* attributes / decorators */
  --syn-pn:           #e2e8f0;   /* punctuation */

  /* Phase badge colours */
  --badge-api:        #dbeafe;
  --badge-api-tx:     #1e40af;
  --badge-sdk:        #ede9fe;
  --badge-sdk-tx:     #5b21b6;
  --badge-admin:      #fef9c3;
  --badge-admin-tx:   #854d0e;
  --badge-onboard:    #dcfce7;
  --badge-onboard-tx: #166534;
  --badge-portal:     #fce7f3;
  --badge-portal-tx:  #9d174d;

  /* Layout */
  --header-h:         60px;
  --nav-w:            268px;
  --content-max:      860px;

  /* Motion */
  --ease:             cubic-bezier(.4,0,.2,1);
  --dur:              180ms;

  /* Shadows */
  --shadow-sm:        0 1px 3px rgba(0,0,0,.08), 0 1px 2px rgba(0,0,0,.05);
  --shadow-md:        0 4px 12px rgba(0,0,0,.1), 0 2px 4px rgba(0,0,0,.06);
  --shadow-card:      0 2px 8px rgba(0,0,0,.07);

  /* Radius */
  --r-sm:             4px;
  --r-md:             8px;
  --r-lg:             12px;
  --r-xl:             16px;
  --r-full:           9999px;
}

/* === DESIGN TOKENS (dark) ========================================= */
[data-theme="dark"] {
  --clr-brand:        #2dd4bf;
  --clr-brand-light:  #042f2e;
  --clr-brand-dark:   #5eead4;
  --clr-accent:       #22d3ee;
  --clr-accent-light: #083344;

  --bg-page:          #0a0f1a;
  --bg-surface:       #111827;
  --bg-surface-alt:   #1a2234;
  --bg-nav:           #0f1623;
  --bg-code:          #060b14;
  --bg-tag:           #042f2e;

  --bd-color:         #1e2d40;
  --bd-code:          #1e3050;

  --tx-base:          #f1f5f9;
  --tx-muted:         #94a3b8;
  --tx-subtle:        #475569;
  --tx-nav:           #cbd5e1;
  --tx-link:          #2dd4bf;
  --tx-link-hover:    #5eead4;
  --tx-code-base:     #e2e8f0;
  --tx-on-brand:      #0a0f1a;

  --badge-api:        #1e3a5f;
  --badge-api-tx:     #93c5fd;
  --badge-sdk:        #2e1a5e;
  --badge-sdk-tx:     #c4b5fd;
  --badge-admin:      #3d2e00;
  --badge-admin-tx:   #fde68a;
  --badge-onboard:    #14290d;
  --badge-onboard-tx: #86efac;
  --badge-portal:     #4a0e2d;
  --badge-portal-tx:  #fbcfe8;

  --shadow-sm:        0 1px 3px rgba(0,0,0,.3);
  --shadow-md:        0 4px 12px rgba(0,0,0,.4);
  --shadow-card:      0 2px 8px rgba(0,0,0,.4);
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --clr-brand:        #2dd4bf;
    --clr-brand-light:  #042f2e;
    --clr-brand-dark:   #5eead4;
    --clr-accent:       #22d3ee;
    --clr-accent-light: #083344;
    --bg-page:          #0a0f1a;
    --bg-surface:       #111827;
    --bg-surface-alt:   #1a2234;
    --bg-nav:           #0f1623;
    --bg-code:          #060b14;
    --bg-tag:           #042f2e;
    --bd-color:         #1e2d40;
    --bd-code:          #1e3050;
    --tx-base:          #f1f5f9;
    --tx-muted:         #94a3b8;
    --tx-subtle:        #475569;
    --tx-nav:           #cbd5e1;
    --tx-link:          #2dd4bf;
    --tx-link-hover:    #5eead4;
    --tx-code-base:     #e2e8f0;
    --tx-on-brand:      #0a0f1a;
    --badge-api:        #1e3a5f;
    --badge-api-tx:     #93c5fd;
    --badge-sdk:        #2e1a5e;
    --badge-sdk-tx:     #c4b5fd;
    --badge-admin:      #3d2e00;
    --badge-admin-tx:   #fde68a;
    --badge-onboard:    #14290d;
    --badge-onboard-tx: #86efac;
    --badge-portal:     #4a0e2d;
    --badge-portal-tx:  #fbcfe8;
    --shadow-sm:        0 1px 3px rgba(0,0,0,.3);
    --shadow-md:        0 4px 12px rgba(0,0,0,.4);
    --shadow-card:      0 2px 8px rgba(0,0,0,.4);
  }
}

/* === BASE TYPOGRAPHY ============================================== */
body {
  font-family: 'Inter', 'Segoe UI', system-ui, -apple-system, sans-serif;
  background: var(--bg-page);
  color: var(--tx-base);
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
  transition: background var(--dur) var(--ease), color var(--dur) var(--ease);
}

h1, h2, h3, h4, h5, h6 {
  font-weight: 600;
  line-height: 1.25;
  letter-spacing: -.015em;
  color: var(--tx-base);
}

h1 { font-size: clamp(1.75rem, 4vw, 2.25rem); margin-bottom: 1rem; }
h2 { font-size: 1.5rem; margin: 2.5rem 0 .75rem; padding-top: 2.5rem;
     border-top: 1px solid var(--bd-color); }
h3 { font-size: 1.2rem; margin: 2rem 0 .6rem; }
h4 { font-size: 1rem; margin: 1.5rem 0 .5rem; text-transform: uppercase;
     letter-spacing: .06em; color: var(--tx-muted); }

p { margin-bottom: 1rem; color: var(--tx-base); }
a { color: var(--tx-link); text-decoration: none; transition: color var(--dur) var(--ease); }
a:hover { color: var(--tx-link-hover); text-decoration: underline; }

ul, ol { padding-left: 1.5rem; margin-bottom: 1rem; }
li { margin-bottom: .35rem; }
li > ul, li > ol { margin-top: .35rem; margin-bottom: 0; }

strong { font-weight: 600; }
em { font-style: italic; }

hr { border: none; border-top: 1px solid var(--bd-color); margin: 2rem 0; }

/* === HEADER ======================================================= */
.site-header {
  position: fixed;
  top: 0; left: 0; right: 0;
  height: var(--header-h);
  background: var(--bg-nav);
  border-bottom: 1px solid var(--bd-color);
  display: flex;
  align-items: center;
  padding: 0 1.25rem;
  z-index: 100;
  gap: 1rem;
  transition: background var(--dur) var(--ease), border-color var(--dur) var(--ease);
}

.header-logo {
  display: flex;
  align-items: center;
  gap: .6rem;
  text-decoration: none !important;
  flex-shrink: 0;
}

.header-logo-icon {
  width: 32px; height: 32px;
  background: var(--clr-brand);
  border-radius: var(--r-md);
  display: flex; align-items: center; justify-content: center;
  color: var(--tx-on-brand);
  font-weight: 700;
  font-size: .9rem;
  flex-shrink: 0;
}

.header-logo-text {
  font-size: .95rem;
  font-weight: 600;
  color: var(--tx-base);
  line-height: 1.2;
}

.header-logo-sub {
  font-size: .7rem;
  font-weight: 400;
  color: var(--tx-muted);
  display: block;
}

.header-spacer { flex: 1; }

.header-actions {
  display: flex;
  align-items: center;
  gap: .5rem;
}

.btn-icon {
  width: 36px; height: 36px;
  border-radius: var(--r-md);
  border: 1px solid var(--bd-color);
  background: var(--bg-surface);
  color: var(--tx-muted);
  cursor: pointer;
  display: flex; align-items: center; justify-content: center;
  transition: background var(--dur) var(--ease), color var(--dur) var(--ease), border-color var(--dur) var(--ease);
  font-size: .85rem;
}
.btn-icon:hover { background: var(--bg-surface-alt); color: var(--tx-base); border-color: var(--clr-brand); }

.hamburger { display: none; }

/* === SITE LAYOUT ================================================== */
.site-body {
  display: flex;
  padding-top: var(--header-h);
  min-height: 100vh;
}

/* === SIDEBAR ====================================================== */
.site-nav {
  position: fixed;
  top: var(--header-h);
  left: 0;
  width: var(--nav-w);
  height: calc(100vh - var(--header-h));
  overflow-y: auto;
  background: var(--bg-nav);
  border-right: 1px solid var(--bd-color);
  padding: 1.5rem 0 2rem;
  transition: transform var(--dur) var(--ease), background var(--dur) var(--ease);
  scrollbar-width: thin;
  scrollbar-color: var(--bd-color) transparent;
}

.nav-section { margin-bottom: 1.5rem; }

.nav-section-label {
  font-size: .7rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: .1em;
  color: var(--tx-subtle);
  padding: 0 1.25rem;
  margin-bottom: .5rem;
  display: block;
}

.nav-link {
  display: flex;
  align-items: center;
  gap: .5rem;
  padding: .42rem 1.25rem;
  font-size: .875rem;
  color: var(--tx-nav);
  text-decoration: none !important;
  border-left: 3px solid transparent;
  transition: background var(--dur) var(--ease), color var(--dur) var(--ease), border-color var(--dur) var(--ease);
  line-height: 1.4;
}

.nav-link:hover {
  background: var(--bg-surface-alt);
  color: var(--tx-base);
}

.nav-link.active {
  background: var(--clr-brand-light);
  color: var(--clr-brand);
  border-left-color: var(--clr-brand);
  font-weight: 600;
}

[data-theme="dark"] .nav-link.active {
  background: rgba(13, 148, 136, .15);
  color: var(--clr-brand);
}

.nav-icon {
  width: 1rem;
  font-style: normal;
  flex-shrink: 0;
  text-align: center;
}

/* === MAIN CONTENT ================================================= */
.main-content {
  flex: 1;
  margin-left: var(--nav-w);
  padding: 3rem 2.5rem 5rem;
  min-width: 0;
}

.content-wrap {
  max-width: var(--content-max);
  margin: 0 auto;
}

/* === HERO ========================================================= */
.hero {
  padding: 3rem 0 2.5rem;
  border-bottom: 1px solid var(--bd-color);
  margin-bottom: 2.5rem;
}

.hero-eyebrow {
  font-size: .8rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: .1em;
  color: var(--clr-brand);
  margin-bottom: .5rem;
}

.hero-title {
  font-size: clamp(2rem, 5vw, 2.8rem);
  font-weight: 700;
  letter-spacing: -.025em;
  color: var(--tx-base);
  line-height: 1.15;
  margin-bottom: 1rem;
}

.hero-title span {
  background: linear-gradient(135deg, var(--clr-brand), var(--clr-accent));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-subtitle {
  font-size: 1.1rem;
  color: var(--tx-muted);
  max-width: 600px;
  margin-bottom: 1.75rem;
  line-height: 1.7;
}

.hero-meta {
  display: flex;
  flex-wrap: wrap;
  gap: .5rem .75rem;
  align-items: center;
}

.hero-stat {
  display: flex;
  align-items: center;
  gap: .35rem;
  font-size: .85rem;
  color: var(--tx-muted);
}

.hero-stat strong {
  color: var(--tx-base);
}

.hero-stat::after {
  content: "·";
  margin-left: .75rem;
  color: var(--tx-subtle);
}

.hero-stat:last-child::after { display: none; }

/* === PHASE GRID =================================================== */
.phase-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(340px, 1fr));
  gap: 1.25rem;
  margin: 1.5rem 0 2.5rem;
}

.phase-card {
  background: var(--bg-surface);
  border: 1px solid var(--bd-color);
  border-radius: var(--r-lg);
  padding: 1.5rem;
  text-decoration: none !important;
  display: flex;
  flex-direction: column;
  gap: .75rem;
  transition: box-shadow var(--dur) var(--ease), border-color var(--dur) var(--ease), transform var(--dur) var(--ease);
  box-shadow: var(--shadow-card);
  position: relative;
  overflow: hidden;
}

.phase-card::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--clr-brand), var(--clr-accent));
  opacity: 0;
  transition: opacity var(--dur) var(--ease);
}

.phase-card:hover {
  box-shadow: var(--shadow-md);
  border-color: var(--clr-brand);
  transform: translateY(-2px);
  text-decoration: none;
}

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

.phase-card-header {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: .75rem;
}

.phase-num {
  font-size: .7rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: .1em;
  color: var(--tx-subtle);
  flex-shrink: 0;
  margin-top: .15rem;
}

.phase-title {
  font-size: 1rem;
  font-weight: 600;
  color: var(--tx-base);
  line-height: 1.3;
  margin: 0;
}

.phase-desc {
  font-size: .865rem;
  color: var(--tx-muted);
  line-height: 1.6;
  margin: 0;
}

.phase-tags {
  display: flex;
  flex-wrap: wrap;
  gap: .4rem;
  margin-top: .25rem;
}

.tag {
  font-size: .7rem;
  font-weight: 600;
  padding: .25rem .6rem;
  border-radius: var(--r-full);
  letter-spacing: .02em;
}

.tag-api    { background: var(--badge-api);     color: var(--badge-api-tx); }
.tag-sdk    { background: var(--badge-sdk);     color: var(--badge-sdk-tx); }
.tag-admin  { background: var(--badge-admin);   color: var(--badge-admin-tx); }
.tag-onboard{ background: var(--badge-onboard); color: var(--badge-onboard-tx); }
.tag-portal { background: var(--badge-portal);  color: var(--badge-portal-tx); }
.tag-default{ background: var(--bg-surface-alt); color: var(--tx-muted); }

.phase-card--current { border-color: var(--clr-brand); }

.phase-link {
  font-size: .8rem;
  font-weight: 600;
  color: var(--clr-brand);
  display: flex;
  align-items: center;
  gap: .3rem;
  margin-top: auto;
  padding-top: .5rem;
}

/* === SKILLS SECTION =============================================== */
.skills-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
  gap: 1rem;
  margin: 1.25rem 0;
}

.skill-card {
  background: var(--bg-surface);
  border: 1px solid var(--bd-color);
  border-radius: var(--r-lg);
  padding: 1.25rem;
  box-shadow: var(--shadow-card);
}

.skill-icon {
  font-size: 1.5rem;
  margin-bottom: .5rem;
}

.skill-name {
  font-size: .95rem;
  font-weight: 600;
  margin-bottom: .3rem;
}

.skill-items {
  font-size: .8rem;
  color: var(--tx-muted);
  list-style: none;
  padding: 0;
  margin: 0;
}

.skill-items li { margin-bottom: .2rem; }
.skill-items li::before { content: "· "; color: var(--clr-brand); }

/* === STANDARDS/INFO SECTION ======================================= */
.info-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.25rem;
  margin: 1.25rem 0;
}

.info-card {
  background: var(--bg-surface);
  border: 1px solid var(--bd-color);
  border-radius: var(--r-lg);
  padding: 1.5rem;
  box-shadow: var(--shadow-card);
}

.info-card h3 { font-size: 1rem; margin: 0 0 .75rem; }

/* === META DOCS NAV (inside-page) ================================== */
.meta-docs {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1rem;
  margin: 1.25rem 0 2.5rem;
}

.meta-doc-link {
  background: var(--bg-surface);
  border: 1px solid var(--bd-color);
  border-radius: var(--r-lg);
  padding: 1.25rem;
  text-decoration: none !important;
  display: flex;
  flex-direction: column;
  gap: .4rem;
  transition: box-shadow var(--dur) var(--ease), border-color var(--dur) var(--ease);
  box-shadow: var(--shadow-card);
}

.meta-doc-link:hover {
  box-shadow: var(--shadow-md);
  border-color: var(--clr-brand);
}

.meta-doc-icon { font-size: 1.4rem; }
.meta-doc-title { font-size: .9rem; font-weight: 600; color: var(--tx-base); }
.meta-doc-desc  { font-size: .78rem; color: var(--tx-muted); line-height: 1.5; }

/* === ARTICLE CONTENT (inner doc pages) ============================ */
.article-hero {
  padding: 2rem 0 2rem;
  border-bottom: 1px solid var(--bd-color);
  margin-bottom: 2.5rem;
}

.breadcrumb {
  display: flex;
  align-items: center;
  gap: .4rem;
  font-size: .8rem;
  color: var(--tx-muted);
  margin-bottom: .75rem;
  flex-wrap: wrap;
}

.breadcrumb a { color: var(--tx-muted); text-decoration: none; }
.breadcrumb a:hover { color: var(--tx-link); }
.breadcrumb-sep { color: var(--tx-subtle); }

/* === PROSE UTILITIES ============================================== */
.lead {
  font-size: 1.1rem;
  color: var(--tx-muted);
  line-height: 1.75;
  margin-bottom: 1.5rem;
}

.callout {
  border-radius: var(--r-md);
  padding: 1rem 1.25rem;
  margin: 1.5rem 0;
  display: flex;
  gap: .75rem;
  border-left: 4px solid;
}

.callout-icon { font-size: 1.1rem; flex-shrink: 0; margin-top: .05rem; }
.callout-body h4 { font-size: .875rem; font-weight: 700; text-transform: none; letter-spacing: 0;
                    color: inherit; margin: 0 0 .35rem; }
.callout-body p  { font-size: .875rem; margin: 0; }

.callout-note {
  background: #eff6ff; border-left-color: #3b82f6; color: #1e40af;
}
.callout-note .callout-body h4 { color: #1e40af; }
.callout-note .callout-body p  { color: #1d4ed8; }

.callout-tip {
  background: var(--clr-brand-light); border-left-color: var(--clr-brand); color: var(--clr-brand-dark);
}
.callout-tip .callout-body h4 { color: var(--clr-brand-dark); }
.callout-tip .callout-body p  { color: var(--clr-brand); }

.callout-warning {
  background: #fffbeb; border-left-color: #f59e0b; color: #92400e;
}
.callout-warning .callout-body h4 { color: #92400e; }
.callout-warning .callout-body p  { color: #b45309; }

[data-theme="dark"] .callout-note    { background: #1e3a5f; color: #93c5fd; }
[data-theme="dark"] .callout-note .callout-body h4 { color: #bfdbfe; }
[data-theme="dark"] .callout-note .callout-body p  { color: #93c5fd; }
[data-theme="dark"] .callout-tip     { background: #042f2e; color: #5eead4; }
[data-theme="dark"] .callout-tip .callout-body h4 { color: #99f6e4; }
[data-theme="dark"] .callout-tip .callout-body p  { color: #5eead4; }
[data-theme="dark"] .callout-warning { background: #422006; color: #fde68a; }
[data-theme="dark"] .callout-warning .callout-body h4 { color: #fef08a; }
[data-theme="dark"] .callout-warning .callout-body p  { color: #fde68a; }

/* === CODE BLOCKS ================================================== */
pre {
  background: var(--bg-code);
  border: 1px solid var(--bd-code);
  border-radius: var(--r-md);
  padding: 1.25rem;
  overflow-x: auto;
  margin: 1rem 0 1.5rem;
  position: relative;
  font-size: .875rem;
  line-height: 1.65;
}

code {
  font-family: 'JetBrains Mono', 'Fira Code', 'Cascadia Code', Consolas, monospace;
  font-size: .875em;
}

pre code {
  color: var(--tx-code-base);
  background: none;
  border: none;
  padding: 0;
  font-size: 1em;
}

:not(pre) > code {
  background: var(--bg-surface-alt);
  color: var(--clr-brand);
  border: 1px solid var(--bd-color);
  border-radius: var(--r-sm);
  padding: .15em .45em;
}

.copy-btn {
  position: absolute;
  top: .6rem; right: .6rem;
  background: rgba(255,255,255,.07);
  border: 1px solid rgba(255,255,255,.12);
  color: var(--tx-subtle);
  border-radius: var(--r-sm);
  padding: .25rem .6rem;
  font-size: .7rem;
  font-family: inherit;
  cursor: pointer;
  transition: background var(--dur) var(--ease), color var(--dur) var(--ease);
}
.copy-btn:hover { background: rgba(255,255,255,.15); color: var(--tx-code-base); }
.copy-btn.copied { color: var(--syn-str); border-color: var(--syn-str); }

/* Syntax tokens */
.kw { color: var(--syn-kw); }
.str { color: var(--syn-str); }
.num { color: var(--syn-num); }
.cm  { color: var(--syn-cm); font-style: italic; }
.tp  { color: var(--syn-tp); }
.fn  { color: var(--syn-fn); }
.at  { color: var(--syn-at); }
.pn  { color: var(--syn-pn); }

/* === TABLES ======================================================= */
.table-wrap { overflow-x: auto; margin: 1rem 0 1.5rem; border-radius: var(--r-md);
               border: 1px solid var(--bd-color); }

table { width: 100%; border-collapse: collapse; font-size: .875rem; }
thead th {
  background: var(--bg-surface-alt);
  padding: .7rem 1rem;
  text-align: left;
  font-weight: 600;
  font-size: .78rem;
  text-transform: uppercase;
  letter-spacing: .06em;
  color: var(--tx-muted);
  border-bottom: 1px solid var(--bd-color);
}
tbody td {
  padding: .7rem 1rem;
  border-bottom: 1px solid var(--bd-color);
  vertical-align: top;
}
tbody tr:last-child td { border-bottom: none; }
tbody tr:hover { background: var(--bg-surface-alt); }

/* === BEFORE/AFTER COMPARISON ====================================== */
.compare-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1rem;
  margin: 1rem 0 1.5rem;
}

.compare-pane { border-radius: var(--r-md); overflow: hidden; }
.compare-label {
  padding: .45rem 1rem;
  font-size: .7rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: .08em;
}
.compare-before .compare-label { background: #fee2e2; color: #991b1b; }
.compare-after  .compare-label { background: #dcfce7; color: #166534; }
[data-theme="dark"] .compare-before .compare-label { background: #450a0a; color: #fca5a5; }
[data-theme="dark"] .compare-after  .compare-label { background: #14290d; color: #86efac; }

.compare-pane pre { border-radius: 0; margin: 0; border-top: none; }

/* === STEP LIST ==================================================== */
.steps       { list-style: none; padding: 0; counter-reset: step; }
.steps li    { counter-increment: step; display: flex; gap: 1rem; margin-bottom: 1.5rem; }
.step-num    {
  width: 2rem; height: 2rem;
  background: var(--clr-brand);
  color: var(--tx-on-brand);
  border-radius: var(--r-full);
  display: flex; align-items: center; justify-content: center;
  font-size: .8rem; font-weight: 700;
  flex-shrink: 0;
}
.step-body   { flex: 1; padding-top: .25rem; }
.step-title  { font-weight: 600; margin-bottom: .35rem; }

/* === FOOTER ======================================================= */
.site-footer {
  margin-left: var(--nav-w);
  border-top: 1px solid var(--bd-color);
  padding: 1.5rem 2.5rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: .75rem;
}

.footer-text { font-size: .825rem; color: var(--tx-subtle); }
.footer-links { display: flex; gap: 1.25rem; }
.footer-links a { font-size: .825rem; color: var(--tx-muted); text-decoration: none; }
.footer-links a:hover { color: var(--tx-link); }

/* === RESPONSIVE =================================================== */
@media (max-width: 900px) {
  :root { --nav-w: 0px; }

  .site-nav {
    transform: translateX(-268px);
    width: 268px;
    z-index: 90;
    box-shadow: var(--shadow-md);
  }

  .site-nav.open {
    transform: translateX(0);
  }

  .hamburger {
    display: flex;
    margin-right: .25rem;
  }

  .main-content, .site-footer {
    margin-left: 0;
  }

  .info-row, .meta-docs, .compare-grid {
    grid-template-columns: 1fr;
  }

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

@media (max-width: 600px) {
  .main-content { padding: 2rem 1rem 4rem; }
  h1 { font-size: 1.75rem; }
  .hero-title { font-size: 1.9rem; }
  .skills-grid { grid-template-columns: 1fr 1fr; }
}