/* ==========================================================================
   Cottonspace / Dev Labs Technical Reports Shared CSS
   Publication-Grade Academic & Professional Styling Guide
   ========================================================================== */

@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700;800&family=Outfit:wght@400;500;600;700;800&family=JetBrains+Mono:wght@400;500;600;700&display=swap');

:root {
  /* Color Tokens - Authoritative Slate & Utility Accents */
  --bg-base: #f8fafc;
  --bg-card: #ffffff;
  --bg-card-hover: #f1f5f9;
  --bg-secondary: #f1f5f9;
  
  --border: #e2e8f0;
  --border-accent: #cbd5e1;
  --border-glass: rgba(226, 232, 240, 0.8);
  
  --text-primary: #0f172a;
  --text-secondary: #475569;
  --text-muted: #64748b;
  
  /* Brand/Utility Colors */
  --accent-teal: #0891b2;
  --accent-teal-glow: rgba(8, 145, 178, 0.06);
  --accent-teal-border: rgba(8, 145, 178, 0.2);
  
  --accent-indigo: #4f46e5;
  --accent-indigo-glow: rgba(79, 70, 229, 0.06);
  --accent-indigo-border: rgba(79, 70, 229, 0.2);
  
  --accent-purple: #7c3aed;
  --accent-purple-glow: rgba(124, 58, 237, 0.06);
  --accent-purple-border: rgba(124, 58, 237, 0.2);

  --accent-orange: #ea580c;
  --accent-orange-glow: rgba(234, 88, 12, 0.06);
  --accent-orange-border: rgba(234, 88, 12, 0.2);

  --color-green: #16a34a;
  --color-green-glow: rgba(22, 163, 74, 0.06);
  --color-green-border: rgba(22, 163, 74, 0.25);
  
  --color-red: #dc2626;
  --color-red-glow: rgba(220, 38, 38, 0.06);
  --color-red-border: rgba(220, 38, 38, 0.25);
  
  --color-amber: #d97706;
  --color-amber-glow: rgba(217, 119, 6, 0.06);
  --color-amber-border: rgba(217, 119, 6, 0.25);

  --color-blue: #2563eb;
  --color-blue-glow: rgba(37, 99, 235, 0.06);
  --color-blue-border: rgba(37, 99, 235, 0.25);

  /* Font Families */
  --font-display: 'Outfit', sans-serif;
  --font-body: 'Inter', sans-serif;
  --font-mono: 'JetBrains Mono', monospace;

  /* Transitions */
  --transition-smooth: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

/* ==========================================================================
   Basic Resets & Base Styles
   ========================================================================== */

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-body);
  background-color: var(--bg-base);
  color: var(--text-primary);
  line-height: 1.75;
  min-height: 100vh;
  overflow-x: hidden;
  position: relative;
}

body::before, body::after {
  content: '';
  position: absolute;
  width: 500px;
  height: 500px;
  border-radius: 50%;
  filter: blur(160px);
  z-index: -1;
  opacity: 0.12;
  pointer-events: none;
}
body::before {
  top: 5%;
  left: -150px;
  background: var(--accent-teal);
}
body::after {
  bottom: 20%;
  right: -150px;
  background: var(--accent-purple);
}

a {
  color: var(--accent-teal);
  text-decoration: none;
  transition: var(--transition-smooth);
}
a:hover {
  color: var(--accent-indigo);
}

strong {
  color: var(--text-primary);
  font-weight: 600;
}

hr {
  border: 0;
  border-top: 1px solid var(--border);
  margin: 2.5rem 0;
}

/* ==========================================================================
   Header & Navigation
   ========================================================================== */

.hero {
  background: linear-gradient(135deg, #f8fafc 0%, #edf8f6 50%, #f1f5f9 100%);
  padding: 80px 48px 60px;
  border-bottom: 1px solid var(--border-accent);
  position: relative;
  overflow: hidden;
}

.back-link {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  color: var(--text-muted);
  font-size: 0.85rem;
  font-weight: 600;
  margin-bottom: 2rem;
  transition: var(--transition-smooth);
}
.back-link:hover {
  color: var(--accent-teal);
  transform: translateX(-2px);
}

.eyebrow, .meta-pill-container {
  display: flex;
  flex-wrap: wrap;
  gap: 0.6rem;
  margin-bottom: 1.5rem;
}

.tag, .meta-pill {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  padding: 0.35rem 0.9rem;
  border-radius: 20px;
  font-size: 0.72rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--text-secondary);
  box-shadow: 0 2px 6px rgba(0, 0, 0, 0.01);
}

.tag-teal { background: var(--accent-teal-glow); border-color: var(--accent-teal-border); color: var(--accent-teal); }
.tag-amber { background: var(--color-amber-glow); border-color: var(--color-amber-border); color: var(--color-amber); }
.tag-purple { background: var(--accent-purple-glow); border-color: var(--accent-purple-border); color: var(--accent-purple); }
.tag-blue { background: var(--color-blue-glow); border-color: var(--color-blue-border); color: var(--color-blue); }
.tag-green { background: var(--color-green-glow); border-color: var(--color-green-border); color: var(--color-green); }
.tag-orange { background: var(--accent-orange-glow); border-color: var(--accent-orange-border); color: var(--accent-orange); }

.meta-pill .dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--accent-teal);
  box-shadow: 0 0 6px var(--accent-teal);
}
.meta-pill.working-group .dot {
  background: var(--accent-purple);
  box-shadow: 0 0 6px var(--accent-purple);
}

h1 {
  font-family: var(--font-display);
  font-size: clamp(2rem, 4.5vw, 3.2rem);
  font-weight: 800;
  line-height: 1.15;
  letter-spacing: -0.02em;
  color: var(--text-primary);
  margin-bottom: 1rem;
}
h1 em, h1 span {
  font-style: normal;
  background: linear-gradient(135deg, var(--accent-teal), var(--accent-indigo));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-sub, .hero-subtitle, .subtitle {
  font-family: var(--font-display);
  font-size: clamp(1.05rem, 2vw, 1.25rem);
  color: var(--text-secondary);
  font-weight: 400;
  max-width: 850px;
  margin-bottom: 2rem;
  line-height: 1.55;
}

.hero-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 24px;
  border-top: 1px solid var(--border);
  padding-top: 20px;
  margin-top: 20px;
}
.meta-item {
  font-size: 0.8rem;
  color: var(--text-muted);
  display: flex;
  align-items: center;
  gap: 8px;
}
.meta-item strong {
  color: var(--text-secondary);
}
.meta-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--accent-teal);
}

/* KPIs / Stats in Hero */
.hero-kpis {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  margin-top: 2rem;
}
.kpi, .hero-kpi {
  background: var(--bg-card);
  border: 1px solid var(--border-accent);
  border-radius: 12px;
  padding: 14px 22px;
  min-width: 140px;
  box-shadow: 0 2px 8px rgba(15, 23, 42, 0.02);
}
.kpi-v, .hero-kpi-value {
  font-size: 1.65rem;
  font-weight: 800;
  font-family: var(--font-mono);
  background: linear-gradient(135deg, var(--accent-teal), var(--accent-indigo));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
.kpi-l, .hero-kpi-label {
  font-size: 0.68rem;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin-top: 4px;
}

/* Sticky Navigation */
nav {
  background: rgba(241, 245, 249, 0.85);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--border);
  padding: 0 48px;
  position: sticky;
  top: 0;
  z-index: 100;
  box-shadow: 0 2px 8px rgba(15, 23, 42, 0.02);
}
.nav-inner {
  display: flex;
  overflow-x: auto;
  scrollbar-width: none;
}
.nav-inner::-webkit-scrollbar {
  display: none;
}
.nav-inner a, .nav-inner button {
  color: var(--text-muted);
  text-decoration: none;
  font-size: 0.8rem;
  font-weight: 600;
  padding: 16px 20px;
  border: none;
  background: transparent;
  border-bottom: 2px solid transparent;
  white-space: nowrap;
  cursor: pointer;
  transition: var(--transition-smooth);
}
.nav-inner a:hover, .nav-inner button:hover {
  color: var(--text-primary);
  border-bottom-color: var(--border-accent);
}
.nav-inner a.active, .nav-inner button.active {
  color: var(--accent-teal);
  border-bottom-color: var(--accent-teal);
}

/* ==========================================================================
   Tabs Layout System
   ========================================================================== */

.nav-tabs {
  display: flex;
  overflow-x: auto;
  gap: 0.4rem;
  padding: 0.35rem;
  background: rgba(241, 245, 249, 0.85);
  backdrop-filter: blur(8px);
  border: 1px solid var(--border);
  border-radius: 12px;
  margin-bottom: 2.5rem;
  box-shadow: 0 4px 20px rgba(15, 23, 42, 0.01);
  scrollbar-width: none;
}
.nav-tabs::-webkit-scrollbar {
  display: none;
}
.tab-btn {
  background: transparent;
  border: none;
  color: var(--text-muted);
  padding: 0.85rem 1.35rem;
  font-family: var(--font-display);
  font-size: 0.9rem;
  font-weight: 600;
  cursor: pointer;
  border-radius: 8px;
  white-space: nowrap;
  transition: var(--transition-smooth);
}
.tab-btn:hover {
  color: var(--text-primary);
  background: rgba(0, 0, 0, 0.02);
}
.tab-btn.active {
  color: white;
  background: var(--accent-teal);
  box-shadow: 0 4px 12px rgba(8, 145, 178, 0.15);
}
.tab-content {
  display: none;
  animation: fadeIn 0.4s ease-out forwards;
}
.tab-content.active {
  display: block;
}

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(8px); }
  to { opacity: 1; transform: translateY(0); }
}

/* ==========================================================================
   Containers, Sections, & Grid Layouts
   ========================================================================== */

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 48px;
}

.section, .section-anchor {
  padding: 70px 0;
  border-bottom: 1px solid var(--border);
}
.section:last-of-type, .section-anchor:last-of-type {
  border-bottom: none;
}

.section-header {
  margin-bottom: 40px;
}
.sec-num, .section-number {
  font-size: 0.7rem;
  font-weight: 700;
  color: var(--accent-teal);
  letter-spacing: 0.15em;
  text-transform: uppercase;
  margin-bottom: 8px;
}
.sec-title, .section-title {
  font-family: var(--font-display);
  font-size: clamp(1.4rem, 3vw, 2.1rem);
  font-weight: 800;
  margin-bottom: 12px;
  letter-spacing: -0.02em;
}
.sec-desc, .section-desc {
  color: var(--text-secondary);
  font-size: 0.95rem;
  max-width: 820px;
}

/* Cards Grids */
.card-grid, .grid-2, .grid-3 {
  display: grid;
  gap: 20px;
  margin: 28px 0;
}
.card-grid {
  grid-template-columns: repeat(auto-fit, minmax(330px, 1fr));
}
.grid-2 {
  grid-template-columns: repeat(auto-fit, minmax(340px, 1fr));
}
.grid-3 {
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
}

.card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 28px;
  transition: var(--transition-smooth);
  position: relative;
  overflow: hidden;
  box-shadow: 0 4px 15px rgba(15, 23, 42, 0.01);
}
.card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 3px;
  background: linear-gradient(90deg, transparent, var(--accent-teal), transparent);
  opacity: 0;
  transition: var(--transition-smooth);
}
.card:hover {
  transform: translateY(-4px);
  border-color: rgba(8, 145, 178, 0.25);
  box-shadow: 0 12px 35px rgba(15, 23, 42, 0.04);
}
.card:hover::before {
  opacity: 1;
}

.card-title {
  font-family: var(--font-display);
  font-size: 1.1rem;
  font-weight: 700;
  margin-bottom: 12px;
  display: flex;
  align-items: center;
  gap: 10px;
  color: var(--text-primary);
}
.card-icon {
  width: 36px;
  height: 36px;
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.15rem;
  flex-shrink: 0;
}
.card p {
  font-size: 0.88rem;
  color: var(--text-secondary);
  line-height: 1.65;
}

h2 {
  font-family: var(--font-display);
  font-size: 1.5rem;
  font-weight: 700;
  margin-bottom: 1.2rem;
  display: flex;
  align-items: center;
  gap: 0.6rem;
  color: var(--text-primary);
}
h2::before {
  content: '';
  display: inline-block;
  width: 4px;
  height: 1.35rem;
  background: var(--accent-teal);
  border-radius: 3px;
}

h3 {
  font-family: var(--font-display);
  font-size: 1.15rem;
  font-weight: 700;
  margin-top: 2rem;
  margin-bottom: 10px;
  color: var(--text-primary);
}
h4 {
  font-family: var(--font-display);
  font-size: 1rem;
  font-weight: 700;
  margin-top: 1.5rem;
  margin-bottom: 8px;
  color: var(--text-primary);
}

p {
  color: var(--text-secondary);
  margin-bottom: 1rem;
  font-size: 0.92rem;
  line-height: 1.7;
}

/* ==========================================================================
   Alerts & Notifications
   ========================================================================== */

.alert {
  padding: 18px 22px;
  border-radius: 12px;
  margin: 24px 0;
  display: flex;
  gap: 16px;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.01);
  align-items: flex-start;
}
.alert-teal, .alert-info {
  background: var(--accent-teal-glow);
  border-left: 4px solid var(--accent-teal);
  border-top: 1px solid var(--accent-teal-border);
  border-right: 1px solid var(--accent-teal-border);
  border-bottom: 1px solid var(--accent-teal-border);
}
.alert-amber, .alert-warning {
  background: var(--color-amber-glow);
  border-left: 4px solid var(--color-amber);
  border-top: 1px solid var(--color-amber-border);
  border-right: 1px solid var(--color-amber-border);
  border-bottom: 1px solid var(--color-amber-border);
}
.alert-red, .alert-danger {
  background: var(--color-red-glow);
  border-left: 4px solid var(--color-red);
  border-top: 1px solid var(--color-red-border);
  border-right: 1px solid var(--color-red-border);
  border-bottom: 1px solid var(--color-red-border);
}
.alert-green, .alert-success {
  background: var(--color-green-glow);
  border-left: 4px solid var(--color-green);
  border-top: 1px solid var(--color-green-border);
  border-right: 1px solid var(--color-green-border);
  border-bottom: 1px solid var(--color-green-border);
}
.alert-blue {
  background: var(--color-blue-glow);
  border-left: 4px solid var(--color-blue);
  border-top: 1px solid var(--color-blue-border);
  border-right: 1px solid var(--color-blue-border);
  border-bottom: 1px solid var(--color-blue-border);
}
.alert-icon {
  font-size: 1.25rem;
  flex-shrink: 0;
}
.alert-content {
  flex: 1;
}
.alert-title {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 0.92rem;
  margin-bottom: 5px;
  color: var(--text-primary);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}
.alert-text {
  font-size: 0.86rem;
  color: var(--text-secondary);
  line-height: 1.65;
}

/* ==========================================================================
   Tables Style
   ========================================================================== */

.tw, .table-wrapper {
  overflow-x: auto;
  border-radius: 12px;
  border: 1px solid var(--border);
  margin: 28px 0;
  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.01);
}
table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.83rem;
  text-align: left;
}
thead tr {
  background: rgba(8, 145, 178, 0.04);
  border-bottom: 1px solid var(--border);
}
th {
  padding: 14px 16px;
  font-weight: 700;
  color: var(--accent-teal);
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
}
td {
  padding: 12px 16px;
  border-top: 1px solid var(--border);
  color: var(--text-secondary);
  vertical-align: middle;
  line-height: 1.6;
}
tr:hover td {
  background: rgba(15, 23, 42, 0.01);
}
td strong {
  color: var(--text-primary);
}
td code {
  font-family: var(--font-mono);
  background: var(--accent-teal-glow);
  color: var(--accent-teal);
  padding: 2px 6px;
  border-radius: 4px;
  font-size: 0.76rem;
  border: 1px solid var(--accent-teal-border);
}

/* ==========================================================================
   Math, Diagrams & Lists
   ========================================================================== */

.math-block {
  background: var(--bg-secondary);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 24px;
  margin: 24px 0;
  font-family: var(--font-mono);
  color: var(--accent-teal);
  text-align: center;
  font-size: 1.1rem;
  position: relative;
  box-shadow: inset 0 2px 8px rgba(15, 23, 42, 0.02);
}
.math-label {
  position: absolute;
  top: 6px;
  left: 12px;
  font-size: 0.65rem;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  font-family: var(--font-body);
}
.math-explanation {
  font-family: var(--font-body);
  color: var(--text-secondary);
  font-size: 0.85rem;
  margin-top: 14px;
  text-align: left;
  line-height: 1.6;
  border-top: 1px solid rgba(0, 0, 0, 0.05);
  padding-top: 10px;
}

.diagram-box {
  background: var(--bg-secondary);
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 32px;
  margin: 32px 0;
  box-shadow: 0 4px 12px rgba(15, 23, 42, 0.01);
}
.diagram-title {
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--accent-teal);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin-bottom: 26px;
  padding-bottom: 14px;
  border-bottom: 1px solid var(--border);
}

pre {
  font-family: var(--font-mono);
  background: #f1f5f9;
  color: #0e7490;
  padding: 20px;
  border-radius: 10px;
  overflow-x: auto;
  font-size: 0.82rem;
  line-height: 1.5;
  margin: 20px 0;
  border: 1px solid #cbd5e1;
}

code {
  font-family: var(--font-mono);
  background: var(--bg-secondary);
  color: var(--accent-teal);
  padding: 2px 6px;
  border-radius: 4px;
  font-size: 0.88em;
}

/* Bullet lists */
ul {
  margin-bottom: 20px;
  padding-left: 20px;
}
li {
  color: var(--text-secondary);
  font-size: 0.9rem;
  margin-bottom: 8px;
}
ol {
  margin-bottom: 20px;
  padding-left: 20px;
}
ol li {
  margin-bottom: 10px;
}

ul.styled, ul.styled-list {
  list-style: none;
  padding-left: 0;
}
ul.styled li, ul.styled-list li {
  padding: 6px 0 6px 22px;
  position: relative;
  font-size: 0.88rem;
  color: var(--text-secondary);
  line-height: 1.6;
}
ul.styled li::before, ul.styled-list li::before {
  content: '▸';
  position: absolute;
  left: 0;
  color: var(--accent-teal);
  font-size: 0.75rem;
  top: 7px;
}

ul.check {
  list-style: none;
  padding-left: 0;
}
ul.check li {
  padding: 8px 0 8px 26px;
  position: relative;
  font-size: 0.86rem;
  color: var(--text-secondary);
  border-bottom: 1px solid rgba(15, 23, 42, 0.05);
  line-height: 1.6;
}
ul.check li:last-child {
  border: none;
}
ul.check li::before {
  content: '✓';
  position: absolute;
  left: 0;
  color: var(--color-green);
  font-weight: 700;
}

/* ==========================================================================
   Specialized Component Utilities
   ========================================================================== */

/* OEM Interoperability Cards */
.oem-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 1.2rem;
  margin: 20px 0;
}
.oem-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 1.5rem;
  cursor: pointer;
  transition: var(--transition-smooth);
}
.oem-card:hover {
  border-color: var(--accent-teal);
  box-shadow: 0 4px 18px var(--accent-teal-glow);
  transform: scale(1.02);
}
.oem-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 0.8rem;
}
.oem-name {
  font-family: var(--font-display);
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--text-primary);
}
.oem-status {
  font-size: 0.7rem;
  padding: 0.2rem 0.6rem;
  border-radius: 12px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}
.oem-status.active {
  background: var(--color-green-glow);
  color: var(--color-green);
  border: 1px solid var(--color-green-border);
}
.oem-status.pending {
  background: var(--color-amber-glow);
  color: var(--color-amber);
  border: 1px solid var(--color-amber-border);
}
.oem-desc {
  font-size: 0.85rem;
  color: var(--text-secondary);
  margin-bottom: 0.8rem;
}
.oem-detail {
  border-top: 1px solid var(--border);
  padding-top: 0.8rem;
  font-size: 0.8rem;
  color: var(--text-muted);
  display: none;
}
.oem-card.expanded .oem-detail {
  display: block;
}

/* Losses Interactive Visualizer & Calculator */
.losses-visualizer {
  background: var(--bg-secondary);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 1.8rem;
  margin-top: 1.5rem;
}
.loss-bars {
  display: flex;
  flex-direction: column;
  gap: 1.2rem;
  margin-top: 1rem;
}
.loss-item {
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
}
.loss-labels {
  display: flex;
  justify-content: space-between;
  font-size: 0.85rem;
  color: var(--text-secondary);
}
.progress-container {
  height: 10px;
  background: rgba(15, 23, 42, 0.06);
  border-radius: 5px;
  overflow: hidden;
}
.progress-fill {
  height: 100%;
  border-radius: 5px;
  width: 0;
  transition: width 1s ease-out;
}
.progress-fill.tech {
  background: var(--accent-teal);
  box-shadow: 0 0 8px rgba(8, 145, 178, 0.3);
}
.progress-fill.non-tech {
  background: var(--accent-purple);
  box-shadow: 0 0 8px rgba(124, 58, 237, 0.3);
}

.interactive-calculator {
  margin-top: 1.5rem;
  padding: 1.25rem;
  background: var(--bg-card);
  border-radius: 8px;
  border: 1px solid var(--border);
  box-shadow: 0 2px 10px rgba(0,0,0,0.01);
}
.slider-row {
  margin: 1rem 0;
}
.slider-row label {
  display: flex;
  justify-content: space-between;
  font-size: 0.85rem;
  margin-bottom: 0.4rem;
  color: var(--text-secondary);
}
input[type="range"] {
  width: 100%;
  accent-color: var(--accent-teal);
  cursor: pointer;
}
.status-evaluator {
  font-weight: 700;
  font-size: 0.95rem;
  text-align: center;
  padding: 0.65rem;
  border-radius: 6px;
  margin-top: 1rem;
  transition: var(--transition-smooth);
}
.status-evaluator.compliant {
  background: var(--color-green-glow);
  color: var(--color-green);
  border: 1px solid var(--color-green-border);
}
.status-evaluator.non-compliant {
  background: var(--color-orange-glow);
  color: var(--accent-orange);
  border: 1px solid var(--accent-orange-border);
}

/* Timeline */
.timeline {
  position: relative;
  padding-left: 2rem;
  border-left: 2px dashed var(--border);
  margin: 1.5rem 0;
}
.timeline-item {
  position: relative;
  margin-bottom: 2rem;
}
.timeline-item::before {
  content: '';
  position: absolute;
  left: calc(-2rem - 6px);
  top: 5px;
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--accent-teal);
  box-shadow: 0 0 6px var(--accent-teal-glow);
  border: 2px solid var(--bg-base);
}
.timeline-item.completed::before {
  background: var(--color-green);
  box-shadow: 0 0 6px rgba(22, 163, 74, 0.3);
}
.timeline-title {
  font-family: var(--font-display);
  font-size: 1.05rem;
  font-weight: 700;
  margin-bottom: 0.4rem;
  color: var(--text-primary);
}
.timeline-desc {
  font-size: 0.85rem;
  color: var(--text-secondary);
}

/* Budget Cards */
.budget-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 1.2rem;
  margin-top: 1.5rem;
}
.budget-card {
  background: var(--bg-secondary);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 1.5rem 1.25rem;
  text-align: center;
  transition: var(--transition-smooth);
}
.budget-card:hover {
  border-color: rgba(124, 58, 237, 0.3);
  transform: translateY(-2px);
}
.budget-value {
  font-family: var(--font-display);
  font-size: 1.8rem;
  font-weight: 800;
  margin: 0.5rem 0;
  background: linear-gradient(135deg, var(--text-primary) 40%, var(--accent-purple) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

/* Stat Rows */
.stat-row {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(130px, 1fr));
  gap: 16px;
  margin: 24px 0;
}
.stat-item {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 16px;
  text-align: center;
  box-shadow: 0 2px 8px rgba(15, 23, 42, 0.02);
}
.stat-value {
  font-size: 1.6rem;
  font-weight: 800;
  font-family: var(--font-mono);
  background: linear-gradient(135deg, var(--accent-orange), var(--color-red));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
.stat-label {
  font-size: 0.7rem;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin-top: 4px;
}

/* Compare Grids */
.compare-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
  margin: 24px 0;
}
.compare-col {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 12px;
  overflow: hidden;
}
.compare-header {
  padding: 14px 20px;
  font-weight: 700;
  font-size: 0.9rem;
  display: flex;
  align-items: center;
  gap: 8px;
}
.compare-header.bad {
  background: rgba(220, 38, 38, 0.05);
  color: var(--color-red);
  border-bottom: 1px solid var(--color-red-border);
}
.compare-header.good {
  background: var(--color-green-glow);
  color: var(--color-green);
  border-bottom: 1px solid var(--color-green-border);
}
.compare-list {
  padding: 16px 20px;
}
.compare-item {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  padding: 8px 0;
  border-bottom: 1px solid var(--border);
  font-size: 0.85rem;
  color: var(--text-secondary);
}
.compare-item:last-child {
  border-bottom: none;
}
.ci-icon {
  flex-shrink: 0;
  font-size: 1rem;
}

/* Financial Tables */
.fin-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 10px 0;
  border-bottom: 1px solid var(--border);
  font-size: 0.87rem;
}
.fin-row:last-child {
  border-bottom: none;
}
.fin-label {
  color: var(--text-secondary);
}
.fin-value {
  font-weight: 700;
  font-family: var(--font-mono);
  color: var(--text-primary);
}
.fin-total {
  display: flex;
  justify-content: space-between;
  padding: 16px 0;
  border-top: 2px solid var(--accent-teal);
  margin-top: 8px;
  font-weight: 800;
  color: var(--accent-teal);
  font-size: 1rem;
}

/* Roadmap Phase Cards */
.roadmap-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 20px;
  margin: 28px 0;
}
.phase-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 14px;
  overflow: hidden;
}
.phase-header {
  padding: 16px 20px;
  display: flex;
  align-items: center;
  gap: 10px;
}
.phase-num {
  width: 32px;
  height: 32px;
  border-radius: 8px;
  background: linear-gradient(135deg, var(--accent-teal), var(--accent-indigo));
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 800;
  font-size: 0.85rem;
  color: white;
  flex-shrink: 0;
}
.phase-body {
  padding: 16px 20px;
}

/* Partner row */
.partner-row {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  margin: 24px 0;
}
.partner-chip {
  background: var(--bg-card);
  border: 1px solid var(--border-accent);
  border-radius: 8px;
  padding: 10px 18px;
  font-size: 0.82rem;
  font-weight: 600;
  color: var(--text-secondary);
  display: flex;
  align-items: center;
  gap: 7px;
  transition: var(--transition-smooth);
}
.partner-chip:hover {
  border-color: var(--accent-teal);
  color: var(--accent-teal);
}

.sdg-row {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin: 16px 0;
}
.sdg-tag {
  padding: 6px 14px;
  border-radius: 6px;
  font-size: 0.75rem;
  font-weight: 700;
  border: 1px solid;
}

/* Contact Grid */
.contact-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 14px;
  margin: 20px 0;
}
.contact-card {
  background: var(--bg-card);
  border: 1px solid var(--border-accent);
  border-radius: 10px;
  padding: 16px 18px;
}
.contact-org {
  font-weight: 700;
  font-size: 0.9rem;
  margin-bottom: 4px;
}
.contact-url {
  font-size: 0.8rem;
  color: var(--accent-teal);
  text-decoration: none;
}
.contact-url:hover {
  text-decoration: underline;
}
.contact-meta {
  font-size: 0.78rem;
  color: var(--text-muted);
  margin-top: 3px;
}

/* ==========================================================================
   Footer
   ========================================================================== */

footer {
  background: var(--bg-secondary);
  border-top: 1px solid var(--border);
  padding: 48px 40px;
  text-align: center;
  color: var(--text-muted);
  font-size: 0.82rem;
}
footer strong {
  color: var(--accent-teal);
}

/* ==========================================================================
   Responsive & Print Stylesheets
   ========================================================================== */

@media(max-width: 768px) {
  .hero {
    padding: 50px 24px 40px;
  }
  nav {
    padding: 0 24px;
  }
  .container {
    padding: 0 24px;
  }
  .compare-grid {
    grid-template-columns: 1fr;
  }
  .section {
    padding: 50px 0;
  }
  .oem-grid {
    grid-template-columns: 1fr;
  }
  .region-grid {
    grid-template-columns: 1fr;
  }
}

@media print {
  body {
    background: white;
    color: black;
    font-size: 11pt;
  }
  body::before, body::after {
    display: none !important;
  }
  .back-link, nav, .nav-tabs, .interactive-calculator, .slider-row, .tab-btn {
    display: none !important;
  }
  .container {
    max-width: 100% !important;
    padding: 0 !important;
  }
  .tab-content {
    display: block !important;
    opacity: 1 !important;
    page-break-inside: avoid;
    margin-bottom: 40px;
  }
  .card, .oem-card, .budget-card, .stat-item, .compare-col, .phase-card {
    background: white !important;
    border: 1px solid #aaa !important;
    box-shadow: none !important;
    page-break-inside: avoid;
  }
  th {
    color: black !important;
    border-bottom: 2px solid black !important;
  }
  td {
    color: #222 !important;
  }
  h1, h2, h3, h4 {
    color: black !important;
    background: none !important;
    -webkit-text-fill-color: initial !important;
    page-break-after: avoid;
  }
  p {
    color: #111 !important;
  }
  .oem-detail {
    display: block !important;
  }
}