/* ==========================================================================
   Birchrock Training and Development (BirchrockTD) Design System
   Earthy Birch Trees, Exposed Root Network & Geological Bedrock Theme
   Hosting the ChangeStart Agentic AI Suite
   ========================================================================== */

:root {
  /* Earthy Woodland, Birch Bark & Bedrock Palette */
  --birch-dark: #0c120e;
  --birch-darker: #070b09;
  --birch-slate: #131b16;
  --birch-loam: #181512;
  --birch-bedrock: #1e2822;

  --birch-card: rgba(18, 27, 22, 0.86);
  --birch-card-hover: rgba(26, 39, 31, 0.95);
  --birch-border: rgba(143, 163, 130, 0.18);
  --birch-border-glow: rgba(74, 222, 128, 0.35);

  /* Plant & Forest Greens */
  --birch-moss: #3e7d58;
  --birch-moss-dark: #274c36;
  --birch-emerald-bright: #4ade80;
  --birch-leaf-light: #86efac;
  --birch-emerald-glow: rgba(74, 222, 128, 0.22);
  
  --birch-stream-teal: #2dd4bf;
  --birch-teal-glow: rgba(45, 212, 191, 0.22);

  /* Earthy Root & Wood Tones */
  --birch-root-amber: #c49a6c;
  --birch-root-golden: #dfad76;
  --birch-root-deep: #8c5a2b;
  --birch-root-glow: rgba(196, 154, 108, 0.25);

  /* Birch Paper Bark & Parchment */
  --birch-bark-white: #fbf9f4;
  --birch-bark-cream: #f3eee4;
  --birch-bark-parchment: #e8dfcf;

  /* Typography Colors */
  --birch-text-primary: #fbf9f4;
  --birch-text-secondary: #a3b2a8;
  --birch-text-muted: #728378;

  --birch-font-heading: 'Outfit', sans-serif;
  --birch-font-body: 'Plus Jakarta Sans', sans-serif;

  --birch-nav-height: 76px;
  --birch-radius-sm: 8px;
  --birch-radius-md: 14px;
  --birch-radius-lg: 22px;
  --birch-radius-xl: 30px;

  --birch-transition: all 0.25s cubic-bezier(0.16, 1, 0.3, 1);
}

/* ================= Top Announcement Bar ================= */
.birch-top-bar {
  background: linear-gradient(90deg, rgba(62, 125, 88, 0.28) 0%, rgba(196, 154, 108, 0.25) 50%, rgba(45, 212, 191, 0.22) 100%);
  border-bottom: 1px solid rgba(143, 163, 130, 0.16);
  color: var(--birch-bark-cream);
  font-size: 0.82rem;
  font-weight: 500;
  padding: 8px 16px;
  text-align: center;
  position: relative;
  z-index: 1000;
  backdrop-filter: blur(10px);
}

.birch-top-bar a {
  color: var(--birch-emerald-bright);
  text-decoration: underline;
  text-underline-offset: 3px;
  margin-left: 8px;
  font-weight: 600;
  transition: var(--birch-transition);
}

.birch-top-bar a:hover {
  color: #fff;
}

/* ================= Global Navigation ================= */
.birch-navbar {
  position: sticky;
  top: 0;
  z-index: 999;
  background: rgba(12, 18, 14, 0.88);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--birch-border);
  height: var(--birch-nav-height);
  transition: var(--birch-transition);
}

.birch-nav-container {
  max-width: 1440px;
  margin: 0 auto;
  height: 100%;
  padding: 0 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
}

.birch-brand-link {
  display: flex;
  align-items: center;
  gap: 12px;
  text-decoration: none;
  color: inherit;
  flex-shrink: 0;
}

.birch-brand-avatar {
  width: 48px;
  height: 48px;
  border-radius: 50%;
  object-fit: cover;
  border: 2px solid var(--birch-root-amber);
  box-shadow: 0 0 16px var(--birch-root-glow);
  background: #0f1612;
}

.birch-brand-titles {
  display: flex;
  flex-direction: column;
}

.birch-brand-name {
  font-family: var(--birch-font-heading);
  font-weight: 800;
  font-size: 1.35rem;
  letter-spacing: -0.5px;
  color: var(--birch-bark-white);
  line-height: 1.1;
  display: flex;
  align-items: center;
  gap: 6px;
}

.birch-brand-name span.accent {
  background: linear-gradient(135deg, var(--birch-emerald-bright), var(--birch-root-golden));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.birch-brand-subtitle {
  font-size: 0.72rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 1.2px;
  color: var(--birch-text-secondary);
}

.birch-nav-menu {
  display: flex;
  align-items: center;
  gap: 4px;
  list-style: none;
}

.birch-nav-item a {
  display: inline-block;
  padding: 8px 12px;
  color: var(--birch-text-secondary);
  font-size: 0.86rem;
  font-weight: 500;
  text-decoration: none;
  border-radius: var(--birch-radius-sm);
  transition: var(--birch-transition);
}

.birch-nav-item a:hover,
.birch-nav-item a.active {
  color: #fff;
  background: rgba(62, 125, 88, 0.16);
  border: 1px solid rgba(143, 163, 130, 0.2);
}

.birch-nav-item a.highlight {
  color: var(--birch-emerald-bright);
  font-weight: 600;
}

.birch-nav-actions {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-shrink: 0;
}

.birch-btn-ghost {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  padding: 8px 14px;
  border-radius: var(--birch-radius-sm);
  border: 1px solid var(--birch-border);
  background: rgba(255, 255, 255, 0.04);
  color: var(--birch-bark-cream);
  font-size: 0.84rem;
  font-weight: 600;
  text-decoration: none;
  cursor: pointer;
  transition: var(--birch-transition);
}

.birch-btn-ghost:hover {
  background: rgba(62, 125, 88, 0.15);
  border-color: rgba(74, 222, 128, 0.35);
  color: #fff;
}

.birch-btn-primary {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 9px 18px;
  border-radius: var(--birch-radius-sm);
  background: linear-gradient(135deg, var(--birch-moss), #234731);
  border: 1px solid rgba(74, 222, 128, 0.35);
  color: var(--birch-bark-white);
  font-size: 0.86rem;
  font-weight: 700;
  text-decoration: none;
  cursor: pointer;
  box-shadow: 0 4px 14px var(--birch-emerald-glow);
  transition: var(--birch-transition);
}

.birch-btn-primary:hover {
  background: linear-gradient(135deg, #448960, var(--birch-moss));
  transform: translateY(-1px);
  box-shadow: 0 6px 20px rgba(74, 222, 128, 0.35);
}

.birch-btn-amber {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 9px 18px;
  border-radius: var(--birch-radius-sm);
  background: linear-gradient(135deg, var(--birch-root-amber), #9e6d3c);
  color: #fff;
  font-size: 0.86rem;
  font-weight: 700;
  text-decoration: none;
  border: none;
  cursor: pointer;
  box-shadow: 0 4px 14px var(--birch-root-glow);
  transition: var(--birch-transition);
}

.birch-btn-amber:hover {
  background: linear-gradient(135deg, var(--birch-root-golden), var(--birch-root-amber));
  transform: translateY(-1px);
  box-shadow: 0 6px 20px rgba(196, 154, 108, 0.4);
}

/* Mobile Toggle */
.birch-mobile-toggle {
  display: none;
  background: transparent;
  border: 1px solid var(--birch-border);
  color: #fff;
  padding: 8px;
  border-radius: var(--birch-radius-sm);
  cursor: pointer;
}

/* ================= Root Network Wave Graphic ================= */
.birch-root-wave {
  width: 100%;
  height: 38px;
  display: block;
  color: rgba(143, 163, 130, 0.15);
  overflow: visible;
}

/* ================= Hero Section ================= */
.birch-hero {
  position: relative;
  padding: 70px 24px 50px;
  max-width: 1440px;
  margin: 0 auto;
  overflow: hidden;
}

.birch-hero-glow {
  position: absolute;
  top: -120px;
  right: 15%;
  width: 550px;
  height: 550px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(74, 222, 128, 0.12) 0%, rgba(196, 154, 108, 0.08) 50%, transparent 70%);
  pointer-events: none;
  filter: blur(70px);
  z-index: 0;
}

.birch-hero-grid {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 48px;
  align-items: center;
  position: relative;
  z-index: 1;
}

.birch-hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: rgba(62, 125, 88, 0.18);
  border: 1px solid rgba(74, 222, 128, 0.35);
  padding: 6px 14px;
  border-radius: 9999px;
  font-size: 0.78rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 1px;
  color: var(--birch-emerald-bright);
  margin-bottom: 20px;
}

.birch-hero-badge .pulse-dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--birch-emerald-bright);
  box-shadow: 0 0 10px var(--birch-emerald-bright);
  animation: pulseDot 2s infinite ease-in-out;
}

@keyframes pulseDot {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.4; transform: scale(0.85); }
}

.birch-hero h1 {
  font-family: var(--birch-font-heading);
  font-size: 3.3rem;
  font-weight: 800;
  line-height: 1.14;
  letter-spacing: -1.2px;
  color: var(--birch-bark-white);
  margin-bottom: 22px;
}

.birch-hero h1 span.gradient-text {
  background: linear-gradient(135deg, #ffffff 25%, var(--birch-emerald-bright) 70%, var(--birch-root-golden) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.birch-hero-desc {
  font-size: 1.1rem;
  line-height: 1.7;
  color: #d1dcce;
  margin-bottom: 32px;
  max-width: 630px;
}

.birch-hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin-bottom: 38px;
}

.birch-hero-stats {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 18px;
  padding-top: 26px;
  border-top: 1px solid var(--birch-border);
}

.birch-stat-item {
  display: flex;
  flex-direction: column;
}

.birch-stat-num {
  font-family: var(--birch-font-heading);
  font-size: 1.9rem;
  font-weight: 800;
  color: var(--birch-bark-white);
  line-height: 1;
}

.birch-stat-num span.accent {
  color: var(--birch-emerald-bright);
}

.birch-stat-num span.amber {
  color: var(--birch-root-golden);
}

.birch-stat-label {
  font-size: 0.76rem;
  color: var(--birch-text-secondary);
  margin-top: 6px;
  line-height: 1.35;
}

/* Hero Media Showcase */
.birch-hero-media-wrap {
  position: relative;
}

.birch-hero-media-frame {
  position: relative;
  background: var(--birch-card);
  border: 1px solid rgba(143, 163, 130, 0.25);
  border-radius: var(--birch-radius-lg);
  overflow: hidden;
  box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.8), 0 0 35px rgba(62, 125, 88, 0.2);
  transition: var(--birch-transition);
}

.birch-hero-media-frame:hover {
  transform: translateY(-4px) scale(1.01);
  box-shadow: 0 30px 60px -12px rgba(0, 0, 0, 0.85), 0 0 45px rgba(196, 154, 108, 0.3);
}

.birch-hero-img {
  width: 100%;
  height: auto;
  display: block;
  object-fit: cover;
}

.birch-floating-tag {
  position: absolute;
  background: rgba(12, 18, 14, 0.92);
  backdrop-filter: blur(14px);
  border: 1px solid rgba(143, 163, 130, 0.25);
  border-radius: var(--birch-radius-md);
  padding: 10px 14px;
  display: flex;
  align-items: center;
  gap: 10px;
  box-shadow: 0 10px 25px rgba(0, 0, 0, 0.6);
  z-index: 2;
  transition: var(--birch-transition);
}

.birch-floating-tag.tag-top {
  top: -16px;
  right: -16px;
}

.birch-floating-tag.tag-bottom {
  bottom: -18px;
  left: -16px;
}

.birch-tag-icon {
  width: 34px;
  height: 34px;
  border-radius: 8px;
  background: rgba(62, 125, 88, 0.24);
  color: var(--birch-emerald-bright);
  display: flex;
  align-items: center;
  justify-content: center;
}

.birch-tag-text strong {
  display: block;
  font-size: 0.82rem;
  color: var(--birch-bark-white);
}

.birch-tag-text span {
  font-size: 0.72rem;
  color: var(--birch-text-secondary);
}

/* ================= Trust Logos Banner ================= */
.birch-trust-bar {
  background: rgba(18, 26, 21, 0.6);
  border-top: 1px solid var(--birch-border);
  border-bottom: 1px solid var(--birch-border);
  padding: 24px 0;
  margin-top: 20px;
}

.birch-trust-container {
  max-width: 1440px;
  margin: 0 auto;
  padding: 0 24px;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}

.birch-trust-title {
  font-size: 0.8rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 1.2px;
  color: var(--birch-text-muted);
}

.birch-trust-pills {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.birch-trust-pill {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid var(--birch-border);
  border-radius: 9999px;
  padding: 6px 14px;
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--birch-bark-cream);
}

.birch-trust-pill svg {
  color: var(--birch-emerald-bright);
}

/* ================= Section Headers ================= */
.birch-section {
  padding: 90px 24px;
  max-width: 1440px;
  margin: 0 auto;
  position: relative;
}

.birch-section-header {
  text-align: center;
  max-width: 820px;
  margin: 0 auto 54px;
}

.birch-section-tag {
  display: inline-block;
  font-size: 0.78rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 1.4px;
  color: var(--birch-emerald-bright);
  background: rgba(62, 125, 88, 0.16);
  border: 1px solid rgba(74, 222, 128, 0.3);
  padding: 5px 14px;
  border-radius: 9999px;
  margin-bottom: 14px;
}

.birch-section-title {
  font-family: var(--birch-font-heading);
  font-size: 2.5rem;
  font-weight: 800;
  letter-spacing: -0.8px;
  color: var(--birch-bark-white);
  line-height: 1.2;
  margin-bottom: 16px;
}

.birch-section-desc {
  font-size: 1.05rem;
  color: var(--birch-text-secondary);
  line-height: 1.68;
}

/* ================= The Roots & Bedrock Change Framework ================= */
.birch-roots-model-wrap {
  background: linear-gradient(180deg, rgba(18, 28, 22, 0.9) 0%, rgba(13, 19, 15, 0.95) 100%);
  border: 1px solid var(--birch-border);
  border-radius: var(--birch-radius-xl);
  padding: 40px;
  margin: 40px 0;
  box-shadow: 0 20px 40px rgba(0, 0, 0, 0.5);
  position: relative;
  overflow: hidden;
}

.birch-roots-model-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
  position: relative;
  z-index: 1;
}

.birch-roots-model-tier {
  background: rgba(10, 16, 12, 0.7);
  border: 1px solid rgba(143, 163, 130, 0.15);
  border-radius: var(--birch-radius-md);
  padding: 24px;
  display: flex;
  flex-direction: column;
  transition: var(--birch-transition);
}

.birch-roots-model-tier:hover {
  border-color: rgba(74, 222, 128, 0.35);
  transform: translateY(-3px);
  box-shadow: 0 10px 25px rgba(0, 0, 0, 0.4);
}

.birch-roots-model-tier.tier-canopy {
  border-top: 3px solid var(--birch-emerald-bright);
}

.birch-roots-model-tier.tier-trunk {
  border-top: 3px solid var(--birch-bark-cream);
}

.birch-roots-model-tier.tier-roots {
  border-top: 3px solid var(--birch-root-amber);
}

.birch-roots-model-tier.tier-bedrock {
  border-top: 3px solid #6b7280;
}

.birch-tier-badge {
  font-size: 0.72rem;
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: 0.8px;
  margin-bottom: 8px;
}

.tier-canopy .birch-tier-badge { color: var(--birch-emerald-bright); }
.tier-trunk .birch-tier-badge { color: var(--birch-bark-cream); }
.tier-roots .birch-tier-badge { color: var(--birch-root-golden); }
.tier-bedrock .birch-tier-badge { color: #9ca3af; }

.birch-roots-model-tier h4 {
  font-family: var(--birch-font-heading);
  font-size: 1.2rem;
  font-weight: 700;
  color: var(--birch-bark-white);
  margin-bottom: 10px;
}

.birch-roots-model-tier p {
  font-size: 0.86rem;
  color: var(--birch-text-secondary);
  line-height: 1.55;
  margin-bottom: 14px;
  flex-grow: 1;
}

/* ================= ChangeStart Solution Showcase ================= */
.birch-solution-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  margin-bottom: 48px;
}

.birch-card {
  background: var(--birch-card);
  backdrop-filter: blur(14px);
  border: 1px solid var(--birch-border);
  border-radius: var(--birch-radius-lg);
  padding: 28px;
  display: flex;
  flex-direction: column;
  transition: var(--birch-transition);
  position: relative;
  overflow: hidden;
}

.birch-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 2px;
  background: linear-gradient(90deg, transparent, rgba(74, 222, 128, 0.6), transparent);
  opacity: 0;
  transition: var(--birch-transition);
}

.birch-card:hover {
  background: var(--birch-card-hover);
  border-color: rgba(74, 222, 128, 0.3);
  transform: translateY(-4px);
  box-shadow: 0 20px 40px -10px rgba(0, 0, 0, 0.6), 0 0 25px rgba(62, 125, 88, 0.15);
}

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

.birch-card-icon {
  width: 50px;
  height: 50px;
  border-radius: var(--birch-radius-md);
  background: rgba(62, 125, 88, 0.2);
  border: 1px solid rgba(74, 222, 128, 0.3);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--birch-emerald-bright);
  margin-bottom: 20px;
}

.birch-card-icon.amber {
  background: rgba(196, 154, 108, 0.2);
  border-color: rgba(196, 154, 108, 0.35);
  color: var(--birch-root-golden);
}

.birch-card-icon.teal {
  background: rgba(45, 212, 191, 0.18);
  border-color: rgba(45, 212, 191, 0.3);
  color: var(--birch-stream-teal);
}

.birch-card h3 {
  font-family: var(--birch-font-heading);
  font-size: 1.35rem;
  font-weight: 700;
  color: var(--birch-bark-white);
  margin-bottom: 12px;
}

.birch-card p {
  font-size: 0.92rem;
  color: var(--birch-text-secondary);
  line-height: 1.6;
  margin-bottom: 18px;
  flex-grow: 1;
}

.birch-feature-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 8px;
  font-size: 0.84rem;
  color: #cbd5e1;
  border-top: 1px solid var(--birch-border);
  padding-top: 14px;
}

.birch-feature-list li {
  display: flex;
  align-items: center;
  gap: 8px;
}

.birch-feature-list li svg {
  color: var(--birch-emerald-bright);
  flex-shrink: 0;
}

/* ================= The 5-Agent Architecture Deck ================= */
.birch-agent-pipeline {
  display: flex;
  flex-direction: column;
  gap: 20px;
  background: rgba(18, 27, 22, 0.7);
  border: 1px solid var(--birch-border);
  border-radius: var(--birch-radius-xl);
  padding: 36px;
  margin-bottom: 48px;
}

.birch-agent-row {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 16px;
  position: relative;
}

.birch-agent-card {
  background: rgba(12, 18, 14, 0.88);
  border: 1px solid var(--birch-border);
  border-radius: var(--birch-radius-md);
  padding: 20px;
  display: flex;
  flex-direction: column;
  position: relative;
  transition: var(--birch-transition);
}

.birch-agent-card:hover {
  border-color: var(--birch-border-glow);
  transform: translateY(-3px);
  box-shadow: 0 10px 25px rgba(0, 0, 0, 0.5);
}

.birch-agent-num {
  font-size: 0.72rem;
  font-weight: 800;
  color: var(--birch-emerald-bright);
  text-transform: uppercase;
  margin-bottom: 6px;
}

.birch-agent-card h4 {
  font-family: var(--birch-font-heading);
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--birch-bark-white);
  margin-bottom: 8px;
  line-height: 1.25;
}

.birch-agent-role {
  font-size: 0.78rem;
  color: var(--birch-text-secondary);
  line-height: 1.45;
  margin-bottom: 14px;
  flex-grow: 1;
}

.birch-agent-badge {
  font-size: 0.7rem;
  font-weight: 600;
  padding: 4px 8px;
  border-radius: var(--birch-radius-sm);
  background: rgba(255, 255, 255, 0.05);
  color: var(--birch-bark-cream);
  display: inline-block;
  text-align: center;
}

/* ================= Live ChangeStart Host Studio Section ================= */
.birch-live-studio-wrap {
  position: relative;
  margin: 40px 0;
}

.birch-studio-header-bar {
  background: linear-gradient(90deg, #131c16 0%, #17241c 100%);
  border: 1px solid var(--birch-border);
  border-top-left-radius: var(--birch-radius-lg);
  border-top-right-radius: var(--birch-radius-lg);
  padding: 16px 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  flex-wrap: wrap;
}

.birch-studio-title {
  display: flex;
  align-items: center;
  gap: 12px;
}

.birch-studio-title h3 {
  font-family: var(--birch-font-heading);
  font-size: 1.18rem;
  font-weight: 700;
  color: var(--birch-bark-white);
  margin: 0;
}

.birch-studio-controls {
  display: flex;
  align-items: center;
  gap: 10px;
}

.birch-studio-container {
  background: #0c120e;
  border: 1px solid var(--birch-border);
  border-top: none;
  border-bottom-left-radius: var(--birch-radius-lg);
  border-bottom-right-radius: var(--birch-radius-lg);
  padding: 24px;
  box-shadow: 0 30px 60px rgba(0, 0, 0, 0.7);
}

/* Fullscreen Studio Mode */
body.workspace-full-mode .birch-top-bar,
body.workspace-full-mode .birch-hero,
body.workspace-full-mode .birch-trust-bar,
body.workspace-full-mode #about,
body.workspace-full-mode #solution,
body.workspace-full-mode #roots-model,
body.workspace-full-mode #services,
body.workspace-full-mode #training,
body.workspace-full-mode #casestudy,
body.workspace-full-mode #agentcards,
body.workspace-full-mode #calculator,
body.workspace-full-mode #resources,
body.workspace-full-mode #contact,
body.workspace-full-mode .birch-footer {
  display: none !important;
}

body.workspace-full-mode .birch-live-studio-wrap {
  margin: 0;
}

body.workspace-full-mode .birch-studio-container {
  border-radius: 0;
  border: none;
  min-height: calc(100vh - var(--birch-nav-height));
  padding: 24px;
}

/* ================= Services & Advisory ================= */
.birch-services-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 28px;
}

.birch-service-box {
  background: var(--birch-card);
  border: 1px solid var(--birch-border);
  border-radius: var(--birch-radius-lg);
  padding: 32px;
  display: flex;
  gap: 20px;
  transition: var(--birch-transition);
}

.birch-service-box:hover {
  background: var(--birch-card-hover);
  border-color: rgba(74, 222, 128, 0.35);
  transform: translateY(-4px);
  box-shadow: 0 16px 32px -8px rgba(0, 0, 0, 0.6);
}

.birch-service-icon {
  width: 56px;
  height: 56px;
  border-radius: var(--birch-radius-md);
  background: rgba(62, 125, 88, 0.22);
  border: 1px solid rgba(74, 222, 128, 0.3);
  color: var(--birch-emerald-bright);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.birch-service-content h3 {
  font-family: var(--birch-font-heading);
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--birch-bark-white);
  margin-bottom: 8px;
}

.birch-service-content p {
  font-size: 0.9rem;
  color: var(--birch-text-secondary);
  line-height: 1.6;
  margin-bottom: 14px;
}

/* ================= Training Programs ================= */
.birch-training-layout {
  display: grid;
  grid-template-columns: 0.95fr 1.05fr;
  gap: 40px;
  align-items: center;
  margin-bottom: 40px;
}

.birch-training-image-wrap {
  position: relative;
  border-radius: var(--birch-radius-lg);
  overflow: hidden;
  border: 1px solid var(--birch-border);
  box-shadow: 0 20px 40px rgba(0, 0, 0, 0.7);
}

.birch-training-image {
  width: 100%;
  height: auto;
  display: block;
}

.birch-training-courses {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.birch-course-card {
  background: var(--birch-card);
  border: 1px solid var(--birch-border);
  border-radius: var(--birch-radius-md);
  padding: 20px 24px;
  transition: var(--birch-transition);
  cursor: pointer;
}

.birch-course-card:hover,
.birch-course-card.active {
  background: var(--birch-card-hover);
  border-color: rgba(74, 222, 128, 0.38);
  box-shadow: 0 10px 25px rgba(0, 0, 0, 0.4);
}

.birch-course-meta {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 6px;
}

.birch-course-badge {
  font-size: 0.72rem;
  font-weight: 700;
  color: var(--birch-emerald-bright);
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.birch-course-duration {
  font-size: 0.74rem;
  color: var(--birch-text-muted);
}

.birch-course-card h4 {
  font-family: var(--birch-font-heading);
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--birch-bark-white);
  margin-bottom: 6px;
}

.birch-course-card p {
  font-size: 0.86rem;
  color: var(--birch-text-secondary);
  line-height: 1.5;
  margin: 0;
}

/* ================= Case Study: Northpaw ================= */
.birch-casestudy-card {
  background: linear-gradient(135deg, rgba(18, 27, 22, 0.95) 0%, rgba(24, 34, 28, 0.95) 100%);
  border: 1px solid rgba(74, 222, 128, 0.28);
  border-radius: var(--birch-radius-xl);
  padding: 44px;
  box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.7), 0 0 40px rgba(62, 125, 88, 0.12);
}

.birch-casestudy-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 40px;
}

.birch-casestudy-header {
  margin-bottom: 20px;
}

.birch-casestudy-header h3 {
  font-family: var(--birch-font-heading);
  font-size: 2rem;
  font-weight: 800;
  color: var(--birch-bark-white);
  margin-top: 8px;
  line-height: 1.2;
}

.birch-casestudy-metrics {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 14px;
  margin: 24px 0;
}

.birch-cs-metric {
  background: rgba(0, 0, 0, 0.45);
  border: 1px solid var(--birch-border);
  border-radius: var(--birch-radius-sm);
  padding: 14px;
  text-align: center;
}

.birch-cs-metric strong {
  display: block;
  font-family: var(--birch-font-heading);
  font-size: 1.5rem;
  color: var(--birch-emerald-bright);
}

.birch-cs-metric span {
  font-size: 0.74rem;
  color: var(--birch-text-secondary);
}

.birch-cs-waves {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.birch-cs-wave-item {
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid var(--birch-border);
  border-radius: var(--birch-radius-md);
  padding: 14px 18px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.birch-cs-wave-left {
  display: flex;
  align-items: center;
  gap: 12px;
}

.birch-cs-wave-pill {
  font-size: 0.72rem;
  font-weight: 700;
  padding: 4px 10px;
  border-radius: 9999px;
}

.birch-cs-wave-pill.go {
  background: rgba(74, 222, 128, 0.16);
  color: var(--birch-emerald-bright);
}

.birch-cs-wave-pill.hold {
  background: rgba(196, 154, 108, 0.18);
  color: var(--birch-root-golden);
}

/* ================= ROI & Analyst Hours Calculator ================= */
.birch-calc-wrap {
  background: var(--birch-card);
  border: 1px solid var(--birch-border);
  border-radius: var(--birch-radius-xl);
  padding: 40px;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 48px;
  align-items: center;
}

.birch-calc-inputs {
  display: flex;
  flex-direction: column;
  gap: 24px;
}

.birch-calc-field {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.birch-calc-label-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.birch-calc-label {
  font-size: 0.88rem;
  font-weight: 600;
  color: var(--birch-bark-white);
}

.birch-calc-val {
  font-family: var(--birch-font-heading);
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--birch-emerald-bright);
}

.birch-slider {
  width: 100%;
  accent-color: var(--birch-moss);
  cursor: pointer;
}

.birch-calc-results {
  background: linear-gradient(135deg, rgba(62, 125, 88, 0.15) 0%, rgba(196, 154, 108, 0.12) 100%);
  border: 1px solid rgba(74, 222, 128, 0.3);
  border-radius: var(--birch-radius-lg);
  padding: 32px;
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.birch-calc-stat-block {
  display: flex;
  flex-direction: column;
}

.birch-calc-stat-num {
  font-family: var(--birch-font-heading);
  font-size: 2.8rem;
  font-weight: 800;
  line-height: 1;
  color: var(--birch-bark-white);
}

.birch-calc-stat-num.highlight {
  background: linear-gradient(135deg, var(--birch-emerald-bright), var(--birch-root-golden));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.birch-calc-stat-desc {
  font-size: 0.84rem;
  color: var(--birch-text-secondary);
  margin-top: 6px;
}

/* ================= Resource Library ================= */
.birch-resources-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
}

.birch-resource-card {
  background: var(--birch-card);
  border: 1px solid var(--birch-border);
  border-radius: var(--birch-radius-lg);
  padding: 24px;
  display: flex;
  flex-direction: column;
  transition: var(--birch-transition);
}

.birch-resource-card:hover {
  background: var(--birch-card-hover);
  border-color: rgba(74, 222, 128, 0.35);
  transform: translateY(-4px);
}

.birch-resource-type {
  font-size: 0.72rem;
  font-weight: 700;
  text-transform: uppercase;
  color: var(--birch-emerald-bright);
  margin-bottom: 8px;
}

.birch-resource-card h4 {
  font-family: var(--birch-font-heading);
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--birch-bark-white);
  margin-bottom: 8px;
  line-height: 1.3;
}

.birch-resource-card p {
  font-size: 0.82rem;
  color: var(--birch-text-secondary);
  line-height: 1.5;
  margin-bottom: 18px;
  flex-grow: 1;
}

/* ================= Contact & FAQ ================= */
.birch-contact-layout {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 40px;
}

.birch-contact-form-wrap {
  background: var(--birch-card);
  border: 1px solid var(--birch-border);
  border-radius: var(--birch-radius-xl);
  padding: 36px;
}

.birch-form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
  margin-bottom: 16px;
}

.birch-form-group {
  display: flex;
  flex-direction: column;
  gap: 6px;
  margin-bottom: 16px;
}

.birch-form-label {
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--birch-bark-cream);
}

.birch-form-input,
.birch-form-select,
.birch-form-textarea {
  background: rgba(0, 0, 0, 0.4);
  border: 1px solid var(--birch-border);
  border-radius: var(--birch-radius-sm);
  padding: 10px 14px;
  color: #fff;
  font-family: var(--birch-font-body);
  font-size: 0.88rem;
  transition: var(--birch-transition);
}

.birch-form-input:focus,
.birch-form-select:focus,
.birch-form-textarea:focus {
  outline: none;
  border-color: var(--birch-emerald-bright);
  box-shadow: 0 0 0 3px var(--birch-emerald-glow);
}

.birch-faq-list {
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.birch-faq-item {
  background: var(--birch-card);
  border: 1px solid var(--birch-border);
  border-radius: var(--birch-radius-md);
  overflow: hidden;
  transition: var(--birch-transition);
}

.birch-faq-question {
  padding: 16px 20px;
  font-weight: 700;
  font-size: 0.94rem;
  color: var(--birch-bark-white);
  cursor: pointer;
  display: flex;
  justify-content: space-between;
  align-items: center;
  user-select: none;
}

.birch-faq-question svg {
  color: var(--birch-emerald-bright);
  transition: transform 0.25s ease;
}

.birch-faq-item.open .birch-faq-question svg {
  transform: rotate(180deg);
}

.birch-faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.3s ease;
  font-size: 0.86rem;
  color: var(--birch-text-secondary);
  line-height: 1.6;
  padding: 0 20px;
}

.birch-faq-item.open .birch-faq-answer {
  max-height: 300px;
  padding-bottom: 18px;
}

/* ================= Footer ================= */
.birch-footer {
  background: var(--birch-darker);
  border-top: 1px solid var(--birch-border);
  padding: 60px 24px 30px;
  margin-top: 60px;
  position: relative;
}

.birch-footer-container {
  max-width: 1440px;
  margin: 0 auto;
}

.birch-footer-grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr 1fr;
  gap: 40px;
  margin-bottom: 40px;
}

.birch-footer-brand {
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.birch-footer-col h5 {
  font-family: var(--birch-font-heading);
  font-size: 0.96rem;
  font-weight: 700;
  color: var(--birch-bark-white);
  margin-bottom: 16px;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.birch-footer-links {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 10px;
  font-size: 0.85rem;
}

.birch-footer-links a {
  color: var(--birch-text-secondary);
  text-decoration: none;
  transition: var(--birch-transition);
}

.birch-footer-links a:hover {
  color: var(--birch-emerald-bright);
}

.birch-footer-bottom {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding-top: 24px;
  border-top: 1px solid var(--birch-border);
  font-size: 0.78rem;
  color: var(--birch-text-muted);
  flex-wrap: wrap;
  gap: 14px;
}

/* ================= Responsive Adjustments ================= */
@media (max-width: 1100px) {
  .birch-hero h1 { font-size: 2.7rem; }
  .birch-hero-grid { grid-template-columns: 1fr; gap: 36px; }
  .birch-roots-model-grid { grid-template-columns: 1fr 1fr; }
  .birch-solution-grid { grid-template-columns: 1fr 1fr; }
  .birch-agent-row { grid-template-columns: 1fr 1fr 1fr; }
  .birch-training-layout { grid-template-columns: 1fr; }
  .birch-casestudy-grid { grid-template-columns: 1fr; }
  .birch-calc-wrap { grid-template-columns: 1fr; }
  .birch-resources-grid { grid-template-columns: 1fr 1fr; }
  .birch-contact-layout { grid-template-columns: 1fr; }
  .birch-footer-grid { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 800px) {
  .birch-nav-menu { display: none; }
  .birch-mobile-toggle { display: block; }
  .birch-roots-model-grid { grid-template-columns: 1fr; }
  .birch-solution-grid { grid-template-columns: 1fr; }
  .birch-services-grid { grid-template-columns: 1fr; }
  .birch-agent-row { grid-template-columns: 1fr; }
  .birch-hero-stats { grid-template-columns: 1fr 1fr; }
  .birch-resources-grid { grid-template-columns: 1fr; }
  .birch-form-row { grid-template-columns: 1fr; }
  .birch-footer-grid { grid-template-columns: 1fr; }
}

/* ================= Cloudflare D1 Database Explorer Modal ================= */
.d1-modal-overlay {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(7, 11, 9, 0.88);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  z-index: 10000;
  display: none;
  align-items: center;
  justify-content: center;
  padding: 20px;
  animation: fadeIn 0.25s ease;
}

.d1-modal-overlay.active {
  display: flex;
}

.d1-modal-dialog {
  background: rgba(18, 27, 22, 0.98);
  border: 1px solid var(--birch-emerald-bright);
  border-radius: var(--birch-radius-lg);
  box-shadow: 0 25px 60px rgba(0, 0, 0, 0.75), 0 0 30px rgba(74, 222, 128, 0.15);
  width: 100%;
  max-width: 980px;
  max-height: 88vh;
  display: flex;
  flex-direction: column;
  overflow: hidden;
  animation: modalSlideUp 0.3s cubic-bezier(0.16, 1, 0.3, 1);
}

@keyframes modalSlideUp {
  from { opacity: 0; transform: translateY(20px) scale(0.98); }
  to { opacity: 1; transform: translateY(0) scale(1); }
}

.d1-modal-header {
  padding: 18px 24px;
  background: rgba(12, 18, 14, 0.95);
  border-bottom: 1px solid var(--birch-border);
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.d1-modal-title {
  display: flex;
  align-items: center;
  gap: 12px;
}

.d1-modal-title h3 {
  font-family: var(--birch-font-heading);
  color: var(--birch-bark-white);
  font-size: 1.25rem;
  margin: 0;
}

.d1-modal-close-btn {
  background: rgba(255, 255, 255, 0.08);
  border: 1px solid rgba(255, 255, 255, 0.15);
  color: #fff;
  border-radius: var(--birch-radius-sm);
  width: 32px;
  height: 32px;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  font-size: 1.1rem;
  transition: var(--birch-transition);
}

.d1-modal-close-btn:hover {
  background: rgba(239, 68, 68, 0.25);
  border-color: #ef4444;
  color: #ef4444;
}

.d1-modal-body {
  padding: 20px 24px;
  overflow-y: auto;
  flex: 1;
}

.d1-tab-bar {
  display: flex;
  gap: 8px;
  border-bottom: 1px solid var(--birch-border);
  margin-bottom: 18px;
}

.d1-tab-btn {
  background: transparent;
  border: none;
  border-bottom: 2px solid transparent;
  color: var(--birch-text-secondary);
  padding: 10px 16px;
  font-size: 0.88rem;
  font-weight: 600;
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: 8px;
  transition: var(--birch-transition);
}

.d1-tab-btn:hover {
  color: var(--birch-bark-white);
}

.d1-tab-btn.active {
  color: var(--birch-emerald-bright);
  border-bottom-color: var(--birch-emerald-bright);
}

.d1-tab-count {
  font-size: 0.72rem;
  padding: 2px 7px;
  border-radius: 9999px;
  background: rgba(74, 222, 128, 0.18);
  color: #4ade80;
  font-weight: 700;
}

.d1-data-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.84rem;
  text-align: left;
}

.d1-data-table th {
  background: rgba(12, 18, 14, 0.8);
  color: var(--birch-bark-parchment);
  padding: 10px 14px;
  border: 1px solid var(--birch-border);
  font-weight: 600;
}

.d1-data-table td {
  padding: 10px 14px;
  border: 1px solid var(--birch-border);
  color: #cbd5e1;
}

.d1-data-table tr:nth-child(even) td {
  background: rgba(255, 255, 255, 0.02);
}

.d1-data-table tr:hover td {
  background: rgba(74, 222, 128, 0.05);
}

.d1-modal-footer {
  padding: 14px 24px;
  background: rgba(12, 18, 14, 0.95);
  border-top: 1px solid var(--birch-border);
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 12px;
}