/* ==========================================================================
   Usama Rehman — Portfolio Stylesheet (Vanilla CSS, Zero Build Step)
   Palette:
   1. Alabaster Zinc       #F6F7F9  (Dominant 60% neutral canvas)
   2. Pure Crisp White     #FFFFFF  (Elevated 30% structural surface)
   3. Deep Obsidian Slate  #111318  (Primary ink — 16.4:1 contrast)
   4. Muted Graphite       #525866  (Secondary prose — 6.6:1 contrast)
   5. International Cobalt #1D4ED8  (Focal 10% action accent — 6.8:1 contrast)
   6. Signal Amber         #B45309  (Editorial [TODO] markers & warnings)
   ========================================================================== */

:root {
  --canvas: #F6F7F9;
  --surface: #FFFFFF;
  --surface-subtle: #EDF0F5;
  --ink: #111318;
  --ink-muted: #525866;
  --border: #DCE1E9;
  --border-strong: #C2CAD6;
  --accent: #1D4ED8;
  --accent-hover: #1E40AF;
  --accent-soft: #EFF4FF;
  --accent-ink: #FFFFFF;
  --todo-bg: #FEF3C7;
  --todo-border: #F59E0B;
  --todo-ink: #92400E;
  --success-bg: #ECFDF5;
  --success-ink: #065F46;
  --danger-bg: #FEF2F2;
  --danger-ink: #991B1B;
  --code-bg: #111318;
  --code-ink: #F1F3F7;

  --font-display: 'Bricolage Grotesque', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --font-body: 'Plus Jakarta Sans', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --font-mono: 'JetBrains Mono', ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;

  /* Deliberate Modular Type Scale */
  --step--1: 0.8125rem; /* 13px */
  --step-0: 1rem;       /* 16px */
  --step-1: 1.125rem;   /* 18px */
  --step-2: 1.375rem;   /* 22px */
  --step-3: 1.75rem;    /* 28px */
  --step-4: clamp(1.85rem, 2.8vw, 2.35rem);
  --step-5: clamp(2.1rem, 3.2vw, 2.85rem);

  --container-max: 1200px;
  --radius-outer: 12px;
  --radius-inner: 8px;
  --radius-control: 6px;
  --ease-out: cubic-bezier(0.16, 1, 0.3, 1);
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --canvas: #0B0D11;
    --surface: #131720;
    --surface-subtle: #1A202C;
    --ink: #F1F3F7;
    --ink-muted: #98A2B3;
    --border: #242B38;
    --border-strong: #343E50;
    --accent: #3B82F6;
    --accent-hover: #60A5FA;
    --accent-soft: #172554;
    --accent-ink: #0B0D11;
    --todo-bg: #2E1F05;
    --todo-border: #D97706;
    --todo-ink: #FCD34D;
    --success-bg: #062E22;
    --success-ink: #6EE7B7;
    --danger-bg: #311014;
    --danger-ink: #FCA5A5;
    --code-bg: #07090C;
    --code-ink: #E2E8F0;
  }
}

:root[data-theme="dark"] {
  --canvas: #0B0D11;
  --surface: #131720;
  --surface-subtle: #1A202C;
  --ink: #F1F3F7;
  --ink-muted: #98A2B3;
  --border: #242B38;
  --border-strong: #343E50;
  --accent: #3B82F6;
  --accent-hover: #60A5FA;
  --accent-soft: #172554;
  --accent-ink: #0B0D11;
  --todo-bg: #2E1F05;
  --todo-border: #D97706;
  --todo-ink: #FCD34D;
  --success-bg: #062E22;
  --success-ink: #6EE7B7;
  --danger-bg: #311014;
  --danger-ink: #FCA5A5;
  --code-bg: #07090C;
  --code-ink: #E2E8F0;
}

/* Base Reset & Accessibility */
*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  background-color: var(--canvas);
  color: var(--ink);
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

body {
  margin: 0;
  background-color: var(--canvas);
  color: var(--ink);
  overflow-x: hidden;
}

img,
svg {
  display: block;
  max-width: 100%;
  height: auto;
}

/* Keyboard Focus Visibility */
:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 3px;
}

.skip-link {
  position: absolute;
  top: -100px;
  left: 16px;
  z-index: 999;
  background: var(--accent);
  color: #FFFFFF;
  padding: 10px 16px;
  border-radius: var(--radius-control);
  font-weight: 600;
  text-decoration: none;
}

.skip-link:focus {
  top: 12px;
}

/* Typography & Measure Discipline (< 80ch) */
h1, h2, h3, h4 {
  font-family: var(--font-display);
  color: var(--ink);
  margin: 0;
  line-height: 1.14;
  letter-spacing: -0.025em;
  text-wrap: balance;
}

p {
  margin: 0;
  max-width: 66ch;
  color: var(--ink-muted);
}

.tabular-nums {
  font-variant-numeric: tabular-nums;
}

.mono {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
}

.todo-marker {
  display: inline;
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  color: var(--todo-ink);
  background-color: var(--todo-bg);
  border-bottom: 1px dashed var(--todo-border);
  padding: 1px 5px;
}

/* Layout Containers */
.container {
  width: 100%;
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 24px;
}

@media (max-width: 640px) {
  .container {
    padding: 0 16px;
  }
}

.section {
  padding: 88px 0;
  border-bottom: 1px solid var(--border);
}

@media (max-width: 768px) {
  .section {
    padding: 56px 0;
  }
}

.section-header {
  display: flex;
  flex-direction: column;
  gap: 12px;
  margin-bottom: 44px;
}

.section-title {
  font-size: var(--step-4);
  font-weight: 700;
}

.section-lead {
  font-size: var(--step-1);
  color: var(--ink-muted);
  max-width: 64ch;
}

/* ==========================================================================
   Top Navigation Bar (Strict 3-Zone Contract)
   Zone 1: Single wordmark | Zone 2: 5 single-line nav links | Zone 3: 1 CTA
   ========================================================================== */
.site-header {
  position: sticky;
  top: 0;
  z-index: 40;
  background-color: var(--canvas);
  border-bottom: 1px solid var(--border);
  height: 64px;
  display: flex;
  align-items: center;
}

.site-header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 32px;
  width: 100%;
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 24px;
}

.brand-wordmark {
  font-family: var(--font-display);
  font-size: 1.125rem;
  font-weight: 700;
  color: var(--ink);
  text-decoration: none;
  white-space: nowrap;
  flex-shrink: 0;
  letter-spacing: -0.02em;
}

.primary-nav {
  display: flex;
  align-items: center;
  gap: 28px;
}

.primary-nav__link {
  font-size: 0.9375rem;
  font-weight: 500;
  color: var(--ink-muted);
  text-decoration: none;
  white-space: nowrap;
  flex-shrink: 0;
  padding: 4px 0;
  border-bottom: 2px solid transparent;
  transition: color 150ms var(--ease-out), border-color 150ms var(--ease-out);
}

.primary-nav__link:hover {
  color: var(--ink);
  border-bottom-color: var(--ink);
}

.header-cta {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 9px 18px;
  font-size: 0.875rem;
  font-weight: 600;
  color: #FFFFFF;
  background-color: var(--accent);
  border-radius: var(--radius-control);
  text-decoration: none;
  white-space: nowrap;
  flex-shrink: 0;
  transition: background-color 150ms var(--ease-out), transform 150ms var(--ease-out);
}

.header-cta:hover {
  background-color: var(--accent-hover);
}

@media (max-width: 820px) {
  .site-header__inner {
    gap: 12px;
    padding: 0 16px;
  }
  .primary-nav {
    gap: 14px;
    overflow-x: auto;
    scrollbar-width: none;
  }
  .primary-nav::-webkit-scrollbar {
    display: none;
  }
  .primary-nav__link {
    font-size: 0.8125rem;
  }
  .header-cta {
    padding: 8px 12px;
    font-size: 0.8125rem;
  }
}

@media (max-width: 520px) {
  .primary-nav {
    display: none;
  }
}

/* ==========================================================================
   Buttons & Interactive Controls
   ========================================================================== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  min-height: 44px;
  padding: 10px 20px;
  font-family: var(--font-body);
  font-size: 0.9375rem;
  font-weight: 600;
  border-radius: var(--radius-control);
  border: 1px solid transparent;
  cursor: pointer;
  text-decoration: none;
  white-space: nowrap;
  flex-shrink: 0;
  transition: background-color 160ms var(--ease-out), border-color 160ms var(--ease-out), color 160ms var(--ease-out), transform 160ms var(--ease-out);
}

.btn--primary {
  background-color: var(--accent);
  color: #FFFFFF;
}

.btn--primary:hover {
  background-color: var(--accent-hover);
}

.btn--secondary {
  background-color: var(--surface);
  color: var(--ink);
  border-color: var(--border-strong);
}

.btn--secondary:hover {
  background-color: var(--surface-subtle);
}

.btn--full {
  width: 100%;
}

/* ==========================================================================
   Hero Section & Interactive Shopify Theme Section Workbench
   ========================================================================== */
.hero {
  padding: 64px 0 72px;
  border-bottom: 1px solid var(--border);
}

.hero-grid {
  display: grid;
  grid-template-columns: 11fr 13fr;
  gap: 40px;
  align-items: start;
}

@media (max-width: 1024px) {
  .hero-grid {
    grid-template-columns: 1fr;
    gap: 36px;
  }
}

.hero-intro {
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  gap: 28px;
}

.hero-location {
  font-size: 0.9375rem;
  color: var(--ink-muted);
  margin-bottom: 12px;
}

.hero-title {
  font-size: var(--step-5);
  font-weight: 700;
  margin-bottom: 20px;
}

.hero-lead {
  font-size: var(--step-1);
  color: var(--ink-muted);
  line-height: 1.65;
  margin-bottom: 28px;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.hero-stack-note {
  padding-top: 24px;
  border-top: 1px solid var(--border);
  font-size: 0.875rem;
  color: var(--ink-muted);
}

.hero-stack-note strong {
  color: var(--ink);
  font-weight: 600;
}

/* Single Orchestrated Page-Load Moment: The Live Shopify Workbench */
@keyframes workbenchEntrance {
  from {
    opacity: 0;
    transform: translateY(12px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.workbench {
  background-color: var(--surface);
  border: 1px solid var(--border-strong);
  border-radius: var(--radius-outer);
  overflow: hidden;
  display: flex;
  flex-direction: column;
  animation: workbenchEntrance 480ms var(--ease-out) both;
}

.workbench-topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 12px 18px;
  background-color: var(--surface-subtle);
  border-bottom: 1px solid var(--border);
  flex-wrap: wrap;
}

.workbench-title {
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  font-weight: 600;
  color: var(--ink);
}

.workbench-tabs {
  display: flex;
  align-items: center;
  gap: 4px;
  background-color: var(--canvas);
  padding: 3px;
  border-radius: var(--radius-control);
  border: 1px solid var(--border);
}

.workbench-tab {
  font-family: var(--font-body);
  font-size: 0.75rem;
  font-weight: 600;
  padding: 5px 10px;
  border-radius: 4px;
  border: none;
  background: transparent;
  color: var(--ink-muted);
  cursor: pointer;
  white-space: nowrap;
  transition: background-color 140ms var(--ease-out), color 140ms var(--ease-out);
}

.workbench-tab[aria-selected="true"] {
  background-color: var(--surface);
  color: var(--ink);
  box-shadow: 0 1px 2px rgba(0, 0, 0, 0.06);
}

.workbench-body {
  display: grid;
  grid-template-columns: 230px 1fr;
  min-height: 460px;
}

@media (max-width: 680px) {
  .workbench-body {
    grid-template-columns: 1fr;
  }
}

/* Left Sidebar: Theme Editor Controls */
.schema-controls {
  padding: 18px;
  border-right: 1px solid var(--border);
  background-color: var(--canvas);
  display: flex;
  flex-direction: column;
  gap: 16px;
}

@media (max-width: 680px) {
  .schema-controls {
    border-right: none;
    border-bottom: 1px solid var(--border);
  }
}

.schema-group {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.schema-label {
  font-size: 0.8125rem;
  font-weight: 600;
  color: var(--ink);
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.schema-select,
.schema-input {
  width: 100%;
  min-height: 38px;
  padding: 6px 10px;
  font-family: var(--font-body);
  font-size: 0.8125rem;
  color: var(--ink);
  background-color: var(--surface);
  border: 1px solid var(--border-strong);
  border-radius: var(--radius-control);
}

.segmented-group {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 4px;
  background-color: var(--surface-subtle);
  padding: 3px;
  border-radius: var(--radius-control);
  border: 1px solid var(--border);
}

.segmented-btn {
  min-height: 34px;
  font-family: var(--font-body);
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--ink-muted);
  background: transparent;
  border: none;
  border-radius: 4px;
  cursor: pointer;
  white-space: nowrap;
}

.segmented-btn[aria-pressed="true"] {
  background-color: var(--surface);
  color: var(--ink);
}

.schema-checkbox-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
  padding: 6px 0;
  font-size: 0.8125rem;
  color: var(--ink);
  cursor: pointer;
}

.schema-checkbox-row input[type="checkbox"] {
  width: 18px;
  height: 18px;
  accent-color: var(--accent);
  cursor: pointer;
}

/* Right Stage: Live Product Section Preview */
.live-stage {
  padding: 20px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  gap: 16px;
  background-color: var(--surface);
}

.product-preview-top {
  display: grid;
  grid-template-columns: 128px 1fr;
  gap: 18px;
  align-items: start;
}

@media (max-width: 480px) {
  .product-preview-top {
    grid-template-columns: 1fr;
  }
}

.product-thumb-frame {
  border-radius: var(--radius-inner);
  overflow: hidden;
  border: 1px solid var(--border);
  background-color: var(--surface-subtle);
  aspect-ratio: 1 / 1;
}

.product-thumb-frame img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.product-meta-brand {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--ink-muted);
  margin-bottom: 4px;
}

.product-meta-title {
  font-size: 1.1875rem;
  font-weight: 700;
  margin-bottom: 6px;
}

.product-price-row {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 6px 10px;
  margin-bottom: 12px;
}

.product-price-final {
  font-family: var(--font-mono);
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--ink);
}

.product-price-compare {
  font-family: var(--font-mono);
  font-size: 0.875rem;
  color: var(--ink-muted);
  text-decoration: line-through;
}

.product-savings-note {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--accent);
  white-space: nowrap;
}

/* Selling Plan Radio Widget */
.selling-plan-box {
  display: flex;
  flex-direction: column;
  gap: 8px;
  margin-bottom: 12px;
}

.plan-option {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  padding: 10px 12px;
  border: 1px solid var(--border);
  border-radius: var(--radius-inner);
  background-color: var(--canvas);
  cursor: pointer;
  text-align: left;
  width: 100%;
  font-family: var(--font-body);
  color: var(--ink);
  transition: border-color 140ms var(--ease-out), background-color 140ms var(--ease-out);
}

.plan-option[aria-checked="true"] {
  border-color: var(--accent);
  background-color: var(--accent-soft);
}

.plan-option__left {
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.plan-option__title {
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--ink);
}

.plan-option__sub {
  font-size: 0.75rem;
  color: var(--ink-muted);
}

.plan-option__price {
  font-family: var(--font-mono);
  font-size: 0.875rem;
  font-weight: 700;
  color: var(--ink);
}

/* Product Accordion inside Hero Preview */
.preview-accordion {
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
}

.preview-accordion__trigger {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 10px 0;
  background: none;
  border: none;
  font-family: var(--font-body);
  font-size: 0.8125rem;
  font-weight: 600;
  color: var(--ink);
  cursor: pointer;
  text-align: left;
}

.preview-accordion__content {
  padding-bottom: 10px;
  font-size: 0.8125rem;
  color: var(--ink-muted);
  line-height: 1.5;
}

/* Add to Cart Action Row */
.preview-cart-Controls {
  display: grid;
  grid-template-columns: 104px 1fr;
  gap: 10px;
  align-items: center;
}

.qty-stepper {
  display: flex;
  align-items: center;
  justify-content: space-between;
  border: 1px solid var(--border-strong);
  border-radius: var(--radius-control);
  background-color: var(--canvas);
  height: 44px;
}

.qty-stepper__btn {
  width: 34px;
  height: 100%;
  border: none;
  background: transparent;
  color: var(--ink);
  font-family: var(--font-mono);
  font-size: 1rem;
  cursor: pointer;
}

.qty-stepper__val {
  font-family: var(--font-mono);
  font-size: 0.875rem;
  font-weight: 600;
}

/* Live AJAX Cart Drawer & Payload Panel */
.ajax-drawer-preview {
  padding: 14px;
  border-radius: var(--radius-inner);
  background-color: var(--canvas);
  border: 1px solid var(--border);
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.shipping-meter {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.shipping-meter__text {
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--ink);
  display: flex;
  justify-content: space-between;
}

.shipping-meter__track {
  width: 100%;
  height: 6px;
  background-color: var(--border);
  border-radius: 99px;
  overflow: hidden;
}

.shipping-meter__fill {
  height: 100%;
  background-color: var(--accent);
  transition: width 180ms var(--ease-out);
}

.cart-status-line {
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 0.8125rem;
  padding-top: 6px;
  border-top: 1px solid var(--border);
}

.cart-reset-btn {
  background: none;
  border: none;
  font-family: var(--font-body);
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--accent);
  cursor: pointer;
  padding: 4px 6px;
  white-space: nowrap;
  flex-shrink: 0;
}

.liquid-payload-pre {
  margin: 0;
  padding: 16px;
  background-color: var(--code-bg);
  color: var(--code-ink);
  font-family: var(--font-mono);
  font-size: 0.75rem;
  line-height: 1.55;
  border-radius: var(--radius-inner);
  overflow-x: auto;
}

/* Full-Width Fact Bar Below Hero Split */
.hero-fact-strip {
  margin-top: 40px;
  padding-top: 28px;
  border-top: 1px solid var(--border);
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}

@media (max-width: 820px) {
  .hero-fact-strip {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 480px) {
  .hero-fact-strip {
    grid-template-columns: 1fr;
  }
}

.fact-item__title {
  font-family: var(--font-display);
  font-size: 1rem;
  font-weight: 700;
  color: var(--ink);
  margin-bottom: 4px;
}

.fact-item__desc {
  font-size: 0.875rem;
  color: var(--ink-muted);
}

/* ==========================================================================
   Selected Work Section (Shopify First, Then Full-Stack)
   ========================================================================== */
.filter-bar {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 4px;
  background-color: var(--surface-subtle);
  border: 1px solid var(--border);
  border-radius: var(--radius-inner);
  margin-bottom: 32px;
  flex-wrap: wrap;
}

.filter-btn {
  min-height: 38px;
  padding: 6px 14px;
  font-family: var(--font-body);
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--ink-muted);
  background: transparent;
  border: none;
  border-radius: var(--radius-control);
  cursor: pointer;
  white-space: nowrap;
  transition: background-color 150ms var(--ease-out), color 150ms var(--ease-out);
}

.filter-btn[aria-pressed="true"] {
  background-color: var(--surface);
  color: var(--ink);
  box-shadow: 0 1px 2px rgba(0, 0, 0, 0.06);
}

.work-ledger {
  display: flex;
  flex-direction: column;
  border-top: 1px solid var(--border);
}

.work-row {
  display: grid;
  grid-template-columns: 2.2fr 1.2fr 3.2fr 1.4fr;
  gap: 24px;
  padding: 24px 0;
  border-bottom: 1px solid var(--border);
  align-items: baseline;
}

.work-row[hidden] {
  display: none;
}

@media (max-width: 900px) {
  .work-row {
    grid-template-columns: 1fr;
    gap: 8px;
    padding: 20px 0;
  }
}

.work-row__name {
  font-family: var(--font-display);
  font-size: var(--step-2);
  font-weight: 700;
  color: var(--ink);
}

.work-row__domain {
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  color: var(--ink-muted);
}

.work-row__summary {
  font-size: 0.9375rem;
  color: var(--ink-muted);
}

.work-row__stack {
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  color: var(--ink);
}

.work-row__action {
  justify-self: end;
}

@media (max-width: 900px) {
  .work-row__action {
    justify-self: start;
    margin-top: 6px;
  }
}

.text-link {
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--accent);
  text-decoration: underline;
  text-underline-offset: 4px;
  background: none;
  border: none;
  padding: 0;
  cursor: pointer;
  font-family: var(--font-body);
}

.text-link:hover {
  color: var(--accent-hover);
}

/* ==========================================================================
   Deep-Dive Case Studies (Top 3 Projects)
   ========================================================================== */
.case-studies-stack {
  display: flex;
  flex-direction: column;
  gap: 48px;
}

.case-study {
  background-color: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-outer);
  padding: 36px;
}

@media (max-width: 640px) {
  .case-study {
    padding: 20px;
  }
}

.case-study__top {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  justify-content: space-between;
  gap: 16px;
  padding-bottom: 24px;
  border-bottom: 1px solid var(--border);
  margin-bottom: 28px;
}

.case-study__title {
  font-size: var(--step-3);
  font-weight: 700;
}

.case-study__meta {
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  color: var(--ink-muted);
}

.case-study__visual {
  margin-bottom: 28px;
  border-radius: var(--radius-inner);
  overflow: hidden;
  border: 1px solid var(--border);
  background-color: var(--code-bg);
}

.case-study__visual-caption {
  padding: 10px 16px;
  background-color: var(--surface-subtle);
  border-top: 1px solid var(--border);
  font-size: 0.8125rem;
  color: var(--ink-muted);
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 8px;
}

.case-study__grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 28px 36px;
}

@media (max-width: 768px) {
  .case-study__grid {
    grid-template-columns: 1fr;
    gap: 20px;
  }
}

.case-block__heading {
  font-family: var(--font-display);
  font-size: 1.0625rem;
  font-weight: 700;
  color: var(--ink);
  margin-bottom: 8px;
}

.case-block__body {
  font-size: 0.9375rem;
  color: var(--ink-muted);
  line-height: 1.65;
}

/* ==========================================================================
   Services & Retainer Models
   ========================================================================== */
.services-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

@media (max-width: 900px) {
  .services-grid {
    grid-template-columns: 1fr;
  }
}

.service-panel {
  background-color: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-outer);
  padding: 28px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  gap: 24px;
}

.service-panel__title {
  font-size: var(--step-2);
  font-weight: 700;
  margin-bottom: 10px;
}

.service-panel__desc {
  font-size: 0.9375rem;
  margin-bottom: 18px;
}

.service-list {
  list-style: none;
  padding: 0;
  margin: 0;
  display: flex;
  flex-direction: column;
  gap: 10px;
  border-top: 1px solid var(--border);
  padding-top: 16px;
}

.service-list li {
  font-size: 0.875rem;
  color: var(--ink);
}

/* ==========================================================================
   Sequential Engineering Process (Steps 1 to 4)
   ========================================================================== */
.process-steps {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
  list-style: none;
  padding: 0;
  margin: 0;
}

@media (max-width: 960px) {
  .process-steps {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 560px) {
  .process-steps {
    grid-template-columns: 1fr;
  }
}

.process-step {
  padding-top: 20px;
  border-top: 2px solid var(--border-strong);
}

.process-step__num {
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  font-weight: 600;
  color: var(--accent);
  display: block;
  margin-bottom: 8px;
}

.process-step__title {
  font-size: 1.125rem;
  font-weight: 700;
  margin-bottom: 8px;
}

.process-step__desc {
  font-size: 0.9375rem;
}

/* ==========================================================================
   About & Credentials Section
   ========================================================================== */
.about-grid {
  display: grid;
  grid-template-columns: 7fr 5fr;
  gap: 48px;
  align-items: start;
}

@media (max-width: 860px) {
  .about-grid {
    grid-template-columns: 1fr;
    gap: 32px;
  }
}

.about-prose {
  display: flex;
  flex-direction: column;
  gap: 18px;
}

.about-prose p {
  font-size: 1.0625rem;
  color: var(--ink-muted);
}

.about-prose strong {
  color: var(--ink);
}

.credentials-table {
  width: 100%;
  border-collapse: collapse;
  background-color: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-outer);
  overflow: hidden;
}

.credentials-table th,
.credentials-table td {
  padding: 14px 18px;
  text-align: left;
  border-bottom: 1px solid var(--border);
  font-size: 0.875rem;
  vertical-align: top;
}

.credentials-table th {
  font-weight: 600;
  color: var(--ink-muted);
  width: 38%;
}

.credentials-table td {
  color: var(--ink);
  font-weight: 500;
}

/* ==========================================================================
   Contact Section & Working Form
   ========================================================================== */
.contact-grid {
  display: grid;
  grid-template-columns: 5fr 7fr;
  gap: 48px;
  align-items: start;
}

@media (max-width: 860px) {
  .contact-grid {
    grid-template-columns: 1fr;
    gap: 32px;
  }
}

.contact-direct-card {
  padding: 24px;
  background-color: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-outer);
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.contact-form {
  background-color: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-outer);
  padding: 32px;
  display: flex;
  flex-direction: column;
  gap: 20px;
}

@media (max-width: 640px) {
  .contact-form {
    padding: 20px;
  }
}

.form-field {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.form-field label {
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--ink);
}

.form-field input,
.form-field select,
.form-field textarea {
  width: 100%;
  padding: 10px 14px;
  font-family: var(--font-body);
  font-size: 0.9375rem;
  color: var(--ink);
  background-color: var(--canvas);
  border: 1px solid var(--border-strong);
  border-radius: var(--radius-control);
}

.form-field textarea {
  resize: vertical;
  min-height: 120px;
}

.form-field input[aria-invalid="true"],
.form-field select[aria-invalid="true"],
.form-field textarea[aria-invalid="true"] {
  border-color: var(--danger-ink);
}

.field-error {
  font-size: 0.8125rem;
  color: var(--danger-ink);
  min-height: 18px;
}

.form-feedback {
  padding: 14px 16px;
  border-radius: var(--radius-control);
  font-size: 0.875rem;
  font-weight: 500;
}

.form-feedback[hidden] {
  display: none;
}

.form-feedback--success {
  background-color: var(--success-bg);
  color: var(--success-ink);
  border: 1px solid var(--success-ink);
}

.form-feedback--error {
  background-color: var(--danger-bg);
  color: var(--danger-ink);
  border: 1px solid var(--danger-ink);
}

/* ==========================================================================
   Site Footer
   ========================================================================== */
.site-footer {
  padding: 40px 0;
  background-color: var(--canvas);
}

.site-footer__inner {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
}

.footer-links {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 20px;
}

.footer-links a {
  font-size: 0.875rem;
  color: var(--ink-muted);
  text-decoration: none;
}

.footer-links a:hover {
  color: var(--ink);
  text-decoration: underline;
}

/* Reduced Motion Compliance */
@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
}