/* ==========================================================================
   RuComplex IT (rucomplex.it) — Design System & Static Stylesheet (2026)
   Zero external CDNs · System Grotesque + Technical Mono · WCAG AA/AAA
   ========================================================================== */

:root {
  /* Surfaces */
  --bg-canvas: #F6F7F8;
  --bg-surface: #FFFFFF;
  --bg-subtle: #ECF0F3;
  --bg-dark: #111922;
  --bg-dark-raised: #18232F;

  /* Ink / Typography colors */
  --ink-primary: #111922;
  --ink-secondary: #394654;
  --ink-muted: #5A6978;
  --ink-on-dark: #F3F6F9;
  --ink-on-dark-muted: #9FB0C0;

  /* Brand Accent (evolved from original RuComplex logo) */
  --brand-primary: #006D7A;
  --brand-hover: #005560;
  --brand-active: #00424B;
  --brand-mark: #008A99;
  --brand-cyan-dark: #14D4DE;
  --brand-tint: #E5F3F5;

  /* Borders & Hairlines */
  --border-subtle: #DCE3EA;
  --border-strong: #BAC7D3;
  --border-on-dark: #253445;

  /* Explicit [ПЛЕЙСХОЛДЕР] markers */
  --placeholder-bg: #FDF8EB;
  --placeholder-border: #E0A82E;
  --placeholder-ink: #854D0E;

  /* Status */
  --ok-bg: #ECFDF5;
  --ok-border: #10B981;
  --ok-ink: #065F46;

  /* Typography */
  --font-sans: system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", "Noto Sans", "Liberation Sans", Arial, sans-serif;
  --font-mono: ui-monospace, "SFMono-Regular", "JetBrains Mono", Menlo, Monaco, Consolas, "DejaVu Sans Mono", monospace;

  --text-h1: clamp(1.875rem, 3.2vw, 2.75rem);
  --text-h2: clamp(1.5rem, 2.3vw, 2rem);
  --text-h3: clamp(1.125rem, 1.4vw, 1.3125rem);
  --text-lead: clamp(1.0625rem, 1.25vw, 1.2rem);
  --text-body: 1rem;
  --text-sm: 0.875rem;
  --text-xs: 0.78125rem;

  /* Spacing scale (4px / 8px base) */
  --space-1: 0.25rem;  /* 4px */
  --space-2: 0.5rem;   /* 8px */
  --space-3: 0.75rem;  /* 12px */
  --space-4: 1rem;     /* 16px */
  --space-5: 1.5rem;   /* 24px */
  --space-6: 2rem;     /* 32px */
  --space-7: 3rem;     /* 48px */
  --space-8: 4rem;     /* 64px */
  --space-9: 5rem;     /* 80px */

  /* Containers & Radii */
  --container-max: 1200px;
  --container-prose: 760px;
  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 14px;
  --shadow-hover: 0 8px 24px rgba(17, 25, 34, 0.06);
}

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

html {
  font-size: 16px;
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }
  *, *::before, *::after {
    transition-duration: 0.01ms !important;
    animation-duration: 0.01ms !important;
  }
}

body {
  margin: 0;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  background-color: var(--bg-canvas);
  color: var(--ink-primary);
  font-family: var(--font-sans);
  font-size: var(--text-body);
  line-height: 1.6;
  font-feature-settings: "kern" 1, "liga" 1;
  text-rendering: optimizeLegibility;
}

main {
  flex: 1 0 auto;
}

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

[hidden] {
  display: none !important;
}

/* Typography Helpers */
h1, h2, h3, h4 {
  margin: 0 0 var(--space-4);
  color: var(--ink-primary);
  font-weight: 700;
}

h1 {
  font-size: var(--text-h1);
  line-height: 1.14;
  letter-spacing: -0.025em;
}

h2 {
  font-size: var(--text-h2);
  line-height: 1.2;
  letter-spacing: -0.02em;
}

h3 {
  font-size: var(--text-h3);
  line-height: 1.3;
  letter-spacing: -0.01em;
  font-weight: 600;
}

p {
  margin: 0 0 var(--space-4);
  color: var(--ink-secondary);
}

p:last-child {
  margin-bottom: 0;
}

.lead {
  font-size: var(--text-lead);
  line-height: 1.55;
  color: var(--ink-secondary);
  max-width: 62ch;
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  font-weight: 600;
  letter-spacing: 0.03em;
  text-transform: uppercase;
  color: var(--brand-primary);
  margin-bottom: var(--space-3);
}

.eyebrow::before {
  content: "";
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background-color: var(--brand-mark);
  flex-shrink: 0;
}

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

/* Links & Interactive States */
a {
  color: var(--brand-primary);
  text-decoration: underline;
  text-decoration-thickness: 1px;
  text-underline-offset: 3px;
  text-decoration-color: rgba(0, 109, 122, 0.35);
  transition: color 0.15s ease, text-decoration-color 0.15s ease, background-color 0.15s ease, border-color 0.15s ease;
}

a:hover {
  color: var(--brand-hover);
  text-decoration-color: currentColor;
}

a:active {
  color: var(--brand-active);
}

:focus-visible {
  outline: 2px solid var(--brand-primary);
  outline-offset: 3px;
  border-radius: 3px;
}

/* Skip Link */
.skip-link {
  position: absolute;
  left: -9999px;
  top: var(--space-3);
  z-index: 200;
  padding: var(--space-2) var(--space-4);
  background: var(--ink-primary);
  color: #FFFFFF;
  font-size: var(--text-sm);
  font-weight: 600;
  border-radius: var(--radius-sm);
  text-decoration: none;
}

.skip-link:focus {
  left: var(--space-4);
  color: #FFFFFF;
}

/* Layout Containers & Sections */
.container {
  width: 100%;
  max-width: var(--container-max);
  margin-inline: auto;
  padding-inline: var(--space-6);
}

.container-prose {
  width: 100%;
  max-width: var(--container-prose);
  margin-inline: auto;
  padding-inline: var(--space-6);
}

.section {
  padding-block: var(--space-9);
  border-bottom: 1px solid var(--border-subtle);
}

.section-tight {
  padding-block: var(--space-7);
  border-bottom: 1px solid var(--border-subtle);
}

.section-surface {
  background-color: var(--bg-surface);
}

.section-canvas {
  background-color: var(--bg-canvas);
}

.section-dark {
  background-color: var(--bg-dark);
  color: var(--ink-on-dark);
  border-bottom-color: var(--border-on-dark);
}

.section-dark h2,
.section-dark h3 {
  color: var(--ink-on-dark);
}

.section-dark p {
  color: var(--ink-on-dark-muted);
}

.section-head {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  align-items: flex-end;
  gap: var(--space-4);
  margin-bottom: var(--space-7);
}

.section-head-copy {
  max-width: 640px;
}

.section-head-copy h2 {
  margin-bottom: var(--space-2);
}

/* Buttons */
.btn-row {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: var(--space-3);
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  min-height: 44px;
  padding: 0.625rem 1.25rem;
  font-family: var(--font-sans);
  font-size: 0.9375rem;
  font-weight: 600;
  line-height: 1.2;
  border-radius: var(--radius-sm);
  border: 1px solid transparent;
  text-decoration: none;
  cursor: pointer;
  transition: background-color 0.15s ease, border-color 0.15s ease, color 0.15s ease, transform 0.1s ease;
}

.btn svg {
  width: 16px;
  height: 16px;
  flex-shrink: 0;
  transition: transform 0.15s ease;
}

.btn:hover svg.icon-arrow {
  transform: translateX(2px);
}

.btn:active {
  transform: translateY(1px);
}

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

.btn-primary:hover {
  background-color: var(--brand-hover);
  border-color: var(--brand-hover);
  color: #FFFFFF;
  text-decoration: none;
}

.btn-primary:active {
  background-color: var(--brand-active);
  border-color: var(--brand-active);
  color: #FFFFFF;
}

.btn-primary:focus-visible {
  outline: none;
  box-shadow: 0 0 0 2px var(--bg-surface), 0 0 0 4px var(--brand-primary);
}

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

.btn-secondary:hover {
  background-color: var(--bg-subtle);
  border-color: var(--ink-secondary);
  color: var(--ink-primary);
  text-decoration: none;
}

.btn-secondary:active {
  background-color: #E2E8EE;
}

.btn-on-dark {
  background-color: var(--brand-cyan-dark);
  color: var(--ink-primary);
  border-color: var(--brand-cyan-dark);
}

.btn-on-dark:hover {
  background-color: #3BE0E8;
  border-color: #3BE0E8;
  color: var(--ink-primary);
  text-decoration: none;
}

.btn-ghost-dark {
  background-color: transparent;
  color: var(--ink-on-dark);
  border-color: #35485C;
}

.btn-ghost-dark:hover {
  background-color: var(--bg-dark-raised);
  border-color: var(--ink-on-dark-muted);
  color: #FFFFFF;
  text-decoration: none;
}

.btn-sm {
  min-height: 38px;
  padding: 0.45rem 0.95rem;
  font-size: var(--text-sm);
}

/* Explicit Placeholder Component ([ПЛЕЙСХОЛДЕР]) */
.placeholder-tag,
.placeholder-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 3px 8px;
  background-color: var(--placeholder-bg);
  border: 1px dashed var(--placeholder-border);
  border-radius: var(--radius-sm);
  color: var(--placeholder-ink);
  font-family: var(--font-mono);
  font-size: 0.75rem;
  font-weight: 500;
  line-height: 1.35;
}

.placeholder-box,
.placeholder-note {
  padding: var(--space-4) var(--space-5);
  background-color: var(--placeholder-bg);
  border: 1px dashed var(--placeholder-border);
  border-radius: var(--radius-md);
  color: var(--placeholder-ink);
}

.placeholder-box strong,
.placeholder-note strong {
  display: block;
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  margin-bottom: var(--space-1);
  color: var(--placeholder-ink);
}

.placeholder-box p,
.placeholder-note p {
  color: var(--placeholder-ink);
  font-size: var(--text-sm);
}

/* ==========================================================================
   Header & Navigation
   ========================================================================== */
.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background-color: rgba(255, 255, 255, 0.94);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--border-subtle);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-4);
  min-height: 72px;
}

.brand-link {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  text-decoration: none;
  flex-shrink: 0;
}

.brand-link img {
  height: 34px;
  width: auto;
}

.brand-suffix {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.06em;
  color: var(--brand-primary);
  background-color: var(--brand-tint);
  padding: 2px 6px;
  border-radius: 4px;
  margin-top: 2px;
}

.primary-nav {
  display: flex;
  align-items: center;
  gap: 4px;
}

.nav-link {
  display: inline-flex;
  align-items: center;
  padding: 0.5rem 0.75rem;
  font-size: 0.9375rem;
  font-weight: 500;
  color: var(--ink-secondary);
  text-decoration: none;
  border-radius: var(--radius-sm);
}

.nav-link:hover {
  color: var(--ink-primary);
  background-color: var(--bg-subtle);
  text-decoration: none;
}

.nav-link[aria-current="page"] {
  color: var(--brand-primary);
  background-color: var(--brand-tint);
  font-weight: 600;
}

.header-actions {
  display: flex;
  align-items: center;
  gap: var(--space-4);
  flex-shrink: 0;
}

.header-phone {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--ink-primary);
  text-decoration: none;
  white-space: nowrap;
}

.header-phone:hover {
  color: var(--brand-primary);
  text-decoration: none;
}

/* Mobile Disclosure Menu (<details>) */
.nav-drawer {
  display: none;
}

.nav-drawer summary {
  list-style: none;
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  min-height: 40px;
  padding: 0.45rem 0.8rem;
  background-color: var(--bg-surface);
  border: 1px solid var(--border-strong);
  border-radius: var(--radius-sm);
  font-size: var(--text-sm);
  font-weight: 600;
  color: var(--ink-primary);
  cursor: pointer;
  user-select: none;
}

.nav-drawer summary::-webkit-details-marker {
  display: none;
}

.nav-drawer summary:hover {
  background-color: var(--bg-subtle);
}

.nav-drawer-panel {
  position: absolute;
  left: 0;
  right: 0;
  top: 100%;
  background-color: var(--bg-surface);
  border-bottom: 1px solid var(--border-strong);
  box-shadow: 0 16px 32px rgba(17, 25, 34, 0.1);
  padding: var(--space-4) var(--space-5) var(--space-5);
}

.mobile-nav-list {
  list-style: none;
  margin: 0 0 var(--space-4);
  padding: 0;
  display: grid;
  gap: 4px;
}

.mobile-nav-list a {
  display: block;
  padding: 0.65rem 0.75rem;
  border-radius: var(--radius-sm);
  font-size: 1rem;
  font-weight: 500;
  color: var(--ink-primary);
  text-decoration: none;
}

.mobile-nav-list a:hover {
  background-color: var(--bg-subtle);
}

.mobile-nav-list a[aria-current="page"] {
  background-color: var(--brand-tint);
  color: var(--brand-primary);
  font-weight: 600;
}

.mobile-nav-contacts {
  padding-top: var(--space-4);
  border-top: 1px solid var(--border-subtle);
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}

/* ==========================================================================
   Breadcrumbs & Page Header
   ========================================================================== */
.page-hero {
  background-color: var(--bg-surface);
  padding-block: var(--space-7) var(--space-8);
  border-bottom: 1px solid var(--border-subtle);
}

.breadcrumbs {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: var(--space-2);
  margin: 0 0 var(--space-5);
  padding: 0;
  list-style: none;
  font-size: var(--text-sm);
  color: var(--ink-muted);
}

.breadcrumbs li {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
}

.breadcrumbs li + li::before {
  content: "/";
  color: var(--border-strong);
  font-family: var(--font-mono);
}

.breadcrumbs a {
  color: var(--ink-muted);
  text-decoration: none;
}

.breadcrumbs a:hover {
  color: var(--brand-primary);
  text-decoration: underline;
}

/* ==========================================================================
   Home Hero & Principles Panel
   ========================================================================== */
.home-hero {
  background-color: var(--bg-surface);
  padding-block: var(--space-8) var(--space-9);
  border-bottom: 1px solid var(--border-subtle);
}

.hero-grid {
  display: grid;
  grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
  gap: var(--space-7);
  align-items: center;
}

.hero-copy h1 {
  margin-bottom: var(--space-5);
}

.hero-copy .lead {
  margin-bottom: var(--space-6);
}

.hero-meta-row {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-5);
  margin-top: var(--space-6);
  padding-top: var(--space-5);
  border-top: 1px solid var(--border-subtle);
}

.hero-meta-item {
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.hero-meta-label {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  color: var(--ink-muted);
  text-transform: uppercase;
  letter-spacing: 0.03em;
}

.hero-meta-value {
  font-size: 0.9375rem;
  font-weight: 600;
  color: var(--ink-primary);
}

.principles-panel {
  background-color: var(--bg-canvas);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: var(--space-6);
}

.principles-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-bottom: var(--space-4);
  margin-bottom: var(--space-4);
  border-bottom: 1px solid var(--border-subtle);
}

.principles-title {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: var(--ink-muted);
  margin: 0;
}

.principles-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: var(--space-4);
}

.principle-item {
  display: grid;
  grid-template-columns: 36px 1fr;
  gap: var(--space-3);
  align-items: start;
  padding-bottom: var(--space-4);
  border-bottom: 1px solid var(--border-subtle);
}

.principle-item:last-child {
  padding-bottom: 0;
  border-bottom: none;
}

.principle-idx {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 32px;
  height: 32px;
  border-radius: var(--radius-sm);
  background-color: var(--brand-tint);
  color: var(--brand-primary);
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: var(--text-xs);
  font-weight: 700;
}

.principle-item strong {
  display: block;
  font-size: 1.03rem;
  color: var(--ink-primary);
  margin-bottom: 2px;
}

.principle-item span {
  display: block;
  font-size: var(--text-sm);
  color: var(--ink-muted);
  line-height: 1.45;
}

/* ==========================================================================
   Service Cards & Services Page
   ========================================================================== */
.services-grid-3 {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: var(--space-5);
}

.service-card {
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  background-color: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: var(--space-6);
  text-decoration: none;
  color: inherit;
  transition: border-color 0.15s ease, box-shadow 0.15s ease, transform 0.15s ease;
}

a.service-card:hover {
  border-color: var(--border-strong);
  box-shadow: var(--shadow-hover);
  text-decoration: none;
}

.service-icon {
  width: 44px;
  height: 44px;
  border-radius: var(--radius-sm);
  background-color: var(--brand-tint);
  color: var(--brand-primary);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  margin-bottom: var(--space-5);
}

.service-icon svg {
  width: 22px;
  height: 22px;
}

.service-card h3 {
  margin-bottom: var(--space-3);
}

.service-card p {
  font-size: 0.95rem;
  color: var(--ink-secondary);
  margin-bottom: var(--space-5);
}

.card-link-label {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: var(--text-sm);
  font-weight: 600;
  color: var(--brand-primary);
  margin-top: auto;
}

/* Compact 4th Direction Band (152-FZ) */
.fz-compact-band {
  margin-top: var(--space-5);
  background-color: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  border-left: 3px solid var(--brand-mark);
  border-radius: var(--radius-md);
  padding: var(--space-5) var(--space-6);
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-4);
}

.fz-compact-copy {
  display: flex;
  align-items: flex-start;
  gap: var(--space-4);
  max-width: 760px;
}

.fz-compact-copy h3 {
  font-size: 1.0625rem;
  margin-bottom: 4px;
}

.fz-compact-copy p {
  font-size: 0.9375rem;
  margin: 0;
}

/* Services Page Jump Bar & Editorial Sections */
.jump-nav {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
  margin-top: var(--space-5);
}

.jump-pill {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 0.45rem 0.9rem;
  background-color: var(--bg-canvas);
  border: 1px solid var(--border-subtle);
  border-radius: 999px;
  font-size: var(--text-sm);
  font-weight: 500;
  color: var(--ink-secondary);
  text-decoration: none;
}

.jump-pill:hover {
  border-color: var(--brand-primary);
  color: var(--brand-primary);
  background-color: var(--brand-tint);
  text-decoration: none;
}

.service-detail-grid {
  display: grid;
  grid-template-columns: minmax(0, 4fr) minmax(0, 8fr);
  gap: var(--space-7);
  align-items: start;
}

.service-detail-aside {
  position: sticky;
  top: 96px;
}

.service-detail-body {
  display: grid;
  gap: var(--space-5);
}

.prose-card {
  background-color: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: var(--space-6);
}

.section-surface .prose-card {
  background-color: var(--bg-canvas);
}

.callout-quote {
  margin: var(--space-4) 0;
  padding: var(--space-4) var(--space-5);
  border-left: 3px solid var(--brand-mark);
  background-color: var(--brand-tint);
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  color: var(--ink-primary);
  font-weight: 500;
}

.feature-points {
  list-style: none;
  margin: var(--space-4) 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: var(--space-3);
}

.feature-points li {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  padding: var(--space-3) var(--space-4);
  background-color: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-sm);
  font-size: var(--text-sm);
  color: var(--ink-primary);
}

.feature-points li::before {
  content: "";
  width: 7px;
  height: 7px;
  margin-top: 7px;
  border-radius: 50%;
  background-color: var(--brand-mark);
  flex-shrink: 0;
}

.stat-highlight {
  display: flex;
  align-items: baseline;
  gap: var(--space-4);
  padding: var(--space-5);
  background-color: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
}

.stat-number {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: clamp(2rem, 3.5vw, 2.75rem);
  font-weight: 700;
  line-height: 1;
  color: var(--brand-primary);
  flex-shrink: 0;
}

/* ==========================================================================
   Portfolio Grid, Browser Frames & Pure CSS Filter
   ========================================================================== */
.portfolio-filter-bar {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-4);
  margin-bottom: var(--space-6);
}

.filter-group {
  display: inline-flex;
  flex-wrap: wrap;
  gap: 6px;
  padding: 5px;
  background-color: var(--bg-subtle);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
}

.filter-option input[type="radio"] {
  position: absolute;
  opacity: 0;
  pointer-events: none;
}

.filter-option span {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 0.45rem 0.95rem;
  border-radius: var(--radius-sm);
  font-size: var(--text-sm);
  font-weight: 500;
  color: var(--ink-secondary);
  cursor: pointer;
  transition: background-color 0.15s ease, color 0.15s ease;
}

.filter-option span:hover {
  color: var(--ink-primary);
}

.filter-option input[type="radio"]:checked + span {
  background-color: var(--bg-surface);
  color: var(--brand-primary);
  font-weight: 600;
  box-shadow: 0 1px 3px rgba(17, 25, 34, 0.08);
}

.filter-option input[type="radio"]:focus-visible + span {
  outline: 2px solid var(--brand-primary);
  outline-offset: 2px;
}

.portfolio-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: var(--space-5);
}

/* Pure CSS Filtering via :has() */
.portfolio-explorer:has(#filter-site:checked) .project-card[data-type="webapp"] {
  display: none;
}

.portfolio-explorer:has(#filter-webapp:checked) .project-card[data-type="site"] {
  display: none;
}

.project-card {
  display: flex;
  flex-direction: column;
  background-color: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  overflow: hidden;
  transition: border-color 0.15s ease, box-shadow 0.15s ease;
}

.project-card:hover {
  border-color: var(--border-strong);
  box-shadow: var(--shadow-hover);
}

.browser-chrome {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-2);
  padding: 8px 12px;
  background-color: var(--bg-subtle);
  border-bottom: 1px solid var(--border-subtle);
}

.browser-dots {
  display: inline-flex;
  gap: 5px;
}

.browser-dots i {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background-color: #C2CDD8;
  display: block;
}

.browser-addr {
  font-family: var(--font-mono);
  font-size: 0.73rem;
  color: var(--ink-muted);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.project-thumb-link {
  position: relative;
  display: block;
  aspect-ratio: 16 / 10;
  overflow: hidden;
  background-color: #E8EEF3;
  border-bottom: 1px solid var(--border-subtle);
}

.project-thumb-link img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: top center;
  transition: transform 0.25s ease;
}

.project-card:hover .project-thumb-link img {
  transform: scale(1.02);
}

.project-body {
  padding: var(--space-4) var(--space-5) var(--space-5);
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
  flex: 1;
}

.project-meta-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-2);
}

.type-badge {
  display: inline-flex;
  align-items: center;
  padding: 2px 8px;
  border-radius: 4px;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  font-weight: 600;
  background-color: var(--bg-subtle);
  color: var(--ink-secondary);
}

.type-badge-webapp {
  background-color: var(--brand-tint);
  color: var(--brand-primary);
}

.project-title {
  font-size: 1.05rem;
  font-weight: 600;
  margin: 2px 0 0;
  color: var(--ink-primary);
}

/* Native Lightbox Dialog */
.lightbox-dialog {
  max-width: min(960px, 92vw);
  width: 100%;
  padding: 0;
  border: 1px solid var(--border-strong);
  border-radius: var(--radius-lg);
  background-color: var(--bg-surface);
  box-shadow: 0 24px 60px rgba(17, 25, 34, 0.35);
}

.lightbox-dialog::backdrop {
  background-color: rgba(17, 25, 34, 0.72);
}

.lightbox-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--space-3) var(--space-5);
  border-bottom: 1px solid var(--border-subtle);
  background-color: var(--bg-canvas);
}

.lightbox-head strong {
  font-family: var(--font-mono);
  font-size: var(--text-sm);
}

.lightbox-body {
  padding: var(--space-4);
  background-color: var(--bg-subtle);
}

.lightbox-body img {
  width: 100%;
  height: auto;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border-subtle);
}

/* ==========================================================================
   Team / About Page
   ========================================================================== */
.team-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: var(--space-5);
}

.member-card {
  background-color: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: var(--space-5);
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
}

.member-head {
  display: flex;
  align-items: center;
  gap: var(--space-4);
}

.member-photo {
  width: 88px;
  height: 88px;
  border-radius: var(--radius-md);
  object-fit: cover;
  border: 1px solid var(--border-subtle);
  background-color: var(--bg-subtle);
  flex-shrink: 0;
}

.member-id h3 {
  font-size: 1.0625rem;
  margin-bottom: 4px;
}

.member-role {
  display: block;
  font-size: var(--text-sm);
  font-weight: 500;
  color: var(--brand-primary);
  line-height: 1.35;
}

.member-bio {
  padding-top: var(--space-4);
  border-top: 1px solid var(--border-subtle);
  font-size: 0.9375rem;
  color: var(--ink-secondary);
  margin: 0;
}

/* ==========================================================================
   Contacts & Feedback Form
   ========================================================================== */
.offices-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: var(--space-5);
}

.office-card {
  background-color: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: var(--space-6);
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
}

.office-city-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-3);
  padding-bottom: var(--space-3);
  border-bottom: 1px solid var(--border-subtle);
}

.office-city-row h2 {
  font-size: 1.35rem;
  margin: 0;
}

.office-dl {
  margin: 0;
  display: grid;
  gap: var(--space-3);
}

.office-dl dt {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  text-transform: uppercase;
  letter-spacing: 0.03em;
  color: var(--ink-muted);
  margin-bottom: 2px;
}

.office-dl dd {
  margin: 0;
  font-size: 0.975rem;
  color: var(--ink-primary);
}

.feedback-layout {
  display: grid;
  grid-template-columns: minmax(0, 5fr) minmax(0, 7fr);
  gap: var(--space-7);
  align-items: start;
}

.form-panel {
  background-color: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: var(--space-6);
}

.form-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: var(--space-4);
}

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

.form-field-full {
  grid-column: 1 / -1;
}

.form-field label {
  font-size: var(--text-sm);
  font-weight: 600;
  color: var(--ink-primary);
}

.form-control {
  width: 100%;
  min-height: 44px;
  padding: 0.625rem 0.875rem;
  font-family: var(--font-sans);
  font-size: 1rem;
  color: var(--ink-primary);
  background-color: var(--bg-surface);
  border: 1px solid var(--border-strong);
  border-radius: var(--radius-sm);
  transition: border-color 0.15s ease, box-shadow 0.15s ease;
}

.form-control:hover {
  border-color: #94A6B8;
}

.form-control:focus {
  outline: none;
  border-color: var(--brand-primary);
  box-shadow: 0 0 0 3px rgba(0, 109, 122, 0.14);
}

textarea.form-control {
  min-height: 124px;
  resize: vertical;
}

.consent-row {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  font-size: var(--text-sm);
  color: var(--ink-secondary);
}

.consent-row input[type="checkbox"] {
  width: 18px;
  height: 18px;
  margin-top: 2px;
  accent-color: var(--brand-primary);
  flex-shrink: 0;
}

.form-status {
  display: none;
  margin-top: var(--space-4);
  padding: var(--space-4);
  background-color: var(--ok-bg);
  border: 1px solid var(--ok-border);
  border-radius: var(--radius-sm);
  color: var(--ok-ink);
  font-size: 0.9375rem;
}

.form-status.is-visible {
  display: block;
}

/* ==========================================================================
   CTA Contact Strip
   ========================================================================== */
.cta-panel {
  background-color: var(--bg-dark);
  color: var(--ink-on-dark);
  border-radius: var(--radius-lg);
  padding: var(--space-7);
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-6);
}

.cta-panel h2 {
  color: var(--ink-on-dark);
  margin-bottom: var(--space-2);
}

.cta-panel p {
  color: var(--ink-on-dark-muted);
  max-width: 54ch;
}

.cta-direct {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: var(--space-3);
}

.cta-phone-big {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: clamp(1.35rem, 2.2vw, 1.75rem);
  font-weight: 700;
  color: #FFFFFF;
  text-decoration: none;
}

.cta-phone-big:hover {
  color: var(--brand-cyan-dark);
  text-decoration: none;
}

/* ==========================================================================
   Legal / Privacy Policy Prose
   ========================================================================== */
.legal-card {
  background-color: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: var(--space-7);
}

.legal-prose h2 {
  font-size: 1.3rem;
  margin-top: var(--space-6);
  margin-bottom: var(--space-3);
  padding-top: var(--space-5);
  border-top: 1px solid var(--border-subtle);
}

.legal-prose h2:first-of-type {
  margin-top: 0;
  padding-top: 0;
  border-top: none;
}

.legal-prose ul {
  margin: 0 0 var(--space-4);
  padding-left: 1.3rem;
  color: var(--ink-secondary);
}

.legal-prose li {
  margin-bottom: var(--space-2);
}

/* ==========================================================================
   Site Footer
   ========================================================================== */
.site-footer {
  background-color: var(--bg-dark);
  color: var(--ink-on-dark-muted);
  padding-block: var(--space-8) var(--space-6);
  font-size: var(--text-sm);
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1.1fr 1.1fr;
  gap: var(--space-6);
  padding-bottom: var(--space-7);
  border-bottom: 1px solid var(--border-on-dark);
}

.footer-brand img {
  height: 32px;
  width: auto;
  margin-bottom: var(--space-4);
}

.footer-brand p {
  color: var(--ink-on-dark-muted);
  font-size: var(--text-sm);
  max-width: 34ch;
  margin-bottom: var(--space-3);
}

.footer-principles {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 4px;
  font-size: var(--text-xs);
  color: var(--ink-on-dark-muted);
}

.footer-principles li {
  display: flex;
  align-items: center;
  gap: 6px;
}

.footer-principles li::before {
  content: "";
  width: 5px;
  height: 5px;
  border-radius: 50%;
  background-color: var(--brand-cyan-dark);
  flex-shrink: 0;
}

.footer-col h3 {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--ink-on-dark);
  margin-bottom: var(--space-3);
}

.footer-links {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 8px;
}

.footer-links a,
.site-footer a {
  color: var(--ink-on-dark-muted);
  text-decoration: none;
}

.footer-links a:hover,
.site-footer a:hover {
  color: #FFFFFF;
  text-decoration: underline;
}

.footer-bottom {
  padding-top: var(--space-5);
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-3);
  color: var(--ink-on-dark-muted);
  font-size: 0.8125rem;
}

/* ==========================================================================
   Responsive Breakpoints (Tablet & Mobile)
   ========================================================================== */
@media (max-width: 1023px) {
  .container,
  .container-prose {
    padding-inline: 1.75rem; /* 28px */
  }

  .section {
    padding-block: 3.75rem; /* 60px */
  }

  .primary-nav,
  .header-actions {
    display: none;
  }

  .nav-drawer {
    display: block;
  }

  .header-inner {
    min-height: 64px;
  }

  .hero-grid,
  .service-detail-grid,
  .feedback-layout {
    grid-template-columns: 1fr;
    gap: var(--space-5);
  }

  .service-detail-aside {
    position: static;
  }

  .services-grid-3,
  .portfolio-grid,
  .team-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 1.25rem; /* 20px */
  }

  .footer-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (max-width: 767px) {
  .container,
  .container-prose {
    padding-inline: 1.25rem; /* 20px from 400px */
  }

  .header-inner {
    min-height: 60px;
  }

  .section {
    padding-block: 2.75rem; /* 44px */
  }

  .home-hero,
  .page-hero {
    padding-block: 2.25rem 2.75rem;
  }

  .services-grid-3,
  .portfolio-grid,
  .team-grid,
  .offices-grid,
  .form-grid,
  .feature-points,
  .footer-grid {
    grid-template-columns: 1fr;
    gap: 1rem; /* 16px */
  }

  .cta-panel,
  .legal-card,
  .principles-panel,
  .form-panel {
    padding: var(--space-5);
  }

  .btn-row .btn {
    width: 100%;
    min-height: 46px;
  }

  .stat-highlight {
    flex-direction: column;
    gap: var(--space-2);
  }
}

@media (max-width: 399px) {
  .container,
  .container-prose {
    padding-inline: 1rem; /* 16px */
  }
}