/* ==========================================================================
   Особистий сайт-портфоліо Андрія Валька
   styles.css — Стриманий професійний дизайн у графітових тонах із синім акцентом
   ========================================================================== */

/* --------------------------------------------------------------------------
   1. CSS ЗМІННІ (CUSTOM PROPERTIES)
   -------------------------------------------------------------------------- */
:root {
  /* Prism Motion palette */
  --color-bg-body: #090d14;
  --color-bg-surface: #0d141d;
  --color-bg-card: #111a24;
  --color-bg-card-hover: #172431;
  --color-bg-subtle: #192633;
  --color-bg-input: #0b121a;

  /* Типографіка та контраст */
  --color-text-main: #f1f7ff;
  --color-text-muted: #9caabb;
  --color-text-dim: #78889a;

  /* Cyan and violet Prism accents */
  --color-accent: #71dcff;
  --color-accent-light: #71dcff;
  --color-accent-secondary: #b993ff;
  --color-accent-hover: #a6eaff;
  --color-accent-bg: rgba(113, 220, 255, 0.09);
  --color-accent-border: rgba(113, 220, 255, 0.26);
  --color-accent-glow: rgba(113, 220, 255, 0.12);

  /* Тонкі лінії та розділювачі */
  --color-border: #263542;
  --color-border-hover: #3a5364;
  --color-border-focus: #71dcff;

  /* Шрифти */
  --font-family-base: "Manrope", -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  --font-family-display: "Space Grotesk", "Manrope", sans-serif;
  --font-family-mono: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;

  /* Геометрія та сітка */
  --container-max-width: 1180px;
  --container-padding: 1.5rem;
  --header-height: 4.25rem;
  --radius-sm: 10px;
  --radius-md: 15px;
  --radius-lg: 21px;
  --radius-full: 9999px;

  /* Стримані тіні та переходи */
  --shadow-subtle: 0 4px 16px rgba(0, 0, 0, 0.35);
  --shadow-card: 0 8px 24px rgba(0, 0, 0, 0.45);
  --transition-fast: 0.18s ease;
  --transition-normal: 0.25s cubic-bezier(0.4, 0, 0.2, 1);
}

/* --------------------------------------------------------------------------
   2. СКИДАННЯ ТА БАЗОВІ СТИЛІ
   -------------------------------------------------------------------------- */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  font-family: var(--font-family-base);
  font-size: 16px;
  line-height: 1.6;
  color: var(--color-text-main);
  background-color: var(--color-bg-body);
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  background-color: var(--color-bg-body);
  color: var(--color-text-main);
  overflow-x: hidden;
}

/* Доступність: клавіатурний перехід */
.skip-link {
  position: absolute;
  top: -100px;
  left: 1rem;
  background-color: var(--color-accent);
  color: #ffffff;
  padding: 0.75rem 1.25rem;
  border-radius: var(--radius-sm);
  font-weight: 600;
  z-index: 1000;
  transition: top var(--transition-fast);
  text-decoration: none;
}

.skip-link:focus {
  top: 1rem;
}

/* Посилання та кнопки */
a {
  color: inherit;
  text-decoration: none;
  transition: color var(--transition-fast);
}

button, input {
  font: inherit;
}

button {
  cursor: pointer;
  border: none;
  background: none;
}

/* Фокус для доступності */
:focus-visible {
  outline: 2px solid var(--color-border-focus);
  outline-offset: 2px;
}

/* Контейнер */
.container {
  width: 100%;
  max-width: var(--container-max-width);
  margin-left: auto;
  margin-right: auto;
  padding-left: var(--container-padding);
  padding-right: var(--container-padding);
}

.mx-auto {
  margin-left: auto;
  margin-right: auto;
}

/* Секції */
.section {
  padding-top: 5rem;
  padding-bottom: 5rem;
  position: relative;
}

.section-header {
  margin-bottom: 2.75rem;
}

.section-header.text-center {
  text-align: center;
}

.section-tag {
  display: inline-block;
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--color-accent-light);
  margin-bottom: 0.5rem;
}

.section-title {
  font-size: clamp(1.75rem, 3.2vw, 2.35rem);
  font-weight: 700;
  line-height: 1.25;
  color: var(--color-text-main);
  letter-spacing: -0.02em;
}

.section-subtitle {
  font-size: 1.05rem;
  color: var(--color-text-muted);
  max-width: 620px;
  margin-top: 0.6rem;
  line-height: 1.6;
}

/* --------------------------------------------------------------------------
   3. КНОПКИ
   -------------------------------------------------------------------------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.8rem 1.6rem;
  font-size: 0.95rem;
  font-weight: 600;
  border-radius: var(--radius-md);
  transition: all var(--transition-fast);
  text-align: center;
  line-height: 1;
}

.btn-sm {
  padding: 0.55rem 1rem;
  font-size: 0.85rem;
}

.btn-primary {
  background-color: var(--color-accent);
  color: #ffffff;
  border: 1px solid var(--color-accent);
}

.btn-primary:hover, .btn-primary:focus-visible {
  background-color: var(--color-accent-hover);
  border-color: var(--color-accent-hover);
  transform: translateY(-1px);
}

.btn-outline {
  background-color: transparent;
  color: var(--color-text-main);
  border: 1px solid var(--color-border-hover);
}

.btn-outline:hover, .btn-outline:focus-visible {
  border-color: var(--color-accent-light);
  background-color: var(--color-accent-bg);
  color: #ffffff;
  transform: translateY(-1px);
}

/* --------------------------------------------------------------------------
   4. ШАПКА ТА НАВІГАЦІЯ
   -------------------------------------------------------------------------- */
.site-header {
  position: sticky;
  top: 0;
  left: 0;
  width: 100%;
  height: var(--header-height);
  background-color: rgba(13, 17, 23, 0.92);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--color-border);
  z-index: 50;
}

.header-container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
}

.brand-logo {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  font-weight: 700;
  font-size: 1.1rem;
  letter-spacing: -0.01em;
}

.brand-monogram {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  background-color: var(--color-accent);
  color: #ffffff;
  font-size: 0.85rem;
  font-weight: 700;
  border-radius: var(--radius-sm);
}

.brand-text {
  color: var(--color-text-main);
}

.nav-list {
  display: flex;
  align-items: center;
  list-style: none;
  gap: 1.75rem;
}

.nav-link {
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--color-text-muted);
  position: relative;
  padding: 0.4rem 0;
  transition: color var(--transition-fast);
}

.nav-link:hover, .nav-link.active {
  color: var(--color-text-main);
}

.nav-link.active::after {
  content: '';
  position: absolute;
  left: 0;
  bottom: -2px;
  width: 100%;
  height: 2px;
  background-color: var(--color-accent-light);
}

/* Елементи керування */
.header-controls {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

/* Кнопка 2D ігрового режиму */
.game-toggle-btn {
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
  background-color: var(--color-bg-card);
  border: 1px solid var(--color-border);
  color: var(--color-text-muted);
  font-size: 0.78rem;
  font-weight: 600;
  padding: 0.35rem 0.75rem;
  border-radius: var(--radius-full);
  transition: all var(--transition-fast);
  line-height: 1;
}

.game-toggle-btn:hover {
  border-color: var(--color-accent-light);
  color: #ffffff;
  background-color: var(--color-accent-bg);
}

.game-btn-icon {
  color: var(--color-accent-light);
}

body.game-mode-active .game-toggle-btn {
  border-color: var(--color-accent-light);
  color: #ffffff;
  background-color: var(--color-accent);
  box-shadow: 0 0 18px var(--color-accent-glow);
}

body.game-mode-active .game-toggle-btn .game-btn-icon {
  color: #ffffff;
}

.lang-switcher {
  display: inline-flex;
  align-items: center;
  background-color: var(--color-bg-card);
  border: 1px solid var(--color-border);
  padding: 0.2rem 0.4rem;
  border-radius: var(--radius-full);
  gap: 0.25rem;
}

.lang-btn {
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.04em;
  color: var(--color-text-dim);
  padding: 0.25rem 0.5rem;
  border-radius: var(--radius-full);
  transition: all var(--transition-fast);
  line-height: 1;
}

.lang-btn:hover {
  color: var(--color-text-main);
}

.lang-btn.active {
  color: #ffffff;
  background-color: var(--color-accent);
}

.lang-separator {
  color: var(--color-border-hover);
  font-size: 0.75rem;
  user-select: none;
}

/* Кнопка-гамбургер */
.nav-toggle {
  display: none;
  width: 40px;
  height: 40px;
  align-items: center;
  justify-content: center;
  flex-direction: column;
  gap: 5px;
  border-radius: var(--radius-sm);
  background-color: var(--color-bg-card);
  border: 1px solid var(--color-border);
  color: var(--color-text-main);
  transition: all var(--transition-fast);
}

.nav-toggle-bar {
  display: block;
  width: 18px;
  height: 2px;
  background-color: currentColor;
  border-radius: 2px;
  transition: transform var(--transition-fast), opacity var(--transition-fast);
}

.nav-toggle[aria-expanded="true"] .nav-toggle-bar:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}
.nav-toggle[aria-expanded="true"] .nav-toggle-bar:nth-child(2) {
  opacity: 0;
}
.nav-toggle[aria-expanded="true"] .nav-toggle-bar:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

/* --------------------------------------------------------------------------
   5. ПЕРШИЙ ЕКРАН (HERO)
   -------------------------------------------------------------------------- */
.hero-section {
  padding-top: calc(var(--header-height) + 2rem);
  padding-bottom: 5.5rem;
  background: radial-gradient(circle at 72% 12%, rgba(113, 220, 255, 0.11), transparent 38%),
              radial-gradient(circle at 82% 42%, rgba(185, 147, 255, 0.08), transparent 34%),
              var(--color-bg-body);
}

.hero-grid {
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  gap: 3rem;
  align-items: center;
}

.hero-eyebrow {
  display: inline-block;
  font-size: 0.8rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--color-accent-light);
  margin-bottom: 1rem;
}

.hero-title {
  font-size: clamp(2.2rem, 4.2vw, 3.4rem);
  font-weight: 800;
  line-height: 1.15;
  letter-spacing: -0.03em;
  color: var(--color-text-main);
  margin-bottom: 1.25rem;
}

.hero-subtitle {
  font-size: 1.1rem;
  color: var(--color-text-muted);
  line-height: 1.65;
  margin-bottom: 2rem;
  max-width: 580px;
}

.hero-actions {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 1rem;
}

/* Інтерактивний віджет у Hero */
.hero-interactive-card {
  background-color: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 1.5rem;
  box-shadow: var(--shadow-card);
  display: flex;
  flex-direction: column;
}

.widget-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 1rem;
  font-size: 0.78rem;
}

.widget-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
  font-weight: 600;
  color: var(--color-accent-light);
}

.widget-live-dot {
  width: 7px;
  height: 7px;
  background-color: var(--color-accent-light);
  border-radius: 50%;
  animation: pulse-dot 2s infinite ease-in-out;
}

.widget-hint {
  color: var(--color-text-dim);
}

.widget-tabs {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 0.35rem;
  background-color: var(--color-bg-body);
  padding: 0.25rem;
  border-radius: var(--radius-md);
  border: 1px solid var(--color-border);
  margin-bottom: 1rem;
}

.widget-tab {
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--color-text-muted);
  padding: 0.5rem 0.25rem;
  border-radius: var(--radius-sm);
  transition: all var(--transition-fast);
  text-align: center;
}

.widget-tab:hover {
  color: var(--color-text-main);
}

.widget-tab.active {
  background-color: var(--color-bg-card);
  color: #ffffff;
  border: 1px solid var(--color-border-hover);
}

.widget-body {
  background-color: var(--color-bg-input);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 1.25rem;
  min-height: 130px;
  display: flex;
  align-items: center;
}

.widget-code-preview code {
  display: block;
  font-family: var(--font-family-mono);
  font-size: 0.8rem;
  color: var(--color-accent-light);
  margin-bottom: 0.6rem;
  word-break: break-all;
}

.widget-panel-text {
  font-size: 0.88rem;
  color: var(--color-text-muted);
  line-height: 1.5;
}

.widget-footer {
  margin-top: 1rem;
  padding-top: 0.75rem;
  border-top: 1px solid var(--color-border);
  text-align: right;
}

.widget-link {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  font-size: 0.82rem;
  font-weight: 600;
  color: var(--color-accent-light);
}

.widget-link:hover {
  text-decoration: underline;
}

/* --------------------------------------------------------------------------
   6. РОЗДІЛ "ВИБРАНІ РОБОТИ"
   -------------------------------------------------------------------------- */
.works-section {
  background-color: var(--color-bg-surface);
  border-top: 1px solid var(--color-border);
  border-bottom: 1px solid var(--color-border);
}

.works-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.5rem;
}

.work-card {
  background-color: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 1.75rem;
  display: flex;
  flex-direction: column;
  transition: border-color var(--transition-fast), transform var(--transition-fast);
}

.work-card:hover {
  border-color: var(--color-border-hover);
  transform: translateY(-2px);
}

.work-badge-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.5rem;
  margin-bottom: 1rem;
}

.work-status-badge {
  font-size: 0.72rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  padding: 0.25rem 0.55rem;
  border-radius: var(--radius-full);
  background-color: var(--color-bg-subtle);
  color: var(--color-accent-light);
  border: 1px solid var(--color-border);
}

.work-tech-badge {
  font-size: 0.75rem;
  font-family: var(--font-family-mono);
  color: var(--color-text-dim);
}

.work-title {
  font-size: 1.2rem;
  font-weight: 700;
  color: var(--color-text-main);
  line-height: 1.35;
  margin-bottom: 1.25rem;
}

.work-block {
  margin-bottom: 1rem;
}

.work-label {
  font-size: 0.8rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: var(--color-text-dim);
  margin-bottom: 0.35rem;
}

.work-text {
  font-size: 0.9rem;
  color: var(--color-text-muted);
  line-height: 1.55;
}

.work-list {
  list-style: none;
  font-size: 0.875rem;
  color: var(--color-text-muted);
  line-height: 1.5;
}

.work-list li {
  position: relative;
  padding-left: 1.1rem;
  margin-bottom: 0.35rem;
}

.work-list li::before {
  content: '•';
  position: absolute;
  left: 0;
  color: var(--color-accent-light);
  font-weight: 700;
}

.work-footer {
  margin-top: auto;
  padding-top: 1.25rem;
  border-top: 1px solid var(--color-border);
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.work-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
}

.work-tags span {
  font-size: 0.72rem;
  font-family: var(--font-family-mono);
  background-color: var(--color-bg-body);
  border: 1px solid var(--color-border);
  color: var(--color-text-muted);
  padding: 0.2rem 0.5rem;
  border-radius: var(--radius-sm);
}

/* --------------------------------------------------------------------------
   7. РОЗДІЛ "ПОСЛУГИ"
   -------------------------------------------------------------------------- */
.services-section {
  background-color: var(--color-bg-body);
}

.cards-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.5rem;
}

.card {
  background-color: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 2rem;
  display: flex;
  flex-direction: column;
  transition: border-color var(--transition-fast), transform var(--transition-fast);
}

.card:hover {
  border-color: var(--color-border-hover);
  transform: translateY(-2px);
}

.card-icon-wrapper {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 48px;
  height: 48px;
  background-color: var(--color-accent-bg);
  border: 1px solid var(--color-accent-border);
  color: var(--color-accent-light);
  border-radius: var(--radius-md);
  margin-bottom: 1.25rem;
}

.card-title {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--color-text-main);
  margin-bottom: 0.75rem;
}

.card-text {
  font-size: 0.92rem;
  color: var(--color-text-muted);
  line-height: 1.6;
  margin-bottom: 1.25rem;
}

.service-outcome {
  margin-top: auto;
  padding: 1rem;
  background-color: var(--color-bg-body);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  font-size: 0.85rem;
}

.service-outcome strong {
  display: block;
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--color-accent-light);
  margin-bottom: 0.35rem;
}

.service-outcome p {
  color: var(--color-text-muted);
  line-height: 1.5;
}

/* --------------------------------------------------------------------------
   8. РОЗДІЛ "ПРОЦЕС РОБОТИ"
   -------------------------------------------------------------------------- */
.process-section {
  background-color: var(--color-bg-surface);
  border-top: 1px solid var(--color-border);
  border-bottom: 1px solid var(--color-border);
}

.process-timeline {
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
}

.process-step {
  display: grid;
  grid-template-columns: 80px 1fr;
  gap: 1.5rem;
  align-items: start;
  background-color: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 1.5rem;
  transition: border-color var(--transition-fast);
}

.process-step:hover {
  border-color: var(--color-border-hover);
}

.step-num {
  font-family: var(--font-family-mono);
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--color-accent-light);
  line-height: 1;
  padding: 0.5rem;
  background-color: var(--color-bg-body);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  text-align: center;
}

.step-title {
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--color-text-main);
  margin-bottom: 0.4rem;
}

.step-text {
  font-size: 0.92rem;
  color: var(--color-text-muted);
  line-height: 1.6;
  margin-bottom: 0.75rem;
}

.step-deliverable {
  font-size: 0.85rem;
  color: var(--color-text-dim);
}

.step-deliverable span {
  text-transform: uppercase;
  font-size: 0.72rem;
  letter-spacing: 0.05em;
  margin-right: 0.35rem;
}

.step-deliverable strong {
  color: var(--color-text-main);
}

/* --------------------------------------------------------------------------
   9. РОЗДІЛ "ШОУРУМ" (БАНЕР)
   -------------------------------------------------------------------------- */
.showroom-banner {
  background-color: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 2.5rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 2rem;
}

.showroom-banner-content {
  max-width: 650px;
}

.showroom-banner-title {
  font-size: 1.6rem;
  font-weight: 700;
  color: var(--color-text-main);
  margin-bottom: 0.6rem;
}

.showroom-banner-desc {
  font-size: 0.98rem;
  color: var(--color-text-muted);
  line-height: 1.6;
}

/* --------------------------------------------------------------------------
   10. РОЗДІЛ "ПРО МЕНЕ"
   -------------------------------------------------------------------------- */
.about-section {
  background-color: var(--color-bg-surface);
  border-top: 1px solid var(--color-border);
  border-bottom: 1px solid var(--color-border);
}

.about-grid {
  display: grid;
  grid-template-columns: 1.1fr 1fr;
  gap: 2.5rem;
  align-items: start;
}

.about-text-card {
  background-color: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 2rem;
}

.about-paragraph {
  font-size: 1rem;
  color: var(--color-text-muted);
  line-height: 1.7;
}

.about-paragraph strong {
  color: var(--color-text-main);
}

.about-paragraph + .about-paragraph {
  margin-top: 1.25rem;
}

.about-features {
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
}

.feature-item {
  display: flex;
  align-items: flex-start;
  gap: 1.25rem;
  padding: 1.25rem;
  background-color: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  transition: border-color var(--transition-fast);
}

.feature-item:hover {
  border-color: var(--color-border-hover);
}

.feature-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  flex-shrink: 0;
  background-color: var(--color-bg-body);
  border: 1px solid var(--color-border);
  color: var(--color-accent-light);
  border-radius: var(--radius-sm);
}

.feature-title {
  font-size: 1rem;
  font-weight: 600;
  color: var(--color-text-main);
  margin-bottom: 0.35rem;
}

.feature-desc {
  font-size: 0.88rem;
  color: var(--color-text-muted);
  line-height: 1.5;
}

/* --------------------------------------------------------------------------
   11. РОЗДІЛ "КОНТАКТИ"
   -------------------------------------------------------------------------- */
.contacts-section {
  background-color: var(--color-bg-body);
}

.contacts-card {
  max-width: 640px;
  margin: 0 auto;
  background-color: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 2.5rem;
  text-align: center;
  box-shadow: var(--shadow-card);
}

.contacts-icon-container {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 64px;
  height: 64px;
  border-radius: 50%;
  background-color: var(--color-accent-bg);
  border: 1px solid var(--color-accent-border);
  color: var(--color-accent-light);
  margin-bottom: 1.25rem;
}

.contacts-notice-title {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--color-text-main);
  margin-bottom: 0.75rem;
}

.contacts-notice-desc {
  font-size: 0.95rem;
  color: var(--color-text-muted);
  line-height: 1.6;
  margin-bottom: 1.5rem;
}

.contacts-placeholder-box {
  background-color: var(--color-bg-body);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 1.25rem;
  margin-bottom: 1.5rem;
  text-align: left;
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.contacts-placeholder-item {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 0.88rem;
  gap: 1rem;
}

.placeholder-label {
  font-weight: 600;
  color: var(--color-text-main);
}

.placeholder-value {
  color: var(--color-text-dim);
  font-family: var(--font-family-mono);
  font-size: 0.8rem;
}

.contacts-status-pill {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.45rem 1rem;
  background-color: var(--color-bg-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-full);
  font-size: 0.82rem;
  color: var(--color-text-muted);
}

.status-indicator {
  width: 6px;
  height: 6px;
  background-color: var(--color-accent-light);
  border-radius: 50%;
  animation: pulse-dot 2s infinite ease-in-out;
}

@keyframes pulse-dot {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.35; transform: scale(0.85); }
}

/* --------------------------------------------------------------------------
   12. СТИЛІ СТОРІНКИ ШОУРУМУ (SHOWROOM.HTML)
   -------------------------------------------------------------------------- */
.showroom-hero {
  padding-top: calc(var(--header-height) + 1.5rem);
  padding-bottom: 3rem;
  border-bottom: 1px solid var(--color-border);
  background: radial-gradient(circle at 72% 12%, rgba(113, 220, 255, 0.11), transparent 38%),
              radial-gradient(circle at 82% 42%, rgba(185, 147, 255, 0.08), transparent 34%),
              var(--color-bg-body);
}

.back-link {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.85rem;
  font-weight: 500;
  color: var(--color-text-muted);
  margin-bottom: 1.5rem;
}

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

.demo-section {
  padding-top: 3.5rem;
  padding-bottom: 3.5rem;
  border-bottom: 1px solid var(--color-border);
}

.demo-card {
  background-color: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 2.25rem;
}

.demo-card-header {
  margin-bottom: 2rem;
}

.demo-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--color-accent-light);
  margin-bottom: 0.6rem;
}

.demo-title {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--color-text-main);
  margin-bottom: 0.5rem;
}

.demo-desc {
  font-size: 0.95rem;
  color: var(--color-text-muted);
  max-width: 700px;
  line-height: 1.6;
}

.demo-sandbox {
  background-color: var(--color-bg-body);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 1.75rem;
}

/* Демо 1: Каталог */
.catalog-controls {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  margin-bottom: 1.25rem;
}

.search-box {
  position: relative;
  flex: 1;
  min-width: 240px;
}

.search-icon {
  position: absolute;
  left: 0.85rem;
  top: 50%;
  transform: translateY(-50%);
  color: var(--color-text-dim);
}

.catalog-input {
  width: 100%;
  padding: 0.65rem 0.85rem 0.65rem 2.5rem;
  background-color: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  color: var(--color-text-main);
  font-size: 0.9rem;
  transition: border-color var(--transition-fast);
}

.catalog-input:focus {
  border-color: var(--color-border-focus);
}

.filter-buttons {
  display: flex;
  flex-wrap: wrap;
  gap: 0.35rem;
}

.filter-btn {
  font-size: 0.8rem;
  font-weight: 500;
  padding: 0.45rem 0.85rem;
  border-radius: var(--radius-sm);
  background-color: var(--color-bg-card);
  border: 1px solid var(--color-border);
  color: var(--color-text-muted);
  transition: all var(--transition-fast);
}

.filter-btn:hover {
  color: var(--color-text-main);
  border-color: var(--color-border-hover);
}

.filter-btn.active {
  background-color: var(--color-accent);
  border-color: var(--color-accent);
  color: #ffffff;
}

.catalog-status {
  font-size: 0.82rem;
  color: var(--color-text-dim);
  margin-bottom: 1.25rem;
}

.catalog-status strong {
  color: var(--color-accent-light);
}

.catalog-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1rem;
}

.catalog-item {
  background-color: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 1.25rem;
  display: flex;
  flex-direction: column;
}

.catalog-item.hidden {
  display: none !important;
}

.item-cat {
  font-size: 0.72rem;
  font-family: var(--font-family-mono);
  color: var(--color-accent-light);
  margin-bottom: 0.4rem;
}

.item-title {
  font-size: 1.05rem;
  font-weight: 600;
  color: var(--color-text-main);
  margin-bottom: 0.4rem;
}

.item-desc {
  font-size: 0.85rem;
  color: var(--color-text-muted);
  line-height: 1.5;
}

/* Демо 2: Конфігуратор */
.estimator-layout {
  display: grid;
  grid-template-columns: 1.2fr 0.8fr;
  gap: 2rem;
}

.estimator-group {
  border: none;
  margin-bottom: 1.5rem;
  display: flex;
  flex-direction: column;
  gap: 0.6rem;
}

.estimator-legend {
  font-size: 0.88rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: var(--color-accent-light);
  margin-bottom: 0.5rem;
}

.est-radio-label, .est-check-label {
  display: flex;
  align-items: flex-start;
  gap: 0.75rem;
  padding: 0.75rem;
  background-color: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: border-color var(--transition-fast);
}

.est-radio-label:hover, .est-check-label:hover {
  border-color: var(--color-border-hover);
}

.est-radio-label input, .est-check-label input {
  margin-top: 0.25rem;
  accent-color: var(--color-accent);
}

.est-radio-label strong {
  display: block;
  font-size: 0.9rem;
  color: var(--color-text-main);
}

.est-radio-label small {
  display: block;
  font-size: 0.8rem;
  color: var(--color-text-dim);
}

.est-check-label span {
  font-size: 0.88rem;
  color: var(--color-text-muted);
}

.estimator-summary {
  background-color: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 1.5rem;
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
}

.summary-title {
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--color-text-main);
  border-bottom: 1px solid var(--color-border);
  padding-bottom: 0.5rem;
}

.summary-row {
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
  margin-bottom: 0.75rem;
}

.summary-label {
  font-size: 0.75rem;
  text-transform: uppercase;
  color: var(--color-text-dim);
  font-weight: 600;
}

.summary-row strong {
  font-size: 1rem;
  color: var(--color-accent-light);
}

.summary-list {
  list-style: none;
  font-size: 0.85rem;
  color: var(--color-text-muted);
  line-height: 1.5;
}

.summary-list li {
  position: relative;
  padding-left: 1rem;
  margin-bottom: 0.25rem;
}

.summary-list li::before {
  content: '✓';
  position: absolute;
  left: 0;
  color: var(--color-accent-light);
}

.summary-note {
  margin-top: auto;
  font-size: 0.78rem;
  color: var(--color-text-dim);
  line-height: 1.45;
}

/* Демо 3: Планувальник задач */
.tasks-app-container {
  max-width: 600px;
  margin: 0 auto;
}

.tasks-form {
  display: flex;
  gap: 0.5rem;
  margin-bottom: 1rem;
}

.tasks-form .catalog-input {
  padding-left: 0.85rem;
}

.tasks-toolbar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-bottom: 1rem;
  padding-bottom: 0.75rem;
  border-bottom: 1px solid var(--color-border);
}

.tasks-filter-group {
  display: flex;
  gap: 0.25rem;
}

.clear-tasks-btn {
  font-size: 0.78rem;
  color: var(--color-text-dim);
  padding: 0.35rem 0.5rem;
  border-radius: var(--radius-sm);
  transition: color var(--transition-fast);
}

.clear-tasks-btn:hover {
  color: var(--color-text-main);
}

.tasks-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  margin-bottom: 1rem;
  min-height: 80px;
}

.task-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.75rem;
  padding: 0.75rem 1rem;
  background-color: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  transition: border-color var(--transition-fast);
}

.task-item.completed span {
  text-decoration: line-through;
  color: var(--color-text-dim);
}

.task-checkbox-wrapper {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  flex: 1;
}

.task-checkbox-wrapper input {
  accent-color: var(--color-accent);
  cursor: pointer;
}

.task-delete-btn {
  color: var(--color-text-dim);
  padding: 0.2rem 0.5rem;
  border-radius: var(--radius-sm);
  font-size: 1.1rem;
  line-height: 1;
  transition: color var(--transition-fast);
}

.task-delete-btn:hover {
  color: #ef4444;
}

.tasks-footer {
  font-size: 0.8rem;
  color: var(--color-text-dim);
}

/* --------------------------------------------------------------------------
   13. ПІДВАЛ (FOOTER)
   -------------------------------------------------------------------------- */
.site-footer {
  background-color: #090c12;
  border-top: 1px solid var(--color-border);
  padding: 2.75rem 0;
  color: var(--color-text-muted);
  font-size: 0.85rem;
}

.footer-container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 1.5rem;
}

.footer-info {
  display: flex;
  align-items: center;
  gap: 0.6rem;
}

.footer-name {
  font-weight: 600;
  color: var(--color-text-main);
}

.footer-divider {
  color: var(--color-text-dim);
}

.footer-role {
  color: var(--color-text-muted);
}

.footer-copy {
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
}

.footer-tech {
  font-size: 0.8rem;
  color: var(--color-text-dim);
}

.footer-contact-links {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 0.9rem;
}

.footer-contact-links a,
.contact-method {
  color: var(--color-text-muted);
  text-decoration: none;
  transition: color var(--transition-fast), border-color var(--transition-fast), background-color var(--transition-fast);
}

.footer-contact-links a:hover,
.contact-method:hover,
.contact-method:hover .placeholder-value {
  color: var(--color-accent-light);
}

.footer-contact-links a:focus-visible,
.contact-method:focus-visible {
  outline: 2px solid var(--color-accent-light);
  outline-offset: 4px;
}

.contact-method {
  border-radius: var(--radius-sm);
}

.contact-method .placeholder-value {
  color: var(--color-accent-light);
  transition: color var(--transition-fast);
}

.back-to-top-btn {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.45rem 0.8rem;
  background-color: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  color: var(--color-text-muted);
  font-weight: 500;
  font-size: 0.8rem;
  transition: all var(--transition-fast);
}

.back-to-top-btn:hover {
  background-color: var(--color-bg-subtle);
  border-color: var(--color-border-hover);
  color: var(--color-accent-light);
}

/* --------------------------------------------------------------------------
   14. АДАПТИВНІСТЬ (RESPONSIVE MEDIA QUERIES)
   -------------------------------------------------------------------------- */
@media (max-width: 992px) {
  .hero-grid {
    grid-template-columns: 1fr;
    gap: 2.5rem;
  }

  .works-grid {
    grid-template-columns: 1fr;
    gap: 1.5rem;
  }

  .cards-grid {
    grid-template-columns: 1fr;
    gap: 1.5rem;
  }

  .about-grid {
    grid-template-columns: 1fr;
    gap: 2rem;
  }

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

  .estimator-layout {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 768px) {
  :root {
    --header-height: 4rem;
  }

  .nav-toggle {
    display: flex;
  }

  .site-nav {
    position: fixed;
    top: var(--header-height);
    left: 0;
    right: 0;
    background-color: rgba(13, 17, 23, 0.98);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border-bottom: 1px solid var(--color-border);
    padding: 1.25rem var(--container-padding) 1.75rem;
    box-shadow: 0 20px 25px -5px rgba(0, 0, 0, 0.7);
    display: none;
    opacity: 0;
    transform: translateY(-8px);
    transition: opacity var(--transition-normal), transform var(--transition-normal);
  }

  .site-nav.is-open {
    display: block;
    opacity: 1;
    transform: translateY(0);
  }

  .nav-list {
    flex-direction: column;
    align-items: stretch;
    gap: 0.4rem;
  }

  .nav-link {
    display: block;
    padding: 0.75rem 1rem;
    border-radius: var(--radius-sm);
    font-size: 1rem;
  }

  .nav-link:hover, .nav-link:focus-visible {
    background-color: var(--color-bg-card);
    color: var(--color-accent-light);
  }

  .nav-link.active::after {
    display: none;
  }

  .hero-section {
    padding-top: calc(var(--header-height) + 1.25rem);
    padding-bottom: 3.5rem;
  }

  .hero-actions {
    flex-direction: column;
    align-items: stretch;
  }

  .btn {
    width: 100%;
  }

  .process-step {
    grid-template-columns: 1fr;
    gap: 0.75rem;
  }

  .step-num {
    width: fit-content;
  }

  .showroom-banner {
    flex-direction: column;
    align-items: flex-start;
    padding: 1.75rem;
  }

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

  .section {
    padding-top: 3.5rem;
    padding-bottom: 3.5rem;
  }

  .footer-container {
    flex-direction: column;
    align-items: flex-start;
  }

  .footer-back-to-top {
    width: 100%;
  }

  .back-to-top-btn {
    width: 100%;
    justify-content: center;
  }
}

@media (max-width: 480px) {
  .header-controls {
    gap: 0.4rem;
  }

  .hero-title {
    font-size: 2rem;
  }

  .section-title {
    font-size: 1.6rem;
  }

  .hero-interactive-card, .work-card, .card, .about-text-card, .contacts-card, .demo-card {
    padding: 1.25rem;
  }

  .contacts-placeholder-item {
    flex-direction: column;
    align-items: flex-start;
    gap: 0.25rem;
  }
}

/* --------------------------------------------------------------------------
   15. ПІДТРИМКА ЗМЕНШЕННЯ РУХУ (ACCESSIBILITY)
   -------------------------------------------------------------------------- */
@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;
  }
}

/* Приховування тексту кнопки гри на вузьких екранах */
@media (max-width: 640px) {
  .game-btn-text {
    display: none;
  }
  .game-toggle-btn {
    padding: 0.35rem 0.5rem;
  }
}

/* --------------------------------------------------------------------------
   16. ІГРОВИЙ РЕЖИМ (2D ARCHER GAME MODE)
   -------------------------------------------------------------------------- */
.game-canvas {
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  pointer-events: none;
  z-index: 90;
}

/* Панель керування (HUD) */
.game-hud {
  position: fixed;
  bottom: 1.5rem;
  left: 50%;
  transform: translateX(-50%);
  z-index: 95;
  background-color: rgba(18, 23, 34, 0.94);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border: 1px solid var(--color-border-hover);
  border-radius: var(--radius-lg);
  padding: 0.75rem 1.25rem;
  box-shadow: 0 12px 30px rgba(0, 0, 0, 0.6);
  max-width: 90vw;
  pointer-events: auto;
  animation: hudSlideUp 0.25s ease-out;
  transition-property: none;
}

@keyframes hudSlideUp {
  from {
    opacity: 0;
    transform: translateX(-50%) translateY(20px);
  }
  to {
    opacity: 1;
    transform: translateX(-50%) translateY(0);
  }
}

.game-hud-inner {
  display: flex;
  align-items: center;
  gap: 1.25rem;
  flex-wrap: wrap;
  padding-right: 2rem;
  animation: hudContentIn 0.18s ease-out;
}

.game-hud-inner[hidden] {
  display: none;
}

.game-hud-toggle {
  position: absolute;
  top: 0.5rem;
  right: 0.5rem;
  width: 2.75rem;
  height: 2.75rem;
  display: grid;
  place-items: center;
  padding: 0;
  border: 0;
  border-radius: var(--radius-sm);
  background: transparent;
  color: var(--color-text-main);
  font: 18px/1 var(--font-family-base);
  cursor: pointer;
  opacity: 1;
  transition: opacity 0.18s ease-out;
}

.game-hud.is-collapsed {
  padding: 0;
  border: 0;
  background: transparent;
  box-shadow: none;
  backdrop-filter: none;
  -webkit-backdrop-filter: none;
  animation: none;
  pointer-events: none;
}

.game-hud.is-collapsed .game-hud-toggle {
  position: static;
  opacity: 0;
  pointer-events: none;
}

.game-hud.is-collapsed.is-pointer-near .game-hud-toggle,
.game-hud.is-collapsed:focus-within .game-hud-toggle {
  opacity: 1;
  pointer-events: auto;
}

.game-hud-toggle:focus-visible {
  transition: none;
}

@keyframes hudContentIn {
  from { opacity: 0; }
  to { opacity: 1; }
}

.game-hud-hint {
  font-size: 0.8rem;
  color: var(--color-text-muted);
}

.game-hud-key {
  display: inline-block;
  font-family: var(--font-family-mono);
  font-size: 0.72rem;
  font-weight: 700;
  background-color: var(--color-bg-body);
  border: 1px solid var(--color-border-hover);
  color: var(--color-accent-light);
  padding: 0.15rem 0.4rem;
  border-radius: 4px;
}

.game-hud-actions {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.game-hud-btn {
  font-size: 0.78rem;
  font-weight: 600;
  padding: 0.35rem 0.75rem;
  border-radius: var(--radius-sm);
  background-color: var(--color-bg-card);
  border: 1px solid var(--color-border-hover);
  color: var(--color-text-main);
  transition: all var(--transition-fast);
}

.game-hud-btn:hover {
  background-color: var(--color-bg-subtle);
  border-color: var(--color-accent-light);
  color: #ffffff;
}

.game-hud-btn.danger:hover {
  border-color: #ef4444;
  color: #f87171;
}

/* Сенсорний інтерфейс створюється лише на пристроях із touch input. */
.game-touch-controls {
  position: fixed;
  inset: 0;
  z-index: 100;
  pointer-events: none;
}

body.game-mode-active .site-header:has(.site-nav.is-open) {
  z-index: 110;
}

.game-touch-joystick {
  position: absolute;
  left: calc(1rem + env(safe-area-inset-left, 0px));
  bottom: calc(1rem + env(safe-area-inset-bottom, 0px));
  width: 136px;
  height: 136px;
  border-radius: 50%;
  touch-action: none;
  pointer-events: auto;
  user-select: none;
  -webkit-user-select: none;
}

body.game-mode-active {
  touch-action: none;
}

.game-touch-joystick-ring,
.game-touch-joystick-knob {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  border-radius: 50%;
  pointer-events: none;
}

.game-touch-joystick-ring {
  width: 100%;
  height: 100%;
  border: 2px solid rgba(148, 163, 184, 0.48);
  background: rgba(30, 41, 59, 0.26);
  box-shadow: inset 0 0 0 1px rgba(255, 255, 255, 0.08);
}

.game-touch-joystick-knob {
  width: 58px;
  height: 58px;
  background: rgba(96, 165, 250, 0.42);
  border: 2px solid rgba(191, 219, 254, 0.68);
  box-shadow: 0 3px 12px rgba(0, 0, 0, 0.35);
  transform: translate(calc(-50% + var(--stick-x, 0px)), calc(-50% + var(--stick-y, 0px)));
  transition: transform 70ms linear;
}

.game-touch-charge {
  position: absolute;
  left: calc(1rem + env(safe-area-inset-left, 0px));
  bottom: calc(9.5rem + env(safe-area-inset-bottom, 0px));
  width: 136px;
  height: 9px;
  overflow: hidden;
  border: 1px solid rgba(191, 219, 254, 0.55);
  border-radius: var(--radius-full);
  background: rgba(15, 23, 42, 0.7);
}

.game-touch-charge[hidden] {
  display: none;
}

.game-touch-charge > span {
  display: block;
  width: var(--charge, 0%);
  height: 100%;
  border-radius: inherit;
  background: var(--color-accent-light);
  transition: width 50ms linear;
}

body.game-mode-active .game-mobile-toast {
  top: calc(var(--header-height) + 0.75rem + env(safe-area-inset-top, 0px));
  bottom: auto;
}

@media (max-width: 640px) {
  body.game-mode-active .game-hud {
    top: calc(var(--header-height) + 6rem + env(safe-area-inset-top, 0px));
    bottom: auto;
  }
}

@media (any-pointer: coarse) {
  body.game-mode-active .game-hud.is-collapsed {
    top: auto;
    right: calc(0.75rem + env(safe-area-inset-right, 0px));
    bottom: calc(0.75rem + env(safe-area-inset-bottom, 0px));
    left: auto;
    width: 44px;
    height: 44px;
    transform: none;
    z-index: 120;
  }

  body.game-mode-active .game-hud.is-collapsed .game-hud-toggle {
    width: 44px;
    height: 44px;
    opacity: 1;
    pointer-events: auto;
  }
}

/* Підсвічування мішеней у режимі гри */
body.game-mode-active [data-game-target] {
  position: relative;
  transition: box-shadow var(--transition-fast), outline var(--transition-fast);
}

/* Анімація влучання стріли в мішень */
.game-target-hit {
  animation: targetHitPulse 0.6s ease-out;
}

@keyframes targetHitPulse {
  0% {
    transform: scale(1);
    filter: brightness(1);
  }
  40% {
    transform: scale(1.04);
    filter: brightness(1.6);
    box-shadow: 0 0 25px rgba(113, 220, 255, 0.72);
  }
  100% {
    transform: scale(1);
    filter: brightness(1);
  }
}

/* Сповіщення для мобільних пристроїв */
.game-mobile-toast {
  position: fixed;
  bottom: 2rem;
  left: 50%;
  transform: translateX(-50%) translateY(30px);
  background-color: var(--color-bg-card);
  border: 1px solid var(--color-accent-light);
  color: var(--color-text-main);
  padding: 0.85rem 1.25rem;
  border-radius: var(--radius-md);
  font-size: 0.88rem;
  box-shadow: var(--shadow-card);
  opacity: 0;
  visibility: hidden;
  transition: all var(--transition-normal);
  z-index: 200;
  max-width: 90vw;
  text-align: center;
  pointer-events: none;
}

.game-mobile-toast.visible {
  opacity: 1;
  visibility: visible;
  transform: translateX(-50%) translateY(0);
}

/* Prism Motion presentation, shared by the portfolio and showroom. */
@property --prism-beam-angle {
  syntax: "<angle>";
  inherits: false;
  initial-value: 0deg;
}

html, body {
  font-family: var(--font-family-base);
}

.hero-title,
.section-title,
.work-title,
.card-title,
.demo-title,
.summary-title,
.footer-name {
  font-family: var(--font-family-display);
}

.hero-title {
  font-size: clamp(2.7rem, 7.1vw, 5.65rem);
  line-height: 1.04;
  letter-spacing: -0.055em;
  font-weight: 600;
}

.section-title {
  font-size: clamp(2rem, 4.1vw, 3.15rem);
  line-height: 1.1;
  letter-spacing: -0.04em;
}

.skip-link,
.brand-monogram,
.btn-primary,
.lang-btn.active,
body.game-mode-active .game-toggle-btn {
  color: #07131b;
}

.site-header {
  background-color: rgba(9, 13, 20, 0.88);
  border-bottom-color: rgba(156, 170, 187, 0.13);
}

.hero-section {
  padding-top: calc(var(--header-height) + 3rem);
  padding-bottom: 6.5rem;
  background: radial-gradient(ellipse at 78% 8%, rgba(113, 220, 255, 0.13), transparent 36%),
              radial-gradient(ellipse at 75% 44%, rgba(185, 147, 255, 0.09), transparent 34%),
              var(--color-bg-body);
}

.hero-grid {
  gap: clamp(2rem, 5vw, 5rem);
}

.section {
  padding-top: clamp(4.5rem, 8vw, 7rem);
  padding-bottom: clamp(4.5rem, 8vw, 7rem);
}

.works-section {
  background-color: #0b1119;
  border-color: rgba(156, 170, 187, 0.13);
}

.work-card,
.card,
.hero-interactive-card,
.demo-card,
.estimator-summary,
.tasks-app-container,
.contacts-card {
  border-radius: var(--radius-lg);
  background-color: var(--color-bg-card);
  border-color: rgba(156, 170, 187, 0.17);
}

.work-card {
  position: relative;
  isolation: isolate;
  overflow: hidden;
  transform-style: preserve-3d;
  transition: border-color 250ms ease, box-shadow 260ms ease, transform 320ms cubic-bezier(.2,.7,.2,1);
  box-shadow: 0 14px 36px rgba(0, 0, 0, 0.17);
}

.work-card::before {
  content: "";
  position: absolute;
  inset: 0;
  z-index: 0;
  border-radius: inherit;
  pointer-events: none;
  opacity: 0;
  background: radial-gradient(240px circle at var(--prism-x, 50%) var(--prism-y, 50%), rgba(113, 220, 255, 0.2), transparent 70%);
  transition: opacity 220ms ease;
}

.work-card > * {
  position: relative;
  z-index: 1;
}

.work-title,
.card-title {
  letter-spacing: -0.025em;
}

.work-tags span,
.work-status-badge {
  border-radius: var(--radius-full);
}

.btn-primary {
  position: relative;
  isolation: isolate;
  background: linear-gradient(115deg, #71dcff, #a7eaff);
  border-color: transparent;
  box-shadow: 0 8px 24px rgba(113, 220, 255, 0.16);
  transition: transform 220ms cubic-bezier(.2,.7,.2,1), box-shadow 220ms ease, background-color 220ms ease;
}

.btn-outline {
  transition: transform 220ms cubic-bezier(.2,.7,.2,1), box-shadow 220ms ease, color 220ms ease, border-color 220ms ease, background-color 220ms ease;
}

.btn-primary:hover,
.btn-primary:focus-visible {
  color: #07131b;
  background: linear-gradient(115deg, #a7eaff, #cbb5ff);
  border-color: transparent;
}

.btn-primary:focus-visible {
  box-shadow: 0 0 0 3px rgba(113, 220, 255, 0.34), 0 10px 28px rgba(113, 220, 255, 0.23);
}

.btn-outline:focus-visible {
  box-shadow: 0 0 0 3px rgba(113, 220, 255, 0.34);
}

@media (hover: hover) and (pointer: fine) and (prefers-reduced-motion: no-preference) {
  .btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 10px 28px rgba(113, 220, 255, 0.23);
  }

  .btn-outline:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 24px rgba(113, 220, 255, 0.12);
  }
}

.hero-interactive-card {
  animation: prismHeroFloat 8s ease-in-out infinite reverse;
}

.hero-widget-wrapper {
  transform: perspective(700px) rotateY(-12deg) rotateX(5deg);
  transform-origin: center;
  transform-style: preserve-3d;
}

@keyframes prismHeroFloat {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-9px); }
}

.prism-beam::after {
  content: "";
  position: absolute;
  inset: -1px;
  z-index: 2;
  padding: 1px;
  border-radius: inherit;
  pointer-events: none;
  background: conic-gradient(from var(--prism-beam-angle), transparent 0 72%, #71dcff 81%, #b993ff 87%, transparent 94% 100%);
  -webkit-mask: linear-gradient(#fff 0 0) content-box, linear-gradient(#fff 0 0);
  -webkit-mask-composite: xor;
  mask: linear-gradient(#fff 0 0) content-box, linear-gradient(#fff 0 0);
  mask-composite: exclude;
  animation: prismBeamSpin 7s linear infinite;
}

@keyframes prismBeamSpin {
  to { --prism-beam-angle: 360deg; }
}

.prism-reveal {
  opacity: 0;
  filter: blur(7px);
  transform: translateY(14px);
  transition: opacity 620ms ease, filter 620ms ease, transform 620ms cubic-bezier(.2,.7,.25,1);
}

.prism-reveal.is-visible,
.prism-reveal:focus-within {
  opacity: 1;
  filter: none;
  transform: none;
}

body.game-mode-active .prism-reveal,
body.game-mode-active .work-card,
body.game-mode-active .hero-interactive-card,
body.game-mode-active .hero-widget-wrapper {
  opacity: 1 !important;
  filter: none !important;
  transform: none !important;
  animation: none !important;
  transition: none !important;
}

body.game-mode-active .hero-widget-wrapper {
  perspective: none !important;
}

body.game-mode-active .work-card::before {
  opacity: 0 !important;
}

body.game-mode-active .btn:hover,
body.game-mode-active .btn:focus-visible {
  transform: none !important;
}

@media (hover: hover) and (pointer: fine) and (prefers-reduced-motion: no-preference) {
  .work-card:hover {
    border-color: rgba(113, 220, 255, 0.42);
    box-shadow: 0 24px 54px rgba(0, 0, 0, 0.34), 0 0 32px rgba(113, 220, 255, 0.07);
  }

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

@media (max-width: 768px) {
  .hero-section {
    padding-top: calc(var(--header-height) + 1.5rem);
    padding-bottom: 4.5rem;
  }

  .hero-widget-wrapper {
    transform: perspective(700px) rotateY(-5deg) rotateX(2deg);
  }

  .hero-title {
    font-size: clamp(2.55rem, 10.5vw, 4rem);
  }
}

@media (prefers-reduced-motion: reduce) {
  .work-card,
  .work-card::before,
  .hero-interactive-card,
  .prism-beam::after,
  .prism-reveal {
    animation: none !important;
    transition: none !important;
  }

  .prism-reveal {
    opacity: 1;
    filter: none;
    transform: none;
  }
}