:root {
  --brand-telegram: #0877a8;
  --brand-gmail: #ea4335;
  --brand-discord: #5865f2;
  --brand-x: #276678;
  --brand-tilda: #f58b45;
  --brand-python: #3776ab;
  --brand-n8n: #c24454;
  --brand-postgresql: #4169e1;
  --brand-docker: #086dd7;
  --brand-mongodb: #138546;
  --brand-instagram: #c13584;
  --brand-figma: #e54b33;
  --radius-tile: 24px;
  --radius-action: 8px;
  --motion-enter: 600ms;
  --motion-slide: 650ms;
  --motion-ease: cubic-bezier(.22, .68, .2, 1);
}
.brand-telegram { color: var(--brand-telegram); }
.brand-gmail { color: var(--brand-gmail); }
.brand-discord { color: var(--brand-discord); }
.brand-x { color: var(--brand-x); }
.brand-tilda { color: var(--brand-tilda); }
.brand-python { color: var(--brand-python); }
.brand-n8n { color: var(--brand-n8n); }
.brand-postgresql { color: var(--brand-postgresql); }
.brand-docker { color: var(--brand-docker); }
.brand-mongodb { color: var(--brand-mongodb); }
.brand-instagram { color: var(--brand-instagram); }
.brand-figma { color: var(--brand-figma); }

/* The slide stage keeps the document ratio; its toolbar occupies its own row. */
.deck-preview { position: relative; overflow: hidden; width: 100%; background: var(--ink); border-radius: var(--radius-media); isolation: isolate; }
.deck-stage { position: relative; width: 100%; aspect-ratio: 16 / 9; overflow: hidden; perspective: 1600px; background: var(--ink); }
.deck-slide { position: absolute; inset: 0; display: block; width: 100%; height: 100%; object-fit: contain; opacity: 0; transform: translateX(5%) rotateY(6deg); transform-origin: center; transition: opacity var(--motion-slide) var(--motion-ease), transform var(--motion-slide) var(--motion-ease); backface-visibility: hidden; pointer-events: none; }
.deck-slide.is-active { opacity: 1; transform: translateX(0) rotateY(0); z-index: 2; }
.deck-slide.is-leaving { opacity: 0; transform: translateX(-5%) rotateY(-6deg); z-index: 1; }
.deck-toolbar { display: flex; align-items: center; justify-content: space-between; gap: var(--space-4); min-height: 56px; padding: var(--space-2) var(--space-4); border-top: 1px solid var(--line); background: var(--paper); color: var(--ink); }
.deck-label, .deck-count { font-size: var(--text-label); line-height: 1.5; color: var(--muted); }
.deck-controls { display: flex; align-items: center; gap: var(--space-2); flex: none; }
.deck-control { display: inline-flex; align-items: center; justify-content: center; width: 36px; height: 36px; padding: 0; border: 1px solid var(--line); border-radius: var(--radius-small); background: transparent; color: var(--ink); cursor: pointer; transition: background var(--duration) var(--ease), border-color var(--duration) var(--ease); }
.deck-control:hover { background: var(--subtle); border-color: var(--muted); }
.deck-control[aria-pressed="true"] { background: var(--subtle); color: var(--accent-ink); }
.deck-control:disabled { opacity: .45; cursor: default; }
.deck-control .icon { width: 18px; height: 18px; }
.deck-count { min-width: 40px; text-align: center; font-variant-numeric: tabular-nums; }
.deck-progress { height: 3px; overflow: hidden; background: var(--line); }
.deck-progress-fill { display: block; width: 0; height: 100%; background: var(--accent-ink); transition: width var(--motion-slide) var(--motion-ease); }
.case-deck { margin-top: var(--space-7); }
.project-caption-link { display: block; min-width: 0; }
.compact-deck .deck-stage { height: 100%; aspect-ratio: auto; }
.compact-deck:focus-visible { outline: 2px solid var(--accent-ink); outline-offset: 3px; }
.case-block h2, .case-results h2 { display: flex; align-items: center; gap: var(--space-3); }
.case-block h2 .icon, .case-results h2 .icon { color: var(--accent-ink); }
.case-passport dt { display: flex; align-items: center; gap: var(--space-2); }
.case-passport dt .icon { width: 16px; height: 16px; }
.deck-caption { color: var(--muted); font-size: var(--text-small); margin-top: var(--space-4); }
.deck-control:focus-visible { outline: 2px solid var(--accent-ink); outline-offset: 3px; }
.case-results.is-highlight .stat-value { font-size: 48px; color: var(--accent-ink); }
.project-social-link { padding: var(--space-2) var(--space-3); background: var(--subtle); border-radius: var(--radius-small); text-decoration: none; }
.project-links--lead { margin-top: var(--space-5); }

.profile-description, .profile-footnote { display: none; }
.profile .section-nav { margin-top: var(--space-5); }
.profile .nav-link { min-height: 40px; }
.profile-bottom { padding-top: var(--space-4); }
.contact-dock { min-height: 200px; margin-top: var(--space-4); }
.contact-card { width: 100%; color: var(--ink); }
.contact-card h2, .contact-card .contact-title { margin: 0; font-family: var(--font-display); font-weight: var(--weight-strong); font-size: 24px; line-height: 1.1; letter-spacing: -.03em; }
.contact-card .contact-actions { display: flex; flex-direction: column; align-items: stretch; gap: var(--space-2); margin-top: var(--space-4); }
.contact-card .button { justify-content: flex-start; width: 100%; min-height: 44px; padding: var(--space-2) var(--space-4); border-radius: var(--radius-action); font-weight: var(--weight-strong); }
.contact-card .button[href*="t.me"], .contact-card .button-telegram { background: var(--accent); border-color: var(--accent); color: var(--ink); }
.contact-card .button[href*="t.me"]:hover, .contact-card .button-telegram:hover { border-color: var(--ink); }
.contact-card .button[href*="t.me"] .icon, .contact-card .button-telegram .icon { color: inherit; }
.contact-card .button[href^="mailto:"], .contact-card .button-gmail { background: var(--ink); border-color: var(--ink); color: var(--paper); }
.contact-card .button[href^="mailto:"]:hover, .contact-card .button-gmail:hover { background: var(--accent-ink); border-color: var(--accent-ink); }
.contact-card .button[href^="mailto:"] .icon, .contact-card .button-gmail .icon { color: inherit; }
.contact-stage { width: 100%; max-width: 1600px; min-height: 440px; margin: 0 auto; padding: var(--space-7); }
.contact-stage.is-docked { min-height: 440px; }
.contact-stage .contact-card { border: 1px solid var(--line); border-radius: var(--radius-tile); }
.contact-card.is-wide { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1fr); align-items: center; gap: var(--space-6); width: 100%; padding: var(--space-7); background: var(--subtle); }
.contact-card.is-wide h2, .contact-card.is-wide .contact-title { font-size: clamp(40px, 4.3vw, 64px); line-height: 1.08; }
.contact-card.is-wide .contact-actions { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); align-items: stretch; gap: var(--space-3); margin-top: 0; }
.contact-card.is-wide .button { min-height: 48px; justify-content: center; }
.site-footer { display: flex; align-items: center; justify-content: space-between; flex-wrap: wrap; gap: var(--space-4); width: 100%; max-width: 1600px; margin: 0 auto; padding: var(--space-5) var(--space-7); color: var(--muted); font-size: var(--text-label); }
.site-footer a { display: inline-flex; align-items: center; gap: var(--space-2); min-height: var(--control-height); }
.site-footer a:hover { color: var(--accent-ink); }

.motion-item { opacity: 0; transform: translateY(24px); transition: opacity var(--motion-enter) var(--motion-ease), transform var(--motion-enter) var(--motion-ease); }
.motion-item.is-visible { opacity: 1; transform: translateY(0); }

.book-buy-links { display: flex; align-items: center; gap: var(--space-2); margin-top: var(--space-2); }
.book-buy-links a { display: inline-flex; align-items: center; justify-content: center; flex: none; width: var(--control-height); height: var(--control-height); border-radius: var(--radius-media); transition: opacity var(--duration) var(--ease); }
.retailer-app-icon { display: block; flex: none; width: 32px; height: 32px; object-fit: contain; border-radius: var(--radius-media); }
.book-buy-links a:hover { opacity: .75; }
.course-title-link { display: inline-flex; align-items: center; gap: var(--space-2); }
.course-title-link .icon, .course-row h3 a .icon { width: 16px; height: 16px; }
.course-row h3 a { display: inline-flex; align-items: center; gap: var(--space-2); }
.course-title-link:hover, .course-row h3 a:hover { color: var(--accent-ink); }

@media (min-width: 901px) and (max-height: 800px) {
  :root { --page-top: var(--space-6); }
  .profile h1, .profile-name { font-size: 48px; }
  .profile .section-nav { margin-top: var(--space-4); }
  .profile .nav-link { min-height: 36px; }
  .profile-bottom { padding-top: var(--space-4); }
  .contact-card h2, .contact-card .contact-title { font-size: 22px; }
  .metrics { margin-top: var(--space-4); }
  .metrics .stat-value { font-size: 30px; }
  .metrics .stat-label { font-size: var(--text-label); line-height: 1.4; }
  .metrics .stat-context { font-size: 11px; }
  .work-section .section-heading { margin-bottom: var(--space-2); }
  .work-section > h2 { font-size: 28px; margin-bottom: var(--space-4); }
  .project-featured { padding-block: var(--space-4); }
}
@media (min-width: 901px) and (max-width: 1100px) {
  .contact-card.is-wide { padding: var(--space-6); }
  .contact-card.is-wide .contact-actions { grid-template-columns: 1fr; }
}
@media (min-width: 901px) and (max-height: 700px) {
  .profile h1, .profile-name { font-size: 40px; }
  .profile-role { font-size: 18px; margin-top: var(--space-4); }
  .profile .nav-link { min-height: 32px; }
  .profile-bottom { padding-top: var(--space-2); }
  .contact-dock { min-height: 180px; margin-top: var(--space-3); }
  .contact-card h2 { font-size: 18px; }
  .metrics { margin-top: var(--space-3); padding-block: var(--space-3); }
  .metrics .stat-value { font-size: 28px; }
  .metrics .stat-label { margin-top: var(--space-2); }
  .work-section .section-heading { margin-bottom: var(--space-1); }
  .work-section > h2 { margin-bottom: var(--space-3); }
  .metrics { padding-block: var(--space-2); }
  .project-description { margin-top: var(--space-2); line-height: 1.5; }
  .project-results { gap: var(--space-1); margin-top: var(--space-2); }
  .project-result { font-size: 13px; }
  .project-featured:first-child { padding-block: var(--space-3); }
}
@media (max-width: 900px) {
  .contact-dock { display: none; }
  .contact-stage { min-height: 0; padding: var(--space-5); }
  .contact-stage.is-docked { min-height: 0; }
  .contact-card.is-wide { grid-template-columns: 1fr; padding: var(--space-6); gap: var(--space-6); }
  .contact-card.is-wide h2, .contact-card.is-wide .contact-title { font-size: clamp(40px, 6vw, 56px); }
  .contact-card.is-wide .contact-actions { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .case-page .contact-card { display: none; }
  .site-footer { padding-inline: var(--space-5); }
  .deck-control { width: 40px; height: 40px; }
  .profile { margin-bottom: var(--space-6); padding-bottom: var(--space-5); }
}
@media (max-width: 520px) {
  .deck-toolbar { gap: var(--space-2); padding-inline: var(--space-3); }
  .deck-controls { gap: var(--space-1); }
  .deck-label { max-width: 120px; }
  .contact-card.is-wide { padding: var(--space-5); }
  .contact-card.is-wide .contact-actions { grid-template-columns: 1fr; }
  .contact-card.is-wide .button { justify-content: flex-start; }
  .case-results.is-highlight .stat-value { font-size: 40px; }
  .profile h1 { font-size: 30px; line-height: 1.1; }
  .profile-name-line { display: inline; }
  body:not(.case-page) .profile-role { display: none; }
  .profile .section-nav { margin-top: var(--space-4); }
  .profile .profile-bottom { margin-top: var(--space-3); }
  .case-page .profile-top { flex-wrap: wrap; gap: var(--space-3); }
  .case-page .profile-role { font-size: var(--text-small); }
  .project-featured { display: grid; grid-template-columns: 1fr; gap: var(--space-5); }
  .karta-gallery { grid-template-columns: 1fr; padding: var(--space-5); }
  .karta-card-showcase { max-width: 320px; margin: auto; }
  .karta-app-showcase img { max-height: 460px; }
  .work-video-grid { grid-template-columns: 1fr; gap: var(--space-6); }
  .prototype-work { grid-template-columns: 1fr; padding: var(--space-5); }
  .prototype-preview img { max-height: 460px; }
}
@media (max-width: 650px) {
  .toolkit-row { grid-template-columns: 1fr; gap: var(--space-3); }
  .toolkit-row h3 { padding-top: 0; }
  .skill-list { grid-template-columns: 1fr; }
  .skill summary { min-height: 300px; }
}
@media (prefers-reduced-motion: reduce) {
  .motion-item, .motion-item.is-visible { opacity: 1; transform: none; transition: none; }
  .deck-slide { transform: none; transition: none; }
  .deck-slide.is-active { opacity: 1; transform: none; }
  .deck-slide.is-leaving { opacity: 0; transform: none; }
  .deck-progress-fill { transition: none; }
}