/* ═══════════════════════════════════════════════════════════════
   shared.css — PASS Architekci
   Używane przez: index.html, projekty.html, o-nas.html,
                  projekty/*.html
   ═══════════════════════════════════════════════════════════════ */

/* ─── FONT: Outfit (self-hosted, latin + latin-ext) ─── */
@font-face {
  font-family: 'Outfit';
  font-style: normal;
  font-weight: 300;
  font-display: swap;
  src: url("../fonts/outfit-300.woff2") format("woff2");
}
@font-face {
  font-family: 'Outfit';
  font-style: normal;
  font-weight: 400;
  font-display: swap;
  src: url("../fonts/outfit-400.woff2") format("woff2");
}
@font-face {
  font-family: 'Outfit';
  font-style: normal;
  font-weight: 500;
  font-display: swap;
  src: url("../fonts/outfit-500.woff2") format("woff2");
}

/* ─── RESET ─── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
[hidden] { display: none !important; }
html { font-size: 16px; scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } }
img, video, svg { display: block; max-width: 100%; }
a { color: inherit; text-decoration: none; }
button { cursor: pointer; border: none; background: none; font: inherit; color: inherit; }
input, textarea { font: inherit; color: inherit; }
h1, h2, h3, h4 { font-weight: 300; text-wrap: balance; }

/* ─── TOKENY ─── */
:root {
  --c-bg:           oklch(17% 0.008 258);
  --c-bg-2:         oklch(22% 0.008 258);
  --c-bg-3:         oklch(29% 0.006 258);
  --c-bg-light:     oklch(95% 0.006 80);
  --c-text:         oklch(95% 0.006 80);
  --c-text-2:       oklch(62% 0.006 258);
  --c-text-dark:    oklch(17% 0.008 258);
  --c-accent:       oklch(77% 0.05 75);
  --c-accent-hover: oklch(83% 0.05 75);

  --font: 'Outfit', system-ui, sans-serif;

  --fz-display:  clamp(2rem, 3.8vw, 3.25rem);
  --fz-headline: clamp(1.625rem, 3.2vw, 2.5rem);
  --fz-title:    clamp(1rem, 1.4vw, 1.1875rem);
  --fz-body:     1rem;
  --fz-label:    0.6875rem;
  --fz-small:    0.9375rem;
  --fz-micro:    0.625rem;

  --fw-thin:    100;
  --fw-light:   300;
  --fw-regular: 400;
  --fw-medium:  500;

  --lh-tight: 1.05;
  --lh-snug:  1.2;
  --lh-body:    1.65;
  --lh-relaxed: 1.7;
  --ls-label: 0.1em;

  --sp-xs:  0.5rem;
  --sp-sm:  1rem;
  --sp-md:  2rem;
  --sp-lg:  3.5rem;
  --sp-xl:  7rem;
  --sp-2xl: 11rem;
  --sp-section: clamp(5rem, 11vh, 9rem);

  --gutter:    clamp(1.25rem, 5vw, 3.5rem);
  --container: 90rem;
  --radius:    2px;

  --ease-out-quart: cubic-bezier(0.25, 1, 0.5, 1);
  --dur-fast:  200ms;
  --dur-base:  300ms;
  --dur-slow:  600ms;
  --dur-enter: 800ms;
}

/* ─── FALLBACK: browsers without oklch (Chrome <111, Safari <15.4) ─── */
@supports not (color: oklch(0 0 0)) {
  :root {
    --c-bg:           #1b1c23;
    --c-bg-2:         #24262f;
    --c-bg-3:         #3a3d49;
    --c-bg-light:     #f4f2ee;
    --c-text:         #f4f2ee;
    --c-text-2:       #8f9099;
    --c-text-dark:    #1b1c23;
    --c-accent:       #c9aa86;
    --c-accent-hover: #d5ba98;
  }
}

/* ─── BASE ─── */
body {
  background-color: var(--c-bg);
  color: var(--c-text);
  font-family: var(--font);
  font-weight: var(--fw-light);
  font-size: var(--fz-body);
  line-height: var(--lh-body);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
}

::selection { background-color: var(--c-accent); color: var(--c-text-dark); }
:focus-visible { outline: 2px solid var(--c-accent); outline-offset: 3px; }

/* ─── UTILITIES ─── */
.sr-only {
  position: absolute; width: 1px; height: 1px;
  padding: 0; margin: -1px; overflow: hidden;
  clip: rect(0,0,0,0); white-space: nowrap; border: 0;
}

/* ─── SKIP LINK ─── */
.skip-link {
  position: absolute; top: -100%; left: 1rem; z-index: 9999;
  padding: 0.75rem 1.5rem;
  background: var(--c-accent); color: var(--c-text-dark);
  font-size: var(--fz-label); font-weight: var(--fw-medium);
  letter-spacing: var(--ls-label); text-transform: uppercase;
  text-decoration: none; transition: top 0.15s;
}
.skip-link:focus { top: 0.5rem; }

.container {
  max-width: var(--container);
  margin-inline: auto;
  padding-inline: var(--gutter);
}

.section { padding-block: var(--sp-section); }

.label {
  font-size: var(--fz-label);
  font-weight: var(--fw-medium);
  letter-spacing: var(--ls-label);
  text-transform: uppercase;
  color: var(--c-text-2);
}
.label--light  { color: var(--c-accent); }
.label--on-light { color: oklch(50% 0.006 258); }

/* ─── BUTTONS ─── */
.btn-primary {
  display: inline-flex; align-items: center; gap: 0.6rem;
  padding: 0.9375rem 2.25rem;
  background-color: var(--c-accent);
  color: var(--c-text-dark);
  font-family: var(--font);
  font-size: var(--fz-label);
  font-weight: var(--fw-medium);
  letter-spacing: var(--ls-label);
  text-transform: uppercase;
  border-radius: var(--radius);
  border: 1px solid transparent;
  transition: transform var(--dur-fast) var(--ease-out-quart),
              background-color var(--dur-fast) var(--ease-out-quart),
              box-shadow var(--dur-fast) var(--ease-out-quart);
  white-space: nowrap;
}
.btn-primary:hover {
  background-color: var(--c-accent-hover);
  transform: translateY(-1px);
  box-shadow: 0 4px 20px oklch(77% 0.05 75 / 0.22);
}
.btn-primary:active { transform: translateY(0); box-shadow: none; }

.btn-ghost {
  display: inline-flex; align-items: center; gap: 0.6rem;
  padding: 0.9375rem 2.25rem;
  background-color: transparent;
  color: var(--c-text);
  font-family: var(--font);
  font-size: var(--fz-label);
  font-weight: var(--fw-medium);
  letter-spacing: var(--ls-label);
  text-transform: uppercase;
  border-radius: var(--radius);
  border: 1px solid oklch(95% 0.006 80 / 0.4);
  transition: opacity var(--dur-fast) var(--ease-out-quart),
              transform var(--dur-fast) var(--ease-out-quart),
              border-color var(--dur-fast) var(--ease-out-quart);
  white-space: nowrap;
}
.btn-ghost:hover { opacity: 0.75; border-color: oklch(95% 0.006 80 / 0.7); transform: translateY(-1px); }

.btn-ghost--dark {
  color: var(--c-text-dark);
  border-color: oklch(17% 0.008 258 / 0.4);
}
.btn-ghost--dark:hover { border-color: oklch(17% 0.008 258 / 0.7); }

/* ─── ANIMACJE ─── */
@keyframes hero-enter {
  from { opacity: 0; transform: translateY(28px); }
  to   { opacity: 1; transform: translateY(0); }
}
@keyframes scroll-breathe {
  0%, 100% { opacity: 0.3; }
  50%       { opacity: 0.8; }
}
@keyframes shake {
  0%, 100% { transform: translateX(0); }
  15%  { transform: translateX(-7px); }
  30%  { transform: translateX(7px); }
  45%  { transform: translateX(-5px); }
  60%  { transform: translateX(5px); }
  75%  { transform: translateX(-2px); }
  90%  { transform: translateX(2px); }
}
@keyframes draw-circle {
  to { stroke-dashoffset: 0; }
}
@keyframes draw-check {
  to { stroke-dashoffset: 0; }
}
@keyframes success-enter {
  from { opacity: 0; transform: translateY(16px); }
  to   { opacity: 1; transform: translateY(0); }
}

/* Hero entrance */
.hero__label, .hero__headline, .hero__actions, .hero__scroll {
  opacity: 0;
  animation: hero-enter 900ms var(--ease-out-quart) forwards;
}
.hero__label    { animation-delay: 150ms; }
.hero__headline { animation-delay: 380ms; }
.hero__actions  { animation-delay: 640ms; }
.hero__scroll   { animation-delay: 950ms; }

.hero__scroll-line { animation: scroll-breathe 2.4s ease-in-out infinite; animation-delay: 1.4s; }

/* Scroll reveal */
.reveal {
  opacity: 0;
  transform: translateY(22px);
  transition: opacity var(--dur-enter) var(--ease-out-quart),
              transform var(--dur-enter) var(--ease-out-quart);
}
.reveal.is-visible { opacity: 1; transform: translateY(0); }
.reveal[data-delay="1"] { transition-delay: 80ms; }
.reveal[data-delay="2"] { transition-delay: 160ms; }
.reveal[data-delay="3"] { transition-delay: 240ms; }
.reveal[data-delay="4"] { transition-delay: 320ms; }

/* Form */
.field__input.shake { animation: shake 400ms var(--ease-out-quart); }
.form-success:not([hidden]) { animation: success-enter 600ms var(--ease-out-quart) both; }
.form-success__icon circle {
  stroke-dasharray: 96; stroke-dashoffset: 96;
  animation: draw-circle 550ms var(--ease-out-quart) 100ms forwards;
}
.form-success__icon path {
  stroke-dasharray: 28; stroke-dashoffset: 28;
  animation: draw-check 400ms var(--ease-out-quart) 550ms forwards;
}

@media (prefers-reduced-motion: reduce) {
  .hero__label, .hero__headline, .hero__actions, .hero__scroll { opacity: 1; animation: none; }
  .hero__scroll-line { animation: none; opacity: 0.5; }
  .reveal { opacity: 1; transform: none; transition: none; }
  .field__input.shake { animation: none; }
  .form-success:not([hidden]) { animation: none; }
  .form-success__icon circle, .form-success__icon path { animation: none; stroke-dashoffset: 0; }
}

/* ─── NAV ─── */
.nav {
  position: fixed; top: 0; left: 0; right: 0; z-index: 100;
  transition: background-color var(--dur-base) var(--ease-out-quart),
              box-shadow var(--dur-base) var(--ease-out-quart);
}
.nav.scrolled {
  background-color: oklch(17% 0.008 258 / 0.96);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  box-shadow: 0 1px 0 oklch(95% 0.006 80 / 0.06);
}
.nav__inner {
  display: flex; align-items: center; gap: var(--sp-md);
  height: 4.5rem;
  max-width: none; margin-inline: 0;
  padding-inline: var(--gutter);
}
.nav__logo { display: flex; align-items: center; flex-shrink: 0; }
.nav__logo-img {
  height: 24px; width: auto; display: block;
  filter: invert(1); mix-blend-mode: screen; opacity: 0.9;
  transition: opacity var(--dur-fast) var(--ease-out-quart);
}
.nav__logo:hover .nav__logo-img { opacity: 1; filter: invert(1) brightness(1.15); }

.nav__links { display: flex; gap: var(--sp-lg); margin-left: auto; list-style: none; }
.nav__link {
  font-size: var(--fz-label); font-weight: var(--fw-medium);
  letter-spacing: var(--ls-label); text-transform: uppercase;
  color: var(--c-text); opacity: 0.85;
  transition: opacity var(--dur-fast) var(--ease-out-quart);
}
.nav__link:hover { opacity: 1; }
.nav__link--active { opacity: 1; }

.nav__cta { padding: 0.625rem 1.5rem; font-size: 0.625rem; margin-left: var(--sp-md); }

.nav__toggle {
  display: none; flex-direction: column; justify-content: center;
  gap: 6px; width: 2.75rem; height: 2.75rem;
  margin-left: auto; padding: 0.25rem;
}
.nav__toggle-bar {
  display: block; width: 100%; height: 1px;
  background-color: var(--c-text);
  transition: transform var(--dur-base) var(--ease-out-quart),
              opacity var(--dur-base) var(--ease-out-quart);
  transform-origin: center;
}
.nav__toggle[aria-expanded="true"] .nav__toggle-bar:nth-child(1) { transform: translateY(3.5px) rotate(45deg); }
.nav__toggle[aria-expanded="true"] .nav__toggle-bar:nth-child(2) { transform: translateY(-3.5px) rotate(-45deg); }

/* Mobile overlay */
.nav-overlay {
  position: fixed; inset: 0; z-index: 99;
  background-color: var(--c-bg);
  display: flex; flex-direction: column; justify-content: center;
  padding: var(--sp-2xl) var(--gutter) var(--sp-xl);
  pointer-events: none; opacity: 0; visibility: hidden; transform: translateY(-8px);
  transition: opacity var(--dur-base) var(--ease-out-quart),
              transform var(--dur-base) var(--ease-out-quart),
              visibility 0s var(--dur-base);
}
.nav-overlay.is-open { pointer-events: all; opacity: 1; visibility: visible; transform: translateY(0); transition-delay: 0s; }
.nav-overlay__nav { display: flex; flex-direction: column; gap: var(--sp-sm); }
.nav-overlay__link {
  font-size: clamp(2.25rem, 8vw, 3.5rem); font-weight: var(--fw-light);
  line-height: 1.1; color: var(--c-text);
  transition: opacity var(--dur-fast) var(--ease-out-quart);
}
.nav-overlay__link:hover { opacity: 0.45; }
.nav-overlay__footer { margin-top: auto; padding-top: var(--sp-xl); }
.nav-overlay__email {
  font-size: var(--fz-label); letter-spacing: var(--ls-label); text-transform: uppercase;
  color: var(--c-text-2); transition: color var(--dur-fast) var(--ease-out-quart);
}
.nav-overlay__email:hover { color: var(--c-text); }

@media (max-width: 980px) {
  .nav__links, .nav__cta { display: none; }
  .nav__toggle { display: flex; }
}

/* ─── FOOTER ─── */
.footer {
  background-color: oklch(14% 0.008 258);
  border-top: 1px solid oklch(95% 0.006 80 / 0.06);
  padding-top: clamp(3rem, 6vw, 5rem);
  padding-bottom: clamp(1.5rem, 3vw, 2.5rem);
}
.footer__inner {
  display: grid;
  grid-template-columns: 1.5fr 1fr 1fr auto;
  gap: clamp(2rem, 4vw, 4rem);
  align-items: start;
  padding-bottom: clamp(2rem, 4vw, 3.5rem);
  border-bottom: 1px solid oklch(95% 0.006 80 / 0.06);
  margin-bottom: clamp(1.5rem, 3vw, 2rem);
}
.footer__logo { display: block; margin-bottom: var(--sp-sm); width: fit-content; }
.footer__logo-img {
  height: 20px; width: auto; display: block;
  filter: invert(1); mix-blend-mode: screen; opacity: 0.6;
  transition: opacity var(--dur-fast) var(--ease-out-quart);
}
.footer__logo:hover .footer__logo-img { opacity: 0.9; }
.footer__tagline { font-size: 0.8125rem; line-height: 1.6; color: var(--c-text-2); }
.footer__nav, .footer__contact { display: flex; flex-direction: column; gap: 0.625rem; }
.footer__social { display: flex; flex-direction: row; gap: var(--sp-sm); align-items: flex-start; }
.footer__link {
  font-size: var(--fz-label); font-weight: var(--fw-medium);
  letter-spacing: 0.06em; text-transform: uppercase;
  color: var(--c-text-2); transition: color var(--dur-fast) var(--ease-out-quart);
  width: fit-content;
}
.footer__link:hover { color: var(--c-text); }
.footer__bottom {
  display: flex; justify-content: space-between; align-items: center;
  gap: var(--sp-md); flex-wrap: wrap;
}
.footer__copy { font-size: 0.75rem; color: var(--c-text-2); }
.footer__privacy { font-size: 0.625rem; letter-spacing: 0.08em; }

@media (max-width: 900px) {
  .footer__inner { grid-template-columns: 1fr 1fr; gap: var(--sp-lg); }
  .footer__brand { grid-column: 1 / 3; }
}
@media (max-width: 540px) {
  .footer__inner { grid-template-columns: 1fr; }
  .footer__brand { grid-column: 1; }
  .footer__nav .footer__link,
  .footer__contact .footer__link { padding: 0.375rem 0; display: inline-block; }
  .footer__social { gap: var(--sp-md); }
  .footer__social .footer__link { padding: 0.375rem 0; }
}

/* ─── SCROLL TO TOP ─── */
.scroll-top {
  position: fixed; bottom: 2rem; right: 2rem; z-index: 100;
  width: 2.75rem; height: 2.75rem;
  background: oklch(22% 0.008 258);
  border: 1px solid oklch(95% 0.006 80 / 0.12);
  color: var(--c-text-2);
  display: flex; align-items: center; justify-content: center;
  opacity: 0; visibility: hidden; transform: translateY(8px);
  transition: opacity 0.2s, visibility 0.2s, transform 0.2s var(--ease-out-quart),
              color var(--dur-fast), border-color var(--dur-fast);
}
.scroll-top.is-visible { opacity: 1; visibility: visible; transform: translateY(0); }
.scroll-top:hover { color: var(--c-text); border-color: oklch(95% 0.006 80 / 0.3); }
@media (max-width: 540px) { .scroll-top { bottom: 1.25rem; right: 1.25rem; } }

/* ═══════════════════════════════════════════════════════════════
   THEME D — BLANC ABSOLU
   ═══════════════════════════════════════════════════════════════ */
.theme-d {
  --c-bg:           oklch(97% 0.003 80);
  --c-bg-2:         oklch(92% 0.005 80);
  --c-bg-3:         oklch(85% 0.007 80);
  --c-bg-light:     oklch(99.5% 0.001 80);
  --c-text:         oklch(10% 0.008 258);
  --c-text-2:       oklch(40% 0.005 258);
  --c-text-dark:    oklch(10% 0.008 258);
  --c-accent:       oklch(10% 0.008 258);
  --c-accent-hover: oklch(4%  0.006 258);
}
.theme-d .label--light { color: oklch(42% 0.005 258); }
.theme-d .nav { background-color: oklch(97% 0.003 80 / 0.97); backdrop-filter: blur(12px); -webkit-backdrop-filter: blur(12px); }
.theme-d .nav.scrolled { box-shadow: 0 1px 0 oklch(10% 0.008 258 / 0.07); }
.theme-d .nav__logo-img { filter: none; mix-blend-mode: normal; opacity: 1; }
.theme-d .nav__logo:hover .nav__logo-img { opacity: 0.5; }
.theme-d .btn-primary { color: oklch(97% 0.003 80); }
.theme-d .btn-primary:hover { box-shadow: 0 4px 24px oklch(10% 0.008 258 / 0.22); }
/* Szampański akcent TYLKO na CTA w hero — reszta CTA zostaje czarno-biała */
.theme-d .hero .btn-primary { background-color: oklch(77% 0.05 75); color: oklch(17% 0.008 258); }
.theme-d .hero .btn-primary:hover { background-color: oklch(83% 0.05 75); box-shadow: 0 4px 24px oklch(77% 0.05 75 / 0.28); }
.theme-d .btn-ghost { border-color: oklch(10% 0.008 258 / 0.26); color: var(--c-text); }
.theme-d .btn-ghost:hover { border-color: oklch(10% 0.008 258 / 0.60); opacity: 1; }
.theme-d .footer { background-color: oklch(91% 0.006 80); border-top-color: oklch(10% 0.008 258 / 0.07); }
.theme-d .footer__inner { border-bottom-color: oklch(10% 0.008 258 / 0.07); }
.theme-d .footer__logo-img { filter: none; mix-blend-mode: normal; opacity: 0.70; }
.theme-d .footer__logo:hover .footer__logo-img { opacity: 1; }
.theme-d .scroll-top { background: oklch(92% 0.005 80); border-color: oklch(10% 0.008 258 / 0.12); }
.theme-d .scroll-top:hover { border-color: oklch(10% 0.008 258 / 0.32); }
.theme-d .filter-btn { border-color: oklch(10% 0.008 258 / 0.15); }
.theme-d .filter-btn:hover { color: var(--c-text); border-color: oklch(10% 0.008 258 / 0.40); }
.theme-d .filter-btn.is-active { background-color: var(--c-text); color: var(--c-bg); border-color: var(--c-text); }
.theme-d .projects-cta { border-top-color: oklch(10% 0.008 258 / 0.07); }
.theme-d .proj-tile__caption { background-color: oklch(97% 0.003 80 / 0.91); }
.theme-d .proj-tile:hover .proj-tile__caption { background-color: oklch(99.5% 0.001 80 / 0.97); }
.theme-d .proj-tile__num { color: oklch(44% 0.005 258); }
.theme-d .proj-tile__title { color: var(--c-text); }
.theme-d .proj-tile__cat { color: oklch(44% 0.005 258); }
.theme-d .proj-info { border-bottom-color: oklch(10% 0.008 258 / 0.07); }
.theme-d .proj-nav { border-top-color: oklch(10% 0.008 258 / 0.07); }
.theme-d .proj-hero__num { color: oklch(77% 0.05 75); }
.theme-d .proj-hero__title { color: oklch(95% 0.006 80); }
.theme-d .proj-hero__cat { color: oklch(62% 0.006 258); }
.theme-d .onas-values__grid { background-color: oklch(10% 0.008 258 / 0.07); }
.theme-d .onas-cta { background-color: oklch(90% 0.007 80); border-top-color: oklch(10% 0.008 258 / 0.07); }