/* ============================================================
   VALKYRIE.OOO — landing / under construction
   Two themes: 1·V (Первомай) and 9·V (День Победы)
   Switched by [data-theme] on <html>
   ============================================================ */

@import url('https://fonts.googleapis.com/css2?family=Russo+One&family=PT+Sans:wght@400;700&family=PT+Serif:ital@0;1&display=swap');

/* ─────────── Theme: 1·V Первомай (default) ─────────── */
:root,
:root[data-theme="mayday"] {
  --paper:      #f1e7d0;
  --paper-dark: #e3d3a8;
  --cream:      #fdf9ec;
  --red:        #be1e2d;
  --red-deep:   #8e1620;
  --red-bright: #d8242f;
  --black:      #1a1715;
  --ink:        #2b2520;
  --ochre:      #d4a017;
  --gold:       #e8b923;

  /* caution tape: ochre + black */
  --tape-a: var(--ochre);
  --tape-b: var(--black);

  /* image post-processing: bright */
  --img-filter: contrast(1.05) saturate(1.04);

  /* hero ::before/::after triple-stripe colors */
  --rule-mid: var(--red);
  --rule-side: var(--ochre);
}

/* ─────────── Theme: 9·V День Победы ─────────── */
:root[data-theme="victory"] {
  --paper:      #efe2bb;
  --paper-dark: #d8c388;
  --cream:      #f4e7c2;
  --red:        #8a1620;
  --red-deep:   #5a0d10;
  --red-bright: #a01b25;
  --black:      #14110d;
  --ink:        #2a221a;
  --ochre:      #a87c11;
  --gold:       #e8b500;

  /* caution tape: gvardeyskaya / Georgian ribbon — orange + black */
  --tape-a: #f08a00;
  --tape-b: #14110d;

  /* image post-processing: subtle warm sepia tilt */
  --img-filter: contrast(1.05) saturate(0.95) sepia(0.08);

  /* hero ::before/::after triple-stripe colors */
  --rule-mid: var(--gold);
  --rule-side: var(--red);
}

* { box-sizing: border-box; margin: 0; padding: 0; }

html, body { width: 100%; }

body {
  background: var(--paper);
  background-image:
    /* faint constructivist diagonal */
    linear-gradient(135deg, transparent 0 49.6%, rgba(190,30,45,0.04) 49.6% 50.4%, transparent 50.4% 100%),
    /* paper grain */
    radial-gradient(ellipse at 20% 25%, rgba(0,0,0,0.05), transparent 55%),
    radial-gradient(ellipse at 85% 75%, rgba(190,30,45,0.06), transparent 55%),
    radial-gradient(ellipse at 50% 50%, rgba(212,160,23,0.04), transparent 70%);
  color: var(--ink);
  font-family: "PT Sans", "Liberation Sans", system-ui, sans-serif;
  min-height: 100vh;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
  transition: background-color 0.4s ease, color 0.4s ease;
}

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

/* <picture> wraps avif+webp; treat it as transparent to layout so the inner
   <img> is positioned as if it were a direct child. Toggling [hidden] on
   <picture> still hides the whole subtree (display:none beats contents). */
picture { display: contents; }

/* Hide [hidden] reliably (some browsers leave it visible if display is set) */
[hidden] { display: none !important; }

/* ─────────── Caution tape strips (top/bottom of page) ─────────── */

.caution {
  height: 14px;
  background: repeating-linear-gradient(
    -45deg,
    var(--tape-a) 0 18px,
    var(--tape-b) 18px 36px
  );
  transition: background 0.4s ease;
}

/* Victory: George ribbon = horizontal stripes, not diagonal */
:root[data-theme="victory"] .caution {
  background: repeating-linear-gradient(
    90deg,
    var(--tape-a) 0 22px,
    var(--tape-b) 22px 36px
  );
  height: 16px;
}

/* ─────────── Top band: brand + theme switch + date ─────────── */

.band--top {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 1rem;
  padding: 0.9rem 2rem;
  background: var(--black);
  color: var(--cream);
  font-family: "Russo One", "PT Sans", sans-serif;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  border-bottom: 4px solid var(--red);
  transition: background-color 0.4s ease, border-color 0.4s ease;
}

:root[data-theme="victory"] .band--top {
  border-bottom: 4px solid var(--gold);
  box-shadow: inset 0 -8px 0 rgba(232, 181, 0, 0.08);
}

.brand {
  font-size: 1.1rem;
  color: var(--cream);
}

.brand__dot {
  color: var(--red-bright);
  font-weight: 900;
}

:root[data-theme="victory"] .brand__dot {
  color: var(--gold);
}

.date {
  font-size: 0.85rem;
  opacity: 0.85;
  letter-spacing: 0.25em;
}

/* ─────────── Theme switch pill ─────────── */

.theme-switch {
  display: inline-flex;
  border: 1.5px solid rgba(253, 249, 236, 0.3);
  border-radius: 999px;
  overflow: hidden;
  font-family: "Russo One", sans-serif;
  font-size: 0.78rem;
  letter-spacing: 0.2em;
  margin-left: auto;
  margin-right: 1rem;
  flex-shrink: 0;
}

.theme-switch__btn {
  appearance: none;
  background: transparent;
  border: none;
  color: var(--cream);
  opacity: 0.55;
  padding: 0.45rem 0.95rem;
  cursor: pointer;
  font: inherit;
  letter-spacing: inherit;
  text-transform: uppercase;
  transition: background-color 0.2s ease, opacity 0.2s ease, color 0.2s ease;
}

.theme-switch__btn:hover { opacity: 0.9; }

.theme-switch__btn.is-active {
  background: var(--red);
  opacity: 1;
}

:root[data-theme="victory"] .theme-switch__btn.is-active {
  background: var(--gold);
  color: var(--black);
}

.theme-switch__btn:focus-visible {
  outline: 2px solid var(--gold);
  outline-offset: 2px;
}

/* ─────────── Motto banner ─────────── */

.motto {
  background: var(--red);
  color: var(--cream);
  text-align: center;
  padding: 2.2rem 1rem;
  font-family: "Russo One", sans-serif;
  position: relative;
  overflow: hidden;
  transition: background-color 0.4s ease;
}

:root[data-theme="victory"] .motto {
  background:
    linear-gradient(180deg, rgba(232,181,0,0.08), transparent 30%, transparent 70%, rgba(232,181,0,0.08)),
    var(--red-deep);
  border-top: 2px solid var(--gold);
  border-bottom: 2px solid var(--gold);
}

.motto::before, .motto::after {
  content: '';
  position: absolute;
  top: 0;
  width: 50px;
  height: 100%;
  background: repeating-linear-gradient(
    90deg,
    var(--cream) 0 4px,
    transparent 4px 14px
  );
  opacity: 0.35;
}
.motto::before { left: 0; }
.motto::after { right: 0; transform: scaleX(-1); }

.motto__line {
  font-size: clamp(1.2rem, 4vw, 2.8rem);
  letter-spacing: 0.18em;
  font-weight: 400;
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  align-items: center;
  gap: 0.4em;
}

.motto__word { white-space: nowrap; }

.motto__sep {
  color: var(--gold);
  font-weight: 900;
  margin: 0 0.2em;
  transform: translateY(-0.05em);
}

/* ─────────── Trio of hero posters ─────────── */

.trio {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.2rem;
  padding: 2.2rem 1.6rem;
  max-width: 1400px;
  margin: 0 auto;
}

.trio__poster {
  position: relative;
  background: var(--cream);
  border: 6px solid var(--black);
  outline: 3px solid var(--paper);
  outline-offset: -10px;
  box-shadow:
    0 4px 0 var(--red-deep),
    0 16px 28px rgba(0,0,0,0.18);
  overflow: hidden;
  transition: transform 0.4s ease, border-color 0.4s ease;
}

:root[data-theme="victory"] .trio__poster {
  border-color: var(--black);
  box-shadow:
    0 4px 0 var(--gold),
    0 16px 28px rgba(0,0,0,0.22);
}

.trio__poster:hover {
  transform: translateY(-3px) rotate(-0.4deg);
}

.trio__poster img {
  width: 100%;
  filter: var(--img-filter);
  transition: filter 0.5s ease;
}

.trio__poster figcaption {
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  background: var(--black);
  color: var(--cream);
  text-align: center;
  font-family: "Russo One", sans-serif;
  font-size: clamp(1rem, 2.4vw, 1.7rem);
  padding: 0.55rem 0.5rem 0.6rem;
  letter-spacing: 0.35em;
  border-top: 4px solid var(--red);
}

:root[data-theme="victory"] .trio__poster figcaption {
  border-top: 4px solid var(--gold);
  color: var(--gold);
}

/* ─────────── Hero / "СТРОИТСЯ" ─────────── */

.hero {
  position: relative;
  background: var(--paper-dark);
  padding: 4.5rem 1rem 3.5rem;
  text-align: center;
  border-top: 4px double var(--black);
  border-bottom: 4px double var(--black);
  overflow: hidden;
}

.hero::before, .hero::after {
  content: '';
  position: absolute;
  top: 50%;
  width: 18%;
  height: 6px;
  background: var(--rule-mid);
  transform: translateY(-50%);
  box-shadow: 0 12px 0 var(--rule-side), 0 -12px 0 var(--rule-side);
}
.hero::before { left: 2%; }
.hero::after { right: 2%; }

.hero__inner {
  max-width: 1100px;
  margin: 0 auto;
  position: relative;
}

.hero__eyebrow {
  font-family: "Russo One", sans-serif;
  font-size: 0.95rem;
  letter-spacing: 0.6em;
  text-transform: uppercase;
  color: var(--red-deep);
  margin-bottom: 0.6rem;
}

.hero__title {
  font-family: "Russo One", sans-serif;
  line-height: 0.95;
  text-transform: uppercase;
}

.hero__small {
  display: block;
  font-size: clamp(1.4rem, 4.5vw, 3rem);
  letter-spacing: 0.4em;
  color: var(--ink);
}

.hero__big {
  display: block;
  font-size: clamp(3.5rem, 14vw, 9.5rem);
  letter-spacing: 0.04em;
  color: var(--red);
  text-shadow:
    4px 4px 0 var(--ochre),
    8px 8px 0 var(--black);
  margin-top: 0.4rem;
}

:root[data-theme="victory"] .hero__big {
  color: var(--red-deep);
  text-shadow:
    4px 4px 0 var(--gold),
    8px 8px 0 var(--black);
}

.hero__sub {
  margin-top: 1.6rem;
  font-size: clamp(0.9rem, 1.6vw, 1.05rem);
  letter-spacing: 0.25em;
  text-transform: uppercase;
  font-weight: 700;
  color: var(--ink);
}

.stamp {
  position: absolute;
  top: -2.5rem;
  right: 4%;
  display: inline-flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  width: 150px;
  height: 150px;
  border: 4px double var(--red-deep);
  border-radius: 50%;
  color: var(--red-deep);
  font-family: "Russo One", sans-serif;
  text-transform: uppercase;
  transform: rotate(-12deg);
  background: rgba(241,231,208,0.4);
  letter-spacing: 0.18em;
  opacity: 0.85;
  filter: blur(0.3px);
}

:root[data-theme="victory"] .stamp {
  border: 4px double var(--gold);
  color: var(--gold);
  background: rgba(20, 17, 13, 0.55);
  box-shadow: 0 0 20px rgba(0,0,0,0.18);
}

.stamp__line { font-size: 1rem; }
.stamp__date {
  font-size: 0.85rem;
  margin-top: 0.4rem;
  letter-spacing: 0.2em;
  font-family: "PT Serif", serif;
  font-style: italic;
}

:root[data-theme="victory"] .stamp__line,
:root[data-theme="victory"] .stamp__date {
  font-size: 1.6rem;
  font-family: "Russo One", sans-serif;
  font-style: normal;
  letter-spacing: 0.18em;
  margin-top: 0.2rem;
}
:root[data-theme="victory"] .stamp__date {
  border-top: 1px solid var(--gold);
  padding-top: 0.3rem;
}

@media (max-width: 720px) {
  .stamp { display: none; }
}

/* ─────────── Mosaic gallery ─────────── */

.mosaic {
  display: grid;
  grid-template-columns: repeat(6, 1fr);
  grid-auto-rows: 180px;
  gap: 1rem;
  padding: 2.5rem 1.6rem;
  max-width: 1400px;
  margin: 0 auto;
}

.m {
  position: relative;
  border: 5px solid var(--black);
  outline: 2px solid var(--paper-dark);
  outline-offset: -8px;
  background: var(--cream);
  overflow: hidden;
  grid-column: span 2;
  grid-row: span 1;
  box-shadow:
    0 3px 0 var(--red-deep),
    0 12px 18px rgba(0,0,0,0.15);
  transition: transform 0.35s ease, box-shadow 0.4s ease;
}

:root[data-theme="victory"] .m {
  box-shadow:
    0 3px 0 var(--gold),
    0 12px 18px rgba(0,0,0,0.22);
}

.m:hover { transform: translateY(-3px); }

.m img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  filter: var(--img-filter);
  transition: filter 0.5s ease;
}

.m figcaption {
  position: absolute;
  bottom: 8px;
  left: 8px;
  right: 8px;
  padding: 0.45rem 0.6rem;
  background: var(--black);
  color: var(--cream);
  font-family: "Russo One", sans-serif;
  font-size: clamp(0.7rem, 1.1vw, 0.95rem);
  letter-spacing: 0.32em;
  text-transform: uppercase;
  text-align: center;
  border-top: 3px solid var(--red);
  pointer-events: none;
  text-shadow: 0 1px 0 rgba(0,0,0,0.3);
}

:root[data-theme="victory"] .m figcaption {
  border-top: 3px solid var(--gold);
  color: var(--gold);
}

.m--wide { grid-column: span 4; }
.m--tall { grid-column: span 2; grid-row: span 2; }

@media (max-width: 1024px) {
  .mosaic { grid-template-columns: repeat(4, 1fr); grid-auto-rows: 200px; }
  .m { grid-column: span 2; }
  .m--wide { grid-column: span 4; }
  .m--tall { grid-column: span 2; grid-row: span 2; }
}

@media (max-width: 640px) {
  .mosaic { grid-template-columns: repeat(2, 1fr); grid-auto-rows: 220px; }
  .m, .m--wide, .m--tall { grid-column: span 2; grid-row: span 1; }
}

/* ─────────── Footer band ─────────── */

.band--bottom {
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: 3rem 1rem 2.5rem;
  background:
    radial-gradient(ellipse at top, rgba(190,30,45,0.18), transparent 60%),
    var(--black);
  color: var(--cream);
  border-top: 6px solid var(--red);
  text-align: center;
  position: relative;
  transition: border-color 0.4s ease;
}

:root[data-theme="victory"] .band--bottom {
  background:
    radial-gradient(ellipse at top, rgba(232, 181, 0, 0.18), transparent 60%),
    var(--black);
  border-top: 6px solid var(--gold);
}

.band--bottom::before {
  content: '';
  position: absolute;
  top: -6px;
  left: 50%;
  transform: translateX(-50%);
  width: 80px;
  height: 18px;
  background: var(--red);
  clip-path: polygon(0 0, 100% 0, 50% 100%);
}

:root[data-theme="victory"] .band--bottom::before {
  background: var(--gold);
}

.emblem {
  width: 130px;
  height: auto;
  margin-bottom: 1.2rem;
  filter: brightness(0.95) contrast(1.05);
  opacity: 0.95;
  transition: filter 0.5s ease;
}

:root[data-theme="victory"] .emblem {
  filter: brightness(0.92) contrast(1.08) sepia(0.15) saturate(1.1);
}

.footer__motto {
  font-family: "Russo One", sans-serif;
  font-size: clamp(1.4rem, 3vw, 2.2rem);
  letter-spacing: 0.22em;
  color: var(--cream);
}

.footer__line {
  margin-top: 0.6rem;
  font-family: "Russo One", sans-serif;
  letter-spacing: 0.25em;
  color: var(--red-bright);
  font-size: clamp(0.75rem, 1.4vw, 0.95rem);
  text-transform: uppercase;
}

:root[data-theme="victory"] .footer__line {
  color: var(--gold);
}

.footer__sub {
  margin-top: 1rem;
  opacity: 0.5;
  font-size: 0.78rem;
  letter-spacing: 0.4em;
  font-family: "PT Serif", serif;
  font-style: italic;
}

/* ─────────── Mobile niceties ─────────── */

@media (max-width: 768px) {
  .band--top { padding: 0.8rem 1rem; gap: 0.6rem; flex-wrap: wrap; }
  .brand { font-size: 0.95rem; }
  .date { font-size: 0.7rem; }
  .theme-switch { font-size: 0.7rem; margin-right: 0.4rem; }
  .theme-switch__btn { padding: 0.35rem 0.65rem; }
  .trio { grid-template-columns: 1fr; gap: 1.2rem; padding: 1.4rem; }
  .hero { padding: 3rem 1rem 2.5rem; }
  .hero::before, .hero::after { display: none; }
}

/* ─────────── Reduced motion ─────────── */

@media (prefers-reduced-motion: reduce) {
  * { transition: none !important; }
}
