/* ========================================================================
   ИТ-БУРЯТИЯ — AI ART CUP
   Арт-галерея + промпт-терминал: фиолетовый/магента/оранжевый,
   serif-заголовки + монотекст для «кода» конкурса
   ======================================================================== */

:root {
  --bg: #0d0710;
  --bg-soft: #140b1c;
  --fg: #f6f1f8;
  --fg-dim: #a192ab;
  --line: rgba(255,255,255,.09);

  --accent-purple: #a855f7;
  --accent-magenta: #ec4899;
  --accent-orange: #f97316;
  --accent: var(--accent-magenta);

  --grad: linear-gradient(120deg, var(--accent-purple), var(--accent-magenta) 50%, var(--accent-orange));

  --radius: 18px;
  --font-head: 'Unbounded', sans-serif;
  --font-body: 'Hanken Grotesk', system-ui, sans-serif;
  --font-mono: 'Space Mono', monospace;
}

body {
  background: var(--bg);
  color: var(--fg);
  font-family: var(--font-body);
}

.scroll-progress {
  position: fixed;
  top: 0; left: 0;
  width: 0%;
  height: 3px;
  background: var(--grad);
  z-index: 200;
  box-shadow: 0 0 10px rgba(236,72,153,.6);
  transition: width .1s linear;
}

.art-label {
  font-family: var(--font-head);
  font-weight: 700;
  font-size: clamp(1.6rem, 3vw, 2.2rem);
  margin-bottom: 10px;
}

.art-sub {
  color: var(--fg-dim);
  margin-bottom: 44px;
  max-width: 560px;
}

/* ---------------------------------- NAV ---------------------------------- */

.art-nav {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 100;
  background: rgba(13,7,16,.68);
  backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--line);
}

.art-nav__inner {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 72px;
  padding-right: 76px;
}

.art-nav__back {
  font-weight: 600;
  font-size: .9rem;
  color: var(--fg-dim);
  transition: color .2s;
}
.art-nav__back:hover { color: var(--fg); }

.art-nav__title {
  font-family: var(--font-head);
  font-weight: 700;
  font-size: .9rem;
  letter-spacing: .04em;
  color: var(--accent-orange);
  display: none;
}

@media (min-width: 640px) {
  .art-nav__title { display: inline; }
}

.art-nav__cta.artbtn--primary {
  padding: 11px 22px;
  font-size: .86rem;
}

/* ---------------------------------- BUTTONS ---------------------------------- */

.artbtn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 16px 30px;
  border-radius: 10px;
  font-family: var(--font-body);
  font-weight: 600;
  font-size: .94rem;
  position: relative;
  overflow: hidden;
  isolation: isolate;
  transition: transform .2s, box-shadow .2s;
}

.artbtn::before {
  content: '';
  position: absolute;
  top: 0;
  left: -60%;
  width: 40%;
  height: 100%;
  background: linear-gradient(120deg, transparent, rgba(168,85,247,.4) 40%, rgba(255,255,255,.65) 50%, rgba(249,115,22,.4) 60%, transparent);
  transform: skewX(-20deg);
  transition: left .55s ease;
}

.artbtn:hover::before {
  left: 130%;
}

.artbtn--primary {
  background: var(--grad);
  color: #0d0710;
  box-shadow: 0 0 0 1px rgba(255,255,255,.1), 0 10px 30px -8px rgba(236,72,153,.5);
  animation: artBtnPulse 2.6s ease-in-out infinite;
}

@keyframes artBtnPulse {
  0%, 100% { box-shadow: 0 0 0 1px rgba(255,255,255,.1), 0 10px 30px -8px rgba(236,72,153,.5); }
  50% { box-shadow: 0 0 0 1px rgba(255,255,255,.16), 0 10px 36px -6px rgba(249,115,22,.5); }
}

.artbtn--primary:hover {
  transform: translateY(-3px);
  box-shadow: 0 0 0 1px rgba(255,255,255,.2), 0 16px 40px -8px rgba(236,72,153,.65);
  animation-play-state: paused;
}

.artbtn--primary:disabled {
  opacity: .4;
  cursor: not-allowed;
  pointer-events: none;
  animation: none;
  transform: none;
  box-shadow: none;
}

.artbtn--primary:disabled::before {
  display: none;
}

.artbtn--ghost {
  border: 1px solid var(--line);
  color: var(--fg);
  background: rgba(255,255,255,.03);
}

.artbtn--ghost:hover {
  border-color: var(--accent-magenta);
  color: var(--accent-magenta);
  transform: translateY(-2px);
}

/* ---------------------------------- HERO ---------------------------------- */

.art-hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  padding-top: 72px;
  overflow: hidden;
  background-image: radial-gradient(circle, rgba(236,72,153,.17) 1px, transparent 1.5px);
  background-size: 28px 28px;
  background-position: right 9% top 14%;
}

.art-hero::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(90deg, var(--bg) 36%, transparent 100%);
  pointer-events: none;
}

.art-hero__glow {
  position: absolute;
  width: 560px;
  height: 560px;
  border-radius: 50%;
  filter: blur(60px);
  opacity: .35;
  pointer-events: none;
}

.art-hero__glow--1 {
  background: var(--accent-purple);
  top: -140px;
  left: -140px;
}

.art-hero__glow--2 {
  background: var(--accent-orange);
  bottom: -160px;
  right: -120px;
}

.art-hero__inner {
  position: relative;
  z-index: 2;
  padding: 40px 0 60px;
}

.art-eyebrow {
  font-size: .85rem;
  letter-spacing: .1em;
  text-transform: uppercase;
  color: var(--accent-orange);
  margin-bottom: 20px;
}

.art-hero__title {
  position: relative;
  display: inline-block;
  font-family: var(--font-head);
  font-weight: 900;
  text-transform: uppercase;
  font-size: clamp(2.8rem, 8vw, 5.2rem);
  line-height: 1.02;
  letter-spacing: -.01em;
  margin-bottom: 24px;
  color: var(--fg);
}

.art-hero__title::before,
.art-hero__title::after {
  content: attr(data-text);
  position: absolute;
  inset: 0;
  mix-blend-mode: screen;
  pointer-events: none;
}

.art-hero__title::before {
  color: var(--accent-magenta);
  animation: artChromaA 3.6s ease-in-out infinite;
}

.art-hero__title::after {
  color: var(--accent-orange);
  animation: artChromaB 3.6s ease-in-out infinite;
}

@keyframes artChromaA {
  0%, 100% { transform: translate(0, 0); }
  25% { transform: translate(-6px, 2px); }
  50% { transform: translate(3px, -3px); }
  75% { transform: translate(-3px, 1px); }
}

@keyframes artChromaB {
  0%, 100% { transform: translate(0, 0); }
  25% { transform: translate(6px, -2px); }
  50% { transform: translate(-3px, 3px); }
  75% { transform: translate(3px, -1px); }
}

.art-hero__subtitle {
  max-width: 600px;
  font-size: 1.1rem;
  color: var(--fg-dim);
  margin-bottom: 20px;
}

.art-hero__meta {
  font-family: var(--font-mono);
  font-size: .88rem;
  color: var(--fg-dim);
  margin-bottom: 36px;
  padding-left: 15px;
  border-left: 2px solid var(--accent-orange);
}

.art-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  margin-bottom: 44px;
}

/* ---------------------------------- PROCESS / TERMINAL ---------------------------------- */

.art-process {
  padding: 120px 0;
  background: var(--bg-soft);
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.terminal {
  max-width: 640px;
  border-radius: 14px;
  border: 1px solid var(--line);
  background: #0a050d;
  box-shadow: 0 30px 60px -24px rgba(0,0,0,.6);
  overflow: hidden;
}

.terminal__bar {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 12px 16px;
  background: rgba(255,255,255,.03);
  border-bottom: 1px solid var(--line);
}

.terminal__dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--fg-dim);
  opacity: .5;
}

.terminal__dot:nth-child(1) { background: var(--accent-orange); opacity: .8; }
.terminal__dot:nth-child(2) { background: var(--accent-magenta); opacity: .8; }
.terminal__dot:nth-child(3) { background: var(--accent-purple); opacity: .8; }

.terminal__title {
  margin-left: 10px;
  font-family: var(--font-mono);
  font-size: .76rem;
  color: var(--fg-dim);
}

.terminal__body {
  padding: 24px 22px;
  font-family: var(--font-mono);
  font-size: .9rem;
  line-height: 2.1;
}

.terminal__prompt {
  color: var(--accent-magenta);
  margin-right: 10px;
}

.terminal__arrow {
  color: var(--accent-orange);
  margin: 0 6px;
}

.terminal__cursor-line {
  margin-top: 6px;
}

.terminal__cursor {
  display: inline-block;
  width: 8px;
  height: 1rem;
  background: var(--accent-magenta);
  vertical-align: middle;
  animation: artCursorBlink 1s step-end infinite;
}

@keyframes artCursorBlink {
  0%, 50% { opacity: 1; }
  50.01%, 100% { opacity: 0; }
}

/* ---------------------------------- THEMES GALLERY ---------------------------------- */

.art-gallery {
  padding: 120px 0;
}

.frames {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 22px;
}

.frame {
  display: flex;
  flex-direction: column;
  padding: 10px 10px 16px;
  border-radius: 12px;
  border: 1px solid var(--line);
  background: rgba(255,255,255,.02);
  transition: border-color .25s, transform .2s, box-shadow .25s;
}

.frame:hover {
  transform: translateY(-4px);
  border-color: rgba(236,72,153,.45);
  box-shadow: 0 14px 34px -24px rgba(236,72,153,.7);
}

.frame__art {
  height: 140px;
  border-radius: 8px;
  margin-bottom: 14px;
  background-size: 200% 200%;
  animation: artFrameShift 9s ease-in-out infinite;
}

@keyframes artFrameShift {
  0%, 100% { background-position: 0% 50%; }
  50% { background-position: 100% 50%; }
}

.frame__art--1 { background-image: linear-gradient(135deg, #a855f7, #ec4899, #f97316); }
.frame__art--2 { background-image: linear-gradient(135deg, #4ad7ff, #a855f7, #ec4899); }
.frame__art--3 { background-image: linear-gradient(135deg, #f97316, #ec4899, #a855f7); }
.frame__art--4 { background-image: linear-gradient(135deg, #22c55e, #a855f7, #4ad7ff); }
.frame__art--5 { background-image: linear-gradient(135deg, #ec4899, #f97316, #a855f7); }
.frame__art--6 { background-image: linear-gradient(135deg, #a855f7, #4ad7ff, #ec4899); }

.frame__label {
  padding: 0 6px;
  font-family: var(--font-head);
  font-weight: 700;
  font-size: .8rem;
  text-transform: uppercase;
  letter-spacing: .02em;
  text-align: center;
}

/* ---------------------------------- CRITERIA ---------------------------------- */

.art-criteria {
  padding: 120px 0;
  background: var(--bg-soft);
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.crit-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 20px;
}

.crit-card {
  padding: 28px;
  border-radius: var(--radius);
  border: 1px solid var(--line);
  background: rgba(255,255,255,.025);
  transition: border-color .25s, transform .2s;
}

.crit-card:hover {
  transform: translateY(-4px);
  border-color: rgba(255,255,255,.25);
}

.crit-card__icon {
  font-size: 2rem;
  display: inline-block;
  margin-bottom: 14px;
}

.crit-card h3 {
  font-family: var(--font-head);
  font-size: 1.05rem;
  font-weight: 700;
  margin-bottom: 8px;
}

.crit-card p {
  color: var(--fg-dim);
  font-size: .92rem;
}

/* ---------------------------------- FAQ ---------------------------------- */

.art-faq {
  padding: 120px 0;
}

.faq-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 20px;
}

.faq-card {
  padding: 26px;
  border-radius: var(--radius);
  border: 1px solid var(--line);
  background: rgba(255,255,255,.025);
}

.faq-card h3 {
  font-family: var(--font-head);
  font-size: 1rem;
  font-weight: 700;
  margin-bottom: 10px;
}

.faq-card p {
  color: var(--fg-dim);
  font-size: .92rem;
}

/* ---------------------------------- REGISTER ---------------------------------- */

.art-register {
  padding: 120px 0 100px;
  text-align: center;
}

.art-register .art-label,
.art-register .art-sub {
  margin-left: auto;
  margin-right: auto;
}

/* ---------------------------------- FOOTER ---------------------------------- */

.art-footer {
  padding: 36px 0;
  border-top: 1px solid var(--line);
  text-align: center;
}

.art-footer__inner {
  display: flex;
  flex-direction: column;
  gap: 8px;
  align-items: center;
}

.art-footer__back {
  color: var(--fg-dim);
  font-size: .9rem;
  transition: color .2s;
}
.art-footer__back:hover { color: var(--fg); }

.art-footer p {
  color: var(--fg-dim);
  font-size: .78rem;
}

.art-footer__org {
  margin-top: 24px;
  padding-top: 24px;
  border-top: 1px solid var(--line);
  color: var(--fg-dim);
  font-size: .78rem;
  line-height: 1.7;
  max-width: 820px;
  margin-left: auto;
  margin-right: auto;
}

.art-footer__org a {
  color: var(--accent-magenta);
  text-decoration: underline;
  text-decoration-color: rgba(236,72,153,.4);
  transition: color .2s;
}

.art-footer__org a:hover {
  color: var(--fg);
}

@media (max-width: 640px) {
  .art-hero__title { font-size: clamp(2.4rem, 12vw, 3.6rem); }
}