/* ========================================================================
   ИТ-БУРЯТИЯ — CTF OLYMPIAD
   Тема «терминал слежения»: сканлайны, циан/красный/матрикс-зелёный,
   грифы секретности вместо таймлайна/таблицы, лог вместо аккордеона
   ======================================================================== */

:root {
  --bg: #080e17;
  --bg-soft: #0d1823;
  --fg: #e8edf0;
  --fg-dim: #a2b3bf;
  --line: rgba(152,207,221,.13);

  --accent-cyan: #00e5ff;
  --accent-red: #ff647d;
  --accent-green: #67eec5;
  --accent: var(--accent-cyan);

  --grad: linear-gradient(115deg, #48ddec, var(--accent-green) 65%, #b8f2e5);

  --radius: 14px;
  --font-head: 'Share Tech Mono', monospace;
  --font-body: 'Archivo', system-ui, sans-serif;
}

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(0,229,255,.5);
  transition: width .1s linear;
}

.sec-label {
  font-family: var(--font-head);
  font-size: clamp(1.4rem, 2.6vw, 1.9rem);
  margin-bottom: 10px;
}

.sec-sub {
  color: var(--fg-dim);
  margin-bottom: 44px;
  max-width: 580px;
}

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

.sec-nav {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 100;
  background: rgba(5,7,9,.72);
  backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--line);
}

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

.sec-nav__back {
  font-weight: 500;
  font-size: .9rem;
  color: var(--fg-dim);
  transition: color .2s;
}
.sec-nav__back:hover { color: var(--fg); }

.sec-nav__title {
  font-family: var(--font-head);
  font-size: .82rem;
  letter-spacing: .04em;
  color: var(--accent-cyan);
  display: none;
}

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

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

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

.secbtn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 16px 30px;
  border-radius: 8px;
  font-family: var(--font-body);
  font-weight: 600;
  font-size: .94rem;
  position: relative;
  overflow: hidden;
  isolation: isolate;
  transition: transform .2s, box-shadow .2s;
}

.secbtn::before {
  content: '';
  position: absolute;
  top: 0;
  left: -60%;
  width: 40%;
  height: 100%;
  background: linear-gradient(120deg, transparent, rgba(0,229,255,.4) 40%, rgba(255,255,255,.6) 50%, rgba(255,59,92,.4) 60%, transparent);
  transform: skewX(-20deg);
  transition: left .55s ease;
}

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

.secbtn--primary {
  background: var(--grad);
  color: #050709;
  box-shadow: 0 0 0 1px rgba(255,255,255,.1), 0 10px 28px -10px rgba(0,229,255,.45);
  animation: secBtnPulse 2.6s ease-in-out infinite;
}

@keyframes secBtnPulse {
  0%, 100% { box-shadow: 0 0 0 1px rgba(255,255,255,.1), 0 10px 28px -10px rgba(0,229,255,.45); }
  50% { box-shadow: 0 0 0 1px rgba(255,255,255,.16), 0 10px 32px -8px rgba(255,59,92,.45); }
}

.secbtn--primary:hover {
  transform: translateY(-3px);
  box-shadow: 0 0 0 1px rgba(255,255,255,.2), 0 16px 36px -10px rgba(0,229,255,.6);
  animation-play-state: paused;
}

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

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

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

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

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

.sec-hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  padding-top: 72px;
  overflow: hidden;
  background: radial-gradient(circle at 78% 42%, rgba(0,229,255,.13), transparent 38%),
              radial-gradient(circle at 13% 72%, rgba(75,94,181,.14), transparent 43%),
              linear-gradient(125deg, #080e17, #0a1720 66%, #091e22);
}

.sec-hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background-image: linear-gradient(rgba(78,205,223,.08) 1px, transparent 1px),
                    linear-gradient(90deg, rgba(78,205,223,.08) 1px, transparent 1px);
  background-size: 48px 48px;
  mask-image: linear-gradient(90deg, transparent 25%, #000 100%);
  pointer-events: none;
}

.sec-hero__scanlines {
  position: absolute;
  inset: 0;
  background-image: repeating-linear-gradient(
    to bottom,
    rgba(255,255,255,.025) 0px,
    rgba(255,255,255,.025) 1px,
    transparent 1px,
    transparent 3px
  );
  pointer-events: none;
}

.sec-hero__sweep {
  position: absolute;
  left: 0;
  right: 0;
  height: 140px;
  background: linear-gradient(to bottom, transparent, rgba(0,229,255,.06), transparent);
  animation: secSweep 6s linear infinite;
  pointer-events: none;
}

@keyframes secSweep {
  0% { top: -140px; }
  100% { top: 100%; }
}

.sec-hero__inner {
  position: relative;
  z-index: 2;
  padding: 40px 24px 60px;
}

.sec-eyebrow {
  font-family: var(--font-head);
  font-size: .82rem;
  letter-spacing: .02em;
  color: var(--accent-red);
  margin-bottom: 20px;
}

.sec-eyebrow::before {
  content: '> ';
  color: var(--fg-dim);
}

.sec-hero__title {
  font-family: var(--font-head);
  font-weight: 400;
  font-size: clamp(2.4rem, 7.4vw, 4.8rem);
  line-height: 1.1;
  margin-bottom: 24px;
  color: var(--fg);
  text-shadow: 0 0 18px rgba(0,229,255,.35);
}

.sec-cursor {
  display: inline-block;
  width: .5em;
  height: .8em;
  margin-left: .1em;
  background: var(--accent-cyan);
  vertical-align: middle;
  animation: secCaret 1s step-end infinite;
}

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

.sec-hero__subtitle {
  max-width: 600px;
  font-size: 1.08rem;
  color: var(--fg-dim);
  margin-bottom: 20px;
}

.sec-hero__meta {
  font-family: var(--font-head);
  font-size: .86rem;
  color: var(--fg-dim);
  margin-bottom: 36px;
}

.sec-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
}

/* ---------------------------------- CLEARANCE STEPPER ---------------------------------- */

.sec-clearance {
  padding: 120px 0;
  background: radial-gradient(circle at 100% 0, rgba(0,229,255,.055), transparent 40%), var(--bg-soft);
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.clearance-list {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.clearance {
  display: flex;
  align-items: center;
  gap: 20px;
  padding: 20px 24px;
  border-radius: var(--radius);
  border: 1px solid var(--line);
  background: rgba(255,255,255,.02);
  transition: border-color .25s, transform .2s;
}

.clearance:hover {
  transform: translateX(4px);
  border-color: rgba(255,255,255,.2);
}

.clearance__badge {
  flex-shrink: 0;
  width: 140px;
  text-align: center;
  padding: 8px 10px;
  border-radius: 6px;
  font-family: var(--font-head);
  font-size: .68rem;
  letter-spacing: .04em;
}

.clearance__badge--u { background: rgba(255,255,255,.07); color: var(--fg-dim); }
.clearance__badge--c { background: rgba(0,229,255,.12); color: var(--accent-cyan); border: 1px solid rgba(0,229,255,.3); }
.clearance__badge--s { background: rgba(255,59,92,.12); color: var(--accent-red); border: 1px solid rgba(255,59,92,.3); }
.clearance__badge--ts {
  background: var(--grad);
  color: #050709;
  font-weight: 700;
}

.clearance__body h3 {
  font-family: var(--font-head);
  font-size: 1.02rem;
  margin-bottom: 4px;
}

.clearance__body p {
  color: var(--fg-dim);
  font-size: .88rem;
}

@media (max-width: 640px) {
  .clearance { flex-direction: column; align-items: flex-start; gap: 12px; }
  .clearance__badge { width: auto; }
}

/* ---------------------------------- CATEGORIES ---------------------------------- */

.sec-categories {
  padding: 120px 0;
}

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

.cat-card {
  padding: 26px;
  border-radius: var(--radius);
  border: 1px solid var(--line);
  background: rgba(255,255,255,.025);
  transition: border-color .25s, transform .2s;
}

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

.cat-card__icon {
  font-size: 1.9rem;
  display: inline-block;
  margin-bottom: 14px;
}

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

.cat-card p {
  color: var(--fg-dim);
  font-size: .9rem;
}

/* ---------------------------------- SCORING ---------------------------------- */

.sec-scoring {
  padding: 120px 0;
  background: radial-gradient(circle at 0 100%, rgba(103,238,197,.06), transparent 42%), var(--bg-soft);
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

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

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

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

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

.score-card h3 {
  font-family: var(--font-head);
  font-size: .98rem;
  margin-bottom: 8px;
}

.score-card p {
  color: var(--fg-dim);
  font-size: .9rem;
}

/* ---------------------------------- FAQ (TERMINAL LOG) ---------------------------------- */

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

.log {
  max-width: 760px;
  padding: 28px 30px;
  border-radius: var(--radius);
  border: 1px solid var(--line);
  background: #030405;
}

.log__line {
  font-family: var(--font-head);
  font-size: .9rem;
  line-height: 1.9;
}

.log__line--q {
  color: var(--fg);
  margin-top: 18px;
}

.log__line--q:first-child {
  margin-top: 0;
}

.log__line--a {
  color: var(--fg-dim);
  margin-bottom: 4px;
}

.log__tag {
  color: var(--accent-red);
  margin-right: 8px;
}

.log__tag--a {
  color: var(--accent-cyan);
}

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

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

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

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

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

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

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

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

.sec-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;
}

.sec-footer__org a {
  color: var(--accent-cyan);
  text-decoration: underline;
  text-decoration-color: rgba(0,229,255,.4);
  transition: color .2s;
}

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

/* Длинный русский заголовок переносится без обрезки. */
.sec-hero__title{font-family:var(--font-body);font-weight:800;font-size:clamp(2rem,5.7vw,4.5rem);letter-spacing:-.045em;overflow-wrap:anywhere}.sec-nav__title{font-family:var(--font-body);font-weight:800}

@media(max-width:640px){.sec-hero__title{font-size:clamp(1.55rem,6.7vw,2.1rem);letter-spacing:-.06em}}