/* ============================================================
   cases.technorazum.ru — page-specific styles
   Mobile-first, GPU-friendly transforms, reuses _shared + main
   ============================================================ */

.hero-cta {
  display: flex;
  gap: 1rem;
  margin-top: 2rem;
  flex-wrap: wrap;
  justify-content: center;
}

.btn-primary,
.btn-ghost {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.85rem 1.6rem;
  border-radius: 9999px;
  font-weight: 600;
  font-size: 1rem;
  letter-spacing: 0.01em;
  cursor: pointer;
  font-family: inherit;
  border: 1px solid transparent;
  transition: transform 0.2s ease, box-shadow 0.2s ease, background 0.2s ease, color 0.2s ease, border-color 0.2s ease;
  will-change: transform;
  text-decoration: none;
}
.btn-primary {
  background: linear-gradient(135deg, #8B5CF6 0%, #3B82F6 50%, #06B6D4 100%);
  color: #fff;
  box-shadow: 0 8px 24px rgba(139, 92, 246, 0.35);
}
.btn-primary:hover, .btn-primary:focus-visible {
  transform: translateY(-2px) scale(1.02);
  box-shadow: 0 12px 32px rgba(139, 92, 246, 0.5);
  outline: none;
}
.btn-ghost {
  background: transparent;
  color: var(--tz-text);
  border-color: rgba(255, 255, 255, 0.2);
}
.btn-ghost:hover, .btn-ghost:focus-visible {
  border-color: var(--tz-accent);
  color: var(--tz-accent-3);
  transform: translateY(-2px);
  outline: none;
}

.section {
  padding: 5rem 1.5rem;
  background: var(--tz-bg-dark);
  position: relative;
}
.section--alt { background: var(--tz-bg-deep); }
.container { max-width: 1200px; margin: 0 auto; }
.section-eyebrow {
  font-size: 0.8rem;
  letter-spacing: 0.25em;
  text-transform: uppercase;
  color: var(--tz-accent-3);
  margin-bottom: 0.75rem;
  font-weight: 600;
}
.section-title {
  font-size: clamp(1.75rem, 3vw + 1rem, 3rem);
  line-height: 1.15;
  font-weight: 800;
  color: var(--tz-text);
  max-width: 800px;
  margin-bottom: 1.25rem;
  letter-spacing: -0.02em;
}
.section-lead {
  font-size: 1.05rem;
  line-height: 1.6;
  color: var(--tz-text-muted);
  max-width: 720px;
  margin-bottom: 2.5rem;
}

/* ---------- "What is" pillars ---------- */
.case-pillars {
  display: grid;
  gap: 0.75rem;
  grid-template-columns: 1fr;
  margin-bottom: 3rem;
}
.case-pillars li {
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid rgba(139, 92, 246, 0.15);
  border-radius: 12px;
  padding: 1rem 1.25rem;
  color: var(--tz-text-muted);
  font-size: 0.97rem;
  line-height: 1.5;
  transition: transform 0.25s ease, border-color 0.25s ease;
}
.case-pillars li:hover { transform: translateX(6px); border-color: var(--tz-accent); }
.case-pillars strong { color: var(--tz-text); }
@media (min-width: 768px) {
  .case-pillars { grid-template-columns: 1fr 1fr; }
}

.why-grid {
  display: grid;
  gap: 1.25rem;
  grid-template-columns: 1fr;
}
@media (min-width: 600px) { .why-grid { grid-template-columns: 1fr 1fr; } }
@media (min-width: 1024px) { .why-grid { grid-template-columns: repeat(4, 1fr); } }

/* ---------- TIMELINE (5 steps) ---------- */
.case-timeline {
  position: relative;
  list-style: none;
  margin: 2.5rem 0 3rem;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}
.case-timeline::before {
  content: "";
  position: absolute;
  left: 19px;
  top: 0;
  bottom: 0;
  width: 2px;
  background: linear-gradient(180deg, rgba(139, 92, 246, 0.4), rgba(6, 182, 212, 0.4));
  border-radius: 2px;
}
.tl-item {
  position: relative;
  display: flex;
  gap: 1.25rem;
  align-items: flex-start;
  padding-left: 0;
  transition: transform 0.3s ease;
  will-change: transform;
}
.tl-item:hover { transform: translateX(6px); }
.tl-dot {
  flex: 0 0 40px;
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.05);
  border: 2px solid rgba(139, 92, 246, 0.4);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  color: var(--tz-text-muted);
  font-size: 0.95rem;
  position: relative;
  z-index: 1;
  transition: background 0.3s ease, color 0.3s ease, border-color 0.3s ease, box-shadow 0.3s ease, transform 0.3s ease;
}
.tl-item.is-active .tl-dot,
.tl-item:hover .tl-dot {
  background: linear-gradient(135deg, #8B5CF6, #3B82F6);
  color: #fff;
  border-color: transparent;
  box-shadow: 0 0 0 4px rgba(139, 92, 246, 0.2);
  transform: scale(1.05);
}
.tl-content {
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: 14px;
  padding: 1rem 1.25rem;
  flex: 1;
  transition: border-color 0.3s ease, background 0.3s ease;
}
.tl-item.is-active .tl-content,
.tl-item:hover .tl-content {
  border-color: var(--tz-accent);
  background: rgba(139, 92, 246, 0.08);
}
.tl-title {
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--tz-text);
  margin-bottom: 0.25rem;
}
.tl-content p {
  font-size: 0.95rem;
  line-height: 1.5;
  color: var(--tz-text-muted);
}

/* Horizontal timeline on desktop */
@media (min-width: 1024px) {
  .case-timeline {
    flex-direction: row;
    justify-content: space-between;
    align-items: flex-start;
    gap: 0;
    margin: 3rem 0 4rem;
  }
  .case-timeline::before {
    left: 4%;
    right: 4%;
    top: 19px;
    bottom: auto;
    width: auto;
    height: 2px;
    background: linear-gradient(90deg, rgba(139, 92, 246, 0.4), rgba(6, 182, 212, 0.4));
  }
  .tl-item {
    flex: 1;
    flex-direction: column;
    align-items: center;
    text-align: center;
    padding: 0 0.5rem;
  }
  .tl-content { margin-top: 0.75rem; }
}

/* ---------- Leagues ---------- */
.leagues { margin-top: 3rem; }
.leagues-title {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--tz-text);
  margin-bottom: 1.25rem;
}
.leagues-grid {
  display: grid;
  gap: 1rem;
  grid-template-columns: 1fr;
}
@media (min-width: 768px) {
  .leagues-grid { grid-template-columns: repeat(3, 1fr); }
}
.league-card {
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: 14px;
  padding: 1.5rem;
  transition: transform 0.3s ease, border-color 0.3s ease;
  will-change: transform;
}
.league-card:hover { transform: translateY(-4px); border-color: var(--tz-accent); }
.league-tag {
  display: inline-block;
  background: linear-gradient(135deg, rgba(139, 92, 246, 0.3), rgba(59, 130, 246, 0.3));
  color: #fff;
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  padding: 0.3rem 0.7rem;
  border-radius: 9999px;
  margin-bottom: 0.75rem;
}
.league-card p {
  font-size: 0.95rem;
  line-height: 1.5;
  color: var(--tz-text-muted);
}

/* ---------- Partners ---------- */
.partners-grid {
  display: grid;
  gap: 1.25rem;
  grid-template-columns: 1fr;
}
@media (min-width: 768px) {
  .partners-grid { grid-template-columns: repeat(3, 1fr); }
}
.partner-card {
  background: linear-gradient(180deg, rgba(139, 92, 246, 0.06), rgba(6, 182, 212, 0.04));
  border: 1px solid rgba(139, 92, 246, 0.2);
  border-radius: 20px;
  padding: 2rem 1.75rem;
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  transition: transform 0.3s ease, border-color 0.3s ease, box-shadow 0.3s ease;
  will-change: transform;
}
.partner-card:hover {
  transform: translateY(-6px);
  border-color: var(--tz-accent);
  box-shadow: 0 20px 40px rgba(139, 92, 246, 0.2);
}
.partner-logo {
  font-size: 1.75rem;
  font-weight: 800;
  letter-spacing: 0.05em;
  background: linear-gradient(135deg, #8B5CF6, #06B6D4);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}
.partner-name {
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--tz-text);
}
.partner-card p {
  font-size: 0.95rem;
  line-height: 1.5;
  color: var(--tz-text-muted);
}

/* ---------- Schedule / Seasons ---------- */
.seasons {
  display: grid;
  gap: 1.5rem;
  grid-template-columns: 1fr;
}
@media (min-width: 768px) {
  .seasons { grid-template-columns: 1fr 1fr; }
}
.season-card {
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: 18px;
  padding: 1.75rem;
  transition: transform 0.3s ease, border-color 0.3s ease;
  will-change: transform;
}
.season-card:hover { transform: translateY(-4px); border-color: var(--tz-accent); }
.season-title {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--tz-text);
  margin-bottom: 1rem;
  background: linear-gradient(135deg, #8B5CF6, #06B6D4);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}
.season-list { display: flex; flex-direction: column; gap: 0.5rem; }
.season-list li {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: 1rem;
  padding: 0.5rem 0;
  border-bottom: 1px dashed rgba(255, 255, 255, 0.08);
  font-size: 0.95rem;
  color: var(--tz-text-muted);
}
.season-list li:last-child { border-bottom: none; }
.season-list strong { color: var(--tz-text); text-align: right; font-weight: 600; }
.seasons-foot { text-align: center; margin-top: 2.5rem; }

/* ---------- Prizes ---------- */
.prize-amount {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 2.5rem 1.5rem;
  margin-bottom: 2.5rem;
  text-align: center;
  border-radius: 24px;
}
.prize-label {
  font-size: 0.85rem;
  letter-spacing: 0.25em;
  text-transform: uppercase;
  color: var(--tz-accent-3);
  margin-bottom: 0.5rem;
}
.prize-num {
  font-size: clamp(2.5rem, 6vw, 5rem);
  font-weight: 800;
  background: linear-gradient(135deg, #8B5CF6, #06B6D4);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  line-height: 1;
  letter-spacing: -0.02em;
}
.prize-foot {
  margin-top: 0.5rem;
  font-size: 0.95rem;
  color: var(--tz-text-muted);
}
.prizes-grid {
  display: grid;
  gap: 1.25rem;
  grid-template-columns: 1fr;
}
@media (min-width: 600px) { .prizes-grid { grid-template-columns: 1fr 1fr; } }
@media (min-width: 1024px) { .prizes-grid { grid-template-columns: repeat(3, 1fr); } }
.prize-card {
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: 14px;
  padding: 1.5rem;
  transition: transform 0.3s ease, border-color 0.3s ease;
  will-change: transform;
}
.prize-card:hover { transform: translateY(-4px); border-color: var(--tz-accent); }
.prize-card h3 {
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--tz-text);
  margin-bottom: 0.5rem;
}
.prize-card p {
  font-size: 0.95rem;
  line-height: 1.5;
  color: var(--tz-text-muted);
}

/* ---------- Past case grid ---------- */
.case-grid {
  display: grid;
  gap: 1.5rem;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
}
.case-card {
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: 18px;
  padding: 1.75rem;
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  transition: transform 0.3s ease, border-color 0.3s ease, box-shadow 0.3s ease;
  will-change: transform;
}
.case-card:hover {
  transform: translateY(-6px);
  border-color: var(--tz-accent);
  box-shadow: 0 20px 40px rgba(0, 0, 0, 0.35);
}
.case-tag {
  display: inline-block;
  font-size: 0.75rem;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--tz-accent-3);
  font-weight: 600;
}
.case-title {
  font-size: 1.2rem;
  font-weight: 700;
  color: var(--tz-text);
}
.case-card p {
  font-size: 0.95rem;
  line-height: 1.55;
  color: var(--tz-text-muted);
}
.case-card strong { color: var(--tz-text); }

/* ---------- Registration form ---------- */
.reg-form {
  background: rgba(15, 15, 23, 0.65);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border: 1px solid rgba(139, 92, 246, 0.2);
  border-radius: 20px;
  padding: 2rem;
  max-width: 760px;
  margin: 0 auto;
}
.reg-grid {
  display: grid;
  gap: 1rem;
  grid-template-columns: 1fr;
}
@media (min-width: 600px) { .reg-grid { grid-template-columns: 1fr 1fr; } }
.field { display: flex; flex-direction: column; gap: 0.35rem; }
.field--full { grid-column: 1 / -1; }
.field span {
  font-size: 0.8rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--tz-text-muted);
}
.field input,
.field select,
.field textarea {
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: 10px;
  padding: 0.7rem 0.9rem;
  color: var(--tz-text);
  font-family: inherit;
  font-size: 1rem;
  transition: border-color 0.2s ease, background 0.2s ease;
  width: 100%;
  resize: vertical;
}
.field select { appearance: none; cursor: pointer; }
.field input:focus,
.field select:focus,
.field textarea:focus {
  outline: none;
  border-color: var(--tz-accent);
  background: rgba(139, 92, 246, 0.08);
}
.field input:invalid:not(:placeholder-shown),
.field select:invalid:not(:focus) {
  border-color: rgba(239, 68, 68, 0.5);
}
.checkbox {
  grid-column: 1 / -1;
  display: flex;
  align-items: flex-start;
  gap: 0.6rem;
  font-size: 0.9rem;
  color: var(--tz-text-muted);
  line-height: 1.4;
}
.checkbox input { width: 18px; height: 18px; flex: 0 0 18px; accent-color: var(--tz-accent); margin-top: 2px; }
.checkbox a { color: var(--tz-accent-3); }

.form-actions {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 1rem;
  margin-top: 1.5rem;
}
.form-status {
  font-size: 0.9rem;
  margin: 0;
  min-height: 1.2em;
}
.form-status.is-ok { color: #22c55e; }
.form-status.is-err { color: #f87171; }

/* ---------- Reveal animation ---------- */
[data-reveal] {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.6s ease, transform 0.6s cubic-bezier(0.4, 0, 0.2, 1);
  will-change: transform, opacity;
}
[data-reveal].is-visible {
  opacity: 1;
  transform: translateY(0);
}

@media (prefers-reduced-motion: reduce) {
  [data-reveal],
  .case-card,
  .partner-card,
  .season-card,
  .prize-card,
  .league-card,
  .tl-item,
  .btn-primary,
  .btn-ghost {
    transition: none;
  }
}

@media (min-width: 768px) {
  .section { padding: 6rem 2rem; }
}