/* ══════════════════════════════════════════
   ВГТ · Каналы связи — channels.css
   prefix: .ch-
   ══════════════════════════════════════════ */

/* ── Hero ── */
.ch-hero {
  background: linear-gradient(135deg, #020b1a 0%, #041628 45%, #071e38 100%);
  padding: var(--space-20) 0 var(--space-24);
  position: relative;
  overflow: hidden;
}
.ch-hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background:
    radial-gradient(ellipse 55% 65% at 70% 40%, rgba(10,108,255,0.14) 0%, transparent 60%),
    radial-gradient(ellipse 35% 45% at 10% 70%, rgba(99,102,241,0.08) 0%, transparent 55%);
  z-index: 1;
}
.ch-hero__grid {
  display: grid;
  grid-template-columns: 1fr;
  max-width: 720px;
  position: relative; z-index: 2;
}
.ch-hero__eyebrow {
  display: inline-flex; align-items: center; gap: 8px;
  background: rgba(99,102,241,0.12); border: 1px solid rgba(99,102,241,0.3);
  color: #a5b4fc; font-size: var(--font-size-sm); font-weight: 600;
  letter-spacing: 0.05em; text-transform: uppercase;
  padding: 6px 14px; border-radius: var(--radius-full);
  margin-bottom: var(--space-5);
}
.ch-hero__title {
  font-size: clamp(2rem, 4.5vw, 3.2rem);
  font-weight: var(--font-weight-bold);
  color: var(--color-white); line-height: 1.12;
  margin-bottom: var(--space-5);
}
.ch-hero__title span {
  background: linear-gradient(135deg, #818cf8, #60a5fa);
  -webkit-background-clip: text; -webkit-text-fill-color: transparent;
}
.ch-hero__desc {
  font-size: var(--font-size-lg); color: rgba(255,255,255,0.7);
  line-height: 1.7; margin-bottom: var(--space-8); max-width: 600px;
}
.ch-hero__actions { display: flex; gap: var(--space-3); flex-wrap: wrap; margin-bottom: var(--space-10); }
.ch-hero__actions .btn--primary {
  background: linear-gradient(135deg, #6366f1, #4f46e5);
  border-color: transparent;
  box-shadow: 0 8px 24px rgba(99,102,241,0.35);
}
.ch-hero__actions .btn--primary:hover {
  background: linear-gradient(135deg, #818cf8, #6366f1);
  box-shadow: 0 12px 32px rgba(99,102,241,0.45);
}
@media (max-width: 640px) { .ch-hero__stats { grid-template-columns: repeat(2, 1fr); } }

/* Hero visual — topology diagram */
.ch-hero__visual {
  display: flex; align-items: center; justify-content: center;
}
.ch-topo {
  background: rgba(255,255,255,0.04);
  border: 1px solid rgba(255,255,255,0.08);
  border-radius: var(--radius-2xl);
  padding: var(--space-6);
  width: 100%; max-width: 380px;
}
.ch-topo__title {
  font-size: var(--font-size-xs); text-transform: uppercase; letter-spacing: 0.1em;
  color: rgba(255,255,255,0.4); font-weight: 600; margin-bottom: var(--space-5);
  text-align: center;
}
.ch-topo__nodes {
  display: flex; flex-direction: column; gap: var(--space-3);
}
.ch-topo-node {
  display: flex; align-items: center; gap: var(--space-3);
  padding: var(--space-3) var(--space-4);
  background: rgba(255,255,255,0.04);
  border: 1px solid rgba(255,255,255,0.08);
  border-radius: var(--radius-lg);
  transition: all 0.25s ease; cursor: default;
}
.ch-topo-node:hover {
  background: rgba(99,102,241,0.1);
  border-color: rgba(99,102,241,0.3);
}
.ch-topo-node__icon {
  width: 36px; height: 36px; border-radius: var(--radius-md);
  display: flex; align-items: center; justify-content: center; flex-shrink: 0;
}
.ch-topo-node__icon--blue   { background: rgba(99,102,241,0.15); color: #a5b4fc; }
.ch-topo-node__icon--green  { background: rgba(34,197,94,0.12);  color: #86efac; }
.ch-topo-node__icon--amber  { background: rgba(245,158,11,0.12); color: #fcd34d; }
.ch-topo-node__icon--teal   { background: rgba(20,184,166,0.12); color: #5eead4; }
.ch-topo-node__name { font-size: var(--font-size-sm); font-weight: 600; color: rgba(255,255,255,0.9); }
.ch-topo-node__note { font-size: var(--font-size-xs); color: rgba(255,255,255,0.4); }
.ch-topo-node__badge {
  margin-left: auto; font-size: 10px; font-weight: 700;
  padding: 2px 8px; border-radius: var(--radius-full);
}
.ch-topo-node__badge--active { background: rgba(34,197,94,0.15); color: #86efac; border: 1px solid rgba(34,197,94,0.25); }
.ch-topo-node__badge--new    { background: rgba(99,102,241,0.15); color: #a5b4fc; border: 1px solid rgba(99,102,241,0.3); }
.ch-topo__connector {
  display: flex; align-items: center; justify-content: center;
  color: rgba(255,255,255,0.2); font-size: 10px; gap: 4px; padding: 2px 0;
}
.ch-topo__line {
  flex: 1; height: 1px;
  background: linear-gradient(90deg, transparent, rgba(99,102,241,0.4), transparent);
}

/* ── Типы каналов ── */
.ch-types-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-5);
  margin-top: var(--space-12);
}
@media (max-width: 1024px) { .ch-types-grid { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 640px)  { .ch-types-grid { grid-template-columns: 1fr; } }

.ch-type-card {
  background: var(--color-white);
  border: 2px solid var(--color-gray-100);
  border-radius: var(--radius-2xl);
  padding: var(--space-7);
  transition: all 0.25s ease;
  cursor: default;
  position: relative;
  overflow: hidden;
}
.ch-type-card::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 3px;
}
.ch-type-card--blue::before   { background: linear-gradient(90deg, #6366f1, #60a5fa); }
.ch-type-card--green::before  { background: linear-gradient(90deg, #10b981, #34d399); }
.ch-type-card--amber::before  { background: linear-gradient(90deg, #f59e0b, #fbbf24); }
.ch-type-card--purple::before { background: linear-gradient(90deg, #8b5cf6, #c084fc); }
.ch-type-card--teal::before   { background: linear-gradient(90deg, #14b8a6, #2dd4bf); }
.ch-type-card--rose::before   { background: linear-gradient(90deg, #f43f5e, #fb7185); }

.ch-type-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 12px 32px rgba(0,0,0,0.1);
  border-color: var(--color-brand-200);
}
.ch-type-card__icon {
  width: 52px; height: 52px; border-radius: var(--radius-xl);
  display: flex; align-items: center; justify-content: center;
  margin-bottom: var(--space-4);
}
.ch-type-card--blue   .ch-type-card__icon { background: rgba(99,102,241,0.1);  color: #6366f1; }
.ch-type-card--green  .ch-type-card__icon { background: rgba(16,185,129,0.1);  color: #10b981; }
.ch-type-card--amber  .ch-type-card__icon { background: rgba(245,158,11,0.1);  color: #f59e0b; }
.ch-type-card--purple .ch-type-card__icon { background: rgba(139,92,246,0.1);  color: #8b5cf6; }
.ch-type-card--teal   .ch-type-card__icon { background: rgba(20,184,166,0.1);  color: #14b8a6; }
.ch-type-card--rose   .ch-type-card__icon { background: rgba(244,63,94,0.1);   color: #f43f5e; }

.ch-type-card__label {
  font-size: var(--font-size-xs); text-transform: uppercase; letter-spacing: 0.08em;
  font-weight: 700; margin-bottom: var(--space-2);
}
.ch-type-card--blue   .ch-type-card__label { color: #6366f1; }
.ch-type-card--green  .ch-type-card__label { color: #10b981; }
.ch-type-card--amber  .ch-type-card__label { color: #d97706; }
.ch-type-card--purple .ch-type-card__label { color: #8b5cf6; }
.ch-type-card--teal   .ch-type-card__label { color: #14b8a6; }
.ch-type-card--rose   .ch-type-card__label { color: #f43f5e; }

.ch-type-card__title {
  font-size: var(--font-size-lg); font-weight: var(--font-weight-semibold);
  color: var(--color-gray-900); margin-bottom: var(--space-3);
}
.ch-type-card__desc {
  font-size: var(--font-size-sm); color: var(--color-gray-500);
  line-height: 1.65; margin-bottom: var(--space-4);
}
.ch-type-card__props {
  display: flex; flex-direction: column; gap: var(--space-1);
}
.ch-type-card__prop {
  display: flex; justify-content: space-between; align-items: center;
  font-size: var(--font-size-xs); padding: var(--space-1) 0;
  border-bottom: 1px solid var(--color-gray-50);
}
.ch-type-card__prop:last-child { border-bottom: none; }
.ch-type-card__prop-key { color: var(--color-gray-500); }
.ch-type-card__prop-val { font-weight: 600; color: var(--color-gray-800); }

/* ── Use Cases ── */
.ch-usecases { background: var(--color-gray-50); }
.ch-usecase-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--space-5);
  margin-top: var(--space-12);
}
@media (max-width: 1024px) { .ch-usecase-grid { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 640px)  { .ch-usecase-grid { grid-template-columns: 1fr; } }
.ch-usecase-card {
  background: var(--color-white);
  border: 1px solid var(--color-gray-100);
  border-radius: var(--radius-2xl);
  padding: var(--space-6);
  transition: box-shadow 0.25s;
}
.ch-usecase-card:hover { box-shadow: 0 8px 24px rgba(0,0,0,0.07); }
.ch-usecase-card__num {
  font-size: 2.5rem; font-weight: var(--font-weight-bold);
  color: var(--color-gray-100); line-height: 1;
  margin-bottom: var(--space-3);
}
.ch-usecase-card__title {
  font-size: var(--font-size-base); font-weight: var(--font-weight-semibold);
  color: var(--color-gray-900); margin-bottom: var(--space-2);
}
.ch-usecase-card__desc { font-size: var(--font-size-sm); color: var(--color-gray-500); line-height: 1.6; }

/* ── SLA / Specs table ── */
.ch-specs-section { }
.ch-specs-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-8);
  margin-top: var(--space-12);
  align-items: start;
}
@media (max-width: 900px) { .ch-specs-grid { grid-template-columns: 1fr; } }
.ch-sla-table {
  background: var(--color-white);
  border: 1px solid var(--color-gray-100);
  border-radius: var(--radius-2xl);
  overflow: hidden;
}
.ch-sla-table__head {
  background: var(--color-brand-500);
  color: var(--color-white);
  padding: var(--space-4) var(--space-6);
  font-weight: 700; font-size: var(--font-size-base);
}
.ch-sla-row {
  display: flex; justify-content: space-between; align-items: center;
  padding: var(--space-4) var(--space-6);
  border-bottom: 1px solid var(--color-gray-50);
}
.ch-sla-row:last-child { border-bottom: none; }
.ch-sla-row:nth-child(even) { background: var(--color-gray-50); }
.ch-sla-row__label { font-size: var(--font-size-sm); color: var(--color-gray-600); }
.ch-sla-row__val { font-size: var(--font-size-sm); font-weight: 700; color: var(--color-gray-900); }
.ch-sla-row__val--green { color: #16a34a; }
.ch-sla-row__val--blue  { color: var(--color-brand-600); }

.ch-guarantee-cards {
  display: flex; flex-direction: column; gap: var(--space-4);
}
.ch-guarantee-card {
  background: var(--color-white);
  border: 1px solid var(--color-gray-100);
  border-radius: var(--radius-xl);
  padding: var(--space-5) var(--space-6);
  display: flex; align-items: flex-start; gap: var(--space-4);
  transition: box-shadow 0.25s;
}
.ch-guarantee-card:hover { box-shadow: 0 4px 16px rgba(0,0,0,0.07); }
.ch-guarantee-card__icon {
  width: 44px; height: 44px; border-radius: var(--radius-lg);
  background: rgba(10,108,255,0.08); color: var(--color-brand-500);
  display: flex; align-items: center; justify-content: center; flex-shrink: 0;
}
.ch-guarantee-card__title { font-size: var(--font-size-base); font-weight: var(--font-weight-semibold); color: var(--color-gray-900); margin-bottom: var(--space-1); }
.ch-guarantee-card__desc  { font-size: var(--font-size-sm); color: var(--color-gray-500); line-height: 1.6; }

/* ── Pricing ── */
.ch-plans-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-6);
  margin-top: var(--space-12);
}
@media (max-width: 900px)  { .ch-plans-grid { grid-template-columns: 1fr; max-width: 420px; margin-left: auto; margin-right: auto; } }
.ch-plan {
  background: var(--color-white);
  border: 2px solid var(--color-gray-100);
  border-radius: var(--radius-2xl);
  padding: var(--space-7);
  display: flex; flex-direction: column;
  transition: all 0.25s ease;
  position: relative;
}
.ch-plan:hover {
  box-shadow: 0 12px 32px rgba(0,0,0,0.1);
  transform: translateY(-2px);
}
.ch-plan--featured {
  border-color: var(--color-brand-500);
  box-shadow: 0 8px 32px rgba(10,108,255,0.15);
}
.ch-plan--featured:hover {
  box-shadow: 0 16px 48px rgba(10,108,255,0.2);
}
.ch-plan__badge {
  position: absolute;
  top: -12px; left: 50%; transform: translateX(-50%);
  background: var(--color-brand-500); color: white;
  font-size: var(--font-size-xs); font-weight: 700;
  padding: 4px 16px; border-radius: var(--radius-full);
  white-space: nowrap;
}
.ch-plan__icon {
  width: 52px; height: 52px; border-radius: var(--radius-xl);
  display: flex; align-items: center; justify-content: center;
  margin-bottom: var(--space-4);
}
.ch-plan:not(.ch-plan--featured) .ch-plan__icon { background: var(--color-gray-50); color: var(--color-gray-500); }
.ch-plan--featured .ch-plan__icon { background: rgba(10,108,255,0.1); color: var(--color-brand-500); }
.ch-plan__name { font-size: var(--font-size-lg); font-weight: var(--font-weight-bold); color: var(--color-gray-900); margin-bottom: var(--space-1); }
.ch-plan__desc { font-size: var(--font-size-sm); color: var(--color-gray-500); margin-bottom: var(--space-5); line-height: 1.5; }
.ch-plan__price {
  display: flex; align-items: baseline; gap: 4px; margin-bottom: var(--space-1);
}
.ch-plan__amount { font-size: 2rem; font-weight: var(--font-weight-bold); color: var(--color-gray-900); }
.ch-plan--featured .ch-plan__amount { color: var(--color-brand-600); }
.ch-plan__curr { font-size: var(--font-size-base); color: var(--color-gray-500); }
.ch-plan__period { font-size: var(--font-size-xs); color: var(--color-gray-400); margin-bottom: var(--space-5); }
.ch-plan__features {
  display: flex; flex-direction: column; gap: var(--space-2);
  margin-bottom: var(--space-6); flex: 1;
}
.ch-plan__feat {
  display: flex; align-items: center; gap: var(--space-2);
  font-size: var(--font-size-sm); color: var(--color-gray-600);
}
.ch-plan__feat svg { color: #22c55e; flex-shrink: 0; }
.ch-plan__feat--dim { color: var(--color-gray-400); }
.ch-plan__feat--dim svg { color: var(--color-gray-300); }
.ch-plan__cta { width: 100%; }

/* ── Clients ── */
.ch-clients-section { background: var(--color-gray-50); }
.ch-clients-grid {
  display: grid; grid-template-columns: repeat(3, 1fr);
  gap: var(--space-5); margin-top: var(--space-12);
}
@media (max-width: 900px)  { .ch-clients-grid { grid-template-columns: 1fr; } }
.ch-client-card {
  background: var(--color-white);
  border: 1px solid var(--color-gray-100);
  border-radius: var(--radius-2xl); padding: var(--space-6);
  display: flex; gap: var(--space-4); align-items: flex-start;
  transition: box-shadow 0.25s;
}
.ch-client-card:hover { box-shadow: 0 8px 24px rgba(0,0,0,0.07); }
.ch-client-card__icon {
  width: 48px; height: 48px; border-radius: var(--radius-xl);
  background: rgba(10,108,255,0.08); color: var(--color-brand-500);
  display: flex; align-items: center; justify-content: center; flex-shrink: 0;
}
.ch-client-card__title { font-size: var(--font-size-base); font-weight: var(--font-weight-semibold); color: var(--color-gray-900); margin-bottom: var(--space-1); }
.ch-client-card__desc  { font-size: var(--font-size-sm); color: var(--color-gray-500); line-height: 1.6; }