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

/* ---------- Hero CTA ---------- */
.hero-cta {
  display: flex;
  gap: 1rem;
  margin-top: 2rem;
  flex-wrap: wrap;
  justify-content: center;
  will-change: transform;
}

.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-primary--block { width: 100%; }

.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;
}
.btn-ghost--block { width: 100%; }

/* ---------- Section base ---------- */
.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 NFC" block ---------- */
.nfc-explain {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.5rem;
  align-items: center;
  background: rgba(139, 92, 246, 0.08);
  border: 1px solid rgba(139, 92, 246, 0.2);
  border-radius: 20px;
  padding: 2rem;
  margin-bottom: 2rem;
}
.nfc-icon {
  width: 96px;
  height: 96px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: 24px;
  background: linear-gradient(135deg, rgba(139, 92, 246, 0.25), rgba(6, 182, 212, 0.25));
  color: var(--tz-accent-3);
}
.nfc-text p {
  font-size: 1rem;
  line-height: 1.7;
  color: var(--tz-text-muted);
}
.nfc-diff {
  display: grid;
  gap: 0.75rem;
  grid-template-columns: 1fr;
}
.nfc-diff 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;
}
.nfc-diff li:hover {
  transform: translateX(6px);
  border-color: var(--tz-accent);
}
.nfc-diff strong { color: var(--tz-text); }

@media (min-width: 768px) {
  .nfc-explain { grid-template-columns: auto 1fr; }
  .nfc-diff { grid-template-columns: 1fr 1fr; }
}

/* ---------- Advantage grid ---------- */
.adv-grid {
  display: grid;
  gap: 1.25rem;
  grid-template-columns: 1fr;
}
@media (min-width: 768px) {
  .adv-grid { grid-template-columns: repeat(3, 1fr); }
}

/* ---------- Constructor ---------- */
.constructor {
  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: 24px;
  padding: 1.5rem;
  display: grid;
  gap: 1.5rem;
}

.constructor-steps {
  display: flex;
  gap: 0.5rem;
  overflow-x: auto;
  padding-bottom: 0.5rem;
  scrollbar-width: none;
}
.constructor-steps::-webkit-scrollbar { display: none; }

.constructor-step {
  flex: 0 0 auto;
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.6rem 1rem;
  border-radius: 9999px;
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid rgba(255, 255, 255, 0.08);
  color: var(--tz-text-muted);
  font-size: 0.9rem;
  cursor: pointer;
  transition: background 0.2s ease, color 0.2s ease, border-color 0.2s ease, transform 0.2s ease;
  font-family: inherit;
}
.constructor-step:hover { transform: translateY(-1px); border-color: rgba(139, 92, 246, 0.4); }
.constructor-step.is-active {
  background: linear-gradient(135deg, rgba(139, 92, 246, 0.3), rgba(59, 130, 246, 0.3));
  border-color: var(--tz-accent);
  color: var(--tz-text);
}
.step-num {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 22px;
  height: 22px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.1);
  font-size: 0.8rem;
  font-weight: 700;
}
.constructor-step.is-active .step-num {
  background: var(--tz-accent);
  color: #fff;
}

.constructor-panel {
  display: none;
  animation: panel-in 0.35s cubic-bezier(0.4, 0, 0.2, 1);
}
.constructor-panel.is-active { display: block; }
@keyframes panel-in {
  from { opacity: 0; transform: translateY(8px); }
  to   { opacity: 1; transform: translateY(0); }
}
.panel-title {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--tz-text);
  margin-bottom: 0.4rem;
}
.panel-hint {
  font-size: 0.95rem;
  color: var(--tz-text-muted);
  margin-bottom: 1.5rem;
}

/* Design options */
.design-grid {
  display: grid;
  gap: 1rem;
  grid-template-columns: 1fr;
}
.design-option {
  display: flex;
  flex-direction: column;
  gap: 0.6rem;
  background: transparent;
  border: 2px solid transparent;
  border-radius: 16px;
  padding: 0.5rem;
  cursor: pointer;
  font-family: inherit;
  transition: border 0.2s ease, transform 0.2s ease;
  will-change: transform;
}
.design-option:hover { transform: translateY(-2px); }
.design-option.is-selected { border-color: var(--tz-accent); }

.design-mock {
  aspect-ratio: 1.586 / 1; /* standard business-card ratio */
  width: 100%;
  border-radius: 10px;
  display: flex;
  align-items: flex-end;
  justify-content: flex-start;
  padding: 0.8rem;
  font-size: 0.85rem;
  font-weight: 600;
  color: #fff;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  position: relative;
  overflow: hidden;
}
.design-mock--minimal {
  background: #0a0a0f;
  border: 1px solid rgba(255, 255, 255, 0.15);
  color: #fff;
}
.design-mock--gradient {
  background: linear-gradient(135deg, #8B5CF6 0%, #3B82F6 50%, #06B6D4 100%);
  color: #fff;
}
.design-mock--corporate {
  background: #ffffff;
  color: #0a0a0f;
  border: 1px solid #e5e7eb;
}
.design-name {
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--tz-text);
  text-align: left;
  padding-left: 0.25rem;
}
@media (min-width: 600px) {
  .design-grid { grid-template-columns: repeat(3, 1fr); }
}

/* Color swatches */
.color-grid {
  display: grid;
  grid-template-columns: repeat(6, 1fr);
  gap: 0.6rem;
  margin-bottom: 1rem;
}
.color-swatch {
  aspect-ratio: 1;
  width: 100%;
  border-radius: 12px;
  border: 2px solid transparent;
  cursor: pointer;
  transition: transform 0.2s ease, border-color 0.2s ease, box-shadow 0.2s ease;
  will-change: transform;
  padding: 0;
}
.color-swatch:hover { transform: scale(1.05); }
.color-swatch.is-selected {
  border-color: #fff;
  box-shadow: 0 0 0 3px rgba(139, 92, 246, 0.5);
}

.hex-input {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: 12px;
  padding: 0.6rem 1rem;
}
.hex-input span {
  font-size: 0.85rem;
  color: var(--tz-text-muted);
}
.hex-input input {
  flex: 1;
  background: transparent;
  border: none;
  color: var(--tz-text);
  font-family: inherit;
  font-size: 1rem;
  outline: none;
}

/* Fields step */
.fields-grid {
  display: grid;
  gap: 1rem;
  grid-template-columns: 1fr;
}
.field {
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
}
.field span {
  font-size: 0.8rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--tz-text-muted);
}
.field input {
  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;
}
.field input:focus {
  outline: none;
  border-color: var(--tz-accent);
  background: rgba(139, 92, 246, 0.08);
}
.field--full { grid-column: 1 / -1; }
@media (min-width: 600px) {
  .fields-grid { grid-template-columns: 1fr 1fr; }
}

/* Preview step */
.preview-stage {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
  align-items: center;
}
.business-card {
  width: 100%;
  max-width: 420px;
  aspect-ratio: 1.586 / 1;
  border-radius: 14px;
  background: #0a0a0f;
  color: #fff;
  padding: 1.25rem 1.5rem;
  display: grid;
  grid-template-rows: auto 1fr auto;
  box-shadow: 0 20px 50px rgba(0, 0, 0, 0.5), 0 0 0 1px rgba(255, 255, 255, 0.05);
  transition: transform 0.4s cubic-bezier(0.4, 0, 0.2, 1), background 0.3s ease, color 0.3s ease;
  will-change: transform;
  transform-style: preserve-3d;
}
.business-card:hover { transform: rotateX(4deg) rotateY(-4deg) scale(1.02); }
.business-card[data-design="gradient"] {
  background: linear-gradient(135deg, var(--card-color) 0%, #3B82F6 60%, #06B6D4 100%);
}
.business-card[data-design="corporate"] {
  background: #ffffff;
  color: #0a0a0f;
  box-shadow: 0 20px 50px rgba(0, 0, 0, 0.4), 0 0 0 1px #e5e7eb;
}
.bc-top {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 0.95rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  opacity: 0.9;
}
.bc-nfc {
  font-size: 1.4rem;
  color: var(--card-color, #8B5CF6);
  filter: drop-shadow(0 0 6px currentColor);
}
.business-card[data-design="corporate"] .bc-nfc { color: var(--card-color, #0a0a0f); }
.bc-mid { display: flex; flex-direction: column; justify-content: center; }
.bc-name {
  font-size: 1.4rem;
  font-weight: 800;
  margin: 0;
  letter-spacing: -0.01em;
}
.bc-role {
  font-size: 0.85rem;
  opacity: 0.75;
  margin-top: 0.15rem;
}
.bc-bot p {
  font-size: 0.78rem;
  opacity: 0.85;
  margin: 0.1rem 0;
}

.preview-actions {
  display: flex;
  gap: 0.75rem;
  flex-wrap: wrap;
  justify-content: center;
}

.constructor-nav {
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  padding-top: 0.5rem;
  border-top: 1px solid rgba(255, 255, 255, 0.08);
}

/* ---------- Pricing ---------- */
.pricing-grid {
  display: grid;
  gap: 1.5rem;
  grid-template-columns: 1fr;
}
@media (min-width: 768px) {
  .pricing-grid { grid-template-columns: repeat(3, 1fr); }
}

.price-card {
  position: relative;
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: 20px;
  padding: 2rem 1.75rem;
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
  transition: transform 0.3s cubic-bezier(0.4, 0, 0.2, 1), border-color 0.3s ease, box-shadow 0.3s ease;
  will-change: transform;
}
.price-card:hover {
  transform: translateY(-8px);
  border-color: var(--tz-accent);
  box-shadow: 0 20px 50px rgba(139, 92, 246, 0.25);
}
.price-card--featured {
  background: linear-gradient(160deg, rgba(139, 92, 246, 0.18), rgba(6, 182, 212, 0.12));
  border-color: var(--tz-accent);
  box-shadow: 0 10px 30px rgba(139, 92, 246, 0.2);
}
.price-badge {
  position: absolute;
  top: -12px;
  right: 1.5rem;
  background: linear-gradient(135deg, #8B5CF6, #3B82F6);
  color: #fff;
  font-size: 0.7rem;
  font-weight: 700;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  padding: 0.3rem 0.8rem;
  border-radius: 9999px;
}
.price-name {
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--tz-text-muted);
  letter-spacing: 0.05em;
  text-transform: uppercase;
  margin: 0;
}
.price-amount {
  font-size: clamp(2rem, 4vw + 1rem, 2.75rem);
  font-weight: 800;
  color: var(--tz-text);
  line-height: 1;
  margin: 0;
}
.price-amount span {
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--tz-text-muted);
  margin-left: 0.25rem;
}
.price-features {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  flex-grow: 1;
}
.price-features li {
  position: relative;
  padding-left: 1.5rem;
  color: var(--tz-text-muted);
  font-size: 0.95rem;
  line-height: 1.5;
}
.price-features li::before {
  content: "✓";
  position: absolute;
  left: 0;
  top: 0;
  color: var(--tz-accent-3);
  font-weight: 700;
}
.pricing-foot {
  text-align: center;
  margin-top: 2rem;
  color: var(--tz-text-muted);
}
.pricing-foot a {
  color: var(--tz-accent-3);
  font-weight: 600;
}
.pricing-foot a:hover { color: var(--tz-accent); }

/* ---------- AI CHAT WIDGET ---------- */
.chat-widget {
  position: fixed;
  bottom: 24px;
  right: 24px;
  width: 60px;
  height: 60px;
  border-radius: 50%;
  background: linear-gradient(135deg, #8B5CF6, #3B82F6);
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  z-index: 9999;
  box-shadow: 0 8px 24px rgba(139, 92, 246, 0.4);
  border: none;
  transition: transform 0.2s ease, box-shadow 0.2s ease;
  will-change: transform;
}
.chat-widget:hover {
  transform: scale(1.08);
  box-shadow: 0 12px 32px rgba(139, 92, 246, 0.6);
}
.chat-widget::after {
  content: "";
  position: absolute;
  inset: 0;
  border-radius: 50%;
  background: inherit;
  opacity: 0.4;
  z-index: -1;
  animation: chat-pulse 2.5s ease-in-out infinite;
}
@keyframes chat-pulse {
  0%, 100% { transform: scale(1); opacity: 0.4; }
  50%      { transform: scale(1.4); opacity: 0; }
}

.chat-window {
  position: fixed;
  bottom: 96px;
  right: 24px;
  width: 380px;
  max-width: calc(100vw - 48px);
  height: 500px;
  max-height: 60vh;
  background: #0f0f17;
  border: 1px solid rgba(139, 92, 246, 0.3);
  border-radius: 16px;
  display: none;
  flex-direction: column;
  z-index: 9999;
  overflow: hidden;
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.5);
  animation: chat-pop 0.25s cubic-bezier(0.4, 0, 0.2, 1);
  will-change: transform, opacity;
}
.chat-window.open { display: flex; }
@keyframes chat-pop {
  from { opacity: 0; transform: translateY(12px) scale(0.96); }
  to   { opacity: 1; transform: translateY(0) scale(1); }
}

.chat-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1rem 1.25rem;
  background: linear-gradient(135deg, rgba(139, 92, 246, 0.2), rgba(59, 130, 246, 0.2));
  border-bottom: 1px solid rgba(139, 92, 246, 0.2);
}
.chat-title {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-weight: 700;
  font-size: 0.95rem;
  color: var(--tz-text);
}
.chat-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: #22c55e;
  box-shadow: 0 0 8px #22c55e;
  animation: chat-blink 2s ease-in-out infinite;
}
@keyframes chat-blink {
  0%, 100% { opacity: 1; }
  50%      { opacity: 0.4; }
}
.chat-close {
  background: transparent;
  border: none;
  color: var(--tz-text-muted);
  font-size: 1.5rem;
  line-height: 1;
  cursor: pointer;
  padding: 0.25rem 0.5rem;
  font-family: inherit;
  transition: color 0.2s ease;
}
.chat-close:hover { color: var(--tz-text); }

.chat-body {
  flex: 1;
  padding: 1rem 1.25rem;
  overflow-y: auto;
  display: flex;
  flex-direction: column;
  gap: 0.6rem;
  scrollbar-width: thin;
  scrollbar-color: rgba(139, 92, 246, 0.3) transparent;
}
.chat-body::-webkit-scrollbar { width: 4px; }
.chat-body::-webkit-scrollbar-thumb { background: rgba(139, 92, 246, 0.3); border-radius: 2px; }

.chat-message {
  max-width: 85%;
  padding: 0.65rem 0.9rem;
  border-radius: 14px;
  font-size: 0.92rem;
  line-height: 1.45;
  animation: msg-in 0.3s ease-out;
}
@keyframes msg-in {
  from { opacity: 0; transform: translateY(6px); }
  to   { opacity: 1; transform: translateY(0); }
}
.chat-message.bot {
  background: rgba(139, 92, 246, 0.15);
  color: var(--tz-text);
  align-self: flex-start;
  border-bottom-left-radius: 4px;
}
.chat-message.user {
  background: rgba(59, 130, 246, 0.2);
  color: var(--tz-text);
  align-self: flex-end;
  border-bottom-right-radius: 4px;
}

.chat-input {
  display: flex;
  gap: 0.5rem;
  padding: 0.75rem 1rem;
  border-top: 1px solid rgba(255, 255, 255, 0.06);
  background: rgba(0, 0, 0, 0.25);
}
.chat-input input {
  flex: 1;
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: 9999px;
  padding: 0.55rem 1rem;
  color: var(--tz-text);
  font-family: inherit;
  font-size: 0.9rem;
  transition: border-color 0.2s ease;
}
.chat-input input:focus {
  outline: none;
  border-color: var(--tz-accent);
}
.chat-input input:disabled { opacity: 0.6; cursor: not-allowed; }
.chat-input button {
  background: linear-gradient(135deg, #8B5CF6, #3B82F6);
  border: none;
  width: 40px;
  height: 40px;
  border-radius: 50%;
  color: #fff;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  transition: transform 0.2s ease, opacity 0.2s ease;
  font-family: inherit;
}
.chat-input button:disabled { opacity: 0.5; cursor: not-allowed; }
.chat-input button:hover:not(:disabled) { transform: scale(1.05); }

/* ---------- Reveal animation (GPU) ---------- */
[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) {
  .business-card,
  .price-card,
  .chat-widget,
  [data-reveal] {
    transition: none;
  }
  .chat-widget::after { animation: none; }
  .chat-dot { animation: none; }
}

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