/* Device Changer — промо, тёмный tech-стиль */

:root {
  --bg: #0a0b0d;
  --bg-card: #111215;
  --bg-dark: #060709;
  --border: #1e2126;
  --text: #e4e6ea;
  --text-muted: #8b9099;
  --accent: #00d4aa;
  --accent-dim: rgba(0, 212, 170, 0.15);
  --accent-hover: #00f0c0;
  --font-sans: 'Space Grotesk', system-ui, sans-serif;
  --font-mono: 'JetBrains Mono', monospace;
  --radius: 8px;
  --container: min(90vw, 1100px);
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.6;
  color: var(--text);
  background: var(--bg);
  min-height: 100vh;
  position: relative;
}

/* Фоновый грид */
.grid-bg {
  position: fixed;
  inset: 0;
  background-image:
    linear-gradient(rgba(0, 212, 170, 0.03) 1px, transparent 1px),
    linear-gradient(90deg, rgba(0, 212, 170, 0.03) 1px, transparent 1px);
  background-size: 48px 48px;
  pointer-events: none;
  z-index: 0;
}

.container {
  width: 100%;
  max-width: var(--container);
  margin-left: auto;
  margin-right: auto;
  padding-left: 20px;
  padding-right: 20px;
}

/* Header */
.header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(10, 11, 13, 0.9);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--border);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 60px;
}

.logo {
  display: flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
  color: var(--text);
  font-weight: 600;
}

.logo-icon {
  font-family: var(--font-mono);
  color: var(--accent);
  font-size: 1.1rem;
}

.nav {
  display: flex;
  align-items: center;
  gap: 24px;
}

.nav a {
  color: var(--text-muted);
  text-decoration: none;
  font-size: 0.9rem;
  transition: color 0.2s;
}

.nav a:hover {
  color: var(--accent);
}

.nav-user-telegram {
  color: var(--text-muted);
  font-size: 0.9rem;
}

.nav-telegram-login {
  display: inline-flex;
  align-items: center;
  vertical-align: middle;
}

.nav-telegram-login iframe {
  max-height: 32px;
}

.btn-telegram-login {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 16px;
  background: #0088cc;
  color: #fff;
  border: none;
  border-radius: var(--radius);
  font-size: 0.9rem;
  font-weight: 500;
  text-decoration: none;
  transition: background 0.2s;
}

.btn-telegram-login:hover {
  background: #0099dd;
  color: #fff;
}

.auth-block {
  display: inline-flex;
  align-items: center;
  gap: 10px;
}

.auth-logged-in {
  color: var(--text-muted);
  font-size: 0.9rem;
}

.auth-logout-btn {
  padding: 6px 12px;
  font-size: 0.85rem;
  cursor: pointer;
}

.telegram-login-wrap {
  display: inline-block;
  vertical-align: middle;
}

.menu-toggle {
  display: none;
  width: 32px;
  height: 32px;
  background: none;
  border: none;
  cursor: pointer;
  position: relative;
  color: var(--text);
}

.menu-toggle::before,
.menu-toggle::after {
  content: '';
  position: absolute;
  left: 0;
  right: 0;
  height: 2px;
  background: currentColor;
  transition: transform 0.2s;
}

.menu-toggle::before { top: 8px; }
.menu-toggle::after { bottom: 8px; }

.menu-toggle-open::before {
  transform: translateY(6px) rotate(45deg);
}

.menu-toggle-open::after {
  transform: translateY(-6px) rotate(-45deg);
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 10px 20px;
  font-family: var(--font-sans);
  font-size: 0.95rem;
  font-weight: 500;
  text-decoration: none;
  border-radius: var(--radius);
  transition: background 0.2s, color 0.2s, border-color 0.2s;
  cursor: pointer;
  border: 1px solid transparent;
}

.btn-primary {
  background: var(--accent);
  color: var(--bg);
  border-color: var(--accent);
}

.btn-primary:hover {
  background: var(--accent-hover);
  border-color: var(--accent-hover);
  color: var(--bg);
}

.btn-outline {
  background: transparent;
  color: var(--accent);
  border-color: var(--border);
}

.btn-outline:hover {
  border-color: var(--accent);
  background: var(--accent-dim);
}

.btn-telegram {
  background: var(--accent-dim);
  color: var(--accent);
}

.btn-large {
  padding: 14px 28px;
  font-size: 1rem;
}

/* Hero */
.hero {
  padding: 80px 0 100px;
  position: relative;
  z-index: 1;
}

.hero-badge {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--accent);
  margin-bottom: 16px;
  letter-spacing: 0.05em;
}

.hero-title {
  font-size: clamp(2.2rem, 5vw, 3.5rem);
  font-weight: 700;
  margin: 0 0 16px;
  letter-spacing: -0.02em;
}

.hero-subtitle {
  font-size: 1.15rem;
  color: var(--text-muted);
  max-width: 520px;
  margin: 0 0 32px;
  line-height: 1.65;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

/* Sections */
.section {
  padding: 72px 0;
  position: relative;
  z-index: 1;
}

.section-dark {
  background: var(--bg-dark);
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
}

.section-title {
  font-size: 1.5rem;
  font-weight: 600;
  margin: 0 0 32px;
  display: flex;
  align-items: center;
  gap: 12px;
}

.section-num {
  font-family: var(--font-mono);
  font-size: 0.85rem;
  color: var(--accent);
}

.section-desc {
  color: var(--text-muted);
  margin: -8px 0 24px;
  font-size: 0.95rem;
}

.section-desc code {
  font-family: var(--font-mono);
  font-size: 0.85em;
  background: var(--bg-card);
  padding: 2px 6px;
  border-radius: 4px;
}

/* About */
.about-content {
  max-width: 640px;
}

.about-content .lead {
  font-size: 1.1rem;
  margin-bottom: 20px;
}

.about-content p {
  margin: 0 0 16px;
  color: var(--text-muted);
}

.about-content strong {
  color: var(--text);
}

/* Features */
.features-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 20px;
}

.feature-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 24px;
  transition: border-color 0.2s, box-shadow 0.2s;
}

.feature-card:hover {
  border-color: rgba(0, 212, 170, 0.3);
  box-shadow: 0 0 0 1px rgba(0, 212, 170, 0.1);
}

.feature-icon {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--accent);
  margin-bottom: 12px;
  width: 40px;
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--accent-dim);
  border-radius: 6px;
}

.feature-card h3 {
  font-size: 1.1rem;
  margin: 0 0 8px;
}

.feature-card p {
  margin: 0;
  font-size: 0.9rem;
  color: var(--text-muted);
  line-height: 1.55;
}

/* Личный кабинет */
.account-main {
  padding-top: 40px;
  padding-bottom: 60px;
}

.account-profile {
  display: flex;
  align-items: center;
  gap: 20px;
  margin-bottom: 24px;
  padding: 20px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  max-width: 400px;
}

.account-avatar {
  width: 64px;
  height: 64px;
  border-radius: 50%;
  object-fit: cover;
}

.account-avatar-placeholder {
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--accent-dim);
  color: var(--accent);
  font-size: 1.5rem;
  font-weight: 600;
}

.account-info {
  flex: 1;
}

.account-name {
  margin: 0 0 4px;
  font-size: 1.2rem;
  font-weight: 600;
}

.account-username {
  margin: 0;
  font-size: 0.95rem;
  color: var(--text-muted);
}

.account-actions {
  display: flex;
  gap: 12px;
  margin-bottom: 32px;
}

.account-orders-title {
  font-size: 1.1rem;
  margin: 0 0 16px;
  color: var(--text-muted);
}

.account-empty {
  color: var(--text-muted);
  margin: 0;
}

.account-orders-list {
  list-style: none;
  margin: 0;
  padding: 0;
  max-width: 560px;
}

.account-order-card {
  padding: 16px;
  margin-bottom: 12px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
}

.account-order-card.order-paid {
  border-color: var(--accent);
  background: rgba(0, 212, 170, 0.05);
}

.account-order-card.order-expired {
  opacity: 0.7;
}

.account-order-row {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  align-items: center;
  margin-bottom: 8px;
}

.account-order-row:last-of-type {
  margin-bottom: 0;
}

.account-order-id {
  font-weight: 600;
}

.account-order-date,
.account-order-network {
  font-size: 0.9rem;
  color: var(--text-muted);
}

.account-order-status {
  font-size: 0.85rem;
  text-transform: uppercase;
  margin-left: auto;
}

.order-paid .account-order-status { color: var(--accent); }
.order-expired .account-order-status { color: var(--text-muted); }
.order-pending .account-order-status { color: var(--accent-hover); }

.account-order-code-row {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px;
  margin-top: 12px;
  padding-top: 12px;
  border-top: 1px solid var(--border);
}

.account-order-code-label {
  font-size: 0.9rem;
  color: var(--text-muted);
}

.account-order-code {
  font-family: var(--font-mono);
  font-size: 1rem;
  padding: 4px 10px;
  background: var(--bg-dark);
  border-radius: 6px;
  color: var(--accent);
}

.account-order-actions {
  margin-top: 12px;
  padding-top: 12px;
  border-top: 1px solid var(--border);
  display: flex;
  gap: 8px;
}

/* Screenshots — пропорции как у оригиналов (портрет 9:16) */
.screenshots-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(90px, 110px));
  gap: 12px;
  max-width: 560px;
  justify-content: center;
}

.screenshot-wrap {
  aspect-ratio: 9 / 16;
  border-radius: var(--radius);
  overflow: hidden;
  border: 1px solid var(--border);
  background: var(--bg-card);
  cursor: pointer;
  transition: border-color 0.2s;
}

.screenshot-wrap:hover {
  border-color: var(--accent);
}

/* Миниатюры — сохраняем пропорции оригинала, без обрезки */
.screenshots-grid .screenshot-wrap img,
.screenshot-wrap img {
  width: 100%;
  height: 100%;
  display: block;
  object-fit: contain;
  object-position: center;
}

/* Lightbox */
.lightbox {
  position: fixed;
  inset: 0;
  z-index: 1000;
  display: none;
  align-items: center;
  justify-content: center;
  background: rgba(0, 0, 0, 0.85);
  padding: 20px;
  cursor: zoom-out;
}

.lightbox.is-open {
  display: flex;
}

.lightbox-img-wrap {
  max-width: 90vw;
  max-height: 90vh;
  cursor: default;
}

.lightbox-img-wrap img {
  max-width: 100%;
  max-height: 90vh;
  width: auto;
  height: auto;
  object-fit: contain;
  border-radius: var(--radius);
  border: 1px solid var(--border);
}

.lightbox-close {
  position: absolute;
  top: 16px;
  right: 16px;
  width: 40px;
  height: 40px;
  border: none;
  background: var(--bg-card);
  color: var(--text);
  font-size: 1.5rem;
  line-height: 1;
  border-radius: var(--radius);
  cursor: pointer;
  opacity: 0.9;
}

.lightbox-close:hover {
  opacity: 1;
  background: var(--accent);
  color: var(--bg);
}

.screenshot-placeholder {
  aspect-ratio: 9 / 16;
  max-height: 280px;
  background: var(--bg-card);
  border: 1px dashed var(--border);
  border-radius: var(--radius);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-muted);
  font-size: 0.9rem;
}

/* FAQ */
.faq-list {
  max-width: 640px;
}

.faq-item {
  border-bottom: 1px solid var(--border);
}

.faq-item:last-child {
  border-bottom: none;
}

.faq-question {
  font-weight: 500;
  padding: 18px 0;
  cursor: pointer;
  list-style: none;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.faq-question::-webkit-details-marker {
  display: none;
}

.faq-question::after {
  content: '+';
  font-family: var(--font-mono);
  color: var(--accent);
  font-size: 1.2rem;
  transition: transform 0.2s;
}

details[open] .faq-question::after {
  transform: rotate(45deg);
}

.faq-answer {
  padding: 0 0 20px;
  color: var(--text-muted);
  font-size: 0.95rem;
  line-height: 1.6;
}

.faq-teaser {
  margin: 0 0 16px;
  color: var(--text-muted);
  max-width: 520px;
}

.faq-link-wrap {
  margin: 0;
}

/* FAQ page */
.section-faq-page {
  padding-top: 40px;
  padding-bottom: 60px;
}

.faq-back {
  display: inline-block;
  margin-bottom: 24px;
  color: var(--text-muted);
  text-decoration: none;
  font-size: 0.95rem;
}

.faq-back:hover {
  color: var(--accent);
}

.faq-page-title {
  margin: 0 0 12px;
  font-size: 2rem;
  font-weight: 700;
}

.faq-page-lead {
  margin: 0 0 32px;
  color: var(--text-muted);
  max-width: 560px;
}

.faq-page-cta {
  margin: 32px 0 0;
}

.nav a.nav-active {
  color: var(--accent);
}

/* Payment */
.payment-block {
  max-width: 520px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 32px;
}

.payment-desc {
  margin: 0 0 24px;
  color: var(--text-muted);
}

.payment-form .form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
}

.payment-form .form-group {
  margin-bottom: 16px;
}

.payment-form label {
  display: block;
  font-size: 0.9rem;
  font-weight: 500;
  margin-bottom: 6px;
  color: var(--text);
}

.payment-form input,
.payment-form select {
  width: 100%;
  padding: 10px 12px;
  font-family: var(--font-sans);
  font-size: 1rem;
  color: var(--text);
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  transition: border-color 0.2s;
}

.payment-form input:focus,
.payment-form select:focus {
  outline: none;
  border-color: var(--accent);
}

.payment-form input::placeholder {
  color: var(--text-muted);
}

.form-hint {
  font-size: 0.85rem;
  color: var(--text-muted);
  margin: -8px 0 16px;
}

.form-error {
  font-size: 0.9rem;
  color: #e06c6c;
  margin-top: 12px;
}

.form-actions {
  margin-top: 20px;
}

.payment-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-bottom: 16px;
}

.payment-note {
  font-size: 0.85rem;
  color: var(--text-muted);
  margin-top: 20px;
}

.payment-note a {
  color: var(--accent);
  text-decoration: none;
}

.payment-note a:hover {
  text-decoration: underline;
}

.payment-note code {
  font-family: var(--font-mono);
  font-size: 0.9em;
  background: var(--bg);
  padding: 2px 6px;
  border-radius: 4px;
}

.payment-waiting {
  margin-top: 24px;
  padding-top: 24px;
  border-top: 1px solid var(--border);
}

.payment-order-id {
  font-size: 1.1rem;
  font-weight: 600;
  color: var(--accent);
  margin: 0 0 12px;
}

.payment-waiting-title {
  font-size: 1.15rem;
  margin: 0 0 12px;
}

.payment-waiting-footer {
  margin-top: 24px;
  padding-top: 20px;
  border-top: 1px solid var(--border);
}

.payment-waiting-amount {
  font-family: var(--font-mono);
  font-size: 1.1rem;
  color: var(--accent);
  margin: 0 0 4px;
}

.payment-waiting-instruction {
  font-size: 0.9rem;
  color: var(--text-muted);
  margin: 0 0 20px;
}

.payment-qr-wrap {
  margin-bottom: 20px;
}

#payment-qr-container {
  display: inline-block;
  padding: 8px;
  background: #fff;
  border-radius: var(--radius);
  border: 1px solid var(--border);
}

#payment-qr-container img,
#payment-qr-container canvas {
  display: block;
  vertical-align: top;
}

.payment-address-wrap {
  margin-bottom: 16px;
}

.payment-address-label {
  display: block;
  font-size: 0.9rem;
  margin-bottom: 6px;
  color: var(--text-muted);
}

.payment-address-row {
  display: flex;
  gap: 8px;
  align-items: center;
}

.payment-address-input {
  flex: 1;
  padding: 10px 12px;
  font-family: var(--font-mono);
  font-size: 0.85rem;
  color: var(--text);
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
}

.payment-waiting-note {
  font-size: 0.85rem;
  color: var(--text-muted);
  margin: 0 0 16px;
}

.payment-timer {
  font-size: 0.95rem;
  color: var(--accent);
  margin-bottom: 12px;
  font-weight: 500;
}

.payment-status {
  font-size: 0.95rem;
  color: var(--text-muted);
  margin-bottom: 16px;
}

.payment-actions-row {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  align-items: center;
  margin-bottom: 16px;
}

.payment-actions-slot [hidden] {
  display: none !important;
}

.payment-back-row {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  align-items: center;
  margin-top: 20px;
}

#payment-back-btn {
  margin-top: 0;
}

.payment-code-block {
  padding: 20px;
  background: var(--accent-dim);
  border: 1px solid var(--accent);
  border-radius: var(--radius);
}

.payment-code-label {
  margin: 0 0 8px;
  font-size: 0.9rem;
}

.payment-code-value {
  font-family: var(--font-mono);
  font-size: 1.25rem;
  font-weight: 600;
  color: var(--accent);
  margin: 0;
}

/* Success page */
.success-page {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 40px 0;
  position: relative;
  z-index: 1;
}

.success-logo {
  display: inline-flex;
  margin-bottom: 32px;
}

.success-block {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 40px;
  max-width: 440px;
}

.success-title {
  font-size: 1.5rem;
  margin: 0 0 12px;
}

.success-desc {
  color: var(--text-muted);
  margin: 0 0 16px;
}

.success-code {
  font-family: var(--font-mono);
  font-size: 1.5rem;
  font-weight: 600;
  color: var(--accent);
  margin: 0 0 20px;
  letter-spacing: 0.05em;
}

.success-note {
  font-size: 0.9rem;
  color: var(--text-muted);
  margin: 0 0 24px;
}

.success-waiting .success-desc {
  margin-bottom: 24px;
}

.success-spinner {
  width: 32px;
  height: 32px;
  border: 3px solid var(--border);
  border-top-color: var(--accent);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
  margin-bottom: 24px;
}

@keyframes spin {
  to { transform: rotate(360deg); }
}

.success-error .success-desc a {
  color: var(--accent);
}

/* Footer */
.footer {
  padding: 24px 0;
  border-top: 1px solid var(--border);
  position: relative;
  z-index: 1;
}

.footer-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 12px;
}

.footer-copy {
  margin: 0;
  font-size: 0.9rem;
  color: var(--text-muted);
}

.footer a {
  color: var(--accent);
  text-decoration: none;
}

.footer a:hover {
  text-decoration: underline;
}

/* Mobile */
@media (max-width: 768px) {
  .payment-form .form-row {
    grid-template-columns: 1fr;
  }

  .nav {
    position: fixed;
    top: 60px;
    left: 0;
    right: 0;
    background: var(--bg);
    border-bottom: 1px solid var(--border);
    flex-direction: column;
    align-items: stretch;
    padding: 20px;
    gap: 0;
    transform: translateY(-100%);
    opacity: 0;
    visibility: hidden;
    transition: transform 0.2s, opacity 0.2s, visibility 0.2s;
  }

  .nav-open {
    transform: translateY(0);
    opacity: 1;
    visibility: visible;
  }

  .nav a {
    padding: 12px 0;
    border-bottom: 1px solid var(--border);
  }

  .nav a:last-child {
    border-bottom: none;
    margin-top: 8px;
  }

  .menu-toggle {
    display: block;
  }

  .hero {
    padding: 48px 0 64px;
  }

  .section {
    padding: 48px 0;
  }

  .features-grid {
    grid-template-columns: 1fr;
  }
}