:root {
  --bg: #0a0a0a;
  --bg-elevated: #141414;
  --fg: #e5e5e5;
  --fg-muted: #888;
  --accent: #3b82f6;
  --accent-hover: #60a5fa;
  --border: #262626;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: 'Manrope', -apple-system, sans-serif;
  background: var(--bg);
  color: var(--fg);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

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

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

/* Header — sticky на всех страницах */
.header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1rem 2rem;
  max-width: 1400px;
  margin: 0 auto;
  border-bottom: 1px solid var(--border);
  position: sticky;
  top: 0;
  z-index: 100;
  background: var(--bg);
}

.logo {
  font-weight: 600;
  font-size: 1.25rem;
  color: var(--fg);
}

.logo:hover {
  color: var(--fg);
}

.nav {
  display: flex;
  gap: 2rem;
}

.nav a {
  color: var(--fg-muted);
  font-size: 0.9rem;
}

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

/* Buttons */
.btn {
  display: inline-block;
  padding: 0.6rem 1.25rem;
  font-family: inherit;
  font-size: 0.9rem;
  font-weight: 500;
  border-radius: 6px;
  transition: background 0.2s, color 0.2s;
}

.btn-primary {
  background: var(--accent);
  color: white;
  border: none;
}

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

.btn-lg {
  padding: 0.85rem 1.75rem;
  font-size: 1rem;
}

/* Hero */
.hero {
  max-width: 720px;
  margin: 0 auto;
  padding: 5rem 2rem 6rem;
  text-align: center;
}

.hero h1 {
  font-size: clamp(2rem, 5vw, 3rem);
  font-weight: 600;
  margin: 0 0 1rem;
  letter-spacing: -0.02em;
}

.hero-sub {
  font-size: 1.1rem;
  color: var(--fg-muted);
  margin: 0 0 2rem;
}

/* Sections — адаптивная ширина: широко на десктопе, компактно на мобильных */
.section {
  max-width: 1200px;
  margin: 0 auto;
  padding: 4rem 2rem;
}

.section h2 {
  font-size: 1.5rem;
  font-weight: 600;
  margin: 0 0 0.5rem;
}

.section-desc {
  color: var(--fg-muted);
  margin: 0 0 2rem;
}

/* Cards */
.cards {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 1.5rem;
}

.card {
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 1.5rem;
  transition: border-color 0.2s;
}

.card:hover {
  border-color: #333;
}

.card-label {
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.75rem;
  color: var(--accent);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.card h3 {
  font-size: 1rem;
  font-weight: 600;
  margin: 0.5rem 0 0.25rem;
}

.card p {
  font-size: 0.9rem;
  color: var(--fg-muted);
  margin: 0 0 1rem;
}

.card-link {
  font-size: 0.9rem;
  font-weight: 500;
}

/* Prices */
.prices {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  margin-bottom: 1rem;
}

.price-item {
  flex: 1;
  min-width: 120px;
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 1.25rem;
  text-align: center;
}

.price-months {
  display: block;
  font-size: 0.85rem;
  color: var(--fg-muted);
  margin-bottom: 0.25rem;
}

.price-value {
  font-family: 'JetBrains Mono', monospace;
  font-size: 1.25rem;
  font-weight: 500;
}

.prices-note {
  font-size: 0.85rem;
  color: var(--fg-muted);
  margin: 0 0 1.5rem;
}

/* Accordion */
.accordion {
  max-width: 560px;
}

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

.accordion-trigger {
  width: 100%;
  padding: 1rem 0;
  background: none;
  border: none;
  color: var(--fg);
  font-family: inherit;
  font-size: 1rem;
  text-align: left;
  cursor: pointer;
  display: flex;
  justify-content: space-between;
  align-items: center;
  transition: color 0.2s;
}

.accordion-trigger:hover {
  color: var(--accent);
}

.accordion-trigger::after {
  content: '+';
  font-size: 1.25rem;
  color: var(--fg-muted);
  transition: transform 0.2s;
}

.accordion-item.open .accordion-trigger::after {
  transform: rotate(45deg);
}

.accordion-content {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.3s ease;
}

.accordion-item.open .accordion-content {
  max-height: 600px;
}

.accordion-content p {
  margin: 0 0 1rem;
  padding-bottom: 1rem;
  font-size: 0.95rem;
  color: var(--fg-muted);
}

/* Instructions */
.instruction-links {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
}

.instruction-links a {
  padding: 0.5rem 1rem;
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  border-radius: 6px;
  font-size: 0.9rem;
  transition: border-color 0.2s, background 0.2s;
}

.instruction-links a:hover {
  border-color: var(--accent);
  background: rgba(59, 130, 246, 0.08);
}

/* Footer */
.footer {
  max-width: 1200px;
  margin: 0 auto;
  padding: 3rem 2rem;
  border-top: 1px solid var(--border);
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 0.9rem;
  color: var(--fg-muted);
}

/* Auth area */
#auth-area {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.user-area {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

/* Telegram widget — обёртка в тёмном стиле */
.tg-widget-wrap {
  min-height: 40px;
  padding: 6px 12px;
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  border-radius: 6px;
  display: inline-flex;
  align-items: center;
  gap: 8px;
}

.tg-widget-wrap iframe {
  border: none !important;
  vertical-align: middle;
}

/* Скрыть .bot-cta когда пользователь в кабинете */
body.logged-in .bot-cta {
  display: none !important;
}

body.logged-in .hero-cta {
  display: none;
}

/* Card action — кликабельная ссылка в карточке */
.card-action {
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--accent);
  cursor: pointer;
}

.card-action:hover {
  color: var(--accent-hover);
}

.section-foot {
  font-size: 0.9rem;
  color: var(--fg-muted);
  margin-top: 1rem;
}

.section-foot a {
  color: var(--accent);
}

.btn-outline {
  background: transparent;
  border: 1px solid var(--border);
  color: var(--fg);
  padding: 0.4rem 0.8rem;
  font-size: 0.85rem;
  border-radius: 6px;
  cursor: pointer;
}

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

/* Dashboard */
.dashboard-stats {
  display: flex;
  gap: 2rem;
  margin-bottom: 2rem;
}

.stat {
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
}

.stat-label {
  font-size: 0.85rem;
  color: var(--fg-muted);
}

.dashboard-note {
  font-size: 0.9rem;
  color: var(--fg-muted);
  margin: -1rem 0 1.5rem;
}

.replenish-block {
  margin-bottom: 2rem;
}

.replenish-block h3 {
  font-size: 1rem;
  font-weight: 600;
  margin: 0 0 0.5rem;
}

.replenish-btns {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-bottom: 0.5rem;
}

.replenish-btn {
  padding: 0.5rem 1rem;
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  border-radius: 6px;
  color: var(--fg);
  cursor: pointer;
  font-family: inherit;
}

.replenish-btn:hover {
  border-color: var(--accent);
}

.replenish-btn:disabled {
  opacity: 0.6;
  cursor: not-allowed;
}

.replenish-note {
  font-size: 0.85rem;
  color: var(--fg-muted);
  margin: 0;
}

.referral-block {
  margin-top: 1rem;
}

.referral-label {
  font-size: 0.9rem;
  margin: 0 0 0.5rem;
}

.referral-link-wrap {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.5rem;
}

.referral-link-wrap code {
  flex: 1;
  min-width: 200px;
  padding: 0.5rem;
  background: var(--bg-elevated);
  border-radius: 6px;
  font-size: 0.85rem;
  word-break: break-all;
}

.dashboard-note a {
  color: var(--accent);
}

.vpn-type-btns, .extend-btns {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-bottom: 1rem;
}

.vpn-type-btns button, .extend-btns button, .server-btn {
  padding: 0.5rem 1rem;
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  border-radius: 6px;
  color: var(--fg);
  cursor: pointer;
  font-family: inherit;
}

.vpn-type-btns button:hover, .extend-btns button:hover, .server-btn:hover {
  border-color: var(--accent);
}

.vpn-type-btns button:disabled, .extend-btns button:disabled, .server-btn:disabled {
  opacity: 0.6;
  cursor: not-allowed;
}

.loading-text {
  color: var(--fg-muted);
  font-size: 0.9rem;
}

.server-list {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin: 1rem 0;
}

.key-result {
  margin: 1rem 0;
}

.key-result code {
  display: block;
  padding: 1rem;
  background: var(--bg-elevated);
  border-radius: 6px;
  font-size: 0.85rem;
  word-break: break-all;
  margin: 0.5rem 0;
}

/* Cabinet page */
.cabinet-main {
  min-height: calc(100vh - 180px);
}

.cabinet-main .dashboard-section h1 {
  font-size: 1.75rem;
  font-weight: 600;
  margin: 0 0 1.5rem;
}

/* Card action as link */
.card-action-link {
  display: inline-block;
  margin-top: 0.25rem;
}

/* Tablet */
@media (max-width: 900px) {
  .header {
    flex-wrap: wrap;
    gap: 1rem;
    padding: 1rem 1.5rem;
  }

  .nav {
    order: 3;
    width: 100%;
    justify-content: center;
    gap: 1.5rem;
  }

  .section {
    padding: 3rem 1.5rem;
  }

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

  .dashboard-stats {
    flex-direction: column;
    gap: 1rem;
  }
}

/* Mobile */
@media (max-width: 640px) {
  .header {
    flex-wrap: wrap;
    padding: 0.75rem 1rem;
    gap: 0.75rem;
  }

  .header .logo {
    font-size: 1.1rem;
    flex-shrink: 0;
  }

  .nav {
    order: 3;
    width: 100%;
    overflow-x: auto;
    overflow-y: hidden;
    -webkit-overflow-scrolling: touch;
    padding: 0.25rem 0;
    margin: 0 -1rem;
    padding-left: 1rem;
    padding-right: 1rem;
  }

  .nav::-webkit-scrollbar {
    height: 2px;
  }

  .nav {
    display: flex;
    flex-wrap: nowrap;
    gap: 0.75rem;
    justify-content: flex-start;
  }

  .nav a {
    font-size: 0.8rem;
    padding: 0.4rem 0.5rem;
    white-space: nowrap;
    flex-shrink: 0;
  }

  #auth-area {
    flex-shrink: 0;
    gap: 0.4rem;
  }

  .user-area {
    flex-wrap: nowrap;
    gap: 0.4rem;
  }

  .user-area .btn-outline {
    padding: 0.4rem 0.6rem;
    font-size: 0.75rem;
  }

  .bot-cta {
    padding: 0.4rem 0.6rem;
    font-size: 0.75rem;
  }

  .btn, .btn-outline {
    min-height: 36px;
    padding: 0.5rem 0.75rem;
    font-size: 0.8rem;
  }

  .hero {
    padding: 2.5rem 1rem 3.5rem;
  }

  .hero h1 {
    font-size: 1.75rem;
  }

  .hero-sub {
    font-size: 1rem;
  }

  .btn-lg {
    min-height: 48px;
    padding: 0.75rem 1.5rem;
    width: 100%;
    max-width: 280px;
  }

  .section {
    padding: 2.5rem 1rem;
  }

  .section h2 {
    font-size: 1.25rem;
  }

  .prices {
    flex-direction: column;
  }

  .price-item {
    min-width: 100%;
  }

  .vpn-type-btns, .extend-btns, .replenish-btns {
    gap: 0.5rem;
  }

  .vpn-type-btns button, .extend-btns button, .replenish-btn, .server-btn {
    min-height: 44px;
    padding: 0.6rem 1rem;
    font-size: 0.9rem;
    flex: 1 1 40%;
  }

  .instruction-links {
    gap: 0.5rem;
  }

  .instruction-links a {
    flex: 1 1 100%;
    min-height: 44px;
    display: flex;
    align-items: center;
    justify-content: center;
  }

  .accordion-trigger {
    min-height: 48px;
    padding: 1rem 0;
  }

  .footer {
    flex-direction: column;
    gap: 0.5rem;
    text-align: center;
    padding: 2rem 1rem;
  }

  .referral-link-wrap {
    flex-direction: column;
    align-items: stretch;
  }

  .referral-link-wrap code {
    min-width: 0;
  }

  .key-result code {
    font-size: 0.8rem;
  }
}

/* Small mobile */
@media (max-width: 380px) {
  .header {
    padding: 0.5rem 0.75rem;
  }

  .nav a {
    font-size: 0.75rem;
  }

  .user-area span:first-child {
    display: none;
  }

  .hero h1 {
    font-size: 1.5rem;
  }

  .section {
    padding: 2rem 0.75rem;
  }
}