/* ── Main Layout Styles ──────────────────────────────────── */

/* ╔═══════════════╗
   ║   NAVIGATION  ║
   ╚═══════════════╝ */

.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: var(--z-nav);
  padding-block: var(--space-5);
  transition:
    background    500ms cubic-bezier(0.16, 1, 0.3, 1),
    border-color  500ms cubic-bezier(0.16, 1, 0.3, 1),
    padding       500ms cubic-bezier(0.16, 1, 0.3, 1),
    backdrop-filter 500ms cubic-bezier(0.16, 1, 0.3, 1);
  border-bottom: 1px solid transparent;
}

.nav.scrolled {
  background: rgba(8, 8, 8, 0.85);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom-color: var(--color-border);
  padding-block: var(--space-4);
}

.nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-8);
}

.nav-logo {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  text-decoration: none;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: var(--space-8);
}

.nav-links a {
  font-size: var(--text-sm);
  font-weight: var(--weight-medium);
  color: var(--color-text-secondary);
  letter-spacing: var(--tracking-wide);
  transition: color var(--duration-fast) var(--ease-out);
}

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

.nav-cta {
  display: flex;
  align-items: center;
  gap: var(--space-3);
}

/* ── Burger ── */
.burger {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 32px;
  height: 32px;
  cursor: pointer;
  background: none;
  border: none;
  padding: 4px;
}

.burger-line {
  display: block;
  width: 100%;
  height: 1.5px;
  background: var(--color-text);
  border-radius: 2px;
  transform-origin: center;
  transition: transform var(--duration-normal) var(--ease-out),
              opacity var(--duration-normal) var(--ease-out),
              width var(--duration-normal) var(--ease-out);
}

.burger.open .burger-line:nth-child(1) {
  transform: translateY(6.5px) rotate(45deg);
}
.burger.open .burger-line:nth-child(2) {
  opacity: 0;
  transform: scaleX(0);
}
.burger.open .burger-line:nth-child(3) {
  transform: translateY(-6.5px) rotate(-45deg);
}

/* ── Mobile menu ── */
.mobile-menu {
  display: none;
  position: fixed;
  inset: 0;
  z-index: calc(var(--z-nav) - 1);
  background: var(--color-bg);
  padding: var(--space-24) var(--container-pad) var(--space-12);
  flex-direction: column;
  gap: 0;
  opacity: 0;
  transform: translateX(100%);
  transition: opacity var(--duration-normal) var(--ease-out),
              transform var(--duration-normal) var(--ease-out);
}

.mobile-menu.open {
  display: flex;
  opacity: 1;
  transform: translateX(0);
}

.mobile-menu a {
  font-size: var(--text-2xl);
  font-weight: var(--weight-semibold);
  letter-spacing: var(--tracking-tight);
  color: var(--color-text-secondary);
  border-bottom: 1px solid var(--color-border);
  padding: var(--space-5) 0;
  transition: color var(--duration-fast) var(--ease-out);
}

.mobile-menu a:first-child {
  padding-top: 0;
}

.mobile-menu a:hover {
  color: var(--color-text);
}

.mobile-menu-divider {
  width: 100%;
  height: 0;
  border-bottom: 1px solid var(--color-border);
}

.mobile-nav-link--accent {
  color: var(--color-text) !important;
}

/* ╔═══════════════╗
   ║     HERO      ║
   ╚═══════════════╝ */

.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  overflow: hidden;
}

/* Dot-grid background */
.hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background-image:
    radial-gradient(circle, rgba(255,255,255,0.08) 1px, transparent 1px);
  background-size: 40px 40px;
  mask-image: radial-gradient(ellipse 80% 80% at 50% 50%, black 30%, transparent 100%);
  -webkit-mask-image: radial-gradient(ellipse 80% 80% at 50% 50%, black 30%, transparent 100%);
  pointer-events: none;
}

/* Radial gradient center glow */
.hero::after {
  content: '';
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 600px;
  height: 600px;
  background: radial-gradient(circle, rgba(255,255,255,0.04) 0%, transparent 70%);
  pointer-events: none;
}

.hero-inner {
  position: relative;
  z-index: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  gap: var(--space-8);
  padding-block: var(--space-32);
}

.hero-logo-wrap {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-6);
  margin-bottom: var(--space-4);
}

.hero-tagline {
  font-size: var(--text-sm);
  font-weight: var(--weight-medium);
  letter-spacing: var(--tracking-widest);
  text-transform: uppercase;
  color: var(--color-text-secondary);
}

.hero-description {
  max-width: 540px;
  font-size: var(--text-lg);
  color: var(--color-text-secondary);
  line-height: var(--leading-relaxed);
}

.hero-actions {
  display: flex;
  gap: var(--space-4);
  flex-wrap: wrap;
  justify-content: center;
}

.hero-login-mobile {
  display: none;
}
@media (max-width: 768px) {
  .hero-login-mobile {
    display: inline-flex;
  }
}

.hero-scroll-hint {
  position: absolute;
  bottom: var(--space-8);
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-2);
  color: var(--color-text-muted);
  font-size: var(--text-xs);
  letter-spacing: var(--tracking-wide);
  animation: bounce 2s infinite;
}

@keyframes bounce {
  0%, 100% { transform: translateX(-50%) translateY(0);   opacity: 0.4; }
  50%       { transform: translateX(-50%) translateY(8px); opacity: 0.9; }
}

.scroll-arrow {
  width: 1px;
  height: 36px;
  background: linear-gradient(to bottom, transparent, var(--color-border-hover));
  animation: arrow-grow 2s ease-in-out infinite;
}

@keyframes arrow-grow {
  0%    { transform: scaleY(0.6); opacity: 0; }
  40%   { opacity: 1; }
  100%  { transform: scaleY(1); opacity: 0; }
}


/* ╔══════════════════╗
   ║    LOGO SVG      ║
   ╚══════════════════╝ */

.logo-svg {
  width: 72px;
  height: 72px;
  flex-shrink: 0;
}

.logo-svg-sm {
  width: 32px;
  height: 32px;
}

@keyframes logo-pulse {
  0%, 100% {
    filter: drop-shadow(0 0 3px rgba(255,255,255,0.1));
  }
  45%, 55% {
    filter: drop-shadow(0 0 18px rgba(255,255,255,0.35));
  }
}

@keyframes logo-pulse-draw {
  0%    { stroke-dashoffset: 300; opacity: 0.4; }
  40%   { stroke-dashoffset: 0;   opacity: 1;   }
  70%   { stroke-dashoffset: 0;   opacity: 1;   }
  100%  { stroke-dashoffset: -300; opacity: 0.4; }
}

.logo-svg {
  animation: logo-pulse 3.5s ease-in-out infinite;
  transform-origin: center;
}

/* Анимация прохождения пульса по линии */
.logo-svg polyline {
  stroke-dasharray: 300;
  stroke-dashoffset: 300;
  animation: logo-pulse-draw 3.5s ease-in-out infinite;
}


/* ╔══════════════════╗
   ║    FEATURES      ║
   ╚══════════════════╝ */

.features-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: var(--space-5);
}

.feature-card {
  display: flex;
  flex-direction: column;
  gap: var(--space-5);
}

.feature-card .h3 {
  font-size: var(--text-xl);
}

.feature-card p {
  color: var(--color-text-secondary);
  font-size: var(--text-sm);
  line-height: var(--leading-relaxed);
  flex: 1;
}


/* ╔══════════════════╗
   ║    SERVERS       ║
   ╚══════════════════╝ */

.servers-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(180px, 1fr));
  gap: var(--space-4);
}

.server-card {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: var(--space-3);
  padding: var(--space-5) var(--space-6);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  min-height: 120px;
  /* hover properties use fast duration; reveal stagger is set via JS and cleared after animation */
  transition:
    border-color 120ms linear,
    background   120ms linear,
    transform    280ms cubic-bezier(0.34, 1.2, 0.64, 1),
    box-shadow   120ms linear;
  will-change: transform;
}

.server-card:hover {
  border-color: var(--color-border-hover);
  background: var(--color-surface-2);
  transform: translateY(-4px);
  box-shadow: 0 8px 24px rgba(0,0,0,0.4);
}

/* ── Server card top row (flag + ping) ── */
.server-card-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
  gap: var(--space-2);
}

/* ── Ping indicator ── */
.server-ping {
  font-size: var(--text-xs);
  font-weight: var(--weight-semibold);
  font-variant-numeric: tabular-nums;
  letter-spacing: 0.02em;
  line-height: 1;
  transition:
    opacity  200ms var(--ease-out),
    transform 200ms var(--ease-out),
    color    400ms var(--ease-out);
}

/* SVG flag icon from flag-icons library */
.server-flag-icon {
  display: block;
  width: 2.5rem;
  height: 1.875rem;
  border-radius: 4px;
  box-shadow: 0 1px 4px rgba(0,0,0,0.5);
  flex-shrink: 0;
  overflow: hidden;
}

.server-name {
  font-size: var(--text-sm);
  font-weight: var(--weight-semibold);
  color: var(--color-text);
  letter-spacing: var(--tracking-tight);
}

.server-badges {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-1);
  margin-top: auto;
}

/* Online indicator */
.server-card::after {
  content: '';
  position: absolute;
  top: var(--space-4);
  right: var(--space-4);
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: #4ade80;
  box-shadow: 0 0 8px rgba(74, 222, 128, 0.6);
  animation: online-pulse 3s ease-in-out infinite;
}

@keyframes online-pulse {
  0%, 100% { opacity: 1; box-shadow: 0 0 8px rgba(74, 222, 128, 0.6); }
  50%       { opacity: 0.6; box-shadow: 0 0 4px rgba(74, 222, 128, 0.3); }
}

.server-card {
  position: relative;
}


/* ╔══════════════════╗
   ║  HOW IT WORKS    ║
   ╚══════════════════╝ */

.steps-list {
  display: flex;
  flex-direction: column;
  gap: 0;
  max-width: 720px;
  margin-inline: auto;
}

.step-item {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: var(--space-8);
  align-items: start;
  padding-block: var(--space-10);
  border-bottom: 1px solid var(--color-border);
  position: relative;
}

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

.step-left {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-3);
  padding-top: var(--space-2);
}

.step-dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--color-border-hover);
  border: 2px solid var(--color-border);
  flex-shrink: 0;
  transition: background var(--duration-normal) var(--ease-out),
              border-color var(--duration-normal) var(--ease-out);
}

.step-item:hover .step-dot {
  background: var(--color-accent);
  border-color: var(--color-accent);
}

.step-right {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}

.step-right .h3 {
  font-size: var(--text-xl);
}

.step-right p {
  color: var(--color-text-secondary);
  font-size: var(--text-sm);
  line-height: var(--leading-relaxed);
}


/* ╔══════════════════╗
   ║    PRICING       ║
   ╚══════════════════╝ */

.pricing-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: var(--space-5);
  align-items: start;
}

.pricing-card {
  display: flex;
  flex-direction: column;
  gap: var(--space-6);
}

.pricing-badge {
  position: absolute;
  top: -13px;
  left: 50%;
  transform: translateX(-50%);
  font-size: var(--text-xs);
  font-weight: var(--weight-semibold);
  letter-spacing: var(--tracking-wide);
  text-transform: uppercase;
  background: var(--color-accent);
  color: var(--color-bg);
  padding: 3px var(--space-4);
  border-radius: var(--radius-full);
  white-space: nowrap;
}

.pricing-header {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}

.pricing-name {
  font-size: var(--text-base);
  font-weight: var(--weight-medium);
  letter-spacing: var(--tracking-wide);
  text-transform: uppercase;
  color: var(--color-text-secondary);
}

.pricing-price {
  display: flex;
  align-items: baseline;
  gap: var(--space-2);
}

.price-amount {
  font-size: var(--text-4xl);
  font-weight: var(--weight-bold);
  letter-spacing: var(--tracking-tight);
  color: var(--color-text);
}

.price-period {
  font-size: var(--text-sm);
  color: var(--color-text-secondary);
}

.price-placeholder {
  font-size: var(--text-4xl);
  font-weight: var(--weight-bold);
  color: var(--color-text-muted);
  letter-spacing: var(--tracking-tight);
}

.pricing-features {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
  flex: 1;
}

.pricing-feature {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  font-size: var(--text-sm);
  color: var(--color-text-secondary);
}

.pricing-feature::before {
  content: '';
  width: 4px;
  height: 4px;
  border-radius: 50%;
  background: var(--color-border-hover);
  flex-shrink: 0;
}

.pricing-card.card-featured .pricing-feature {
  color: var(--color-text);
}

.pricing-card.card-featured .pricing-feature::before {
  background: var(--color-accent);
}

.price-per-month {
  display: block;
  font-size: var(--text-xs);
  color: var(--color-text-secondary);
  letter-spacing: var(--tracking-wide);
  margin-top: var(--space-1);
}

.pricing-divider {
  height: 1px;
  background: var(--color-border);
  width: 100%;
}


/* ╔══════════════════╗
   ║      FAQ         ║
   ╚══════════════════╝ */

.faq-list {
  max-width: 720px;
  margin-inline: auto;
  display: flex;
  flex-direction: column;
}

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

.faq-question {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-4);
  padding-block: var(--space-6);
  text-align: left;
  font-size: var(--text-base);
  font-weight: var(--weight-medium);
  color: var(--color-text);
  background: none;
  border: none;
  cursor: pointer;
  transition: color var(--duration-fast) var(--ease-out);
}

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

.faq-icon {
  width: 20px;
  height: 20px;
  flex-shrink: 0;
  border-radius: 50%;
  border: 1px solid var(--color-border-hover);
  display: flex;
  align-items: center;
  justify-content: center;
  transition: transform var(--duration-normal) var(--ease-out),
              border-color var(--duration-normal) var(--ease-out),
              background var(--duration-normal) var(--ease-out);
}

.faq-icon svg {
  transition: transform var(--duration-normal) var(--ease-out);
}

.faq-item.open .faq-icon {
  border-color: var(--color-accent);
  background: var(--color-accent-glow);
}

.faq-item.open .faq-icon svg {
  transform: rotate(45deg);
}

.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height var(--duration-slow) var(--ease-out);
}

.faq-answer-inner {
  padding-bottom: var(--space-6);
  font-size: var(--text-sm);
  color: var(--color-text-secondary);
  line-height: var(--leading-relaxed);
}


/* ╔══════════════════╗
   ║    DOWNLOAD      ║
   ╚══════════════════╝ */

.download-section {
  background: var(--color-surface);
  border-top: 1px solid var(--color-border);
  border-bottom: 1px solid var(--color-border);
}

.download-inner {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  gap: var(--space-10);
}

.download-buttons {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-5);
  justify-content: center;
}

.download-btn {
  display: flex;
  align-items: center;
  gap: var(--space-4);
  padding: var(--space-5) var(--space-8);
  border-radius: var(--radius-xl);
  border: 1px solid var(--color-border);
  background: var(--color-surface);
  min-width: 200px;
  position: relative;
  overflow: hidden;
  transition:
    border-color 280ms cubic-bezier(0.16, 1, 0.3, 1),
    transform    280ms cubic-bezier(0.34, 1.2, 0.64, 1),
    box-shadow   280ms cubic-bezier(0.16, 1, 0.3, 1),
    background   280ms cubic-bezier(0.16, 1, 0.3, 1);
}

/* subtle inner top highlight */
.download-btn::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, rgba(255,255,255,0.12), transparent);
}

.download-btn:hover:not(.download-btn-disabled) {
  border-color: rgba(255,255,255,0.25);
  transform: translateY(-4px);
  box-shadow: 0 12px 40px rgba(0,0,0,0.5), 0 0 0 1px rgba(255,255,255,0.08);
  background: var(--color-surface-2);
}

.download-btn-icon {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  border-radius: var(--radius-md);
  background: rgba(255,255,255,0.06);
  border: 1px solid var(--color-border);
  flex-shrink: 0;
  transition: background 280ms var(--ease-out), border-color 280ms var(--ease-out);
}

.download-btn:hover:not(.download-btn-disabled) .download-btn-icon {
  background: rgba(255,255,255,0.1);
  border-color: rgba(255,255,255,0.15);
}

.download-btn-disabled {
  opacity: 0.35;
  cursor: not-allowed;
}

.download-btn-label {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 3px;
}

.download-btn-sub {
  font-size: 11px;
  color: var(--color-text-secondary);
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

.download-btn-name {
  font-size: var(--text-lg);
  font-weight: var(--weight-semibold);
  color: var(--color-text);
  letter-spacing: var(--tracking-tight);
  line-height: 1;
}


/* ╔══════════════════╗
   ║     FOOTER       ║
   ╚══════════════════╝ */

.footer {
  padding-block: var(--space-12);
  border-top: 1px solid var(--color-border);
}

.footer-inner {
  display: grid;
  grid-template-columns: 1fr auto auto auto;
  gap: var(--space-12);
  align-items: start;
}

.footer-brand {
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
  max-width: 280px;
}

.footer-brand p {
  font-size: var(--text-sm);
  color: var(--color-text-secondary);
  line-height: var(--leading-relaxed);
}

.footer-col {
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
}

.footer-col-title {
  font-size: var(--text-xs);
  font-weight: var(--weight-semibold);
  letter-spacing: var(--tracking-widest);
  text-transform: uppercase;
  color: var(--color-text-muted);
}

.footer-col a {
  font-size: var(--text-sm);
  color: var(--color-text-secondary);
  transition: color var(--duration-fast) var(--ease-out);
}

.footer-col a:hover {
  color: var(--color-text);
}

.footer-legal {
  margin-top: var(--space-10);
  padding: var(--space-5) var(--space-6);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  background: var(--color-surface);
}

.footer-legal p {
  font-size: var(--text-xs);
  color: var(--color-text-muted);
  line-height: var(--leading-relaxed);
}

.footer-bottom {
  margin-top: var(--space-6);
  padding-top: var(--space-6);
  border-top: 1px solid var(--color-border);
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: var(--space-4);
}

.footer-bottom p {
  font-size: var(--text-xs);
  color: var(--color-text-muted);
  letter-spacing: var(--tracking-wide);
}


/* ╔══════════════════╗
   ║   RESPONSIVE     ║
   ╚══════════════════╝ */

@media (max-width: 1024px) {
  .footer-inner {
    grid-template-columns: 1fr 1fr;
  }
  .footer-brand {
    grid-column: 1 / -1;
  }
}

@media (max-width: 640px) {
  .footer-inner {
    grid-template-columns: 1fr 1fr;
  }
}

@media (max-width: 768px) {
  .nav-links,
  .nav-cta {
    display: none;
  }

  .burger {
    display: flex;
  }

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

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

  .servers-grid {
    grid-template-columns: repeat(auto-fill, minmax(140px, 1fr));
  }

  .footer-inner {
    grid-template-columns: 1fr;
    gap: var(--space-8);
  }

  .footer-brand {
    grid-column: auto;
  }

  .footer-bottom {
    flex-direction: column;
    align-items: flex-start;
  }

  .hero-actions {
    flex-direction: column;
    align-items: center;
  }

  .step-item {
    grid-template-columns: 1fr;
  }

  .step-left {
    flex-direction: row;
    align-items: center;
  }

  .step-number {
    font-size: 3rem;
  }
}

@media (max-width: 480px) {
  .download-buttons {
    flex-direction: column;
    align-items: center;
  }

  .download-btn {
    width: 100%;
    max-width: 320px;
    min-width: unset;
  }
}