/* ============================
   Vulkan 777 — landing styles
   ============================ */

:root {
  --color-bg: #0d0d0f;
  --color-bg-2: #16161a;
  --color-bg-3: #1d1d22;
  --color-surface: #22222a;
  --color-border: #2c2c34;
  --color-text: #e9e9ee;
  --color-text-muted: #a8a8b3;
  --color-primary: #e63946;
  --color-primary-hover: #c92a37;
  --color-secondary: #ffb000;
  --color-secondary-hover: #e69d00;
  --color-success: #1f9d55;
  --color-warning: #ff9800;
  --color-info: #3a8cff;

  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 16px;

  --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.25);
  --shadow-md: 0 8px 24px rgba(0, 0, 0, 0.35);
  --shadow-lg: 0 16px 48px rgba(0, 0, 0, 0.5);

  --font-base: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --font-display: "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;

  --container: 1200px;
  --gap: 24px;
}

html { scroll-behavior: smooth; }

body {
  font-family: var(--font-base);
  background: var(--color-bg);
  color: var(--color-text);
  font-size: 16px;
}

/* ============================
   Layout
   ============================ */

.container {
  width: 100%;
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 20px;
}

.skip-link {
  position: absolute;
  top: -40px;
  left: 0;
  background: var(--color-primary);
  color: #fff;
  padding: 8px 16px;
  z-index: 1000;
  border-radius: 0 0 var(--radius-sm) 0;
}
.skip-link:focus { top: 0; }

/* ============================
   Header
   ============================ */

.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(13, 13, 15, 0.95);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--color-border);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  padding: 14px 20px;
}

.logo img {
  height: 63px;
  width: auto;
}

.main-nav ul {
  display: flex;
  gap: 28px;
  align-items: center;
}

.main-nav a {
  color: var(--color-text);
  font-weight: 500;
  font-size: 15px;
  transition: color 0.2s ease;
}
.main-nav a:hover { color: var(--color-secondary); }

.header-cta {
  display: flex;
  gap: 10px;
}

.burger {
  display: none;
  flex-direction: column;
  gap: 5px;
  padding: 8px;
}
.burger span {
  width: 24px;
  height: 2px;
  background: var(--color-text);
  transition: all 0.3s ease;
}

.mobile-menu {
  border-top: 1px solid var(--color-border);
  background: var(--color-bg-2);
  padding: 16px 20px;
}
.mobile-menu ul { display: flex; flex-direction: column; gap: 12px; }
.mobile-menu a { display: block; padding: 8px 0; color: var(--color-text); font-weight: 500; }

/* ============================
   Buttons
   ============================ */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 24px;
  border-radius: var(--radius-md);
  font-weight: 600;
  font-size: 15px;
  line-height: 1.2;
  text-align: center;
  transition: transform 0.15s ease, background 0.2s ease, box-shadow 0.2s ease;
  cursor: pointer;
  white-space: nowrap;
}
.btn:hover { transform: translateY(-1px); }
.btn:active { transform: translateY(0); }

.btn--primary {
  background: linear-gradient(135deg, var(--color-primary), var(--color-primary-hover));
  color: #fff;
  box-shadow: 0 4px 16px rgba(230, 57, 70, 0.35);
}
.btn--primary:hover { background: linear-gradient(135deg, var(--color-primary-hover), var(--color-primary)); }

.btn--secondary {
  background: linear-gradient(135deg, var(--color-secondary), var(--color-secondary-hover));
  color: #1a1a1a;
  box-shadow: 0 4px 16px rgba(255, 176, 0, 0.35);
}

.btn--ghost {
  background: transparent;
  color: var(--color-text);
  border: 1px solid var(--color-border);
}
.btn--ghost:hover {
  background: var(--color-surface);
  border-color: var(--color-secondary);
}

.btn--lg {
  padding: 16px 32px;
  font-size: 16px;
}

.btn--block {
  display: flex;
  width: 100%;
}

/* ============================
   Breadcrumbs
   ============================ */

.breadcrumbs {
  background: var(--color-bg-2);
  border-bottom: 1px solid var(--color-border);
  font-size: 14px;
}
.breadcrumbs ol {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  padding: 12px 0;
  color: var(--color-text-muted);
}
.breadcrumbs li:not(:last-child)::after {
  content: "/";
  margin-left: 8px;
  color: var(--color-text-muted);
}
.breadcrumbs a:hover { color: var(--color-secondary); }
.breadcrumbs [aria-current="page"] { color: var(--color-text); }

/* ============================
   Hero
   ============================ */

.hero {
  position: relative;
  background:
    radial-gradient(1200px 600px at 20% 0%, rgba(230, 57, 70, 0.18), transparent 60%),
    radial-gradient(900px 500px at 90% 100%, rgba(255, 176, 0, 0.12), transparent 60%),
    var(--color-bg);
  padding: 60px 0 50px;
  border-bottom: 1px solid var(--color-border);
}

.hero-inner {
  display: grid;
  grid-template-columns: 1.2fr 1fr;
  gap: 48px;
  align-items: center;
}

.hero-content h1 {
  font-size: clamp(28px, 4vw, 44px);
  line-height: 1.15;
  font-weight: 800;
  margin-bottom: 20px;
  background: linear-gradient(135deg, #fff 0%, #ffd66b 100%);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}

.hero-lead {
  font-size: 17px;
  color: var(--color-text-muted);
  margin-bottom: 28px;
  line-height: 1.7;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin-bottom: 32px;
}

.hero-bullets {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
  padding-top: 24px;
  border-top: 1px solid var(--color-border);
}
.hero-bullets li {
  font-size: 14px;
  color: var(--color-text-muted);
}
.hero-bullets strong {
  display: block;
  font-size: 28px;
  color: var(--color-secondary);
  font-weight: 800;
  line-height: 1;
  margin-bottom: 4px;
}

.hero-image {
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-lg);
  border: 1px solid var(--color-border);
}
.hero-image img {
  width: 100%;
  height: auto;
}

/* ============================
   Article layout
   ============================ */

.article { padding: 60px 0 80px; }

.article-grid {
  display: grid;
  grid-template-columns: 280px 1fr;
  gap: 48px;
  align-items: start;
}

.article-content {
  max-width: 820px;
  font-size: 17px;
  line-height: 1.75;
}

.article-content h2 {
  font-size: clamp(24px, 2.8vw, 32px);
  line-height: 1.25;
  font-weight: 800;
  margin: 0 0 20px;
  color: #fff;
  position: relative;
  padding-left: 16px;
}
.article-content h2::before {
  content: "";
  position: absolute;
  left: 0;
  top: 8px;
  bottom: 8px;
  width: 4px;
  border-radius: 4px;
  background: linear-gradient(to bottom, var(--color-primary), var(--color-secondary));
}

.article-content h3 {
  font-size: clamp(19px, 2vw, 22px);
  font-weight: 700;
  margin: 24px 0 12px;
  color: #fff;
}

.article-content p { margin: 0 0 16px; color: var(--color-text); }
.article-content p:last-child { margin-bottom: 0; }

.article-content strong { color: #fff; }

.block {
  padding: 24px 0 40px;
  scroll-margin-top: 96px;
}
.block + .block { border-top: 1px solid var(--color-border); padding-top: 40px; }

/* TOC */
.toc {
  position: sticky;
  top: 96px;
}
.toc-inner {
  background: var(--color-bg-2);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 24px;
}
.toc-title {
  font-size: 15px;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--color-text-muted);
  font-weight: 600;
  margin-bottom: 16px;
}
.toc ol {
  counter-reset: toc;
  display: flex;
  flex-direction: column;
  gap: 8px;
}
.toc li {
  counter-increment: toc;
  font-size: 14px;
}
.toc a {
  display: block;
  padding: 6px 0 6px 28px;
  color: var(--color-text-muted);
  position: relative;
  transition: color 0.15s ease;
}
.toc a::before {
  content: counter(toc, decimal-leading-zero);
  position: absolute;
  left: 0;
  top: 6px;
  font-weight: 700;
  color: var(--color-secondary);
  font-size: 12px;
}
.toc a:hover { color: #fff; }

/* Lists */
.check-list {
  display: flex;
  flex-direction: column;
  gap: 10px;
  margin: 0 0 20px;
}
.check-list li {
  position: relative;
  padding-left: 28px;
  color: var(--color-text);
}
.check-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 8px;
  width: 16px;
  height: 16px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--color-primary), var(--color-secondary));
  box-shadow: 0 0 0 3px rgba(230, 57, 70, 0.15);
}
.check-list li::after {
  content: "";
  position: absolute;
  left: 5px;
  top: 12px;
  width: 6px;
  height: 3px;
  border-left: 2px solid #fff;
  border-bottom: 2px solid #fff;
  transform: rotate(-45deg);
}

.steps {
  counter-reset: step;
  display: flex;
  flex-direction: column;
  gap: 14px;
  margin: 0 0 20px;
}
.steps li {
  counter-increment: step;
  position: relative;
  padding: 14px 16px 14px 56px;
  background: var(--color-bg-2);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
}
.steps li::before {
  content: counter(step);
  position: absolute;
  left: 14px;
  top: 50%;
  transform: translateY(-50%);
  width: 30px;
  height: 30px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(135deg, var(--color-primary), var(--color-secondary));
  color: #fff;
  font-weight: 800;
  font-size: 15px;
}

/* Figure */
.figure {
  margin: 24px 0;
  border-radius: var(--radius-lg);
  overflow: hidden;
  border: 1px solid var(--color-border);
  box-shadow: var(--shadow-md);
}
.figure img { width: 100%; }
.figure figcaption {
  background: var(--color-bg-2);
  padding: 12px 16px;
  font-size: 14px;
  color: var(--color-text-muted);
  text-align: center;
}

/* Cards */
.cards {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
  margin: 24px 0;
}
.cards--two { grid-template-columns: repeat(2, 1fr); }
.card {
  background: var(--color-bg-2);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  display: flex;
  flex-direction: column;
  transition: transform 0.2s ease, border-color 0.2s ease;
}
.card:hover {
  transform: translateY(-4px);
  border-color: var(--color-secondary);
}
.card img {
  width: 100%;
  aspect-ratio: 5 / 3;
  object-fit: cover;
}
.card h3 { padding: 18px 18px 0; margin: 0 0 10px; }
.card p { padding: 0 18px; margin-bottom: 12px; font-size: 15px; }
.card ul.check-list { padding: 0 18px 18px; margin-bottom: 0; }
.card ul.check-list li { font-size: 14px; }

/* Bonus grid */
.bonus-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 20px;
  margin-top: 24px;
}
.bonus-card {
  background: linear-gradient(135deg, var(--color-bg-2), var(--color-bg-3));
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 24px;
  position: relative;
  overflow: hidden;
}
.bonus-card::before {
  content: "";
  position: absolute;
  top: -50%;
  right: -20%;
  width: 200px;
  height: 200px;
  background: radial-gradient(circle, rgba(255, 176, 0, 0.12), transparent 70%);
  pointer-events: none;
}
.bonus-card h3 {
  margin-top: 0;
  color: var(--color-secondary);
}
.bonus-card p { font-size: 15px; }

/* Compare */
.compare {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 20px;
  margin: 24px 0;
}
.compare-col {
  background: var(--color-bg-2);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 24px;
}
.compare-col--accent {
  border-color: var(--color-primary);
  background: linear-gradient(135deg, rgba(230, 57, 70, 0.08), rgba(255, 176, 0, 0.04));
}
.compare-col h3 { margin-top: 0; }

/* Callout */
.callout {
  margin: 24px 0;
  padding: 18px 20px;
  border-radius: var(--radius-md);
  border-left: 4px solid var(--color-info);
  background: rgba(58, 140, 255, 0.08);
  font-size: 16px;
}
.callout--info { border-color: var(--color-info); background: rgba(58, 140, 255, 0.08); }
.callout--tip { border-color: var(--color-success); background: rgba(31, 157, 85, 0.08); }
.callout--warning { border-color: var(--color-warning); background: rgba(255, 152, 0, 0.08); }

/* CTA block */
.cta-block {
  margin: 32px 0;
  padding: 28px;
  background: linear-gradient(135deg, rgba(230, 57, 70, 0.12), rgba(255, 176, 0, 0.08));
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  text-align: center;
}
.cta-block p {
  margin-bottom: 16px;
  font-size: 17px;
  color: #fff;
}
.cta-block--final {
  margin-top: 24px;
  padding: 36px;
}

/* Table */
.payments-table {
  margin: 20px 0;
  border-radius: var(--radius-md);
  overflow: hidden;
  background: var(--color-bg-2);
  border: 1px solid var(--color-border);
}
.payments-table th,
.payments-table td {
  padding: 14px 18px;
  text-align: left;
  border-bottom: 1px solid var(--color-border);
}
.payments-table th {
  background: var(--color-bg-3);
  color: var(--color-secondary);
  font-weight: 600;
  font-size: 14px;
  text-transform: uppercase;
  letter-spacing: 0.04em;
}
.payments-table tr:last-child td { border-bottom: none; }
.payments-table tr:hover td { background: var(--color-bg-3); }

/* FAQ */
.faq {
  display: flex;
  flex-direction: column;
  gap: 10px;
}
.faq-item {
  background: var(--color-bg-2);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  overflow: hidden;
}
.faq-item[open] { border-color: var(--color-secondary); }
.faq-item summary {
  padding: 18px 56px 18px 20px;
  font-weight: 600;
  font-size: 16px;
  color: #fff;
  cursor: pointer;
  position: relative;
  list-style: none;
  user-select: none;
}
.faq-item summary::-webkit-details-marker { display: none; }
.faq-item summary::after {
  content: "+";
  position: absolute;
  right: 20px;
  top: 50%;
  transform: translateY(-50%);
  width: 28px;
  height: 28px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--color-primary), var(--color-secondary));
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 20px;
  font-weight: 400;
  transition: transform 0.25s ease;
}
.faq-item[open] summary::after {
  content: "−";
  transform: translateY(-50%) rotate(180deg);
}
.faq-answer {
  padding: 0 20px 20px;
  color: var(--color-text);
  font-size: 16px;
}

/* Conclusion */
.conclusion {
  background: linear-gradient(135deg, rgba(230, 57, 70, 0.06), rgba(255, 176, 0, 0.04));
  margin: 40px 0 0;
  padding: 36px;
  border-radius: var(--radius-lg);
  border: 1px solid var(--color-border);
  border-top: 1px solid var(--color-border) !important;
}

/* ============================
   Footer
   ============================ */

.site-footer {
  background: var(--color-bg-2);
  border-top: 1px solid var(--color-border);
  padding: 60px 0 24px;
  margin-top: 60px;
  font-size: 14px;
  color: var(--color-text-muted);
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.5fr 1fr 1fr 1fr;
  gap: 40px;
  margin-bottom: 40px;
}

.footer-col h3 {
  color: #fff;
  font-size: 16px;
  margin-bottom: 16px;
}

.footer-col ul {
  display: flex;
  flex-direction: column;
  gap: 8px;
}
.footer-col a { color: var(--color-text-muted); transition: color 0.15s ease; }
.footer-col a:hover { color: var(--color-secondary); }

.footer-text {
  margin-top: 16px;
  line-height: 1.6;
  font-size: 13px;
}

.footer-bottom {
  border-top: 1px solid var(--color-border);
  padding-top: 24px;
  text-align: center;
  font-size: 13px;
  color: var(--color-text-muted);
}

/* ============================
   Responsive
   ============================ */

@media (max-width: 1024px) {
  .article-grid { grid-template-columns: 1fr; }
  .toc { position: static; }
  .hero-inner { grid-template-columns: 1fr; gap: 32px; }
  .cards { grid-template-columns: repeat(2, 1fr); }
  .footer-grid { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 768px) {
  .main-nav, .header-cta { display: none; }
  .burger { display: flex; }
  .hero { padding: 40px 0; }
  .hero-bullets { grid-template-columns: 1fr; gap: 12px; }
  .hero-bullets strong { font-size: 22px; }
  .cards, .cards--two, .bonus-grid, .compare { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr; gap: 28px; }
  .article-content { font-size: 16px; }
  .article-content h2 { font-size: 22px; }
  .article-content h3 { font-size: 18px; }
  .article { padding: 32px 0 48px; }
  .conclusion, .cta-block--final { padding: 24px 18px; }
  .payments-table th, .payments-table td { padding: 12px 14px; font-size: 14px; }
}

@media (max-width: 480px) {
  .hero-content h1 { font-size: 26px; }
  .hero-actions { flex-direction: column; }
  .hero-actions .btn { width: 100%; }
  .btn--lg { padding: 14px 20px; }
}

/* ============================
   Multi-page additions
   ============================ */

.is-active {
  color: var(--color-secondary) !important;
  font-weight: 700;
}

.hero--inner {
  padding: 50px 0 40px;
}
.hero--inner .hero-content h1 {
  font-size: clamp(26px, 3.5vw, 38px);
}

/* Hub grid (related pages) */
.hub-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 18px;
  margin: 24px 0;
}
.hub-card {
  display: block;
  background: var(--color-bg-2);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 22px;
  transition: transform 0.2s ease, border-color 0.2s ease, box-shadow 0.2s ease;
  text-decoration: none;
  color: inherit;
}
.hub-card:hover {
  transform: translateY(-4px);
  border-color: var(--color-secondary);
  box-shadow: var(--shadow-md);
}
.hub-card h3 {
  margin: 0 0 10px;
  font-size: 18px;
  color: #fff;
}
.hub-card p {
  margin: 0 0 14px;
  font-size: 14px;
  color: var(--color-text-muted);
  line-height: 1.5;
}
.hub-link {
  font-size: 14px;
  font-weight: 600;
  color: var(--color-secondary);
  display: inline-flex;
  align-items: center;
}

/* Related section */
.related {
  border-top: 1px solid var(--color-border) !important;
}

/* Error page */
.error-page {
  padding: 80px 0 60px;
  min-height: 60vh;
  display: flex;
  align-items: center;
}
.error-inner {
  text-align: center;
  max-width: 800px;
  margin: 0 auto;
}
.error-code {
  font-size: clamp(80px, 15vw, 160px);
  line-height: 1;
  font-weight: 900;
  background: linear-gradient(135deg, var(--color-primary), var(--color-secondary));
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  margin-bottom: 20px;
}
.error-inner h1 {
  font-size: clamp(24px, 3vw, 36px);
  margin-bottom: 16px;
  color: #fff;
}
.error-inner p {
  font-size: 17px;
  color: var(--color-text-muted);
  margin-bottom: 28px;
  line-height: 1.6;
}
.error-inner .hero-actions {
  display: flex;
  justify-content: center;
  gap: 14px;
  flex-wrap: wrap;
  margin-bottom: 50px;
}
.error-popular {
  font-size: 20px;
  font-weight: 700;
  color: #fff;
  margin: 40px 0 20px;
  text-align: center;
}

@media (max-width: 1024px) {
  .hub-grid { grid-template-columns: repeat(2, 1fr); }
}

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