/* ==========================================================================
   NEXITALLY.WIKI — SWISS INTERNATIONAL TYPOGRAPHIC STYLE SYSTEM
   Design Manifesto:
   - Pure White Canvas: #ffffff
   - Near Black Precision Typography: #0a0a0a
   - Accent Monolith: Signal Red #ff3b30 (Exclusively appearing as a solid dot ●)
   - Layout: Strict 1px / 2px Grid lines, tight kerning, uppercase kicker headlines
   - Zero unnecessary decorations, ultra-minimal, instant load speed
   ========================================================================== */

@import url('https://fonts.googleapis.com/css2?family=Space+Grotesk:wght@400;500;600;700&display=swap');

:root {
  --bg-pure: #ffffff;
  --bg-subtle: #f8f8f8;
  --bg-card: #ffffff;
  --text-main: #0a0a0a;
  --text-muted: #555555;
  --text-dim: #888888;
  --border-light: #e6e6e6;
  --border-heavy: #0a0a0a;
  --signal-red: #ff3b30;
  
  --font-sans: 'Space Grotesk', -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  --font-mono: 'SFMono-Regular', Consolas, 'Liberation Mono', Menlo, Courier, monospace;
  
  --container-max: 1240px;
  --transition: all 0.2s ease-in-out;
}

*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
  font-family: var(--font-sans);
  background-color: var(--bg-pure);
  color: var(--text-main);
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  background-color: var(--bg-pure);
  color: var(--text-main);
  min-height: 100vh;
  overflow-x: hidden;
  font-size: 16px;
}

/* Links & Defaults */
a {
  color: inherit;
  text-decoration: none;
}

img {
  max-width: 100%;
  height: auto;
  display: block;
}

/* Container */
.container {
  width: 100%;
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 24px;
}

/* Signal Red Dot */
.dot {
  color: var(--signal-red);
  display: inline-block;
  font-size: 0.85em;
  line-height: 1;
  vertical-align: middle;
}

.red-dot-symbol {
  width: 10px;
  height: 10px;
  background-color: var(--signal-red);
  border-radius: 50%;
  display: inline-block;
}

/* Header & Navigation (Swiss Top Bar) */
.swiss-header {
  position: sticky;
  top: 0;
  background-color: var(--bg-pure);
  border-bottom: 1px solid var(--border-light);
  z-index: 1000;
  height: 64px;
}

.header-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 64px;
}

.brand-mark {
  font-size: 1.25rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  text-transform: uppercase;
  display: flex;
  align-items: center;
  gap: 6px;
}

.brand-sub {
  font-size: 0.75rem;
  font-weight: 500;
  color: var(--text-dim);
  letter-spacing: 0.08em;
  border-left: 1px solid var(--border-light);
  padding-left: 8px;
  margin-left: 4px;
}

.nav-links {
  display: flex;
  align-items: center;
  list-style: none;
  gap: 28px;
}

.nav-link {
  font-size: 0.8125rem;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--text-muted);
  transition: var(--transition);
}

.nav-link:hover, .nav-link.active {
  color: var(--text-main);
}

.nav-link.highlight {
  color: var(--text-main);
  border-bottom: 2px solid var(--border-heavy);
  padding-bottom: 2px;
}

.header-right {
  display: flex;
  align-items: center;
  gap: 16px;
}

.cta-header-btn {
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  padding: 8px 16px;
  background-color: var(--text-main);
  color: #ffffff;
  border: 1px solid var(--text-main);
  transition: var(--transition);
}

.cta-header-btn:hover {
  background-color: transparent;
  color: var(--text-main);
}

.mobile-menu-btn {
  display: none;
  background: none;
  border: none;
  font-size: 1.25rem;
  cursor: pointer;
  padding: 8px;
}

/* Swiss Buttons */
.btn-swiss {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  font-family: var(--font-sans);
  font-size: 0.875rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  padding: 16px 32px;
  transition: var(--transition);
  cursor: pointer;
  border-radius: 0;
}

.btn-solid {
  background-color: var(--text-main);
  color: #ffffff;
  border: 2px solid var(--text-main);
}

.btn-solid:hover {
  background-color: transparent;
  color: var(--text-main);
}

.btn-outline {
  background-color: transparent;
  color: var(--text-main);
  border: 2px solid var(--text-main);
}

.btn-outline:hover {
  background-color: var(--text-main);
  color: #ffffff;
}

/* Section Common Structure */
.section-pad {
  padding: 80px 0;
  border-bottom: 1px solid var(--border-light);
}

.section-kicker {
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--text-dim);
  margin-bottom: 16px;
  display: flex;
  align-items: center;
  gap: 8px;
}

.section-title {
  font-size: 2.25rem;
  font-weight: 700;
  letter-spacing: -0.03em;
  line-height: 1.1;
  text-transform: uppercase;
  margin-bottom: 24px;
}

.section-desc {
  font-size: 1.05rem;
  color: var(--text-muted);
  max-width: 680px;
  line-height: 1.6;
}

/* Hero Section */
.hero-section {
  padding: 70px 0 60px 0;
  border-bottom: 2px solid var(--border-heavy);
}

.hero-rule {
  width: 100%;
  height: 2px;
  background-color: var(--border-heavy);
  margin-bottom: 24px;
}

.hero-kicker {
  font-size: 0.8125rem;
  font-weight: 700;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--text-muted);
  margin-bottom: 16px;
  display: flex;
  align-items: center;
  gap: 10px;
}

.hero-title {
  font-size: clamp(48px, 8vw, 130px);
  font-weight: 700;
  letter-spacing: -0.04em;
  line-height: 0.95;
  text-transform: uppercase;
  margin-bottom: 32px;
  word-wrap: break-word;
}

.hero-subrow {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 40px;
  align-items: end;
  margin-bottom: 60px;
}

.hero-intro {
  font-size: 1.125rem;
  line-height: 1.65;
  color: var(--text-muted);
}

.hero-actions {
  display: flex;
  align-items: center;
  gap: 20px;
  flex-wrap: wrap;
}

/* 3-Column Metrics (Swiss Data Columns) */
.hero-metrics {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  border-top: 1px solid var(--border-light);
  padding-top: 40px;
}

.metric-col {
  padding-left: 24px;
  border-left: 1px solid var(--border-heavy);
}

.metric-col:first-child {
  padding-left: 0;
  border-left: none;
}

.metric-value {
  font-size: clamp(2rem, 3.5vw, 3.5rem);
  font-weight: 700;
  line-height: 1;
  letter-spacing: -0.03em;
  margin-bottom: 8px;
  font-feature-settings: "tnum";
}

.metric-label {
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--text-dim);
}

/* Feature 3 Cards (Grid) */
.features-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 32px;
  margin-top: 48px;
}

.feature-box {
  border: 1px solid var(--border-light);
  padding: 36px 28px;
  background-color: var(--bg-pure);
  transition: var(--transition);
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}

.feature-box:hover {
  border-color: var(--border-heavy);
  transform: translateY(-2px);
}

.feature-num {
  font-size: 0.8125rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  color: var(--text-dim);
  margin-bottom: 24px;
  display: block;
}

.feature-heading {
  font-size: 1.35rem;
  font-weight: 700;
  line-height: 1.25;
  letter-spacing: -0.02em;
  margin-bottom: 16px;
}

.feature-text {
  font-size: 0.9375rem;
  color: var(--text-muted);
  line-height: 1.6;
  margin-bottom: 24px;
}

.feature-tag {
  font-size: 0.6875rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--text-main);
  background-color: var(--bg-subtle);
  padding: 4px 8px;
  align-self: flex-start;
  border-left: 2px solid var(--border-heavy);
}

/* Streaming & AI Matrix Cards */
.matrix-container {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 32px;
  margin-top: 48px;
}

.matrix-card {
  border: 1px solid var(--border-light);
  padding: 36px 32px;
  background-color: var(--bg-pure);
}

.matrix-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  border-bottom: 1px solid var(--border-light);
  padding-bottom: 16px;
  margin-bottom: 24px;
}

.matrix-title {
  font-size: 1.25rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  text-transform: uppercase;
}

.matrix-badge {
  font-size: 0.6875rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  background: var(--text-main);
  color: #fff;
  padding: 4px 10px;
}

.matrix-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.matrix-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 12px 0;
  border-bottom: 1px dashed var(--border-light);
}

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

.matrix-item-name {
  font-size: 0.9375rem;
  font-weight: 600;
  display: flex;
  align-items: center;
  gap: 10px;
}

.matrix-item-status {
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: #10b981;
}

/* Pricing Section (Real Reference Table) */
.pricing-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  margin-top: 48px;
}

.pricing-card {
  border: 1px solid var(--border-light);
  padding: 40px 32px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  background-color: var(--bg-pure);
  position: relative;
  transition: var(--transition);
}

.pricing-card.featured {
  border: 2px solid var(--border-heavy);
  box-shadow: 6px 6px 0px var(--border-heavy);
}

.pricing-plan-badge {
  position: absolute;
  top: -12px;
  right: 24px;
  background: var(--text-main);
  color: #ffffff;
  font-size: 0.6875rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  padding: 4px 12px;
}

.plan-kicker {
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--text-dim);
  margin-bottom: 8px;
}

.plan-name {
  font-size: 1.5rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  margin-bottom: 16px;
}

.plan-price-row {
  display: flex;
  align-items: baseline;
  gap: 6px;
  margin-bottom: 24px;
  padding-bottom: 20px;
  border-bottom: 1px solid var(--border-light);
}

.plan-currency {
  font-size: 1.25rem;
  font-weight: 700;
}

.plan-price {
  font-size: 3rem;
  font-weight: 700;
  line-height: 1;
  letter-spacing: -0.03em;
  font-feature-settings: "tnum";
}

.plan-period {
  font-size: 0.8125rem;
  color: var(--text-dim);
  font-weight: 500;
}

.plan-specs {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 14px;
  margin-bottom: 32px;
}

.plan-spec-item {
  font-size: 0.875rem;
  color: var(--text-muted);
  display: flex;
  align-items: flex-start;
  gap: 10px;
  line-height: 1.4;
}

.plan-spec-item::before {
  content: "—";
  color: var(--border-heavy);
  font-weight: bold;
}

/* Swiss Numbered Index Table */
.index-table-wrap {
  margin-top: 48px;
  border-top: 2px solid var(--border-heavy);
}

.index-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 24px 20px;
  border-bottom: 1px solid var(--border-light);
  cursor: pointer;
  transition: background-color 0.15s ease, color 0.15s ease;
}

.index-row:hover {
  background-color: var(--border-heavy);
  color: #ffffff;
}

.index-row:hover .index-num,
.index-row:hover .index-desc {
  color: #cccccc;
}

.index-row:hover .index-arrow {
  opacity: 1;
  transform: translateX(6px);
}

.index-left {
  display: flex;
  align-items: baseline;
  gap: 32px;
}

.index-num {
  font-size: 0.875rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  color: var(--text-dim);
  font-feature-settings: "tnum";
  min-width: 30px;
}

.index-title {
  font-size: 1.25rem;
  font-weight: 700;
  letter-spacing: -0.02em;
}

.index-desc {
  font-size: 0.875rem;
  color: var(--text-muted);
  margin-left: 20px;
}

.index-arrow {
  font-size: 1.25rem;
  font-weight: 700;
  opacity: 0;
  transition: var(--transition);
}

/* FAQ Accordion / Grid */
.faq-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 24px;
  margin-top: 48px;
}

.faq-card {
  border: 1px solid var(--border-light);
  padding: 28px 24px;
  background-color: var(--bg-pure);
}

.faq-card h3 {
  font-size: 1.05rem;
  font-weight: 700;
  letter-spacing: -0.01em;
  margin-bottom: 12px;
  display: flex;
  align-items: flex-start;
  gap: 10px;
}

.faq-card p {
  font-size: 0.9rem;
  color: var(--text-muted);
  line-height: 1.6;
  padding-left: 22px;
}

/* User Reviews Section */
.reviews-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  margin-top: 48px;
}

.review-box {
  border: 1px solid var(--border-light);
  padding: 28px 24px;
  background-color: var(--bg-pure);
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}

.review-text {
  font-size: 0.9375rem;
  color: var(--text-muted);
  line-height: 1.6;
  margin-bottom: 20px;
  font-style: normal;
}

.review-author-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  border-top: 1px solid var(--border-light);
  padding-top: 14px;
}

.review-author {
  font-size: 0.8125rem;
  font-weight: 700;
  color: var(--text-main);
}

.review-role {
  font-size: 0.6875rem;
  color: var(--text-dim);
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

.review-stars {
  color: var(--text-main);
  font-size: 0.75rem;
  letter-spacing: 2px;
}

/* Swiss Minimal Footer */
.swiss-footer {
  border-top: 2px solid var(--border-heavy);
  padding: 60px 0 40px 0;
  background-color: var(--bg-pure);
}

.footer-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 40px;
}

.footer-brand {
  font-size: 1.25rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: -0.02em;
}

/* Strict 4 links footer as requested */
.footer-four-links {
  list-style: none;
  display: flex;
  align-items: center;
  gap: 36px;
  flex-wrap: wrap;
}

.footer-four-link {
  font-size: 0.875rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--text-main);
  border-bottom: 1px solid transparent;
  padding-bottom: 2px;
  transition: var(--transition);
}

.footer-four-link:hover {
  border-bottom-color: var(--border-heavy);
}

.footer-bottom {
  display: flex;
  align-items: center;
  justify-content: space-between;
  border-top: 1px solid var(--border-light);
  padding-top: 24px;
  font-size: 0.75rem;
  color: var(--text-dim);
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

/* Article / Document Page Styles (For 2000-3000 words SEO Content) */
.article-header-wrap {
  padding: 60px 0 40px 0;
  border-bottom: 1px solid var(--border-light);
}

.article-meta-row {
  display: flex;
  align-items: center;
  gap: 20px;
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--text-dim);
  margin-bottom: 20px;
}

.article-main-title {
  font-size: clamp(2rem, 4vw, 3.25rem);
  font-weight: 700;
  letter-spacing: -0.03em;
  line-height: 1.15;
  margin-bottom: 24px;
}

.article-summary-lead {
  font-size: 1.15rem;
  line-height: 1.7;
  color: var(--text-muted);
  border-left: 3px solid var(--border-heavy);
  padding-left: 20px;
  margin-bottom: 40px;
  background-color: var(--bg-subtle);
  padding: 20px;
}

.article-body-layout {
  display: grid;
  grid-template-columns: 280px 1fr;
  gap: 60px;
  padding: 60px 0 100px 0;
}

.article-sidebar {
  position: sticky;
  top: 90px;
  align-self: start;
  border-right: 1px solid var(--border-light);
  padding-right: 24px;
}

.toc-title {
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--text-dim);
  margin-bottom: 16px;
}

.toc-nav {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.toc-link {
  font-size: 0.8125rem;
  color: var(--text-muted);
  line-height: 1.4;
  transition: var(--transition);
}

.toc-link:hover {
  color: var(--text-main);
  font-weight: 600;
  padding-left: 4px;
}

.article-content {
  font-size: 1.05rem;
  line-height: 1.8;
  color: #222222;
}

.article-content h2 {
  font-size: 1.75rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  margin: 48px 0 20px 0;
  padding-bottom: 12px;
  border-bottom: 2px solid var(--border-heavy);
  text-transform: uppercase;
}

.article-content h3 {
  font-size: 1.3rem;
  font-weight: 700;
  letter-spacing: -0.01em;
  margin: 32px 0 16px 0;
}

.article-content p {
  margin-bottom: 24px;
}

.article-content ul, .article-content ol {
  margin: 0 0 24px 24px;
  line-height: 1.8;
}

.article-content li {
  margin-bottom: 8px;
}

.article-content strong {
  color: var(--text-main);
  font-weight: 700;
}

.article-content a {
  color: var(--text-main);
  text-decoration: underline;
  text-underline-offset: 3px;
  font-weight: 600;
}

.article-content a:hover {
  color: var(--signal-red);
}

.callout-box {
  border: 1px solid var(--border-heavy);
  background-color: var(--bg-subtle);
  padding: 24px;
  margin: 32px 0;
}

.callout-box-title {
  font-size: 0.875rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  margin-bottom: 8px;
  display: flex;
  align-items: center;
  gap: 8px;
}

.spec-table {
  width: 100%;
  border-collapse: collapse;
  margin: 32px 0;
  font-size: 0.9375rem;
}

.spec-table th, .spec-table td {
  border: 1px solid var(--border-light);
  padding: 14px 16px;
  text-align: left;
}

.spec-table th {
  background-color: var(--bg-subtle);
  font-weight: 700;
  font-size: 0.8125rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  border-bottom: 2px solid var(--border-heavy);
}

/* Articles Directory Grid */
.articles-feed-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 32px;
  margin: 48px 0 80px 0;
}

.article-card-item {
  border: 1px solid var(--border-light);
  padding: 36px 30px;
  background-color: var(--bg-pure);
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  transition: var(--transition);
}

.article-card-item:hover {
  border-color: var(--border-heavy);
  transform: translateY(-2px);
  box-shadow: 4px 4px 0px var(--border-heavy);
}

.card-kicker {
  font-size: 0.6875rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--text-dim);
  margin-bottom: 12px;
}

.card-title {
  font-size: 1.35rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  line-height: 1.3;
  margin-bottom: 16px;
}

.card-excerpt {
  font-size: 0.9rem;
  color: var(--text-muted);
  line-height: 1.6;
  margin-bottom: 24px;
}

.card-footer-meta {
  display: flex;
  align-items: center;
  justify-content: space-between;
  border-top: 1px solid var(--border-light);
  padding-top: 16px;
  font-size: 0.75rem;
  color: var(--text-dim);
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

/* Responsive Media Queries */
@media (max-width: 1024px) {
  .hero-subrow {
    grid-template-columns: 1fr;
    gap: 24px;
  }
  .features-grid, .pricing-grid, .reviews-grid {
    grid-template-columns: 1fr 1fr;
  }
  .article-body-layout {
    grid-template-columns: 1fr;
  }
  .article-sidebar {
    position: static;
    border-right: none;
    border-bottom: 1px solid var(--border-light);
    padding-bottom: 24px;
    margin-bottom: 32px;
  }
}

@media (max-width: 768px) {
  .nav-links {
    display: none;
  }
  .mobile-menu-btn {
    display: block;
  }
  .hero-metrics {
    grid-template-columns: 1fr;
    gap: 24px;
  }
  .metric-col {
    border-left: none;
    padding-left: 0;
    border-bottom: 1px solid var(--border-light);
    padding-bottom: 16px;
  }
  .metric-col:last-child {
    border-bottom: none;
  }
  .features-grid, .matrix-container, .pricing-grid, .faq-grid, .reviews-grid, .articles-feed-grid {
    grid-template-columns: 1fr;
  }
  .footer-top {
    flex-direction: column;
    align-items: flex-start;
    gap: 24px;
  }
  .footer-four-links {
    gap: 20px;
  }
  .footer-bottom {
    flex-direction: column;
    align-items: flex-start;
    gap: 12px;
  }
  .btn-swiss {
    width: 100%;
  }
  .index-left {
    gap: 16px;
    flex-direction: column;
  }
  .index-desc {
    margin-left: 0;
  }
}