:root {
  --mc-bg-page: #081225;
  --mc-surface: #0e1b34;
  --mc-surface-soft: #13223f;
  --mc-border: #223554;
  --mc-border-soft: #34507f;
  --mc-primary: #2f6df6;
  --mc-primary-hover: #1f5ae0;
  --mc-primary-soft: rgba(47, 109, 246, 0.14);
  --mc-text-main: #f8fbff;
  --mc-text-muted: #94a7c6;
  --mc-shadow-soft: 0 10px 25px rgba(0, 0, 0, 0.22);
  --mc-radius-md: 8px;
  --mc-radius-lg: 12px;
  --mc-radius-xl: 16px;
  --mc-input-bg: #1a2743;
  --mc-input-border: #2a3c5f;
  --mc-danger: #ef4444;
  --mc-success: #8fd19e;
  --mc-container: 1200px;
  --mc-header-height: 72px;
  --mc-font-main: "Manrope", sans-serif;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background: var(--mc-bg-page);
  color: var(--mc-text-main);
  font-family: var(--mc-font-main);
  line-height: 1.55;
  min-height: 100vh;
}

a {
  color: inherit;
  text-decoration: none;
}

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

.container {
  width: min(calc(100% - 40px), var(--mc-container));
  margin: 0 auto;
}

.section {
  padding: 55px 0 72px;
}

/* BUTTONS */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 48px;
  padding: 0 22px;
  border-radius: 999px;
  border: 1px solid transparent;
  font-size: 0.97rem;
  font-weight: 700;
  font-family: var(--mc-font-main);
  transition: transform 0.2s ease, background-color 0.2s ease, border-color 0.2s ease, box-shadow 0.2s ease;
  cursor: pointer;
  white-space: nowrap;
}

.btn:hover,
.btn:focus-visible {
  transform: translateY(-1px);
}

.btn-primary {
  background: var(--mc-primary);
  color: var(--mc-text-main);
  box-shadow: 0 8px 18px rgba(47, 109, 246, 0.18);
}

.btn-primary:hover,
.btn-primary:focus-visible {
  background: var(--mc-primary-hover);
}

/* SECTION KICKER */

.section-kicker {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 7px 12px;
  border-radius: 999px;
  background: var(--mc-primary-soft);
  border: 1px solid rgba(47, 109, 246, 0.16);
  color: #cbdcff;
  font-size: 0.83rem;
  font-weight: 700;
  letter-spacing: 0.02em;
}

/* ============================================
   GUIDE PAGE
============================================ */

.guide-page {
  padding-top: 26px;
}

/* HERO */

.guide-hero h1 {
  margin: 18px 0 16px;
  font-size: clamp(2.2rem, 4vw, 3.4rem);
  line-height: 1.0;
  letter-spacing: -0.04em;
}

.guide-intro {
  max-width: 62ch;
  color: var(--mc-text-muted);
  font-size: 1.06rem;
  margin: 0 0 28px;
}

/* ============================================
   STICKY INTERNAL NAV
============================================ */

.guide-nav-wrap {
  position: sticky;
  top: var(--mc-header-height);
  z-index: 90;
  background: rgba(8, 18, 37, 0.97);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--mc-border);
  padding: 10px 0;
}

.guide-nav {
  display: flex;
  flex-wrap: nowrap;
  gap: 8px;
  overflow-x: auto;
  scrollbar-width: none;
  -ms-overflow-style: none;
  padding-bottom: 2px;
}

.guide-nav::-webkit-scrollbar {
  display: none;
}

.guide-nav-link {
  display: inline-block;
  padding: 8px 18px;
  border-radius: 999px;
  border: 1px solid var(--mc-border-soft);
  background: var(--mc-surface-soft);
  color: var(--mc-text-muted);
  font-size: 0.88rem;
  font-weight: 600;
  white-space: nowrap;
  transition: background 0.2s ease, color 0.2s ease, border-color 0.2s ease;
}

.guide-nav-link:hover,
.guide-nav-link:focus-visible {
  color: var(--mc-text-main);
  border-color: var(--mc-primary);
  background: rgba(47, 109, 246, 0.1);
  outline: none;
}

.guide-nav-link.is-active {
  background: var(--mc-primary);
  border-color: var(--mc-primary);
  color: var(--mc-text-main);
  box-shadow: 0 3px 12px rgba(47, 109, 246, 0.28);
}

.guide-nav-select {
  display: none;
  width: 100%;
  padding: 10px 40px 10px 14px;
  border-radius: 10px;
  border: 1px solid var(--mc-input-border);
  background-color: var(--mc-input-bg);
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='16' height='16' viewBox='0 0 24 24' fill='%2394a7c6'%3E%3Cpath d='M7 10l5 5 5-5z'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 14px center;
  background-size: 16px;
  color: var(--mc-text-main);
  font-family: var(--mc-font-main);
  font-size: 0.95rem;
  font-weight: 600;
  -webkit-appearance: none;
  appearance: none;
  cursor: pointer;
}

.guide-nav-select:focus {
  outline: none;
  border-color: var(--mc-primary);
  box-shadow: 0 0 0 3px rgba(47, 109, 246, 0.18);
}

/* ============================================
   GUIDE SECTIONS
============================================ */

.guide-section {
  padding: 52px 0 64px;
  border-top: 1px solid var(--mc-border);
  scroll-margin-top: calc(var(--mc-header-height) + 68px);
}

.guide-section:nth-child(even) {
  background: rgba(14, 27, 52, 0.32);
}

.guide-section h2 {
  font-size: clamp(1.45rem, 2.4vw, 1.9rem);
  letter-spacing: -0.03em;
  line-height: 1.15;
  margin: 0 0 14px;
}

.guide-section-lead {
  max-width: 64ch;
  color: var(--mc-text-muted);
  font-size: 1.02rem;
  margin: 0 0 24px;
}

/* FORMULA BOX */

.formula-box {
  background: rgba(10, 20, 42, 0.9);
  border: 1px solid rgba(47, 109, 246, 0.22);
  border-left: 3px solid var(--mc-primary);
  border-radius: var(--mc-radius-md);
  padding: 16px 20px 14px;
  margin: 0 0 24px;
}

.formula-label {
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--mc-primary);
  margin-bottom: 8px;
}

.formula-expr {
  font-family: "Courier New", "Consolas", monospace;
  font-size: 1rem;
  color: #cbdcff;
  line-height: 1.5;
  margin-bottom: 10px;
}

.formula-vars {
  font-size: 0.85rem;
  color: var(--mc-text-muted);
  line-height: 1.6;
  border-top: 1px solid rgba(52, 80, 127, 0.3);
  padding-top: 8px;
}

.formula-vars span {
  display: inline-block;
  margin-right: 18px;
}

/* DATA TABLES */

.data-table-wrap {
  overflow-x: auto;
  margin: 0 0 28px;
  border-radius: var(--mc-radius-lg);
  border: 1px solid rgba(52, 80, 127, 0.34);
  box-shadow: var(--mc-shadow-soft);
}

.data-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.93rem;
}

.data-table th {
  background: rgba(47, 109, 246, 0.1);
  color: #cbdcff;
  font-weight: 700;
  font-size: 0.82rem;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  padding: 11px 16px;
  text-align: left;
  white-space: nowrap;
}

.data-table th:last-child {
  text-align: right;
}

.data-table td {
  padding: 9px 16px;
  border-top: 1px solid rgba(52, 80, 127, 0.18);
  color: var(--mc-text-main);
}

.data-table td:last-child {
  text-align: right;
  font-weight: 700;
  color: var(--mc-primary);
}

.data-table tr:hover td {
  background: rgba(47, 109, 246, 0.05);
}

.table-caption {
  font-size: 0.82rem;
  color: var(--mc-text-muted);
  margin: -20px 0 28px;
}

/* MINI FAQ */

.mini-faq {
  margin: 0 0 28px;
}

.mini-faq-header {
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--mc-text-muted);
  margin-bottom: 14px;
}

.mini-faq-item {
  padding: 14px 18px;
  border-radius: var(--mc-radius-md);
  background: rgba(14, 27, 52, 0.7);
  border: 1px solid rgba(52, 80, 127, 0.24);
  margin-bottom: 10px;
}

.mini-faq-q {
  font-weight: 700;
  font-size: 0.96rem;
  margin-bottom: 5px;
  color: var(--mc-text-main);
}

.mini-faq-a {
  color: var(--mc-text-muted);
  font-size: 0.93rem;
  line-height: 1.55;
  margin: 0;
}

.mini-faq-a strong {
  color: var(--mc-text-main);
}

/* INLINE CTA */

.inline-cta-wrap {
  margin-top: 4px;
}

.inline-cta {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 10px 22px;
  border-radius: 999px;
  background: var(--mc-primary-soft);
  border: 1px solid rgba(47, 109, 246, 0.28);
  color: #cbdcff;
  font-weight: 700;
  font-size: 0.95rem;
  transition: background 0.2s ease, color 0.2s ease, border-color 0.2s ease;
}

.inline-cta:hover,
.inline-cta:focus-visible {
  background: var(--mc-primary);
  border-color: var(--mc-primary);
  color: var(--mc-text-main);
  outline: none;
}

/* ============================================
   CTA PANEL
============================================ */

.section-cta {
  padding-top: 0;
  padding-bottom: 56px;
}

.cta-panel {
  padding: 48px 40px;
  text-align: center;
  border-radius: var(--mc-radius-xl);
  background: linear-gradient(180deg, rgba(19, 34, 63, 0.95), rgba(10, 20, 38, 0.98));
  border: 1px solid rgba(52, 80, 127, 0.34);
  box-shadow: var(--mc-shadow-soft);
}

.cta-panel .section-kicker {
  justify-content: center;
}

.cta-panel h2 {
  margin: 18px 0 14px;
  font-size: clamp(1.6rem, 3vw, 2.2rem);
  letter-spacing: -0.03em;
  line-height: 1.1;
}

.cta-panel p {
  color: var(--mc-text-muted);
  font-size: 1.06rem;
  margin: 0 auto 28px;
  max-width: 52ch;
}

/* ============================================
   RESPONSIVE
============================================ */

@media (max-width: 720px) {
  .section {
    padding: 20px 0 56px;
  }

  .container {
    width: min(calc(100% - 28px), var(--mc-container));
  }

  :root {
    --mc-header-height: 64px;
  }

  .guide-hero {
    padding-top: 32px;
    padding-bottom: 32px;
  }

  .guide-nav {
    display: none;
  }

  .guide-nav-select {
    display: block;
  }

  .guide-section {
    padding: 36px 0 48px;
    scroll-margin-top: calc(var(--mc-header-height) + 58px);
  }

  .formula-expr {
    font-size: 0.9rem;
  }

  .formula-vars span {
    display: block;
    margin-right: 0;
  }

  .data-table th,
  .data-table td {
    padding: 8px 12px;
    font-size: 0.88rem;
  }

  .cta-panel {
    padding: 32px 20px;
  }

  .btn {
    width: 100%;
    text-align: center;
  }

  .inline-cta {
    width: 100%;
    justify-content: center;
  }
}

@media (max-width: 480px) {
  .guide-nav-link {
    font-size: 0.83rem;
    padding: 7px 14px;
  }
}