/* ==================================================================
   Starter Kit Styles
   Save as: starter-kit-styles.css
   ================================================================== */

:root {
  --bg: #050608;
  --bg-alt: #0b0e11;
  --card: #0f1318;
  --card-soft: #111720;
  --line: rgba(148, 163, 184, 0.25);
  --mute: #9ca3af;
  --text: #f9fafb;
  --ops-orange: #cc5500;
  --ops-orange-soft: rgba(204, 85, 0, 0.14);
  --chip-bg: #111827;
  --chip-border: rgba(148, 163, 184, 0.4);
  --chip-active-bg: #cc5500;
  --chip-active-text: #fff;
  --chip-text: #e5e7eb;
  --shadow-soft: 0 18px 45px rgba(0, 0, 0, 0.85);
}

/* 1. BASE RESET */

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

html,
body {
  margin: 0;
  padding: 0;
}

body {
  font-family: system-ui, -apple-system, BlinkMacSystemFont, "Inter", sans-serif;
  background: radial-gradient(circle at top left, #111827 0, #050608 40%, #020309 100%);
  color: var(--text);
  -webkit-font-smoothing: antialiased;
}

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

a {
  color: inherit;
}

button {
  font-family: inherit;
}

/* 2. LAYOUT WRAPPER */

.wrap {
  max-width: 1120px;
  margin: 0 auto;
  padding: 0 24px 80px;
}

/* 3. HEADER & NAV */

header {
  position: sticky;
  top: 0;
  z-index: 1000;
  background: rgba(5, 6, 8, 0.96);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--line);
}

.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 64px;
  max-width: 1120px;
  margin: 0 auto;
  padding: 0 24px;
}

.logo a {
  display: flex;
  align-items: center;
  gap: 12px;
  color: #fff;
  text-decoration: none;
}

.logo img {
  height: 32px;
  width: auto;
  display: block;
}

.logo strong {
  font-weight: 800;
  color: #fff;
  font-size: 1.1rem;
  letter-spacing: -0.02em;
}

/* Hidden by default; only shown on mobile */
.mobile-nav-intro {
  display: none;
}

/* Desktop Nav Links */

.main-nav {
  display: flex;
  gap: 8px;
  align-items: center;
}

.nav-link {
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--mute);
  padding: 8px 12px;
  border-radius: 6px;
  text-decoration: none;
}

.nav-link:hover {
  color: #fff;
  background: rgba(255, 255, 255, 0.05);
  text-decoration: none;
}

.nav-link.active {
  color: #fff;
}

.nav-link.primary {
  background: var(--ops-orange);
  color: #fff;
  font-weight: 600;
  padding: 8px 16px;
  border-radius: 999px;
}

.nav-link.primary:hover {
  background: #e06000;
  text-decoration: none;
}

.ops-deck-link {
  color: var(--ops-orange);
  font-weight: 700;
  position: relative;
}

.ops-deck-link::after {
  content: "NEW";
  position: absolute;
  top: -8px;
  right: -18px;
  font-size: 0.65rem;
  background: #f97316;
  color: #000;
  padding: 2px 4px;
  border-radius: 3px;
  line-height: 1;
}

/* 4. HERO SECTION */

.hero {
  display: grid;
  grid-template-columns: 1.2fr 0.8fr;
  gap: 40px;
  align-items: center;
  padding: 60px 0;
  border-bottom: 1px solid var(--line);
}

.hero h1 {
  font-size: 2.5rem;
  line-height: 1.1;
  margin: 0 0 16px;
  color: #fff;
  letter-spacing: -0.02em;
}

.hero p {
  font-size: 1.1rem;
  color: var(--mute);
  margin: 0 0 24px;
  max-width: 600px;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  align-items: center;
  margin-bottom: 18px;
}

.btn-primary {
  background: var(--ops-orange);
  color: #fff;
  border-radius: 999px;
  padding: 10px 18px;
  font-weight: 600;
  font-size: 0.98rem;
  border: none;
  cursor: pointer;
  text-decoration: none;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  box-shadow: 0 12px 30px rgba(204, 85, 0, 0.55);
}

.btn-primary:hover {
  background: #e06000;
}

.btn-ghost {
  background: transparent;
  border-radius: 999px;
  padding: 9px 16px;
  font-size: 0.95rem;
  border: 1px solid rgba(148, 163, 184, 0.5);
  color: var(--mute);
  display: inline-flex;
  align-items: center;
  gap: 8px;
  cursor: pointer;
  text-decoration: none;
}

.btn-ghost:hover {
  background: rgba(15, 23, 42, 0.9);
  color: #e5e7eb;
}

.hero-meta {
  font-size: 0.85rem;
  color: var(--mute);
}

.hero-meta strong {
  color: #e5e7eb;
}

/* Right side book card */

.bookCard {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 16px;
  padding: 24px;
  display: flex;
  gap: 24px;
  align-items: center;
  box-shadow: var(--shadow-soft);
}

.bookCard img {
  width: 140px;
  border-radius: 8px;
  box-shadow: 0 18px 45px rgba(0, 0, 0, 0.9);
}

.bookCard h2 {
  margin: 0 0 8px;
  font-size: 1.1rem;
  color: #f9fafb;
}

.bookCard p {
  margin: 0 0 12px;
  color: var(--mute);
  font-size: 0.9rem;
}

.book-meta {
  font-size: 0.8rem;
  color: var(--mute);
}

.book-meta strong {
  color: #e5e7eb;
}

/* 5. FILTER CHIPS */

.filters {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 24px 0 20px;
}

.chip {
  border-radius: 999px;
  border: 1px solid var(--chip-border);
  padding: 6px 12px;
  font-size: 0.85rem;
  background: var(--chip-bg);
  color: var(--chip-text);
  cursor: pointer;
  transition: background 0.15s ease, color 0.15s ease, box-shadow 0.15s ease;
}

.chip:hover {
  background: #1f2937;
}

.chip[data-active="true"] {
  background: var(--chip-active-bg);
  color: var(--chip-active-text);
  border-color: transparent;
  box-shadow: 0 10px 30px rgba(204, 85, 0, 0.55);
}

/* 6. TOOL GRID CARDS */

.grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 20px;
}

.card {
  background: var(--card-soft);
  border-radius: 16px;
  border: 1px solid var(--line);
  padding: 18px 16px 16px;
  display: flex;
  flex-direction: column;
  gap: 10px;
  box-shadow: 0 18px 40px rgba(0, 0, 0, 0.85);
}

.card-header {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: 8px;
}

.card h3 {
  margin: 0;
  font-size: 1rem;
  color: #f9fafb;
}

.card-step {
  font-size: 0.75rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--ops-orange);
}

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

.tag-row {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-top: 8px;
}

.tag {
  font-size: 0.72rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  padding: 3px 8px;
  border-radius: 999px;
  border: 1px solid rgba(148, 163, 184, 0.4);
  color: #e5e7eb;
}

/* Download link */

.card-footer {
  margin-top: 12px;
  display: flex;
  justify-content: flex-start;
}

.card-footer a {
  font-size: 0.85rem;
  color: #fef3c7;
  text-decoration: none;
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

.card-footer a:hover {
  text-decoration: underline;
}

/* 7. MOBILE RESPONSIVE */

.menu-toggle {
  display: none;
}

@media (max-width: 900px) {
  .hero {
    grid-template-columns: 1fr;
    text-align: center;
    gap: 30px;
  }

  .hero p {
    margin-left: auto;
    margin-right: auto;
  }

  .bookCard {
    flex-direction: column;
    text-align: center;
    max-width: 300px;
    margin: 0 auto;
  }

  .mobile-nav-intro {
    display: block;
    text-align: center;
    font-size: 0.8rem;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    color: var(--ops-orange);
    font-weight: 600;
    padding: 10px 16px 12px;
    margin: 0 0 16px;
    background: rgba(204, 85, 0, 0.16);
    border-radius: 999px;
  }

  .menu-toggle {
    display: flex;
    flex-direction: column;
    justify-content: center;
    gap: 5px;
    padding: 9px 10px;
    border-radius: 999px;
    border: 1px solid rgba(148, 163, 184, 0.6);
    background: rgba(15, 23, 42, 0.95);
    cursor: pointer;
    z-index: 2100;
  }

  .menu-toggle span {
    width: 24px;
    height: 2px;
    background: #fff;
    transition: 0.3s;
    pointer-events: none;
  }

  .menu-toggle.is-active {
    background: var(--ops-orange);
    border-color: var(--ops-orange);
  }

  .menu-toggle.is-active span {
    background: #050608;
  }

  .menu-toggle.is-active span:nth-child(1) {
    transform: translateY(7px) rotate(45deg);
  }

  .menu-toggle.is-active span:nth-child(2) {
    opacity: 0;
  }

  .menu-toggle.is-active span:nth-child(3) {
    transform: translateY(-7px) rotate(-45deg);
  }

  /* Mobile nav overlay */

  .main-nav {
    display: none;
    position: fixed;
    inset: 0;
    min-height: 100vh;
    background: #050608;
    flex-direction: column;
    align-items: stretch;
    /* Top padding leaves room for the header plus air for the intro text */
    padding: 80px 24px 40px;
    z-index: 2000;
    overflow-y: auto;
    -webkit-overflow-scrolling: touch;
    border-top: 1px solid var(--line);
    box-shadow: 0 18px 40px rgba(0, 0, 0, 0.85);
  }

  .main-nav.is-open {
    display: flex;
    animation: navSlideDown 0.2s ease-out;
  }

  @keyframes navSlideDown {
    from {
      transform: translateY(-6px);
      opacity: 0;
    }
    to {
      transform: translateY(0);
      opacity: 1;
    }
  }

  .main-nav .nav-link {
    width: 100%;
    text-align: center;
    font-size: 1.25rem;
    padding: 20px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.05);
    border-radius: 0;
  }

  .main-nav .nav-link:last-of-type {
    margin-bottom: 24px;
  }

  .nav-link.primary {
    margin-top: 24px;
    width: auto;
    display: inline-block;
    align-self: center;
  }

  .filters {
    justify-content: center;
  }

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

  .wrap {
    padding: 0 16px 64px;
  }

  .topbar {
    padding: 0 16px;
  }

  .footer-content {
    flex-direction: column;
    text-align: center;
    align-items: center;
  }

  .footer-links {
    gap: 20px;
    justify-content: center;
  }

  .footer-links a {
    margin: 0;
  }
}

/* 8. FOOTER */

footer {
  border-top: 1px solid var(--line);
  padding: 24px 0 32px;
  background: radial-gradient(circle at top, #020617 0, #020309 60%, #000 100%);
}

.footer-content {
  max-width: 1120px;
  margin: 0 auto;
  padding: 0 24px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 12px;
  color: var(--mute);
  font-size: 0.85rem;
}

.footer-links {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
}

.footer-links a {
  color: var(--mute);
  text-decoration: none;
}

.footer-links a:hover {
  color: #e5e7eb;
}

.holiday-footer-msg {
  text-align: center;
  margin-top: 16px;
  font-size: 0.9rem;
  color: #e5e7eb;
}

/* Trademark note in footer */

.tm-note {
  font-size: 0.7rem;
  color: #6b7280;
}