/* ==========================================================================
   Astral Bob — Main Stylesheet
   Cosmic theme, clean typography, responsive layout, mystical aesthetic.
   ========================================================================== */

/* ---------- Variables ---------- */
:root {
  --color-bg:           #0c0a1a;
  --color-bg-alt:       #141127;
  --color-bg-card:      #1a1535;
  --color-primary:      #1e1b4b;
  --color-primary-dark: #0f0c2a;
  --color-accent:       #c084fc;
  --color-accent-hover: #a855f7;
  --color-gold:         #fbbf24;
  --color-text:         #e2e8f0;
  --color-text-muted:   #94a3b8;
  --color-border:       #2e2a5a;
  --container-width:    1200px;
  --container-padding:  1.25rem;
  --radius:             10px;
  --radius-lg:          16px;
  --shadow-sm:          0 1px 3px rgba(0,0,0,.3);
  --shadow-md:          0 4px 20px rgba(0,0,0,.4);
  --shadow-glow:        0 0 30px rgba(192,132,252,.15);
  --font:               system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  --font-display:       "Georgia", serif;
}

/* ---------- Reset ---------- */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  font-family: var(--font);
  color: var(--color-text);
  background: var(--color-bg);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
}
img { max-width: 100%; height: auto; display: block; }
a { color: var(--color-accent); text-decoration: none; transition: color 0.15s; }
a:hover { color: var(--color-gold); }

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

/* ---------- Site Header ---------- */
.site-header {
  background: linear-gradient(180deg, var(--color-primary-dark) 0%, var(--color-bg) 100%);
  border-bottom: 1px solid var(--color-border);
  padding: 1.5rem 0;
  text-align: center;
}
.site-header__brand {
  font-family: var(--font-display);
  font-size: clamp(1.8rem, 4vw, 2.8rem);
  font-weight: 700;
  color: #fff;
  letter-spacing: 0.08em;
  text-shadow: 0 0 40px rgba(192,132,252,.3);
}
.site-header__brand span {
  color: var(--color-accent);
}
.site-header__tagline {
  font-size: 0.9rem;
  color: var(--color-text-muted);
  margin-top: 0.35rem;
  letter-spacing: 0.15em;
  text-transform: uppercase;
}

/* ---------- Nav ---------- */
.site-nav {
  background: rgba(15,12,42,0.95);
  border-bottom: 1px solid var(--color-border);
  position: sticky;
  top: 0;
  z-index: 100;
  backdrop-filter: blur(12px);
}
.site-nav .container {
  display: flex;
  align-items: center;
  min-height: 52px;
}
.nav-links {
  display: flex;
  list-style: none;
  flex-wrap: wrap;
}
.nav-links a {
  display: block;
  padding: 0.7rem 0.95rem;
  color: rgba(255,255,255,0.75);
  text-decoration: none;
  font-size: 0.875rem;
  font-weight: 500;
  transition: color 0.15s, background 0.15s;
  white-space: nowrap;
  border-radius: 6px;
}
.nav-links a:hover,
.nav-links a.active {
  color: #fff;
  background: rgba(192,132,252,.15);
}
.hamburger {
  display: none;
  background: none;
  border: none;
  color: #fff;
  font-size: 1.5rem;
  cursor: pointer;
  padding: 0.5rem;
  margin-left: auto;
  line-height: 1;
}

/* ---------- Buttons ---------- */
.btn {
  display: inline-block;
  padding: 0.75rem 1.75rem;
  border-radius: var(--radius);
  font-weight: 600;
  text-decoration: none;
  font-size: 1rem;
  cursor: pointer;
  border: none;
  font-family: var(--font);
  transition: transform 0.15s, box-shadow 0.15s, background 0.15s, color 0.15s;
}
.btn:hover { transform: translateY(-2px); box-shadow: var(--shadow-md); }
.btn--primary {
  background: linear-gradient(135deg, var(--color-accent), var(--color-accent-hover));
  color: #fff;
}
.btn--primary:hover { background: linear-gradient(135deg, var(--color-accent-hover), #9333ea); color: #fff; }
.btn--outline {
  background: transparent;
  color: #fff;
  border: 2px solid rgba(255,255,255,0.3);
}
.btn--outline:hover { border-color: var(--color-accent); color: #fff; background: rgba(192,132,252,.1); }

/* ---------- Hero (Home) ---------- */
.hero {
  background: linear-gradient(160deg, var(--color-primary-dark) 0%, #1a1535 40%, #0c0a1a 100%);
  color: #fff;
  padding: 5rem var(--container-padding) 4.5rem;
  text-align: center;
  position: relative;
  overflow: hidden;
}
.hero::before {
  content: '';
  position: absolute;
  top: -50%;
  left: -50%;
  width: 200%;
  height: 200%;
  background: radial-gradient(ellipse at 30% 50%, rgba(192,132,252,.06) 0%, transparent 60%),
              radial-gradient(ellipse at 70% 50%, rgba(251,191,36,.04) 0%, transparent 60%);
  pointer-events: none;
}
.hero h1 {
  font-family: var(--font-display);
  font-size: clamp(2rem, 5vw, 3.5rem);
  font-weight: 700;
  margin-bottom: 1rem;
  letter-spacing: -0.01em;
  line-height: 1.15;
  position: relative;
}
.hero h1 span { color: var(--color-accent); }
.hero p {
  font-size: clamp(1rem, 2.2vw, 1.2rem);
  opacity: 0.8;
  max-width: 600px;
  margin: 0 auto 2rem;
  position: relative;
}
.hero-actions {
  display: flex;
  gap: 0.875rem;
  justify-content: center;
  flex-wrap: wrap;
  position: relative;
}

/* ---------- Page Hero (inner pages) ---------- */
.page-hero {
  background: linear-gradient(160deg, var(--color-primary-dark) 0%, #1a1535 40%, var(--color-bg) 100%);
  color: #fff;
  padding: 3.5rem var(--container-padding) 3rem;
  text-align: center;
  position: relative;
  overflow: hidden;
}
.page-hero::before {
  content: '';
  position: absolute;
  top: -50%;
  left: -50%;
  width: 200%;
  height: 200%;
  background: radial-gradient(ellipse at 30% 50%, rgba(192,132,252,.06) 0%, transparent 60%);
  pointer-events: none;
}
.page-hero h1 {
  font-family: var(--font-display);
  font-size: clamp(1.6rem, 3.5vw, 2.5rem);
  font-weight: 700;
  margin-bottom: 0.6rem;
  letter-spacing: -0.02em;
  position: relative;
}
.page-hero p {
  opacity: 0.75;
  max-width: 540px;
  margin: 0 auto;
  font-size: 1.05rem;
  position: relative;
}

/* ---------- Breadcrumb ---------- */
.breadcrumb-bar {
  background: var(--color-bg-alt);
  border-bottom: 1px solid var(--color-border);
}
.breadcrumb {
  font-size: 0.85rem;
  color: var(--color-text-muted);
  padding: 0.65rem 0;
}
.breadcrumb a { color: var(--color-text-muted); text-decoration: none; }
.breadcrumb a:hover { color: var(--color-accent); }
.breadcrumb__sep { margin: 0 0.35rem; }

/* ---------- Sections ---------- */
.section { padding: 3.5rem 0; }
.section--alt { background: var(--color-bg-alt); }
.section-title {
  font-family: var(--font-display);
  font-size: clamp(1.4rem, 3vw, 2rem);
  font-weight: 700;
  color: #fff;
  margin-bottom: 0.4rem;
  letter-spacing: -0.015em;
}
.section-lead {
  color: var(--color-text-muted);
  margin-bottom: 2rem;
  font-size: 1.05rem;
  max-width: 600px;
}

/* ---------- Card Grid ---------- */
.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: 1.25rem;
}
.card {
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 1.75rem 1.5rem;
  box-shadow: var(--shadow-sm);
  text-decoration: none;
  color: inherit;
  display: flex;
  flex-direction: column;
  transition: transform 0.2s, box-shadow 0.2s, border-color 0.2s;
}
.card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-glow);
  border-color: var(--color-accent);
  color: inherit;
}
.card__icon {
  font-size: 2.5rem;
  margin-bottom: 1rem;
  line-height: 1;
}
.card__title {
  font-size: 1.1rem;
  font-weight: 700;
  color: #fff;
  margin-bottom: 0.5rem;
}
.card__desc {
  font-size: 0.875rem;
  color: var(--color-text-muted);
  line-height: 1.6;
  flex: 1;
}
.card__meta {
  font-size: 0.78rem;
  color: rgba(148,163,184,.5);
  margin-top: 0.75rem;
}

/* ---------- Article/Post Content ---------- */
.post-content {
  max-width: 780px;
  margin-left: auto;
  margin-right: auto;
}
.post-content h2 {
  font-family: var(--font-display);
  font-size: 1.5rem;
  color: #fff;
  margin: 2.5rem 0 0.75rem;
  border-bottom: 1px solid var(--color-border);
  padding-bottom: 0.5rem;
}
.post-content h3 {
  font-family: var(--font-display);
  font-size: 1.2rem;
  color: var(--color-accent);
  margin: 2rem 0 0.5rem;
}
.post-content p {
  margin-bottom: 1.25rem;
  color: var(--color-text);
  line-height: 1.8;
}
.post-content ul,
.post-content ol {
  margin: 1rem 0 1.5rem 1.5rem;
  color: var(--color-text);
}
.post-content li { margin-bottom: 0.5rem; line-height: 1.7; }
.post-content blockquote {
  border-left: 3px solid var(--color-accent);
  margin: 1.5rem 0;
  padding: 1rem 1.5rem;
  background: var(--color-bg-card);
  border-radius: 0 var(--radius) var(--radius) 0;
  color: var(--color-text-muted);
  font-style: italic;
}
.post-content img {
  border-radius: var(--radius);
  margin: 1.5rem auto;
  box-shadow: var(--shadow-md);
}

/* ---------- Callout Box ---------- */
.callout {
  border-left: 4px solid var(--color-accent);
  background: var(--color-bg-card);
  border-radius: 0 var(--radius) var(--radius) 0;
  padding: 1.25rem 1.5rem;
  margin: 1.5rem 0;
  font-size: 0.95rem;
  line-height: 1.7;
  color: var(--color-text);
}
.callout strong { color: var(--color-accent); }
.callout--gold { border-color: var(--color-gold); }
.callout--gold strong { color: var(--color-gold); }

/* ---------- Steps List ---------- */
.steps-list {
  list-style: none;
  counter-reset: step;
  margin: 1.5rem 0;
}
.steps-list li {
  counter-increment: step;
  display: flex;
  gap: 1rem;
  margin-bottom: 1.25rem;
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 1.25rem 1.5rem;
  line-height: 1.65;
}
.steps-list li::before {
  content: counter(step);
  flex-shrink: 0;
  width: 32px;
  height: 32px;
  background: var(--color-accent);
  color: #fff;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 0.9rem;
}

/* ---------- Why List (homepage) ---------- */
.why-list {
  list-style: none;
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: 1rem;
}
.why-list li {
  display: flex;
  align-items: flex-start;
  gap: 0.75rem;
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 1rem 1.25rem;
  font-size: 0.95rem;
  line-height: 1.5;
}
.why-list li::before {
  content: "✦";
  font-weight: 800;
  color: var(--color-accent);
  font-size: 1rem;
  flex-shrink: 0;
  margin-top: 0.1rem;
}

/* ---------- Newsletter ---------- */
.newsletter {
  background: linear-gradient(160deg, var(--color-primary-dark) 0%, #1a1535 100%);
  color: #fff;
  text-align: center;
  padding: 3.5rem var(--container-padding);
  border-top: 1px solid var(--color-border);
  border-bottom: 1px solid var(--color-border);
}
.newsletter h2 {
  font-family: var(--font-display);
  font-size: clamp(1.3rem, 2.5vw, 1.7rem);
  font-weight: 700;
  margin-bottom: 0.5rem;
}
.newsletter p {
  opacity: 0.7;
  margin-bottom: 1.5rem;
  font-size: 1rem;
}
.newsletter-form {
  display: flex;
  gap: 0.5rem;
  justify-content: center;
  flex-wrap: wrap;
  max-width: 480px;
  margin: 0 auto;
}
.newsletter-form input[type="email"] {
  flex: 1;
  min-width: 210px;
  padding: 0.75rem 1rem;
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  font-size: 1rem;
  font-family: var(--font);
  background: var(--color-bg);
  color: var(--color-text);
}
.newsletter-form input[type="email"]:focus {
  outline: none;
  border-color: var(--color-accent);
  box-shadow: 0 0 0 3px rgba(192,132,252,.15);
}
.newsletter-form button {
  padding: 0.75rem 1.5rem;
  background: linear-gradient(135deg, var(--color-accent), var(--color-accent-hover));
  color: #fff;
  border: none;
  border-radius: var(--radius);
  font-weight: 700;
  font-size: 1rem;
  cursor: pointer;
  font-family: var(--font);
  transition: opacity 0.15s;
}
.newsletter-form button:hover { opacity: 0.9; }

/* ---------- Book Cards ---------- */
.book-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 1.5rem;
}
.book-card {
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 1.5rem;
  display: flex;
  flex-direction: column;
  transition: transform 0.2s, box-shadow 0.2s, border-color 0.2s;
}
.book-card:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-glow);
  border-color: var(--color-gold);
}
.book-card__title {
  font-size: 1.05rem;
  font-weight: 700;
  color: #fff;
  margin-bottom: 0.25rem;
}
.book-card__author {
  font-size: 0.85rem;
  color: var(--color-accent);
  margin-bottom: 0.75rem;
}
.book-card__desc {
  font-size: 0.9rem;
  color: var(--color-text-muted);
  line-height: 1.6;
  flex: 1;
  margin-bottom: 1rem;
}
.book-card__tag {
  display: inline-block;
  font-size: 0.7rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.07em;
  padding: 0.2rem 0.65rem;
  border-radius: 999px;
  background: rgba(192,132,252,.15);
  color: var(--color-accent);
  align-self: flex-start;
}

/* ---------- Footer ---------- */
.site-footer {
  background: var(--color-primary-dark);
  color: rgba(255,255,255,0.55);
  padding: 3.5rem 0 1.5rem;
  border-top: 1px solid var(--color-border);
}
.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 2rem;
  margin-bottom: 3rem;
}
.footer-brand__name {
  font-family: var(--font-display);
  font-size: 1.25rem;
  font-weight: 700;
  color: #fff;
  margin-bottom: 0.75rem;
}
.footer-brand p {
  font-size: 0.88rem;
  line-height: 1.65;
  max-width: 260px;
}
.footer-col h3 {
  color: #fff;
  font-size: 0.78rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  margin-bottom: 1rem;
}
.footer-col ul { list-style: none; display: flex; flex-direction: column; gap: 0.5rem; }
.footer-col a {
  color: rgba(255,255,255,0.5);
  text-decoration: none;
  font-size: 0.9rem;
  transition: color 0.15s;
}
.footer-col a:hover { color: var(--color-accent); }
.footer-bottom {
  border-top: 1px solid rgba(255,255,255,0.06);
  padding-top: 1.5rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 0.75rem;
  font-size: 0.83rem;
  color: rgba(255,255,255,0.35);
}
.footer-bottom-links { display: flex; gap: 1.25rem; }
.footer-bottom-links a {
  color: rgba(255,255,255,0.35);
  text-decoration: none;
  transition: color 0.15s;
}
.footer-bottom-links a:hover { color: var(--color-accent); }

/* ---------- Responsive ---------- */
@media (max-width: 960px) {
  .footer-grid { grid-template-columns: 1fr 1fr 1fr; }
  .footer-brand { grid-column: 1 / -1; }
  .footer-brand p { max-width: 100%; }
}

@media (max-width: 768px) {
  .hamburger { display: block; }
  .nav-links {
    display: none;
    flex-direction: column;
    width: 100%;
    border-top: 1px solid var(--color-border);
  }
  .nav-links.open { display: flex; }
  .site-nav .container { flex-wrap: wrap; padding-top: 0.25rem; padding-bottom: 0.25rem; }
  .footer-grid { grid-template-columns: 1fr 1fr; }
  .footer-brand { grid-column: 1 / -1; }
  .hero { padding: 3.5rem var(--container-padding) 3rem; }
  .section { padding: 2.5rem 0; }
}

@media (max-width: 480px) {
  .footer-grid { grid-template-columns: 1fr; }
  .footer-brand { grid-column: auto; }
  .hero h1 { font-size: 1.75rem; }
  .card-grid, .book-grid { grid-template-columns: 1fr; }
  .why-list { grid-template-columns: 1fr; }
}