/* ============================================================
   Late Night Chess — Main Stylesheet
   ============================================================ */

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

:root {
  --purple-deep:   #0d0a1a;
  --purple-dark:   #120d24;
  --purple-mid:    #1e1340;
  --purple-accent: #6b3fa0;
  --purple-bright: #9b59d0;
  --purple-glow:   #c084fc;
  --purple-light:  #e9d5ff;
  --gold:          #f5c842;
  --gold-dim:      #c9a227;
  --white:         #f0eaf8;
  --gray:          #a89bc2;
  --card-bg:       rgba(30, 19, 64, 0.75);
  --border:        rgba(155, 89, 208, 0.25);
}

html { scroll-behavior: smooth; }

body {
  font-family: 'Inter', sans-serif;
  background-color: var(--purple-deep);
  color: var(--white);
  min-height: 100vh;
  overflow-x: hidden;
}

/* ── Starfield background ── */
body::before {
  content: '';
  position: fixed;
  inset: 0;
  background-image:
    radial-gradient(1px 1px at 10% 20%, rgba(192,132,252,0.6) 0%, transparent 100%),
    radial-gradient(1px 1px at 30% 80%, rgba(192,132,252,0.4) 0%, transparent 100%),
    radial-gradient(1px 1px at 55% 15%, rgba(255,255,255,0.5) 0%, transparent 100%),
    radial-gradient(1px 1px at 75% 60%, rgba(192,132,252,0.5) 0%, transparent 100%),
    radial-gradient(1px 1px at 90% 35%, rgba(255,255,255,0.4) 0%, transparent 100%),
    radial-gradient(1px 1px at 20% 55%, rgba(245,200,66,0.3) 0%, transparent 100%),
    radial-gradient(1px 1px at 65% 90%, rgba(255,255,255,0.3) 0%, transparent 100%),
    radial-gradient(1px 1px at 45% 45%, rgba(192,132,252,0.3) 0%, transparent 100%);
  pointer-events: none;
  z-index: 0;
}

/* ============================================================
   NAVIGATION
   ============================================================ */
nav {
  position: sticky;
  top: 0;
  z-index: 100;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1rem 2.5rem;
  background: rgba(13, 10, 26, 0.85);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
}

.nav-logo {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  font-family: 'Cinzel', serif;
  font-size: 1.3rem;
  font-weight: 900;
  color: var(--purple-glow);
  text-decoration: none;
  letter-spacing: 0.04em;
}

.nav-logo img {
  height: 42px;
  width: auto;
  object-fit: contain;
  border-radius: 10px;
  box-shadow: 0 0 0 1px rgba(245, 200, 66, 0.35), 0 0 18px rgba(107, 63, 160, 0.5);
  transition: transform 0.3s, box-shadow 0.3s;
}

.nav-logo:hover img {
  transform: rotate(-4deg) scale(1.05);
  box-shadow: 0 0 0 1px rgba(245, 200, 66, 0.6), 0 0 26px rgba(155, 89, 208, 0.7);
}

.nav-links {
  display: flex;
  gap: 2rem;
  list-style: none;
}

.nav-links a {
  color: var(--gray);
  text-decoration: none;
  font-size: 0.9rem;
  font-weight: 500;
  letter-spacing: 0.03em;
  transition: color 0.25s;
}

.nav-links a:hover { color: var(--purple-glow); }

.nav-cta {
  background: linear-gradient(135deg, var(--purple-accent), var(--purple-bright));
  color: #fff !important;
  padding: 0.5rem 1.2rem;
  border-radius: 6px;
  font-weight: 600 !important;
  transition: opacity 0.25s !important;
}

.nav-cta:hover { opacity: 0.85; }

/* Hamburger (mobile) */
.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  cursor: pointer;
  background: none;
  border: none;
  padding: 4px;
}

.nav-toggle span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--purple-glow);
  border-radius: 2px;
  transition: transform 0.3s, opacity 0.3s;
}

.nav-toggle.open span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.nav-toggle.open span:nth-child(2) { opacity: 0; }
.nav-toggle.open span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* ============================================================
   HERO
   ============================================================ */
.hero {
  position: relative;
  z-index: 1;
  min-height: 92vh;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: 4rem 1.5rem;
}

.hero::after {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(ellipse 70% 60% at 50% 40%, rgba(107, 63, 160, 0.18) 0%, transparent 70%);
  pointer-events: none;
}

.hero-logo {
  position: relative;
  margin-bottom: 2rem;
  animation: logoFloat 5s ease-in-out infinite;
}

.hero-logo::after {
  content: '';
  position: absolute;
  inset: -22% -10%;
  border-radius: 50%;
  background: radial-gradient(ellipse at center, rgba(155, 89, 208, 0.45) 0%, transparent 70%);
  filter: blur(10px);
  z-index: -1;
}

.hero-logo img {
  width: clamp(180px, 32vw, 300px);
  height: auto;
  border-radius: 18px;
  box-shadow: 0 10px 50px rgba(107, 63, 160, 0.55), 0 0 0 1px rgba(245, 200, 66, 0.25);
}

@keyframes logoFloat {
  0%, 100% { transform: translateY(0); }
  50%      { transform: translateY(-10px); }
}

@media (prefers-reduced-motion: reduce) {
  .hero-logo { animation: none; }
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  background: rgba(155, 89, 208, 0.15);
  border: 1px solid var(--border);
  border-radius: 999px;
  padding: 0.35rem 1rem;
  font-size: 0.8rem;
  font-weight: 500;
  color: var(--purple-glow);
  letter-spacing: 0.06em;
  text-transform: uppercase;
  margin-bottom: 1.8rem;
}

.hero h1 {
  font-family: 'Cinzel', serif;
  font-size: clamp(2.8rem, 6vw, 5.5rem);
  font-weight: 900;
  line-height: 1.1;
  letter-spacing: -0.01em;
  background: linear-gradient(160deg, #fff 10%, var(--purple-glow) 60%, var(--gold) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  margin-bottom: 1.2rem;
}

.hero p {
  max-width: 620px;
  font-size: 1.1rem;
  color: var(--gray);
  line-height: 1.7;
  margin-bottom: 2.5rem;
}

.hero-btns {
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
  justify-content: center;
}

/* ============================================================
   BUTTONS
   ============================================================ */
.btn-primary {
  background: linear-gradient(135deg, var(--purple-accent), var(--purple-bright));
  color: #fff;
  padding: 0.8rem 2rem;
  border-radius: 8px;
  font-weight: 600;
  font-size: 0.95rem;
  text-decoration: none;
  box-shadow: 0 4px 24px rgba(107, 63, 160, 0.45);
  transition: transform 0.2s, box-shadow 0.2s;
  display: inline-block;
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 32px rgba(155, 89, 208, 0.55);
}

.btn-outline {
  background: transparent;
  color: var(--purple-glow);
  padding: 0.8rem 2rem;
  border-radius: 8px;
  border: 1px solid var(--border);
  font-weight: 600;
  font-size: 0.95rem;
  text-decoration: none;
  transition: background 0.2s, border-color 0.2s;
  display: inline-block;
}

.btn-outline:hover {
  background: rgba(155, 89, 208, 0.1);
  border-color: var(--purple-bright);
}

/* ============================================================
   CHESS BOARD PREVIEW
   ============================================================ */
.chess-board-preview {
  margin-top: 3.5rem;
  display: grid;
  grid-template-columns: repeat(8, 1fr);
  width: min(380px, 85vw);
  border-radius: 10px;
  overflow: hidden;
  box-shadow: 0 0 60px rgba(107, 63, 160, 0.4), 0 0 120px rgba(107, 63, 160, 0.15);
  border: 2px solid rgba(155, 89, 208, 0.4);
}

.chess-board-preview .cell {
  aspect-ratio: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: clamp(0.8rem, 2.5vw, 1.4rem);
}

.cell.light { background: rgba(155, 89, 208, 0.12); }
.cell.dark  { background: rgba(30, 19, 64, 0.9); }

/* ============================================================
   SECTIONS — SHARED
   ============================================================ */
section {
  position: relative;
  z-index: 1;
  padding: 5rem 1.5rem;
}

.section-label {
  text-align: center;
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--purple-glow);
  margin-bottom: 0.7rem;
}

.section-title {
  text-align: center;
  font-family: 'Cinzel', serif;
  font-size: clamp(1.7rem, 3.5vw, 2.8rem);
  font-weight: 700;
  color: var(--white);
  margin-bottom: 0.8rem;
}

.section-sub {
  text-align: center;
  color: var(--gray);
  font-size: 1rem;
  max-width: 540px;
  margin: 0 auto 3rem;
  line-height: 1.7;
}

.container {
  max-width: 1100px;
  margin: 0 auto;
}

/* ============================================================
   ABOUT
   ============================================================ */
.about-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 3rem;
  align-items: center;
}

.about-text h2 {
  font-family: 'Cinzel', serif;
  font-size: clamp(1.6rem, 3vw, 2.4rem);
  font-weight: 700;
  color: var(--white);
  margin-bottom: 1rem;
}

.about-text h2 span { color: var(--purple-glow); }

.about-text p {
  color: var(--gray);
  line-height: 1.8;
  margin-bottom: 1rem;
  font-size: 0.97rem;
}

.about-pills {
  display: flex;
  flex-wrap: wrap;
  gap: 0.6rem;
  margin-top: 1.5rem;
}

.pill {
  background: rgba(107, 63, 160, 0.18);
  border: 1px solid var(--border);
  border-radius: 999px;
  padding: 0.3rem 0.85rem;
  font-size: 0.8rem;
  color: var(--purple-light);
  font-weight: 500;
}

.about-visual {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1rem;
}

.stat-card {
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 1.4rem;
  text-align: center;
  backdrop-filter: blur(8px);
}

.stat-card .stat-icon { font-size: 1.8rem; margin-bottom: 0.5rem; }

.stat-card .stat-val {
  font-family: 'Cinzel', serif;
  font-size: 1.6rem;
  font-weight: 900;
  color: var(--purple-glow);
}

.stat-card .stat-lbl {
  font-size: 0.78rem;
  color: var(--gray);
  margin-top: 0.2rem;
}

/* ============================================================
   PRODUCTS
   ============================================================ */
.products-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 1.5rem;
}

.product-card {
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 2rem;
  backdrop-filter: blur(8px);
  transition: transform 0.25s, border-color 0.25s, box-shadow 0.25s;
  position: relative;
  overflow: hidden;
}

.product-card::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--purple-accent), var(--purple-glow));
  opacity: 0;
  transition: opacity 0.25s;
}

.product-card:hover {
  transform: translateY(-5px);
  border-color: rgba(155, 89, 208, 0.5);
  box-shadow: 0 12px 40px rgba(107, 63, 160, 0.25);
}

.product-card:hover::before { opacity: 1; }

.product-icon {
  width: 52px;
  height: 52px;
  background: linear-gradient(135deg, rgba(107, 63, 160, 0.3), rgba(155, 89, 208, 0.2));
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
  margin-bottom: 1.2rem;
  border: 1px solid var(--border);
}

.product-card h3 {
  font-family: 'Cinzel', serif;
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--white);
  margin-bottom: 0.6rem;
}

.product-card p {
  color: var(--gray);
  font-size: 0.88rem;
  line-height: 1.6;
  margin-bottom: 1.4rem;
}

.product-tag {
  display: inline-block;
  background: rgba(155, 89, 208, 0.15);
  border: 1px solid rgba(155, 89, 208, 0.3);
  color: var(--purple-glow);
  font-size: 0.72rem;
  font-weight: 600;
  letter-spacing: 0.05em;
  padding: 0.2rem 0.6rem;
  border-radius: 4px;
  text-transform: uppercase;
  margin-bottom: 0.5rem;
  width: fit-content;
}

/* ============================================================
   FEATURES
   ============================================================ */
.features-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 1.2rem;
}

.feature-item {
  display: flex;
  gap: 1rem;
  align-items: flex-start;
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 1.4rem;
  backdrop-filter: blur(6px);
  transition: border-color 0.2s;
}

.feature-item:hover { border-color: rgba(155, 89, 208, 0.45); }

.feature-icon {
  font-size: 1.4rem;
  flex-shrink: 0;
  margin-top: 0.1rem;
}

.feature-item h4 {
  font-size: 0.93rem;
  font-weight: 600;
  color: var(--white);
  margin-bottom: 0.3rem;
}

.feature-item p {
  font-size: 0.83rem;
  color: var(--gray);
  line-height: 1.55;
}

/* ============================================================
   DIVIDER
   ============================================================ */
.divider {
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--border), transparent);
  margin: 0 auto;
  max-width: 800px;
}

/* ============================================================
   CTA BANNER
   ============================================================ */
.cta-banner {
  background: linear-gradient(135deg, rgba(107, 63, 160, 0.25) 0%, rgba(30, 19, 64, 0.6) 100%);
  border: 1px solid var(--border);
  border-radius: 20px;
  padding: 3.5rem 2rem;
  text-align: center;
  backdrop-filter: blur(10px);
  max-width: 760px;
  margin: 0 auto;
}

.cta-banner h2 {
  font-family: 'Cinzel', serif;
  font-size: clamp(1.5rem, 3vw, 2.2rem);
  font-weight: 700;
  margin-bottom: 0.8rem;
}

.cta-banner h2 span { color: var(--purple-glow); }

.cta-banner p {
  color: var(--gray);
  margin-bottom: 2rem;
  font-size: 0.97rem;
  line-height: 1.7;
}

/* ============================================================
   FOOTER
   ============================================================ */
footer {
  position: relative;
  z-index: 1;
  border-top: 1px solid var(--border);
  padding: 3rem 2.5rem 2rem;
}

.footer-inner {
  max-width: 1100px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 2.5rem;
}

.footer-brand p {
  color: var(--gray);
  font-size: 0.85rem;
  line-height: 1.7;
  margin-top: 0.7rem;
  max-width: 260px;
}

.footer-col h5 {
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--purple-light);
  margin-bottom: 1rem;
}

.footer-col ul { list-style: none; }
.footer-col ul li { margin-bottom: 0.6rem; }
.footer-col ul li a {
  color: var(--gray);
  text-decoration: none;
  font-size: 0.85rem;
  transition: color 0.2s;
}

.footer-col ul li a:hover { color: var(--purple-glow); }

.footer-bottom {
  max-width: 1100px;
  margin: 2rem auto 0;
  padding-top: 1.5rem;
  border-top: 1px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 0.8rem;
  color: var(--gray);
  flex-wrap: wrap;
  gap: 0.5rem;
}

.footer-bottom .accent { color: var(--purple-glow); }

/* ============================================================
   SCROLL REVEAL
   ============================================================ */
.reveal {
  opacity: 0;
  transform: translateY(26px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

.reveal.revealed {
  opacity: 1;
  transform: translateY(0);
}

.active-link {
  color: var(--purple-glow) !important;
}

@media (prefers-reduced-motion: reduce) {
  .reveal { opacity: 1; transform: none; transition: none; }
}

/* ============================================================
   RESPONSIVE
   ============================================================ */
@media (max-width: 768px) {
  nav { padding: 1rem 1.2rem; }

  .nav-links {
    display: none;
    flex-direction: column;
    position: absolute;
    top: 100%;
    left: 0; right: 0;
    background: rgba(13, 10, 26, 0.97);
    padding: 1.2rem 1.5rem 1.5rem;
    gap: 1rem;
    border-bottom: 1px solid var(--border);
  }

  .nav-links.open { display: flex; }
  .nav-toggle { display: flex; }

  .about-grid { grid-template-columns: 1fr; }
  .about-visual { grid-template-columns: 1fr 1fr; }
  .footer-inner { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 480px) {
  .footer-inner { grid-template-columns: 1fr; }
}