/* ============================================
   XWING VENTURES — Global Styles
   Inspired by granite.asia — dark, minimal, premium
   ============================================ */

:root {
  --black:        #0a0a0a;
  --dark:         #111111;
  --surface:      #161616;
  --border:       #222222;
  --border-light: #2e2e2e;
  --accent:       #c8a96e;       /* warm gold */
  --accent-dim:   #9c7c45;
  --white:        #f5f5f0;
  --muted:        #888888;
  --muted-light:  #aaaaaa;
  --font-sans:    'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --font-serif:   'Georgia', 'Times New Roman', serif;
  --max-width:    1100px;
  --transition:   0.3s ease;
}

/* ---- Reset ---- */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; font-size: 16px; }
body {
  background-color: var(--black);
  color: var(--white);
  font-family: var(--font-sans);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}
a { color: inherit; text-decoration: none; }
img { display: block; max-width: 100%; }
ul { list-style: none; }

/* ---- Typography ---- */
h1, h2, h3, h4 { font-weight: 300; letter-spacing: -0.02em; line-height: 1.15; }
h1 { font-size: clamp(2.4rem, 5vw, 4.2rem); }
h2 { font-size: clamp(1.8rem, 3vw, 2.8rem); }
h3 { font-size: clamp(1.2rem, 2vw, 1.6rem); }
p  { color: var(--muted-light); font-size: 1rem; line-height: 1.75; }

/* ---- Layout ---- */
.container { max-width: var(--max-width); margin: 0 auto; padding: 0 40px; }

/* ---- NAV ---- */
nav {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 100;
  height: 68px;
  display: flex;
  align-items: center;
  padding: 0 40px;
  border-bottom: 1px solid transparent;
  transition: background var(--transition), border-color var(--transition);
}
nav.scrolled {
  background: rgba(10,10,10,0.95);
  backdrop-filter: blur(12px);
  border-bottom-color: var(--border);
}
.nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
  max-width: var(--max-width);
  margin: 0 auto;
}
.nav-logo {
  font-size: 1.05rem;
  font-weight: 500;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--white);
}
.nav-logo span { color: var(--accent); }
.nav-links {
  display: flex;
  gap: 36px;
  align-items: center;
}
.nav-links a {
  font-size: 0.78rem;
  font-weight: 400;
  letter-spacing: 0.10em;
  text-transform: uppercase;
  color: var(--muted);
  transition: color var(--transition);
  position: relative;
  padding-bottom: 2px;
}
.nav-links a::after {
  content: '';
  position: absolute;
  bottom: -2px; left: 0;
  width: 0; height: 1px;
  background: var(--accent);
  transition: width var(--transition);
}
.nav-links a:hover,
.nav-links a.active { color: var(--white); }
.nav-links a:hover::after,
.nav-links a.active::after { width: 100%; }

/* ---- HERO ---- */
.hero {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  justify-content: center;
  padding: 120px 40px 80px;
  position: relative;
  overflow: hidden;
}
.hero::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0; bottom: 0;
  background:
    radial-gradient(ellipse 60% 50% at 70% 40%, rgba(200,169,110,0.05) 0%, transparent 70%),
    radial-gradient(ellipse 40% 60% at 20% 80%, rgba(200,169,110,0.03) 0%, transparent 60%);
  pointer-events: none;
}
.hero-inner {
  max-width: var(--max-width);
  margin: 0 auto;
  width: 100%;
}
.hero-label {
  font-size: 0.72rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 28px;
  display: flex;
  align-items: center;
  gap: 12px;
}
.hero-label::before {
  content: '';
  display: block;
  width: 32px;
  height: 1px;
  background: var(--accent);
}
.hero h1 { margin-bottom: 28px; color: var(--white); }
.hero h1 em { font-style: normal; color: var(--accent); }
.hero-sub {
  font-size: 1.05rem;
  color: var(--muted);
  max-width: 540px;
  line-height: 1.75;
  margin-bottom: 52px;
}
.hero-cta {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
}

/* ---- BUTTONS ---- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 13px 28px;
  font-size: 0.78rem;
  font-weight: 500;
  letter-spacing: 0.10em;
  text-transform: uppercase;
  border: 1px solid transparent;
  cursor: pointer;
  transition: all var(--transition);
}
.btn-primary {
  background: var(--accent);
  color: var(--black);
  border-color: var(--accent);
}
.btn-primary:hover {
  background: var(--accent-dim);
  border-color: var(--accent-dim);
}
.btn-outline {
  background: transparent;
  color: var(--white);
  border-color: var(--border-light);
}
.btn-outline:hover {
  border-color: var(--accent);
  color: var(--accent);
}

/* ---- DIVIDER / SECTION ---- */
.section { padding: 100px 40px; }
.section-alt { background: var(--surface); }

.section-label {
  font-size: 0.68rem;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 20px;
}
.section-title { margin-bottom: 20px; }
.section-body { max-width: 560px; color: var(--muted-light); }

.rule {
  border: none;
  border-top: 1px solid var(--border);
  margin: 0;
}

/* ---- GRID CARDS ---- */
.grid-3 {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 1px;
  background: var(--border);
  margin-top: 60px;
}
.card {
  background: var(--black);
  padding: 44px 36px;
  transition: background var(--transition);
}
.card:hover { background: var(--surface); }
.card-number {
  font-size: 0.68rem;
  letter-spacing: 0.2em;
  color: var(--accent);
  margin-bottom: 24px;
  display: block;
}
.card h3 { margin-bottom: 16px; font-weight: 400; }
.card p { font-size: 0.93rem; color: var(--muted); }

/* ---- STAT ROW ---- */
.stat-row {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 1px;
  background: var(--border);
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
  margin-top: 80px;
}
.stat-item {
  background: var(--black);
  padding: 36px 32px;
}
.stat-value {
  font-size: 2.4rem;
  font-weight: 200;
  letter-spacing: -0.03em;
  color: var(--white);
  display: block;
  margin-bottom: 6px;
}
.stat-label {
  font-size: 0.72rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--muted);
}

/* ---- TECH TILES ---- */
.tech-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 1px;
  background: var(--border);
  margin-top: 60px;
}
.tech-tile {
  background: var(--black);
  padding: 48px 40px;
}
.tech-tile:hover { background: var(--surface); }
.tech-icon {
  width: 40px;
  height: 40px;
  margin-bottom: 28px;
  color: var(--accent);
}
.tech-tile h3 { margin-bottom: 14px; font-weight: 400; }
.tech-tile p { font-size: 0.9rem; color: var(--muted); line-height: 1.7; }

/* ---- FORM ---- */
.form-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
  margin-top: 52px;
}
.form-group {
  display: flex;
  flex-direction: column;
  gap: 8px;
}
.form-group.full { grid-column: 1 / -1; }
.form-group label {
  font-size: 0.72rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--muted);
}
.form-group input,
.form-group select,
.form-group textarea {
  background: var(--surface);
  border: 1px solid var(--border-light);
  color: var(--white);
  font-family: var(--font-sans);
  font-size: 0.95rem;
  padding: 13px 16px;
  outline: none;
  transition: border-color var(--transition);
  appearance: none;
  -webkit-appearance: none;
}
.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
  border-color: var(--accent);
}
.form-group textarea { resize: vertical; min-height: 120px; }
.form-group select { cursor: pointer; }
.form-group input::placeholder,
.form-group textarea::placeholder { color: var(--muted); }

.form-submit {
  grid-column: 1 / -1;
  margin-top: 8px;
}
.form-note {
  font-size: 0.78rem;
  color: var(--muted);
  margin-top: 12px;
  text-align: center;
}

/* ---- FOOTER ---- */
footer {
  border-top: 1px solid var(--border);
  padding: 48px 40px;
}
.footer-inner {
  max-width: var(--max-width);
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 20px;
}
.footer-logo {
  font-size: 0.85rem;
  font-weight: 500;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}
.footer-logo span { color: var(--accent); }
.footer-copy {
  font-size: 0.72rem;
  color: var(--muted);
  letter-spacing: 0.05em;
}
.footer-links {
  display: flex;
  gap: 28px;
}
.footer-links a {
  font-size: 0.72rem;
  letter-spacing: 0.10em;
  text-transform: uppercase;
  color: var(--muted);
  transition: color var(--transition);
}
.footer-links a:hover { color: var(--accent); }
footer nav {
  position: static;
  top: auto;
  left: auto;
  right: auto;
  height: auto;
  z-index: auto;
  border-bottom: none;
  background: none;
  padding: 0;
}

/* ---- PAGE HERO (inner pages) ---- */
.page-hero {
  padding: 160px 40px 80px;
  border-bottom: 1px solid var(--border);
}
.page-hero-inner {
  max-width: var(--max-width);
  margin: 0 auto;
}

/* ---- PROBLEM ITEMS ---- */
.problem-list {
  margin-top: 70px;
  border-top: 1px solid var(--border);
}
.problem-item {
  display: grid;
  grid-template-columns: 80px 1fr;
  gap: 40px;
  padding: 52px 0;
  border-bottom: 1px solid var(--border);
  align-items: start;
}
.problem-num {
  font-size: 3rem;
  font-weight: 200;
  color: var(--border-light);
  letter-spacing: -0.04em;
  line-height: 1;
  padding-top: 6px;
}
.problem-content h3 {
  font-size: 1.35rem;
  font-weight: 400;
  margin-bottom: 14px;
}
.problem-content p { font-size: 0.95rem; color: var(--muted); max-width: 680px; }
.problem-tag {
  display: inline-block;
  margin-top: 18px;
  font-size: 0.68rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--accent);
  border: 1px solid var(--accent-dim);
  padding: 5px 12px;
}

/* ---- SOLUTION approach ---- */
.approach-block {
  margin-top: 80px;
  padding-top: 60px;
  border-top: 1px solid var(--border);
}
.approach-block h2 { margin-bottom: 20px; }
.approach-block p { max-width: 600px; color: var(--muted-light); }

.approach-steps {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 1px;
  background: var(--border);
  margin-top: 48px;
}
.approach-step {
  background: var(--black);
  padding: 36px 32px;
}
.approach-step-num {
  font-size: 0.68rem;
  letter-spacing: 0.2em;
  color: var(--accent);
  margin-bottom: 16px;
  display: block;
}
.approach-step h4 {
  font-size: 1rem;
  font-weight: 400;
  margin-bottom: 10px;
}
.approach-step p { font-size: 0.85rem; color: var(--muted); }

/* ---- Hamburger (mobile) ---- */
.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  cursor: pointer;
  padding: 4px;
}
.nav-toggle span {
  display: block;
  width: 22px;
  height: 1px;
  background: var(--white);
  transition: all var(--transition);
}

/* ---- RESPONSIVE ---- */
@media (max-width: 768px) {
  .container, nav, .hero, .section, footer, .page-hero { padding-left: 24px; padding-right: 24px; }
  .nav-links { display: none; position: absolute; top: 68px; left: 0; right: 0; background: var(--dark); flex-direction: column; gap: 0; padding: 16px 0; border-bottom: 1px solid var(--border); }
  .nav-links.open { display: flex; }
  .nav-links a { padding: 14px 24px; font-size: 0.82rem; }
  .nav-toggle { display: flex; }
  .form-grid { grid-template-columns: 1fr; }
  .problem-item { grid-template-columns: 1fr; gap: 12px; }
  .problem-num { font-size: 2rem; }
  .stat-row { grid-template-columns: 1fr 1fr; }
  .footer-inner { flex-direction: column; text-align: center; }
  .footer-links { justify-content: center; }
}