/* ========================================
   Base & Layout Styles
   ======================================== */

/* Base */
* { box-sizing: border-box; }
html { transition: background 0.3s; }
body {
  margin: 0;
  padding: 0;
  font-family: Inter, system-ui, -apple-system, Segoe UI, Roboto, sans-serif;
  background: var(--bg);
  color: var(--ink);
  transition: background 0.3s, color 0.3s;
}
a { color: var(--accent); text-decoration: none; }
img { max-width: 100%; display: block; }
.container { width: min(1200px, 92%); margin-inline: auto; }
body.noscroll { overflow: hidden; }

/* Header */
header {
  position: sticky;
  top: 0;
  z-index: 100;
  backdrop-filter: saturate(160%) blur(8px);
  background: var(--header-bg);
  border-bottom: 1px solid var(--line);
  transition: background 0.3s;
}
.nav { display: flex; align-items: center; justify-content: space-between; padding: 14px 0; }
.brand { display: flex; align-items: center; gap: 12px; font-weight: 800; }
.brand-logo {
  width: 42px; height: 42px;
  border-radius: 10px;
  background: var(--logo-gradient);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  box-shadow: var(--shadow);
  padding: 4px;
}
.brand-logo .logo-p {
  font-size: 13px;
  font-weight: 900;
  color: var(--logo-stroke);
  line-height: 1;
  margin-bottom: -1px;
}
.brand-logo .logo-betoni {
  font-size: 7px;
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: 0.3px;
  color: var(--logo-stroke);
}
.brand-logo.small {
  width: 34px; height: 34px;
}
.brand-logo.small .logo-p {
  font-size: 11px;
}
.brand-logo.small .logo-betoni {
  font-size: 6px;
}
.nav ul { display: flex; gap: 22px; list-style: none; margin: 0; padding: 0; }
.nav a { color: var(--ink); opacity: 0.95; }
.nav a:hover { opacity: 1; }

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  background: var(--pri);
  color: #001a1d;
  border: none;
  padding: 14px 20px;
  border-radius: 12px;
  font-weight: 800;
  cursor: pointer;
  box-shadow: var(--shadow);
}
.btn:hover { background: var(--pri-2); }
.btn.outline { background: transparent; color: var(--ink); border: 1px solid var(--line); }

/* Theme Toggle */
.theme-toggle {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 42px; height: 42px;
  border-radius: 10px;
  border: 1px solid var(--line);
  background: transparent;
  cursor: pointer;
  transition: all 0.3s;
}
.theme-toggle:hover { background: var(--pri); border-color: var(--pri); }
.theme-toggle:hover svg { stroke: var(--bg); }
.theme-toggle svg { width: 20px; height: 20px; stroke: var(--ink); fill: none; }
.sun-icon { display: none; }
.moon-icon { display: block; }
[data-theme="light"] .sun-icon { display: block; }
[data-theme="light"] .moon-icon { display: none; }

/* Mobile Hamburger */
.hamburger {
  display: none;
  width: 42px; height: 42px;
  border-radius: 10px;
  border: 1px solid var(--line);
  background: transparent;
  align-items: center;
  justify-content: center;
  cursor: pointer;
}
.hamburger span {
  position: relative;
  display: block;
  width: 20px; height: 2px;
  background: var(--ink);
  border-radius: 2px;
}
.hamburger span::before,
.hamburger span::after {
  content: "";
  position: absolute;
  left: 0;
  width: 20px; height: 2px;
  background: var(--ink);
  border-radius: 2px;
  transition: all 0.3s;
}
.hamburger span::before { top: -6px; }
.hamburger span::after { top: 6px; }
.hamburger[aria-expanded="true"] span { background: transparent; }
.hamburger[aria-expanded="true"] span::before { transform: rotate(45deg); top: 0; }
.hamburger[aria-expanded="true"] span::after { transform: rotate(-45deg); top: 0; }

/* Mobile Drawer */
.scrim {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.5);
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.25s;
  z-index: 98;
  display: none;
}
.scrim.open { opacity: 1; pointer-events: auto; }
.mobile-drawer {
  position: fixed;
  top: 0; right: 0;
  height: 100vh;
  width: min(86vw, 340px);
  background: var(--drawer-bg);
  border-left: 1px solid var(--card-border);
  box-shadow: var(--shadow);
  transform: translateX(100%);
  transition: transform 0.25s;
  z-index: 99;
  display: none;
}
.mobile-drawer.open { transform: translateX(0); }
.mobile-drawer .menu { list-style: none; margin: 0; padding: 18px; display: grid; gap: 8px; }
.mobile-drawer .menu a {
  display: block;
  padding: 12px 10px;
  border-radius: 10px;
  background: var(--drawer-item);
  border: 1px solid var(--card-border);
  color: var(--ink);
}
.mobile-drawer .menu a:hover { background: var(--pri); color: #fff; }
.mobile-drawer .cta { padding: 0 18px 18px; }

/* Drawer structure for flex */
.mobile-drawer {
  display: none;
  flex-direction: column;
}
.mobile-drawer.open { display: flex; }

/* Responsive */
@media (max-width: 920px) {
  .nav ul, header .btn { display: none; }
  .hamburger { display: inline-flex; }
  .mobile-drawer, .scrim { display: block; }
}