/* ============================================================
   base.css — Reset, Nav, Buttons, Section commons, Animations
   Хоёр хуудсанд хамаарах суурь стиль
   ============================================================ */

/* ── Reset ── */
* { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  font-family: var(--font-body);
  font-weight: var(--weight-regular);
  background: var(--color-bg);
  color: var(--color-text);
  overflow-x: hidden;
}

/* ── Cursor ── */
* { cursor: default; }
a, button,
.act-card, .act-dot,
.age-card, .gallery-item,
.btn-primary, .btn-outline,
.prog-tab, .prog-btn,
nav ul li a, .footer-links a { cursor: pointer; }

.age-card, .act-card,
.btn-primary, .btn-outline,
nav a, .gallery-item {
  -webkit-user-select: none;
  -moz-user-select: none;
  user-select: none;
}

/* ============================================================
   NAV
   ============================================================ */
nav {
  position: fixed; top: 0; width: 100%; z-index: var(--z-nav);
  height: var(--nav-height);
  background: var(--color-primary);
  border-bottom: 3px solid var(--color-accent);
  transition:
    background var(--transition-base),
    border-color var(--transition-base),
    box-shadow var(--transition-base);
}
nav.nav-scrolled {
  background: #ffffff;
  border-bottom: 3px solid var(--color-primary);
  box-shadow: 0 2px 20px rgba(17,46,80,0.12);
}
nav .nav-inner {
  max-width: var(--container-max); margin: 0 auto;
  display: flex; align-items: center; justify-content: space-between;
  padding: 0 var(--space-8); height: 100%;
}

/* Logo */
.nav-logo { display: flex; align-items: center; gap: var(--space-3); text-decoration: none; }
.nav-logo .logo-white { display: block; }
.nav-logo .logo-color  { display: none; }
nav.nav-scrolled .nav-logo .logo-white { display: none; }
nav.nav-scrolled .nav-logo .logo-color  { display: block; }
.nav-logo img { height: 44px; width: auto; }

/* Links */
nav ul { list-style: none; display: flex; gap: var(--space-8); }
nav ul li a {
  color: rgba(255,255,255,0.9);
  text-decoration: none;
  font-family: var(--font-display);
  font-size: var(--text-xs);
  font-weight: var(--weight-semibold);
  letter-spacing: var(--tracking-wider);
  text-transform: uppercase;
  transition: color var(--transition-fast);
  position: relative;
}
nav ul li a::after {
  content: ''; position: absolute; bottom: -4px; left: 0;
  width: 0; height: 2px; background: var(--color-accent);
  transition: width var(--transition-base);
}
nav ul li a:hover         { color: var(--color-accent); }
nav ul li a:hover::after  { width: 100%; }
nav.nav-scrolled ul li a  { color: var(--color-primary); }
nav.nav-scrolled ul li a:hover { color: var(--color-accent); }

/* Active link — program.html дээр Programs-г тодруулна */
.nav-link--active { color: var(--color-accent) !important; }

/* ============================================================
   BUTTONS
   ============================================================ */
.btn-primary {
  display: inline-flex; align-items: center; justify-content: center;
  padding: var(--space-4) var(--space-10);
  background: var(--color-accent);
  color: var(--color-dark-blue);
  font-family: var(--font-display);
  font-size: var(--text-xs); font-weight: var(--weight-bold);
  letter-spacing: var(--tracking-wider); text-transform: uppercase;
  text-decoration: none; border: none; border-radius: 0;
  transition:
    background var(--transition-base),
    transform var(--transition-fast),
    color var(--transition-base);
}
.btn-primary:hover { background: var(--color-primary); color: #fff; transform: translateY(-2px); }
.btn-primary--full { width: 100%; padding: 16px var(--space-10); }

.btn-outline {
  display: inline-flex; align-items: center; justify-content: center;
  padding: var(--space-4) var(--space-10);
  border: 1.5px solid rgba(255,255,255,0.6);
  color: var(--color-text-on-dark);
  font-family: var(--font-display); font-size: var(--text-xs); font-weight: var(--weight-bold);
  letter-spacing: var(--tracking-wider); text-transform: uppercase;
  text-decoration: none; border-radius: 0;
  transition: border-color var(--transition-base), background var(--transition-base);
}
.btn-outline:hover { border-color: var(--color-accent); background: rgba(29,67,130,0.2); }

/* ============================================================
   SECTION COMMONS
   ============================================================ */
section { padding: var(--space-section) var(--space-5); }
.container { max-width: var(--container-max); margin: 0 auto; }

.section-label {
  font-family: var(--font-display);
  font-size: var(--text-xs); font-weight: var(--weight-semibold);
  letter-spacing: var(--tracking-widest); text-transform: uppercase;
  color: var(--color-primary);
  display: flex; align-items: center; gap: var(--space-3);
  margin-bottom: var(--space-5);
  transition: color var(--transition-base);
}
.section-label::after { content: ''; flex: 1; max-width: 80px; height: 1px; background: currentColor; }
.section-label--center { justify-content: center; }

.section-title {
  font-family: var(--font-display);
  font-size: var(--text-section-title);
  font-weight: var(--weight-bold);
  line-height: var(--leading-snug);
  color: var(--color-surface-dark);
  margin-bottom: var(--space-10);
  transition: color var(--transition-base);
}
.section-title em  { color: var(--color-primary); font-style: normal; }
.section-title--sm { font-size: var(--text-2xl); }

.section-intro {
  font-size: var(--text-lg); font-weight: var(--weight-regular);
  line-height: var(--leading-relaxed);
  color: var(--color-text); max-width: 780px; margin-top: var(--space-8); margin-bottom: 72px;
}

.subsection-title {
  font-family: var(--font-display); font-size: var(--text-md);
  font-weight: var(--weight-bold); letter-spacing: var(--tracking-wider);
  text-transform: uppercase; color: var(--color-primary);
  margin-bottom: var(--space-8);
  display: flex; align-items: center; gap: var(--space-4);
}
.subsection-title::after { content: ''; flex: 1; height: 1px; background: rgba(29,67,130,0.15); }

/* Dark section overrides */
.section--dark .section-label       { color: rgba(254,216,0,0.8); }
.section--dark .section-title       { color: var(--color-text-on-dark); }
.section--dark .section-title em    { color: var(--color-accent); }

/* ============================================================
   ANIMATIONS & REVEAL
   ============================================================ */
@keyframes fadeUp {
  from { opacity: 0; transform: translateY(40px); }
  to   { opacity: 1; transform: translateY(0); }
}
@keyframes bounce {
  0%, 100% { transform: translateX(-50%) translateY(0); }
  50%       { transform: translateX(-50%) translateY(8px); }
}
.reveal {
  opacity: 0; transform: translateY(30px);
  transition: opacity var(--transition-reveal), transform var(--transition-reveal);
}
.reveal.visible { opacity: 1; transform: translateY(0); }

/* ============================================================
   FOOTER
   ============================================================ */
footer {
  background: var(--color-surface-dark);
  border-top: 3px solid var(--color-primary);
  padding: 60px var(--space-5) var(--space-8);
  position: relative; overflow: hidden;
}
.footer-inner  { max-width: var(--container-max); margin: 0 auto; position: relative; z-index: 1; }
.footer-grid   { display: grid; grid-template-columns: 2fr 1fr 1fr 1fr; gap: var(--space-12); margin-bottom: var(--space-12); }
.footer-logo   { font-family: var(--font-display); font-size: var(--text-xl); font-weight: var(--weight-black); color: var(--color-text-on-dark); margin-bottom: var(--space-3); }
.footer-tagline { font-size: var(--text-md); font-weight: var(--weight-light); color: rgba(255,255,255,0.4); line-height: var(--leading-normal); }
.footer-heading { font-family: var(--font-display); font-size: var(--text-xs); font-weight: var(--weight-semibold); letter-spacing: var(--tracking-widest); text-transform: uppercase; color: var(--color-accent); margin-bottom: var(--space-5); }
.footer-links  { list-style: none; }
.footer-links li { margin-bottom: var(--space-3); }
.footer-links li a { color: rgba(255,255,255,0.45); text-decoration: none; font-size: var(--text-md); font-weight: var(--weight-light); transition: color var(--transition-fast); }
.footer-links li a:hover { color: var(--color-accent); }
.footer-contact p { color: rgba(255,255,255,0.45); font-size: var(--text-base); margin-bottom: var(--space-2); }
.footer-bottom { border-top: 1px solid rgba(29,67,130,0.4); padding-top: var(--space-6); display: flex; justify-content: space-between; align-items: center; }
.footer-bottom p  { font-size: var(--text-sm); color: rgba(255,255,255,0.2); }
.footer-scout-law { font-family: var(--font-display); font-size: var(--text-xs); font-weight: var(--weight-semibold); letter-spacing: var(--tracking-wider); color: var(--color-accent); text-transform: uppercase; }

/* ============================================================
   RESPONSIVE
   ============================================================ */
/* ── Hamburger button ── */
.nav-hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  padding: 8px;
  cursor: pointer;
}
.nav-hamburger span {
  display: block;
  width: 24px;
  height: 2px;
  background: #fff;
  transition: all 0.3s ease;
}
nav.nav-scrolled .nav-hamburger span { background: var(--color-primary); }
.nav-hamburger.open span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.nav-hamburger.open span:nth-child(2) { opacity: 0; }
.nav-hamburger.open span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

@media (max-width: 900px) {
  .nav-hamburger { display: flex; }
  nav ul {
    display: none;
    position: fixed;
    top: var(--nav-height);
    left: 0; right: 0;
    background: var(--color-primary);
    flex-direction: column;
    padding: var(--space-6) var(--space-8);
    gap: 0;
    border-top: 1px solid rgba(255,255,255,0.1);
  }
  nav ul.open { display: flex; }
  nav ul li a {
    display: block;
    padding: var(--space-4) 0;
    border-bottom: 1px solid rgba(255,255,255,0.08);
    font-size: var(--text-sm);
  }
  .footer-grid { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 600px) {
  .footer-grid { grid-template-columns: 1fr; }
}
@media (max-width: 600px) {
  .footer-grid { grid-template-columns: 1fr; }
}

/* ============================================================
   PATTERN TOGGLE — body.no-pattern үед бүх pattern арилна
   ============================================================ */
body.no-pattern {
  background-image: none !important;
}
body.no-pattern .promise-box::before,
body.no-pattern #about::after,
body.no-pattern .highlight-box::before,
body.no-pattern .curriculum-highlight::before,
body.no-pattern .intro-highlight::before,
body.no-pattern #join::before,
body.no-pattern .landscape-break::before,
body.no-pattern .hist-mission::before {
  display: none !important;
}

/* ── Pattern switch товч ── */
.pattern-switch {
  position: fixed;
  bottom: 28px;
  right: 28px;
  z-index: 999;
  display: flex;
  align-items: center;
  gap: 8px;
  background: var(--color-surface-dark);
  border: 1px solid rgba(255,255,255,0.15);
  padding: 8px 14px 8px 10px;
  cursor: pointer;
  box-shadow: 0 4px 20px rgba(0,0,0,0.25);
  transition: background 0.2s;
  user-select: none;
}
.pattern-switch:hover { background: var(--color-primary); }
.pattern-switch__icon {
  font-size: 1rem;
  line-height: 1;
}
.pattern-switch__label {
  font-family: var(--font-display);
  font-size: 0.65rem;
  font-weight: var(--weight-semibold);
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: rgba(255,255,255,0.75);
  line-height: 1;
}
.pattern-switch__toggle {
  width: 32px;
  height: 18px;
  background: rgba(255,255,255,0.15);
  border-radius: 9px;
  position: relative;
  transition: background 0.2s;
  margin-left: 4px;
}
.pattern-switch__toggle::after {
  content: '';
  position: absolute;
  top: 3px; left: 3px;
  width: 12px; height: 12px;
  border-radius: 50%;
  background: rgba(255,255,255,0.6);
  transition: transform 0.2s, background 0.2s;
}
.pattern-switch--on .pattern-switch__toggle {
  background: var(--color-accent);
}
.pattern-switch--on .pattern-switch__toggle::after {
  transform: translateX(14px);
  background: var(--color-surface-dark);
}