/* ============================================================================
   ROBOTICS CLUB NIE — theme.css
   Shared foundation & design tokens for every page across the website.
   Load this BEFORE each page's specific stylesheet.
   ============================================================================ */

:root {
  /* ---- Palette Tokens ---- */
  --cyan: rgb(65, 182, 200);
  --cyan-glow: #00eaff;
  --cyan-deep: #338896;
  --navy-dark: #000814;
  --navy-deep: #001a33;
  --navy: #0D2C4E;
  --navy-mid: rgba(0, 33, 69, 1);
  --white: rgb(245, 245, 245);
  --text-light: #b8d8ff;
  --text-muted: #94a3b8;
  --ice: #e0ffff;
  --accent-pink: #e879a0;
  --accent-green: #00ff88;

  /* ---- Animation & Transition Tokens ---- */
  --ease-spring: cubic-bezier(0.16, 1, 0.3, 1);
  --ease-smooth: cubic-bezier(0.4, 0, 0.2, 1);
  --card-hover-trans: transform 0.35s var(--ease-spring), box-shadow 0.35s ease, border-color 0.3s ease;

  /* ---- Layout Dimensions ---- */
  --nav-h: 70px;
  --banner-h: 0px;
  --header-offset: calc(var(--nav-h) + var(--banner-h));
}

/* ============================================================================
   ANCHOR OFFSET & SMOOTH SCROLLING
   ============================================================================ */
html {
  scroll-behavior: smooth;
  scroll-padding-top: calc(var(--header-offset) + 16px);
  -webkit-text-size-adjust: 100%;
}

[id] {
  scroll-margin-top: calc(var(--header-offset) + 16px);
}

/* ============================================================================
   GLOBAL BODY & OVERFLOW GUARD
   ============================================================================ */
body {
  background-color: var(--navy-dark, #000814) !important;
  background-image: 
    radial-gradient(circle at 15% 20%, rgba(0, 180, 216, 0.08) 0%, transparent 40%),
    radial-gradient(circle at 85% 80%, rgba(25, 49, 159, 0.12) 0%, transparent 40%),
    url("images/bgimg3.png") !important;
  background-repeat: no-repeat !important;
  background-attachment: fixed !important;
  background-size: cover !important;
  background-position: center !important;
  color: #f1f5f9;
  font-family: 'Space Grotesk', -apple-system, BlinkMacSystemFont, sans-serif;
  min-height: 100vh;
  margin: 0;
  padding: 0;
  overflow-x: hidden;
  overflow-x: clip;
}

/* Sleek Cyber Scrollbar */
::-webkit-scrollbar {
  width: 8px;
  height: 8px;
}

::-webkit-scrollbar-track {
  background: rgba(0, 8, 20, 0.95);
}

::-webkit-scrollbar-thumb {
  background: rgba(0, 234, 255, 0.3);
  border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
  background: rgba(0, 234, 255, 0.65);
}

/* ============================================================================
   KEYBOARD ACCESSIBILITY & SKIP LINK
   ============================================================================ */
a:focus-visible,
button:focus-visible,
input:focus-visible,
select:focus-visible,
textarea:focus-visible,
[tabindex]:focus-visible {
  outline: 2px solid var(--cyan-glow);
  outline-offset: 3px;
  border-radius: 4px;
}

.skip-link {
  position: absolute;
  left: -9999px;
  top: 0;
  z-index: 9999;
  padding: 10px 18px;
  background: var(--navy-mid);
  color: var(--cyan-glow);
  border: 1px solid var(--cyan);
  border-radius: 0 0 8px 0;
  font-family: 'Space Grotesk', sans-serif;
  font-size: 15px;
  text-decoration: none;
  transition: top 0.2s ease;
}

.skip-link:focus {
  left: 0;
}

/* ============================================================================
   REDUCED MOTION
   ============================================================================ */
@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }

  .reveal {
    opacity: 1 !important;
    transform: none !important;
  }
}

/* ============================================================================
   SHARED MODERN NAVBAR (Single Source of Truth)
   ============================================================================ */
#custom-navbar {
  position: fixed;
  top: var(--banner-h, 0px);
  left: 0;
  width: 100%;
  z-index: 1000;
  background: rgba(0, 8, 20, 0.88);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border-bottom: 1px solid rgba(0, 234, 255, 0.18);
  padding: 0.6rem 2rem;
  height: auto;
  min-height: 64px;
  transition: background 0.3s ease, border-color 0.3s ease, box-shadow 0.3s ease;
  display: flex;
  align-items: center;
}

#custom-navbar.scrolled {
  background: rgba(0, 6, 16, 0.96);
  border-bottom-color: rgba(0, 234, 255, 0.3);
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.6);
}

#navlogo {
  margin-left: 0;
  flex-shrink: 0;
  display: inline-flex;
  align-items: center;
}

#navlogo img {
  width: clamp(100px, 14vw, 150px);
  height: auto;
  transition: transform 0.25s ease;
}

#navlogo:hover img {
  transform: scale(1.04);
}

.navbar-toggler {
  border: 1px solid rgba(0, 234, 255, 0.35);
  padding: 6px 10px;
  border-radius: 6px;
  background: rgba(0, 234, 255, 0.05);
  cursor: pointer;
  transition: all 0.25s ease;
}

.navbar-toggler:hover {
  background: rgba(0, 234, 255, 0.15);
  border-color: var(--cyan-glow);
  box-shadow: 0 0 10px rgba(0, 234, 255, 0.3);
}

.navbar-toggler:focus {
  box-shadow: 0 0 12px rgba(0, 234, 255, 0.4);
}

.navitems {
  margin-left: auto;
  height: auto;
  font-family: 'Space Grotesk', sans-serif;
  font-size: 0.95rem;
}

.navitems ul {
  list-style: none;
  display: flex;
  align-items: center;
  margin: 0;
  padding: 0;
  gap: 1.25rem;
  height: auto;
}

.navitems li {
  padding: 0;
  margin: 0;
}

.navitems li a,
.navitems a {
  color: #b8d8ff;
  text-decoration: none;
  font-size: 0.95rem;
  font-weight: 500;
  padding: 6px 12px;
  border-radius: 6px;
  transition: all 0.25s ease;
  position: relative;
  display: inline-flex;
  align-items: center;
}

.navitems li a:hover,
.navitems a:hover,
.navitems li a.active,
.navitems a.active {
  color: #00eaff;
  background: rgba(0, 234, 255, 0.1);
  box-shadow: 0 0 12px rgba(0, 234, 255, 0.2);
}

.navitems a.cta {
  background: linear-gradient(135deg, rgb(65, 182, 200), rgb(25, 49, 159)) !important;
  color: #fff !important;
  border-radius: 6px !important;
}

.navitems a.cta:hover {
  box-shadow: 0 0 15px rgba(0, 234, 255, 0.4) !important;
  color: #fff !important;
}

/* Mobile Nav Drawer (< 992px) */
@media (max-width: 991px) {
  #custom-navbar {
    padding: 0.5rem 1.25rem;
  }

  .navitems.collapse:not(.show) {
    display: none;
  }

  .navitems.collapse.show {
    display: block;
    background: rgba(0, 10, 24, 0.97);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    padding: 18px 22px;
    border-bottom: 1px solid rgba(0, 234, 255, 0.25);
    box-shadow: 0 15px 35px rgba(0, 0, 0, 0.85);
    animation: navSlideDown 0.3s var(--ease-spring) forwards;
  }

  @keyframes navSlideDown {
    from {
      opacity: 0;
      transform: translateY(-8px);
    }
    to {
      opacity: 1;
      transform: translateY(0);
    }
  }

  .navitems ul {
    flex-direction: column;
    align-items: stretch;
    gap: 8px;
  }

  .navitems li a,
  .navitems a {
    width: 100%;
    padding: 10px 16px;
    font-size: 1rem;
    border-radius: 8px;
    min-height: 44px;
  }
}

/* ============================================================================
   SHARED REVEAL & GLASSMORPHIC UTILITIES
   ============================================================================ */
.reveal {
  opacity: 0;
  transform: translateY(22px);
  transition: opacity 0.65s var(--ease-spring), transform 0.65s var(--ease-spring);
  will-change: opacity, transform;
}

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

.glass-card {
  background: rgba(0, 18, 38, 0.78);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border: 1px solid rgba(0, 234, 255, 0.22);
  border-radius: 16px;
  transition: var(--card-hover-trans);
}

.glass-card:hover {
  border-color: var(--cyan-glow);
  box-shadow: 0 16px 36px rgba(0, 0, 0, 0.6), 0 0 24px rgba(0, 234, 255, 0.25);
  transform: translateY(-6px);
}

.section-hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 18px;
  border-radius: 30px;
  font-size: 0.85rem;
  font-weight: 600;
  letter-spacing: 1px;
  text-transform: uppercase;
  background: rgba(0, 234, 255, 0.1);
  border: 1px solid rgba(0, 234, 255, 0.35);
  color: var(--cyan-glow);
  box-shadow: 0 0 15px rgba(0, 234, 255, 0.2);
  margin-bottom: 16px;
}

.table-responsive {
  width: 100%;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
}