/* Basic styles for the student PHP site */
:root{
  --bg:#f4efe8;
  --panel:#ffffff;
  --panel-soft:rgba(255,255,255,0.74);
  --accent:#c77d33;
  --accent-strong:#9f5b1f;
  --accent-alt:#586d73;
  --accent-alt-soft:#e7ecec;
  --text:#1d2430;
  --muted:#4b5563;
  --heading:#18212f;
  --border:rgba(96, 108, 120, 0.28);
  --success:#166534;
  --info:#234d7b;
}
*{box-sizing:border-box}
html {
  scroll-behavior: smooth;
  -webkit-overflow-scrolling: touch;
  -webkit-text-size-adjust: 100%;
  text-size-adjust: 100%;
}

body{font-family:Inter, system-ui, Arial, sans-serif;margin:0;color:var(--text);
  background: var(--bg);
  background-attachment: fixed;
  position:relative;overflow-x:hidden;
  scroll-behavior: smooth;
  -webkit-overflow-scrolling: touch;
  -webkit-text-size-adjust: 100%;
  text-size-adjust: 100%;
  overscroll-behavior-y: contain;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeSpeed;
}

@keyframes gradientShift{
  0%{background-position:0% 50%, 100% 10%, 10% 100%, 0% 50%}
  100%{background-position:100% 0%, 20% 100%, 90% 10%, 100% 50%}
}

/* decorative soft colour blobs */
body::before, body::after{
  content: "";
  position:fixed;
  z-index:-1;
  pointer-events:none;
  filter: blur(90px);
  opacity:0.8;
}
body::before{
  width:640px;height:640px;right:-120px;top:-180px;
  background: radial-gradient(circle at 35% 35%, rgba(251, 191, 36, 0.45), rgba(168, 85, 247, 0.30) 32%, transparent 62%);
}
body::after{
  width:760px;height:760px;left:-220px;bottom:-260px;
  background: radial-gradient(circle at 65% 65%, rgba(34, 197, 94, 0.32), rgba(59, 130, 246, 0.28) 35%, transparent 64%);
}

@media (max-width: 768px) {
  html {
   scroll-behavior: auto;
  }
  body {
   background-attachment: scroll;
   animation: none;
  }
  body::before,
  body::after {
   display: none;
  }
  .resource-card,
  .menu-button,
  .btn,
  .carousel-btn {
   transition: none;
  }
}

@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;
  }
}

.container{width:min(1400px,calc(100% - 24px));margin:0 auto;padding:24px;position:relative;z-index:1}
img,svg,iframe,video,object{max-width:100%;height:auto;display:block}
a,button,input,select,textarea{font:inherit}
 table {
   border-collapse: collapse;
   border-spacing: 0;
   width: 100%;
   max-width: 100%;
   table-layout: auto;
 }
 table th,
 table td {
   border-left: 0;
   border-right: 0;
   border-bottom: 1px solid rgba(148,163,184,0.35);
   white-space: normal;
 }
 .table-wrap,
 div[style*="overflow-x:auto"],
 .table-responsive,
 .scroll-table {
   overflow-x: auto;
   -webkit-overflow-scrolling: touch;
 }
 table thead th {
   border-top: 1px solid rgba(148,163,184,0.45);
 }
 table th:first-child,
 table td:first-child {
   border-left: 0;
 }
 table th:last-child,
 table td:last-child {
   border-right: 0;
 }
main.container > section {
  background: rgba(255,255,255,0.72);
  -webkit-backdrop-filter: blur(0px);
  backdrop-filter: blur(0px);
  border: 1px solid var(--border);
  border-radius: 20px;
  box-shadow: 0 12px 30px rgba(15, 23, 42, 0.05);
  padding: 22px 26px;
}
h1,h2,h3,h4,h5,h6{color:var(--heading);line-height:1.25;margin-top:0}
a{color:var(--accent-alt);text-decoration:none}
a:hover{color:var(--accent-strong)}
p, li, span, div, label{color:var(--text)}
.site-header{background:linear-gradient(180deg, rgba(255,255,255,0.94), rgba(248,250,252,0.9));border-bottom:1px solid rgba(148,163,184,0.4)}
.nav-wrap{display:flex;align-items:center;justify-content:space-between;padding:16px 0}
.brand{font-weight:800;color:var(--accent-strong)}
.main-nav{display:flex;gap:18px;align-items:center}
.main-nav a{color:var(--muted);font-weight:700}
.main-nav a[aria-current="page"]{color:var(--text)}
.btn{padding:10px 16px;border-radius:10px;border:1px solid rgba(148,163,184,0.35);cursor:pointer;transition:all 0.2s ease;background:#fff;color:var(--text);font-weight:700}
.btn:hover{transform:translateY(-1px);box-shadow:0 8px 18px rgba(15,23,42,0.08)}
.btn-primary{background:linear-gradient(135deg,var(--accent),#f59e0b);color:white;border:none}
.section-spacing{padding:48px 0}
.site-footer{background:linear-gradient(135deg,#1f2937,#0f172a);color:#fff;padding:12px 0;margin-top:36px}
/* constrain footer content to a smaller centered column */
.site-footer .container{width:min(800px,calc(100% - 32px));margin:0 auto;padding:12px 0}
.footer-wrap{display:flex;justify-content:center;gap:18px;align-items:center}
.site-footer p{margin:0;font-size:0.95rem;color:rgba(255,255,255,0.9)}
.errors ul{margin:0;padding-left:18px}
label input, label textarea{width:100%;padding:8px;border:1px solid rgba(148,163,184,0.7);border-radius:8px;background:rgba(255,255,255,0.82);color:var(--text)}
@media(max-width:720px){.main-nav{display:none}.nav-toggle{display:block}}

/* Resource grid styles */
.resource-grid{
  display:grid;
  grid-template-columns:repeat(3,1fr);
  gap:20px;
  margin-top:20px;
}
.resource-card{
  position:relative;
  display:flex;
  flex-direction:column;
  align-items:center;
  justify-content:center;
  aspect-ratio:1/1;
  border-radius:16px;
  text-decoration:none;
  color:#fff;
  padding:18px;
  overflow:hidden;
  background-size:cover;
  background-position:center;
  background-repeat:no-repeat;
  transition:transform 0.18s ease, box-shadow 0.18s ease, filter 0.18s ease;
  box-shadow:0 12px 30px rgba(16,24,40,0.08);
}
.resource-card::before{
  content:"";
  position:absolute;
  inset:0;
  background:linear-gradient(180deg, rgba(15,23,42,0.12), rgba(15,23,42,0.6));
}
.resource-card:hover{transform:translateY(-6px);box-shadow:0 26px 60px rgba(16,24,40,0.12);filter:brightness(1.02)}
.resource-card:hover .resource-label{color:#ff9f43}
.resource-card > *{position:relative;z-index:1}
.resource-icon{margin-bottom:12px;display:flex;align-items:center;justify-content:center}
.resource-icon svg{width:64px;height:64px;fill:rgba(255,255,255,0.98);}
.resource-label{font-weight:800;color:rgba(255,255,255,0.95);font-size:1.6rem;letter-spacing:0.03em;text-align:center;text-shadow:0 6px 18px rgba(0,0,0,0.12);transition:color 0.18s ease, transform 0.18s ease}

/* inspirational image backgrounds */
.card-books{background-image:linear-gradient(135deg, rgba(90,40,170,0.32), rgba(37,99,235,0.18)), url('https://images.unsplash.com/photo-1516979187457-637abb4f9353?auto=format&fit=crop&w=900&q=80')}
.card-electronic{background-image:linear-gradient(135deg, rgba(13,148,136,0.28), rgba(59,130,246,0.18)), url('https://images.unsplash.com/photo-1498050108023-c5249f4df085?auto=format&fit=crop&w=900&q=80')}
.card-computer{background-image:linear-gradient(135deg, rgba(124,58,237,0.30), rgba(236,72,153,0.18)), url('https://images.unsplash.com/photo-1515879218367-8466d910aaa4?auto=format&fit=crop&w=900&q=80')}
.card-ece{background-image:linear-gradient(135deg, rgba(249,115,22,0.28), rgba(239,68,68,0.18)), url('https://images.unsplash.com/photo-1581092918056-0c4c3acd3789?auto=format&fit=crop&w=900&q=80')}
.card-cse{background-image:linear-gradient(135deg, rgba(16,185,129,0.26), rgba(6,182,212,0.18)), url('https://images.unsplash.com/photo-1522202176988-66273c2fd55f?auto=format&fit=crop&w=900&q=80')}
.card-intern{background-image:linear-gradient(135deg, rgba(8,47,73,0.42), rgba(14,116,144,0.22)), url('https://images.unsplash.com/photo-1552664730-d307ca884978?auto=format&fit=crop&w=900&q=80')}

@media(max-width:920px){
  .resource-grid{grid-template-columns:repeat(2,1fr)}
  .container{width:min(100%,calc(100% - 16px));padding:18px 10px}
  main.container > section{padding:18px 16px}
  .nav-wrap{gap:12px}
  .slide-inner{height:360px;padding:28px}
  .slide-inner h2{font-size:1.9rem}
}
@media(max-width:640px){
  .resource-grid{grid-template-columns:1fr}
  .site-header{padding:8px 0}
  .nav-wrap{flex-direction:column;align-items:stretch}
  .brand{justify-content:center;text-align:center}
  .menu-wrap{width:100%}
  .menu-button{width:100%;justify-content:space-between}
  .menu-dropdown{left:0;right:0;min-width:auto}
  .container{width:calc(100% - 16px);padding:14px 8px}
  main.container > section{padding:16px 12px;border-radius:16px}
  .footer-wrap{flex-direction:column;gap:10px;text-align:center}
  .section-spacing{padding:22px 0}
  .resource-card{aspect-ratio: 1.2 / 1}
  .resource-label{font-size:1.2rem}
  .menu-dropdown a{padding:12px 10px}
  h1{font-size:1.8rem}
  h2{font-size:1.4rem}
  h3{font-size:1.2rem}
  form, .field-row, .aligned-field, .description-field{grid-template-columns:1fr !important}
  input, select, textarea, button, .btn{width:100% !important;max-width:none !important}
  .btn{display:inline-flex;align-items:center;justify-content:center}
  .carousel{padding:0 8px}
  .carousel-btn{display:none !important}
  .slide-inner{height:260px;padding:20px}
  .slide-inner h2{font-size:1.4rem}
  .slide-overlay{max-width:100%}
  * {
     -webkit-tap-highlight-color: transparent;
  }
}

/* Navigation styling */
.site-header{
  background: linear-gradient(180deg, rgba(255,255,255,0.92), rgba(255,255,255,0.86));
  border-bottom: 1px solid rgba(16,24,40,0.06);
  position:sticky;top:0;backdrop-filter: blur(6px);z-index:40;padding:10px 0
}
.nav-wrap{display:flex;align-items:center;justify-content:space-between;gap:20px}
.brand{font-weight:900;color:var(--accent);font-size:1.15rem;display:flex;align-items:center;gap:10px}

.menu-wrap{position:relative}
.menu-button{display:inline-flex;align-items:center;gap:8px;padding:10px 14px;border-radius:12px;background:linear-gradient(135deg,#fff,#fff);border:1px solid rgba(16,24,40,0.06);cursor:pointer;font-weight:800;color:var(--text);box-shadow:0 8px 20px rgba(16,24,40,0.04)}
.menu-button .chev{font-size:0.92rem;color:var(--muted);transition:transform 0.18s ease}
.menu-button[aria-expanded="true"] .chev{transform:rotate(180deg)}

.menu-dropdown{position:absolute;right:0;top:calc(100% + 10px);min-width:200px;background:linear-gradient(180deg,#ffffff,#fffaf6);border-radius:12px;padding:10px;border:1px solid rgba(16,24,40,0.06);box-shadow:0 18px 40px rgba(16,24,40,0.08);display:none}
.menu-dropdown a{display:block;padding:10px 12px;border-radius:8px;color:var(--text);text-decoration:none;font-weight:700}
.menu-dropdown a:hover{background:linear-gradient(135deg, rgba(124,58,237,0.08), rgba(249,115,22,0.08));color:var(--accent-strong)}
.menu-dropdown.open{display:block}

/* small screens: full width dropdown */
@media (max-width:640px){
  .menu-dropdown{left:8px;right:8px;top:calc(100% + 8px);min-width:auto}
  .menu-button{padding:9px 12px}
}

/* Carousel styles */
.hero-carousel{padding:28px 0 12px}
.carousel{position:relative;max-width:1200px;margin:0 auto;border-radius:18px;overflow:visible;padding:0 12px}
.carousel-track-wrapper{overflow:hidden;border-radius:18px;box-shadow:0 18px 42px rgba(15,23,42,0.12)}
.carousel-track{display:flex;transition:transform 480ms cubic-bezier(.22,.9,.31,1);list-style:none;padding:0;margin:0}
.slide{min-width:100%;box-sizing:border-box;padding:0}
.slide-inner{height:420px;border-radius:18px;display:flex;align-items:flex-end;padding:36px;color:#fff;position:relative;overflow:hidden;background-color:#dfe7ef;background-size:cover;background-position:center;background-repeat:no-repeat}
.slide-inner::before{content:"";position:absolute;inset:0;background:linear-gradient(180deg, rgba(15, 23, 42, 0.06), rgba(15, 23, 42, 0.58));}
.slide-overlay{position:relative;z-index:1;max-width:520px}
.slide-inner h2{margin:0 0 12px;font-size:2.4rem;color:#fff;text-shadow:0 4px 18px rgba(0,0,0,0.25)}
.slide-inner p{margin:0;color:rgba(255,255,255,0.96);font-size:1.05rem;line-height:1.5;text-shadow:0 4px 12px rgba(0,0,0,0.2)}
.carousel-btn{position:absolute;top:50%;transform:translateY(-50%);width:52px;height:52px;border-radius:12px;border:0;background:rgba(15,23,42,0.38);color:#fff;font-size:26px;display:grid;place-items:center;cursor:pointer;backdrop-filter:blur(4px);z-index:2}
.carousel-btn.prev{left:0}
.carousel-btn.next{right:0}
.carousel-dots{display:flex;gap:8px;justify-content:center;margin-top:16px}
.carousel-dots button{width:12px;height:12px;border-radius:999px;border:0;background:rgba(15,23,42,0.25);cursor:pointer}
.carousel-dots button.active{background:rgba(15,23,42,0.9)}es */
.slide-inner{height:420px;border-radius:12px;display:flex;flex-direction:column;justify-content:center;padding:36px;color:#fff;box-shadow:0 18px 44px rgba(13,14,22,0.14)}
.slide-inner h2{margin:0 0 12px;font-size:2.4rem}
.slide-inner p{margin:0;color:rgba(255,255,255,0.96);font-size:1.05rem}

.carousel-btn{position:absolute;top:50%;transform:translateY(-50%);width:52px;height:52px;border-radius:12px;border:0;background:rgba(0,0,0,0.18);color:#fff;font-size:26px;display:grid;place-items:center;cursor:pointer}
.carousel-btn.prev{left:12px}
.carousel-btn.next{right:12px}
.carousel-dots{display:flex;gap:8px;justify-content:center;margin-top:16px}
.carousel-dots button{width:12px;height:12px;border-radius:999px;border:0;background:rgba(0,0,0,0.18);cursor:pointer}
.carousel-dots button.active{background:rgba(0,0,0,0.9)}

@media (max-width:1024px){
  .slide-inner{height:360px;padding:28px}
  .slide-inner h2{font-size:1.9rem}
}

@media (max-width:720px){
  .slide-inner{height:300px;padding:20px}
  .carousel-btn{width:40px;height:40px}
  .slide-inner h2{font-size:1.4rem}
}

@media (max-width:420px){
  .slide-inner{height:260px}
  .slide-inner h2{font-size:1.2rem}
}

/* YouTube grid */
.youtube-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px;margin-top:24px}
.youtube-card{background:linear-gradient(180deg, rgba(255,255,255,0.94), rgba(255,255,255,0.92));border-radius:12px;overflow:hidden;box-shadow:0 12px 30px rgba(16,24,40,0.06)}
.youtube-card .embed{width:100%;aspect-ratio:16/9;background:#000}
.youtube-card .meta{padding:12px}
.youtube-card h3{margin:0;font-size:1rem;color:var(--text)}
@media(max-width:920px){.youtube-grid{grid-template-columns:repeat(2,1fr)}}
@media(max-width:640px){.youtube-grid{grid-template-columns:1fr}}