/*
  style.css — APAICM Modern Theme (Blue / Yellow)
  - Responsive layout
  - Cute illustrated background
  - Modern cards, tables, buttons
*/

@import url('https://fonts.googleapis.com/css2?family=Sarabun:wght@400;500;600;700&display=swap');

:root{
  --blue-950:#051a33;
  --blue-900:#06264d;
  --blue-800:#083a71;
  --blue-700:#0A4A87;
  --blue-600:#0d63b2;
  --blue-500:#1b78d2;

  --yellow-600:#f2b600;
  --yellow-500:#FFCC00;
  --yellow-400:#FFD84D;

  --ink:#0b1b33;
  --muted:#5b6b82;
  --line:rgba(8, 58, 113, .12);
  --card:#ffffff;
  --bg:#f6f9ff;

  --shadow: 0 10px 30px rgba(5, 26, 51, .10);
  --shadow-soft: 0 6px 18px rgba(5, 26, 51, .08);
  --radius: 16px;
  --radius-sm: 12px;

  --container: 1180px;
}

*{ box-sizing:border-box; }
html, body{ height:100%; }

body{
  font-family:'Sarabun', sans-serif;
  margin:0;
  color:var(--ink);
  background:
    radial-gradient(1100px 500px at 10% 0%, rgba(255, 204, 0, .16), transparent 55%),
    radial-gradient(900px 500px at 90% 10%, rgba(10, 74, 135, .14), transparent 55%),
    url('/assets/bg-doodles.svg');
  background-repeat:no-repeat;
  background-position: left top, right top, center top;
  background-size: auto, auto, cover;
  line-height:1.65;
}

a{ color:var(--blue-700); text-decoration:none; }
a:hover{ color:var(--blue-600); text-decoration:underline; }

.container{
  width:min(var(--container), calc(100% - 32px));
  margin: 0 auto;
  padding: 22px 0 40px;
}

/* =========================
   Header / Navigation
========================= */
.site-header{
  position: sticky;
  top:0;
  z-index:1000;
  backdrop-filter: blur(10px);
  background: rgba(255,255,255,.78);
  border-bottom: 1px solid var(--line);
}

.header-inner{
  width:min(var(--container), calc(100% - 32px));
  margin:0 auto;
  padding: 14px 0;
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap: 14px;
}

.brand{
  display:flex;
  align-items:center;
  gap: 12px;
  min-width: 220px;
}

.school-logo{
  width:56px;
  height:56px;
  border-radius: 14px;
  background: #fff;
  padding: 8px;
  box-shadow: 0 8px 18px rgba(5,26,51,.10);
}

.header-text h1{
  margin:0;
  font-size: 1.15rem;
  line-height:1.2;
  letter-spacing:.2px;
  color: var(--blue-900);
}
.tagline{
  margin: 4px 0 0;
  color: var(--muted);
  font-size:.92rem;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  max-width: 560px;
}

/* nav links */
.site-nav{
  display:flex;
  align-items:center;
  gap: 8px;
  flex-wrap: wrap;
  justify-content:flex-end;
}

.site-nav a{
  display:inline-flex;
  align-items:center;
  padding: 10px 12px;
  border-radius: 999px;
  color: var(--blue-900);
  font-weight: 600;
  border: 1px solid transparent;
  transition: transform .15s ease, background .15s ease, border-color .15s ease;
}

.site-nav a:hover{
  background: rgba(10, 74, 135, .08);
  border-color: rgba(10, 74, 135, .12);
  text-decoration:none;
  transform: translateY(-1px);
}

.site-nav a.active{
  background: linear-gradient(135deg, rgba(10, 74, 135, .14), rgba(255, 204, 0, .16));
  border-color: rgba(10, 74, 135, .16);
}

/* mobile toggle */
.nav-toggle{
  display:none;
  border: 1px solid rgba(10, 74, 135, .18);
  background: rgba(255,255,255,.9);
  border-radius: 12px;
  padding: 10px 12px;
  box-shadow: 0 8px 18px rgba(5,26,51,.08);
  cursor:pointer;
}
.nav-toggle span{
  display:block;
  width: 22px;
  height: 2px;
  background: var(--blue-700);
  position: relative;
}
.nav-toggle span::before,
.nav-toggle span::after{
  content:"";
  position:absolute;
  left:0;
  width:22px;
  height:2px;
  background: var(--blue-700);
}
.nav-toggle span::before{ top:-7px; }
.nav-toggle span::after{ top:7px; }

@media (max-width: 860px){
  .tagline{ display:none; }
  .nav-toggle{ display:inline-flex; align-items:center; justify-content:center; }
  .site-nav{
    position: fixed;
    top: 72px;
    right: 16px;
    left: 16px;
    display: none;
    flex-direction: column;
    align-items: stretch;
    gap: 6px;
    padding: 12px;
    border-radius: var(--radius);
    background: rgba(255,255,255,.92);
    border: 1px solid var(--line);
    box-shadow: var(--shadow);
  }
  html.nav-open .site-nav{ display:flex; }
  .site-nav a{
    border-radius: 12px;
    justify-content:center;
  }
}

/* =========================
   Sections / Cards
========================= */
.section{
  margin: 18px 0;
}

.section h2{
  color: var(--blue-900);
  margin: 0 0 12px;
  font-size: 1.5rem;
  border-left: 6px solid var(--yellow-500);
  padding-left: 12px;
}

.card,
.info-item,
.concept-box,
.announcement-item,
.stat-box{
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: var(--shadow-soft);
}

.card{ padding: 18px; }

.info-grid{
  display:grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 14px;
}
@media (max-width: 980px){
  .info-grid{ grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 640px){
  .info-grid{ grid-template-columns: 1fr; }
}

.info-item{
  padding: 18px;
  transition: transform .15s ease, box-shadow .15s ease;
}
.info-item:hover{
  transform: translateY(-2px);
  box-shadow: var(--shadow);
}

.text-muted{ color: var(--muted); }

/* =========================
   Buttons
========================= */
.btn-primary,
.btn-secondary,
.btn-download,
.btn-upload,
.read-more{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap: 8px;
  padding: 10px 14px;
  border-radius: 12px;
  font-weight: 700;
  border: 1px solid transparent;
  cursor:pointer;
  transition: transform .12s ease, box-shadow .12s ease, background .12s ease;
  text-decoration:none !important;
}

.btn-primary{
  background: linear-gradient(135deg, var(--blue-700), var(--blue-500));
  color: #fff;
  box-shadow: 0 10px 22px rgba(10,74,135,.18);
}
.btn-primary:hover{ transform: translateY(-1px); }

.btn-secondary{
  background: linear-gradient(135deg, var(--yellow-500), var(--yellow-400));
  color: var(--blue-950);
  border-color: rgba(242, 182, 0, .35);
}
.btn-secondary:hover{ transform: translateY(-1px); }

.btn-download,
.btn-upload,
.read-more{
  background: rgba(10, 74, 135, .06);
  color: var(--blue-900);
  border-color: rgba(10, 74, 135, .14);
}
.btn-download:hover,
.btn-upload:hover,
.read-more:hover{
  background: rgba(10, 74, 135, .10);
  transform: translateY(-1px);
}

/* =========================
   Tables
========================= */
.table-responsive{ overflow-x:auto; }
.data-table{
  width:100%;
  border-collapse: separate;
  border-spacing:0;
  overflow:hidden;
  border-radius: var(--radius);
  border: 1px solid var(--line);
  background: rgba(255,255,255,.9);
}
.data-table th, .data-table td{
  padding: 12px 12px;
  border-bottom: 1px solid rgba(8, 58, 113, .10);
  vertical-align: top;
}
.data-table th{
  background: linear-gradient(135deg, rgba(10,74,135,.10), rgba(255,204,0,.12));
  color: var(--blue-900);
  font-weight: 800;
}
.data-table tr:last-child td{ border-bottom:0; }

/* =========================
   Tags / Pills
========================= */
.tag-event{
  display:inline-flex;
  padding: 6px 10px;
  border-radius: 999px;
  background: rgba(255,204,0,.20);
  color: var(--blue-900);
  font-weight: 800;
  border: 1px solid rgba(242,182,0,.22);
}
.tag-news{
  display:inline-flex;
  padding: 6px 10px;
  border-radius: 999px;
  background: rgba(10,74,135,.10);
  color: var(--blue-900);
  font-weight: 800;
  border: 1px solid rgba(10,74,135,.16);
}

/* =========================
   Media grids
========================= */
.video-grid{
  display:grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 14px;
}
@media (max-width: 980px){
  .video-grid{ grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 640px){
  .video-grid{ grid-template-columns: 1fr; }
}

.video-container{
  position: relative;
  padding-top: 56.25%;
  border-radius: var(--radius);
  overflow:hidden;
  border: 1px solid var(--line);
  box-shadow: var(--shadow-soft);
  background: #fff;
}
.video-container iframe{
  position:absolute;
  inset:0;
  width:100%;
  height:100%;
  border:0;
}

/* =========================
   Footer
========================= */
.site-footer{
  margin-top: 26px;
  background: linear-gradient(135deg, rgba(10,74,135,.92), rgba(6,38,77,.94));
  color: rgba(255,255,255,.92);
  border-top: 1px solid rgba(255,255,255,.12);
}
.footer-inner{
  width:min(var(--container), calc(100% - 32px));
  margin:0 auto;
  padding: 18px 0;
}
.footer-top{
  display:flex;
  flex-wrap: wrap;
  gap: 10px 14px;
  align-items:center;
  justify-content:space-between;
  padding-bottom: 10px;
  border-bottom: 1px dashed rgba(255,255,255,.22);
  margin-bottom: 10px;
}
.footer-top a{
  color: var(--yellow-400);
  font-weight: 800;
}
.footer-bottom{
  font-size: .95rem;
  color: rgba(255,255,255,.88);
}

/* =========================
   Small fixes for existing inline sections
========================= */
.hero-section{
  border-radius: var(--radius);
  overflow: hidden;
  border: 1px solid var(--line);
  box-shadow: var(--shadow-soft);
}
.news-and-links{
  display:grid;
  grid-template-columns: 2fr 1fr;
  gap: 16px;
}
@media (max-width: 980px){
  .news-and-links{ grid-template-columns: 1fr; }
}