/* =========================================
   Board Theme - SUT Official Palette Design
   มหาวิทยาลัยเทคโนโลยีสุรนารี
   Palette:
     - #F26522 (SUT Orange — สีหลัก)
     - #a67436 (SUT Gold / Bronze)
     - #6d6e70 (SUT Neutral Gray)
     - #2d2f33 (SUT Warm Slate / Charcoal — สว่างขึ้น ไม่มืดทึบ)
   ========================================= */

@import url('https://fonts.googleapis.com/css2?family=Kanit:wght@300;400;500;600;700&display=swap');

/* ---- CSS Variables ---- */
:root {
  --primary:        #F26522;   /* SUT Orange (เน้นหลัก) */
  --primary-dark:   #d34f11;
  --primary-light:  #ff7c3c;
  --primary-soft:   #fff2eb;

  --secondary:      #a67436;   /* SUT Warm Gold / Bronze */
  --secondary-dark: #875c27;
  --secondary-soft: #fbf7f2;

  --neutral-gray:   #6d6e70;   /* SUT Neutral Gray */
  --neutral-dark:   #2d2f33;   /* Warm Slate Charcoal (นุ่มนวล ไม่มืดสนิท) */

  --bg:             #f8f8fa;
  --card-bg:        #ffffff;
  --text-main:      #222427;   /* สีตัวอักษรหลัก สบายตา */
  --text-muted:     #6d6e70;
  --border:         #e3e4e7;

  --shadow-sm:      0 2px 10px rgba(0,0,0,.05);
  --shadow-md:      0 10px 28px rgba(242,101,34,.16);
  --shadow-lg:      0 22px 50px rgba(0,0,0,.15);
  --radius-sm:      8px;
  --radius-md:      14px;
  --radius-lg:      20px;
  --nav-h:          70px;
  --transition:     .3s cubic-bezier(.4,0,.2,1);
}

/* ---- Reset & Base ---- */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

html { scroll-behavior: smooth; }

body {
  font-family: 'Kanit', sans-serif;
  background: var(--bg);
  color: var(--text-main);
  line-height: 1.6;
  font-size: 15px;
  padding-top: var(--nav-h);
}

/* =========================================
   NAVBAR
   ========================================= */
.board-navbar {
  position: fixed;
  top: 0; left: 0; right: 0;
  height: var(--nav-h);
  background: linear-gradient(135deg, var(--primary) 0%, #e05412 60%, #c84609 100%);
  box-shadow: 0 4px 20px rgba(242,101,34,.32);
  border-bottom: 2px solid var(--secondary);
  z-index: 1000;
  display: flex;
  align-items: center;
}

.board-navbar .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 20px;
}

.nav-brand {
  display: flex;
  align-items: center;
  gap: 12px;
  text-decoration: none !important;
  flex-shrink: 0;
}
.nav-brand-icon {
  width: 42px; height: 42px;
  background: #ffffff;
  color: var(--primary);
  border-radius: 12px;
  display: flex; align-items: center; justify-content: center;
  font-size: 20px;
  flex-shrink: 0;
  box-shadow: 0 3px 10px rgba(0,0,0,.15);
  border: 2px solid rgba(255,255,255,.4);
}
.nav-brand-text {
  font-size: 15px;
  font-weight: 600;
  color: #ffffff;
  line-height: 1.2;
  letter-spacing: .2px;
}
.nav-brand-sub {
  font-size: 11px;
  color: rgba(255,255,255,.85);
  font-weight: 300;
}

/* Hamburger */
.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  cursor: pointer;
  padding: 8px;
  background: rgba(0,0,0,.12);
  border: 1px solid rgba(255,255,255,.2);
  border-radius: 8px;
}
.nav-toggle span {
  display: block;
  width: 22px; height: 2px;
  background: #ffffff;
  border-radius: 2px;
  transition: var(--transition);
}
.nav-toggle.active span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.nav-toggle.active span:nth-child(2) { opacity: 0; }
.nav-toggle.active span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* Nav Menu */
.nav-menu {
  display: flex;
  align-items: center;
  list-style: none;
  gap: 4px;
}
.nav-menu .nav-item { position: relative; }

.nav-menu .nav-link {
  display: flex; align-items: center; gap: 4px;
  padding: 8px 14px;
  color: #ffffff !important;
  text-decoration: none !important;
  font-size: 14px;
  font-weight: 500;
  border-radius: var(--radius-sm);
  transition: var(--transition);
  white-space: nowrap;
}
.nav-menu .nav-link:hover,
.nav-menu .nav-link.active,
.nav-menu .nav-item.open .nav-link {
  background: rgba(0,0,0,.18);
  color: #ffffff !important;
}
.nav-menu .nav-link .arrow {
  font-size: 10px;
  transition: transform var(--transition);
}
.nav-item:hover .arrow,
.nav-item.open .arrow {
  transform: rotate(180deg);
}

/* Dropdown */
.dropdown-menu {
  display: none;
  position: absolute;
  top: 100%;
  left: 0;
  min-width: 235px;
  background: #ffffff;
  border-radius: var(--radius-md);
  box-shadow: 0 12px 35px rgba(0,0,0,.15);
  border-top: 3px solid var(--primary);
  border-left: 1px solid var(--border);
  border-right: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
  padding: 8px;
  margin-top: 2px;
  animation: dropIn .18s ease;
  z-index: 200;
}

/* Invisible hover bridge to prevent cursor from losing focus */
.dropdown-menu::before {
  content: '';
  position: absolute;
  top: -15px;
  left: 0;
  right: 0;
  height: 15px;
}

@keyframes dropIn {
  from { opacity: 0; transform: translateY(-6px); }
  to   { opacity: 1; transform: translateY(0); }
}

.nav-item:hover .dropdown-menu,
.nav-item.open .dropdown-menu {
  display: block;
}

.dropdown-menu a {
  display: block;
  padding: 9px 14px;
  color: var(--text-main) !important;
  text-decoration: none !important;
  font-size: 14px;
  font-weight: 400;
  border-radius: var(--radius-sm);
  transition: all var(--transition);
}
.dropdown-menu a:hover {
  background: var(--primary-soft);
  color: var(--primary) !important;
  padding-left: 18px;
}

/* Mobile nav overlay */
@media (max-width: 900px) {
  .nav-toggle { display: flex; }
  .nav-menu {
    position: fixed;
    top: var(--nav-h); left: 0; right: 0; bottom: 0;
    background: linear-gradient(180deg, var(--primary) 0%, #c84609 100%);
    flex-direction: column;
    align-items: flex-start;
    gap: 0;
    overflow-y: auto;
    padding: 16px 0 80px;
    transform: translateX(-100%);
    transition: transform var(--transition);
    border-top: 2px solid var(--secondary);
  }
  .nav-menu.open { transform: translateX(0); }
  .nav-menu .nav-item { width: 100%; }
  .nav-menu .nav-link {
    padding: 14px 20px;
    border-radius: 0;
    font-size: 15px;
    color: #ffffff !important;
    border-bottom: 1px solid rgba(255,255,255,.12);
  }
  .nav-menu .nav-link:hover,
  .nav-menu .nav-link.active {
    background: rgba(0,0,0,.15);
    color: #ffffff !important;
  }
  .dropdown-menu {
    position: static;
    background: rgba(0,0,0,.1);
    box-shadow: none;
    border-radius: 0;
    border: none;
    padding: 0 0 0 20px;
    display: none !important;
  }
  .nav-item.mob-open .dropdown-menu { display: block !important; }
  .dropdown-menu a {
    color: rgba(255,255,255,.9) !important;
    border-radius: 0;
    border-bottom: 1px solid rgba(255,255,255,.06);
  }
  .dropdown-menu a:hover {
    background: rgba(0,0,0,.15);
    color: #fff !important;
  }
}

/* =========================================
   PAGE HEADER BANNER (สดใส สว่าง สมเกียรติ)
   ========================================= */
.page-banner {
  background: linear-gradient(135deg, var(--primary) 0%, #ff742e 50%, var(--secondary) 100%);
  padding: 48px 20px 44px;
  text-align: center;
  position: relative;
  overflow: hidden;
  border-bottom: 3px solid rgba(0,0,0,.08);
  box-shadow: inset 0 -8px 20px rgba(0,0,0,.04);
}
.page-banner::before {
  content: '';
  position: absolute; inset: 0;
  background: url("data:image/svg+xml,%3Csvg width='60' height='60' viewBox='0 0 60 60' xmlns='http://www.w3.org/2000/svg'%3E%3Cg fill='none' fill-rule='evenodd'%3E%3Cg fill='%23ffffff' fill-opacity='0.06'%3E%3Cpath d='M36 34v-4h-2v4h-4v2h4v4h2v-4h4v-2h-4zm0-30V0h-2v4h-4v2h4v4h2V6h4V4h-4zM6 34v-4H4v4H0v2h4v4h2v-4h4v-2H6zM6 4V0H4v4H0v2h4v4h2V6h4V4H6z'/%3E%3C/g%3E%3C/g%3E%3C/svg%3E");
}
.page-banner h1 {
  font-size: clamp(22px, 4vw, 36px);
  font-weight: 700;
  color: #ffffff;
  text-shadow: 0 2px 10px rgba(0,0,0,.18);
  position: relative;
  margin-bottom: 8px;
}
.page-banner p {
  color: rgba(255,255,255,.92);
  font-size: 14px;
  position: relative;
}
.page-banner .banner-badge {
  display: inline-block;
  background: rgba(255,255,255,.22);
  color: #ffffff;
  font-size: 12px;
  font-weight: 600;
  padding: 4px 16px;
  border-radius: 20px;
  margin-bottom: 12px;
  position: relative;
  box-shadow: 0 2px 8px rgba(0,0,0,.1);
  border: 1px solid rgba(255,255,255,.35);
  backdrop-filter: blur(4px);
}

/* =========================================
   SECTION HEADING
   ========================================= */
.section-heading {
  display: flex;
  align-items: center;
  gap: 12px;
  margin: 40px 0 24px;
}
.section-heading::before {
  content: '';
  width: 5px;
  height: 34px;
  background: linear-gradient(to bottom, var(--primary), var(--secondary));
  border-radius: 3px;
  flex-shrink: 0;
}
.section-heading h2 {
  font-size: clamp(18px, 3vw, 24px);
  font-weight: 700;
  color: var(--text-main);
  margin: 0;
}

.section-divider {
  border: none;
  height: 1px;
  background: linear-gradient(to right, var(--border), transparent);
  margin: 32px 0;
}

/* =========================================
   PROFILE CARDS
   ========================================= */
.cards-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
  gap: 24px;
  margin-bottom: 40px;
}

/* Special single-card center layout */
.cards-grid.single {
  grid-template-columns: 310px;
  justify-content: center;
}

/* Two column layout for some pages */
.cards-grid.cols-2 {
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
}

.profile-card {
  background: var(--card-bg);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
  overflow: hidden;
  transition: transform var(--transition), box-shadow var(--transition), border-color var(--transition);
  border: 1px solid var(--border);
  display: flex;
  flex-direction: column;
}
.profile-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-md);
  border-color: rgba(242,101,34,.35);
}

.profile-card-img {
  position: relative;
  background: linear-gradient(160deg, #fff2eb 0%, #fbf5ef 100%);
  padding: 24px 24px 0;
  display: flex;
  justify-content: center;
  border-bottom: 1px solid rgba(242,101,34,.08);
}
.profile-card-img img {
  width: 140px;
  height: 196px;
  object-fit: cover;
  border-radius: var(--radius-md);
  box-shadow: 0 6px 18px rgba(0,0,0,.08);
  border: 3px solid #ffffff;
  display: block;
}
.profile-card-img .acting-badge {
  position: absolute;
  top: 14px; right: 14px;
  background: var(--secondary);
  color: #ffffff;
  font-size: 11px;
  font-weight: 600;
  padding: 3px 10px;
  border-radius: 20px;
  box-shadow: 0 2px 8px rgba(166,116,54,.25);
}

.profile-card-body {
  padding: 18px 20px 20px;
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: 6px;
}
.profile-card-position {
  font-size: 13px;
  font-weight: 600;
  color: var(--primary);
  text-transform: uppercase;
  letter-spacing: .5px;
  margin-bottom: 2px;
}
.profile-card-name {
  font-size: 16px;
  font-weight: 600;
  color: var(--text-main);
  line-height: 1.35;
}
.profile-card-dept {
  font-size: 13px;
  color: var(--neutral-gray);
  margin-top: 4px;
  line-height: 1.5;
}

.profile-card-contact {
  margin-top: 12px;
  display: flex;
  flex-direction: column;
  gap: 6px;
}
.contact-item {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  color: var(--neutral-gray);
}
.contact-item .icon {
  width: 28px; height: 28px;
  background: var(--primary-soft);
  color: var(--primary);
  border-radius: 7px;
  display: flex; align-items: center; justify-content: center;
  font-size: 14px;
  flex-shrink: 0;
}
.contact-item a {
  color: var(--neutral-gray);
  text-decoration: none;
  transition: color var(--transition);
}
.contact-item a:hover { color: var(--primary); }

.profile-card-departments {
  margin-top: 12px;
  background: var(--secondary-soft);
  border-radius: var(--radius-sm);
  border-left: 3px solid var(--secondary);
  padding: 10px 12px;
}
.profile-card-departments .dept-label {
  font-size: 12px;
  font-weight: 600;
  color: var(--secondary-dark);
  margin-bottom: 4px;
  text-transform: uppercase;
  letter-spacing: .5px;
}
.profile-card-departments .dept-content {
  font-size: 13px;
  color: var(--text-main);
  line-height: 1.6;
}

/* =========================================
   MAIN CONTENT WRAPPER
   ========================================= */
.board-main {
  min-height: calc(100vh - var(--nav-h) - 120px);
  padding-bottom: 60px;
}

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 20px;
}

/* =========================================
   FOOTER (นุ่มนวล ไม่มืดทึบ)
   ========================================= */
.board-footer {
  background: #2c2e33;
  border-top: 3px solid var(--primary);
  padding: 30px 20px;
  text-align: center;
  color: #9ea0a5;
  font-size: 13px;
}
.board-footer strong { color: #ffffff; }

/* =========================================
   BREADCRUMB
   ========================================= */
.breadcrumb-bar {
  background: #ffffff;
  border-bottom: 1px solid var(--border);
  padding: 10px 0;
}
.breadcrumb-inner {
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: 13px;
  color: var(--neutral-gray);
}
.breadcrumb-inner a {
  color: var(--primary);
  text-decoration: none;
  font-weight: 500;
}
.breadcrumb-inner a:hover { color: var(--primary-dark); text-decoration: underline; }
.breadcrumb-inner .sep { color: var(--border); }

/* =========================================
   RESPONSIVE
   ========================================= */
@media (max-width: 768px) {
  .cards-grid { grid-template-columns: repeat(auto-fill, minmax(160px, 1fr)); gap: 16px; }
  .cards-grid.single { grid-template-columns: 1fr; }
  .profile-card-img img { width: 120px; height: 168px; }
  .page-banner { padding: 36px 16px 32px; }
}

@media (max-width: 480px) {
  .cards-grid { grid-template-columns: repeat(2, 1fr); gap: 12px; }
  .profile-card-body { padding: 12px 14px 14px; }
  .profile-card-name { font-size: 14px; }
  .profile-card-img img { width: 100%; height: auto; aspect-ratio: 3/4; }
  .profile-card-img { padding: 16px 16px 0; }
}

/* =========================================
   UTILITIES
   ========================================= */
.text-center { text-align: center; }
.mt-0 { margin-top: 0; }