@import url('https://fonts.googleapis.com/css2?family=Playfair+Display:wght@400;500&family=DM+Sans:ital,opsz,wght@0,9..40,300;0,9..40,400;0,9..40,500;1,9..40,300&display=swap');
 
/* VARIABLES */
:root {
  --bg:          #f8f7f4;
  --bg-white:    #ffffff;
  --bg-soft:     #f2f0eb;
  --ink:         #1a1a2e;
  --ink-2:       #4a4a6a;
  --ink-3:       #8888aa;
  --accent:      #2563eb;
  --accent-lt:   #eff4ff;
  --accent-2:    #0ea5e9;
  --gold:        #d4a853;
  --border:      #e4e2dc;
  --border-2:    #d0cdc6;
  --radius-sm:   8px;
  --radius:      16px;
  --radius-lg:   24px;
  --shadow-sm:   0 2px 8px rgba(26,26,46,0.06);
  --shadow:      0 8px 32px rgba(26,26,46,0.10);
  --ff-display:  'Playfair Display', Georgia, serif;
  --ff-body:     'DM Sans', sans-serif;
  --max-w:       860px;
}
 
/* RESET */
*, *::before, *::after { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; }
 
body {
  background: var(--bg);
  color: var(--ink);
  font-family: var(--ff-body);
  font-weight: 300;
  font-size: 15.5px;
  line-height: 1.75;
  min-height: 100vh;
  padding-bottom: 0;
}
 
/* thanh màu đầu trang */
body::before {
  content: '';
  display: block;
  height: 5px;
  background: linear-gradient(90deg, var(--accent) 0%, var(--accent-2) 55%, var(--gold) 100%);
}
h1 {
  font-family: var(--ff-display);
  font-size: clamp(2rem, 5vw, 3.2rem);
  font-weight: 500;
  color: var(--ink);
  text-align: center;
  padding: 64px 24px 8px;
  letter-spacing: -0.01em;
  animation: fadeDown 0.7s ease both;
}
h2 {
  font-family: var(--ff-body);
  font-size: 0.75rem;
  font-weight: 400;
  letter-spacing: 0.28em;
  text-transform: uppercase;
  color: var(--ink-3);
  text-align: center;
  margin-bottom: 52px;
  animation: fadeDown 0.7s 0.1s ease both;
}
h2::after {
  content: '';
  display: block;
  width: 32px;
  height: 2px;
  border-radius: 2px;
  background: linear-gradient(90deg, var(--accent), var(--accent-2));
  margin: 14px auto 0;
}
h3 {
  font-family: var(--ff-display);
  font-size: 1.25rem;
  font-weight: 400;
  color: var(--ink);
  letter-spacing: 0.01em;
}
table.avt {
  width: calc(100% - 48px);
  max-width: var(--max-w);
  border-collapse: collapse;
  background: var(--bg-white);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow);
  margin: 0 auto 28px;
  animation: fadeUp 0.7s 0.1s ease both;
}
 
table.avt td {
  padding: 40px 36px;
  vertical-align: middle;
}
table.avt td:first-child {
  width: 240px;
  text-align: center;
  background: linear-gradient(160deg, var(--accent-lt) 0%, #e0f2fe 100%);
  border-right: 1px solid var(--border);
  padding: 40px 28px;
  position: relative;
}
table.avt td:first-child::before {
  content: '';
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, calc(-50% - 22px));
  width: 178px;
  height: 178px;
  border-radius: 20px;
  background: linear-gradient(135deg, var(--accent), var(--accent-2), var(--gold), var(--accent));
  background-size: 300% 300%;
  animation: borderSpin 3s linear infinite;
  z-index: 0;
}
table.avt img {
  position: relative;
  z-index: 1;
  width: 162px;
  height: 162px;
  object-fit: cover;
  border-radius: 16px;
  border: 3px solid var(--bg-white);
  display: block;
  margin: 0 auto 18px;
  box-shadow: 0 8px 28px rgba(37,99,235,0.18);
  animation: avatarEntry 0.9s 0.2s ease both;
  transition: transform 0.35s ease, box-shadow 0.35s ease;
  cursor: pointer;
}
table.avt img:hover {
  transform: scale(1.03);
  box-shadow: 0 12px 36px rgba(37,99,235,0.25);
}
table.avt img.clicked {
  animation: avatarEntry 0.9s ease both,
             avatarFloat 3.5s 0.2s ease-in-out infinite,
             borderGlow  2s   0.2s ease-in-out infinite alternate;
  transform-origin: center;
}
@keyframes borderGlow {
  from { box-shadow: 0 8px 28px rgba(37,99,235,0.20); }
  to   { box-shadow: 0 0 0 6px rgba(14,165,233,0.25), 0 16px 48px rgba(37,99,235,0.40); }
}
table.avt td:first-child::after {
  content: 'IT Student';
  position: relative;
  z-index: 1;
  display: block;
  font-size: 0.7rem;
  font-weight: 500;
  letter-spacing: 0.1em;
  color: var(--accent);
  background: var(--accent-lt);
  border: 1px solid rgba(37,99,235,0.2);
  border-radius: 20px;
  padding: 4px 14px;
  width: fit-content;
  margin: 0 auto;
}
@keyframes borderSpin {
  0%   { background-position: 0% 50%; }
  50%  { background-position: 100% 50%; }
  100% { background-position: 0% 50%; }
}
@keyframes avatarEntry {
  from { opacity: 0; transform: scale(0.82) translateY(14px); }
  to   { opacity: 1; transform: scale(1) translateY(0); }
}
@keyframes avatarFloat {
  0%, 100% { transform: translateY(0px); }
  50%       { transform: translateY(-5px); }
}
table.avt p {
  color: var(--ink-2);
  line-height: 1.85;
  font-size: 15px;
}
table.avt b {
  color: var(--ink);
  font-weight: 500;
}
 
table.avt h3 { margin-bottom: 12px; }
 
table.TT {
  width: calc(100% - 48px);
  max-width: var(--max-w);
  border-collapse: collapse;
  background: var(--bg-white);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow);
  margin: 0 auto 28px;
  animation: fadeUp 0.7s 0.2s ease both;
}
 
table.TT caption {
  font-family: var(--ff-display);
  font-size: 1.1rem;
  font-weight: 500;
  color: var(--ink);
  padding: 28px 32px 0;
  caption-side: top;
  text-align: left;
}
 
table.TT caption::after {
  content: '';
  display: block;
  height: 1px;
  background: var(--border);
  margin-top: 16px;
}
 
table.TT th {
  font-size: 0.68rem;
  font-weight: 500;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--ink-3);
  padding: 14px 32px;
  background: var(--bg-soft);
  text-align: left;
  border-bottom: 1px solid var(--border);
}
 
table.TT td {
  padding: 15px 32px;
  border-bottom: 1px solid var(--border);
  color: var(--ink-2);
  font-size: 15px;
}
 
table.TT tr:last-child td { border-bottom: none; }
 
table.TT td:first-child {
  color: var(--ink-3);
  font-size: 0.82rem;
  letter-spacing: 0.05em;
  width: 38%;
}
 
table.TT tr:hover td {
  background: var(--accent-lt);
  transition: background 0.25s;
}
 
ul[style*="list-style-type:none"] {
  list-style: none !important;
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 10px;
  max-width: var(--max-w);
  width: calc(100% - 48px);
  padding: 0;
  margin: 0 auto 36px;
  animation: fadeUp 0.7s 0.3s ease both;
}
 
ul[style*="list-style-type:none"] button {
  background: var(--bg-white);
  border: 1px solid var(--border-2);
  border-radius: 40px;
  padding: 10px 24px;
  color: var(--ink-2);
  font-family: var(--ff-body);
  font-size: 0.82rem;
  font-weight: 400;
  letter-spacing: 0.06em;
  cursor: pointer;
  transition: all 0.25s ease;
  box-shadow: var(--shadow-sm);
}
 
ul[style*="list-style-type:none"] button:hover {
  background: var(--accent);
  border-color: var(--accent);
  color: #fff;
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(37,99,235,0.28);
}
 
ul[style*="list-style-type:none"] button li { pointer-events: none; }

center { display: none; }
#Login  { display: none; }
 
body > h3 {
  max-width: var(--max-w);
  width: calc(100% - 48px);
  margin: 0 auto 14px;
  padding-bottom: 10px;
  border-bottom: 1px solid var(--border);
  animation: fadeUp 0.7s 0.4s ease both;
}
 
body > p {
  max-width: var(--max-w);
  width: calc(100% - 48px);
  margin: 0 auto 8px;
  color: var(--ink-2);
  font-size: 14.5px;
  animation: fadeUp 0.7s 0.42s ease both;
}
 
body > p a {
  color: var(--accent);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: border-color 0.2s, opacity 0.2s;
}
 
body > p a:hover {
  border-bottom-color: var(--accent);
  opacity: 0.75;
}
 
footer {
  margin-top: 64px;
  background: var(--ink) !important;
}
footer p {
  background: transparent !important;
  color: rgba(255,255,255,0.4) !important;
  text-align: center !important;
  font-size: 0.72rem !important;
  letter-spacing: 0.18em;
  padding: 26px 20px !important;
  margin: 0 !important;
}
@keyframes fadeDown {
  from { opacity: 0; transform: translateY(-16px); }
  to   { opacity: 1; transform: translateY(0); }
}
@keyframes fadeUp {
  from { opacity: 0; transform: translateY(22px); }
  to   { opacity: 1; transform: translateY(0); }
}
@media (max-width: 640px) {
  table.avt, table.avt tbody, table.avt tr { display: block; }
  table.avt td {
    border-right: none !important;
    border-bottom: 1px solid var(--border);
    padding: 28px 24px;
    width: 100% !important;
  }
  table.TT th, table.TT td { padding: 13px 20px; }
  table.TT caption { padding: 20px 20px 0; }
  h1 { padding-top: 44px; }
}