/* =========================================================
   TRÚC XINH — single-screen contact card
   Tokens
========================================================= */
:root{
  --bg: #08090d;
  --surface: rgba(255,255,255,0.035);
  --surface-hover: rgba(255,255,255,0.065);
  --border: rgba(255,255,255,0.09);
  --border-soft: rgba(255,255,255,0.06);

  --text: #eceef3;
  --text-dim: #9aa0b3;
  --text-faint: #5b6072;

  --accent: #7c93ff;
  --accent-soft: rgba(124,147,255,0.14);

  --font-display: 'Space Grotesk', 'Inter', sans-serif;
  --font-body: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
  --font-mono: 'JetBrains Mono', ui-monospace, SFMono-Regular, monospace;

  --radius-sm: 12px;
  --radius-lg: 24px;
}

*{ box-sizing: border-box; }

html, body{ height: 100%; }

@media (prefers-reduced-motion: reduce){
  *{ animation-duration: 0.01ms !important; animation-iteration-count: 1 !important; transition-duration: 0.01ms !important; }
}

body{
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-body);
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

a{ color: inherit; text-decoration: none; }
img{ max-width: 100%; display: block; }

::selection{ background: var(--accent-soft); color: var(--text); }

:focus-visible{
  outline: 2px solid var(--accent);
  outline-offset: 3px;
  border-radius: 4px;
}

/* ambient backdrop */
.grid-backdrop{
  position: fixed;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  background-image:
    linear-gradient(rgba(124,147,255,0.05) 1px, transparent 1px),
    linear-gradient(90deg, rgba(124,147,255,0.05) 1px, transparent 1px);
  background-size: 42px 42px;
  mask-image: radial-gradient(ellipse 70% 60% at 50% 40%, #000 0%, transparent 75%);
  -webkit-mask-image: radial-gradient(ellipse 70% 60% at 50% 40%, #000 0%, transparent 75%);
}
.scanline{
  position: fixed;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  background: radial-gradient(ellipse 60% 45% at 50% 30%, rgba(124,147,255,0.08), transparent 60%);
}

/* =========================================================
   Single screen layout
========================================================= */
.screen{
  position: relative;
  z-index: 1;
  min-height: 100svh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 28px 20px;
}

.reveal{
  opacity: 0;
  transform: translateY(12px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}
.reveal.is-visible{ opacity: 1; transform: translateY(0); }

.card{
  width: 100%;
  max-width: 400px;
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  padding: 36px 30px 26px;
  background: var(--surface);
  border: 1px solid var(--border-soft);
  border-radius: var(--radius-lg);
  backdrop-filter: blur(14px);
}

.status-line{
  display: inline-flex;
  align-items: center;
  gap: 7px;
  font-family: var(--font-mono);
  font-size: 11.5px;
  color: var(--text-faint);
  letter-spacing: 0.02em;
  margin-bottom: 20px;
  padding: 6px 13px;
  border: 1px solid var(--border-soft);
  border-radius: 999px;
}
.dot{
  width: 6px; height: 6px;
  border-radius: 50%;
  background: #4ade80;
  box-shadow: 0 0 0 3px rgba(74,222,128,0.15);
  flex-shrink: 0;
}

.avatar-wrap{
  position: relative;
  width: 76px;
  height: 76px;
  margin-bottom: 20px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.avatar-glow{
  position: absolute;
  inset: -14px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(124,147,255,0.35), transparent 70%);
  filter: blur(6px);
  animation: pulse-glow 3.2s ease-in-out infinite;
}

.avatar-ring{
  position: absolute;
  inset: -5px;
  border-radius: 22px;
  padding: 1.5px;
  background: conic-gradient(from 0deg, var(--accent), transparent 30%, transparent 70%, var(--accent) 100%);
  -webkit-mask: linear-gradient(#000 0 0) content-box, linear-gradient(#000 0 0);
  -webkit-mask-composite: xor;
  mask-composite: exclude;
  animation: spin 5s linear infinite;
}

.avatar{
  position: relative;
  width: 76px;
  height: 76px;
  border-radius: 18px;
  overflow: hidden;
  background: linear-gradient(155deg, var(--surface), rgba(124,147,255,0.08));
  border: 1px solid var(--border);
  z-index: 1;
}
.avatar img{
  width: 100%;
  height: 100%;
  object-fit: cover;
}

@keyframes spin{
  to{ transform: rotate(360deg); }
}
@keyframes pulse-glow{
  0%, 100%{ opacity: 0.55; transform: scale(0.94); }
  50%{ opacity: 1; transform: scale(1.05); }
}

@media (prefers-reduced-motion: reduce){
  .avatar-ring{ animation: none; }
  .avatar-glow{ animation: none; opacity: 0.7; }
}

.name{
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(1.9rem, 8vw, 2.4rem);
  letter-spacing: -0.02em;
  line-height: 1.05;
  margin: 0 0 10px;
}
.name span{ color: var(--accent); }

.role{
  font-family: var(--font-mono);
  font-size: 12.5px;
  color: var(--text-dim);
  margin: 0 0 12px;
}
.role .dash{ color: var(--text-faint); margin: 0 2px; }
.role a{ color: var(--accent); border-bottom: 1px solid transparent; transition: border-color 0.2s ease; }
.role a:hover{ border-color: var(--accent); }

.tagline{
  color: var(--text-dim);
  font-size: 0.92rem;
  margin: 0 0 26px;
  max-width: 320px;
}

/* =========================================================
   Contact list
========================================================= */
.contact-list{
  width: 100%;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.contact-card{
  display: flex;
  align-items: center;
  gap: 12px;
  width: 100%;
  padding: 13px 16px;
  background: rgba(255,255,255,0.02);
  border: 1px solid var(--border-soft);
  border-radius: var(--radius-sm);
  color: var(--text-dim);
  transition: border-color 0.2s ease, background 0.2s ease, transform 0.18s ease, color 0.2s ease;
}
a.contact-card:hover{
  border-color: rgba(124,147,255,0.4);
  background: var(--surface-hover);
  transform: translateY(-2px);
  color: var(--text);
}
.contact-card svg:first-child{ color: var(--accent); flex-shrink: 0; }

.contact-label{
  flex: 1;
  text-align: left;
  font-weight: 500;
  font-size: 0.92rem;
  color: var(--text);
}

.contact-arrow{
  color: var(--text-faint);
  flex-shrink: 0;
  transition: transform 0.2s ease, color 0.2s ease;
}
a.contact-card:hover .contact-arrow{
  color: var(--accent);
  transform: translate(1px, -1px);
}

.zalo-card{
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 14px;
  width: 100%;
  padding: 20px 16px 18px;
  background: rgba(255,255,255,0.02);
  border: 1px solid var(--border-soft);
  border-radius: var(--radius-sm);
}

.qr-frame{
  position: relative;
  width: 144px;
  height: 144px;
  padding: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
}
.qr-frame::before,
.qr-frame::after,
.qr-frame span{ content: ''; }

/* corner brackets — subtle "scan me" framing */
.qr-frame{
  --bracket: var(--accent);
}
.qr-frame::before{
  content: '';
  position: absolute;
  top: 0; left: 0;
  width: 16px; height: 16px;
  border-top: 2px solid var(--bracket);
  border-left: 2px solid var(--bracket);
  border-radius: 6px 0 0 0;
  opacity: 0.7;
}
.qr-frame::after{
  content: '';
  position: absolute;
  bottom: 0; right: 0;
  width: 16px; height: 16px;
  border-bottom: 2px solid var(--bracket);
  border-right: 2px solid var(--bracket);
  border-radius: 0 0 6px 0;
  opacity: 0.7;
}

.qr-img{
  width: 128px;
  height: 128px;
  object-fit: cover;
  border-radius: 10px;
  border: 1px solid var(--border);
  background: #fff;
  padding: 6px;
}

.zalo-text{
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 3px;
}
.zalo-text .contact-label{
  text-align: center;
  color: var(--text);
}
.zalo-sub{
  font-family: var(--font-mono);
  font-size: 11.5px;
  color: var(--text-faint);
  text-align: center;
}

.footer-line{
  margin: 26px 0 0;
  font-family: var(--font-mono);
  font-size: 10.5px;
  color: var(--text-faint);
  letter-spacing: 0.02em;
}

/* =========================================================
   Responsive
========================================================= */
@media (max-width: 400px){
  .card{ padding: 30px 22px 22px; }
}

@media (max-height: 700px){
  .screen{ align-items: flex-start; padding-top: 20px; }
}