/* ============================================================
   LONG LANH — Cánh cửa vào Hệ sinh thái
   Tối giản · Lung linh · Mục tiêu duy nhất: dẫn click vào 3 nền tảng.
   ============================================================ */

@font-face{font-family:'Playfair Display';font-display:swap}
@font-face{font-family:'Be Vietnam Pro';font-display:swap}

:root{
  --teal-950:#061a16;
  --teal-900:#0a2722;
  --teal-850:#0c302a;
  --teal-800:#0e3a31;
  --teal-700:#134d42;
  --teal-600:#1a6354;
  --teal-500:#2f7565;
  --teal-400:#4f9b86;

  --gold-700:#9a7338;
  --gold-600:#b58a45;
  --gold-500:#c9a05c;
  --gold-400:#dcb978;
  --gold-300:#ecca85;
  --gold-200:#f4dca2;

  --paper:#fdfbf5;
  --paper-soft:rgba(232,238,234,.74);
  --paper-mute:rgba(232,238,234,.54);

  --ff-display:'Playfair Display',Georgia,serif;
  --ff-body:'Be Vietnam Pro',system-ui,-apple-system,Segoe UI,sans-serif;
  --ease:cubic-bezier(.21,.7,.22,1);
  --r-card:24px;
}

/* ---------- reset / base ---------- */
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
html{-webkit-text-size-adjust:100%;overflow-x:hidden}
body{
  font-family:var(--ff-body);
  color:var(--paper);
  font-weight:400;line-height:1.65;
  -webkit-font-smoothing:antialiased;
  min-height:100svh;min-height:100dvh;
  background:
    radial-gradient(110% 80% at 50% 0%, rgba(47,117,101,.42), transparent 62%),
    radial-gradient(110% 90% at 50% 100%, rgba(19,77,66,.5), transparent 65%),
    linear-gradient(180deg, var(--teal-900) 0%, var(--teal-950) 100%);
}
img{max-width:100%;display:block;height:auto}
a{color:inherit;text-decoration:none}
h1,h2,h3{font-family:var(--ff-display);font-weight:600;line-height:1.22;letter-spacing:-.01em}
button{font-family:inherit;cursor:pointer;border:none;background:none}
::selection{background:var(--gold-500);color:var(--teal-950)}
:focus-visible{outline:2.5px solid var(--gold-500);outline-offset:3px;border-radius:6px}

/* ---------- ambient layers ---------- */
body::after{
  content:"";position:fixed;inset:0;z-index:9000;pointer-events:none;opacity:.025;
  background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='200' height='200'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.82' numOctaves='3'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
}
#stars{position:fixed;inset:0;width:100%;height:100%;z-index:0;pointer-events:none}
.page-glow{position:fixed;border-radius:50%;filter:blur(95px);pointer-events:none;z-index:0;opacity:.55}
.page-glow-1{
  width:600px;height:600px;top:-200px;left:-150px;
  background:radial-gradient(circle,rgba(47,117,101,.58),transparent 65%);
}
.page-glow-2{
  width:600px;height:600px;bottom:-220px;right:-150px;
  background:radial-gradient(circle,rgba(201,160,92,.46),transparent 65%);
}

/* ---------- portal layout ---------- */
.portal{
  position:relative;z-index:2;
  display:flex;flex-direction:column;align-items:center;
  min-height:100svh;min-height:100dvh;
  padding:clamp(48px,6vw,72px) clamp(20px,3vw,32px) clamp(28px,3vw,40px);
  max-width:1180px;margin:0 auto;
}

/* ---------- head: emblem + brand ---------- */
.portal-head{
  text-align:center;display:flex;flex-direction:column;align-items:center;
  margin-bottom:clamp(38px,5vw,64px);
  opacity:0;animation:fadeUp 1s var(--ease) .1s forwards;
}

.emblem-wrap{
  position:relative;width:clamp(170px,18vw,220px);aspect-ratio:1;
  margin:0 auto 18px;display:grid;place-items:center;
}
.emblem-logo{
  width:78%;position:relative;z-index:3;
  filter:drop-shadow(0 16px 38px rgba(0,0,0,.5)) drop-shadow(0 0 30px rgba(201,160,92,.35));
  animation:floaty 7s ease-in-out infinite;
}
.emblem-halo{
  position:absolute;width:90%;aspect-ratio:1;border-radius:50%;z-index:1;
  background:radial-gradient(circle,rgba(201,160,92,.38),rgba(47,117,101,.18) 55%,transparent 72%);
  animation:pulse 6s ease-in-out infinite;
}
.ring-dash{
  position:absolute;width:100%;aspect-ratio:1;border-radius:50%;z-index:2;
  border:1.5px dashed rgba(236,202,133,.42);
  animation:spin 60s linear infinite;
}
.float-spark{
  position:absolute;color:var(--gold-300);z-index:3;
  text-shadow:0 0 12px rgba(236,202,133,.75);
}
.float-spark.s1{top:6%;right:6%;font-size:1.3rem;animation:twinkle 3.4s ease-in-out infinite}
.float-spark.s2{bottom:8%;left:2%;font-size:1rem;animation:twinkle 2.8s .6s ease-in-out infinite}
.float-spark.s3{bottom:26%;right:-4%;font-size:.85rem;animation:twinkle 3.9s 1.1s ease-in-out infinite}

.brand-name{
  font-size:clamp(2.1rem,4vw,2.95rem);
  font-weight:600;letter-spacing:.05em;
  background:linear-gradient(140deg,var(--gold-200),var(--gold-300) 45%,var(--gold-400));
  -webkit-background-clip:text;background-clip:text;color:transparent;
  margin:0 0 14px;
}
.brand-tag{
  font-size:.76rem;letter-spacing:.28em;text-transform:uppercase;
  color:var(--paper-mute);font-weight:500;
  display:inline-flex;align-items:center;gap:.85em;
}
.brand-tag::before,.brand-tag::after{
  content:"";width:28px;height:1px;
  background:linear-gradient(90deg,transparent,rgba(236,202,133,.55));
}
.brand-tag::after{background:linear-gradient(90deg,rgba(236,202,133,.55),transparent)}

/* ---------- doors ---------- */
.doors{
  width:100%;max-width:1100px;
  display:grid;grid-template-columns:repeat(3,1fr);gap:24px;
}
.door{
  position:relative;isolation:isolate;
  display:flex;flex-direction:column;align-items:center;text-align:center;
  padding:clamp(40px,4vw,56px) clamp(22px,2.5vw,32px) clamp(28px,3vw,36px);
  border-radius:var(--r-card);
  background:
    linear-gradient(170deg,rgba(255,255,255,.045),rgba(255,255,255,.005)),
    rgba(10,39,34,.42);
  border:1px solid rgba(201,160,92,.2);
  backdrop-filter:blur(6px);-webkit-backdrop-filter:blur(6px);
  transition:transform .55s var(--ease),border-color .55s var(--ease),box-shadow .55s var(--ease);
  overflow:hidden;
  opacity:0;transform:translateY(22px);
  animation:doorIn .9s var(--ease) forwards;
}
.door:nth-child(1){animation-delay:.32s}
.door:nth-child(2){animation-delay:.5s}
.door:nth-child(3){animation-delay:.68s}

.door-glow{
  position:absolute;inset:-32% -28%;z-index:-1;pointer-events:none;
  background:radial-gradient(50% 50% at 50% 32%, rgba(var(--accent),.7), transparent 62%);
  opacity:.24;filter:blur(38px);
  transition:opacity .6s var(--ease),transform .6s var(--ease);
}
.door-shine{
  position:absolute;inset:0;pointer-events:none;z-index:0;
  background:linear-gradient(115deg,transparent 30%,rgba(255,255,255,.08) 50%,transparent 70%);
  transform:translateX(-110%);
  transition:transform 1s var(--ease);
}
.door:hover,.door:focus-visible{
  transform:translateY(-10px);
  border-color:rgba(236,202,133,.5);
  box-shadow:
    0 30px 60px -28px rgba(0,0,0,.65),
    0 0 0 1px rgba(201,160,92,.18);
}
.door:hover .door-glow,.door:focus-visible .door-glow{opacity:.58;transform:scale(1.06)}
.door:hover .door-shine,.door:focus-visible .door-shine{transform:translateX(110%)}

.door-icon{
  position:relative;
  width:clamp(78px,8vw,96px);aspect-ratio:1;border-radius:50%;
  display:grid;place-items:center;color:var(--paper);
  background:
    radial-gradient(circle at 35% 30%, rgba(255,255,255,.15), transparent 60%),
    linear-gradient(140deg, rgba(var(--accent),.95), rgba(19,77,66,.65));
  box-shadow:
    inset 0 0 0 1px rgba(236,202,133,.22),
    0 14px 30px -10px rgba(var(--accent),.6),
    0 0 32px -4px rgba(var(--accent),.45);
  margin-bottom:clamp(22px,2.6vw,30px);
  transition:transform .55s var(--ease),box-shadow .55s var(--ease);
}
.door-icon::before{
  content:"";position:absolute;inset:-10px;border-radius:50%;
  border:1px dashed rgba(236,202,133,.3);
  animation:spin 28s linear infinite;
}
.door-icon svg{width:48%;aspect-ratio:1;filter:drop-shadow(0 1px 4px rgba(0,0,0,.35))}
.door:hover .door-icon,.door:focus-visible .door-icon{
  transform:scale(1.06);
  box-shadow:
    inset 0 0 0 1px rgba(236,202,133,.4),
    0 18px 36px -10px rgba(var(--accent),.75),
    0 0 42px -4px rgba(var(--accent),.6);
}

.door-body{display:flex;flex-direction:column;align-items:center}
.door-name{
  font-family:var(--ff-display);
  font-size:clamp(1.6rem,2.05vw,1.9rem);
  font-weight:600;color:var(--paper);
  margin:0 0 10px;letter-spacing:.005em;
}
.door-tag{
  font-size:.97rem;color:var(--paper-soft);font-weight:300;
  max-width:280px;margin:0 auto clamp(22px,2.6vw,30px);
  line-height:1.55;
}

.door-arrow{
  display:inline-flex;align-items:center;gap:.55em;
  font-size:.78rem;letter-spacing:.22em;text-transform:uppercase;font-weight:600;
  color:var(--gold-300);
  transition:gap .35s var(--ease),color .35s var(--ease),letter-spacing .35s var(--ease);
}
.door-arrow svg{width:18px;height:18px;transition:transform .35s var(--ease)}
.door:hover .door-arrow,.door:focus-visible .door-arrow{
  gap:.85em;color:var(--gold-200);letter-spacing:.26em;
}
.door:hover .door-arrow svg,.door:focus-visible .door-arrow svg{transform:translateX(4px)}

/* ---------- footer ---------- */
.portal-foot{
  margin-top:auto;padding-top:clamp(36px,5vw,60px);
  text-align:center;font-size:.84rem;color:var(--paper-mute);
  opacity:0;animation:fadeIn 1s var(--ease) 1s forwards;
}
.portal-foot a{color:var(--gold-400);transition:color .25s}
.portal-foot a:hover{color:var(--gold-300)}

/* ---------- WordPress admin bar offset ---------- */
.admin-bar .portal{padding-top:88px}
@media (max-width:782px){.admin-bar .portal{padding-top:102px}}

/* ---------- keyframes ---------- */
@keyframes floaty{0%,100%{transform:translateY(0)}50%{transform:translateY(-14px)}}
@keyframes pulse{0%,100%{transform:scale(1);opacity:.85}50%{transform:scale(1.08);opacity:1}}
@keyframes spin{to{transform:rotate(360deg)}}
@keyframes twinkle{0%,100%{opacity:.25;transform:scale(.8)}50%{opacity:1;transform:scale(1.15)}}
@keyframes doorIn{to{opacity:1;transform:none}}
@keyframes fadeIn{to{opacity:1}}
@keyframes fadeUp{from{opacity:0;transform:translateY(20px)}to{opacity:1;transform:none}}

/* ---------- responsive ---------- */
@media (max-width:880px){
  .doors{
    grid-template-columns:1fr;gap:16px;max-width:540px;
  }
  .door{
    flex-direction:row;text-align:left;align-items:center;
    padding:22px 22px;gap:18px;
  }
  .door-icon{margin-bottom:0;flex-shrink:0;width:66px}
  .door-icon svg{width:48%}
  .door-body{align-items:flex-start;flex:1;min-width:0}
  .door-name{font-size:1.32rem;margin-bottom:3px}
  .door-tag{font-size:.9rem;margin:0;max-width:none}
  .door-arrow{margin-left:auto;padding-left:10px}
  .door-arrow-text{display:none}
}

@media (max-width:520px){
  .portal{padding:32px 18px 22px}
  .emblem-wrap{width:148px}
  .brand-name{margin-bottom:10px}
  .brand-tag{font-size:.7rem;letter-spacing:.22em}
  .brand-tag::before,.brand-tag::after{width:18px}
  .door{padding:20px 18px;gap:16px;border-radius:18px}
  .door-icon{width:58px}
  .door-icon svg{width:50%}
  .door-name{font-size:1.2rem}
  .door-tag{font-size:.88rem;line-height:1.5}
  .door-arrow svg{width:18px;height:18px}
}

/* ---------- reduced motion ---------- */
@media (prefers-reduced-motion:reduce){
  *,*::before,*::after{
    animation-duration:.001ms!important;animation-iteration-count:1!important;
    transition-duration:.001ms!important;
  }
  .portal-head,.portal-foot,.door{opacity:1!important;transform:none!important}
}