/*
Theme Name: BitcoinVN Portal
Theme URI: https://bitcoinvn.org/
Author: OpenAI
Author URI: https://openai.com/
Description: BitcoinVN 越南入口信息站主题。默认越南语，英文目录 /en/，自动创建页面，适合做正式信息站，不冒充官方主站。
Version: 1.0.2
Text Domain: bitcoinvn-portal
*/

:root{
  --bg:#f7f8fa;
  --card:#ffffff;
  --text:#111827;
  --muted:#6b7280;
  --line:#e5e7eb;
  --line-soft:#eef2f7;
  --accent:#f7931a;
  --accent-2:#fb923c;
  --accent-dark:#d97706;
  --dark:#0f172a;
  --dark-2:#1e293b;
  --success:#0f9d58;
  --hero-soft:#fff8ef;
  --hero-line:#fde7c1;
  --shadow:0 10px 30px rgba(2, 8, 23, .08);
  --shadow-soft:0 8px 20px rgba(15,23,42,.05);
  --radius:18px;
  --radius-lg:26px;
  --container:1180px;
}

*{box-sizing:border-box}

html{
  scroll-behavior:smooth;
}

body{
  margin:0;
  font-family:-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,Arial,sans-serif;
  color:var(--text);
  background:var(--bg);
  line-height:1.7;
  -webkit-font-smoothing:antialiased;
  -moz-osx-font-smoothing:grayscale;
}

img{
  max-width:100%;
  height:auto;
  display:block;
}

a{
  color:var(--accent-dark);
  text-decoration:none;
}

a:hover{
  color:var(--accent);
  text-decoration:none;
}

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

.screen-reader-text{
  position:absolute!important;
  clip:rect(1px,1px,1px,1px);
  padding:0!important;
  border:0!important;
  height:1px!important;
  width:1px!important;
  overflow:hidden;
}

.site-wrap{
  min-height:100vh;
  display:flex;
  flex-direction:column;
}

.site-main{
  flex:1 1 auto;
}

/* =========================
   Header final refined
   ========================= */
.site-header{
  position:sticky;
  top:0;
  z-index:1000;
  background:rgba(255,255,255,.95);
  backdrop-filter:blur(14px);
  border-bottom:1px solid rgba(229,231,235,.92);
  box-shadow:0 8px 24px rgba(15,23,42,.04);
}

.header-inner{
  display:grid;
  grid-template-columns:auto 1fr auto;
  align-items:center;
  gap:22px;
  min-height:84px;
  padding:12px 0;
}

/* =========================
   Branding / logo fixed
   ========================= */
.branding{
  display:flex;
  align-items:center;
  gap:14px;
  min-width:0;
  flex:0 0 auto;
}

.branding-logo{
  display:flex;
  align-items:center;
  justify-content:center;
  width:56px;
  height:56px;
  flex:0 0 56px;
  border-radius:14px;
  overflow:hidden;
  background:transparent;
}

.branding-logo a,
.custom-logo-link{
  display:flex;
  align-items:center;
  justify-content:center;
  width:56px;
  height:56px;
  overflow:hidden;
}

.branding-logo img,
.custom-logo{
  display:block;
  width:56px !important;
  height:56px !important;
  max-width:56px !important;
  max-height:56px !important;
  object-fit:contain !important;
  border-radius:0;
}

.branding-text{
  min-width:0;
}

.site-title{
  margin:0;
  font-size:1.12rem;
  line-height:1.2;
  font-weight:800;
}

.site-title a{
  color:var(--dark);
}

.site-title a:hover{
  color:var(--accent-dark);
}

.site-tagline{
  margin:4px 0 0;
  font-size:.88rem;
  color:var(--muted);
  line-height:1.35;
  white-space:nowrap;
}

/* =========================
   Nav area refined
   ========================= */
.primary-nav-wrap{
  display:flex;
  align-items:center;
  justify-content:center;
  min-width:0;
}

.primary-nav{
  display:flex;
  align-items:center;
  justify-content:center;
  padding:6px;
  border-radius:999px;
  background:rgba(248,250,252,.94);
  border:1px solid rgba(226,232,240,.95);
  box-shadow:var(--shadow-soft);
  max-width:100%;
}

.primary-nav ul{
  list-style:none;
  margin:0;
  padding:0;
  display:flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  flex-wrap:wrap;
}

.primary-nav li{
  margin:0;
}

.primary-nav a{
  position:relative;
  display:inline-flex;
  align-items:center;
  justify-content:center;
  min-height:44px;
  padding:0 16px;
  border-radius:999px;
  color:var(--dark);
  font-weight:700;
  font-size:.96rem;
  letter-spacing:.01em;
  line-height:1;
  white-space:nowrap;
  transition:all .22s ease;
  border:1px solid transparent;
}

.primary-nav a:hover{
  background:#fff7ed;
  border-color:#fed7aa;
  color:var(--accent-dark);
  transform:translateY(-1px);
}

.primary-nav .current-menu-item > a,
.primary-nav .current_page_item > a{
  background:linear-gradient(135deg, var(--accent) 0%, var(--accent-2) 100%);
  color:#fff;
  border-color:transparent;
  box-shadow:0 10px 22px rgba(247,147,26,.28);
}

.primary-nav .current-menu-item > a:hover,
.primary-nav .current_page_item > a:hover{
  color:#fff;
  border-color:transparent;
}

/* =========================
   Right side controls
   ========================= */
.header-right{
  display:flex;
  align-items:center;
  justify-content:flex-end;
  gap:12px;
  flex:0 0 auto;
}

.lang-switch,
.mobile-lang-switch{
  display:flex;
  align-items:center;
  gap:10px;
  flex-wrap:wrap;
}

.lang-switch{
  padding:4px;
  border-radius:999px;
  background:rgba(248,250,252,.94);
  border:1px solid rgba(226,232,240,.95);
  box-shadow:var(--shadow-soft);
}

.lang-btn{
  display:inline-flex;
  align-items:center;
  gap:10px;
  min-height:42px;
  padding:0 14px 0 12px;
  border-radius:999px;
  border:1px solid var(--line);
  background:#fff;
  color:var(--dark);
  font-weight:800;
  font-size:.92rem;
  line-height:1;
  white-space:nowrap;
  transition:all .22s ease;
  box-shadow:0 4px 14px rgba(15,23,42,.05);
}

.lang-btn:hover{
  border-color:#fdba74;
  background:#fffaf5;
  color:var(--accent-dark);
  transform:translateY(-1px);
}

.lang-btn.active{
  background:linear-gradient(135deg, #fff7ed 0%, #ffedd5 100%);
  border-color:#fdba74;
  color:var(--accent-dark);
  box-shadow:0 8px 18px rgba(247,147,26,.12);
}

.lang-flag{
  width:22px;
  height:22px;
  border-radius:50%;
  object-fit:cover;
  box-shadow:0 0 0 1px rgba(0,0,0,.06);
  flex:0 0 22px;
}

.lang-text{
  display:inline-flex;
  align-items:center;
  white-space:nowrap;
}

/* =========================
   Hamburger refined
   ========================= */
.menu-toggle{
  display:none;
  width:46px;
  height:46px;
  border-radius:14px;
  border:1px solid var(--line);
  background:#fff;
  cursor:pointer;
  align-items:center;
  justify-content:center;
  padding:0;
  position:relative;
  box-shadow:0 4px 14px rgba(15,23,42,.05);
}

.menu-toggle:hover{
  border-color:#fdba74;
  background:#fffaf5;
}

.menu-toggle span,
.menu-toggle::before,
.menu-toggle::after{
  content:"";
  position:absolute;
  width:20px;
  height:2px;
  background:var(--dark);
  border-radius:999px;
  transition:.25s ease;
}

.menu-toggle span{transform:translateY(0)}
.menu-toggle::before{transform:translateY(-7px)}
.menu-toggle::after{transform:translateY(7px)}
.menu-toggle.is-active span{opacity:0}
.menu-toggle.is-active::before{transform:rotate(45deg)}
.menu-toggle.is-active::after{transform:rotate(-45deg)}

/* =========================
   Hero
   ========================= */
.hero{
  padding:42px 0 20px;
}

.hero-grid{
  display:grid;
  grid-template-columns:1.12fr .88fr;
  gap:26px;
  align-items:stretch;
}

.hero-card{
  background:linear-gradient(135deg, var(--hero-soft) 0%, #ffffff 60%, #ffffff 100%);
  border:1px solid var(--hero-line);
  border-radius:28px;
  padding:34px;
  box-shadow:var(--shadow);
}

.hero-badges{
  display:flex;
  flex-wrap:wrap;
  gap:10px;
  margin-bottom:16px;
}

.badge{
  display:inline-flex;
  align-items:center;
  gap:8px;
  padding:8px 14px;
  border-radius:999px;
  background:#fff;
  border:1px solid var(--hero-line);
  font-size:.88rem;
  color:var(--accent-dark);
  font-weight:700;
}

.hero h1{
  margin:0 0 14px;
  font-size:2.45rem;
  line-height:1.18;
  color:var(--dark);
  letter-spacing:-0.02em;
}

.hero p.lead{
  margin:0 0 20px;
  font-size:1.05rem;
  color:#374151;
}

.hero-actions{
  display:flex;
  flex-wrap:wrap;
  gap:12px;
  margin:22px 0 18px;
}

.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  min-height:48px;
  padding:0 18px;
  border-radius:14px;
  border:1px solid transparent;
  font-weight:700;
  transition:.2s ease;
  cursor:pointer;
}

.btn-primary{
  background:linear-gradient(135deg, var(--accent) 0%, var(--accent-2) 100%);
  color:#fff;
  box-shadow:0 10px 22px rgba(247,147,26,.24);
}

.btn-primary:hover{
  background:linear-gradient(135deg, var(--accent-dark) 0%, #ea7a13 100%);
  color:#fff;
  transform:translateY(-1px);
}

.btn-secondary{
  background:#fff;
  color:var(--dark);
  border-color:var(--line);
}

.btn-secondary:hover{
  border-color:var(--accent);
  color:var(--accent-dark);
  transform:translateY(-1px);
}

.hero-meta{
  display:grid;
  grid-template-columns:repeat(3,1fr);
  gap:14px;
  margin-top:18px;
}

.meta-box{
  background:#fff;
  border:1px solid var(--line);
  border-radius:18px;
  padding:16px;
  box-shadow:0 2px 10px rgba(15,23,42,.03);
}

.meta-box strong{
  display:block;
  font-size:1.02rem;
  color:var(--dark);
  line-height:1.3;
}

.meta-box span{
  display:block;
  font-size:.92rem;
  color:var(--muted);
  margin-top:4px;
  line-height:1.5;
}

.hero-aside{
  background:#fff;
  border:1px solid var(--line);
  border-radius:28px;
  padding:24px;
  box-shadow:var(--shadow);
}

.hero-aside img{
  width:100%;
  border-radius:22px;
  object-fit:cover;
}

.hero-note{
  margin-top:16px;
  padding:16px 18px;
  border-radius:18px;
  background:#f8fafc;
  border:1px solid var(--line);
  color:#334155;
  font-size:.96rem;
  line-height:1.6;
}

.hero-note strong{
  color:var(--dark);
}

/* =========================
   Sections / cards
   ========================= */
.section{
  padding:18px 0 10px;
}

.section-title{
  margin:0 0 14px;
  font-size:1.8rem;
  line-height:1.25;
  color:var(--dark);
  letter-spacing:-0.02em;
}

.section-intro{
  margin:0 0 24px;
  color:var(--muted);
  font-size:1rem;
}

.card-grid{
  display:grid;
  grid-template-columns:repeat(3,1fr);
  gap:20px;
}

.info-card,
.content-card,
.sidebar-card,
.page-card{
  background:var(--card);
  border:1px solid var(--line);
  border-radius:var(--radius);
  box-shadow:var(--shadow);
}

.info-card{
  padding:22px;
}

.info-card h3{
  margin:0 0 10px;
  font-size:1.14rem;
  line-height:1.35;
  color:var(--dark);
}

.info-card p{
  margin:0;
  color:#4b5563;
}

.card-link{
  margin-top:14px;
  display:inline-flex;
  align-items:center;
  font-weight:700;
}

.quick-links{
  display:grid;
  grid-template-columns:repeat(4,1fr);
  gap:14px;
}

.quick-link{
  background:#fff;
  border:1px solid var(--line);
  border-radius:18px;
  padding:18px;
  box-shadow:var(--shadow);
}

.quick-link h3{
  margin:0 0 8px;
  font-size:1.05rem;
  color:var(--dark);
}

.quick-link p{
  margin:0;
  color:var(--muted);
  font-size:.95rem;
}

/* =========================
   Page / content
   ========================= */
.page-wrap{
  padding:30px 0 44px;
}

.page-grid{
  display:grid;
  grid-template-columns:minmax(0,1fr) 320px;
  gap:24px;
}

.page-card{
  padding:26px;
}

.content-card{
  padding:28px;
}

.sidebar-card{
  padding:22px;
}

.page-intro{
  margin:10px 0 0;
  color:var(--muted);
  line-height:1.7;
}

.entry-content > *:first-child{
  margin-top:0;
}

.entry-content h1,
.entry-content h2,
.entry-content h3,
.entry-content h4{
  color:var(--dark);
  line-height:1.3;
}

.entry-content h2{
  margin-top:30px;
  margin-bottom:12px;
  font-size:1.6rem;
  letter-spacing:-0.015em;
}

.entry-content h3{
  margin-top:24px;
  margin-bottom:10px;
  font-size:1.2rem;
}

.entry-content h4{
  margin-top:22px;
  margin-bottom:8px;
  font-size:1.05rem;
}

.entry-content p,
.entry-content li{
  color:#374151;
}

.entry-content ul,
.entry-content ol{
  padding-left:22px;
}

.entry-content blockquote{
  margin:18px 0;
  padding:16px 18px;
  border-left:4px solid var(--accent);
  background:#fff8ef;
  border-radius:12px;
  color:#374151;
}

.entry-content table{
  width:100%;
  border-collapse:collapse;
  margin:18px 0;
  background:#fff;
  overflow:hidden;
}

.entry-content th,
.entry-content td{
  border:1px solid var(--line);
  padding:12px 14px;
  text-align:left;
  vertical-align:top;
}

.entry-content th{
  background:#fff8ef;
  color:var(--dark);
}

.notice-box{
  margin:18px 0;
  padding:16px 18px;
  border-radius:16px;
  background:#fff8ef;
  border:1px solid var(--hero-line);
}

.notice-box strong{
  color:var(--accent-dark);
}

/* =========================
   Breadcrumbs
   ========================= */
.breadcrumbs{
  display:flex;
  flex-wrap:wrap;
  gap:8px;
  margin-bottom:14px;
  color:var(--muted);
  font-size:.94rem;
}

.breadcrumbs a{
  color:var(--muted);
}

.breadcrumbs a:hover{
  color:var(--accent-dark);
}

/* =========================
   Sidebar
   ========================= */
.sidebar-card h3{
  margin:0 0 12px;
  font-size:1.06rem;
  color:var(--dark);
}

.sidebar-card p{
  margin:0;
  color:#4b5563;
}

.sidebar-card ul{
  list-style:none;
  margin:0;
  padding:0;
}

.sidebar-card li + li{
  margin-top:10px;
}

.sidebar-card a{
  display:block;
  padding:10px 12px;
  border-radius:12px;
  color:var(--dark);
  background:#f8fafc;
  transition:.2s ease;
}

.sidebar-card a:hover{
  background:#fff4e5;
  color:var(--accent-dark);
  transform:translateX(2px);
}

/* =========================
   Posts / archive
   ========================= */
.post-list{
  display:grid;
  gap:18px;
}

.post-card{
  padding:24px;
  background:#fff;
  border:1px solid var(--line);
  border-radius:var(--radius);
  box-shadow:var(--shadow);
}

.post-card h2{
  margin:0 0 8px;
  font-size:1.4rem;
  line-height:1.3;
}

.post-card h2 a{
  color:var(--dark);
}

.post-card h2 a:hover{
  color:var(--accent-dark);
}

.post-meta{
  color:var(--muted);
  font-size:.92rem;
  margin-bottom:12px;
}

.navigation,
.nav-links,
.pagination{
  display:flex;
  flex-wrap:wrap;
  gap:10px;
  align-items:center;
}

.page-numbers{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  min-width:42px;
  min-height:42px;
  padding:0 12px;
  background:#fff;
  border:1px solid var(--line);
  border-radius:12px;
  color:var(--dark);
  font-weight:700;
}

.page-numbers.current,
.page-numbers:hover{
  background:#fff7ed;
  border-color:#fdba74;
  color:var(--accent-dark);
}

/* =========================
   Footer
   ========================= */
.site-footer{
  margin-top:34px;
  background:#0b1220;
  color:#cbd5e1;
}

.footer-top{
  padding:34px 0 18px;
}

.footer-grid{
  display:grid;
  grid-template-columns:1.2fr .9fr .9fr;
  gap:24px;
}

.footer-card h3{
  margin:0 0 12px;
  color:#fff;
  font-size:1.06rem;
}

.footer-card p,
.footer-card li,
.footer-card a{
  color:#cbd5e1;
}

.footer-card ul{
  list-style:none;
  margin:0;
  padding:0;
}

.footer-card li + li{
  margin-top:10px;
}

.footer-card a:hover{
  color:#fff;
}

.footer-bottom{
  border-top:1px solid rgba(255,255,255,.08);
  padding:16px 0 24px;
  font-size:.94rem;
  color:#94a3b8;
}

.footer-disclaimer{
  margin-top:12px;
  padding:14px 16px;
  border-radius:14px;
  background:rgba(255,255,255,.04);
  border:1px solid rgba(255,255,255,.06);
}

/* =========================
   404
   ========================= */
.not-found{
  padding:72px 0;
}

.not-found-card{
  max-width:760px;
  margin:0 auto;
  padding:34px;
  background:#fff;
  border:1px solid var(--line);
  border-radius:26px;
  box-shadow:var(--shadow);
  text-align:center;
}

.not-found-card h1{
  margin:0 0 12px;
  font-size:2rem;
  line-height:1.25;
}

.not-found-card p{
  color:var(--muted);
}

/* =========================
   Forms
   ========================= */
input,
textarea,
select,
button{
  font:inherit;
}

input[type="text"],
input[type="email"],
input[type="url"],
input[type="search"],
input[type="password"],
textarea,
select{
  width:100%;
  border:1px solid var(--line);
  border-radius:14px;
  background:#fff;
  color:var(--dark);
  min-height:48px;
  padding:12px 14px;
  outline:none;
  transition:.2s ease;
}

textarea{
  min-height:140px;
  resize:vertical;
}

input:focus,
textarea:focus,
select:focus{
  border-color:#fdba74;
  box-shadow:0 0 0 4px rgba(247,147,26,.08);
}

button,
input[type="submit"],
input[type="button"]{
  cursor:pointer;
}

/* =========================
   Media / embeds
   ========================= */
.wp-caption{
  max-width:100%;
  margin:18px 0;
}

.wp-caption-text{
  margin-top:8px;
  color:var(--muted);
  font-size:.92rem;
}

iframe,
video,
embed{
  max-width:100%;
  border:0;
}

/* =========================
   Utility
   ========================= */
.aligncenter{
  margin-left:auto;
  margin-right:auto;
}

.alignleft{
  float:left;
  margin-right:18px;
  margin-bottom:8px;
}

.alignright{
  float:right;
  margin-left:18px;
  margin-bottom:8px;
}

.wp-block-image img{
  border-radius:16px;
}

hr{
  border:0;
  border-top:1px solid var(--line);
  margin:26px 0;
}

/* =========================
   Tablet
   ========================= */
@media (max-width: 1180px){
  .header-inner{
    grid-template-columns:auto 1fr auto;
    gap:16px;
  }

  .primary-nav a{
    padding:0 14px;
    font-size:.93rem;
  }

  .site-tagline{
    display:none;
  }

  .hero-grid,
  .page-grid,
  .footer-grid{
    grid-template-columns:1fr;
  }

  .card-grid{
    grid-template-columns:repeat(2,1fr);
  }

  .quick-links{
    grid-template-columns:repeat(2,1fr);
  }
}

/* =========================
   Mobile / tablet menu
   ========================= */
@media (max-width: 900px){
  .header-inner{
    display:flex;
    align-items:center;
    justify-content:space-between;
    gap:12px;
    min-height:74px;
    padding:10px 0;
  }

  .branding{
    gap:12px;
    min-width:0;
  }

  .branding-logo,
  .branding-logo a,
  .custom-logo-link{
    width:48px;
    height:48px;
    flex:0 0 48px;
  }

  .branding-logo img,
  .custom-logo{
    width:48px !important;
    height:48px !important;
    max-width:48px !important;
    max-height:48px !important;
  }

  .site-title{
    font-size:1.02rem;
  }

  .site-tagline{
    display:none;
  }

  .menu-toggle{
    display:inline-flex;
  }

  .lang-switch{
    display:none;
  }

  .primary-nav-wrap{
    position:absolute;
    top:calc(100% + 10px);
    left:16px;
    right:16px;
    display:none;
    background:#fff;
    border:1px solid var(--line);
    border-radius:22px;
    box-shadow:0 20px 40px rgba(15,23,42,.14);
    padding:14px;
    z-index:1001;
  }

  .primary-nav-wrap.is-open{
    display:block;
  }

  .primary-nav{
    display:block;
    padding:0;
    background:transparent;
    border:0;
    box-shadow:none;
  }

  .primary-nav ul{
    flex-direction:column;
    align-items:stretch;
    gap:8px;
  }

  .primary-nav a{
    width:100%;
    justify-content:flex-start;
    min-height:46px;
    border-radius:14px;
    padding:0 14px;
  }

  .mobile-lang-switch{
    display:flex;
    gap:8px;
    flex-wrap:wrap;
    margin-top:12px;
    padding-top:12px;
    border-top:1px solid var(--line);
  }

  .mobile-lang-switch .lang-btn{
    flex:1 1 auto;
    justify-content:center;
  }

  .hero{
    padding-top:26px;
  }

  .hero-grid{
    grid-template-columns:1fr;
  }

  .hero-card,
  .hero-aside,
  .page-card,
  .content-card,
  .sidebar-card{
    padding:20px;
  }

  .hero h1{
    font-size:2rem;
  }

  .hero-meta{
    grid-template-columns:1fr;
  }

  .page-grid{
    grid-template-columns:1fr;
  }

  .footer-grid{
    grid-template-columns:1fr;
  }
}

@media (min-width: 901px){
  .mobile-lang-switch{
    display:none;
  }
}

/* =========================
   Small mobile
   ========================= */
@media (max-width: 767px){
  .container{
    width:min(var(--container), calc(100% - 24px));
  }

  .hero h1{
    font-size:1.82rem;
  }

  .section-title{
    font-size:1.5rem;
  }

  .card-grid,
  .quick-links{
    grid-template-columns:1fr;
  }

  .content-card,
  .page-card,
  .sidebar-card,
  .info-card{
    padding:18px;
  }

  .post-card{
    padding:20px;
  }

  .not-found-card{
    padding:24px;
  }

  .entry-content h2{
    font-size:1.38rem;
  }

  .entry-content h3{
    font-size:1.1rem;
  }
}