/* =========================================================
   SERENA RIVERSIDE — Design tokens
   Palette: Ink Navy / Deep Teal / River Blue / Ice Mist / Champagne Gold
   Type: Playfair Display (display) + Be Vietnam Pro (body/labels) — full Vietnamese diacritic support
   ========================================================= */
:root{
  --ink:        #08161F;   /* deepest navy - primary dark bg */
  --navy:       #0C2436;   /* header/nav dark */
  --teal:       #0F3A44;   /* secondary dark surfaces */
  --river:      #1C6E8C;   /* mid accent blue */
  --river-light:#4FA8C7;   /* lighter accent for links/hovers */
  --mist:       #EEF5F8;   /* light section bg (icy, NOT cream) */
  --mist-2:     #E1EEF3;   /* slightly deeper mist for cards */
  --white:      #FFFFFF;
  --gold:       #C7A759;   /* champagne gold — used sparingly */
  --gold-soft:  #E4D6A7;
  --ink-70:     rgba(8,22,31,.7);
  --ink-45:     rgba(8,22,31,.45);
  --line:       rgba(28,110,140,.18);
  --line-dark:  rgba(255,255,255,.12);

  --font-display: "Playfair Display", "Georgia", serif;
  --font-body: "Be Vietnam Pro", "Helvetica Neue", Arial, sans-serif;
  --font-mono: "Be Vietnam Pro", "Helvetica Neue", Arial, sans-serif;

  --container: 1240px;
  --radius: 2px;
  --ease: cubic-bezier(.16,.84,.44,1);
}

*,*::before,*::after{box-sizing:border-box;}
html{scroll-behavior:smooth;}
body{
  margin:0;
  font-family:var(--font-body);
  color:var(--ink);
  background:var(--white);
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
img{max-width:100%;display:block;}
a{color:inherit;text-decoration:none;}
h1,h2,h3,h4{font-family:var(--font-display);font-weight:600;margin:0;line-height:1.05;}
p{margin:0;line-height:1.7;}
ul{margin:0;padding:0;list-style:none;}
button{font-family:inherit;cursor:pointer;}

.container{max-width:var(--container);margin:0 auto;padding:0 32px;}

@media (max-width:640px){
  .container{padding:0 20px;}
}

/* -------- Reveal-on-scroll -------- */
.reveal{opacity:0;transform:translateY(28px);transition:opacity .9s var(--ease),transform .9s var(--ease);}
.reveal.is-visible{opacity:1;transform:translateY(0);}
.reveal-delay-1{transition-delay:.1s;}
.reveal-delay-2{transition-delay:.22s;}
.reveal-delay-3{transition-delay:.34s;}

@media (prefers-reduced-motion: reduce){
  html{scroll-behavior:auto;}
  .reveal{opacity:1 !important;transform:none !important;transition:none !important;}
  *{animation-duration:.001ms !important;animation-iteration-count:1 !important;transition-duration:.001ms !important;scroll-behavior:auto !important;}
}

/* -------- Eyebrow / labels -------- */
.eyebrow{font-weight:500;
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.28em;
  text-transform:uppercase;
  color:var(--river);
  display:flex;
  align-items:center;
  gap:12px;
}
.eyebrow::before{
  content:"";
  width:28px;height:1px;
  background:var(--gold);
  display:inline-block;
}
.on-dark .eyebrow{color:var(--gold-soft);}

/* -------- Buttons -------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:10px;
  padding:16px 34px;
  font-family:var(--font-mono);
  font-weight:600;
  font-size:13px;
  letter-spacing:.08em;
  text-transform:uppercase;
  border-radius:var(--radius);
  border:1px solid transparent;
  transition:all .35s var(--ease);
  white-space:nowrap;
}
.btn-primary{
  background:var(--gold);
  color:var(--ink);
  border-color:var(--gold);
}
.btn-primary:hover{background:transparent;color:var(--gold);border-color:var(--gold);}
.btn-outline{
  background:transparent;
  color:var(--white);
  border-color:rgba(255,255,255,.5);
}
.btn-outline:hover{border-color:var(--white);background:rgba(255,255,255,.08);}
.btn-outline-dark{
  background:transparent;
  color:var(--navy);
  border-color:var(--navy);
}
.btn-outline-dark:hover{background:var(--navy);color:var(--white);}
.btn-ghost{
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.1em;
  text-transform:uppercase;
  color:var(--river);
  border-bottom:1px solid var(--river);
  padding:2px 0;
}

/* -------- Wave divider (signature motif) -------- */
.wave-divider{
  display:block;width:100%;line-height:0;
}
.wave-divider svg{width:100%;height:auto;display:block;}

/* -------- Section spacing -------- */
.section{padding:120px 0;}
.section-tight{padding:80px 0;}
@media (max-width:900px){
  .section{padding:80px 0;}
  .section-tight{padding:56px 0;}
}
.section-dark{background:var(--ink);color:var(--white);}
.section-mist{background:var(--mist);}

.section-head{max-width:680px;margin-bottom:56px;}
.section-head h2{font-size:clamp(32px,4.2vw,52px);margin-top:18px;letter-spacing:.01em;}
.section-head p.lead{margin-top:20px;font-size:17px;color:var(--ink-70);}
.on-dark .section-head p.lead{color:rgba(255,255,255,.72);}

/* ================= NAV ================= */
.nav{
  position:fixed;top:0;left:0;right:0;z-index:1000;
  padding:22px 0;
  transition:background .4s var(--ease), padding .4s var(--ease), box-shadow .4s var(--ease);
}
.nav-inner{display:flex;align-items:center;justify-content:space-between;gap:24px;}
.nav.is-scrolled{
  background:rgba(8,22,31,.92);
  backdrop-filter:blur(10px);
  padding:14px 0;
  box-shadow:0 8px 24px rgba(0,0,0,.18);
}
.brand{display:flex;align-items:center;gap:12px;}
.brand-mark{
  width:38px;height:38px;border:1px solid var(--gold);border-radius:50%;
  display:flex;align-items:center;justify-content:center;
  color:var(--gold);font-family:var(--font-display);font-size:18px;
}
.brand-text{display:flex;flex-direction:column;line-height:1;}
.brand-text b{font-family:var(--font-display);font-size:22px;color:var(--white);letter-spacing:.03em;}
.brand-text span{font-family:var(--font-mono);font-weight:600;font-size:9px;letter-spacing:.32em;color:var(--gold-soft);margin-top:4px;}

.nav-links{display:flex;align-items:center;gap:34px;}
.nav-links a{font-weight:500;
  font-family:var(--font-mono);font-size:12.5px;letter-spacing:.06em;
  color:rgba(255,255,255,.82);text-transform:uppercase;
  position:relative;padding-bottom:4px;
}
.nav-links a::after{
  content:"";position:absolute;left:0;bottom:0;width:0;height:1px;background:var(--gold);
  transition:width .3s var(--ease);
}
.nav-links a:hover::after{width:100%;}
.nav-cta{display:flex;align-items:center;gap:16px;}
.nav-phone{
  display:flex;align-items:center;gap:8px;
  font-family:var(--font-mono);color:var(--white);font-size:13px;letter-spacing:.03em;
}
.nav-phone svg{width:15px;height:15px;stroke:var(--gold);}

.nav-toggle{display:none;background:none;border:none;padding:6px;}
.nav-toggle span{display:block;width:24px;height:1.5px;background:var(--white);margin:5px 0;transition:.3s;}

@media (max-width:980px){
  .nav-links{
    position:fixed;inset:0 0 0 auto;width:78%;max-width:340px;height:100vh;
    background:var(--ink);flex-direction:column;justify-content:center;align-items:flex-start;
    padding:40px;gap:26px;
    transform:translateX(100%);transition:transform .45s var(--ease);
  }
  .nav-links.is-open{transform:translateX(0);}
  .nav-phone{display:none;}
  .nav-toggle{display:block;}
}

/* ================= HERO ================= */
.hero{
  position:relative;min-height:100vh;display:flex;align-items:flex-end;
  color:var(--white);overflow:hidden;
}
.hero-media{position:absolute;inset:0;z-index:0;}
.hero-media img{width:100%;height:100%;object-fit:cover;transform:scale(1.08);transition:transform 6s var(--ease);}
.hero.is-loaded .hero-media img{transform:scale(1);}
.hero-media::after{
  content:"";position:absolute;inset:0;
  background:
    linear-gradient(180deg, rgba(8,22,31,.55) 0%, rgba(8,22,31,.25) 32%, rgba(8,22,31,.55) 70%, rgba(8,22,31,.94) 100%);
}
.hero-inner{position:relative;z-index:1;width:100%;padding-bottom:96px;}
.hero-tag{
  font-family:var(--font-mono);font-size:12px;letter-spacing:.32em;text-transform:uppercase;
  color:var(--gold-soft);margin-bottom:22px;display:flex;align-items:center;gap:14px;
}
.hero-tag::before{content:"";width:40px;height:1px;background:var(--gold);}
.hero h1{
  font-size:clamp(40px,6.6vw,92px);
  font-weight:500;
  max-width:15ch;
  letter-spacing:.005em;
}
.hero h1 em{font-style:italic;color:var(--gold-soft);}
.hero-sub{margin-top:26px;max-width:540px;font-size:18px;color:rgba(255,255,255,.82);}
.hero-actions{display:flex;gap:18px;margin-top:44px;flex-wrap:wrap;}
.hero-stats{
  display:grid;grid-template-columns:repeat(4,auto);gap:48px;
  margin-top:76px;padding-top:32px;border-top:1px solid rgba(255,255,255,.18);
  max-width:820px;
}
.hero-stats div b{
  display:block;font-family:var(--font-display);font-size:clamp(24px,2.6vw,34px);color:var(--white);
}
.hero-stats div span{
  display:block;margin-top:6px;font-family:var(--font-mono);font-size:10.5px;letter-spacing:.12em;
  text-transform:uppercase;color:rgba(255,255,255,.6);
}
@media (max-width:760px){
  .hero-stats{grid-template-columns:repeat(2,auto);row-gap:24px;}
}

.scroll-cue{
  position:absolute;right:32px;bottom:36px;z-index:2;
  display:flex;flex-direction:column;align-items:center;gap:10px;
  color:rgba(255,255,255,.7);font-family:var(--font-mono);font-size:10px;letter-spacing:.2em;
}
.scroll-cue .line{width:1px;height:46px;background:rgba(255,255,255,.35);position:relative;overflow:hidden;}
.scroll-cue .line::after{
  content:"";position:absolute;top:-100%;left:0;width:100%;height:100%;background:var(--gold);
  animation:scrollcue 2.2s ease-in-out infinite;
}
@keyframes scrollcue{ 0%{top:-100%;} 60%{top:100%;} 100%{top:100%;} }
@media (max-width:760px){.scroll-cue{display:none;}}

/* ================= OVERVIEW / FACTS ================= */
.facts-grid{
  display:grid;grid-template-columns:repeat(4,1fr);gap:1px;
  background:var(--line);border:1px solid var(--line);margin-top:64px;
}
.fact-cell{background:var(--white);padding:34px 28px;}
.fact-cell .num{font-family:var(--font-mono);font-weight:600;font-size:11px;color:var(--river);letter-spacing:.1em;}
.fact-cell h4{font-size:26px;margin-top:14px;color:var(--navy);}
.fact-cell p{margin-top:8px;font-size:13.5px;color:var(--ink-70);}
@media (max-width:900px){.facts-grid{grid-template-columns:repeat(2,1fr);}}
@media (max-width:520px){.facts-grid{grid-template-columns:1fr;}}

.overview-flex{display:grid;grid-template-columns:1.05fr .95fr;gap:72px;align-items:center;}
.overview-media{position:relative;background:var(--navy);}
.overview-media img{width:100%;height:560px;object-fit:contain;background:var(--navy);cursor:zoom-in;}
.overview-media::before{
  content:"";position:absolute;top:-22px;left:-22px;width:120px;height:120px;
  border-top:1px solid var(--gold);border-left:1px solid var(--gold);z-index:2;
}
.overview-media::after{
  content:"";position:absolute;bottom:-22px;right:-22px;width:120px;height:120px;
  border-bottom:1px solid var(--gold);border-right:1px solid var(--gold);z-index:2;
}
@media (max-width:940px){
  .overview-flex{grid-template-columns:1fr;gap:44px;}
  .overview-media img{height:320px;}
}

/* ================= LOCATION ================= */
.location-wrap{display:grid;grid-template-columns:1fr 1fr;gap:0;background:var(--navy);color:var(--white);}
.location-text{padding:90px 64px;}
.location-list{margin-top:36px;display:flex;flex-direction:column;gap:22px;}
.location-list li{display:flex;gap:16px;align-items:flex-start;font-size:15px;color:rgba(255,255,255,.85);}
.location-list li .ic{
  flex:0 0 auto;width:34px;height:34px;border:1px solid var(--gold);border-radius:50%;
  display:flex;align-items:center;justify-content:center;color:var(--gold);font-size:14px;
}
.map-embed{min-height:460px;position:relative;background:var(--navy);}
.map-embed iframe{width:100%;height:100%;min-height:460px;border:0;filter:grayscale(.15) contrast(1.05);}
.map-embed img{cursor:zoom-in;}
@media (max-width:940px){
  .location-wrap{grid-template-columns:1fr;}
  .location-text{padding:64px 28px;}
}

/* ================= AMENITIES ================= */
.amenities-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:2px;margin-top:56px;background:var(--line);}
.amenity-card{
  background:var(--white);padding:38px 26px;min-height:220px;
  display:flex;flex-direction:column;justify-content:space-between;
  transition:background .4s var(--ease),transform .4s var(--ease);
  position:relative;overflow:hidden;
}
.amenity-card:hover{background:var(--navy);transform:translateY(-4px);}
.amenity-card:hover *{color:var(--white) !important;}
.amenity-card .ic{color:var(--river);}
.amenity-card .ic svg{width:30px;height:30px;stroke-width:1.3;}
.amenity-card h4{margin-top:26px;font-size:19px;color:var(--navy);font-weight:600;}
.amenity-card p{margin-top:6px;font-size:13px;color:var(--ink-70);}
@media (max-width:980px){.amenities-grid{grid-template-columns:repeat(2,1fr);}}
@media (max-width:520px){.amenities-grid{grid-template-columns:1fr;}}

/* ================= TABS (Floor plans / Unit types) ================= */
.tabbar{
  display:flex;flex-wrap:wrap;gap:10px;border-bottom:1px solid var(--line);padding-bottom:0;margin-top:46px;
}
.tab-btn{font-weight:500;
  background:none;border:none;
  font-family:var(--font-mono);font-size:12.5px;letter-spacing:.08em;text-transform:uppercase;
  color:var(--ink-70);padding:16px 22px;position:relative;transition:color .3s;
}
.tab-btn::after{
  content:"";position:absolute;left:22px;right:22px;bottom:-1px;height:2px;background:var(--gold);
  transform:scaleX(0);transform-origin:left;transition:transform .35s var(--ease);
}
.tab-btn.is-active{color:var(--navy);font-weight:600;}
.tab-btn.is-active::after{transform:scaleX(1);}
.tab-btn:hover{color:var(--river);}

.tab-panels{margin-top:48px;}
.tab-panel{display:none;}
.tab-panel.is-active{display:block;animation:tabin .5s var(--ease);}
@keyframes tabin{from{opacity:0;transform:translateY(14px);}to{opacity:1;transform:translateY(0);}}

.plan-layout{display:grid;grid-template-columns:1.15fr .85fr;gap:56px;align-items:center;}
.plan-media{
  background:var(--mist-2);aspect-ratio:4/3;display:flex;align-items:center;justify-content:center;
  border:1px solid var(--line);position:relative;overflow:hidden;
}
.plan-media img{width:100%;height:100%;object-fit:cover;cursor:zoom-in;}
.plan-placeholder{text-align:center;color:var(--river);padding:32px;}
.plan-placeholder svg{width:64px;height:64px;stroke-width:1;margin:0 auto 16px;opacity:.55;}
.plan-placeholder p{font-family:var(--font-mono);font-size:11.5px;letter-spacing:.08em;text-transform:uppercase;color:var(--ink-45);}
.plan-info h3{font-size:30px;color:var(--navy);}
.plan-specs{margin-top:28px;display:flex;flex-direction:column;gap:0;border-top:1px solid var(--line);}
.plan-specs .row{display:flex;justify-content:space-between;padding:14px 0;border-bottom:1px solid var(--line);font-size:14.5px;}
.plan-specs .row span:first-child{color:var(--ink-70);}
.plan-specs .row span:last-child{font-family:var(--font-mono);color:var(--navy);font-weight:500;}
@media (max-width:900px){.plan-layout{grid-template-columns:1fr;gap:32px;}}

/* Unit type cards */
.unit-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:28px;}
.unit-card{
  border:1px solid var(--line);padding:36px 30px;transition:box-shadow .4s var(--ease), border-color .4s;
  background:var(--white);
}
.unit-card:hover{box-shadow:0 24px 48px rgba(12,36,54,.12);border-color:var(--river);}
.unit-card .tag{
  font-family:var(--font-mono);font-size:10.5px;letter-spacing:.14em;text-transform:uppercase;
  color:var(--gold);background:var(--navy);display:inline-block;padding:6px 12px;
}
.unit-card h3{margin-top:22px;font-size:28px;color:var(--navy);}
.unit-card .area{font-family:var(--font-mono);font-size:14px;color:var(--river);margin-top:8px;}
.unit-card p{margin-top:16px;font-size:14px;color:var(--ink-70);}
.unit-card ul{margin-top:18px;display:flex;flex-direction:column;gap:8px;}
.unit-card ul li{font-size:13.5px;color:var(--ink-70);display:flex;gap:10px;}
.unit-card ul li::before{content:"—";color:var(--gold);}
@media (max-width:980px){.unit-grid{grid-template-columns:1fr 1fr;}}
@media (max-width:640px){.unit-grid{grid-template-columns:1fr;}}

/* ================= FAQ (native details/summary accordion) ================= */
.faq-list{max-width:820px;margin-top:56px;border-top:1px solid var(--line);}
.faq-item{border-bottom:1px solid var(--line);}
.faq-item summary{
  list-style:none;cursor:pointer;padding:26px 4px;
  display:flex;align-items:center;justify-content:space-between;gap:20px;
  font-family:var(--font-body);font-weight:500;font-size:17px;color:var(--navy);
}
.faq-item summary::-webkit-details-marker{display:none;}
.faq-item summary::after{
  content:"+";flex:0 0 auto;font-family:var(--font-display);font-size:26px;color:var(--gold);
  transition:transform .35s var(--ease);line-height:1;
}
.faq-item[open] summary::after{transform:rotate(45deg);}
.faq-item summary:hover{color:var(--river);}
.faq-answer{padding:0 4px 26px;max-width:680px;}
.faq-answer p{font-size:15px;color:var(--ink-70);}
.faq-answer a{color:var(--river);border-bottom:1px solid var(--river);}

/* ================= GALLERY ================= */
.gallery-grid{
  display:grid;grid-template-columns:repeat(4,1fr);grid-auto-rows:180px;gap:8px;margin-top:56px;
}
.gallery-grid .g-item{overflow:hidden;position:relative;background:var(--mist-2);}
.gallery-grid .g-item img{width:100%;height:100%;object-fit:cover;transition:transform .8s var(--ease);cursor:zoom-in;}
.gallery-grid .g-item:hover img{transform:scale(1.08);}
.gallery-grid .g1{grid-column:span 2;grid-row:span 2;}
.gallery-grid .g4{grid-column:span 2;}
.g-caption{
  position:absolute;left:0;right:0;bottom:0;padding:16px 18px;
  background:linear-gradient(0deg, rgba(8,22,31,.75), transparent);
  color:#fff;font-family:var(--font-mono);font-size:11px;letter-spacing:.08em;text-transform:uppercase;
  opacity:0;transform:translateY(8px);transition:.35s;
}
.g-item:hover .g-caption{opacity:1;transform:translateY(0);}
@media (max-width:900px){
  .gallery-grid{grid-template-columns:repeat(2,1fr);grid-auto-rows:160px;}
  .gallery-grid .g1{grid-column:span 2;grid-row:span 1;}
}

/* ================= PROGRESS TIMELINE ================= */
.timeline{display:flex;justify-content:space-between;margin-top:70px;position:relative;flex-wrap:wrap;gap:36px;}
.timeline::before{content:"";position:absolute;top:9px;left:0;right:0;height:1px;background:var(--line-dark);}
.timeline .t-item{flex:1 1 200px;position:relative;padding-top:34px;}
.timeline .t-item::before{
  content:"";position:absolute;top:0;left:0;width:18px;height:18px;border-radius:50%;
  border:1px solid var(--gold);background:var(--ink);
}
.timeline .t-item b{display:block;font-family:var(--font-mono);font-weight:600;font-size:11px;letter-spacing:.08em;color:var(--gold-soft);text-transform:uppercase;}
.timeline .t-item p{margin-top:10px;font-size:15px;color:rgba(255,255,255,.82);}

/* ================= CONTACT ================= */
.contact-wrap{display:grid;grid-template-columns:.95fr 1.05fr;gap:0;background:var(--white);border:1px solid var(--line);}
.contact-info{background:var(--navy);color:var(--white);padding:64px 54px;}
.agent-card{margin-top:40px;display:flex;gap:18px;align-items:center;padding:22px;border:1px solid rgba(255,255,255,.18);}
.agent-avatar{
  width:58px;height:58px;border-radius:50%;background:var(--gold);color:var(--ink);
  display:flex;align-items:center;justify-content:center;font-family:var(--font-display);font-size:22px;flex:0 0 auto;
}
.agent-meta b{display:block;font-size:16px;}
.agent-meta span{display:block;font-size:12.5px;color:rgba(255,255,255,.65);margin-top:3px;}
.contact-phone-big{
  margin-top:30px;display:flex;align-items:center;gap:14px;font-family:var(--font-mono);
  font-size:26px;color:var(--gold-soft);
}
.contact-form{padding:64px 54px;}
.contact-cta{padding:64px 54px;display:flex;flex-direction:column;justify-content:center;}
.form-row{display:grid;grid-template-columns:1fr 1fr;gap:20px;}
.field{margin-bottom:22px;}
.field label{display:block;font-family:var(--font-mono);font-size:11px;letter-spacing:.08em;text-transform:uppercase;color:var(--ink-70);margin-bottom:9px;}
.field input,.field textarea,.field select{
  width:100%;border:none;border-bottom:1px solid var(--line);background:transparent;
  padding:11px 2px;font-family:var(--font-body);font-size:15px;color:var(--ink);
  transition:border-color .3s;
}
.field input:focus,.field textarea:focus,.field select:focus{outline:none;border-color:var(--river);}
.field textarea{resize:vertical;min-height:90px;}
.form-note{margin-top:18px;font-size:12px;color:var(--ink-45);}
@media (max-width:900px){
  .contact-wrap{grid-template-columns:1fr;}
  .contact-info,.contact-form,.contact-cta{padding:44px 26px;}
  .form-row{grid-template-columns:1fr;}
}

/* ================= FOOTER ================= */
.site-footer{background:var(--ink);color:rgba(255,255,255,.7);padding:76px 0 28px;}
.footer-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1fr;gap:48px;}
.footer-grid h5{font-family:var(--font-mono);font-weight:600;font-size:11.5px;letter-spacing:.1em;text-transform:uppercase;color:var(--gold-soft);margin-bottom:20px;}
.footer-grid ul{display:flex;flex-direction:column;gap:12px;font-size:14px;}
.footer-grid ul a:hover{color:var(--white);}
.footer-bottom{
  margin-top:64px;padding-top:26px;border-top:1px solid var(--line-dark);
  display:flex;justify-content:space-between;flex-wrap:wrap;gap:14px;font-size:12.5px;color:rgba(255,255,255,.5);
}
.footer-bottom a{color:rgba(255,255,255,.5);}
.footer-bottom a:hover{color:var(--gold-soft);}
.footer-disclaimer{font-size:11.5px;color:rgba(255,255,255,.35);margin-top:26px;max-width:900px;line-height:1.7;}
@media (max-width:900px){
  .footer-grid{grid-template-columns:1fr 1fr;}
}

/* ================= Zalo brand button ================= */
.zalo-ic{
  display:inline-flex;align-items:center;justify-content:center;
  width:20px;height:20px;border-radius:50%;background:#fff;color:#0068FF;
  font-family:var(--font-display);font-weight:700;font-size:13px;flex:0 0 auto;
}
.btn-zalo{background:#0068FF;color:#fff;border-color:#0068FF;}
.btn-zalo:hover{background:transparent;color:#0068FF;border-color:#0068FF;}
.btn-zalo:hover .zalo-ic{background:#0068FF;color:#fff;}

.contact-cta-buttons{display:flex;flex-direction:column;gap:14px;margin-top:32px;}
.btn-cta-lg{width:100%;padding:19px 24px;font-size:14px;gap:12px;}

/* ================= Floating circular contact buttons (mobile) ================= */
.fab-contact{
  position:fixed;right:18px;bottom:26px;z-index:900;
  display:none;flex-direction:column;gap:14px;
}
.fab-btn{
  width:56px;height:56px;border-radius:50%;
  display:flex;align-items:center;justify-content:center;
  box-shadow:0 10px 26px rgba(8,22,31,.32);
  animation:fabpulse 2.6s ease-in-out infinite;
}
.fab-phone{background:var(--gold);color:var(--ink);}
.fab-zalo{background:#0068FF;color:#fff;}
.fab-zalo .zalo-ic{width:26px;height:26px;font-size:16px;background:transparent;color:#fff;}
@keyframes fabpulse{
  0%,100%{transform:scale(1);}
  50%{transform:scale(1.06);}
}
@media (max-width:760px){
  .fab-contact{display:flex;}
  body{padding-bottom:0;}
}
@media (prefers-reduced-motion: reduce){
  .fab-btn{animation:none;}
}

/* Back to top */
.to-top{
  position:fixed;right:26px;bottom:96px;z-index:800;
  width:44px;height:44px;border-radius:50%;background:var(--navy);color:var(--gold);
  display:flex;align-items:center;justify-content:center;opacity:0;pointer-events:none;
  transition:opacity .35s, transform .35s;border:1px solid rgba(255,255,255,.15);
}
.to-top.is-visible{opacity:1;pointer-events:auto;}
.to-top:hover{transform:translateY(-3px);}
@media (max-width:760px){.to-top{bottom:80px;}}

/* Simple legal page */
.legal-page{padding:180px 0 100px;max-width:860px;margin:0 auto;}
.legal-page h1{font-size:44px;color:var(--navy);}
.legal-page .updated{font-family:var(--font-mono);font-size:12px;color:var(--ink-45);margin-top:14px;letter-spacing:.05em;}
.legal-page h2{font-size:24px;color:var(--navy);margin-top:48px;margin-bottom:16px;}
.legal-page p, .legal-page li{font-size:15.5px;color:var(--ink-70);margin-bottom:12px;}
.legal-page ul{padding-left:20px;list-style:disc;}
.legal-page a{color:var(--river);border-bottom:1px solid var(--river);}

/* ================= BLOG LISTING ================= */
.blog-hero{
  padding:170px 0 70px;background:var(--navy);color:var(--white);
}
.blog-hero h1{font-size:clamp(34px,4.4vw,54px);margin-top:16px;}
.blog-hero p{margin-top:16px;max-width:560px;color:rgba(255,255,255,.72);font-size:15.5px;}

.blog-grid{
  display:grid;grid-template-columns:repeat(3,1fr);gap:28px;margin-top:56px;
}
.blog-card{
  border:1px solid var(--line);background:var(--white);
  transition:box-shadow .4s var(--ease), transform .4s var(--ease);
  display:flex;flex-direction:column;
}
.blog-card:hover{box-shadow:0 24px 48px rgba(12,36,54,.14);transform:translateY(-4px);}
.blog-card .thumb{aspect-ratio:16/10;overflow:hidden;}
.blog-card .thumb img{width:100%;height:100%;object-fit:cover;transition:transform .7s var(--ease);}
.blog-card:hover .thumb img{transform:scale(1.06);}
.blog-card .body{padding:26px 24px 28px;display:flex;flex-direction:column;flex:1;}
.blog-card .meta{font-family:var(--font-mono);font-size:11px;letter-spacing:.08em;text-transform:uppercase;color:var(--river);}
.blog-card h3{margin-top:12px;font-size:21px;color:var(--navy);line-height:1.3;}
.blog-card p{margin-top:10px;font-size:14px;color:var(--ink-70);flex:1;}
.blog-card .read-more{margin-top:18px;font-family:var(--font-mono);font-size:12px;letter-spacing:.06em;text-transform:uppercase;color:var(--navy);display:inline-flex;align-items:center;gap:8px;}
.blog-card .read-more svg{width:14px;height:14px;transition:transform .3s;}
.blog-card:hover .read-more svg{transform:translateX(4px);}
@media (max-width:980px){.blog-grid{grid-template-columns:repeat(2,1fr);}}
@media (max-width:640px){.blog-grid{grid-template-columns:1fr;}}

/* ================= ARTICLE PAGE ================= */
.article-crumb{
  padding:150px 0 0;
  font-family:var(--font-mono);font-size:12px;letter-spacing:.05em;color:var(--ink-45);
}
.article-crumb a{color:var(--river);}
.article-head{padding:18px 0 40px;max-width:820px;}
.article-head .tag{
  font-family:var(--font-mono);font-size:11px;letter-spacing:.1em;text-transform:uppercase;
  color:var(--gold);background:var(--navy);display:inline-block;padding:6px 14px;
}
.article-head h1{margin-top:20px;font-size:clamp(30px,4.4vw,48px);color:var(--navy);}
.article-meta{
  margin-top:20px;display:flex;gap:22px;flex-wrap:wrap;
  font-family:var(--font-mono);font-size:12px;letter-spacing:.04em;color:var(--ink-45);
}
.article-hero-img{max-width:1100px;margin:0 auto;}
.article-hero-img img{width:100%;height:auto;max-height:520px;object-fit:cover;}

.article-body{max-width:760px;margin:0 auto;padding:56px 0 100px;}
.article-body h2{font-size:27px;color:var(--navy);margin-top:52px;margin-bottom:18px;}
.article-body p{font-size:16px;line-height:1.85;color:var(--ink-70);margin-bottom:18px;}
.article-body p strong{color:var(--navy);}
.article-body ul, .article-body ol{padding-left:22px;margin-bottom:18px;}
.article-body li{font-size:15.5px;line-height:1.8;color:var(--ink-70);margin-bottom:8px;}
.article-body a{color:var(--river);border-bottom:1px solid var(--river);}
.article-body hr{border:none;border-top:1px solid var(--line);margin:44px 0;}
.article-body em{color:var(--ink-45);font-style:italic;font-size:14.5px;}

.article-table{width:100%;border-collapse:collapse;margin:24px 0 32px;font-size:14.5px;}
.article-table th, .article-table td{padding:13px 16px;border:1px solid var(--line);text-align:left;}
.article-table th{background:var(--mist-2);color:var(--navy);font-weight:600;}
.article-table td{color:var(--ink-70);}

.article-faq-item{border-bottom:1px solid var(--line);padding:22px 0;}
.article-faq-item b{display:block;font-size:16.5px;color:var(--navy);margin-bottom:8px;}

.article-cta{
  margin-top:56px;background:var(--navy);color:var(--white);padding:44px 40px;
  display:flex;align-items:center;justify-content:space-between;gap:24px;flex-wrap:wrap;
}
.article-cta h3{font-size:22px;color:var(--white);max-width:360px;}
.article-cta .buttons{display:flex;gap:14px;flex-wrap:wrap;}
@media (max-width:640px){
  .article-cta{padding:32px 24px;}
  .article-crumb{padding-top:130px;}
}

/* ================= LEAD POPUP (Netlify Forms) ================= */
.popup-overlay{
  position:fixed;inset:0;z-index:3000;background:rgba(8,22,31,.78);
  display:none;align-items:center;justify-content:center;padding:20px;
  backdrop-filter:blur(3px);
}
.popup-overlay.is-open{display:flex;animation:popupfade .3s var(--ease);}
@keyframes popupfade{from{opacity:0;}to{opacity:1;}}
.popup-box{
  background:var(--white);max-width:440px;width:100%;position:relative;
  box-shadow:0 40px 90px rgba(0,0,0,.4);overflow:hidden;
  animation:popupin .4s var(--ease);
}
@keyframes popupin{from{opacity:0;transform:translateY(24px) scale(.98);}to{opacity:1;transform:translateY(0) scale(1);}}
.popup-img{height:140px;overflow:hidden;position:relative;}
.popup-img img{width:100%;height:100%;object-fit:cover;}
.popup-img::after{content:"";position:absolute;inset:0;background:linear-gradient(0deg, rgba(8,22,31,.55), transparent 60%);}
.popup-close{
  position:absolute;top:14px;right:14px;width:34px;height:34px;border-radius:50%;
  background:rgba(255,255,255,.92);color:var(--navy);border:none;
  display:flex;align-items:center;justify-content:center;font-size:16px;line-height:1;
  cursor:pointer;transition:background .3s,transform .3s;z-index:2;
}
.popup-close:hover{background:var(--white);transform:rotate(90deg);}
.popup-body{padding:30px 32px 32px;}
.popup-body .eyebrow{margin-bottom:4px;}
.popup-body h3{margin-top:14px;font-size:24px;color:var(--navy);line-height:1.25;}
.popup-body p.desc{margin-top:12px;font-size:14px;color:var(--ink-70);}
.popup-body form{margin-top:22px;}
.popup-body .field{margin-bottom:16px;}
.popup-success{display:none;margin-top:22px;padding:16px;background:var(--mist-2);border-left:2px solid var(--river);font-size:14px;color:var(--navy);}
.popup-success.is-shown{display:block;}
.popup-note{margin-top:14px;font-size:11px;color:var(--ink-45);}
.popup-note a{color:var(--river);border-bottom:1px solid var(--river);}
@media (max-width:480px){
  .popup-body{padding:26px 22px 28px;}
  .popup-img{height:110px;}
}

/* ================= FOOTER LEAD FORM ================= */
.footer-lead{
  background:var(--teal);padding:48px 0;
}
.footer-lead-inner{
  display:flex;align-items:center;justify-content:space-between;gap:32px;flex-wrap:wrap;
}
.footer-lead-text{max-width:360px;}
.footer-lead-text h4{color:var(--white);font-size:22px;font-family:var(--font-display);}
.footer-lead-text p{margin-top:8px;font-size:13.5px;color:rgba(255,255,255,.65);}
.footer-lead-form{display:flex;gap:12px;flex-wrap:wrap;flex:1;max-width:540px;align-items:flex-start;}
.footer-lead-form .f-field{flex:1;min-width:160px;}
.footer-lead-form input{
  width:100%;background:rgba(255,255,255,.06);border:1px solid rgba(255,255,255,.2);
  padding:13px 14px;color:var(--white);font-size:14px;font-family:var(--font-body);
  border-radius:2px;transition:border-color .3s,background .3s;
}
.footer-lead-form input::placeholder{color:rgba(255,255,255,.4);}
.footer-lead-form input:focus{outline:none;border-color:var(--gold);background:rgba(255,255,255,.1);}
.footer-lead-form button{flex:0 0 auto;white-space:nowrap;}
.footer-lead-success{
  display:none;margin-top:14px;font-size:13.5px;color:var(--gold-soft);
  width:100%;
}
.footer-lead-success.is-shown{display:block;}
@media (max-width:900px){
  .footer-lead-inner{flex-direction:column;align-items:flex-start;}
  .footer-lead-form{max-width:none;width:100%;}
}

/* ================= AMENITY PHOTO CARDS (ảnh thật từ CĐT) — bố cục bento rõ ràng ================= */
.amenity-photo-grid{
  display:grid;
  grid-template-columns:repeat(4,1fr);
  grid-template-rows:repeat(2,240px);
  gap:14px;margin-top:56px;
}
.amenity-photo-card{
  position:relative;overflow:hidden;background:var(--ink);
}
.amenity-photo-card.featured{
  grid-column:1 / 3;grid-row:1 / 3;
}
.amenity-photo-card img{
  width:100%;height:100%;object-fit:cover;transition:transform .8s var(--ease);
}
.amenity-photo-card:hover img{transform:scale(1.08);}
.amenity-photo-card::after{
  content:"";position:absolute;inset:0;
  background:linear-gradient(0deg, rgba(8,22,31,.85) 0%, rgba(8,22,31,.15) 45%, transparent 70%);
}
.amenity-photo-label{
  position:absolute;left:22px;bottom:20px;z-index:2;color:var(--white);
}
.amenity-photo-label .tag{
  font-family:var(--font-mono);font-size:10px;letter-spacing:.14em;text-transform:uppercase;
  color:var(--gold-soft);
}
.amenity-photo-label h4{
  font-family:var(--font-display);font-size:22px;margin-top:6px;color:var(--white);
}
.amenity-photo-card.featured .amenity-photo-label h4{font-size:28px;}

@media (max-width:900px){
  .amenity-photo-grid{
    grid-template-columns:repeat(2,1fr);
    grid-template-rows:200px repeat(2,160px);
  }
  .amenity-photo-card.featured{grid-column:1 / 3;grid-row:1 / 2;}
}
@media (max-width:560px){
  .amenity-photo-grid{
    grid-template-columns:1fr;
    grid-template-rows:none;
  }
  .amenity-photo-card{aspect-ratio:4/3;}
  .amenity-photo-card.featured{grid-column:1;grid-row:auto;aspect-ratio:4/3;}
}

.amenities-grid-small{
  display:grid;grid-template-columns:repeat(4,1fr);gap:2px;margin-top:16px;background:var(--line);
}
@media (max-width:900px){.amenities-grid-small{grid-template-columns:repeat(2,1fr);}}
@media (max-width:520px){.amenities-grid-small{grid-template-columns:1fr;}}

/* ================= Article poster image (không crop, cho ảnh banner/infographic dọc) ================= */
.article-hero-poster{
  max-width:480px;margin:0 auto;
  box-shadow:0 30px 70px rgba(8,22,31,.28);
}
.article-hero-poster img{
  width:100%;height:auto;display:block;
}
@media (max-width:560px){
  .article-hero-poster{max-width:340px;}
}

/* ================= FLOOR PLAN GALLERY (sơ đồ mặt bằng tầng) ================= */
.floorplan-gallery{
  display:grid;grid-template-columns:repeat(2,1fr);gap:20px;margin-top:32px;
}
.floorplan-gallery-item{background:var(--mist-2);border:1px solid var(--line);overflow:hidden;}
.floorplan-gallery-item img{width:100%;height:auto;display:block;cursor:zoom-in;}
.floorplan-gallery-item .cap{padding:14px 18px;font-family:var(--font-mono);font-size:11.5px;letter-spacing:.06em;text-transform:uppercase;color:var(--navy);border-top:1px solid var(--line);}
@media (max-width:760px){
  .floorplan-gallery{grid-template-columns:1fr;}
}

/* ================= CONSENT CHECKBOX (Nghị định 330/2026/NĐ-CP) ================= */
.consent-field{margin:16px 0 4px;}
.consent-label{
  display:flex;align-items:flex-start;gap:10px;cursor:pointer;
  font-size:12px;line-height:1.6;color:var(--ink-70);
}
.consent-label input[type="checkbox"]{
  flex:0 0 auto;margin-top:2px;width:15px;height:15px;accent-color:var(--river);cursor:pointer;
}
.consent-label a{color:var(--river);border-bottom:1px solid var(--river);}
.footer-lead-form .consent-field{width:100%;margin:2px 0 8px;}
.footer-lead-form .consent-label{color:rgba(255,255,255,.65);font-size:11.5px;}
.footer-lead-form .consent-label a{color:var(--gold-soft);border-bottom:1px solid var(--gold-soft);}

/* ================= IMAGE LIGHTBOX (phóng to ảnh) ================= */
.lightbox-overlay{
  position:fixed;inset:0;z-index:9999;background:rgba(6,20,33,.94);
  display:none;align-items:center;justify-content:center;padding:24px;
  overflow:auto;cursor:zoom-out;
  opacity:0;transition:opacity .25s ease;
}
.lightbox-overlay.is-open{display:flex;}
.lightbox-overlay.is-visible{opacity:1;}
.lightbox-overlay img{
  max-width:100%;max-height:100%;width:auto;height:auto;
  object-fit:contain;box-shadow:0 20px 60px rgba(0,0,0,.5);
  cursor:zoom-in;transition:max-width .25s ease, max-height .25s ease;
  margin:auto;
}
.lightbox-overlay img.is-zoomed{
  max-width:none;max-height:none;cursor:zoom-out;
}
.lightbox-close{
  position:fixed;top:18px;right:22px;z-index:10000;
  width:44px;height:44px;border-radius:50%;border:1px solid rgba(255,255,255,.3);
  background:rgba(255,255,255,.08);color:#fff;font-size:22px;line-height:1;
  display:flex;align-items:center;justify-content:center;cursor:pointer;
}
.lightbox-close:hover{background:rgba(255,255,255,.18);}
.lightbox-hint{
  position:fixed;bottom:18px;left:50%;transform:translateX(-50%);z-index:10000;
  font-family:var(--font-mono);font-size:11px;letter-spacing:.06em;text-transform:uppercase;
  color:rgba(255,255,255,.55);pointer-events:none;
}
@media (max-width:640px){
  .lightbox-close{top:12px;right:12px;width:38px;height:38px;font-size:18px;}
  .lightbox-hint{display:none;}
}