/* =====================================================================
   BINTANKU INDONESIA — Pulau Bintan, Kepulauan Riau
   Direction: tropical editorial. Ocean teal + warm sand + sunset coral.
   Faces: Bricolage Grotesque (display) / DM Sans (body) / DM Mono (tags)
   Signature: layered coastline waves + island coordinate tag
   ===================================================================== */

:root{
  --ocean:#0a4a59;      /* deep ocean — dark sections, headings */
  --ocean-2:#0d5f73;
  --turq:#12a7b8;       /* bright sea — primary accent */
  --turq-l:#46c7d4;
  --coral:#f4663a;      /* sunset — CTA accent */
  --coral-d:#df5026;
  --gold:#f0b323;       /* banner gold */
  --sand:#faf3e7;       /* warm page surface */
  --sand-2:#f2e7d2;
  --ink:#10302f;        /* text near-black teal */
  --slate:#4d6b6e;      /* muted body */
  --line:#e7dcc6;       /* warm hairline */
  --white:#ffffff;

  --maxw:1180px;
  --radius:22px;
  --radius-sm:14px;
  --shadow-sm:0 2px 4px rgba(10,74,89,.05), 0 10px 24px rgba(10,74,89,.07);
  --shadow-md:0 18px 44px rgba(10,74,89,.13);
  --shadow-lg:0 30px 70px rgba(10,74,89,.22);
  --ease:cubic-bezier(.22,.61,.36,1);
}

*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{
  font-family:"DM Sans",system-ui,-apple-system,Segoe UI,Roboto,sans-serif;
  color:var(--slate);background:var(--sand);line-height:1.7;font-size:16.5px;
  -webkit-font-smoothing:antialiased;text-rendering:optimizeLegibility;overflow-x:hidden;
}
img{max-width:100%;display:block}
a{color:inherit;text-decoration:none}
h1,h2,h3,h4{font-family:"Bricolage Grotesque","DM Sans",sans-serif;color:var(--ink);line-height:1.04;font-weight:800;letter-spacing:-.02em}
strong{color:var(--ink);font-weight:700}
.container{width:100%;max-width:var(--maxw);margin-inline:auto;padding-inline:24px}
.mono{font-family:"DM Mono",ui-monospace,monospace}

/* coordinate / travel tag */
.tag{
  font-family:"DM Mono",monospace;font-size:.72rem;font-weight:500;letter-spacing:.12em;
  text-transform:uppercase;color:var(--turq);display:inline-flex;align-items:center;gap:.55rem;
}
.tag::before{content:"";width:7px;height:7px;border-radius:50%;background:var(--coral);box-shadow:0 0 0 4px rgba(244,102,58,.18)}
.tag.on-dark{color:var(--gold)}

/* buttons */
.btn{display:inline-flex;align-items:center;gap:.55rem;font-family:"DM Sans",sans-serif;
  font-weight:700;font-size:.96rem;padding:.85rem 1.5rem;border-radius:999px;border:2px solid transparent;
  cursor:pointer;transition:transform .25s var(--ease),box-shadow .25s var(--ease),background .25s,color .25s,border-color .25s;white-space:nowrap}
.btn svg{width:18px;height:18px}
.btn-primary{background:var(--coral);color:#fff;box-shadow:0 10px 24px rgba(244,102,58,.35)}
.btn-primary:hover{transform:translateY(-2px);box-shadow:0 16px 32px rgba(244,102,58,.45);background:var(--coral-d)}
.btn-ghost{background:transparent;color:#fff;border-color:rgba(255,255,255,.5)}
.btn-ghost:hover{background:rgba(255,255,255,.14);transform:translateY(-2px)}
.btn-dark{background:var(--ocean);color:#fff}
.btn-dark:hover{transform:translateY(-2px);background:var(--ocean-2)}
.btn-outline{background:transparent;color:var(--ocean);border-color:var(--line)}
.btn-outline:hover{border-color:var(--ocean);transform:translateY(-2px)}

/* =====================================================================
   NAVBAR
   ===================================================================== */
.site-header{position:sticky;top:0;z-index:60;background:rgba(250,243,231,.85);
  backdrop-filter:saturate(160%) blur(12px);-webkit-backdrop-filter:saturate(160%) blur(12px);
  border-bottom:1px solid var(--line)}
.nav{display:flex;align-items:center;justify-content:space-between;height:76px;gap:1.4rem}
.brand{display:flex;align-items:center;gap:.7rem}
.brand img{width:46px;height:46px;object-fit:contain}
.brand-text{display:flex;flex-direction:column;line-height:1.02}
.brand-text .b1{font-family:"Bricolage Grotesque",sans-serif;font-size:1.18rem;font-weight:800;color:var(--ink);letter-spacing:-.01em}
.brand-text .b2{font-family:"DM Mono",monospace;font-size:.62rem;letter-spacing:.2em;text-transform:uppercase;color:var(--turq)}
.nav-links{display:flex;align-items:center;gap:.2rem}
.nav-links a{position:relative;padding:.55rem .9rem;border-radius:10px;font-weight:600;font-size:.95rem;color:#33514f;transition:color .2s,background .2s}
.nav-links a:hover{color:var(--ocean);background:rgba(18,167,184,.1)}
.nav-links a.active{color:var(--ocean)}
.nav-links a.active::after{content:"";position:absolute;left:.9rem;right:.9rem;bottom:.3rem;height:2.5px;background:var(--coral);border-radius:3px}
.nav-cta{display:flex;align-items:center;gap:.8rem}
.nav-toggle{display:none;width:46px;height:46px;border:1px solid var(--line);border-radius:12px;background:#fff;cursor:pointer;align-items:center;justify-content:center}
.nav-toggle span,.nav-toggle span::before,.nav-toggle span::after{content:"";display:block;width:20px;height:2px;background:var(--ink);border-radius:2px;position:relative;transition:.25s var(--ease)}
.nav-toggle span::before{position:absolute;top:-6px}
.nav-toggle span::after{position:absolute;top:6px}
body.menu-open .nav-toggle span{background:transparent}
body.menu-open .nav-toggle span::before{transform:rotate(45deg);top:0}
body.menu-open .nav-toggle span::after{transform:rotate(-45deg);top:0}

/* =====================================================================
   HERO — illustrated ocean
   ===================================================================== */
.hero{position:relative;overflow:hidden;color:#eafafb;
  background:radial-gradient(900px 480px at 78% -8%, rgba(18,167,184,.55), transparent 60%),
             linear-gradient(165deg,#0a4a59 0%,#0d5f73 55%,#0a4150 100%)}
.hero .sun{position:absolute;top:8%;right:10%;width:120px;height:120px;border-radius:50%;
  background:radial-gradient(circle,#ffd66e,#f0b323 60%,rgba(240,179,35,0) 72%);opacity:.85;filter:blur(.3px)}
.hero-inner{position:relative;z-index:3;padding:5rem 0 9rem;max-width:760px}
.hero .tag{color:var(--gold)}
.hero h1{color:#fff;font-size:clamp(2.6rem,6vw,4.6rem);line-height:.98;margin:1.1rem 0 1.2rem;letter-spacing:-.03em}
.hero h1 em{font-style:normal;color:var(--gold)}
.hero p.lead{font-size:1.18rem;color:#bfe6ea;max-width:46ch;margin-bottom:2rem}
.hero-actions{display:flex;flex-wrap:wrap;gap:.9rem}
/* layered waves + boat at hero bottom */
.hero-scene{position:absolute;left:0;right:0;bottom:-1px;z-index:2;pointer-events:none;line-height:0}
.hero-scene svg{width:100%;height:auto;display:block}
.hero-boat{position:absolute;z-index:2;right:11%;bottom:90px;width:128px;animation:bob 6s ease-in-out infinite}
@keyframes bob{0%,100%{transform:translateY(0) rotate(-1.5deg)}50%{transform:translateY(-10px) rotate(1.5deg)}}

/* island stat ribbon */
.ribbon{position:relative;z-index:4;margin-top:-3.4rem}
.ribbon-inner{background:#fff;border:1px solid var(--line);border-radius:var(--radius);box-shadow:var(--shadow-md);
  display:grid;grid-template-columns:repeat(4,1fr);overflow:hidden}
.ribbon .r{padding:1.6rem 1.5rem;border-right:1px solid var(--line)}
.ribbon .r:last-child{border-right:0}
.ribbon .num{font-family:"Bricolage Grotesque",sans-serif;font-size:2rem;font-weight:800;color:var(--ocean);line-height:1}
.ribbon .num span{color:var(--coral);font-size:1.1rem}
.ribbon .lbl{font-family:"DM Mono",monospace;font-size:.7rem;letter-spacing:.1em;text-transform:uppercase;color:var(--slate);margin-top:.4rem}

/* =====================================================================
   SECTIONS
   ===================================================================== */
.section{padding:6rem 0;position:relative}
.section.tight{padding:4rem 0}
.section.ocean{background:var(--ocean);color:#cfe9ec}
.section.ocean h2,.section.ocean h3{color:#fff}
.section.cream{background:var(--sand-2)}
.section-head{max-width:640px;margin-bottom:3rem}
.section-head.center{margin-inline:auto;text-align:center}
.section-head h2{font-size:clamp(1.9rem,3.6vw,2.8rem);margin:.9rem 0 .8rem}
.section-head p{font-size:1.06rem}
.section.ocean .section-head p{color:#a9d3d8}

/* wave dividers */
.wavesep{display:block;width:100%;height:auto;line-height:0}

/* destination cards (illustrated gradient) */
.dest-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:1.6rem}
.dest{position:relative;border-radius:var(--radius);overflow:hidden;min-height:320px;display:flex;flex-direction:column;justify-content:flex-end;
  padding:1.6rem;color:#fff;box-shadow:var(--shadow-sm);transition:transform .35s var(--ease),box-shadow .35s var(--ease)}
.dest:hover{transform:translateY(-7px);box-shadow:var(--shadow-md)}
.dest .scene{position:absolute;inset:0;z-index:0}
.dest .scene svg{width:100%;height:100%;display:block}
.dest .scene img{width:100%;height:100%;object-fit:cover;display:block}
.dest::after{content:"";position:absolute;inset:0;z-index:1;background:linear-gradient(to top,rgba(8,49,60,.78) 0%,rgba(8,49,60,.12) 55%,transparent 100%)}
.dest .body{position:relative;z-index:2}
.dest .k{font-family:"DM Mono",monospace;font-size:.66rem;letter-spacing:.14em;text-transform:uppercase;color:var(--gold);display:block;margin-bottom:.4rem}
.dest h3{color:#fff;font-size:1.4rem;margin-bottom:.3rem}
.dest p{color:#d9eef0;font-size:.92rem;margin:0}

/* experience list */
.exp-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:1.4rem}
.exp{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:1.9rem;box-shadow:var(--shadow-sm);
  display:grid;grid-template-columns:58px 1fr;gap:1.3rem;align-items:start;transition:transform .3s var(--ease),box-shadow .3s var(--ease)}
.exp:hover{transform:translateY(-5px);box-shadow:var(--shadow-md)}
.exp .ico{width:58px;height:58px;border-radius:16px;display:grid;place-items:center;color:#fff;
  background:linear-gradient(150deg,var(--turq),var(--ocean))}
.exp .ico svg{width:26px;height:26px}
.exp h3{font-size:1.2rem;margin-bottom:.4rem}
.exp p{font-size:.95rem;margin:0}

/* gateway / access feature */
.gateway{display:grid;grid-template-columns:1.05fr .95fr;gap:0;border-radius:var(--radius);overflow:hidden;
  background:#fff;border:1px solid var(--line);box-shadow:var(--shadow-md)}
.gateway .pic{position:relative;min-height:340px}
.gateway .pic img{position:absolute;inset:0;width:100%;height:100%;object-fit:cover}
.gateway .txt{padding:2.6rem}
.gateway .txt h2{font-size:clamp(1.6rem,3vw,2.2rem);margin:.7rem 0 1rem}
.checklist{list-style:none;display:grid;gap:.8rem;margin-top:1.1rem}
.checklist li{display:flex;gap:.7rem;font-size:.97rem;color:var(--slate)}
.checklist li svg{width:20px;height:20px;flex:none;color:var(--turq);margin-top:.2rem}

/* CTA band */
.cta-band{position:relative;overflow:hidden;border-radius:28px;padding:3.4rem;color:#fff;
  background:radial-gradient(600px 320px at 92% 0%, rgba(244,102,58,.55), transparent 60%),linear-gradient(135deg,var(--ocean),#072f3a);box-shadow:var(--shadow-lg)}
.cta-band h2{color:#fff;font-size:clamp(1.7rem,3vw,2.4rem);margin-bottom:.7rem}
.cta-band p{color:#bfe6ea;max-width:54ch;margin-bottom:1.7rem}

/* =====================================================================
   INNER PAGE HERO
   ===================================================================== */
.page-hero{position:relative;overflow:hidden;color:#eafafb;
  background:radial-gradient(700px 360px at 85% -20%, rgba(18,167,184,.5), transparent 60%),linear-gradient(160deg,#0a4a59,#0d5f73);
  padding:3.4rem 0 5rem}
.page-hero .inner{position:relative;z-index:3}
.breadcrumb{font-family:"DM Mono",monospace;font-size:.74rem;letter-spacing:.1em;color:#8fc6cd;margin-bottom:1rem}
.breadcrumb a:hover{color:#fff}.breadcrumb .sep{opacity:.5;margin:0 .5rem}
.page-hero h1{color:#fff;font-size:clamp(2.1rem,4vw,3.1rem);letter-spacing:-.02em}
.page-hero p{color:#bfe6ea;max-width:62ch;margin-top:.8rem;font-size:1.06rem}
.page-hero .hero-scene{bottom:-1px}

/* prose */
.prose{max-width:780px}
.prose h2{font-size:1.6rem;margin:2.2rem 0 .9rem}
.prose h3{font-size:1.2rem;margin:1.6rem 0 .6rem}
.prose p{margin-bottom:1rem}
.prose ul,.prose ol{margin:0 0 1.1rem 1.2rem;display:grid;gap:.5rem}
.prose .updated{font-family:"DM Mono",monospace;font-size:.74rem;letter-spacing:.1em;color:var(--turq);text-transform:uppercase}
.prose a{color:var(--ocean);font-weight:600;border-bottom:1px solid var(--line)}
.prose a:hover{border-color:var(--ocean)}

/* contact */
.contact-grid{display:grid;grid-template-columns:1fr 1fr;gap:2.2rem;align-items:start}
.contact-list{display:grid;gap:1rem}
.contact-card{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:1.4rem 1.5rem;display:flex;gap:1.1rem;align-items:flex-start;box-shadow:var(--shadow-sm);transition:transform .25s var(--ease),border-color .25s}
.contact-card:hover{transform:translateY(-3px);border-color:#cfe7d9}
.contact-card .ico{width:48px;height:48px;border-radius:14px;flex:none;display:grid;place-items:center;color:#fff;background:linear-gradient(150deg,var(--turq),var(--ocean))}
.contact-card .ico svg{width:22px;height:22px}
.contact-card h3{font-size:1rem;margin-bottom:.2rem}
.contact-card p{font-size:.94rem;margin:0}
.contact-card a{color:var(--ocean);font-weight:600}
.map-wrap{border-radius:var(--radius);overflow:hidden;border:1px solid var(--line);box-shadow:var(--shadow-sm);min-height:380px}
.map-wrap img{width:100%;height:100%;min-height:380px;object-fit:cover;display:block}
.note{background:#fff6e8;border:1px solid #f3e0b0;border-radius:var(--radius-sm);padding:1rem 1.2rem;font-size:.9rem;color:#7a5b12;display:flex;gap:.7rem;align-items:flex-start}
.note svg{width:20px;height:20px;flex:none;color:#c79a23;margin-top:.1rem}

/* =====================================================================
   FOOTER
   ===================================================================== */
.site-footer{background:#072f3a;color:#9cc4cb;padding:4.5rem 0 0}
.foot-top{display:grid;grid-template-columns:1.6fr 1fr 1fr 1fr;gap:2.2rem;padding-bottom:2.6rem}
.foot-brand .brand .brand-text .b1{color:#fff}
.foot-brand p{font-size:.93rem;color:#84b1ba;margin-top:1rem;max-width:34ch}
.official-card{display:inline-flex;align-items:center;gap:.8rem;background:var(--sand);border-radius:14px;padding:.7rem 1rem;margin-top:1.2rem}
.official-card img{height:34px;width:auto;object-fit:contain}
.foot-col h4{color:#fff;font-family:"DM Mono",monospace;font-size:.74rem;letter-spacing:.14em;text-transform:uppercase;font-weight:500;margin-bottom:1rem}
.foot-col a{display:block;font-size:.93rem;color:#9cc4cb;padding:.32rem 0;transition:color .2s}
.foot-col a:hover{color:#fff}
.foot-bottom{border-top:1px solid rgba(255,255,255,.08);display:flex;justify-content:space-between;flex-wrap:wrap;gap:1rem;padding:1.4rem 0 2.4rem;font-size:.86rem;color:#6f9aa3}
.foot-bottom a{color:#9cc4cb}.foot-bottom a:hover{color:#fff}
.foot-bottom .legal{display:flex;gap:1.2rem}

/* reveal */
.reveal{opacity:0;transform:translateY(24px);transition:opacity .7s var(--ease),transform .7s var(--ease)}
.reveal.in{opacity:1;transform:none}

/* =====================================================================
   RESPONSIVE
   ===================================================================== */
@media (max-width:980px){
  .ribbon-inner{grid-template-columns:1fr 1fr}.ribbon .r:nth-child(2){border-right:0}
  .dest-grid{grid-template-columns:1fr 1fr}
  .exp-grid{grid-template-columns:1fr}
  .gateway{grid-template-columns:1fr}.gateway .pic{min-height:260px}
  .contact-grid{grid-template-columns:1fr}
  .foot-top{grid-template-columns:1fr 1fr}
  .hero-boat{width:96px;right:6%}
}
@media (max-width:760px){
  .nav-links,.nav-cta .btn{display:none}
  .nav-toggle{display:flex}
  .nav-links{position:fixed;inset:76px 0 auto 0;flex-direction:column;align-items:stretch;gap:0;background:var(--sand);
    border-bottom:1px solid var(--line);padding:.6rem 24px 1.2rem;box-shadow:var(--shadow-md);
    transform:translateY(-12px);opacity:0;pointer-events:none;transition:.25s var(--ease)}
  body.menu-open .nav-links{display:flex;transform:none;opacity:1;pointer-events:auto}
  .nav-links a{padding:.9rem .2rem;border-bottom:1px solid var(--line);border-radius:0}
  .nav-links a.active::after{display:none}
  .section{padding:4rem 0}
  .dest-grid{grid-template-columns:1fr}
  .cta-band{padding:2.2rem}
  .hero-boat{display:none}
}
@media (max-width:520px){
  .ribbon-inner{grid-template-columns:1fr}.ribbon .r{border-right:0;border-bottom:1px solid var(--line)}
  .ribbon .r:last-child{border-bottom:0}
  .foot-top{grid-template-columns:1fr}
}
@media (prefers-reduced-motion:reduce){
  *{animation-duration:.001ms!important;animation-iteration-count:1!important;transition-duration:.001ms!important;scroll-behavior:auto!important}
  .reveal{opacity:1;transform:none}
}