/* =====================================================================
   BASE — buttons, header, footer, forms, floating widget, breadcrumb
   ===================================================================== */

/* ---------- Buttons ---------- */
.kls-btn{
  display:inline-flex;align-items:center;justify-content:center;gap:9px;
  border:none;border-radius:var(--r-pill);
  font-family:var(--f-body);font-weight:600;font-size:14.5px;line-height:1;
  padding:13px 26px;cursor:pointer;text-decoration:none;
  transition:all .25s ease;white-space:nowrap;
}
.kls-btn .kls-ic{margin:-2px 0}
.kls-btn--lg{padding:17px 34px;font-size:16px}
.kls-btn--sm{padding:11px 20px;font-size:13.5px}
.kls-btn--block{width:100%}

.kls-btn--primary{background:var(--gold);color:#fff;box-shadow:0 8px 22px rgba(212,160,23,.32)}
.kls-btn--primary:hover{background:var(--gold-dark);color:#fff;box-shadow:0 14px 32px rgba(212,160,23,.45);transform:translateY(-2px)}

.kls-btn--navy{background:var(--ocean);color:#fff}
.kls-btn--navy:hover{background:var(--navy);color:#fff;transform:translateY(-2px)}

.kls-btn--ghost{background:transparent;color:var(--ocean);border:1.5px solid var(--ocean)}
.kls-btn--ghost:hover{background:var(--ocean);color:#fff}

.kls-btn--glass{background:rgba(255,255,255,.12);color:#fff;border:1.5px solid rgba(255,255,255,.55);backdrop-filter:blur(6px)}
.kls-btn--glass:hover{background:var(--ocean);color:#fff;border-color:var(--ocean)}

.kls-btn--light{background:transparent;color:#fff;border:1.5px solid rgba(255,255,255,.5)}
.kls-btn--light:hover{background:#fff;color:var(--ocean)}

/* ---------- Badges / chips ---------- */
.kls-badge{display:inline-flex;align-items:center;gap:7px;border-radius:var(--r-pill);font-size:12px;font-weight:600;padding:6px 14px;letter-spacing:.3px}
.kls-badge--gold{background:var(--gold);color:#fff}
.kls-badge--navy{background:var(--ocean);color:#fff}
.kls-badge--turq{background:var(--turq);color:#fff}
.kls-badge--sand{background:var(--sand);color:var(--ocean)}
.kls-badge--glass{background:rgba(255,255,255,.95);color:var(--navy);font-weight:700}

.kls-overline{display:inline-flex;align-items:center;gap:10px;color:var(--turq);font-weight:600;font-size:13.5px;letter-spacing:2px;text-transform:uppercase}

/* ---------- Top bar ---------- */
.kls-topbar{background:var(--navy);color:#cdd9ee;font-size:13px}
.kls-topbar .kls-container{display:flex;justify-content:space-between;align-items:center;gap:16px;padding-top:9px;padding-bottom:9px}
.kls-topbar__left{display:flex;align-items:center;gap:22px;flex-wrap:wrap}
.kls-topbar a,.kls-topbar span{color:inherit}
.kls-topbar__item{display:flex;align-items:center;gap:7px}
.kls-topbar__right{display:flex;align-items:center;gap:14px}
.kls-topbar__hot{display:flex;align-items:center;gap:7px;color:var(--gold)}

/* ---------- Header ---------- */
.kls-header{position:sticky;top:0;z-index:60;background:rgba(255,255,255,.92);backdrop-filter:blur(12px);border-bottom:1px solid var(--line);box-shadow:0 4px 20px rgba(8,43,99,.05)}
.kls-header .kls-container{display:flex;align-items:center;justify-content:space-between;gap:24px;padding-top:14px;padding-bottom:14px}
.kls-nav{display:flex;align-items:center;gap:26px;font-size:15px;font-weight:500}
.kls-nav__menu{display:flex;align-items:center;gap:26px;list-style:none;margin:0;padding:0}
.kls-nav li{list-style:none;margin:0}
.kls-nav a{color:var(--navy);position:relative;white-space:nowrap}
.kls-nav a:hover,.kls-nav .current-menu-item>a,.kls-nav .current_page_item>a{color:var(--gold)}
.kls-nav .current-menu-item>a::after,.kls-nav a.is-active::after{content:"";position:absolute;left:0;right:0;bottom:-6px;height:2px;background:var(--gold);border-radius:2px}
.kls-header__actions{display:flex;align-items:center;gap:14px}

/* burger */
.kls-burger{display:none;width:44px;height:44px;border-radius:var(--r-md);border:1px solid var(--line-2);background:#fff;color:var(--navy);align-items:center;justify-content:center}

/* ---------- Mobile drawer ---------- */
.kls-drawer{position:fixed;inset:0;z-index:200;visibility:hidden;opacity:0;transition:opacity .3s}
.kls-drawer.is-open{visibility:visible;opacity:1}
.kls-drawer__scrim{position:absolute;inset:0;background:rgba(8,43,99,.5);backdrop-filter:blur(2px)}
.kls-drawer__panel{position:absolute;top:0;right:0;height:100%;width:86%;max-width:360px;background:#fff;box-shadow:-10px 0 40px rgba(8,43,99,.2);transform:translateX(100%);transition:transform .35s cubic-bezier(.22,1,.36,1);display:flex;flex-direction:column;padding:22px}
.kls-drawer.is-open .kls-drawer__panel{transform:translateX(0)}
.kls-drawer__head{display:flex;align-items:center;justify-content:space-between;margin-bottom:18px;padding-bottom:18px;border-bottom:1px solid var(--line)}
.kls-drawer__close{width:42px;height:42px;border-radius:var(--r-md);border:1px solid var(--line-2);background:#fff;color:var(--navy);display:flex;align-items:center;justify-content:center}
.kls-drawer__nav .kls-nav__menu{display:block;list-style:none;margin:0;padding:0}
.kls-drawer__nav li{list-style:none}
.kls-drawer__nav a{display:block;padding:14px 6px;font-size:16px;font-weight:600;color:var(--navy);border-bottom:1px solid var(--line)}
.kls-drawer__nav a:hover{color:var(--gold)}
.kls-drawer__cta{margin-top:auto;padding-top:18px}

/* ---------- Footer ---------- */
.kls-footer{background:var(--navy);color:#aebfd9}
.kls-footer__grid{display:grid;grid-template-columns:1.6fr 1fr 1fr 1.3fr;gap:48px;padding-top:70px}
.kls-footer__brand .kls-brand{margin-bottom:18px}
.kls-footer__about{font-size:14.5px;line-height:1.7;color:#9fb2cf;margin-bottom:22px;max-width:300px}
.kls-footer__socials{display:flex;gap:11px}
.kls-footer__socials a{width:40px;height:40px;border-radius:var(--r-sm);background:rgba(255,255,255,.08);display:flex;align-items:center;justify-content:center;color:#cdd9ee}
.kls-footer__socials a:hover{background:var(--gold);color:#fff}
.kls-footer__col h3{font-family:var(--f-head);font-weight:700;font-size:16px;color:#fff;margin-bottom:18px}
.kls-footer__col li{margin-bottom:12px}
.kls-footer__col a{font-size:14.5px;color:#9fb2cf}
.kls-footer__col a:hover{color:#fff}
.kls-footer__contact{display:flex;align-items:flex-start;gap:11px;font-size:14.5px;color:#9fb2cf;margin-bottom:14px}
.kls-footer__contact .kls-ic{margin-top:2px}
.kls-footer__bar{margin-top:54px;padding:26px 0;border-top:1px solid rgba(255,255,255,.1);display:flex;justify-content:space-between;align-items:center;gap:16px;flex-wrap:wrap;font-size:13.5px;color:#7e93b5}
.kls-footer__bar a{color:#7e93b5}
.kls-footer__bar a:hover{color:#fff}
.kls-footer__legal{display:flex;gap:24px;flex-wrap:wrap}

/* ---------- Floating contact ---------- */
.kls-fab{position:fixed;right:24px;bottom:24px;z-index:80;display:flex;flex-direction:column;gap:13px}
.kls-fab a{width:56px;height:56px;border-radius:var(--r-pill);display:flex;align-items:center;justify-content:center;color:#fff;transition:transform .25s}
.kls-fab a:hover{transform:scale(1.08);color:#fff}
.kls-fab__chat{background:var(--turq);box-shadow:0 10px 28px rgba(20,184,196,.5)}
.kls-fab__phone{background:var(--gold);box-shadow:0 10px 28px rgba(212,160,23,.5)}

/* ---------- Breadcrumb ---------- */
.kls-crumb ol{display:flex;align-items:center;flex-wrap:wrap;gap:4px;font-size:13.5px;color:var(--muted)}
.kls-crumb li{display:flex;align-items:center;gap:4px}
.kls-crumb a{color:var(--muted)}
.kls-crumb a:hover{color:var(--gold)}
.kls-crumb [aria-current]{color:var(--ink);font-weight:600}
.kls-crumb .kls-ic{color:var(--muted-2)}

/* ---------- Forms ---------- */
.kls-field{margin-bottom:16px}
.kls-label{display:block;font-size:13.5px;font-weight:600;color:var(--navy);margin-bottom:7px}
.kls-input,.kls-select,.kls-textarea{
  width:100%;border:1.5px solid var(--line-2);border-radius:var(--r-md);
  padding:13px 15px;font-size:14.5px;color:var(--ink);background:#fff;outline:none;transition:border-color .2s,box-shadow .2s;
}
.kls-input:focus,.kls-select:focus,.kls-textarea:focus{border-color:var(--ocean);box-shadow:0 0 0 3px rgba(11,61,145,.1)}
.kls-textarea{min-height:110px;resize:vertical}
.kls-input.has-error,.kls-select.has-error,.kls-textarea.has-error{border-color:var(--danger)}
.kls-err{display:none;color:var(--danger);font-size:12.5px;margin-top:6px}
/* Custom select — dropdown tự dựng thay danh sách xổ của <select> gốc */
.kls-sel{position:relative}
.kls-sel .kls-select{display:none}
.kls-sel__btn{width:100%;display:flex;align-items:center;justify-content:space-between;gap:10px;border:1.5px solid var(--line-2);border-radius:var(--r-md);padding:13px 15px;font-size:14.5px;color:var(--ink);background:#fff;cursor:pointer;text-align:left;transition:border-color .2s,box-shadow .2s}
.kls-sel__btn:hover{border-color:var(--ocean)}
.kls-sel.is-open .kls-sel__btn{border-color:var(--ocean);box-shadow:0 0 0 3px rgba(11,61,145,.1)}
.kls-sel__val{flex:1;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.kls-sel__chev{color:var(--muted);flex-shrink:0;transition:transform .25s}
.kls-sel.is-open .kls-sel__chev{transform:rotate(180deg)}
.kls-sel__list{position:absolute;top:calc(100% + 6px);left:0;right:0;background:#fff;border:1px solid var(--line);border-radius:var(--r-md);box-shadow:var(--sh-pop);z-index:30;padding:6px;max-height:264px;overflow-y:auto;opacity:0;visibility:hidden;transform:translateY(-6px);transition:opacity .18s ease,transform .18s ease,visibility .18s}
.kls-sel.is-open .kls-sel__list{opacity:1;visibility:visible;transform:translateY(0)}
.kls-sel__opt{display:block;width:100%;text-align:left;border:none;background:none;padding:11px 13px;border-radius:var(--r-sm);font-size:14.5px;color:var(--ink);cursor:pointer;transition:background .15s}
.kls-sel__opt:hover{background:var(--sand)}
.kls-sel__opt.is-sel{background:var(--sand);color:var(--ocean);font-weight:600}
.kls-err.show{display:block}

/* Toast */
.kls-toast-wrap{position:fixed;left:50%;bottom:30px;transform:translateX(-50%);z-index:300;display:flex;flex-direction:column;gap:10px;align-items:center;pointer-events:none}
.kls-toast{background:var(--navy);color:#fff;padding:13px 22px;border-radius:var(--r-pill);font-size:14px;font-weight:500;box-shadow:var(--sh-elev);display:flex;align-items:center;gap:9px;animation:ksFadeUp .35s both}
.kls-toast--ok{background:var(--success)}
.kls-toast--err{background:var(--danger)}

/* ---------- Responsive header/footer ---------- */
@media (max-width:980px){
  .kls-nav{display:none}
  .kls-header__actions .kls-btn{display:none}
  .kls-burger{display:flex}
  .kls-footer__grid{grid-template-columns:1fr 1fr;gap:34px}
  .kls-topbar__left{gap:14px}
}
@media (max-width:560px){
  :root{--pad:18px}
  .kls-footer__grid{grid-template-columns:1fr}
  .kls-topbar{display:none}
  .kls-fab a{width:50px;height:50px}
  .kls-brand-tag{display:none}
  .kls-brand-name{font-size:14px;letter-spacing:0;white-space:nowrap}
  .kls-header .kls-container{gap:12px;overflow:hidden}
  .kls-brand{gap:8px;min-width:0}
  .kls-header__actions{gap:10px;flex-shrink:0}
}