/* ============================================================
   The Harrington Dental Institute — Elite Flagship Tier
   Shared stylesheet
   ============================================================ */
:root{
  --charcoal:#16140f;
  --charcoal-2:#211e17;
  --cream:#f8f4ea;
  --paper:#fffdf8;
  --gold:#b8935a;
  --gold-light:#d4b57e;
  --gold-dark:#8f6f3f;
  --ink:#1c1a17;
  --grey:#7d7568;
  --line:#e6ddca;
  --radius:4px;
  --radius-lg:2px;
  --shadow:0 30px 60px -24px rgba(20,18,12,.45);
  --font-head:'Cormorant Garamond',Georgia,serif;
  --font-body:'Inter',system-ui,sans-serif;
}
*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;font-family:var(--font-body);color:var(--ink);background:var(--cream);line-height:1.7}
img{max-width:100%;display:block}
a{color:inherit;text-decoration:none}
h1,h2,h3{font-family:var(--font-head);font-weight:600;color:var(--ink);line-height:1.1;margin:0 0 .4em;letter-spacing:.005em}
h1{font-size:clamp(2.6rem,5.2vw,4.4rem);font-weight:600}
h2{font-size:clamp(1.9rem,3.4vw,2.8rem)}
p{color:var(--grey);margin:0 0 1em}
.container{max-width:1180px;margin:0 auto;padding:0 24px}
section{padding:96px 0}
@media (max-width:700px){section{padding:60px 0}}
.eyebrow{font-family:var(--font-body);text-transform:uppercase;letter-spacing:.28em;font-size:.72rem;font-weight:600;color:var(--gold-dark);margin-bottom:16px;display:inline-block}
.section-head{max-width:640px;margin:0 auto 56px;text-align:center}
.rule{width:56px;height:1px;background:var(--gold);margin:0 auto 24px}

.btn{display:inline-flex;align-items:center;gap:10px;padding:15px 32px;font-weight:600;font-size:.82rem;text-transform:uppercase;letter-spacing:.12em;transition:.25s;border:1px solid transparent}
.btn-primary{background:var(--charcoal);color:var(--cream)}
.btn-primary:hover{background:var(--gold-dark);color:#fff}
.btn-gold{background:var(--gold);color:var(--charcoal)}
.btn-gold:hover{background:var(--gold-light)}
.btn-ghost{border-color:var(--charcoal);color:var(--charcoal)}
.btn-ghost:hover{background:var(--charcoal);color:var(--cream)}
.btn-ghost-light{border-color:rgba(248,244,234,.5);color:var(--cream)}
.btn-ghost-light:hover{background:var(--cream);color:var(--charcoal)}

/* Nav */
.nav{position:sticky;top:0;z-index:60;background:rgba(248,244,234,.95);backdrop-filter:blur(6px);border-bottom:1px solid transparent;transition:.2s}
.nav.scrolled{border-color:var(--line)}
.nav-inner{display:flex;align-items:center;justify-content:space-between;height:88px}
.brand{display:flex;align-items:center;gap:12px;font-family:var(--font-head);font-weight:600;font-size:1.3rem;color:var(--ink);letter-spacing:.02em}
.brand-mark{width:38px;height:38px;border:1px solid var(--gold);color:var(--gold-dark);display:grid;place-items:center;font-family:var(--font-head);font-size:1.1rem}
.nav-links{display:flex;gap:34px;list-style:none;margin:0;padding:0}
.nav-links a{font-size:.8rem;text-transform:uppercase;letter-spacing:.1em;font-weight:600;color:var(--ink)}
.nav-links a.active,.nav-links a:hover{color:var(--gold-dark)}
.nav-cta{display:flex;align-items:center;gap:16px}
.nav-toggle{display:none;width:40px;height:40px;place-items:center}
.nav-toggle span,.nav-toggle span::before,.nav-toggle span::after{content:"";display:block;width:20px;height:1px;background:var(--ink);position:relative}
.nav-toggle span::before{position:absolute;top:-6px}
.nav-toggle span::after{position:absolute;top:6px}
@media (max-width:940px){
  .nav-links,.nav-cta .btn{display:none}
  .nav-toggle{display:grid}
  .nav.open .nav-links{display:flex;flex-direction:column;position:absolute;top:88px;left:0;right:0;background:var(--cream);padding:26px;border-top:1px solid var(--line);gap:20px}
}

/* Hero */
.hero{position:relative;min-height:88vh;display:flex;align-items:center;color:var(--cream);overflow:hidden}
.hero::before{content:"";position:absolute;inset:0;background:linear-gradient(180deg,rgba(20,18,12,.55) 0%,rgba(20,18,12,.78) 100%)}
.hero-bg{position:absolute;inset:0;width:100%;height:100%;object-fit:cover;z-index:-1}
.hero-inner{position:relative;z-index:1;max-width:680px}
.hero .eyebrow{color:var(--gold-light)}
.hero h1{color:#fff}
.hero-lead{font-size:1.15rem;color:#e7e0d0;max-width:540px;margin-bottom:36px}
.hero-actions{display:flex;gap:16px;flex-wrap:wrap;margin-bottom:44px}
.hero-meta{display:flex;gap:32px;flex-wrap:wrap;font-size:.85rem;color:#cfc6ae}
.hero-meta strong{display:block;color:var(--gold-light);font-family:var(--font-head);font-size:1.3rem}

/* Page banner */
.page-banner{padding:72px 0 56px;text-align:center;background:var(--charcoal);color:#fff}
.page-banner h1{color:#fff}
.page-banner p{color:#cfc6ae;max-width:600px;margin:0 auto}
.breadcrumb{font-size:.78rem;color:#a9a08a;margin-bottom:18px;text-transform:uppercase;letter-spacing:.1em}
.breadcrumb a{color:#a9a08a;text-decoration:underline}

/* Trust strip */
.trust{background:var(--charcoal-2);color:#e7e0d0;padding:28px 0;border-top:1px solid rgba(184,147,90,.25);border-bottom:1px solid rgba(184,147,90,.25)}
.trust-grid{display:flex;flex-wrap:wrap;justify-content:center;gap:16px 44px;text-align:center;font-size:.78rem;text-transform:uppercase;letter-spacing:.14em}

/* Treatments */
.treatments-grid{display:grid;gap:1px;grid-template-columns:repeat(auto-fit,minmax(270px,1fr));background:var(--line)}
.treatment{background:var(--paper)}
.treatment .num{font-family:var(--font-head);color:var(--gold);font-size:1.1rem;margin-bottom:14px;display:block}
.treatment h3{margin-bottom:10px}
.treatment p{font-size:.92rem;margin:0 0 14px}
.treatment .from{color:var(--gold-dark);font-weight:600;font-size:.8rem;text-transform:uppercase;letter-spacing:.08em}

/* Interactive treatment cards (click-to-expand) */
.treatment-toggle{all:unset;box-sizing:border-box;display:block;width:100%;padding:40px 60px 40px 32px;cursor:pointer;position:relative}
.treatment-toggle:hover{background:rgba(184,147,90,.06)}
.treatment-toggle:focus-visible{outline:2px solid var(--gold);outline-offset:-2px}
.expand-indicator{position:absolute;top:38px;right:28px;width:26px;height:26px;border:1px solid var(--gold);color:var(--gold-dark);display:grid;place-items:center;font-family:var(--font-head);font-size:1.05rem;line-height:1;transition:transform .25s ease,background .25s ease,color .25s ease;flex-shrink:0}
.treatment-toggle[aria-expanded="true"] .expand-indicator{transform:rotate(45deg);background:var(--gold);color:var(--charcoal)}
.treatment-detail{max-height:0;opacity:0;overflow:hidden;padding:0 32px;transition:max-height .4s ease,opacity .3s ease,padding .4s ease}
.treatment-detail.open{max-height:520px;opacity:1;padding:0 32px 36px}
.treatment-detail h4{font-family:var(--font-body);text-transform:uppercase;letter-spacing:.1em;font-size:.72rem;font-weight:600;color:var(--gold-dark);margin:0 0 8px}
.treatment-detail p{font-size:.88rem;margin:0 0 18px}
.treatment-detail .btn{padding:11px 24px;font-size:.74rem}

/* Split / About */
.split{background:var(--paper)}
.split-grid{display:grid;gap:56px;grid-template-columns:1fr}
@media (min-width:940px){.split-grid{grid-template-columns:1fr 1fr;gap:80px;align-items:center}}
.split-img{aspect-ratio:4/5}
.split-img img{width:100%;height:100%;object-fit:cover}
.tick-list{list-style:none;margin:24px 0 0;padding:0;display:grid;gap:18px}
.tick-list li{display:flex;gap:14px;align-items:flex-start;font-size:.95rem;color:var(--ink)}
.tick-list .tick{flex-shrink:0;width:22px;height:22px;border:1px solid var(--gold);color:var(--gold-dark);display:grid;place-items:center;font-size:.7rem;margin-top:2px}

/* Team */
.team-grid{display:grid;gap:36px;grid-template-columns:repeat(auto-fit,minmax(230px,1fr))}
.member-photo{aspect-ratio:4/5;overflow:hidden;margin-bottom:18px}
.member-photo img{width:100%;height:100%;object-fit:cover;transition:transform .5s ease}
.team-grid > div:hover .member-photo img{transform:scale(1.05)}
.member-role{color:var(--gold-dark);font-size:.78rem;text-transform:uppercase;letter-spacing:.08em;font-weight:600}

/* Gallery */
.gallery-grid{display:grid;gap:16px;grid-template-columns:repeat(4,1fr)}
.gallery-grid.gallery-grid-3{grid-template-columns:repeat(3,1fr)}
@media (max-width:900px){.gallery-grid{grid-template-columns:repeat(2,1fr)}.gallery-grid.gallery-grid-3{grid-template-columns:repeat(2,1fr)}}
.gallery-item{aspect-ratio:3/4;overflow:hidden}
.gallery-item img{width:100%;height:100%;object-fit:cover;transition:transform .6s ease}
.gallery-item:hover img{transform:scale(1.07)}

/* Stats */
.stats{background:var(--charcoal);color:#fff}
.stats-grid{display:grid;gap:24px;grid-template-columns:repeat(2,1fr);text-align:center}
@media (min-width:720px){.stats-grid{grid-template-columns:repeat(4,1fr)}}
.stat .num{font-family:var(--font-head);font-size:clamp(2.2rem,4vw,3rem);color:var(--gold-light);font-weight:600;display:block;margin-bottom:8px}
.stat .label{color:#cfc6ae;font-size:.78rem;text-transform:uppercase;letter-spacing:.1em}

/* Testimonials */
.testimonials{background:var(--paper)}
.testi-grid{display:grid;gap:1px;grid-template-columns:repeat(auto-fit,minmax(280px,1fr));background:var(--line)}
.testi{background:var(--paper);padding:34px}
.testi .stars{color:var(--gold);margin-bottom:12px;font-size:.9rem}
.testi blockquote{margin:0 0 16px;font-size:1rem;color:var(--ink);font-family:var(--font-head);font-style:italic;font-size:1.15rem}
.testi cite{font-style:normal;color:var(--gold-dark);font-size:.78rem;text-transform:uppercase;letter-spacing:.08em}

/* FAQ */
.faq{max-width:780px;margin:0 auto}
.faq details{border-bottom:1px solid var(--line);padding:22px 0}
.faq summary{cursor:pointer;font-family:var(--font-head);font-weight:600;color:var(--ink);font-size:1.15rem;list-style:none;display:flex;justify-content:space-between;gap:20px}
.faq summary::-webkit-details-marker{display:none}
.faq summary::after{content:"+";font-size:1.4rem;color:var(--gold-dark)}
.faq details[open] summary::after{content:"\2212"}
.faq details p{margin:14px 0 0}

/* Contact */
.contact{background:var(--charcoal);color:#fff}
.contact h1,.contact h2,.contact .eyebrow{color:#fff}
.contact .eyebrow{color:var(--gold-light)}
.contact-grid{display:grid;gap:48px;grid-template-columns:1fr}
@media (min-width:900px){.contact-grid{grid-template-columns:1.1fr .9fr}}
.form{background:rgba(248,244,234,.05);border:1px solid rgba(184,147,90,.3);padding:36px}
.field{margin-bottom:20px}
.field label{display:block;font-size:.78rem;text-transform:uppercase;letter-spacing:.08em;font-weight:600;color:var(--gold-light);margin-bottom:8px}
.field input,.field select,.field textarea{width:100%;padding:13px 14px;border:1px solid rgba(248,244,234,.25);background:rgba(248,244,234,.04);color:#fff;font:inherit}
.field textarea{min-height:110px;resize:vertical}
.form-success{display:none;background:rgba(184,147,90,.15);border:1px solid var(--gold);color:var(--gold-light);padding:16px;margin-bottom:20px;font-weight:600;font-size:.9rem}
.form-success.show{display:block}
.contact-info ul{list-style:none;padding:0;margin:0}
.contact-info li{padding:14px 0;border-bottom:1px solid rgba(248,244,234,.15);display:flex;justify-content:space-between;gap:16px;font-size:.92rem;color:#cfc6ae}
.contact-info li strong{color:#fff;font-family:var(--font-head);font-weight:600;font-size:1.05rem}

/* Follow us / social row */
.social-block{margin-top:28px}
.social-block > span{display:block;font-size:.78rem;text-transform:uppercase;letter-spacing:.1em;color:#cfc6ae;margin-bottom:14px}
.social-row{display:flex;gap:12px}
.social-row a{width:42px;height:42px;border:1px solid rgba(184,147,90,.4);border-radius:50%;display:grid;place-items:center;color:var(--gold-light);transition:.2s}
.social-row a:hover{background:var(--gold);border-color:var(--gold);color:var(--charcoal);transform:translateY(-2px)}
.social-row svg{width:18px;height:18px}

/* Location card */
.location-card{border:1px solid rgba(184,147,90,.3);margin-top:24px;overflow:hidden}
.location-card img{width:100%;aspect-ratio:4/3;object-fit:cover;display:block}
.location-card .location-caption{padding:16px 18px;font-family:var(--font-head);font-style:italic;color:#cfc6ae;font-size:.92rem;text-align:center;background:linear-gradient(135deg,rgba(184,147,90,.15) 0%,rgba(184,147,90,.05) 100%)}

/* CTA banner */
.cta-banner{background:var(--paper);border:1px solid var(--line);padding:60px 40px;text-align:center}
.cta-banner p{max-width:520px;margin:0 auto 28px}

/* Footer */
.footer{background:var(--charcoal);color:#a9a08a;padding:64px 0 24px;font-size:.88rem;border-top:1px solid rgba(184,147,90,.2)}
.footer a{color:#a9a08a}
.footer a:hover{color:var(--gold-light)}
.footer-grid{display:grid;gap:40px;grid-template-columns:1.4fr repeat(3,1fr);margin-bottom:48px}
@media (max-width:760px){.footer-grid{grid-template-columns:1fr 1fr;gap:32px}.footer-grid > :first-child{grid-column:1/-1}}
.footer h4{color:#fff;font-size:.75rem;text-transform:uppercase;letter-spacing:.12em;margin-bottom:16px}
.footer ul{list-style:none;padding:0;margin:0;display:grid;gap:9px}
.footer-bottom{border-top:1px solid rgba(184,147,90,.2);padding-top:24px;display:flex;justify-content:space-between;flex-wrap:wrap;gap:12px;font-size:.78rem}
.footer-credit a{color:var(--gold-light)}

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

/* ============================================================
   BOOKING WIDGET (luxury styling)
   ============================================================ */
.booking{background:var(--paper)}
.booking-panel{max-width:900px;margin:0 auto;background:var(--paper);border:1px solid var(--line);box-shadow:var(--shadow)}
.booking-steps{display:flex;justify-content:space-between;background:var(--charcoal);padding:30px 34px}
.booking-step{display:flex;align-items:center;gap:10px;color:rgba(248,244,234,.4);font-size:.78rem;font-weight:600;text-transform:uppercase;letter-spacing:.06em}
.booking-step .num{width:28px;height:28px;border:1px solid rgba(248,244,234,.3);display:grid;place-items:center;font-size:.78rem;flex-shrink:0;font-family:var(--font-head)}
.booking-step.active{color:#fff}
.booking-step.active .num{background:var(--gold);border-color:var(--gold);color:var(--charcoal)}
.booking-step.done .num{background:var(--gold);border-color:var(--gold);color:var(--charcoal);font-size:0}
.booking-step.done .num::before{content:'✓';font-size:.78rem}
@media (max-width:760px){.booking-step span.label{display:none}}

.booking-body{padding:40px 34px}
.booking-panel-step{display:none}
.booking-panel-step.active{display:block}
.booking-panel-step h3{margin-bottom:6px}
.booking-panel-step > p{margin-bottom:26px}

.option-grid{display:grid;gap:14px;grid-template-columns:repeat(auto-fit,minmax(230px,1fr))}
.option-card{border:1px solid var(--line);padding:20px;cursor:pointer;transition:.2s;background:var(--paper)}
.option-card:hover{border-color:var(--gold)}
.option-card.selected{border-color:var(--gold);background:rgba(184,147,90,.08)}
.option-card h4{font-family:var(--font-head);font-size:1.1rem;margin-bottom:4px}
.option-card p{font-size:.85rem;margin:0}
.option-card .tag{display:inline-block;margin-top:10px;font-size:.72rem;color:var(--gold-dark);text-transform:uppercase;letter-spacing:.06em;font-weight:600}

.dentist-card{display:flex;gap:14px;align-items:center;border:1px solid var(--line);padding:14px;cursor:pointer;transition:.2s}
.dentist-card:hover{border-color:var(--gold)}
.dentist-card.selected{border-color:var(--gold);background:rgba(184,147,90,.08)}
.dentist-card img{width:56px;height:56px;object-fit:cover;flex-shrink:0}
.dentist-card h4{margin:0;font-family:var(--font-head);font-size:1rem}
.dentist-card p{margin:0;font-size:.8rem}

.date-row{display:flex;gap:10px;overflow-x:auto;padding-bottom:8px;margin-bottom:26px}
.date-chip{flex:0 0 auto;min-width:66px;text-align:center;border:1px solid var(--line);padding:12px 6px;cursor:pointer}
.date-chip .dow{font-size:.68rem;color:var(--grey);text-transform:uppercase}
.date-chip .dom{font-family:var(--font-head);font-size:1.3rem;font-weight:600;color:var(--ink)}
.date-chip:hover{border-color:var(--gold)}
.date-chip.selected{border-color:var(--gold);background:var(--gold)}
.date-chip.selected .dow,.date-chip.selected .dom{color:var(--charcoal)}

.time-grid{display:grid;gap:10px;grid-template-columns:repeat(auto-fill,minmax(86px,1fr))}
.time-chip{border:1px solid var(--line);padding:11px;text-align:center;cursor:pointer;font-size:.86rem;font-weight:600;color:var(--ink)}
.time-chip:hover{border-color:var(--gold)}
.time-chip.selected{border-color:var(--gold);background:var(--gold);color:var(--charcoal)}
.time-chip.unavailable{opacity:.3;cursor:not-allowed;text-decoration:line-through}

.summary-card{background:var(--cream);border:1px solid var(--line);padding:22px;margin-bottom:26px}
.summary-row{display:flex;justify-content:space-between;padding:9px 0;border-bottom:1px solid var(--line);font-size:.92rem}
.summary-row:last-child{border-bottom:none}
.summary-row strong{color:var(--ink);font-family:var(--font-head)}

.booking-nav{display:flex;justify-content:space-between;margin-top:30px}
.btn-back{background:none;border:none;color:var(--grey);font-weight:600;cursor:pointer;padding:12px 8px;text-transform:uppercase;letter-spacing:.08em;font-size:.78rem}
.btn-back:hover{color:var(--ink)}
.btn-back:disabled{opacity:0;pointer-events:none}

.booking-success{text-align:center;padding:20px 0}
.booking-success .check{width:64px;height:64px;border:1px solid var(--gold);color:var(--gold);display:grid;place-items:center;font-size:1.8rem;margin:0 auto 22px}
.booking-ref{display:inline-block;background:var(--cream);border:1px dashed var(--gold);padding:12px 24px;font-family:var(--font-head);font-weight:600;color:var(--ink);margin:14px 0 24px;font-size:1.1rem}

/* ============================================================
   AI CONCIERGE CHATBOT (luxury styling)
   ============================================================ */
.chat-toggle{position:fixed;bottom:28px;right:28px;z-index:80;width:62px;height:62px;border-radius:50%;background:var(--charcoal);color:var(--cream);border:1px solid var(--gold);display:grid;place-items:center;box-shadow:var(--shadow);padding:0;transition:.25s ease}
.chat-toggle:hover{background:var(--gold-dark);color:#fff;transform:translateY(-2px)}
.chat-toggle svg{width:26px;height:26px}
.chat-toggle .dot{position:absolute;top:8px;right:8px;width:11px;height:11px;border-radius:50%;background:var(--gold-light);box-shadow:0 0 0 3px var(--charcoal),0 0 0 5px rgba(212,181,126,.35)}
.chat-toggle:hover .dot{box-shadow:0 0 0 3px var(--gold-dark),0 0 0 5px rgba(212,181,126,.35)}

.chat-panel{position:fixed;bottom:28px;right:28px;z-index:90;width:min(420px,calc(100vw - 32px));height:min(680px,calc(100vh - 90px));background:var(--paper);border:1px solid var(--gold);box-shadow:var(--shadow);display:flex;flex-direction:column;overflow:hidden;transform:translateY(16px) scale(.97);opacity:0;pointer-events:none;transition:width .28s ease,height .28s ease,bottom .28s ease,right .28s ease,opacity .22s ease,transform .22s ease}
.chat-panel.open{transform:none;opacity:1;pointer-events:auto}
.chat-panel.maximized{width:min(720px,calc(100vw - 32px));height:calc(100vh - 32px);bottom:16px;right:16px}
.chat-header{background:var(--charcoal);color:#fff;padding:20px 22px;display:flex;justify-content:space-between;align-items:center;flex-shrink:0;gap:12px}
.chat-header strong{display:block;font-family:var(--font-head);font-size:1.1rem}
.chat-header span{font-size:.74rem;color:#cfc6ae}
.chat-header-actions{display:flex;gap:8px;flex-shrink:0}
.chat-header button{background:rgba(248,244,234,.12);border:1px solid rgba(184,147,90,.4);color:#fff;width:30px;height:30px;cursor:pointer;font-size:1rem;display:grid;place-items:center;flex-shrink:0}
.chat-header button:hover{background:var(--gold-dark);border-color:var(--gold-dark)}
.chat-header button svg{width:15px;height:15px}
.chat-messages{flex:1;overflow-y:auto;padding:20px 18px;display:flex;flex-direction:column;gap:12px;background:var(--cream)}
.msg{max-width:84%;padding:11px 15px;font-size:.88rem;line-height:1.5}
.msg.bot{background:var(--paper);border:1px solid var(--line);align-self:flex-start}
.msg.user{background:var(--charcoal);color:#fff;align-self:flex-end}
.quick-replies{display:flex;flex-wrap:wrap;gap:8px;padding:0 18px 14px;flex-shrink:0;background:var(--cream)}
.quick-replies button{background:var(--paper);border:1px solid var(--line);padding:7px 14px;font-size:.76rem;color:var(--ink);cursor:pointer}
.quick-replies button:hover{border-color:var(--gold);color:var(--gold-dark)}
.chat-form{display:flex;gap:8px;padding:16px 18px;border-top:1px solid var(--line);flex-shrink:0;background:var(--paper)}
.chat-form input{flex:1;border:1px solid var(--line);padding:11px 16px;font:inherit;font-size:.88rem}
.chat-form button{background:var(--charcoal);color:#fff;border:none;padding:0 20px;font-weight:600;cursor:pointer;font-size:.82rem;text-transform:uppercase;letter-spacing:.06em}
@media (max-width:600px){
  .chat-panel{width:100vw;height:100vh;bottom:0;right:0;border-radius:0}
  .chat-panel.maximized{width:100vw;height:100vh;bottom:0;right:0}
}