/* ============================================================
   Riverside Dental Studio — Premium Tier
   Shared stylesheet
   ============================================================ */
:root{
  --forest:#243b30;
  --forest-light:#345645;
  --terracotta:#c1694f;
  --terracotta-dark:#9c4f39;
  --cream:#faf4ec;
  --blush:#f2e1d3;
  --ink:#2e2a24;
  --grey:#7a7266;
  --line:#e6dccb;
  --radius:18px;
  --radius-sm:10px;
  --shadow:0 20px 46px -22px rgba(36,59,48,.35);
  --font-head:'Lora',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:1.65}
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(--forest);line-height:1.18;margin:0 0 .5em}
h1{font-size:clamp(2.2rem,4.4vw,3.4rem)}
h2{font-size:clamp(1.6rem,3vw,2.3rem)}
p{color:var(--grey);margin:0 0 1em}
.container{max-width:1160px;margin:0 auto;padding:0 24px}
section{padding:84px 0}
@media (max-width:700px){section{padding:56px 0}}
.eyebrow{font-family:var(--font-head);font-style:italic;color:var(--terracotta-dark);font-size:1.05rem;margin-bottom:10px;display:block}
.section-head{max-width:620px;margin:0 auto 48px;text-align:center}

.btn{display:inline-flex;align-items:center;gap:8px;padding:14px 28px;border-radius:999px;font-weight:600;font-size:.95rem;transition:.2s}
.btn-primary{background:var(--terracotta);color:#fff}
.btn-primary:hover{background:var(--terracotta-dark)}
.btn-ghost{border:1.5px solid var(--forest);color:var(--forest)}
.btn-ghost:hover{background:var(--forest);color:#fff}
.btn-sm{padding:10px 20px;font-size:.82rem}

/* Nav */
.nav{position:sticky;top:0;z-index:50;background:rgba(250,244,236,.94);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:82px}
.brand{display:flex;align-items:center;gap:10px;font-family:var(--font-head);font-weight:700;font-size:1.2rem;color:var(--forest)}
.brand-mark{width:36px;height:36px;border-radius:50%;background:var(--forest);color:#fff;display:grid;place-items:center;font-family:var(--font-head)}
.nav-links{display:flex;gap:30px;list-style:none;margin:0;padding:0}
.nav-links a{font-size:.92rem;font-weight:500;color:var(--forest)}
.nav-links a.active,.nav-links a:hover{color:var(--terracotta-dark)}
.nav-cta{display:flex;align-items:center;gap:16px}
.nav-toggle{display:none;width:40px;height:40px;place-items:center;border-radius:8px}
.nav-toggle span,.nav-toggle span::before,.nav-toggle span::after{content:"";display:block;width:20px;height:2px;background:var(--forest);position:relative}
.nav-toggle span::before{position:absolute;top:-6px}
.nav-toggle span::after{position:absolute;top:6px}
@media (max-width:860px){
  .nav-links,.nav-cta .btn{display:none}
  .nav-toggle{display:grid}
  .nav.open .nav-links{display:flex;flex-direction:column;position:absolute;top:82px;left:0;right:0;background:var(--cream);padding:24px;border-top:1px solid var(--line);gap:18px}
}

/* Hero */
.hero{padding:70px 0 90px}
.hero-grid{display:grid;grid-template-columns:1fr;gap:48px;align-items:center}
@media (min-width:940px){.hero-grid{grid-template-columns:1.05fr .95fr;gap:64px}}
.hero-lead{font-size:1.1rem;max-width:480px}
.hero-actions{display:flex;gap:14px;flex-wrap:wrap;margin:28px 0}
.hero-meta{display:flex;gap:26px;flex-wrap:wrap;font-size:.85rem;color:var(--grey)}
.hero-meta strong{display:block;color:var(--forest);font-family:var(--font-head);font-size:1.05rem}
.hero-visual{border-radius:var(--radius);overflow:hidden;aspect-ratio:4/5;box-shadow:var(--shadow);position:relative}
.hero-visual img{width:100%;height:100%;object-fit:cover;transition:transform .5s ease}
.hero-visual:hover img{transform:scale(1.04)}
.hero-badge{position:absolute;bottom:20px;left:20px;background:#fff;padding:14px 18px;border-radius:var(--radius-sm);box-shadow:var(--shadow);font-size:.85rem}
.hero-badge strong{display:block;color:var(--forest);font-family:var(--font-head)}

/* Page banner */
.page-banner{padding:64px 0 48px;text-align:center}
.page-banner p{max-width:600px;margin:0 auto}
.breadcrumb{font-size:.8rem;color:var(--grey);margin-bottom:16px}
.breadcrumb a{color:var(--grey);text-decoration:underline}

/* Trust strip */
.trust{background:var(--forest);color:#fff;padding:26px 0}
.trust-grid{display:flex;flex-wrap:wrap;justify-content:center;gap:14px 40px;text-align:center;font-family:var(--font-head);font-size:.9rem}

/* Services */
.services-grid{display:grid;gap:22px;grid-template-columns:repeat(auto-fit,minmax(250px,1fr))}
.service{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:32px 28px;transition:.25s}
.service:hover{border-color:var(--terracotta);transform:translateY(-3px);box-shadow:var(--shadow)}
.service-icon{width:50px;height:50px;border-radius:12px;background:var(--blush);color:var(--terracotta-dark);display:grid;place-items:center;margin-bottom:16px;font-size:1.2rem;transition:.25s}
.service:hover .service-icon{background:var(--terracotta);color:#fff}
.service h3{font-size:1.15rem;margin-bottom:6px}
.service p{font-size:.92rem;margin:0}
.service .from{color:var(--terracotta-dark);font-family:var(--font-head);font-style:italic;font-size:.85rem;margin-top:12px;display:block}

/* Interactive service cards (services.html) */
.service[role="button"]{cursor:pointer;outline:none}
.service[role="button"]:focus-visible{outline:2.5px solid var(--terracotta);outline-offset:3px}
.service-hint{display:flex;align-items:center;gap:5px;margin-top:14px;font-size:.78rem;font-weight:600;color:var(--terracotta-dark)}
.service-hint .chev{display:inline-block;transition:transform .25s ease;font-size:.7rem}
.service[aria-expanded="true"] .service-hint .chev{transform:rotate(180deg)}
.service-detail{max-height:0;overflow:hidden;transition:max-height .35s ease,margin-top .35s ease;margin-top:0}
.service[aria-expanded="true"] .service-detail{max-height:420px;margin-top:16px}
.service-detail-inner{border-top:1px solid var(--line);padding-top:16px}
.service-detail ul{margin:0 0 16px;padding-left:18px;color:var(--grey);font-size:.88rem;display:grid;gap:6px}
.service-detail p{font-size:.88rem}

/* About split */
.about-split{background:var(--blush)}
.about-grid{display:grid;gap:48px;grid-template-columns:1fr}
@media (min-width:900px){.about-grid{grid-template-columns:1fr 1fr;align-items:center}}
.about-img{border-radius:var(--radius);overflow:hidden;aspect-ratio:5/4}
.about-img img{width:100%;height:100%;object-fit:cover;transition:transform .5s ease}
.about-img:hover img{transform:scale(1.05)}
.tick-list{list-style:none;margin:22px 0 0;padding:0;display:grid;gap:14px}
.tick-list li{display:flex;gap:12px;align-items:flex-start;font-size:.95rem}
.tick-list .tick{flex-shrink:0;width:22px;height:22px;border-radius:50%;background:var(--terracotta);color:#fff;display:grid;place-items:center;font-size:.75rem;margin-top:2px}

/* Team */
.team-grid{display:grid;gap:32px;grid-template-columns:repeat(auto-fit,minmax(230px,1fr))}
.member-photo{aspect-ratio:4/5;border-radius:var(--radius);overflow:hidden;margin-bottom:18px;background:var(--blush);box-shadow:var(--shadow);transition:.25s}
.member-photo img{width:100%;height:100%;object-fit:cover;transition:transform .5s ease}
.team-grid > div:hover .member-photo{transform:translateY(-4px)}
.team-grid > div:hover .member-photo img{transform:scale(1.06)}
.member-role{color:var(--terracotta-dark);font-size:.85rem;font-family:var(--font-head);font-style:italic}

/* Gallery (image strips) */
.gallery-grid{display:grid;gap:20px;grid-template-columns:repeat(auto-fit,minmax(220px,1fr))}
.gallery-item{position:relative;border-radius:var(--radius);overflow:hidden;aspect-ratio:4/3;box-shadow:var(--shadow)}
.gallery-item img{width:100%;height:100%;object-fit:cover;transition:transform .5s ease}
.gallery-item:hover img{transform:scale(1.07)}
.gallery-item span{position:absolute;left:0;right:0;bottom:0;padding:14px 16px;background:linear-gradient(0deg,rgba(36,59,48,.82),transparent);color:#fff;font-family:var(--font-head);font-style:italic;font-size:.88rem}

/* Stats */
.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{transition:.25s}
.stat .num{font-family:var(--font-head);font-size:clamp(2rem,4vw,2.8rem);color:var(--forest);font-weight:700;display:block;margin-bottom:6px;transition:color .25s}
.stat .label{color:var(--grey);font-size:.85rem}
.stat:hover .num{color:var(--terracotta-dark)}

/* Testimonials */
.testimonials{background:var(--forest);color:#fff}
.testimonials h2,.testimonials .eyebrow{color:#fff}
.testimonials .eyebrow{color:#e3b696}
.testi-grid{display:grid;gap:22px;grid-template-columns:repeat(auto-fit,minmax(260px,1fr))}
.testi{background:rgba(255,255,255,.06);border-radius:var(--radius);padding:26px;transition:.25s;border:1px solid transparent}
.testi:hover{background:rgba(255,255,255,.1);transform:translateY(-4px);border-color:rgba(227,182,150,.4)}
.testi .stars{color:#e3b696;margin-bottom:10px}
.testi blockquote{margin:0 0 14px;font-size:.95rem;color:#fff}
.testi cite{font-style:normal;font-family:var(--font-head);font-style:italic;color:#e3b696;font-size:.88rem}

/* FAQ */
.faq{max-width:760px;margin:0 auto}
.faq details{border-bottom:1px solid var(--line);padding:18px 0}
.faq summary{cursor:pointer;font-family:var(--font-head);font-weight:600;color:var(--forest);font-size:1.05rem;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(--terracotta-dark)}
.faq details[open] summary::after{content:"\2212"}
.faq details p{margin:12px 0 0}

/* Contact */
.contact{background:var(--blush)}
.contact-grid{display:grid;gap:40px;grid-template-columns:1fr}
@media (min-width:900px){.contact-grid{grid-template-columns:1fr 1fr}}
.form{background:#fff;border-radius:var(--radius);padding:34px}
.field{margin-bottom:18px}
.field label{display:block;font-size:.85rem;font-weight:600;color:var(--forest);margin-bottom:6px}
.field input,.field textarea,.field select{width:100%;padding:12px 14px;border:1px solid var(--line);border-radius:var(--radius-sm);font:inherit;color:var(--ink)}
.field textarea{min-height:100px;resize:vertical}
.form-success{display:none;background:var(--cream);color:var(--forest);padding:14px;border-radius:var(--radius-sm);margin-bottom:16px;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:12px 0;border-bottom:1px solid rgba(36,59,48,.12);display:flex;justify-content:space-between;gap:16px;font-size:.95rem}
.contact-info li strong{font-family:var(--font-head);color:var(--forest)}

/* Location card + social */
.location-card{position:relative;border-radius:var(--radius);overflow:hidden;aspect-ratio:4/3;box-shadow:var(--shadow);margin-bottom:26px}
.location-card img{width:100%;height:100%;object-fit:cover;transition:transform .5s ease}
.location-card:hover img{transform:scale(1.06)}
.location-card-overlay{position:absolute;left:0;right:0;bottom:0;padding:18px 20px;background:linear-gradient(0deg,rgba(36,59,48,.88) 10%,transparent);color:#fff}
.location-card-overlay strong{display:block;font-family:var(--font-head);font-size:1.05rem}
.location-card-overlay span{font-size:.82rem;color:#dbe4dd}
.social-row{display:flex;align-items:center;gap:16px;flex-wrap:wrap}
.social-label{font-size:.82rem;font-weight:700;color:var(--forest);text-transform:uppercase;letter-spacing:.06em}
.social-icons{display:flex;gap:10px}
.social-icon{width:40px;height:40px;border-radius:50%;background:var(--blush);color:var(--forest);display:grid;place-items:center;transition:.22s}
.social-icon:hover{background:var(--terracotta);color:#fff;transform:translateY(-3px)}
.social-icon svg{width:18px;height:18px;fill:none;stroke:currentColor;stroke-width:1.8;stroke-linecap:round;stroke-linejoin:round}

/* CTA banner */
.cta-banner{background:var(--forest);color:#fff;border-radius:var(--radius);padding:56px 40px;text-align:center}
.cta-banner h2{color:#fff}
.cta-banner p{color:#d9e2dc;max-width:520px;margin:0 auto 24px}

/* Footer */
.footer{background:var(--ink);color:#cfc7ba;padding:60px 0 24px;font-size:.9rem}
.footer a{color:#cfc7ba}
.footer a:hover{color:#fff}
.footer-grid{display:grid;gap:36px;grid-template-columns:1.4fr repeat(3,1fr);margin-bottom:44px}
@media (max-width:760px){.footer-grid{grid-template-columns:1fr 1fr;gap:28px}.footer-grid > :first-child{grid-column:1/-1}}
.footer h4{color:#fff;font-size:.82rem;text-transform:uppercase;letter-spacing:.08em;margin-bottom:14px}
.footer ul{list-style:none;padding:0;margin:0;display:grid;gap:8px}
.footer-bottom{border-top:1px solid rgba(255,255,255,.08);padding-top:22px;display:flex;justify-content:space-between;flex-wrap:wrap;gap:12px;color:#a89e8d;font-size:.82rem}
.footer-credit a{color:var(--terracotta)}

/* Reveal */
.reveal{opacity:0;transform:translateY(22px);transition:opacity .6s ease,transform .6s ease}
.reveal.in{opacity:1;transform:none}

/* ============================================================
   AI CHATBOT WIDGET (Premium tier differentiator)
   ============================================================ */
.chat-toggle{position:fixed;bottom:26px;right:26px;z-index:80;width:62px;height:62px;border-radius:50%;background:var(--forest);color:#fff;border:none;display:grid;place-items:center;box-shadow:0 12px 28px -8px rgba(36,59,48,.55);cursor:pointer;transition:.2s ease}
.chat-toggle:hover{background:var(--forest-light);transform:translateY(-2px) scale(1.04)}
.chat-toggle svg{width:26px;height:26px;fill:none;stroke:currentColor;stroke-width:2;stroke-linecap:round;stroke-linejoin:round}
.chat-toggle-status{position:absolute;top:4px;right:4px;width:14px;height:14px;border-radius:50%;background:#8fd6ac;border:2.5px solid var(--forest);box-shadow:0 0 0 3px rgba(143,214,172,.3)}

.chat-panel{position:fixed;bottom:26px;right:26px;z-index:90;width:min(420px,calc(100vw - 32px));height:min(680px,calc(100vh - 90px));background:#fff;border-radius:20px;box-shadow:0 24px 60px -12px rgba(36,59,48,.5);display:flex;flex-direction:column;overflow:hidden;transform:translateY(16px) scale(.97);opacity:0;pointer-events:none;transition:width .25s ease,height .25s ease,border-radius .25s ease,transform .22s ease,opacity .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)}
.chat-header{background:var(--forest);color:#fff;padding:18px 20px;display:flex;justify-content:space-between;align-items:center;flex-shrink:0}
.chat-header strong{display:block;font-family:var(--font-head)}
.chat-header span{font-size:.75rem;color:#c8d6cd}
.chat-header-actions{display:flex;gap:8px;flex-shrink:0}
.chat-header-actions button{background:rgba(255,255,255,.15);border:none;color:#fff;width:30px;height:30px;border-radius:50%;cursor:pointer;font-size:1rem;display:grid;place-items:center;transition:.2s}
.chat-header-actions button:hover{background:rgba(255,255,255,.3)}
.chat-header-actions svg{width:16px;height:16px;fill:none;stroke:currentColor;stroke-width:2;stroke-linecap:round;stroke-linejoin:round}
.chat-messages{flex:1;overflow-y:auto;padding:18px 16px;display:flex;flex-direction:column;gap:12px;background:var(--cream)}
.msg{max-width:82%;padding:10px 14px;border-radius:14px;font-size:.88rem;line-height:1.5}
.msg.bot{background:#fff;border:1px solid var(--line);align-self:flex-start;border-bottom-left-radius:4px}
.msg.user{background:var(--terracotta);color:#fff;align-self:flex-end;border-bottom-right-radius:4px}
.quick-replies{display:flex;flex-wrap:wrap;gap:8px;padding:0 16px 12px;flex-shrink:0;background:var(--cream)}
.quick-replies button{background:#fff;border:1px solid var(--line);border-radius:999px;padding:7px 14px;font-size:.78rem;color:var(--forest);cursor:pointer}
.quick-replies button:hover{border-color:var(--terracotta);color:var(--terracotta-dark)}
.chat-form{display:flex;gap:8px;padding:14px 16px;border-top:1px solid var(--line);flex-shrink:0;background:#fff}
.chat-form input{flex:1;border:1px solid var(--line);border-radius:999px;padding:10px 16px;font:inherit;font-size:.88rem}
.chat-form button{background:var(--terracotta);color:#fff;border:none;border-radius:999px;padding:0 18px;font-weight:600;cursor:pointer;font-size:.85rem}
@media (max-width:600px){
  .chat-panel{width:100vw;height:100vh;bottom:0;right:0;border-radius:0}
  .chat-panel.maximized{width:100vw;height:100vh}
}