/* ==========================================================================
   StayEase — Hotel Booking & Reservation System
   Production stylesheet | Vanilla CSS3, mobile-first
   ========================================================================== */

/* ---------- 1. Design Tokens ---------- */
:root{
  --color-primary:#0F6B67;
  --color-primary-dark:#0A4E4B;
  --color-primary-light:#E4F3F1;
  --color-accent:#E8734A;
  --color-accent-dark:#C85A34;
  --color-sand:#F6F1E7;

  --color-bg:#FBF9F4;
  --color-surface:#FFFFFF;
  --color-surface-hover:#F4F1E9;
  --color-border:#E4DFD2;

  --color-text:#22201B;
  --color-text-secondary:#5B564C;
  --color-text-muted:#8C8676;
  --color-text-inverse:#FFFFFF;

  --color-success:#1E7B4D; --color-success-bg:#E5F4EC;
  --color-warning:#B8791A; --color-warning-bg:#FBF0DD;
  --color-danger:#C43D3D;  --color-danger-bg:#FBEAEA;

  --font-display:'Fraunces', Georgia, serif;
  --font-body:'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;

  --fs-xs:.75rem; --fs-sm:.875rem; --fs-base:1rem; --fs-lg:1.125rem;
  --fs-xl:1.35rem; --fs-2xl:1.75rem; --fs-3xl:2.25rem; --fs-4xl:3rem; --fs-5xl:3.75rem;

  --space-xs:.25rem; --space-sm:.5rem; --space-md:1rem; --space-lg:1.5rem;
  --space-xl:2rem; --space-2xl:3rem; --space-3xl:4.5rem;

  --radius-sm:6px; --radius-md:10px; --radius-lg:16px; --radius-xl:24px; --radius-full:999px;

  --shadow-sm:0 1px 3px rgba(20,20,10,.06);
  --shadow-md:0 6px 16px rgba(20,20,10,.08);
  --shadow-lg:0 16px 40px rgba(20,20,10,.12);

  --transition:200ms ease;
  --container-max:1240px;
  --navbar-height:76px;
}

[data-theme="dark"]{
  --color-bg:#14181A;
  --color-surface:#1D2224;
  --color-surface-hover:#252B2D;
  --color-border:#30373A;
  --color-text:#F2F1EC;
  --color-text-secondary:#B9B6AC;
  --color-text-muted:#8B8880;
  --color-primary-light:#16302E;
  --color-sand:#1B2320;
}

/* ---------- 2. Reset ---------- */
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{
  font-family:var(--font-body);
  background:var(--color-bg);
  color:var(--color-text);
  line-height:1.6;
  -webkit-font-smoothing:antialiased;
  transition:background var(--transition),color var(--transition);
  overflow-x:hidden;
}
img{max-width:100%;display:block}
a{color:inherit;text-decoration:none}
ul{list-style:none}
button{font:inherit;cursor:pointer;border:none;background:none;color:inherit}
input,select,textarea{font:inherit;color:inherit}
h1,h2,h3,h4{font-family:var(--font-display);line-height:1.15;font-weight:600}
:focus-visible{outline:3px solid var(--color-accent);outline-offset:2px}
.container{max-width:var(--container-max);margin:0 auto;padding:0 var(--space-lg)}
.sr-only{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap}
.skip-link{position:absolute;top:-50px;left:0;background:var(--color-accent);color:#fff;padding:.6rem 1rem;z-index:2000;transition:top .2s}
.skip-link:focus{top:0}

/* ---------- 3. Utility ---------- */
.text-accent{color:var(--color-accent)}
.section{padding:var(--space-3xl) 0}
.section-head{text-align:center;max-width:640px;margin:0 auto var(--space-2xl)}
.section-head .eyebrow{color:var(--color-accent);font-weight:600;letter-spacing:.08em;text-transform:uppercase;font-size:var(--fs-xs)}
.section-head h2{font-size:var(--fs-3xl);margin-top:var(--space-sm)}
.section-head p{color:var(--color-text-secondary);margin-top:var(--space-sm)}
.grid-2{display:grid;grid-template-columns:repeat(2,1fr);gap:var(--space-xl)}
.grid-3{display:grid;grid-template-columns:repeat(3,1fr);gap:var(--space-xl)}
.grid-4{display:grid;grid-template-columns:repeat(4,1fr);gap:var(--space-lg)}

/* Buttons */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:.5rem;padding:.75rem 1.5rem;border-radius:var(--radius-full);font-weight:600;font-size:var(--fs-sm);transition:all var(--transition);white-space:nowrap}
.btn-primary{background:var(--color-accent);color:#fff}
.btn-primary:hover{background:var(--color-accent-dark);transform:translateY(-1px)}
.btn-outline{background:transparent;border:1.5px solid var(--color-border);color:var(--color-text)}
.btn-outline:hover{border-color:var(--color-accent);color:var(--color-accent)}
.btn-primary-dark{background:var(--color-primary);color:#fff}
.btn-primary-dark:hover{background:var(--color-primary-dark)}
.btn-sm{padding:.5rem 1rem;font-size:var(--fs-xs)}
.btn-lg{padding:1rem 2rem;font-size:var(--fs-base)}
.btn-block{width:100%}
.btn-danger{background:var(--color-danger);color:#fff}
.btn[disabled]{opacity:.5;cursor:not-allowed}

/* Card */
.card{background:var(--color-surface);border:1px solid var(--color-border);border-radius:var(--radius-lg);overflow:hidden;transition:box-shadow var(--transition),transform var(--transition)}
.card:hover{box-shadow:var(--shadow-md);transform:translateY(-3px)}

/* ---------- 4. Header / Navbar ---------- */
.site-header{position:sticky;top:0;z-index:1000;background:var(--color-surface);border-bottom:1px solid var(--color-border);height:var(--navbar-height)}
.navbar-container{display:flex;align-items:center;justify-content:space-between;height:var(--navbar-height)}
.navbar-logo{display:flex;align-items:center;gap:.5rem;font-family:var(--font-display);font-size:var(--fs-xl);font-weight:700}
.navbar-logo i{color:var(--color-accent)}
.navbar-menu{display:flex;gap:var(--space-xl);align-items:center}
.navbar-menu a{font-weight:500;font-size:var(--fs-sm);color:var(--color-text-secondary);transition:color var(--transition);position:relative;padding:.25rem 0}
.navbar-menu a:hover,.navbar-menu a.active{color:var(--color-primary)}
.navbar-menu a.active::after{content:'';position:absolute;bottom:-6px;left:0;right:0;height:2px;background:var(--color-accent);border-radius:2px}
.navbar-right{display:flex;align-items:center;gap:var(--space-md)}
.navbar-auth{display:flex;gap:.75rem}
.navbar-toggle{display:none;flex-direction:column;gap:5px;width:26px}
.hamburger-line{height:2px;background:var(--color-text);border-radius:2px;transition:all var(--transition)}
.theme-toggle{width:40px;height:40px;border-radius:50%;display:flex;align-items:center;justify-content:center;background:var(--color-surface-hover);border:1px solid var(--color-border)}
.theme-toggle:hover{border-color:var(--color-accent)}
.theme-toggle .fa-sun{display:none}
[data-theme="dark"] .theme-toggle .fa-moon{display:none}
[data-theme="dark"] .theme-toggle .fa-sun{display:block}

/* Scroll progress */
.scroll-progress{position:fixed;top:0;left:0;height:3px;background:var(--color-accent);z-index:2000;width:0%}

/* Back to top */
.back-to-top{position:fixed;bottom:24px;right:24px;width:48px;height:48px;border-radius:50%;background:var(--color-primary);color:#fff;display:flex;align-items:center;justify-content:center;box-shadow:var(--shadow-md);opacity:0;visibility:hidden;transform:translateY(10px);transition:all var(--transition);z-index:900}
.back-to-top.visible{opacity:1;visibility:visible;transform:translateY(0)}
.back-to-top:hover{background:var(--color-primary-dark)}

/* ---------- 5. Hero ---------- */
.hero-section{position:relative;min-height:78vh;display:flex;align-items:center;color:#fff;background:linear-gradient(180deg,rgba(15,25,20,.55),rgba(15,25,20,.75)),url('https://images.unsplash.com/photo-1566073771259-6a8506099945?q=80&w=1600&auto=format&fit=crop') center/cover fixed}
.hero-content{position:relative;z-index:2;max-width:720px}
.hero-content .eyebrow{color:var(--color-accent);font-weight:700;letter-spacing:.1em;text-transform:uppercase;font-size:var(--fs-sm)}
.hero-title{font-size:var(--fs-5xl);margin:var(--space-md) 0;color:#fff}
.hero-subtitle{font-size:var(--fs-lg);color:#f1efe9;margin-bottom:var(--space-xl);max-width:560px}

/* Search form */
.search-section{margin-top:-56px;position:relative;z-index:10}
.search-form{background:var(--color-surface);border-radius:var(--radius-lg);box-shadow:var(--shadow-lg);padding:var(--space-lg);display:grid;grid-template-columns:repeat(4,1fr) auto;gap:var(--space-md);align-items:end}
.form-group{display:flex;flex-direction:column;gap:.4rem}
.form-group label{font-size:var(--fs-xs);font-weight:600;color:var(--color-text-secondary)}
.form-group input,.form-group select{padding:.7rem .9rem;border:1.5px solid var(--color-border);border-radius:var(--radius-md);background:var(--color-bg)}
.form-group input:focus,.form-group select:focus{border-color:var(--color-primary)}
.search-btn{height:46px}

/* ---------- 6. Hotel/Room cards ---------- */
.room-card-image{position:relative;aspect-ratio:4/3;overflow:hidden}
.room-card-image img{width:100%;height:100%;object-fit:cover;transition:transform .4s}
.card:hover .room-card-image img{transform:scale(1.06)}
.room-card-badge{position:absolute;top:12px;left:12px;background:var(--color-accent);color:#fff;padding:.25rem .7rem;border-radius:var(--radius-full);font-size:var(--fs-xs);font-weight:600}
.room-card-fav{position:absolute;top:12px;right:12px;width:36px;height:36px;border-radius:50%;background:rgba(255,255,255,.9);display:flex;align-items:center;justify-content:center}
.room-card-fav.active i{color:var(--color-accent)}
.room-card-fav.active{color:var(--color-accent)}
.room-card-body{padding:var(--space-lg)}
.room-card-location{color:var(--color-text-muted);font-size:var(--fs-sm);display:flex;gap:.4rem;align-items:center;margin-bottom:.25rem}
.room-card-title{font-size:var(--fs-lg);margin-bottom:.4rem}
.room-card-rating{display:flex;align-items:center;gap:.35rem;font-size:var(--fs-sm);margin-bottom:.6rem}
.room-card-rating .stars{color:#E8A93B}
.room-card-amenities{display:flex;gap:.6rem;margin-bottom:.9rem;color:var(--color-text-muted);font-size:var(--fs-sm)}
.room-card-footer{display:flex;align-items:center;justify-content:space-between;border-top:1px solid var(--color-border);padding-top:.9rem}
.room-card-price{font-size:var(--fs-xl);font-weight:700;color:var(--color-primary)}
.room-card-price span{font-size:var(--fs-xs);font-weight:400;color:var(--color-text-muted)}

/* Filters sidebar */
.results-layout{display:grid;grid-template-columns:280px 1fr;gap:var(--space-xl);align-items:start}
.filters-panel{background:var(--color-surface);border:1px solid var(--color-border);border-radius:var(--radius-lg);padding:var(--space-lg);position:sticky;top:calc(var(--navbar-height) + 16px)}
.filter-group{margin-bottom:var(--space-lg);padding-bottom:var(--space-lg);border-bottom:1px solid var(--color-border)}
.filter-group:last-child{border-bottom:none}
.filter-group h4{font-size:var(--fs-sm);margin-bottom:.8rem;text-transform:uppercase;letter-spacing:.04em;color:var(--color-text-secondary)}
.filter-checkbox{display:flex;align-items:center;gap:.5rem;margin-bottom:.55rem;font-size:var(--fs-sm)}
.range-value{font-size:var(--fs-sm);color:var(--color-text-secondary);margin-top:.4rem}
.results-toolbar{display:flex;justify-content:space-between;align-items:center;margin-bottom:var(--space-lg);flex-wrap:wrap;gap:var(--space-md)}
.results-count{color:var(--color-text-secondary);font-size:var(--fs-sm)}
.sort-select{padding:.55rem .9rem;border:1.5px solid var(--color-border);border-radius:var(--radius-md);background:var(--color-surface)}

/* Loading spinner */
.spinner-overlay{display:flex;align-items:center;justify-content:center;padding:var(--space-3xl) 0;grid-column:1/-1}
.spinner{width:44px;height:44px;border:4px solid var(--color-border);border-top-color:var(--color-accent);border-radius:50%;animation:spin .8s linear infinite}
@keyframes spin{to{transform:rotate(360deg)}}
.empty-state{grid-column:1/-1;text-align:center;padding:var(--space-3xl) var(--space-lg);color:var(--color-text-secondary)}
.empty-state i{font-size:2.5rem;color:var(--color-border);margin-bottom:var(--space-md)}

/* ---------- 7. Hotel details ---------- */
.gallery{display:grid;grid-template-columns:2fr 1fr 1fr;grid-template-rows:1fr 1fr;gap:8px;border-radius:var(--radius-lg);overflow:hidden;height:420px}
.gallery img{width:100%;height:100%;object-fit:cover;cursor:pointer;transition:opacity .2s}
.gallery img:hover{opacity:.85}
.gallery-main{grid-row:1/3}
.lightbox{position:fixed;inset:0;background:rgba(10,10,10,.92);z-index:3000;display:none;align-items:center;justify-content:center}
.lightbox.active{display:flex}
.lightbox img{max-width:88vw;max-height:82vh;border-radius:var(--radius-md)}
.lightbox-close{position:absolute;top:24px;right:32px;color:#fff;font-size:2rem}
.lightbox-nav{position:absolute;top:50%;transform:translateY(-50%);color:#fff;font-size:2rem;padding:1rem}
.lightbox-prev{left:16px}.lightbox-next{right:16px}

.details-layout{display:grid;grid-template-columns:1fr 380px;gap:var(--space-2xl);align-items:start;margin-top:var(--space-2xl)}
.details-header{display:flex;justify-content:space-between;align-items:flex-start;margin-bottom:var(--space-md);flex-wrap:wrap;gap:1rem}
.amenity-pill{display:inline-flex;align-items:center;gap:.5rem;background:var(--color-primary-light);color:var(--color-primary);padding:.5rem 1rem;border-radius:var(--radius-full);font-size:var(--fs-sm);margin:0 .5rem .5rem 0}
.booking-card{background:var(--color-surface);border:1px solid var(--color-border);border-radius:var(--radius-lg);padding:var(--space-lg);position:sticky;top:calc(var(--navbar-height) + 16px);box-shadow:var(--shadow-md)}
.booking-price-row{display:flex;justify-content:space-between;padding:.5rem 0;font-size:var(--fs-sm);color:var(--color-text-secondary)}
.booking-total-row{display:flex;justify-content:space-between;padding-top:.9rem;margin-top:.5rem;border-top:1px solid var(--color-border);font-weight:700;font-size:var(--fs-lg)}
.map-frame{width:100%;height:320px;border:0;border-radius:var(--radius-lg)}

/* Reviews */
.review-card{padding:var(--space-lg) 0;border-bottom:1px solid var(--color-border)}
.review-header{display:flex;align-items:center;gap:.75rem;margin-bottom:.5rem}
.review-avatar{width:42px;height:42px;border-radius:50%;background:var(--color-primary);color:#fff;display:flex;align-items:center;justify-content:center;font-weight:700}

/* Accordion (FAQ) */
.accordion-item{border:1px solid var(--color-border);border-radius:var(--radius-md);margin-bottom:.75rem;overflow:hidden}
.accordion-header{display:flex;justify-content:space-between;align-items:center;padding:1rem 1.25rem;background:var(--color-surface);font-weight:600}
.accordion-header i{transition:transform var(--transition)}
.accordion-item.open .accordion-header i{transform:rotate(180deg)}
.accordion-body{max-height:0;overflow:hidden;transition:max-height .3s ease;background:var(--color-surface)}
.accordion-body p{padding:0 1.25rem 1.25rem;color:var(--color-text-secondary)}

/* Tabs (bookings) */
.tabs{display:flex;gap:1.5rem;border-bottom:1px solid var(--color-border);margin-bottom:var(--space-xl)}
.tab-btn{padding:.85rem 0;font-weight:600;color:var(--color-text-muted);border-bottom:2px solid transparent}
.tab-btn.active{color:var(--color-primary);border-color:var(--color-accent)}
.booking-row{display:grid;grid-template-columns:120px 1fr auto;gap:var(--space-lg);align-items:center;padding:var(--space-lg);background:var(--color-surface);border:1px solid var(--color-border);border-radius:var(--radius-md);margin-bottom:var(--space-md)}
.booking-row img{width:120px;height:90px;object-fit:cover;border-radius:var(--radius-sm)}
.status-badge{padding:.25rem .75rem;border-radius:var(--radius-full);font-size:var(--fs-xs);font-weight:700;text-transform:uppercase}
.status-confirmed{background:var(--color-success-bg);color:var(--color-success)}
.status-pending{background:var(--color-warning-bg);color:var(--color-warning)}
.status-cancelled{background:var(--color-danger-bg);color:var(--color-danger)}
.stats-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:var(--space-md);margin-bottom:var(--space-2xl)}
.stat-box{background:var(--color-surface);border:1px solid var(--color-border);border-radius:var(--radius-md);padding:var(--space-lg);text-align:center}
.stat-box .num{font-size:var(--fs-3xl);font-weight:700;color:var(--color-primary);font-family:var(--font-display)}
.stat-box .label{color:var(--color-text-secondary);font-size:var(--fs-sm)}
.chart-card{background:var(--color-surface);border:1px solid var(--color-border);border-radius:var(--radius-lg);padding:var(--space-lg);margin-bottom:var(--space-2xl)}

/* Forms (auth/contact/booking) */
.auth-wrap{max-width:460px;margin:var(--space-3xl) auto;background:var(--color-surface);border:1px solid var(--color-border);border-radius:var(--radius-lg);padding:var(--space-2xl);box-shadow:var(--shadow-md)}
.field{margin-bottom:var(--space-lg)}
.field label{display:block;font-size:var(--fs-sm);font-weight:600;margin-bottom:.4rem}
.field input,.field select,.field textarea{width:100%;padding:.75rem 1rem;border:1.5px solid var(--color-border);border-radius:var(--radius-md);background:var(--color-bg)}
.field input:focus,.field select:focus,.field textarea:focus{border-color:var(--color-primary)}
.field-error{color:var(--color-danger);font-size:var(--fs-xs);margin-top:.35rem;display:none}
.field.invalid input,.field.invalid select,.field.invalid textarea{border-color:var(--color-danger)}
.field.invalid .field-error{display:block}
.field.valid input{border-color:var(--color-success)}
.form-row{display:grid;grid-template-columns:1fr 1fr;gap:var(--space-md)}

/* Toasts */
.toast-container{position:fixed;bottom:24px;left:24px;z-index:3000;display:flex;flex-direction:column;gap:.6rem}
.toast{background:var(--color-surface);border-left:4px solid var(--color-primary);border-radius:var(--radius-md);padding:.9rem 1.2rem;box-shadow:var(--shadow-lg);min-width:280px;display:flex;align-items:center;gap:.7rem;animation:toastIn .25s ease}
.toast.success{border-color:var(--color-success)}
.toast.error{border-color:var(--color-danger)}
.toast.warning{border-color:var(--color-warning)}
@keyframes toastIn{from{opacity:0;transform:translateY(12px)}to{opacity:1;transform:translateY(0)}}

/* Footer */
.site-footer{background:var(--color-primary-dark);color:#EDEAE1;padding:var(--space-3xl) 0 var(--space-lg)}
.footer-grid{display:grid;grid-template-columns:2fr 1fr 1fr 1.3fr;gap:var(--space-2xl);margin-bottom:var(--space-2xl)}
.footer-logo{font-family:var(--font-display);font-size:var(--fs-xl);color:#fff;margin-bottom:.75rem}
.footer-col h4{color:#fff;margin-bottom:1rem;font-size:var(--fs-sm);text-transform:uppercase;letter-spacing:.06em}
.footer-col a,.footer-col li{color:#C9C5B8;font-size:var(--fs-sm);margin-bottom:.6rem;display:block}
.footer-col a:hover{color:var(--color-accent)}
.footer-bottom{border-top:1px solid rgba(255,255,255,.12);padding-top:var(--space-lg);display:flex;justify-content:space-between;font-size:var(--fs-xs);color:#A9A596;flex-wrap:wrap;gap:.5rem}
.social-icons{display:flex;gap:.75rem}
.social-icons a{width:36px;height:36px;border-radius:50%;background:rgba(255,255,255,.08);display:flex;align-items:center;justify-content:center}
.social-icons a:hover{background:var(--color-accent)}

/* Page banner (about/contact/rooms header) */
.page-banner{background:var(--color-primary);color:#fff;padding:var(--space-2xl) 0;text-align:center}
.page-banner h1{font-size:var(--fs-3xl);color:#fff}
.breadcrumb{font-size:var(--fs-sm);color:#D8ECE9;margin-top:.5rem}
.breadcrumb a{color:#fff;font-weight:600}

/* Contact page */
.contact-info-item{display:flex;gap:1rem;margin-bottom:var(--space-lg)}
.contact-info-item i{width:44px;height:44px;background:var(--color-primary-light);color:var(--color-primary);border-radius:50%;display:flex;align-items:center;justify-content:center;flex-shrink:0}

/* About / team / values */
.value-card{text-align:center;padding:var(--space-xl)}
.value-card i{font-size:2rem;color:var(--color-accent);margin-bottom:1rem}
.team-card{text-align:center}
.team-card img{width:100%;aspect-ratio:1;object-fit:cover;border-radius:var(--radius-lg);margin-bottom:1rem}

/* Skeleton loader */
.skeleton{background:linear-gradient(90deg,var(--color-border) 25%,var(--color-surface-hover) 37%,var(--color-border) 63%);background-size:400% 100%;animation:skeleton 1.4s ease infinite}
@keyframes skeleton{0%{background-position:100% 50%}100%{background-position:0 50%}}

/* ---------- 8. Responsive ---------- */
@media (max-width:1024px){
  .grid-4{grid-template-columns:repeat(2,1fr)}
  .grid-3{grid-template-columns:repeat(2,1fr)}
  .details-layout{grid-template-columns:1fr}
  .results-layout{grid-template-columns:1fr}
  .filters-panel{position:static}
  .footer-grid{grid-template-columns:1fr 1fr}
  .search-form{grid-template-columns:1fr 1fr}
}
@media (max-width:768px){
  .navbar-menu,.navbar-auth{position:absolute;top:var(--navbar-height);left:0;right:0;background:var(--color-surface);flex-direction:column;padding:var(--space-lg);border-top:1px solid var(--color-border);display:none;box-shadow:var(--shadow-md)}
  .navbar-menu.active,.navbar-auth.active{display:flex}
  .navbar-toggle{display:flex}
  .grid-2,.grid-3,.grid-4{grid-template-columns:1fr}
  .hero-title{font-size:var(--fs-3xl)}
  .hero-section{background-attachment:scroll}
  .search-form{grid-template-columns:1fr}
  .gallery{grid-template-columns:1fr;grid-template-rows:auto;height:auto}
  .gallery-main{grid-row:auto;height:220px}
  .gallery img:not(.gallery-main){height:110px}
  .stats-grid{grid-template-columns:1fr 1fr}
  .footer-grid{grid-template-columns:1fr}
  .form-row{grid-template-columns:1fr}
  .booking-row{grid-template-columns:1fr;text-align:center}
  .booking-row img{width:100%;height:160px}
  .toast-container,.toast{left:16px;right:16px;min-width:auto}
}