/* fedus-style.css
   Modern responsive CSS for an electronics e-commerce site (FEDUS)
   Save as fedus-style.css and include in your HTML.
   Customize :root variables to change brand colors / fonts quickly.
*/

/* -------------------------
   VARIABLES & BASE SETUP
   ------------------------- */
:root{
  --brand-primary: #0a4b8c; /* FEDUS blue — change as needed */
  --brand-accent: #ff6b00;  /* accent / CTA */
  --muted: #6b7280;
  --bg: #ffffff;
  --surface: #f8fafc;
  --card: #ffffff;
  --text: #0f172a;
  --radius-sm: 6px;
  --radius-md: 12px;
  --shadow-sm: 0 1px 3px rgba(15,23,42,0.06);
  --shadow-md: 0 6px 18px rgba(15,23,42,0.08);
  --container-width: 1200px;
  --max-width-narrow: 980px;
  --transition-fast: 180ms;
  --transition-medium: 300ms;
  --font-sans: "Inter", system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial;
  --focus-ring: 3px solid rgba(10,75,140,0.14);
  --sale-red: #dc2626;
}

/* Dark mode optional */
[data-theme="dark"]{
  --bg: #0b1220;
  --surface: #081021;
  --card: #071022;
  --text: #e6eef8;
  --muted: #9aa6bf;
  --shadow-sm: none;
  --shadow-md: none;
}

/* Reset & base */
*{box-sizing: border-box}
html,body{height:100%}
body{
  margin:0;
  font-family:var(--font-sans);
  background:var(--bg);
  color:var(--text);
  -webkit-font-smoothing:antialiased;
  -moz-osx-font-smoothing:grayscale;
  line-height:1.45;
  font-size:16px;
}

/* Container */
.container{
  width:100%;
  max-width:var(--container-width);
  margin:0 auto;
  padding:0 20px;
}

/* Utility helpers */
.hidden{display:none!important}
.text-center{text-align:center}
.flex{display:flex}
.items-center{align-items:center}
.justify-between{justify-content:space-between}
.column{flex-direction:column}
.row{flex-direction:row}
.mr-8{margin-right:8px}
.mt-8{margin-top:8px}
.mb-16{margin-bottom:16px}

/* -------------------------
   TYPOGRAPHY
   ------------------------- */
.h1{font-size:clamp(1.6rem, 2.8vw, 2.4rem); font-weight:700; margin:0 0 .6rem}
.h2{font-size:1.25rem; font-weight:700; margin:0 0 .5rem}
.lead{font-size:1rem; color:var(--muted)}
.small{font-size:.9rem; color:var(--muted)}

a{color:var(--brand-primary); text-decoration:none}
a:hover{text-decoration:underline}

/* -------------------------
   SITE HEADER / NAVBAR
   ------------------------- */
.site-header{
  background:linear-gradient(180deg, rgba(255,255,255,0.6), transparent);
  position:sticky;
  top:0;
  z-index:100;
  backdrop-filter: blur(6px);
  border-bottom:1px solid rgba(15,23,42,0.04);
}
.site-header .header-inner{
  display:flex;
  align-items:center;
  justify-content:space-between;
  padding:12px 20px;
  max-width:var(--container-width);
  margin:0 auto;
}
.brand{
  display:flex;
  align-items:center;
  gap:12px;
}
.brand-logo{
  width:44px;
  height:44px;
  border-radius:8px;
  background:linear-gradient(135deg,var(--brand-primary),#0d6fb3);
  display:inline-flex;
  align-items:center;
  justify-content:center;
  color:white;
  font-weight:700;
  box-shadow:var(--shadow-sm);
}
.brand-name{font-weight:700; letter-spacing:.2px}

/* Search */
.header-search{
  flex:1;
  max-width:560px;
  margin:0 18px;
  display:flex;
  gap:8px;
}
.header-search input[type="search"]{
  width:100%;
  padding:10px 14px;
  border-radius:10px;
  border:1px solid rgba(15,23,42,0.08);
  background:var(--card);
  transition:box-shadow var(--transition-fast);
}
.header-search input[type="search"]:focus{
  outline:none;
  box-shadow:var(--focus-ring);
  border-color:var(--brand-primary);
}

/* Header actions */
.header-actions{display:flex; gap:8px; align-items:center}
.icon-btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  padding:8px 10px;
  border-radius:8px;
  background:transparent;
  border:1px solid rgba(15,23,42,0.05);
  transition:all var(--transition-fast);
}
.icon-btn:hover{transform:translateY(-2px); box-shadow:var(--shadow-sm)}
.cart-badge{
  background:var(--brand-accent);
  color:white;
  font-weight:600;
  padding:3px 7px;
  border-radius:999px;
  font-size:.8rem;
  margin-left:6px;
}

/* Main navigation */
.main-nav{display:flex; gap:12px; align-items:center; padding:8px 0}
.main-nav a{padding:8px 10px; border-radius:8px; color:var(--muted); font-weight:600}
.main-nav a:hover{background:rgba(10,75,140,0.06); color:var(--brand-primary)}

/* -------------------------
   HERO / BANNER
   ------------------------- */
.hero{
  display:grid;
  grid-template-columns: 1fr 480px;
  gap:24px;
  align-items:center;
  padding:28px 0;
}
.hero .hero-card{
  background:linear-gradient(180deg,var(--surface),transparent);
  padding:24px;
  border-radius:var(--radius-md);
  box-shadow:var(--shadow-md);
}
.hero .cta{
  display:inline-flex;
  align-items:center;
  gap:10px;
  background:var(--brand-primary);
  color:white;
  padding:12px 16px;
  border-radius:10px;
  font-weight:700;
  border:none;
  cursor:pointer;
  transition:transform var(--transition-fast);
}
.hero .cta:hover{transform:translateY(-3px)}

/* -------------------------
   LAYOUT: SIDEBAR + PRODUCT GRID
   ------------------------- */
.shop-layout{
  display:grid;
  grid-template-columns: 260px 1fr;
  gap:20px;
  margin-top:20px;
}

/* Sidebar filters */
.sidebar{
  background:var(--card);
  padding:16px;
  border-radius:12px;
  border:1px solid rgba(15,23,42,0.04);
  position:sticky;
  top:88px;
  height:fit-content;
}
.filter-group{margin-bottom:16px}
.filter-group h4{margin:0 0 8px; font-size:.95rem; color:var(--muted)}
.checkbox-row{display:flex; gap:8px; align-items:center; margin-bottom:8px}
.checkbox-row input[type="checkbox"]{width:16px; height:16px}

/* Product grid */
.product-grid{
  display:grid;
  grid-template-columns: repeat(4, 1fr);
  gap:18px;
  align-items:start;
}
@media (max-width:1100px){
  .product-grid{grid-template-columns: repeat(3, 1fr)}
}
@media (max-width:780px){
  .hero{grid-template-columns:1fr}
  .shop-layout{grid-template-columns:1fr}
  .product-grid{grid-template-columns: repeat(2, 1fr)}
  .header-search{display:none}
}
@media (max-width:480px){
  .product-grid{grid-template-columns:1fr}
}

/* -------------------------
   PRODUCT CARD
   ------------------------- */
.product-card{
  background:var(--card);
  border-radius:12px;
  overflow:hidden;
  border:1px solid rgba(15,23,42,0.04);
  transition:transform var(--transition-fast), box-shadow var(--transition-fast);
  display:flex;
  flex-direction:column;
}
.product-card:hover{transform:translateY(-6px); box-shadow:var(--shadow-md)}
.product-media{
  background:linear-gradient(180deg, rgba(15,23,42,0.03), transparent);
  padding:16px;
  display:flex;
  align-items:center;
  justify-content:center;
  min-height:150px;
}
.product-media img{max-width:100%; max-height:160px; object-fit:contain}
.product-body{padding:12px 14px; display:flex; flex-direction:column; gap:8px; flex:1}
.product-title{font-weight:700; font-size:.98rem}
.product-desc{font-size:.9rem; color:var(--muted); min-height:38px}
.product-meta{display:flex; align-items:center; justify-content:space-between; gap:8px}
.price{font-weight:800; font-size:1rem}
.price .old{font-weight:600; text-decoration:line-through; color:var(--muted); font-size:.9rem; margin-left:8px}
.add-to-cart{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  background:var(--brand-accent);
  color:white;
  border:none;
  padding:10px 12px;
  border-radius:8px;
  cursor:pointer;
  font-weight:700;
  transition:opacity var(--transition-fast), transform var(--transition-fast);
}
.add-to-cart:active{transform:scale(.99)}
.badge{
  display:inline-block;
  padding:6px 8px;
  border-radius:8px;
  background:rgba(10,75,140,0.08);
  color:var(--brand-primary);
  font-weight:700;
  font-size:.75rem;
}

/* -------------------------
   PRODUCT LIST / DETAIL
   ------------------------- */
.product-detail{
  display:grid;
  grid-template-columns: 420px 1fr;
  gap:20px;
  margin-top:18px;
}
.product-gallery{background:var(--card); padding:16px; border-radius:12px}
.product-info h1{margin-top:0}
.specs-table{width:100%; border-collapse:collapse; margin-top:12px}
.specs-table th, .specs-table td{padding:8px; border-bottom:1px solid rgba(15,23,42,0.04); text-align:left}
.specs-table th{color:var(--muted); font-weight:600; width:200px}

/* -------------------------
   FORMS & INPUTS
   ------------------------- */
input[type="text"], input[type="email"], input[type="number"], textarea, select{
  width:100%;
  padding:10px 12px;
  border-radius:10px;
  border:1px solid rgba(15,23,42,0.08);
  background:var(--card);
  transition:box-shadow var(--transition-fast);
  font-size:1rem;
}
input:focus, textarea:focus, select:focus{outline:none; box-shadow:var(--focus-ring)}

/* Buttons */
.btn{
  display:inline-flex;
  align-items:center;
  gap:8px;
  padding:10px 14px;
  border-radius:10px;
  border:none;
  cursor:pointer;
  font-weight:700;
}
.btn-primary{background:var(--brand-primary); color:white}
.btn-outline{background:transparent; border:1px solid rgba(15,23,42,0.08); color:var(--text)}

.form-row{display:grid; grid-template-columns:1fr 1fr; gap:12px}
@media (max-width:600px){ .form-row{grid-template-columns:1fr} }

/* -------------------------
   NOTIFICATIONS / MESSAGES
   ------------------------- */
.alert{
  padding:12px 16px;
  border-radius:10px;
  margin-bottom:12px;
  background:linear-gradient(180deg, rgba(10,75,140,0.04), transparent);
  border:1px solid rgba(10,75,140,0.06);
}

/* -------------------------
   FOOTER
   ------------------------- */
.site-footer{
  margin-top:36px;
  border-top:1px solid rgba(15,23,42,0.04);
  padding:24px 0;
  background:var(--surface);
}
.site-footer .footer-inner{display:flex; gap:20px; justify-content:space-between; align-items:flex-start; max-width:var(--container-width); margin:0 auto; padding:0 20px}
.footer-col{flex:1; min-width:180px}
.footer-col h4{margin-top:0}
.footer-links a{display:block; margin-bottom:8px; color:var(--muted)}

/* -------------------------
   SMALL UI ELEMENTS
   ------------------------- */
.pill{display:inline-block; padding:6px 10px; border-radius:999px; background:rgba(0,0,0,0.04); font-weight:600}
.kicker{font-size:.78rem; color:var(--muted); text-transform:uppercase; letter-spacing:1px}

/* TAG / FILTER BADGE */
.tag{display:inline-flex; gap:8px; align-items:center; padding:6px 10px; border-radius:999px; background:rgba(15,23,42,0.04); color:var(--muted); font-weight:700}

/* -------------------------
   MODAL
   ------------------------- */
.modal-backdrop{
  position:fixed; inset:0; background:rgba(2,6,23,0.56); display:flex; align-items:center; justify-content:center; z-index:200;
}
.modal{
  width:100%;
  max-width:720px;
  background:var(--card);
  border-radius:12px;
  padding:18px;
  box-shadow:var(--shadow-md);
}

/* -------------------------
   LOADING SKELETONS
   ------------------------- */
.skeleton{
  background:linear-gradient(90deg, rgba(0,0,0,0.06), rgba(0,0,0,0.02), rgba(0,0,0,0.06));
  background-size:200% 100%;
  animation: shimmer 1.6s linear infinite;
  border-radius:8px;
}
@keyframes shimmer{0%{background-position:200% 0}100%{background-position:-200% 0}}

/* -------------------------
   TABLES
   ------------------------- */
.table{width:100%; border-collapse:collapse}
.table th, .table td{padding:12px 10px; border-bottom:1px solid rgba(15,23,42,0.04); text-align:left}
.table th{background:transparent; color:var(--muted)}

/* -------------------------
   RESPONSIVE HELPERS
   ------------------------- */
@media (max-width:900px){
  .brand-name{display:none}
  .site-header .header-inner{padding:10px}
}

/* -------------------------
   SMALL STATES
   ------------------------- */
.is-out-of-stock{opacity:.6; pointer-events:none}
.sale-badge{background:var(--sale-red); color:white; padding:4px 8px; border-radius:8px; font-weight:800}

/* -------------------------
   PRINT STYLES
   ------------------------- */
@media print{
  body{background:white; color:black}
  .site-header, .site-footer, .sidebar, .header-search, .header-actions{display:none}
  .container{padding:0}
}

/* -------------------------
   ACCESSIBILITY
   ------------------------- */
a:focus, button:focus, input:focus{outline:none; box-shadow:var(--focus-ring)}
/* End of fedus-style.css */