/* ============================================
   MMIX.SHOP Design System — Premium CSS
   ============================================ */

/* --- TOKENS --- */
:root {
  --color-primary: #1B3A5C;
  --color-primary-dark: #142d47;
  --color-primary-light: #2a5580;
  --color-accent: #27ae60;
  --color-accent-dark: #1e8449;
  --color-warning: #e67e22;
  --color-error: #dc2626;
  --color-success: #15803d;
  --color-surface: #f8fafc;
  --color-surface-2: #f1f5f9;
  --color-border: #e2e8f0;
  --color-text: #1e293b;
  --color-text-secondary: #64748b;
  --color-text-inverse: #ffffff;
  --color-dark: #0f172a;
  --space-xs: 4px; --space-sm: 8px; --space-md: 16px; --space-lg: 24px; --space-xl: 32px; --space-2xl: 48px; --space-3xl: 64px;
  --font: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
  --text-xs: 11px; --text-sm: 13px; --text-base: 15px; --text-lg: 17px; --text-xl: 20px; --text-2xl: 24px; --text-3xl: 32px; --text-4xl: 40px;
  --radius-sm: 6px; --radius-md: 10px; --radius-lg: 14px; --radius-xl: 20px; --radius-full: 9999px;
  --shadow-sm: 0 1px 3px rgba(0,0,0,.06);
  --shadow-md: 0 4px 12px rgba(0,0,0,.08);
  --shadow-lg: 0 8px 24px rgba(0,0,0,.1);
  --shadow-xl: 0 16px 40px rgba(0,0,0,.12);
  --container: 1280px;
  --header-h: 64px;
  --transition: .2s ease;
}

/* --- RESET --- */
*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }
body { margin: 0; font-family: var(--font); font-size: var(--text-base); line-height: 1.6; color: var(--color-text); background: #fff; -webkit-font-smoothing: antialiased; overflow-x: hidden; }
img { max-width: 100%; height: auto; display: block; }
a { color: var(--color-primary); text-decoration: none; transition: color var(--transition); }
a:hover { color: var(--color-primary-light); }
ul, ol { list-style: none; margin: 0; padding: 0; }
h1,h2,h3,h4,h5,h6 { margin: 0 0 var(--space-sm); font-weight: 700; line-height: 1.2; color: var(--color-text); }
h1 { font-size: var(--text-3xl); } h2 { font-size: var(--text-2xl); } h3 { font-size: var(--text-lg); }
button { cursor: pointer; font-family: inherit; }

/* --- LAYOUT --- */
.container { width: 100%; max-width: var(--container); margin: 0 auto; padding: 0 var(--space-md); }
.section { padding: var(--space-2xl) 0; }
.section--surface { background: var(--color-surface); }
.section--primary { background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-dark) 100%); padding: var(--space-3xl) 0; }
.section__title { text-align: center; margin-bottom: var(--space-xs); }
.section__subtitle { text-align: center; color: var(--color-text-secondary); margin-bottom: var(--space-xl); font-size: var(--text-base); }
.main-content { min-height: 60vh; padding-top: calc(var(--header-h) + 36px); }

/* Grids */
.grid-2, .grid-3, .grid-4 { display: grid; gap: var(--space-lg); }
.grid-2 { grid-template-columns: 1fr; }
.grid-3 { grid-template-columns: 1fr; }
.grid-4 { grid-template-columns: 1fr 1fr; }
@media(min-width:640px) { .grid-2 { grid-template-columns: repeat(2,1fr); } .grid-3 { grid-template-columns: repeat(2,1fr); } }
@media(min-width:768px) { .grid-3 { grid-template-columns: repeat(3,1fr); } .grid-4 { grid-template-columns: repeat(2,1fr); } }
@media(min-width:1024px) { .grid-4 { grid-template-columns: repeat(4,1fr); } }

/* --- SANDBOX BANNER --- */
.sandbox-banner { background: #fef3c7; color: #92400e; text-align: center; padding: 6px var(--space-md); font-size: var(--text-xs); font-weight: 600; position: fixed; top: 0; left: 0; right: 0; z-index: 1100; }
.sandbox-banner i { margin-right: 4px; }

/* --- HEADER --- */
.shop-header { position: fixed; top: 28px; left: 0; right: 0; z-index: 1000; background: #fff; box-shadow: var(--shadow-sm); border-bottom: 1px solid var(--color-border); }
.shop-header__container { display: flex; align-items: center; gap: var(--space-md); height: var(--header-h); }
.shop-header__logo { display: flex; align-items: center; gap: var(--space-sm); text-decoration: none; flex-shrink: 0; }
.shop-header__logo-img { width: 40px; height: 40px; display: block; border-radius: var(--radius-md); object-fit: contain; }
.shop-header__logo-text { font-size: var(--text-xl); font-weight: 800; color: var(--color-primary); letter-spacing: -0.5px; }
.shop-header__logo-dot { color: var(--color-accent); }
.shop-header__search { flex: 1; max-width: 480px; margin: 0 auto; display: none; }
.search-form { position: relative; display: flex; align-items: center; }
.search-form__icon { position: absolute; left: 14px; color: var(--color-text-secondary); font-size: var(--text-sm); pointer-events: none; }
.search-form__input { width: 100%; padding: 10px 16px 10px 40px; border: 1px solid var(--color-border); border-radius: var(--radius-full); font-size: var(--text-sm); background: var(--color-surface); transition: border-color var(--transition), box-shadow var(--transition); }
.search-form__input:focus { outline: none; border-color: var(--color-primary); box-shadow: 0 0 0 3px rgba(27,58,92,.1); background: #fff; }
.shop-header__actions { display: flex; align-items: center; gap: var(--space-md); }
.shop-header__cart { position: relative; color: var(--color-text); font-size: 18px; padding: 8px; }
.shop-header__cart-count { position: absolute; top: 2px; right: 0; background: var(--color-accent); color: #fff; font-size: 10px; font-weight: 700; width: 18px; height: 18px; border-radius: 50%; display: flex; align-items: center; justify-content: center; }
.shop-header__mobile-toggle { display: flex; align-items: center; justify-content: center; width: 40px; height: 40px; border: none; background: none; font-size: 20px; color: var(--color-text); border-radius: var(--radius-md); }
.shop-header__mobile-toggle:hover { background: var(--color-surface); }
@media(min-width:768px) { .shop-header__search { display: block; } .shop-header__mobile-toggle { display: none; } }

/* --- NAVIGATION --- */
.shop-nav { background: #fff; border-bottom: 1px solid var(--color-border); display: none; }
.shop-nav__list { display: flex; gap: 0; }
.shop-nav__item { position: relative; }
.shop-nav__link { display: flex; align-items: center; gap: 4px; padding: 12px 16px; font-size: var(--text-sm); font-weight: 500; color: var(--color-text); transition: color var(--transition), background var(--transition); }
.shop-nav__link:hover { color: var(--color-primary); background: var(--color-surface); }
.shop-nav__link i { font-size: 10px; opacity: .5; }
.shop-nav__dropdown { display: none; position: absolute; top: 100%; left: 0; min-width: 200px; background: #fff; border: 1px solid var(--color-border); border-radius: var(--radius-md); box-shadow: var(--shadow-lg); padding: var(--space-sm) 0; z-index: 100; }
.shop-nav__dropdown a { display: block; padding: 8px 16px; font-size: var(--text-sm); color: var(--color-text); }
.shop-nav__dropdown a:hover { background: var(--color-surface); color: var(--color-primary); }
.shop-nav__item--has-dropdown:hover .shop-nav__dropdown { display: block; }
@media(min-width:768px) { .shop-nav { display: block; position: fixed; top: calc(28px + var(--header-h)); left: 0; right: 0; z-index: 999; } .main-content { padding-top: calc(28px + var(--header-h) + 44px); } }

/* --- MOBILE DRAWER --- */
.mobile-drawer { position: fixed; inset: 0; z-index: 2000; visibility: hidden; }
.mobile-drawer.is-open { visibility: visible; }
.mobile-drawer__overlay { position: absolute; inset: 0; background: rgba(0,0,0,.4); opacity: 0; transition: opacity .3s; }
.mobile-drawer.is-open .mobile-drawer__overlay { opacity: 1; }
.mobile-drawer__panel { position: absolute; top: 0; right: 0; bottom: 0; width: 280px; background: #fff; transform: translateX(100%); transition: transform .3s ease; display: flex; flex-direction: column; }
.mobile-drawer.is-open .mobile-drawer__panel { transform: translateX(0); }
.mobile-drawer__header { display: flex; align-items: center; justify-content: space-between; padding: var(--space-lg) var(--space-md); border-bottom: 1px solid var(--color-border); }
.mobile-drawer__title { font-weight: 700; font-size: var(--text-lg); }
.mobile-drawer__close { width: 36px; height: 36px; border: none; background: var(--color-surface); border-radius: var(--radius-md); font-size: 16px; display: flex; align-items: center; justify-content: center; }
.mobile-drawer__nav { flex: 1; overflow-y: auto; padding: var(--space-md) 0; }
.mobile-drawer__link { display: flex; align-items: center; gap: 12px; padding: 14px var(--space-md); font-size: var(--text-base); font-weight: 500; color: var(--color-text); }
.mobile-drawer__link:hover { background: var(--color-surface); }
.mobile-drawer__link i { width: 20px; text-align: center; color: var(--color-accent); }
.mobile-drawer__footer { padding: var(--space-md); border-top: 1px solid var(--color-border); font-size: var(--text-xs); color: var(--color-text-secondary); line-height: 1.5; }

/* --- HERO --- */
.hero { background: linear-gradient(135deg, var(--color-primary) 0%, #2563eb 50%, var(--color-primary-dark) 100%); color: var(--color-text-inverse); padding: var(--space-3xl) 0; text-align: center; }
.hero__title { font-size: var(--text-3xl); font-weight: 800; margin-bottom: var(--space-md); letter-spacing: -0.5px; color: #fff; }
.hero__subtitle { font-size: var(--text-base); opacity: .9; max-width: 560px; margin: 0 auto var(--space-xl); }
.hero__actions { display: flex; flex-direction: column; gap: var(--space-sm); max-width: 340px; margin: 0 auto; }
@media(min-width:640px) { .hero__title { font-size: var(--text-4xl); } .hero__actions { flex-direction: row; max-width: none; justify-content: center; } }

/* --- BUTTONS --- */
.btn { display: inline-flex; align-items: center; justify-content: center; gap: 8px; padding: 12px 24px; border-radius: var(--radius-md); font-size: var(--text-sm); font-weight: 600; border: none; cursor: pointer; transition: all var(--transition); text-decoration: none; line-height: 1; white-space: nowrap; }
.btn:focus-visible { outline: 2px solid var(--color-primary); outline-offset: 2px; }
.btn-primary { background: var(--color-primary); color: #fff; }
.btn-primary:hover { background: var(--color-primary-dark); color: #fff; transform: translateY(-1px); box-shadow: var(--shadow-md); }
.btn-accent { background: var(--color-accent); color: #fff; }
.btn-accent:hover { background: var(--color-accent-dark); color: #fff; transform: translateY(-1px); box-shadow: var(--shadow-md); }
.btn-secondary { background: transparent; color: var(--color-primary); border: 2px solid var(--color-border); }
.btn-secondary:hover { border-color: var(--color-primary); background: var(--color-surface); }
.btn-ghost { background: none; color: var(--color-text-secondary); padding: 8px 12px; }
.btn-ghost:hover { color: var(--color-primary); background: var(--color-surface); }
.btn-sm { padding: 8px 14px; font-size: var(--text-xs); }
.btn-lg { padding: 16px 32px; font-size: var(--text-base); }
.btn-full { width: 100%; }
.btn:disabled, .btn.disabled { opacity: .5; cursor: not-allowed; transform: none !important; }

/* --- INPUTS --- */
.input, .select, .textarea { width: 100%; padding: 12px 16px; border: 1px solid var(--color-border); border-radius: var(--radius-md); font-size: var(--text-base); font-family: var(--font); background: #fff; transition: border-color var(--transition), box-shadow var(--transition); }
.input:focus, .select:focus, .textarea:focus { outline: none; border-color: var(--color-primary); box-shadow: 0 0 0 3px rgba(27,58,92,.1); }
.input-error { border-color: var(--color-error); }
.input-group { position: relative; }
.input-group i { position: absolute; left: 14px; top: 50%; transform: translateY(-50%); color: var(--color-text-secondary); }
.input-group .input { padding-left: 40px; }
.label { display: block; font-size: var(--text-sm); font-weight: 600; margin-bottom: 6px; color: var(--color-text); }

/* --- CARDS --- */
.card { background: #fff; border: 1px solid var(--color-border); border-radius: var(--radius-lg); padding: var(--space-lg); transition: all var(--transition); }
.card--hover:hover { border-color: var(--color-primary); box-shadow: var(--shadow-md); transform: translateY(-2px); }
.card__icon { width: 48px; height: 48px; border-radius: var(--radius-md); background: var(--color-surface); display: flex; align-items: center; justify-content: center; margin-bottom: var(--space-md); font-size: 20px; color: var(--color-accent); }
.card__title { font-size: var(--text-lg); font-weight: 700; margin-bottom: var(--space-xs); }
.card__desc { font-size: var(--text-sm); color: var(--color-text-secondary); margin: 0; line-height: 1.5; }

/* --- PRODUCT CARD --- */
.product-card { display: flex; flex-direction: column; background: #fff; border: 1px solid var(--color-border); border-radius: var(--radius-lg); overflow: hidden; transition: all var(--transition); height: 100%; }
.product-card:hover { border-color: var(--color-primary); box-shadow: var(--shadow-md); transform: translateY(-2px); }
.product-card__image { aspect-ratio: 1/1; display: flex; align-items: center; justify-content: center; background: var(--color-surface-2); padding: var(--space-md); overflow: hidden; }
.product-card__image img { max-width: 100%; max-height: 100%; object-fit: contain; transition: transform var(--transition); }
.product-card:hover .product-card__image img { transform: scale(1.03); }
.product-card__body { padding: var(--space-md); display: flex; flex-direction: column; flex: 1; gap: var(--space-xs); }
.product-card__category { font-size: var(--text-xs); color: var(--color-text-secondary); text-transform: uppercase; letter-spacing: 0.5px; font-weight: 600; }
.product-card__title { font-size: var(--text-sm); font-weight: 600; color: var(--color-text); line-height: 1.3; display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; min-height: 2.6em; }
.product-card__title a { color: inherit; }
.product-card__voltage { font-size: var(--text-xs); color: var(--color-primary); display: flex; align-items: center; gap: 4px; }
.product-card__footer { display: flex; align-items: center; justify-content: space-between; margin-top: auto; padding-top: var(--space-sm); }
.product-card__price { font-size: var(--text-lg); font-weight: 800; color: var(--color-warning); }
.product-card__action { margin-top: var(--space-sm); }

/* --- PRODUCTS GRID --- */
.products-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: var(--space-md); }
@media(min-width:640px) { .products-grid { grid-template-columns: repeat(2, 1fr); gap: var(--space-lg); } }
@media(min-width:768px) { .products-grid { grid-template-columns: repeat(3, 1fr); } }
@media(min-width:1024px) { .products-grid { grid-template-columns: repeat(3, 1fr); } }
@media(min-width:1280px) { .products-grid { grid-template-columns: repeat(4, 1fr); } }

/* --- CATALOG --- */
.catalog-header { display: flex; align-items: baseline; justify-content: space-between; margin-bottom: var(--space-lg); }
.catalog-header h1 { margin: 0; }
.catalog-filters { margin-bottom: var(--space-xl); display: flex; flex-direction: column; gap: var(--space-md); }
.catalog-filters__search { max-width: 400px; }
.catalog-filters__tags { display: flex; flex-wrap: wrap; gap: var(--space-sm); }

/* --- BREADCRUMB --- */
.breadcrumb { display: flex; align-items: center; gap: var(--space-sm); font-size: var(--text-sm); color: var(--color-text-secondary); margin-bottom: var(--space-lg); }
.breadcrumb a { color: var(--color-text-secondary); }
.breadcrumb a:hover { color: var(--color-primary); }

/* --- BADGES --- */
.badge { display: inline-flex; align-items: center; gap: 4px; padding: 4px 10px; border-radius: var(--radius-full); font-size: var(--text-xs); font-weight: 600; background: var(--color-surface-2); color: var(--color-text-secondary); transition: all var(--transition); text-decoration: none; }
.badge:hover { background: var(--color-surface); }
.badge-active { background: var(--color-primary); color: #fff; }
.badge-success { background: #dcfce7; color: var(--color-success); }
.badge-warning { background: #fef3c7; color: #92400e; }
.badge-error { background: #fef2f2; color: var(--color-error); }
.badge-info { background: #eff6ff; color: var(--color-primary); }

/* --- ALERTS --- */
.alert { padding: var(--space-md); border-radius: var(--radius-md); font-size: var(--text-sm); display: flex; align-items: flex-start; gap: var(--space-sm); }
.alert-info { background: #eff6ff; color: var(--color-primary); border: 1px solid #bfdbfe; }
.alert-warning { background: #fef3c7; color: #92400e; border: 1px solid #fde68a; }
.alert-success { background: #dcfce7; color: var(--color-success); border: 1px solid #bbf7d0; }
.alert-error { background: #fef2f2; color: var(--color-error); border: 1px solid #fecaca; }

/* --- EMPTY STATE --- */
.empty-state { text-align: center; padding: var(--space-3xl) var(--space-md); color: var(--color-text-secondary); }
.empty-state i { font-size: 48px; margin-bottom: var(--space-md); opacity: .3; }
.empty-state h3 { color: var(--color-text); margin-bottom: var(--space-sm); }

/* --- FOOTER --- */
.shop-footer { background: var(--color-dark); color: #cbd5e1; margin-top: var(--space-3xl); }
.shop-footer .container { padding-top: var(--space-2xl); padding-bottom: var(--space-lg); }
.shop-footer__grid { display: grid; grid-template-columns: 1fr; gap: var(--space-xl); margin-bottom: var(--space-xl); }
@media(min-width:640px) { .shop-footer__grid { grid-template-columns: repeat(2, 1fr); } }
@media(min-width:1024px) { .shop-footer__grid { grid-template-columns: 1.5fr 1fr 1fr 1fr; } }
.shop-footer__title { color: #fff; font-size: var(--text-base); font-weight: 700; margin-bottom: var(--space-md); }
.shop-footer__desc { font-size: var(--text-sm); line-height: 1.6; max-width: 300px; }
.shop-footer__trust { display: flex; flex-direction: column; gap: var(--space-sm); margin-top: var(--space-md); font-size: var(--text-xs); }
.shop-footer__trust span { display: flex; align-items: center; gap: 6px; }
.shop-footer__trust i { color: var(--color-accent); width: 16px; }
.shop-footer__links { display: flex; flex-direction: column; gap: var(--space-sm); }
.shop-footer__links li { font-size: var(--text-sm); }
.shop-footer__links a { color: #cbd5e1; }
.shop-footer__links a:hover { color: #fff; }
.shop-footer__links i { width: 16px; margin-right: 6px; }
.shop-footer__company { border-top: 1px solid rgba(255,255,255,.1); padding-top: var(--space-lg); display: flex; flex-direction: column; gap: var(--space-md); font-size: var(--text-xs); line-height: 1.6; }
.shop-footer__company strong { color: #fff; }
.shop-footer__payments { display: flex; gap: var(--space-sm); flex-wrap: wrap; }
.shop-footer__payments .badge { background: rgba(255,255,255,.08); color: #fff; border: 1px solid rgba(255,255,255,.12); }
.shop-footer__bottom { background: rgba(0,0,0,.2); }
.shop-footer__bottom .container { padding-top: var(--space-md); padding-bottom: var(--space-md); }
.shop-footer__bottom span { font-size: var(--text-xs); color: #94a3b8; }
@media(min-width:768px) { .shop-footer__company { flex-direction: row; justify-content: space-between; align-items: center; } }

/* --- UTILITIES --- */
.text-center { text-align: center; }
.text-secondary { color: var(--color-text-secondary); }
.text-sm { font-size: var(--text-sm); }
.sr-only { position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px; overflow: hidden; clip: rect(0,0,0,0); border: 0; }
.hidden { display: none !important; }