/*!
 * KetaabOn Design System - assets/css/main.css | RTL-first, Mobile-first, OKLCH
 */
:root {
  --ko-primary: oklch(0.62 0.11 185);
  --ko-primary-dark: oklch(0.5 0.11 185);
  --ko-primary-soft: oklch(0.95 0.03 185);
  --ko-accent: oklch(0.72 0.15 55);
  --ko-accent-dark: oklch(0.6 0.15 55);
  --ko-accent-soft: oklch(0.96 0.03 55);
  --ko-bg: oklch(0.985 0.004 90);
  --ko-surface: oklch(1 0 0);
  --ko-surface-2: oklch(0.97 0.004 90);
  --ko-text: oklch(0.27 0.02 250);
  --ko-text-muted: oklch(0.5 0.02 250);
  --ko-border: oklch(0.9 0.01 250);
  --ko-success: oklch(0.65 0.14 150);
  --ko-danger: oklch(0.58 0.19 25);
  --ko-warning: oklch(0.78 0.15 85);
  --ko-fs-xs: .75rem; --ko-fs-sm: .875rem; --ko-fs-md: 1rem; --ko-fs-lg: 1.25rem;
  --ko-fs-xl: 1.5rem; --ko-fs-2xl: 2rem; --ko-fs-hero: clamp(1.75rem, 4vw, 2.75rem);
  --ko-font: 'Vazirmatn', Tahoma, sans-serif;
  --ko-sp-1: .25rem; --ko-sp-2: .5rem; --ko-sp-3: .75rem; --ko-sp-4: 1rem;
  --ko-sp-6: 1.5rem; --ko-sp-8: 2rem; --ko-sp-12: 3rem; --ko-sp-16: 4rem;
  --ko-radius-sm: 8px; --ko-radius-md: 12px; --ko-radius-lg: 18px; --ko-radius-full: 999px;
  --ko-shadow-sm: 0 1px 3px oklch(0 0 0 / .08);
  --ko-shadow-md: 0 4px 14px oklch(0 0 0 / .1);
  --ko-shadow-lg: 0 10px 30px oklch(0 0 0 / .12);
  --ko-z-header: 100; --ko-z-drawer: 200; --ko-z-toast: 300; --ko-z-bottomnav: 150;
  --ko-container: 1200px; --ko-header-h: 64px;
}
[data-theme="dark"] {
  --ko-bg: oklch(0.17 0.01 250);
  --ko-surface: oklch(0.22 0.012 250);
  --ko-surface-2: oklch(0.27 0.014 250);
  --ko-text: oklch(0.93 0.01 250);
  --ko-text-muted: oklch(0.68 0.015 250);
  --ko-border: oklch(0.34 0.015 250);
  --ko-primary-soft: oklch(0.3 0.05 185);
  --ko-accent-soft: oklch(0.32 0.05 55);
}
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --ko-bg: oklch(0.17 0.01 250);
    --ko-surface: oklch(0.22 0.012 250);
    --ko-surface-2: oklch(0.27 0.014 250);
    --ko-text: oklch(0.93 0.01 250);
    --ko-text-muted: oklch(0.68 0.015 250);
    --ko-border: oklch(0.34 0.015 250);
  }
}
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation-duration: .01ms !important; transition-duration: .01ms !important; }
}
/* Reset */
*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; overflow-x: hidden; }
body { margin: 0; font-family: var(--ko-font); font-size: var(--ko-fs-md); line-height: 1.6; direction: rtl; text-align: right; color: var(--ko-text); background: var(--ko-bg); padding-bottom: calc(64px + env(safe-area-inset-bottom)); }
h1,h2,h3,h4 { line-height: 1.35; margin: 0 0 var(--ko-sp-4); font-weight: 700; }
p { margin: 0 0 var(--ko-sp-4); }
a { color: var(--ko-primary-dark); text-decoration: none; }
a:hover { color: var(--ko-primary); }
img { max-width: 100%; height: auto; }
ul, ol { padding-inline-start: var(--ko-sp-6); }
:focus-visible { outline: 3px solid var(--ko-accent); outline-offset: 2px; border-radius: 4px; }
.screen-reader-text { position: absolute !important; width: 1px; height: 1px; overflow: hidden; clip: rect(1px,1px,1px,1px); }
.skip-link:focus { position: fixed; inset-inline-start: 1rem; top: 1rem; width: auto; height: auto; clip: auto; z-index: 999; background: var(--ko-surface); padding: var(--ko-sp-2) var(--ko-sp-4); border-radius: var(--ko-radius-sm); box-shadow: var(--ko-shadow-md); }
/* Layout */
.ko-container { width: 100%; max-width: var(--ko-container); margin-inline: auto; padding-inline: var(--ko-sp-4); }
.ko-grid { display: grid; gap: var(--ko-sp-4); }
.ko-flex { display: flex; gap: var(--ko-sp-3); align-items: center; }
.ko-flex-between { display: flex; justify-content: space-between; align-items: center; gap: var(--ko-sp-3); }
.ko-section { padding-block: var(--ko-sp-8); }
.ko-section-title { font-size: var(--ko-fs-xl); margin-bottom: var(--ko-sp-6); }
.ko-text-center { text-align: center; }
.ko-muted { color: var(--ko-text-muted); }
.ko-hide-mobile { display: none; }
/* Buttons */
.ko-btn { display: inline-flex; align-items: center; justify-content: center; gap: var(--ko-sp-2); padding: .65rem 1.4rem; border-radius: var(--ko-radius-full); border: 1px solid transparent; font-family: inherit; font-size: var(--ko-fs-sm); font-weight: 600; cursor: pointer; transition: background .2s, color .2s, transform .15s, box-shadow .2s; text-align: center; }
.ko-btn:active { transform: scale(.97); }
.ko-btn-primary { background: var(--ko-primary); color: oklch(1 0 0); box-shadow: var(--ko-shadow-sm); }
.ko-btn-primary:hover { background: var(--ko-primary-dark); color: oklch(1 0 0); }
.ko-btn-secondary { background: var(--ko-accent-soft); color: var(--ko-accent-dark); border-color: oklch(0.85 0.06 55); }
.ko-btn-secondary:hover { background: var(--ko-accent); color: oklch(1 0 0); }
.ko-btn-ghost { background: transparent; color: var(--ko-text); border-color: var(--ko-border); }
.ko-btn-ghost:hover { background: var(--ko-surface-2); }
.ko-btn-danger { background: var(--ko-danger); color: oklch(1 0 0); }
.ko-btn-block { width: 100%; }
.ko-btn-lg { padding: .85rem 2rem; font-size: var(--ko-fs-md); }
.ko-btn-sm { padding: .4rem 1rem; font-size: var(--ko-fs-xs); }

/* Header */
.ko-header { position: sticky; top: 0; z-index: var(--ko-z-header); background: color-mix(in oklab, var(--ko-surface) 92%, transparent); backdrop-filter: blur(10px); border-bottom: 1px solid var(--ko-border); transition: box-shadow .25s; }
.ko-header.is-stuck { box-shadow: var(--ko-shadow-md); }
.ko-header__inner { display: flex; align-items: center; gap: var(--ko-sp-3); min-height: var(--ko-header-h); padding-block: var(--ko-sp-2); }
.ko-logo { font-size: var(--ko-fs-lg); font-weight: 800; color: var(--ko-primary-dark); display: flex; align-items: center; gap: var(--ko-sp-2); }
.ko-logo img { max-height: 40px; width: auto; }
.ko-search-form { flex: 1; display: flex; position: relative; }
.ko-search-form input[type="search"] { width: 100%; border: 1px solid var(--ko-border); border-radius: var(--ko-radius-full); padding: .6rem 1.2rem; font-family: inherit; background: var(--ko-surface-2); color: var(--ko-text); }
.ko-search-form input[type="search"]:focus { border-color: var(--ko-primary); outline: none; }
.ko-search-suggestions { position: absolute; top: calc(100% + 6px); inset-inline: 0; background: var(--ko-surface); border: 1px solid var(--ko-border); border-radius: var(--ko-radius-md); box-shadow: var(--ko-shadow-lg); padding: var(--ko-sp-2); display: none; z-index: 10; }
.ko-search-suggestions.is-open { display: block; }
.ko-search-suggestions a { display: block; padding: var(--ko-sp-2) var(--ko-sp-3); border-radius: var(--ko-radius-sm); font-size: var(--ko-fs-sm); }
.ko-search-suggestions a:hover { background: var(--ko-surface-2); }
.ko-header__actions { display: flex; align-items: center; gap: var(--ko-sp-2); }
.ko-icon-btn { position: relative; display: inline-flex; align-items: center; justify-content: center; width: 2.6rem; height: 2.6rem; border-radius: var(--ko-radius-full); background: transparent; border: 0; cursor: pointer; color: var(--ko-text); font-size: 1.2rem; }
.ko-icon-btn:hover { background: var(--ko-surface-2); }
.ko-cart-count { background: var(--ko-accent); color: oklch(1 0 0); border-radius: var(--ko-radius-full); min-width: 1.4em; height: 1.4em; display: inline-flex; align-items: center; justify-content: center; font-size: var(--ko-fs-xs); font-weight: 700; position: absolute; top: 0; inset-inline-start: 0; }
.ko-nav-desktop { display: none; }
.ko-nav-desktop ul { list-style: none; display: flex; gap: var(--ko-sp-6); margin: 0; padding: 0; font-size: var(--ko-fs-sm); font-weight: 600; }
.ko-nav-desktop .menu-item-has-children { position: relative; }
.ko-nav-desktop .sub-menu { position: absolute; top: 100%; inset-inline-start: 0; background: var(--ko-surface); border: 1px solid var(--ko-border); border-radius: var(--ko-radius-md); box-shadow: var(--ko-shadow-lg); min-width: 200px; display: none; z-index: 20; }
.ko-nav-desktop .menu-item-has-children:hover > .sub-menu { display: block; }
.ko-nav-desktop .sub-menu li { padding: var(--ko-sp-2) var(--ko-sp-3); }
/* Mobile bottom nav */
.ko-bottom-nav { position: fixed; bottom: 0; inset-inline: 0; z-index: var(--ko-z-bottomnav); background: var(--ko-surface); border-top: 1px solid var(--ko-border); display: grid; grid-template-columns: repeat(5, 1fr); padding-block: .4rem calc(.4rem + env(safe-area-inset-bottom)); }
.ko-bottom-nav a { display: flex; flex-direction: column; align-items: center; gap: 2px; font-size: var(--ko-fs-xs); color: var(--ko-text-muted); padding: var(--ko-sp-1); }
.ko-bottom-nav a.is-active { color: var(--ko-primary-dark); }
.ko-bottom-nav .ko-sell-nav { background: var(--ko-accent); color: oklch(1 0 0) !important; border-radius: var(--ko-radius-full); margin-inline: .25rem; font-weight: 700; }
.ko-bottom-nav .ko-sell-nav:hover { background: var(--ko-accent-dark); }
/* Hero */
.ko-hero { background: linear-gradient(135deg, var(--ko-primary-soft), var(--ko-accent-soft)); border-radius: var(--ko-radius-lg); padding: var(--ko-sp-8) var(--ko-sp-4); text-align: center; margin-block: var(--ko-sp-4); }
.ko-hero h1 { font-size: var(--ko-fs-hero); }
.ko-hero p { color: var(--ko-text-muted); max-width: 34rem; margin-inline: auto; }
.ko-hero__ctas { display: flex; flex-wrap: wrap; gap: var(--ko-sp-3); justify-content: center; margin-top: var(--ko-sp-6); }
/* Category grid */
.ko-cat-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: var(--ko-sp-3); }
.ko-cat-card { display: flex; flex-direction: column; align-items: center; gap: var(--ko-sp-2); background: var(--ko-surface); border: 1px solid var(--ko-border); border-radius: var(--ko-radius-md); padding: var(--ko-sp-6) var(--ko-sp-3); font-weight: 600; color: var(--ko-text); transition: transform .2s, box-shadow .2s; }
.ko-cat-card:hover { transform: translateY(-3px); box-shadow: var(--ko-shadow-md); color: var(--ko-primary-dark); }
.ko-cat-card__icon { font-size: 1.75rem; }
/* Cards */
.ko-cards-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(160px, 1fr)); gap: var(--ko-sp-4); }
.ko-book-card, .ko-listing-card { background: var(--ko-surface); border: 1px solid var(--ko-border); border-radius: var(--ko-radius-lg); overflow: hidden; display: flex; flex-direction: column; transition: transform .2s, box-shadow .2s; position: relative; }
.ko-book-card:hover, .ko-listing-card:hover { transform: translateY(-3px); box-shadow: var(--ko-shadow-md); }
.ko-book-card__cover { aspect-ratio: 3/4; width: 100%; object-fit: cover; background: var(--ko-surface-2); display: block; }
.ko-book-card__body { padding: var(--ko-sp-3); display: flex; flex-direction: column; gap: var(--ko-sp-1); flex: 1; }
.ko-book-card__title { font-size: var(--ko-fs-sm); font-weight: 700; margin: 0; }
.ko-book-card__meta { font-size: var(--ko-fs-xs); color: var(--ko-text-muted); }
.ko-book-card__price { font-size: var(--ko-fs-sm); font-weight: 800; color: var(--ko-accent-dark); margin-top: auto; }
.ko-book-card .ko-btn { margin: 0 var(--ko-sp-3) var(--ko-sp-3); }
.ko-badge { display: inline-flex; align-items: center; gap: .25rem; padding: .15rem .6rem; border-radius: var(--ko-radius-full); font-size: var(--ko-fs-xs); font-weight: 600; width: fit-content; }
.ko-badge--new { background: oklch(0.93 0.05 150); color: oklch(0.4 0.1 150); }
.ko-badge--great { background: oklch(0.93 0.05 185); color: oklch(0.4 0.1 185); }
.ko-badge--good { background: oklch(0.94 0.05 90); color: oklch(0.45 0.1 90); }
.ko-badge--used { background: oklch(0.92 0.05 60); color: oklch(0.45 0.1 60); }
.ko-badge--poor { background: oklch(0.92 0.05 25); color: oklch(0.45 0.12 25); }
.ko-badge--pending { background: var(--ko-surface-2); color: var(--ko-text-muted); border: 1px dashed var(--ko-border); }
.ko-listing-card__body { padding: var(--ko-sp-3); display: flex; flex-direction: column; gap: var(--ko-sp-2); flex: 1; }
.ko-listing-card__price { font-size: var(--ko-fs-lg); font-weight: 800; color: var(--ko-accent-dark); }
.ko-seller-row { display: flex; align-items: center; gap: var(--ko-sp-2); font-size: var(--ko-fs-xs); color: var(--ko-text-muted); flex-wrap: wrap; }
.ko-stars { color: oklch(0.78 0.15 85); letter-spacing: 1px; unicode-bidi: plaintext; }

/* Search page / filters */
.ko-search-layout { display: grid; gap: var(--ko-sp-6); }
.ko-filters { background: var(--ko-surface); border: 1px solid var(--ko-border); border-radius: var(--ko-radius-lg); padding: var(--ko-sp-4); }
.ko-filter-group { border-bottom: 1px solid var(--ko-border); padding-block: var(--ko-sp-3); }
.ko-filter-group:last-child { border-bottom: 0; }
.ko-filter-group > h3 { font-size: var(--ko-fs-sm); margin: 0 0 var(--ko-sp-2); cursor: pointer; }
.ko-filter-group label { display: flex; align-items: center; gap: var(--ko-sp-2); font-size: var(--ko-fs-sm); padding-block: .2rem; cursor: pointer; }
.ko-range-slider { width: 100%; accent-color: var(--ko-primary); }
.ko-filter-drawer { position: fixed; inset: 0; z-index: var(--ko-z-drawer); background: oklch(0 0 0 / .45); display: none; }
.ko-filter-drawer.is-open { display: block; }
.ko-filter-drawer__panel { position: absolute; inset-block: 0; inset-inline-end: 0; width: min(320px, 85vw); background: var(--ko-surface); padding: var(--ko-sp-4); overflow-y: auto; }
.ko-filter-drawer__close { position: absolute; top: var(--ko-sp-2); inset-inline-start: var(--ko-sp-2); }
.ko-sort-bar { display: flex; flex-wrap: wrap; align-items: center; gap: var(--ko-sp-2); margin-bottom: var(--ko-sp-4); }
.ko-sort-bar select { padding: .45rem .9rem; border-radius: var(--ko-radius-full); border: 1px solid var(--ko-border); background: var(--ko-surface); font-family: inherit; }
/* Wizard / stepper */
.ko-wizard { background: var(--ko-surface); border: 1px solid var(--ko-border); border-radius: var(--ko-radius-lg); padding: var(--ko-sp-6) var(--ko-sp-4); max-width: 640px; margin-inline: auto; }
.ko-progress { height: 8px; background: var(--ko-surface-2); border-radius: var(--ko-radius-full); overflow: hidden; margin-bottom: var(--ko-sp-6); }
.ko-progress__bar { height: 100%; width: 0; background: linear-gradient(90deg, var(--ko-primary), var(--ko-accent)); border-radius: var(--ko-radius-full); transition: width .3s; }
.ko-steps { display: flex; justify-content: space-between; margin-bottom: var(--ko-sp-6); counter-reset: ko-step; }
.ko-step-dot { display: flex; flex-direction: column; align-items: center; gap: .3rem; font-size: var(--ko-fs-xs); color: var(--ko-text-muted); flex: 1; text-align: center; }
.ko-step-dot::before { counter-increment: ko-step; content: counter(ko-step); width: 2rem; height: 2rem; border-radius: 50%; display: flex; align-items: center; justify-content: center; background: var(--ko-surface-2); border: 2px solid var(--ko-border); font-weight: 700; margin-inline: auto; }
.ko-step-dot.is-active::before { background: var(--ko-primary); border-color: var(--ko-primary); color: oklch(1 0 0); }
.ko-step-dot.is-done::before { background: var(--ko-success); border-color: var(--ko-success); color: oklch(1 0 0); content: "\2713"; }
.ko-wizard-step { display: none; }
.ko-wizard-step.is-active { display: block; animation: koFade .25s ease; }
@keyframes koFade { from { opacity: 0; transform: translateY(8px); } to { opacity: 1; transform: none; } }
.ko-wizard-nav { display: flex; justify-content: space-between; gap: var(--ko-sp-3); margin-top: var(--ko-sp-6); }
.ko-condition-options { display: grid; grid-template-columns: repeat(auto-fill, minmax(130px,1fr)); gap: var(--ko-sp-3); }
.ko-condition-option { position: relative; }
.ko-condition-option input { position: absolute; opacity: 0; }
.ko-condition-option label { display: block; text-align: center; padding: var(--ko-sp-3); border: 2px solid var(--ko-border); border-radius: var(--ko-radius-md); cursor: pointer; font-weight: 600; transition: all .15s; }
.ko-condition-option input:checked + label { border-color: var(--ko-primary); background: var(--ko-primary-soft); color: var(--ko-primary-dark); }
.ko-upload-grid { display: grid; grid-template-columns: repeat(2,1fr); gap: var(--ko-sp-3); }
.ko-upload-box { border: 2px dashed var(--ko-border); border-radius: var(--ko-radius-md); padding: var(--ko-sp-4); text-align: center; cursor: pointer; transition: border-color .2s; font-size: var(--ko-fs-sm); }
.ko-upload-box:hover, .ko-upload-box.is-dragover { border-color: var(--ko-primary); }
.ko-upload-box img { max-height: 100px; margin-top: var(--ko-sp-2); border-radius: var(--ko-radius-sm); }
.ko-price-input { font-size: var(--ko-fs-xl); font-weight: 800; text-align: center; letter-spacing: 1px; }
/* Forms */
input[type="text"], input[type="email"], input[type="tel"], input[type="number"], input[type="password"], input[type="search"], input[type="url"], select, textarea {
  width: 100%; padding: .6rem 1rem; border: 1px solid var(--ko-border); border-radius: var(--ko-radius-md);
  font-family: inherit; font-size: var(--ko-fs-sm); background: var(--ko-surface); color: var(--ko-text);
}
input:focus, select:focus, textarea:focus { border-color: var(--ko-primary); outline: none; box-shadow: 0 0 0 3px color-mix(in oklab, var(--ko-primary) 20%, transparent); }
.ko-form-row { margin-bottom: var(--ko-sp-4); }
.ko-form-row > label { display: block; font-size: var(--ko-fs-sm); font-weight: 600; margin-bottom: var(--ko-sp-1); }
.ko-form-error { color: var(--ko-danger); font-size: var(--ko-fs-xs); margin-top: var(--ko-sp-1); display: none; }
.ko-form-error.is-visible { display: block; }