/* ==========================================================================
   Re-AI — design tokens
   ========================================================================== */
:root{
  --paper:         #F6EFE0;
  --paper-edge:    #E4D8B8;
  --ink:           #211C10;
  --ink-soft:      #5B5340;

  --cream:         #ECE7DA;
  --cream-dim:     #A9A797;

  /* primary accent — indigo blue (replaces the old brass/gold) */
  --accent:        #4C63D2;
  --accent-light:  #6E82E8;
  --accent-dim:    #37469E;
  --accent-tint:   #171D40;
  --on-accent:     #F5F7FF;

  --cat-journals:  #2F8F86;
  --cat-ai:        #7C5CE0;
  --cat-learning:  #C1613F;
  --cat-viz:       #4F7CAC;
  --cat-lang:      #B4577A;
  --cat-community: #7C8F45;
  --cat-databases: #5B6B7F;
  --cat-academic:  #A9762D;

  /* darker variants used behind white tag text — WCAG AA at small sizes */
  --cat-journals-tag:  #1F615B;
  --cat-ai-tag:        #4E3796;
  --cat-learning-tag:  #83412a;
  --cat-viz-tag:       #345770;
  --cat-lang-tag:      #7C3955;
  --cat-community-tag: #566333;
  --cat-databases-tag: #3C4753;
  --cat-academic-tag:  #7A551E;

  --radius-card:   18px;
  --radius-pill:   999px;
  --radius-sm:     8px;

  --font-display:  "IBM Plex Sans", "IBM Plex Sans Arabic", sans-serif;
  --font-body:      "IBM Plex Sans", "IBM Plex Sans Arabic", sans-serif;
  --font-mono:      "IBM Plex Mono", ui-monospace, monospace;

  --shadow-card:   0 1px 0 rgba(0,0,0,.4), 0 12px 24px -12px rgba(0,0,0,.55);
  --shadow-card-hover: 0 2px 0 rgba(0,0,0,.35), 0 22px 40px -16px rgba(0,0,0,.6);
  --shadow-pop:    0 20px 60px -20px rgba(0,0,0,.7);
  --shadow-accent: 0 10px 24px -10px rgba(76,99,210,.55);

  --safe-t: env(safe-area-inset-top, 0px);
  --safe-b: env(safe-area-inset-bottom, 0px);
  --safe-l: env(safe-area-inset-left, 0px);
  --safe-r: env(safe-area-inset-right, 0px);
}

/* ==========================================================================
   Theme — light (default) and dark
   ========================================================================== */
html[data-theme="light"]{
  --bg:            #F7F4EC;
  --bg-soft:       #FFFFFF;
  --bg-elevate:    #FFFFFF;
  --hairline:      #E1DAC5;
  --cream:         #241F14;
  --cream-dim:     #6E6555;
  --heading:       #17130C;
}
html[data-theme="dark"]{
  --bg:            #0E131A;
  --bg-soft:       #141B25;
  --bg-elevate:    #1A2230;
  --hairline:      #2A3342;
  --cream:         #ECE7DA;
  --cream-dim:     #A9A797;
  --heading:       #FFFFFF;

  /* card ("paper") colors — switch cards to a dark surface in dark mode */
  --paper:         #1A2230;
  --paper-edge:    #2A3342;
  --ink:           #ECE7DA;
  --ink-soft:      #A9A797;
}

html[lang="ckb"], html[lang="ar"]{
  --font-display: "IBM Plex Sans Arabic", "IBM Plex Sans", sans-serif;
  --font-body:    "IBM Plex Sans Arabic", "IBM Plex Sans", sans-serif;
}

/* ==========================================================================
   Reset
   ========================================================================== */
*, *::before, *::after{ box-sizing: border-box; }
html{ -webkit-text-size-adjust: 100%; text-size-adjust: 100%; }
body{
  margin:0;
  background: var(--bg);
  color: var(--cream);
  font-family: var(--font-body);
  font-size: 15.5px;
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  min-height: 100vh;
  position: relative;
}
h1,h2,h3,p,dl,dd,dt,ol{ margin:0; }
ol{ padding-inline-start: 1.2em; }
button{ font-family: inherit; }
img,svg{ display:block; max-width:100%; }
[hidden]{ display:none !important; }
:focus-visible{
  outline: 2px solid var(--accent-light);
  outline-offset: 3px;
  border-radius: 4px;
}
@media (prefers-reduced-motion: reduce){
  *{ animation-duration: .001ms !important; transition-duration: .001ms !important; }
}

.grain{
  position: fixed; inset:0; pointer-events:none; z-index:0; opacity:.05; mix-blend-mode: overlay;
  background-image: radial-gradient(rgba(255,255,255,.7) 1px, transparent 1px);
  background-size: 3px 3px;
}

/* ==========================================================================
   Topbar
   ========================================================================== */
.topbar{
  position: sticky; top:0; z-index:20;
  background: color-mix(in srgb, var(--bg) 88%, transparent);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--hairline);
  padding-top: var(--safe-t);
}
.topbar-inner{
  max-width: 1180px; margin-inline:auto;
  padding: 12px 20px;
  display:flex; align-items:center; justify-content:space-between; gap:16px;
  flex-wrap: wrap;
}
.brand{ display:flex; align-items:center; gap:11px; }
.brand-mark{ display:flex; flex-shrink:0; }
.brand-text{ display:flex; flex-direction:column; line-height:1.2; }
.brand-text strong{
  font-family: var(--font-display); font-weight:700; font-size:16px; letter-spacing:-.01em; color: var(--heading);
}
.brand-text em{ font-style:normal; font-size:11.5px; color: var(--cream-dim); }

.topbar-actions{ display:flex; align-items:center; gap:10px; flex-wrap:wrap; }

.lang-switch{ position:relative; }
.lang-trigger{ font-family: var(--font-body); }
.lang-trigger .chevron{ transition: transform .15s ease; flex-shrink:0; }
.lang-trigger[aria-expanded="true"] .chevron{ transform: rotate(180deg); }

.lang-menu{
  position:absolute; top: calc(100% + 8px); inset-inline-end:0;
  background: var(--bg-elevate); border:1px solid var(--hairline); border-radius:14px;
  box-shadow: var(--shadow-pop); padding:6px; min-width:152px; z-index:30;
  display:flex; flex-direction:column; gap:2px;
  animation: menu-in .14s ease;
}
@keyframes menu-in{ from{ opacity:0; transform: translateY(-4px) scale(.98);} to{ opacity:1; transform:none; } }
.lang-option{
  display:flex; align-items:center; justify-content:space-between; gap:14px;
  border:none; background:transparent; color: var(--cream-dim);
  font-size:13.5px; font-weight:600; padding:9px 12px; border-radius:9px; cursor:pointer;
  transition: background .12s ease, color .12s ease;
}
.lang-option:hover{ background: color-mix(in srgb, var(--accent) 12%, transparent); color: var(--heading); }
.lang-option.is-active{ color: var(--accent-light); }
.lang-option .check{ opacity:0; transition: opacity .12s ease; flex-shrink:0; }
.lang-option.is-active .check{ opacity:1; }

.install-btn{
  display:flex; align-items:center; gap:7px;
  background: var(--accent); color: var(--on-accent); border:none;
  font-size:13px; font-weight:600; padding:9px 15px; border-radius: var(--radius-pill);
  cursor:pointer; transition: transform .15s ease, background .15s ease, box-shadow .15s ease;
  box-shadow: var(--shadow-accent);
}
.install-btn:hover{ background: var(--accent-light); transform: translateY(-1px); }
.install-btn:active{ transform: scale(.96); }
.iphone-emoji{ font-size:15px; line-height:1; }

.icon-btn{
  display:flex; align-items:center; justify-content:center; gap:6px;
  background: var(--bg-elevate); color: var(--cream-dim); border:1px solid var(--hairline);
  font-size:12.5px; font-weight:600; padding:9px 12px; border-radius: var(--radius-pill);
  cursor:pointer; transition: color .15s ease, border-color .15s ease, background .15s ease, transform .12s ease;
  height:36px; box-sizing:border-box;
}
.icon-btn:hover{ color: var(--heading); border-color: var(--cream-dim); }
.icon-btn:active{ transform: scale(.94); }
.icon-btn svg{ flex-shrink:0; }

/* ==========================================================================
   Hero
   ========================================================================== */
main{ position:relative; z-index:1; }
.hero{
  max-width: 1180px; margin-inline:auto;
  padding: 56px 20px 30px;
}
.hero--compact{ padding: 28px 20px 18px; }
.hero-eyebrow{
  font-family: var(--font-mono); font-size:12px; letter-spacing:.14em; text-transform:uppercase;
  color: var(--accent-light); margin-bottom:14px; font-weight:600;
}
html[dir="rtl"] .hero-eyebrow{ letter-spacing:.02em; text-transform:none; }
.hero-title{
  font-size: clamp(32px, 6vw, 54px); font-weight:700; letter-spacing:-.015em;
  line-height:1.12; max-width: 16ch; color:#fff;
}
.hero-lede{
  margin-top:16px; max-width:58ch; font-size:16px; color: var(--cream-dim); line-height:1.68;
}
.hero-search{
  position:relative;
  margin-top:28px; max-width:520px;
  display:flex; align-items:center; gap:10px;
  background: var(--bg-elevate); border:1px solid var(--hairline);
  border-radius: var(--radius-pill); padding: 13px 18px;
  transition: border-color .15s ease, box-shadow .15s ease;
}
.search-clear{
  border:none; background:transparent; color: var(--cream-dim); cursor:pointer;
  display:flex; align-items:center; justify-content:center; padding:4px; flex-shrink:0;
  transition: color .15s ease, transform .12s ease;
}
.search-clear:hover{ color: var(--cream); }
.search-clear:active{ transform: scale(.9); }
.hero-meta{
  margin-top:12px; font-size:12px; color: var(--cream-dim); font-family: var(--font-mono);
  letter-spacing:.02em;
}
.search-icon{ color: var(--cream-dim); flex-shrink:0; }
.hero-search input{
  border:none; background:transparent; color: var(--cream); font-size:15px; width:100%;
  font-family: var(--font-body);
}
.hero-search input::placeholder{ color: var(--cream-dim); }
.hero-search input:focus{ outline:none; }
.hero-search:focus-within{ border-color: var(--accent-light); box-shadow: 0 0 0 3px color-mix(in srgb, var(--accent) 25%, transparent); }

.hero-stats{
  margin-top:34px; display:flex; gap:34px; flex-wrap:wrap;
  padding-top:22px; border-top:1px solid var(--hairline);
}
.hero-stats dt{ font-family: var(--font-mono); font-size:23px; font-weight:600; color: var(--accent-light); }
.hero-stats dd{ font-size:12.5px; color: var(--cream-dim); margin-top:2px; }

/* ==========================================================================
   Filters — 3-column category grid (native app-style tiles)
   ========================================================================== */
.filters{
  max-width: 700px; margin: 0 auto; padding: 6px 20px 24px;
  display:grid; grid-template-columns: repeat(3, 1fr); gap:10px;
}
.filter-tile{
  display:flex; flex-direction:column; align-items:center; justify-content:center; gap:5px;
  min-width:0; cursor:pointer; user-select:none;
  border:1px solid var(--hairline); background: var(--bg-soft); color: var(--cream-dim);
  border-radius: 16px; padding: 14px 6px 12px;
  text-align:center;
  transition: border-color .15s ease, color .15s ease, background .15s ease, transform .12s ease;
}
.filter-tile:hover{ color: var(--cream); border-color: var(--cream-dim); }
.filter-tile:active{ transform: scale(.96); }
.filter-tile .tile-emoji{ font-size:21px; line-height:1; }
.filter-tile .tile-label{
  font-size:11.5px; font-weight:700; line-height:1.25;
  overflow:hidden; text-overflow:ellipsis; white-space:nowrap; max-width:100%;
}
.filter-tile .tile-count{
  font-family: var(--font-mono); font-size:10px; color: var(--cream-dim); opacity:.7;
}
.filter-tile.is-active{
  background: var(--bg-elevate); color: var(--heading); border-color: var(--tile-color, var(--accent));
  box-shadow: inset 0 0 0 1.5px var(--tile-color, var(--accent));
}
.filter-tile.is-active .tile-count{ color: var(--tile-color, var(--accent-light)); opacity:1; }

.filter-tile--favs{
  color: #B8862E; border-color: color-mix(in srgb, #B8862E 45%, var(--hairline));
}
.filter-tile--favs:hover{ color:#B8862E; border-color:#B8862E; }
.filter-tile--favs.is-active{
  border-color:#B8862E; box-shadow: inset 0 0 0 1.5px #B8862E; color:#B8862E;
}
.filter-tile--favs.is-active .tile-count{ color:#B8862E; opacity:1; }

/* ==========================================================================
   Catalog grid
   ========================================================================== */
.catalog{
  max-width: 1180px; margin-inline:auto; padding: 10px 20px 44px;
  display:grid; grid-template-columns: repeat(auto-fill, minmax(272px, 1fr));
  gap:16px;
}

.card{
  position:relative;
  background: var(--paper); color: var(--ink);
  border-radius: var(--radius-card);
  border: 1px solid var(--paper-edge);
  padding: 20px 18px 18px;
  box-shadow: var(--shadow-card);
  display:flex; flex-direction:column; gap:10px;
  min-height: 190px;
  animation: card-in .35s ease backwards;
  transition: transform .18s ease, box-shadow .18s ease;
  cursor: pointer;
}
@keyframes card-in{ from{ opacity:0; transform: translateY(6px);} to{ opacity:1; transform:none; } }

@media (hover:hover){
  .card:hover{ transform: translateY(-3px); box-shadow: var(--shadow-card-hover); }
}

.card-hole{
  position:absolute; top:18px; inset-inline-start:18px;
  width:11px; height:11px; border-radius:50%;
  background: var(--bg);
  box-shadow: inset 0 1px 2px rgba(0,0,0,.5);
}
.card-fav{
  position:absolute; top:12px; inset-inline-end:12px; z-index:1;
  background:none; border:none; cursor:pointer; padding:4px;
  color: var(--paper-edge); line-height:0;
  transition: color .15s ease, transform .15s ease;
}
.card-fav:hover{ transform: scale(1.12); color:#B8862E; }
.card-fav.is-fav{ color:#C6912F; }
.card-fav svg{ display:block; }

.card-top{
  display:flex; align-items:center; justify-content:space-between; gap:10px;
  padding-inline-start: 26px;
  padding-inline-end: 22px;
}
.card-no{
  font-family: var(--font-mono); font-size:12px; font-weight:600; color: var(--accent-dim);
  letter-spacing:.03em;
}
.card-tag{
  font-family: var(--font-mono); font-size:9.5px; font-weight:600; text-transform:uppercase; letter-spacing:.03em;
  color:#fff; background: var(--tag-color, var(--accent-dim));
  padding:4px 9px; border-radius: var(--radius-pill); white-space:nowrap;
  max-width: 62%; overflow:hidden; text-overflow:ellipsis;
}
html[dir="rtl"] .card-tag{ text-transform:none; }

.card-title{
  font-size:17px; font-weight:700; line-height:1.35; padding-inline-start:26px;
}
.card-emoji{ margin-inline-end:7px; font-size:16px; }
.card-domain{
  display:block; font-family: var(--font-mono); font-size:10.5px; color: var(--ink-soft);
  padding-inline-start:26px; opacity:.75;
}
.card-rule{
  border:none; border-top: 1.5px dashed var(--paper-edge); margin: 0 0 0 26px;
}
html[dir="rtl"] .card-rule{ margin: 0 26px 0 0; }
.card-desc{
  font-size:13.5px; color: var(--ink-soft); line-height:1.58; flex-grow:1;
  padding-inline-start:26px;
}
.card-key{
  padding-inline-start:26px; display:flex; align-items:center; gap:8px; flex-wrap:wrap;
}
.card-key code{
  font-family: var(--font-mono); font-size:11.5px; background: rgba(0,0,0,.06);
  border:1px dashed var(--paper-edge); padding:5px 8px; border-radius:6px; color: var(--ink);
}
.copy-btn{
  border:1px solid var(--ink); background:transparent; color: var(--ink);
  font-size:11px; font-weight:600; padding:5px 10px; border-radius: var(--radius-pill); cursor:pointer;
  transition: background .15s ease, color .15s ease;
}
.copy-btn:hover{ background: var(--ink); color: var(--paper); }
.copy-btn.copied{ background: var(--cat-journals); border-color: var(--cat-journals); color:#fff; }

.card-footer{
  margin-top:4px; padding-inline-start:26px;
  display:flex; align-items:center; justify-content:space-between; gap:10px;
}
.card-cat-label{ font-size:11.5px; color: var(--ink-soft); }
.card-open{
  display:inline-flex; align-items:center; gap:6px;
  font-size:13px; font-weight:700; color: var(--ink); text-decoration:none;
  border-bottom: 1.5px solid var(--ink);
  padding-bottom:1px;
  transition: color .15s ease, border-color .15s ease;
}
.card-open:hover{ color: var(--accent-dim); border-color: var(--accent-dim); }
.card-open svg{ transition: transform .15s ease; }
html[dir="rtl"] .card-open svg{ transform: scaleX(-1); }
.card-open:hover svg{ transform: translateX(3px); }
html[dir="rtl"] .card-open:hover svg{ transform: scaleX(-1) translateX(3px); }

.card-share{
  border:1px solid var(--paper-edge); background:transparent; color: var(--ink-soft);
  width:30px; height:30px; border-radius:50%; display:flex; align-items:center; justify-content:center;
  cursor:pointer; transition: background .15s ease, color .15s ease, transform .12s ease;
  flex-shrink:0;
}
.card-share:hover{ background: var(--ink); color: var(--paper); }
.card-share:active{ transform: scale(.9); }

/* ==========================================================================
   Toast
   ========================================================================== */
.toast{
  position:fixed; left:50%; bottom: calc(24px + var(--safe-b)); transform: translateX(-50%) translateY(16px);
  background: var(--heading); color: var(--bg); font-size:13px; font-weight:600;
  padding:11px 22px; border-radius: var(--radius-pill); box-shadow: var(--shadow-pop);
  opacity:0; pointer-events:none; transition: opacity .2s ease, transform .2s ease; z-index:100;
  max-width: calc(100vw - 40px); text-align:center; white-space:nowrap; overflow:hidden; text-overflow:ellipsis;
}
.toast.show{ opacity:1; transform: translateX(-50%) translateY(0); }

/* ==========================================================================
   Empty state
   ========================================================================== */
.empty-state{
  max-width:1180px; margin:0 auto; padding: 60px 20px; text-align:center;
  color: var(--cream-dim); font-size:15px;
}

/* ==========================================================================
   Footer
   ========================================================================== */
.site-footer{
  border-top:1px solid var(--hairline);
  padding: 24px 20px calc(24px + var(--safe-b));
  max-width:1180px; margin-inline:auto;
  display:flex; align-items:center; justify-content:space-between; gap:12px; flex-wrap:wrap;
  color: var(--cream-dim); font-size:12.5px;
}
.ios-help-link{
  background:none; border:none; color: var(--accent-light); font-size:12.5px; font-weight:600;
  cursor:pointer; padding:4px 0; text-decoration:underline; text-underline-offset:3px;
}

/* ==========================================================================
   iOS install modal
   ========================================================================== */
.modal-backdrop{
  position:fixed; inset:0; background:rgba(4,6,10,.7); backdrop-filter: blur(4px);
  display:flex; align-items:flex-end; justify-content:center; z-index:50;
  padding: 20px 20px calc(20px + var(--safe-b));
}
@media (min-width: 640px){
  .modal-backdrop{ align-items:center; }
}
.modal{
  background: var(--bg-soft); border:1px solid var(--hairline); border-radius: 18px;
  padding:24px; max-width:400px; width:100%;
  box-shadow: var(--shadow-pop);
}
.modal h2{ font-size:18px; font-weight:700; margin-bottom:14px; color: var(--heading); }
.ios-steps{ display:flex; flex-direction:column; gap:10px; font-size:14px; color: var(--cream-dim); }
.ios-steps li{ padding-inline-start:4px; }
.about-text{ font-size:14px; color: var(--cream-dim); line-height:1.65; }
.about-text + .about-text{ margin-top:12px; }
.modal-close{
  margin-top:20px; width:100%; background: var(--accent); color: var(--on-accent); border:none;
  font-weight:700; font-size:14px; padding:12px; border-radius: var(--radius-pill); cursor:pointer;
  transition: background .15s ease;
}
.modal-close:hover{ background: var(--accent-light); }

/* ==========================================================================
   Responsive
   ========================================================================== */
@media (max-width: 480px){
  .topbar-inner{ padding: 10px 16px; }
  .brand-text em{ display:none; }
  .hero{ padding: 38px 16px 22px; }
  .hero--compact{ padding: 20px 16px 14px; }
  .filters{ padding: 6px 16px 20px; gap:8px; }
  .filter-tile{ padding:11px 5px 9px; border-radius:14px; }
  .filter-tile .tile-emoji{ font-size:19px; }
  .filter-tile .tile-label{ font-size:10.5px; }
  .catalog{ padding: 8px 16px 32px; grid-template-columns: 1fr; }
  .hero-stats{ gap:22px; }
  .topbar-actions{ gap:6px; }
  .icon-btn{ padding:8px 10px; }
  .lang-trigger span:not(.chevron){ max-width:56px; overflow:hidden; text-overflow:ellipsis; white-space:nowrap; }
  .lang-menu{ min-width:140px; }
  .install-btn span{ display:none; }
}