/* =========================================================
     THEMES
     Each theme is a full token set. Only these five roles ever
     get referenced anywhere below:
       --app-background  the page itself, outside the elevation system
       --background       elevation level 1 — base surface
       --muted             elevation level 2 — nav + hero sit here
       --accent            elevation level 3 — the most raised surface
       --primary           interactive / brand color
       --foreground        primary text on --background
       --muted-foreground  secondary text on --background
     Plus three "on-*" helpers for legible text on accent and primary.
     ========================================================= */

:root,
[data-theme="violet"]{
  --app-background: #F2F3FC;
  --background:     #FFFFFF;
  --muted:          #E4E0F6;
  --app-muted:      var(--muted);
  --accent:         #D6C9FA;
  --app-accent:     var(--accent);
  --primary:        #4527A0;
  --ink:            #221A3D;
  --app-border:     #C8BFEB;
  --app-foreground:        #221A3D;
  --app-muted-foreground:  #6B648C;
  --on-accent:      #2C1462;
  --on-primary:     #FFFFFF;
  --app-scrollbar-thumb: #ACA8C0;
  --app-scrollbar-track: #FFFFFF;
  --app-secondary: #3F3F46;
  --app-secondary-foreground: #FFFFFF;
}

[data-theme="sage"]{
  --app-background: #F1F5ED;
  --background:     #FFFFFF;
  --muted:          #DEE8D3;
  --app-muted:      var(--muted);
  --accent:         #C2DBAB;
  --app-accent:     var(--accent);
  --primary:        #386641;
  --ink:            #1E2B19;
  --app-border:     #C6D5BA;
  --app-foreground:        #1E2B19;
  --app-muted-foreground:  #6A7A61;
  --on-accent:      #1F3418;
  --on-primary:     #FFFFFF;
  --app-scrollbar-thumb: #A5B09E;
  --app-scrollbar-track: #FFFFFF;
  --app-secondary: #3F3F46;
  --app-secondary-foreground: #FFFFFF;
}

[data-theme="terracotta"]{
  --app-background: #FBF1EA;
  --background:     #FFFFFF;
  --muted:          #F1DBCC;
  --app-muted:      var(--muted);
  --accent:         #E9BA9B;
  --app-accent:     var(--accent);
  --primary:        #B4502A;
  --ink:            #3A2013;
  --app-border:     #E5C6AA;
  --app-foreground:        #3A2013;
  --app-muted-foreground:  #8A6B58;
  --on-accent:      #4A2313;
  --on-primary:     #FFFFFF;
  --app-scrollbar-thumb: #BDA79B;
  --app-scrollbar-track: #FFFFFF;
  --app-secondary: #3F3F46;
  --app-secondary-foreground: #FFFFFF;
}

[data-theme="indigo-night"]{
  --app-background: #0D0F22;
  --background:     #15172E;
  --muted:          #1F2342;
  --app-muted:      var(--muted);
  --accent:         #333866;
  --app-accent:     var(--accent);
  --primary:        #97A6FF;
  --ink:            #E7E8FA;
  --app-border:     #3B4068;
  --app-foreground:        #E7E8FA;
  --app-muted-foreground:  #9AA0C4;
  --on-accent:      #D3D8FF;
  --on-primary:     #161832;
  --app-scrollbar-thumb: #3B4068;
  --app-scrollbar-track: #15172E;
  --app-secondary: #E7E8FA;
  --app-secondary-foreground: #161832;
}

[data-theme="rose"]{
  --app-background: #FBF0F2;
  --background:     #FFFFFF;
  --muted:          #F3DCE1;
  --app-muted:      var(--muted);
  --accent:         #EABBC7;
  --app-accent:     var(--accent);
  --primary:        #9C2B4E;
  --ink:            #3B1420;
  --app-border:     #E9C8D2;
  --app-foreground:        #3B1420;
  --app-muted-foreground:  #84616B;
  --on-accent:      #4A1826;
  --on-primary:     #FFFFFF;
  --app-scrollbar-thumb: #BAA2A8;
  --app-scrollbar-track: #FFFFFF;
  --app-secondary: #3F3F46;
  --app-secondary-foreground: #FFFFFF;
}

[data-theme="ocean"]{
  --app-background: #ECF6F5;
  --background:     #FFFFFF;
  --muted:          #D5E9E7;
  --app-muted:      var(--muted);
  --accent:         #B2DAD5;
  --app-accent:     var(--accent);
  --primary:        #146B67;
  --ink:            #0C2B29;
  --app-border:     #C0DAD6;
  --app-foreground:        #0C2B29;
  --app-muted-foreground:  #5E807B;
  --on-accent:      #0F3B37;
  --on-primary:     #FFFFFF;
  --app-scrollbar-thumb: #9AB4B1;
  --app-scrollbar-track: #FFFFFF;
  --app-secondary: #3F3F46;
  --app-secondary-foreground: #FFFFFF;
}

.tido {
  --background: var(--app-background) !important;
  --foreground: var(--app-foreground) !important;
  --card: var(--background) !important;
  --card-foreground: var(--app-foreground) !important;
  --popover: var(--background) !important;
  --popover-foreground: var(--app-foreground) !important;
  --muted: var(--app-muted) !important;
  --muted-foreground: var(--app-muted-foreground) !important;
  --accent: var(--app-accent) !important;
  --accent-foreground: var(--on-accent) !important;
  --primary-foreground: var(--on-primary) !important;
  --secondary: var(--app-secondary) !important;
  --secondary-foreground: var(--app-secondary-foreground) !important;
  --tido-color-primary: var(--primary) !important;
  --border: var(--app-border) !important;
  --scrollbar-thumb: var(--app-scrollbar-thumb) !important;
  --scrollbar-track: var(--app-background) !important;
}

/* ========================================================= */

*{ box-sizing: border-box; }

html, body{ margin: 0; padding: 0; height: 100%; }

body{
  background: var(--app-background);
  color: var(--ink);
  font-family: 'Inter', system-ui, sans-serif;
  -webkit-font-smoothing: antialiased;
  transition: background .25s ease, color .25s ease;
}

.frame{
  padding: clamp(14px, 2.4vw, 28px);
  height: 100vh;
  display: grid;
  grid-template-rows: auto 1fr;
  gap: 14px;
  overflow: hidden;
}

/* nav and hero intentionally share the same elevation level */
.nav, .hero{
  background: var(--muted);
  transition: background .25s ease;
}

.nav{
  border-radius: 999px;
  height: 64px;
  padding: 0 10px;
  display: flex;
  align-items: center;
  justify-content: flex-end;
  flex-shrink: 0;
}

.hero{
  height: 100%;
  border-radius: 28px;
  min-height: 0;
}

/* ---- theme control cluster: itself sits one level up (level 1) ---- */
.controls{
  display: flex;
  align-items: center;
  gap: 10px;
  background: var(--background);
  border-radius: 999px;
  padding: 6px 8px 6px 14px;
  box-shadow: 0 8px 20px -10px rgba(0,0,0,0.35);
  transition: background .25s ease;
}

.swatches{
  display: flex;
  align-items: center;
  gap: 6px;
}

.swatch{
  width: 14px;
  height: 14px;
  border-radius: 50%;
  border: 1px solid rgba(0,0,0,0.1);
}

.swatch--background{ background: var(--background); }
.swatch--muted{ background: var(--muted); }
.swatch--accent{ background: var(--accent); }

.theme-select{
  appearance: none;
  -webkit-appearance: none;
  border: none;
  background-color: var(--accent);
  color: var(--on-accent);
  font: 600 13px/1 'Inter', sans-serif;
  padding: 9px 32px 9px 14px;
  border-radius: 999px;
  cursor: pointer;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 20 20' fill='none'%3E%3Cpath d='M5 8l5 5 5-5' stroke='%232C1462' stroke-width='1.6' stroke-linecap='round' stroke-linejoin='round'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 10px center;
  background-size: 14px;
  transition: background-color .2s ease;
}

.theme-select:hover{ filter: brightness(0.97); }

:focus-visible{
  outline: 2px solid var(--primary);
  outline-offset: 2px;
}

.visually-hidden{
  position: absolute;
  width: 1px;
  height: 1px;
  margin: -1px;
  padding: 0;
  overflow: hidden;
  clip: rect(0 0 0 0);
  clip-path: inset(50%);
  white-space: nowrap;
  border: 0;
}

/* ---- search ---- */
.search-form{
  display: flex;
  align-items: center;
  gap: 8px;
  margin-right: auto;
  min-width: 0;
}

.search-input{
  border: 1px solid var(--app-border);
  background: var(--background);
  color: var(--ink);
  font: 400 14px/1 'Inter', sans-serif;
  padding: 10px 16px;
  border-radius: 999px;
  width: min(320px, 36vw);
  transition: border-color .2s ease, box-shadow .2s ease, background .25s ease;
}

.search-input::placeholder{ color: var(--app-muted-foreground); opacity: .75; }

.search-input:focus-visible{
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 2px var(--primary);
}

.search-button{
  border: none;
  background: var(--primary);
  color: var(--on-primary);
  font: 600 13px/1 'Inter', sans-serif;
  padding: 11px 18px;
  border-radius: 999px;
  cursor: pointer;
  white-space: nowrap;
  transition: filter .2s ease;
}

.search-button:hover{ filter: brightness(0.92); }

/* ---- search result page ---- */
.page-content{
  background: var(--background);
  border: 1px solid var(--app-border);
  border-radius: 28px;
  padding: clamp(20px, 3vw, 36px) clamp(16px, 3vw, 40px) 40px;
  overflow-y: auto;
  min-height: 0;
  transition: background .25s ease, border-color .25s ease;
}

.search-status{
  margin: 4px 0 18px;
  color: var(--app-muted-foreground);
  font: 500 13px/1.5 'Inter', sans-serif;
}

.search-status--error{ color: var(--ink); font-weight: 600; }

.search-results{
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.result-card{
  background: var(--muted);
  border: 1px solid var(--app-border);
  border-radius: 18px;
  padding: 16px 20px;
  transition: border-color .2s ease;
}

.result-card:hover{ border-color: var(--primary); }

.result-title{
  display: inline-block;
  color: var(--ink);
  font: 600 17px/1.35 'Inter', sans-serif;
  text-decoration: none;
}

.result-title:hover{
  color: var(--primary);
  text-decoration: underline;
}

.result-breadcrumb{
  margin: 4px 0 0;
  color: var(--app-muted-foreground);
  font: 500 12px/1.5 'Inter', sans-serif;
}

.result-kwics{
  margin-top: 12px;
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.kwic{
  display: block;
  color: var(--ink);
  font: 400 14px/1.5 'Inter', sans-serif;
  opacity: .9;
  overflow-wrap: anywhere;
}

.kwic em{
  background: var(--accent);
  color: var(--on-accent);
  font-style: normal;
  font-weight: 600;
  border-radius: 4px;
  padding: 0 3px;
}

.result-author{
  margin: 10px 0 0;
  color: var(--app-muted-foreground);
  font: 400 12px/1.5 'Inter', sans-serif;
}

.search-more-wrap{
  display: flex;
  justify-content: center;
  margin-top: 22px;
}

.load-more{
  border: 1px solid var(--primary);
  background: var(--background);
  color: var(--primary);
  font: 600 13px/1 'Inter', sans-serif;
  padding: 11px 24px;
  border-radius: 999px;
  cursor: pointer;
  transition: background .2s ease, color .2s ease;
}

.load-more:hover{
  background: var(--primary);
  color: var(--on-primary);
}

@media (max-width: 620px){
  .search-input{ width: 130px; }
  .page-content{ padding: 18px 14px 28px; }
}

@media (max-width: 520px){
  .controls{ padding: 6px 6px 6px 10px; gap: 8px; }
  .swatches{ display: none; }
  .search-form{ gap: 6px; }
  .search-button{ padding: 11px 12px; }
}