/* NLSIR Research Guide: shared tokens for the public guide and the editor.
   Colours are sampled from repository.nls.ac.in/nlsir (banner, link colour, gold rule). See DESIGN.md. */
:root{
  --brand:#0d3751;         /* NLSIR banner background only (the logo image carries this navy) */
  --navy:#000000;          /* headings: black */
  --navy-deep:#000000;
  --blue:#000000;          /* links: black, underlined */
  --blue-hover:#000000;
  --gold:#f1bb56;          /* rule under the repository banner */
  --gold-logo:#c78812;     /* the NLSIR building mark */
  --gold-ink:#000000;      /* numerals: black */
  --ink:#000000;
  --ink-soft:#4a4a4a;
  --page:#ffffff;
  --surface:#ffffff;
  --surface-alt:#f6f6f6;
  --line:#c4c4c4;
  --line-soft:#e4e4e4;
  --tint:#efefef;          /* hover background */
  --danger:#a1281f;
  --ok:#22643a;

  /* Source Sans, as used by OJLS on academic.oup.com. Google Fonts serves it as "Source Sans 3", the current release of Source Sans Pro. */
  --font:'Source Sans 3','Source Sans Pro','Helvetica Neue',Arial,sans-serif;

  /* Plain rectangles throughout (editor's request). Raise these to soften corners. */
  --r-lg:0;
  --r-md:0;
  --r-sm:0;
  --r-pill:0;

  --shadow:none;
  --focus:0 0 0 3px rgba(0,0,0,.35);
}
*{box-sizing:border-box}
html,body{margin:0;padding:0}
body{
  background:var(--page);color:var(--ink);
  font-family:var(--font);font-size:18px;line-height:1.55;
  -webkit-font-smoothing:antialiased;text-rendering:optimizeLegibility;
}
a{color:#000;text-underline-offset:2px}
a:hover{color:#000;text-decoration-thickness:2px}
button,input,select,textarea{font:inherit;color:inherit}
:focus-visible{outline:none;box-shadow:var(--focus);border-radius:var(--r-sm)}
.visually-hidden{position:absolute!important;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}
[hidden]{display:none!important}

/* Banner: echoes the repository header (navy band, NLSIR mark, gold rule) */
.banner{background:var(--brand);color:#fff;border-bottom:4px solid var(--gold)}
.banner-inner{max-width:1120px;margin:0 auto;padding:18px 20px;display:flex;align-items:center;gap:20px}
.banner-logo{display:block;width:96px;height:auto;flex:none;image-rendering:auto}
.banner a{color:#fff}

/* Buttons */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  min-height:42px;padding:8px 18px;border-radius:var(--r-md);
  border:1px solid var(--line);background:var(--surface);color:var(--ink);
  cursor:pointer;text-decoration:none;font-size:.95rem;line-height:1.2;
  transition:background-color .12s ease,border-color .12s ease;
}
.btn:hover{background:var(--surface-alt);border-color:#8a8a8a;color:var(--ink)}
.btn-primary{background:var(--navy);border-color:var(--navy);color:#fff}
.btn-primary:hover{background:#333;border-color:#333;color:#fff}
.btn-danger{color:var(--danger);border-color:#e6c4c1}
.btn-danger:hover{background:#fbf1f0;border-color:var(--danger);color:var(--danger)}
.btn-quiet{border-color:transparent;background:transparent;color:var(--blue)}
.btn-quiet:hover{background:var(--tint);border-color:transparent;color:var(--blue-hover)}
.btn[disabled]{opacity:.55;cursor:not-allowed}

/* Inputs */
.input,select.input,textarea.input{
  width:100%;min-height:44px;padding:9px 13px;
  border:1px solid #9a9a9a;border-radius:var(--r-md);background:#fff;font-size:1rem;
}
.input:focus,select.input:focus,textarea.input:focus{outline:none;border-color:var(--blue);box-shadow:var(--focus)}
#search-input::-webkit-search-cancel-button{-webkit-appearance:none;display:none}
textarea.input{min-height:90px;resize:vertical;line-height:1.45}

/* Keyword tag: small bordered label */
.chip{
  display:inline-flex;align-items:center;gap:4px;
  font-size:.8rem;line-height:1.3;padding:2px 8px;border-radius:var(--r-pill);
  background:#fff;color:var(--blue-hover);border:1px solid var(--line);
}
button.chip{cursor:pointer}
button.chip:hover{border-color:var(--blue);background:var(--tint)}

@media (prefers-reduced-motion:reduce){*{transition:none!important;scroll-behavior:auto!important}}

h1,h2,h3,.banner-title{font-weight:600}