/* ==========================================================================
   Bharat Pincode — "The Postal Register" design system
   ========================================================================== */

:root{
  --paper:      #ECE6D6;
  --paper-2:    #E4DCC7;
  --ink-navy:   #1B2E44;
  --ink-navy-2: #142234;
  --postmark:   #A63A2E;
  --postmark-2: #8C2F25;
  --seal:       #C98A2C;
  --seal-2:     #A8721F;
  --rule:       #B7AD92;
  --charcoal:   #2B2620;
  --charcoal-60:#2B262099;
  --paper-white:#F7F4EA;
  --green-office: #4B6B3F;

  --font-display: 'Zilla Slab', Georgia, serif;
  --font-body: 'IBM Plex Sans', -apple-system, Segoe UI, sans-serif;
  --font-mono: 'IBM Plex Mono', 'Courier New', monospace;

  --radius-sm: 3px;
  --radius-md: 5px;
  --shadow-card: 0 1px 0 var(--rule), 0 8px 20px -14px rgba(27,46,68,.35);
}

*,*::before,*::after{ box-sizing:border-box; }
html{ scroll-behavior:smooth; }

body{
  margin:0;
  background-color: var(--paper);
  background-image:
    linear-gradient(var(--paper-2) 1px, transparent 1px),
    linear-gradient(90deg, var(--paper-2) 1px, transparent 1px);
  background-size: 100% 34px, 34px 100%;
  background-attachment: local;
  color: var(--charcoal);
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

img{ max-width:100%; display:block; }
a{ color: inherit; }

h1,h2,h3,h4{
  font-family: var(--font-display);
  color: var(--ink-navy);
  margin: 0 0 .5em;
  line-height: 1.15;
  letter-spacing: -.01em;
}
h1{ font-size: clamp(2.1rem, 4.5vw, 3.4rem); font-weight:700; }
h2{ font-size: clamp(1.5rem, 3vw, 2.1rem); font-weight:700; }
h3{ font-size: 1.2rem; font-weight:600; }
p{ margin:0 0 1em; }

.container{
  max-width: 1120px;
  margin: 0 auto;
  padding: 0 24px;
}

/* focus visibility */
a:focus-visible, button:focus-visible, input:focus-visible{
  outline: 2px solid var(--postmark);
  outline-offset: 2px;
}

/* --------------------------------------------------------------------
   Eyebrow / register-label
   -------------------------------------------------------------------- */
.eyebrow{
  display:inline-flex;
  align-items:center;
  gap:.5em;
  font-family: var(--font-mono);
  font-size: .72rem;
  letter-spacing: .14em;
  text-transform: uppercase;
  color: var(--postmark);
  font-weight:600;
}
.eyebrow::before{
  content:"";
  width:7px; height:7px;
  border-radius:50%;
  background: var(--postmark);
  display:inline-block;
}

/* --------------------------------------------------------------------
   Header
   -------------------------------------------------------------------- */
.site-header{
  position: sticky; top:0; z-index: 40;
  background: var(--paper-white);
  border-bottom: 1px solid var(--rule);
}
.site-header .container{
  display:flex; align-items:center; justify-content:space-between;
  height: 72px;
}
.brand{
  display:flex; align-items:center; gap:12px;
  font-family: var(--font-display);
  font-weight:700; font-size:1.25rem;
  color: var(--ink-navy);
  text-decoration:none;
}
.brand img{ height:40px; width:40px; }
.brand .brand-sub{
  display:block;
  font-family: var(--font-mono);
  font-size:.62rem;
  letter-spacing:.12em;
  color: var(--charcoal-60);
  font-weight:500;
  text-transform:uppercase;
}
.main-nav{ display:flex; align-items:center; gap: 28px; }
.main-nav a{
  font-size:.95rem; font-weight:600; text-decoration:none;
  color: var(--ink-navy);
  padding-bottom:4px;
  border-bottom: 2px solid transparent;
  transition: border-color .15s ease, color .15s ease;
}
.main-nav a:hover, .main-nav a.active{ border-color: var(--postmark); }
.nav-toggle{
  display:none;
  background:none; border:1px solid var(--rule); border-radius: var(--radius-sm);
  width:42px; height:38px; cursor:pointer;
  align-items:center; justify-content:center;
}
.nav-toggle span, .nav-toggle span::before, .nav-toggle span::after{
  content:""; display:block; width:20px; height:2px; background: var(--ink-navy);
  position:relative; transition: transform .2s ease;
}
.nav-toggle span::before{ position:absolute; top:-6px; }
.nav-toggle span::after{ position:absolute; top:6px; }

@media (max-width: 780px){
  .main-nav{
    position:absolute; top:72px; left:0; right:0;
    background: var(--paper-white);
    border-bottom: 1px solid var(--rule);
    flex-direction:column; align-items:flex-start;
    padding: 8px 24px 20px;
    gap: 14px;
    display:none;
  }
  .main-nav.open{ display:flex; }
  .nav-toggle{ display:inline-flex; }
}

/* --------------------------------------------------------------------
   Buttons / badges
   -------------------------------------------------------------------- */
.btn{
  display:inline-flex; align-items:center; justify-content:center; gap:8px;
  font-family: var(--font-body); font-weight:600; font-size:.95rem;
  padding: 12px 22px;
  border-radius: var(--radius-sm);
  border: 1px solid transparent;
  cursor:pointer;
  text-decoration:none;
  transition: transform .12s ease, background-color .15s ease;
}
.btn:active{ transform: translateY(1px); }
.btn-stamp{
  background: var(--postmark); color: var(--paper-white);
  box-shadow: 0 3px 0 var(--postmark-2);
}
.btn-stamp:hover{ background: var(--postmark-2); }
.btn-ghost{
  background: transparent; border-color: var(--ink-navy); color: var(--ink-navy);
}
.btn-ghost:hover{ background: var(--ink-navy); color: var(--paper-white); }

.badge{
  display:inline-block;
  font-family: var(--font-mono);
  font-size:.68rem; font-weight:600; letter-spacing:.04em;
  padding: 3px 8px;
  border-radius: 999px;
  border: 1px solid currentColor;
  white-space:nowrap;
}
.badge-HO{ color:#7A1F17; background:#F2DCD8; }
.badge-SO{ color:var(--seal-2); background:#F5E7CE; }
.badge-BO{ color:var(--green-office); background:#E4EBDE; }
.badge-GPO{ color:var(--ink-navy); background:#DCE2EA; }
.badge-EXT{ color:#5B4B8A; background:#E4DEF2; }
.badge-OTHER{ color:#555; background:#E7E4DA; }

/* --------------------------------------------------------------------
   Hero / search slip
   -------------------------------------------------------------------- */
.hero{
  padding: 56px 0 20px;
}
.hero-grid{
  display:grid;
  grid-template-columns: 1fr;
  gap: 40px;
  align-items:start;
  transition: grid-template-columns .15s ease;
}
.hero-grid.has-decoder{
  grid-template-columns: 1.1fr .9fr;
}
.hero-intro{ max-width: 640px; }
@media (max-width: 900px){
  .hero-grid, .hero-grid.has-decoder{ grid-template-columns: 1fr; }
  .hero-intro{ max-width: none; }
}

.hero h1{ margin-top:.3em; }
.hero-lede{ font-size:1.08rem; max-width: 46ch; color: var(--charcoal); }

.slip{
  background: var(--paper-white);
  border: 1px solid var(--rule);
  border-radius: var(--radius-md);
  padding: 22px;
  box-shadow: var(--shadow-card);
  position:relative;
}
.slip::after{
  content:"";
  position:absolute; left:22px; right:22px; bottom:-1px;
  border-bottom: 2px dashed var(--rule);
}
.slip-label{
  font-family: var(--font-mono);
  font-size:.68rem; letter-spacing:.1em; text-transform:uppercase;
  color: var(--charcoal-60); margin-bottom:10px; display:block;
}
.search-row{
  display:flex; gap:10px;
}
.search-row input[type="text"]{
  flex:1;
  font-family: var(--font-mono);
  font-size:1.05rem;
  padding: 14px 16px;
  border: 1.5px solid var(--ink-navy);
  border-radius: var(--radius-sm);
  background: #fff;
  color: var(--charcoal);
}
.search-row input[type="text"]:focus{ outline:none; border-color: var(--postmark); }
.search-meta{
  display:flex; flex-wrap:wrap; gap:8px; margin-top:14px;
}
.chip{
  font-size:.8rem; font-family: var(--font-mono);
  padding: 5px 10px; border-radius: 999px;
  background: var(--paper); border:1px solid var(--rule);
  cursor:pointer; color: var(--charcoal);
}
.chip:hover{ border-color: var(--postmark); color: var(--postmark); }

/* --------------------------------------------------------------------
   Decoder
   -------------------------------------------------------------------- */
.decoder{
  margin-top: 20px;
  padding: 20px;
  border: 1px solid var(--rule);
  border-radius: var(--radius-md);
  background: var(--paper-white);
}
.decoder-digits{
  display:flex; gap:6px; justify-content:center; margin-bottom:14px;
}
.decoder-digits .cell{
  width: 15%;
  aspect-ratio: 1/1;
  max-width: 58px;
  display:flex; align-items:center; justify-content:center;
  font-family: var(--font-display);
  font-size: 1.6rem; font-weight:700;
  background: var(--paper);
  border: 2px solid var(--rule);
  border-radius: var(--radius-sm);
  color: var(--charcoal-60);
  transition: transform .18s cubic-bezier(.3,1.6,.5,1), border-color .18s ease, color .18s ease, background .18s ease;
}
.decoder-digits .cell.filled{
  border-color: var(--postmark);
  color: var(--postmark);
  background: #fff;
}
.decoder-digits .cell.stamp{
  animation: stampDown .32s ease;
}
@keyframes stampDown{
  0%{ transform: scale(1.35) rotate(-3deg); opacity:.4; }
  60%{ transform: scale(.94) rotate(1deg); }
  100%{ transform: scale(1) rotate(0); }
}
@media (prefers-reduced-motion: reduce){
  .decoder-digits .cell.stamp{ animation:none; }
}
.decoder-labels{
  display:flex; gap:6px; justify-content:center; margin-bottom:16px;
}
.decoder-labels .lbl{
  width:15%; max-width:58px;
  text-align:center;
  font-family: var(--font-mono);
  font-size:.58rem; letter-spacing:.02em;
  color: var(--charcoal-60);
  text-transform:uppercase;
}
.decoder-readout{
  border-top: 1px dashed var(--rule);
  padding-top: 14px;
  font-size:.95rem;
  color: var(--charcoal);
  min-height: 1.6em;
}
.decoder-readout strong{ color: var(--ink-navy); }
.decoder-readout .placeholder{ color: var(--charcoal-60); font-style:italic; }

/* --------------------------------------------------------------------
   Results register (table)
   -------------------------------------------------------------------- */
.results-wrap{
  margin-top: 26px;
}
.results-count{
  font-family: var(--font-mono);
  font-size:.85rem;
  color: var(--charcoal-60);
  margin-bottom: 10px;
}
.results-count strong{ color: var(--postmark); }
.register{
  width:100%;
  border-collapse: collapse;
  background: var(--paper-white);
  border: 1px solid var(--rule);
  border-radius: var(--radius-md);
  overflow:hidden;
}
.register thead th{
  text-align:left;
  font-family: var(--font-mono);
  font-size:.72rem; letter-spacing:.08em; text-transform:uppercase;
  color: var(--paper-white);
  background: var(--ink-navy);
  padding: 12px 14px;
}
.register tbody td{
  padding: 12px 14px;
  border-top: 1px solid var(--rule);
  font-size:.92rem;
  vertical-align:top;
}
.register tbody tr:nth-child(even){ background: var(--paper); }
.register tbody tr:hover{ background: #F5EFDC; }
.register td.pin-col{ font-family: var(--font-mono); font-weight:600; color: var(--ink-navy); white-space:nowrap; }
.register-scroll{ overflow-x:auto; border-radius: var(--radius-md); }
.empty-state{
  text-align:center; padding: 40px 20px; color: var(--charcoal-60);
  border: 1px dashed var(--rule); border-radius: var(--radius-md);
  background: var(--paper-white);
}

/* --------------------------------------------------------------------
   Sections / cards
   -------------------------------------------------------------------- */
section.block{ padding: 56px 0; }
section.block.alt{ background: var(--paper-2); }
.block-head{ max-width: 62ch; margin-bottom: 34px; }
.block-head p{ color: var(--charcoal); }

.grid-3{ display:grid; grid-template-columns: repeat(3, 1fr); gap: 22px; }
.grid-2{ display:grid; grid-template-columns: repeat(2, 1fr); gap: 22px; }
@media (max-width: 900px){ .grid-3{ grid-template-columns: 1fr 1fr; } }
@media (max-width: 640px){ .grid-3, .grid-2{ grid-template-columns: 1fr; } }

.seal-card{
  background: var(--paper-white);
  border: 1px solid var(--rule);
  border-radius: var(--radius-md);
  padding: 24px;
  box-shadow: var(--shadow-card);
}
.seal-card .seal-badge{
  width:44px; height:44px; border-radius:50%;
  border: 2px solid var(--seal);
  color: var(--seal-2);
  display:flex; align-items:center; justify-content:center;
  font-family: var(--font-mono); font-weight:700; margin-bottom:14px;
}
.seal-card h3{ margin-bottom:.4em; }
.seal-card p{ color: var(--charcoal); font-size:.94rem; margin-bottom:0; }

.steps{ counter-reset: step; display:flex; flex-direction:column; gap:0; }
.step{
  counter-increment: step;
  display:grid; grid-template-columns: 56px 1fr; gap:18px;
  padding: 22px 0;
  border-top: 1px solid var(--rule);
}
.step:last-child{ border-bottom: 1px solid var(--rule); }
.step::before{
  content: counter(step, decimal-leading-zero);
  font-family: var(--font-mono); font-weight:700; font-size:1.1rem;
  color: var(--postmark);
}
.step h3{ margin-bottom:.3em; }
.step p{ color: var(--charcoal); margin-bottom:0; font-size:.94rem; }

.tips-list{ list-style:none; margin:0; padding:0; display:flex; flex-direction:column; gap:14px; }
.tips-list li{
  padding-left: 28px; position:relative; color: var(--charcoal);
}
.tips-list li::before{
  content:"✓"; position:absolute; left:0; top:0;
  color: var(--green-office); font-weight:700;
}

.notice{
  border: 1px dashed var(--rule);
  border-radius: var(--radius-md);
  padding: 18px 20px;
  background: var(--paper-white);
  font-size:.88rem; color: var(--charcoal-60);
  display:flex; gap:12px; align-items:flex-start;
}
.notice .stamp-mark{
  flex-shrink:0;
  width:34px; height:34px; border-radius:50%;
  border:2px solid var(--postmark); color:var(--postmark);
  display:flex; align-items:center; justify-content:center;
  font-family: var(--font-mono); font-weight:700; font-size:.7rem;
  transform: rotate(-8deg);
}

/* --------------------------------------------------------------------
   Footer
   -------------------------------------------------------------------- */
.site-footer{
  border-top: 1px solid var(--rule);
  background: var(--ink-navy);
  color: #C9D0DA;
  padding: 44px 0 26px;
}
.site-footer a{ color:#DCE2EA; text-decoration:none; }
.site-footer a:hover{ color:#fff; text-decoration:underline; }
.footer-grid{
  display:grid; grid-template-columns: 1.4fr 1fr 1fr 1fr; gap: 28px;
  padding-bottom: 26px; border-bottom: 1px solid #2E4160;
}
@media (max-width: 780px){ .footer-grid{ grid-template-columns: 1fr 1fr; } }
.footer-grid h4{
  font-family: var(--font-mono); font-size:.72rem; letter-spacing:.1em; text-transform:uppercase;
  color: #8EA0B8; margin-bottom: 14px;
}
.footer-grid ul{ list-style:none; margin:0; padding:0; display:flex; flex-direction:column; gap:9px; font-size:.9rem; }
.footer-brand{ display:flex; align-items:center; gap:10px; font-family: var(--font-display); font-weight:700; color:#fff; margin-bottom:10px; }
.footer-brand img{ height:34px; width:34px; }
.footer-bottom{
  display:flex; justify-content:space-between; align-items:center; flex-wrap:wrap; gap:10px;
  padding-top: 20px; font-size:.8rem; color:#8EA0B8;
}

/* --------------------------------------------------------------------
   Page header (inner pages)
   -------------------------------------------------------------------- */
.page-hero{
  padding: 46px 0 34px;
  border-bottom: 1px solid var(--rule);
}
.page-hero .eyebrow{ margin-bottom:10px; }
.page-hero p{ max-width: 62ch; font-size:1.05rem; }
.prose{ max-width: 72ch; }
.prose h2{ margin-top: 1.4em; }
.prose ul{ padding-left: 1.2em; }
.prose li{ margin-bottom:.5em; }

/* --------------------------------------------------------------------
   Blog
   -------------------------------------------------------------------- */
.post-card{
  background: var(--paper-white);
  border: 1px solid var(--rule);
  border-radius: var(--radius-md);
  overflow:hidden;
  box-shadow: var(--shadow-card);
  display:flex; flex-direction:column;
  transition: transform .15s ease;
}
.post-card:hover{ transform: translateY(-3px); }
.post-card .thumb{ aspect-ratio: 16/10; background: var(--paper-2); border-bottom:1px solid var(--rule); }
.post-card .thumb svg{ width:100%; height:100%; display:block; }
.post-card .content{ padding: 18px 20px 22px; display:flex; flex-direction:column; flex:1; }
.post-card .datestamp{
  font-family: var(--font-mono); font-size:.68rem; letter-spacing:.08em; text-transform:uppercase;
  color: var(--postmark); margin-bottom:8px;
}
.post-card h3{ margin-bottom:.5em; }
.post-card p{ color: var(--charcoal); font-size:.9rem; flex:1; }
.post-card .read-more{ font-size:.85rem; font-weight:700; color: var(--ink-navy); text-decoration:none; }
.post-card .read-more:hover{ text-decoration:underline; }
.blog-grid{ display:grid; grid-template-columns: repeat(3,1fr); gap: 24px; }
@media (max-width: 900px){ .blog-grid{ grid-template-columns: 1fr 1fr; } }
@media (max-width: 640px){ .blog-grid{ grid-template-columns: 1fr; } }

.post-hero{
  width:100%; aspect-ratio: 21/9; border-radius: var(--radius-md);
  overflow:hidden; border:1px solid var(--rule); margin-bottom: 28px;
  background: var(--paper-2);
}
.post-hero svg{ width:100%; height:100%; display:block; }
.post-meta{ display:flex; gap:16px; flex-wrap:wrap; align-items:center; margin-bottom: 18px; }
.post-meta .datestamp{ font-family: var(--font-mono); font-size:.75rem; color: var(--postmark); font-weight:600; }
.post-meta .datestamp.updated{ color: var(--seal-2); }
.post-meta .readtime{ font-family: var(--font-mono); font-size:.75rem; color: var(--charcoal-60); }
.related{ margin-top: 50px; padding-top: 34px; border-top: 1px solid var(--rule); }

/* contact form */
.form-row{ margin-bottom: 18px; display:flex; flex-direction:column; gap:6px; }
.form-row label{ font-size:.85rem; font-weight:600; color: var(--ink-navy); }
.form-row input, .form-row textarea, .form-row select{
  font-family: var(--font-body); font-size:.95rem;
  padding: 11px 13px; border:1.5px solid var(--rule); border-radius: var(--radius-sm);
  background:#fff; color: var(--charcoal);
}
.form-row input:focus, .form-row textarea:focus, .form-row select:focus{ outline:none; border-color: var(--postmark); }
.contact-grid{ display:grid; grid-template-columns: 1.1fr .9fr; gap: 40px; }
@media (max-width: 860px){ .contact-grid{ grid-template-columns: 1fr; } }
.info-card{ background: var(--paper-white); border:1px solid var(--rule); border-radius: var(--radius-md); padding: 24px; }
.info-card + .info-card{ margin-top:16px; }

/* utility */
.text-center{ text-align:center; }
.mt-0{ margin-top:0; }
.hidden{ display:none !important; }