/*
 * Nusantara UI Kit v1.0.0
 * Button & Badge Collection
 * Southeast Asian Minimalism Design System
 *
 * Author: [Your Name]
 * License: Regular/Extended License
 *
 * Usage: Include this CSS file and add classes to your HTML elements.
 * Zero dependencies — works with any framework or plain HTML.
 */

/* ============================================================
   CSS CUSTOM PROPERTIES (Design Tokens)
   ============================================================ */
:root {
  /* Palette — Tanah Nusantara */
  --nusa-cream:        #F5F0E8;
  --nusa-green:        #2D5016;
  --nusa-green-mid:    #3D6B1F;
  --nusa-green-pale:   #E8F0DC;
  --nusa-gold:         #C4882A;
  --nusa-gold-dark:    #B57A22;
  --nusa-gold-pale:    #F5E9D4;
  --nusa-spice:        #8B3A2A;
  --nusa-spice-dark:   #7A3220;
  --nusa-spice-pale:   #F2E0DC;
  --nusa-stone:        #4A4740;
  --nusa-stone-dark:   #3A3830;
  --nusa-stone-pale:   #EDEDEB;
  --nusa-sky:          #1E5874;
  --nusa-sky-dark:     #174A64;
  --nusa-sky-pale:     #E0EDF4;
  --nusa-ink:          #1E1C18;
  --nusa-muted:        #7A7672;
  --nusa-border:       rgba(45, 80, 22, 0.18);

  /* Radius */
  --nusa-radius-xs:    4px;
  --nusa-radius-sm:    6px;
  --nusa-radius:       8px;
  --nusa-radius-md:    10px;
  --nusa-radius-pill:  100px;

  /* Typography */
  --nusa-font:         'DM Sans', 'Inter', system-ui, -apple-system, sans-serif;

  /* Transitions */
  --nusa-ease:         0.18s ease;
}

/* ============================================================
   BASE BUTTON
   ============================================================ */
.nusa-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 7px;
  font-family: var(--nusa-font);
  font-size: 14px;
  font-weight: 500;
  line-height: 1;
  letter-spacing: 0.01em;
  border-radius: var(--nusa-radius);
  padding: 9px 20px;
  border: 1.5px solid transparent;
  cursor: pointer;
  text-decoration: none;
  white-space: nowrap;
  position: relative;
  overflow: hidden;
  transition:
    background-color var(--nusa-ease),
    border-color var(--nusa-ease),
    opacity var(--nusa-ease),
    transform 0.1s ease;
  -webkit-user-select: none;
  user-select: none;
  appearance: none;
  -webkit-appearance: none;
}

/* Batik micro-dot pattern — appears subtly on hover */
.nusa-btn::before {
  content: '';
  position: absolute;
  inset: 0;
  opacity: 0;
  transition: opacity 0.2s ease;
  background-image: radial-gradient(circle, currentColor 1px, transparent 1px);
  background-size: 10px 10px;
  background-position: 2px 2px;
  pointer-events: none;
}
.nusa-btn:hover::before { opacity: 0.06; }
.nusa-btn:active          { transform: scale(0.97); }

/* ============================================================
   BUTTON SIZES
   ============================================================ */
.nusa-btn-xs { font-size: 12px; padding: 5px 12px;  border-radius: var(--nusa-radius-xs); }
.nusa-btn-sm { font-size: 13px; padding: 7px 16px;  border-radius: var(--nusa-radius-sm); }
.nusa-btn-md { font-size: 14px; padding: 9px 20px;  border-radius: var(--nusa-radius); }
.nusa-btn-lg { font-size: 15px; padding: 11px 26px; border-radius: var(--nusa-radius-md); }
.nusa-btn-xl { font-size: 16px; padding: 14px 32px; border-radius: var(--nusa-radius-md); }

/* ============================================================
   BUTTON SHAPES
   ============================================================ */
.nusa-btn-pill   { border-radius: var(--nusa-radius-pill) !important; }
.nusa-btn-square { border-radius: var(--nusa-radius-xs)  !important; }

/* Icon-only button */
.nusa-btn-icon      { padding: 9px; gap: 0; }
.nusa-btn-icon.nusa-btn-xs { padding: 5px; }
.nusa-btn-icon.nusa-btn-sm { padding: 7px; }
.nusa-btn-icon.nusa-btn-lg { padding: 11px; }
.nusa-btn-icon.nusa-btn-xl { padding: 13px; }

/* Full-width */
.nusa-btn-block { display: flex; width: 100%; }

/* ============================================================
   BUTTON STATES
   ============================================================ */
.nusa-btn:disabled,
.nusa-btn[disabled],
.nusa-btn.is-disabled {
  opacity: 0.42;
  cursor: not-allowed;
  pointer-events: none;
}

.nusa-btn.is-loading { pointer-events: none; opacity: 0.75; }

/* ============================================================
   SOLID BUTTON VARIANTS
   ============================================================ */
/* Primary — Hijau Daun */
.nusa-btn-primary {
  background-color: var(--nusa-green);
  color: var(--nusa-cream);
  border-color: var(--nusa-green);
}
.nusa-btn-primary:hover  { background-color: var(--nusa-green-mid); border-color: var(--nusa-green-mid); }
.nusa-btn-primary:focus  { outline: 2px solid var(--nusa-green); outline-offset: 2px; }

/* Gold — Emas Tua */
.nusa-btn-gold {
  background-color: var(--nusa-gold);
  color: #ffffff;
  border-color: var(--nusa-gold);
}
.nusa-btn-gold:hover  { background-color: var(--nusa-gold-dark); border-color: var(--nusa-gold-dark); }
.nusa-btn-gold:focus  { outline: 2px solid var(--nusa-gold); outline-offset: 2px; }

/* Spice — Rempah */
.nusa-btn-spice {
  background-color: var(--nusa-spice);
  color: var(--nusa-cream);
  border-color: var(--nusa-spice);
}
.nusa-btn-spice:hover  { background-color: var(--nusa-spice-dark); border-color: var(--nusa-spice-dark); }
.nusa-btn-spice:focus  { outline: 2px solid var(--nusa-spice); outline-offset: 2px; }

/* Sky — Langit Pantai */
.nusa-btn-sky {
  background-color: var(--nusa-sky);
  color: var(--nusa-cream);
  border-color: var(--nusa-sky);
}
.nusa-btn-sky:hover  { background-color: var(--nusa-sky-dark); border-color: var(--nusa-sky-dark); }
.nusa-btn-sky:focus  { outline: 2px solid var(--nusa-sky); outline-offset: 2px; }

/* Stone — Batu Candi */
.nusa-btn-stone {
  background-color: var(--nusa-stone);
  color: var(--nusa-cream);
  border-color: var(--nusa-stone);
}
.nusa-btn-stone:hover  { background-color: var(--nusa-stone-dark); border-color: var(--nusa-stone-dark); }
.nusa-btn-stone:focus  { outline: 2px solid var(--nusa-stone); outline-offset: 2px; }

/* Ink — Full dark */
.nusa-btn-ink {
  background-color: var(--nusa-ink);
  color: var(--nusa-cream);
  border-color: var(--nusa-ink);
}
.nusa-btn-ink:hover  { background-color: #2E2C28; }
.nusa-btn-ink:focus  { outline: 2px solid var(--nusa-ink); outline-offset: 2px; }

/* ============================================================
   OUTLINE BUTTON VARIANTS
   ============================================================ */
.nusa-btn-outline-primary {
  background-color: transparent;
  color: var(--nusa-green);
  border-color: var(--nusa-green);
}
.nusa-btn-outline-primary:hover { background-color: var(--nusa-green-pale); }

.nusa-btn-outline-gold {
  background-color: transparent;
  color: var(--nusa-gold);
  border-color: var(--nusa-gold);
}
.nusa-btn-outline-gold:hover { background-color: var(--nusa-gold-pale); }

.nusa-btn-outline-spice {
  background-color: transparent;
  color: var(--nusa-spice);
  border-color: var(--nusa-spice);
}
.nusa-btn-outline-spice:hover { background-color: var(--nusa-spice-pale); }

.nusa-btn-outline-sky {
  background-color: transparent;
  color: var(--nusa-sky);
  border-color: var(--nusa-sky);
}
.nusa-btn-outline-sky:hover { background-color: var(--nusa-sky-pale); }

.nusa-btn-outline-stone {
  background-color: transparent;
  color: var(--nusa-stone);
  border-color: #C0BDB8;
}
.nusa-btn-outline-stone:hover { background-color: var(--nusa-stone-pale); }

/* ============================================================
   SOFT FILL BUTTON VARIANTS (low visual weight)
   ============================================================ */
.nusa-btn-soft-primary {
  background-color: var(--nusa-green-pale);
  color: #205010;
  border-color: transparent;
}
.nusa-btn-soft-primary:hover { background-color: #D5E8C0; }

.nusa-btn-soft-gold {
  background-color: var(--nusa-gold-pale);
  color: #7A5010;
  border-color: transparent;
}
.nusa-btn-soft-gold:hover { background-color: #EDD8B0; }

.nusa-btn-soft-spice {
  background-color: var(--nusa-spice-pale);
  color: var(--nusa-spice);
  border-color: transparent;
}
.nusa-btn-soft-spice:hover { background-color: #E8C8C2; }

.nusa-btn-soft-sky {
  background-color: var(--nusa-sky-pale);
  color: var(--nusa-sky);
  border-color: transparent;
}
.nusa-btn-soft-sky:hover { background-color: #C8DDE8; }

.nusa-btn-soft-stone {
  background-color: var(--nusa-stone-pale);
  color: var(--nusa-stone);
  border-color: transparent;
}
.nusa-btn-soft-stone:hover { background-color: #E0DED8; }

/* ============================================================
   GHOST BUTTON VARIANTS
   ============================================================ */
.nusa-btn-ghost {
  background-color: transparent;
  color: var(--nusa-stone);
  border-color: transparent;
}
.nusa-btn-ghost:hover { background-color: var(--nusa-stone-pale); }

.nusa-btn-ghost-primary {
  background-color: transparent;
  color: var(--nusa-green);
  border-color: transparent;
}
.nusa-btn-ghost-primary:hover { background-color: var(--nusa-green-pale); }

.nusa-btn-ghost-gold {
  background-color: transparent;
  color: var(--nusa-gold);
  border-color: transparent;
}
.nusa-btn-ghost-gold:hover { background-color: var(--nusa-gold-pale); }

/* ============================================================
   BUTTON GROUP
   ============================================================ */
.nusa-btn-group {
  display: inline-flex;
  border: 1.5px solid var(--nusa-border);
  border-radius: var(--nusa-radius);
  overflow: hidden;
}
.nusa-btn-group.nusa-btn-pill { border-radius: var(--nusa-radius-pill); }

.nusa-btn-group .nusa-btn {
  border-radius: 0;
  border: none;
  border-right: 1px solid var(--nusa-border);
}
.nusa-btn-group .nusa-btn:last-child { border-right: none; }
.nusa-btn-group .nusa-btn.is-active  {
  background-color: var(--nusa-green-pale);
  color: var(--nusa-green);
  font-weight: 600;
}

/* ============================================================
   LOADING SPINNER
   ============================================================ */
.nusa-spinner {
  width: 14px;
  height: 14px;
  border: 2px solid rgba(255, 255, 255, 0.35);
  border-top-color: currentColor;
  border-radius: 50%;
  flex-shrink: 0;
  animation: nusa-spin 0.7s linear infinite;
}
@keyframes nusa-spin {
  to { transform: rotate(360deg); }
}

/* ============================================================
   BADGES
   ============================================================ */
.nusa-badge {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  font-family: var(--nusa-font);
  font-size: 12px;
  font-weight: 500;
  line-height: 1.4;
  letter-spacing: 0.01em;
  padding: 3px 10px;
  border-radius: var(--nusa-radius-pill);
  white-space: nowrap;
}

/* Badge with dot indicator */
.nusa-badge.has-dot::before {
  content: '';
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background-color: currentColor;
  flex-shrink: 0;
}

/* Badge shapes */
.nusa-badge-square { border-radius: 5px !important; }
.nusa-badge-pill   { border-radius: var(--nusa-radius-pill) !important; }

/* Badge sizes */
.nusa-badge-sm { font-size: 11px; padding: 2px 8px; }
.nusa-badge-lg { font-size: 13px; padding: 4px 12px; }

/* --- Soft fill badge variants --- */
.nusa-badge-primary { background-color: var(--nusa-green-pale); color: #205010; }
.nusa-badge-gold    { background-color: var(--nusa-gold-pale);  color: #7A5010; }
.nusa-badge-spice   { background-color: var(--nusa-spice-pale); color: var(--nusa-spice); }
.nusa-badge-sky     { background-color: var(--nusa-sky-pale);   color: #155070; }
.nusa-badge-stone   { background-color: var(--nusa-stone-pale); color: var(--nusa-stone); }
.nusa-badge-ink     { background-color: var(--nusa-ink);        color: var(--nusa-cream); }

/* --- Outlined badge variants --- */
.nusa-badge-outline-primary { background-color: transparent; color: var(--nusa-green); border: 1px solid var(--nusa-green); }
.nusa-badge-outline-gold    { background-color: transparent; color: #8A5C10;           border: 1px solid var(--nusa-gold);  }
.nusa-badge-outline-spice   { background-color: transparent; color: var(--nusa-spice); border: 1px solid var(--nusa-spice); }
.nusa-badge-outline-sky     { background-color: transparent; color: var(--nusa-sky);   border: 1px solid var(--nusa-sky);   }
.nusa-badge-outline-stone   { background-color: transparent; color: var(--nusa-stone); border: 1px solid #C0BDB8;           }

/* ============================================================
   COUNT / NOTIFICATION BADGE
   ============================================================ */
.nusa-badge-count {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 20px;
  height: 20px;
  padding: 0 6px;
  border-radius: var(--nusa-radius-pill);
  font-family: var(--nusa-font);
  font-size: 11px;
  font-weight: 600;
  line-height: 1;
}

/* Position helper for button+badge combo */
.nusa-badge-wrapper { position: relative; display: inline-flex; }
.nusa-badge-wrapper .nusa-badge-count {
  position: absolute;
  top: -7px;
  right: -7px;
  z-index: 1;
}

/* ============================================================
   STATUS CHIPS
   ============================================================ */
.nusa-chip {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-family: var(--nusa-font);
  font-size: 12px;
  font-weight: 500;
  padding: 4px 12px 4px 8px;
  border-radius: var(--nusa-radius-pill);
}

.nusa-chip-pulse {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  flex-shrink: 0;
}

.nusa-chip-pulse.is-animated {
  animation: nusa-pulse 1.8s ease-in-out infinite;
}

@keyframes nusa-pulse {
  0%, 100% { opacity: 1; }
  50%       { opacity: 0.4; }
}

/* Chip variants */
.nusa-chip-active  { background-color: var(--nusa-green-pale); color: #205010; }
.nusa-chip-active  .nusa-chip-pulse { background-color: var(--nusa-green); }

.nusa-chip-pending { background-color: var(--nusa-gold-pale);  color: #7A5010; }
.nusa-chip-pending .nusa-chip-pulse { background-color: var(--nusa-gold); }

.nusa-chip-error   { background-color: var(--nusa-spice-pale); color: var(--nusa-spice); }
.nusa-chip-error   .nusa-chip-pulse { background-color: var(--nusa-spice); }

.nusa-chip-info    { background-color: var(--nusa-sky-pale);   color: var(--nusa-sky); }
.nusa-chip-info    .nusa-chip-pulse { background-color: var(--nusa-sky); }

.nusa-chip-idle    { background-color: var(--nusa-stone-pale); color: var(--nusa-stone); }
.nusa-chip-idle    .nusa-chip-pulse { background-color: #A0A0A0; }

/* ============================================================
   DARK MODE SUPPORT
   ============================================================ */
@media (prefers-color-scheme: dark) {
  :root {
    --nusa-cream:       #E8E2D6;
    --nusa-green:       #5A9E30;
    --nusa-green-mid:   #6BBF38;
    --nusa-green-pale:  #1C2E10;
    --nusa-gold:        #D9A040;
    --nusa-gold-dark:   #C48D2A;
    --nusa-gold-pale:   #2E2010;
    --nusa-spice:       #C46050;
    --nusa-spice-dark:  #A84838;
    --nusa-spice-pale:  #2A1410;
    --nusa-stone:       #C0BCB8;
    --nusa-stone-dark:  #A8A4A0;
    --nusa-stone-pale:  #28261E;
    --nusa-sky:         #4A9EC4;
    --nusa-sky-dark:    #3A88AE;
    --nusa-sky-pale:    #0E1E2A;
    --nusa-ink:         #F0EAE0;
    --nusa-muted:       #9A9690;
    --nusa-border:      rgba(200, 210, 180, 0.15);
  }
}