:root {
  /* ── Brand colour (Indigo) ── pass as RGB triplet for rgba() usage */
  --clr-indigo:     99, 102, 241;
  --clr-green:      37, 211, 102;
  --clr-accent:     #bdc8ff;
  --clr-accent-red: #fb0505;

  /* ── Surfaces ── */
  --bg-body:        #0e1117;
  --bg-card:        #161922;
  --bg-menu:        #1c202e;

  /* ── Text ── */
  --text-base:      #d8dae8;
  --text-heading:   #f0f1f8;
  --text-subtitle:  #a8abbe;
  --text-pill:      #bdc8ff;
  --text-label:     #8f96ae;
  --text-trigger:   #c4cadf;
  --text-hover:     #e8eaf4;
  --text-option:    #b8bdd2;
  --text-active:    #cdd5ff;
  --text-email:     #cdd5ff;
  --text-whatsapp:  #9eeabc;
  --icon-stroke:    #b8c4ff;
}
*, *::before, *::after { margin: 0; padding: 0; box-sizing: border-box; }
 
  body {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 24px;
    background-color: var(--bg-body);
    background-image:
      radial-gradient(ellipse 80% 60% at 50% -10%, rgba(var(--clr-indigo),.15) 0%, transparent 65%),
      radial-gradient(ellipse 50% 40% at 80% 110%, rgba(var(--clr-indigo),.08) 0%, transparent 60%);
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', system-ui, sans-serif;
    color: var(--text-base);
    font-size: 1rem;
  }
 
  @media (prefers-reduced-motion: reduce) {
    *, *::before, *::after {
      animation-duration: .01ms !important;
      animation-iteration-count: 1 !important;
      transition-duration: .01ms !important;
    }
  }
 
  :focus-visible {
    outline: 3px solid var(--clr-accent);
    outline-offset: 3px;
    border-radius: 6px;
  }
 
  .card {
    position: relative;
    width: 100%;
    max-width: 520px;
    background: var(--bg-card);
    border: 1px solid rgba(255,255,255,.12);
    border-radius: 20px;
    padding: 52px 48px 48px;
    text-align: center;
    box-shadow: 0 32px 80px rgba(0,0,0,.55);
    animation: fadeUp .5s cubic-bezier(.22,.97,.58,1) both;
  }
 
  @keyframes fadeUp {
    from { opacity: 0; transform: translateY(16px); }
    to   { opacity: 1; transform: translateY(0); }
  }
 
  .icon-wrap {
    width: 60px;
    height: 60px;
    margin: 0 auto 28px;
    border-radius: 16px;
    background: rgba(var(--clr-indigo),.18);
    border: 1px solid rgba(165,180,252,.25);
    display: flex;
    align-items: center;
    justify-content: center;
  }
 
  .icon-wrap svg {
    width: 28px;
    height: 28px;
    stroke: var(--icon-stroke);
    fill: none;
    stroke-width: 1.6;
    stroke-linecap: round;
    stroke-linejoin: round;
  }
 
  .pill {
    display: inline-flex;
    align-items: center;
    gap: 7px;
    font-size: .8125rem; /* 13px */
    font-weight: 500;
    letter-spacing: .04em;
    color: var(--text-pill);
    background: rgba(var(--clr-indigo),.14);
    border: 1px solid rgba(165,180,252,.28);
    border-radius: 99px;
    padding: 5px 14px;
    margin-bottom: 24px;
  }
 
  .pill-dot {
    width: 7px;
    height: 7px;
    border-radius: 50%;
    background: var(--clr-accent-red);
    flex-shrink: 0;
    animation: pulse 2.4s ease-in-out infinite;
  }
 
  @keyframes pulse {
    0%, 100% { opacity: 1; }
    50%       { opacity: .3; }
  }
 
  h1 {
    font-family: Georgia, 'Times New Roman', serif;
    font-size: 2rem;
    font-weight: 400;
    line-height: 1.2;
    color: var(--text-heading);
    margin-bottom: 16px;
    letter-spacing: -.01em;
  }
 
  .subtitle {
    font-size: 1rem; 
    font-weight: 400;
    line-height: 1.7;
    color: var(--text-subtitle);
    margin: 0 auto;
  }
 
  .divider {
    height: 1px;
    background: rgba(255,255,255,.09);
    margin: 32px 0;
  }
 
  .contact-label {
    font-size: .8125rem;
    font-weight: 500;
    letter-spacing: .06em;
    text-transform: uppercase;
    color: var(--text-label);
    margin-bottom: 16px;
  }
 
  .btn-group {
    display: flex;
    gap: 10px;
    justify-content: center;
    flex-wrap: wrap;
  }
 
  .btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    min-height: 44px;      /* WCAG 2.5.5 touch target */
    padding: 10px 22px;
    border-radius: 10px;
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', system-ui, sans-serif;
    font-size: 0.9375rem;  /* 15px */
    font-weight: 500;
    text-decoration: none;
    transition: transform .15s, box-shadow .15s, background .15s;
    cursor: pointer;
  }
 
  .btn:hover  { transform: translateY(-1px); }
  .btn:active { transform: translateY(0); }
 
  .btn-email {
    background: rgba(var(--clr-indigo),.20);
    border: 1px solid rgba(165,180,252,.35);
    color: var(--text-active);
  }
  .btn-email:hover {
    background: rgba(var(--clr-indigo),.30);
    box-shadow: 0 4px 20px rgba(var(--clr-indigo),.22);
  }
 
  .btn-whatsapp {
    background: rgba(var(--clr-green),.13);
    border: 1px solid rgba(var(--clr-green),.28);
    color: var(--text-whatsapp);
  }

  .btn-whatsapp:hover {
    background: rgba(var(--clr-green),.23);
    box-shadow: 0 4px 20px rgba(var(--clr-green),.18);
  }
 
  .btn svg {
    width: 16px;
    height: 16px;
    flex-shrink: 0;
    stroke: currentColor;
    fill: none;
    stroke-width: 1.8;
    stroke-linecap: round;
    stroke-linejoin: round;
  }
 
  .lang-picker {
    position: absolute;
    top: 18px;
    right: 18px;
  }
 
  .lang-trigger {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    min-height: 36px;      /* touch-friendly */
    padding: 6px 10px 6px 9px;
    background: rgba(255,255,255,.07);
    border: 1px solid rgba(255,255,255,.14);
    border-radius: 8px;
    color: var(--text-trigger);
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', system-ui, sans-serif;
    font-size: .875rem;    /* 14px */
    font-weight: 500;
    cursor: pointer;
    transition: background .15s, border-color .15s, color .15s;
    user-select: none;
  }
 
  .lang-trigger:hover {
    background: rgba(255,255,255,.12);
    border-color: rgba(255,255,255,.22);
    color: var(--text-hover);
  }
 
  .lang-trigger svg {
    width: 14px;
    height: 14px;
    stroke: currentColor;
    fill: none;
    stroke-width: 2;
    stroke-linecap: round;
    stroke-linejoin: round;
    transition: transform .2s;
    flex-shrink: 0;
  }
 
  .lang-picker.open .lang-trigger {
    color: var(--text-hover);
    background: rgba(255,255,255,.12);
    border-color: rgba(255,255,255,.22);
  }
  .lang-picker.open .lang-trigger svg.chevron { transform: rotate(180deg); }
 
  .lang-flag {
    width: 18px;
    height: 13px;
    display: block;
    object-fit: cover;
    border-radius: 2px;
    flex-shrink: 0;
  }
 
  .lang-menu {
    position: absolute;
    top: calc(100% + 6px);
    right: 0;
    min-width: 164px;
    background: var(--bg-menu);
    border: 1px solid rgba(255,255,255,.12);
    border-radius: 12px;
    padding: 6px;
    box-shadow: 0 16px 40px rgba(0,0,0,.55);
    opacity: 0;
    transform: translateY(-6px) scale(.97);
    transform-origin: top right;
    pointer-events: none;
    transition: opacity .18s, transform .18s;
    z-index: 100;
  }
 
  .lang-picker.open .lang-menu {
    opacity: 1;
    transform: translateY(0) scale(1);
    pointer-events: all;
  }
 
  .lang-option {
    display: flex;
    align-items: center;
    gap: 10px;
    min-height: 40px;      /* touch target */
    padding: 8px 10px;
    border-radius: 8px;
    font-size: .875rem;
    font-weight: 400;
    color: var(--text-option);
    cursor: pointer;
    transition: background .12s, color .12s;
  }
 
  .lang-option:hover {
    background: rgba(255,255,255,.08);
    color: var(--text-hover);
  }
 
  .lang-option.active {
    background: rgba(var(--clr-indigo),.18);
    color: var(--text-active);
    font-weight: 500;
  }
 
  .lang-option .check {
    margin-left: auto;
    width: 14px;
    height: 14px;
    stroke: var(--clr-accent);
    fill: none;
    stroke-width: 2.2;
    stroke-linecap: round;
    stroke-linejoin: round;
    opacity: 0;
    flex-shrink: 0;
  }
 
  .lang-option.active .check { opacity: 1; }
 
  @media (max-width: 480px) {
    .card { padding: 44px 24px 32px; }
    h1 { font-size: 1.6rem; }
    .btn { width: 100%; }
    .lang-trigger span:not(.lang-flag) { display: none; } /* show flag only on small screens */
  }