/* ── VARIABLES & RESET ────────────────────────────────── */
:root {
    --sand:         #FAF7F2;
    --sand-mid:     #F2EBE0;
    --sand-border:  #E4D9C8;
    --cerulean:     #2A4A6B;
    --cerulean-lt:  #6BB8D4;
    --copper:       #B87333;
    --copper-lt:    #D4924A;
    --ink:          #1C1C1A;
    --ink-soft:     #4A4A44;
    --ink-muted:    #888880;
    --radius:       16px;
    --shadow:       0 4px 24px rgba(42, 74, 107, 0.08);
  }
  
  * {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
  }
  
  body {
    background: var(--sand);
    color: var(--ink);
    font-family: 'Segoe UI', system-ui, sans-serif;
    min-height: 100vh;
    padding-bottom: 48px;
  }
  
  /* ── HEADER ───────────────────────────────────────────── */
  header {
    background: var(--cerulean);
    padding: 16px 24px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    position: sticky;
    top: 0;
    z-index: 100;
    box-shadow: 0 2px 12px rgba(0,0,0,0.15);
  }
  
  .logo {
    display: flex;
    flex-direction: column;
    line-height: 1.1;
  }
  
  .logo-main {
    font-size: 22px;
    font-weight: 700;
    color: #fff;
    letter-spacing: -0.5px;
  }
  
  .logo-sub {
    font-size: 10px;
    color: var(--cerulean-lt);
    letter-spacing: 1px;
    text-transform: uppercase;
  }
  
  .lang-toggle {
    background: transparent;
    border: 1.5px solid var(--cerulean-lt);
    color: var(--cerulean-lt);
    border-radius: 8px;
    padding: 6px 14px;
    font-size: 13px;
    font-weight: 600;
    cursor: pointer;
    letter-spacing: 1px;
    transition: all 0.2s;
  }
  
  .lang-toggle:hover {
    background: var(--cerulean-lt);
    color: var(--cerulean);
  }
  
  /* ── MAIN ─────────────────────────────────────────────── */
  main {
    max-width: 1200px;
    margin: 0 auto;
    padding: 24px 20px;
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 20px;
    align-items: start;
  }
  
  /* stack vertically on mobile */
  @media (max-width: 700px) {
    main {
      grid-template-columns: 1fr;
      max-width: 480px;
    }
  }
  
  /* ── CALCULATE BUTTON ─────────────────────────────────── */
  .btn-calculate {
    margin-top: 16px;
    width: 100%;
    padding: 10px;
    background: var(--cerulean);
    color: #fff;
    border: none;
    border-radius: 10px;
    font-size: 15px;
    font-weight: 600;
    cursor: pointer;
    letter-spacing: 0.5px;
    transition: background 0.2s;
  }
  
  .btn-calculate:hover {
    background: var(--cerulean-lt);
    color: var(--cerulean);
  }
  
  /* ── RESULT BOX ───────────────────────────────────────── */
  .calc-result {
    margin-top: 14px;
    min-height: 40px;
    background: var(--sand);
    border-radius: 10px;
    padding: 8px 14px;
    font-size: 26px;
    font-weight: 700;
    color: var(--copper);
    text-align: center;
  }
  
  /* ── TAGLINE ──────────────────────────────────────────── */
.tagline {
    grid-column: 1 / -1;
    text-align: center;
    font-size: 18px;
    font-weight: 600;
    color: var(--cerulean);
    padding: 8px 0 4px;
    letter-spacing: 0.3px;
  }

  /* ── CALCULATOR CARDS ─────────────────────────────────── */
  .calc-card {
    background: var(--sand-mid);
    border: 1px solid var(--sand-border);
    border-radius: var(--radius);
    padding: 20px;
    box-shadow: var(--shadow);
  }
  
  .calc-question {
    font-size: 16px;
    color: var(--ink-soft);
    line-height: 2;
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 8px;
  }
  
  .calc-question input {
    width: 80px;
    padding: 6px 10px;
    border: 1.5px solid var(--cerulean-lt);
    border-radius: 8px;
    background: var(--sand);
    color: var(--ink);
    font-size: 16px;
    font-weight: 600;
    text-align: center;
    outline: none;
    transition: border-color 0.2s;
  }
  
  .calc-question input:focus {
    border-color: var(--cerulean);
  }
  
  /* hide number input arrows */
  .calc-question input::-webkit-outer-spin-button,
  .calc-question input::-webkit-inner-spin-button {
    -webkit-appearance: none;
  }
  
  .calc-result {
    margin-top: 12px;
    font-size: 28px;
    font-weight: 700;
    color: var(--copper);
    min-height: 36px;
  }
  
  .calc-actions {
    margin-top: 10px;
    display: flex;
    gap: 8px;
    min-height: 32px;
  }
  
  .btn-copy, .btn-whatsapp {
    padding: 5px 14px;
    border-radius: 8px;
    font-size: 12px;
    font-weight: 600;
    letter-spacing: 0.5px;
    cursor: pointer;
    border: 1.5px solid;
    transition: all 0.2s;
  }
  
  .btn-copy {
    border-color: var(--cerulean);
    color: var(--cerulean);
    background: transparent;
  }
  
  .btn-copy:hover {
    background: var(--cerulean);
    color: #fff;
  }
  
  .btn-whatsapp {
    border-color: #25D366;
    color: #25D366;
    background: transparent;
  }
  
  .btn-whatsapp:hover {
    background: #25D366;
    color: #fff;
  }
  
  /* ── HISTORY ──────────────────────────────────────────── */
  .history-section {
    max-width: 480px;
    margin: 8px auto 0;
    padding: 0 16px;
  }
  
  .history-title {
    font-size: 13px;
    font-weight: 600;
    color: var(--ink-muted);
    letter-spacing: 1px;
    text-transform: uppercase;
    margin-bottom: 10px;
  }
  
  .history-list {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 6px;
  }
  
  .history-list li {
    background: var(--sand-mid);
    border: 1px solid var(--sand-border);
    border-radius: 10px;
    padding: 10px 14px;
    font-size: 13px;
    color: var(--ink-soft);
    display: flex;
    justify-content: space-between;
  }
  
  .history-list li span {
    color: var(--copper);
    font-weight: 600;
  }

  /* ── HISTORY HEADER ───────────────────────────────────── */
.history-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 10px;
  }
  
  .btn-clear {
    font-size: 11px;
    font-weight: 600;
    padding: 4px 12px;
    border-radius: 8px;
    border: 1.5px solid var(--copper);
    color: var(--copper);
    background: transparent;
    cursor: pointer;
    letter-spacing: 0.5px;
    transition: all 0.2s;
  }
  
  .btn-clear:hover {
    background: var(--copper);
    color: #fff;
  }
  
  /* ── FOOTER ───────────────────────────────────────────── */
  footer {
    text-align: center;
    margin-top: 40px;
    font-size: 12px;
    color: var(--ink-muted);
  }
  
  footer a {
    color: var(--cerulean-lt);
    text-decoration: none;
  }
  
  footer a:hover {
    text-decoration: underline;
  }

  /* ── CARD COLOR VARIANTS ──────────────────────────────── */
#calc1 {
  background: #F2EBE0;
  border-color: #E4D9C8;
}

#calc2 {
  background: #EFF6FA;
  border-color: #C8DDE8;
}

#calc3 {
  background: #FDF6EE;
  border-color: #E8D5BC;
}

/* ── LOGO ALIGNMENT ───────────────────────────────────── */
.logo {
  display: flex;
  flex-direction: row;
  align-items: center;
  gap: 10px;
}