/* =========================================================================
   Creddo VAT Calculator FI — front-end styles
   -------------------------------------------------------------------------
   Brand palette (locked by spec):
     --cvf-yellow      : #FFCE00   header background
     --cvf-dark-blue   : #004A6E   primary text / accents
     --cvf-light-blue  : #5CC4C4   accent / focus rings
     --cvf-grey-1      : rgb(250,250,250)  surface background
     --cvf-grey-2      : rgb(233,233,233)  unselected button background
     --cvf-blue-btn    : rgb(43,125,246)   button blue, also "selected" state
   Font: Lato.
   -------------------------------------------------------------------------
   IMPORTANT button rules (spec):
     - SELECTED state    : background = rgb(43,125,246) blue, text = white
     - NON-SELECTED state: background = light grey rgb(233,233,233), text = white
     - Reset button uses the NON-SELECTED visual style
   Text must always remain readable; we never let text colour match background.
   ========================================================================= */

:root {
    --cvf-yellow:     #FFCE00;
    --cvf-dark-blue:  #004A6E;
    --cvf-light-blue: #5CC4C4;
    --cvf-grey-1:     rgb(250, 250, 250);
    --cvf-grey-2:     rgb(233, 233, 233);
    --cvf-blue-btn:   rgb(43, 125, 246);
    --cvf-text:       #1a1a1a;
    --cvf-radius:     10px;
    --cvf-shadow:     0 6px 24px rgba(0, 74, 110, 0.08);
}

.creddo-vat-fi,
.creddo-vat-fi * {
    box-sizing: border-box;
    font-family: 'Lato', system-ui, -apple-system, Segoe UI, Roboto, sans-serif;
}

.creddo-vat-fi {
    max-width: 720px;
    margin: 24px auto;
    background: #fff;
    border-radius: var(--cvf-radius);
    box-shadow: var(--cvf-shadow);
    overflow: hidden;
    color: var(--cvf-text);
}

.cvf-header {
    background: var(--cvf-yellow);
    padding: 22px 24px;
}
.cvf-title {
    margin: 0;
    color: var(--cvf-dark-blue);
    font-weight: 900;
    font-size: 22px;
    letter-spacing: -0.01em;
}
.cvf-subtitle {
    margin: 4px 0 0;
    color: var(--cvf-dark-blue);
    font-size: 14px;
    opacity: 0.85;
}

.cvf-body { padding: 22px 24px 26px; background: var(--cvf-grey-1); }

/* ---- Form fields -------------------------------------------------------- */
.cvf-field { margin: 0 0 16px; border: 0; padding: 0; }
.cvf-label {
    display: block;
    font-weight: 700;
    color: var(--cvf-dark-blue);
    font-size: 14px;
    margin-bottom: 6px;
}
.cvf-hint { display: block; margin-top: 6px; font-size: 12px; color: #666; }

.cvf-input {
    width: 100%;
    padding: 11px 12px;
    border: 1px solid #d6d6d6;
    background: #fff;
    border-radius: 8px;
    font-size: 15px;
    color: var(--cvf-text);
    transition: border-color .15s, box-shadow .15s;
}
.cvf-input:focus {
    outline: none;
    border-color: var(--cvf-light-blue);
    box-shadow: 0 0 0 3px rgba(92, 196, 196, 0.25);
}

/* ---- Toggle button groups (selectable boxes) ---------------------------- */
.cvf-toggle {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 8px;
}
.cvf-toggle-3 { grid-template-columns: 1fr 1fr 1fr; }

.cvf-opt {
    /* NON-SELECTED state per spec: light grey background, WHITE text. */
    appearance: none;
    -webkit-appearance: none;
    border: 0;
    cursor: pointer;
    padding: 12px 10px;
    font-size: 14px;
    font-weight: 700;
    border-radius: 8px;
    background: var(--cvf-grey-2);
    color: #ffffff;
    text-align: center;
    transition: background-color .15s, color .15s, transform .05s;
    /* Subtle dark text-shadow keeps the WHITE label readable on light grey
       across desktop + iOS Safari + Android Chrome (spec demands readability). */
    text-shadow: 0 1px 2px rgba(0, 0, 0, 0.45);
    line-height: 1.2;
    -webkit-tap-highlight-color: transparent;
}
.cvf-opt:hover { background: #d4d4d4; }
.cvf-opt:active { transform: translateY(1px); }
.cvf-opt:focus-visible {
    outline: 3px solid var(--cvf-light-blue);
    outline-offset: 2px;
}
.cvf-opt.is-selected {
    /* SELECTED state per spec: blue background, WHITE text. */
    background: var(--cvf-blue-btn);
    color: #ffffff;
    text-shadow: none; /* solid blue already has strong contrast with white */
}

/* ---- Checkbox flags ----------------------------------------------------- */
.cvf-checkbox {
    display: flex;
    align-items: center;
    gap: 10px;
    background: #fff;
    border: 1px solid #e3e3e3;
    border-radius: 8px;
    padding: 10px 12px;
    cursor: pointer;
    font-size: 14px;
}
.cvf-checkbox input { accent-color: var(--cvf-blue-btn); }

/* ---- Action buttons ----------------------------------------------------- */
.cvf-actions, .cvf-result-actions {
    display: flex;
    gap: 10px;
    margin-top: 8px;
    flex-wrap: wrap;
}
.cvf-btn {
    appearance: none;
    border: 0;
    cursor: pointer;
    padding: 13px 22px;
    font-size: 15px;
    font-weight: 700;
    border-radius: 8px;
    transition: filter .15s, transform .05s;
    -webkit-tap-highlight-color: transparent;
}
.cvf-btn:active { transform: translateY(1px); }
.cvf-btn-primary {
    /* Same selected-state visual: blue background, white text. */
    background: var(--cvf-blue-btn);
    color: #ffffff;
}
.cvf-btn-primary:hover { filter: brightness(0.95); }
.cvf-btn-secondary {
    /* Reset button — NON-SELECTED visual style per spec. */
    background: var(--cvf-grey-2);
    color: #ffffff;
    text-shadow: 0 1px 2px rgba(0, 0, 0, 0.45);
}
.cvf-btn-secondary:hover { background: #d4d4d4; }

/* ---- Result panel ------------------------------------------------------- */
.cvf-result {
    margin-top: 18px;
    padding: 18px;
    background: #fff;
    border: 1px solid #e6e6e6;
    border-radius: var(--cvf-radius);
}
.cvf-result-title {
    margin: 0 0 12px;
    font-size: 18px;
    color: var(--cvf-dark-blue);
}
.cvf-result-grid { display: grid; gap: 8px; }
.cvf-result-row {
    display: flex;
    justify-content: space-between;
    align-items: baseline;
    padding: 8px 10px;
    background: var(--cvf-grey-1);
    border-radius: 6px;
    font-size: 14px;
}
.cvf-result-row strong { color: var(--cvf-dark-blue); font-size: 15px; }
.cvf-result-total { background: rgba(92, 196, 196, 0.18); }
.cvf-result-total strong { font-size: 17px; }

.cvf-explanation {
    margin: 12px 0 0;
    padding: 10px 12px;
    background: var(--cvf-grey-1);
    border-left: 4px solid var(--cvf-light-blue);
    border-radius: 6px;
    font-size: 13px;
    color: #333;
}

.cvf-review {
    margin-top: 10px;
    padding: 10px 12px;
    background: #FFF7DB;
    border-left: 4px solid var(--cvf-yellow);
    border-radius: 6px;
    font-size: 13px;
}

.cvf-errors {
    margin-top: 14px;
    padding: 10px 12px;
    background: #FDECEA;
    border-left: 4px solid #D93025;
    border-radius: 6px;
    color: #611A15;
    font-size: 13px;
}

.cvf-disclaimer {
    margin: 18px 0 0;
    font-size: 12px;
    color: #777;
    text-align: center;
}

/* ---- Responsive --------------------------------------------------------- */
@media (max-width: 480px) {
    .creddo-vat-fi { margin: 12px; }
    .cvf-header { padding: 18px 16px; }
    .cvf-body { padding: 18px 16px; }
    .cvf-toggle, .cvf-toggle-3 { grid-template-columns: 1fr; }
    .cvf-actions, .cvf-result-actions { flex-direction: column; }
    .cvf-btn { width: 100%; }
}