/* =========================================================
   DESIGN TOKENS & GLOBAL SETTINGS
   ========================================================= */

:root {
  --control-height: 44px;

  --radius-sm: 0.6rem;
  --radius-md: 0.65rem;
  --radius-lg: 0.75rem;

  /* Shadows */
  --shadow-soft: 0 4px 12px rgba(0, 0, 0, 0.05);
  --shadow-hover: 0 6px 16px rgba(0, 0, 0, 0.06);

  /* Borders */
  --border-light: rgba(0, 0, 0, 0.06);
  --border-default: rgba(0, 0, 0, 0.12);

  /* Focus / error */
  --error-ring: 0 0 0 0.15rem rgba(180, 60, 60, 0.22);

  /* UI border system */
  --ui-border: #d7dde3;
  --ui-border-soft: #e9edf1;
  --ui-border-hover: #b8c2cc;
  --ui-border-strong: #1f2d3d;
}


/* =========================================================
   GLOBAL LAYOUT
   ========================================================= */

html,
body {
  height: 100%;
}

body {
  font-size: 1.03rem;
}

body::before {
  content: "";
  position: fixed;
  inset: 0;
  z-index: -1;

  background: linear-gradient(
    180deg,
    #f8f9fa 0%,
    rgba(13, 110, 253, 0.04) 100%
  );
}


/* =========================================================
   PAGE ANIMATIONS
   ========================================================= */

.page-fade {
  opacity: 0;
  transform: translateY(6px);
  animation: pageFadeUp 400ms ease-out forwards;
}

.header-fade {
  opacity: 0;
  transform: translateY(8px);
  animation: heroFadeUp 450ms ease-out forwards;
}

@keyframes pageFadeUp {
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes heroFadeUp {
  to {
    opacity: 1;
    transform: translateY(0);
  }
}


/* =========================================================
   FORM CONTROLS — INPUT GROUP (RAL)
   ========================================================= */

.input-group {
  height: var(--control-height);
  border: 1px solid var(--ui-border);
  border-radius: var(--radius-sm);
  background-color: #ffffff;
  box-shadow: none;
  overflow: hidden;

  transition: border-color 0.15s ease, box-shadow 0.15s ease;
}

.input-group:focus-within {
  border-color: var(--ui-border-strong);
  box-shadow: 0 0 0 0.15rem rgba(31, 45, 61, 0.18);
}

.input-group:has(.form-control.is-invalid) {
  border-color: #dc3545;
  box-shadow: var(--error-ring);
}

.input-group-text.euro-prefix {
  display: flex;
  align-items: center;
  padding-right: 0.25rem;

  border: none;
  background-color: transparent;
  color: #6c757d;
  font-weight: 500;
}

.input-group .form-control {
  height: 100%;
  padding-left: 0.25rem;
  border: none;
  box-shadow: none;
}

.input-group .form-control.is-invalid {
  background-image: none;
  box-shadow: none;
}


/* =========================================================
   FORM CONTROLS — SELECT (CONTRATTO)
   ========================================================= */

.form-select {
  height: var(--control-height);
  padding: 0.55rem 2.2rem 0.55rem 0.9rem;

  border: 1px solid var(--ui-border);
  border-radius: var(--radius-sm);
  background-color: #ffffff;

  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 16 16' fill='none' stroke='%231f2d3d' stroke-width='2' stroke-linecap='round' stroke-linejoin='round' xmlns='http://www.w3.org/2000/svg'%3E%3Cpath d='M4 6l4 4 4-4'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 0.75rem center;
  background-size: 14px;

  transition: border-color 140ms ease, box-shadow 140ms ease, background-color 140ms ease;
}

.form-select:hover {
  border-color: var(--ui-border-hover);
  background-color: #fbfcfd;
}

.form-select:focus {
  border-color: var(--ui-border-strong);
  background-color: #ffffff;
  box-shadow: 0 0 0 0.15rem rgba(31, 45, 61, 0.18);
}

.form-select:active {
  background-color: #ffffff;
}


/* =========================================================
   ALTRE OPZIONI — COLLAPSIBLE PANEL
   ========================================================= */

.conditions-toggle {
  display: flex;
  justify-content: space-between;
  align-items: center;

  width: 100%;
  padding: 0.6rem 0.75rem;

  border: 1px solid var(--ui-border);
  border-radius: var(--radius-md);
  background: #ffffff;

  font-size: 0.9rem;
  font-weight: 500;
  color: #343a40;
  cursor: pointer;

  transition: background 150ms ease, border-color 150ms ease;
}

.conditions-toggle:hover {
  background: rgba(31, 45, 61, 0.04);
  border-color: var(--ui-border-hover);
}

.conditions-arrow {
  font-size: 1.05rem;
  transition: transform 220ms ease;
}

.conditions-toggle.is-open .conditions-arrow {
  transform: rotate(180deg);
}


/* Panel */

.conditions-panel {
  margin-top: 0;
  padding: 0 1.1rem;

  border: 1px solid transparent;
  border-radius: var(--radius-lg);
  background: #ffffff;
  box-shadow: var(--shadow-soft);

  max-height: 0;
  overflow: hidden;
  opacity: 0;
  transform: translateY(-4px);

  transition:
    max-height 350ms ease,
    opacity 220ms ease,
    transform 220ms ease,
    padding 250ms ease,
    margin 250ms ease,
    border-color 200ms ease;
}

.conditions-panel.is-open {
  margin-top: 0.75rem;
  padding: 1rem 1.1rem;

  border-color: var(--ui-border-soft);
  max-height: 500px;
  opacity: 1;
  transform: translateY(0);
}

.conditions-subtitle {
  margin: 1rem 0 0.5rem;

  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: #6c757d;
}


/* =========================================================
   CHECKBOX & RADIO
   ========================================================= */

.conditions-panel .form-check {
  display: flex;
  align-items: center;

  padding: 0.3rem 0.25rem;
  margin-bottom: 0.25rem;
  border-radius: 8px;

  transition: background 150ms ease;
}

.conditions-panel .form-check:hover {
  background: rgba(31, 45, 61, 0.05);
}

.conditions-panel .form-check-input {
  margin: 0 0.6rem 0 0;
}

.conditions-panel .form-check-label {
  margin: 0;
  font-size: 0.9rem;
  line-height: 1.35;
}

.conditions-panel .form-check:last-child {
  margin-bottom: 0;
}


/* =========================================================
   VALIDATION
   ========================================================= */

.ral-field:has(.form-control.is-invalid) .invalid-feedback {
  display: block;
}

.invalid-feedback {
  margin-top: 0.4rem;
  font-size: 0.85rem;
  line-height: 1.3;
  color: #dc3545;
}


/* =========================================================
   CARD
   ========================================================= */

.card {
  border: 1px solid var(--ui-border-soft);
  border-radius: var(--radius-lg);
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.04);

  transition: box-shadow 180ms ease;
}

.card-interactive:hover {
  box-shadow: var(--shadow-hover);
}

.card-title {
  margin-bottom: 0.5rem;
  font-size: 1.05rem;
  color: #2f3a45;
}


/* =========================================================
   BUTTONS
   ========================================================= */

.btn {
  border-radius: var(--radius-md);
}

#submit-btn {
  padding: 0.7rem;
  font-size: 1.05rem;

  background-color: var(--ui-border-strong);
  border-color: var(--ui-border-strong);

  box-shadow: 0 1px 2px rgba(0, 0, 0, 0.06);

  transition:
    background-color 160ms ease,
    border-color 160ms ease,
    box-shadow 160ms ease,
    filter 160ms ease;
}

#submit-btn:hover {
  background-color: #243447;
  border-color: #243447;
  box-shadow: 0 2px 5px rgba(0, 0, 0, 0.08);
}

#submit-btn:active {
  box-shadow: inset 0 2px 4px rgba(0, 0, 0, 0.15);
  filter: brightness(0.97);
}

#submit-btn:focus-visible {
  outline: none;
  box-shadow: 0 0 0 0.18rem rgba(31, 45, 61, 0.25);
}


/* =========================================================
   SEGMENTED BUTTONS (MENSILITA + PERIODO)
   ========================================================= */

.mensilita-group .btn,
.period-group .btn {
  padding-top: 0.45rem;
  padding-bottom: 0.45rem;
  line-height: 1.25;

  background: #ffffff;
  color: #495057;

  border: 1px solid var(--ui-border);
  box-shadow: none;

  transition: background 120ms ease, color 120ms ease, border-color 120ms ease;
}

.mensilita-group .btn + .btn,
.period-group .btn + .btn {
  border-left: none;
}

.mensilita-group .btn:hover,
.period-group .btn:hover {
  background: #f3f5f7;
  border-color: var(--ui-border-hover);
  color: #212529;
}

.mensilita-group .btn-check:checked + .btn,
.period-group .btn-check:checked + .btn {
  background: #1f2d3d;
  border-color: var(--ui-border-strong);
  color: #ffffff;
  font-weight: 500;
  z-index: 1;
}

.mensilita-group .btn:active,
.period-group .btn:active {
  background: #e9ecef;
}


/* =========================================================
   TYPOGRAPHY — RESULTS
   ========================================================= */

#netto-value {
  color: #1f2d3d;
  font-size: 2.15rem;
  font-weight: 700;
  letter-spacing: -0.01em;
  font-variant-numeric: tabular-nums;
}


/* =========================================================
   FOOTER
   ========================================================= */

.site-footer {
  padding: 1rem;
  font-size: 0.85rem;
  color: #6c757d;
  background: transparent;
}

.footer-inner {
  max-width: 680px;
  margin: 0 auto;
  text-align: center;
}

.footer-title {
  display: block;
  margin-bottom: 0.25rem;

  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: #6c757d;
}

.footer-disclaimer {
  margin-bottom: 0.75rem;
  line-height: 1.45;
}

.footer-divider {
  width: 40px;
  height: 1px;
  margin: 0.75rem auto;
  background-color: rgba(0, 0, 0, 0.08);
}

.footer-privacy-text {
  margin: 0;
  line-height: 1.45;
}


/* =========================================================
   RESULTS CARD OVERRIDE
   ========================================================= */

#results-card {
  border-color: #d2dae2;
  box-shadow: 0 6px 18px rgba(0, 0, 0, 0.06);
}