/* =============================================================================
   controls.css — button, input, textarea, form contatto
   Tutto monocromo. Nessun bottone colorato. Nessun gradient. Focus ring nero.
   ============================================================================= */

/* -----------------------------------------------------------------------------
   BUTTON — due varianti: primary (filled ink) e secondary (outlined)
   ----------------------------------------------------------------------------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  font-family: var(--font-sans);
  font-size: var(--step-0);
  font-weight: var(--fw-medium);
  line-height: 1;
  letter-spacing: 0;
  padding: var(--space-3) var(--space-5);
  border-radius: var(--radius-1);
  border: 1px solid transparent;
  cursor: pointer;
  text-decoration: none;
  transition: background-color var(--dur-fast) var(--ease),
              color var(--dur-fast) var(--ease),
              border-color var(--dur-fast) var(--ease),
              transform var(--dur-fast) var(--ease);
  appearance: none;
  -webkit-appearance: none;
}

.btn:focus-visible {
  outline: var(--focus-ring-width) solid var(--focus-ring-color);
  outline-offset: var(--focus-ring-offset);
}

.btn:active {
  transform: translateY(1px);
}

/* Primary — filled ink su paper, testo paper */
.btn-primary {
  background: var(--ink);
  color: var(--paper);
  border-color: var(--ink);
}

.btn-primary:hover {
  background: var(--paper);
  color: var(--ink);
  text-decoration: none;
}

/* Secondary — outlined */
.btn-secondary {
  background: transparent;
  color: var(--ink);
  border-color: var(--ink);
}

.btn-secondary:hover {
  background: var(--ink);
  color: var(--paper);
  text-decoration: none;
}

/* Ghost — solo testo con underline su hover (per azioni discrete) */
.btn-ghost {
  background: transparent;
  color: var(--ink);
  border-color: transparent;
  padding-inline: var(--space-2);
}

.btn-ghost:hover {
  background: var(--selection);
  text-decoration: underline;
  text-decoration-thickness: 2px;
}

/* Size variants */
.btn-sm {
  font-size: var(--step--1);
  padding: var(--space-2) var(--space-4);
}

.btn-lg {
  font-size: var(--step-1);
  padding: var(--space-4) var(--space-6);
}

.btn:disabled,
.btn[aria-disabled="true"] {
  opacity: 0.5;
  cursor: not-allowed;
  pointer-events: none;
}

/* -----------------------------------------------------------------------------
   FORM — stack verticale con label small-caps sopra i campi
   ----------------------------------------------------------------------------- */
.form {
  max-width: var(--measure-narrow);
  display: flex;
  flex-direction: column;
  gap: var(--space-5);
}

.form-field {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}

.form-label {
  font-family: var(--font-sans);
  font-size: var(--step--1);
  font-weight: var(--fw-semibold);
  letter-spacing: var(--tracking-wide);
  text-transform: uppercase;
  color: var(--ink);
  line-height: 1.3;
}

.form-label-required::after {
  content: " *";
  color: var(--ink);
}

.form-help {
  font-family: var(--font-sans);
  font-size: var(--step--1);
  color: var(--ink-muted);
  line-height: var(--lh-snug);
  margin-top: var(--space-1);
}

/* Input, textarea, select — stile unificato */
.form-input,
.form-textarea,
.form-select {
  display: block;
  width: 100%;
  font-family: var(--font-serif);
  font-size: var(--step-0);
  line-height: var(--lh-snug);
  color: var(--ink);
  background: var(--paper);
  border: 1px solid var(--rule);
  border-bottom-color: var(--ink);  /* border-bottom piu' forte = segnale di input-line */
  border-radius: var(--radius-1);
  padding: var(--space-3) var(--space-4);
  appearance: none;
  -webkit-appearance: none;
  transition: border-color var(--dur-fast) var(--ease),
              background-color var(--dur-fast) var(--ease);
}

.form-textarea {
  min-height: 10rem;
  resize: vertical;
}

.form-input::placeholder,
.form-textarea::placeholder {
  color: var(--ink-subtle);
  font-style: italic;
}

.form-input:hover,
.form-textarea:hover,
.form-select:hover {
  border-color: var(--ink);
}

.form-input:focus,
.form-textarea:focus,
.form-select:focus {
  outline: var(--focus-ring-width) solid var(--focus-ring-color);
  outline-offset: var(--focus-ring-offset);
  border-color: var(--ink);
}

.form-input:focus-visible,
.form-textarea:focus-visible,
.form-select:focus-visible {
  outline: var(--focus-ring-width) solid var(--focus-ring-color);
  outline-offset: var(--focus-ring-offset);
}

/* Error state */
.form-field-error .form-input,
.form-field-error .form-textarea,
.form-field-error .form-select {
  border-color: var(--ink);
  border-bottom-width: 2px;
  background: #FFF6D6;  /* derivato da selection, low-sat */
}

.form-error {
  font-family: var(--font-sans);
  font-size: var(--step--1);
  font-weight: var(--fw-semibold);
  color: var(--ink);
  letter-spacing: var(--tracking-wide);
  text-transform: uppercase;
  margin-top: var(--space-1);
}

.form-error::before {
  content: "↳ ";
  color: var(--ink);
}

/* Checkbox & radio — monocromi, squadrati */
.form-check {
  display: flex;
  align-items: flex-start;
  gap: var(--space-3);
  font-family: var(--font-serif);
  font-size: var(--step-0);
  line-height: var(--lh-snug);
}

.form-check input[type="checkbox"],
.form-check input[type="radio"] {
  appearance: none;
  -webkit-appearance: none;
  width: 1.1em;
  height: 1.1em;
  flex-shrink: 0;
  margin-top: 0.25em;
  background: var(--paper);
  border: 1.5px solid var(--ink);
  border-radius: var(--radius-0);
  cursor: pointer;
  transition: background-color var(--dur-fast) var(--ease);
}

.form-check input[type="radio"] {
  border-radius: 50%;
}

.form-check input[type="checkbox"]:checked {
  background: var(--ink);
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 16 16' fill='%23FFFFFF'%3E%3Cpath d='M6.5 10.5L3 7l1-1 2.5 2.5L12 3l1 1z'/%3E%3C/svg%3E");
  background-size: 80% 80%;
  background-position: center;
  background-repeat: no-repeat;
}

.form-check input[type="radio"]:checked {
  background: var(--ink);
  box-shadow: inset 0 0 0 3px var(--paper);
}

.form-check input:focus-visible {
  outline: var(--focus-ring-width) solid var(--focus-ring-color);
  outline-offset: var(--focus-ring-offset);
}

/* Honeypot — nascondiamo totalmente il campo anti-spam */
.form-honeypot {
  position: absolute;
  left: -9999px;
  width: 1px;
  height: 1px;
  overflow: hidden;
}

/* -----------------------------------------------------------------------------
   ACTIONS ROW — gruppo bottoni in fondo al form
   ----------------------------------------------------------------------------- */
.form-actions {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-3);
  align-items: center;
  margin-top: var(--space-3);
}

.form-actions-note {
  font-family: var(--font-sans);
  font-size: var(--step--1);
  color: var(--ink-muted);
  line-height: var(--lh-snug);
  margin-left: auto;
  max-width: 24ch;
  text-align: right;
}

/* -----------------------------------------------------------------------------
   FORM-FEEDBACK — messaggio post-submit (successo/errore)
   ----------------------------------------------------------------------------- */
.form-feedback {
  padding: var(--space-4) var(--space-5);
  border: 1px solid var(--ink);
  border-radius: var(--radius-1);
  font-family: var(--font-serif);
  font-size: var(--step-0);
  line-height: var(--lh-snug);
  color: var(--ink);
}

.form-feedback-success {
  background: var(--selection);
}

.form-feedback-eyebrow {
  font-family: var(--font-sans);
  font-size: var(--step--1);
  font-weight: var(--fw-semibold);
  letter-spacing: var(--tracking-wide);
  text-transform: uppercase;
  color: var(--ink);
  margin-bottom: var(--space-2);
}