/* ═══════════════════════════════════════════════════════════════════
   COMPONENTS.CSS — Buttons · Forms · Misc UI
   Global scope
═══════════════════════════════════════════════════════════════════ */

/* ── BUTTONS ─────────────────────────────────────────────────────── */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--sp-2);
  padding: 0.6875rem 1.5rem;
  border-radius: var(--r-full);
  font-family: var(--font-body);
  font-size: 0.9375rem;
  font-weight: 600;
  letter-spacing: var(--ls-wide);
  text-decoration: none;
  white-space: nowrap;
  cursor: pointer;
  border: 2px solid transparent;
  transition: background var(--t-fast) var(--ease-out),
              color var(--t-fast) var(--ease-out),
              border-color var(--t-fast) var(--ease-out),
              transform var(--t-fast) var(--ease-out),
              box-shadow var(--t-fast) var(--ease-out);
  user-select: none;
}

.btn:hover  { transform: translateY(-1px); }
.btn:active { transform: translateY(0); }

/* Colourful 1: Teal (primary) */
.btn--teal {
  background: var(--c-teal);
  color: #0a2222;
  border-color: var(--c-teal);
}
.btn--teal:hover {
  background: var(--c-teal-dark);
  border-color: var(--c-teal-dark);
  box-shadow: 0 6px 24px rgba(46,204,204,.35);
}

/* Colourful 2: Orange (secondary) */
.btn--orange {
  background: var(--c-orange);
  color: #fff;
  border-color: var(--c-orange);
}
.btn--orange:hover {
  background: var(--c-orange-dark);
  border-color: var(--c-orange-dark);
  box-shadow: 0 6px 24px rgba(235,84,6,.35);
}

/* Neutral 0: Disabled button */
.btn--disabled {
  background: transparent;
  color: var(--c-text);
  border-color: var(--c-border);
}
.btn--disabled:hover {
  cursor: not-allowed;
}

/* Neutral 1: Ghost dark (outlined, adapts to theme) */
.btn--ghost {
  background: transparent;
  color: var(--c-text);
  border-color: var(--c-border);
}
.btn--ghost:hover {
  background: transparent;
  border-color: var(--c-orange);
  color: var(--c-orange);
}

/* Neutral 2: Ghost light (for dark backgrounds) */
.btn--ghost-light {
  background: rgba(255,255,255,.1);
  color: #fff;
  border-color: rgba(255,255,255,.4);
  backdrop-filter: blur(8px);
}
.btn--ghost-light:hover {
  background: rgba(255,255,255,.2);
  border-color: rgba(255,255,255,.7);
}

/* Full width modifier */
.btn--full { width: 100%; }

/* Size modifiers */
.btn--sm {
  padding: 0.4375rem 1rem;
  font-size: 0.8125rem;
}

.btn--lg {
  padding: 0.875rem 2rem;
  font-size: 1.0625rem;
}

/* ── FORM ELEMENTS ───────────────────────────────────────────────── */
.form-field {
  display: flex;
  flex-direction: column;
  gap: var(--sp-2);
  margin-bottom: var(--sp-5);
}

.form-label {
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--c-text);
  letter-spacing: var(--ls-wide);
}

.form-input {
  width: 100%;
  padding: 0.75rem 1rem;
  background: var(--c-surface);
  color: var(--c-text);
  border: 1.5px solid var(--c-border);
  border-radius: var(--r-md);
  font-size: 0.9375rem;
  letter-spacing: 0.01em;
  transition: border-color var(--t-fast), box-shadow var(--t-fast);
  outline: none;
}

.form-input::placeholder { color: var(--c-muted); }

.form-input:focus {
  border-color: var(--c-teal);
  box-shadow: 0 0 0 3px var(--c-teal-light);
}

.form-input:invalid:not(:placeholder-shown) {
  border-color: var(--c-orange);
  box-shadow: 0 0 0 3px var(--c-orange-light);
}

.form-error {
  display: none;
  font-size: 0.8125rem;
  color: var(--c-orange);
  letter-spacing: 0.01em;
}

.form-input:invalid:not(:placeholder-shown) ~ .form-error {
  display: block;
}

.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--sp-4);
}

@media (max-width: 480px) {
  .form-row { grid-template-columns: 1fr; }
}

.form-options {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--sp-4);
  margin-bottom: var(--sp-6);
}

.form-check {
  display: flex;
  align-items: flex-start;
  gap: var(--sp-2);
  cursor: pointer;
  font-size: 0.875rem;
  color: var(--c-text-2);
  margin-bottom: var(--sp-4);
  line-height: 1.5;
}

.form-check input[type="checkbox"] {
  width: 16px;
  height: 16px;
  min-width: 16px;
  margin-top: 2px;
  accent-color: var(--c-teal);
  cursor: pointer;
}

.form-link {
  color: var(--c-teal);
  font-size: 0.875rem;
  font-weight: 500;
  text-decoration: underline;
  text-decoration-color: transparent;
  transition: text-decoration-color var(--t-fast);
}

.form-link:hover { text-decoration-color: currentColor; }