/**
 * invite-card.css — FacultyPage Theme
 *
 * Collapsible "Invite a Friend" card.
 * - Header row always visible (icon + title + open/close toggle button)
 * - Body slides open/closed with max-height + opacity transition
 * - Toggle icon: ＋ when closed → ✕ when open (driven by JS class)
 * - Success state after sending
 * - Keyboard accessible (Enter / Space on header)
 */

/* ════════════════════════════════════════════════════════════
   CARD WRAPPER
   ════════════════════════════════════════════════════════════ */
.fp-invite-card {
  /*background: linear-gradient(135deg, var(--fp-terra) 0%, var(--fp-terra-dark) 100%);*/
  border: 1.5px solid rgba(196, 99, 58, 0.2);
  border-radius: var(--fp-radius-lg);
  overflow: hidden;
  transition: border-color var(--fp-transition),
              box-shadow var(--fp-transition);
}

.fp-invite-card.is-open {
  /*border-color: rgba(196, 99, 58, 0.35);*/
  box-shadow: 0 4px 16px rgba(196, 99, 58, 0.1);
}

/* ════════════════════════════════════════════════════════════
   HEADER ROW (always visible — acts as the toggle trigger)
   ════════════════════════════════════════════════════════════ */
.fp-invite-header {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding: 0.9rem 1.1rem;
  cursor: pointer;
  user-select: none;
  transition: background var(--fp-transition);
  outline: none;
}

.fp-invite-header:hover {
  background: rgba(196, 99, 58, 0.06);
}

.fp-invite-header:focus-visible {
  box-shadow: 0 0 0 3px rgba(196, 99, 58, 0.25) inset;
}

/* Icon tile */
.fp-invite-header-icon {
  width: 32px;
  height: 32px;
  border-radius: var(--fp-radius);
  background: var(--fp-terra);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.9rem;
  flex-shrink: 0;
  transition: background var(--fp-transition), transform 0.2s;
}
.fp-invite-card.is-open .fp-invite-header-icon {
  /*background: var(--fp-terra-dark);*/
  transform: scale(1.05);
}

/* Title + subtitle */
.fp-invite-header-text {
  flex: 1;
  min-width: 0;
}
.fp-invite-header-title {
  font-family: 'Fraunces', serif;  
  font-weight: 700;
  /*color: var(--fp-white);  */
  line-height: 1.2;
}
.fp-invite-header-sub {
  font-family: 'Space Mono', monospace;
  font-size: 0.72rem;
  letter-spacing: 0.05em;
  /*color: var(--fp-white);*/
  margin-top: 0.1rem;
}

/* ── TOGGLE ICON BUTTON (＋ / ✕) ── */
.fp-invite-toggle {
  width: 26px;
  height: 26px;
  border-radius: 50%;
  border: 1.5px solid rgba(196, 99, 58, 0.3);
  background: rgba(255, 255, 255, 0.5);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  font-size: 0.78rem;
  font-weight: 700;
  color: var(--fp-terra-dark);
  line-height: 1;
  transition: background var(--fp-transition),
              border-color var(--fp-transition),
              color var(--fp-transition),
              transform 0.2s cubic-bezier(0.4, 0, 0.2, 1);
  pointer-events: none; /* clicks handled by .fp-invite-header */
}

/* Open state — filled terra circle with ✕ */
.fp-invite-card.is-open .fp-invite-toggle {
  background: var(--fp-terra);
  border-color: var(--fp-terra);
  color: white;
}

/* ════════════════════════════════════════════════════════════
   COLLAPSIBLE BODY
   max-height transition: closed → 0, open → enough px
   ════════════════════════════════════════════════════════════ */
.fp-invite-body {
  max-height: 0;
  overflow: hidden;
  opacity: 0;
  padding: 0 1.1rem;
  transition: max-height 0.3s cubic-bezier(0.4, 0, 0.2, 1),
              opacity 0.25s ease,
              padding 0.3s ease;
}

.fp-invite-card.is-open .fp-invite-body {
  max-height: 220px; /* enough for description + form */
  opacity: 1;
  padding: 0 1.1rem 0.9rem;
}



/* Email form row */
.fp-invite-form {
  display: flex;
  gap: 0.5rem;
}

.fp-invite-input {
  flex: 1;
  min-width: 0;
  background: var(--fp-white);
  border: 1.5px solid var(--fp-border);
  border-radius: var(--fp-radius-sm);
  padding: 0.48rem 0.75rem;
  font-family: 'Instrument Sans', sans-serif;
  font-size: 0.8rem;
  color: var(--fp-charcoal);
  outline: none;
  transition: border-color var(--fp-transition), box-shadow var(--fp-transition);
}
.fp-invite-input:focus {
  border-color: var(--fp-terra);
  box-shadow: 0 0 0 3px rgba(196, 99, 58, 0.1);
}
.fp-invite-input::placeholder { color: var(--fp-sand); }

.fp-invite-btn {
  padding: 0.48rem 0.9rem;
  background: var(--fp-terra);
  color: white;
  border: none;
  border-radius: var(--fp-radius-sm);
  font-family: 'Instrument Sans', sans-serif;
  font-size: 0.8rem;
  font-weight: 600;
  cursor: pointer;
  white-space: nowrap;
  transition: background var(--fp-transition);
  flex-shrink: 0;
}
.fp-invite-btn:hover { background: var(--fp-terra-dark); }
.fp-invite-btn:disabled {
  opacity: 0.6;
  cursor: not-allowed;
}

/* ── SUCCESS STATE ── */
.fp-invite-success {
  display: none;
  align-items: center;
  gap: 0.5rem;
  padding: 0.5rem 0.75rem;
  background: var(--fp-white);
  border: 1.5px solid rgba(45, 122, 79, 0.3);
  border-radius: var(--fp-radius-sm);
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--fp-green);
  animation: fp-invite-fade-in 0.25s ease;
}
.fp-invite-success.is-visible {
  display: flex;
}

@keyframes fp-invite-fade-in {
  from { opacity: 0; transform: translateY(-4px); }
  to   { opacity: 1; transform: translateY(0); }
}

/* ── ERROR STATE ── */
.fp-invite-input.is-invalid {
  border-color: var(--fp-terra);
  box-shadow: 0 0 0 3px rgba(196, 99, 58, 0.15);
  animation: fp-invite-shake 0.3s ease;
}

@keyframes fp-invite-shake {
  0%, 100% { transform: translateX(0); }
  25%       { transform: translateX(-4px); }
  75%       { transform: translateX(4px); }
}

/* ════════════════════════════════════════════════════════════
   RESPONSIVE
   ════════════════════════════════════════════════════════════ */
@media (max-width: 480px) {
  .fp-invite-form {
    flex-direction: column;
  }
  .fp-invite-btn {
    width: 100%;
    text-align: center;
  }
}