/* ============================================================
   login.css  –  Login / Signup page styles  (card flip)
   ============================================================ */

/* ── Password toggle button ─────────────────────────────────── */
.pw-toggle-btn {
  position: absolute;
  right: 12px;
  top: 50%;
  transform: translateY(-50%);
  background: none;
  border: none;
  cursor: pointer;
  font-size: 16px;
  color: var(--text-hint);
  padding: 2px 4px;
  transition: color 0.15s;
  line-height: 1;
}
.pw-toggle-btn:hover { color: var(--text-secondary); }

/* ── Flip card wrapper ──────────────────────────────────────── */
.flip-card {
  width: 100%;
  max-width: 390px;
  /* Height auto-sizes to the taller face */
  perspective: 1200px;
}

.flip-card-inner {
  position: relative;
  width: 100%;
  transition: transform 0.65s cubic-bezier(0.4, 0.2, 0.2, 1);
  transform-style: preserve-3d;
}

/* When flipped, rotate to show back */
.flip-card.flipped .flip-card-inner {
  transform: rotateY(180deg);
}

/* Both faces share positioning */
.flip-card-front,
.flip-card-back {
  width: 100%;
  backface-visibility: hidden;
  -webkit-backface-visibility: hidden;
}

/* Front is default visible */
.flip-card-front {
  position: relative;
}

/* Back starts rotated 180deg (hidden) */
.flip-card-back {
  position: absolute;
  top: 0;
  left: 0;
  transform: rotateY(180deg);
}

/* ── Forgot password overlay ────────────────────────────────── */
.forgot-overlay {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--surface);
  opacity: 0;
  pointer-events: none;
  transform: translateY(16px);
  transition: opacity 0.35s ease, transform 0.35s ease;
  z-index: 10;
}

.forgot-overlay:not(.hidden) {
  opacity: 1;
  pointer-events: all;
  transform: translateY(0);
}

/* Override .hidden for forgot overlay (use visibility trick) */
.forgot-overlay.hidden {
  display: flex !important; /* keep in DOM for animation */
  opacity: 0;
  pointer-events: none;
  transform: translateY(16px);
}

/* Make auth-panel relative for forgot overlay positioning */
.auth-panel {
  position: relative;
  overflow: hidden;
}

/* ── Make flip-card-inner height match the taller face ──────
   The back is absolute so we use a grid stacking trick:
   both faces sit in the same grid cell, inner height = max of both */
.flip-card-inner {
  display: grid;
}
.flip-card-front,
.flip-card-back {
  grid-area: 1 / 1;
}
/* Front stays in flow to set natural height */
.flip-card-back {
  position: relative; /* override absolute so grid measures it too */
  transform: rotateY(180deg);
  visibility: hidden; /* hide until flipped */
}
.flip-card.flipped .flip-card-back  { visibility: visible; }
.flip-card.flipped .flip-card-front { visibility: hidden; }