/*
 * FLOWAYZ — Signup Modal "Slippery Slide"
 * Animation premium (scale + translate + ease-out-premium)
 * Desktop: centered max-w-md. Mobile (< 640px): bottom-sheet.
 * Tokens: --ease-out-premium, --accent, --accent-20, --z-modal-*
 */

.signup-modal {
  position: fixed;
  inset: 0;
  z-index: var(--z-modal, 1050);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 1rem;
}

.signup-modal[hidden],
.signup-modal.is-hidden { display: none; }

.signup-modal-backdrop {
  position: absolute;
  inset: 0;
  background: rgba(15, 23, 42, 0.72);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  animation: signup-backdrop-in 0.2s ease-out;
  z-index: 0;
}

@keyframes signup-backdrop-in {
  from { opacity: 0; }
  to   { opacity: 1; }
}

.signup-modal-shell {
  position: relative;
  z-index: 1;
  width: 100%;
  max-width: 28rem;
  background: var(--bg-surface);
  color: var(--text-primary);
  border-radius: 20px;
  box-shadow: 0 32px 80px -16px rgba(15, 23, 42, 0.45), 0 0 0 1px rgba(255, 255, 255, 0.04);
  padding: 1.75rem 1.5rem 1.5rem;
  animation: signup-shell-in 0.28s var(--ease-out-premium, cubic-bezier(0.22, 1, 0.36, 1));
  transform-origin: center 40%;
  max-height: calc(100vh - 2rem);
  overflow-y: auto;
}

@keyframes signup-shell-in {
  from { transform: translateY(16px) scale(0.96) rotate(-0.4deg); opacity: 0; }
  to   { transform: translateY(0)    scale(1)    rotate(0);       opacity: 1; }
}

@keyframes signup-shell-out {
  from { transform: translateY(0)  scale(1);    opacity: 1; }
  to   { transform: translateY(8px) scale(0.98); opacity: 0; }
}

.signup-modal.is-closing .signup-modal-shell { animation: signup-shell-out 0.18s ease-in forwards; }
.signup-modal.is-closing .signup-modal-backdrop { animation: signup-backdrop-in 0.18s ease-in reverse forwards; }

/* ---- Stagger entrance ---- */
.signup-modal-shell .stagger-0,
.signup-modal-shell .stagger-1,
.signup-modal-shell .stagger-2,
.signup-modal-shell .stagger-3,
.signup-modal-shell .stagger-4 {
  opacity: 0;
  transform: translateY(8px);
}

.signup-modal.is-open .stagger-0 { animation: signup-stagger 0.36s var(--ease-out-premium, cubic-bezier(0.22, 1, 0.36, 1)) 60ms  forwards; }
.signup-modal.is-open .stagger-1 { animation: signup-stagger 0.36s var(--ease-out-premium, cubic-bezier(0.22, 1, 0.36, 1)) 120ms forwards; }
.signup-modal.is-open .stagger-2 { animation: signup-stagger 0.36s var(--ease-out-premium, cubic-bezier(0.22, 1, 0.36, 1)) 180ms forwards; }
.signup-modal.is-open .stagger-3 { animation: signup-stagger 0.36s var(--ease-out-premium, cubic-bezier(0.22, 1, 0.36, 1)) 260ms forwards; }
.signup-modal.is-open .stagger-4 { animation: signup-stagger 0.36s var(--ease-out-premium, cubic-bezier(0.22, 1, 0.36, 1)) 340ms forwards; }

@keyframes signup-stagger {
  from { opacity: 0; transform: translateY(8px); }
  to   { opacity: 1; transform: translateY(0);   }
}

/* ---- Header ---- */
.signup-modal-badge-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-bottom: 0.75rem;
}

.signup-modal-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  padding: 0.25rem 0.65rem;
  border-radius: 999px;
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.01em;
}

.signup-modal-badge--founder {
  background: linear-gradient(135deg, #FFD166 0%, #FF7B54 100%);
  color: #1A202C;
  box-shadow: 0 0 0 1px rgba(255, 209, 102, 0.4), 0 4px 12px -4px rgba(255, 123, 84, 0.4);
}

.signup-modal-badge--referral {
  background: var(--accent-10, hsla(14, 100%, 67%, 0.10));
  color: var(--accent, #FF7B54);
  border: 1px solid var(--accent-20, hsla(14, 100%, 67%, 0.20));
}

.signup-modal-badge--vertical {
  background: var(--bg-surface-hover, #F1F5F9);
  color: var(--text-secondary, #475569);
  border: 1px solid var(--border-default, #E2E8F0);
  font-weight: 600;
}

html.dark .signup-modal-badge--vertical {
  background: rgba(148, 163, 184, 0.12);
  color: #CBD5E1;
  border-color: rgba(148, 163, 184, 0.18);
}

.signup-modal-title {
  font-size: 1.5rem;
  font-weight: 800;
  line-height: 1.2;
  letter-spacing: -0.015em;
  margin: 0 0 0.25rem;
  color: var(--text-primary);
}

.signup-modal-subtitle {
  font-size: 0.92rem;
  color: var(--text-secondary, #4A5568);
  margin: 0 0 1.25rem;
}

.signup-modal-close {
  position: absolute;
  top: 12px;
  right: 12px;
  width: 32px;
  height: 32px;
  border-radius: 8px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background: transparent;
  border: none;
  color: var(--text-tertiary, #A0AEC0);
  cursor: pointer;
  transition: background 0.15s ease, color 0.15s ease;
}
.signup-modal-close:hover {
  background: var(--bg-surface-hover, #F7FAFC);
  color: var(--text-primary);
}

/* ---- Form fields ---- */
.signup-modal-field {
  margin-bottom: 0.9rem;
}

.signup-modal-label {
  display: block;
  font-size: 0.82rem;
  font-weight: 600;
  margin-bottom: 0.4rem;
  color: var(--text-primary);
}

.signup-modal-input-wrap {
  position: relative;
  display: flex;
  align-items: center;
}

.signup-input {
  width: 100%;
  padding: 0.78rem 0.95rem;
  background: var(--bg-surface);
  color: var(--text-primary);
  border: 1.5px solid var(--border-default, #E2E8F0);
  border-radius: 12px;
  font-size: 0.95rem;
  outline: none;
  transition: box-shadow 220ms var(--ease-out-premium, cubic-bezier(0.22, 1, 0.36, 1)),
              border-color 180ms ease,
              transform 180ms ease;
}

.signup-input::placeholder {
  color: var(--text-tertiary, #A0AEC0);
}

.signup-input:focus {
  border-color: var(--accent, #FF7B54);
  box-shadow: 0 0 0 4px var(--accent-20, hsla(14, 100%, 67%, 0.20)),
              0 0 24px -6px var(--accent-40, hsla(14, 100%, 67%, 0.40));
  transform: scale(1.005);
}

.signup-input[aria-invalid="true"] {
  border-color: #ef4444;
  box-shadow: 0 0 0 4px rgba(239, 68, 68, 0.15);
}

.signup-input.has-trailing { padding-right: 2.5rem; }

/* ---- Email sparkle validation ---- */
.signup-modal-sparkle {
  position: absolute;
  right: 0.75rem;
  width: 18px;
  height: 18px;
  color: var(--accent, #FF7B54);
  opacity: 0;
  transform: scale(0.8);
  pointer-events: none;
  transition: opacity 300ms var(--ease-out-premium, cubic-bezier(0.22, 1, 0.36, 1)),
              transform 300ms var(--ease-out-premium, cubic-bezier(0.22, 1, 0.36, 1));
}
.signup-modal-input-wrap.is-valid .signup-modal-sparkle {
  opacity: 1;
  transform: scale(1);
}

/* ---- Password eye toggle ---- */
.signup-modal-eye {
  position: absolute;
  right: 0.5rem;
  width: 32px;
  height: 32px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background: transparent;
  border: none;
  border-radius: 6px;
  color: var(--text-tertiary, #A0AEC0);
  cursor: pointer;
  transition: background 0.15s ease, color 0.15s ease;
}
.signup-modal-eye:hover {
  background: var(--bg-surface-hover, #F7FAFC);
  color: var(--text-primary);
}

/* ---- Password strength ---- */
.signup-modal-strength {
  display: flex;
  gap: 4px;
  margin-top: 0.45rem;
}

.signup-modal-strength-bar {
  height: 4px;
  flex: 1;
  border-radius: 999px;
  background: var(--bg-surface-hover, #E2E8F0);
  overflow: hidden;
  position: relative;
  transition: background-color 280ms var(--ease-out-premium, cubic-bezier(0.22, 1, 0.36, 1));
}

.signup-modal-hint {
  margin-top: 0.4rem;
  font-size: 0.78rem;
  color: var(--text-tertiary, #A0AEC0);
  min-height: 1.1em;
}

/* Shimmer sheen when strong — one-shot via class toggle */
.signup-modal-strength-bar--strong-sheen::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(110deg,
    transparent 0%,
    rgba(255, 255, 255, 0.75) 50%,
    transparent 100%);
  animation: strength-shimmer 0.9s var(--ease-out-premium, cubic-bezier(0.22, 1, 0.36, 1)) 1;
}

@keyframes strength-shimmer {
  from { transform: translateX(-120%); }
  to   { transform: translateX(120%); }
}

/* ---- CTA ---- */
.signup-cta {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  width: 100%;
  padding: 0.95rem 1.25rem;
  background: var(--accent, #FF7B54);
  color: var(--accent-contrast, #1A202C);
  border: none;
  border-radius: 12px;
  font-size: 1rem;
  font-weight: 700;
  letter-spacing: 0.005em;
  cursor: pointer;
  transition: transform 180ms var(--ease-out-premium, cubic-bezier(0.22, 1, 0.36, 1)),
              box-shadow 240ms ease,
              background-color 180ms ease;
  box-shadow: 0 10px 24px -10px rgba(255, 123, 84, 0.5);
}

.signup-cta:hover {
  transform: translateY(-2px);
  box-shadow: 0 16px 40px -12px rgba(255, 123, 84, 0.55);
  background: var(--accent-hover, #F5684B);
}

.signup-cta:active {
  transform: translateY(0) scale(0.98);
  box-shadow: 0 4px 16px -6px rgba(255, 123, 84, 0.4);
}

.signup-cta.is-loading {
  pointer-events: none;
  opacity: 0.9;
}

.signup-cta-spinner {
  width: 16px;
  height: 16px;
  border: 2px solid currentColor;
  border-right-color: transparent;
  border-radius: 50%;
  animation: signup-spin 0.7s linear infinite;
  display: none;
}

.signup-cta.is-loading .signup-cta-spinner { display: inline-block; }
.signup-cta.is-loading .signup-cta-label-default { display: none; }
.signup-cta-label-loading { display: none; }
.signup-cta.is-loading .signup-cta-label-loading { display: inline; }

@keyframes signup-spin {
  from { transform: rotate(0); }
  to   { transform: rotate(360deg); }
}

/* ---- Turnstile container ---- */
.signup-modal-turnstile {
  display: flex;
  justify-content: center;
  margin-top: 0.9rem;
  min-height: 0;
}

.signup-modal-turnstile:empty { display: none; }

/* ---- Micro-copy ---- */
.signup-modal-microcopy {
  margin-top: 0.95rem;
  font-size: 0.72rem;
  line-height: 1.55;
  color: var(--text-tertiary, #64748b);
  text-align: center;
}

.signup-modal-microcopy a {
  color: var(--text-secondary, #4A5568);
  text-decoration: underline;
  text-decoration-thickness: 1px;
  text-underline-offset: 2px;
}

.signup-modal-microcopy strong {
  color: var(--text-secondary, #4A5568);
  font-weight: 600;
}

.signup-modal-footer {
  margin-top: 1.1rem;
  padding-top: 0.9rem;
  border-top: 1px solid var(--border-default, #E2E8F0);
  text-align: center;
  font-size: 0.85rem;
  color: var(--text-secondary, #4A5568);
}

.signup-modal-footer a {
  color: var(--accent, #FF7B54);
  font-weight: 600;
  text-decoration: none;
}
.signup-modal-footer a:hover { text-decoration: underline; }

/* ---- Error banner inside modal ---- */
.signup-modal-error {
  background: rgba(239, 68, 68, 0.08);
  border: 1px solid rgba(239, 68, 68, 0.22);
  color: #b91c1c;
  border-radius: 10px;
  padding: 0.7rem 0.9rem;
  font-size: 0.85rem;
  margin-bottom: 0.9rem;
  line-height: 1.45;
}

html.dark .signup-modal-error {
  color: #fca5a5;
  background: rgba(239, 68, 68, 0.15);
  border-color: rgba(239, 68, 68, 0.3);
}

/* ---- Mobile bottom-sheet ---- */
@media (max-width: 639px) {
  .signup-modal { align-items: flex-end; padding: 0; }
  .signup-modal-shell {
    max-width: 100%;
    width: 100%;
    border-radius: 24px 24px 0 0;
    max-height: 94vh;
    padding: 1.5rem 1.25rem calc(env(safe-area-inset-bottom, 0px) + 1.25rem);
    animation: signup-sheet-up 0.32s var(--ease-out-premium, cubic-bezier(0.22, 1, 0.36, 1));
    transform-origin: bottom center;
  }
  @keyframes signup-sheet-up {
    from { transform: translateY(100%); opacity: 0.9; }
    to   { transform: translateY(0);    opacity: 1;   }
  }
  .signup-modal.is-closing .signup-modal-shell {
    animation: signup-sheet-down 0.22s ease-in forwards;
  }
  @keyframes signup-sheet-down {
    from { transform: translateY(0);    opacity: 1; }
    to   { transform: translateY(100%); opacity: 0.4; }
  }
  .signup-modal-shell::before {
    content: "";
    display: block;
    width: 40px;
    height: 4px;
    margin: -0.25rem auto 0.75rem;
    border-radius: 999px;
    background: var(--border-default, #E2E8F0);
  }
}

/* ---- Reduced motion ---- */
@media (prefers-reduced-motion: reduce) {
  .signup-modal-backdrop,
  .signup-modal-shell,
  .signup-modal-shell .stagger-0,
  .signup-modal-shell .stagger-1,
  .signup-modal-shell .stagger-2,
  .signup-modal-shell .stagger-3,
  .signup-modal-shell .stagger-4,
  .signup-modal-strength-bar--strong-sheen::after {
    animation: none !important;
    transition: none !important;
    opacity: 1 !important;
    transform: none !important;
  }
  .signup-cta:hover { transform: none; }
  .signup-modal.is-closing .signup-modal-shell,
  .signup-modal.is-closing .signup-modal-backdrop {
    animation: none !important;
  }
}