/**
 * Shared sign-in / sign-up modal for Seedex studio pages (TTS, Image, etc.).
 * Expects page :root to define --bg, --surface, --surface2, --border, --text, --muted.
 */
.seedex-auth-overlay {
  position: fixed;
  inset: 0;
  z-index: 10050;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 1.25rem;
  background: rgba(7, 9, 14, 0.78);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
}

.seedex-auth-overlay.hidden {
  display: none;
}

.seedex-auth-card {
  position: relative;
  width: min(420px, 100%);
  max-height: min(92vh, 640px);
  overflow-y: auto;
  border-radius: 16px;
  background: var(--surface);
  border: 1px solid var(--border);
  box-shadow:
    0 0 0 1px rgba(255, 255, 255, 0.04) inset,
    0 24px 48px rgba(0, 0, 0, 0.5),
    0 8px 16px rgba(0, 0, 0, 0.25);
}

.seedex-auth-card::before {
  content: "";
  display: block;
  height: 3px;
  border-radius: 16px 16px 0 0;
  background: linear-gradient(90deg, #f59e0b, #ea580c, #fbbf24);
}

.seedex-auth-inner {
  padding: 1.375rem 1.5rem 1.5rem;
}

.seedex-auth-close {
  position: absolute;
  top: 0.85rem;
  right: 0.85rem;
  width: 2rem;
  height: 2rem;
  display: flex;
  align-items: center;
  justify-content: center;
  border: none;
  border-radius: 8px;
  background: transparent;
  color: var(--muted);
  font-size: 1.25rem;
  line-height: 1;
  cursor: pointer;
  transition: background 0.15s, color 0.15s;
}

.seedex-auth-close:hover {
  background: var(--surface2, rgba(255, 255, 255, 0.06));
  color: var(--text);
}

.seedex-auth-brand {
  display: flex;
  align-items: flex-start;
  gap: 0.75rem;
  margin-bottom: 1.125rem;
  padding-right: 2rem;
}

.seedex-auth-logo {
  flex-shrink: 0;
  border-radius: 10px;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.25);
}

.seedex-auth-headings h2 {
  margin: 0 0 0.35rem;
  font-size: 1.1875rem;
  font-weight: 650;
  letter-spacing: -0.02em;
  color: var(--text);
  line-height: 1.25;
}

.seedex-auth-lead {
  margin: 0;
  font-size: 0.8125rem;
  line-height: 1.45;
  color: var(--muted);
}

.seedex-auth-google-wrap {
  display: none;
  margin-bottom: 0;
}

.seedex-auth-btn-google {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  width: 100%;
  padding: 0.6rem 1rem;
  border-radius: 10px;
  border: 1px solid rgba(0, 0, 0, 0.08);
  background: #fff;
  color: #3c4043;
  font-size: 0.875rem;
  font-weight: 600;
  text-decoration: none;
  cursor: pointer;
  transition: background 0.15s, box-shadow 0.15s;
  box-shadow: 0 1px 2px rgba(0, 0, 0, 0.06);
}

.seedex-auth-btn-google:hover {
  background: #f8f9fa;
  box-shadow: 0 2px 6px rgba(0, 0, 0, 0.08);
}

.seedex-auth-divider {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  margin: 1rem 0;
  color: var(--muted);
  font-size: 0.75rem;
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.06em;
}

.seedex-auth-divider::before,
.seedex-auth-divider::after {
  content: "";
  flex: 1;
  height: 1px;
  background: var(--border);
}

.seedex-auth-segment {
  display: flex;
  padding: 3px;
  gap: 2px;
  margin-bottom: 1.125rem;
  border-radius: 11px;
  background: var(--surface2, rgba(255, 255, 255, 0.04));
  border: 1px solid var(--border);
}

.seedex-auth-segment button {
  flex: 1;
  border: none;
  padding: 0.5rem 0.65rem;
  border-radius: 8px;
  background: transparent;
  color: var(--muted);
  font-size: 0.8125rem;
  font-weight: 600;
  font-family: inherit;
  cursor: pointer;
  transition: background 0.15s, color 0.15s, box-shadow 0.15s;
}

.seedex-auth-segment button.active {
  background: var(--bg);
  color: var(--text);
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.25);
}

.seedex-auth-form {
  display: none;
}

.seedex-auth-form.active {
  display: block;
}

.seedex-auth-field {
  margin-bottom: 0.875rem;
}

.seedex-auth-field label {
  display: block;
  margin-bottom: 0.35rem;
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--muted);
  letter-spacing: 0.02em;
}

.seedex-auth-field input {
  width: 100%;
  box-sizing: border-box;
  padding: 0.58rem 0.75rem;
  border: 1px solid var(--border);
  border-radius: 10px;
  background: var(--bg);
  color: var(--text);
  font-size: 0.875rem;
  font-family: inherit;
  transition: border-color 0.15s, box-shadow 0.15s;
}

.seedex-auth-field input:focus {
  outline: none;
  border-color: rgba(245, 158, 11, 0.55);
  box-shadow: 0 0 0 3px rgba(245, 158, 11, 0.14);
}

.seedex-auth-error {
  min-height: 1.25rem;
  margin: 0.35rem 0 0.15rem;
  font-size: 0.78rem;
  line-height: 1.35;
  color: var(--error, #ef4444);
}

.seedex-auth-submit {
  width: 100%;
  margin-top: 0.35rem;
  padding: 0.65rem 1rem;
  border: none;
  border-radius: 10px;
  font-size: 0.875rem;
  font-weight: 650;
  font-family: inherit;
  cursor: pointer;
  color: #1a1207;
  background: linear-gradient(180deg, #fbbf24 0%, #f59e0b 40%, #d97706 100%);
  box-shadow:
    0 1px 0 rgba(255, 255, 255, 0.22) inset,
    0 2px 10px rgba(245, 158, 11, 0.28);
  transition: filter 0.15s, transform 0.08s;
}

.seedex-auth-submit:hover {
  filter: brightness(1.06);
}

.seedex-auth-submit:active {
  transform: scale(0.992);
}