/* =====================================================
   auth.css — Login / Sign-up Screen
   Expense Tracker v0.2.0
   ===================================================== */

#authScreen {
  position: fixed; inset: 0; z-index: 500;
  background: linear-gradient(160deg, #1a1a1a 0%, #111111 100%);
  display: flex; flex-direction: column;
  align-items: center; justify-content: center;
  padding: var(--sp-5); gap: 0;
  overflow-y: auto;
}

.auth-box {
  background: var(--c-surface); border-radius: 24px;
  padding: 32px 28px; width: 100%; max-width: 380px;
  box-shadow: var(--shadow-xl); position: relative;
  animation: scaleIn .35s cubic-bezier(.22,1,.36,1);
}

/* Logo area */
.auth-logo { text-align: center; margin-bottom: 24px; }
.auth-logo-icon {
  width: 64px; height: 64px; border-radius: 18px;
  background: linear-gradient(135deg, var(--c-primary), var(--c-secondary));
  display: inline-flex; align-items: center; justify-content: center;
  font-size: 32px; margin-bottom: 12px;
}
.auth-logo h1 { font-size: 22px; font-weight: 900; }
.auth-logo p  { font-size: 11px; color: var(--c-text3); margin-top: 3px; letter-spacing: .5px; }
.auth-ver     { font-size: 10px; color: var(--c-primary); font-family: var(--font-mono); margin-top: 2px; }

/* Tabs */
.auth-tabs { display: flex; background: var(--c-surface2); border-radius: 10px; padding: 3px; margin-bottom: 20px; }
.auth-tab {
  flex: 1; text-align: center; padding: 8px;
  border-radius: 8px; font-size: 13px; font-weight: 700;
  color: var(--c-text2); cursor: pointer; transition: all var(--t-base);
}
.auth-tab.active { background: var(--c-surface); color: var(--c-primary); box-shadow: var(--shadow-sm); }

/* Panels */
.auth-panel { display: none; }
.auth-panel.active { display: block; }

/* Fields */
.auth-field {
  width: 100%; background: var(--c-surface2);
  border: 1.5px solid var(--c-border);
  border-radius: var(--r-sm); color: var(--c-text);
  font-size: 14px; padding: 12px 14px;
  outline: none; transition: all var(--t-base);
  margin-bottom: 10px;
}
.auth-field:focus { border-color: var(--c-primary); background: #fff; }

/* Google button */
.btn-google {
  width: 100%; background: var(--c-surface);
  border: 1.5px solid var(--c-border);
  border-radius: var(--r-sm); color: var(--c-text);
  font-size: 14px; font-weight: 700; padding: 12px;
  cursor: pointer; display: flex; align-items: center; justify-content: center; gap: 8px;
  transition: all var(--t-base); margin-bottom: 10px; font-family: inherit;
}
.btn-google:hover { border-color: #4285f4; background: #F8F9FF; }

/* Loading overlay */
.auth-loading {
  position: absolute; inset: 0; background: rgba(255,255,255,.85);
  display: none; align-items: center; justify-content: center;
  border-radius: 24px; z-index: 10;
}
.auth-loading.show { display: flex; }